WorldWideScience

Sample records for t-h characteristics determination

  1. Primary circuit and reactor core T-H characteristics determination of WWER 440 reactors

    International Nuclear Information System (INIS)

    Hermansky, J.; Petenyi, V.; Zavodsky, M.

    2010-01-01

    The WWER-440 nuclear fuel vendor permanently improves the assortment of produced nuclear fuel assemblies for achieving better fuel cycle economy and reactor operation safety. During unit refuelling there also could be made some other changes in hydraulic parameters of primary circuit (change of impeller wheels, hydraulic resistance coefficient changes of internal parts of primary circuit, etc.). Therefore it is necessary to determine real coolant flow rate through the reactor during units start-up after their refuelling, and also to have the skilled methodology and computing code for analyzing factors, which affecting the inaccuracy of coolant flow redistribution determination through reactor on flows through separate parts of reactor core in any case of parallel operation of different assembly types. Computing code TH-VCR and CORFLO are used for reactor core characteristics determination for one type of fuel and control assemblies and also in case of parallel operation of different assembly types. The code TH-VCR is able to calculate coolant flow rate for different combinations of three different fuel assembly channel types and three different control assembly channel types. The CORFLO code deals the area of the reactor core which consists of 312 fuel assemblies and 37 control assemblies. Regarding the rotational 60 deg symmetry of reactor core only 1/6 of reactor core with 59 fuel assemblies is taken into account. Computing code CORFLO is verified and validated at this time. Paper presents some results from measurements of coolant flow rate through reactors during start-up after unit refuelling and short description of computing code TH-VCR and CORFLO with some calculated results. (Authors)

  2. Reactor core T-H characteristics determination in case of parallel operation of different fuel assembly types

    International Nuclear Information System (INIS)

    Hermansky, J.; Petenyi, V.; Zavodsky, M.

    2009-01-01

    The WWER-440 nuclear fuel vendor permanently improve the assortment of produced nuclear fuel assemblies for achieving better fuel cycle economy and reactor operation safety. Therefore it is necessary to have the skilled methodology and computing code for analyzing factors which affecting the accuracy of flow redistributed determination through reactor on flows through separate parts of reactor core in case of parallel operation different assembly types. Whereas the geometric parameters of new manufactured assemblies were changed recently, the calculated flows through the fuel parts of different type of assemblies are depended also on their real position in reactor core. Therefore the computing code CORFLO was developed in VUJE Trnava for carrying out stationary analyses of T-H characteristics of reactor core within 60 deg symmetry. The CORFLO code deals the area of the active core which consists of 312 fuel assemblies and 37 control assemblies. Regarding the rotational 60 deg symmetry of reactor core only 1/6 of reactor core with 59 fuel assemblies is calculated. Computing code is verified and validated at this time. Paper presents the short description of computing code CORFLO with some calculated results. (Authors)

  3. Experimental study on dew point corrosion characteristics of the heating surface in a 65 t/h biomass-fired circulating fluidized bed boiler

    International Nuclear Information System (INIS)

    Wang, Yungang; Ma, Haidong; Liang, Zhiyuan; Chen, Heng; Zhao, Qinxin; Jin, Xin

    2016-01-01

    Highlights: • Dew point corrosion and ash deposit tests in a biomass-fired boiler were performed. • The XRD, XRF and SEM methods were used to analyze corrosion samples. • The deposits were made up of ash deposit layer, coupling layer and corrosion layer. • The metal matrix simultaneously confronted chlorine corrosion and oxygen corrosion. - Abstract: The dew point corrosion characteristics of the heating surface in a 65 t/h biomass-fired circulating fluidized bed (CFB) boiler were experimentally studied. The cross-sectional morphology and composition of the ash deposition were analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray fluorescence spectrum (XRF), respectively. The results showed that the test tube surface was covered by ash deposit layer, coupling layer and corrosion layer. The ash deposit layer and the coupling layer were prone to spall off together. The coupling layer consists of partial ash and corrosion products. The corrosion layer was mainly composed of chlorides (FeCl_3, FeCl_2, and FeOCl) and oxides (FeOOH, Fe_2O_3). With the increase of the tube wall temperature, the corrosion depth decreased dramatically and the dew point corrosion was alleviated efficiently. The metal matrix simultaneously suffered from chlorine corrosion and oxygen corrosion. As the tube wall temperature was above water dew point, the main corrosion mode was oxygen corrosion. As the tube wall temperature was below water dew point, the main corrosion mode was chlorine corrosion.

  4. Maintaining continuity through a scientific revolution: a rereading of E. B. Wilson and T. H. Morgan on sex determination and Mendelism.

    Science.gov (United States)

    Kingsland, Sharon E

    2007-09-01

    A rereading of the American scientific literature on sex determination from 1902 to 1926 leads to a different understanding of the construction of the Mendelian-chromosome theory after 1910. There was significant intellectual continuity, which has not been properly appreciated, underlying this scientific "revolution." After reexamining the relationship between the ideas of key scientists, in particular Edmund B. Wilson and Thomas Hunt Morgan, I argue that, contrary to the historical literature, Wilson and Morgan did not adopt opposing views on Mendelism and sex determination. Rather, each preferred a non-Mendelian explanation of the determination of sex. Around 1910, both integrated the Mendelian and non-Mendelian theories to create a synthetic theory. One problem was the need to avoid an overly deterministic view of sex while also accepting the validity of Mendelism. Morgan's discovery of mutations on the X chromosome takes on different significance when set in the context of the debate about sex determination, and Calvin Bridges's work on sex determination is better seen as a development of Morgan's ideas, rather than a departure from them. Conclusions point to the role of synthesis within fields as a way to advance scientific theories and reflect on the relationship between synthesis and explanatory "pluralism" in biology.

  5. THE DETERMINATION THE POLLUTION EMISSIONS OF SO2, NOX, CO, CO2 AND O2 FROM THE CHANNELS OF BURNT GAS ON BOILER OF 420 T/H - STEAM, IN THE SIGHT APPLICATION PROCEEDING TO REDUCE OF THESE

    Directory of Open Access Journals (Sweden)

    Valentin Nedeff

    2007-03-01

    Full Text Available The work present the results obtained after dynamic analyze the pollution emissions of SO2, NOx, CO, CO2 and O2 on evacuation channels of burnt gas on boiler of 420 t/h steam, having right the basic combustible the lignite, and auxiliary combustible the fuel oil and the natural gas. The values of pollution emission was analyze beside the admissible maxims values required by European legislation for Romania in the year 2005. The conclusion elaborated it adverted to: the values of oxides azoth, carry they frame in the limits provide in Environmental Authorization, under 60 mg/Nmc on 6% oxygen, the concentration values of SO2 which was bigger in report with one authorized comprised between 3500-3900 mg/Nmc confronted by 3400 mg/Nm. For integration in the foresee Government Decision 541/2003 aren't sufficient just proceeding of below reduce SO2, must take and another measures such as: get the fuel with quantity of sulphur 0.5% and with a content of ash below 35%.

  6. Physical characteristics as determinants of adolescents' moral ...

    African Journals Online (AJOL)

    This study was designed to investigate the physical characteristics as determinants of adolescent moral behaviour in Ekiti State secondary schools. Two research hypotheses were formulated. The research design used was the descriptive of the survey type. The population for this study was made up of all adolescents in ...

  7. T.H. Marshall og det moderne medborgerskab

    DEFF Research Database (Denmark)

    Jæger, Mads Meier

    The major theme of this article is the theory of citizenship put forward by British Sociologist T. H. Marshall in his famous 1949 essay Citizenship and Social Class. The academic interpretations and political uses (and abuses) of Marshall’s seminal, yet both immensely illuminating and evidently...

  8. Data characteristics that determine classifier performance

    CSIR Research Space (South Africa)

    Van der Walt, Christiaan M

    2006-11-01

    Full Text Available available at [11]. The kNN uses a LinearNN nearest neighbour search algorithm with an Euclidean distance metric [8]. The optimal k value is determined by performing 10-fold cross-validation. An optimal k value between 1 and 10 is used for Experiments 1... classifiers. 10-fold cross-validation is used to evaluate and compare the performance of the classifiers on the different data sets. 3.1. Artificial data generation Multivariate Gaussian distributions are used to generate artificial data sets. We use d...

  9. $t\\bar{t}H$ Coupling Measurement with the ATLAS Detector at the LHC

    CERN Document Server

    Hadef, Asma; The ATLAS collaboration

    2017-01-01

    The Higgs boson was discovered on the 4th of July 2012 with a mass around 125 GeV$/c^2$ by ATLAS and CMS experiments at LHC. Determining the Higgs properties (production and decay modes, couplings,...) is an important part of the high-energy physics programme in this decade. A search for the Higgs boson production in association with a top quark pair ($t\\bar{t}H$) at ATLAS is presented in this paper at an unexplored center-of-mass energy of 13 TeV, which could allow a first direct measurement of the top quark Yukawa coupling and could reveal new physics. The $t\\bar{t}H$ analysis in ATLAS is divided into 3 channels according to the Higgs decay modes: $H\\rightarrow$ Hadrons, $H\\rightarrow$ Leptons and $H\\rightarrow$ Photons. The best-fit value of the ratio of observed and Standard Model cross sections of \\ttH production process, using 2015-2016 data and combining all $t\\bar{t}H$ final states, is $1.8 \\pm 0.7$, corresponds to $2.8 \\sigma$ ($1.8 \\sigma$) observed (expected) significance.

  10. Global regulator SATB1 recruits beta-catenin and regulates T(H2 differentiation in Wnt-dependent manner.

    Directory of Open Access Journals (Sweden)

    Dimple Notani

    2010-01-01

    Full Text Available In vertebrates, the conserved Wnt signalling cascade promotes the stabilization and nuclear accumulation of beta-catenin, which then associates with the lymphoid enhancer factor/T cell factor proteins (LEF/TCFs to activate target genes. Wnt/beta -catenin signalling is essential for T cell development and differentiation. Here we show that special AT-rich binding protein 1 (SATB1, the T lineage-enriched chromatin organizer and global regulator, interacts with beta-catenin and recruits it to SATB1's genomic binding sites. Gene expression profiling revealed that the genes repressed by SATB1 are upregulated upon Wnt signalling. Competition between SATB1 and TCF affects the transcription of TCF-regulated genes upon beta-catenin signalling. GATA-3 is a T helper type 2 (T(H2 specific transcription factor that regulates production of T(H2 cytokines and functions as T(H2 lineage determinant. SATB1 positively regulated GATA-3 and siRNA-mediated knockdown of SATB1 downregulated GATA-3 expression in differentiating human CD4(+ T cells, suggesting that SATB1 influences T(H2 lineage commitment by reprogramming gene expression. In the presence of Dickkopf 1 (Dkk1, an inhibitor of Wnt signalling, GATA-3 is downregulated and the expression of signature T(H2 cytokines such as IL-4, IL-10, and IL-13 is reduced, indicating that Wnt signalling is essential for T(H2 differentiation. Knockdown of beta-catenin also produced similar results, confirming the role of Wnt/beta-catenin signalling in T(H2 differentiation. Furthermore, chromatin immunoprecipitation analysis revealed that SATB1 recruits beta-catenin and p300 acetyltransferase on GATA-3 promoter in differentiating T(H2 cells in a Wnt-dependent manner. SATB1 coordinates T(H2 lineage commitment by reprogramming gene expression. The SATB1:beta-catenin complex activates a number of SATB1 regulated genes, and hence this study has potential to find novel Wnt responsive genes. These results demonstrate that SATB1

  11. Simulation and Measurement of the Transmission Distortions of the Digital Television DVB-T/H Part 2: Hierarchical Modulation Performance

    Directory of Open Access Journals (Sweden)

    R. Stukavec

    2010-09-01

    Full Text Available The paper deals with the second part of results of the Czech Science Foundation research project that was aimed into the simulation and measurement of the transmission distortions of the digital terrestrial television according to DVB-T/H standards. In this part the hierarchical modulation performance characteristics and its simulation and laboratory measurements are presented. The paper deals with the hierarchical oriented COFDM modulator for the digital terrestrial television transmission and DVB-T/H standards and possible utilization of this technique in real broadcasting scenarios – fixed, portable and mobile digital TV, all in one TV channel. Impact of the hierarchical modulation on Modulation Error Rate from I/Q constellations and Bit Error Rates before and after Viterbi decoding in DVB-T/H signal decoding are evaluated and discussed.

  12. A review of MAAP4 code structure and core T/H model

    International Nuclear Information System (INIS)

    Song, Yong Mann; Park, Soo Yong

    1998-03-01

    The modular accident analysis program (MAAP) version 4 is a computer code that can simulate the response of LWR plants during severe accident sequences and includes models for all of the important phenomena which might occur during accident sequences. In this report, MAAP4 code structure and core thermal hydraulic (T/H) model which models the T/H behavior of the reactor core and the response of core components during all accident phases involving degraded cores are specifically reviewed and then reorganized. This reorganization is performed via getting the related models together under each topic whose contents and order are same with other two reports for MELCOR and SCDAP/RELAP5 to be simultaneously published. Major purpose of the report is to provide information about the characteristics of MAAP4 core T/H models for an integrated severe accident computer code development being performed under the one of on-going mid/long-term nuclear developing project. The basic characteristics of the new integrated severe accident code includes: 1) Flexible simulation capability of primary side, secondary side, and the containment under severe accident conditions, 2) Detailed plant simulation, 3) Convenient user-interfaces, 4) Highly modularization for easy maintenance/improvement, and 5) State-of-the-art model selection. In conclusion, MAAP4 code has appeared to be superior for 3) and 4) items but to be somewhat inferior for 1) and 2) items. For item 5), more efforts should be made in the future to compare separated models in detail with not only other codes but also recent world-wide work. (author). 17 refs., 1 tab., 12 figs

  13. IL-23 and T(H)17-mediated inflammation in human allergic contact dermatitis

    DEFF Research Database (Denmark)

    Larsen, Jeppe Madura; Bonefeld, Charlotte Menné; Poulsen, Steen Seier

    2009-01-01

    . OBJECTIVE: To investigate T(H)17-mediated inflammation in human beings with allergic contact dermatitis; in particular, the innate response of keratinocytes to contact allergen, the induction of allergen-specific T(H)17 cells, and the presence of T(H)17-related effector cells in inflamed skin. METHODS....... CONCLUSION: Our results demonstrate the involvement of T(H)17-mediated immunopathology in human allergic contact dermatitis, including both innate and adaptive immune responses to contact allergens....

  14. Apparatus and method for determining characteristics of subsurface formations

    International Nuclear Information System (INIS)

    Coates, G.R.

    1978-01-01

    A method for the determination of a composite parameter of the formation water in formations surrounding a borehole using capture cross section data (or the conductivity) of the formation water is described and its use for the accurate determination of characteristics such as water saturation even in shaly regions, is demonstrated. (UK)

  15. 4"t"h Annual workshop proceedings of the collaborative project ''Redox phenomena controlling systems'' (7"t"h EC FP CP RECOSY)

    International Nuclear Information System (INIS)

    Altmaier, Marcus; Kienzler, Bernhard; Duro, Lara; Grive, Mireia; Montoya, Vanessa

    2012-01-01

    The EURATOM 7"t"h EC Framework Program Collaborative Project REdox phenomena Controlling SYstems (RECOSY) started in April 2008 and extends over 4 years. Although redox is not a new geochemical issue, different questions are still not resolved. For this reason, main objectives of RECOSY project are a) the sound understanding of redox phenomena controlling the long-term release/retention of radionuclides in nuclear waste disposal, b) providing tools to apply the result to Performance Assessment/Safety Case, c) training of next generation and d) documentation and communication of the results. To this aim, the project set up a consortium of 32 Beneficiaries/Contractors and 6 Associated Groups. The consortium includes key European Research Institutes, Universities, National Waste Management Agencies and SMEs, from 13 EURATOM signatory states, Russia, Japan, Korea, USA and one European Joint Research Centre. The ReCosy concept is innovative in the scientific approach to the redox phenomena. It includes i) advanced analytical tools, ii) investigations of processes responsible for redox control (thermodynamically and kinetically controlled processes, surface reactions and microbial processes,..), iii) provision of required data on redox controlling processes, and iv) response to disturbances in disposal systems. The work program is structured along six RTD workpackages (WP1-6). They cover near-field and far field aspects as well as all relevant host-rocks considered in Europe. In WP1, the scientific state-of-the-art and its application to Performance Assessment/Safety Case is documented and regularly updated. WP2 focuses on development of redox determination methods. WP3 focuses on redox response of defined and near-natural systems. WP4 studies the redox reactions of radionuclides. WP5 focuses on Redox processes in radionuclide transport and WP6 deals with redox reactions affecting the spent fuel source-term. Specific workpackages on knowledge management, education and

  16. Determination of weld defect characteristics using focused probes

    International Nuclear Information System (INIS)

    Saglio, Robert; Touffait, A.-M.; Prot, A.-C.

    1977-01-01

    A method is described which allows, by means of an experimentally discovered law, the determination of the geometrical characteristics of the detected defects. This determination is based on the properties of focused probes, and particularly on what is called their 'effective ultrasonic beam'. The main result is the ability to describe a defect with a given and known accuracy. Examples are given which show practical applications of the method [fr

  17. Determination of Urban Thermal Characteristics on an Urban/Rural ...

    African Journals Online (AJOL)

    Determination of Urban Thermal Characteristics on an Urban/Rural Land Cover Gradient Using Remotely Sensed Data. ... an urbanization process and the urban heat island (UHI) phenomenon is known to significantly compromise urban environmental quality and has been linked to climate change and associated impacts.

  18. Determination and characteristics of the terrain heigth movements

    Directory of Open Access Journals (Sweden)

    Sütti Juraj

    1998-06-01

    Full Text Available To determine vertical movements of the earth crust, a kinematic processing model was developed by repeatedly levelling measured heights of the earth’s surface. From this model, applying a free adjustment , the primary vertical displacement is measured as rates of the height changes and annual velocities can be so obtained. In addition, other characteristics for the height movements and the “deformed“ topographic surface in the measured region should be derived. The visualisation of the movement and deformation characteristics using convenient map forms are considered useful.

  19. Determinants of the most significant characteristics of reproductive health

    Directory of Open Access Journals (Sweden)

    Miljković Snežana

    2010-01-01

    Full Text Available Introduction. Reproductive health of women is determined by females’ demographic and socio-economic characteristics, their behavior, and the complex of environmental factors. Objective. The paper examines the predictive impact of personal and environmental characteristics, health and healthcare characteristics regarding the most important aspects of reproductive health. Methods From a sample of 2,718 women, aged 20-49 years, we collected information on various characteristics using a structured questionnaire. Based on factorial analysis (principal components method, Kaisser Varimax criterion we selected representative variables (factors, describing personal (demographic and socio-economic characteristics of women, their environment (family, household, community, health (attitudes towards health, life-style, health status, healthcare (independent and the characteristics of reproductive health (dependent variables. The predictors were analyzed by multiple regression and correlation. Results. Sexual behavior was determined by socio-economic status, personal tidiness, rest, presence of risk factor(s, health evaluation and attitude toward personal responsibility, trust in physicians etc. The predictors of contraception involved satisfaction with one’s own health, serious health problems, health evaluation. The presence and number of abortions were determined by personal psychological maturity, rest, risk factors, life-style, health evaluation and its manifestations, and the continuity and timely healthcare. The predictors of adequate protection of reproductive health involved the cultural level of the community, financial standing of the household, satisfaction with one’s own life, tidiness and rest, presence of risk factors, health evaluation, attitude towards personal responsibility, and trust in physicians. HIV control was determined by satisfaction with one’s own life, physical activity of women, presence of serious health problems, and

  20. Determination of beam characteristic parameters for a linear accelerator

    International Nuclear Information System (INIS)

    Lima, D.A. de.

    1978-01-01

    A mechanism to determine electron beam characteristic parameters of a linear accelerator was constructed. The mechanism consists in an electro-calorimeter and an accurate optical densitometer. The following parameters: mean power, mean current, mean energy/particle, pulse Width, pulse amplitude dispersion, and pulse frequency, operating the 2 MeV linear accelerator of CBPF (Brazilian Center pf Physics Researches). The optical isodensity curves of irradiated glass lamellae were obtained, providing information about focus degradation penetration direction in material and the reach of particle. The point to point dose distribution in the material from optical density curves were obtained, using a semi empirical and approached model. (M.C.K.) [pt

  1. Determination and Scaling of Thermo Acoustic Characteristics of Premixed Flames

    Directory of Open Access Journals (Sweden)

    P. R. Alemela

    2010-06-01

    Full Text Available The paper investigates the determination and the scaling of thermo acoustical characteristics of lean premixed flames as used in gas turbine combustion systems. In the first part, alternative methods to characterize experimentally the flame dynamics are outlined and are compared on the example of a scaled model of an industrial gas turbine burner. Transfer matrix results from the most general direct method are contrasted with data obtained from the hybrid method, which is based on Rankine-Hugoniot relations and the experimental flame transfer function obtained from OH*-chemiluminescence measurements. Also the new network model based regression method is assessed, which is based on a n – τ – σ dynamic flame model. The results indicate very good consistency between the three techniques, providing a global check of the methods/tools used for analyzing the thermo acoustic mechanisms of flames. In the second part, scaling rules are developed that allow to calculate the dynamic flame characteristics at different operation points. Towards this a geometric flame length model is formulated. Together with the other operational data of the flame it provides the dynamic flame model parameters at these points. The comparison between the measured and modeled flame lengths as well as the n – τ – σ parameters shows an excellent agreement.

  2. Possibility analysis of combustion of torrefied biomass in 140 t/h PC boiler

    Directory of Open Access Journals (Sweden)

    Jagodzińska Katarzyna

    2016-01-01

    Full Text Available The study attempts to evaluate the impact of combustion of torrefied willow (Latin: Salix viminalis and palm kernel shell (Latin: Elaeis guineensis on the heat exchange in a 140 t/h PC boiler through an analysis of 6 cases for different boiler loads (60 %, 75 % and 100 % and a comparison with coal combustion. The analysis is premised on a 0-dimensional model based on the method presented in [15, 16, 17] and long-standing experimental measurements. Inter alia, the following results are presented: the temperature distribution of flue gases and the working medium (water/steam in characteristic points of the boiler as well as heat transfer coefficients for each element thereof. The temperature distribution of both fluids and the heat transfer coefficients are similar for all analysed fuels for each boiler load. However, the flue gas temperature at the outlet is higher in the case of torrefied biomass combustion. Due to that, there is an increase in the stack loss, which involves a decrease in the boiler efficiency. The conclusion is that torrefied biomass combustion is possible in a PC boiler without the need to change the boiler construction. However, it would be less effective than coal combustion.

  3. DETERMINATION OF CHARACTERISTICS OF THROTTLING DEVICE FOR PNEUMATIC SPRING

    Directory of Open Access Journals (Sweden)

    O. H. Reidemeister

    2018-02-01

    variation of the pressure difference in the pneumatic cylinder and the auxiliary reservoir of the pneumatic suspension system. Also, the work proposes a method to determine the dependence of the working medium on the capacity of the throttling device and its geometric features. Practical value. The ability to predict the operating parameters of the pneumatic system depending on the pneumatic resistance of the throttling device will improve the car running characteristics, increase the comfort of passenger transport, and also reduce the wear of the rolling stock and track gauge due to vehicle-track interaction.

  4. Characteristics and determinants of ambient fungal spores in Hualien, Taiwan

    Science.gov (United States)

    Ho, Hsiao-Man; Rao, Carol Y.; Hsu, Hsiao-Hsien; Chiu, Yueh-Hsiu; Liu, Chi-Ming; Chao, H. Jasmine

    Characteristics and determinants of ambient aeroallergens are of much concern in recent years because of the apparent health impacts of allergens. Yet relatively little is known about the complex behaviors of ambient aeroallergens. To address this issue, we monitored ambient fungal spores in Hualien, Taiwan from 1993-1996 to examine the compositions and temporal variations of fungi, and to evaluate possible determinants. We used a Burkard seven-day volumetric spore trap to collect daily fungal spores. Air pollutants, meteorological factors, and Asian dust events were included in the statistical analyses to predict fungal levels. We found that the most dominant fungal categories were ascospores, followed by Cladosporium and Aspergillus/Penicillium. The majority of the fungal categories had significant diurnal and seasonal variations. Total fungi, Cladosporium, Ganoderma, Arthrinium/Papularia, Cercospora, Periconia, Alternaria, Botrytis, and PM 10 had significantly higher concentrations ( p<0.05) during the period affected by Asian dust events. In multiple regression models, we found that temperature was consistently and positively associated with fungal concentrations. Other factors correlated with fungal concentrations included ozone, particulate matters with an aerodynamic diameter less than 10 μm (PM 10), relative humidity, rainfall, atmospheric pressure, total hydrocarbons, carbon monoxide, nitrogen dioxide, and sulfur dioxide. Most of the fungal categories had higher levels in 1994 than in 1995-96, probably due to urbanization of the study area. In this study, we demonstrated complicated interrelationships between fungi and air pollution/meteorological factors. In addition, long-range transport of air pollutants contributed significantly to local aeroallergen levels. Future studies should examine the health impacts of aeroallergens, as well as the synergistic/antagonistic effects of weather, and local and global-scale air pollutions.

  5. Characteristics of African Savanna Biomes for Determining Woody Cover

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: This data set includes the soil and vegetation characteristics, herbivore estimates, and precipitation measurement data for the 854 sites described and...

  6. Determination of some chemical and microbiological characteristics of Kaymak

    Directory of Open Access Journals (Sweden)

    Ökten, Sevtap

    2006-12-01

    Full Text Available Kaymak is a kind of concentrated cream, which is traditionally manufactured from buffalo or cow’s milk in Turkey. It is generally consumed with honey at breakfast and some traditional Turkish desserts. The aim of this study was to determine some chemical and microbiological properties of kaymak. The samples were obtained from different dairy plants producing kaymak from cow’s milk and local markets located in Zmir. They were examined for total solids and fat contents, acidity, pH and peroxide values, as well as counts of coliform bacteria, E. coli, yeast and moulds, and Staphylococci. Chemical characteristics of the samples were generally favorable for Turkish Food Codex. However, microbiological properties of some samples were very poor. Careful considerations should be given by the kaymak industry during manufacturing and storage of the product.Kaymak es una clase de crema concentrada, que se fabrica tradicionalmente de la leche del búfalo o de la vaca en Turquía. Se consume generalmente con la miel en el desayuno y en algunos postres turcos tradicionales. El objetivo de este estudio fue determinar algunas características químicas y microbiológicas del kaymak. Las muestras fueron obtenidas de diversas instalaciones lecheras productoras de kaymak de leche de vaca y de mercados locales situados en Zmir. Se analizó el contenido en sólidos totales y grasas, acidez, pH y valores de peróxido, además del conteo de tan bien como cuentas de las bacterias coliformes, E. coli, levadura y mohos, y estafilococos. Las características químicas de las muestras fueron generalmente aceptables para el Turkish Food Codex. Sin embargo, las características microbiológicas de algunas muestras fueron muy malas. La industria del kaymak debe ser extremadamente cuidadosa durante la fabricación y el almacenaje del producto.

  7. Germination rate is the significant characteristic determining coconut palm diversity.

    Science.gov (United States)

    Harries, Hugh C

    2012-01-01

    This review comes at a time when in vitro embryo culture techniques are being adopted for the safe exchange and cryo-conservation of coconut germplasm. In due course, laboratory procedures may replace the options that exist among standard commercial nursery germination techniques. These, in their turn, have supplanted traditional methods that are now forgotten or misunderstood. Knowledge of all germination options should help to ensure the safe regeneration of conserved material. This review outlines the many options for commercial propagation, recognizes the full significance of one particular traditional method and suggests that the diversity of modern cultivated coconut varieties has arisen because natural selection and domestic selection were associated with different rates of germination and other morphologically recognizable phenotypic characteristics. The review takes into account both the recalcitrant and the viviparous nature of the coconut. The ripe fruits that fall but do not germinate immediately and lose viability if dried for storage are contrasted with the bunches of fruit retained in the crown of the palm that may, in certain circumstances, germinate to produce seedlings high above ground level. Slow-germinating and quick-germinating coconuts have different patterns of distribution. The former predominate on tropical islands and coastlines that could be reached by floating when natural dispersal originally spread coconuts widely-but only where tides and currents were favourable-and then only to sea-level locations. Human settlers disseminated the domestic types even more widely-to otherwise inaccessible coastal sites not reached by floating-and particularly to inland and upland locations on large islands and continental land masses. This review suggests four regions where diversity has been determined by germination rates. Although recent DNA studies support these distinctions, further analyses of genetic markers related to fruit abscission and

  8. Germination rate is the significant characteristic determining coconut palm diversity

    Science.gov (United States)

    Harries, Hugh C.

    2012-01-01

    Rationale This review comes at a time when in vitro embryo culture techniques are being adopted for the safe exchange and cryo-conservation of coconut germplasm. In due course, laboratory procedures may replace the options that exist among standard commercial nursery germination techniques. These, in their turn, have supplanted traditional methods that are now forgotten or misunderstood. Knowledge of all germination options should help to ensure the safe regeneration of conserved material. Scope This review outlines the many options for commercial propagation, recognizes the full significance of one particular traditional method and suggests that the diversity of modern cultivated coconut varieties has arisen because natural selection and domestic selection were associated with different rates of germination and other morphologically recognizable phenotypic characteristics. The review takes into account both the recalcitrant and the viviparous nature of the coconut. The ripe fruits that fall but do not germinate immediately and lose viability if dried for storage are contrasted with the bunches of fruit retained in the crown of the palm that may, in certain circumstances, germinate to produce seedlings high above ground level. Significance Slow-germinating and quick-germinating coconuts have different patterns of distribution. The former predominate on tropical islands and coastlines that could be reached by floating when natural dispersal originally spread coconuts widely—but only where tides and currents were favourable—and then only to sea-level locations. Human settlers disseminated the domestic types even more widely—to otherwise inaccessible coastal sites not reached by floating—and particularly to inland and upland locations on large islands and continental land masses. This review suggests four regions where diversity has been determined by germination rates. Although recent DNA studies support these distinctions, further analyses of genetic markers

  9. Resistance of activated human T(h)2 cells to NO-induced apoptosis is mediated by gamma-glutamyltranspeptidase

    NARCIS (Netherlands)

    Roozendaal, R; Vellenga, E; de Jong, MA; Traanberg, KF; Postma, DS; de Monchy, JGR; Kauffman, HF

    Activation-induced death of inflammatory cells (AICD) has an important function in immune maintenance, Type 1 T-h cells are known to be more susceptible to AICD than T(h)2 cells. In the current study we examined whether NO-induced apoptosis also preferentially eliminates T(h)1 cells over Th2 cells.

  10. Characteristics of African Savanna Biomes for Determining Woody Cover

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set includes the soil and vegetation characteristics, herbivore estimates, and precipitation measurement data for the 854 sites described and analyzed in...

  11. Determination of gamma radiation shielding characteristics of some tropical woods

    International Nuclear Information System (INIS)

    Aigbosuria, E. F.

    2011-01-01

    This study compares the shielding characteristics of twenty-two tropical woods by using gamma scintillation detection method. Woods sourced are Anogeisus Leiocarpus(Ayin), Nesogordonia Papverifera(Oro), Entandrophragma Microphyllum(Anunje), Brachystagia Eurycoma(Ako), Cassia Alata(Asunrun), Afzelia Africana(Apa-Igbo), Khaya Grandifoliala(Gedu), Piptadenistrum Africana(Agbonyin), Nanclea Diderrehii(Opepe), Khaya Ivorensis(Oganwo), Chlorophora Excelsa(Iroko), Masonia altissima(Odogi), Entandrophragma Angolense(Ijebo), Altium Sativum(Ayo), Albizia Zygia(Ayunre), Terminalia Superba(Afara), Cordia Millenii(Omo), Melania(Melania), Pycnanthus Angolensis(Akomu), Triplochitons Scleroxylon(Arere), Pine(Pine), Ceiba Pentradra(Araba). The intensities of the emergent radiation were measured, when each of these woods were placed between a scintillation detector and a standard radioactive source. Analysis of result obtained shows an appreciable evidence of radiation attenuation due to the changes in the chemical composition of the woods and the dependence of the attenuation coefficient on energy and densities of these woods. The descending order of attenuation coefficient determined are; Ayin, Oro, Anuje, Ako, Asunrun, Apa-igbo Gedu, Agbonyin, Opepe Oganwo, Iroko Odogi , Ayo, Ayunre, Afara, Omo, Melania, Akomu, Arere, Pine, Araba. For a constant energy of 0.101MeV, the attenuation coefficient are 0.190cm -1 , 0.165cm -1 , 0.163cm -1 , 0.156cm -1 , 0.149cm -1 , 0.143cm -1 , 0.133cm -1 , 0.132cm -1 , 0.127cm -1 , 0.124cm -1 , 0.085cm -1 , 0.123cm -1 , 0.122cm -1 , 0.113cm -1 , 0.101cm -1 , 0.088cm -1 , 0.087cm -1 , 0.086cm -1 , 0.082cm -1 respectively. The wood in descending order of dependence of attenuation coefficient on density are: Ayin,Oro, Anunje,Ako,Asunrun,Apa-Igbo, Gedu, Agbonyin, Opepe, Oganwo, Iroko, Odogi, Ijebo, Ayo, Ayunre, Afara, Omo, Melania, Akomu, Arere, Pine and Araba. The half value layer shows the thickness at various energy regions.

  12. Determination of gamma radiation shielding characteristics of some tropical woods

    Energy Technology Data Exchange (ETDEWEB)

    Aigbosuria, E F [Department of Computer Electronics/Physics, Lead City University, Ibadan (Nigeria)

    2011-10-24

    This study compares the shielding characteristics of twenty-two tropical woods by using gamma scintillation detection method. Woods sourced are Anogeisus Leiocarpus(Ayin), Nesogordonia Papverifera(Oro), Entandrophragma Microphyllum(Anunje), Brachystagia Eurycoma(Ako), Cassia Alata(Asunrun), Afzelia Africana(Apa-Igbo), Khaya Grandifoliala(Gedu), Piptadenistrum Africana(Agbonyin), Nanclea Diderrehii(Opepe), Khaya Ivorensis(Oganwo), Chlorophora Excelsa(Iroko), Masonia altissima(Odogi), Entandrophragma Angolense(Ijebo), Altium Sativum(Ayo), Albizia Zygia(Ayunre), Terminalia Superba(Afara), Cordia Millenii(Omo), Melania(Melania), Pycnanthus Angolensis(Akomu), Triplochitons Scleroxylon(Arere), Pine(Pine), Ceiba Pentradra(Araba). The intensities of the emergent radiation were measured, when each of these woods were placed between a scintillation detector and a standard radioactive source. Analysis of result obtained shows an appreciable evidence of radiation attenuation due to the changes in the chemical composition of the woods and the dependence of the attenuation coefficient on energy and densities of these woods. The descending order of attenuation coefficient determined are; Ayin, Oro, Anuje, Ako, Asunrun, Apa-igbo Gedu, Agbonyin, Opepe Oganwo, Iroko Odogi , Ayo, Ayunre, Afara, Omo, Melania, Akomu, Arere, Pine, Araba. For a constant energy of 0.101MeV, the attenuation coefficient are 0.190cm{sup -1}, 0.165cm{sup -1}, 0.163cm{sup -1}, 0.156cm{sup -1}, 0.149cm{sup -1}, 0.143cm{sup -1}, 0.133cm{sup -1}, 0.132cm{sup -1}, 0.127cm{sup -1}, 0.124cm{sup -1}, 0.085cm{sup -1}, 0.123cm{sup -1}, 0.122cm{sup -1}, 0.113cm{sup -1}, 0.101cm{sup -1}, 0.088cm{sup -1}, 0.087cm{sup -1}, 0.086cm{sup -1}, 0.082cm{sup -1} respectively. The wood in descending order of dependence of attenuation coefficient on density are: Ayin,Oro, Anunje,Ako,Asunrun,Apa-Igbo, Gedu, Agbonyin, Opepe, Oganwo, Iroko, Odogi, Ijebo, Ayo, Ayunre, Afara, Omo, Melania, Akomu, Arere, Pine and Araba. The half value

  13. Job characteristics as determinants of job satisfaction and labour mobility

    OpenAIRE

    Cornelißen, Thomas

    2006-01-01

    This paper investigates the effects of detailed job characteristics on job satisfaction, job search and quits using data from the German Socio-Economic Panel (GSOEP) in a fixed effects framework. Using a factor analysis, seventeen job characteristics are reduced to seven factors that describe different aspects of a job, which are qualified as status, physical strain, autonomy, advancement opportunities, social relations at the work place, work time and job security. The effects of these facto...

  14. METHODOLOGICAL FUNDAMENTALS OF DETERMINATION OF UNPOWERED ROLLING STOCK MAINTENANCE CHARACTERISTICS

    Directory of Open Access Journals (Sweden)

    L. A. Muradian

    2016-02-01

    Full Text Available Purpose. The paper involves: 1 confirmation of the technical characteristics of cars and their modifications, as well as indicators of unfailing work probability during the time between overhauls or service hours; 2 improving the methodological approaches to assess the maintenance characteristics of new and modernized equipment of rail transport on the example of not self-propelled rolling stock, namely, railway freight cars; 3 solution of scientific and applied problems in assessment the maintenance characteristics of the new and modernized railway equipment. Methodology. The basic methodological approaches to the assessment of the maintenance characteristics on the example of not self-propelled rolling stock, namely, railway freight cars were considered. The analysis of the reliability of the car, which is considered as a complex mechanical system, where all system elements are connected in series, wherein each element includes m is serially connected parts. The failure of each part of the calculation will result in refusal of the car. Thus, the car is a system without redundancy. Findings. The evaluation technic of the maintenance characteristics of freight cars in controlled operation with taking into account the features of the new generation of cars was improved. Specified: the duration of the tests, the frequency of inspection of the control group of cars controlled by the parameters of the car, the reasons for the early termination of controlled operation. Identified failures in the process of controlled operation are divided according to their nature. Originality. The authors proposed a method of assessing the maintenance characteristics of railway equipment in trial operation as an example of a new generation of freight cars. Practical value. The results allow assessing the maintenance characteristics of new and modernized rail transport equipment during the maintenance test.

  15. Dynamic characteristics of rocks and method of their determine

    OpenAIRE

    Radoslav Schügerl

    2009-01-01

    This paper presents selected problems of the research of the influence of technical vibrations on rocks. The vibrations are the products of the technological procedure, such as mining blasting, ramming of the piles, using of the drilling-equipment or vibration machines. The vibrations could be also evocated by road or train traffic. The most important dynamic characteristics of rocks are dynamic modulus of elasticity Edyn; dynamic modulus of deformation Edef, dyn; dynamic shear-modulus Gdyn; ...

  16. Subjective Outcome Evaluation of the Project P.A.T.H.S. (Secondary 2 Program: Views of the Program Participants

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2009-01-01

    Full Text Available A total of 196 secondary schools participated in the Secondary 2 Program of the Full Implementation Phase of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes. After completion of the Tier 1 Program, 30,731 students responded to the Subjective Outcome Evaluation Form (Form A to assess their perceptions of the program, instructors, and perceived effectiveness of the program. Based on the consolidated reports submitted by the schools to the funding body, the research team aggregated the consolidated data to form a “reconstructed” overall profile on the perceptions of the program participants. Findings demonstrated that high proportions of the respondents had positive perceptions of the program and the instructors, and roughly four-fifths of the respondents regarded the program as beneficial to them. Correlation analyses showed that perceived program and instructor characteristics were positively associated with perceived benefits of the program.

  17. Determination of the mechanical characteristics of nanomaterials under tension and compression

    Science.gov (United States)

    Filippov, A. A.; Fomin, V. M.

    2018-04-01

    In this paper, new method for determining the mechanical characteristics of nanoparticles in a heterogeneous mixture is proposed. The heterogeneous mixture consists of a thermosetting epoxy resin and silicon dioxide powder of different dispersity. The mechanical characteristics of such a material at a constant concentration for nanopowder are experimentally determined. Using existing formulas for obtaining effective characteristics, the Lame coefficients for nanoparticles of various sizes are calculated. The dependence of the elastic characteristics on the particle size is obtained.

  18. Intraperitoneal fluid collection: CT characteristics in determining the causes

    International Nuclear Information System (INIS)

    Kim, Mi Young; Suh, Chang Hae; Chung, Won Kyun; Kim, Chong Soo; Choi, Ki Chul

    1995-01-01

    Abdominal CT scans in patients with intraperitoneal fluid were retrospectively studied to identify characteristic features useful for differential diagnosis of various causes. One hundred and seventy patients with intraperitoneal fluid collection were classified as categories of hepatic disease, carcinomatosis, and infectious disease. We analyzed sites of fluid collection, the presence of peritoneal thickening, omental and mesenteric fat infiltration, and lymph node enlargement. Intraperitoneal fluid was present in subhepatic space, subphrenic space, paracolic gutter, mesentery, and fossa of the gallbladder in decreasing order of frequency. Fluid in the gallbladder fossa was the most frequent in hepatic disease. The fluid collection in subhepatic and subphrenic space was less frequent in infectious disease. Peritoneal thickening was noted in infectious diseases, and carcinomatosis. Omental fat infiltration and enlarged lymph nodes were the most frequent in carcinomatosis (58% and 44%, respectively), whereas, mesenteric fat infiltration and enlarged lymph nodes were the most common in infectious diseases (61%, and 26%, respectively). The location of peritoneal fluid collection showed some lesion specific characteristics, and CT features of fat infiltration and enlarged lymph nodes of peritoneum, omentum, and mesentery were helpful for differential diagnosis between carcinomatosis and infectious diseases

  19. Building characteristics that determine moisture in 105 Danish homes

    DEFF Research Database (Denmark)

    Knudsen, Sofie; Møller, Eva B.; Bräuner, Elvira

    2014-01-01

    location, clothes drying indoors, lack of mechanical ventilation, high social status and spending more time indoors significantly increased the risk of indoor dampness. The variables associated with increased risk of dampness varied according to the method used to determine dampness. Measurements in air...... reflected short term variations in occupant behavior and measurement in material reflected building construction and longer term occupant habits....

  20. Characteristics and Determinants of Youth Unemployment in Ethiopia

    African Journals Online (AJOL)

    Youth unemployment is a serious concern to policy makers in many developing countries because of its multidimensional impact. In this connection, the paper attempts to characterize youth unemployment in Ethiopia and reveal its major determinants. Univariate results indicate that the youth in general, including teenager ...

  1. Raman Spectral Determination of Chemical Reaction Rate Characteristics

    Science.gov (United States)

    Balakhnina, I. A.; Brandt, N. N.; Mankova, A. A.; Chikishev, A. Yu.; Shpachenko, I. G.

    2017-09-01

    The feasibility of using Raman spectroscopy to determine chemical reaction rates and activation energies has been demonstrated for the saponification of ethyl acetate. The temperature dependence of the reaction rate was found in the range from 15 to 45°C.

  2. Determination of hydraulic characteristics of an aquifer capacity from ...

    African Journals Online (AJOL)

    Constant rate, single well pumping tests were conducted using boreholes located in four communities in the study area with the aim of determining the aquifer hydraulic properties using the Cooper Jacob method. Fractured shales yielded groundwater into the wells whose depths ranged from 26 to 35m while the static water ...

  3. The Determination of the Asynchronous Traction Motor Characteristics of Locomotive

    Directory of Open Access Journals (Sweden)

    Pavel Grigorievich Kolpakhchyan

    2017-01-01

    Full Text Available The article deals with the problem of the locomotive asynchronous traction motor control with the AC diesel-electric transmission. The limitations of the torque of the traction motor when powered by the inverter are determined. The recommendations to improve the use of asynchronous traction motor of locomotives with the AC diesel-electric transmission are given.

  4. Determine Entrepreneurial Characteristics Using Mobile Android Game Freezer

    Directory of Open Access Journals (Sweden)

    Mohammad Ismail

    2018-01-01

    Full Text Available Psychometric Test has been used as an individual trait measurement for a long time for both experienced entrepreneurs as well as young generation who are looking for their potential in entrepreneurship. The assessment and measurement of strength and weaknesses of key entrepreneurial traits provides the entrepreneurial level and personal development planning for entrepreneur or those who want to venture into business. However, the traditional psychometric test lacks of fun element which is less enjoyable activity during answering the test. Furthermore, it requires basic understanding of business jargon that difficult for certain respondents to provide accurate respond. The purpose of this study is to propose a gamification approach which is mobile game application called ‘Freezer’ that can measured entrepreneurial traits of the player. In this sense, ‘Freezer’ creates a simulated scenario for respondents to play as an ice cream business owner and to win as a successful business person, each action done will be measured as entrepreneurial traits criteria. At the end of the game, the result will be presented that can describe the entrepreneurial characteristics of the individuals based on their planning and activities during playing the game.  

  5. Neutronics comparisons of d-Li and t-H2O neutron sources

    International Nuclear Information System (INIS)

    Doran, D.G.; Cierjacks, S.; Mann, F.M.; Greenwood, L.R.; Daum, E.

    1995-01-01

    Calculations were performed to compare the neutronics of two neutron source concepts which are candidates for an international fusion materials irradiation facility (IFMIF). One concept, d-Li, produces neutrons by stopping 35 MeV deuterons in a flowing lithium target. Criticism of this concept because of the high energy tail above 14 MeV gave rise to the t-H 2 O concept proposed by Cierjacks. It would generate neutrons below 14.6 MeV ( 2 O. Test volumes that met certain damage parameter criteria were estimated. Because of the softer spectra and somewhat lower yields for t-H 2 O, the d-Li concept was found to have a test volume advantage of a factor of 2 or more, depending on the material to be irradiated. ((orig.))

  6. Uncertainty reevaluation of T/H parameters of HANARO core design

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hark Rho; Park, Cheol; Kim, Heo Nil; Chae, Hee Taek

    1999-03-01

    HANARO core was designed by statistical thermal design method which was generally applied to power plant design. However, reevaluation of core thermal margin reflecting design changes as well as experiences through commissioning and operation is necessary for safe operation of reactor. For this objective, the revision of data for T/H design parameters and the reevaluation of their uncertainties were performed. (Author). 30 refs., 7 figs.

  7. Implementing a DVB-T/H Receiver on a Software-Defined Radio Platform

    Directory of Open Access Journals (Sweden)

    Yong Jiang

    2009-01-01

    Full Text Available Digital multimedia broadcasting is available in more and more countries with various forms. One of the most successful forms is Digital Video Broadcasting for Terrestrial (DVB-T, which has been deployed in most countries of the world for years. In order to bring the digital multimedia broadcasting services to battery-powered handheld receivers in a mobile environment, Digital Video Broadcasting for Handheld (DVB-H has been formally adopted by ETSI. More advanced and complex digital multimedia broadcasting systems are under development, for example, the next generation of DVB-T, a.k.a. DVB-T2. Current commercial DVB-T/H receivers are usually built upon dedicated application-specific integrated circuits (ASICs. However, ASICs are not flexible for incoming evolved standards and less overall-area efficient since they cannot be efficiently reused and shared among different radio standards, when we integrate a DVB-T/H receiver into a mobile phone. This paper presents an example implementation of a DVB-T/H receiver on the prototype of Infineon Technologies' Software-Defined Radio (SDR platform called MuSIC (Multiple SIMD Cores, which is a DSP-centered and accelerator-assisted architecture and aims at battery-powered mass-market handheld terminals.

  8. Development of steam generators for combustion of biofuels up to 10 t/h

    Energy Technology Data Exchange (ETDEWEB)

    Bentzin, H

    1985-01-01

    Combustion parameters are compared for raw brown coal, rice hulls and coconut shells as fuel in small steam generators. Combustion of native biofuel is seen as a power generation alternative in developing countries. Experiments were conducted on a 6.5 t/h moving grate steam generator with a firing grate surface of 7.2 m/sup 2/. Combustion results are shown in a table. Technological modifications carried out in adapting brown coal-fired steam generators to biofuels are also listed. A series of small steam generators for combustion of brown coal, biofuels including wood chips, as well as heating oil as back-up has been developed by the Karl-Marx-Stadt Dampfkesselbau Plant, GDR, with steam capacities ranging from 3.2 to 10 t/h. Technical specifications and diagrams of this series design (DGK-3, DGK-45, DWK 2S) are given. A larger steam generator with 20 t/h steam capacity for combustion of raw brown coal, bagasse, wood chips with heating oil and for rice hulls as support fuels is being developed by the Berlin Dampferzeugerbau Plant, GDR. 5 references.

  9. Interim Evaluation of the Project P.A.T.H.S.: Findings Based on Different Datasets

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2012-01-01

    Full Text Available Interim evaluation studies were carried out in order to examine the implementation details of the Tier 1 Program of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes in Hong Kong. Quantitative results of the interim evaluation findings based on eight datasets collected from 2006 to 2009 are reported in this paper. Three hundred and seventy-eight schools were randomly selected to provide information on the implementation details of the program via face-to-face interviews, telephone interviews, and self-completed questionnaires. Results showed that a majority of the workers perceived that the students had positive responses to the program and the program was helpful to the students. In conjunction with other process evaluation findings, the present study suggests that the implementation quality of the Tier 1 Program of the Project P.A.T.H.S. is high. The present study also provides support for the effectiveness of the Tier 1 Program of the Project P.A.T.H.S. in Hong Kong.

  10. Experimental determination of airplane mass and inertial characteristics

    Science.gov (United States)

    Wolowicz, C. H.; Yancey, R. B.

    1974-01-01

    Current practices are evaluated for experimentally determining airplane center of gravity, moments of inertia, and products of inertia. The techniques discussed are applicable to bodies other than airplanes. In pitching- and rolling-moment-of-inertia investigations with the airplane mounted on and pivoted about knife edges, the nonlinear spring moments that occur at large amplitudes of oscillation can be eliminated by using the proper spring configuration. The single-point suspension double-pendulum technique for obtaining yawing moments of inertia, products of inertia, and the inclination of the principal axis provides accurate results from yaw-mode oscillation data, provided that the sway-mode effects are minimized by proper suspension rig design. Rocking-mode effects in the data can be isolated.

  11. Determining characteristics of HF communications links using SuperDARN

    Directory of Open Access Journals (Sweden)

    J. M. Hughes

    2002-07-01

    Full Text Available Space weather effects can strongly influence high-frequency (HF communications by changing the ionospheric environment through which the radio waves propagate. Since many systems utilize HF communications, the ability to make real-time assessments of propagation conditions is an important part of space weather monitoring systems. In this paper, we present new techniques for measuring high-latitude HF communications link parameters using data from SuperDARN radars. These techniques use ground-scatter returns to define the variation in skip distance with frequency. From these data, the maximum usable frequency (MUF as a function of range is determined and ionospheric critical frequencies are estimated. These calculations are made in near-real-time and the results are made available on the World Wide Web. F-region critical frequencies calculated using this method show good agreement with ionosonde data.Key words. Ionosphere (active experiments; instruments and techniques – Radio science (ionospheric propagation

  12. Determining characteristics of HF communications links using SuperDARN

    Directory of Open Access Journals (Sweden)

    J. M. Hughes

    Full Text Available Space weather effects can strongly influence high-frequency (HF communications by changing the ionospheric environment through which the radio waves propagate. Since many systems utilize HF communications, the ability to make real-time assessments of propagation conditions is an important part of space weather monitoring systems. In this paper, we present new techniques for measuring high-latitude HF communications link parameters using data from SuperDARN radars. These techniques use ground-scatter returns to define the variation in skip distance with frequency. From these data, the maximum usable frequency (MUF as a function of range is determined and ionospheric critical frequencies are estimated. These calculations are made in near-real-time and the results are made available on the World Wide Web. F-region critical frequencies calculated using this method show good agreement with ionosonde data.

    Key words. Ionosphere (active experiments; instruments and techniques – Radio science (ionospheric propagation

  13. 30 CFR 18.62 - Tests to determine explosion-proof characteristics.

    Science.gov (United States)

    2010-07-01

    ... characteristics. 18.62 Section 18.62 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR... Inspections and Tests § 18.62 Tests to determine explosion-proof characteristics. (a) In testing for explosion-proof characteristics of an enclosure, it shall be filled and surrounded with various explosive mixtures...

  14. Determination of road dust loadings and chemical characteristics using resuspension.

    Science.gov (United States)

    Chen, Jianhua; Wang, Wei; Liu, Hongjie; Ren, Lihong

    2012-03-01

    The contribution of fugitive dust from traffic to air pollution can no longer be ignored in China. In order to obtain the road dust loadings and to understand the chemical characteristics of PM(10) and PM(2.5) from typical road dust, different paved roads in eight districts of Beijing were selected for dust collection during the four seasons of 2005. Ninety-eight samples from 28 roads were obtained. The samples were resuspended using equipment assembled to simulate the rising process of road dust caused by the wind or wheels in order to obtain the PM(10) and PM(2.5) filter samples. The average road dust loading was 3.82 g m(-2), with the highest of 24.22 g m(-2) being in Hutongs in the rural-urban continuum during winter. The road dust loadings on higher-grade roads were lower than those on lower-grade roads. Attention should be paid to the pollution in the rural-urban continuum areas. The sums of element abundances measured were 16.17% and 18.50% for PM(10) and PM(2.5) in road dust. The average abundances of OC and EC in PM(10) and PM(2.5) in road dust were 11.52%, 2.01% and 12.50%, 2.06%, respectively. The abundance of elements, water-soluble ions, and OC, EC in PM(10) and PM(2.5) resuspended from road dust did not change greatly with seasons and road types. The soil dust, construction dust, dust emitted from burning coal, vehicle exhaust, and deposition of particles in the air were the main sources of road dust in Beijing. Affected by the application of snow-melting agents in Beijing during winter, the amount of Cl( - ) and Na( + ) was much higher during that time than in the other seasons. This will have a certain influence on roads, bridges, vegetations, and groundwater.

  15. Building and occupant characteristics as determinants of residential energy consumption

    Energy Technology Data Exchange (ETDEWEB)

    Nieves, L.A.; Nieves, A.L.

    1981-10-01

    The major goals of the research are to gain insight into the probable effects of building energy performance standards on energy consumption; to obtain observations of actual residential energy consumption that could affirm or disaffirm comsumption estimates of the DOE 2.0A simulation model; and to investigate home owner's conservation investments and home purchase decisions. The first chapter covers the investigation of determinants of household energy consumption. The presentation begins with the underlying economic theory and its implications, and continues with a description of the data collection procedures, the formulation of variables, and then of data analysis and findings. In the second chapter the assumptions and limitations of the energy use projections generated by the DOE 2.0A model are discussed. Actual electricity data for the houses are then compared with results of the simulation. The third chapter contains information regarding households' willingness to make energy conserving investments and their ranking of various conservation features. In the final chapter conclusions and recommendations are presented with an emphasis on the policy implications of this study. (MCW)

  16. Nonlinear acoustics determination of phase characteristics of PVDF membrane hydrophones

    International Nuclear Information System (INIS)

    Bloomfield, Philip E; Lewin, Peter A; Gandhi, Gaurav

    2011-01-01

    When an ultrasonic pressure wave propagates through a nonlinear medium, the relative phasing of the generated harmonics causes a distinct asymmetry between the positive and negative pressure levels and between the rise and fall time of examined waveforms. A faithful quantitative reproduction of the source transducer's pressure field requires amplitude and phase measurements by calibrated hydrophone probes. Nonlinear hydrophone calibration provides amplitude and phase information at discrete multiples of an acoustic source's fundamental frequency. Two PVDF bilaminar membrane hydrophones were first calibrated in terms of their amplitude sensitivity to the pressure levels generated by two different HIFU (High Intensity Focused Ultrasound) circular source transducers operating at 5 MHz and 10 MHz, enabling phase studies up to 105 and 100 MHz, respectively. Introducing two newly-developed phase-dispersion representations, the phase responses of the two membrane hydrophones were determined with respect to the phase of the complex frequency response extracted from the nonlinear field simulated by a semi-empirical computer model which predicts the near and the far field pressure distributions. These phase differences compared favorably with the results obtained from the commercially available PiezoCAD simulation model. The protocol for specifying the complex pressure field of source transducers through measurements using the calibrated hydrophones is described. The results obtained indicate that the membranes exhibit close to linear decay of phase against the frequency.

  17. Nonlinear acoustics determination of phase characteristics of PVDF membrane hydrophones

    Energy Technology Data Exchange (ETDEWEB)

    Bloomfield, Philip E; Lewin, Peter A; Gandhi, Gaurav, E-mail: bloomfpe@drexel.edu [Drexel University School of Biomedical Engineering, Science, and Health Systems, Philadelphia, PA 19104-2875 (United States)

    2011-02-01

    When an ultrasonic pressure wave propagates through a nonlinear medium, the relative phasing of the generated harmonics causes a distinct asymmetry between the positive and negative pressure levels and between the rise and fall time of examined waveforms. A faithful quantitative reproduction of the source transducer's pressure field requires amplitude and phase measurements by calibrated hydrophone probes. Nonlinear hydrophone calibration provides amplitude and phase information at discrete multiples of an acoustic source's fundamental frequency. Two PVDF bilaminar membrane hydrophones were first calibrated in terms of their amplitude sensitivity to the pressure levels generated by two different HIFU (High Intensity Focused Ultrasound) circular source transducers operating at 5 MHz and 10 MHz, enabling phase studies up to 105 and 100 MHz, respectively. Introducing two newly-developed phase-dispersion representations, the phase responses of the two membrane hydrophones were determined with respect to the phase of the complex frequency response extracted from the nonlinear field simulated by a semi-empirical computer model which predicts the near and the far field pressure distributions. These phase differences compared favorably with the results obtained from the commercially available PiezoCAD simulation model. The protocol for specifying the complex pressure field of source transducers through measurements using the calibrated hydrophones is described. The results obtained indicate that the membranes exhibit close to linear decay of phase against the frequency.

  18. Nonlinear acoustics determination of phase characteristics of PVDF membrane hydrophones

    Science.gov (United States)

    Bloomfield, Philip E.; Gandhi, Gaurav; Lewin, Peter A.

    2011-02-01

    When an ultrasonic pressure wave propagates through a nonlinear medium, the relative phasing of the generated harmonics causes a distinct asymmetry between the positive and negative pressure levels and between the rise and fall time of examined waveforms. A faithful quantitative reproduction of the source transducer's pressure field requires amplitude and phase measurements by calibrated hydrophone probes. Nonlinear hydrophone calibration provides amplitude and phase information at discrete multiples of an acoustic source's fundamental frequency. Two PVDF bilaminar membrane hydrophones were first calibrated in terms of their amplitude sensitivity to the pressure levels generated by two different HIFU (High Intensity Focused Ultrasound) circular source transducers operating at 5 MHz and 10 MHz, enabling phase studies up to 105 and 100 MHz, respectively. Introducing two newly-developed phase-dispersion representations, the phase responses of the two membrane hydrophones were determined with respect to the phase of the complex frequency response extracted from the nonlinear field simulated by a semi-empirical computer model which predicts the near and the far field pressure distributions. These phase differences compared favorably with the results obtained from the commercially available PiezoCAD simulation model. The protocol for specifying the complex pressure field of source transducers through measurements using the calibrated hydrophones is described. The results obtained indicate that the membranes exhibit close to linear decay of phase against the frequency.

  19. Determining characteristics of oscillations of elastic spherical shell filled using semiconductor laser autodyne

    Science.gov (United States)

    Dobdin, S. Yu.; Usanov, D. A.; Skripal, A. V.

    2012-06-01

    The experimental results to determine the motion characteristics of oscillations of elastic spherical shell filled under the pneumopulse action have been presented. The required characteristics of motion were determined by analysis of the autodyne signal. The relationship between the parameters of motion of the spherical shell and the internal pressure measured using a contact tonometer has been shown.

  20. Detection of irradiation of strawberries by determining their microbial characteristics

    International Nuclear Information System (INIS)

    Tamminga, S.K.; Beumer, R.R.; Kampelmacher, E.H.

    1978-01-01

    A system was elaborated to determine whether strawberries have been irradiated, using 3 criteria, namely the number of Enterobacteriaceae, the percentage of yeasts on total microflora (or total absence of microorganisms) and the number of Pseudomonas. The higher the numbers of Enterobacteriaceae and/or Pseudomonas, the lower the probability that the strawberries have been irradiated. The higher the yeast percentage, the more the conclusion is justified that irradiation has taken place. The same holds true for total absence of microorganisms. By combining results for the 3 criteria an identification scheme was drawn up that would have led to 189 correct decisions (92.2%) on 205 samples (102 irradiated with 200krad, 103 unirradiated). In only 3 samples (1.5%) the combination of properties resembled that generally shown by the opposite group in such a way that they would have been classified in the wrong category. Some combinations of results for the 3 criteria were found in about equal numbers for both irradiated and unirradiated samples. These samples and others showing contradictory results, totalling 13 samples (6.3%), had to be placed in a separate 'intermediate' category, about which no opinion could be given. The only possibility in such cases is to investigate new samples. Sixty of the samples were investigated without the investigators knowing whether the samples had been irradiated; 56 of them would have been classified in the right category with the help of the scheme made up using the previous data; the remaining 4 had to be classified in the intermediate category. (author)

  1. Biomechanical Characteristics and Determinants of Instep Soccer Kick

    Science.gov (United States)

    Kellis, Eleftherios; Katis, Athanasios

    2007-01-01

    Good kicking technique is an important aspect of a soccer player. Therefore, understanding the biomechanics of soccer kicking is particularly important for guiding and monitoring the training process. The purpose of this review was to examine latest research findings on biomechanics of soccer kick performance and identify weaknesses of present research which deserve further attention in the future. Being a multiarticular movement, soccer kick is characterised by a proximal-to-distal motion of the lower limb segments of the kicking leg. Angular velocity is maximized first by the thigh, then by the shank and finally by the foot. This is accomplished by segmental and joint movements in multiple planes. During backswing, the thigh decelerates mainly due to a motion-dependent moment from the shank and, to a lesser extent, by activation of hip muscles. In turn, forward acceleration of the shank is accomplished through knee extensor moment as well as a motion-dependent moment from the thigh. The final speed, path and spin of the ball largely depend on the quality of foot-ball contact. Powerful kicks are achieved through a high foot velocity and coefficient of restitution. Preliminary data indicate that accurate kicks are achieved through slower kicking motion and ball speed values. Key pointsSoccer kick is achieved through segmental and joint rotations in multiple planes and via the proximal-to-distal sequence of segmental angular velocities until ball impact. The quality of ball - foot impact and the mechanical behavior of the foot are also important determinants of the final speed, path and spin of the ball.Ball speed values during the maximum instep kick range from 18 to 35 msec-1 depending on various factors, such as skill level, age, approach angle and limb dominance.The main bulk of biomechanics research examined the biomechanics of powerful kicks, mostly under laboratory conditions. A powerful kick is characterized by the achievement of maximal ball speed. However

  2. List of publications of Karlsruhe University (T.H.) and Karlsruhe Nuclear Research Centre

    International Nuclear Information System (INIS)

    1977-01-01

    This 19th volume of the list of publications compiled by Karlsruhe University (T.H.) in cooperation with Karlsruhe Nuclear Research Centre and some other institutions closely connected with the university gives the publications of the year 1976 as well as some supplements from 1975. The publications listed are books and journals, articles from journals and symposia, research reports, dissertations and theses for habilitation published by these institutions, their organs and institutes, their staff and scientific personnel, as well as patents. As a rule, theses for diplomas, newspaper articles, book reviews, internal reports and information have been left out. (orig.) [de

  3. Application of Monte Carlo method in determination of secondary characteristic X radiation in XFA

    International Nuclear Information System (INIS)

    Roubicek, P.

    1982-01-01

    Secondary characteristic radiation is excited by primary radiation from the X-ray tube and by secondary radiation of other elements so that excitations of several orders result. The Monte Carlo method was used to consider all these possibilities and the resulting flux of characteristic radiation was simulated for samples of silicate raw materials. A comparison of the results of these computations with experiments allows to determine the effect of sample preparation on the characteristic radiation flux. (M.D.)

  4. Work characteristics and determinants of job satisfaction in four age groups: university employees' point of view.

    NARCIS (Netherlands)

    Bos, J.T.; Donders, N.C.G.M.; Bouwman-Brouwer, K.M.; Gulden, J.W.J. van der

    2009-01-01

    PURPOSE: To investigate (a) differences in work characteristics and (b) determinants of job satisfaction among employees in different age groups. METHODS: A cross-sectional questionnaire was filled in by 1,112 university employees, classified into four age groups. (a) Work characteristics were

  5. The Determinants of Negative Maternal Parenting Behaviours: Maternal, Child, and Paternal Characteristics and Their Interaction

    Science.gov (United States)

    Kopala-Sibley, Daniel C.; Zuroff, David C.; Koestner, Richard

    2012-01-01

    This study tested Belsky's determinants of parenting, namely maternal characteristics, child characteristics, and contextual issues, namely the mother's perception of the husband as a father, husband, and person. Three hundred and seventy-nine mothers first investigated by Sears, Maccoby, and Levin completed a standardised interview to assess…

  6. DETERMINATION ANALYSIS OF TEMPERATURE REGIMES, FUNCTIONAL CHARACTERISTICS AND SLIDING CURVES OF A HYDRODYNAMIC CLUTCH

    Directory of Open Access Journals (Sweden)

    Božidar V Krstić

    2010-01-01

    Full Text Available Analysis of output quality of power transmitters is possible in position when characteristics are determined earlier. This is the reason why we focused on determination of these characteristics for a concrete power hydro-transmitter. This means that the investigation task primarily consisted of determination of functional characteristics, defining of the sliding curves and temperature regimes of a concrete hydrodynamic clutch. Results of velocity and pressure field investigations in the working space of this clutch, obtained by use of the same test setup, are the basis for determination and analysis of the functional characteristics, sliding curves and temperature regimes. In this work we also analyzed function of the hydrodynamic transmitter in assembly with an internal combustion engine, as well as a process of acceleration and deceleration of a vehicle with this assembly in it.

  7. Determination of dynamic characteristics of multi-layer carbon plastic structures of high-resolution scanner

    Directory of Open Access Journals (Sweden)

    В. Н. Маслей

    2017-10-01

    Full Text Available The comparative analysis results for the numerical determination of the dynamic characteristics of multi-layer carbon-fiber plates of the space vehicle scanner design by various types of finite element approximation of the physico-mechanical properties of the composite material are presented. Using the topological structure of the construction of reinforcing layers material in the plate package plane, experimental data for the elastic and mass characteristics of homogeneous carbon-fiber fibers, equivalent structural and orthotropic stiffness and elastic characteristics of the material of composite plates are determined.

  8. Publications of the University of Karlsruhe (T.H.) and the Nuclear Research Center Karlsruhe 1981

    International Nuclear Information System (INIS)

    1982-01-01

    This is the 14th volume of the joint list of publications of the University of Karlsruhe (T.H.), the Nuclear Research Center Karlsruhe and some institutions which are closely linked to the University. It contains the publications of the year 1981 as well as some addenda from 1980. Included were books and journals, journal articles and contributions from compilations, research reports, dissertations and habilitation theses which were written or published by these institutions, their bodies and institutes as well as their teachers and scientific staff, and also patents. Not included were, as a rule, diploma theses, newspaper articles, reviews, internal reports and bulletins. The list of publications from University is mainly based on entries made by the institutes and chairs; its completeness can not be granted here. (orig./RW) [de

  9. A role for interleukin-33 in T(H)2-polarized intestinal inflammation?

    DEFF Research Database (Denmark)

    Seidelin, J B; Rogler, G; Nielsen, O H

    2011-01-01

    Interleukin 33 (IL-33) is a recently discovered cytokine member of the IL-1 superfamily that is widely expressed in fixed tissue cells, including endothelial and epithelial cells. IL-33 induces helper T cells, mast cells, eosinophils, and basophils to produce type-2 cytokines through binding...... to the ST2/IL-1 receptor accessory protein complex. Recent studies have shown IL-33 to be upregulated in intestinal parasite infection and in epithelial cells and myofibroblasts in ulcerative colitis (UC). The findings point to a role for IL-33 in directing the T(H)2-type immune responses in these types...... of mucosal inflammation. As the IL-33/ST2 receptor axis can be manipulated by various blocking antibodies, this could be a potential therapeutic target in the future treatment of UC....

  10. THE ALGORITHM OF DETERMINATION OF EYE FUNDUS VESSELS BLOOD FLOW CHARACTERISTICS ON VIDEOSEQUENCE

    Directory of Open Access Journals (Sweden)

    O. V. Nedzvedz

    2018-01-01

    Full Text Available The method of determination of the dynamic characteristics like the vessel diameter change, the linear and volume blood velocities in the vessels of the eye fundus is considered. Such characteristics allow to determine blood flow changes in the microvasculature affecting the blood flow in the brain, kidneys and coronary vessels. Developed algorithm includes four stages: the video sequence stabilization, the vessels segmentation with the help of a neural network, the determination of the instantaneous velocity in the vessels based on the optical flow and the analysis of the results.

  11. Determining characteristic principal clusters in the “cluster-plus-glue-atom” model

    International Nuclear Information System (INIS)

    Du, Jinglian; Wen, Bin; 2NeT Lab, Wilfrid Laurier University, Waterloo, 75 University Ave West, Ontario N2L 3C5 (Canada))" data-affiliation=" (M2NeT Lab, Wilfrid Laurier University, Waterloo, 75 University Ave West, Ontario N2L 3C5 (Canada))" >Melnik, Roderick; Kawazoe, Yoshiyuki

    2014-01-01

    The “cluster-plus-glue-atom” model can easily describe the structure of complex metallic alloy phases. However, the biggest obstacle limiting the application of this model is that it is difficult to determine the characteristic principal cluster. In the case when interatomic force constants (IFCs) inside the cluster lead to stronger interaction than the interaction between the clusters, a new rule for determining the characteristic principal cluster in the “cluster-plus-glue-atom” model has been proposed on the basis of IFCs. To verify this new rule, the alloy phases in Cu–Zr and Al–Ni–Zr systems have been tested, and our results indicate that the present new rule for determining characteristic principal clusters is effective and reliable

  12. Bone Characteristics and Their Determinants in Adolescents and Young Adults with Early-Onset Severe Obesity.

    Science.gov (United States)

    Viljakainen, H T; Valta, H; Lipsanen-Nyman, M; Saukkonen, T; Kajantie, E; Andersson, S; Mäkitie, O

    2015-10-01

    Childhood obesity is associated with compromised bone health. We studied bone characteristics and their determinants in obese young adults. The study included 68 subjects with early-onset severe obesity and 73 normal-weight controls. Data on physical activity (PA), diet and smoking were collected. Bone characteristics were measured using peripheral QCT. The obese and control subjects were similar in age (mean 19.6 ± 2.6 years) and height but BMIs differed (39.7 and 22.6 kg/m(2)). A clustering of unhealthy lifestyles was marked: Obese subjects reported less supervised PA in childhood, adolescence and currently (p obese women, all crude bone characteristics were higher than in controls; in men, the differences were smaller. Associations of lifestyle factors with bone characteristics were tested using partial correlations. Independently of BMI, supervised PA in adolescence and alcohol consumption were related positively to bone characteristics in both groups. HEI associated positively with bone characteristics only in controls, while smoking was a positive determinant of bone characteristics only in obese subjects. The multivariate model showed that the contribution of lifestyle factors to bone characteristics was minimal compared with BMI. Early-onset obesity is accompanied by poor dietary quality, sedentary lifestyle, and more frequent smoking, but the overall contribution of these lifestyle factors to bone strength is limited. Bone strength is more likely to be compromised in men and in unloaded bone sites in subjects with early-onset severe obesity. The impact of obesity-related endocrine changes on bone characteristics need to be evaluated in future studies.

  13. determinant of psychophysiological state of sportsmen of high qualification with different emotional characteristics

    OpenAIRE

    Korobeynikova L.G.

    2011-01-01

    The purpose of the work - to study the determinants of psycho-physiological state of sportsmen of high qualification with different emotional characteristics. In experiment took part 19 highly skilled athletes involved in the Greco-Roman wrestling. The survey was carried out using a hardware-software complex psychodiagnostic "Multipsihometr-05. Determined by the emotional background of athletes according to the method A. Rukavishnikova features of visual perception and perceptual speed.

  14. determinant of psychophysiological state of sportsmen of high qualification with different emotional characteristics

    Directory of Open Access Journals (Sweden)

    Korobeynikova L.G.

    2011-04-01

    Full Text Available The purpose of the work - to study the determinants of psycho-physiological state of sportsmen of high qualification with different emotional characteristics. In experiment took part 19 highly skilled athletes involved in the Greco-Roman wrestling. The survey was carried out using a hardware-software complex psychodiagnostic "Multipsihometr-05. Determined by the emotional background of athletes according to the method A. Rukavishnikova features of visual perception and perceptual speed.

  15. Subjective Outcome Evaluation of the Project P.A.T.H.S: Descriptive Profiles and Correlates

    Directory of Open Access Journals (Sweden)

    Daniel T.L. Shek

    2010-01-01

    Full Text Available A total of 196 schools participated in the Tier 1 Program (Secondary 2 curriculum of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes in Hong Kong. After the completion of the program, 1,178 instructors completed a subjective outcome evaluation form in order to assess their views of the program, instructors, and perceived effectiveness of the program. Results showed that high proportions of the instructors had positive perceptions of the program (range: 76.79–93.69% and their own performance (range: 83.20–98.60%, and most of the respondents (range: 78.45–92.43% regarded the program as helpful to the program participants. While the ratings in some items in the present findings were relatively better than those in the Experimental Implementation Phase, they were similar to those based on the Secondary 1 curriculum. Consistent with previous studies, the ratings on the program, instructors, and perceived effectiveness were significantly correlated.

  16. Determining the magnetically nonlinear characteristics of a three phase core-type power transformer

    International Nuclear Information System (INIS)

    Dolinar, Matjaz; Stumberger, Gorazd; Polajzer, Bostjan; Dolinar, Drago

    2006-01-01

    This paper presents nonlinear iron core model of a three-phase, three-limb power transformer which is given by the current-dependant characteristics of flux linkages. The magnetically nonlinear characteristics are determined by controlled magnetic excitation of all three limbs which allows to take into account the variable magnetic-cross couplings between different coils placed on limbs, caused by saturation. The corresponding partial derivatives of measured flux linkage characteristics are used in the transformer circuit model as a magnetically nonlinear iron core model in order to analyze the behaviour of a nonsymmetrically excited transformer. Numerical results using transformer model with the determined iron core model agree very well with the measured results

  17. Analysis of normalized-characteristic curves and determination of the granulometric state of dissolved uranium dioxides

    International Nuclear Information System (INIS)

    Melichar, F.; Neumann, L.

    1977-01-01

    Methods are presented for the analysis of normalized-characteristic curves, which make it possible to determine the granulometric composition of a dissolved polydispersion - the cumulative mass distribution of particles - as a function of the relative particle size. If the size of the largest particle in the dissolved polydispersion is known, these methods allow the determination of the dependence of cumulative mass ratios of particles on their absolute sizes. In the inverse method of the geometrical model for determining the granulometric composition of a dissolved polydispersion, the polydispersion is represented by a finite number of monodispersions. An accurate analysis of normalized-characteristic equations leads to the Akselrud dissolution model. As against the other two methods, the latter allows the determination of the granulometric composition for an arbitrary number of particle sizes. The method of the granulometric atlas is a method for estimating the granulometric composition of a dissolved polydispersion and is based on comparison of a normalized-characteristic curve for an unknown granulometric composition with an atlas of normalized-characteristic curves for selected granulometric spectra of polydispersions. (author)

  18. Determining the thermionic converter interval parameters according to volt-ampere characteristics

    International Nuclear Information System (INIS)

    Kajbyshev, V.Z.

    1986-01-01

    On the basis of the condition for independence of plasma parameters on the collector emission and the expression for the ratio of the current from collector into plasma to the passing current at a great collector emission, the technique for determining the electron temperature near the collector, voltage drop in collector, and collector work function according to experimental characteristics is developed

  19. Determination of the internal parameters of tc from the current-voltage characteristics

    International Nuclear Information System (INIS)

    Kaibyshev, V.Z.

    1986-01-01

    This paper proposes a method for determining the effective work function of a collector, the electron temperature, and the voltage drop in the interelectrode gap from the experimental vurrent-voltage characteristics (IVC). Analysis of the boundary conditions at the collector shows that as the emission from the collector increases the height of the potential jump retarding plasma electrons decrease

  20. A mathematical modeling method for determination of local vibroacoustic characteristics of structures

    Science.gov (United States)

    Tartakovskiy, B. D.; Dubner, A. B.

    1973-01-01

    A method is proposed for determining vibroacoustic characteristics from the results of measurements of the distribution of vibrational energy in a structure. The method is based on an energy model of a structure studied earlier. Equations are written to describe the distribution of vibrational energy in a hypothetical diffuse energy state in structural elements.

  1. Determination of flow-rate characteristics and parameters of piezo pilot valves

    Directory of Open Access Journals (Sweden)

    Takosoglu Jakub

    2017-01-01

    Full Text Available Pneumatic directional valves are used in most industrial pneumatic systems. Most of them are two-stage valves controlled by a pilot valve. Pilot valves are often chosen randomly. Experimental studies in order to determine the flow-rate characteristics and parameters of pilot valves were not conducted. The paper presents experimental research of two piezo pilot valves.

  2. Characteristics of the detection system of the Orsay Synchrocyclotron achromatic channel: study and determination

    International Nuclear Information System (INIS)

    Ovazza, D.

    1978-01-01

    Once the multiwire proportional chamber working principle studied it is shown that the avalanche must not necessary surround the anode wire. Geometrical characteristics of the MWPC used behind the 'Montpellier' spectrometer of the IPN synchrocyclotron, are determined from an evaluation of the induced charges on the cathode and anode wires [fr

  3. Physical Principles of the Method for Determination of Geometrical Characteristics and Particle Recognition in Digital Holography

    Science.gov (United States)

    Dyomin, V. V.; Polovtsev, I. G.; Davydova, A. Yu.

    2018-03-01

    The physical principles of a method for determination of geometrical characteristics of particles and particle recognition based on the concepts of digital holography, followed by processing of the particle images reconstructed from the digital hologram, using the morphological parameter are reported. An example of application of this method for fast plankton particle recognition is given.

  4. Method and apparatus for determining characteristics of clay-bearing formations

    International Nuclear Information System (INIS)

    Fertl, W.H.; Ruhovets, N.

    1986-01-01

    This invention relates to methods and apparatus for determining characteristics of clay-bearing geological formations by radioactivity well logging. In its broadest aspect, the invention comprises the steps of determining the volume of clay contained in the earth formations; determining a first property of the formations functionally related to the volume of clay; and determining a second property functionally related to the first property, the second property indicating potential clay swelling. In particular, the volume of clay is determined using electrical signals generated in response to the energy and frequency of detected radiations. The method is carried out with a well logging instrument that includes a high-resolution gamma ray spectrometer that traverses a borehole, whereby natural radiation strikes a scintillation crystal contained therein

  5. Determination of the actual hydraulic characteristics of a main oil pipeline

    Energy Technology Data Exchange (ETDEWEB)

    Gubin, V V; Mironenko, N Ya; Titov, N S; Skovorodnikov, Yu A

    1976-01-01

    A method is presented for construction of hydraulic characteristics of sections of an oil pipeline by pattern recognition methods. In the theory of pattern recognition, the characteristics of a complex object are studied by means of adaptation algorithms. These algorithms allow the generation of models of processes, establishment of the relationships between their defining parameters and output characteristics on the basis of successive processing of information on the object (for example, dispatchers data on a pipeline sector). The analysis does not require analytic formalization of the processes. This work presents a solution of the problem of determination of the pressure loss to friction over the sections of a main pipeline on the basis of the following initial data: oil flowrate, diameter of pipeline, length of section, and viscosity of oil. The range of change of the pressure drop is divided into intervals (classes), and the task of determination of the continuous value is reduced to recognition of its membership in one of the classes with an accuracy equal to the size of an interval. The potential functions method from pattern recognition theory is used to perform the classification. The algorithm presented allows actual operational characteristics of main oil pipelines to be defined with an accuracy sufficient for practical application.

  6. Spreadsheet design and validation for characteristic limits determination in gross alpha and beta measurement

    International Nuclear Information System (INIS)

    Prado, Rodrigo G.P. do; Dalmazio, Ilza

    2013-01-01

    The identification and detection of ionizing radiation are essential requisites of radiation protection. Gross alpha and beta measurements are widely applied as a screening method in radiological characterization, environmental monitoring and industrial applications. As in any other analytical technique, test performance depends on the quality of instrumental measurements and reliability of calculations. Characteristic limits refer to three specific statistics, namely, decision threshold, detection limit and confidence interval, which are fundamental to ensuring the quality of determinations. This work describes a way to calculate characteristic limits for measurements of gross alpha and beta activity applying spreadsheets. The approach used for determination of decision threshold, detection limit and limits of the confidence interval, the mathematical expressions of measurands and uncertainty followed standards guidelines. A succinct overview of this approach and examples are presented and spreadsheets were validated using specific software. Furthermore, these spreadsheets could be used as tool to instruct beginner users of methods for ionizing radiation measurements. (author)

  7. Determination of Terfenol-D magnetostriction characteristics for sensor application using fiber Bragg grating

    Science.gov (United States)

    de Morais Sousa, Kleiton; Zandonay, Ricardo; Vagner da Silva, Erlon; Martelli, Cicero; Cardozo da Silva, Jean Carlos

    2014-08-01

    Electric current sensor based on magnetostriction phenomenon has been reported in several papers. In common these previous papers used a fiber Bragg grating (FBG) to determine the strain of the magnetostrictive material. However, magnetostriction sensors present few disadvantages often neglected, such as the temperature dependence of magnetostriction. In this paper a Terfenol-D rod (a giant magnetostrictive material-GMM) is used for tests. For simultaneous measurement of temperature and strain two multiplexed FBGs are used. The first test presents unipolar characteristics of Terfenol-D magnetostriction. Other test determines the Terfenol-D response for different temperatures. The Terfenol-D sensitivity increase when the temperature increases, however the saturation of the material occurs in small field values. The characteristics presented in this paper must be taken into account in the development of magnetostrictive sensors and its limitations.

  8. Determination of characteristics of feromagnetic material using modern data acquisition system

    Directory of Open Access Journals (Sweden)

    Koprivica Branko

    2009-01-01

    Full Text Available This paper describes the use of modern measuring and data acquisition system for determining characteristics of feromagnetic material. For this purpose data acquisition card NI USB-6009, PC with data acquisition software and fluxmeter Electrical Steel Measuring System MPG 100 D were used. Based on the results obtained by measurements the modeling of hysteresis loop is performed by using appropriate mathematical model.

  9. Comparison of different methods for the determination of dynamic characteristics of low velocity anemometers

    DEFF Research Database (Denmark)

    Melikov, Arsen Krikor; Popiolek, Z.

    2004-01-01

    Three methods for determining the dynamic characteristics of low velocity thermal anemometers were compared. They were: step-up velocity change and step-down velocity change methods and a method based on sinusoidal type velocity fluctuations. Two low velocity thermal anemometers with omnidirectio......Three methods for determining the dynamic characteristics of low velocity thermal anemometers were compared. They were: step-up velocity change and step-down velocity change methods and a method based on sinusoidal type velocity fluctuations. Two low velocity thermal anemometers...... with omnidirectional velocity sensors were tested. The results identify differences in frequency response of low velocity anemometers determined by the three methods. The time constant and the response time determined by the step-up velocity change method and the step-down velocity change method may be substantially...... different and insufficient for describing the frequency response of all low velocity thermal anemometers. Therefore the upper frequency, determined in tests with sinusoidal velocity fluctuations, is recommended to be used in indoor climate standards as a single parameter describing the dynamic...

  10. [Determination of the profiles of secondary metabolites characteristic of Alternaria strains isolated from tomato].

    Science.gov (United States)

    Benavidez Rozo, Martha Elizabeth; Patriarca, Andrea; Cabrera, Gabriela; Fernández Pinto, Virginia E

    2014-01-01

    Many Alternaria species have been studied for their ability to produce bioactive secondary metabolites, such as tentoxin (TEN), some of which have toxic properties. The main food contaminant toxins are tenuazonic acid, alternariol (AOH), alternariol monomethyl ether (AME), altenuene, and altertoxins i, ii and iii. To determine the profiles of secondary metabolites characteristic of Alternaria strains isolated from tomato for their chemotaxonomic classification. The profiles of secondary metabolites were determined by HPLC MS. The Alternaria isolates obtained from spoiled tomatoes belong, according to their morphological characteristics, to the species groups Alternaria alternata, Alternaria tenuissima and Alternaria arborescens, with A. tenuissima being the most frequent. The most frequent profiles of secondary metabolites belonging to the species groups A. alternata (AOH, AME, TEN), A. tenuissima (AOH, AME, TEN, tenuazonic acid) and A. arborescens (AOH, AME, TEN, tenuazonic acid) were determined, with some isolates of the latter being able to synthesize AAL toxins. Secondary metabolite profiles are a useful tool for the differentiation of small spored Alternaria isolates not easily identifiable by their morphological characteristics. Copyright © 2013 Revista Iberoamericana de Micología. Published by Elsevier Espana. All rights reserved.

  11. Characteristics determination of Tanka X-ray Diagnostic Machine Model RTO-125

    International Nuclear Information System (INIS)

    Trijoko, Susetyo; Nasukha; Suyati; Nugroho, Agung.

    1993-01-01

    Characteristics determination of Tanka X-ray diagnostic machine model RTO-125. The characteristics of X-ray machine used for examining patient should be known. The characteristics studied in this paper include : X-ray beam profile, coincidence of the light field with radiation field, peak voltage, radiation quality, stability of exposures, and linearity of exposures against time. Beam profile and radiation-field alignment were determined using X-ray film. Winconsin kVp test cassette was used to measure peak voltage. The quality of the radiation, represented by half-value layer (HVL), was measured using aluminium step-wedge. Stability and linearity of exposures were measured using ionization chamber detector having an air volume of 40 cc. The results of this study were documented for the TANKA X-ray machine model RTO-125 of PSPKR BATAN, and the method of this study could be applied for X-ray diagnostic machine in general. (authors). 6 refs., 2 tabs., 6 figs

  12. Determination of geochemical and natural radioactivity characteristics in Bilecik Marble, Turkey

    Science.gov (United States)

    Yerel Kandemir, Suheyla; Ozbay, Nurgul

    2014-05-01

    Natural stones are one of the oldest known building materials. There are more than 400 natural stone in Turkey. Recently, the demand for the natural stone types in markets has been increasing rapidly. For this reason, the geochemical and natural radioactivity characteristics of natural stone are very important. Bilecik province is located at the northwest part of Turkey and it is surrounded by Sakarya, Bursa, Eskisehir and Kutahya city. Bilecik is one of the important marble industry regions of Turkey. Thus, the geochemical and natural radioactivity characteristics of Bilecik marble are very important. In this study, Bilecik marble was collected to determine the geochemistry and natural radioactivity. Then, analyses of geochemical and natural radioactivity in the marble samples are interpreted. ACKNOWLEDGMENT This study is supported by Bilecik Seyh Edebali University scientific project (Project Number =2011-02-BIL.03-04).

  13. Determination of Smuggled Cigarette Characteristics in Brazil and Their Potential Risk to the Human Health

    Directory of Open Access Journals (Sweden)

    Cleber Pinto da Silva

    2016-07-01

    Full Text Available The objective of this study was to determine the different characteristics of tobacco found in thirty brands of smuggled cigarettes in Brazil. Determination of arsenic through atomic absorption spectrometry in graphite oven was carried out and classical methodologies were employed to determine dirtiness, total ash, insoluble ash, humidity, tobacco pH and sidestream smoke pH. The methodology used to quantify arsenic presented quantification limit of 15.0 ng g-1 and detection limit of 4.0 ng g-1 in dry tobacco mass. The recovery of arsenic for the method purpose was 98.2% and relative standard deviation 6.0%. About 56% of the brands were observed to have arsenic concentrations above 20.0 ng g-1, which means nearly twice as much as the arsenic found in cigarettes sold legally in Brazil. Levels above the recommended value for humidity were found in 53% of brands. About 96% of the brands presented total ash content above that indicated by the Brazilian Pharmacopoeia. About 53% of the samples contained levels of insoluble ash above the limit. In 90% of the samples, the smoke was alkaline. In dirtiness tests, 81.2% of the brands presented some kind of contaminant, such as fungi, insect fragments, grass or mites. The characteristics revealed that the consumption of this kind of cigarette can increase risks to consumer health. DOI: http://dx.doi.org/10.17807/orbital.v8i3.832 

  14. Design of training programs for a positive youth development program: Project P.A.T.H.S. in Hong Kong.

    Science.gov (United States)

    Shek, Daniel T L; Chak, Yammy L Y

    2010-01-01

    To facilitate the implementation of the Secondary 1 to Secondary 3 program of the Project P.A.T.H.S. in Hong Kong, systematic training programs are designed for the potential program implementers. The rationales, objectives and design of the Secondary 1 to Secondary 3 training programs are outlined in this paper. The training programs cover theories of adolescent development, positive youth development, background and curricula of the Project P.A.T.H.S., factors affecting program implementation quality and evaluation of the project. Besides introducing the curriculum units, the training programs also focus on nature of learning and related theories (particularly experiential learning), teaching methods and instructional techniques, motivating students, and classroom management.

  15. Reconstruction of t anti tH (H → bb) events using deep neural networks with the CMS detector

    Energy Technology Data Exchange (ETDEWEB)

    Rieger, Marcel; Erdmann, Martin; Fischer, Benjamin; Fischer, Robert; Heidemann, Fabian; Quast, Thorben; Rath, Yannik [III. Physikalisches Institut A, RWTH Aachen University (Germany)

    2016-07-01

    The measurement of Higgs boson production in association with top-quark pairs (t anti tH) is an important goal of Run 2 of the LHC as it allows for a direct measurement of the underlying Yukawa coupling. Due to the complex final state, however, the analysis of semi-leptonic t anti tH events with the Higgs boson decaying into a pair of bottom-quarks is challenging. A promising method for tackling jet parton associations are Deep Neural Networks (DNN). While being a widely spread machine learning algorithm in modern industry, DNNs are on the way to becoming established in high energy physics. We present a study on the reconstruction of the final state using DNNs, comparing to Boosted Decision Trees (BDT) as benchmark scenario. This is accomplished by generating permutations of simulated events and comparing them with truth information to extract reconstruction efficiencies.

  16. Evaluation of Project P.A.T.H.S. in Hong Kong: Utilization of Student Weekly Diary

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2008-01-01

    Full Text Available Four schools participating in the experimental implementation phase of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes (Secondary 1 level were randomly selected and invited to join this research study. After completion of the Tier 1 Program, Secondary 1 students in the participating schools were invited to write a reflective journal in the form of a weekly diary in order to reveal their perceptions and feelings regarding the Tier 1 Program and the related benefits. Results of the qualitative data analyses showed that most of the respondents (a had positive views on the program, (b had positive views on the instructors, and (c stated that they had acquired competencies at societal, familial, interpersonal, and personal levels after joining the program. The present qualitative findings based on students' weekly diaries provide additional support for the effectiveness of the Tier 1 Program of P.A.T.H.S. in Hong Kong.

  17. Characteristics of the FTU scrape-off layer (SOL) determined by a simple 1-D model

    International Nuclear Information System (INIS)

    Ferro, C.

    1994-12-01

    A simple 1-D model analytical model has been developed to determine the SOL characteristics from the parameters of the main plasma. The solutions are compared with FTU experimental data. The solutions fit quite well the experimental data and their trend. Moreover the model suggests the presence of a critical density related to the non isothermal power flux and the corresponding maximum power which can be safely removed by volumetric sinks. Differences between a limiter-like configuration and a divertor-like configuration are described

  18. DETERMINATION OF THE POMOLOGICAL CHARACTERISTICS OF ALMONDS (Prunus amygdalus Batsh GROWN IN MALATYA (TURKEY

    Directory of Open Access Journals (Sweden)

    Turan Karadeniz

    2003-06-01

    Full Text Available About 500 types of Almond were taken under investigated with the view of fruit characteristics grown in Malatya. In these types, the nut shell weights between 2.73 and 10.74 g, kernel weights were 0.71 and 1.40 g, the percentage of kernel 11.17 and 50.91 %, the shell thickness 3.5 and 8.1 mm, the nut width 12.0 and 28.6 mm, the nut length 18.2 and 48.2 mm, the fruit hight 7.1 and 20.3 mm were determined.

  19. Determination of tire cross-sectional geometric characteristics from a digitally scanned image

    Science.gov (United States)

    Danielson, Kent T.

    1995-08-01

    A semi-automated procedure is described for the accurate determination of geometrical characteristics using a scanned image of the tire cross-section. The procedure can be useful for cases when CAD drawings are not available or when a description of the actual cured tire is desired. Curves representing the perimeter of the tire cross-section are determined by an edge tracing scheme, and the plyline and cord-end positions are determined by locations of color intensities. The procedure provides an accurate description of the perimeter of the tire cross-section and the locations of plylines and cord-ends. The position, normals, and curvatures of the cross-sectional surface are included in this description. The locations of the plylines provide the necessary information for determining the ply thicknesses and relative position to a reference surface. Finally, the locations of the cord-ends provide a means to calculate the cord-ends per inch (epi). Menu driven software has been developed to facilitate the procedure using the commercial code, PV-Wave by Visual Numerics, Inc., to display the images. From a single user interface, separate modules are executed for image enhancement, curve fitting the edge trace of the cross-sectional perimeter, and determining the plyline and cord-end locations. The code can run on SUN or SGI workstations and requires the use of a mouse to specify options or identify items on the scanned image.

  20. Search for $t\\bar{t}H$ production in the $H \\rightarrow b\\bar{b}$ channel

    CERN Document Server

    David, Claire; The ATLAS collaboration

    2018-01-01

    A search for the Standard Model Higgs boson produced in association with top-quark pair, $t\\bar{t}H$, and targeting the $H \\rightarrow b\\bar{b}$ decay mode is presented. The analysis uses 36.1 fb$^{-1}$ of $pp$ collision data at $\\sqrt{s}$ = 13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. Events must contain either one or two electrons or muons from the top-quark decays and are further categorized according to the multiplicities of jets and jets containing a b-hadron (b-jets). Two-stage multivariate techniques are used to discriminate between signal and the dominant background $t\\bar{t}$ + jets. The ratio of the measured $t\\bar{t}H$ signal cross-section to the Standard Model expectation is found to be $\\mu = 0.84^{+0.64}_{-0.61}$. A value of μ greater than 2.0 is excluded at 95% confidence level. The expected upper limit is $\\mu$ < 1.2 in the absence of a $t\\bar{t}H$ signal.

  1. Prevention of Adolescent Problem Behavior: Longitudinal Impact of the Project P.A.T.H.S. in Hong Kong

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2011-01-01

    Full Text Available The present study attempts to examine the longitudinal impact of a curriculum-based positive youth development program, entitled the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes, on adolescent problem behavior in Hong Kong. Using a longitudinal randomized group design, six waves of data were collected from 19 experimental schools (n = 3,797 at Wave 1 in which students participated in the Project P.A.T.H.S. and 24 control schools (n = 4,049 at Wave 1. At each wave, students responded to questions asking about their current problem behaviors, including delinquency and use of different types of drugs, and their intentions of engaging in such behaviors in the future. Results based on individual growth curve modeling generally showed that the participants displayed lower levels of substance abuse and delinquent behavior than did the control students. Participants who regarded the program to be helpful also showed lower levels of problem behavior than did the control students. The present findings suggest that the Project P.A.T.H.S. is effective in preventing adolescent problem behavior in the junior secondary school years.

  2. Preparation and determination of the luminescent characteristics of ZrO2 in powder

    International Nuclear Information System (INIS)

    Rivera M, T.; Olvera T, L.; Azorin N, J.; Soto E, A.M.; Velazquez O, C.; Campero C, A.

    2004-01-01

    In this work the luminescent characteristics of the ZrO 2 are presented using the method of Thermally Stimulated Luminescence (TSL), also called thermoluminescence (Tl). The powders of ZrO 2 were obtained by two preparation methods: for precipitation and for evaporation of Sol-gel. The luminescent characteristics of the ZrO 2 are determined using a lamp of radiation of UV light and a radiation source of beta particles of 90 Sr/ 90 Y. Using the method of thermal stimulation the curve representative thermoluminescent of the previously irradiated material was obtained. The curve Tl of the ZrO 2 irradiated with UV light presents a maximum in 180 C. Likewise, the spectrum of the curve Tl of the ZrO 2 irradiated with particles beta presents a maximum centered in 181 C. While using gamma radiation like excitement source one has a spectrum with a peak centered in 184 C. When subjecting the materials obtained by sol-gel to a process of calcination at 1000 C for 24 hours a curved Tl it presents with two maxim in 185 and in 290 C respectively. The intensity of the response induced in the material it is a decisive factor to continue studying the dosimetric characteristics of the ZrO 2 what allows to consider it as a potential material to use it in the beta particle dosimetry and of the UV light using the thermoluminescence method (Tl). (Author)

  3. Determination of electrical characteristics of body tissues for computational dosimetry studies

    International Nuclear Information System (INIS)

    Silva, Rafael Monteiro da Cruz; Domingues, Luis Adriano M.C.; Neto, Athanasio Mpalantinos; Barbosa, Carlos Ruy Nunez

    2008-01-01

    Increasing public concern about human exposure to electromagnetic fields led to the development of International Exposure Standards, which reflect the actual scientific knowledge on this subject. Existing exposure limits (reference levels), are based on maximum admissible fields or induced currents densities inside human bodies, called basic restrictions. Since those physical quantities can not be readily measured, they must be estimated using techniques of computational dosimetry. These techniques rely on accurate computational modelling of human bodies to establish the relation of external field (electric / magnetic) to induced current (internal field). Nowadays the models available for human body simulation (FEM, FDM,...) are quite accurate, specially when using geometric discretization obtained from medical imaging techniques, however the determination of tissues characteristics (permittivity and conductivity) is still an issue to be dealt with. In current studies the electrical characteristics (permittivity and conductivity) of body tissues are based on values which were obtained from measurements done on tissue simples obtained from dead bodies. However those values may not represent adequately the behaviour of living tissues. In this paper a research designed to characterize the permittivity of human body tissues is presented, consisting of measurements and simulations designed to determine, using indirect methods, the electrical behaviour of living tissues. A study of exposure assessment on a real high voltage transmission line in Brazil, using measured permittivity values combined with a finite element model of the human body is presented in the panel. (author)

  4. Determination of knock characteristics in spark ignition engines: an approach based on ensemble empirical mode decomposition

    International Nuclear Information System (INIS)

    Li, Ning; Liang, Caiping; Yang, Jianguo; Zhou, Rui

    2016-01-01

    Knock is one of the major constraints to improve the performance and thermal efficiency of spark ignition (SI) engines. It can also result in severe permanent engine damage under certain operating conditions. Based on the ensemble empirical mode decomposition (EEMD), this paper proposes a new approach to determine the knock characteristics in SI engines. By adding a uniformly distributed and finite white Gaussian noise, the EEMD can preserve signal continuity in different scales and therefore alleviates the mode-mixing problem occurring in the classic empirical mode decomposition (EMD). The feasibilities of applying the EEMD to detect the knock signatures of a test SI engine via the pressure signal measured from combustion chamber and the vibration signal measured from cylinder head are investigated. Experimental results show that the EEMD-based method is able to detect the knock signatures from both the pressure signal and vibration signal, even in initial stage of knock. Finally, by comparing the application results with those obtained by short-time Fourier transform (STFT), Wigner–Ville distribution (WVD) and discrete wavelet transform (DWT), the superiority of the EEMD method in determining knock characteristics is demonstrated. (paper)

  5. Characteristic Determination Of Self Shielding Factor And Cadmium Ratio Of Cylindrical Probe

    International Nuclear Information System (INIS)

    Hamzah, Amir; Budi R, Ita; Pinem, Suriam

    1996-01-01

    Determination of thermal, epithermal and total self shielding factor and cadmium ratio of cylindrical probe has been done by measurement and calculation. Self shielding factor can be determined by dividing probe activity to Al-alloy probe activity. Due to the lack of cylindrical probe made of Al-alloy, self shielding factor can be determined by parabolic extrapolation of measured activities to 0 cm radius to divide those activities. Theoretically, self shielding factor can be determined by making numerical solution of two dimensional integral equations using Romberg method. To simplify, the calculation is based on single collision theory with the assumption of monoenergetic neutron and isotropic distribution. For gold cylindrical probe, the calculation results are quite close to the measurement one with the relative discrepancy for activities, cadmium ratio and self shielding factor of bare probe are less then 11.5%, 3,5% and 1.5% respectively. The program can be used for the calculation of other kinds of cylindrical probes. Due to dependency to radius, cylindrical probe made of copper has the best characteristic of self shielding factor and cadmium ratio

  6. Determining characteristics of artificial near-Earth objects using observability analysis

    Science.gov (United States)

    Friedman, Alex M.; Frueh, Carolin

    2018-03-01

    Observability analysis is a method for determining whether a chosen state of a system can be determined from the output or measurements. Knowledge of state information availability resulting from observability analysis leads to improved sensor tasking for observation of orbital debris and better control of active spacecraft. This research performs numerical observability analysis of artificial near-Earth objects. Analysis of linearization methods and state transition matrices is performed to determine the viability of applying linear observability methods to the nonlinear orbit problem. Furthermore, pre-whitening is implemented to reformulate classical observability analysis. In addition, the state in observability analysis is typically composed of position and velocity; however, including object characteristics beyond position and velocity can be crucial for precise orbit propagation. For example, solar radiation pressure has a significant impact on the orbit of high area-to-mass ratio objects in geosynchronous orbit. Therefore, determining the time required for solar radiation pressure parameters to become observable is important for understanding debris objects. In order to compare observability analysis results with and without measurement noise and an extended state, quantitative measures of observability are investigated and implemented.

  7. Socio-demographic characteristics as determinants of differences in perception of local gastronomy

    Directory of Open Access Journals (Sweden)

    Vuksanović Nikola

    2017-01-01

    Full Text Available This study aims to research differences in socio-demographic characteristics of foreign tourists in consumption of local food in the city centres Belgrade and Novi Sad, Republic of Serbia. The research was conducted on a sample of 673 respondents. The results of this study point out the importance of socio-demographic variables in research of local gastronomy as a significant component of tourism product. The research included the determining of the impact of the city the tourists stayed at. The differences were examined via two-factor ANOVA analysis of variance. The obtained results indicate that there are differences between age groups, in the level of education, monthly income and countries that foreign tourists come from, whereas there is no difference between genders in relation to the perception of local gastronomy. At the same time, the findings indicate that there are no differences in the perception of local gastronomy between the cities of Novi Sad and Belgrade. The results confirm previous studies and point out the significance of socio-demographic characteristics of foreign tourists in their perception of local gastronomy and adapting it to the visitors, regardless of the city they visited.

  8. Determining firm characteristics and the level of voluntary corporate governance disclosures among Malaysian listed property companies

    Directory of Open Access Journals (Sweden)

    Talpur Shabana

    2018-01-01

    Full Text Available This study examined the level of voluntary corporate governance disclosures and the influence of firm characteristics (i.e., firm size, firm age, and firm market listing on the level of these disclosures among Malaysian property listed companies. The check-list to measure the voluntary corporate governance disclosures was adopted from Malaysian corporate governance index 2011 by Minority Shareholder Watchdog Group (MSWG. The voluntary corporate governance disclosure practices and firm specific characteristics were obtained from annual reports of property listed companies on Bursa Malaysia for the period of 2012 to 2015. The findings suggested an improving voluntary corporate governance reforms in Malaysia. However, the firm size was found as an inflicting factor in determining the level and quality of voluntary corporate governance disclosure practices. On the contrary, the results found were contradicting the hypothesis related to firm age and firm market listing, as no relation of voluntary corporate governance disclosures and firm age and firm market listing. The study has made an interesting contribution toward the disclosure and corporate governance by contributing in understanding the importance of quality disclosure and good governance practices.

  9. Determination of moving load characteristics by output-only identification over the Pescara beams

    Science.gov (United States)

    Bellino, A.; Garibaldi, L.; Marchesiello, S.

    2011-07-01

    The determination of the characteristics of moving loads over bridges and beams is a topic that only recently has gained the interest of the researchers. In real applications, in fact, as for the case of bridges, it is not always possible to know the load and speed of the trains which are travelling over the bridge. Moreover, in real applications the systems analyzed cannot be always considered linear. Because of these difficulties, the present paper proposes firstly a technique for the identification of the nonlinearity, secondly a procedure to subtract its effect on the modal parameters and finally a method based on them to extract the information on the mass and the speed of the moving load crossing a beam. For this study, some reinforced concrete beams have been tested in the framework of a vast project titled "Monitoring and diagnostics of railway bridges by means of the analysis of the dynamics response due to train crossing", financed by Italian Ministry of Research. These beams show a clear softening nonlinear behaviour during the crossing of a moving carriage. The method is able to detect the load characteristics after having eliminated the nonlinear influence.

  10. The water kefir grain inoculum determines the characteristics of the resulting water kefir fermentation process.

    Science.gov (United States)

    Laureys, D; De Vuyst, L

    2017-03-01

    To investigate the influence of the water kefir grain inoculum on the characteristics of the water kefir fermentation process. Three water kefir fermentation processes were started with different water kefir grain inocula and followed as a function of time regarding microbial species diversity, community dynamics, substrate consumption profile and metabolite production course. The inoculum determined the water kefir grain growth, the viable counts on the grains, the time until total carbohydrate exhaustion, the final metabolite concentrations and the microbial species diversity. There were always 2-10 lactic acid bacterial cells for every yeast cell and the majority of these micro-organisms was always present on the grains. Lactobacillus paracasei, Lactobacillus hilgardii, Lactobacillus nagelii and Saccharomyces cerevisiae were always present and may be the key micro-organisms during water kefir fermentation. Low water kefir grain growth was associated with small grains with high viable counts of micro-organisms, fast fermentation and low pH values, and was not caused by the absence of exopolysaccharide-producing lactic acid bacteria. The water kefir grain inoculum influences the microbial species diversity and characteristics of the fermentation process. A select group of key micro-organisms was always present during fermentation. This study allows a rational selection of a water kefir grain inoculum. © 2016 The Society for Applied Microbiology.

  11. In situ determination of flocculated suspended material settling velocities and characteristics using a floc camera

    Science.gov (United States)

    Schoellhamer, David H.; Haught, Dan; Manning, Andrew

    2012-01-01

    Estimates of suspended sediment settling are necessary for numerical sediment models, water quality studies, and rehabilitation of coastal ecosystems. Settling of cohesive sediment, which is common in estuaries, is more difficult to quantify than noncohesive sediment because of flocculation. Flocs are composed of an aggregation of finer silts, clays, and organic material. Floc characteristics, such as the diameter, density, porosity, and water content determine floc settling velocities. A floc camera provides the ability to capture the settling velocities and other desired characteristics of individual flocs in situ. Water samples taken using a Van Dorn sampler are immediately subsampled using a pipette and transferred to the floc camera. The Perspex settling column is outfitted with a LED backlighting to distinguish flocs. The floc camera’s high pixel and temporal resolution allows image analysis software to detect individual flocs and process floc statistics per image. Observed changes in floc location with respect to time presents a way of calculating settling velocities. This work presents results of validation tests with known sediment size distributions and of deployment of the camera during a field study.

  12. Determination of moving load characteristics by output-only identification over the Pescara beams

    International Nuclear Information System (INIS)

    Bellino, A; Garibaldi, L; Marchesiello, S

    2011-01-01

    The determination of the characteristics of moving loads over bridges and beams is a topic that only recently has gained the interest of the researchers. In real applications, in fact, as for the case of bridges, it is not always possible to know the load and speed of the trains which are travelling over the bridge. Moreover, in real applications the systems analyzed cannot be always considered linear. Because of these difficulties, the present paper proposes firstly a technique for the identification of the nonlinearity, secondly a procedure to subtract its effect on the modal parameters and finally a method based on them to extract the information on the mass and the speed of the moving load crossing a beam. For this study, some reinforced concrete beams have been tested in the framework of a vast project titled M onitoring and diagnostics of railway bridges by means of the analysis of the dynamics response due to train crossing , financed by Italian Ministry of Research. These beams show a clear softening nonlinear behaviour during the crossing of a moving carriage. The method is able to detect the load characteristics after having eliminated the nonlinear influence.

  13. Spectrophotometric method for quantitative determination of total anthocyanins and quality characteristics of roselle (Hibiscus sabdariffa).

    Science.gov (United States)

    Sukwattanasinit, Tasamaporn; Burana-Osot, Jankana; Sotanaphun, Uthai

    2007-11-01

    A simple, rapid and cost-saving method for the determination of total anthocyanins in roselle has been developed. The method was based on pH-differential spectrophotometry. The calibration curve of the major anthocyanin in roselle, delphinidin 3-sambubioside (Dp-3-sam), was constructed by using methyl orange and their correlation factor. The reliability of this developed method was comparable to the direct method using standard Dp-3-sam and the HPLC method. Quality characteristics of roselle produced in Thailand were also reported. Its physical quality met the required specifications. The overall chemical quality was herein surveyed for the first time and it was found to be the important parameter corresponded to the commercial grading of roselle. Total contents of anthocyanins and phenolics were proportional to the antiradical capacity.

  14. Determination of drying characteristics and quality properties of eggplant in different drying conditions

    Directory of Open Access Journals (Sweden)

    Gözde Bayraktaroglu Urun

    2015-12-01

    Full Text Available Drying is the most traditional process used for preserving eggplant a long time. The aim of this study was to determining drying characteristics and quality properties of eggplant dried by sun drying, hot air convective drying and infrared assisted convective drying. Convective drying and infrared assisted convective were carried out in a convective dryer at three different temperatures(40°, 50°, 60°C and air velocity at 5 m/s.The increasing of temperatures during the drying of eggplant led to a significant reduction of the drying time. However loss of nutrition was observed in eggplant samples dried at higher temperature.The biggest change in colour parameters was observed in samples dried with sun drying.So it was thought that sun drying had a negative effect on quality properties of eggplant samples.

  15. The Actual Balance of Power in Asia-Pacific: Determinants, Characteristics and New Trends

    Directory of Open Access Journals (Sweden)

    Iulia Monica Oehler-Sincai

    2017-09-01

    Full Text Available The present paper is structured around the following research objectives: (1 identification of the main characteristics of AsiaPacific relations, strategic partnerships and regional rivalries; (2 justification of the need to address this topic both economically and geostrategically; (3 correlation between India’s intention to become a member of APEC (aimed at expanding its sphere of influence in the region, its Act East strategy and the invigoration of strategic partnerships with China’s competitors; (4 reactivation of the debate on principles of governance in Asia and the features of the Factory Asia, highlighting the roles played by China, Japan, ASEAN and India’s new role in the Asian economic integration; (5 the entry of the UK into the Asia-Pacific equation, supported, among other determinants, by the goal of expanding its sphere of influence worldwide.

  16. Factors determining differences in biological effectiveness of ionizing radiations possessing different physical characteristics

    International Nuclear Information System (INIS)

    Korogodin, V.I.; Krasavin, E.A.

    1982-01-01

    Radiosensitivity of pro- and eukaryotes (D 0- 1 ) is considered with regard to the linear energy transfer (LET) of ionizing radiations. It was shown that radiosensitivity, as a function of LET, D 0- 1 (LET), is determined by not merely physical characteristics of radiations but also the ability of repair of DNA double strand breaks (DSB). The increase in the radiosensitivity of eukaryotes is connected with the decrease in the DSB repair when cells are exposed to densely ionizing particles. The decrease in DSB repair is apparently connected with the increment of straight DSB, comparing to enzymatic DSB, upon exposure to heavy ions. Potential mechanisms of D 0- 1 (LET) modifications for radiosensitive and superresistant mutants are discussed

  17. Determination of mycotoxin profiles characteristic of Alternaria strains isolated from Malbec grapes

    Directory of Open Access Journals (Sweden)

    Vargas Trinidad Andrea

    2015-01-01

    Full Text Available The world grape production has increased, reaching 751 million quintals (Mql in 2013. Many Alternaria species have been studied for their ability to produce secondary metabolites in foods, some of which have toxic properties with tenu- azonic acid (TA, alternariol (AOH, alternariol methyl ether (AME being the most important ones. The aim was to determine the characteristic mycotoxin production profiles of Alternaria strains isolated from Malbec grapes in the Patagonian region of Argentina. Fifty Alternaria isolates (5 A. alternata, 5 A. arborescens and 40 A. tenuissima were analyzed for the produc- tion of mycotoxins (TA, AOH and AME in autoclaved rice media by High Performance Liquid Chromatography (HPLC. All isolates were found to be producers of mycotoxins; the 100% was producer of TA (0.016–21.031 mg/kg, 98% produced AOH (0.003–0.057 mg/kg and 36% produced AME (0.001–0.133 mg/kg. Thirty-three isolates co-produced the three mycotoxins. In this study, it was demonstrated a high toxigenic potential of Alternaria isolates. Although Alternaria growth on grapes has been amply demonstrated, there are few studies about the incidence their more characteristic mycotoxin sand their toxicogenic capac- ity determination in grapes, wines and derivatives. In addition, mycotoxins studied in this work are not regulated in oenology. Therefore, further studies should be conducted to assess the health risk due to the presence of Alternaria toxins in grapes, wine, grape juice and raisins.

  18. Determination of Component Contents of Blend Oil Based on Characteristics Peak Value Integration.

    Science.gov (United States)

    Xu, Jing; Hou, Pei-guo; Wang, Yu-tian; Pan, Zhao

    2016-01-01

    Edible blend oil market is confused at present. It has some problems such as confusing concepts, randomly named, shoddy and especially the fuzzy standard of compositions and ratios in blend oil. The national standard fails to come on time after eight years. The basic reason is the lack of qualitative and quantitative detection of vegetable oils in blend oil. Edible blend oil is mixed by different vegetable oils according to a certain proportion. Its nutrition is rich. Blend oil is eaten frequently in daily life. Different vegetable oil contains a certain components. The mixed vegetable oil can make full use of their nutrients and make the nutrients more balanced in blend oil. It is conducive to people's health. It is an effectively way to monitor blend oil market by the accurate determination of single vegetable oil content in blend oil. The types of blend oil are known, so we only need for accurate determination of its content. Three dimensional fluorescence spectra are used for the contents in blend oil. A new method of data processing is proposed with calculation of characteristics peak value integration in chosen characteristic area based on Quasi-Monte Carlo method, combined with Neural network method to solve nonlinear equations to obtain single vegetable oil content in blend oil. Peanut oil, soybean oil and sunflower oil are used as research object to reconcile into edible blend oil, with single oil regarded whole, not considered each oil's components. Recovery rates of 10 configurations of edible harmonic oil is measured to verify the validity of the method of characteristics peak value integration. An effective method is provided to detect components content of complex mixture in high sensitivity. Accuracy of recovery rats is increased, compared the common method of solution of linear equations used to detect components content of mixture. It can be used in the testing of kinds and content of edible vegetable oil in blend oil for the food quality detection

  19. NLO QCD corrections to off-shell t anti t and t anti tH at the ILC

    International Nuclear Information System (INIS)

    Reuter, Juergen; Chokoufe Nejad, Bijan; Weiss, Christian

    2017-01-01

    We discuss top-quark physics at the ILC with a focus on the full off-shell processes for t anti t and t anti tH production, including top-quark decays and also leptonic W decays. A special focus is on the matching of the resummed vNRQCD threshold calculation and the fixed-order NLO QCD continuum calculation, where we present an update on the validation of the matching. All of the calculations have been performed in the WHIZARD event generator framework.

  20. A Simple Experiment to Determine the Characteristics of an NTC Thermistor for Low-Temperature Measurement Applications

    Science.gov (United States)

    Mawire, A.

    2012-01-01

    A simple low-cost experiment for undergraduate students to determine the characteristics of a negative temperature coefficient of resistance thermistor is presented. The experiment measures the resistance-temperature and voltage-temperature characteristics of the thermistor. Results of the resistance-temperature experiment are used to determine…

  1. A methodological framework to determine optimum durations for the construction of soil water characteristic curves using centrifugation

    NARCIS (Netherlands)

    Vero, Sara E.; Healy, Mark G.; Henry, Tiernan; Creamer, Rachel E.; Ibrahim, Tristan G.; Forrestal, Patrick J.; Richards, Karl G.; Fenton, Owen

    2016-01-01

    During laboratory assessment of the soil water characteristic curve (SWCC), determining equilibrium at various pressures is challenging. This study establishes a methodological framework to identify appropriate experimental duration at each pressure step for the construction of SWCCs via

  2. Surface characteristics determining the cell compatibility of ionically cross-linked alginate gels

    International Nuclear Information System (INIS)

    Machida-Sano, Ikuko; Hirakawa, Makoto; Matsumoto, Hiroki; Kamada, Mitsuki; Ogawa, Sakito; Satoh, Nao; Namiki, Hideo

    2014-01-01

    In this study we investigated differences in the characteristics determining the suitability of five types of ion (Fe 3+ , Al 3+ , Ca 2+ , Ba 2+ and Sr 2+ )-cross-linked alginate films as culture substrates for cells. Human dermal fibroblasts were cultured on each alginate film to examine the cell affinity of the alginates. Since cell behavior on the surface of a material is dependent on the proteins adsorbed to it, we investigated the protein adsorption ability and surface features (wettability, morphology and charge) related to the protein adsorption abilities of alginate films. We observed that ferric, aluminum and barium ion-cross-linked alginate films supported better cell growth and adsorbed higher amounts of serum proteins than other types. Surface wettability analysis demonstrated that ferric and aluminum ion-cross-linked alginates had moderate hydrophilic surfaces, while other types showed highly hydrophilic surfaces. The roughness was exhibited only on barium ion-cross-linked alginate surface. Surface charge measurements revealed that alginate films had negatively charged surfaces, and showed little difference among the five types of gel. These results indicate that the critical factors of ionically cross-linked alginate films determining the protein adsorption ability required for their cell compatibility may be surface wettability and morphology. (paper)

  3. Determination of pulse profile characteristics of multi spot retinal photocoagulation lasers.

    Science.gov (United States)

    Clarkson, Douglas McG; Makhzoum, Osama; Blackburn, John

    2015-10-01

    A system is described for determination of discrete pulse train characteristics of multi spot laser delivery systems for retinal photocoagulation. While photodiodes provide an ideal detection mechanism, measurement artifacts can potentially be introduced by the spatial pattern of the delivered beam relative to a discrete photodiode element. This problem was overcome by use of an integrating sphere to produce a uniform light field at the site of the photodiode detector. A basic current driven photodiode detection circuit incorporating an operational amplifier was used to generate a signal captured by a commercially available USB interface device at a rate of 10 kHz. Studies were undertaken of a Topcon Pascal Streamline laser system with output at a wavelength of 577 nm (yellow). This laser features the proprietary feature of 'Endpoint Management' ™ where pulses can be delivered as 100% of set energy levels with visible reaction on the retina and also at a reduced energy level to create potentially non visible but clinically effective lesions. Using the pulse train measurement device it was identified that the 'Endpoint Management' ™ delivery mode of pulses of lower energy was achieved by reducing the pulse duration of pulses for non-visible effect pulses while maintaining consistent beam power levels within the delivered pulse profile. The effect of eye geometry in determining safety and effectiveness of multi spot laser delivery for retinal photocoagulation is discussed. Copyright © 2015 IPEM. Published by Elsevier Ltd. All rights reserved.

  4. Determination of boundary layer top on the basis of the characteristics of atmospheric particles

    Science.gov (United States)

    Liu, Boming; Ma, Yingying; Gong, Wei; Zhang, Ming; Yang, Jian

    2018-04-01

    The planetary boundary layer (PBL) is the lowest layer of the atmosphere that can be directly influenced with the Earth's surface. This layer can also respond to surface forcing. The determination of the PBL is significant to environmental and climate research. PBL can also serve as an input parameter for further data processing with atmospheric models. Traditional detection algorithms are susceptible to errors associated with the vertical distribution of aerosol concentrations. To overcome this limitation, a maximum difference search (MDS) algorithm was proposed to calculate the top of the boundary layer based on differences in particle characteristics. The top positions of the PBL from MDS algorithm under different convection states were compared with those from conventional methods. Experimental results demonstrated that the MDS method can determine the top of the boundary layer precisely. The proposed algorithm can also be used to calculate the top of the PBL accurately under weak convection conditions where the traditional methods cannot be applied. Finally, experimental data from June 2015 to December 2015 were analysed to verify the reliability of the MDS algorithm. The correlation coefficients R2 (RMSE) between the results of MDS algorithm and radiosonde measurements were 0.53 (115 m), 0.79 (141 m) and 0.96 (43 m) under weak, moderate and strong convections, respectively. These findings indicated that the proposed method possessed a good feasibility and stability.

  5. Compositional characteristics of commercial yoghurt based on quantitative determination of viable lactic acid bacteria

    Directory of Open Access Journals (Sweden)

    Niketić Gordana B.

    2009-01-01

    Full Text Available Yoghurt quality is particularly difficult to standardize because of the many forms, varieties, manufacturing methods, ingredients and consumer preferences that exist. Since these factors will always play an important role, it is unlikely that a uniform yoghurt quality concept will ever emerge, such as has been developed for other dairy products. There are a number of common denominators, however that have bearing on yoghurt quality. Since a number of producers are recognized within the broad category entitled yoghurt. This situation makes yoghurt an interesting, challenging, but also a confusing area to work in. The present investigation was undertaken to isolate from commercial yoghurt the strains involved in its manufacture and determine the characteristics of Streptococcus thermophilus and Lactobacillus delbrueckii subsp.bulgaricus. This study is concerned with the lactic acid bacteria (L.delbrueckii subsp. bulgaricus and S. thermophilus growth in yoghurt from involving different procedures and with the determination of the number of lactic acid bacteria in dependence of the temperature and acidity in the period of storage. Predominant samples of yoghurt were with 11-107/ml lactic acid lactococci (44.28%.

  6. [An analysis of 68 invasive lobular breast cancer cases in clinicopathological characteristics and the prognostic determinants].

    Science.gov (United States)

    Liu, Q; Xiang, H Y; Ye, J M; Xu, L; Zhang, H; Zhang, S; Duan, X N; Liu, Y H

    2018-02-01

    Objective: To study the clinicopathological characteristics and the prognostic determinants of the invasive lobular carcinoma breast cancer. Methods: This was a retrospective single-center study of invasive lobular breast cancer cases diagnosed from January 2008 to December 2014 at Peking University First Hospital Breast Disease Center. The study enrolled 68 invasive lobular breast cancer patients, which represented 3.64% (68/1 870) of total invasive breast cancer. The median age of all selected patients was 46 years ranging from 36 to 83 years. All patients were restaged based on the 8(th) edition of AJCC cancer staging system and follow-up data including disease-free survival (DFS) and overall survival (OS) were analyzed to explore the prognostic determinants. The 5-year OS and DFS were calculated using Kaplan-Meier method; the significance of correlations between clinicopathological features and prognostic factors was estimated using log-rank test. Results: There were significant differences in OS between patients with different anatomic stage, prognostic stage, lymph node metastasis, progesterone receptor (PR) expression, lymphvascular invasion and perineural invasion (χ(2:) 4.318 to 32.394, all P invasion (χ(2:) 4.347 to 27.369, all P invasion are the prognostic factors of invasive lobular breast cancer. Regard to invasive lobular breast cancer patients, clinicians should pay close attention to the differences between prognostic stage and anatomic stage.

  7. Determination of groundwater characteristics in the Nigde-Misli Plain by means of isotopes

    International Nuclear Information System (INIS)

    Bursali, S.; Ertan, I.; Yalcin, H.; Gunay, G.; Onhon, E.

    1975-06-01

    Nigde-Misli Plain, situated in the Central Anatolia, is 30 km north to Nigde City. The most important part of the plain is Golcuk with a superficial area of 290 sq. kilometers. Ovacik part has a superficial area of 22 sq. kilometers and separately Edikli part with 35 sq. kilometers. The total of the superficial area of the plain is 347 sq. km and its average altitude is 1340 m. The main purpose of this study is to check the sufficiency of the Nigde-Misli aquifer from which all of the wells are fed. Hydrogeological studies of the Nigde-Misli Plain have been completed in order to determine some of the groundwater characteristics. However, it was thought that it would be useful to check and support the hydrogeological conclusions by isotopic methods and to clarify some important points in the groundwater movement for which hydrogeological methods seem to be insufficient. For this purpose, surface water and ground water, precipitation and soil samples have been collected and analysed to determine their stable isotopes and tritium contents. Results have been interpreted in order to answer, as far as it is possible, to the question of the sufficiency of the Nigde-Misli aquifer

  8. Receiver Operating Characteristic (ROC to Determine Cut-Off Points of Biomarkers in Lung Cancer Patients

    Directory of Open Access Journals (Sweden)

    Heidi L. Weiss

    2004-01-01

    Full Text Available The role of biomarkers in disease prognosis continues to be an important investigation in many cancer studies. In order for these biomarkers to have practical application in clinical decision making regarding patient treatment and follow-up, it is common to dichotomize patients into those with low vs. high expression levels. In this study, receiver operating characteristic (ROC curves, area under the curve (AUC of the ROC, sensitivity, specificity, as well as likelihood ratios were calculated to determine levels of growth factor biomarkers that best differentiate lung cancer cases versus control subjects. Selected cut-off points for p185erbB-2 and EGFR membrane appear to have good discriminating power to differentiate control tissues versus uninvolved tissues from patients with lung cancer (AUC = 89% and 90%, respectively; while AUC increased to at least 90% for selected cut-off points for p185erbB-2 membrane, EGFR membrane, and FASE when comparing between control versus carcinoma tissues from lung cancer cases. Using data from control subjects compared to patients with lung cancer, we presented a simple and intuitive approach to determine dichotomized levels of biomarkers and validated the value of these biomarkers as surrogate endpoints for cancer outcome.

  9. MOTHER – CHILD RELATION AND FACTORS AFFECTING T H I S RELATION

    Directory of Open Access Journals (Sweden)

    Fatma TEZEL ŞAHİ N

    2014-09-01

    Full Text Available The social institution where a child first meet with his birth and sets his social relations is his family. The communication of parents and other members of family determines the place of child in the family. In the preschool period when the basis of futu re lives is formed, healthy relations made with child are of great importance. What kind of a person the child starting to perceive himself and his environment in this period will be is determined with the life in this period. Family and relations within f amily as a structure have an impact on the child. Relations within family and experiences will be determinants of the relations with others. In particular, the tie formed in the earlier years between mother and child will have an effect on the personality creation and social relations in the period of adolescence and adulthood. Successful relations of the child and unconditioned love and trust that will be built with his mother is known to be the basis of their future life. In order that a mother could get in a healthy relation with her child, it is necessary that she should have an attitude of self - confidence, respectful, sensible to his problems, collaborative, sharing the feelings and views her children and accepting them. Mothers having an insisting atti tude not to accept their views and excluding them and not looking for a logic in their views cannot build a healthy relation. Children growing up with a healthy mother – child relation will become independent individuals with a self - esteem. The basis of a healthy mother – child relation depends on an infancy period starting with the process of pregnancy and going on with physical contact and nutrition after birth. Mother’s feeding of her baby, her care and preparation for life creates love and feeling of tr ust at child. When the child becomes an adult, he will guide his life with these two basic feelings. Mother should be a person giving her love to him, supporting the child

  10. DPRK's 4"t"h Nuclear Test and its Tritium Production

    International Nuclear Information System (INIS)

    Kim, Min Soo; Lee, Sang Joon; Chang, Sun Young

    2016-01-01

    On January 6, 2016 at 10:30am, the artificial earthquake in the DPRK was detected by multiple international seismic organizations. After 2 hours, the DPRK announced on state TV that 'The first H-bomb test was successfully conducted in the DPRK at 10:00 am on Wednesday, Juche 105(2016), pursuant to the strategic determination of the ruling communist party.' There has been a doubt about the real nature of the DPRK's 4th nuclear test, since 2 months have been passed after its nuclear test. To analyze the nature of the DPRK's nuclear test, it is necessary to check possible options for production of essential materials. The pathways to produce nuclear fusion material (tritium) and to have a relatively high possibility for the DPRK are described in this article. Tritium is key material for H-bomb. And there are two options for the DPRK which are 1) production and 2) illicit trafficking. And this study is focused on production possibility of DPRK. Determination of the nature of DPRK's nuclear test is very hard issue

  11. Experimental and theoretical determination of dosimetric characteristics of IsoAid ADVANTAGETM125I brachytherapy source

    International Nuclear Information System (INIS)

    Meigooni, Ali S.; Hayes, Joshua L.; Zhang Hualin; Sowards, Keith

    2002-01-01

    125 I brachytherapy sources are being used for interstitial implants in tumor sites such as the prostate. Recently, the ADVANTAGE TM 125 I, Model IAI-125, source became commercially available for interstitial brachytherapy treatment. Dosimetric characteristics (dose rate constant, radial dose function, and anisotropy function) of this source were experimentally and theoretically determined, following the AAPM Task Group 43 recommendations. Derivation of the dose rate constant was based on recent NIST WAFAC calibration performed in accordance with their 1999 standard. Measurements were performed in Solid Water TM phantom using LiF thermoluminescent dosimeters. The theoretical calculations were performed in both Solid Water TM and water using the PTRAN Monte Carlo code. The results indicated that a dose rate constant of the new source in water was 0.98±0.03 cGy h -1 U -1 . The radial dose function of the new source was measured in Solid Water TM and calculated both in water and Solid Water TM at distances up to 10.0 cm. The anisotropy function, F(r,θ), of the new source was measured and calculated in Solid Water TM at distances of 2 cm, 3 cm, 5 cm, and 7 cm and also was calculated in water at distances ranging from 1 cm to 7 cm from the source. From the anisotropy function, the anisotropy factors and anisotropy constant were derived. The anisotropy constant of the ADVANTAGE TM 125 I source in water was found to be 0.97±0.03. The dosimetric characteristics of this new source compared favorably with those from the Amersham Health Model 6711 source. Complete dosimetric parameters of the new source are presented in this paper

  12. Determination of the mechanical characteristics of irradiated metals from the results of microhardness tests

    International Nuclear Information System (INIS)

    Hofman, A.

    1999-01-01

    To predict the possibilities of using structural materials in nuclear and thermonuclear reactors, it is important to have data on changes of the mechanical characteristics and irradiation obtained from full-scale or simulation tests. Materials are irradiated in nuclear reactors with fast neutrons, the sources of high-energy neutrons with an energy of 14 MeV and the accelerators of charged particles. The restricted volumes for irradiation of these specimens in the systems and also the need to test large numbers of specimens under the same conditions make it necessary to reduce the size of irradiated specimens. To solve this problem, work is being carried out to develop various methods of testing miniature specimens, including tension extrusion of disc-shaped micro-specimens, microhardness, and the Charpy Method. In examination of the irradiation hardening of the materials, the main advantage of the microhardness method is that it makes it possible to examine small specimens. In single microhardness tests, only a small area of the irradiated specimens is examined. This makes it possible to increase the radiation dose and carry out subsequent tests of microhardness on the same specimens. The aim of this work was to determine the possibilities of using the microhardness measurement method for evaluating the mechanical characteristics of metallic materials. The comparison of the data, obtained in microhardness tests and in tensile loading specimens of 0Kh18N10Tsteel, irradiated with neutrons, shows the efficiency of the microhardness method as a tool for investigating the irradiation hardening of reactor materials

  13. Impact of the Project P.A.T.H.S. in the Junior Secondary School Years: Individual Growth Curve Analyses

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2011-01-01

    Full Text Available The Tier 1 Program of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programs is a positive youth development program implemented in school settings utilizing a curricular-based approach. In the third year of the Full Implementation Phase, 19 experimental schools (n = 3,006 students and 24 control schools (n = 3,727 students participated in a randomized group trial. Analyses based on linear mixed models via SPSS showed that participants in the experimental schools displayed better positive youth development than did participants in the control schools based on different indicators derived from the Chinese Positive Youth Development Scale, including positive self-identity, prosocial behavior, and general positive youth development attributes. Differences between experimental and control participants were also found when students who joined the Tier 1 Program and perceived the program to be beneficial were employed as participants of the experimental schools. The present findings strongly suggest that the Project P.A.T.H.S. is making an important positive impact for junior secondary school students in Hong Kong.

  14. Impact of the project P.A.T.H.S. In the junior secondary school years: individual growth curve analyses.

    Science.gov (United States)

    Shek, Daniel T L; Ma, Cecilia M S

    2011-02-03

    The Tier 1 Program of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programs) is a positive youth development program implemented in school settings utilizing a curricular-based approach. In the third year of the Full Implementation Phase, 19 experimental schools (n = 3,006 students) and 24 control schools (n = 3,727 students) participated in a randomized group trial. Analyses based on linear mixed models via SPSS showed that participants in the experimental schools displayed better positive youth development than did participants in the control schools based on different indicators derived from the Chinese Positive Youth Development Scale, including positive self-identity, prosocial behavior, and general positive youth development attributes. Differences between experimental and control participants were also found when students who joined the Tier 1 Program and perceived the program to be beneficial were employed as participants of the experimental schools. The present findings strongly suggest that the Project P.A.T.H.S. is making an important positive impact for junior secondary school students in Hong Kong.

  15. Theoretical and experimental determination of dosimetric characteristics for ADVANTAGETM Pd-103 brachytherapy source

    International Nuclear Information System (INIS)

    Meigooni, Ali S.; Dini, Sharifeh A.; Awan, Shahid B.; Dou, Kai; Koona, Rafiq A.

    2006-01-01

    ADVANTAGE TM Pd-103 brachytherapy source has been recently introduced by IsoAid TM for prostate permanent implants. Dosimetric characteristics (Dose rate constant, radial dose function, 2D-, and 1D-anisotropy functions) of this source model have been determined using both theoretical and experimental methods, following the updated TG-43U1 protocol. Derivation of the dose rate constant was based on recent NIST WAFAC calibration performed in accordance with the 1999 Standards. Measurements were performed in Solid Water TM using LiF TLD chips and the theoretical calculations were performed in Solid Water TM and liquid water phantom materials using PTRAN Monte Carlo code. The results of the Monte Carlo simulation have shown a dose rate constant of 0.69 cGy h -1 U -1 in liquid water and 0.67 cGy h -1 U -1 in Solid Water TM medium. The measured dose rate constant in Solid Water TM was found to be 0.68±8% cGy h -1 U -1 , which is in a good agreement (within ±5%) to the Monte Carlo simulated data. The 2D- and 1D-anisotropy functions of the ADVANTAGE TM Pd-103 source were calculated for radial distances ranging from 0.5 to 5.0 cm. Radial dose function was determined for radial distances ranging from 0.2 to 8.0 cm using line source approximation. All these calculations are based on L eff equal to 3.61 cm, calculated following TG-43U1 recommendations. The tabulated data for 2D-anisotropy function, 1D-anisotropy function, dose rate constant and radial dose function have been produced for clinical application of this source model

  16. Theoretical and experimental determination of dosimetric characteristics for ADVANTAGE{sup TM} Pd-103 brachytherapy source

    Energy Technology Data Exchange (ETDEWEB)

    Meigooni, Ali S. [Department of Radiation Medicine, University of Kentucky Medical Center, 800 Rose Street, Lexington, Kentucky 40536 (United States)]. E-mail: alimeig@uky.edu; Dini, Sharifeh A. [Department of Radiation Medicine, University of Kentucky Medical Center, 800 Rose Street, Lexington, Kentucky 40536 (United States); Awan, Shahid B. [Department of Radiation Medicine, University of Kentucky Medical Center, 800 Rose Street, Lexington, Kentucky 40536 (United States); Dou, Kai [Department of Radiation Medicine, University of Kentucky Medical Center, 800 Rose Street, Lexington, Kentucky 40536 (United States); Koona, Rafiq A. [Department of Radiation Medicine, University of Kentucky Medical Center, 800 Rose Street, Lexington, Kentucky 40536 (United States)

    2006-08-15

    ADVANTAGE{sup TM} Pd-103 brachytherapy source has been recently introduced by IsoAid{sup TM} for prostate permanent implants. Dosimetric characteristics (Dose rate constant, radial dose function, 2D-, and 1D-anisotropy functions) of this source model have been determined using both theoretical and experimental methods, following the updated TG-43U1 protocol. Derivation of the dose rate constant was based on recent NIST WAFAC calibration performed in accordance with the 1999 Standards. Measurements were performed in Solid Water{sup TM} using LiF TLD chips and the theoretical calculations were performed in Solid Water{sup TM} and liquid water phantom materials using PTRAN Monte Carlo code. The results of the Monte Carlo simulation have shown a dose rate constant of 0.69 cGy h{sup -1} U{sup -1} in liquid water and 0.67 cGy h{sup -1} U{sup -1} in Solid Water{sup TM} medium. The measured dose rate constant in Solid Water{sup TM} was found to be 0.68{+-}8% cGy h{sup -1} U{sup -1}, which is in a good agreement (within {+-}5%) to the Monte Carlo simulated data. The 2D- and 1D-anisotropy functions of the ADVANTAGE{sup TM} Pd-103 source were calculated for radial distances ranging from 0.5 to 5.0 cm. Radial dose function was determined for radial distances ranging from 0.2 to 8.0 cm using line source approximation. All these calculations are based on L {sub eff} equal to 3.61 cm, calculated following TG-43U1 recommendations. The tabulated data for 2D-anisotropy function, 1D-anisotropy function, dose rate constant and radial dose function have been produced for clinical application of this source model.

  17. Determination of the characteristics of a Schottky barrier formed by latent finger mark corrosion of brass

    International Nuclear Information System (INIS)

    Bond, J W

    2009-01-01

    The ideality factor (η) and barrier height (φ B ) for a metal-copper(I) oxide rectifying contact formed by the latent finger mark corrosion of α phase brass have been determined from forward bias I/V characteristics in the range 0.4 V ≤ V ≤ 0.55 V. Rectifying contacts formed from the finger mark deposits of different people gave η = 1.5-1.6 ± 0.1 and φ B = 0.49-0.52 ± 0.04 V. A Mott-Schottky plot of capacitance-voltage measurements in reverse bias gave the built in potential ψ bi = 0.4 ± 0.1 V, the gradient of the plot confirming the conductivity of the finger mark corrosion as p type. X-ray photoelectron spectroscopy spectra of the corrosion showed that Cu(I), Cu(II) and Zn(II) can co-exist on the surface, the Cu(I) : Cu(II) and Zn : Cu ratios determining whether a rectifying contact is formed. Initial findings suggest that when the concentration of Cu(I) dominates the Cu(I) : Cu(II) ratio (approximately 6 : 1), or when Cu(II) is absent, a rectifying contact can be formed subject to the Zn : Cu ratio being approximately 1 : 3. As the surface concentration of zinc increases, the rectifying contact is degraded until the concentration of zinc approaches that of copper when no evidence of a Schottky barrier is observed and the contact appears ohmic.

  18. Determination of Some Land and Soil Characteristics of Siirt Province with Geographic Information System Analysis

    Directory of Open Access Journals (Sweden)

    Mehmet Arif ÖZYAZICI

    2014-09-01

    Full Text Available The main aim of this research was to determine some land and soil characteristics of Siirt province and to make database using Geographic Information System (GIS. The study area covers about 562619.5 ha. Firstly, digital elevation model was formed using topographic map of the Siirt province and after this process slope, aspect, elevation and hill shade maps were also produced. In addition to that, some data produced General Directory of Rural Services and climate data were used in this study. According to study results, west part of the Siirt province has almost flat area whereas, hilly and mountain area locate in north and east part of it. Therefore, slope degree increase from west to north and east ways. More than half of the study area’s soil types (65% is Brown forest soils. Besides, according to land use and land cover map about 44% and 31% of the study area covers by shrubbery-brush and pastures, respectively. According to erosion maps, approximately %90 of the Siirt province lands has medium, severe and very severe erosion problem. Lands that are suitable for agricultural activities are very limited in Siirt Province. Only about 9% of the total land was classified as I, II and III land capability classes. Moreover, investigated depth map of the study area about 85% of the study area has very shallow and shallow soil depth. Deep soils found on plain and valley located at west part of the study area.

  19. [Characteristic fingerprint analysis and determination of main components on Andrographis paniculata extract by UPLC].

    Science.gov (United States)

    Zhang, Hui-ye; Xu, Xiao-fei; Huang, Yong; Wamg, De-qin; Deng, Qiao-hua

    2014-06-01

    To establish an analytical method for characteristic fingerprint and determination of main components of Andrographis paniculata Extract by UPLC. The chromatographic conditions were Waters ACQUITY UPLC BEH-C18 (2. 1 mm x 0 mm,1.7 μm)by gradient elute using acetonitrile-water as mobile phase(0 -2 min,20% ~ 25% A;2 ~ 5 min,25% ~ 35% A;5 ~ 7 min,35% A;7 ~10 min,35%~ 55% A) at a flow rate of 0. 5 min/mL,detecting wavelength at 220 nm. Results:Contents of the andrographolide, neoandrographolide, 14-deoxyandrographolide and 14-deoxy-l11,12-didehydroandrographolide had good resolution with the correlation coefficients exceed 0. 9999 and the average percent recovery lied in 97. 2% to 103.9%, RSD was less than 3.0% (n = 6). The chromatograms of Andrographis paniculata Extract shared seven common peaks in which four of them were recognized by reference standard with the similarities over 0. 9. It is a fast,accurate and validated method,and can be useful in quality evaluations of Andrographis paniculata Extract.

  20. Determination of fruit characteristics, fatty acid profile and total antioxidant capacity of Mespilus germanica L. fruit

    Directory of Open Access Journals (Sweden)

    Hale Seçilmiş Canbay

    2015-11-01

    Full Text Available Objective: To determine fruit characteristics, fatty acid profile and total antioxidant capacitiy of first cultured Mespilus germanica L. Methods: A total of 15 fruits were taken randomly from four directions of adult trees. Then the physical and chemical properties of first cultured medlar fruit (Istanbul/Turkey were measured by using refractometer, colorimeter, spectrophotometer and gas chromatograph mass spectrometer, respectivly. Results: In the fruit studied, the results showed that palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid and behenic acid were the most abundant fatty acids (FAs, and the main FA was palmitic acid [(35.35 ± 1.20%]. The percentage of linoleic acid and stearic acid in this fruit oil were (29.10 ± 1.70% and (8.53 ± 0.25%, respectively. As a result of the analysis, the total antioxidant capacity of medlar fruit was (1.1 ± 0.2 mmol trolox equivalents/L. Conclusions: The present study has demonstrated the concentrations of FAs and the antioxidantive capacity of first cultured Istanbul medlar fruits by using many tested methods. It is proved that in our daily life, medlar fruit plays a significant role with its nutrition and health effect.

  1. Detection of Genes that Determine Maize Grain Quality Characteristics and Resistance to Stress Factors

    Directory of Open Access Journals (Sweden)

    Markovskyi, O.V.

    2014-01-01

    Full Text Available 200 experimental maize samples (Maize Company were examined for the presence of genes that determine the quality characteristics of grain (wx and fl-2 genes, herbicide (bar (pat, epsps genes and insect (cry-genes resistance. The total DNA was extracted from maize living plant tissue. Primers to detect wx, fl-2, bar (pat, mepsps, CP4 epsps, cry1A(b, cry1F, cry1A.105, mcry3A, cry2Ab2, cry3Bb1, cry34Ab1, cry35Ab1 genes were designed and selected. Multiplex and Touchdown PCR were worked out. PCR amplification of certain sequences was carried out. No transgenes (bar (pat, mepsps, CP4 epsps, cry1A(b, cry1F, cry1A.105, mcry3A, cry2Ab2, cry3Bb1, cry34Ab1, cry35Ab1 were found among 200 analyzed experimental maize samples. At the same time, fl-2 gene was found in 41 samples, wx gene was found in 192 analyzed samples.

  2. Shear resonance mode decoupling to determine the characteristic matrix of piezoceramics for 3-D modeling.

    Science.gov (United States)

    Pardo, Lorena; García, Alvaro; de Espinosa, Francisco Montero; Brebøl, Klaus

    2011-03-01

    The determination of the characteristic frequencies of an electromechanical resonance does not provide enough data to obtain the material properties of piezoceramics, including all losses, from complex impedance measurements. Values of impedance around resonance and antiresonance frequencies are also required to calculate the material losses. Uncoupled resonances are needed for this purpose. The shear plates used for the material characterization present unavoidable mode coupling of the shear mode and other modes of the plate. A study of the evolution of the complex material coefficients as the coupling of modes evolves with the change in the aspect ratio (lateral dimension/thickness) of the plate is presented here. These are obtained using software. A soft commercial PZT ceramic was used in this study and several shear plates amenable to material characterization were obtained in the range of aspect ratios below 15. The validity of the material properties for 3-D modeling of piezoceramics is assessed by means of finite element analysis, which shows that uncoupled resonances are virtually pure thickness-driven shear modes.

  3. The determinants of fuel use in the trucking industry - volume, fleet characteristics and the rebound effect

    DEFF Research Database (Denmark)

    de Borger, Bruno; Mulalic, Ismir

    2012-01-01

    This paper studies the determinants of fuel use in the trucking industry in Denmark, using aggregate time series data for the period 1980–2007. The model captures the main linkages between the demand for freight transport, the characteristics of the vehicle fleet, and the demand for fuel. Results...... of this effect is approximately 10% in the short run and 17% in the long run, so that a 1% improvement in fuel efficiency reduces fuel use by 0.90% (short-run) to 0.83% (long-run). Second, we find that higher fuel prices raise the average capacity of trucks, and they induce firm sto invest in newer, typically...... more fuel efficient, trucks. Third, these adjustments and the rebound effect jointly imply that the effect of higher fuel prices on fuel use in the trucking industry is fairly small; estimated price elasticities are _0:13 and _0:22 in the short run and in the long run, respectively. The empirical...

  4. Determination of the contents and distribution characteristics of REE in natural plants by NAA

    International Nuclear Information System (INIS)

    Wang, Y.Q.; Sun, J.X.; Chen, H.M.; Guo, F.Q.

    1997-01-01

    The concentration of 8 REEs (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in 17 species of plants and their host soil, which were collected from a rare earth ore area located in the south of China, have been determined by INAA. The chondritic normalized REE patterns for different parts of plants (e.g., leaf, stem and root) and their host soils were studied. The results showed that the concentration levels of REE for most plants in the sampling area were elevated. Particularly, the leaves of the fern (Dicranopteris dichotoma) contain extremely high concentration of the total REE (675-3358 μg/g). Generally, these REE distribution patterns in every part of plants were very similar and reflected the characteristics of their host soils. However, the chondritic normalized REE patterns in some plants relative to the host soil revealed obvious fractionation, such as the depletion of the heavy REE (for fern, Citrus reticulata and Brassia campestris), the heavy REE enrichment (for Camellia sinensis, Camellia oleifera and Ziziphus) and the Ce positive anomaly (for Gardenia jasminoides). (author)

  5. Determination of physiomorphological characteristics of potato crop regulated by potassium management

    International Nuclear Information System (INIS)

    Pervez, M.A.; Ayyub, C.M.; Shaheen, M.R.; Noor, M.A.

    2013-01-01

    Balanced use of nutrients is essential for sustainable productivity of crops. Nitrogen and phosphorus fertilizers are being used while potassium (K) application is ignored which causes serious decrease in the status of K in soils of potato growing areas. Has prodigious importance in improving quality and yield of potatoes. Therefore, the research project of field studies was designed with different levels K from SOP to determine its effects on some physio-morphological features of potato. A promising red potato cultivar Desiree was selected. Optimal recommended doses of nitrogen and phosphors (250 and 125 kg ha/sup -1/ respectively) along with 6 levels of K, i.e. 50, 100, 150, 200, 250, 300 kg K/sub 2/O ha/sup -1/ were applied. Data of different qualitative and quantitative characteristics was collected under the Randomized Complete Block Design with three replications and was analyzed by using standard statistical over the year techniques. The results revealed that SOP at the level of 150 kg ha/sup -1/ gave the best results in most of the parameters (i.e. total emergence percentage, plant height, number of tubers per plant, tuber weight per plant, yield per hectare, TSS, tuber dry weight per plant) while, extremely high dose of SOP showed the poor results as compared to control for some of the parameters. Number of aerial stems per plant, number of leaves per plant, specific gravity of tubers and tuber dry mass did not show any significant change with change in K levels. (author)

  6. Site geological and geotechnical studies, determination of soil characteristics and soil response studies

    International Nuclear Information System (INIS)

    1985-08-01

    RFS or Regles Fondamentales de Surete (Basic Safety Rules) applicable to certain types of nuclear facilities lay down requirements with which compliance, for the type of facilities and within the scope of application covered by the RFS, is considered to be equivalent to compliance with technical French regulatory practice. The object of the RFS is to take advantage of standardization in the field of safety, while allowing for technical progress in that field. They are designed to enable the operating utility and contractors to know the rules pertaining to various subjects which are considered to be acceptable by the Service Central de Surete des Installations Nucleaires, or the SCSIN (Central Department for the Safety of Nuclear Facilities). These RFS should make safety analysis easier and lead to better understanding between experts and individuals concerned with the problems of nuclear safety. The SCSIN reserves the right to modify, when considered necessary, any RFS and specify, if need be, the terms under which a modification is deemed retroactive. The purpose of this RFS is to specify the soil characteristics to be determined and the soil response studies to be performed as part of site geological and geotechnical studies

  7. Active and Passive Microwave Determination of the Circulation and Characteristics of Weddell and Ross Sea Ice

    Science.gov (United States)

    Drinkwater, Mark R.; Liu, Xiang

    2000-01-01

    A combination of satellite microwave data sets are used in conjunction with ECMWF (Medium Range Weather Forecasts) and NCEP (National Center for Environment Prediction) meteorological analysis fields to investigate seasonal variability in the circulation and sea-ice dynamics of the Weddell and Ross Seas. Results of sea-ice tracking using SSM/I (Special Sensor Microwave Imager), Scatterometer and SAR images are combined with in-situ data derived from Argos buoys and GPS drifters to validate observed drift patterns. Seasonal 3-month climatologies of ice motion and drift speed variance illustrate the response of the sea-ice system to seasonal forcing. A melt-detection algorithm is used to track the onset of seasonal melt, and to determine the extent and duration of atmospherically-led surface melting during austral summer. Results show that wind-driven drift regulates the seasonal distribution and characteristics of sea-ice and the intensity of the cyclonic Gyre circulation in these two regions.

  8. Biodiesel Production from Selected Microalgae Strains and Determination of its Properties and Combustion Specific Characteristics

    Directory of Open Access Journals (Sweden)

    N. Kokkinos

    2015-11-01

    Full Text Available Biofuels are gaining importance as significant substitutes for the depleting fossil fuels. Recent focus is on microalgae as the third generation feedstock. In the present research work, two indigenous fresh water and two marine Chlorophyte strains have been cultivated successfully under laboratory conditions using commercial fertilizer (Nutrileaf 30-10-10, initial concentration=70 g/m3 as nutrient source. Gas chromatographic analysis data showed that microalgae biodiesel obtained from Chlorophyte strains biomass were composed of fatty acid methyl esters. The produced microalgae biodiesel achieved a range of 2.2 - 10.6 % total lipid content and an unsaturated FAME content between 49 mol% and 59 mol%. The iodine value, the cetane number, the cold filter plugging point, the oxidative stability as well as combustion specific characteristics of the final biodiesels were determined based on the compositions of the four microalgae strains. The calculated biodiesel properties compared then with the corresponding properties of biodiesel from known vegetable oils, from other algae strains and with the specifications in the EU (EN 14214 and US (ASTM D6751 standards. The derived biodiesels from indigenous Chlorophyte algae were significantly comparable in quality with other biodiesels.

  9. Determinants of hospital fall rate trajectory groups: a longitudinal assessment of nurse staffing and organizational characteristics.

    Science.gov (United States)

    Everhart, Damian; Schumacher, Jessica R; Duncan, R Paul; Hall, Allyson G; Neff, Donna F; Shorr, Ronald I

    2014-01-01

    Patient falls in acute care hospitals represent a significant patient safety concern. Although cross-sectional studies have shown that fall rates vary widely between acute care hospitals, it is not clear whether hospital fall rates remain consistent over time. The aim of this study was to determine whether hospitals can be categorized into fall rate trajectory groups over time and to identify nurse staffing and hospital characteristics associated with hospital fall rate trajectory groups. We conducted a 54-month (July 2006-December 2010) longitudinal study of U.S. acute care general hospitals participating in the National Database for Nursing Quality Indicators (2007). We used latent class growth modeling to categorize hospitals into groups based on their long-term fall rates. Nurse staffing and hospital characteristics associated with membership in the highest hospital fall rate group were identified using logistic regression. A sample of 1,529 hospitals (mean fall rate of 3.65 per 1,000 patient days) contributed data to the analysis. Latent class growth modeling findings classified hospital into three groups based on fall rate trajectories: consistently high (mean fall rate of 4.96 per 1,000 patient days), consistently medium (mean fall rate of 3.63 per 1,000 patient days), and consistently low (mean fall rate of 2.50 per 1,000 patient days). Hospitals with higher total nurse staffing (odds ratio [OR] = 0.92, 95% confidence interval [CI] [0.85, 0.99]), Magnet status (OR = 0.49, 95% CI [0.35, 0.70]), and bed size greater than 300 beds (OR = 0.70, 95% CI [0.51, 0.94]) were significantly less likely to be categorized in the "consistently high" fall rate group. Over this 54-month period, hospitals were categorized into three groups based on long-term fall rates. Hospital-level factors differed among these three groups. This suggests that there may be hospitals in which "best practices" for fall prevention might be identified. In addition, administrators may be able

  10. Gender, work roles and psychosocial work characteristics as determinants of health.

    Science.gov (United States)

    Matthews, S; Hertzman, C; Ostry, A; Power, C

    1998-06-01

    This paper aims to identify gender similarities and differences in psychosocial work characteristics for those in and out of paid employment, to inform research on possible health-related effects. Specifically five questions are addressed: do women report poorer work characteristics than men; are gender differences related to specific characteristics; do work characteristics differ between full- and part-time women workers and between those in paid and unpaid work; are socio-economic gradients in work characteristics similar for men and women; and, if there are gradients, do they differ between women in paid and unpaid work? Analyses are based on the 33 year follow-up of the 1958 British birth cohort. Four psychosocial work characteristics were examined: learning opportunities, monotony, pace of work, and flexibility of breaks. Women reported more negative work characteristics than men, primarily because of differences in learning opportunities (26% lacked opportunity compared with 13% of men) and monotonous work (47 and 31% respectively). Women in full-time employment reported fewer negative characteristics (27%) than part-time (39%) or home-workers (36%). Home-workers had fewer opportunities for learning (36%) and greater monotony (49%) than paid workers (21 and 22% respectively), however fewer home-workers reported inability to control the work pace (11% compared to 23%) and inflexibility of breaks (21% compared to 47%). Socio-economic gradients in work characteristics were similar among men and women, except for flexibility of break times. A socio-economic gradient in work characteristics was found for full- and part-time workers, but not among home-workers. Differences in self reported health were also examined: a social gradient was found for all employment status groups, being strongest for home-workers despite the absence of a gradient in negative work characteristics. In conclusion, these marked gender differences in psychosocial work characteristics need

  11. Teaching Money Literacy in a Positive Youth Development Program: The Project P.A.T.H.S. in Hong Kong

    Directory of Open Access Journals (Sweden)

    Tak Yan Lee

    2011-01-01

    Full Text Available In view of the high impact of materialistic orientation among children and adolescents, financial educational programs are provided as preventive measures. Without a clear framework, it is impossible to evaluate these programs. The goals of this paper are threefold. Firstly, the phenomena related to adolescent materialistic orientation and its associated problems in Hong Kong are examined. Secondly, the concept of financial education as a preventive measure is reviewed. Both board and narrow definitions of money literacy are examined. A framework on money literacy for children and adolescents as a founding stone for financial education is proposed. The framework finds its support from a typology proposed by the authors and results from an integration of research findings on dimensions of the concepts of money and success. Finally, curriculum units for Grades 7 to 9 students in a positive youth development program (the Project P.A.T.H.S. are developed using the framework.

  12. Teaching Money Literacy in a Positive Youth Development Program: The Project P.A.T.H.S. in Hong Kong

    Science.gov (United States)

    Lee, Tak Yan; Law, Ben M. F.

    2011-01-01

    In view of the high impact of materialistic orientation among children and adolescents, financial educational programs are provided as preventive measures. Without a clear framework, it is impossible to evaluate these programs. The goals of this paper are threefold. Firstly, the phenomena related to adolescent materialistic orientation and its associated problems in Hong Kong are examined. Secondly, the concept of financial education as a preventive measure is reviewed. Both board and narrow definitions of money literacy are examined. A framework on money literacy for children and adolescents as a founding stone for financial education is proposed. The framework finds its support from a typology proposed by the authors and results from an integration of research findings on dimensions of the concepts of money and success. Finally, curriculum units for Grades 7 to 9 students in a positive youth development program (the Project P.A.T.H.S.) are developed using the framework. PMID:22194664

  13. Secondary 1 Program of Project P.A.T.H.S.: Process Evaluation Based on the Co-Walker Scheme

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2009-01-01

    Full Text Available This study examined the implementation quality of the Tier 1 Program (Secondary 1 Curriculum delivered in the second year of the Full Implementation Phase of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes. Under the “Co-Walker Scheme”, systematic observation of curriculum units was conducted in 138 schools. Results indicated that the overall level of program adherence was high, with an average of 82.9%. The mean ratings of the program implementation quality were also high. Despite limitations, the findings of this study suggest that the implementation of the Secondary 1 Program (Tier 1 Program of the Full Implementation Phase was of very high quality. The present findings also provide strong evidence to account for the successful and encouraging outcomes of a major positive youth development program in Hong Kong.

  14. [Determinants of task preferences when performance is indicative of individual characteristics: self-assessment motivation and self-verification motivation].

    Science.gov (United States)

    Numazaki, M; Kudo, E

    1995-04-01

    The present study was conducted to examine determinants of information-gathering behavior with regard to one's own characteristics. Four tasks with different self-congruent and incongruent diagnosticity were presented to subjects. As self-assessment theory predicted, high diagnostic tasks were preferred to low tasks. And as self-verification theory predicted, self-congruent diagnosticity had a stronger effect on task preference than self-incongruent diagnosticity. In addition, subjects who perceived the relevant characteristics important inclined to choose self-assessment behavior more than who did not. Also, subjects who were certain of their self-concept inclined to choose self-verification behavior more than who were not. These results suggest that both self-assessment and self-verification motivations play important roles in information-gathering behavior regarding one's characteristics, and strength of the motivations is determined by the importance of relevant characteristics or the certainty of self-concept.

  15. Improvement of the NSSS T/H Module for Enhancing the Simulation Fidelity of KNPEC-2 Simulator

    International Nuclear Information System (INIS)

    Kim, Kyung Doo; Lee, Seung Wook; Jeong, Jae Jun; Lee, Myung Soo

    2005-01-01

    KEPRI(Korea Electric Power Research Institute) and KAERI (Korea Atomic Energy Research Institute) jointly developed and supplied a realistic NSSS (Nuclear Steam Supply System) T/H (Thermal-Hydraulic) module (named ARTS) based on the best-estimate code RETRAN-3D for the improvement of the KNPEC-2 full-scope simulator in 2001. Although ARTS can simulate the most transients in real-time, and its robustness is ensured, real-time calculation and robustness can fail for largebreak (LB) loss-of-coolant accident (LOCA) and longterm, two-phase transients. In order to improve its robustness, ARTS equipped with the backup calculation module to be used whenever a regular ARTS module fails to calculate. When the symptom for the failure of T/H module is detected, the main ARTS module is replaced with the backup module for the calculation of primary and secondary reactor system although most failures of ARTS occur in the calculation of the primary system especially for LB LOCA simulation. The sudden transition from the main ARTS module to the backup module can exhibit the discontinuity of simulation of secondary system on rare occasions. To mitigate the simulation discontinuity, we have improved the backup module of ARTS. The performance of a new approach has been illustrated by the non-integrated standalone test. The improved ARTS module will be incorporated into KNPEC-2 simulator and evaluated its performance in the real simulator environment. This paper presents the brief description of a new backup calculation strategy and the simulation results of LOCA to evaluate the performance of a new backup strategy in standalone test environment

  16. Reversal of human allergen-specific CRTH2+ T(H)2 cells by IL-12 or the PS-DSP30 oligodeoxynucleotide.

    Science.gov (United States)

    Annunziato, F; Cosmi, L; Manetti, R; Brugnolo, F; Parronchi, P; Maggi, E; Nagata, K; Romagnani, S

    2001-11-01

    The chemoattractant receptor homologous molecule expressed on T(H)2 cells (CRTH2) is a receptor for prostaglandin D(2), which among human T cells is selectively expressed by T(H)2 and type 2 cytotoxic effectors. Our purpose was to assess whether the cytokine production profile of T(H)2 effectors could be reversed by exploiting their selective expression of CRTH2. CRTH2(+) T cells were purified from the blood of allergic subjects, stimulated with the specific allergen in the absence or presence of IL-12, and assessed by flow cytometry at the single-cell level for their ability to produce IL-4 and/or IFN-gamma after antigen or polyclonal stimulation. Both IL-12 and the PS-DSP30 oligodeoxynucleotide enabled CRTH2(+) allergen-stimulated T(H)2 cells to produce IFN-gamma. This change in the profile of cytokine production by T(H)2 cells from allergic subjects was related to the upregulation of IL-12 receptor beta2 chain and was associated with the loss of CRTH2. These data demonstrate that the cytokine production pattern of fully differentiated T(H)2 effectors can be changed to a less polarized profile, thus providing the physiologic basis for new immunotherapeutic strategies in allergic disorders.

  17. On determining the noon polar cap boundary from SuperDARN HF radar backscatter characteristics

    Directory of Open Access Journals (Sweden)

    M. Pinnock

    Full Text Available Previous work has shown that ionospheric HF radar backscatter in the noon sector can be used to locate the footprint of the magnetospheric cusp particle precipitation. This has enabled the radar data to be used as a proxy for the location of the polar cap boundary, and hence measure the flow of plasma across it to derive the reconnection electric field in the ionosphere. This work used only single radar data sets with a field of view limited to ~2 h of local time. In this case study using four of the SuperDARN radars, we examine the boundary determined over 6 h of magnetic local time around the noon sector and its relationship to the convection pattern. The variation with longitude of the latitude of the radar scatter with cusp characteristics shows a bay-like feature. It is shown that this feature is shaped by the variation with longitude of the poleward flow component of the ionospheric plasma and may be understood in terms of cusp ion time-of-flight effects. Using this interpretation, we derive the time-of-flight of the cusp ions and find that it is consistent with approximately 1 keV ions injected from a subsolar reconnection site. A method for deriving a more accurate estimate of the location of the open-closed field line boundary from HF radar data is described.

    Key words: Ionosphere (ionosphere–magnetosphere interactions; plasma convection · Magnetospheric physics (magnetopause · cusp · and boundary layers

  18. Automated identification of complementarity determining regions (CDRs) reveals peculiar characteristics of CDRs and B cell epitopes.

    Science.gov (United States)

    Ofran, Yanay; Schlessinger, Avner; Rost, Burkhard

    2008-11-01

    Exact identification of complementarity determining regions (CDRs) is crucial for understanding and manipulating antigenic interactions. One way to do this is by marking residues on the antibody that interact with B cell epitopes on the antigen. This, of course, requires identification of B cell epitopes, which could be done by marking residues on the antigen that bind to CDRs, thus requiring identification of CDRs. To circumvent this vicious circle, existing tools for identifying CDRs are based on sequence analysis or general biophysical principles. Often, these tools, which are based on partial data, fail to agree on the boundaries of the CDRs. Herein we present an automated procedure for identifying CDRs and B cell epitopes using consensus structural regions that interact with the antigens in all known antibody-protein complexes. Consequently, we provide the first comprehensive analysis of all CDR-epitope complexes of known three-dimensional structure. The CDRs we identify only partially overlap with the regions suggested by existing methods. We found that the general physicochemical properties of both CDRs and B cell epitopes are rather peculiar. In particular, only four amino acids account for most of the sequence of CDRs, and several types of amino acids almost never appear in them. The secondary structure content and the conservation of B cell epitopes are found to be different than previously thought. These characteristics of CDRs and epitopes may be instrumental in choosing which residues to mutate in experimental search for epitopes. They may also assist in computational design of antibodies and in predicting B cell epitopes.

  19. Determination of the Static Anthropometric Characteristics of Iranian Microscope Users Via Regression Model

    Directory of Open Access Journals (Sweden)

    Toktam Balandeh

    2016-04-01

    Full Text Available Background: Anthropometry is a branch of Ergonomics that considers the measurement and description of the human body dimensions. Accordingly, equipment, environments, and workstations should be designed using user-centered design processes. Anthropometric dimensions differ considerably across gender, race, ethnicity and age, taking into account ergonomic and anthropometric principles. The aim of this study was to determine anthropometric characteristics of microscope users and provide a regression model for anthropometric dimensions. Methods: In this cross-sectional study, anthropometric dimensions (18 dimensions of the microscope users (N=174; 78 males and 96 females in Shiraz were measured. Instruments included a Studio meter, 2 type calipers, adjustable seats, a 40-cm ruler, a tape measure, and scales. The study data were analyzed using SPSS, version 20. Results: The means of male and female microscope users’ age were 31.64±8.86 and 35±10.9 years, respectively and their height were 161.03±6.87cm and 174.81±5.45cm, respectively. The results showed that sitting and standing eye height and sitting horizontal range of accessibility had a significant correlation with stature. Conclusion: The established anthropometric database can be used as a source for designing workstations for working with microscopes in this group of users. The regression analysis showed that three dimensions, i.e. standing eye height, sitting eye height, and horizontal range of accessibility sitting had a significant correlation with stature. Therefore, given one’s stature, these dimensions can be obtained with less measurement.

  20. TO DETERMINATION OF INFLUENCE FOR VARIATIONS IN LASER TREATMENT MODES ON TRIBOLOGICAL CHARACTERISTICS OF CUTTING TOOL

    Directory of Open Access Journals (Sweden)

    O. V. Diachenko

    2016-01-01

    Full Text Available The paper considers problems pertaining to higher durability and reliability of a cutting tool for cutting gastronomic products while using laser processing that leads to resistance increase of material operating surfaces against impact forces. Influence of laser fusion with additional doping on structure, microhardness, wear resistance for adhesive coatings of Fe–B–Cr–Si system has been studied in the paper. In order to solve a problem for selection of optimal qualitative and subsequently quantitative composition of a multi-component coating a mathematical modeling method using Scheffe’s simplex lattices has been used in the paper. Similar tendency for measuring micro-structure of all adhesive coatings fused by laser beams has been established in the paper. Increase in beam speed has caused the following microstructure changes: cast equilibrium, dendrite, supersaturated boride, carbide and boride. Response surface models have been found and they provide the possibility to assess influence quantity of laser processing parameters on microhardness of adhesive coatings obtained by laser doping and intensity of their wear under various conditions for all investigated compositions.It has been ascertained that there is no strict correlation between hardness and intensity of coating wear after laser doping used for adhesive coatings. This testifies to the fact that hardening has taken place not only due to an increase of carbide-boride phase, but also due to matrix hardening.In addition, a regression model for coating composition effect on tribological characteristics of the adhesive coatings has revealed that an optimal composition of a multicomponent coating ensuring maximum wear resistance of coatings constitutes B4C is 2/3 and 1/3 TaB. It has been determined that hardening of the adhesive coating after laser doping while using multicomponent coating occurs not only due to increase of carbide-boridnoy phase, but also due to matrix hardening.

  1. In vivo determination of optical properties and fluorophore characteristics of non-melanoma skin cancer

    Science.gov (United States)

    Rajaram, Narasimhan; Kovacic, Dianne; Migden, Michael F.; Reichenberg, Jason S.; Nguyen, Tri H.; Tunnell, James W.

    2009-02-01

    Diffuse optical spectroscopy (DOS) and laser-induced fluorescence (LIF) techniques have widely been used as noninvasive tools for early cancer detection in several organs including the cervix, oral cavity and gastrointestinal tract. Using a combined DOS/LIF approach, one can simultaneously measure the morphology and biochemical composition of tissue and use these features to diagnose malignancy. We report for the first time to our knowledge both the optical properties and native fluorophore characteristics of non-melanoma skin cancer in the UV-visible range. We collected in vivo diffuse reflectance and intrinsic fluorescence measurements from 44 skin lesions on 37 patients. The skin sites were further categorized into three groups of non-melanoma skin cancer according to histopathology: 1) pre-cancerous actinic keratosis 2) malignant squamous cell carcinoma (SCC) and 3) basal cell carcinoma (BCC). We used a custom-built probe-based clinical system that collects both white light reflectance and laser-induced fluorescence in the wavelength range of 350-700 nm. We extracted the blood volume fraction, oxygen saturation, blood vessel size, tissue microarchitecture and melanin content from diffuse reflectance measurements. In addition, we determined the native fluorophore contributions of NADH, collagen and FAD from laser-induced fluorescence for all groups. The scattering from tissue decreased with progression from clinically normal to precancerous actinic keratosis to malignant SCC. A similar trend was observed for clinically normal skin and malignant BCC. Statistically significant differences were observed in the collagen contributions, which were lower in malignant SCC and BCC as compared to normal skin. Our data demonstrates that the mean optical properties and fluorophore contributions of normal, benign and malignant nonmelanoma cancers are significantly different from each other and can potentially be used as biomarkers for the early detection of skin cancer.

  2. Street characteristics and traffic factors determining road users' exposure to black carbon

    International Nuclear Information System (INIS)

    Dons, Evi; Temmerman, Philip; Van Poppel, Martine; Bellemans, Tom; Wets, Geert; Int Panis, Luc

    2013-01-01

    Many studies nowadays make the effort of determining personal exposure rather than estimating exposure at the residential address only. While intra-urban air pollution can be modeled quite easily using interpolation methods, estimating exposure in transport is more challenging. The aim of this study is to investigate which factors determine black carbon (BC) concentrations in transport microenvironments. Therefore personal exposure measurements are carried out using portable aethalometers, trip diaries and GPS devices. More than 1500 trips, both by active modes and by motorized transport, are evaluated in Flanders, Belgium. GPS coordinates are assigned to road segments to allow BC concentrations to be linked with trip and road characteristics (trip duration, degree of urbanization, road type, traffic intensity, travel speed and road speed). Average BC concentrations on highways (10.7 μg/m 3 ) are comparable to concentrations on urban roads (9.6 μg/m 3 ), but levels are significantly higher than concentrations on rural roads (6.1 μg/m 3 ). Highways yield higher BC exposures for motorists compared to exposure on major roads and local roads. Overall BC concentrations are elevated at lower speeds ( 3 for roads with less than 500 veh/h, up to 12 μg/m 3 for roads with over 2500 veh/h). Traffic intensity proved to be the major explanatory variable for in-vehicle BC exposure, together with timing of the trip and urbanization. For cyclists and pedestrians the range in BC exposure is smaller and models are less predictive; for active modes exposure seems to be influenced by timing and degree of urbanization only. - Highlights: ► Aethalometers, an electronic diary and GPS were used to measure exposure in transport ► More than 1500 trips with active modes and in motorized transport are studied ► Exposure is higher on highways, in urban areas and during traffic peak hours. ► Traffic intensity is the major explanatory variable for in-vehicle BC exposure. ► Exposure

  3. Determination of Sliced Pineapple Drying Characteristics in A Closed Loop Heat Pump Assisted Drying System

    Directory of Open Access Journals (Sweden)

    Cüneyt Tunçkal

    2018-02-01

    Full Text Available Pineapple (Ananascomosus slices were dried with the aid of a heat pump assisted dryer (HPD. During this process, air velocity was kept constant at 1m/s, while air temperatures were changed as 37°C, 40°C and 43°C. The drying air was also circulated by using an axial fan in a closed cycle and fresh air was not allowed into the system. The drying rate and drying time were significantly influenced by drying temperature. It was observed that drying temperatures had significant effects on the drying rate and drying time. During the conduct of the study, pineapple slices were dried at 37, 40 and 43°C for 465, 360 and 290 min, respectively. The specific moisture extraction ratio (SMER values were observed to change as drying temperatures were changed. The drying rate curves indicated that the whole drying process occurred in the falling rate period. Seven well-known thin-layer models (Lewis, Henderson &Pabis, Logarithmic, Page, Midilli & Kucuk, Weibull and Aghbashlo et al. were employed to make a prediction about drying kinetics through nonlinear regression analysis. The Midilli & Kucuk and Aghbashlo et al. models were consistent with the experimental data. Fick’s second law of diffusion was used to determine the moisture diffusivity coefficient ranging from 3.78×10–9 to 6.57×10-9  m2/s the each of the above mentioned temperatures. The dependence of effective diffusivity coefficient on temperature was defined by means a fan Arrhenius type equation. The activation energy of moisture diffusion was found to be 75.24kJ/mol.   Article History: Received: July 18th 2017; Received: October 27th 2017; Accepted: January 16th 2018; Available online How to Cite This Article: Tunçkal, C., Coşkun, S., Doymaz, I. and Ergun, E. (2018 Determination of Sliced Pineapple Drying Characteristics in A Closed Loop Heat Pump Assisted Drying System. International Journal of Renewable Energy Development, 7(1, 35-41. https://doi.org/10.14710/ijred.7.1.35-41

  4. Determination of the onset nonlinearity hydrodynamic characteristics at two-phase flow in parallel vertical channels

    International Nuclear Information System (INIS)

    Jovic, V.; Afgan, N.; Jovic, L.; Spasojevic, D.

    1993-01-01

    The paper presents results of the experimental and theoretical analyses of linear and nonlinear characteristics of adiabatic two-phase water-air flow in vertical parallel channels. Regime character changes and linear to nonlinear dynamic characteristics transfer conditions were defined. (author)

  5. Nasopharyngeal carcinomas: analysis of patient, tumor and treatment characteristics determining outcome

    International Nuclear Information System (INIS)

    Erkal, Haldun S.; Serin, Meltem; Cakmak, Ahmet

    2001-01-01

    Purpose: The present study reviews the experience in treatment of 447 patients with nasopharyngeal carcinomas, analyzing patient, tumor and treatment characteristics determining outcome. Materials and methods: There were 322 males and 125 females, their ages ranging from 7 to 85 years (median, 45 years). Two-hundred and seventy-two patients had World Health Organization (WHO) type 3 carcinomas, 123 patients had T4 tumors and 320 patients had metastatic cervical lymph nodes. Three-hundred and eight patients were treated with radiation therapy alone and 139 patients with chemotherapy in combination with radiation therapy. Cumulative radiation dose to primary tumor ranged from 50 to 76 Gy (median, 70 Gy) and radiation dose to metastatic cervical lymph nodes ranged from 46 to 74 Gy (median, 66 Gy). Results: Follow-up ranged from 0.1 to 19.5 years (mean, 7.6 years). Local complete response was achieved in 357 patients. In multivariate analysis, T-classification, cumulative radiation dose to primary tumor and treatment with chemotherapy in combination with radiation therapy predicted local response. Nodal complete response was achieved in 272 patients. In multivariate analysis, N-classification and radiation dose to metastatic cervical lymph nodes predicted nodal response. Local failure was observed in 70 patients, nodal failure in 35 patients and systemic failure in 114 patients. Overall survival, disease-free survival and disease-specific survival were 33, 32 and 37%, respectively, at 10 years. In multivariate analysis, age, T-classification, N-classification, radiation dose and treatment with chemotherapy in combination with radiation therapy predicted overall survival whereas T-classification, N-classification, radiation dose and treatment with chemotherapy in combination with radiation therapy predicted both disease-free survival and disease-specific survival. Conclusions: Radiation therapy alone appears to be an adequate and viable treatment for patients with early

  6. Personal circumstances and social characteristics as determinants of landholder participation in biodiversity conservation programs.

    Science.gov (United States)

    Moon, Katie; Marshall, Nadine; Cocklin, Chris

    2012-12-30

    Adequate conservation of biodiversity on private land remains elusive due, in part, to a failure to understand the personal circumstances and social characteristics of private landholders. Our aim was to identify those personal and social dimensions of landholders that might contribute to improved conservation policy and program design and, thereby, participation in private land conservation. We tested whether personal circumstances of landholders (e.g., lifestyle and wellbeing, information and knowledge, financial security) and social characteristics (e.g., attitudes, norms, and trust) would be important predictors of landholders' capacity and willingness to participate in biodiversity conservation programs. Forty-five participants and twenty-nine non-participants of biodiversity conservation programs in north Queensland, Australia, were surveyed to: 1) examine differences between their personal circumstances and social characteristics that may influence participation; and 2) explore whether personal circumstances and social characteristics were influenced by participation. The results revealed that, compared to participants, non-participants in conservation programs had significantly different personal circumstances and social characteristics for four of eight measured variables. Compared to participants, non-participants demonstrated a reduced capacity and willingness to participate in conservation programs. Participation did not appear to have a strong influence on participants' personal circumstances or social characteristics, and when social norms supported conservation, programs did not demonstrate additionality. Conservation policies that maintain or improve landholders' personal circumstances and that promote pro-environmental norms may result in increased participation and thereby conservation outcomes. Copyright © 2012 Elsevier Ltd. All rights reserved.

  7. Cochlear implant-related three-dimensional characteristics determined by micro-computed tomography reconstruction.

    Science.gov (United States)

    Ni, Yusu; Dai, Peidong; Dai, Chunfu; Li, Huawei

    2017-01-01

    To explore the structural characteristics of the cochlea in three-dimensional (3D) detail using 3D micro-computed tomography (mCT) image reconstruction of the osseous labyrinth, with the aim of improving the structural design of electrodes, the selection of stimulation sites, and the effectiveness of cochlear implantation. Three temporal bones were selected from among adult donors' temporal bone specimens. A micro-CT apparatus (GE eXplore) was used to scan three specimens with a voxel resolution of 45 μm. We obtained about 460 slices/specimen, which produced abundant data. The osseous labyrinth images of three specimens were reconstructed from mCT. The cochlea and its spiral characteristics were measured precisely using Able Software 3D-DOCTOR. The 3D images of the osseous labyrinth, including the cochlea, vestibule, and semicircular canals, were reconstructed. The 3D models of the cochlea showed the spatial relationships and surface structural characteristics. Quantitative data concerning the cochlea and its spiral structural characteristics were analyzed with regard to cochlear implantation. The 3D reconstruction of mCT images clearly displayed the detailed spiral structural characteristics of the osseous labyrinth. Quantitative data regarding the cochlea and its spiral structural characteristics could help to improve electrode structural design, signal processing, and the effectiveness of cochlear implantation. Clin. Anat. 30:39-43, 2017. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  8. A two-stage procedure for determining unsaturated hydraulic characteristics using a syringe pump and outflow observations

    DEFF Research Database (Denmark)

    Wildenschild, Dorthe; Jensen, Karsten Høgh; Hollenbeck, Karl-Josef

    1997-01-01

    A fast two-stage methodology for determining unsaturated flow characteristics is presented. The procedure builds on direct measurement of the retention characteristic using a syringe pump technique, combined with inverse estimation of the hydraulic conductivity characteristic based on one......-step outflow experiments. The direct measurements are obtained with a commercial syringe pump, which continuously withdraws fluid from a soil sample at a very low and accurate how rate, thus providing the water content in the soil sample. The retention curve is then established by simultaneously monitoring......-step outflow data and the independently measured retention data are included in the objective function of a traditional least-squares minimization routine, providing unique estimates of the unsaturated hydraulic characteristics by means of numerical inversion of Richards equation. As opposed to what is often...

  9. Determination of the integral characteristics of an asymmetrical thermal plume from air speed/velocity and temperature measurements

    DEFF Research Database (Denmark)

    Zukowska, Daria; Popiolek, Zbigniew; Melikov, Arsen Krikor

    2010-01-01

    , generated by a thermal manikin resembling the complex body shape and heat generated by a sitting person, were measured. Using the measured data, the integral characteristics of the generated asymmetrical thermal plume were calculated by the ADI-method, and the uncertainty in determination...

  10. Determination and Comparison of Physical and Physiological Characteristics of Football Players in the U10-17 Categories

    Science.gov (United States)

    Göksu, Omercan; Yüksek, Selami

    2018-01-01

    This study was conducted to determine some motoric characteristics of children football players in the 10-17 age group and to compare them according to their playing positions. The study was carried out with voluntary participation of a total of 190 licensed athletes in Turkey Football Federation "U" category playing in Çeliktepe,…

  11. Determining soil hydrologic characteristics on a remote forest watershed by continuous monitoring of soil water pressures, rainfall and runoff.

    Science.gov (United States)

    L.R. Ahuja; S. A. El-Swaify

    1979-01-01

    Continuous monitoring of soil-water pressures, rainfall and runoff under natural conditions was tested as a technique for determining soil hydrologic characteristics of a remote forest watershed plot. A completely battery-powered (and thus portable) pressure transducer–scanner–recorder system was assembled for monitoring of soil-water pressures in...

  12. Determination of deformation and strength characteristics of artificial geomaterial having step-shaped discontinuities under uniaxial compression

    Science.gov (United States)

    Tsoy, PA

    2018-03-01

    In order to determine the empirical relationship between the linear dimensions of step-shaped macrocracks in geomaterials as well as deformation and strength characteristics of geomaterials (ultimate strength, modulus of deformation) under uniaxial compression, the artificial flat alabaster specimens with the through discontinuities have been manufactured and subjected to a series of the related physical tests.

  13. Comparison of protein fermentation characteristics in rumen fluid determined with the gas production technique and the nylon bag technique

    NARCIS (Netherlands)

    Cone, J.W.; Rodrigues, M.A.M.; Guedes, C.M.; Blok, M.C.

    2009-01-01

    In this study, a modified version of the gas production technique was used to determine protein fermentation characteristics in rumen fluid of 19 feedstuffs. Performing the incubations in a N-free environment, and with an excess of rapidly fermentable carbohydrates, made N the limiting factor to

  14. Determination of Characteristic Peroids of Suppression of Thermal Decomposition Reaction of Forest Fuel Material by Specialized Software

    Directory of Open Access Journals (Sweden)

    Gumerov Vladislav M.

    2015-01-01

    Full Text Available Experimental studies determining periods of suppression of thermal decomposition reaction of forest combustible materials was carried out by high-speed, cross-correlation cameras and panoramic techniques PIV and IPI under influence of water steam. Conditions and characteristics of reaction termination of thermal decomposition of forest combustible materials under reaction with steam cloud were defined.

  15. Discriminant analysis of characteristics determining acceptance or rejection of nuclear power

    International Nuclear Information System (INIS)

    Holsapple, C.W.; Whinston, A.B.

    1977-01-01

    This study utilizes the linear discriminant model to analyze demographic and attitudinal data concerning the construction of a nuclear power facility at the Bailly site in northern Indiana. The objective is to ascertain the extent to which various respondent characteristics are useful in distinguishing among respondent attitudes (opposed, in favor, unsure) toward the Bailly project. Examination of reduced space characteristics leads the authors to postulate an interpretation of its two dimensions as respondent uncertainty and respondent resistance. The largest contributor (positive) to uncertainty was found to be a divorced or separated marital status; the greatest contributer (negative) to resistance was found to be home ownership. Both of these respondent characteristics were significant in the univariate sense. A particularly striking trend was the reliance of the opposed group upon electronic media as the source of most local news, whereas the other two groups tended to rely most heavily on newspapers

  16. Determining Topographic and Some Physical Characteristics of the Land in Artvin City and Investigating Relationship between These Characteristics with Land Cover

    Directory of Open Access Journals (Sweden)

    Ayşe Yavuz Özalp

    2013-11-01

    Full Text Available In this study, the aim was to determine topographic (elevation, slope, and aspect and some physical (Great Soil Groups (GSG and Land Use Capability Classes (LUCC characteristics of the land in Artvin and to reveal relations between these characteristics and land cover of the city that lies along the northeast border of Turkey and due to its natural resources, consists of several protected areas as well as many development projects -both planned and ongoing. Within this scope, areal and percentile distributions in respect to slope, aspect, elevation, GSG, LUCC and land cover were determined for eight towns of Artvin using digitized 1/25000 topographic and soil maps along with CORINE 2006 land cover map with the help of Geographical Information System (GIS. Then, distributions of chosen land use types (forest, agriculture, grassland/meadow were investigated according to the determined-ranges for the parameters of slope, aspect, elevation, GSG, and LUCC. The results showed that about 48.22% of Artvin’s whole land is between an elevation ranges of 1000 – 2000 m while 31.07% of the land lies above 2000 m. Moreover, average elevation of all the towns, except for Hopa, is over the country’s mean elevation of 1132 m and 81.25% of the city’s land consists of more than 30% slope, meaning that topography of the land in Artvin

  17. Study to forecast and determine characteristics of world satellite communications market

    Science.gov (United States)

    Filep, R. T.; Schnapf, A.; Fordyce, S. W.

    1983-01-01

    The world commercial communications satellite market during the spring and summer of 1983 was examined and characteristics and forecasts of the market extending to the year 2000 were developed. Past, present and planned satellites were documented in relation to frequencies, procurement and launch dates, costs, transponders, and prime contractor. Characteristics of the market are outlined for the periods 1965 - 1985, 1986 - 1989, and 1990 - 2000. Market share forecasts, discussions of potential competitors in various world markets, and profiles of major communication satellite manufacturing and user countries are documented.

  18. Characteristics of eye-position gain field populations determine geometry of visual space

    Directory of Open Access Journals (Sweden)

    Sidney R Lehky

    2016-01-01

    Full Text Available We have previously demonstrated differences in eye-position spatial maps for anterior inferotemporal cortex (AIT in the ventral stream and lateral intraparietal cortex (LIP in the dorsal stream, based on population decoding of gaze angle modulations of neural visual responses (i.e., eye-position gain fields. Here we explore the basis of such spatial encoding differences through modeling of gain field characteristics. We created a population of model neurons, each having a different eye-position gain field. This population was used to reconstruct eye-position visual space using multidimensional scaling. As gain field shapes have never been well established experimentally, we examined different functions, including planar, sigmoidal, elliptical, hyperbolic, and mixtures of those functions. All functions successfully recovered positions, indicating weak constraints on allowable gain field shapes. We then used a genetic algorithm to modify the characteristics of model gain field populations until the recovered spatial maps closely matched those derived from monkey neurophysiological data in AIT and LIP. The primary differences found between model AIT and LIP gain fields were that AIT gain fields were more foveally dominated. That is, gain fields in AIT operated on smaller spatial scales and smaller dispersions than in LIP. Thus we show that the geometry of eye-position visual space depends on the population characteristics of gain fields, and that differences in gain field characteristics for different cortical areas may underlie differences in the representation of space.

  19. Determination of thermal characteristics of standard and improved hollow concrete blocks using different measurement techniques

    DEFF Research Database (Denmark)

    Caruana, C.; Yousif, C.; Bacher, Peder

    2017-01-01

    The lighter weight, improved thermal properties and better acoustic insulation of hollow-core concrete blocks are few of the characteristics that one encounters when comparing them to traditional Maltese globigerina limestone solid blocks. As a result, hollow concrete blocks have recently been...

  20. Electrofracturing test system and method of determining material characteristics of electrofractured material samples

    Science.gov (United States)

    Bauer, Stephen J.; Glover, Steven F.; Pfeifle, Tom; Su, Jiann-Cherng; Williamson, Kenneth Martin; Broome, Scott Thomas; Gardner, William Payton

    2017-08-01

    A device for electrofracturing a material sample and analyzing the material sample is disclosed. The device simulates an in situ electrofracturing environment so as to obtain electrofractured material characteristics representative of field applications while allowing permeability testing of the fractured sample under in situ conditions.

  1. Interaction Between Physical Environment, Social Environment, and Child Characteristics in Determining Physical Activity at Child Care

    NARCIS (Netherlands)

    Gubbels, J.S.; Kremers, S.P.J.; Kann, D.H.H. van; Stafleu, A.; Candel, M.J.J.M.; Dagnelie, P.C.; Thijs, C.; Vries, N.K.de

    2011-01-01

    Objective: To investigate the association between the child-care environment and physical activity of 2- and 3-year-olds. Based on an ecological view of environmental influences on health behavior, we hypothesized that the social and physical environment, as well as child characteristics (age and

  2. Identification of protective pneumococcal T(H17 antigens from the soluble fraction of a killed whole cell vaccine.

    Directory of Open Access Journals (Sweden)

    Kristin L Moffitt

    Full Text Available Mucosal or parenteral immunization with a killed unencapsulated pneumococcal whole cell antigen (WCA with an adjuvant protects mice from colonization by a T(H17 CD4+ cell-mediated mechanism. Using preparative SDS gels, we separated the soluble proteins that compose the WCA in order to identify fractions that were immunogenic and protective. We screened these fractions for their ability to stimulate IL-17A secretion from splenocytes obtained from mice immunized with WCA and adjuvant. We identified 12 proteins within the stimulatory fractions by mass spectrometry; these proteins were then cloned, recombinantly expressed and purified using an Escherichia coli expression system. The ability of these proteins to induce IL-17A secretion was then evaluated by stimulation of mouse splenocytes. Of the four most stimulatory proteins, three were protective in a mouse pneumococcal serotype 6B colonization model. This work thus describes a method for identifying immunogenic proteins from the soluble fraction of pneumococcus and shows that several of the proteins identified protect mice from colonization when used as mucosal vaccines. We propose that, by providing protection against pneumococcal colonization, one or more of these proteins may serve as components of a multivalent pneumococcal vaccine.

  3. Ideality factor of GaN-based light-emitting diodes determined by the measurement of photovoltaic characteristics

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyun-Joong; Ryu, Geun-Hwan; Yang, Won-Bo; Ryu, Han-Youl [Inha University, Incheon (Korea, Republic of)

    2014-11-15

    We present a method for determining the ideality factor of GaN-based light-emitting diodes (LEDs) by using the measured photovoltaic characteristics. The relation between the short-circuit current and the open-circuit voltage is obtained as the incident power of a laser diode emitting at 405 nm is varied, which is used to determine the ideality factor of the LED. From the photovoltaic measurements, the ideality factors of a blue and a green LED are determined to be 1.16 and 1.78, respectively. The ideality factors obtained by using the photovoltaic measurement are found to be much smaller than those obtained by using the I - V curve without illumination, which is believed to result from the different carrier generation and transport mechanisms. Investigating the photovoltaic characteristics of GaN-based LEDs is expected to provide insight into the origin of the high diode ideality factor in GaN-based devices.

  4. Ideality factor of GaN-based light-emitting diodes determined by the measurement of photovoltaic characteristics

    International Nuclear Information System (INIS)

    Kim, Hyun-Joong; Ryu, Geun-Hwan; Yang, Won-Bo; Ryu, Han-Youl

    2014-01-01

    We present a method for determining the ideality factor of GaN-based light-emitting diodes (LEDs) by using the measured photovoltaic characteristics. The relation between the short-circuit current and the open-circuit voltage is obtained as the incident power of a laser diode emitting at 405 nm is varied, which is used to determine the ideality factor of the LED. From the photovoltaic measurements, the ideality factors of a blue and a green LED are determined to be 1.16 and 1.78, respectively. The ideality factors obtained by using the photovoltaic measurement are found to be much smaller than those obtained by using the I - V curve without illumination, which is believed to result from the different carrier generation and transport mechanisms. Investigating the photovoltaic characteristics of GaN-based LEDs is expected to provide insight into the origin of the high diode ideality factor in GaN-based devices.

  5. Review of the SCDAP/RELAP5/MOD3.1 code structure and core T/H model before core damage

    International Nuclear Information System (INIS)

    Kim, See Darl; Kim, Dong Ha

    1998-04-01

    The SCDAP/RELAP5 code has been developed for best estimate transient simulation of light water reactor coolant systems during a severe accident. The code is being developed at the INEL under the primary sponsorship of the Office of Nuclear Regulatory Research of the U.S. NRC. As The current time, the SCDAP/RELAP5/MOD3.1 code is the result of merging the RELAP5/MOD3 and SCDAP models. The code models the coupled behavior of the reactor coolant system, core, fission product released during a severe accident transient as well as large and small break loss of coolant accidents, operational transients such as anticipated transient without SCRAM, loss of offsite power, loss of feedwater, and loss of flow. Major purpose of the report is to provide information about the characteristics of SCDAP/RELAP5/MOD3.1 core T/H models for an integrated severe accident computer code being developed under the mid/long-term project. This report analyzes the overall code structure which consists of the input processor, transient controller, and plot file handler. The basic governing equations to simulate the thermohydraulics of the primary system are also described. As the focus is currently concentrated in the core, core nodalization parameters of the intact geometry and the phenomenological subroutines for the damaged core are summarized for the future usage. In addition, the numerical approach for the heat conduction model is investigated along with heat convection model. These studies could provide a foundation for input preparation and model improvement. (author). 6 refs., 3 tabs., 4 figs

  6. The adsorption characteristics and porous structure of bentonite adsorbents as determined from the adsorption isotherms of benzene vapor

    Directory of Open Access Journals (Sweden)

    LEPA STOJANOVSKA

    2004-02-01

    Full Text Available The adsorption of benzene vapor on natural and acid activated bentonites was treated by the theory of volume filling of micropores. The micropore volume and characteristic values of the free energy of adsorption were determined from the adsorption isotherms. The Dubinin–Radushkevish–Stoeckli and Dubinin–Astakhov equations were used for this purpose. The results showed that natural bentonite has a more homogeneous micropore structure than the acid activated ones. The characteristic values of the free energy of adsorption for the natural bentonite were higher than those of the acid activated bentonite. This is due to differences in its structure and the pore size.

  7. What should we be selecting for? A systematic approach for determining which personal characteristics to assess for during admissions

    Directory of Open Access Journals (Sweden)

    Conlon Peter

    2012-11-01

    Full Text Available Abstract Background Admission committees are responsible for creating fair, defensible, reliable, and valid processes that assess those attributes considered important for professional success. There is evidence for the continuing use of academic ability as a selection criterion for health professional schools; however, there is little evidence for the reliability and validity of measures currently in place to assess personal characteristics. The Ontario Veterinary College (OVC initiated a review of its admissions criteria in order to implement an evidence-based method to determine which characteristics veterinary stakeholders consider important to assess for admission. Methods Eleven characteristics were identified by the OVC Admissions Committee and a survey was sent to all licensed veterinarians in Ontario (n=4,068, OVC students (n=450, and OVC faculty, interns and residents (n=192. A paired comparison method was used to identify the relative rank order of the characteristics, and multivariate analysis of variance with post hoc analyses was used to determine between group differences in the returned survey data. Results Surveys were returned from 1,312 participants (27.86% response rate; female 59.70%. The relative rank of the characteristics was reasonably consistent among participant groups, with ethical behaviour, sound judgment, communication, and critical and creative thinking being ranked as the top four. However, the importance of certain characteristics like communication and empathy were perceived differently by groups. For instance, females scored communication (F(1, 1289 = 20.24, p d = .26 and empathy (F(1, 1289 = 55.41, p d = 0.42 significantly higher than males, while males scored knowledge of profession (F(1, 1289 = 12.81, p d = 0.20, leadership (F(1, 1289 = 10.28, p = .001, d = 0.18, and sound judgment (F(1, 1289 = 13.56, p d = 0.21 significantly higher than females. Conclusions The data from the paired comparison method

  8. Determinants of CEO Turnover in Publicand Private Firms in Denmark - CEO and Firm Characteristics

    DEFF Research Database (Denmark)

    Sponholtz, Carina

    In this study we are the first to draw on longitudinal matched employer-employee data to study CEO turnover. Using this data we contribute tothe existing literature by examining the e¤ect of previously unstudied in-dividual characteristics on CEO turnover. Additionally, we are able toexamine CEO...... turnover. Finally, the inverse relationshipbetween firm performance and CEO turnover only exists in LLL firms(larger limited liability firms, both publicly and privately held), whereagency costs are assumed and found to be highest.In this study we are the first to draw on longitudinal matched employer-employee...... turnover across a variety of firm types that di¤er with re-spect to the corporate governance issues they face. Our simple methodol-ogy to define CEO turnover results in turnover rates similar to those foundpreviously. Our results indicate that CEO characteristics are an important factor in explaining CEO...

  9. Determining firm characteristics and the level of voluntary corporate governance disclosures among Malaysian listed property companies

    OpenAIRE

    Talpur Shabana; Lizam Mohd; Keerio Nazia

    2018-01-01

    This study examined the level of voluntary corporate governance disclosures and the influence of firm characteristics (i.e., firm size, firm age, and firm market listing) on the level of these disclosures among Malaysian property listed companies. The check-list to measure the voluntary corporate governance disclosures was adopted from Malaysian corporate governance index 2011 by Minority Shareholder Watchdog Group (MSWG). The voluntary corporate governance disclosure practices and firm speci...

  10. Determination of biomechanical characteristics of dentine and dental enamel in vitro

    OpenAIRE

    UTYUZH ANATOLIJ SERGEEVICH; YUMASHEV ALEKSEJ VALERIEVICH; ZAGORSKY VLADISLAV VALERIEVICH; ZAKHAROV ALEKSEJ NIKOLAEVICH; NEFEDOVA IRINA VALERIEVNA

    2016-01-01

    Hardness characteristics of the hard tissues of a tooth are widely used in dentistry practice, both in diagnostics and in therapy, they are also very important for individual selection of restoration and other specialized materials. During examination of enamel and dentine hardness, it is very important to handle information that beside its theoretical value also has high practical value. For this purpose, we suggest to calculate hardness of tooth tissue on the basis of quantitative indicator...

  11. Determination of the characteristics of an electric arc plasma contaminated by vapors from insulators

    International Nuclear Information System (INIS)

    Abbaoui, M.; Cheminat, B.

    1991-01-01

    An experimental study at atmospheric pressure carried out on plasma penetrated by vapors from different industrial insulators allowed the showing of the influence of the nature of the insulator upon the characteristics of the electric arc plasma; i.e., an increase of the temperature, electron density, electric field, and extinction velocity of the arc. Measurements have been made spectrometrically and by means of probes

  12. The associations between objectively-determined and self-reported urban form characteristics and neighborhood-based walking in adults.

    Science.gov (United States)

    Jack, Elizabeth; McCormack, Gavin R

    2014-06-04

    Self-reported and objectively-determined neighborhood built characteristics are associated with physical activity, yet little is known about their combined influence on walking. This study: 1) compared self-reported measures of the neighborhood built environment between objectively-determined low, medium, and high walkable neighborhoods; 2) estimated the relative associations between self-reported and objectively-determined neighborhood characteristics and walking and; 3) examined the extent to which the objectively-determined built environment moderates the association between self-reported measures of the neighborhood built environment and walking. A random cross-section of 1875 Canadian adults completed a telephone-interview and postal questionnaire capturing neighborhood walkability, neighborhood-based walking, socio-demographic characteristics, walking attitudes, and residential self-selection. Walkability of each respondent's neighborhood was objectively-determined (low [LW], medium [MW], and high walkable [HW]). Covariate-adjusted regression models estimated the associations between weekly participation and duration in transportation and recreational walking and self-reported and objectively-determined walkability. Compared with objectively-determined LW neighborhoods, respondents in HW neighborhoods positively perceived access to services, street connectivity, pedestrian infrastructure, and utilitarian and recreation destination mix, but negatively perceived motor vehicle traffic and crime related safety. Compared with residents of objectively-determined LW neighborhoods, residents of HW neighborhoods were more likely (p spend more time, per week (193 min/wk) transportation walking. Perceived access to services, street connectivity, motor vehicle safety, and mix of recreational destinations were also significantly associated with transportation walking. With regard to interactions, HW x utilitarian destination mix was positively associated with

  13. 1,25-Dihydroxyvitamin D3 inhibits the differentiation and migration of T(H17 cells to protect against experimental autoimmune encephalomyelitis.

    Directory of Open Access Journals (Sweden)

    Jae-Hoon Chang

    Full Text Available BACKGROUND: Vitamin D(3, the most physiologically relevant form of vitamin D, is an essential organic compound that has been shown to have a crucial effect on the immune responses. Vitamin D(3 ameliorates the onset of the experimental autoimmune encephalomyelitis (EAE; however, the direct effect of vitamin D(3 on T cells is largely unknown. METHODOLOGY/PRINCIPAL FINDINGS: In an in vitro system using cells from mice, the active form of vitamin D(3 (1,25-dihydroxyvitamin D(3 suppresses both interleukin (IL-17-producing T cells (T(H17 and regulatory T cells (Treg differentiation via a vitamin D receptor signal. The ability of 1,25-dihydroxyvitamin D(3 (1,25(OH(2D(3 to reduce the amount of IL-2 regulates the generation of Treg cells, but not T(H17 cells. Under T(H17-polarizing conditions, 1,25(OH(2D(3 helps to increase the numbers of IL-10-producing T cells, but 1,25(OH(2D(3's negative regulation of T(H17 development is still defined in the IL-10(-/- T cells. Although the STAT1 signal reciprocally affects the secretion of IL-10 and IL-17, 1,25(OH(2D(3 inhibits IL-17 production in STAT1(-/- T cells. Most interestingly, 1,25(OH(2D(3 negatively regulates CCR6 expression which might be essential for T(H17 cells to enter the central nervous system and initiate EAE. CONCLUSIONS/SIGNIFICANCE: Our present results in an experimental murine model suggest that 1,25(OH(2D(3 can directly regulate T cell differentiation and could be applied in preventive and therapeutic strategies for T(H17-mediated autoimmune diseases.

  14. Determinants of success in Shared Savings Programs: An analysis of ACO and market characteristics.

    Science.gov (United States)

    Ouayogodé, Mariétou H; Colla, Carrie H; Lewis, Valerie A

    2017-03-01

    Medicare's Accountable Care Organization (ACO) programs introduced shared savings to traditional Medicare, which allow providers who reduce health care costs for their patients to retain a percentage of the savings they generate. To examine ACO and market factors associated with superior financial performance in Medicare ACO programs. We obtained financial performance data from the Centers for Medicare and Medicaid Services (CMS); we derived market-level characteristics from Medicare claims; and we collected ACO characteristics from the National Survey of ACOs for 215 ACOs. We examined the association between ACO financial performance and ACO provider composition, leadership structure, beneficiary characteristics, risk bearing experience, quality and process improvement capabilities, physician performance management, market competition, CMS-assigned financial benchmark, and ACO contract start date. We examined two outcomes from Medicare ACOs' first performance year: savings per Medicare beneficiary and earning shared savings payments (a dichotomous variable). When modeling the ACO ability to save and earn shared savings payments, we estimated positive regression coefficients for a greater proportion of primary care providers in the ACO, more practicing physicians on the governing board, physician leadership, active engagement in reducing hospital re-admissions, a greater proportion of disabled Medicare beneficiaries assigned to the ACO, financial incentives offered to physicians, a larger financial benchmark, and greater ACO market penetration. No characteristic of organizational structure was significantly associated with both outcomes of savings per beneficiary and likelihood of achieving shared savings. ACO prior experience with risk-bearing contracts was positively correlated with savings and significantly increased the likelihood of receiving shared savings payments. In the first year, performance is quite heterogeneous, yet organizational structure does not

  15. 30 CFR 250.407 - What tests must I conduct to determine reservoir characteristics?

    Science.gov (United States)

    2010-07-01

    ... Gas Drilling Operations General Requirements § 250.407 What tests must I conduct to determine... of oil, gas, sulphur, and water in the formations penetrated by logging, formation sampling, or well...

  16. BDTs in the Search for $\\mathrm{t \\bar{t} H}$ Production with Higgs Decays to $\\mathrm{b\\bar{b}}$ at ATLAS

    CERN Document Server

    Glaysher, Paul; The ATLAS collaboration

    2017-01-01

    An observation of Higgs boson production in association with a top quark pair ($\\mathrm{t \\bar{t} H}$) provides a direct measurement of the top quark Yukawa coupling and probes the Standard Model. The ATLAS search for $\\mathrm{t \\bar{t} H}$, $\\mathrm{H\\rightarrow b\\bar{b}}$ relies on Boosted Decision Trees for Higgs reconstruction and signal-background discrimination, which is presented for the preliminary results on the $\\sqrt{s}=$~13~TeV dataset.

  17. Too big or too narrow? Disturbance characteristics determine the functional resilience in virtual microbial ecosystems

    Science.gov (United States)

    König, Sara; Firle, Anouk-Letizia; Koehnke, Merlin; Banitz, Thomas; Frank, Karin

    2017-04-01

    In general ecology, there is an ongoing debate about the influence of fragmentation on extinction thresholds. Whether this influence is positive or negative depends on the considered type of fragmentation: whereas habitat fragmentation often has a negative influence on population extinction thresholds, spatially fragmented disturbances are observed to have mostly positive effects on the extinction probability. Besides preventing population extinction, in soil systems ecology we are interested in analyzing how ecosystem functions are maintained despite disturbance events. Here, we analyzed the influence of disturbance size and fragmentation on the functional resilience of a microbial soil ecosystem. As soil is a highly heterogeneous environment exposed to disturbances of different spatial configurations, the identification of critical disturbance characteristics for maintaining its functions is crucial. We used the numerical simulation model eColony considering bacterial growth, degradation and dispersal for analyzing the dynamic response of biodegradation examplary for an important microbial ecosystem service to disturbance events of different spatial configurations. We systematically varied the size and the degree of fragmentation of the affected area (disturbance pattern). We found that the influence of the disturbance size on functional recovery and biodegradation performance highly depends on the spatial fragmentation of the disturbance. Generally, biodegradation performance decreases with increasing clumpedness and increasing size of the affected area. After spatially correlated disturbance events, biodegradation performance decreases linear with increasing disturbance size. After spatially fragmented disturbance events, on the other hand, an increase in disturbance size has no influence on the biodegradation performance until a critical disturbance size is reached. Is the affected area bigger than this critical size, the functional performance decreases

  18. Isolation and determination of cultural characteristics of a new highly CO2 tolerant fresh water microalgae

    International Nuclear Information System (INIS)

    Yue Lihong; Chen Weigong

    2005-01-01

    Fresh water microalgae, which has high CO 2 tolerance, were isolated and its cultural characteristics were investigated. The ZY-1 strain was identified as genus Chlorella. It showed maximum growth at 10% (v/v) CO 2 enriched air flowing condition, and a good growth rate in a broad range of physically controllable conditions, including CO 2 concentration up to 70% (v/v), CO 2 enriched air flow rate, temperature and pH value. The results indicated the feasibility of the ZY-1 strain for fixing CO 2 from stack gases

  19. Chlorpyrifos Exposure and Urban Residential Environment Characteristics as Determinants of Early Childhood Neurodevelopment

    Science.gov (United States)

    Quinn, James W.; Rauh, Virginia A.; Perera, Frederica P.; Andrews, Howard F.; Garfinkel, Robin; Hoepner, Lori; Whyatt, Robin; Rundle, Andrew

    2011-01-01

    Objectives. We evaluated whether neighborhood characteristics correlated with early neurodevelopment and whether these characteristics confounded the previously reported association between exposure to chlorpyrifos (an organophosphate insecticide) and neurodevelopment. Methods. We obtained prenatal addresses, chlorpyrifos exposure data, and 36-month Psychomotor Development Index (PDI) and Mental Development Index (MDI) scores for a birth cohort in New York City (born 1998–2002). We used data from the 2000 US Census to estimate measures of physical infrastructure, socioeconomic status, crowding, demographic composition, and linguistic isolation for 1-kilometer network areas around each child's prenatal address. Generalized estimating equations were adjusted for demographics, maternal education and IQ, prenatal exposure to tobacco smoke, caretaking environment quality, and building dilapidation. Results. Of 266 children included as participants, 47% were male, 59% were Dominican, and 41% were African American. For each standard deviation higher in neighborhood percent poverty, the PDI score was 2.6 points lower (95% confidence interval [CI] = −3.7, −1.5), and the MDI score was 1.7 points lower (95% CI = −2.6, −0.8). Neighborhood-level confounding of the chlorpyrifos-neurodevelopment association was not apparent. Conclusions. Neighborhood context and chlorpyrifos exposure were independently associated with neurodevelopment, thus providing distinct opportunities for health promotion. PMID:20299657

  20. Determination and analysis of the physical chemical characteristics of witness coupons of boral for the CNLV

    International Nuclear Information System (INIS)

    Gonzalez M, J.L.; Aguilar H, F.; Rivero G, T.; Carrillo M, R.

    2004-01-01

    The burnt fuel elements that are extracted in each charging of the Units 1 and 2 of the Nuclear Power Plant of Laguna Verde, are deposited in shelves placed in the storage reservoir designed for this end. Each cell or storage shelf has a structure type cage. Among the cells neutron absorber material is placed, (Boral), what allows to avoid the possible criticality that could settle down when accumulating in the storage the irradiated fuel elements. This boral has been designed to maintain its characteristics of thermal neutron absorber during a lifetime of the plant. To check that the wings and the Boral have not suffered some degradation or some change due to the environmental conditions in the warehouse, it is necessary to watch over their physical and chemical characteristics periodically, what is carried out by a surveillance program based on Badges or manufactured witness coupons of the same material that the wings. The badges witness are embedded in a special wing, which is placed in the place with more radiation in the pool. In this work the laboratory tests carried out in the ININ to the coupon witness 03 of the Unit 2, (II-03) are described, being presented the results and obtained conclusions. (Author)

  1. A firefly algorithm approach for determining the parameters characteristics of solar cell

    Directory of Open Access Journals (Sweden)

    Mohamed LOUZAZNI

    2017-12-01

    Full Text Available A metaheuristic algorithm is proposed to describe the characteristics of solar cell. The I-V characteristics of solar cell present double nonlinearity in the presence of exponential and in the five parameters. Since, these parameters are unknown, it is important to predict these parameters for accurate modelling of I-V and P-V curves of solar cell. Moreover, firefly algorithm has attracted the intention to optimize the non-linear and complex systems, based on the flashing patterns and behaviour of firefly’s swarm. Besides, the proposed constrained objective function is derived from the current-voltage curve. Using the experimental current and voltage of commercial RTC France Company mono-crystalline silicon solar cell single diode at 33°C and 1000W/m² to predict the unknown parameters. The statistical errors are calculated to verify the accuracy of the results. The obtained results are compared with experimental data and other reported meta-heuristic optimization algorithms. In the end, the theoretical results confirm the validity and reliability of firefly algorithm in estimation the optimal parameters of the solar cell.

  2. Determination of Scaled Wind Turbine Rotor Characteristics from Three Dimensional RANS Calculations

    International Nuclear Information System (INIS)

    Burmester, S; Gueydon, S; Make, M

    2016-01-01

    Previous studies have shown the importance of 3D effects when calculating the performance characteristics of a scaled down turbine rotor [1-4]. In this paper the results of 3D RANS (Reynolds-Averaged Navier-Stokes) computations by Make and Vaz [1] are taken to calculate 2D lift and drag coefficients. These coefficients are assigned to FAST (Blade Element Momentum Theory (BEMT) tool from NREL) as input parameters. Then, the rotor characteristics (power and thrust coefficients) are calculated using BEMT. This coupling of RANS and BEMT was previously applied by other parties and is termed here the RANS-BEMT coupled approach. Here the approach is compared to measurements carried out in a wave basin at MARIN applying Froude scaled wind, and the direct 3D RANS computation. The data of both a model and full scale wind turbine are used for the validation and verification. The flow around a turbine blade at full scale has a more 2D character than the flow properties around a turbine blade at model scale (Make and Vaz [1]). Since BEMT assumes 2D flow behaviour, the results of the RANS-BEMT coupled approach agree better with the results of the CFD (Computational Fluid Dynamics) simulation at full- than at model-scale. (paper)

  3. Hydrodynamic characteristics of knotted and knotless purse seine netting panels as determined in a flume tank.

    Science.gov (United States)

    Tang, Hao; Xu, Liuxiong; Hu, Fuxiang

    2018-01-01

    Nylon (PA) netting is widely used in purse seines and other fishing gears due to its high strength and good sinking performance. However, hydrodynamic properties of nylon netting of different characteristics are poorly understood. This study investigated hydrodynamic characteristics of nylon netting of different knot types and solidity ratios under different attack angles and flow velocities. It was found that the hydrodynamic coefficient of netting panels was related to Reynolds number, solidity ratio, attack angle, knot type and twine construction. The solidity ratio was found to positively correlate with drag coefficient when the netting was normal to the flow (CD90), but not the case when the netting was parallel to the flow (CD0). For netting panels inclined to the flow, the inclined drag coefficient had a negative relationship with the solidity ratio for attack angles between 0° and 50°, but a positive relationship for attack angles between 50° and 90°. The lift coefficient increased with the attack angle, reaching the culminating point at an attack angle of 50°, before subsequent decline. We found that the drag generated by knot accounted for 15-25% of total drag, and the knotted netting with higher solidity ratio exhibited a greater CD0, but it was not the case for the knotless netting. Compared to knotless polyethylene (PE) netting, the drag coefficients of knotless PA netting were dominant at higher Reynolds number (Re>2200).

  4. Hydrodynamic characteristics of knotted and knotless purse seine netting panels as determined in a flume tank.

    Directory of Open Access Journals (Sweden)

    Hao Tang

    Full Text Available Nylon (PA netting is widely used in purse seines and other fishing gears due to its high strength and good sinking performance. However, hydrodynamic properties of nylon netting of different characteristics are poorly understood. This study investigated hydrodynamic characteristics of nylon netting of different knot types and solidity ratios under different attack angles and flow velocities. It was found that the hydrodynamic coefficient of netting panels was related to Reynolds number, solidity ratio, attack angle, knot type and twine construction. The solidity ratio was found to positively correlate with drag coefficient when the netting was normal to the flow (CD90, but not the case when the netting was parallel to the flow (CD0. For netting panels inclined to the flow, the inclined drag coefficient had a negative relationship with the solidity ratio for attack angles between 0° and 50°, but a positive relationship for attack angles between 50° and 90°. The lift coefficient increased with the attack angle, reaching the culminating point at an attack angle of 50°, before subsequent decline. We found that the drag generated by knot accounted for 15-25% of total drag, and the knotted netting with higher solidity ratio exhibited a greater CD0, but it was not the case for the knotless netting. Compared to knotless polyethylene (PE netting, the drag coefficients of knotless PA netting were dominant at higher Reynolds number (Re>2200.

  5. Ferrocyanide safety program: Heat load and thermal characteristics determination for selected tanks

    International Nuclear Information System (INIS)

    McLaren, J.M.; Cash, R.J.

    1993-11-01

    An analysis was conducted to determine the heat loads, conductivities, and heat distributions of waste tanks 241-BY-105, -106, -108, -110, -111, and 241-C-109 at the Hanford Site. The heat distribution of tank 241-BY-111 was determined to be homogeneously distributed throughout the sludge contained in the tank. All of the other tanks, with the exception of 241-C-109, showed evidence of a heat-producing layer at the bottom of the tanks. No evidence of a heat-producing layer in a position above the bottom was found. The thermal conductivities were determined to be within the ranges found by previous laboratory and computer analysis. The heat loads of the tanks were found to be below 2.81 kW (9,600 Btu/hr)

  6. Cine-MR imaging in determining the flow characteristics of CSF and blood in spinal and intracranial lesions

    International Nuclear Information System (INIS)

    Post, M.J.D.; Quencer, R.M.; Green, B.A.; Hinks, R.S.; Sklar, E.M.L.; Patchen, S.J.

    1988-01-01

    The purpose of this prospective study was to determine the value of cine magnetic resonance (MR) imaging in assessing the flow patterns of patients with vascular cord neoplasms, spinal cord and subarachnoid cysts, obstructive hydrocephalus, and intracranial aneurysms. The authors' results in 26 patients showed that cine MR imaging can be used to (1) identify spinal neoplasms with prominent vascular supply; (2) help distinguish spinal cord cysts occurring above a spinal cord tumor from tumoral cysts; (3) determine which spinal cord or subarachnois cysts need shunting and, postoperatively, which cysts are adequately decompressed; (4) establish which tonsillar herniations in Chiari malformations may require resection; (5) determine the site of the block in obstructive hydrocephalus; and (6) determine the flow characteristics of an aneurysm

  7. Determination of Japanese buyer valuation of metallurgical coal characteristics by hedonic modeling

    Energy Technology Data Exchange (ETDEWEB)

    Koerner, R.J. [Griffith University, Brisbane, Qld. (Australia). Graduate School of Management

    2001-09-01

    Considerable efforts have been devoted by econometric researchers to understanding Japanese steel mill (JSM) metallurgical coal valuation policies, and whether such policies disadvantage coal exporters. Much of this research has employed the hedonic regression modeling technique of Rosen and examines the significance of coal quality in establishing market price. This article discusses shortcomings in some such modeling studies, and presents results of additional hedonic modeling to buttress findings of previous work suggesting that cross-cultural bargaining factors rather than coal quality explain lower prices for Australian coals in Japanese market settlements. Policy changes that might be effective in ameliorating bilateral market distortions arising from oligopsony characteristics exhibited in JSM contract settlements are then explored. 29 refs., 2 figs., 2 tabs.

  8. On the determination of boiling water reactor characteristics by noise analysis

    International Nuclear Information System (INIS)

    Kleiss, J.

    1983-01-01

    In boiling water reactors the main noise source is the boiling process in the core and the most important variable is the neutron flux, thus the effect of the steam bubbles on the neutron flux is studied in detail. An experiment has been performed in a small subcritical reactor to measure the response of a neutron detector to the passage of a single air bubble. A mathematical model for the description of the response was tested and the results agree very well with the experiment. Noise measurements in the Dodewaard boiling water reactor are discussed. The construction of a twin self-powered neutron detector, developed to perform steam velocity measurements in the core is described. The low-frequency part of the neutron noise characteristics is considered. The transfer functions exhibit a good agreement with ones obtained by independent means: control rod step experiments and model calculations. (Auth.)

  9. Determination of groundwater characteristics and water budget in the Edremit Plain by means of isotopes

    International Nuclear Information System (INIS)

    Onhon, E.

    1983-08-01

    Detailed field investigations with environmental isotopes (O-18, D, T, C-14 and C-13) have been conducted to study the replenishment process and flow dynamics of groundwater system in Edremit plain, which is an area of 200 m 2 size located in the eastern part of Turkey. Along with conventional hydrogeological and hydrochemical data collected from the study area, results of environmental isotopic analyses performed on water samples systematically collected from the area, enabled to delineate the source and origin of recharge to the shallow groundwater aquifers and as well provided information on various dynamic parameters of groundwater flow. In addition to basic flow dynamic characteristics of the shallow aquifer in the study area, environmental isotopes were used to investigate the hydraulic interconnections between deeper thermal groundwater system and the upper shallow aquifers. Results of all the environmental isotopic analyses and their interpretation are given

  10. Determination of performance characteristics of robotic manipulator's permanent magnet synchronous motor by learning its FEM model

    International Nuclear Information System (INIS)

    Bharadvaj, Bimmi; Saini, Surendra Singh; Swaroop, Teja Tumapala; Sarkar, Ushnish; Ray, Debashish Datta

    2016-01-01

    Permanent Magnet Synchronous Motors (PMSM) are widely used as actuators because of high torque density, high efficiency and reliability. Robotic Manipulator designed for specific task generally requires actuators with very high intermittent torque and speed for their operation in limited space. Hence accurate performance characteristics of PMSM must be known beforehand under these conditions as it may damage the motor. Therefore an advanced mathematical model of PMSM is required for its control synthesis and performance analysis over wide operating range. The existing mathematical models are developed considering ideal motor without including the geometrical deviations that occur during manufacturing process of the motor or its components. These manufacturing tolerance affect torque ripple, operating current range etc. thereby affecting motor performance. In this work, the magnetically non-linear dynamic model is further exploited to refine the FE model using a proposed algorithm to iteratively compensate for the experimentally observed deviations due to manufacturing. (author)

  11. Determination of the calibration characteristic of cylindrical hot-film probes in water

    International Nuclear Information System (INIS)

    Ulmanu, D.; Weinberg, D.

    1976-01-01

    On measurement with hot-film probes in industrial water circuits one has to account for temperature fluctuations of the water during the duration of the experiment. In contrast with measurements in air the material data of water already change, and among them especially viscosity, at very small temperature variations. This occurs for water most markedly at room temperature, i.e. in the normal range for water. In the range from 20 0 C to 40 0 C the kinematical viscosity for water varies by a factor of four as compared with air. Variations of 1 0 C in water temperature in this range means an error of 1.0 per cent in velocity. For measurements in water it therefore is necessary to know the calibration characteristic of the probes. (orig./TK) [de

  12. Comorbidities and Psychosocial Characteristics as Determinants of Dropout in Outpatient Cardiac Rehabilitation.

    Science.gov (United States)

    Pardaens, Sofie; De Smedt, Delphine; De Bacquer, Dirk; Willems, Anne-Marie; Verstreken, Sofie; De Sutter, Johan

    Despite the clear benefits of cardiac rehabilitation (CR), a considerable number of patients drop out early. Therefore, we wanted to evaluate dropout in CR with a special focus on comorbidities and psychosocial background. Patients who attended CR after acute coronary syndrome, cardiac surgery, or heart failure (N = 489) were prospectively included. Dropout was defined as attending 50% of the training sessions or less (n = 96 [20%]). Demographic and clinical characteristics, exercise parameters, and psychosocial factors were analyzed according to dropout, and those with a trend toward a significant difference (P dropout, and a comparable trend was seen for the presence of chronic obstructive pulmonary disease (2.55 [0.99-6.54]). Attending the training program only twice per week also implicated a higher risk of an early withdrawal (3.76 [2.23-6.35]). In contrast, patients on β-blockers were less likely to withdraw prematurely (0.47 [0.22-0.98]). Singles were more likely to drop out (2.89 [1.56-5.35]), as well as those patients who were dependent on others to get to CR (2.01 [1.16-3.47]). Finally, the reporting of severe problems on the anxiety/depression subscale of the EuroQOL-5D questionnaire involved a higher odds for dropout (7.17 [1.46-35.29]). Neither demographic characteristics nor clinical status or exercise capacity could independently identify patients who were at risk of dropout. The presence of comorbidities and a vulnerable psychosocial background rather seem to play a key role in dropout.

  13. Determination of the vibration characteristics of nuclear fuel rods in a fluid flow using multiphysics computation

    International Nuclear Information System (INIS)

    Sbragio, Ricardo

    1999-01-01

    The determination of natural frequencies and displacement Power Spectrum Density (PSD) of fuel rods in a fluid using Computational Fluid Dynamics and Finite Element Methods is presented. The rods are modeled as slender beams subjected to small displacements in a fluid using three-dimensional mesh. The incompressible Navier-Stokes and linear momentum balance equations are solved simultaneously using Spectrum code. Two examples from literature are analyzed. The first consists in one rod in a fluid. The excitation is an impulse force at the rod central node. The second example is a two rod system in a fluid. In this case, the excitation force is random and is determined from a PSD. (author)

  14. Indirect Determination of Chemical Composition and Fuel Characteristics of Solid Waste

    DEFF Research Database (Denmark)

    Riber, Christian; Christensen, Thomas Højlund

    Determination of chemical composition of solid waste can be performed directly or indirectly by analysis of combustion products. The indirect methodology instrumented by a full scale incinerator is the only method that can conclude on elements in trace concentrations. These elements are of great...... interest in evaluating waste management options by for example LCA modeling. A methodology description of indirect determination of chemical composition and fuel properties of waste is provided and validated by examples. Indirect analysis of different waste types shows that the chemical composition...... is significantly dependent on waste type. And the analysis concludes that the transfer of substances in the incinerator is a function of waste chemical content, incinerator technology and waste physical properties. The importance of correct representation of rare items in the waste with high concentrations...

  15. Study of performance characteristics of a radiochemical method to determine uranium in biological samples

    International Nuclear Information System (INIS)

    Puga, Maria J.; Cerchietti, Maria L.R.; Prudenzo, J.E.; Arguelles, Maria G.

    2005-01-01

    In this paper is described a methodology to calculate detection limit (Ld), quantification level (Lq) and minimum detectable activity (MDA) in a radiochemical method for determination of uranium in urine samples. The concentration is measured by fluorimetry and alpha gross activity using liquid scintillation counting (LSC). The calculation of total propagated uncertainty on a spike sample is presented. Furthermore, the major sources of uncertainty and percentage contribution in both measurements are assessed. (author)

  16. Methods and Principles of Determining the Footwear and Floor Tribological Characteristics

    OpenAIRE

    D. Stamenković; M. Banić; M. Nikolić; M. Mijajlović; M. Milošević

    2017-01-01

    There are many standards relating to the anti-slip properties of footwear and flooring. These standards describe the different test methods and procedures for determining the footwear and floor slip resistance in different conditions. In this paper authors systematize the standards in this field applied in the EU and in Serbia and cite the Serbian institutes which are certified for this type of testing. In addition, the authors have carried out an analysis and comparison of the tests that are...

  17. Determination of dosimetric characteristics of OptiSeedTM a plastic brachytherapy 103Pd source

    International Nuclear Information System (INIS)

    Wang Zhonglu; Hertel, Nolan E.

    2005-01-01

    A new 103 Pd plastic brachytherapy source, OptiSeed TM Model 1032P, is being introduced by International Brachytherapy sa (IBt). Measurements of the dose distributions about the source were performed using LiF thermoluminescent dosimeters (TLD-100) in Virtual Water TM . MCNP5 calculations were performed to determine the dose distributions in Virtual Water TM and liquid water. The source dose rate constant, radial dose function, anisotropy function and anisotropy factor have been determined following the updated AAPM TG-43 recommendations. The measured dose rate constant in the Virtual Water TM phantom was determined to be 0.727±6.9% cGy h -1 U -1 , and the computed value is 0.716±2.1% cGy h -1 U -1 . The Monte-Carlo simulation yielded a dose rate constant of 0.665±2.1% cGy h -1 U -1 in water. The measured dose rate constant in water is 0.675±7.5% cGy h -1 U -1 . It is determined by multiplying the dose rate constant measured in the Virtual Water TM phantom with the ratio of the value calculated in water to that in Virtual Water TM . The average of the measured and calculated dose rate constant is 0.670±5.5% cGy h -1 U -1 . The radial dose functions of the new source were measured for distances ranging from 1 to 7 cm in a Virtual Water TM phantom. The anisotropy functions in Virtual Water TM phantom were measured for distances of 2, 3, 5, and 7 cm. The Monte-Carlo computed radial dose functions, anisotropy functions, and anisotropy factors in both Virtual Water TM phantom and water are reported

  18. Methods and Principles of Determining the Footwear and Floor Tribological Characteristics

    Directory of Open Access Journals (Sweden)

    D. Stamenković

    2017-09-01

    Full Text Available There are many standards relating to the anti-slip properties of footwear and flooring. These standards describe the different test methods and procedures for determining the footwear and floor slip resistance in different conditions. In this paper authors systematize the standards in this field applied in the EU and in Serbia and cite the Serbian institutes which are certified for this type of testing. In addition, the authors have carried out an analysis and comparison of the tests that are defined in these standards, indicating their advantages and disadvantages. Importance of the static and kinetic friction testing in determining the anti-slip properties of footwear and flooring is specifically indicated. Considering the current standards in area of slip resistance of the footwear and floor covering authors have determined the testing conditions for laboratory measuring the friction forces of different floor and footwear materials. The laboratory measurement has carried out at Faculty of Mechanical Engineering in Niš. The measuring results and their analysis are presented in the paper, as well.

  19. Bilateral comparison for determining the dynamic characteristic values of contact thermometers in fluids

    Directory of Open Access Journals (Sweden)

    S. Augustin

    2018-05-01

    Full Text Available In applicable standards and sets of rules (VDI/VDE, 2014; DIN, 2010, 2017, recommendations are made concerning the types of experiments for determining the dynamic parameters in fluids (flowing water and flowing air under well-defined conditions. In the data sheets of the thermometer manufacturers, quite different specifications can be found, such as time percentage values or time constants. Only a few thermometer manufacturers specify the medium and flow conditions under which these parameters have been determined. Above all, it is not common practice to indicate a measurement uncertainty for the dynamic parameters found. In Augustin et al. (2017, a first model for the indication of the measurement uncertainty of dynamic parameters in flowing air was presented.The present paper describes the results of a bilateral comparison made for the first time for determining dynamic parameters in the laboratories of the JUMO GmbH & Co. KG Fulda company and at the Institute of Process Measurement and Sensor Technology of the TU Ilmenau. In doing so, two type-N thermocouples with different diameters were investigated in experimental facilities with flowing water and flowing air. Subsequently, the dynamic parameters found were compared with each other. The differences revealed mainly resulted from plant-specific parameters.

  20. Determination of elastic mechanical characteristics of surface coatings from analysis of signals obtained by impulse excitation

    Science.gov (United States)

    Nyaguly, E.; Craştiu, I.; Deac, S.; Gozman-Pop, C.; Drăgănescu, G.; Bereteu, L.

    2018-01-01

    Most of the surface coatings are based on the synthetic polymers, which are substances composed from very large molecules that form tough, flexible, adhesive films when applied to surfaces. The other components of surface coverings materials are pigments that provide colour, opacity, gloss and other properties. Surface coatings are two-phase composite materials: constitute a polymer matrix on the one side, and on the other side of the pigments and additives dispersed in the matrix. Their role is not only aesthetically but also to ensure anticorrosive protection or even improve some mechanical properties of coated surfaces. In this paper it will follow, starting from the mechanical properties of the substrate, the metallic sheet in general, to determine the new properties of the assembly of substrate and the two coating layers, also the determination of mechanical properties of the layers. From the analysis of vibroacoustic signals obtained by the impulse excitation of the sample, one can determine the elasticity modulus. These results come to validate the results based on finite element analysis (FEA) of the same samples.

  1. Determining Characteristic Vegetation Areas by Terrestrial Laser Scanning for Floodplain Flow Modeling

    Directory of Open Access Journals (Sweden)

    Johanna Jalonen

    2015-01-01

    Full Text Available Detailed modeling of floodplain flows and associated processes requires data on mixed, heterogeneous vegetation at river reach scale, though the collection of vegetation data is typically limited in resolution or lack spatial information. This study investigates physically-based characterization of mixed floodplain vegetation by means of terrestrial laser scanning (TLS. The work aimed at developing an approach for deriving the characteristic reference areas of herbaceous and foliated woody vegetation, and estimating the vertical distribution of woody vegetation. Detailed experimental data on vegetation properties were gathered both in a floodplain site for herbaceous vegetation, and under laboratory conditions for 2–3 m tall trees. The total plant area (Atot of woody vegetation correlated linearly with the TLS-based voxel count, whereas the Atot of herbaceous vegetation showed a linear correlation with TLS-based vegetation mean height. For woody vegetation, 1 cm voxel size was found suitable for estimating both the Atot and its vertical distribution. A new concept was proposed for deriving Atot for larger areas from the point cloud attributes of small sub-areas. The results indicated that the relationships between the TLS attributes and Atot of the sub-areas can be derived either by mm resolution TLS or by manual vegetation sampling.

  2. Migration and determinants of health: clinical epidemiological characteristics of migrants in Malta (2010-11).

    Science.gov (United States)

    Padovese, Valeska; Egidi, Ada Maristella; Melillo Fenech, Tanya; Podda Connor, Marika; Didero, Daniele; Costanzo, Gianfranco; Mirisola, Concetta

    2014-09-01

    Over recent years Malta has experienced a growing influx of migrants from Africa. With the aim of defining demographic characteristics and assessing the prevalence of conditions of public health significance among asylum seekers in Malta, a clinical research study was implemented in the framework of the European Union project 'Mare nostrum'. From August 2010 to June 2011 a dermatologist and an infectious diseases specialist performed general and specialist health assessment of migrants hosted in open centres. Migrants included in the study were 2216, 82.7% were males, their mean age was 25 years and 70.1% were from Somalia. Out of the total females, 42.5% had undergone some type of Female Genital Mutilation/Cutting. A total of 5077 diagnoses were set, most common were skin diseases (21.9%), respiratory diseases (19.8%) and gastro-enteric diseases (14.2%), whereas 31% of migrants reported good health conditions. Immigrants have a lower morbidity burden compared with their fellow countrymen living in the origin country. However, living conditions during the journey, in transit countries and after arrival can influence their health status. The present study provides a comprehensive picture of this growing population that is in need for health promotion, mental health services and fair policy planning. © The Author 2013. Published by Oxford University Press on behalf of Faculty of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  3. Physical Education-in-CLIL tasks. Determining tasks characteristics through the analysis of the diaries

    Directory of Open Access Journals (Sweden)

    Josep Coral Mateu

    2013-07-01

    Full Text Available This article focuses on the characteristics of Physical Education-in-CLIL (PE-in-CLIL tasks. CLIL (Content and Language Integrated Learning is a teaching approach which uses foreign language as a tool to enhance the subject learning process. We connect PE-in-CLIL with key competences and we introduce the CLIL 4Cs framework. We establish the aims of the study, that is; to describe the features of tasks which are most suitable to PE-in-CLIL and identify integrated tasks which appeal most to learners. We use Action-Research and we collect data through diaries. The participants of the study were twenty-six learners of 5th grade of primary school. We described the strategies of rigour and quality applied and we analysed data using a qualitative data analysis software programme (NVivo. In the results, we identify both the tasks that appeal to students and the tasks that are developed successfully. In the conclusions, we provide teaching guidelines to plan successful PE-in-CLIL tasks that appeal to students. At this point, we emphasise tasks that combined both cooperative learning and oracy with motor activity and games. We also declare the necessity of incorporating scaffolding strategies in order to accommodate students’ linguistic needs and facilitate tasks development. Future CLIL research possibilities emerge in the Physical Education field of work.

  4. Inhomogeneous Oxygen Vacancy Distribution in Semiconductor Gas Sensors: Formation, Migration and Determination on Gas Sensing Characteristics

    Directory of Open Access Journals (Sweden)

    Jianqiao Liu

    2017-08-01

    Full Text Available The density of oxygen vacancies in semiconductor gas sensors was often assumed to be identical throughout the grain in the numerical discussion of the gas-sensing mechanism of the devices. In contrast, the actual devices had grains with inhomogeneous distribution of oxygen vacancy under non-ideal conditions. This conflict between reality and discussion drove us to study the formation and migration of the oxygen defects in semiconductor grains. A model of the gradient-distributed oxygen vacancy was proposed based on the effects of cooling rate and re-annealing on semiconductive thin films. The model established the diffusion equations of oxygen vacancy according to the defect kinetics of diffusion and exclusion. We described that the steady-state and transient-state oxygen vacancy distributions, which were used to calculate the gas-sensing characteristics of the sensor resistance and response to reducing gases under two different conditions. The gradient-distributed oxygen vacancy model had the applications in simulating the sensor performances, such as the power law, the grain size effect and the effect of depletion layer width.

  5. Inhomogeneous Oxygen Vacancy Distribution in Semiconductor Gas Sensors: Formation, Migration and Determination on Gas Sensing Characteristics.

    Science.gov (United States)

    Liu, Jianqiao; Gao, Yinglin; Wu, Xu; Jin, Guohua; Zhai, Zhaoxia; Liu, Huan

    2017-08-10

    The density of oxygen vacancies in semiconductor gas sensors was often assumed to be identical throughout the grain in the numerical discussion of the gas-sensing mechanism of the devices. In contrast, the actual devices had grains with inhomogeneous distribution of oxygen vacancy under non-ideal conditions. This conflict between reality and discussion drove us to study the formation and migration of the oxygen defects in semiconductor grains. A model of the gradient-distributed oxygen vacancy was proposed based on the effects of cooling rate and re-annealing on semiconductive thin films. The model established the diffusion equations of oxygen vacancy according to the defect kinetics of diffusion and exclusion. We described that the steady-state and transient-state oxygen vacancy distributions, which were used to calculate the gas-sensing characteristics of the sensor resistance and response to reducing gases under two different conditions. The gradient-distributed oxygen vacancy model had the applications in simulating the sensor performances, such as the power law, the grain size effect and the effect of depletion layer width.

  6. Determination of Atmospheric Aerosol Characteristics from the Polarization of Scattered Radiation

    Science.gov (United States)

    Harris, F. S., Jr.; McCormick, M. P.

    1973-01-01

    Aerosols affect the polarization of radiation in scattering, hence measured polarization can be used to infer the nature of the particles. Size distribution, particle shape, real and absorption parts of the complex refractive index affect the scattering. From Lorenz-Mie calculations of the 4-Stokes parameters as a function of scattering angle for various wavelengths the following polarization parameters were plotted: total intensity, intensity of polarization in plane of observation, intensity perpendicular to the plane of observation, polarization ratio, polarization (using all 4-Stokes parameters), plane of the polarization ellipse and its ellipticity. A six-component log-Gaussian size distribution model was used to study the effects of the nature of the polarization due to variations in the size distribution and complex refractive index. Though a rigorous inversion from measurements of scattering to detailed specification of aerosol characteristics is not possible, considerable information about the nature of the aerosols can be obtained. Only single scattering from aerosols was used in this paper. Also, the background due to Rayleigh gas scattering, the reduction of effects as a result of multiple scattering and polarization effects of possible ground background (airborne platforms) were not included.

  7. A research on determination of quality characteristics of chicken burgers produced with transglutaminase supplementation

    Directory of Open Access Journals (Sweden)

    Harun URAN

    2017-10-01

    Full Text Available Abstract Transglutaminases are enzymes that catalyze the cross-linking between peptides or proteins. They play an important role in heat stability, gel-formation capability, water-holding capacity, emulsification and nutritional properties of proteins. They are preferred in the use of a variety of meat products due to the binding properties. In this study the effect of transglutaminase on the quality characteristics of chicken burgers were investigated. The enzyme was added at 5 different concentrations (0.2%, 0.4%, 0.6%, 0.8% and 1% and the other treatments applied in burger production were followed. After the product was formed, it was left in the cold for a while and then analyses were carried out. According to the results, the enzyme contribution did not cause changes in the nutritional items (ash, fat, protein of the product groups. However, there was a significant decrease in the cooking loss and a significant increase in the texture values in the groups in which the enzyme amount was increased. Although the texture of the products have been increased, the transglutaminase treatment did not effect sensory parameters of burgers compared to the control samples. Scanning Electron Microscopy (SEM images also supported to the texture values of samples with the increase of cross-linking in microstructure.

  8. Determining the ice seasons severity during 1982-2015 using the ice extents sum as a new characteristic

    Science.gov (United States)

    Rjazin, Jevgeni; Pärn, Ove

    2016-04-01

    Sea ice is a key climate factor and it restricts considerably the winter navigation in sever seasons on the Baltic Sea. So determining ice conditions severity and describing ice cover behaviour at severe seasons interests scientists, engineers and navigation managers. The present study is carried out to determine the ice seasons severity degree basing on the ice seasons 1982 to 2015. A new integrative characteristic is introduced to describe the ice season severity. It is the sum of ice extents of the ice season id est the daily ice extents of the season are summed. The commonly used procedure to determine the ice season severity degree by the maximal ice extent is in this research compared to the new characteristic values. The remote sensing data on the ice concentrations on the Baltic Sea published in the European Copernicus Programme are used to obtain the severity characteristic values. The ice extents are calculated on these ice concentration data. Both the maximal ice extent of the season and a newly introduced characteristic - the ice extents sum are used to classify the winters with respect of severity. The most severe winter of the reviewed period is 1986/87. Also the ice seasons 1981/82, 1984/85, 1985/86, 1995/96 and 2002/03 are classified as severe. Only three seasons of this list are severe by both the criteria. They are 1984/85, 1985/86 and 1986/87. We interpret this coincidence as the evidence of enough-during extensive ice cover in these three seasons. In several winters, for example 2010/11 ice cover extended enough for some time, but did not endure. At few other ice seasons as 2002/03 the Baltic Sea was ice-covered in moderate extent, but the ice cover stayed long time. At 11 winters the ice extents sum differed considerably (> 10%) from the maximal ice extent. These winters yield one third of the studied ice seasons. The maximal ice extent of the season is simple to use and enables to reconstruct the ice cover history and to predict maximal ice

  9. Targeting allergen to FcgammaRI reveals a novel T(H)2 regulatory pathway linked to thymic stromal lymphopoietin receptor.

    Science.gov (United States)

    Hulse, Kathryn E; Reefer, Amanda J; Engelhard, Victor H; Patrie, James T; Ziegler, Steven F; Chapman, Martin D; Woodfolk, Judith A

    2010-01-01

    The molecule H22-Fel d 1, which targets cat allergen to FcgammaRI on dendritic cells (DCs), has the potential to treat cat allergy because of its T-cell modulatory properties. We sought to investigate whether the T-cell response induced by H22-Fel d 1 is altered in the presence of the T(H)2-promoting cytokine thymic stromal lymphopoietin (TSLP). Studies were performed in subjects with cat allergy with and without atopic dermatitis. Monocyte-derived DCs were primed with H22-Fel d 1 in the presence or absence of TSLP, and the resulting T-cell cytokine repertoire was analyzed by flow cytometry. The capacity for H22-Fel d 1 to modulate TSLP receptor expression on DCs was examined by flow cytometry in the presence or absence of inhibitors of Fc receptor signaling molecules. Surprisingly, TSLP alone was a weak inducer of T(H)2 responses irrespective of atopic status; however, DCs coprimed with TSLP and H22-Fel d 1 selectively and synergistically amplified T(H)2 responses in highly atopic subjects. This effect was OX40 ligand independent, pointing to an unconventional TSLP-mediated pathway. Expression of TSLP receptor was upregulated on atopic DCs primed with H22-Fel d 1 through a pathway regulated by FcgammaRI-associated signaling components, including src-related tyrosine kinases and Syk, as well as the downstream molecule phosphoinositide 3-kinase. Inhibition of TSLP receptor upregulation triggered by H22-Fel d 1 blocked TSLP-mediated T(H)2 responses. Discovery of a novel T(H)2 regulatory pathway linking FcgammaRI signaling to TSLP receptor upregulation and consequent TSLP-mediated effects questions the validity of receptor-targeted allergen vaccines. Copyright 2010 American Academy of Allergy, Asthma & Immunology. Published by Mosby, Inc. All rights reserved.

  10. Determination of magnetic characteristics of nanoparticles by low-temperature calorimetry methods

    Energy Technology Data Exchange (ETDEWEB)

    Ugulava, A.; Toklikishvili, Z. [Department of Physics, I.Javakhishvili Tbilisi State University,I.Chavchavadze av. 3, 0179 Tbilisi, Georgia (United States); Chkhaidze, S., E-mail: simon.chkhaidze@tsu.ge [Department of Physics, I.Javakhishvili Tbilisi State University,I.Chavchavadze av. 3, 0179 Tbilisi, Georgia (United States); Kekutia, Sh. [V. Chavchanidze Institute of Cybernetics, at the Technical State University, S. Euli str. 5, 0186 Tbilisi, Georgia (United States)

    2017-05-15

    At low temperatures, the heat capacity of a superparamagnetic “ideal gas” determined by magnetic degrees of freedom can greatly exceed the lattice heat capacity. It is shown that in the presence of an external magnetic field, the temperature dependence of the magnetic part of the heat capacity has two maxima. The relations between the temperature at which these maxima are achieved, the magnetic moment of the nanoparticles and the magnetic anisotropy constant have been obtained. Measuring the heat capacity maxima temperatures by low-temperature calorimetry methods and using the obtained relations, we can obtain the numerical values both of the magnetic moment of nanoparticles and the magnetic anisotropy constants.

  11. Determination of commercially valuable characteristics of plant varieties for energetic use during the state examination

    Directory of Open Access Journals (Sweden)

    В. В. Баликіна

    2014-12-01

    Full Text Available The analysis of commercially valuable indices of plant varieties for energetic use was carried out and the necessity to determine energetic indices during the state scientific-and-technical examination is substantiated. In order to explain the requirements for registration of new varieties of energy crops concerning the defi nition of indices of ability for distribution, the collection of species and hybrid forms of willow was used. Factors that prove the economic and environmental advantages of energy willow cultivation for biofuel are specifi ed.

  12. Inventory of Determinants of Obesity-Related Behaviors in Adolescents: Development and Psychometric Characteristics.

    Science.gov (United States)

    Amiri, Parisa; Ghofranipour, Fazlollah; Jalali-Farahani, Sara; Ahmadi, Fazlollah; Hosseinpanah, Farhad; Hooman, Haidar Ali; Parvin, Parnian; Ghasemi, Mohammadreza

    2015-07-01

    The rising prevalence of childhood obesity is a major health problem worldwide. Hence, there is a growing need for health professionals to become capable of assessing the factors that determine lifestyle in a culturally relevant manner. This study aimed to develop and assess a questionnaire for measuring determinants of obesity-related behaviors in Tehranian adolescents. Based on the results of a qualitative study and an extensive literature review, the 44-item "Inventory of determinants of obesity-related behaviors in adolescents (IDOBA)" with eight subscales was developed: 1) unhealthy nutrition and physical inactivity; 2) stress-related eating; 3) perceived inability; 4) perceived lack of threat; 5) perceived priority of educational achievement; 6) perceived acceptability; 7) motivation loss; and 8) lack of support. Validity of IDOBA was assessed, utilizing face, content, and construct validity methods. To confirm face validity, ten overweight/obese adolescents completed the questionnaire. To calculate content validity ratio (CVR) and content validity index (CVI), a different panel of ten experts commented independently on the necessity, relevance, clarity, and simplicity of each item. To assess construct validity using exploratory factor analysis (EFA), a total of 478 adolescents (57.7% male) aged 13 to 18 years, who were recruited from schools, participated in the study. Confirmatory factor analysis (CFA) was used to test whether the data fit the hypothesized measurement model that was derived from EFA. Test-retest and internal consistency methods were used to assess reliability of the IDOBA scale. All items were perceived as relevant and comprehendible by adolescents. Content validity was confirmed by the panel of experts. The internal consistency, as measured by Cronbach's alpha coefficients, exceeded the minimum reliability standard of 0.60 for eight subscales. No ceiling effects were observed. Detected floor effects ranged from 0.2% for perceived

  13. Secular Variation and Physical Characteristics Determination of the HADS Star EH Lib

    Science.gov (United States)

    Pena, J. H.; Villarreal, C.; Pina, D. S.; Renteria, A.; Soni, A., Guillen, J. Calderon, J.

    2017-12-01

    Physical parameters of EH Lib have been determined based on observations carried out in 2015 with photometry. They have also served, along with samples from the years 1969 and 1986, to analyse the frequency content of EH Lib with Fourier Transforms. Recent CCD observations increased the times of maximum with twelve new times which helped us study the secular variation of the period with a method based on the minimization of the standard deviation of the O-C residuals. It is concluded that there may be a long-term period change.

  14. Determination and Analysis of Ar-41 Dose Rate Characteristic at Thermal Column of Kartini Reactor

    International Nuclear Information System (INIS)

    Widarto; Sardjono, Y.

    2007-01-01

    Determination and Analysis of Ar-41 activity dose rate at the thermal column after shutdown of Kartini reactor has been done. Based on evaluation and analysis concluded that external dose rate is D = 1.606x10 -6 Sv/second and internal dose rate is 3.429x10 -1 1 Sv/second. It means that if employee work at the column thermal area for 15 minutes a day, 5 days a week, in a year will be 0.376 Sv still under dose rate limit i.e. 0.5 Sv, so that the column thermal facility is safely area. (author)

  15. Analytical protocols for the determination of sulphur compounds characteristic of the metabolism of Chlorobium limicola

    Directory of Open Access Journals (Sweden)

    A. Aliboni

    2015-09-01

    Full Text Available Chlorobium limicola belongs to the green sulphur bacteria that has a potential for technological applications such as biogas clean up oxidising hydrogen sulphide to elemental sulphur through photosynthetic process. In the present work, analytical methods are described for the determination of different sulphur species in C. limicola cultures – sulphide by GC-FPD, sulphate by ionic HPLC and elemental sulphur by RP HPLC. The latter method eliminates the need for chloroform extraction of water suspensions of elemental sulphur. Data from sulphide and elemental sulphur analyses have been compared with ones coming from more traditional analytical methodologies.

  16. On experimental determination of characteristics of nuclear fusion reactions from mu-molecular resonance states

    International Nuclear Information System (INIS)

    Bystritskij, V.M.; Pen'kov, F.M.

    1997-01-01

    Charge-nonsymmetrical deuterium-helium muon complexes (dμHe) are studied. A method is proposed for experimentally determining the rates of nuclear fusion reactions in dμHe molecules in the J=1 and J=0 states (J is the orbital moment of the system) and the partial rates for radiative decay of these complexes in these states. Experiments are supposed to be carried out at meson factories with gaseous and cryogenic targets filled with a mixture of deuterium and helium

  17. Determination of thermal characteristics of combustion products of fire-tube heat generator with flow turbulator

    OpenAIRE

    Lukjanov Alexander V.; Ostapenko Dmitry V.; Basist Dmitry V.

    2014-01-01

    Boiler construction is one of the major industries of any state. The aim is to determine the effect of the turbulator on the intensity of heat transfer in the convective part of the fire-tube heat generator of domestic production. The improvement of convective heating surfaces is one of the ways to increase the energy efficiency of the fire-tube heat generator. Since model of the process of heat transfer of gas flow in the convective tubes is multifactorial and does not have clear analytical ...

  18. Thermoionic emission characteristics of uranium with application to its determination by MSID technique using 233U tracer

    International Nuclear Information System (INIS)

    Shihomatsu, H.M.; Iyer, S.S.

    1988-01-01

    Experimental details of the uranium determination in geological samples (50-1500 ppm range) by mass spectrometric isotope dilution technique (MSID) employing 233 U tracer are presented. For this purpose the thermoionic emission characteristics of uranium in various filament arrangements like simple plane, filament boat, double, are studied and the most efficient one selected for the isotope dilution analysis. The various experimental procedures involved in the MSID like sample dissolution, chemical separation and mass spectrometric analysis are developed and optimised. The experimental results on the uranium determination by MSID with 233 U tracer yielded precision and accuracy of 0,5% and 1% respectively. The importance of the sampling in the precise and accuracy determination of uranium in geological samples, where it is heterogeneously distributed, is discussed. (author) [pt

  19. Resistivity method contribution in determining of fault zone and hydro-geophysical characteristics of carbonate aquifer, eastern desert, Egypt

    Science.gov (United States)

    Ammar, A. I.; Kamal, K. A.

    2018-03-01

    Determination of fault zone and hydro-geophysical characteristics of the fractured aquifers are complicated, because their fractures are controlled by different factors. Therefore, 60 VESs were carried out as well as 17 productive wells for determining the locations of the fault zones and the characteristics of the carbonate aquifer at the eastern desert, Egypt. The general curve type of the recorded rock units was QKH. These curves were used in delineating the zones of faults according to the application of the new assumptions. The main aquifer was included at end of the K-curve type and front of the H-curve type. The subsurface layers classified into seven different geoelectric layers. The fractured shaly limestone and fractured limestone layers were the main aquifer and their resistivity changed from low to medium (11-93 Ω m). The hydro-geophysical properties of this aquifer such as the areas of very high, high, and intermediate fracture densities of high groundwater accumulations, salinity, shale content, porosity distribution, and recharging and flowing of groundwater were determined. The statistical analysis appeared that depending of aquifer resistivity on the water salinities (T.D.S.) and water resistivities add to the fracture density and shale content. The T.D.S. increasing were controlled by Na+, Cl-, Ca2+, Mg2+, and then (SO4)2-, respectively. The porosity was calculated and its average value was 19%. The hydrochemical analysis of groundwater appeared that its type was brackish and the arrangements of cation concentrations were Na+ > Ca2+ > Mg2+ > K+ and anion concentrations were Cl- > (SO4)2- > HCO3 - > CO3 -. The groundwater was characterized by sodium-bicarbonate and sodium-sulfate genetic water types and meteoric in origin. Hence, it can use the DC-resistivity method in delineating the fault zone and determining the hydro-geophysical characteristics of the fractured aquifer with taking into account the quality of measurements and interpretation.

  20. Determination and Interpretation of Characteristic Limits for Radioactivity Measurements: Decision Threshhold, Detection Limit and Limits of the Confidence Interval

    International Nuclear Information System (INIS)

    2017-01-01

    Since 2004, the environment programme of the IAEA has included activities aimed at developing a set of procedures for analytical measurements of radionuclides in food and the environment. Reliable, comparable and fit for purpose results are essential for any analytical measurement. Guidelines and national and international standards for laboratory practices to fulfil quality assurance requirements are extremely important when performing such measurements. The guidelines and standards should be comprehensive, clearly formulated and readily available to both the analyst and the customer. ISO 11929:2010 is the international standard on the determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measuring ionizing radiation. For nuclear analytical laboratories involved in the measurement of radioactivity in food and the environment, robust determination of the characteristic limits of radioanalytical techniques is essential with regard to national and international regulations on permitted levels of radioactivity. However, characteristic limits defined in ISO 11929:2010 are complex, and the correct application of the standard in laboratories requires a full understanding of various concepts. This publication provides additional information to Member States in the understanding of the terminology, definitions and concepts in ISO 11929:2010, thus facilitating its implementation in Member State laboratories.

  1. Using torque switch settings and spring pack characteristics to determine actuator output torques

    International Nuclear Information System (INIS)

    Black, B.R.

    1992-01-01

    Actuator output torque of motor operated valves is often a performance parameter of interest. It is not always possible to directly measure this torque. Torque spring pack deflection directly reflects actuator output torque and can be directly measured on most actuators. The torque spring pack may be removed from the actuator and tested to determine its unique force-deflection relationship. Or, a representative force-deflection relationship for the particular spring pack model may be available. With either relationship, measurements of torque spring pack deflection may then be correlated to corresponding forces. If the effective length of the moment arm within the actuator is known, actuator output torque can then be determined. The output torque is simply the product of the effective moment arm length and the spring pack force. This paper presents the reliability of this technique as indicated by testing. TU Electric is evaluating this technique for potential use in the future. Results presented in this paper should be considered preliminary. Applicability of these results may be limited to actuators and their components in a condition similar to those for which test data have been examined

  2. Taguchi experimental design to determine the taste quality characteristic of candied carrot

    Science.gov (United States)

    Ekawati, Y.; Hapsari, A. A.

    2018-03-01

    Robust parameter design is used to design product that is robust to noise factors so the product’s performance fits the target and delivers a better quality. In the process of designing and developing the innovative product of candied carrot, robust parameter design is carried out using Taguchi Method. The method is used to determine an optimal quality design. The optimal quality design is based on the process and the composition of product ingredients that are in accordance with consumer needs and requirements. According to the identification of consumer needs from the previous research, quality dimensions that need to be assessed are the taste and texture of the product. The quality dimension assessed in this research is limited to the taste dimension. Organoleptic testing is used for this assessment, specifically hedonic testing that makes assessment based on consumer preferences. The data processing uses mean and signal to noise ratio calculation and optimal level setting to determine the optimal process/composition of product ingredients. The optimal value is analyzed using confirmation experiments to prove that proposed product match consumer needs and requirements. The result of this research is identification of factors that affect the product taste and the optimal quality of product according to Taguchi Method.

  3. Centrifugal Pump Monitoring and Determination of Pump Characteristic Curves Using Experimental and Analytical Solutions

    Directory of Open Access Journals (Sweden)

    Marius Stan

    2018-02-01

    Full Text Available Centrifugal pumps are widely used in the industry, especially in the oil and gas sector for fluids transport. Classically, these are designed to transfer single phase fluids (e.g., water at high flow rates and relatively low pressures when compared with other pump types. As part of their constructive feature, centrifugal pumps rely on seals to prevent air entrapment into the rotor during its normal operation. Although this is a constructive feature, water should pass through the pump inlet even when the inlet manifold is damaged. Modern pumps are integrated in pumping units which consist of a drive (normally electric motor, a transmission (when needed, an electronic package (for monitoring and control, and the pump itself. The unit also has intake and outlet manifolds equipped with valves. Modern systems also include electronic components to measure and monitor pump working parameters such as pressure, temperature, etc. Equipment monitoring devices (vibration sensors, microphones are installed on modern pumping units to help users evaluate the state of the machinery and detect deviations from the normal working condition. This paper addresses the influence of air-water two-phase mixture on the characteristic curve of a centrifugal pump; pump vibration in operation at various flow rates under these conditions; the possibilities of using the results of experimental investigations in the numerical simulations for design and training purposes, and the possibility of using vibration and sound analysis to detect changes in the equipment working condition. Conclusions show that vibration analysis provides accurate information about the pump’s functional state and the pumping process. Moreover, the acoustic emission also enables the evaluation of the pump status, but needs further improvements to better capture and isolate the usable sounds from the environment.

  4. Characteristics, determinants and perspectives of experienced medical humanitarians: a qualitative approach.

    Science.gov (United States)

    Asgary, Ramin; Lawrence, Katharine

    2014-12-08

    To explore the characteristics, motivations, ideologies, experience and perspectives of experienced medical humanitarian workers. We applied a qualitative descriptive approach and conducted in-depth semistructured interviews, containing open-ended questions with directing probes, with 44 experienced international medical aid workers from a wide range of humanitarian organisations. Interviews were coded and analysed, and themes were developed. International non-governmental organisations (INGOs) and United Nations (UN). 61% of participants were female; mean age was 41.8 years with an average of 11.8 years of humanitarian work experience with diverse major INGOs. Significant core themes included: population's rights to assistance, altruism and solidarity as motives; self-identification with the mission and directives of INGOs; shared personal and professional morals fostering collegiality; accountability towards beneficiaries in areas of programme planning and funding; burnout and emotional burdens; uncertainties in job safety and security; and uneasiness over changing humanitarian principles with increasing professionalisation of aid and shrinking humanitarian access. While dissatisfied with overall aid operations, participants were generally satisfied with their work and believed that they were well-received by, and had strong relationships with, intended beneficiaries. Despite regular use of language and ideology of rights, solidarity and concepts of accountability, tension exists between the philosophy and practical incorporation of accountability into operations. To maintain a humanitarian corps and improve aid worker retention, strategies are needed regarding management of psychosocial stresses, proactively addressing militarisation and neo-humanitarianism, and nurturing individuals' and organisations' growth with emphasis on humanitarian principles and ethical practices, and a culture of internal debate, reflection and reform. Published by the BMJ Publishing

  5. 222 Rn determination and physicochemical characteristic and biological in aquifers in the Toluca Valley

    International Nuclear Information System (INIS)

    Hernandez A, A.

    1998-01-01

    Concentration levels of 222 Rn and 226 Rn have been analyzed in water samples from boreholes belonging to the drinking water supply system around Toluca, Mexico. The 222 Rn source is the decay of 226 Rn within the solid matrix of the aquifer. The study was performed during the dry and rainy seasons. 222 Rn concentration was determined by the liquid scintillation technique, 226 Rn was determined by gamma spectrometry, the physicochemical parameters and bacteriological analysis were performed by conventional chemical techniques. Solubilized trace elements were determined by Inductively Coupled Plasma - Mass Spectrometry (Icp-Ms). The radon level fluctuations at the boreholes in Toluca city and Almoloya spring indicated differences in the radon content. At borehole Lodos Prietos 2, the temperature and radon level were systematically the highest in comparison with the other boreholes and the spring indicating a contribution of a regional flow to the water of this particular borehole. The result for 226 Rn, the average 222 Rn observed during the sampling period, no correspondence occurs between the radium and the radon content indicating that, radon is not supported by radium, but is incorporated into the water through fissures in the rocks in contact with the water. The radon levels obtained in house faucets which water is supplied by boreholes decrease as a function of the distance from the source borehole to the house. With the chemical composition of each one of the studied boreholes and spring a Piper diagram was draw indicating the kind of water. The boreholes and spring can be classified as bicarbonate calcium/magnesium. Almost no fluctuation on time was observed in the chemical species and trace elements only a slight increase was observed at the end of the rain season. At Almoloya, spring pollution with coliform bacteria and nitrates showed an anthropogenic contribution to the water deterioration probable and fertilizers and detritus. Most of the studied water

  6. A non-Linear transport model for determining shale rock characteristics

    Science.gov (United States)

    Ali, Iftikhar; Malik, Nadeem

    2016-04-01

    Unconventional hydrocarbon reservoirs consist of tight porous rocks which are characterised by nano-scale size porous networks with ultra-low permeability [1,2]. Transport of gas through them is not well understood at the present time, and realistic transport models are needed in order to determine rock properties and for estimating future gas pressure distribution in the reservoirs. Here, we consider a recently developed non-linear gas transport equation [3], ∂p-+ U ∂p- = D ∂2p-, t > 0, (1) ∂t ∂x ∂x2 complimented with suitable initial and boundary conditions, in order to determine shale rock properties such as the permeability K, the porosity φ and the tortuosity, τ. In our new model, the apparent convection velocity, U = U(p,px), and the apparent diffusivity D = D(p), are both highly non-linear functions of the pressure. The model incorporate various flow regimes (slip, surface diffusion, transition, continuum) based upon the Knudsen number Kn, and also includes Forchchiemers turbulence correction terms. In application, the model parameters and associated compressibility factors are fully pressure dependent, giving the model more realism than previous models. See [4]. Rock properties are determined by solving an inverse problem, with model parameters adjustment to minimise the error between the model simulation and available data. It is has been found that the proposed model performs better than previous models. Results and details of the model will be presented at the conference. Corresponding author: namalik@kfupm.edu.sa and nadeem_malik@cantab.net References [1] Cui, X., Bustin, A.M. and Bustin, R., "Measurements of gas permeability and diffusivity of tight reservoir rocks: different approaches and their applications", Geofluids 9, 208-223 (2009). [2] Chiba R., Fomin S., Chugunov V., Niibori Y. and Hashida T., "Numerical Simulation of Non Fickian Diffusion and Advection in a Fractured Porous Aquifer", AIP Conference Proceedings 898, 75 (2007

  7. Determination of soil liquefaction characteristics by large-scale laboratory tests

    International Nuclear Information System (INIS)

    1975-05-01

    The testing program described in this report was carried out to study the liquefaction behavior of a clean, uniform, medium sand. Horizontal beds of this sand, 42 inches by 90 inches by 4 inches were prepared by pluviation with a special sand spreader, saturated, and tested in a shaking table system designed for this program, which applied a horizontal cyclic shear stress to the specimens. Specimen size was selected to reduce boundary effects as much as possible. Values of pore pressures and shear strains developed during the tests are presented for sand specimens at relative densities of 54, 68, 82, and 90 percent, and the results interpreted to determine the values of the stress ratio causing liquefaction at the various relative densities

  8. Determination techniques of characteristics of brittle fracture for materials on the CMEA 1-35 problem

    International Nuclear Information System (INIS)

    Makhutov, N.A.; Tananov, A.I.; Koshelev, P.F.; Zatsarinnyj, V.V.

    1981-01-01

    The problems concerning the development and improvement of the investigation techniques and the evaluation of the resistance to brittle fracture of a wide class of materials (the reactor ones, in particular) under different conditions of loading using modern test means are considered in the review. It is reflected in the plan of works on the theme 1-35.3 ''Development of the methods of determination of resistance to brittle fracture of the materials and elements of construct Specialists from CMEA member-countries took an active part in its implementation. The development of the 1-35.3 theme presupposes the creation of scientific bases of calculation methods of the details of machines and elements of constructions according to the criteria of resistance to brittle fracture. The results obtained when using the methods of fracture mechanics are of significant importance in the substantiation of strength and admissible defectiveness of large-size constructions operating under the extremum conditions [ru

  9. The question of determining the characteristics of steam displacement of oil

    Energy Technology Data Exchange (ETDEWEB)

    Trimilic, D; Durdevic, V; Nad, D

    1984-01-01

    The problems of optimizing steam pumping into a stratum in order to increase the oil production in operating oil deposits with high viscosity of the mineral are examined. A STEAM program is developed which is designed for determining the parameters of the oil with the effects of steam. The program is written in Fortran 4 language and is considered quite reliable in light of its acquisition through correction of Mikhill and Stegepeyer's basic model on the basis of the actual conduct of the deposits at which the steam injection method has been in practical use for some time. This ensures exceedingly high coincidence between the values calculated using the proposed model and the actual indicators of operation. Thanks to the small number of output data, the program is marked by operational simplicity and takes up a small volume of the computer (EVM) memory which noticeably reduces the cost of the calculations.

  10. Sampling and analysis plan for the 116-C-5 retention basins characteristic dangerous waste determination

    International Nuclear Information System (INIS)

    Bauer, R.G.; Dunks, K.L.

    1996-03-01

    Cooling water flow from the rear face of the 100-B and 100-C reactors was diverted to large retention basins prior to discharge to the Columbia River. These retention basins delayed the release of the reactor coolant for decay of the short-lived activation products and for thermal cooling. Some of the activation products were deposited in sludge that settled in the basins and discharge lines. In addition, some contamination was deposited in soil around the basins and associated piping. The sampling objective of this project is to determine if regulated levels of leachable lead are present in the abrasive materials used to decontaminate the retention basin tank walls, in the material between the tank base plate and the concrete foundation, and in the soils immediately surrounding the perimeter of the retention basins. Sampling details, including sampling locations, frequencies, and analytical requirements, are discussed. Also described is the quality assurance plan for this project

  11. Comparison of different methods for the determination of fractal characteristics of soot aggregates

    International Nuclear Information System (INIS)

    Ouf, F.X.; Coursil, C.; Vendel, J.; Coursil, C.; Gehin, E.

    2007-01-01

    Morphology of particles generated during hydrocarbons or biomass combustion is fundamental as data for characterizing the optical and aerodynamic behaviour of these particles. The fractal nature of soot particles is well known since the works of Jullien and Botet (1987). Nevertheless, the determination of the fractal morphology of these aggregates is based on direct analysis of transmission electronic microscopy (TEM) micrography (Koylo et al., 1995; Sorensen and Feke, 1996; Brasil et al., 2000) which represents a long and tiresome work. We propose in this work to use the method introduced by Kelly and McMurry (1992) and based on serial analysis of electrical mobility and aerodynamic diameters of soot aggregates. This method has been recently used by VanGulijk et al. (2004) and Park et al. (2004), and seems to bring morphological information systematically higher than the TEM analysis. In this study we will detail the TEM analysis method and the theoretical approach associated to the serial method of Kelly and McMurry (1992). We will also present the experimental setup used and the results obtained for aggregates generated during the combustion of acetylene (C 2 H 2 ), toluene (C 7 H 8 ) and Polymethyl Methacrylate (PMMA, C 5 H 8 O 2 ). These results will be compared to TEM analysis results, and discrepancies will be analysed and explained in detail. We will finally conclude on advantages and disadvantages of each method and also on potential of these approaches. The link will be thus established out with the determination of the effective density of the soot aggregates, which is presented in work of Ouf et al. (2005a). (authors)

  12. Combustion characteristics and optimal factors determination with Taguchi method for diesel engines port-injecting hydrogen

    International Nuclear Information System (INIS)

    Wu, Horng-Wen; Wu, Zhan-Yi

    2012-01-01

    This study applies the L 9 orthogonal array of the Taguchi method to find out the best hydrogen injection timing, hydrogen-energy-share ratio, and the percentage of exhaust gas circulation (EGR) in a single DI diesel engine. The injection timing is controlled by an electronic control unit (ECU) and the quantity of hydrogen is controlled by hydrogen flow controller. For various engine loads, the authors determine the optimal operating factors for low BSFC (brake specific fuel consumption), NO X , and smoke. Moreover, net heat-release rate involving variable specific heat ratio is computed from the experimental in-cylinder pressure. In-cylinder pressure, net heat-release rate, A/F ratios, COV (coefficient of variations) of IMEP (indicated mean effective pressure), NO X , and smoke using the optimum condition factors are compared with those by original baseline diesel engine. The predictions made using Taguchi's parameter design technique agreed with the confirmation results on 95% confidence interval. At 45% and 60% loads the optimum factor combination compared with the original baseline diesel engine reduces 14.52% for BSFC, 60.5% for NO X and for 42.28% smoke and improves combustion performance such as peak in-cylinder pressure and net heat-release rate. Adding hydrogen and EGR would not generate unstable combustion due to lower COV of IMEP. -- Highlights: ► We use hydrogen injector controlled by ECU and cooled EGR system in a diesel engine. ► Optimal factors by Taguchi method are determined for low BSFC, NO X and smoke. ► The COV of IMEP is lower than 10% so it will not cause the unstable combustion. ► We improve A/F ratio, in-cylinder pressure, and heat-release at optimized engine. ► Decrease is 14.5% for BSFC, 60.5% for NO X , and 42.28% for smoke at optimized engine.

  13. Modernisation of a test rig for determination of vehicle shock absorber characteristics by considering vehicle suspension elements and unsprung masses

    Science.gov (United States)

    Maniowski, M.; Para, S.; Knapczyk, M.

    2016-09-01

    This paper presents a modernization approach of a standard test bench for determination of damping characteristics of automotive shock absorbers. It is known that the real-life work conditions of wheel-suspension dampers are not easy to reproduce in laboratory conditions, for example considering a high frequency damper response or a noise emission. The proposed test bench consists of many elements from a real vehicle suspension. Namely, an original tyre-wheel with additional unsprung mass, a suspension spring, an elastic top mount, damper bushings and a simplified wheel guiding mechanism. Each component was tested separately in order to identify its mechanical characteristics. The measured data serve as input parameters for a numerical simulation of the test bench behaviour by using a vibratory model with 3 degrees of freedom. Study on the simulation results and the measurements are needed for further development of the proposed test bench.

  14. A Comparative Study of Dispersion Characteristics Determination of a Trapezoidally Corrugated Slow Wave Structure Using Different Techniques

    International Nuclear Information System (INIS)

    Saber, Md. Ghulam; Sagor, Rakibul Hasan; Amin, Md. Ruhul

    2016-01-01

    The linear dispersion relation of a trapezoidally corrugated slow wave structure (TCSWS) is analyzed and presented. The size parameters of the TCSWS are chosen in such a way that they operate in the x-band frequency range. The dispersion relation is solved by utilizing the Rayleigh–Fourier method by expressing the radial function in terms of the Fourier series. A highly accurate synthetic technique is also applied to determine the complete dispersion characteristics from experimentally measured resonances (cold test). Periodic structures resonate at specific frequencies when the terminals are shorted appropriately. The dispersion characteristics obtained from numerical calculation, synthetic technique and cold test are compared, and an excellent agreement is achieved. (paper)

  15. Absorbing Markov Chain Models to Determine Optimum Process Target Levels in Production Systems with Dual Correlated Quality Characteristics

    Directory of Open Access Journals (Sweden)

    Mohammad Saber Fallah Nezhad

    2012-03-01

    Full Text Available For a manufacturing organization to compete effectively in the global marketplace, cutting costs and improving overall efficiency is essential.  A single-stage production system with two independent quality characteristics and different costs associated with each quality characteristic that falls below a lower specification limit (scrap or above an upper specification limit (rework is presented in this paper. The amount of reworks and scraps are assumed to be depending on the process parameters such as process mean and standard deviation thus the expected total profit is significantly dependent on the process parameters. This paper develops a Markovian decision making model for determining the process means. Sensitivity analyzes is performed to validate, and a numerical example is given to illustrate the proposed model. The results showed that the optimal process means extremely effects on the quality characteristics’ parameters.

  16. Determination of genotypic and clinical characteristics of Colombian patients with mucopolysaccharidosis IVA

    Directory of Open Access Journals (Sweden)

    Tapiero-Rodriguez SM

    2018-04-01

    Full Text Available Sandra M Tapiero-Rodriguez,1 Johanna C Acosta Guio,1 Gloria Liliana Porras-Hurtado,2 Natalia García,3 Martha Solano,4 Harry Pachajoa,5 Harvy M Velasco1 1Universidad Nacional de Colombia, Departamento de morfología, Maestría de genética humana, Bogotá, 2Family Compensation Fund of Risaralda, Pereira, 3Faculty of Medicine, Manizales University, Manizales, 4Department of Neuropediatrics, Cardioinfantil Foundation, Bogotá, 5Centro de Investigaciones en Anomalías Congénitas y Enfermedades Raras, Universidad ICESI y Fundación Valle del Lili, Cali, Colombia Background: As mucopolysaccharidosis IVA (MPS IVA is the most frequent MPS in Colombia, this paper aims to describe its clinical and mutational characteristics in 32 diagnosed patients included in this study. Methods: Genotyping was completed by amplification and Sanger sequencing of the GALNS gene. The SWISS-model platform was used for bioinformatic analysis, and mutant proteins were generated by homology from the wild-type GALNS code 4FDI template from the Protein Data Bank (PDB database. Docking was performed using the GalNAc6S ligand (PubChem CID: 193456 by AutoDock Vina 1.0 and visualized in PyMOL and LigPlot+. Results: Eleven variants were identified, and one new pathogenic variant was described in the heterozygous state, which is consistent with genotype c. 319 G>T or p.Ala107Ser. The pathogenic variant c.901G>T or p.Gly301Cys was the most frequent mutation with 51.6% of alleles. Docking revealed affinity energy of −5.9 Kcal/mol between wild-type GALNS and the G6S ligand. Some changes were evidenced at the intermolecular interaction level, and affinity energy for each mutant decreased. Conclusion: Clinical variables and genotypic analysis were similar to those reported for other world populations. Genotypic data showed greater allelic heterogeneity than those previously reported. Bioinformatics tools showed differences in the binding interactions of mutant proteins with the G6S

  17. Using Naïve Bayesian Analysis to Determine Imaging Characteristics of KRAS Mutations in Metastatic Colon Cancer.

    Science.gov (United States)

    Pershad, Yash; Govindan, Siddharth; Hara, Amy K; Borad, Mitesh J; Bekaii-Saab, Tanios; Wallace, Alex; Albadawi, Hassan; Oklu, Rahmi

    2017-09-02

    Genotype, particularly Ras status, greatly affects prognosis and treatment of liver metastasis in colon cancer patients. This pilot aimed to apply word frequency analysis and a naive Bayes classifier on radiology reports to extract distinguishing imaging descriptors of wild-type colon cancer patients and those with v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS) mutations. In this institutional-review-board-approved study, we compiled a SNaPshot mutation analysis dataset from 457 colon adenocarcinoma patients. From this cohort of patients, we analyzed radiology reports of 299 patients (> 32,000 reports) who either were wild-type (147 patients) or had a KRAS (152 patients) mutation. Our algorithm determined word frequency within the wild-type and mutant radiology reports and used a naive Bayes classifier to determine the probability of a given word belonging to either group. The classifier determined that words with a greater than 50% chance of being in the KRAS mutation group and which had the highest absolute probability difference compared to the wild-type group included: "several", "innumerable", "confluent", and "numerous" ( p colon adenocarcinoma. Moreover, likely characteristic imaging traits of mutant tumors make probabilistic word analysis useful in identifying unique characteristics and disease course, with applications ranging from radiology and pathology reports to clinical notes.

  18. Determination of the spatial characteristics of an RF electrodeless discharge by the method of emission tomography

    International Nuclear Information System (INIS)

    Denisova, N. V.; Revalde, G.; Skudra, A.

    2006-01-01

    The spatial distribution of the density of mercury atoms in the 7 3 S state in a spherical RF electrode-less gas-discharge lamp is reconstructed by the method of emission tomography. The local values of the corresponding emission coefficients, which are proportional to the density of mercury atoms in the 7 3 S state, are determined from integral (over the plasma volume) measurements of the lamp radiation at a wavelength of 546.1 nm with the help of an algorithm based on the maximum entropy method. The results obtained show that, for all of the operating modes under study, the profile of the density of mercury atoms in the 7 3 S state has a minimum in the center of the lamp and a maximum near its wall. At a generator current of 100 mA and cold-spot temperature of 41 deg. C, the density of mercury atoms in the 7 3 S state is observed to drop substantially both in the center of the lamp and near its wall, the density in the center being reduced to almost zero. An explanation of this phenomenon is proposed

  19. Role of curvatures in determining the characteristics of a string vibrating against a doubly curved obstacle

    Science.gov (United States)

    Singh, Harkirat; Wahi, Pankaj

    2017-08-01

    The motion of a string in the presence of a doubly curved obstacle is investigated. A mathematical model has been developed for a general shape of the obstacle. However, detailed analysis has been performed for a shape relevant to the Indian stringed musical instruments like Tanpura and Sitar. In particular, we explore the effect of obstacle's curvature in the plane perpendicular to the string axis on its motion. This geometrical feature of the obstacle introduces a coupling between motions in mutually perpendicular directions over and above the coupling due to the stretching nonlinearity. We find that only one planar motion is possible for our system. Small amplitude planar motions are stable to perturbations in the perpendicular direction resulting in non-whirling motions while large amplitude oscillations lead to whirling motions. The critical amplitude of oscillations, across which there is a transition in the qualitative behavior of the non-planar trajectories, is determined using Floquet theory. Our analysis reveals that a small obstacle curvature in a direction perpendicular to the string axis leads to a considerable reduction in the critical amplitudes required for initiation of whirling motions. Hence, this obstacle curvature has a destabilizing effect on the planar motions in contrast to the curvature along the string axis which stabilizes planar motions.

  20. Personal characteristics and contextual factors that determine "helping," "joining in," and "doing nothing" when witnessing cyberbullying.

    Science.gov (United States)

    Van Cleemput, Katrien; Vandebosch, Heidi; Pabian, Sara

    2014-01-01

    In this article, we investigated several determinants of bystanders' reactive behaviors when confronted with cyberbullying using self-reported data from 2,333 Flemish 9-16 year olds. Structural equation modeling showed that adolescents that had joined in on the cyberbullying were older, had lower levels of empathy and were more likely to have been involved in cyberbullying or traditional bullying as perpetrators. Adolescents who had helped the victim were younger, had higher levels of empathy and were more likely to have been a victim of cyberbullying or traditional bullying in the past months. Adolescents that did nothing when they witnessed cyberbullying, were also older, showed lower levels of empathy and were less likely to have been a victim of traditional bullying. Social anxiety was not related to joining in, helping and remaining passive. In the second part of the analysis, we found that bystanders' passive behavior could be explained in more detail by moral disengagement theory and other contextual factors. In the discussion, the implications of the findings for research on cyberbullying are addressed. © 2014 Wiley Periodicals, Inc.

  1. Determinants and Characteristics of Korean Companies’ Carbon Management under the Carbon Pricing Scheme

    Directory of Open Access Journals (Sweden)

    Sunhee Suk

    2018-04-01

    Full Text Available In response to the domestic emission trading scheme, Korean companies are required to shift their strategies from voluntary or regulation-driven management approaches to innovative carbon management utilizing their carbon option linked with economic value. Using a questionnaire survey targeting companies subjected to the emission trading scheme, this study explores the status of Korean companies’ carbon management in a series of five strategies and identifies the correlation between companies’ proactive carbon strategies and pre-listed determinant factors. This study found that Korean companies’ practices in accordance with carbon pricing deviate little from conventional energy and environmental management in this phase. They are likely to be affected by the need to appear socially responsible or to make a social contribution, without having to exceed this mandate in terms activities outside of this remit. Yet, only a small proportion of companies have advanced to the stage of proactive carbon management. For them, top managers’ support and understanding are essential factors together with government pressure to factor-in issues related to carbon with their business strategies. This study provides implications for policy and corporate in promoting carbon-oriented management under the carbon policy.

  2. Determination of thermal characteristics of combustion products of fire-tube heat generator with flow turbulator

    Directory of Open Access Journals (Sweden)

    Lukjanov Alexander V.

    2014-12-01

    Full Text Available Boiler construction is one of the major industries of any state. The aim is to determine the effect of the turbulator on the intensity of heat transfer in the convective part of the fire-tube heat generator of domestic production. The improvement of convective heating surfaces is one of the ways to increase the energy efficiency of the fire-tube heat generator. Since model of the process of heat transfer of gas flow in the convective tubes is multifactorial and does not have clear analytical solution at present, the study of process above is carried out using the experimental method. The results of applying the flow turbulator as a broken tape in the fire-tube heat generator of KV-GM type are presented. On their basis it can be concluded about increasing of heat transfer in convective part of the unit. The use of efficient, reliable, easy to manufacture, relatively inexpensive turbulator in domestic fire-tube heat generators will allow to increase their energy conversion efficiency and reduce fuel consumption, which will have a positive economic effect.

  3. Forest Type and Tree Characteristics Determine the Vertical Distribution of Epiphytic Lichen Biomass in Subtropical Forests

    Directory of Open Access Journals (Sweden)

    Su Li

    2017-11-01

    Full Text Available Epiphytic lichens are an important component in subtropical forests and contribute greatly to forest biodiversity and biomass. However, information on epiphytic lichens still remains scarce in forest conservation owing to the difficulty of accessing all canopy layers for direct observation. Here, epiphytic lichens were quantified on 73 whole trees in five forest types in Southwest China to clarify the vertical stratification of their biomass in subtropical forests. Lichen biomass was significantly influenced by forest type and host attributes, varying from 187.11 to 8.55 g∙tree−1 among forest types and from 289.81 to <0.01 g∙tree−1 among tree species. The vertical stratification of lichen biomass was also determined by forest type, which peaked at the top in primary Lithocarpus forest and middle-aged oak secondary forest and in the middle upper heights in other forests. Overall, the proportion of lichen biomass accounted for 73.17–100.00% of total lichen biomass on branches and 0.00–26.83% on trunks in five forests, and 64.53–100.00% and 0.00–35.47% on eight host species. Seven functional groups showed marked and various responses to tree height between and among forest types. This information improves our understanding of the distribution of epiphytic lichens in forest ecosystems and the promotion of forest management in subtropical China.

  4. Socioeconomic assessment guidance report: Determining the effects of amenity characteristics on business location decisions

    International Nuclear Information System (INIS)

    Allison, T.

    1993-02-01

    Evaluating perception-based impacts of hazardous waste facilities has become an increasingly important part of socioeconomic impact assessments in recent years. One area of discussion has been the potential effect of risk perceptions on business location decision making. This report evaluates the importance of environmental amenities (broadly defined to include natural, cultural, and recreational features; environmental quality; and other indexes of quality of life) with respect to decisions on locating both manufacturing and business service activities. It discusses the major theoretical and empirical issues that arise in attempting to determine the effects of environmental amenities on the location choices for businesses and business activities. This discussion is followed by a survey of major findings from the academic literature and a review of research by the state of Nevada. A number of recommendations for further research are also provided to help the US Department of Energy's Office of Civilian Radioactive Waste Management better understand the importance of perception-based impacts in business location decision making and estimate the scale of socioeconomic impacts that would result from siting a high-level waste repository in Nevada

  5. Socioeconomic assessment guidance report: Determining the effects of amenity characteristics on business location decisions

    Energy Technology Data Exchange (ETDEWEB)

    Allison, T.

    1993-02-01

    Evaluating perception-based impacts of hazardous waste facilities has become an increasingly important part of socioeconomic impact assessments in recent years. One area of discussion has been the potential effect of risk perceptions on business location decision making. This report evaluates the importance of environmental amenities (broadly defined to include natural, cultural, and recreational features; environmental quality; and other indexes of quality of life) with respect to decisions on locating both manufacturing and business service activities. It discusses the major theoretical and empirical issues that arise in attempting to determine the effects of environmental amenities on the location choices for businesses and business activities. This discussion is followed by a survey of major findings from the academic literature and a review of research by the state of Nevada. A number of recommendations for further research are also provided to help the US Department of Energy`s Office of Civilian Radioactive Waste Management better understand the importance of perception-based impacts in business location decision making and estimate the scale of socioeconomic impacts that would result from siting a high-level waste repository in Nevada.

  6. Determination of input/output characteristics of full-bridge AC/DC/DC converter for arc welding

    OpenAIRE

    Stefanov, Goce; Karadzinov, Ljupco; Sarac, Vasilija; Cingoski, Vlatko; Gelev, Saso

    2016-01-01

    This paper describes the design and practical implementation of AC/DC/DC converter in mode of arc welding. An analysis of the operation of AC/DC/DC converter and its input/output characteristics are determined with computer simulations. The practical part is consisted of AC/DC/DC converter prototype for arc welding with output power of 3 kW and switching frequency of 64 kHz. The operation of AC/DC/DC converter is validated with experimental measurements.

  7. Qualitative Characteristics and Determining Shelf-Life of Milk Beverage Product Supplemented with Coffee Extracts.

    Science.gov (United States)

    Yoon, Ji-Woo; Ahn, Sung-Il; Kim, Ha-Na; Park, Jun-Hong; Park, Sun-Young; Kim, Jae-Hoon; Oh, Duk-Geun; Jhoo, Jin-Woo; Kim, Gur-Yoo

    2017-01-01

    This study was conducted to establish the shelf-life of a milk beverage product supplemented with coffee extracts. Qualitative changes including peroxide value (PV), microorganism content, caffeine content, and sensory evaluation were measured periodically in beverages kept at 10, 20, and 30°C for 8 wk. Lipid oxidation of the product was measured by peroxide value analysis, and apparent changes were observed during a 4 wk storage period. Caffeine analysis revealed that the changes in caffeine content were negligible during the storage period. Total aerobic bacteria, Escherichia coli , yeast, and mold were not detected in the products during an 8 wk storage period. Sensory evaluation revealed that after 4 wk of storage overall acceptance was less than 3 points on a 5-point scale. In this study, PV was used as an indicator of the shelf-life of the milk beverage product. PV analysis revealed that a value of 20 meq/kg was the end of the shelf-life using the Arrhenius equation and the accelerated shelf-life test (ASLT). Assuming that the beverages are kept at 4°C during distribution, calculation of when the PV reached the quality limit point (20 meq/kg) was done with the equation ln(PV) = 0.3644X - 2.21834 and, using that equation, PV = e 0.3644X-2.21834 was calculated. Therefore, 14.3086 wk was determined to be the shelf-life of the milk beverage supplemented with coffee when stored at 4°C.

  8. Characteristics of the interaction of calcium with casein submicelles as determined by analytical affinity chromatography

    International Nuclear Information System (INIS)

    Jang, H.D.; Swaisgood, H.E.

    1990-01-01

    Interaction of calcium with casein submicelles was investigated in CaCl2 and calcium phosphate buffers and with synthetic milk salt solutions using the technique of analytical affinity chromatography. Micelles that had been prepared by size exclusion chromatography with glycerolpropyl controlled-pore glass from fresh raw skim milk that had never been cooled, were dialyzed at room temperature against calcium-free imidazole buffer, pH 6.7. Resulting submicelles were covalently immobilized on succinamidopropyl controlled-pore glass (300-nm pore size). Using 45Ca to monitor the elution retardation, the affinity of free Ca2+ and calcium salt species was determined at temperatures of 20 to 40 degrees C and pH 6.0 to 7.5. Increasing the pH in this range or increasing the temperature strengthened the binding of calcium to submicelles, similar to previous observations with individual caseins. However, the enthalpy change obtained from the temperature dependence was considerably greater than that reported for alpha s1- and beta-caseins. Furthermore, the elution profiles for 45Ca in milk salt solutions were decidedly different from those in CaCl2 or calcium phosphate buffers and the affinities were also greater. For example, at pH 6.7 and 30 degrees C the average dissociation constant for the submicelle-calcium complex is 0.074 mM for CaCl2 and calcium phosphate buffers, vs 0.016 mM for the milk salt solution. The asymmetric frontal boundaries and higher average affinities observed with milk salts may be due to binding of calcium salts with greater affinity in addition to the binding of free Ca2+ in these solutions

  9. Determination of the electrical characteristics of protective coatings and deposits on metals in media with low electrical conductivity

    International Nuclear Information System (INIS)

    Ovcharenko, V.I.; Koroleva, E.V.; Fedorova, A.N.; Sereda, G.A.

    1987-01-01

    This paper presents the results of a theoretical analysis and experimental determination of the electrical and associated protective characteristics of poorly conducting layers on metals, modeling both oxide and hydroxide deposits on the inner surfaces of the equipment as well as films of protective coatings. The analysis is performed using the linear low-frequency ac current (10 -3 -10 -6 Hz) method, which is based on the determination of the impedance Z, the admittance Y = 1/Z, the complex capacitance C = Y/j omega, where omega is the circular frequency of the alternating current, the complex dielectric constant epsilon, the tangent of the dielectric-loss angle tan δ and other quantities associated with them

  10. Comparison of Imaging Characteristics of 124I PET for Determination of Optimal Energy Window on the Siemens Inveon PET

    Directory of Open Access Journals (Sweden)

    A Ram Yu

    2016-01-01

    Full Text Available Purpose.124I has a half-life of 4.2 days, which makes it suitable for imaging over several days over its uptake and washout phases. However, it has a low positron branching ratio (23%, because of prompt gamma coincidence due to high-energy γ-photons (602 to 1,691 keV, which are emitted in cascade with positrons. Methods. In this study, we investigated the optimal PET energy window for 124I PET based on image characteristics of reconstructed PET. Image characteristics such as nonuniformities, recovery coefficients (RCs, and the spillover ratios (SORs of 124I were measured as described in NEMA NU 4-2008 standards. Results. The maximum and minimum prompt gamma coincidence fraction (PGF were 33% and 2% in 350~800 and 400~590 keV, respectively. The difference between best and worst uniformity in the various energy windows was less than 1%. The lowest SORs of 124I were obtained at 350~750 keV in nonradioactive water compartment. Conclusion. Optimal energy window should be determined based on image characteristics. Our developed correction method would be useful for the correction of high-energy prompt gamma photon in 124I PET. In terms of the image quality of 124I PET, our findings indicate that an energy window of 350~750 keV would be optimal.

  11. A Procedure for Determining Tire-Road Friction Characteristics Using a Modification of the Magic Formula Based on Experimental Results

    Science.gov (United States)

    Pérez, Javier; Velasco, Juan M.; Guerra, Antonio J.; Hernández, Pedro

    2018-01-01

    Knowledge of tire-road friction characteristics is essential for the proper performance of most relevant vehicle active safety systems. Therefore, its determination is necessary to improve the effectiveness of these systems and to avoid or reduce the consequences of traffic accidents. For this reason, there is a great deal of literature concerning methods and devices for measuring and modeling tire-road friction. Most of these methods have focused on determining the road friction resistance, taking only road composition and making measurements in wet conditions into account. However, friction forces are also dependent on the tire type, since the contact is established between the tire and the road in real driving conditions. Thus, the type and characteristics of the tire have to be considered in the study of the interaction between the vehicle and the road. The aim of this work is to unify the study of the friction coefficient, taking into consideration the two existing bodies involved in the contact, i.e., the tire and road and the main factors that influence the forces in the contact. To this end, a modification of the Pacejka Magic Formula is proposed to include the effects of the main parameters that influence the contact, such as road composition and its state, tire type, vehicle speed, and slip between the tire and the road. To do so, real tests have been conducted on several roads and with different operating conditions. As a result, a more accurate tire-road friction model has been obtained. PMID:29562623

  12. A Procedure for Determining Tire-Road Friction Characteristics Using a Modification of the Magic Formula Based on Experimental Results

    Directory of Open Access Journals (Sweden)

    Juan A. Cabrera

    2018-03-01

    Full Text Available Knowledge of tire-road friction characteristics is essential for the proper performance of most relevant vehicle active safety systems. Therefore, its determination is necessary to improve the effectiveness of these systems and to avoid or reduce the consequences of traffic accidents. For this reason, there is a great deal of literature concerning methods and devices for measuring and modeling tire-road friction. Most of these methods have focused on determining the road friction resistance, taking only road composition and making measurements in wet conditions into account. However, friction forces are also dependent on the tire type, since the contact is established between the tire and the road in real driving conditions. Thus, the type and characteristics of the tire have to be considered in the study of the interaction between the vehicle and the road. The aim of this work is to unify the study of the friction coefficient, taking into consideration the two existing bodies involved in the contact, i.e., the tire and road and the main factors that influence the forces in the contact. To this end, a modification of the Pacejka Magic Formula is proposed to include the effects of the main parameters that influence the contact, such as road composition and its state, tire type, vehicle speed, and slip between the tire and the road. To do so, real tests have been conducted on several roads and with different operating conditions. As a result, a more accurate tire-road friction model has been obtained.

  13. A Procedure for Determining Tire-Road Friction Characteristics Using a Modification of the Magic Formula Based on Experimental Results.

    Science.gov (United States)

    Cabrera, Juan A; Castillo, Juan J; Pérez, Javier; Velasco, Juan M; Guerra, Antonio J; Hernández, Pedro

    2018-03-17

    Knowledge of tire-road friction characteristics is essential for the proper performance of most relevant vehicle active safety systems. Therefore, its determination is necessary to improve the effectiveness of these systems and to avoid or reduce the consequences of traffic accidents. For this reason, there is a great deal of literature concerning methods and devices for measuring and modeling tire-road friction. Most of these methods have focused on determining the road friction resistance, taking only road composition and making measurements in wet conditions into account. However, friction forces are also dependent on the tire type, since the contact is established between the tire and the road in real driving conditions. Thus, the type and characteristics of the tire have to be considered in the study of the interaction between the vehicle and the road. The aim of this work is to unify the study of the friction coefficient, taking into consideration the two existing bodies involved in the contact, i.e., the tire and road and the main factors that influence the forces in the contact. To this end, a modification of the Pacejka Magic Formula is proposed to include the effects of the main parameters that influence the contact, such as road composition and its state, tire type, vehicle speed, and slip between the tire and the road. To do so, real tests have been conducted on several roads and with different operating conditions. As a result, a more accurate tire-road friction model has been obtained.

  14. Impact of the Project P.A.T.H.S. in the Junior Secondary School Years: Objective Outcome Evaluation Based on Eight Waves of Longitudinal Data

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2012-01-01

    Full Text Available To assess the effectiveness of the Tier 1 Program of the Project P.A.T.H.S., a randomized group trial with eight waves of data collected was carried out. At the fifth year of data collection, 19 experimental schools (n=2, 662 students and 24 control schools (n=3, 272 students participated in the study. Analyses based on individual growth curve modeling showed that participants in the experimental schools displayed better positive youth development than did participants in the control schools in terms of different indicators derived from the Chinese Positive Youth Development Scale, including moral competence and behavioral competence and cognitive behavioral competencies. Significant results were also found when examining the trajectories of psychological development among control and experimental participants who perceived the program to be beneficial. Findings based on longitudinal objective outcome evaluation strongly suggest that the Project P.A.T.H.S. is effective in promoting positive development in Hong Kong secondary school students.

  15. Impact of the Project P.A.T.H.S. in the junior secondary school years: objective outcome evaluation based on eight waves of longitudinal data.

    Science.gov (United States)

    Shek, Daniel T L; Ma, Cecilia M S

    2012-01-01

    To assess the effectiveness of the Tier 1 Program of the Project P.A.T.H.S., a randomized group trial with eight waves of data collected was carried out. At the fifth year of data collection, 19 experimental schools (n = 2, 662 students) and 24 control schools (n = 3, 272 students) participated in the study. Analyses based on individual growth curve modeling showed that participants in the experimental schools displayed better positive youth development than did participants in the control schools in terms of different indicators derived from the Chinese Positive Youth Development Scale, including moral competence and behavioral competence and cognitive behavioral competencies. Significant results were also found when examining the trajectories of psychological development among control and experimental participants who perceived the program to be beneficial. Findings based on longitudinal objective outcome evaluation strongly suggest that the Project P.A.T.H.S. is effective in promoting positive development in Hong Kong secondary school students.

  16. A methodological framework to determine optimum durations for the construction of soil water characteristic curves using centrifugation

    Directory of Open Access Journals (Sweden)

    Vero Sara E.

    2016-12-01

    Full Text Available During laboratory assessment of the soil water characteristic curve (SWCC, determining equilibrium at various pressures is challenging. This study establishes a methodological framework to identify appropriate experimental duration at each pressure step for the construction of SWCCs via centrifugation. Three common temporal approaches to equilibrium – 24-, 48- and 72-h – are examined, for a grassland and arable soil. The framework highlights the differences in equilibrium duration between the two soils. For both soils, the 24-h treatment significantly overestimated saturation. For the arable site, no significant difference was observed between the 48- and 72-h treatments. Hence, a 48-h treatment was sufficient to determine ‘effective equilibrium’. For the grassland site, the 48- and 72-h treatments differed significantly. This highlights that a more prolonged duration is necessary for some soils to conclusively determine that effective equilibrium has been reached. This framework can be applied to other soils to determine the optimum centrifuge durations for SWCC construction.

  17. Warm Pants and Wild Places: Domestic Anxieties in Malory’s Morte D’Arthur and T. H. White’s The Once and Future King

    DEFF Research Database (Denmark)

    McCausland, Elly

    2017-01-01

    of the Arthurian kingdom. T.H. White’s Arthuriad harnesses this tension to consider a paradox at the heart of childhood development: the need for dependent self-sufficiency. Considering 'The Once and Future King' alongside White’s turbulent personal relationship with childhood, this essay examines the ways...... in which White appropriates Malory’s Morte to emphasise the contradictions underlying constructions of childhood subjectivity, and to reconsider the fraught relationship between domesticity and the child....

  18. Impact of Project P.A.T.H.S. on adolescent developmental outcomes in Hong Kong: findings based on seven waves of data.

    Science.gov (United States)

    Shek, Daniel T L; Ma, Cecilia M S

    2012-01-18

    The present study examined the longitudinal impact of Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes) on adolescent developmental outcomes in Hong Kong. Using a longitudinal randomized group design, seven waves of data were collected from 24 experimental schools (n=4049 at wave 1) in which students participated in the Tier 1 Program of Project P.A.T.H.S. and 24 control schools (n=3797 at wave 1). Results based on individual growth curve modeling generally showed that, relative to the control participants, participants in the experimental group had: (a) a higher level of positive development; (b) a lower level of substance abuse; and (c) a lower level of delinquent behavior. Participants who regarded the program to be beneficial also showed higher levels of positive development and lower levels of problem behavior than did the control school students. The present findings suggest that Project P.A.T.H.S. is effective in promoting positive development and preventing adolescent problem behavior in Chinese adolescents in Hong Kong.

  19. Determination of performance and combustion characteristics of a diesel engine fueled with canola and waste palm oil methyl esters

    Energy Technology Data Exchange (ETDEWEB)

    Ozsezen, Ahmet Necati [Department of Automotive Engineering Technology, Kocaeli University, 41380 Izmit (Turkey); Alternative Fuels R and D Center, Kocaeli University, 41040 Izmit (Turkey); Canakci, Mustafa, E-mail: canakci@kocaeli.edu.t [Department of Automotive Engineering Technology, Kocaeli University, 41380 Izmit (Turkey); Alternative Fuels R and D Center, Kocaeli University, 41040 Izmit (Turkey)

    2011-01-15

    In this study, the performance, combustion and injection characteristics of a direct injection diesel engine have been investigated experimentally when it was fueled with canola oil methyl ester (COME) and waste (frying) palm oil methyl ester (WPOME). In order to determine the performance and combustion characteristics, the experiments were conducted at constant engine speeds under the full load condition of the engine. The results indicated that when the test engine was fueled with WPOME or COME instead of petroleum based diesel fuel (PBDF), the brake power reduced by 4-5%, while the brake specific fuel consumption increased by 9-10%. On the other hand, methyl esters caused reductions in carbon monoxide (CO) by 59-67%, in unburned hydrocarbon (HC) by 17-26%, in carbon dioxide (CO{sub 2}) by 5-8%, and smoke opacity by 56-63%. However, both methyl esters produced more nitrogen oxides (NO{sub x}) emissions by 11-22% compared with those of the PBDF over the speed range.

  20. Determination of performance and combustion characteristics of a diesel engine fueled with canola and waste palm oil methyl esters

    International Nuclear Information System (INIS)

    Ozsezen, Ahmet Necati; Canakci, Mustafa

    2011-01-01

    In this study, the performance, combustion and injection characteristics of a direct injection diesel engine have been investigated experimentally when it was fueled with canola oil methyl ester (COME) and waste (frying) palm oil methyl ester (WPOME). In order to determine the performance and combustion characteristics, the experiments were conducted at constant engine speeds under the full load condition of the engine. The results indicated that when the test engine was fueled with WPOME or COME instead of petroleum based diesel fuel (PBDF), the brake power reduced by 4-5%, while the brake specific fuel consumption increased by 9-10%. On the other hand, methyl esters caused reductions in carbon monoxide (CO) by 59-67%, in unburned hydrocarbon (HC) by 17-26%, in carbon dioxide (CO 2 ) by 5-8%, and smoke opacity by 56-63%. However, both methyl esters produced more nitrogen oxides (NO x ) emissions by 11-22% compared with those of the PBDF over the speed range.

  1. Application of Bayesian configural frequency analysis (BCFA) to determine characteristics user and non-user motor X

    Science.gov (United States)

    Mawardi, Muhamad Iqbal; Padmadisastra, Septiadi; Tantular, Bertho

    2018-03-01

    Configural Frequency Analysis is a method for cell-wise testing in contingency tables for exploratory search type and antitype, that can see the existence of discrepancy on the model by existence of a significant difference between the frequency of observation and frequency of expectation. This analysis focuses on whether or not the interaction among categories from different variables, and not the interaction among variables. One of the extensions of CFA method is Bayesian CFA, this alternative method pursue the same goal as frequentist version of CFA with the advantage that adjustment of the experiment-wise significance level α is not necessary and test whether groups of types and antitypes form composite types or composite antitypes. Hence, this research will present the concept of the Bayesian CFA and how it works for the real data. The data on this paper is based on case studies in a company about decrease Brand Awareness & Image motor X on Top Of Mind Unit indicator in Cirebon City for user 30.8% and non user 9.8%. From the result of B-CFA have four characteristics from deviation, one of the four characteristics above that is the configuration 2212 need more attention by company to determine promotion strategy to maintain and improve Top Of Mind Unit in Cirebon City.

  2. Transport characteristics of n-ZnO/p-Si heterojunction as determined from temperature dependent current–voltage measurements

    Energy Technology Data Exchange (ETDEWEB)

    Djiokap, S.R. Tankio, E-mail: stive.tankiodjiokap@nmmu.ac.za; Urgessa, Z.N.; Mbulanga, C.M.; Venter, A.; Botha, J.R.

    2016-01-01

    Zinc oxide (ZnO) nanorods have been synthesized by a two-step chemical bath deposition process on silicon substrates having different dopant densities and orientations. Scanning electron microscopy and X-ray diffraction analysis reveal that the orientation of the Si substrate does not affect the orientation, distribution or crystallinity of the nanostructures. The electrical properties of the ZnO/Si heterojunction are also investigated by current–voltage (I–V) measurements. The ideality factor is found to be 2.6 at 295 K, indicating that complex current transport mechanisms are at play. Temperature dependent I–V characteristics have been used to determine the dominant transport mechanism. The experimental results suggest that in the low bias region the current is dominated by a trap assisted multi-step tunneling process.

  3. Determination of the biometric characteristics of palatine rugae patterns in Uttar Pradesh population: a cross-sectional study.

    Science.gov (United States)

    Sekhon, Harjeet Kaur; Sircar, Keya; Singh, Sanjeet; Jawa, Deepti; Sharma, Priyanka

    2014-01-01

    Identification is the establishment of identity of an individual. The basis of dental identification is based on the observation that no two individuals can have same dentition. Palatal rugae are irregular, asymmetric ridges of the mucous membrane extending laterally from the incisive papilla and the anterior part of the palatal raphe. The location of palatal rugae inside the oral cavity confers them with stability even when exposed to high temperatures or trauma. Their resistance to trauma and their apparent unique appearance has suggested their use as a tool for forensic identification. To record the biometric characteristics of shape, size, direction, number and position of palatal rugae and analyze whether palatal rugoscopy can be used as a tool for personal identification and for sex determination. A cross-sectional study. The sample consisted of 100 subjects (50 males, 50 females) between 18 and 25 years. Maxillary impressions were made with elastomeric impression material and dental stone was used to make models. The palatal rugae patterns were traced and analyzed with a magnifying hand lens. The biometric characteristics of number, size, shape, and direction were analyzed using Thomaz and Kotz classification (1983). The casts were coded to blind the examiners about the identity of the subjects. Unpaired t-test and one-way ANOVA using SPSS 19.0 statistical program for Windows. The average number of rugae was slightly more in females. Wavy (44.9%) and curved (41.8%) shapes were more prevalent. Maximum number of rugae was found in E quadrant (40.73%). The average size was 9.221 mm. Most rugae were forwardly directed in both groups. This study concluded that rugae pattern are highly individualistic and can be used as a supplementary method for personal identification and sex determination. Further inter-observer and intra-observer variability were not found to be significant, which further validates the use of rugoscopy as a forensic tool.

  4. Determination of Some Physical Fitness and Body Composition Characteristics of Young Bocce Players in Turkish National Team

    Directory of Open Access Journals (Sweden)

    Mutlu Türkmen

    2018-02-01

    Full Text Available Bocce is gaining popularity throughout the world and is a game that is dominated by aerobic and anaerobic power-capacity, endurance, and strength and body composition. These are all important factors in order to reach a successful performance in Bocce. The purpose of this study was to determine some physical fi tness and body composition characteristics of young Bocce players in Turkish national team. A total of 26 six (14 female age 21.00±8.47 and 12 male age 19.58±3.34 Bocce players from National Team of Turkey participated in this study voluntarily. Subjects’ height, body weight, body mass index and body fat percentage were measured. Body fat percentage was determined by Yuhasz formula, and isometric dynamometer was used in order to determine knee, back, grip strength. The sit and reach test was used for the determination of fl exibility. Results indicated that Bocce players have normal body mass index and body fat percentage and ectomorphy-mesomorphy properties. Results of the isometric knee, back, right-left grip strength values of Bocce players was 77.54±24.8 kg, 90.54±26.85 kg and 36.10±9.91-34.27±10.08 respectively and have normal fl exibility (32.5±5.86. As a conclusion, the fi ndings of the present study indicated that Bocce players have almost average body fat percentage, isometric strength and fl exibility function.

  5. Determination of characteristics of degenerative joint disease using optical coherence tomography and polarization sensitive optical coherence tomography.

    Science.gov (United States)

    Xie, Tuqiang; Guo, Shuguang; Zhang, Jun; Chen, Zhongping; Peavy, George M

    2006-10-01

    Previous studies have demonstrated that optical coherence tomography (OCT) could be used to delineate alterations in the microstructure of cartilage, and have suggested that changes in the polarization state of light as detected by OCT could provide information on the birefringence properties of articular cartilage as influenced by disease. In this study we have used both OCT and polarization sensitive optical coherence tomography (PS-OCT) technologies to evaluate normal and abnormal bovine articular cartilage according to established structural, organizational, and birefringent characteristics of degenerative joint disease (DJD) in order to determine if this technology can be used to differentiate various stages of DJD as a minimally invasive imaging tool. Fresh bovine femoral-tibial joints were obtained from an abattoir, and 45 cartilage specimens were harvested from 8 tibial plateaus. Whole ex vivo specimens of normal and degenerative articular cartilage were imaged by both OCT and PS-OCT, then fixed and processed for histological evaluation. OCT/PS-OCT images and corresponding histology sections of each specimen were scored according to a modified Mankin structural grading scale and compared. OCT and PS-OCT imaging allowed structural evaluation of intact articular cartilage along a 6 mm surface length to a depth of 2 mm with a transverse resolution of 12 microm and an axial resolution of 10 microm. The OCT and PS-OCT images demonstrated characteristic alterations in the structure of articular cartilage with a high correlation to histological evaluation (kappa = 0.776). The OCT images were able to demonstrate early to advanced structural changes of articular cartilage while the optical phase retardation images obtained by PS-OCT imaging were able to discriminate areas where disorganization of the cartilage matrix was present, however, these characteristics are much different than those reported where OCT images alone were used to characterize tissue

  6. Floating Characteristics of Rudders and Elevators in Spinning Attitudes as Determined From Hinge-Moment-Coefficient Data With Application to Personal-Owner-Type Airplanes

    National Research Council Canada - National Science Library

    Bihrle, William

    1950-01-01

    A study was made of available rudder and elevator hinge-moment-coefficient-coefficient data in order to determine the floating characteristics of various types of rudders and elevators in spinning attitudes...

  7. Experimental determination of the heat transfer and cold storage characteristics of a microencapsulated phase change material in a horizontal tank

    International Nuclear Information System (INIS)

    Allouche, Yosr; Varga, Szabolcs; Bouden, Chiheb; Oliveira, Armando C.

    2015-01-01

    Highlights: • Cold storage characteristics in latent and sensible heat storage mediums were studied. • Thermo-physical characterization of the phase change material was carried out. • A non-Newtonian shear thickening behavior of the phase change material was observed. • An energy storage enhancement (53%) was observed in the latent heat storage medium. - Abstract: In the present paper, the performance of a microencapsulated phase change material (in 45% w/w concentration) for low temperature thermal energy storage, suitable for air conditioning applications is studied. The results are compared to a sensible heat storage unit using water. Thermo-physical properties such as the specific heat, enthalpy variation, thermal conductivity and density are also experimentally determined. The non-Newtonian shear-thickening behavior of the phase change material slurry is quantified. Thermal energy performance is experimentally determined for a 100 l horizontal tank. The heat transfer between the heat transfer fluid and the phase change material was provided by a tube-bundle heat exchanger inside the tank. The results show that the amount of energy stored using the phase change material is 53% higher than for water after 10 h of charging, for the same storage tank volume. It was found that the heat transfer coefficient between the phase change material and the tube wall increases during the phase change temperature range, however it remains smaller than the values obtained for water

  8. Determination of mixing characteristics of the river Kabul and the river Indus using physico-chemical and stable isotope parameters

    International Nuclear Information System (INIS)

    Qureshi, R.M.; Hussain, Q.M.; Sajjad, M.I.; Hussain, S.D.; Latif, Z.

    1990-11-01

    This report presents a comparative study on the usefulness of stable isotope parameters (hydrogen and oxygen) versus the physico-chemical parameters (electrical conductivity, temperature, pH value) of water to determine the extent of mixing of the river Kabul with the river Indus near Attock. In view of the sampling techniques employed in the present investigations, electrical conductivity and temperature are found to be the best field parameters for a quick estimate of mixing path length. However, the stable isotopes of the water molecule, due to their greater sensitivity and measuring accuracy, provide a better scenario of mixing characteristics as compared to the physico-chemical parameters. It appears that under normal flow condition, it takes about 5 km channel distance for complete mixing of the Kabul river water in the Indus river channel. A computer code MIXABC is developed to determine the percentage contribution of one river water along a mixing channel in the other river. Details of the source programs are presented. The code can be used on any IBM-compatible microsystem. (author)

  9. Determination of Spatio-Temporal Characteristics of D-region Electron Density during Annular Solar Eclipse from VLF Network Observations

    Science.gov (United States)

    Basak, T.; Hobara, Y.

    2015-12-01

    A major part of the path of the annular solar eclipse of May 20, 2012 (magnitude 0.9439) was over southern Japan. The D-region ionospheric changes associated with that eclipse, led to several degree of observable perturbations of sub-ionospheric very low frequency (VLF) radio signal. The University of Electro-Communications (UEC) operates VLF observation network over Japan. The solar eclipse associated signal changes were recorded in several receiving stations (Rx) simultaneously for the VLF signals coming from NWC/19.8kHz, JJI/22.2kHz, JJY/40.0kHz, NLK/24.8kHz and other VLF transmitters (Tx). These temporal dependences of VLF signal perturbation have been analyzed and the spatio-temporal characteristics of respective sub-ionospheric perturbations has already been studied by earlier workers using 2D-Finite Difference Time Domain method of simulation. In this work, we determine the spatial scale, depth and temporal dependence of lower ionospheric perturbation in consistence with umbral and penumbral motion. We considered the 2-parameter D-region ionospheric model with exponential electron density profile. To model the solar obscuration effect over it, we assumed a generalized space-time dependent 2-dimensional elliptical Gaussian distribution for ionospheric parameters, such as, effective reflection height (h') and sharpness factor (β). The depth (△hmax, △βmax), center of shadow (lato(t), lono(t)) and spatial scale (σlat,lon) of that Gaussian distribution are used as model parameters. In the vicinity of the eclipse zone, we compute the VLF signal perturbations using Long Wave Propagation Capability (LWPC) code for several signal propagation paths. The propagation path characteristics, such as, ground and water conductivity and geomagnetic effect on ionosphere are considered from standard LWPC prescriptions. The model parameters are tuned to set an optimum agreement between our computation and observed positive and negative type of VLF perturbations. Thus

  10. Contrast Characteristics of the Muscovitic Quartzite from Karelia, Russia - Determining the Possibility of Intensification of the Beneficiation Process

    Science.gov (United States)

    Bubnova, Tatyana; Skamnitskaya, Lubov; Gorbunova, Elena; Chertov, Alexandr

    2017-12-01

    The use of muscovite is determined by its industrial look and quality. Sheet mica is traditionally used as electrically insulating material. Crushed mica dry or wet grinding and scrap (waste from the production of sheet mica) are used as electrical insulating material (for example, mica paper), filler in the manufacture of various kinds of fillers, grout and paint etc. In addition, today there is a steady demand for micronized muscovite for the production of decorative coatings and cosmetics. On the territory of the Republic of Karelia (Russian Federation) there is a significant number of deposits and occurrences moscoviticarum rocks. Promising target small iron-poor Muscovite is the manifestation of the Eastern Hitware identified in 1999. The average mineral composition of rocks of the productive series: quartz - 10-71%; Muscovite - 8-42%; plagioclase - 1,5-28%; kyanite - 2-13,5%; biotite, and 0.1-8%; ore (pyrite, sphalerite) and 1.5 - 11%. Enrichment of this type of mineral raw materials may be carried out using traditional methods - gravity, magnetic separation, flotation. Textural-structural and mineralogical features, a high degree of secondary changes (thin intergrowths of muscovite with graphite, ferritization, the decrease of the strength characteristics) and the availability of areas and dedicated silicification abundant pyrite mineralization and its vein type significantly impoverish muscovite ore, necessitate the adjustment of technological schemes and modes of enrichment. Possibilities of improvement of processes of pretreatment and subsequent enrichment is possible using the methods of pre-sorting that represent rational and cost-effective alternative to traditional beneficiation processes. To explore the possibility of using the optical methods being preconcentration, experimental study of the contrast of properties of samples of the original ore. The study was carried out on crushed material, graded by size: -10+5; -20+10; -40+20 -60 and+40 mm. the

  11. Psychological characteristics and subjective symptoms as determinants of psychological distress in patients prior to breast cancer diagnosis.

    Science.gov (United States)

    Ando, Noriko; Iwamitsu, Yumi; Kuranami, Masaru; Okazaki, Shigemi; Wada, Mei; Yamamoto, Kenji; Todoroki, Keiko; Watanabe, Masahiko; Miyaoka, Hitoshi

    2009-11-01

    The objective of this study was to determine how psychological characteristics, subjective symptoms, a family history of breast cancer, and age impact psychological distress in outpatients at the first hospital visit prior to breast cancer diagnosis. Participants were prediagnosed women with complaints of breast symptoms who either came to our hospital directly, or with a referral from another clinic. Patients were asked to complete questionnaires to determine the following: trait anxiety (State-Trait Anxiety Inventory), negative emotional suppression (Courtauld Emotional Control Scale), life stress events (Life Experiences Survey), and psychological distress (Profile of Mood States). We examined subjective symptoms (lumps, pain, abnormal nipple discharge, or deformed nipple) and family history of breast cancer based on answers to the interview sheet filled out by patients on their first visit. We analyzed a total of 154 patients who completed the questionnaires out of 237 eligible patients. A significant model was obtained by multiple regression analysis (adjusted R (2) = 0.574, p < 0.01) in which the standard partial regression coefficients for trait anxiety, suppression of anxiety, negative life change events, positive life change events, and subjective symptoms were statistically significant (beta = 0.623, 0.133, 0.155, 0.108, and 0.124, respectively; p < 0.05). Psychological distress prior to diagnosis was higher in patients who had high trait anxiety, suppression of anxiety, many life stress events, and subjective symptoms. In particular, trait anxiety had a large impact on psychological distress, underscoring the need for and importance of adequate psychological care.

  12. Determination of diffusion coefficients and diffusion characteristics for chlorferon and diethylthiophosphate in Ca-alginate gel beads.

    Science.gov (United States)

    Ha, Jiyeon; Engler, Cady R; Lee, Seung Jae

    2008-07-01

    Diffusion characteristics of chlorferon and diethylthiophosphate (DETP) in Ca-alginate gel beads were studied to assist in designing and operating bioreactor systems. Diffusion coefficients for chlorferon and DETP in Ca-alginate gel beads determined at conditions suitable for biodegradation studies were 2.70 x 10(-11) m(2)/s and 4.28 x 10(-11) m(2)/s, respectively. Diffusivities of chlorferon and DETP were influenced by several factors, including viscosity of the bulk solution, agitation speed, and the concentrations of diffusing substrate and immobilized cells. Diffusion coefficients increased with increasing agitation speed, probably due to poor mixing at low speed and some attrition of beads at high speeds. Diffusion coefficients also increased with decreasing substrate concentration. Increased cell concentration in the gel beads caused lower diffusivity. Theoretical models to predict diffusivities as a function of cell weight fraction overestimated the effective diffusivities for both chlorferon and DETP, but linear relations between effective diffusivity and cell weight fraction were derived from experimental data. Calcium-alginate gel beads with radii of 1.65-1.70 mm used in this study were not subject to diffusional limitations: external mass transfer resistances were negligible based on Biot number calculations and effectiveness factors indicated that internal mass transfer resistance was negligible. Therefore, the degradation rates of chlorferon and DETP inside Ca-alginate gel beads were reaction-limited. (c) 2007 Wiley Periodicals, Inc.

  13. Determination of the Relationship Between Seed and Seedling Leaf Characteristics and Salt Tolerance in Watermelon [Citrullus lanatus (Thunb. Mansf.] Genotypes

    Directory of Open Access Journals (Sweden)

    Özlem ÜZAL

    2017-10-01

    Full Text Available In order to determine the relationships between salt tolerance, seed and seedling characteristics, 16 watermelon genotypes collected from various regions of Turkey, and 3 standard and 2 F1 hybrid varieties were used as material in the study. The seedlings were grown in Hoaglands nutrient solution in aqua culture in an atmospheric controlled climatic environment, and 100 mM NaCl salt stress was applied when the seedlings had 4-5 true leaves,. It has been understood that watermelon genotypes have different responses to salt stress in seedling growth and ion uptake. The watermelon genotypes 18, 22, 28, 31 and 41, with large seed weights and large cotyledon leaves were less affected from salt damage by being more selective in ion uptake. Watermelon genotypes 33, 38, 39, 40 and 44 with low seed weights and cotyledon leaf weights were not selective on ion uptake and were more affected by salt damage. It has been observed that the parameters used in the study have a high correlation with each other.

  14. STANDARD METHODS FOR THE DETERMINATION OF THE RUNWAY AND SEAKEEPING CHARACTERISTICS OF A SEAPLANE ON THE WATERS DURING FULL-SCALE TESTS

    Directory of Open Access Journals (Sweden)

    A. A. Khokhlov

    2015-01-01

    Full Text Available One of the main stages of the creation of seaplanes and amphibious aircraft are flight certification tests, including tests to determine their landing and sailing characteristics on the water. In accordance with aviation regulations (part 21 certification work is carried out according to the methods of determination of compliance (MOC, which are the main organizational and methodological document for testing. The paper discusses the main provisions of the standard methods for the determination of the runway and sea keeping characteristics of seaplanes and amphibians on water areas with full-scale tests.

  15. Evidence for the $t\\bar{t}H$ production at $\\sqrt{s} = 13$ TeV with the ATLAS detector

    CERN Document Server

    Wolff, Robert; The ATLAS collaboration

    2018-01-01

    This presentation covers a search for the associated production of the Higgs boson with a top quark pair ($t\\bar{t}H$). The search is performed in multileptonic final states using a dataset corresponding to an integrated luminosity of 36.1 fb$^{−1}$ of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy of $\\sqrt{s} =$ 13 TeV at the Large Hadron Collider. Higgs boson decays to $WW^*$, $\\tau\\tau$ and $ZZ^*$ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. New analysis techniques to suppress the main backgrounds are presented. Further the combination of this result with other $t\\bar{t}H$ searches from the ATLAS ex...

  16. Bystander Position Taking in School Bullying: The Role of Positive Identity, Self-Efficacy, and Self-Determination

    Directory of Open Access Journals (Sweden)

    Sandra K. M. Tsang

    2011-01-01

    Full Text Available School bullying has become an explicit, burgeoning problem challenging the healthy development of children and adolescents in Hong Kong. Many bullying prevention and intervention programs focus on victims and bullies, with bystanders treated as either nonexistent or irrelevant. This paper asserts that bystanders actually play pivotal roles in deciding whether the bullying process and dynamics are benign or adversarial. Bystanders' own abilities and characteristics often influence how they respond to victims and bullies. “P.A.T.H.S. to Adulthood: A Jockey Club Youth Enhancement Scheme” (P.A.T.H.S. = Positive Adolescent Training through Holistic Social Programmes is an evidence-based positive youth development program which shows that primary intervention programs have constructive impacts on junior secondary school students' beliefs and behavior. This paper asserts that intrapsychic qualities, namely identity, self-efficacy, and self-determination, greatly influence how bystanders react in school bullying situations. The paper also explains how classroom-based educational programs based on the P.A.T.H.S. model have been designed to help junior secondary school students strengthen these characteristics, so that they can be constructive bystanders when they encounter school bullying.

  17. Determination of pyrolysis characteristics and kinetics of palm kernel shell using TGA–FTIR and model-free integral methods

    International Nuclear Information System (INIS)

    Ma, Zhongqing; Chen, Dengyu; Gu, Jie; Bao, Binfu; Zhang, Qisheng

    2015-01-01

    Highlights: • Model-free integral kinetics method and analytical TGA–FTIR were conducted on pyrolysis process of PKS. • The pyrolysis mechanism of PKS was elaborated. • Thermal stability was established: lignin > cellulose > xylan. • Detailed compositions in the volatiles of PKS pyrolysis were determinated. • The interaction of biomass three components led to the fluctuation of activation energy in PKS pyrolysis. - Abstract: Palm kernel shell (PKS) from palm oil production is a potential biomass source for bio-energy production. A fundamental understanding of PKS pyrolysis behavior and kinetics is essential to its efficient thermochemical conversion. The thermal degradation profile in derivative thermogravimetry (DTG) analysis shown two significant mass-loss peaks mainly related to the decomposition of hemicellulose and cellulose respectively. This characteristic differentiated with other biomass (e.g. wheat straw and corn stover) presented just one peak or accompanied with an extra “shoulder” peak (e.g. wheat straw). According to the Fourier transform infrared spectrometry (FTIR) analysis, the prominent volatile components generated by the pyrolysis of PKS were CO 2 (2400–2250 cm −1 and 586–726 cm −1 ), aldehydes, ketones, organic acids (1900–1650 cm −1 ), and alkanes, phenols (1475–1000 cm −1 ). The activation energy dependent on the conversion rate was estimated by two model-free integral methods: Flynn–Wall–Ozawa (FWO) and Kissinger–Akahira–Sunose (KAS) method at different heating rates. The fluctuation of activation energy can be interpreted as a result of interactive reactions related to cellulose, hemicellulose and lignin degradation, occurred in the pyrolysis process. Based on TGA–FTIR analysis and model free integral kinetics method, the pyrolysis mechanism of PKS was elaborated in this paper

  18. Theoretical and experimental determination of dosimetric characteristics for brachyseed{sup TM} Pd-103, model Pd-1, source

    Energy Technology Data Exchange (ETDEWEB)

    Meigooni, A.S. E-mail: alimeig@pop.uky.edu; Zhang Hualin; Perry, Candace; Dini, S.A.; Koona, R.A

    2003-05-01

    Dosimetric characteristics of the BrachySeed{sup TM} Pd-103, Model Pd-1 source have been determined using both theoretical and experimental methods. Dose rate constant, radial dose function, and anisotropy functions of the source have been obtained following the TG-43 recommendations. Derivation of the dose rate constant was based on recent NIST WAFAC calibration performed in accordance with their 1999 Standard. Measurements were performed in Solid Water{sup TM} using LiF TLD chips. Theoretical simulation calculations were performed in both Solid Water{sup TM} and water phantom materials using MCNP4C2 Monte Carlo code using DLC-200 interaction data. The results of the Monte Carlo simulation indicated a dose rate constant of 0.65 cGy h{sup -1} U{sup -1} and 0.61 cGy h{sup -1} U{sup -1} in water and Solid Water{sup TM}, respectively. The measured dose rate constant in Solid Water{sup TM} was found to be 0.63{+-}7% cGy h{sup -1} U{sup -1}, which is within the experimental uncertainty of the Monte-Carlo simulated results. The anisotropy functions of the source were calculated in both water and in Solid Water{sup TM} at the radial distances of 1 to 7 cm. Measurements were made in Solid Water{sup TM} at distances of 2, 3, 5, and 7 cm. The Monte-Carlo calculated anisotropy constant of the new source was found to be 0.98 in water. The tabulated data and 5th order polynomial fit coefficients for the radial dose function along with the dose rate constant and anisotropy functions are provided to support clinical use of this source.

  19. Theoretical and experimental determination of dosimetric characteristics for brachyseedTM Pd-103, model Pd-1, source

    International Nuclear Information System (INIS)

    Meigooni, A.S.; Zhang Hualin; Perry, Candace; Dini, S.A.; Koona, R.A.

    2003-01-01

    Dosimetric characteristics of the BrachySeed TM Pd-103, Model Pd-1 source have been determined using both theoretical and experimental methods. Dose rate constant, radial dose function, and anisotropy functions of the source have been obtained following the TG-43 recommendations. Derivation of the dose rate constant was based on recent NIST WAFAC calibration performed in accordance with their 1999 Standard. Measurements were performed in Solid Water TM using LiF TLD chips. Theoretical simulation calculations were performed in both Solid Water TM and water phantom materials using MCNP4C2 Monte Carlo code using DLC-200 interaction data. The results of the Monte Carlo simulation indicated a dose rate constant of 0.65 cGy h -1 U -1 and 0.61 cGy h -1 U -1 in water and Solid Water TM , respectively. The measured dose rate constant in Solid Water TM was found to be 0.63±7% cGy h -1 U -1 , which is within the experimental uncertainty of the Monte-Carlo simulated results. The anisotropy functions of the source were calculated in both water and in Solid Water TM at the radial distances of 1 to 7 cm. Measurements were made in Solid Water TM at distances of 2, 3, 5, and 7 cm. The Monte-Carlo calculated anisotropy constant of the new source was found to be 0.98 in water. The tabulated data and 5th order polynomial fit coefficients for the radial dose function along with the dose rate constant and anisotropy functions are provided to support clinical use of this source

  20. Determination of the full characteristics of a journal bearing for a fast reactor sodium pump using a full scale model bearing operating in water

    International Nuclear Information System (INIS)

    Gilroy, J.E.; Dostal, M.; Jones, R.P.

    1988-01-01

    This paper describes the analytical and experimental work carried out in support of a sodium-lubricated hydrostatic bearing for the CDFR primary sodium pump. The principle objective of the work was to establish bearing characteristics under steady-state and transient running conditions. A knowledge of these characteristics is necessary for the determination of the dynamic performance of the pump under normal and transient operating conditions and also under earthquake loading conditions

  1. Comparative characteristics of shoulder blade (Scapula) and shoulder bone (Humerus) of roe deer (Capreolus capreolus) and sheep (Ovis aries) in order to determine the animal species

    OpenAIRE

    Blagojević Miloš; Nikolić Zora; Prokić Bogomir Bolka; Ćupić-Miladinović Dejana

    2016-01-01

    In illegal hunting it is often possible only on the basis of morphological characteristics to determine the animal species. By the method of comparison there was performed the forensic analysis of roe deer and sheep osteological features. For the purpose of investigating the shoulder blade (Scapula) and shoulder bone (Humerus) comparative characteristics, there were used 6 shoulder blades and 6 shoulder bones of roe deer and 8 shoulder blades and 8 shoulder...

  2. L3.PHI.CTF.P10.02-rev2 Coupling of Subchannel T/H (CTF) and CRUD Chemistry (MAMBA1D)

    Energy Technology Data Exchange (ETDEWEB)

    Salko, Robert K. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Palmtag, Scott [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Collins, Benjamin S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Kendrick, Brian [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Seker, Jeffrey [Westinghouse Electric Company LLC, Cranberry Township, PA (United States)

    2015-05-15

    The purpose of this milestone is to create a preliminary capability for modeling light water reactor (LWR) thermal-hydraulic (T/H) and CRUD growth using the CTF subchannel code and the subgrid version of the MAMBA CRUD chemistry code, MAMBA1D. In part, this is a follow-on to Milestone L3.PHI.VCS.P9.01, which is documented in Report CASL-U-2014-0188-000, titled "Development of CTF Capability for Modeling Reactor Operating Cycles with Crud Growth". As the title suggests, the previous milestone set up a framework for modeling reactor operation cycles with CTF. The framework also facilitated coupling to a CRUD chemistry capability for modeling CRUD growth throughout the reactor operating cycle. To demonstrate the capability, a simple CRUD \\surrogate" tool was developed and coupled to CTF; however, it was noted that CRUD growth predictions by the surrogate were not considered realistic. This milestone builds on L3.PHI.VCS.P9.01 by replacing this simple surrogate tool with the more advanced MAMBA1D CRUD chemistry code. Completing this task involves addressing unresolved tasks from Milestone L3.PHI.VCS.P9.01, setting up an interface to MAMBA1D, and extracting new T/H information from CTF that was not previously required in the simple surrogate tool. Speci c challenges encountered during this milestone include (1) treatment of the CRUD erosion model, which requires local turbulent kinetic energy (TKE) (a value that CTF does not calculate) and (2) treatment of the MAMBA1D CRUD chimney boiling model in the CTF rod heat transfer solution. To demonstrate this new T/H, CRUD modeling capability, two sets of simulations were performed: (1) an 18 month cycle simulation of a quarter symmetry model of Watts Bar and (2) a simulation of Assemblies G69 and G70 from Seabrook Cycle 5. The Watts Bar simulation is merely a demonstration of the capability. The simulation of the Seabrook cycle, which had experienced CRUD-related fuel rod failures, had actual CRUD-scrape data to compare with

  3. Determining

    Directory of Open Access Journals (Sweden)

    Bahram Andarzian

    2015-06-01

    Full Text Available Wheat production in the south of Khuzestan, Iran is constrained by heat stress for late sowing dates. For optimization of yield, sowing at the appropriate time to fit the cultivar maturity length and growing season is critical. Crop models could be used to determine optimum sowing window for a locality. The objectives of this study were to evaluate the Cropping System Model (CSM-CERES-Wheat for its ability to simulate growth, development, grain yield of wheat in the tropical regions of Iran, and to study the impact of different sowing dates on wheat performance. The genetic coefficients of cultivar Chamran were calibrated for the CSM-CERES-Wheat model and crop model performance was evaluated with experimental data. Wheat cultivar Chamran was sown on different dates, ranging from 5 November to 9 January during 5 years of field experiments that were conducted in the Khuzestan province, Iran, under full and deficit irrigation conditions. The model was run for 8 sowing dates starting on 25 October and repeated every 10 days until 5 January using long-term historical weather data from the Ahvaz, Behbehan, Dezful and Izeh locations. The seasonal analysis program of DSSAT was used to determine the optimum sowing window for different locations as well. Evaluation with the experimental data showed that performance of the model was reasonable as indicated by fairly accurate simulation of crop phenology, biomass accumulation and grain yield against measured data. The normalized RMSE were 3%, 2%, 11.8%, and 3.4% for anthesis date, maturity date, grain yield and biomass, respectively. Optimum sowing window was different among locations. It was opened and closed on 5 November and 5 December for Ahvaz; 5 November and 15 December for Behbehan and Dezful;and 1 November and 15 December for Izeh, respectively. CERES-Wheat model could be used as a tool to evaluate the effect of sowing date on wheat performance in Khuzestan conditions. Further model evaluations

  4. Process evaluation of the project P.A.T.H.S. (secondary 2 program): findings based on the co-walker scheme.

    Science.gov (United States)

    Shek, Daniel T L; Tam, Suet-yan

    2009-01-01

    To understand the implementation quality of the Tier 1 Program (Secondary 2 Curriculum) of the P.A.T.H.S. Project, process evaluation was carried out by co-walkers through classroom observation of 195 units in 131 schools. Results showed that the overall level of program adherence was generally high with an average of 84.55%, and different factors of the implementation process were evaluated as positive. Quality of program implementation and achievement of program objectives were predicted by students' participation and involvement, strategies to enhance students' motivation, opportunity for reflection, time management, and class preparation. Success in program implementation was predicted by students' participation and involvement, classroom control, interactive delivery method, strategies to enhance students' motivation, opportunity for reflection, and lesson preparation.

  5. A Case Study on the Implementation of a Positive Youth Development Program (Project P.A.T.H.S. in Hong Kong: Learning from the Experimental Implementation Phase

    Directory of Open Access Journals (Sweden)

    Tak Yan Lee

    2008-01-01

    Full Text Available This investigation of the implementation of a positive youth development program (Project P.A.T.H.S. was part of a large study undertaken comprehensively to explore how effective the Tier 1 Program was in practice and how the results can shed light on future developments. Utilizing a case study approach, individual and focus group interviews were conducted in 2007 to examine the factors that influence the process and quality of implementation of the Tier 1 Program of the Project P.A.T.H.S. The focus of this study was on how the implementers of a school made use of the experience gained in the Experimental Implementation Phase (EIP in 2005/06 to improve the program implementation quality in the Full Implementation Phase (FIP in 2006/07. Results showed that the program implementation in the FIP was generally high and the program was well received by the implementers. Factors that facilitated the implementation of the program were identified, including the adoption of an incremental change strategy, the incorporation of the program into both formal and informal curricula, positive perceptions of the program among staff and agency social workers, sufficient school administrative support, excellent cooperation between the school and the social work agency, presence of a dedicated school contact person and instructors who engaged themselves in continuous quality improvement of the implementation, and an emphasis on application of what had been learned. Difficulties encountered by the school in the process of implementation were also observed. Based on the present findings, key process variables that facilitate or impede the implementation of positive youth development programs are discussed. Implications for future program implementation are also discussed.

  6. Improvement of the NSSS T/H Module ARTS for Enhancing the Simulation Fidelity of YGN no 1/2 Simulator

    International Nuclear Information System (INIS)

    Seo, In Yong; Lee, Myung Soo; Lee, Yong Kwan; Suh, Jae Seung; Jeun, Gyoo Dong

    2006-01-01

    KEPRI(Korea Electric Power Research Institute) and KAERI(Korea Atomic Energy Research Institute) developed a NSSS (Nuclear Steam Supply System) T/H (Thermal-Hydraulic) module (named ARTS) based on the best-estimate code RETRAN-3D for the KNPEC-2 full-scope simulator in 2001. Although ARTS can simulate the most transients in real-time, and its robustness is ensured, real-time calculation and robustness can fail for large break loss-of-coolant accident (LBLOCA) and long term, two-phase transients. In order to improve its robustness, ARTS equipped with the backup calculation module to be used whenever a regular ARTS module fails to calculate. When the symptom for the failure of T/H module is detected, the main ARTS module is replaced with the backup module for the calculation of primary and secondary reactor system although most failures of ARTS occur in the calculation of the primary system especially for LBLOCA simulation. The sudden transition from the main ARTS module to the backup module can exhibit the discontinuity of simulation of secondary system on rare occasions. To mitigate the simulation discontinuity, we have improved the backup module of ARTS. The performance of a new approach has been illustrated by the non-integrated standalone test. The improved ARTS module will be incorporated into YGN no. 1/2 simulator and evaluated its performance in the real simulator environment. This paper presents the brief description of a new backup calculation strategy and the simulation results of LOCA to evaluate the performance of a new backup strategy in standalone test environment

  7. Extreme conditions (p, T, H)

    Energy Technology Data Exchange (ETDEWEB)

    Mesot, J [Lab. for Neutron Scattering ETH Zurich, Zurich (Switzerland) and Paul Scherrer Institute, Villigen (Switzerland)

    1996-11-01

    The aim of this paper is to summarize the sample environment which will be accessible at the SINQ. In order to illustrate the type of experiments which will be feasible under extreme conditions of temperature, magnetic field and pressure at the SINQ a few selected examples are also given. (author) 7 figs., 14 refs.

  8. The importance of job characteristics in determining medical care-seeking in the Dutch working population, a longitudinal survey study.

    Science.gov (United States)

    Steenbeek, Romy

    2012-08-31

    The working population is ageing, which will increase the number of workers with chronic health complaints, and, as a consequence, the number of workers seeking health care. It is very important to understand factors that influence medical care-seeking in order to control the costs. I will investigate which work characteristics independently attribute to later care-seeking in order to find possibilities to prevent unnecessary or inefficient care-seeking. Data were collected in a longitudinal two-wave study (n = 2305 workers). The outcome measures were visits (yes/no and frequency) to a general practitioner (GP), a physical therapist, a medical specialist and/or a mental health professional. Multivariate regression analyses were carried out separately for men and women for workers with health complaints. In the Dutch working population, personal, health, and work characteristics, but not sickness absence, were associated with later care-seeking. Work characteristics independently attributed to medical care-seeking but only for men and only for the frequency of visits to the GP. Women experience more health complaints and seek health care more often than men. For women, experiencing a work handicap (health complaints that impede work performance) was the only work characteristic associated with more care-seeking (GP). For men, work characteristics that led to less care-seeking were social support by colleagues (GP frequency), high levels of decision latitude (GP frequency) and high levels of social support by the supervisor (medical specialist). Other work characteristics led to more care-seeking: high levels of engagement (GP), full time work (GP frequency) and experiencing a work handicap (physical therapist). We can conclude that personal and health characteristics are most important when explaining medical care-seeking in the Dutch working population. Work characteristics independently attributed to medical care-seeking but only for men and only for the

  9. Willingness to Adopt or Reuse an E-Learning System: The Perspectives of Self-Determination and Perceived Characteristics of Innovation

    Science.gov (United States)

    Chang, Hsin Hsin; Fu, Chen Su; Huang, Ching Ying

    2017-01-01

    Adopting self-determination theory and the perceived characteristics of innovation as the theoretical background, this study investigates the school teachers' willingness to adopt and reuse an e-learning system. Three hundred and eighty-eight valid questionnaires were collected for analysis using structural equation modelling. The results…

  10. Towards a Determination of the Physiological Characteristics Distinguishing Successful Mixed Martial Arts Athletes: A Systematic Review of Combat Sport Literature.

    Science.gov (United States)

    James, Lachlan P; Haff, G Gregory; Kelly, Vincent G; Beckman, Emma M

    2016-10-01

    Mixed martial arts (MMA) is a combat sport underpinned by techniques from other combat disciplines, in addition to strategies unique to the sport itself. These sports can be divided into two distinct categories (grappling or striking) based on differing technical demands. Uniquely, MMA combines both methods of combat and therefore appears to be physiologically complex requiring a spectrum of mechanical and metabolic qualities to drive performance. However, little is known about the physiological characteristics that distinguish higher- from lower-level MMA athletes. Such information provides guidance for training interventions, performance testing and talent identification. Furthermore, while MMA incorporates techniques from both grappling and striking sports, it is unknown precisely how these disciplines differ physiologically. Understanding the relationship between higher-level competitors in grappling and striking combat sports can provide further insight into the development of the optimal performance profile of a higher-level MMA athlete. This article aims to analyse the scientific literature on MMA and the primary combat sports underpinning it to determine the physiological adaptations that distinguish superior competitors, with a view to defining the optimal physiological profile for higher-level MMA performance. Furthermore, this article will explore the differences in these capabilities between grappling- and striking-based combat sports in the context of MMA. A literature search was undertaken via PubMed, Web of Science, SportDiscus and Google Scholar. The following sports were included for systematic review based on their relevance to MMA: mixed martial arts, boxing, Brazilian jiu-jitsu, judo, karate, kickboxing, Muay Thai and wrestling. The inclusion criteria allowed studies that compared athletes of differing competition levels in the same sport using a physiological performance measure. Only male, adult (aged 17-40 years), able-bodied competitors

  11. What determines product ramp-up performance? : a review of characteristics based on a case study at Nokia Mobile Phones

    NARCIS (Netherlands)

    Pufall, A.A.; Fransoo, J.C.; Kok, de A.G.

    2007-01-01

    We present a conceptual model to explore the essential characteristics that affect product ramp-up performance in the consumer electronics industry, specifically in the mobile phones sector. Our findings are based on data analysis within Nokia’s mobile phones business group. Fast product ramp-ups

  12. Amazon poison frogs (Ranitomeya amazonica) use different phytotelm characteristics to determine their suitablility for egg and tadpole deposition

    NARCIS (Netherlands)

    Poelman, E.H.; Wijngaarden, van R.P.A.; Raaijmakers, C.E.

    2013-01-01

    Parents have to assess the multivariate characteristics of their reproductive sites to maximize their reproductive success through offspring performance. In addition, they may provide care to ensure optimal performance of their offspring. In poison frogs it has been identified that ecological

  13. Determinants of timely completion : the impact of Bachelor's degree programme characteristics and student motivation on study progress

    NARCIS (Netherlands)

    Suhre, Cor J. M.; Jansen, Ellen P. W. A.; Torenbeek, M.

    2013-01-01

    Timely completion of university degree programmes is a topic of growing concern to higher education institutions and their students. This paper reports on a study about the impact of degree programme characteristics and student motivation on study progress. The setting for the study is a Dutch law

  14. A Comprehensive Examination of the Determinants for Food Risk Perception: Focusing on Psychometric Factors, Perceivers' Characteristics, and Media Use.

    Science.gov (United States)

    You, Myoungsoon; Ju, Youngkee

    2017-01-01

    Risk characteristics within a psychometric paradigm have been of major concern in studies of food risk perception. This study compared the influence of psychometric factors, perceivers' characteristics (i.e., risk attitude, trust, and favorability of the country of origin), and that of the news media on the levels of food risk perception. The interaction of news media with the other two factors was also examined. A nationwide survey (n = 1,500) was conducted. The foods under investigation were Chinese processed foods and Japanese seafood imported to South Korea. In both cases, hierarchical multiple regression analyses revealed that psychometric factors had the greatest influence on food risk perception, followed by perceivers' characteristics and media use. In addition, our results showed that the effect of perceived benefit and dread in Chinese food were salient only for those with little media use. The implication of the interaction effect on food risk perception is discussed in terms of accessibility and limited capacity of information processing.

  15. Interim Evaluation of the Tier 1 Program (Secondary 1 Curriculum of the Project P.A.T.H.S.: First Year of the Full Implementation Phase

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2008-01-01

    Full Text Available To understand the implementation quality of the Tier 1 Program (Secondary 1 Curriculum of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes in the full implementation phase, 100 schools were randomly selected to participate in personal and/or telephone interviews regarding the quality of the implementation process of the Tier 1 Program. In the interviews, the participants described the responses of the students to the program, the perceived benefits of the program, the perceived good aspects of the program, and the areas requiring improvement, difficulties encountered in the implementation process, and perceived attributes of the worker-support scheme (“Co-Walker Scheme”. Results showed that most workers perceived that the students had positive responses to the program and the program was beneficial to the students. They also identified several good aspects in the program, although negative comments on the program design and difficulties in the implementation process were also recorded. Roughly half of the respondents had positive comments on the “Co-Walker Scheme”. In sum, the respondents generally regarded the program as beneficial to the students and they were satisfied with the Tier 1 Program (Secondary 1 Curriculum in the full implementation phase, although some implementation difficulties were also expressed.

  16. Process Evaluation of the Tier 1 Program (Secondary 1 Curriculum of the Project P.A.T.H.S.: Findings Based on the Full Implementation Phase

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2008-01-01

    Full Text Available To understand the implementation quality of the Tier 1 Program (Secondary 1 Curriculum of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes, observers carried out process evaluation in the form of systematic observations of 22 units in 14 randomly selected schools. Results showed that the overall level of program adherence was generally high (range: 45–100%, with an average of 86.3%. High implementation quality of the program in the areas of student interest, student participation and involvement, classroom control, use of interactive delivery method, use of strategies to enhance student motivation, use of positive and supportive feedbacks, instructors’ familiarity with the students, degree of achievement of the objectives, time management, lesson preparation, overall implementation quality, and success of implementation was also found. The present findings are consistent with those observations based on the experimental implementation phase, suggesting that the implementation quality of the Tier 1 Program (Secondary 1 Curriculum was generally high.

  17. Signal to background interference in p p →t H-→t W-b b ¯ at the LHC Run II

    Science.gov (United States)

    Arhrib, Abdesslam; Benbrik, Rachid; Moretti, Stefano; Santos, Rui; Sharma, Pankaj

    2018-04-01

    We investigate in the Large Hadron Collider (LHC) environment the possibility that sizeable interference effects between a heavy charged Higgs boson signal produced via b g →t H- (+c .c . ) scattering and decaying via H-→W-A →W-b b ¯ (+c .c . ) and the irreducible background given by b g →t W-b b ¯ topologies could spoil current search approaches where the former and latter channels are treated separately. The rationale for this comes from the fact that a heavy charged Higgs state can have a large width, which can also happen for the C P -odd neutral Higgs state emerging in the ensuing decays, which in turn enables such interferences. We conclude that effects are very significant, both at the inclusive and exclusive level (i.e., both before and after H± selection cuts are enforced, respectively) and typically of a destructive nature. This, therefore, implies that currently established LHC reaches for heavy charged Higgs bosons require some level of rescaling. However, this is possible a posteriori, as the aforementioned H± selection cuts shape the interference contributions at the differential level in a way similar to that of the isolated H± signal, so there is no need to reassess the efficiency of the individual cuts. We show such effects quantitatively by borrowing benchmark points from different Yukawa types of a 2-Higgs doublet model parameter space for H± values starting from around 200 GeV.

  18. Evidence for the $t\\bar{t}H$ production at $\\sqrt{s}=$ 13 TeV with the ATLAS detector

    CERN Document Server

    Wolff, Robert; The ATLAS collaboration

    2018-01-01

    This presentation covers a search for the associated production of the Higgs boson with a top quark pair ($t\\bar{t}H$). The search is performed in multilepton final states using a dataset corresponding to an integrated luminosity of 36.1 fb$^{−1}$ of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy of $\\sqrt{s} =$ 13 TeV at the Large Hadron Collider. Higgs boson decays to $WW^*$, $\\tau\\tau$ and $ZZ^*$ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. New analysis techniques to suppress the main backgrounds and details on the statistical extraction of results are presented. Further the combination of this resul...

  19. A comparison of fuzzy logic and cluster renewal approaches for heat transfer modeling in a 1296 t/h CFB boiler with low level of flue gas recirculation

    Directory of Open Access Journals (Sweden)

    Błaszczuk Artur

    2017-03-01

    Full Text Available The interrelation between fuzzy logic and cluster renewal approaches for heat transfer modeling in a circulating fluidized bed (CFB has been established based on a local furnace data. The furnace data have been measured in a 1296 t/h CFB boiler with low level of flue gas recirculation. In the present study, the bed temperature and suspension density were treated as experimental variables along the furnace height. The measured bed temperature and suspension density were varied in the range of 1131-1156 K and 1.93-6.32 kg/m3, respectively. Using the heat transfer coefficient for commercial CFB combustor, two empirical heat transfer correlation were developed in terms of important operating parameters including bed temperature and also suspension density. The fuzzy logic results were found to be in good agreement with the corresponding experimental heat transfer data obtained based on cluster renewal approach. The predicted bed-to-wall heat transfer coefficient covered a range of 109-241 W/(m2K and 111-240 W/(m2K, for fuzzy logic and cluster renewal approach respectively. The divergence in calculated heat flux recovery along the furnace height between fuzzy logic and cluster renewal approach did not exceeded ±2%.

  20. Evaluation of the Tier 1 Program of Project P.A.T.H.S.: Secondary Data Analyses of Conclusions Drawn by the Program Implementers

    Directory of Open Access Journals (Sweden)

    Daniel T. L. Shek

    2008-01-01

    Full Text Available The Tier 1 Program of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes is a curricula-based positive youth development program. In the experimental implementation phase, 52 schools participated in the program. Based on subjective outcome evaluation data collected from the program participants (Form A and program implementers (Form B in each school, the program implementers were invited to write down five conclusions based on an integration of the evaluation findings (N = 52. The conclusions stated in the 52 evaluation reports were further analyzed via secondary data analyses in this paper. Results showed that most of the conclusions concerning perceptions of the Tier 1 Program, instructors, and effectiveness of the programs were positive in nature. There were also conclusions reflecting the respondents’ appreciation of the program. Finally, responses on the difficulties encountered and suggestions for improvements were observed. In conjunction with the previous evaluation findings, the present study suggests that the Tier 1 Program was well received by the stakeholders and the program was beneficial to the development of the program participants.

  1. Disease characteristics as determinants of the labour market position of adolescents and young adults with chronic digestive disorders.

    NARCIS (Netherlands)

    Calsbeek, H.; Rijken, M.; Dekker, J.; Berge Henegouwen, G.P. van

    2006-01-01

    BACKGROUND: Job prospects can be problematic for young patients with chronic digestive disorders. OBJECTIVES: To compare the employment status and disease burden in young adult patients with several chronic digestive disorders with healthy controls, and to determine whether labour participation

  2. Women and entrepreneurial challenge in Spain, characteristics and determinants; Mujer y desafio emprendedor en Espana. Caracteristicas y determinantes

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz Navarro, J.; Camelo Ordaz, M. C.; Coduras Martinez, A.

    2012-11-01

    This article contextualizes the discrete level of female entrepreneur ship in Spain and its differential aspects. It includes an analysis of the general characteristics of female entrepreneur ship, grouping them into contextual, demographic and perceptual factors. In addition, it considers in more depth those that promote or hinder the development of female entrepreneur ship: social networks, access to finance and the institutional framework supporting entrepreneurial activity. Finally, it makes a number of specific recommendations in order to correct the major weaknesses in this area and exploit female entrepreneur ship opportunities in Spain. (Author) 49 refs.

  3. Determination of the characteristic limits and responses of nuclear track detectors in mixed radon and thoron atmospheres

    International Nuclear Information System (INIS)

    Röttger, Annette; Honig, Anja; Schrammel, Dieter; Strauss, Heinrich F.

    2016-01-01

    Closed nuclear track detectors are widely used for the determination of Rn-222 exposures. There are also partial open systems available, which are specially designed for the determination of the exposure to Rn-220, which is a relevant exposure in special workplaces or in specific regions of the world. This paper presents data and a detail analysis of how to determine the cross-correlation by calibration in pure Rn-222 and pure Rn-220 atm. By these means calibration coefficients for the analysis of real mixed atmospheres can be obtained. The respective decision threshold, detection limit and limits of the confidence interval were determined according to ISO 11929 (ISO 11929:2010, 2010). The exposure of detectors was performed at the radon reference chamber and the thoron progeny chamber of the Physikalisch-Technische Bundesanstalt (PTB). The analysis of track response was done at Parc RGM, while the analytical routines were developed in the Leibniz University Hanover, Institute Radioökologie und Strahlenschutz IRS at the working Group AK SIGMA (Arbeitskreis Nachweisgrenzen). - Highlights: • Analysis of exposure in reference atmospheres according ISO 11929. • Calibration of nuclear track detectors for 222 Rn and 220 Rn. • Calculation of cross-correlation by calibration in pure 222 Rn and 220 Rn atmospheres. • Thoron activity concentration should not be omitted in radon exposure determinations.

  4. METHOD FOR DETERMINATION OF THERMAL CHARACTERISTICS OF THE LAYER OF GRANULAR MEDIA WITH ELEMENTS OF PULSED THERMAL NDT

    Directory of Open Access Journals (Sweden)

    Y. V. Shokina

    2015-01-01

    Full Text Available At the Department of Food Production of Murmansk State Technical University (MSTU was developed a method of producing smoke fuel using infrared energy supply. The method provides a stable temperature pyrolysis of wood fuel is less than 400 ° C. Kinetic of the heating layer of fuel (wooden chips is affected by chip's density and moisture content. The method of calculating of the optimum modes of smoke produce, which is based on a system of differential equations of heat and mass transfer in the IR smoke generator, was previously proposed. The system of equations includes thermal characteristics (TC of the fuel layer (e.g. specific heat, thermal conductivity, thermal diffusivity. The exact definition of these characteristics affect the accuracy of the experimental calculation of optimal process conditions with use of the developed software. A definition of layer's TC by a method with elements of pulsed thermal NDT. The use of thermal imager is proposed for measuring the temperature of the irritated surface of the porous wooden chip's lawyer.

  5. New computational and experimental methods for determining the elastic and strength characteristics of materials and for predicting the behavior of structures

    Science.gov (United States)

    Lyukshin, B. A.; Barashkov, V. N.; Gerasimov, A. V.; Elkin, E. E.; Likhachev, V. N.; Mudarisov, Sh. Sh.; Cherepanov, O. I.

    1993-04-01

    Experimental methods for determining the physicomechanical characteristics of powder, polymer, and composite materials under thermal-force static and dynamic loads are presented. The results of the experimental investigations are used in numerical methods for calculating the stress — strain state and the stability and for describing the supercritical behavior as well as in methods for efficient design of strong machine-building structures made from new constructional materials.

  6. Ultra violet resonance Raman spectroscopy in lignin analysis: determination of characteristic vibrations of p-hydroxyphenyl, guaiacyl, and syringyl lignin structures.

    Science.gov (United States)

    Saariaho, Anna-Maija; Jääskeläinen, Anna-Stiina; Nuopponen, Mari; Vuorinen, Tapani

    2003-01-01

    Raman spectroscopy of wood and lignin samples is preferably carried out in the near-infrared region because lignin produces an intense laser-induced fluorescence background at visible excitation wavelengths. However, excitation of aromatic and conjugated lignin structures with deep ultra violet (UV) light gives resonance-enhanced Raman signals while the overlapping fluorescence is eliminated. In this study, ultra violet resonance Raman (UVRR) spectroscopy was used to define characteristic vibration bands of model compounds of p-hydroxyphenyl, guaiacyl, and syringyl lignin structures at three excitation wavelengths (229, 244, and 257 nm). The intensities of each band, relative to the intensity of the aromatic vibration band at 1600 cm-1, were defined and the most suitable excitation wavelength was suggested for each structure. p-Hydroxyphenyl structures showed intensive characteristic bands at 1217-1214 and 1179-1167 cm-1 with excitation at 244 nm, whereas the bands of guaiacyl structures were more intensive with 257 nm excitation. Most intensive characteristic bands of guaiacyl structures were found at 1289-1279, 1187-1185, 1158-1155, and 791-704 cm-1. Syringyl structures had almost identical spectra with 244 and 257 nm excitations with characteristic bands at 1514-1506, 1333-1330, and 981-962 cm-1. The characteristic bands of the three structural units were also found from the compression wood, softwood, and hardwood samples, indicating that UVRR spectroscopy can be applied for the determination of chemical structures of lignin.

  7. Improvement of direct determination of trace nickel in environmental samples by diffuse reflection spectroscopy using chromaticity characteristics.

    Science.gov (United States)

    Ershova, N I; Ivanov, V M

    2000-05-01

    Cellulose and chromaton-N-super as solid supports for direct determination of the immobilized nickel complexes with dimethylglyoxime and benzyldioxime by diffuse reflection spectroscopy were compared. The advantage of chromaton-N-super with use of benzyldioxime is shown. Detection limit is 0.02 microg/mL. The proposed method was applied for the analysis of soil.

  8. Process and device for determining the effect of river water heating by waste heat on its temperature characteristics

    International Nuclear Information System (INIS)

    Pietzsch, L.; Kauer, H.; Lautersack, K.

    1979-01-01

    It is proposed to use measurements for determining the effect of heating river water by introducing waste heat from industrial plants or power-stations, instead of deriving the effect from calculations. A suitable method of measurement is proposed and discussed. (UWI) 891 HP/UWI 892 CKA [de

  9. Determination of the biometric characteristics of palatine rugae patterns in Uttar Pradesh population: A cross-sectional study

    Directory of Open Access Journals (Sweden)

    Harjeet Kaur Sekhon

    2014-01-01

    Conclusion: This study concluded that rugae pattern are highly individualistic and can be used as a supplementary method for personal identification and sex determination. Further inter-observer and intra-observer variability were not found to be significant, which further validates the use of rugoscopy as a forensic tool.

  10. Molecular characteristics of antimicrobial resistance and virulence determinants of Staphylococcus aureus isolates derived from clinical infection and food.

    Science.gov (United States)

    Luo, Kui; Shao, Fuye; Kamara, Kadijatu N; Chen, Shuaiyin; Zhang, Rongguang; Duan, Guangcai; Yang, Haiyan

    2018-04-20

    Staphylococcus aureus (S. aureus) is an important human etiologic agent. An investigation of the characteristics of common genotypes of S. aureus relating to pathogenicity and antibiotic resistance may provide a foundation to prevent infection. This study collected 275 S. aureus isolates from Zhengzhou city in China, including 148 isolates from patient samples and 127 isolates from ready-to-eat food samples. Antimicrobial susceptibility testing was performed using the broth dilution method. Molecular characteristics of antimicrobial resistance, virulence, and genotypes were identified by polymerase chain reaction (PCR). In total, 34.18% (94/275) of S. aureus isolates were MRSA. Compared with food isolates, clinical isolates had significantly higher antibiotic resistance rates, carrying resistance genes such as acc(6')/aph(2'), aph(3')-III, ermA, and ermB and virulence genes such as tetM, sea, seb, pvl, and etb. MRSA-t030-agrI-SCCmecIII and MSSA-t002-agrII were the most common strain types among clinical strains, and MRSA-t002-agrII-SCCmecIII and MSSA-t002-agrII were the most common strain types among food strains. Additionally, some strains in the agr group were also spa type-specific, suggesting that there may be phenotypic consistency. Clinical isolates contained higher numbers of resistance genes and demonstrated higher antibiotic resistance, while 2 source strains exhibited high toxicity. These results indicate that bacteria with different origins may have undergone different evolutionary processes. As resistance and virulence factors in food bacteria can be transmitted to humans, food handlers should strictly follow hygienic measures during food production to ensure the safety of human consumers. © 2018 Wiley Periodicals, Inc.

  11. Menstrual cycle characteristics as determinants of plasma concentrations of perfluoroalkyl substances (PFASs) in the Norwegian Mother and Child Cohort (MoBa study).

    Science.gov (United States)

    Singer, Alison B; Whitworth, Kristina W; Haug, Line S; Sabaredzovic, Azemira; Impinen, Antti; Papadopoulou, Eleni; Longnecker, Matthew P

    2018-06-04

    Perfluoroalkyl substances (PFASs) are fluorinated organic compounds that have been used in a variety of industrial and consumer applications. Menstruation is implicated as a possible route of elimination for PFASs in women. The overall purpose of this study was to examine menstrual cycle characteristics as determinants of plasma PFAS concentrations in women. Our study sample consisted of 1977 pregnant women from the Norwegian Mother and Child Cohort (MoBa) study. The women were asked about menstrual cycle regularity in the year before the pregnancy and typical menstrual cycle length as well as other demographic and reproductive characteristics in a questionnaire completed during the pregnancy. Blood samples were collected around 17-18 weeks gestation and PFAS concentrations were measured in plasma. We examined the association between menstrual cycle characteristics and seven PFASs (perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), perfluorodecanoic acid (PFDA), perfluoroundecanoic acid (PFUnDA), perfluorohexane sulfonate (PFHxS), perfluoroheptane sulfonate (PFHpS), and perfluorooctane sulfonate (PFOS)) using multiple linear regression, adjusted for age, pre-pregnancy body mass index, smoking, education, income, parity, oral contraceptive use, inter-pregnancy interval, and breastfeeding duration. Irregular cycles were not associated with PFAS concentrations. Overall, we found no evidence of associations between menstrual cycle length and PFAS concentrations. In subgroup analyses we found some evidence, among parous women, of decreased PFHpS and PFOS with short menstrual cycles; we also found, among recent OC users (in the 12 months before the questionnaire) increased PFNA and PFUnDA with long cycle length. Limitations of our study include misclassification of menstrual cycle characteristics, small sample sizes in the sub-group analyses, and a lack of information on duration and volume of menses. In the entire study sample, we found little evidence of

  12. The methodological basis for determining individual characteristics of volleyball players at the stage of basic training specialist.

    Directory of Open Access Journals (Sweden)

    Kozina Zh.L.

    2012-03-01

    Full Text Available Purpose of work - to form and methodologically ground conception of individualization of training process in the playing types of sport. The algorithm of determination of individual features is presented in the structure of preparedness of skilled volley-ballers. In research 20 volley-ballers took part on the stage of the specialized base preparation. The stages of determination of command and individual factor structure of preparedness of sportswomen are presented. It is exposed that individual descriptions of volley-ballers and their line of business not always are related exceptionally to anthropometric information. Descriptions also depend and from the row of other physiological and психофизиологических indexes. These indexes for certain differentiate for the players of different line of role.

  13. Determination of the Neutron Fluence, the Beam Characteristics and the Backgrounds at the CERN-PS TOF Facility

    CERN Multimedia

    Leal, L C; Kitis, G; Guber, K H; Quaranta, A; Koehler, P E

    2002-01-01

    In the scope of our programme we propose to start in July 2000 with measurements on elements of well known cross sections, in order to check the reliability of the whole experimental installation at the CERN-TOF facility. These initial exploratory measurements will provide the key-parameters required for the further experimentation at the CERN-TOF neutron beam. The neutron fluence and energy resolution will be determined as a function of the neutron kinetic energy by reproducing standard capture and fission cross sections. The measurements of capture cross sections on elements with specific cross section features will allow to us to disentangle the different components of backgrounds and estimate their level in the experimental area. The time-energy calibration will be determined and monitored with a set of monoenergetic filters as well as by the measurements of elements with resonance-dominated cross sections. Finally, in this initial phase the behaviour of several detectors scheduled in successive measureme...

  14. Molecular characteristics of extended-spectrum beta-lactamases and qnr determinants in Enterobacter species from Japan.

    Science.gov (United States)

    Kanamori, Hajime; Yano, Hisakazu; Hirakata, Yoichi; Hirotani, Ayako; Arai, Kazuaki; Endo, Shiro; Ichimura, Sadahiro; Ogawa, Miho; Shimojima, Masahiro; Aoyagi, Tetsuji; Hatta, Masumitsu; Yamada, Mitsuhiro; Gu, Yoshiaki; Tokuda, Koichi; Kunishima, Hiroyuki; Kitagawa, Miho; Kaku, Mitsuo

    2012-01-01

    The incidence of extended-spectrum β-lactamases (ESBLs) has been increasing worldwide, but screening criteria for detection of ESBLs are not standardized for AmpC-producing Enterobacteriaceae such as Enterobacter species. In this study, we investigated the prevalence of ESBLs and/or AmpC β-lactamases in Japanese clinical isolates of Enterobacter spp. and the association of plasmid-mediated quinolone resistance (PMQR) determinants with ESBL producers. A total of 364 clinical isolates of Enterobacter spp. collected throughout Japan between November 2009 and January 2010 were studied. ESBL-producing strains were assessed by the CLSI confirmatory test and the boronic acid disk test. PCR and sequencing were performed to detect CTX-M, TEM, and SHV type ESBLs and PMQR determinants. For ESBL-producing Enterobacter spp., pulsed-field gel electrophoresis (PFGE) was performed using XbaI restriction enzyme. Of the 364 isolates, 22 (6.0%) were ESBL producers. Seven isolates of Enterobacter cloacae produced CTX-M-3, followed by two isolates producing SHV-12. Two isolates of Enterobacter aerogenes produced CTX-M-2. Of the 22 ESBL producers, 21 had the AmpC enzyme, and six met the criteria for ESBL production in the boronic acid test. We found a significant association of qnrS with CTX-M-3-producing E. cloacae. The 11 ESBL-producing Enterobacter spp. possessing bla(CTX-M), bla(SHV), or bla(TEM) were divided into six unique PFGE types. This is the first report about the prevalence of qnr determinants among ESBL-producing Enterobacter spp. from Japan. Our results suggest that ESBL-producing Enterobacter spp. with qnr determinants are spreading in Japan.

  15. Characteristics of acute febrile illness and determinants of illness recovery among adults presenting to Singapore primary care clinics

    Directory of Open Access Journals (Sweden)

    Zaw Myo Tun

    2016-10-01

    Full Text Available Abstract Background Undifferentiated acute febrile illness (AFI is a common presentation among adults in primary care settings in Singapore but large gaps exist in the understanding of the characteristics of these patients. We studied clinical and epidemiological characteristics of AFI patients and factors associated with delayed recovery from AFI. Methods We performed a secondary data analysis using data from the Early DENgue infection and outcome (EDEN study on 2046 adult patients presenting at 5 Singapore polyclinics between December 2007 and February 2013 with a history of fever (≥38 °C for less than 72 h. We used an accelerated failure time model to investigate factors associated with delayed recovery from AFI. Results The mean age of patients was 36.6 years, 65 % were male, 51 % were of Chinese ethnicity, and 75 % lived in public housing. Median illness duration was 5 days (interquartile range, 3–7. In multivariable analysis, the unemployed and white collar workers had longer illness duration compared with blue collar workers (time ratio (TR, 1.10; 95 % confidence interval (CI, 1.03–1.17 and TR, 1.08; 95 % CI, 1.02–1.15, respectively. Patients with more symptoms at initial consultation had slower recovery (TR, 1.03 per additional symptom; 95 % CI, 1.02–1.03. Other clinical factors were also associated with longer duration of illness, including use of analgesics (TR, 1.21; 95 % CI, 1.15–1.28; use of cough medicines (TR, 1.14; 95 % CI, 1.08–1.20; use of antibiotics (TR, 1.14; 95 % CI, 1.07–1.21; and hospitalization (TR, 1.59; 95 % CI, 1.39–1.82. Compared to patients with normal WBC count at first consultation, those with low WBC count had slower recovery (TR, 1.14; 95 % CI, 1.07–1.21, while the reverse was observed among patients with high WBC count (TR, 0.94; 95 % CI, 0.88–1.00. Conclusions Differences in illness duration among different types of employment may reflect differences in their underlying

  16. Transfer Matrix Method for the Determination of the Natural Vibration Characteristics of Realistic Thrusting Launch Vehicle—Part I

    Directory of Open Access Journals (Sweden)

    Laith K. Abbas

    2013-01-01

    Full Text Available The feasibility of using the transfer matrix method (TMM to compute the natural vibration characteristics of a flexible rocket/satellite launch vehicle is explored theoretically. In the approach to the problem, a nonuniform free-free Timoshenko and Euler-Bernoulli beamlike structure is modeled. A provision is made to take into consideration the effects of shear deformation and rotary inertia. Large thrust-to-weight ratio leads to large axial accelerations that result in an axial inertia load distribution from nose to tail which causes the development of significant compressive forces along the length of the launch vehicle. Therefore, it is important to take into account this effect in the transverse vibration model. Once the transfer matrix of a single component has been obtained, the product of all component matrices composes the matrix of the entire structure. The frequency equation and mode shape are formulated in terms of the elements of the structural matrices. Flight test and analytical results validate the present TMM formulas.

  17. Determination of physical characteristics, chemical composition and digestion coefficients of treated lemon pulp with Saccharomyces cerevisiae in goat diet.

    Science.gov (United States)

    Dadvar, P; Dayani, O; Mehdipour, M; Morovat, M

    2015-02-01

    The aim of this study was to evaluate the effects of processing of lemon pulp with Saccharomyces cerevisiae on physical properties, chemical composition, digestion coefficients and blood parameters. Eight adult male Raeini goats were used in a 28-day period. The experimental design was a completely randomised design with two treatments and four replicates. The first 21 days were for adaptation, and the last 7 days were for collecting samples. The animals were housed in individual metabolic cages equipped with a urine-faeces separator and were fed with diet containing alfalfa hay (60%) and lemon pulp (40%) at the maintenance level. Collected data were subjected to analysis of completely randomised design. With diet containing processed lemon pulp, functional specific gravity, bulk density, soluble dry matter, percentage of crude protein, neutral detergent fibre (NDF), acid detergent fibre and crude ash were significantly increased and water-holding capacity, insoluble dry matter, insoluble ash percentage of dry matter, organic matter, crude fat, non-fibrous carbohydrates and nitrogen-free extract were significantly decreased (p lemon pulp (p lemon pulp, digestibility of crude protein and NDF was higher (p lemon pulp with S. cerevisiae improved the physical characteristics and increased the percentage of crude protein and the digestion coefficients of protein and NDF. Journal of Animal Physiology and Animal Nutrition © 2014 Blackwell Verlag GmbH.

  18. Determination of electrostatic force and its characteristics based on phase difference by amplitude modulation atomic force microscopy

    Science.gov (United States)

    Wang, Kesheng; Cheng, Jia; Yao, Shiji; Lu, Yijia; Ji, Linhong; Xu, Dengfeng

    2016-12-01

    Electrostatic force measurement at the micro/nano scale is of great significance in science and engineering. In this paper, a reasonable way of applying voltage is put forward by taking an electrostatic chuck in a real integrated circuit manufacturing process as a sample, applying voltage in the probe and the sample electrode, respectively, and comparing the measurement effect of the probe oscillation phase difference by amplitude modulation atomic force microscopy. Based on the phase difference obtained from the experiment, the quantitative dependence of the absolute magnitude of the electrostatic force on the tip-sample distance and applied voltage is established by means of theoretical analysis and numerical simulation. The results show that the varying characteristics of the electrostatic force with the distance and voltage at the micro/nano scale are similar to those at the macroscopic scale. Electrostatic force gradually decays with increasing distance. Electrostatic force is basically proportional to the square of applied voltage. Meanwhile, the applicable conditions of the above laws are discussed. In addition, a comparison of the results in this paper with the results of the energy dissipation method shows the two are consistent in general. The error decreases with increasing distance, and the effect of voltage on the error is small.

  19. Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling

    Directory of Open Access Journals (Sweden)

    J. E. Holloway

    2017-06-01

    Full Text Available Warming of the Arctic in recent years has led to changes in the active layer and uppermost permafrost. In particular, thick active layer formation results in more frequent thaw of the ice-rich transient layer. This addition of moisture, as well as infiltration from late season precipitation, results in high pore-water pressures (PWPs at the base of the active layer and can potentially result in landscape degradation. To predict areas that have the potential for subsurface pressurization, we use susceptibility maps generated using a generalized additive model (GAM. As model response variables, we used active layer detachments (ALDs and mud ejections (MEs, both formed by high PWP conditions at the Cape Bounty Arctic Watershed Observatory, Melville Island, Canada. As explanatory variables, we used the terrain characteristics elevation, slope, distance to water, topographic position index (TPI, potential incoming solar radiation (PISR, distance to water, normalized difference vegetation index (NDVI; ME model only, geology, and topographic wetness index (TWI. ALDs and MEs were accurately modelled in terms of susceptibility to disturbance across the study area. The susceptibility models demonstrate that ALDs are most probable on hill slopes with gradual to steep slopes and relatively low PISR, whereas MEs are associated with higher elevation areas, lower slope angles, and areas relatively far from water. Based on these results, this method identifies areas that may be sensitive to high PWPs and helps improve our understanding of geomorphic sensitivity to permafrost degradation.

  20. Feature determination from powered wheelchair user joystick input characteristics for adapting driving assistance [version 3; referees: 2 approved

    Directory of Open Access Journals (Sweden)

    Michael Gillham

    2018-05-01

    Full Text Available Background: Many powered wheelchair users find their medical condition and their ability to drive the wheelchair will change over time. In order to maintain their independent mobility, the powered chair will require adjustment over time to suit the user's needs, thus regular input from healthcare professionals is required. These limited resources can result in the user having to wait weeks for appointments, resulting in the user losing independent mobility, consequently affecting their quality of life and that of their family and carers. In order to provide an adaptive assistive driving system, a range of features need to be identified which are suitable for initial system setup and can automatically provide data for re-calibration over the long term. Methods: A questionnaire was designed to collect information from powered wheelchair users with regard to their symptoms and how they changed over time. Another group of volunteer participants were asked to drive a test platform and complete a course which represented manoeuvring in a very confined space as quickly as possible. Two of those participants were also monitored over a longer period in their normal home daily environment. Features, thought to be suitable, were examined using pattern recognition classifiers to determine their suitability for identifying the changing user input over time. Results: The results are not designed to provide absolute insight into the individual user behaviour, as no ground truth of their ability has been determined, they do nevertheless demonstrate the utility of the measured features to provide evidence of the users’ changing ability over time whilst driving a powered wheelchair. Conclusions: Determining the driving features and adjustable elements provides the initial step towards developing an adaptable assistive technology for the user when the ground truths of the individual and their machine have been learned by a smart pattern recognition system.

  1. PROCESSING AND ANALYSIS OF DATA OF natural experiment FOR DETERMINING THE tragectory CHARACTERISTICS OF A ROUND PARACHUTE AT HIGH ALTITUDES

    Directory of Open Access Journals (Sweden)

    S. V. Zhurin

    2015-01-01

    Full Text Available The article is devoted to the analysis of the trajectory parameters obtained during the flight experiment at the start of meteo-rocket MMP-06, to determine major parameters of motion of a round parachute at subsonic speeds in the range of altitudes from 0 to 60 km. The Reynolds number is changed in the range from 104 to1,5·106.The main parameters of the trajectory were obtained according to the experimental data. Only laboratory research on a model parachute systems in such a wide range of Reynolds numbers are found in the literature on parachute subjects. This article obtained results of flight experiment.

  2. Determination of 222Rn and its physico-chemical and biological characteristics in aquifers of Toluca valley

    International Nuclear Information System (INIS)

    Hernandez, A.; Aranda, P.; Ceballos, S.; Cruz, D.; Jauregui, B.; Lopez, R.; Pena, P.; Salazar, S.; Segovia, N.; Tamez, E.

    1997-01-01

    In this work it is realized a geochemical study which includes the evaluation of 222 Rn concentration in drinking water wells at Toluca city and a spring water of Almoloya de Juarez municipality at State of mexico. the same is studied about evolution of 222 Rn concentration in water of the hydrating which supply it to those wells. the geochemical evaluation also covers the determination of major and minor elements or trace and the biological analysis of water. The study includes two seasonal cycles, the low water mark one and other the rainy for being able to evaluate the aquifers reloading effects in the water composition. (Author)

  3. Enhancement of gravimetric forced flow through system to determine sorption, swelling, and mass transfer characteristics of liquid sorbents

    Science.gov (United States)

    Dresp, G.; Petermann, M.; Fieback, T. M.

    2018-04-01

    An existing apparatus for forced flow through of liquid sorbents has been enhanced with an optically accessible system including a transparent crucible, high pressure viewing cell, and camera. With this optical system, the active surface area between gas and liquid can be determined in situ for the first time under industrial process conditions while maintaining the accuracy of a magnetic suspension balance. Additionally, occurring swelling and the resulting buoyancy changes can now be corrected, further improving the quality of the data. Validation measurements focusing on the sorption isotherms, swelling, and bubble geometry of 1-butyl-3-methylimidazolium tetrafluoroborate with nitrogen at 303 K and up to 17 MPa, as well as with carbon dioxide at 303 K, 323 K, and 373 K at up to 3.5 MPa were completed. Absorption of nitrogen resulted in no observable volume change, whereas absorption of carbon dioxide resulted in temperature independent swelling of up to 9.8%. The gas bubble's structure and behavior during its ascend through the liquid was optically tracked in situ. Combining these two data sets with the absorption kinetics forms the basis to determine the measuring system independent mass transfer coefficients, which are applicable in other laboratory scale and industrial processes.

  4. Determination And Characteristic Oil Biomarker Of Illegal Crude Oil Production Using Mass Spectroscopy in Musi Banyuasin District

    Directory of Open Access Journals (Sweden)

    Edhi suryanto

    2018-03-01

    Full Text Available South Sumatra is one of the largest petroleum producing provinces in Indonesia, especially in the region of Musi Banyuasin Petroleum resources other than legally cultivated by Pertamina as government representatives, but on the other hand the community also participate through Illegal Drilling activities. This study aims to determine the hydrocarbon content and characterization of petroleum produced illegally by communities in the Sangadesa, Babattoman and Keluang districts through the biomarker analysis of the distribution of n-Alkane C10-C34 (m/z: 57, pristane, phytane, sterane C27-C29 (m/z: 217,218,259 and specific biomarker using Gas Chromatography Mass Spectroscopy agilent GCMSD 6890/5973i with data analysis using MSD Chemstation F.01.01.2317 and Library Database NIST14. Petroleum samples taken from 10 illegal wells with a depth range of 80-250 meters and production period of 3 months until 3 years. Oil is produced through The illegal drilling is not the main oil source rock but the result of migration. Biomarkers Hydrocarbon analysis is one of the most widely used devices for exploration geochemistry, exploitation, production and forensic environment in the assessment and determination of sources of pollution related to petroleum material and derivatives very well.

  5. Socio-demographic characteristics as determinants of quality of life and depression of older people in Serbia

    Directory of Open Access Journals (Sweden)

    Jaredić Biljana N.

    2014-01-01

    Full Text Available Studying the process of aging and old age is an important question in social sciences. The quality of life at this age, among other things, is being enriched with new life opportunities and challenges, as well as developmental tasks every single individual has to face with. Therefore the focus of this research is the correlation of the quality of life and depressiveness with different demographic characteristics of older people in Serbia. The demographic variables included: gender, age, education, marital status and monthly income of the respondents. The quality of life is measured using the Older People's Quality of Life Questionnaire - OPQOL (Bowling, 2009, as well as several questions on life domain satisfaction and chronical disease, while depressiveness was measured using Geriatric Depression Scale - GDS (Greenberg, 2007. The sample was a convenience one, consisted of 497 respondents, 50,35% of men and 49,7% of women, 65-92 years old. The final results show that the quality of life of older people in Serbia is within the average range, and depressiveness belongs to the -category with the level of mild occurence. Men are more satisfied with a job they have or used to have, while women better estimate their independence and control over their life. The age of respondents positively correlates with marital satisfaction, satisfaction with job, with parental role, health, social relations, independence and monthly incomes. The amount of monthly income positively correlates with job satisfaction and well-being, while it is negatively correlated with health, social relations, independence, home and neighbourhood, financial status and the depressiveness of the respondents. The level of education is significantly correlated with marital satisfaction, job, whole life, health, social relations and activities, satisfaction with home and neighbourhood, emotional and psychic well-being, financial status and the level of depressiveness of the respondents

  6. The role of natural vegetative disturbance in determining stream reach characteristics in central Idaho and western Montana

    Science.gov (United States)

    Roper, B.B.; Jarvis, B.; Kershner, J.L.

    2007-01-01

    We evaluated the relationship between natural vegetative disturbance and changes in stream habitat and macroinvertebrate metrics within 33 randomly selected minimally managed watersheds in central Idaho and western Montana. Changes in stream reach conditions were related to vegetative disturbance for the time periods from 1985 to 1993 and 1993 to 2000, respectively, at the following three spatial scales; within the stream buffer and less than 1 km from the evaluated reach, within the watershed and within 1 km of the stream reach, and within the watershed. Data for stream reaches were based on field surveys and vegetative disturbance was generated for the watershed above the sampled reach using remotely sensed data and geographical information systems. Large scale (>100 ha) vegetative disturbance was common within the study area. Even though natural vegetative disturbance rates were high, we found that few of the measured attributes were related to the magnitude of vegetative disturbance. The three physical habitat attributes that changed significantly were sinuosity, median particle size, and percentage of undercut bank; each was related to the disturbance in the earlier (1985-1993) time frame. There was a significant relationship between changes in two macroinvertebrate metrics, abundance and percent collectors/filterers, and the magnitude of disturbance during the more recent time period (1993-2000). We did not find a consistent relationship between the location of the disturbance within the watershed and changes in stream conditions. Our findings suggest that natural vegetative disturbance within the northern Rocky Mountains is complex but likely does not result in substantial short-term changes in the characteristics of most stream reaches. ?? 2007 by the Northwest Scientific Association. All rights reserved.

  7. Using multi spherical spectrometry for determination of dosimetric characteristics of mixed neutron and gamma radiation fields of fission sources

    International Nuclear Information System (INIS)

    Fyulep, M.; Nikodemova, D.; Grabovtsova, A.; Galan, P.; Trousil, J.

    1977-01-01

    Possibilities of the application of multispherical spectrometry in personnel dosimetry of neutrons (n) and gamma radiation (γ) are considered. Studies were made to elucidate a possibility of using albedo dosemeters to increase the sensitivity of personnel dosemeters. Determined were the dose due to the (n,γ) reaction in a human body, absorbed dose and dose equivalent. The effect of (n,γ) dose on the reading of personnel gamma dosemeter was considered. It is shown that the above effect on the dosemeter readings for frontal irradiation by a broad neutron beam in everyday personnel dosimetry near 252 Cf sources may be neglected. Only in the case of strongly slowed-down fission spectrum the effect of the (n,γ) reaction is considerable. The application of albedo dosemeter is expedient to take into account the corrections of personnel dosemeter readings [ru

  8. Determination and Verification of the main Dynamic Characteristics of a Spatially Large Structure Using the Basic Records Combination Method

    Directory of Open Access Journals (Sweden)

    Patricia Murzea

    2013-09-01

    Full Text Available The aim of the paper is to present some methodological aspects regarding the determination of the vibration eigenmodes of a spatially large, symmetric structure and afterwards to show the obtained results for a spectral analysis of the ground motion in the horizontal plane, corresponding to steady state micro-tremors. The recorded velocigrams concern the rigid body motion of the main ring of the structure (translation along different horizontal directions and rotation with respect to the vertical symmetry axis as well as ovalization oscillations (mainly second order ovalization. The necessary data for the analysis was obtained through an efficient technique of combining basic records gathered with the help of data acquisition systems, on site, using three different schemes for the placement of the recording sensors.

  9. Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials

    International Nuclear Information System (INIS)

    Klepikov, V.F.; Prokhorenko, E.M.; Lytvynenko, V.V.; Zakharchenko, A.A.; Nazhmuradov, M.A.

    2016-01-01

    Radiation safety features of polystyrene steel composite materials were found by means of mathematical modeling techniques. We determined the attenuation of the gamma quantum flux passing through a solid protective layer compared with those attenuation for the bulk protective layer. Change of fractional attenuation of the dose absorbed by 10 and 50 mm thick composites is calculated. Dependence between protective properties of composite and its blend composition was studied. Modifications of technical process of composite materials production were performed. Rotation speed of agitator system was found. It was defined that heating time of polystyrene steel mix is longer than heating time of polystyrene tungstic one. Degree of mix heating and integrity of thermic field on its surface was controlled with the help of IR radiometry methods.

  10. Method of and system for determining a spectrum of radiation characteristics with full counting-loss compensation

    International Nuclear Information System (INIS)

    Westphal, G.P.

    1984-01-01

    Real-time correction of counting losses in the operation of a pulse-height analyzer, connected to the output of a radiation detector, is accomplished by establishing a gating interval at a time when the analyzer is available after processing the last detector pulse, this interval beginning at an instant delayed beyond the trailing edge of that last pulse by at least a predetermined rise time and ending with the leading edge of the next detector pulse. Test pulses generated during this gating interval are counted and their number is used to determine a probability ratio whose reciprocal constitutes a weighting factor; the digitized amplitude of each detector pulse addresses a corresponding memory cell whose contents are thereupon increased by the current weighting factor

  11. Determination and comparison of chemical characteristics of Arbutus unedo L. and Arbutus andrachnae L. (family Ericaceae) fruits.

    Science.gov (United States)

    Seker, Murat; Toplu, Celil

    2010-08-01

    The fruits and leaves of Arbutus species are well known in folk medicine as antiseptics, diuretics, and laxatives in many parts of Turkey. Some chemical properties including pH, soluble solid content, titratable acidity, protein, moisture, ash, ascorbic acid, fructose, glucose, sucrose, total phenols, total antioxidant activity, and minerals were determined in fully matured Arbutus unedo L. and Arbutus andrachnae L. fruits collected from different sites of Canakkale, Turkey in 2006 and 2007. Total soluble solids, titratable acidity, protein, moisture, and ash content of A. unedo and A. andrachnae berries were on average 16.0% and 14.0%, 0.4% and 0.6%, 2.38% and 3.77%, 47.21% and 38.21%, and 2.82% and 4.35%, respectively. The mean values of ascorbic acid were 270.50 mg/100 g for A. unedo and 140.30 mg/100 g for A. andrachnae, which suggested that Arbutus berries contain high amounts of vitamin C. In the strawberry tree fruits, fructose and glucose were determined to be the major sugars. The analysis showed that fructose and glucose occurred in concentrations of 24.09% and 19.09%, respectively. However, ripe A. andrachnae fruits contained small amounts of fructose (4.12%), glucose (2.73%), and sucrose (0.16%) detectable by high-performance liquid chromatography analysis. The general order of abundance of the minerals was K > Ca > P > Mg > Na in whole fruit of the strawberry tree. The chemical composition of Arbutus fruits indicates that the fruits are good sources of minerals and ascorbic acid and that they are high in phenolics and antioxidant capacity and low in soluble sugars, especially A. andrachnae. The data should be useful for research purposes and for compiling local food composition tables. In view of its chemical composition, the use of Arbutus fruits in some food products may be suggested.

  12. Note Bibliografiche: Rochon L.-P. e Rossi S. (2017: A Modern Guide to Rethinking Economics; Jo T.-H., Chester L. e D’Ippoliti C. (2017: The Routledge Handbook of Heterodox Economics. Theorizing, Analyzing, and Transforming Capitalism

    Directory of Open Access Journals (Sweden)

    Marcella Corsi

    2017-12-01

    Full Text Available Review of  ROCHON L.-P., ROSSI S. (2017: A Modern Guide to Rethinking Economics; and of Jo T.-H., Chester L., D’Ippoliti C. (2017: The Routledge Handbook of Heterodox Economics. Theorizing, Analyzing, and Transforming Capitalism.

  13. COMPERATIVE ANALYSIS OF ADVERTISED AND NON-ADVERTISED ANALOGICAL PRODUCTS ON THE UKRAINIAN TELEVISION BROADCASTING ON T H E EXAMPLE OF DROTAVERINE AND NOSHPA. MEASURES OF NORMATIVE AND TORTIOUS LAW AND EFFECT ON DECEPTIVE ADVERTISING OF MEDICINES

    Directory of Open Access Journals (Sweden)

    M. S. Ponomarenko

    2015-05-01

    Full Text Available There was experimentally proved that advertise d m edicines, which are analogical on t h e active ph ar maceutical ingredients, are 2-3 times more expensive than non-a dvertise d. The results of the comparative index of the prices are based on the example of Drotaverine (home-produced and imported Drotaverine (Noshpa, France.

  14. ENERGY CHARACTERISTICS OF ETHANOL CHARACTERISTICS ...

    African Journals Online (AJOL)

    eobe

    CHARACTERISTICS OF ETHANOL-DIESEL MIX FOR AUTOMOTIVE. DIESEL ... diesel engine and the engine speed, torque, power and specific fuel consumption (sfc) were determine .... heated on an electric stove and stirred continuously.

  15. TO DETERMINE THE PERSONALITY TRAITS, CLINICAL CHARACTERISTICS AND COGNITIVE FUNCTIONS IN BIPOLAR DISORDER PATIENTS WITH COMORBID ALCOHOL USE DISORDERS

    Directory of Open Access Journals (Sweden)

    Ahalya Thinaharan

    2016-12-01

    Full Text Available BACKGROUND Comorbidity of bipolar disorder and substance use disorder is common. It is difficult to treat bipolar disorder patients with comorbid alcohol use disorder since the disease course is more severe and they have greater difficulties in cognitive functions than those without alcohol use. Whether alcohol negatively affects specific cognitive functions or the deficits are more diffuse in nature is unclear. Alcoholic bipolar patients present with high scores in openness to experience and neuroticism personality traits. Personality to an extent mediates the co-occurrence of substance use in bipolar disorder. Thus, identifying these personality traits in bipolar or substance use disorder patients, will help us to prevent the co-occurrence of the second disorder. The aim of the study is to evaluate the clinical characteristics, personality traits and cognitive functions of patients with bipolar and comorbid alcohol use disorders. MATERIALS AND METHODS A sample of 100 patients, 50 with bipolar and alcohol use disorder (cases and 50 with bipolar disorder (controls attending tertiary care hospital outpatient department at Chennai was selected. Alcohol status was assessed using AUDIT (alcohol use disorder identification test and SADQ (severity of alcohol dependence questionnaire. Personality was assessed using NEO-five factor inventory. Cognition was assessed using frontal lobe assessment battery, Stroop test, DSST (digit symbol substitution test and verbal N back test. RESULTS The cases group had more number of hospitalisations and mixed episodes than control group. They also performed poorer on frontal lobe assessment battery, Stroop test and digit symbol substitution test. Duration of alcohol use was associated positively with total number of hospitalisations and number of episodes. The cases group scored significantly higher on the personality traits of neuroticism and openness to experience. CONCLUSION The study confirmed the higher

  16. Application of LiF for determining the gamma-radiation characteristics of the shut-down reactor

    Energy Technology Data Exchange (ETDEWEB)

    Ibragimova, E M; Musaeva, M A; Ashrapov, U T; Kalanov, M U; Muminov, M I [Inst. of Nuclear Physics, Tashkent (Uzbekistan)

    2005-07-01

    Full text: The power of {sup 60}Co {approx}1.25 MeV gamma-radiation source at the INP AS RUz is limited by 8 Gy/s, which does not satisfy several tasks of material science now. Therefore, we were first to suggest the irradiation of materials with gamma-rays of 0.1-7 MeV, which are emitted by the uranium fission products ({sup 41}Ar, {sup 135}Xe, {sup 125}Xe, {sup 125}I,{sup 137}Cs, {sup 134}Cs, {sup 144}Ce, {sup 95}Zr, {sup 140}Ba, {sup 140}La, {sup 99}Mo, {sup 60}Co) and {sup l6}N, {sup 24}Na, {sup 28}Al radio-nuclides in water during prophylactic shut-downs of our nuclear reactor WWR-SM. The gamma-dose rate kinetics was monitored with the ion current in ionization chambers KNK-53M fixed outside the reactor core from the stop-moment. The current kinetics comprised 4 steps with a high reproducibility at 2 and 0.5 {mu}A, then 50 and 10 nA, each lasting for 1,10, 40 and up to 200 hours, according to the isotope life-times. LiF crystal is known as a thermal luminescence dosimeter of mixed radiations up to 100 Gy. Yet in this work the absorbed gamma-energy dose D{sub {gamma}} was determined by accumulation of the known stable structure defects in thin cleaved LiF crystals: by induced optical absorption and luminescence of F- and M-centers. The samples were irradiated in Al-containers filled with water to keep the temperature of {approx}40 deg. C in the time range from 30 minutes to 150 hours. Optical absorption spectra were registered at spectrometer Specord M-40. Then the induced color center concentration was calculated by the Smakula relation, which is proportional to the absorbed dose D{gamma}. For a better reliability the photoluminescence center content was also determined. Selecting comparable close intensities of the induced absorption and luminescence bands obtained after irradiations of LiF references in the certified {sup 60}Co gamma-sources of the known gamma fluxes 0.7 and 7.5 Gy/s, the gamma-radiation intensity of the shut-down reactor was estimated in

  17. Application of LiF for determining the gamma-radiation characteristics of the shut-down reactor

    International Nuclear Information System (INIS)

    Ibragimova, E.M.; Musaeva, M.A.; Ashrapov, U.T.; Kalanov, M.U.; Muminov, M.I.

    2005-01-01

    Full text: The power of 60 Co ∼1.25 MeV gamma-radiation source at the INP AS RUz is limited by 8 Gy/s, which does not satisfy several tasks of material science now. Therefore, we were first to suggest the irradiation of materials with gamma-rays of 0.1-7 MeV, which are emitted by the uranium fission products ( 41 Ar, 135 Xe, 125 Xe, 125 I, 137 Cs, 134 Cs, 144 Ce, 95 Zr, 140 Ba, 140 La, 99 Mo, 60 Co) and l6 N, 24 Na, 28 Al radio-nuclides in water during prophylactic shut-downs of our nuclear reactor WWR-SM. The gamma-dose rate kinetics was monitored with the ion current in ionization chambers KNK-53M fixed outside the reactor core from the stop-moment. The current kinetics comprised 4 steps with a high reproducibility at 2 and 0.5 μA, then 50 and 10 nA, each lasting for 1,10, 40 and up to 200 hours, according to the isotope life-times. LiF crystal is known as a thermal luminescence dosimeter of mixed radiations up to 100 Gy. Yet in this work the absorbed gamma-energy dose D γ was determined by accumulation of the known stable structure defects in thin cleaved LiF crystals: by induced optical absorption and luminescence of F- and M-centers. The samples were irradiated in Al-containers filled with water to keep the temperature of ∼40 deg. C in the time range from 30 minutes to 150 hours. Optical absorption spectra were registered at spectrometer Specord M-40. Then the induced color center concentration was calculated by the Smakula relation, which is proportional to the absorbed dose Dγ. For a better reliability the photoluminescence center content was also determined. Selecting comparable close intensities of the induced absorption and luminescence bands obtained after irradiations of LiF references in the certified 60 Co gamma-sources of the known gamma fluxes 0.7 and 7.5 Gy/s, the gamma-radiation intensity of the shut-down reactor was estimated in correlation with the ion current as 10 nA = 15 Gy/s. At short times of irradiation the linear dose dependence

  18. Research of rheological characteristics and determination of rational parameters of drying process of activated ferment for bakery products

    Directory of Open Access Journals (Sweden)

    D. M. Borodulin

    2017-01-01

    Full Text Available The work is aimed at investigating the rheological properties of the ferment in the process of maturation and storage with subsequent determination of the rational parameters of its drying in various drying plants with the analysing of microflora of dried samples. We studied the rheological properties of the ferment using the strain of the lactobacilli L. Acidothilus 146A (activator and without it, which showed that the ferment for the production of special purpose bakery products to non-Newtonian or anomalously viscous liquids described by the Osthald-de-Vale rheological equation. We found that the introduction the strain of the lactobacilli L. Acidothilus 146A helps to reduce the viscosity during maturation by almost 3 times, and when storing the samples – in 2 times, this is indicated by the value of the consistency coefficient. The activator reduces the influence of temperature, so the structure of the ferment becomes more stable. It is easier to further process in this state. Consequently, the energy consumption for production is significantly reduced and the increases expiration date after the strain of the lactobacilli L. Acidothilus 146A is added to the starter for the production of special purpose bakery products. We detected kinetic patterns of drying of the activated ferment in thermoradiation, convective and sublimation dryers under different temperature operating conditions. We have determined the rational parameters of drying the ferment for the production of bakery products of specialized purpose. We analyzed the useful microflora of the dried samples. It has been revealed that microorganisms undergoing convective and sublimation (freeze drying are subjected to the smallest destructive effect. We found that microorganisms are less destroyed by convective and freeze drying. The microbial titer in these samples is at least 1(105CFU/g. While drying by the method of infrared irradiation, this titer is lower by a factor of ten

  19. Diffusion of subsidized ACTs in accredited drug shops in Tanzania: determinants of stocking and characteristics of early and late adopters.

    Science.gov (United States)

    Larson, Peter S; Yadav, Prashant; Alphs, Sarah; Arkedis, Jean; Massaga, Julius; Sabot, Oliver; Cohen, Jessica L

    2013-12-18

    Many households in sub-Saharan Africa utilize the private sector as a primary source of treatment for malaria episodes. Expanding access to effective treatment in private drug shops may help reduce incidence of severe disease and mortality. This research leveraged a longitudinal survey of stocking of subsidized artemisinin combination therapies (ACTs), an effective anti-malarial, in Accredited Drug Dispensing Outlets (ADDOs) in two regions of Tanzania. This provided a unique opportunity to explore shop and market level determinants of product diffusion in a developing country retail market. 356 ADDOs in the Rukwa and Mtwara regions of Tanzania were surveyed at seven points between Feb 2011 and May 2012. Shop level audits were used to measure the availability of subsidized ACTs at each shop. Data on market and shop level factors were collected during the survey and also extracted from GIS layers. Regression and network based methodologies were used. Shops classified as early and late adopters, following Rogers' model of product diffusion, were compared. The Bass model of product diffusion was applied to determine whether shops stocked ACTs out of a need to imitate market competitors or a desire to satisfy customer needs. Following the introduction of a subsidy for ACTs, stocking increased from 12% to nearly 80% over the seven survey rounds. Stocking was influenced by higher numbers of proximal shops and clinics, larger customer traffic and the presence of a licensed pharmacist. Early adopters were characterized by a larger percentage of customers seeking care for malaria, a larger catchment and sourcing from specific wholesalers/suppliers. The Bass model of product diffusion indicated that shops were adopting products in response to competitor behavior, rather than customer demand. Decisions to stock new pharmaceutical products in Tanzanian ADDOs are influenced by a combination of factors related to both market competition and customer demand, but are particularly

  20. Determining optical and radiation characteristics of cathode ray tubes' glass to be reused as radiation shielding glass

    Science.gov (United States)

    Zughbi, A.; Kharita, M. H.; Shehada, A. M.

    2017-07-01

    A new method of recycling glass of Cathode Ray Tubes (CRTs) has been presented in this paper. The glass from CRTs suggested being used as raw materials for the production of radiation shielding glass. Cathode ray tubes glass contains considerable amounts of environmentally hazardous toxic wastes, namely heavy metal oxides such as lead oxide (PbO). This method makes CRTs glass a favorable choice to be used as raw material for Radiation Shielding Glass and concrete. The heavy metal oxides increase its density, which make this type of glass nearly equivalent to commercially available shielding glass. CRTs glass have been characterized to determine heavy oxides content, density, refractive index, and radiation shielding properties for different Gamma-Ray energies. Empirical methods have been used by using the Gamma-Ray source cobalt-60 and computational method by using the code XCOM. Measured and calculated values were in a good compatibility. The effects of irradiation by gamma rays of cobalt-60 on the optical transparency for each part of the CRTs glass have been studied. The Results had shown that some parts of CRTs glass have more resistant to Gamma radiation than others. The study had shown that the glass of cathode ray tubes could be recycled to be used as radiation shielding glass. This proposed use of CRT glass is only limited to the available quantity of CRT world-wide.

  1. Manifestation of π-contacts in magnetic field dependence of I-V characteristics for proximity-type 2D Josephson junction array

    International Nuclear Information System (INIS)

    Rivera, V.A.G.; Sergeenkov, S.; Marega, E.; Araujo-Moreira, F.M.

    2009-01-01

    Results on the temperature and magnetic field dependence of current-voltage characteristics (CVC) are presented for SNS-type 2D ordered array of Nb-Cu 0.95 Al 0.05 -Nb junctions. The critical current I C (T,H) and the power exponent a(T,H)=1+Φ 0 I C (T,H)/2k B T of the nonlinear CVC law V=R[I-I C (T,H)] a(T,H) are found to have a maximum at non-zero value of applied magnetic field H p =225 Oe, which is attributed to manifestation of π-type Josephson contacts in our sample.

  2. Physical activity of adult residents of Katowice and selected determinants of their occupational status and socio-economic characteristics

    Directory of Open Access Journals (Sweden)

    Daniel Puciato

    2013-10-01

    Full Text Available Background: The issue of physical activity (PA is often addressed in the literature, but its socio-economic determinants are not fully recognized. To date no studies of the adult population of Katowice have been carried out. Research in this area is of great importance in the context of the documented influence of PA on health and extension of retirement age in Poland. The aim of this paper is to evaluate the relationship between PA and socio-economic status of adult residents of Katowice. Materials and Methods: The study carried out in 2010 comprised 2053 people (987 women and 1066 men aged 30-65 years. To evaluate PA in the study group the diagnostic survey method and a research tool in the form of an abridged version of the International Physical Activity Questionnaire (IPAQ, with specification expanded by the authors, were used. In the statistical analysis logistic regression was employed. Results: The likelihood of meeting the standards of health-enhancing PA was higher in men than in women, and it decreased with age and education level of the respondents. The highest proportion of those meeting the recommendation of health-enhancing PA was observed among blue-collar workers, operators, teachers, police and soldiers. The lowest probability of meeting the recommendations of the American College of Sports Medicine was found among economists and lawyers, office workers, the unemployed, managers, and engineers, pensioners and health care professionals. Conclusions: The study demonstrates the correlation between PA and socio-economic status of the respondents. The analysis of the results indicates the necessity to promote PA programs mainly among women, the elderly, the unemployed, pensioners and representatives of professions, such as economists, lawyers, managers, engineers, and health professionals. Med Pr 2013;64(5:649–657

  3. Pyrolysis characteristics and kinetic parameters determination of biomass fuel powders by differential thermal gravimetric analysis (TGA/DTG)

    International Nuclear Information System (INIS)

    El-Sayed, Saad A.; Mostafa, M.E.

    2014-01-01

    Highlights: • The sugarcane bagasse powder has better energy value compared to the cotton stalks. • Bagasse moisture is entrained in its cell walls and its evaporation needs more energy. • The cotton stalks is more reactive and readily combustible than the bagasse powders. • A lower E and A 0 has been found for bagasse compared with cotton stalks powders. • Calculated E of bagasse and cotton stalks by direct and integral methods are different. - Abstract: The kinetics of the thermal decomposition of the two biomass materials (sugarcane bagasse and cotton stalks powders) were evaluated using a differential thermo-gravimetric analyzer under a non-isothermal condition. Two distinct reaction zones were observed for the two biomasses. The direct Arrhenius plot method and the integral method were applied for determination of kinetic parameters: activation energy, pre-exponential factor, and order of reaction. The weight loss curve showed that pyrolysis of sugarcane bagasse and cotton stalks took place mainly in the range of 200–500 °C. The activation energy of the sugarcane bagasse powder obtained by the direct Arrhenius plot method ranged between 43 and 53.5 kJ/mol. On the other side, the integral method shows larger values of activation energy (77–87.7 kJ/mol). The activation energy of the cotton stalks powder obtained by the direct Arrhenius plot method was ranged between 98.5 and 100.2 kJ/mol, but the integral method shows larger values of activation energy (72.5–127.8 kJ/mol)

  4. Determining optical and radiation characteristics of cathode ray tubes' glass to be reused as radiation shielding glass

    International Nuclear Information System (INIS)

    Zughbi, A.; Kharita, M.H.; Shehada, A.M.

    2017-01-01

    A new method of recycling glass of Cathode Ray Tubes (CRTs) has been presented in this paper. The glass from CRTs suggested being used as raw materials for the production of radiation shielding glass. Cathode ray tubes glass contains considerable amounts of environmentally hazardous toxic wastes, namely heavy metal oxides such as lead oxide (PbO). This method makes CRTs glass a favorable choice to be used as raw material for Radiation Shielding Glass and concrete. The heavy metal oxides increase its density, which make this type of glass nearly equivalent to commercially available shielding glass. CRTs glass have been characterized to determine heavy oxides content, density, refractive index, and radiation shielding properties for different Gamma-Ray energies. Empirical methods have been used by using the Gamma-Ray source cobalt-60 and computational method by using the code XCOM. Measured and calculated values were in a good compatibility. The effects of irradiation by gamma rays of cobalt-60 on the optical transparency for each part of the CRTs glass have been studied. The Results had shown that some parts of CRTs glass have more resistant to Gamma radiation than others. The study had shown that the glass of cathode ray tubes could be recycled to be used as radiation shielding glass. This proposed use of CRT glass is only limited to the available quantity of CRT world-wide. - Highlights: • A new method of recycling glass of Cathode Ray Tubes (CRTs) has been presented. • The glass from CRTs used as raw materials for radiation shielding glass. • The resulted glass have good optical properties and stability against radiations.

  5. Characteristics of the Fiber Laser Sensor System Based on Etched-Bragg Grating Sensing Probe for Determination of the Low Nitrate Concentration in Water.

    Science.gov (United States)

    Pham, Thanh Binh; Bui, Huy; Le, Huu Thang; Pham, Van Hoi

    2016-12-22

    The necessity of environmental protection has stimulated the development of many kinds of methods allowing the determination of different pollutants in the natural environment, including methods for determining nitrate in source water. In this paper, the characteristics of an etched fiber Bragg grating (e-FBG) sensing probe-which integrated in fiber laser structure-are studied by numerical simulation and experiment. The proposed sensor is demonstrated for determination of the low nitrate concentration in a water environment. Experimental results show that this sensor could determine nitrate in water samples at a low concentration range of 0-80 ppm with good repeatability, rapid response, and average sensitivity of 3.5 × 10 -3 nm/ppm with the detection limit of 3 ppm. The e-FBG sensing probe integrated in fiber laser demonstrates many advantages, such as a high resolution for wavelength shift identification, high optical signal-to-noise ratio (OSNR of 40 dB), narrow bandwidth of 0.02 nm that enhanced accuracy and precision of wavelength peak measurement, and capability for optical remote sensing. The obtained results suggested that the proposed e-FBG sensor has a large potential for the determination of low nitrate concentrations in water in outdoor field work.

  6. Characteristics of the Fiber Laser Sensor System Based on Etched-Bragg Grating Sensing Probe for Determination of the Low Nitrate Concentration in Water

    Directory of Open Access Journals (Sweden)

    Thanh Binh Pham

    2016-12-01

    Full Text Available The necessity of environmental protection has stimulated the development of many kinds of methods allowing the determination of different pollutants in the natural environment, including methods for determining nitrate in source water. In this paper, the characteristics of an etched fiber Bragg grating (e-FBG sensing probe—which integrated in fiber laser structure—are studied by numerical simulation and experiment. The proposed sensor is demonstrated for determination of the low nitrate concentration in a water environment. Experimental results show that this sensor could determine nitrate in water samples at a low concentration range of 0–80 ppm with good repeatability, rapid response, and average sensitivity of 3.5 × 10−3 nm/ppm with the detection limit of 3 ppm. The e-FBG sensing probe integrated in fiber laser demonstrates many advantages, such as a high resolution for wavelength shift identification, high optical signal-to-noise ratio (OSNR of 40 dB, narrow bandwidth of 0.02 nm that enhanced accuracy and precision of wavelength peak measurement, and capability for optical remote sensing. The obtained results suggested that the proposed e-FBG sensor has a large potential for the determination of low nitrate concentrations in water in outdoor field work.

  7. Determination of bulk and interface density of states in metal oxide semiconductor thin-film transistors by using capacitance-voltage characteristics

    Science.gov (United States)

    Wei, Xixiong; Deng, Wanling; Fang, Jielin; Ma, Xiaoyu; Huang, Junkai

    2017-10-01

    A physical-based straightforward extraction technique for interface and bulk density of states in metal oxide semiconductor thin film transistors (TFTs) is proposed by using the capacitance-voltage (C-V) characteristics. The interface trap density distribution with energy has been extracted from the analysis of capacitance-voltage characteristics. Using the obtained interface state distribution, the bulk trap density has been determined. With this method, for the interface trap density, it is found that deep state density nearing the mid-gap is approximately constant and tail states density increases exponentially with energy; for the bulk trap density, it is a superposition of exponential deep states and exponential tail states. The validity of the extraction is verified by comparisons with the measured current-voltage (I-V) characteristics and the simulation results by the technology computer-aided design (TCAD) model. This extraction method uses non-numerical iteration which is simple, fast and accurate. Therefore, it is very useful for TFT device characterization.

  8. Predictions of outcomes of renal stones after extracorporeal shock wave lithotripsy from stone characteristics determined by unenhanced helical computed tomography: a multivariate analysis

    International Nuclear Information System (INIS)

    Wang, Li-Jen; Wong, Yon-Cheong; Chuang, Cheng-Keng; Chu, Sheng-Hsien; Chen, Chih-Shou; Chiang, Yang-Jen; See, Lai-Chu

    2005-01-01

    The aim of our study is to analyze the relationships between the characteristics of renal stones determined by unenhanced helical computed tomography (UHCT) and their outcomes after extracorporeal shock wave lithotripsy (ESWL) as well as to predict ESWL outcomes of renal stones by their UHCT characteristics with the use of multivariate analysis. During a 7-month period, 80 adult patients with renal stones underwent ESWL as well as UHCT both before and 3 months after ESWL. Of the 80 patients, 42 patients were classified as ESWL successes and 38 as ESWL failures based on their post-ESWL UHCT findings. For pre-ESWL UHCT, a stone number of more than 2 (P=0.0236), a maximal stone size of greater than 12 mm (P 3 (P 3 (P=0.0003), the presence of nonround/oval stones (P=0.0072) and a maximal stone density of more than 900 HU (P=0.0430) were statistically significant predictors of a failure outcome for ESWL. Thus, the analysis of stone characteristics of renal stones by UHCT is helpful in selecting appropriate patients undergoing ESWL for favorable outcomes and reduces the overall costs of the treatment of renal stones. (orig.)

  9. Characteristics and determinants of adult patients with acute poisoning attending the accident and emergency department of a teaching hospital in Qatar.

    Science.gov (United States)

    Khudair, I F; Jassim, Z; Hanssens, Y; Alsaad, W A

    2013-09-01

    Data about etiologic and demographic characteristics of acute poisoning in adults in Qatar are lacking. This prospective observational study was undertaken to analyze characteristics and possible determinants of acute poisoning in adults in Qatar. During 2010, 18,073 patients attended the emergency department of Hamad General Hospital, a teaching hospital in Qatar. Out of them, 599 (3.3%) patients were diagnosed as "poisoning case" with either chemical or pharmaceutical substances. The prevalence rate of poisoning incidence was 35.3/100,000 population. Seven patients died, corresponding with a case-fatality rate of 0.39/1000. The majority were male (65%) and the mean age was 34 years. The poisons involved were mainly chemicals (61.6%) and pharmaceuticals (38.4%). Female, mainly single, suffered more intentional poisoning compared to male. Of the patients aged 60 years and above (7.2%), the majority (95.3%) suffered unintentional poisoning with pharmaceuticals; 56% with warfarin, 12% with digoxin and 7% with insulin. Multivariate analysis shows that female gender, single status, younger than 35 years of age, being poisoned by pharmaceutical products, and the need for hospitalization are significant determinants for acute intentional poisoning after adjusting all other possible covariates. The findings of this study can be used to establish awareness and prophylactic campaigns in Qatar.

  10. Identification of linearized bearing characteristics of a rotating shaft from experimental synchronous forced responses. Application to the determination of unbalance change

    International Nuclear Information System (INIS)

    Audebert, S.

    1996-03-01

    The monitoring of vibrations evolution of a rotating shaft is necessary for the early detection of a possible default. The recent investigations to improve the monitoring are now in a way which is both associating modeling and experimentation. The aim is to obtain mathematical models of rotors mounted on hydrodynamic bearings, which constitute a good initial representation of real rotating shafts, and permit identification of particular type of default. The feasibility of determining unbalances default, from synchronous responses of a rotating shaft located only at bearings stations, is investigated in two steps: first, motion of rotor journals relatively to two known unbalance excitations is used for linearized bearing characteristics determination; second, localisation and identification of unbalance change can be made, providing that measurements before and after the change has taken place are available. The method is tested on a two-bearing rotor system, added with a mass: randomly disturbed flexural displacements of rotor journals, characterised by four noise levels (0%, 5%, 10%, 15%), are successively considered in order to test the robustness of the method. The stiffness and damping identified characteristics are permitting a correct representation of the dynamic behaviour of the rotating shaft, even relatively to unbalance configurations not used for identification (MAC criterion is greater than 0.98 with 15% noise - disturbed data). Whatever the noise level considered, the localisation of the plane where the unbalance vector is supposed to be applied is correct. (author). 3 refs., 1 fig., 3 tabs

  11. DEVELOPMENT OF CONCEPT OF HARDWARE-SOFTWARE COMPLEX OF MODULAR DESIGN FOR DETERMINATION OF ANTENNA SYSTEMS׳ CHARACTERISTICS BASED ON MEASUREMENTS IN THE NEAR FIELD

    Directory of Open Access Journals (Sweden)

    A. G. Buday

    2017-01-01

    Full Text Available Measuring the amplitude-phase distribution of the radiation field of complex antenna systems on a certain surface close to the radiating aperture allows solving the problem of reconstructing the free-space diagram in the far field and also helps in determining the influence of various structural elements and defects of radiating surfaces on formation of directional diagram. The purpose of this work was to develop a universal hardware-software complex of a modular design aimed for determining the characteristics of wide range of antenna systems in respect of measurements of the amplitude-phase distribution of the radiation field in the near zone.The equations that connect the structure of radiation fields of the antenna system at various distances from it in planar, cylindrical and spherical coordinate systems as well as structural diagrams of the hardware part of measuring complexes have been analyzed.As a result, the concept of constructing a universal hardware-software complex for measuring the radiation field of various types of antenna systems with any type of measurement surface for solving a wide range of applied problems has been developed. A modular structure of hardware and software has been proposed; it allows reconfiguring the complex rapidly in order to measure the characteristics of any particular antenna system at all stages of product development and testing, and also makes the complex economically accessible even for small enterprises and organizations.

  12. Hovering and Low-Speed Performance and Control Characteristics of the Kaman Helicopter Rotor System as Determined on the Langley Helicopter Tower. TED No. NACA DE 205

    Science.gov (United States)

    Carpenter, Paul J.; Paulnock, Russell S.

    1949-01-01

    An investigation has been conducted with the Langley helicopter tower to obtain basic performance and control characteristics of the Raman rotor system. Blade-pitch control is obtained in this configuration by utilizing an auxiliary flap to twist the blades. Rotor thrust and power required were measured for the hovering condition and over a range of wind velocities from 0 to 30 miles per hour. The control characteristics and the transient response of the rotor to various control movements were also measured. The hovering-performance data are presented as a survey of the wake velocities and the variation of torque coefficient with thrust coefficient. The power required for the test rotor to hover at a thrust of 1350 pounds and a rotor speed of 240 rpm is approximately 6.5 percent greater than that estimated for a conventional rotor of the same diameter and solidity. It is believed that most of this difference is caused by th e flap servomechanism. The reduction in total power required for sustentation of the single-rotor configuration tested at various wind velocities and at the normal operating rotor thrust was found to be similar to the theoretical and experimental results for ro tors with conventionally actuated pitch. The control effectiveness was determined as a function of rotor speed. Sufficient control was available to give a thrust range of 0 to 1500 pounds and a rotor tilt of plus or minus 7 degrees. The time lag between flap motion and blade-pitch response is approximately 0.02 to 0.03 second. The response of the rotor following the blade-pitch response is similar to that of a rotor with conventionally actuated pitch changes. The over-all characteristics of the rotor investigated indicate that satisfactory performance and control characteristics were obtained.

  13. Predictions of outcomes of renal stones after extracorporeal shock wave lithotripsy from stone characteristics determined by unenhanced helical computed tomography: a multivariate analysis

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Li-Jen; Wong, Yon-Cheong [Chang Gung University, Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Taipei (Taiwan); Chuang, Cheng-Keng; Chu, Sheng-Hsien; Chen, Chih-Shou; Chiang, Yang-Jen [Chang Gung University, Department of Urology, Chang Gung Memorial Hospital, Taipei (Taiwan); See, Lai-Chu [Chang Gung University, Department of Biostatistics Center, Chang Gung Memorial Hospital, Taipei (Taiwan)

    2005-11-01

    The aim of our study is to analyze the relationships between the characteristics of renal stones determined by unenhanced helical computed tomography (UHCT) and their outcomes after extracorporeal shock wave lithotripsy (ESWL) as well as to predict ESWL outcomes of renal stones by their UHCT characteristics with the use of multivariate analysis. During a 7-month period, 80 adult patients with renal stones underwent ESWL as well as UHCT both before and 3 months after ESWL. Of the 80 patients, 42 patients were classified as ESWL successes and 38 as ESWL failures based on their post-ESWL UHCT findings. For pre-ESWL UHCT, a stone number of more than 2 (P=0.0236), a maximal stone size of greater than 12 mm (P<0.0001), a stone burden of more than 700 mm{sup 3} (P<0.0001), a maximal stone density of more than 900 HU (P=0.0008) and nonround/oval stones (P=0.0007) were associated with ESWL failure outcomes. Multivariate analysis demonstrated that a stone burden of more than 700 mm{sup 3} (P=0.0003), the presence of nonround/oval stones (P=0.0072) and a maximal stone density of more than 900 HU (P=0.0430) were statistically significant predictors of a failure outcome for ESWL. Thus, the analysis of stone characteristics of renal stones by UHCT is helpful in selecting appropriate patients undergoing ESWL for favorable outcomes and reduces the overall costs of the treatment of renal stones. (orig.)

  14. Perceived risks in online hotel services acquisition: Determinant factors of reduction strategies and their relation with consumer´s demographical characteristics

    Directory of Open Access Journals (Sweden)

    Anderson Gomes de Souza

    2012-09-01

    Full Text Available The purpose of this article was to identify which factors determine the adoption of strategies to reduce perceived risk in the purchase of hotel services online, checking whether there is any relation between those relievers and demographical characteristics. A factor analysis was conducted after application of a structured questionnaire with consumers who have a habit of traveling and booking hotels through the internet. The results showed that the factors that characterize the strategies used by consumers as a means of reducing risk in the virtual environment are: users and partners own experience, regulation guarantees and certainty and higher price. That is, it can be considered that these factors are relevant and tend to be used by consumers as a way to reduce risks when purchasing a hotel service online. On the other hand, it was found that demographic characteristics show no relationship with consumers´ perception of risk. With these results, the question that remains is whether the companies in this field of activity develop actions aligned with these factors in order to enable consumers to reduce their risk perceptions while buying these services on websites.

  15. A study on the determination of the morphological, yield and quality characteristics of some sainfoin species (onobrychis spp.) native to east anatolia

    International Nuclear Information System (INIS)

    Okcu, M.; Sengul, S.

    2014-01-01

    Objective of the present study is to identify the species belonging to the genus Onobrychis (Fabaceae) growing native in and around Erzurum, and to determine their overall prevalence and morphological and quality characteristics. Species samples were collected from different locations in flowering periods of 2007, 2008 and 2009. At the end of the study, totally 10 genotypes were found representing 8 species and 2 sub-species. It was found that leaf length and leaflet frequency were the largest in O. atropatana var. grandiflora, the number of leaflets was the highest in O. viciifolia, the length and width of leaflets were maximum in O. radiata, the number of main branches and the number of fascicles in main branches were in O. hajastana, crude ash rate was highest in O. stenostachya, plant fresh and dry weight, ADF and NDF rate were highest in O. cornuta, where as crude protein rate was slightly higher in O. stenostachya subsp. sosnowskyi than other taxa. (author)

  16. Influence of ``short`` cracks on fracture mechanics material characteristics - methods of determination and their effects; Einfluss ``kurzer`` Risse auf die bruchmechanischen Werkstoffkennwerte - Bestimmungsmethoden und ihre Auswirkungen

    Energy Technology Data Exchange (ETDEWEB)

    Roos, E.; Silcher, H.; Eisele, U. [Stuttgart Univ. (Germany). Staatliche Materialpruefungsanstalt

    1998-11-01

    The methods applicable to determining fracture mechanics characteristics of the threshold toughness, published in various recommendations and draft standards, are compared and evaluated. The methods are put to the test and comparatively analysed using compact tensile specimens (CT), standardized three-point bending specimens (TPB), and TPB specimens with short cracks. It is shown that only the physical crack initiation value J{sub i} yields results that can be applied for comparative evaluations. (orig./CB) [Deutsch] Die fuer das Uebergangsgebiet der Zaehigkeit in verschiedenen Pruefempfehlungen und Normvorschlaegen veroeffentlichten Verfahren zur Bestimmung bruchmechanischer Kennwerte werden gegenuebergestellt und bewertet. Anhand von Kompaktzugproben (CT), Standard Drei-Punkt-Biegeproben (TPB) und TPB-Proben mit kurzen Rissen werden diese Verfahren angewandt und die Ergebnisse verglichen. Es zeigt sich, dass nur der physikalische Risseinleitungswert J{sub i} fuer alle untersuchten Probenformen vergleichbare und uebertragbare Ergebnisse liefert. (orig.)

  17. PROCESSING AND ANALYSIS OF Fligh experiment DATA FOR DETERMINING THE CHARACTERISTICS OF THE MOTION OF A ROUND PARACHUTE on a spiral trajectory AT HIGH ALTITUDES

    Directory of Open Access Journals (Sweden)

    S. V. Zhurin

    2015-01-01

    Full Text Available The article is addressed to the analysis of the trajectory parameters and videos obtained during the flight experiment at the launch of meteo-rocket MMP-06 with the purpose to determine major parameters of motion of a round parachute at subsonic speeds in the range of altitudes from 0 to 40 km. The data analysis showed that the trajectory of the parachute represents spiral "stretched" by the wind in the horizontal direction and disturbed by random factors of a non-stationary flow around the parachute. The main parameters of the trajectory are obtained according to the experimental data. Only qualitative analysis of spiral motion paths for round parachutes may be found in the publications on parachute subjects. This article presents the quantitative characteristics of this process.

  18. Determination of the hole effective mass in thin silicon dioxide film by means of an analysis of characteristics of a MOS tunnel emitter transistor

    International Nuclear Information System (INIS)

    Vexler, M I; Tyaginov, S E; Shulekin, A F

    2005-01-01

    The value of m h = 0.33 m 0 has been experimentally obtained for hole effective mass in a tunnel-thin (2-3 nm) SiO 2 film. The use of this value ensures the adequate modelling of a direct-tunnelling hole current in MOS devices. For the first time, in order to determine m h , the characteristics of a MOS tunnel emitter transistor have been mathematically processed, that allows for the precise estimation of the effective oxide thickness, as the electron effective mass in SiO 2 is independently known from the literature. The formulae for simulation of currents in a tunnel MOS structure are listed along with the necessary parameter values

  19. Comparisons of fission track age-determination and radioactivation analysis among radiation fields. Characteristic values for pneumatic tube, JRR-3M PN2

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Tatsuro [Kagoshima Univ. (Japan). Faculty of Education; Tomura, Kenji

    1996-01-01

    It is necessary for Fission track age determination and radioactivation analysis to define the energy spectrum of a reactor neutron as the basis for calculating the nuclear reaction rate. This study was made aiming to define the spectrum for PN2 pneumatic tube of No. 3 plant of Japan Atomic Energy Research Institute (JAERI). Characteristics such as conventional flux, cross reaction, neutron temperature and integral fast flux were examined for 3 facilities; JRR-2, JRR-4 and JRR-3M. And the neutron spectrum for each facility was estimated based on the assumptions; Maxwell distribution for thermal neutrons, 1/E for intermediate neutrons and Watt`s formula for fast neutrons. The present results showed that the spectrum for JRR-3M, PN2 was discontinuous in the range from the intermediate to the fast neutron, whereas those for other facilities were found considerably improved. (M.N.)

  20. Comparative characteristics of shoulder blade (Scapula and shoulder bone (Humerus of roe deer (Capreolus capreolus and sheep (Ovis aries in order to determine the animal species

    Directory of Open Access Journals (Sweden)

    Blagojević Miloš

    2016-01-01

    Full Text Available In illegal hunting it is often possible only on the basis of morphological characteristics to determine the animal species. By the method of comparison there was performed the forensic analysis of roe deer and sheep osteological features. For the purpose of investigating the shoulder blade (Scapula and shoulder bone (Humerus comparative characteristics, there were used 6 shoulder blades and 6 shoulder bones of roe deer and 8 shoulder blades and 8 shoulder bones of sheep. After the skin, muscles, arterial, venous and lymphatic vessels as well as nerves were removed from the bones, they were thermally treated in an autoclave. Subsequently, the bones were placed in 3% solutioin of hydrogen peroxide (H2O2 for bleaching and degreasing. Then they were air dried and then photographed. Shoulder blade (Scapula is a bone plate (Ossa plana roughly triangular in shape. Scapular spine (Spina scapulae is much more prominent in roe deer with acromion blade in the form of spike, while in sheep it is shorter and ends with acrimion at a right angle. Shoulder blade cup (Cavitas glenoidalis in roe deer is round in shape, and in sheep it is oval. Tuberculum supraglenoidale and Processus coracoideus in sheep are more and in roe deer less developed. Shoulder bone (Humerus in roe deer is relatively long, slender bone with proximal convexity turned cranially in regard to the same bone in sheep, which is stronger and heavier. Tuberculum majus in roe deer is less developed, and in sheep it is in a form of solid bone protuberance. Tuberculum minus and Tuberositas deltoidea in sheep are more developed than in roe deer. At medial condyle (Condylus medialis in sheep there is shallow and wide groove, while in roe deer it is deeper and narrower. On the basis of morphological differences of roe deer and sheep bones, it can be determined with certainty which animal spesies they belong to.

  1. CHARACTERISTICS OF METABOLISM AND WORKING OUT THE METHODS OF DETERMINATION OF SYNTHETIC CANNABINOID THJ-2201 IN THE URINE OF LABORATORY ANIMALS

    Directory of Open Access Journals (Sweden)

    D. Yu. Apushkin

    2017-01-01

    Full Text Available The proposed article touches upon the study of metabolism of new synthetic cannabinoids. In the work the data on synthetic cannabinoid 3-(Naftalin-1-yloxomethyl-1-(5-fluoropentyl-1H-indazole (THJ-2201, as well as the products of its metabolism in the laboratory rats of the Wistar line are given, i. e. Mass spectra and chromatograms of the native substance (THJ-2201 obtained by high-performance liquid chromatography with mass-selective detection (HPLC-MS and gas chromatography with mass-selective detection (GC-MS are given. The paper presents a complex technique for qualitative determination of cannabimimetics THJ-2201 and methods for obtaining a metabolic profile model for the test substance that can be useful for the tasks of qualitative detection and detection of new psychoactive substances in biological objects for the purposes of forensic analysis.The aim of this work was to develop methods for determination of the test substance (THJ-2201 and its metabolites in the urine of laboratory animals, as well as the study of the metabolic characteristics of synthetic cannabinoids on the whole.Materials and methods. The following equipment was used for the experiment: a liquid chromatograph from the firm “Shimadzu LCMC-8050” in combination with a mass-selective detector. The detector type is a triple quadrupole with a double ionization source (chemical ionization at atmospheric pressure and electrospray. The separation of the substances occurred in a chromatographic column (the material is stainless steel, the characteristics are: 150 * 3.0 mm, Luna 3uC18 (2, 100A. The Sorbent is reversed-phase. The investigations were carried out on Agilent 7890A gas chromatograph with Agilent 5975C mass spectrometer and a 103 polar HP-5ms column of 28 m × 0.25 mm. The animals were mature male white laboratory rats of the Wistar line, aged 4–6 months, weighing 190-230 grams.Results and discussion. As a result of the studies, a comprehensive methodology for

  2. Regional Relations in Bankfull Channel Characteristics determined from flow measurements at selected stream-gaging stations in West Virginia, 1911-2002

    Science.gov (United States)

    Messinger, Terence; Wiley, Jeffrey B.

    2004-01-01

    Three bankfull channel characteristics?cross-sectional area, width, and depth?were significantly correlated with drainage area in regression equations developed for two regions in West Virginia. Channel characteristics were determined from analysis of flow measurements made at 74 U.S. Geological Survey stream-gaging stations at flows between 0.5 and 5.0 times bankfull flow between 1911 and 2002. Graphical and regression analysis were used to delineate an 'Eastern Region' and a 'Western Region,' which were separated by the boundary between the Appalachian Plateaus and Valley and Ridge Physiographic Provinces. Streams that drained parts of both provinces had channel characteristics typical of the Eastern Region, and were grouped with it. Standard error for the six regression equations, three for each region, ranged between 8.7 and 16 percent. Cross-sectional area and depth were greater relative to drainage area for the Western Region than they were for the Eastern Region. Regression equations were defined for streams draining between 46.5 and 1,619 square miles for the Eastern Region, and between 2.78 and 1,354 square miles for the Western Region. Stream-gaging stations with two or more cross sections where flow had been measured at flows between 0.5 and 5.0 times the 1.5-year flow showed poor replication of channel characteristics compared to the 95-percent confidence intervals of the regression, suggesting that within-reach variability for the stream-gaging stations may be substantial. A disproportionate number of the selected stream-gaging stations were on large (drainage area greater than 100 square miles) streams in the central highlands of West Virginia, and only one stream-gaging station that met data-quality criteria was available to represent the region within about 50 miles of the Ohio River north of Parkersburg, West Virginia. Many of the cross sections were at bridges, which can change channel shape. Although the data discussed in this report may not be

  3. McGET: A rapid image-based method to determine the morphological characteristics of gravels on the Gobi desert surface

    Science.gov (United States)

    Mu, Yue; Wang, Feng; Zheng, Bangyou; Guo, Wei; Feng, Yiming

    2018-03-01

    The relationship between morphological characteristics (e.g. gravel size, coverage, angularity and orientation) and local geomorphic features (e.g. slope gradient and aspect) of desert has been used to explore the evolution process of Gobi desert. Conventional quantification methods are time-consuming, inefficient and even prove impossible to determine the characteristics of large numbers of gravels. We propose a rapid image-based method to obtain the morphological characteristics of gravels on the Gobi desert surface, which is called the "morphological characteristics gained effectively technique" (McGET). The image of the Gobi desert surface was classified into gravel clusters and background by a machine-learning "classification and regression tree" (CART) algorithm. Then gravel clusters were segmented into individual gravel clasts by separating objects in images using a "watershed segmentation" algorithm. Thirdly, gravel coverage, diameter, aspect ratio and orientation were calculated based on the basic principles of 2D computer graphics. We validated this method with two independent datasets in which the gravel morphological characteristics were obtained from 2728 gravels measured in the field and 7422 gravels measured by manual digitization. Finally, we applied McGET to derive the spatial variation of gravel morphology on the Gobi desert along an alluvial-proluvial fan located in Hami, Xinjiang, China. The validated results show that the mean gravel diameter measured in the field agreed well with that calculated by McGET for large gravels (R2 = 0.89, P < 0.001). Compared to manual digitization, the McGET accuracies for gravel coverage, gravel diameter and aspect ratio were 97%, 83% and 96%, respectively. The orientation distributions calculated were consistent across two different methods. More importantly, McGET significantly shortens the time cost in obtaining gravel morphological characteristics in the field and laboratory. The spatial variation results

  4. Genome-Wide Transcriptional Profiling of Clostridium perfringens SM101 during Sporulation Extends the Core of Putative Sporulation Genes and Genes Determining Spore Properties and Germination Characteristics.

    Science.gov (United States)

    Xiao, Yinghua; van Hijum, Sacha A F T; Abee, Tjakko; Wells-Bennik, Marjon H J

    2015-01-01

    The formation of bacterial spores is a highly regulated process and the ultimate properties of the spores are determined during sporulation and subsequent maturation. A wide variety of genes that are expressed during sporulation determine spore properties such as resistance to heat and other adverse environmental conditions, dormancy and germination responses. In this study we characterized the sporulation phases of C. perfringens enterotoxic strain SM101 based on morphological characteristics, biomass accumulation (OD600), the total viable counts of cells plus spores, the viable count of heat resistant spores alone, the pH of the supernatant, enterotoxin production and dipicolinic acid accumulation. Subsequently, whole-genome expression profiling during key phases of the sporulation process was performed using DNA microarrays, and genes were clustered based on their time-course expression profiles during sporulation. The majority of previously characterized C. perfringens germination genes showed upregulated expression profiles in time during sporulation and belonged to two main clusters of genes. These clusters with up-regulated genes contained a large number of C. perfringens genes which are homologs of Bacillus genes with roles in sporulation and germination; this study therefore suggests that those homologs are functional in C. perfringens. A comprehensive homology search revealed that approximately half of the upregulated genes in the two clusters are conserved within a broad range of sporeforming Firmicutes. Another 30% of upregulated genes in the two clusters were found only in Clostridium species, while the remaining 20% appeared to be specific for C. perfringens. These newly identified genes may add to the repertoire of genes with roles in sporulation and determining spore properties including germination behavior. Their exact roles remain to be elucidated in future studies.

  5. Using emergency department-based inception cohorts to determine genetic characteristics associated with long term patient outcomes after motor vehicle collision: Methodology of the CRASH study

    Directory of Open Access Journals (Sweden)

    Peak David A

    2011-09-01

    Full Text Available Abstract Background Persistent musculoskeletal pain and psychological sequelae following minor motor vehicle collision (MVC are common problems with a large economic cost. Prospective studies of pain following MVC have demonstrated that demographic characteristics, including female gender and low education level, and psychological characteristics, including high pre-collision anxiety, are independent predictors of persistent pain. These results have contributed to the psychological and social components of a biopsychosocial model of post-MVC pain pathogenesis, but the biological contributors to the model remain poorly defined. Recent experimental studies indicate that genetic variations in adrenergic system function influence the vulnerability to post-traumatic pain, but no studies have examined the contribution of genetic factors to existing predictive models of vulnerability to persistent pain. Methods/Design The Project CRASH study is a federally supported, multicenter, prospective study designed to determine whether variations in genes affecting synaptic catecholamine levels and alpha and beta adrenergic receptor function augment social and psychological factors in a predictive model of persistent musculoskeletal pain and posttraumatic stress disorder (PTSD following minor MVC. The Project CRASH study will assess pain, pain interference and PTSD symptoms at 6 weeks, 6 months, and 1 year in approximately 1,000 patients enrolled from 8 Emergency Departments in four states with no-fault accident laws. Discussion The results from this study will provide insights into the pathophysiology of persistent pain and PTSD following MVC and may serve to improve the ability of clinicians and researchers to identify individuals at high risk for adverse outcomes following minor MVC.

  6. Determination of time-of-travel, dispersion characteristics, and oxygen reaeration coefficients during low streamflows--Lower Tacony/Frankford Creek, Philadelphia, Pennsylvania

    Science.gov (United States)

    Senior, Lisa A.; Gyves, Matthew C.

    2010-01-01

    Time-of-travel, dispersion characteristics, and oxygen reaeration coefficients were determined by use of dye and gas tracing for a 2-mile reach of Tacony/Frankford Creek in Philadelphia, southeastern Pennsylvania. The reach frequently has concentrations of dissolved oxygen (DO) below the water-quality standard of 4 milligrams per liter during warm months. Several large combined sewer overflows (CSOs), including one of the largest in Philadelphia (former Wingohocking Creek), discharge to the study reach in this urbanized watershed, affecting water quality and the timing and magnitude of storm peaks. In addition, a dam that commonly results in backwater conditions and reduced natural reaeration is present a few hundred feet from the end of the study reach. Time-of-travel and reaeration data were collected under base-flow conditions in August and September 2009 for three sub-reaches from Roosevelt Boulevard (U.S. Route 1) to Castor Avenue. Determination of traveltimes to the centroid of the dye cloud were needed for calculation of the reaeration coefficients. Results of the dye study in Tacony/Frankford Creek indicate that traveltimes were affected by the presence of man-made structures, such as the large scour hole and pool developed at the outfall of the T14 CSO and the dam, both of which reduce stream velocities. Mean stream velocities during the dye-tracer tests ranged from a maximum of 0.44 to 0.04 foot per second through a large pool. The dispersion efficiency of the stream was determined from relations between normalized unit concentrations to time to peak for use in water-quality modeling. Oxygen reaeration coefficients determined by a constant rate-injection method using propane as the tracer gas were as low as 0.04 unit per hour in a long pool affected by backwater conditions behind a dam. The highest reaeration coefficient was 2.29 units per hour for a steep-gradient reach with multiple winding channels through gravel deposits, just downstream of a large

  7. Characteristics and determinants of knowledge transfer policies at universities and public institutions in medical research--protocol for a systematic review of the qualitative research literature.

    Science.gov (United States)

    Jahn, Rosa; Müller, Olaf; Bozorgmehr, Kayvan

    2015-08-19

    Universities, public institutions, and the transfer of knowledge to the private sector play a major role in the development of medical technologies. The decisions of universities and public institutions regarding the transfer of knowledge impact the accessibility of the final product, making it easier or more difficult for consumers to access these products. In the case of medical research, these products are pharmaceuticals, diagnostics, or medical procedures. The ethical dimension of access to these potentially lifesaving products is apparent and distinguishes the transfer of medical knowledge from the transfer of knowledge in other areas. While the general field of technology transfer from academic and public to private actors is attracting an increasing amount of scholarly attention, the specifications of knowledge transfer in the medical field are not as well explored. This review seeks to provide a systematic overview and analysis of the qualitative literature on the characteristics and determinants of knowledge transfer in medical research and development. The review systematically searches the literature for qualitative studies that focus on knowledge transfer characteristics and determinants at medical academic and public research institutions. It aims at identifying and analyzing the literature on the content and context of knowledge transfer policies, decision-making processes, and actors at academic and public institutions. The search strategy includes the databases PubMed, Web of Science, ProQuest, and DiVa. These databases will be searched based on pre-specified search terms. The studies selected for inclusion in the review will be critically assessed for their quality utilizing the Qualitative Research Checklist developed by the Clinical Appraisal Skills Programme. Data extraction and synthesis will be based on the meta-ethnographic approach. This review seeks to further the understanding of the kinds of transfer pathways that exist in medical

  8. Baseline characteristics and treatment of patients in prospective comparison of ARNI with ACEI to determine impact on global mortality and morbidity in heart failure trial (PARADIGM-HF).

    Science.gov (United States)

    McMurray, John J V; Packer, Milton; Desai, Akshay S; Gong, Jianjian; Lefkowitz, Martin; Rizkala, Adel R; Rouleau, Jean L; Shi, Victor C; Solomon, Scott D; Swedberg, Karl; Zile, Michael R

    2014-07-01

    To describe the baseline characteristics and treatment of the patients randomized in the PARADIGM-HF (Prospective comparison of ARNi with ACEi to Determine Impact on Global Mortality and morbidity in Heart Failure) trial, testing the hypothesis that the strategy of simultaneously blocking the renin-angiotensin-aldosterone system and augmenting natriuretic peptides with LCZ696 200 mg b.i.d. is superior to enalapril 10 mg b.i.d. in reducing mortality and morbidity in patients with heart failure and reduced ejection fraction. Key demographic, clinical and laboratory findings, along with baseline treatment, are reported and compared with those of patients in the treatment arm of the Studies Of Left Ventricular Dysfunction (SOLVD-T) and more contemporary drug and device trials in heart failure and reduced ejection fraction. The mean age of the 8442 patients in PARADIGM-HF is 64 (SD 11) years and 78% are male, which is similar to SOLVD-T and more recent trials. Despite extensive background therapy with beta-blockers (93% patients) and mineralocorticoid receptor antagonists (60%), patients in PARADIGM-HF have persisting symptoms and signs, reduced health related quality of life, a low LVEF (mean 29 ± SD 6%) and elevated N-terminal-proB type-natriuretic peptide levels (median 1608 inter-quartile range 886-3221 pg/mL). PARADIGM-HF will determine whether LCZ696 is more beneficial than enalapril when added to other disease-modifying therapies and if further augmentation of endogenous natriuretic peptides will reduce morbidity and mortality in heart failure and reduced ejection fraction. © 2014 The Authors. European Journal of Heart Failure published by John Wiley & Sons Ltd on behalf of European Society of Cardiology.

  9. Determination of glycaemic index; some methodological aspects related to the analysis of carbohydrate load and characteristics of the previous evening meal.

    Science.gov (United States)

    Granfeldt, Y; Wu, X; Björck, I

    2006-01-01

    To determine the possible differences in glycaemic index (GI) depending on (1) the analytical method used to calculate the 'available carbohydrate' load, that is, using carbohydrates by difference (total carbohydrate by difference, minus dietary fibre (DF)) as available carbohydrates vs available starch basis (total starch minus resistant starch (RS)) of a food rich in intrinsic RS and (2) the effect of GI characteristics and/or the content of indigestible carbohydrates (RS and DF) of the evening meal prior to GI testing the following morning. Blood glucose and serum insulin responses were studied after subjects consuming (1) two levels of barley kernels rich in intrinsic RS (15.2%, total starch basis) and (2) after a standard breakfast following three different evening meals varying in GI and/or indigestible carbohydrates: pasta, barley kernels and white wheat bread, respectively. Healthy adults with normal body mass index. (1) Increasing the portion size of barley kernels from 79.6 g (50 g 'available carbohydrates') to 93.9 g (50 g available starch) to adjust for its RS content did not significantly affect the GI or insulin index (11). (2) The low GI barley evening meal, as opposed to white wheat bread and pasta evening meals, reduced the postprandial glycaemic and insulinaemic (23 and 29%, respectively, P base carbohydrate load on specific analyses of the available carbohydrate content. (2) A low GI barley evening meal containing high levels of indigestible carbohydrates (RS and DF) substantially reduced the GI and II of white wheat bread determined at a subsequent breakfast meal.

  10. Characteristics and Determinants of Partial Remission in Children with Type 1 Diabetes Using the Insulin-Dose-Adjusted A1C Definition

    Directory of Open Access Journals (Sweden)

    Aurore Pecheur

    2014-01-01

    Full Text Available To evaluate the characteristics and determinants of partial remission (PR in Belgian children with type 1 diabetes (T1D, we analyzed records of 242 children from our center. Clinical and biological features were collected at diagnosis and during follow-up. PR was defined using the insulin-dose-adjusted A1C definition. PR occurred in 56.2% of patients and lasted 9.2 months (0.5 to 56.6. 25.6% of patients entered T1D with DKA, which correlated with lower PR incidence (17.6% versus 82.3% when no DKA. In our population, lower A1C levels at diagnosis were associated with higher PR incidence and in young children (0–4 years initial A1C levels negatively correlated with longer PR. Early A1C levels were predictive of PR duration since 34% of patients had long PRs (>1 year when A1C levels were ≤6% after 3 months whereas incidence of long PR decreased with higher A1Cs. C-peptide levels were higher in patients entering PR and remained higher until 3 years after diagnosis. Initial antibody titers did not influence PR except for anti-IA2 titers that correlated with A1C levels after 2 years. Presence of 2 versus 1 anti-islet antibodies correlated with shorter PR. PR duration did not influence occurrence of severe hypoglycemia or diabetes-related complications but was associated with lower A1C levels after 18 months. We show that, at diagnosis of T1D, parameters associated with β-cell mass reserve (A1C, C-peptide, and DKA correlate with the occurrence of PR, which affects post-PR A1C levels. Further research is needed to determine the long-term significance of PR.

  11. Some characteristics of the Atomic Energy Organization of Iran (AEOI) passive radon diffusion dosimeter for indoor exposure determination of public in Iran

    International Nuclear Information System (INIS)

    Sohrabi, M.; Solaymanian, A.R.

    1989-01-01

    A Passive Radon diffusion dosimeter (PRDD) was developed at the Radiation Protection Department of the Atomic Energy Organization of Iran (AEOI) for large scale radon level measurements in Iran. It consists of a plastic cup with a polycarbonate alpha detector in the middle, a plastic top cover with an opening holding a fiberglass filter and a hard aluminium mesh for protection and support. A new design of our multi-chamber system was used for multiple foil etching. The effects of pre-etching and ECE times, chamber volume, filter diameter and foil position inside the chamber were investigated. The optimized geometries include 9.5 cm height, 269 cm 3 volume and 2-3 cm filter diameter with the polycarbonate foil mounted in the middle. A sensitivity of 0.05+-0.007 tracks cm -2 /Bq.m -3 day or 1.96+-0.28 tracks cm -2 /pCi.1 -1 day was obtained at optimized conditions. The characteristics of the dosimeter as well as some preliminary results of indoor radon level measurements for determination of public exposure in 250 houses in different cities of Iran including Tehran, Ramsar, Babolsar and Gonabad are presented. The highest radon levels were found in high natural areas of Ramsar

  12. Study on the simultaneous determination of seven benzoylurea pesticides in Oolong tea and their leaching characteristics during infusing process by HPLC-MS/MS.

    Science.gov (United States)

    Chen, Lei; Chen, JinFa; Guo, Ying; Li, JianRong; Yang, YiQiang; Xu, LiangJun; Fu, FengFu

    2014-01-15

    A method for the simultaneous determination of 7 benzoylurea pesticides (chlorfluazuron, diflubenzuron, fluazuron, flufenoxuron, hexaflumuron, teflubenzuron and triflumuron) in the manufactured Oolong tea leaves and its infusion was described. The method has a LOD of 0.03-1.00ng/mL, a recovery of 90.4-103% for made tea and 90.3-102% for tea-infused liquid, respectively. By using the proposed method, the leaching characteristics of above 7 pesticides during infusing process were investigated. The experimental results revealed that: (1) diflubenzuron can be most easily extracted out during infusing process, followed by triflumuron, teflubenzuron, hexaflumuron, chlorfluazuron, flufenoxuron and fluazuron. (2) The leaching of flufenoxuron and chlorfluazuron during infusing process seems to be controlled by only their solubility, whereas, the leaching of other 5 benzoylurea insecticides was primarily controlled by their partitioning coefficient between made tea and hot water. The results of this study are helpful for the accurate evaluation of the safety of Oolong tea. Copyright © 2013 Elsevier Ltd. All rights reserved.

  13. A paradox in the restoration of limestone quarries on mediterranean basin: physical characteristics of substrate as determinant of dynamics of created system

    International Nuclear Information System (INIS)

    Jorba, M.; Hereter, A.; Josa March, R.

    2009-01-01

    The restoration of open cast mining land looks for the quick integration in the landscape and the erosion control of derelict areas. The characteristics of substrate can determinate the behaviour of novel system. The stony substrates used have a great Ks and a very low water storage capacity. This paper presents the results of an experiment performed on story mineral substrates amended with sewage sludge under Mediterranean climatic conditions in a limestone quarry in the SW of Barcelona (NE of Spain). the experiments was carried out at container scale and the aim was to evaluate the vegetation response in two substrates with different stoniness and with irrigation during dry period. Water content in the mineral substrate was monitored using vertical TDR probes during the experiment. The growth of introduced plants was monitored monthly. Throughout the experiment, populations of sown plants fluctuated according to the available water in the substrate. The irrigation applied was not sufficient to maintain the vegetation in summer (period of higher evaporative demand at that time of year). The volume of leachate was high and nitrates, sulfates and chlorides were washed. (Author) 4 refs.

  14. Investigation of the Anti-Melanogenic and Antioxidant Characteristics of Eucalyptus camaldulensis Flower Essential Oil and Determination of Its Chemical Composition

    Science.gov (United States)

    Huang, Huey-Chun; Ho, Ya-Chi; Lim, Jia-Min; Chang, Tzu-Yun; Ho, Chen-Lung; Chang, Tsong-Min

    2015-01-01

    The effects of essential oil from Eucalyptus camaldulensis flowers oil on melanogenesis and the oil’s antioxidant characteristics were investigated. Assays of mushroom and cellular tyrosinase activities and melanin content of mouse melanoma cells were performed spectrophotometrically, and the expression of melanogenesis-related proteins was determined by Western blotting. The possible signaling pathways involved in essential oil-mediated depigmentation were also investigated using specific protein kinase inhibitors. The results revealed that E. camaldulensis flower essential oil effectively suppresses intracellular tyrosinase activity and decreases melanin amount in B16F10 mouse melanoma cells. The essential oil also exhibits antioxidant properties and effectively decreases intracellular reactive oxygen species (ROS) levels. The volatile chemical composition of the essential oil was analyzed with gas chromatography–mass spectrometry (GC/MS). The chemical constituents in the essential oil are predominately oxygenated monoterpenes (34.9%), followed by oxygenated sesquiterpenes (31.8%), monoterpene hydrocarbons (29.0%) and sesquiterpene hydrocarbons (4.3%). Our results indicated that E. camaldulensis flower essential oil inhibits melanogenesis through its antioxidant properties and by down-regulating both mitogen-activated protein kinases (MAPK) and protein kinase A (PKA) signaling pathways. The present study indicates that the essential oil has the potential to be developed into a skin care product. PMID:25961954

  15. Simultaneous determination of five characteristic stilbene glycosides in root bark of Morus albus L. (Cortex Mori) using high-performance liquid chromatography.

    Science.gov (United States)

    Piao, Shu-juan; Chen, Li-xia; Kang, Ning; Qiu, Feng

    2011-01-01

    Cortex Mori, one of the well-known traditional Chinese herbal medicines, is derived from the root bark of Morus alba L. according to the China Pharmacopeia. Stilbene glycosides are the main components isolated from aqueous extracts of Morus alba and their content varies depending on where Cortex Mori was collected. We have established a qualitative and quantitative method based on the bioactive stilbene glycosides for control of the quality of Cortex Mori from different sources. To develop a high-performance liquid chromatography coupled with ultraviolet absorption detection for simultaneous quantitative determination of five major characteristic stilbene glycosides in 34 samples of the root bark of Morus alba L. (Cortex Mori) from different sources. The analysis was performed on an ODS column using methanol-water-acetic acid (18: 82: 0.1, v/v/v) as the mobile phase and the peaks were monitored at 320 nm. All calibration curves showed good linearity (r ≥ 0.9991) within test ranges. This method showed good repeatability for the quantification of these five components in Cortex Mori with intra- and inter-day standard deviations less than 2.19% and 1.45%, respectively. The validated method was successfully applied to quantify the five investigated components, including a pair of cis-trans-isomers 1 and 2 and a pair of isomers 4 and 5 in 34 samples of Cortex Mori from different sources. Copyright © 2010 John Wiley & Sons, Ltd.

  16. Modelling of the $t\\bar{t}H$ and $t\\bar{t}V$ $(V=W,Z)$ processes for $\\sqrt{s}=13$ TeV ATLAS analyses

    CERN Document Server

    The ATLAS collaboration

    2016-01-01

    Production of top quark pairs in association with heavy Standard Model bosons is important both as a signal and a background in several ATLAS analyses. Strong constraints on such processes cannot at present be obtained from data, and therefore their modelling by Monte Carlo simulation as well as the associated uncertainties are important. This note documents the Monte Carlo samples currently being used in ATLAS for the $t\\bar{t}H$ and $t\\bar{t}V$ ($V=W,Z$ vector bosons) processes for $\\sqrt{s}=13$ TeV proton-proton collisions.

  17. Determination of the effects of organic antioxidants and fat sources on performance, carcass and bone characteristics of broilers under heat stress

    Directory of Open Access Journals (Sweden)

    seyyed javad Hosseini-vashan

    2016-11-01

    experiment. The photoperiod schedule, vaccination, ventilation and humidity were applied according to the recommendation of Ross management catalog. At 28 d. (before heat stress PHS and 42 d. (after heat stress AHS of age, two chicks per replicate were bled and slaughtered. The relative weight of carcass, intestine, thigh, liver, spleen, intestine, pancreases, gall bladder and abdominal fat were determined. The bone characteristics including dry matter, ash, calcium, phosphorous, bone length, diaphysis diameter were studied. The data were analyzed by GLM procedure of SAS software and the differences among mean were investigated by tukey test. Results and discussions The results indicated that body weight gain enhanced when chicks fed diets containing canola oil or 5% TP. Canola oil including diet decreased the FCR at 28d (P

  18. Incorporation of a Helical Tube Heat Transfer Model in the MARS Thermal Hydraulic Systems Analysis Code for the T/H Analyses of the SMART Reactor

    International Nuclear Information System (INIS)

    Young Jin Lee; Bub Dong Chung; Jong Chull Jo; Hho Jung Kim; Un Chul Lee

    2004-01-01

    SMART is a medium sized integral type advanced pressurized water reactor currently under development at KAERI. The steam generators of SMART are designed with helically coiled tubes and these are designed to produce superheated steam. The helical shape of the tubes can induce strong centrifugal effect on the secondary coolant as it flows inside the tubes. The presence of centrifugal effect is expected to enhance the formation of cross-sectional circulation flows within the tubes that will increase the overall heat transfer. Furthermore, the centrifugal effect is expected to enhance the moisture separation and thus make it easier to produce superheated steam. MARS is a best-estimate thermal-hydraulic systems analysis code with multi-phase, multi-dimensional analysis capability. The MARS code was produced by restructuring and merging the RELAP5 and the COBRA-TF codes. However, MARS as well as most other best-estimate systems analysis codes in current use lack the detailed models needed to describe the thermal hydraulics of helically coiled tubes. In this study, the heat transfer characteristics and relevant correlations for both the tube and shell sides of helical tubes have been investigated, and the appropriate models have been incorporated into the MARS code. The newly incorporated helical tube heat transfer package is available to the MARS users via selection of the appropriate option in the input. A performance analysis on the steam generator of SMART under full power operation was carried out using the modified MARS code. The results of the analysis indicate that there is a significant improvement in the code predictability. (authors)

  19. Search for the tH(H$\\to \\text{b}\\bar{\\text{b}}$) process in pp collisions at $\\sqrt{s}=13\\,\\mathrm{TeV}$ and study of Higgs boson couplings

    CERN Document Server

    CMS Collaboration

    2018-01-01

    A search for the production of a Higgs boson in association with a single top quark (tH) is presented. The analysis focuses on Higgs boson decays to bottom quark-antiquark pairs and leptonic top quark decays. The full data set of pp collisions recorded by the CMS detector in 2016 at a center-of-mass energy of $13\\,\\mathrm{TeV}$, corresponding to an integrated luminosity of $35.9\\,\\mathrm{fb}^{-1}$, is analyzed. A multivariate classifier is used to discriminate signal candidates from the overwhelming background processes. Several scenarios for varied strength of the coupling of the Higgs boson to top quarks and to vector bosons are examined and limits on the combined cross section for Higgs boson production, either in association with a pair of top quarks or a single top quark, are derived. In addition, limits on the signal strength of Higgs boson production in association with a single top quark are set for two specific cases. The observed (expected) limit for tH production in the standard model is 89.5 ($41....

  20. Search for $\\mathrm{t\\overline{t}H}$ production in the $\\mathrm{H}\\rightarrow \\mathrm{b\\overline{b}}$ decay channel with $\\sqrt{s}=13~\\mathrm{TeV}$ pp collisions at the CMS experiment

    CERN Document Server

    CMS Collaboration

    2016-01-01

    First results of the search for the associated production of a Higgs boson with a top quark-antiquark pair ($\\mathrm{t\\overline{t}H}$) in proton-proton collisions at a center-of-mass energy of $\\sqrt{s} = 13~\\mathrm{TeV}$ are presented. The data correspond to an integrated luminosity of $2.7~\\mathrm{fb}^{-1}$ recorded with the CMS experiment in 2015. Candidate $\\mathrm{t\\overline{t}H}$ events are selected with criteria enhancing the lepton+jets or dileptonic decay channels of the $\\mathrm{t\\overline{t}}$ system and the decay of the Higgs boson into a bottom quark-antiquark pair ($\\mathrm{H}\\rightarrow \\mathrm{b\\overline{b}}$). In order to increase the sensitivity of the search, selected events are split into several categories with different expected signal and background rates. In each category signal and background events are separated using a multivariate approach that combines a physics-motivated method (matrix element method, MEM) with methods from machine learning (boosted decision trees, BDTs). The res...

  1. Are P.T.H. plasma levels useful for the selection of patients with secondary hyperparathyroidism for preoperative MIBI (99mTc)/123I dual-isotope scintigraphy?

    International Nuclear Information System (INIS)

    Balogova, S.; Sauer, A.M.; Dudczak, J.; Pascal, O.; Kerrou, K.; Huchet, V.; Montravers, F.; Talbot, J.N.; Perie, S.; Lacau St-Guily, J.; Nataf, V.; Balogova, S.

    2010-01-01

    The utility of preoperative scintigraphy in case of secondary hyperparathyroidism is questioned by some authors. Obviously, an imaging modality that will detect all hyperplastic glands, including the ectopic ones, would be of interest in those patients at high risk for surgery. However, scintigraphy has a limited detection rate in some patients. We investigated whether one of the following parameters would identify a subgroup of patients in whom the detection rate would be optimal: age, gender, hemodialysis and duration since its onset, and plasma levels of parathyrin (P.T.H.). Methods: Retrospective series of 38 patients referred for preoperative parathyroid scintigraphy due to secondary hyperparathyroidism who then underwent para thyroidectomy. Scintigraphy was performed 20 min and then 3 h after injection of 8 MBq/kg of sestamibi ( 99m Tc) with a previous ingestion of 0.1 MBq/kg iodine-123, 3 h before. Result: No significant correlation was observed between the number of glands detected on scintigraphy (and confirmed by postoperative histology) and plasma P.T.H. levels (r = -0.17). A weak positive correlation (r = +0.34) was noted in the group of six non-hemo dialysed patients. No significant relationship between this number of detected glands and a clinical parameter was observed. Conclusion: In our experience, these parameters do not permit to select, among patients with secondary hyperparathyroidism and scheduled for para thyroidectomy, those who will better benefit from parathyroid scintigraphy. (authors)

  2. Characteristics and determinants of clinical symptoms in radiographic lumbar spinal stenosis in a tertiary health care centre in sub-Saharan Africa.

    Science.gov (United States)

    Doualla-Bija, Marie; Takang, Mbeng Ashu; Mankaa, Emmanuella; Moutchia, Jude; Ongolo-Zogo, Pierre; Luma-Namme, Henry

    2017-11-28

    Lumbar spinal stenosis (LSS) refers to narrowing of the lumbar central spinal canal, lateral recess, and/or neuro-foramina. Radiographic LSS plays an important role in clinical LSS but is not solely accountable for the presence of symptoms. We sought to characterise clinical LSS and to determine factors associated with presence of symptoms of LSS in patients with radiographic LSS in a sub Saharan Africa setting. After prior ethical clearance, a case control study was done in a tertiary hospital in Douala-Cameroon, including 105 patients with radiographic LSS: 57 with symptoms of LSS (cases) and 58 with no symptoms (controls). Spinal stenosis was assessed using computed tomography (CT) scans. Data were analysed using SPSS version 23. The mean age of our study participants was 53.4 ± 13.1 years. The mean age of onset of symptoms of LSS was 50.3 ± 11.6 years and the most common symptoms were Low back pain (100.0%), radicular symptoms (98.2%) and neurogenic claudication (98.2%). Obesity (p history of low back pain (p = 0.004), vertebra lesion at L2 (p = 0.034), L3 (p = 0.002), L4 (p = 0.025) and multiple (p = 0.008) levels, degenerative disc protrusion (p = 0.044), disc lesion at L3-L4 (p = 0.001), L4-L5 (p = 0.011) and multiple (p = 0.046) levels were significantly associated with presence of symptoms of LSS in persons with radiographic LSS. Characteristics of clinical LSS have been described in this sub-Saharan Africa population. Obesity, a high waist circumference and a positive family history of low back pain are significantly associated with presence of symptoms of LSS in persons with radiographic LSS.

  3. Protocol for determining primary healthcare practice characteristics, models of practice and patient accessibility using an exploratory census survey with linkage to administrative data in Nova Scotia, Canada.

    Science.gov (United States)

    Marshall, Emily Gard; Gibson, Richard J; Lawson, Beverley; Burge, Frederick

    2017-03-16

    There is little evidence on how primary care providers (PCPs) model their practices in Nova Scotia (NS), Canada, what services they offer or what accessibility is like for the average patient. This study will create a database of all family physicians and primary healthcare nurse practitioners in NS, including information about accessibility and the model of care in which they practice, and will link the survey data to administrative health databases. 3 census surveys of all family physicians, primary care nurse practitioners (ie, PCPs) and their practices in NS will be conducted. The first will be a telephone survey conducted during typical daytime business hours. At each practice, the person answering the telephone will be asked questions about the practice's accessibility and model of care. The second will be a telephone survey conducted after typical daytime business hours to determine what out-of-office services PCP practices offer their patients. The final will be a tailored fax survey that will collect information that could not be obtained in the first 2 surveys plus new information on scope of practice, practice model and willingness to participate in research. Survey data will be linked with billing data from administrative health databases. Multivariate regression analysis will be employed to assess whether access and availability outcome variables are associated with PCP and model of practice characteristics. Negative binomial regression analysis will be employed to assess the association between independent variables from the survey data and health system use outcomes from administrative data. This study has received ethical approval from the Nova Scotia Health Authority and the Health Data Nova Scotia Data Access Committee. Dissemination approached will include stakeholder engagement at local and national levels, conference presentations, peer-reviewed publications and a public website. Published by the BMJ Publishing Group Limited. For permission to

  4. Analysis of the soil amplification factor in NCSE-02 and Eurocode-8 regulations: application to the 11{sup t}h May , 2011 Lorca earthquake; Analisis del efecto de amplificacion sismica por suelos en las normativas NCSE-02 y Eurocodigo 8: aplicacion al terremoto de Lorca del 11 de Mayo de 2011

    Energy Technology Data Exchange (ETDEWEB)

    Corsino Fernandez, C.; Garcia-Mayordomo, J.

    2014-07-01

    Earthquakes are one of the geological hazards which have produced more human and material loses in the history of manking. Seismic engineering has the purpose of studying the soil dynamic behavior in order to desing structures and buildings adapted to the effects triggered by earthquakes. Within this purpose, one of the most important tasks has been the sutdy of the amplifying effect of seismic movement due to ground characteristics, which is often a major cause responsible of the damage produced by earthquakes, even when their magnitude is not very high. In this article, the soil amplifying effects is considered according to two official sismorresistant regulations in Spain: the current Norma de Construccion Sismorresistente Espanola (NCSE-02) and the European regulation Eurocode 8 (EC-8). First, soils classification different criteria is analyzed and how this affects the soil factor and, particularly, the design seismic action in the form of response spectra. Subsequently, we compared the result of apllying both regulations to typical geological scenarios where the application of either regulation may cause notable differences. The second part of the paper deals with the comparison of NCSE-02 and EC-8 applied in the frame of a real case: the 11{sup t}h May, 2011 Lorca earthquake. We compare the response spectra from both regulations to the actual response spectra derived from the accelerometric record of the earthquake at the Lorca station, and discuss which one fits it better. (Author)

  5. Effect of Different Levels of Irrigation Water on Quantitative and Qualitative Characteristics of Potato and Determination of Its Optimum Consumptive Use of Water in Shahrekord

    Directory of Open Access Journals (Sweden)

    masoud Naderi

    2017-01-01

    Full Text Available Introduction: Owing to drought, increasing demand for fresh water resources and low water use efficiency, the optimum use of water is essential in the agricultural sector. Therefore, this study was conducted to investigate the effect of different levels of irrigation water on quantitative and qualitative Characteristics of potato (Burren cultivar and determination of its optimum consumptive use of water under Shahr-e kord environment. Materials and Methods: This study was conducted at the Agricultural Research Center and Natural Resources in Shahr-e kord with longitude and latitude of 32˚18΄ and 50˚51΄ , respectively, in 2013. This experiment was performed in randomized complete block design with 7 treatments consisted of different levels of irrigation water and 3 replications. Different levels of irrigation water were: 40, 55, 70, 85, 100, 115 and 130 % of the soil moisture deficit. Potato seeds (burren cultivar were planted with distance of 20 cm from each other and furrow width of 75 cm. Irrigation program were performed based on the measurement of soil moisture deficit. The irrigation intervals were considered as a fixed 7 day. Irrigation levels were applied to 105 days after planting and the total growth period was 130 days from planting to harvesting. The samples were taken from the two middle furrows. The evaluated parameters were included weight of tubers per plant, tuber diameter, weight of tuber in seed size, weight of tuber production in a plant in marketable size, tuber dry weight, the starch percent, percent of soluble sugars, nitrogen percent. The starch content was determined by Polarimetry method. The soluble sugars content was measured by Colorimetric method, the nitrogen content was measured by wet digestion method and using the Kjeldahl set. Then, the optimal depth of water consumption in conditions of limited water resources were determined by English method Statistical analysis of data and drawing graphs were done with

  6. Determinacion de las características fisicas y propiedades mecanicas de papa cultivada en Colombia Determination of physical characteristics and mechanical properties of potatoes cultivated in Columbia

    Directory of Open Access Journals (Sweden)

    Germán V. Buitrago

    2004-04-01

    Full Text Available El objetivo del proyecto es determinar las propiedades físico-mecánicas de tres variedades de papa (criolla, pastusa y capiro, necesarias para el diseño y operación de maquinaria para siembra, cosecha, postcosecha y para el adecuado almacenamiento del producto. Se midieron propiedades físicas como: dimensiones axiales, esfericidad, redondez, ángulo de reposo, densidad real, densidad aparente y porosidad. Igualmente se determinaron propiedades mecánicas tales como: resistencia a la compresión, al corte, al punzonamiento y coeficiente de fricción. Se tomaron como factores de variación para cada variedad, el tamaño y el tiempo de toma de las observaciones (cada 15 días durante 90 días, utilizando el método por bloques completamente aleatorios. Los datos fueron sometidos a un análisis estadístico de varianzas, utilizando el método Duncan. Las propiedades físicas variaron de manera similar, de tal manera que la esfericidad y la redondez aumentava a medida que el tamaño disminuye. La porosidad es superior al 48% y el ángulo de reposo es el característico de formas aproximadamente esféricas para las tres variedades analizadas. La principal influencia sobre la variabilidad en las propiedades mecánicas es el cambio en el contenido de humedad; también se detectó una pérdida de turgencia con el paso del tiempo que genera mayor elasticidad en el tubérculo, lo cual le permite soportar mayores cargas. La variedad Criolla presenta una resistencia entre tres y cinco veces mayor al corte, punzonamiento y compresión, con relación a las variedades Capiro y Pastusa.The aim of this work is to determine the physical and mechanical properties of three varieties of potatoes (Criolla, Pastusa and Capiro, in order to use them in the design and management of sowing, harvest and postharvest machines and adopt storage time of potato. Some of the physical properties like: axial dimensions, sphericity, roundness, repose angle, apparent density

  7. Examining Adjunct Instructor Characteristics, Perceived Fit, and Teaching Modality to Determine if They Predict Organizational Commitment and Job Satisfaction at a Midwestern Career College

    Science.gov (United States)

    Hill, Randy James

    2014-01-01

    The purpose of this quantitative, multiple regression study was to examine the relationship between 10 adjunct instructor characteristics and organizational commitment and job satisfaction. Part-time instructors who taught for the institution during the 2012-2013 academic year completed an electronic survey with questions from three valid and…

  8. Genome-Wide Transcriptional Profiling of Clostridium perfringens SM101 during Sporulation Extends the Core of Putative Sporulation Genes and Genes Determining Spore Properties and Germination Characteristics

    NARCIS (Netherlands)

    Xiao, Y.; Hijum, S.A.F.T. van; Abee, T.; Wells-Bennik, M.H.

    2015-01-01

    The formation of bacterial spores is a highly regulated process and the ultimate properties of the spores are determined during sporulation and subsequent maturation. A wide variety of genes that are expressed during sporulation determine spore properties such as resistance to heat and other adverse

  9. Genome-wide transcriptional profiling of Clostridium perfringens SM101 during sporulation extends the core of putative sporulation genes and genes determining spore properties and germination characteristics

    NARCIS (Netherlands)

    Xiao, Y.; Hijum, van S.A.F.T.; Abee, T.; Wells-Bennik, M.H.J.

    2015-01-01

    The formation of bacterial spores is a highly regulated process and the ultimate properties of the spores are determined during sporulation and subsequent maturation. A wide variety of genes that are expressed during sporulation determine spore properties such as resistance to heat and other adverse

  10. Determination of PV Generator I-V/P-V Characteristic Curves Using a DC-DC Converter Controlled by a Virtual Instrument

    Directory of Open Access Journals (Sweden)

    E. Durán

    2012-01-01

    Full Text Available A versatile measurement system for systematic testing and measurement of the evolution of the I-V characteristic curves of photovoltaic panels or arrays (PV generators is proposed in this paper. The measurement system uses a circuit solution based on DC-DC converters that involves several advantages relative to traditional methods: simple structure, scalability, fast response, and low cost. The measurement of the desired characteristics of PV generators includes high speed of response and high fidelity. The prototype system built is governed by a microcontroller, and experimental results prove the proposed measurement system useful. A virtual instrument (VI was developed for full system control from a computer. The developed system enables monitoring the suitable operation of a PV generator in real time, since it allows comparing its actual curves with those provided by the manufacturer.

  11. [On the use of the spectral speech characteristics for the determination of biometric parameters of the vocal tract in forensic medical identification of the speaker's personality].

    Science.gov (United States)

    Kaganov, A Sh

    2014-01-01

    The objective of the present study was to elucidate the relationship between the spectral speech characteristics and the biometric parameters of the speaker's vocal tract. The secondary objective was to consider the theoretical basis behind the medico-criminalistic personality identification from the biometric parameters of the speaker's vocal tract. The article is based on the results of real forensic medical investigations and the literature data.

  12. Transport characteristics of Pd Schottky barrier diodes on epitaxial n-GaSb as determined from temperature dependent current–voltage measurements

    Energy Technology Data Exchange (ETDEWEB)

    Venter, A., E-mail: andre.venter@nmmu.ac.za [Department of Physics, Nelson Mandela Metropolitan University, P.O. Box 77000, Port Elizabeth 6031 (South Africa); Murape, D.M.; Botha, J.R. [Department of Physics, Nelson Mandela Metropolitan University, P.O. Box 77000, Port Elizabeth 6031 (South Africa); Auret, F.D. [Department of Physics, University of the Pretoria, Lynnwood Road, Pretoria 0002 (South Africa)

    2015-01-01

    The temperature dependent transport characteristics of Pd/n-GaSb:Te Schottky contacts with low and saturating reverse current are investigated by means of current–voltage measurements between 80 K and 320 K. The apparent barrier height and ideality factor increase with a decrease in temperature. Neither thermionic nor thermionic field emission can explain the low temperature characteristics of these diodes. Instead, evidence is presented for barrier inhomogeneity across the metal/semiconductor contact. A plot of the barrier height, ϕ{sub b} vs. 1/2kT revealed a double Gaussian distribution for the barrier height with ϕ{sub b,mean} assuming values of 0.59 eV ± 0.07 (80–140 K) and 0.25 eV ± 0.12 (140–320 K) respectively. - Highlights: • Transport characteristics of Pd/epitaxial n-GaSb:Te SBDs are studied by means of I-V-T measurements. • SBDs have remarkably low and saturating reverse current – of the lowest ever reported for GaSb. • Transport behaviour is explained by considering electronic states present on the GaSb surface. • Evidence is presented for barrier inhomogeneity across the metal-semiconductor contact.

  13. Transport characteristics of Pd Schottky barrier diodes on epitaxial n-GaSb as determined from temperature dependent current–voltage measurements

    International Nuclear Information System (INIS)

    Venter, A.; Murape, D.M.; Botha, J.R.; Auret, F.D.

    2015-01-01

    The temperature dependent transport characteristics of Pd/n-GaSb:Te Schottky contacts with low and saturating reverse current are investigated by means of current–voltage measurements between 80 K and 320 K. The apparent barrier height and ideality factor increase with a decrease in temperature. Neither thermionic nor thermionic field emission can explain the low temperature characteristics of these diodes. Instead, evidence is presented for barrier inhomogeneity across the metal/semiconductor contact. A plot of the barrier height, ϕ b vs. 1/2kT revealed a double Gaussian distribution for the barrier height with ϕ b,mean assuming values of 0.59 eV ± 0.07 (80–140 K) and 0.25 eV ± 0.12 (140–320 K) respectively. - Highlights: • Transport characteristics of Pd/epitaxial n-GaSb:Te SBDs are studied by means of I-V-T measurements. • SBDs have remarkably low and saturating reverse current – of the lowest ever reported for GaSb. • Transport behaviour is explained by considering electronic states present on the GaSb surface. • Evidence is presented for barrier inhomogeneity across the metal-semiconductor contact

  14. Family functionality and parental characteristics as determinants of sexual decision-making of in-school youths in a semi-urban area of Southwest Nigeria.

    Science.gov (United States)

    Adebayo, Ayodeji M; Ajuonu, Ezidinma J; Betiku, Benson O

    2016-11-01

    Though research findings have indicated that family characteristics have a bearing on sexual behavior, there is a paucity of published literature on the role of family functionality and parental characteristics on adolescent sexual decision-making. This study was designed to assess the role of family function and parental influence on sexual behavior of in-school youths in secondary schools in a sub-urban area of Southwest Nigeria. A descriptive cross-sectional study was conducted among secondary school students using semi-structured interviewer-assisted questionnaire. Information was obtained on the sexual behavior and parent-child characteristics. Family functionality was assessed using family APGAR standardized instrument. Association was established using χ2-test for qualitative variables and t-test for quantitative variables at p=0.05. Mean age of respondents was 14.8±2.2 years. Majority were from monogamous family setting (70.7%) and lived with their families (75.6%). About a quarter (26.8%) was from dysfunctional families and 9.2% had ever had sexual intercourse. Recent sexual engagement in the preceding 1 month was reported (47.4%). The mean score for parental monitoring, father-child communication, mother-child communication, and parental disapproval of sex were 10.4±2.2, 9.3±2.3, 9.8±2.4, and 10.4±2.3, respectively. There was a significant association between parental monitoring (t=3.9, p≤0.001), mother-child communication (t=3.03, p=0.003), and parental disapproval of sex (t=5, p≤0.001); and sexual experience. This study showed that parental influence had a vital role in the sexual behavior of young persons. Advocacy and health education interventions are needed among parents regarding their role in the sexual behavior of in-school youths.

  15. Spatial nonuniformity of current flow and its consideration in determination of characteristics of surface illuminated InAsSbP/InAs-based photodiodes

    Energy Technology Data Exchange (ETDEWEB)

    Zotova, N V; Karandashev, S A; Matveev, B. A., E-mail: Bmat@iropt3.ioffe.ru; Remennyy, M A; Rybal' chenko, A Yu; Stus' , N M [Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)

    2011-04-15

    Current-voltage characteristics of surface-irradiated photodiodes based on the InAsSbP/InAs structures are analyzed using experimental data on the distribution of electroluminescence intensity over the diode surface and taking into account thickening the current streamlines near the contacts. The influence of the potential barrier associated with the N-InAsSbP/n-InAs junction in double heterostructures on the differential resistance of diodes under zero bias, the value of the reverse current, and spreading of the forward current is discussed.

  16. Spatial nonuniformity of current flow and its consideration in determination of characteristics of surface illuminated InAsSbP/InAs-based photodiodes

    International Nuclear Information System (INIS)

    Zotova, N. V.; Karandashev, S. A.; Matveev, B. A.; Remennyy, M. A.; Rybal’chenko, A. Yu.; Stus’, N. M.

    2011-01-01

    Current-voltage characteristics of surface-irradiated photodiodes based on the InAsSbP/InAs structures are analyzed using experimental data on the distribution of electroluminescence intensity over the diode surface and taking into account thickening the current streamlines near the contacts. The influence of the potential barrier associated with the N-InAsSbP/n-InAs junction in double heterostructures on the differential resistance of diodes under zero bias, the value of the reverse current, and spreading of the forward current is discussed.

  17. Transport of radioactive material in the United States: results of a survey to determine the magnitude and characteristics of domestic, unclassified shipments of radioactive materials. Final report

    International Nuclear Information System (INIS)

    Javitz, H.S.; Lyman, T.R.; Maxwell, C.; Myers, E.L.; Thompson, C.R.

    1985-04-01

    SRI International has completed a project for the Sandia National Laboratories designed to create a statistical data base identifying the volume and characteristics of shipments of unclassified radioactive materials (RAM)* in the continental United States. Agencies providing resources for this project have included: Nuclear Regulatory Commission (NRC) Department of Transportation (DOT) Department of Energy (DOE) Federal Emergency Management Agency (FEMA). Technical management of the project was the responsibility of the Transportation Technology Center (TTC) of Sandia National Laboratories. This report is intended only as a brief summary of a project having as its primary product the Radioactive Materials Transportation (RAMT) survey data base provided by SRI to TTC. The data in the RAMT data base comes from two principal sources - a survey of NRC and Agreement State licensees (referred to as the Licensee survey) and a survey of DOE contractors (referred to as the DOE survey). This report provides summary information on: project background; objectives; approach; survey response; basic tables and discussion of shipment characteristics; and technical appendices. 21 figs., 15 tabs

  18. DETERMINING AND VERIFYING THE GEOMETRIC CHARACTERISTICS OF HELICAL GROOVES IN THE WORM IN PLANETARY TOROIDAL DRIVES IN A MORE EFFECTIVE WAY

    Directory of Open Access Journals (Sweden)

    Jarmila VOJTKOVÁ

    2017-09-01

    Full Text Available In the toroidal drive, a screw-shaped groove is cut into the globoid worm. There is contact with the rolling element in this groove. This helix can be described by parametric equations. When calculating the values of the first and second curvature of the curve, as well as the radius of curvature, we must calculate the individual derivations. A new, more effective way is to determine the values already mentioned by using NX software only. When using Siemens PLM NX software, it is not necessary to determine individual derivations and their values, although the NX software determines the radii of the first and second curvature, based on the defined helix curve.

  19. Comparative characteristics of metacarpal bones (Ossa metacarpi) and finger articles (Ossa digitorum pedis seu phalanges digitorum) of roe deer (Capreolus capreolus) and sheep (Ovis aries) in order to determine animal species

    OpenAIRE

    Blagojević Miloš; Nikolić Zora; Zorić Zoran; Prokić Bogomir Bolka; Ćupić-Miladinović Dejana

    2016-01-01

    The method of determining which animal species the bones, on the basis of mor­phological characteristics, belong to, is one of the most commonly used in forensic cases (poaching, fraud, theft, counterfeiting of food of animal origin).For identification of metacarpal bones (Ossa metacarpi) as well as finger articles (Ossa digitorum pedis seu phalanges digitorum) there were used distal parts of front limb bones, taken from 6 roe deers and 7 sheep. Afer the se...

  20. Determinants of residential electricity consumption: Using smart meter data to examine the effect of climate, building characteristics, appliance stock, and occupants' behavior

    International Nuclear Information System (INIS)

    Kavousian, Amir; Rajagopal, Ram; Fischer, Martin

    2013-01-01

    We propose a method to examine structural and behavioral determinants of residential electricity consumption, by developing separate models for daily maximum (peak) and minimum (idle) consumption. We apply our method on a data set of 1628 households' electricity consumption. The results show that weather, location and floor area are among the most important determinants of residential electricity consumption. In addition to these variables, number of refrigerators and entertainment devices (e.g., VCRs) are among the most important determinants of daily minimum consumption, while number of occupants and high-consumption appliances such as electric water heaters are the most significant determinants of daily maximum consumption. Installing double-pane windows and energy-efficient lights helped to reduce consumption, as did the energy-conscious use of electric heater. Acknowledging climate change as a motivation to save energy showed correlation with lower electricity consumption. Households with individuals over 55 or between 19 and 35 years old recorded lower electricity consumption, while pet owners showed higher consumption. Contrary to some previous studies, we observed no significant correlation between electricity consumption and income level, home ownership, or building age. Some otherwise energy-efficient features such as energy-efficient appliances, programmable thermostats, and insulation were correlated with slight increase in electricity consumption. - Highlights: • Weather, location and floor area are the most important determinants of residential electricity use. • Daily minimum and maximum are explained by different factors. • Number of refrigerators and entertainment devices explain daily minimum the best. • Number of occupants and high-consumption appliances explain daily maximum the best. • Other factors such as energy efficient features and household's socioeconomic status are examined

  1. Using conjoint analysis to determine the impact of product and user characteristics on acceptability of rectal microbicides for HIV prevention among Peruvian men who have sex with men.

    Science.gov (United States)

    Tang, Eric C; Galea, Jerome T; Kinsler, Janni J; Gonzales, Pedro; Sobieszczyk, Magdalena E; Sanchez, Jorge; Lama, Javier R

    2016-05-01

    Men who have sex with men (MSM) are in need of novel and acceptable HIV prevention interventions. In Peru, a Phase II clinical trial was recently completed evaluating rectally applied tenofovir gel among Peruvian MSM and transgender women. If deemed safe and acceptable, the product could move into efficacy testing, but acceptability data for similar products are needed now in order to prepare for future implementation. Peru is in need of expanded, national acceptability data among likely users. Using conjoint analysis of an online cross-sectional survey taken by 1008 Peruvian MSM and transgender women, we tested the acceptability of eight hypothetical rectal microbicide (RM) products comprising six, dual-value attributes. We also assessed the relationship of select product attributes with sample characteristics. Highest acceptability was found for a RM that was 90% effective, used before and after sex, without side effects, costing approximately $0.30, had no prescription requirement and had a single-use applicator. Product effectiveness and presence of side effects were the factors most likely to drive RM acceptance and use. Education, sexual orientation, sexual role and concern for HIV infection were also related to aspects of RM acceptability. RM acceptability was high, confirming the results of earlier, smaller studies and placing confidence in the acceptability of RMs. Analysis of the relationships with product attributes and sample characteristics underscore the need to consider the impact of factors such as sexual orientation, sexual role, level of education and concern for HIV acquisition on RM acceptability. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

  2. A stochastic model to determine the economic value of changing diagnostic test characteristics for identification of cattle for treatment of bovine respiratory disease.

    Science.gov (United States)

    Theurer, M E; White, B J; Larson, R L; Schroeder, T C

    2015-03-01

    Bovine respiratory disease is an economically important syndrome in the beef industry, and diagnostic accuracy is important for optimal disease management. The objective of this study was to determine whether improving diagnostic sensitivity or specificity was of greater economic value at varied levels of respiratory disease prevalence by using Monte Carlo simulation. Existing literature was used to populate model distributions of published sensitivity, specificity, and performance (ADG, carcass weight, yield grade, quality grade, and mortality risk) differences among calves based on clinical respiratory disease status. Data from multiple cattle feeding operations were used to generate true ranges of respiratory disease prevalence and associated mortality. Input variables were combined into a single model that calculated estimated net returns for animals by diagnostic category (true positive, false positive, false negative, and true negative) based on the prevalence, sensitivity, and specificity for each iteration. Net returns for each diagnostic category were multiplied by the proportion of animals in each diagnostic category to determine group profitability. Apparent prevalence was categorized into low (increasing specificity created more rapid, positive change in net returns than increasing sensitivity. Improvement of diagnostic specificity, perhaps through a confirmatory test interpreted in series or pen-level diagnostics, can increase diagnostic value more than improving sensitivity. Mortality risk was the primary driver for net returns. The results from this study are important for determining future research priorities to analyze diagnostic techniques for bovine respiratory disease and provide a novel way for modeling diagnostic tests.

  3. [Determination of markers from characteristic HPLC chromatogram of phenols in three official origins of Ephedrae Herba and quantitative analysis of four phenols].

    Science.gov (United States)

    Zuo, Xue; Hong, Hao; Zang, Xin-yu; Xu, Feng; Shang, Ming-ying; Wang, Xuan; Cai, Shao-qing

    2015-12-01

    This study is to establish the characteristic HPLC chromatogram of phenols in Ephedrae Herba, from which to pick out the marker peaks, followed by the analysis of the regularity of their distribution and content in the herbaceous stems of Ephedra sinica, E. intermedia and E. equisetina. The HPLC-DAD method for the characteristic chromatogram as well as quantitative analysis was established. The separation was carried out on a YMC-Pack ODS-A column (4.6 mm x 250 mm, 5 µm), eluted with the mobile phases as 0.01% formic acid aqueous solution (A) and acetonitrile (B) in a linear gradient (0-10 min, 17% B; 10-25 min, 17%-19% B; 25- 33 min, 19%-48% B; 33-35 min, 48%-51% B; 35-44 min, 51% B). The flow rate was kept at 1.0 mL · min⁻¹. The column tem- perature was 40 °C, and the detection wavelength was set at 350 nm (0-16 min) and 330 nm (16-44 min). Forty-six batches of collected samples from three official origins of Ephedrae Herba were detected, whose liquid chromatograms proven to be helpful to the differentiation of different origins. With principal component analysis and the analysis of distribution of peak area, twelve key peaks from the chromatogram were discussed in details on their contributions to the characteristics and differences of three official origins of the herb: peak area of peak 10, 11, 12 were found out to be significantly higher in E. equisetina than in other two origins, whose sum (higher than 146 mAU in E. equisetina) was useful for the discrimination between E. equisetina and the other two origins; peak area of 1 and 4 were respectively higher in E. sinica and E. intermedia than in other official origins, indicating their important effect on the differen- tiation of corresponding origins; peak 8 and 9 were picked out as two characteristic common peaks in three official origins of the herb, whose peak area showed little difference among different origins; further, peak area of other key peaks in the chromatogram also showed some difference

  4. Aerosol characteristics in Phimai, Thailand determined by continuous observation with a polarization sensitive Mie–Raman lidar and a sky radiometer

    International Nuclear Information System (INIS)

    Sugimoto, Nobuo; Shimizu, Atsushi; Nishizawa, Tomoaki; Matsui, Ichiro; Jin, Yoshitaka; Khatri, Pradeep; Irie, Hitoshi; Takamura, Tamio; Aoki, Kazuma; Thana, Boossarasiri

    2015-01-01

    Distributions and optical characteristics of aerosols were continuously observed with a polarization-sensitive (532 nm), Mie-scattering (532 and 1064 nm) and Raman-scattering (607 nm) lidar and a sky radiometer in Phimai, Thailand. Polarization lidar measurements indicated that high concentration plumes of spherical aerosols considered as biomass burning smoke were often observed in the dry season. Plumes of non-spherical aerosols considered as long-range transported soil dust from Africa, the Middle East, or Northeast Asia were occasionally observed. Furthermore, low-concentration non-spherical aerosols were almost always observed in the atmospheric mixing layer. Extinction coefficient profiles of spherical aerosols and non-spherical dust exhibited different diurnal variations, and spherical aerosols including smoke were distributed in higher altitudes in the mixing layer and residual layer. The difference can be explained by hygroscopic growth of smoke particles and buoyancy of the smoke. Analysis of seasonal variations of optical properties derived from the Raman lidar and the sky radiometer confirmed that the lidar ratio, aerosol optical depth, and Angstrom exponent were higher in the dry season (October–May) and lower in the wet season (June–September). The single scattering albedo was lower in the dry season. These seasonal variations are explained by frequent biomass burning in the dry season consistent with previous studies in Southeast Asian region. At the same time, the present work confirmed that soil dust was a major aerosol component in Phimai, Thailand. (letter)

  5. Application of method of volume averaging coupled with time resolved PIV to determine transport characteristics of turbulent flows in porous bed

    Science.gov (United States)

    Patil, Vishal; Liburdy, James

    2012-11-01

    Turbulent porous media flows are encountered in catalytic bed reactors and heat exchangers. Dispersion and mixing properties of these flows play an essential role in efficiency and performance. In an effort to understand these flows, pore scale time resolved PIV measurements in a refractive index matched porous bed were made. Pore Reynolds numbers, based on hydraulic diameter and pore average velocity, were varied from 400-4000. Jet-like flows and recirculation regions associated with large scale structures were found to exist. Coherent vortical structures which convect at approximately 0.8 times the pore average velocity were identified. These different flow regions exhibited different turbulent characteristics and hence contributed unequally to global transport properties of the bed. The heterogeneity present within a pore and also from pore to pore can be accounted for in estimating transport properties using the method of volume averaging. Eddy viscosity maps and mean velocity field maps, both obtained from PIV measurements, along with the method of volume averaging were used to predict the dispersion tensor versus Reynolds number. Asymptotic values of dispersion compare well to existing correlations. The role of molecular diffusion was explored by varying the Schmidt number and molecular diffusion was found to play an important role in tracer transport, especially in recirculation regions. Funding by NSF grant 0933857, Particulate and Multiphase Processing.

  6. Determination of Leacheability of U, Th and Heavy Metals of Water Leached Purification (WLP) Residue and Soil from Bauxite Mining Area using Toxicity Characteristic Leaching Technique

    International Nuclear Information System (INIS)

    Siti Aminah Omar; Suhaimi Hamzah; Shamsiah Abdul Rahman

    2016-01-01

    The study was conducted to analyse the leachability of U, Th and heavy metals Cu, Cd, As, Pb, Mn, Zn, Ba, Se, Cr and Fe of water leached purification (WLP) residue gathered from Lynas Malaysia Sdn Bhd and soil from bauxite mining area, Kuantan. Their toxicity was assessed using the toxicity characteristic leaching procedure (TCLP) developed by the United States Environmental Protection Agency. The concentration of the elements studied was analysed using inductively coupled plasma mass spectrometry (ICP-MS). Results from the analysis indicated that the concentrations for all the elements studied in this project are well below than the TCLP regulatory limit. The concentrations of U and Th in leached solution were between 0.01 - 0.20 Bq/ kg. The concentrations of the multi elements were mostly between 0.02 - 1471 μg/ l, but certain elements such as Fe had concentration as high as 4707 μg/ l. Hence, it can be concluded that the WLP residue from Lynas and soil from bauxite mining area are very stable in the environment and does not pose any environmental problem. (author)

  7. Utilizing QFD model to determine quality characteristics of the products and priority needs of customers in the medical industry products (Case Study: Plasma seat product in mashhad`s Sahateb medical equipment company

    Directory of Open Access Journals (Sweden)

    Zeinab Armoun

    2012-10-01

    Full Text Available Quality Function Deployment (QFD as one of the quality engineering methods; originates from market study and product or service customers identification, where by determining their needs; tries to involve them in all stages of product or service development. This study uses QFD method to apply customers’ criteria in production of Coach Plasma in Mashhad`s Sahateb Company. Coach Plasma is used for healthy bloodletting. The proposed study of this paper designed and distributed a questionnaire, which includes identification & determination of customers’ needs and investigation of their satisfaction of manufactured products, while looking for technical and engineering characteristics related to their needs. The Coach Plasma costumers are categorized into two groups of local and external customers. Data collection was done based on available documents, experts opinions, structured interview with managers and questionnaire. Customers’ needs were studied in QFD teams. Collecting essential information such as needs importance degree and competitive benchmarking of customer`s needs, the weight of each need has been evaluated. In this research, House of Quality was used from first matrix of QFD leading to estimation of engineering & technical characteristics in order to enter to the quality deployment matrix. Take a look at obtained results, we could mention the role of each of these external factors in satisfaction of Sahateb Company customers and technical characteristics of the company in providing these factors and the prioritization of the customer's needs.

  8. Construction and performance characteristics of polymeric membrane electrode and coated graphite electrode for the selective determination of Fe³⁺ ion.

    Science.gov (United States)

    Bandi, Koteswara Rao; Singh, Ashok K; Upadhyay, Anjali

    2014-03-01

    Novel Fe(3+) ion-selective polymeric membrane electrodes (PMEs) were prepared using three different ionophores N-(4-(dimethylamino)benzylidene)thiazol-2-amine [L1], 5-((3-methylthiophene-2yl) methyleneamino)-1,3,4-thiadiazole-2-thiol [L2] and N-((3-methylthiophene-2yl)methylene)thiazol-2-amine [L3] and their potentiometric characteristics were discussed. Effect of various plasticizers and anion excluders was also studied in detail and improved performance was observed. The best performance was obtained for the membrane electrode having a composition of L2:PVC:o-NPOE:NaTPB as 3:38.5:56:2.5 (w/w; mg). A coated graphite electrode (CGE) was also prepared with the same composition and compared. CGE is found to perform better as it shows a wider working concentration range of 8.3×10(-8)-1.0×10(-1)molL(-1), a lower detection limit of 2.3×10(-8)molL(-1), and a near Nernstian slope of 19.5 ± 0.4 mVdecade(-1) of activity with a response time of 10s. The CGE shows a shelf life of 6 weeks and in view of high selectivity, it can be used to quantify Fe(3+) ion in water, soil, vegetable and medicinal plants. It can also be used as an indicator electrode in potentiometric titration of EDTA with Fe(3+) ion. Copyright © 2013. Published by Elsevier B.V.

  9. Compartmentalized beta subunit distribution determines characteristics and ethanol sensitivity of somatic, dendritic, and terminal large-conductance calcium-activated potassium channels in the rat central nervous system.

    Science.gov (United States)

    Wynne, P M; Puig, S I; Martin, G E; Treistman, S N

    2009-06-01

    Neurons are highly differentiated and polarized cells, whose various functions depend upon the compartmentalization of ion channels. The rat hypothalamic-neurohypophysial system (HNS), in which cell bodies and dendrites reside in the hypothalamus, physically separated from their nerve terminals in the neurohypophysis, provides a particularly powerful preparation in which to study the distribution and regional properties of ion channel proteins. Using electrophysiological and immunohistochemical techniques, we characterized the large-conductance calcium-activated potassium (BK) channel in each of the three primary compartments (soma, dendrite, and terminal) of HNS neurons. We found that dendritic BK channels, in common with somatic channels but in contrast to nerve terminal channels, are insensitive to iberiotoxin. Furthermore, analysis of dendritic BK channel gating kinetics indicates that they, like somatic channels, have fast activation kinetics, in contrast to the slow gating of terminal channels. Dendritic and somatic channels are also more sensitive to calcium and have a greater conductance than terminal channels. Finally, although terminal BK channels are highly potentiated by ethanol, somatic and dendritic channels are insensitive to the drug. The biophysical and pharmacological properties of somatic and dendritic versus nerve terminal channels are consistent with the characteristics of exogenously expressed alphabeta1 versus alphabeta4 channels, respectively. Therefore, one possible explanation for our findings is a selective distribution of auxiliary beta1 subunits to the somatic and dendritic compartments and beta4 to the terminal compartment. This hypothesis is supported immunohistochemically by the appearance of distinct punctate beta1 or beta4 channel clusters in the membrane of somatic and dendritic or nerve terminal compartments, respectively.

  10. The determination of the pore distribution and the consideration of methods leading to the prediction of retention characteristics of membrane filters

    International Nuclear Information System (INIS)

    Badenhop, C.T.

    1983-01-01

    Presented here is a method for the determination of the pore size distribution of a membrane microfilter. Existing test metods are either cumbersome, as is the Erbe method; time consuming, as is the evaluation of electron microscope photographs; do not really measure the pore distribution, as the mercury intrusion method; or do not satisfactorily evaluate the large pore range of the filter, as is the case with the automated ASTM method. The new method described in this paper is based upon the solution of the integral flow equation for the pore distribution function. A computer program evaluates the flow test data and calculates the numerical pore distribution, water-flow distribution, air-flow distribution and capillary area distribution, as a function of the pore size. (orig./RW)

  11. Discharge on boiling in a channel: effect of channel geometry on the performance characteristics of determining metals in a liquid flow by atomic emission spectrometry

    International Nuclear Information System (INIS)

    Zuev, B.K.; Yagov, V.V.; Grachev, A.S.

    2006-01-01

    Discharge on boiling in a channel was studied as a new atomization and excitation source for spectrochemical analysis in a flow of electrolyte solutions. The discharge arises between the liquid walls of a vapor lock formed in the channel of a dielectric membrane because of the rapid Joule heating of the liquid in the channel. The effect of channel geometry on the reproducibility of the integrated light intensity was studied. The background radiation spectrum was measured over the range 220-900 nm, and the possibility of determining alkali and alkaline earth metals in a flow was studied. The parameters of linear calibration equations and the detection limits for these metals are given [ru

  12. Application of general methods for the study of porous materials to the determination of the characteristics of barriers; Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres

    Energy Technology Data Exchange (ETDEWEB)

    Plurien, P; Charpin, J; Mommejac, S [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-07-01

    Barriers foreseen for the separation of uranium isotopes by gaseous diffusion must posses pores of about 100 Angstrom radius and as high an output as possible. They should thus be of small but uniform thickness. In view of these conditions it is necessary to adapt the normal methods available for studying porous materials in order to check the characteristics of the prototypes examined. It has been found that only by cross-comparison of data from various methods can progress in the development of different prototypes be followed. The following account consists of two parts: 1) A review of the main experimental methods we have used: a) various absorption methods, b) electron microscopy, c) X-ray studies, d) mercury porosimetry, e) liquid permeability, f) gas permeability, g) measurement of separation efficiency. 2) Comparison of the results obtained using these various methods and their application with a view to acquiring as complete a knowledge as possible of the structure of the barrier. (author) [French] Les barrieres susceptibles d'etre utilisees pour la separation des isotopes de l'uranium, par diffusion gazeuse, doivent presenter des pores de rayon de l'ordre de 100 Angstrom et un debit aussi grand que possible. Elles doivent donc avoir une epaisseur faible et constante. Ces conditions necessitent une adaptation des methodes usuelles d'etude des corps poreux pour controler les caracteristiques des prototypes etudies. Il est apparu que seul le recoupement entre diverses methodes permet de suivre les progres dans la realisation de differents prototypes. L'expose qui va suivre comprend deux parties: 1) Une revue des principales methodes experimentales que nous utilisons: a) differentes methodes d'absorption, b) microscopie electronique, c) rayons X, d) porosimetrie a mercure, e) permeabilite aux liquides, f) permeabilite aux gaz, g) mesure de l'efficacite de separation. 2) Comparaison des differents resultats obtenus par ces diverses methodes et leur application

  13. Determination of space charge region width and diffusion length in Cu(In,Ga)(S,Se)2 absorber from solar cell spectral characteristic

    International Nuclear Information System (INIS)

    Tivanov, M.; Mazanik, A.; Drozdov, N.; Zaretskaya, E.

    2010-01-01

    Full text : The space-charge region width and diffusion length of minority charge carriers in the base region (Cu(In,Ga)(S,Se) 2 absorber) are the most important parameters of the solar cell. These parameters determine the efficiency of a solar cell therefore the problem of their control is essential. In this work it is present simple non-destructive method of extracting the parameters of Cu(In,Ga)(S,Se) 2 -based solar cell (space-charge region width and diffusion length of minority charge carriers in Cu(In,Ga)(S,Se) 2 absorber) from the analysis of solar cell spectral photoresponse. The method is based on one-dimensional model of a solar cell and on the change of in-depth distribution of the photogenerated carriers in the solar cell and, hence, on the change of its photoresponse with the wave-length variation. The following assumptions are accepted: the reflection of charge carriers from a back contact and the ''drawing'' field in the quasi-neutral area of the absorber layers are absent, window and buffer layers are transparent in the analyzed part of photoresponse spectrum, the injection level of minority charge carriers is low, the recombination losses at the metallurgical p-n-junction interface of the studied photosensitive structure linearly depend on the photocurrent density. For the calculation it is necessary to obtain the following set of the experimental data: the spectral density of incident radiation, the spectral dependence of photocurrent or photovoltage of the studied photosensitive structure, the spectral dependences of optical absorption coefficient and reflectance.

  14. A Novel Algorithm for Determining the Contextual Characteristics of Movement Behaviors by Combining Accelerometer Features and Wireless Beacons: Development and Implementation.

    Science.gov (United States)

    Magistro, Daniele; Sessa, Salvatore; Kingsnorth, Andrew P; Loveday, Adam; Simeone, Alessandro; Zecca, Massimiliano; Esliger, Dale W

    2018-04-20

    Unfortunately, global efforts to promote "how much" physical activity people should be undertaking have been largely unsuccessful. Given the difficulty of achieving a sustained lifestyle behavior change, many scientists are reexamining their approaches. One such approach is to focus on understanding the context of the lifestyle behavior (ie, where, when, and with whom) with a view to identifying promising intervention targets. The aim of this study was to develop and implement an innovative algorithm to determine "where" physical activity occurs using proximity sensors coupled with a widely used physical activity monitor. A total of 19 Bluetooth beacons were placed in fixed locations within a multilevel, mixed-use building. In addition, 4 receiver-mode sensors were fitted to the wrists of a roving technician who moved throughout the building. The experiment was divided into 4 trials with different walking speeds and dwelling times. The data were analyzed using an original and innovative algorithm based on graph generation and Bayesian filters. Linear regression models revealed significant correlations between beacon-derived location and ground-truth tracking time, with intraclass correlations suggesting a high goodness of fit (R 2 =.9780). The algorithm reliably predicted indoor location, and the robustness of the algorithm improved with a longer dwelling time (>100 s; error location of an individual within an indoor environment. This novel implementation of "context sensing" will facilitate a wealth of new research questions on promoting healthy behavior change, the optimization of patient care, and efficient health care planning (eg, patient-clinician flow, patient-clinician interaction). ©Daniele Magistro, Salvatore Sessa, Andrew P Kingsnorth, Adam Loveday, Alessandro Simeone, Massimiliano Zecca, Dale W Esliger. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 20.04.2018.

  15. Determination of the Quantitative Characteristics of the Engine of a Household Power Plant when Using Generator Gas as an Alternative Fuel

    Directory of Open Access Journals (Sweden)

    Plotnikov S. A.

    2017-08-01

    Full Text Available The relevance of the study is due to the need to study the feasibility of replacing traditional fuel with alternative types (generator gas when using a household power plant. The purpose of the study is to obtain the value of a small-displacement engine GG-2700 with a working volume of 1563 cm3 when it works on commercial fuel (gasoline and generator gas. For this purpose, the authors developed an experimental setup on the basis of a small-sized household power station with fixation of variable parameters on a personal computer and a graphical representation of the measurement results. The records of the indicator diagrams allowed determining the burning time of various fuels. As a result, for the first time, there were obtained quantitative indicators of fuel efficiency and toxicity of exhaust gases of the small-displacement engine GG-2700 with a working volume of 1563 cm3 when using commercial fuel (gasoline and generator gas. The analysis of the data showed an increase in the specific consumption of generator gas in comparison with gasoline from 34.6% to 50.4% and a decrease in the content of toxic components in the exhaust gases: carbon monoxide (CO – in 1.05 ... 1.25 times, hydrocarbons (CxHy - in 1,1 ... 1,39 times, nitrogen oxides (NOх - in 3,9 ... 5,7 times. The obtained results prove the expediency of using generator gas as an alternative fuel for the engine of a household power plant.

  16. Preparation and determination of the luminescent characteristics of ZrO{sub 2} in powder; Preparacion y determinacion de las caracteristicas luminiscentes del ZrO{sub 2} en polvo

    Energy Technology Data Exchange (ETDEWEB)

    Rivera M, T. [ESIME-IPN Unidad Culhuacan Mexico D.F. (Mexico); Olvera T, L.; Azorin N, J.; Soto E, A.M.; Velazquez O, C.; Campero C, A. [UAM-I, 09340 Mexico D.F. (Mexico)

    2004-07-01

    In this work the luminescent characteristics of the ZrO{sub 2} are presented using the method of Thermally Stimulated Luminescence (TSL), also called thermoluminescence (Tl). The powders of ZrO{sub 2} were obtained by two preparation methods: for precipitation and for evaporation of Sol-gel. The luminescent characteristics of the ZrO{sub 2} are determined using a lamp of radiation of UV light and a radiation source of beta particles of {sup 90}Sr/{sup 90}Y. Using the method of thermal stimulation the curve representative thermoluminescent of the previously irradiated material was obtained. The curve Tl of the ZrO{sub 2} irradiated with UV light presents a maximum in 180 C. Likewise, the spectrum of the curve Tl of the ZrO{sub 2} irradiated with particles beta presents a maximum centered in 181 C. While using gamma radiation like excitement source one has a spectrum with a peak centered in 184 C. When subjecting the materials obtained by sol-gel to a process of calcination at 1000 C for 24 hours a curved Tl it presents with two maxim in 185 and in 290 C respectively. The intensity of the response induced in the material it is a decisive factor to continue studying the dosimetric characteristics of the ZrO{sub 2} what allows to consider it as a potential material to use it in the beta particle dosimetry and of the UV light using the thermoluminescence method (Tl). (Author)

  17. Wave characteristics off Visakhapatnam coast during a cyclone

    Digital Repository Service at National Institute of Oceanography (India)

    SanilKumar, V.; AshokKumar, K.; Raju, N.S.N.

    CURRENT SCIENC E, VOL. 86, NO. 11, 10 JUNE 2004 *For correspondence. (e - mail: sanil@darya.nio.org) Wave characteristics off Visakhapatnam coast du r ing a cyclone V. Sanil Kumar*, K. Ashok Kumar and N. S. N. Raju Ocean Engineering Division.... Wave period The variation of average wave period ( T 02 ), period corr e- sponding to maximum wave height ( T H max ) and wave p e- riod corresponding to maximum spectral energy ( T p ) during the observation period are shown in Figure 4. Du r- i ng...

  18. Determination of characteristics maximal runoff Mountain Rivers

    African Journals Online (AJOL)

    Ovcharuk V and Todorova O

    Odessa State Environmental University, Ukraine. Received: 03 December 2015 / Accepted: 23 April 2016 / Published online: 01 May 2016. ABSTRACT. This article has been examined maximum runoff of the rivers of the Crimean Mountains. The rivers flow through the western and eastern part of the northern slope Crimean ...

  19. Determination of acoustic characteristics of pipe cavitation

    International Nuclear Information System (INIS)

    Loof, J.-P. de; Leducq, Daniel

    1979-01-01

    The subject of this report is an experimental investigation of cavitation as a source of noise within the audible and dangerous frequency ranges for industrial plant and equipment. The first results showed the noise-generating process to be comparable to that of a shock wave developing immediately after the cavitation area, propagating at very close to flow velocity and dying-down after a length equivalent to two or three diameters. Most of the energy is concentrated in the low-frequency range of the spectrum (i.e. up to 200 Hz) [fr

  20. Determination of Fe-55 and Ni-63 in Environmental Samples. Analytical Problems. Characteristic Limits. Automatized Calculation; Determinacion de 55{sup F}e y 63{sup N}i en Muestras Ambientales. Problemas Analiticos. Limites Caracteristicos. Calculo Automatizado

    Energy Technology Data Exchange (ETDEWEB)

    Gasco, C; Navarro, N; Gonzalez, P; Heras, M C; Gapan, M P; Alonso, C; Calderon, A; Sanchez, D; Morante, R; Fernandez, M; Gajate, A; Alvarez, A

    2008-08-06

    The Department of Vigilance Radiologica y Radiactividad Ambiental from CIEMAT has developed an appropriate analytical methodology for Fe-55 and Ni-63 sequential determination in environmental samples based on the procedure used by RIS0 Laboratories. The experimental results obtained in the mayor and minor elements behaviour (soil and air constituents) in the different types of resins used for separating Fe-55 and Ni-63 are showed in this report. The measuring method of both isotopes by scintillation counting has been optimized with Ultima Gold liquid with different concentrations of stable element Fe and Ni. The decontamination factors of different gamma-emitters are experimentally determined in this method with the presence of soil matrix. The Fe-55 and Ni-63 activity concentrations and their associated uncertainties have been calculated from the counting data and sample preparation. A computer application has been implemented in Visual Basic in excel sheets for: (I) obtaining the counting data from spectrometer and counts in each window, (II) representing graphically the background and sample spectrums, (III) determining the activity concentration and its associated uncertainty and (IV) calculating the characteristic limits using ISO 11929 (2007) with various confidence levels. (Author) 30 refs.

  1. Determination of the specific site occupation of rare earth additions in Y17SM06Lu07Fe5O12 thin films by the orientation dependence of characteristic x-ray emissions

    International Nuclear Information System (INIS)

    Krishnan, K.M.; Rez, P.; Mishra, R.; Thomas, G.

    1983-11-01

    The orientation dependence of characteristic x-ray emissions have been used to determine specific site occupations of Rare Earth additions in epitaxially grown films of Y 1 7 Sm 0 6 Lu 0 7 Fe 5 O 12 . A theoretical formulation based on the assumption of highly localized inner shell excitations was used not only to predict specific site sensitive orientations, but also to refine experimentally observed data employing a constrained least squares analysis to give probabilities for the occupation of the RE additions in the different crystallographic sites. Thus, it has been shown that in this compound the preference for the RE additions is a predominantly octahedral occupation with a probability greater than or equal to 95%. Some of the assumptions and limitations of the technique have also been discussed

  2. UPLC柱前衍生法分析小黄鱼中生物胺%Determination of Biogenic Amines in Small Yellow Croakers by UPLC with Precolumn Dansylations and Analysis of the Characteristic Biogenic Amines

    Institute of Scientific and Technical Information of China (English)

    郭慧; 刘晓琴; 晁鲁平; 蒋益虹

    2017-01-01

    Objective:To analyze the changes of biogenic amines and characteristic BAs in small yellow croakers.Methods:UPLC with UV detection was used to detect the content of 8 biogenic amines (BAs) including tyramine (Tyr),2-phenylethylamine(2-Phe),putrescine (Put),cadaverine (Cad),histamine (His),tryptamine (Try),spermine (Spm) and spermidine (Spd) in the small yellow croaker samples.Through the correlation between freshness index and biogenic amines,we determined the characteristic biogenic amines in small yellow croakers.The results showed that:TVC,TVB-N and biogenic amine contents increased significantly during storage.The contents of Put,Cad,His and Tyr were very high and they were significantly associated with the changes of TVC and TVB-N.Conclusion:Put,Cad and Tyr were determined to be characteristic BAs in small yellow croakers.%目的:研究非鲭科鱼类小黄鱼贮藏过程中生物胺变化规律及其特征生物胺.方法:采用丹酰氯柱前衍生UPLC方法检测鱼肉中的生物胺含量,通过分析菌落总数(TVC)、挥发性盐基氮(TVB-N)与主要生物胺的相关性,确定小黄鱼的特征生物胺.结果:随时间的延长,小黄鱼贮藏过程中TVC、TVB-N、生物胺含量均有所增加,且温度越高变化越剧烈;贮藏过程中小黄鱼的主要生物胺是腐胺、尸胺、酪胺、组胺,其变化与TVC、TVB-N相关性极高.结论:小黄鱼腐败过程中的特征生物胺是腐胺、尸胺、酪胺,建议其作为小黄鱼质量评价的参考指标.

  3. Comparative characteristics of metacarpal bones (Ossa metacarpi and finger articles (Ossa digitorum pedis seu phalanges digitorum of roe deer (Capreolus capreolus and sheep (Ovis aries in order to determine animal species

    Directory of Open Access Journals (Sweden)

    Blagojević Miloš

    2016-01-01

    Full Text Available The method of determining which animal species the bones, on the basis of mor­phological characteristics, belong to, is one of the most commonly used in forensic cases (poaching, fraud, theft, counterfeiting of food of animal origin.For identification of metacarpal bones (Ossa metacarpi as well as finger articles (Ossa digitorum pedis seu phalanges digitorum there were used distal parts of front limb bones, taken from 6 roe deers and 7 sheep. Afer the separation from the soft tissues, the bones were boiled in an autoclave, and for bleaching and degreasing they were kept in 3% solution of hydrogen peroxide (H2O2. The bones were air dried, and then photographed. In roe deer, there are four developed metacarpal bones: the second, the third, the fourth and the fifth. The third and the fourth mrtacarpal bones form one bone, named the main metacarpal bone. The second and the fifth metacarpal bones are connected by con­nective tissue to distal parts of the third and the fourth metacarpal bones. In sheep, there are three developed metacarpal bones: the third, the fourth and the fifth. The thord and the fourth metacarpal bones are, as in roe deer, grown together along the entire length, forming in that way one single bone - the main metacarpal bone. On the distal part of front limb in roe deer there are four fingers, and in sheep two. In roe deer the second, the third, the fourth and the fifth finger are developed, and in sheep, the third and the fourth. Each finger of front limbs, both in roe deer and in sheep, consists of three articles: Phalanx proximalis, Phalanx media i Phalanx distalis. In the case of certain bone missing, a roe deer can be distinguished from a sheep on the basis of the tird article of the third and fourth finger, which is of characteristic appearance. Plantar edge in roe deer is peaked, and in sheep it is blunt. The method of determining which animal species the bones, on the basis of mor­phological characteristics of roe deer

  4. Mathematical model to determine the dimensions of superconducting cylindrical coils with a given central field – the case study for MgB{sub 2} conductors with isotropic I{sub c}(B) characteristic

    Energy Technology Data Exchange (ETDEWEB)

    Pitel, Jozef, E-mail: jozef.pitel@savba.sk [Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská 9, 841 04 Bratislava (Slovakia); Melišek, Tibor [Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská 9, 841 04 Bratislava (Slovakia); Tropeano, Matteo; Nardelli, Davide; Tumino, Andrea [Columbus Superconductors, Via delle Terre Rosse 30, I-16133 Genova (Italy)

    2016-08-15

    Highlights: • Influence of the winding geometry on central field of cylindrical coils is studied. • Procedure to determine dimensions of coils with a given central field is developed. • The model is applied to MgB{sub 2}/Ni/Cu conductors with isotropic I{sub c}(B) characteristic. • Influence of the thickness of stabilizing copper on coil parameters is analyzed. • Optimization with respect to coil operating current and wire length is discussed. - Abstract: In this work, we present a mathematical model which enables to design cylindrical coils with a given central field, made of the superconducting conductor with isotropic I{sub c}(B) characteristic. The model results in a computer code that enables to find out the coil dimensions, and to calculate the coil parameters such as critical current, maximum field in the winding and field non-uniformity on the coil axis. The I{sub c}(B) characteristic of the conductor is represented by the set of data measured in discrete points. This approach allows us to express the I{sub c}(B) as a function linearized in parts. Then, it is possible to involve the central field of the coil, coil dimensions, and parameters of the conductor, including its I{sub c}(B) characteristic, in one equation which can be solved using ordinary numerical non-linear methods. Since the coil dimensions and conductor parameters are mutually linked in one equation with respect to a given coil central field, it is possible to analyze an influence of one parameter on the other one. The model was applied to three commercially available MgB{sub 2}/Ni/Cu conductors produced by Columbus Superconductors. The results of simulations with the I{sub c}(B) data at 20 K illustrate that there exists a set of winding geometries that generate a required central field, changing from a disc shape to long thin solenoid. Further, we analyze how the thickness of stabilizing copper influences the coil dimensions, overall conductor length, coil critical current, maximum

  5. An Initial Review of the Characteristics and Determinants of Female Entrepreneurs in Puerto Rico Características y determinantes de mujeres empresarias en Puerto Rico: una mirada inicial

    Directory of Open Access Journals (Sweden)

    Marisela Santiago Castro

    2013-10-01

    Full Text Available This paper outlines the characteristics and determinants of Puerto Rican female entrepreneurs in 2007.  This study utilizes data from the Adult Population Survey (APS for 2007 from the Global Entrepreneurship Monitor (GEM Project.  We find that female entrepreneurs in Puerto Rico are most likely sole owners of their business establishment, face many local competitors, and do not generally export their goods or services outside of the Island. The primary motivation for business start-up was business opportunism along with a personal goal of greater independence at the workplace.  Education serves as a fundamental determinant of female entrepreneurship. Este artículo describe las características y determinantes de mujeres empresarias en Puerto Rico para el 2007. El estudio utiliza los datos de la Encuesta de la Población Adulta del Proyecto de Global Entrepreneurship Monitor (GEM, por sus siglas en inglés. Se encontró que las mujeres empresarias en Puerto Rico tienden a ser dueñas únicas de sus negocios, tienen muchos competidores locales, y usualmente no exportan sus bienes o servicios fuera de la Isla. La motivación primaria para empezar el negocio fue tener una oportunidad de negocio junto a una meta personal de mayor independencia en el lugar de trabajo. La educación es un determinante fundamental de ser empresaria en Puerto Rico.

  6. Strong correlation between Jc(T, H||c) and Jc(77 K, 3 T||c) in Zr-added (Gd, Y)BaCuO coated conductors at temperatures from 77 down to 20 K and fields up to 9 T

    International Nuclear Information System (INIS)

    Xu, A; Delgado, L; Heydari Gharahcheshmeh, M; Khatri, N; Liu, Y; Selvamanickam, V

    2015-01-01

    We have conducted a critical current density J c (T, H) study over a wide temperature T from 77 down to 20 K and a magnetic field H up to 9 T on more than 50 ∼ 0.9 μm-thick REBa 2 Cu 3 O 7−δ (RE = rare earth) thin films containing different concentrations of BaZrO 3 (BZO). We found that, independent of the composition, there is a linear correlation between J c (77 K, 3 T||c) and J c (T, H||c) at T down to 20 K and H up to 9 T. Moreover, J c (77 K, 3 T||c) is also linearly correlated to J c (T, H||ab) below 40 K. We ascribed this linear correlation to the dominant pinning source of BZO nanorods, which act as a strong correlated pinning at T above ∼30 K and provide weak uncorrelated point pins at lower temperatures. Our result emphasizes that J c (77 K, 3 T||c) is a key metric for metal-organic chemical vapor deposited REBa 2 Cu 3 O 7−δ coated conductors. (fast track communication)

  7. Thermal characteristics of combined thermoelectric generator and refrigeration cycle

    International Nuclear Information System (INIS)

    Yilbas, Bekir S.; Sahin, Ahmet Z.

    2014-01-01

    Highlights: • TEM location in between the evaporator and condenser results in low coefficient of performance. • TEM location in between condenser and its ambient improves coefficient of performance of the combined system. • High temperature ratio enhances coefficient of performance of combined system. • Certain values of parameters enhance combined system performance. - Abstract: A combined thermal system consisting of a thermoelectric generator and a refrigerator is considered and the effect of location of the thermoelectric generator, in the refrigeration cycle, on the performance characteristics of the combined system is investigated. The operating conditions and their influence on coefficient of performance of the combined system are examined through introducing the dimensionless parameters, such as λ(λ = Q HTE /Q H , where Q HTE is heat transfer to the thermoelectric generator from the condenser, Q H is the total heat transfer from the condenser to its ambient), temperature ratio (θ L = T L /T H , where T L is the evaporator temperature and T H is the condenser temperature), r C (r C = C L /C H , where C L is the thermal capacitance due to heat transfer to evaporator and C H , is the thermal capacitance due to heat rejected from the condenser), θ W (θ W = T W /T H , where T W is the ambient temperature), θ C (θ C = T C /T H , where T C is the cold space temperature). It is found that the location of the thermoelectric generator in between the condenser and the evaporator decreases coefficient of performance of the combined system. Alternatively, the location of thermoelectric device in between the condenser and its ambient enhances coefficient of performance of the combined system. The operating parameters has significant effect on the performance characteristics of the combined system; in which case temperature ratio (θ L ) within the range of 0.68–0.70, r C = 2.5, θ W = 0.85, and θ C = 0.8 improve coefficient of performance of the

  8. Position automatic determination technology

    International Nuclear Information System (INIS)

    1985-10-01

    This book tells of method of position determination and characteristic, control method of position determination and point of design, point of sensor choice for position detector, position determination of digital control system, application of clutch break in high frequency position determination, automation technique of position determination, position determination by electromagnetic clutch and break, air cylinder, cam and solenoid, stop position control of automatic guide vehicle, stacker crane and automatic transfer control.

  9. Determinação da curva característica de um painel fotovoltaico em condições reais de trabalho = Determination of the characteristic curve of a photovoltaic panel in real conditions of work

    Directory of Open Access Journals (Sweden)

    Estor Gnoatto

    2005-07-01

    Full Text Available No presente trabalho foi desenvolvido um estudo sobre um sistemafotovoltaico autônomo, com armazenamento de energia, instalado na Estação Experimental Agrometeorológica da Universidade Estadual do Oeste do Paraná, Estado do Paraná, Campus Cascavel, a uma latitude 24º 59’ Sul, longitude de 53º 26’ Oeste, com altitude de 682 metros, sob condições reais de campo, durante o ano de 2002. Foi determinada a curva característica do painel, utilizando uma aquisição de dados um "micrologger" da Campbell Scientific-INC modelo CR10X, programado para realizar uma leitura por segundo de cada canal e armazenar a média aritmética de cinco minutos dos dados das componentes detemperatura de operação do painel; tensão e corrente do sistema fotovoltaico. Baseando-se nesses dados pode-se determinar que a curva característica do painel em condições reais de campo apresenta uma perda de 24% em seu rendimento em relação ao padrão STC (condições padrão de teste.The purpose of the present work was to develop the study of anautonomous photovoltaic system, with storage of energy, installed in the Agrometeorological Experimental Station of Universidade Estadual do Oeste do Paraná, State of Paraná, Campus Cascavel, at 24º 59’ latitude south, 53º26 longitude west, 682 meters of altitude, under real field conditions, during the year 2002. Efficacy of the photovoltaic panels has been evaluated under real field conditions, as well as to determine its characteristic linear fit. A 'micrologger' Campbell Scientific-INC model CR10X was used to acquire data, and it was programmed to accomplish a reading per second in each channel and to store the arithmetic average of data from five minutes of operational temperature of the panel, photovoltaic system tension and current. According to results, it could determined that the panel characteristic linear fit in real field conditions shows 24% less field than standard STC (Standard Test Conditions.

  10. Synthesis and Characteristics of HgCdSe for IR Detection

    Science.gov (United States)

    2014-03-11

    HgCdSe layers. Positron annihilation spectroscopy measurements were carried out. These suggest the presence of p-type mercury vacancies in Hg1-xCdxSe...Photoelectron Spectroscopy Study of Oxide Removal Using Atomic Hydrogen for Large-Area II–VI Material Growth, Journal of Electronic Materials... Applications ,” K. Doyle, G. Brill, Y. Chen, T. H. Myers, S. Trivedi. 2012 SPIE Conference, San Diego CA (August 2012) “Determination of critical

  11. Flight Investigation to Determine the Effect of Jet Exhaust on Drag, Trim Characteristics, and Afterbody Pressures of a 0.125-Scale Rocket Model of the Mcdonnell F-101A Airplane

    Science.gov (United States)

    Kennedy, Thomas L.

    1956-01-01

    A flight investigation was conducted to determine the effect of jet exhaust on the drag, trim characteristics, and afterbody pressures on a 0.125-scale rocket model of the McDonnell F-101A airplance. Power-off data were obtained over a Mach number range of 1.04 to 1.9 and power-on data were obtained at a Mach number of about 1.5. The data indicated that with power-on the change in external drag coefficient was within the data accuracy and there was a decrease in trim angle of attack of 1.27 degrees with a corresponding decrease of 0.07 in lift coefficient. Correspondingly, pressure coefficients on the side and bottom of the fuselage indicated a positive increment near the jet exit. As the distance downstream of the jet exit increased, the increment on the bottom of the fuselage increased, whereas the increments on the side decreased to a negative peak.

  12. Associated Higgs Boson Top-Quark production channel $t\\bar tH \\rightarrow l^{\\pm}l^{\\pm}+{\\tau_\\textrm{had}}$ at $\\sqrt{13}$ TeV with the ATLAS experiment

    CERN Document Server

    Ali, Babar; The ATLAS collaboration

    2016-01-01

    The measurement of the associated production of a Higgs boson with a pair of top quarks is a direct determination of the top-Yukawa coupling at tree-level, which can be compared with the indirect determination in the loop-production in gluon-gluon fusion. The decay channel of the system with several leptons (multi-lepton channel), and jets, gives high sensitivity. The focus of the analysis is the sub-channel with two same-sign light leptons (electrons or muons) and a hadronically decaying tau lepton: $\\rm ttH \\rightarrow 2\\ell + 1 \\tau_{had}$. In particular the background estimate from top-antitop reactions is discussed. The analysis uses the data set recorded by ATLAS from LHC Run-II during 2015 and 2016 at $\\sqrt{13}$ TeV proton-proton collisions.

  13. Differentiation between microcystin contaminated and uncontaminated fish by determination of unconjugated MCs using an ELISA anti-Adda test based on receiver-operating characteristic curves threshold values: application to Tinca tinca from natural ponds.

    Science.gov (United States)

    Moreno, Isabel María; Herrador, M Ángeles; Atencio, Loyda; Puerto, María; González, A Gustavo; Cameán, Ana María

    2011-02-01

    The aim of this study was to evaluate whether the enzyme-linked immunosorbent assay (ELISA) anti-Adda technique could be used to monitor free microcystins (MCs) in biological samples from fish naturally exposed to toxic cyanobacteria by using receiver operating characteristic (ROC) curve software to establish an optimal cut-off value for MCs. The cut-off value determined by ROC curve analysis in tench (Tinca tinca) exposed to MCs under laboratory conditions by ROC curve analysis was 5.90-μg MCs/kg tissue dry weight (d.w.) with a sensitivity of 93.3%. This value was applied in fish samples from natural ponds (Extremadura, Spain) in order to asses its potential MCs bioaccumulation by classifying samples as either true positive (TP), false positive (FP), true negative (TN), or false negative (FN). In this work, it has been demonstrated that toxic cyanobacteria, mainly Microcystis aeruginosa, Aphanizomenon issatchenkoi, and Anabaena spiroides, were present in two of these ponds, Barruecos de Abajo (BDown) and Barruecos de Arriba (BUp). The MCs levels were detected in waters from both ponds with an anti-MC-LR ELISA immunoassay and were of similar values (between 3.8-6.5-μg MC-LR equivalent/L in BDown pond and 4.8-6.0-μg MC-LR equivalent/L in BUp). The MCs cut-off values were applied in livers from fish collected from these two ponds using the ELISA anti-Adda technique. A total of 83% of samples from BDown pond and only 42% from BUp were TP with values of free MCs higher than 8.8-μg MCs/kg tissue (d.w.). Copyright © 2009 Wiley Periodicals, Inc.

  14. Characteristic manifolds in relativistic hypoelasticity

    Energy Technology Data Exchange (ETDEWEB)

    Giambo, S [Messina Univ. (Italy). Istituto di Matematica

    1978-10-02

    The relativistic hypoelasticity is considered and the characteristic manifolds are determined by using the Cauchy-Kovalevski theorem for the Cauchy problem with analytic initial conditions. Taking into account that the characteristic manifold represents the image of the front-wave in the space-time, it is possible to determine the velocities of propagation. Three wave-species are obtained: material waves, longitudinal waves and transverse waves.

  15. Some characteristics of the seismicity of the Tyrrhenian Sea Region

    Directory of Open Access Journals (Sweden)

    P. HEDERVARI

    1974-06-01

    Full Text Available In the first p a r t of the paper the seismic strain release of the T y r r h e n i a n Sea Region (including Italy, as the function of time, is examined on the basis of t h e d a t a of the e a r t h q u a k e s t h a t took place f r om 1901.01.01 to 1970.12.31, between the northern l a t i t u d e s of 34° and 44° and between the eastern longitudes of 8° and 18.5°, respectively. All registered shocks with a R i c h t e r - m a g n i t u d e of 5.5 or over it were considered, i n d e p e n d e n t l y f r om t h e focal d e p t h . Three periods were recognized in the a c t i v i t y ; t h e lengths of which are not t h e same, however. I n the second p a r t the elastic strain release in accordance with the focal d e p t h of t h e same e a r t h q u a k e s is t r e a t e d briefly. It was found t h at t h e t o t a l strain-release had a maximum value in t h e depth between 0 and 74 kms and there was a minimum between the depth of 300 and 524 kins with an interval between 375 and 449 kms within which no earthquakes occurred at all. The general p a t t e r n of the d i s t r i b u t i o n of seismicity as t h e f u n c t i o n of hypocentral d e p t h reminds to the well-known picture, one can experience in other regions where i n t e r m e d i a t e and deep shocks occur. This s t a t e m e n t is consistent w i t h t h e idea, according to which t h e seismicity of t h e Tyrrhenian Sea Region can be discussed and explained in t h e light of t h e theory of new global tectonics. F i n a l l y , in the t h i r d p a r t of the study, the authors have s t a t e d t h at in some cases multiple events occurred b e n e a t h t h e Tyrrhenian Sea Region. Such multiple seismic events were detected in the case of other areas, such as the Fiji-Tonga-Kermadec Region, the seismic belt of South America etc., — but, according to the knowledge of t h e authors, this is t h e first occasion when multiple seismic events are

  16. The Prevalence of Hepatitis C Virus (HCV) among Lichen Planus Patients and Its Clinical Pattern at the University of Abuja Teaching Hospital (U.A.T.H), Gwagwalada, Abuja, Nigeria

    Science.gov (United States)

    Bob, Ukonu Agwu; Augustine, Uhunmwangho

    2012-01-01

    Objective: The relationship between hepatitis C virus and Lichen Planus have been widely reported in the literature; although there are wide geographical variations in the reported prevalence of hepatitis C virus infection in patients with lichen planus. This study seeks to determine the prevalence of hepatitis C virus among lichen planus patients and its clinical morphological type in the University of Abuja Teaching Hospital, Gwagwalada Abuja, Nigeria. Materials/Methods: This study was conducted between January 2010 and December, 2011 at the out patients Dermatological unit of the department of medicine at the University of Abuja Teaching Hospital Gwagwalada Abuja, Nigeria. Consecutive patients who had body eruptions suspected to be lichen planus were recruited and histology done for confirmation. The control group included patients’ relations and some dermatology patients known to have low risk of hepatitis C virus infection and liver function tests done for both subjects and control after obtaining oral consent from them to participate in the study. Result: Anti- HCV antibodies were detected in nine cases (21.4%) and one case (3.3%) in the control group. This was statistically significant difference between the HCV antibody among the subject and control group (Plichen planus was the most frequent clinical type. Liver function test was not statistically significant among the subject and control group. Conclusion: Lichen planus and Hepatitis C virus appear to have a relationship and the prevalence rate was higher among the subject as compared to the control group in our environment. PMID:22980383

  17. Measurement of activity concentrations of {sup 40}K, 2{sup 32T}h and {sup 238}U in TSP aerosols and the associated inhalation annual effective radiation dose to the public in Gosan site, Jeju

    Energy Technology Data Exchange (ETDEWEB)

    Han, Chung Hun; Park, Youn Hyun; Park, Jae Woo [Jeju National University, Jeju (Korea, Republic of)

    2016-10-15

    Gamma radiation emitted from naturally occurring radioisotopes, such as 40K and the radionuclides from the {sup 232}Th and {sup 238}U series and their decay products, which exist at trace levels in all ground formations, represents the main external source of irradiation to the human body. The objective of the current study is to determine the activity concentrations of 40K, {sup 232}Th and {sup 238}U in airborne TSP and the associated internal radiation dose to the public due to inhalation in Gosan site, Jeju Island, Korea. The atmospheric total suspended particulates (TSP) aerosols were collected at Gosan site of Jeju Island, which is one of the background sites of Korea, during January to April 2013. This study analyzed using ICP-DRC-MS the concentrations of potassium, uranium and thorium, and evaluated the annual effective dose by breathing from the results. The correlations between the studied natural isotopes is a good positive correlation between {sup 232}Th and {sup 238}U, supporting the conclusion that they originated from the same source, mostly the crust. The backward trajectory analysis has confirmed that the 40K, {sup 238}U and {sup 232}Th are delivered as the air masses have moved from the China continent. The inhalation annual effective radiation dose (default mode F) to the public due to natural isotopes of the airborne TSP was in the range 16.195 - 77.051 nSv/y, depending on the age group. Jeju Island with less pollution source and low population density is also one of the best places as a background area in Asia.

  18. The characteristics of a pneumatic muscle

    OpenAIRE

    Pietrala Dawid

    2017-01-01

    The article presents static and dynamic characteristics of pneumatic muscles. It presents the structure of the laboratory stand used to test pneumatic muscles. It discusses the methodology for determination of static and dynamic characteristics. The paper also illustrates characteristics showing the relationship of pneumatic muscles length and operating pressure, at a constant loading force (isotonic characteristics). It presents characteristics showing the relationship of pneumatic muscles s...

  19. Flight Determination of the Longitudinal Stability Characteristics of a 0.133-Scale Rocket-Powered Model of the Consolidated Vultee XFY-1 Airplane without Propellers at Mach Numbers from 0.73 to 1.19, TED No. NACA DE 369

    Science.gov (United States)

    Hastings, Earl E., Jr.; Mitcham, Grady L.

    1954-01-01

    A flight test has been conducted to determine the longitudinal stability and control,characteristics of a 0.133-scale model of the Consolidated Vultee XFY-1 airplane without propellers for the Mach number range between 0.73 and 1.19.

  20. FRIGG '95. ABB Atom's upgraded T/H loop

    International Nuclear Information System (INIS)

    Noren, T.

    1995-01-01

    The FRIGG '95 project is an upgrading and modernization of the FRIGG loop, ABB Atom's fuel test rig with BWR operating conditions. The current FRIGG loop with test section and heater rods is described, together with the modifications involved in the FRIGG '95 project, including the new unique tomographic void measuring system to be installed. Finally CFD (Computational Fluid Dynamics) is introduced. (orig) (8 refs., 10 figs.)

  1. [Prevalence and characteristics of urinary incontinence in community-dwelling-elderly as determined by comprehensive health examination and interview for the prevention of geriatric syndrome and bed-ridden state].

    Science.gov (United States)

    Yoshida, Yuko; Kim, Hunkyung; Iwasa, Hajime; Kwon, Jinhee; Sugiura, Miho; Furuna, Taketo; Yoshida, Hideyo; Suzuki, Takao

    2007-01-01

    We examined the prevalence and characteristics of urinary incontinence in community-dwelling elderly individuals. The participants were 1,783 individuals (768 men and 1,015 women) aged over 70 years who participated in a comprehensive health examination involving a medical examination and interview, plus physical performance tests. Differences in characteristics between individuals with and without urinary incontinence were examined, and multivariate logistic regression models were used to describe the characteristics associated with urinary incontinence. The prevalence of urinary incontinence was 13.4% in men and 23.3% in women. Urinary incontinence was significantly associated with a lower level of physical fitness. Multivariate logistic regression showed that urinary incontinence was significantly associated with a slower walking speed (Odds Ratio (OR) = 0.19, 95% Confidence Intervals (CI) 0.08-0.48) and lower serum albumin level (OR = 0.40, 95% CI 0.16-0.99) in men, and with a slower walking speed (OR = 0.29, 95% CI 0.15-0.56), a higher BMI (OR = 1.09, 95% CI 1.04-1.14), depression (OR = 3.06, 95% CI 1.40-6.69), and lack of physical activity (OR = 0.70, 95% CI 0.50-0.98) in women. The characteristics of urinary incontinence in this cohort of community-dwelling elderly individuals were a low level of physical fitness and poor nutritional state in men, and a low level of physical fitness, a tendency to be obese, a poor mental health state, and lack of physical activity in women.

  2. The characteristics of successful entrepreneurs

    OpenAIRE

    Pokrajčić Dragana M.

    2004-01-01

    This paper examines the economic, psychological and social-behavioral theories of the entrepreneur in order to determine the characteristics of a successful entrepreneur. The major contribution of economic theories of the entrepreneur is better understanding of the entrepreneur and his/her role in economic development. The psychological characteristic theory of entrepreneur argues that successful entrepreneurs possess certain personality traits that mark them out as special, and tries to dete...

  3. Plasticity characteristic obtained by indentation

    International Nuclear Information System (INIS)

    Mil'man, Yu.V.; Chugunova, S.I.; Goncharova, I.V.

    2011-01-01

    Methods for determination plasticity characteristic δH in the measurement of hardness and nanohardness are considered. Parameter δH characterizes the plasticity of a material by the part of plastic deformation in the total elastic-plastic deformation. The value of δH is defined for metals with different types of crystal lattice, covalent and partially covalent crystals, intermetallics, metallic glasses and quasicrystals. It is discussed the dependence of the plasticity characteristic δH on structural factors and temperature. Parameter δH allows to analyze and compare the plasticity of materials which are brittle at standard mechanical tests. The combination of hardness H, as the strength characteristic, and the plasticity characteristic δH makes possible the better characterization of mechanical behavior of materials than only the hardness H. The examples of plasticity characteristic δH application are represented.

  4. Investigation of empirical correlations on the determination of condensation heat transfer characteristics during downward annular flow of R134a inside a vertical smooth tube using artificial intelligence algorithms

    Energy Technology Data Exchange (ETDEWEB)

    Balcilar, Muhammet; Dalkilic, Ahmet Selim; Bolat, Berna [Yildiz Technical University, Istanbul (Turkmenistan); Wongwises, Somchai [King Mongkut' s University of Technology Thonburi, Bangkok (Thailand)

    2011-10-15

    The heat transfer characteristics of R134a during downward condensation are investigated experimentally and numerically. While the convective heat transfer coefficient, two-phase multiplier and frictional pressure drop are considered to be the significant variables as output for the analysis, inputs of the computational numerical techniques include the important two-phase flow parameters such as equivalent Reynolds number, Prandtl number, Bond number, Froude number, Lockhart and Martinelli number. Genetic algorithm technique (GA), unconstrained nonlinear minimization algorithm-Nelder-Mead method (NM) and non-linear least squares error method (NLS) are applied for the optimization of these significant variables in this study. Regression analysis gave convincing correlations on the prediction of condensation heat transfer characteristics using {+-}30% deviation band for practical applications. The most suitable coefficients of the proposed correlations are depicted to be compatible with the large number of experimental data by means of the computational numerical methods. Validation process of the proposed correlations is accomplished by means of the comparison between the various correlations reported in the literature.

  5. Determination and analysis of the physical chemical characteristics of witness coupons of boral for the CNLV; Determinacion y analisis de las caracteristicas fisico quimicas de cupones testigo de boral para la CNLV

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez M, J.L.; Aguilar H, F.; Rivero G, T.; Carrillo M, R. [ININ, Apdo. Post 18-1027, Col Escandon, 11801 Mexico D.F. (Mexico)]. E-mail: jlgm@nuclear.inin.mx; fah@nuclear.inin.mx; trg@nuclear.inin.mx; racm@nuclear.inin.mx

    2004-07-01

    The burnt fuel elements that are extracted in each charging of the Units 1 and 2 of the Nuclear Power Plant of Laguna Verde, are deposited in shelves placed in the storage reservoir designed for this end. Each cell or storage shelf has a structure type cage. Among the cells neutron absorber material is placed, (Boral), what allows to avoid the possible criticality that could settle down when accumulating in the storage the irradiated fuel elements. This boral has been designed to maintain its characteristics of thermal neutron absorber during a lifetime of the plant. To check that the wings and the Boral have not suffered some degradation or some change due to the environmental conditions in the warehouse, it is necessary to watch over their physical and chemical characteristics periodically, what is carried out by a surveillance program based on Badges or manufactured witness coupons of the same material that the wings. The badges witness are embedded in a special wing, which is placed in the place with more radiation in the pool. In this work the laboratory tests carried out in the ININ to the coupon witness 03 of the Unit 2, (II-03) are described, being presented the results and obtained conclusions. (Author)

  6. Transient characteristics of thermal energy storage in an enclosure packed with MEPCM particles

    International Nuclear Information System (INIS)

    Siao, Yong-Hao; Yan, Wei-Mon; Lai, Chi-Ming

    2015-01-01

    The heat transfer characteristics of phase change materials have been of continuing interest of research due to various potential technical applications, such as the latent-heat thermal energy storage, thermal protection, as well as active/passive electronic cooling. In this work, the transient characteristics of thermal energy storage in a partitioned enclosure filled with microencapsulated phase change material (MEPCM) particles were investigated experimentally and numerically. To examine the different melting temperature effects, two different MEPCM particles are tested. The core phase change materials of the MEPCM are n-octadecane with melting temperature about T M  = 28 °C and 37 °C. The enclosure is partitioned and is differentially heated by the two horizontal isothermal surfaces, while the other vertical surfaces are considered thermally insulated. The studies have been undertaken for five sets of the hot and cold wall temperatures imposed across the enclosure. The consequents show that the numerical results are in agreement with the measured data. At the initial transient, the net energy storage in enclosure, Q net , increases with the time Fo. Finally, the Q net approaches quickly the steady state for the case with a higher temperature difference of T h  − T c . Additionally, higher dimensionless accumulated energy through the hot wall Q h and cold wall Q c is found for a case with higher hot wall temperature T h

  7. Determination of characteristic properties of low sulphur IGO (industrial gasoil) and FAME (fatty acid methyl ester) mixtures for application technology; Bestimmung anwendungstechnischer Eigenschaften von FAME (Fettsaeuremethylester) in Heizoel EL mittels einer Pruefapparatur

    Energy Technology Data Exchange (ETDEWEB)

    Liska, M.; Rheinberg, O. van [Oel-Waerme-Inst. gGmbH, Aachen (Germany); Seehack, S.; Gruen, H.; Lucka, K.; Koehne, H. [Inst. fuer wirtschaftliche Oelheizung (IWO), Hamburg (Germany)

    2008-10-15

    Hardware-in-the-loop test rigs have been assembled for the investigation of characteristic properties of mixtures of low-sulfur IGO and FAME for application technology. The aim of these test rigs is to differentiate alternative fuels regarding the operational reliability for the use in oil firing systems. Two out of three 20% (v/v) FAME mixtures proofed to be critical as malfunctions due to blockings and deposits occurred. The critical fuels furthermore showed a significant increase in water content, acid number and peroxide number. This shows interdependency between malfunction of burner components and a delectable change of fuel properties. Nonetheless the fuel analytics prior to testing could not be used to predict the fuel quality. An increase of component lifetime could be achieved by the change of the oil tube material from copper to stainless steel respectively the stabilization of the fuel by additives for those alternative fuels proven to be critical. (orig.)

  8. Characteristics of tornado generated missiles

    International Nuclear Information System (INIS)

    Bhattacharyya, A.K.; Boritz, R.C.; Niyogi, P.K.

    1975-10-01

    The development of techniques designed to calculate tornado missile velocities is traced. It is shown that there is a need for a consistent method for obtaining missile velocities for a variety of tornado parameters. A consistent method for determination of trajectories and velocities of missiles generated by a tornado is described. The effects of plant layout upon missile impact velocity at a given building are discussed from the point of view of determining the necessary missile barrier characteristics. 19 references

  9. Comparative characteristics of metatarsal bones (Ossa metatarsi) and finger articles (Ossa digitorum pedis seu phalanges digitorum) of roe deer (Capreolus capreolus) and sheep (Ovis aries) in orderto determine animal species

    OpenAIRE

    Blagojević Miloš; Nikolić Zora; Zorić Zoran; Ćupić-Miladinović Dejana

    2016-01-01

    Metatarsal bones and finger articles of roe deer and sheep are rarely used for animal identification. In practice there are frequent cases where on a corpse the head and distal parts of the limbs are missing. That is in order to prevent the identification of the bones, by which it is easiest to determine the animal species. For identification of metatarsal bones (Ossa metatarsi) as well as finger articles (Os­sa digitorum pedis seu phalanges digitorum) ther...

  10. Methodology for determination of the operational limits in a atmospheric oven as a function of the load characteristics; Metodologia para determinacao dos limites operacionais de um forno atmosferico em funcao das caracteristicas da carga

    Energy Technology Data Exchange (ETDEWEB)

    Mundstock, Rene [Refinaria Alberto Pasqualini (REFAP), Canoas, RS (Brazil); Correa, Eduardo Coelho [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2000-07-01

    The necessity of increasing the crude processing with operation periods even greater, are resulting in Atmospheric Distillation Units in severe conditions, requiring even more rigorous operational procedures. The crude fired heaters are the critical equipment in this context, because they are the most susceptible to failures, if some determined limits are exceeded. This work was originated from the tube failure analysis of the fired heater F-101 of Alberto Pasqualini Refinery (REFAP), occurred in july/98, due to internal cocking, with unit emergency shut-down. During this analysis, it was verified that the operational limit of a fired heater cannot be determined only by its design thermal duty, it must be also taken into account the influence of the crude composition. This will determine, due to its film coefficient, the region of the radiation zone of the fired heater where it will begin the crude vaporization and will occur the greater temperatures. The work conclusions resulted on the revision of the Unit operational procedures and definition of new crude processing limits. The fired heater operates with no problems since then. (author)

  11. The Characteristics of Informed Trading

    DEFF Research Database (Denmark)

    Aslan, Hadiye; Easley, David; Hvidkjær, Søren

    2011-01-01

    This paper investigates the linkage of microstructure, accounting, and asset pricing. We determine the relationship between firm characteristics as captured by accounting and market data and a firm's probability of private information-based trade (PIN) as estimated from trade data. This allows us...

  12. Characteristics of public roads operation

    OpenAIRE

    Pryimak, V.; Kyiashko, I.

    2009-01-01

    Characteristics of public roads operation have been considered and factors influencing TEC of public roads that go via urban areas have been determined. There have been revealed contradictions in the normative-legal base concerning maintenance of public roads and municipal roads that merge into them.

  13. Artistic Understanding and Motivational Characteristics

    Science.gov (United States)

    Lekue, Pablo

    2015-01-01

    This study aims to analyse artistic understanding in primary and secondary education and the relationship between this understanding and motivational characteristics such as goal orientation, engagement in art activities and attitude to art education at school, which determine (according to prior research) learners' academic achievement, in…

  14. Hydrogeological Characteristics of Fractured Rocks around the In-DEBS Test Borehole at the Underground Research Facility (KURT)

    Science.gov (United States)

    Ko, Nak-Youl; Kim, Geon Young; Kim, Kyung-Su

    2016-04-01

    In the concept of the deep geological disposal of radioactive wastes, canisters including high-level wastes are surrounded by engineered barrier, mainly composed of bentonite, and emplaced in disposal holes drilled in deep intact rocks. The heat from the high-level radioactive wastes and groundwater inflow can influence on the robustness of the canister and engineered barrier, and will be possible to fail the canister. Therefore, thermal-hydrological-mechanical (T-H-M) modeling for the condition of the disposal holes is necessary to secure the safety of the deep geological disposal. In order to understand the T-H-M coupling phenomena at the subsurface field condition, "In-DEBS (In-Situ Demonstration of Engineered Barrier System)" has been designed and implemented in the underground research facility, KURT (KAERI Underground Research Tunnel) in Korea. For selecting a suitable position of In-DEBS test and obtaining hydrological data to be used in T-H-M modeling as well as groundwater flow simulation around the test site, the fractured rock aquifer including the research modules of KURT was investigated through the in-situ tests at six boreholes. From the measured data and results of hydraulic tests, the range of hydraulic conductivity of each interval in the boreholes is about 10-7-10-8 m/s and that of influx is about 10-4-10-1 L/min for NX boreholes, which is expected to be equal to about 0.1-40 L/min for the In-DEBS test borehole (diameter of 860 mm). The test position was determined by the data and availability of some equipment for installing In-DEBS in the test borehole. The mapping for the wall of test borehole and the measurements of groundwater influx at the leaking locations was carried out. These hydrological data in the test site will be used as input of the T-H-M modeling for simulating In-DEBS test.

  15. Experimental Determination of the Neutron Characteristics of UO{sub 2}-PuO{sub 2}-H{sub 2}O Lattices; Determination Experimentale Des Caracteristiques Neutroniques De Reseaux UO{sub 2}-PuO{sub 2}-H{sub 2}O

    Energy Technology Data Exchange (ETDEWEB)

    Debrue, J.; Fabry, A.; Leenders, L.; Motte, F.; Van Den Broeck, H. [Centre d' Etude de l' Energie Nucleaire, Mol (Belgium)

    1967-09-15

    plutonium: fission density measurements by direct counting of the fission products formed in the mixed fuel as a result of irradiation, and measurements of spectral indices by means of fission detectors and detectors having resonances close to those of the isotopes of plutonium. The optimum conditions for applying these techniques are described and the effect on the fuel cycle of uncertainties in the values for the spectral indices (ratios of cross-sections) is discussed. A brief reference is finally made to a programme of sub-critical experiments conducted hitherto with two batches of UO{sub 2} fuel enriched to 5% and 7% {sup 235}U, and having the purpose of studying possible methods of exciting a sub-critical lattice by means of an external neutron source in pulsed and modulated operation. The aim of this programme is to ascertain to what extent these methods, which employ a quantity of fuel considerably less than the critical mass, can help in determining the characteristics of a lattice. The advantages of such methods are particularly obvious in the case of plutonium fuels. (author) [French] Au cours de l'etude dans l'installation critique VENUS du coeur a moderation variable du reacteur BR3/VULCAIN, un assemblage combustible constitue de 37 crayons UO{sub 2}-PuO{sub 2} (94% UO{sub 2} naturel, PuO{sub 2}) a ete substitue a un des assemblages combustibles UO{sub 2} enrichi a 7% {sup 235}U constituant le coeur de ce reacteur. Des experiences ont ete effectuees dans le but de permettre l'ajustement des modeles du calcul des performances de cet assemblage special: on a notamment mesure la distribution de la densite de fission ainsi que l'evolution du rapport des sections efficaces effectives de fission dans {sup 239}Pu et {sup 235}U. Une experience critique directement orientee sur les problemes de recyclage du plutonium dans les reacteurs thermiques a eau legere pressurisee est en cours d'execution dans la meme installation critique. A cette fin, on dispose de deux

  16. İşin Anlamlılığını Belirleyen Sosyal-Yapısal Özelliklerin Güçlendirmeye Olan Etkileri ve Sonuçları Üzerine bir Araştırma = A Study on the Effects of the Social-Structural Characteristics Determining the Meaningfulness of Work on Empowerment and the Results of these Effects

    Directory of Open Access Journals (Sweden)

    Hasan GÜL

    2005-01-01

    Full Text Available This study aims to determine the social-structural characteristics that organizations must have in order that employees could feel themselves empowered. For this purpose, the possible effects of social-structural characteristics on the meaningfulness level of the work performed were studied. In addition, an analysis was conducted to determine whether the level of work meaningfulness might lead to affective commitment as well. The subjects of the study were 222 administrative personnel of 13 state universities. In conclusion, it was determined that the structural characteristics providing the work with meaningfulness were role ambiguity, access to resourses, and access to information. In addition, it was determined that the employees who find their work meaningful have affective commitment to their organizations.

  17. An investigation of the magnetic field of Transient Disturbances (TD) at the Earth's orbit, and a determination of solar sources of TD from their characteristics at R = 1 AU

    Science.gov (United States)

    Fainshtein, V. .G.; Kaigorodov, A. P.

    1995-01-01

    We have investigated and intercompared the typical features of the magnetic field of two types of solar wind transient disturbances with shock waves: the shock wave is accompanied by a magnetic cloud (MC), and the shock wave is followed by a region with bidirectional solar wind electron heat flux (BEHF), with no MC present. In this case, a separate study was made of the field features in two typical TD structures: in the region of impact-compressed solar wind between the shock wave and MC or BEHF, as well as in MC and BEHF. The study has provided new results on the influence of the ambient SW upon the TD magnetic field and the relationship between fields in various TD structures. A new test for the existence of interplanetary magnetic field draping around MC and BEHF is proposed and verified. It is concluded that the magnetic field configuration around MC is more adequately consistent with the concept of magnetic line draping than is the case around BEHF Two methods are proposed to infer the location of solar sources of TD from their characteristics at R = 1 AU.

  18. Determination of {sup 222}Rn and its physico-chemical and biological characteristics in aquifers of Toluca valley; Determinacion de {sup 222}Rn y caracteristicas fisicoquimicas y biologicas en acuiferos del Valle de Toluca

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez, A.; Aranda, P.; Ceballos, S.; Cruz, D.; Jauregui, B.; Lopez, R.; Pena, P.; Salazar, S.; Segovia, N.; Tamez, E. [Instituto nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1997-07-01

    In this work it is realized a geochemical study which includes the evaluation of {sup 222} Rn concentration in drinking water wells at Toluca city and a spring water of Almoloya de Juarez municipality at State of mexico. the same is studied about evolution of {sup 222} Rn concentration in water of the hydrating which supply it to those wells. the geochemical evaluation also covers the determination of major and minor elements or trace and the biological analysis of water. The study includes two seasonal cycles, the low water mark one and other the rainy for being able to evaluate the aquifers reloading effects in the water composition. (Author)

  19. Free-Spinning-Tunnel Investigation to Determine the Effect of Spin-Recovery Rockets and Thrust Simulation on the Recovery Characteristics of a 1/21-Scale Model of the Chance Vought F7U-3 Airplane, TED No. NACA AD 3103

    Science.gov (United States)

    Burk, Sanger H., Jr.; Healy, Frederick M.

    1955-01-01

    An investigation of a l/21-scale model of the Chance Vought F7U-3 airplane in the co&at-load- condition has been conducted in the Langley 20-foot free-spinning tunnel, The recovery characteristics of the model were determined by use of spin-recovery rockets for the erect and inverted spinning condition. The rockets were so placed as to provide either a yawing or rolling moment about the model center of gravity. Also included in the investigation were tests to determine the effect of simulated engine thrust on the recovery characteristics of the model. On the basis of model tests, recoveries from erect and inverted spins were satisfactory when a yawing moment of 22,200 foot-pounds (full scale) was provided against the spin by rockets attached to the wing tips; the anti-spin yawing moment was applied for approximately 9 seconds, (full scale). Satisfactory recoveries were obtained from erect spins when a rolling moment of 22,200 foot-pounds (full scale) was provided with the spin (rolls right wing down in right spin). Although the inverted spin was satisfactorily terminated when a rolling moment of equal magnitude was provided, a roll rocket was not considered to be an optimum spin-recovery device to effect recoveries from inverted spins for this airplane because of resulting gyrations during spin recovery. Simulation of engine thrust had no apparent effect on the spin recovery characteristics.

  20. Longitudinal Stability and Control Characteristics as Determined by the Rocket-model Technique for an Inline, Cruciform, Canard Missile Configuration with a Low-aspect-ratio Wing Having Trailing-edge Flap Controls for a Mach Number Range of 0.7 to 1.

    Science.gov (United States)

    Baber, Hal T , Jr; Moul, Martin T

    1955-01-01

    Two full-scale models of an inline, cruciform, canard missile configuration having a low-aspect-ratio wing equipped with flap-type controls were flight tested in order to determine the missile's longitudinal aerodynamic characteristics. Stability derivatives and control and drag characteristics are presented for a range of Mach number from 0.7 to 1.8. Nonlinear lift and moment curves were noted for the angle - of-attack range of this test (0 deg to 8 deg). The aerodynamic-center location for angles of attack near 50 remained nearly constant for supersonic speeds at 13.5 percent of the mean aerodynamic chord; whereas for angles of attack near 0 deg, there was a rapid forward movement of the aerodynamic center as the Mach number increased. At a control deflection of 0 deg, the missile's response to the longitudinal control was in an essentially fixed space plane which was not coincident with the pitch plane as a result of the missile rolling. As a consequence, stability characteristics were determined from the resultant of pitch and yaw motions. The damping-in-pitch derivatives for the two angle -of-attack ranges of the test are in close agreement and varied only slightly with Mach number. The horn-balanced trailing-edge flap was effective in producing angle of attack over the Mach number range.

  1. Longitudinal Stability and Control Characteristics as Determined by the Rocket-Model Technique for an Inline, Cruciform, Canard Missile Configuration with a Low-Aspect-Ratio Wing Having Trailing-Edge Flap Controls for a Mach Number Range of 0.7 to 1.8

    Science.gov (United States)

    Baber, H. T., Jr.; Moul, M. T.

    1955-01-01

    Two full-scale models of an inline, cruciform, canard missile configuration having a low-aspect-ratio wing equipped with flap-type controls were flight tested in order to determine the missile's longitudinal aerodynamic characteristics. Stability derivatives and control and drag characteristics are presented for a range of Mach number from 0.7 to 1.8. Nonlinear lift and moment curves were noted for the angle-of-attack range of this test (0 deg to 8 deg ). The aerodynamic-center location for angles of attack near 5 deg remained nearly constant for supersonic speeds at 13.5 percent of the mean aerodynamic chord; whereas for angles of attack near O deg, there was a rapid forward movement of the aerodynamic center as the Mach number increased. At a control deflection of O deg, the missile's response to the longitudinal control was in an essentially fixed space plane which was not coincident with the pitch plane as a result of the missile rolling. As a consequence, stability characteristics were determined from the resultant of pitch and yaw motions. The damping-in-pitch derivatives for the two angle-of-attack ranges of the test are in close agreement and varied only slightly with Mach number. The horn-balanced trailing-edge flap was effective in producing angle of attack over the Mach number range.

  2. The characteristics of a pneumatic muscle

    Directory of Open Access Journals (Sweden)

    Pietrala Dawid

    2017-01-01

    Full Text Available The article presents static and dynamic characteristics of pneumatic muscles. It presents the structure of the laboratory stand used to test pneumatic muscles. It discusses the methodology for determination of static and dynamic characteristics. The paper also illustrates characteristics showing the relationship of pneumatic muscles length and operating pressure, at a constant loading force (isotonic characteristics. It presents characteristics showing the relationship of pneumatic muscles shortening and values of loading forces, at a constant operational pressure (isobaric characteristics. It also shows the dependence of force generated by the muscle on the operating pressure, at a constant value of pneumatic muscles shortening (isometric characteristics. The paper also presents dynamic characteristics of a pneumatic muscle showing the response of an object to a gradual change in the operating pressure, at a constant loading force acting on the pneumatic muscle.

  3. The characteristics of a pneumatic muscle

    Science.gov (United States)

    Pietrala, Dawid

    The article presents static and dynamic characteristics of pneumatic muscles. It presents the structure of the laboratory stand used to test pneumatic muscles. It discusses the methodology for determination of static and dynamic characteristics. The paper also illustrates characteristics showing the relationship of pneumatic muscles length and operating pressure, at a constant loading force (isotonic characteristics). It presents characteristics showing the relationship of pneumatic muscles shortening and values of loading forces, at a constant operational pressure (isobaric characteristics). It also shows the dependence of force generated by the muscle on the operating pressure, at a constant value of pneumatic muscles shortening (isometric characteristics). The paper also presents dynamic characteristics of a pneumatic muscle showing the response of an object to a gradual change in the operating pressure, at a constant loading force acting on the pneumatic muscle.

  4. {sup 222} Rn determination and physicochemical characteristic and biological in aquifers in the Toluca Valley; Determinacion de {sup 222} Rn y caracteristicas fisicoquimicas y biologicas en acuiferos del Valle de Toluca

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez A, A

    1998-10-01

    Concentration levels of {sup 222} Rn and {sup 226} Rn have been analyzed in water samples from boreholes belonging to the drinking water supply system around Toluca, Mexico. The {sup 222} Rn source is the decay of {sup 226} Rn within the solid matrix of the aquifer. The study was performed during the dry and rainy seasons. {sup 222} Rn concentration was determined by the liquid scintillation technique, {sup 226} Rn was determined by gamma spectrometry, the physicochemical parameters and bacteriological analysis were performed by conventional chemical techniques. Solubilized trace elements were determined by Inductively Coupled Plasma - Mass Spectrometry (Icp-Ms). The radon level fluctuations at the boreholes in Toluca city and Almoloya spring indicated differences in the radon content. At borehole Lodos Prietos 2, the temperature and radon level were systematically the highest in comparison with the other boreholes and the spring indicating a contribution of a regional flow to the water of this particular borehole. The result for {sup 226} Rn, the average {sup 222} Rn observed during the sampling period, no correspondence occurs between the radium and the radon content indicating that, radon is not supported by radium, but is incorporated into the water through fissures in the rocks in contact with the water. The radon levels obtained in house faucets which water is supplied by boreholes decrease as a function of the distance from the source borehole to the house. With the chemical composition of each one of the studied boreholes and spring a Piper diagram was draw indicating the kind of water. The boreholes and spring can be classified as bicarbonate calcium/magnesium. Almost no fluctuation on time was observed in the chemical species and trace elements only a slight increase was observed at the end of the rain season. At Almoloya, spring pollution with coliform bacteria and nitrates showed an anthropogenic contribution to the water deterioration probable and

  5. Comparative characteristics of metatarsal bones (Ossa metatarsi and finger articles (Ossa digitorum pedis seu phalanges digitorum of roe deer (Capreolus capreolus and sheep (Ovis aries in orderto determine animal species

    Directory of Open Access Journals (Sweden)

    Blagojević Miloš

    2016-01-01

    Full Text Available Metatarsal bones and finger articles of roe deer and sheep are rarely used for animal identification. In practice there are frequent cases where on a corpse the head and distal parts of the limbs are missing. That is in order to prevent the identification of the bones, by which it is easiest to determine the animal species. For identification of metatarsal bones (Ossa metatarsi as well as finger articles (Os­sa digitorum pedis seu phalanges digitorum there were used distal parts of hindlimb bones, taken from 6 roe deers and 7 sheep. Afer the separation from the soft tissues, the bones were boiled in an autoclave, and for bleaching and degreasing they were kept in 3% solution of hydrogen peroxide (H2O2. The bones were air dried, and then photographed. In roe deer, four metatarsal bones are developed: the second (Os metatarsale secundum, the third (Os metatarsale tertium, the fourth (Os metatarsale quartum and the fifth (Os metatarsale quintum. In sheep, the third (Os metatarsale tertium and the fourth (Os metatarsale quartum metatarsal bones are developed. Both in roe deer and sheep, the third and the fourth metatarsal bones are fused into one single bone - main metatarsal bone. In sheep, on dorsal and plantar side of these bones there are grooves which are more shallow and wider than in roe deer. In roe deer, hindlimbs have four fingers, and in sheep two. In roe deer there is also the difference in the number of articles on the second and fifth finger. In this animal the second and fifth finger have coalesced the first and second article (Ph1 + Ph2 and the third article(Ph3. Based on the third article of the third and fourth finger, it may be distinguished one animal from another. Margo solearis in roe deer is peaky and in sheep it is blunt. In roe deer Processus extensorius is peaky on Margo coronalis, while in shee it is blunt. In the cases when material (fresh meat, blood, hair necessary for some laboratory methods is missing, there is used

  6. THE COMBUSTION CHARACTERISTICS OF LIGNITE BLENDS

    Institute of Scientific and Technical Information of China (English)

    Cheng Jun; Zhou Junhu; Cao Xinyu; Cen Kefa

    2000-01-01

    The combustion characteristics of lignite blends were studied with a thermogravimetric analyzer (t.g.a.), at constant heating rate.The characteristic temperatures were determined from the burning profiles.It was found that the characteristic times of combustion reaction moved forward, the ignition temperature dropped and the burnout efficiency slightly changed when blending lignites.The characteristic parameters of blends could not be predicted as a linear function of the average values of the individual lignites.when blending with less reactive coal, the ignition and burnout characteristics of lignite turned worse.

  7. Assessment of hydrogeologic terrains, well-construction characteristics, groundwater hydraulics, and water-quality and microbial data for determination of surface-water-influenced groundwater supplies in West Virginia

    Science.gov (United States)

    Kozar, Mark D.; Paybins, Katherine S.

    2016-08-30

    In January 2014, a storage tank leaked, spilling a large quantity of 4-methylcyclohexane methanol into the Elk River in West Virginia and contaminating the water supply for more than 300,000 people. In response, the West Virginia Legislature passed Senate Bill 373, which requires the West Virginia Department of Health and Human Resources (WVDHHR) to assess the susceptibility and vulnerability of public surface-water-influenced groundwater supply sources (SWIGS) and surface-water intakes statewide. In response to this mandate for reassessing SWIGS statewide, the U.S. Geological Survey (USGS), in cooperation with the WVDHHR, Bureau of Public Health, Office of Environmental Health Services, compiled available data and summarized the results of previous groundwater studies to provide the WVDHHR with data that could be used as part of the process for assessing and determining SWIGS.

  8. Leaf structural characteristics are less important than leaf chemical properties in determining the response of leaf mass per area and photosynthesis of Eucalyptus saligna to industrial-age changes in [CO2] and temperature.

    Science.gov (United States)

    Xu, Cheng-Yuan; Salih, Anya; Ghannoum, Oula; Tissue, David T

    2012-10-01

    The rise in atmospheric [CO(2)] is associated with increasing air temperature. However, studies on plant responses to interactive effects of [CO(2)] and temperature are limited, particularly for leaf structural attributes. In this study, Eucalyptus saligna plants were grown in sun-lit glasshouses differing in [CO(2)] (290, 400, and 650 µmol mol(-1)) and temperature (26 °C and 30 °C). Leaf anatomy and chloroplast parameters were assessed with three-dimensional confocal microscopy, and the interactive effects of [CO(2)] and temperature were quantified. The relative influence of leaf structural attributes and chemical properties on the variation of leaf mass per area (LMA) and photosynthesis within these climate regimes was also determined. Leaf thickness and mesophyll size increased in higher [CO(2)] but decreased at the warmer temperature; no treatment interaction was observed. In pre-industrial [CO(2)], warming reduced chloroplast diameter without altering chloroplast number per cell, but the opposite pattern (reduced chloroplast number per cell and unchanged chloroplast diameter) was observed in both current and projected [CO(2)]. The variation of LMA was primarily explained by total non-structural carbohydrate (TNC) concentration rather than leaf thickness. Leaf photosynthetic capacity (light- and [CO(2)]-saturated rate at 28 °C) and light-saturated photosynthesis (under growth [CO(2)] and temperature) were primarily determined by leaf nitrogen contents, while secondarily affected by chloroplast gas exchange surface area and chloroplast number per cell, respectively. In conclusion, leaf structural attributes are less important than TNC and nitrogen in affecting LMA and photosynthesis responses to the studied climate regimes, indicating that leaf structural attributes have limited capacity to adjust these functional traits in a changing climate.

  9. Determinants of intercultural adjustment among expatriate spouses

    NARCIS (Netherlands)

    Ali, Anees; Van der Zee, K.I.; Sanders, G

    The adaptation of expatriate families to a host country seems crucial to successful fulfilment of international business assignments. The present study focused on personality, family characteristics and characteristics of expatriates' work life as determinants of the intercultural adjustment of

  10. A Case⁻Control Study of Socio-Economic and Nutritional Characteristics as Determinants of Dental Caries in Different Age Groups, Considered as Public Health Problem: Data from NHANES 2013⁻2014.

    Science.gov (United States)

    Zanella-Calzada, Laura A; Galván-Tejada, Carlos E; Chávez-Lamas, Nubia M; Gracia-Cortés, Ma Del Carmen; Moreno-Báez, Arturo; Arceo-Olague, Jose G; Celaya-Padilla, Jose M; Galván-Tejada, Jorge I; Gamboa-Rosales, Hamurabi

    2018-05-10

    One of the principal conditions that affects oral health worldwide is dental caries, occurring in about 90% of the global population. This pathology has been considered a challenge because of its high prevalence, besides being a chronic but preventable disease which can be caused by a series of different demographic, dietary" among others. Based on this problem, in this research a demographic and dietary features analysis is performed for the classification of subjects according to their oral health status based on caries, according to the age group where the population belongs, using as feature selector a technique based on fast backward selection (FBS) approach for the development of three predictive models, one for each age range (group 1: 10⁻19; group 2: 20⁻59; group 3: 60 or more years old). As validation, a net reclassification improvement (NRI), AUC, ROC, and OR values are used to evaluate their classification accuracy. We analyzed 189 demographic and dietary features from National Health and Nutrition Examination Survey (NHANES) 2013⁻2014. Each model obtained statistically significant results for most features and narrow OR confidence intervals. Age group 2 obtained a mean NRI = -0.080 and AUC = 0.933; age group 3 obtained a mean NRI = -0.024 and AUC = 0.787; and age group 4 obtained a mean NRI = -0.129 and AUC = 0.735. Based on these results, it is concluded that these specific demographic and dietary features are significant determinants for estimating the oral health status in patients based on their likelihood of developing caries, and the age group could imply different risk factors for subjects.

  11. Forecasting characteristics of flood effects

    Science.gov (United States)

    Khamutova, M. V.; Rezchikov, A. F.; Kushnikov, V. A.; Ivaschenko, V. A.; Bogomolov, A. S.; Filimonyuk, L. Yu; Dolinina, O. N.; Kushnikova, E. V.; Shulga, T. E.; Tverdokhlebov, V. A.; Fominykh, D. S.

    2018-05-01

    The article presents the development of a mathematical model of the system dynamics. Mathematical model allows forecasting the characteristics of flood effects. Model is based on a causal diagram and is presented by a system of nonlinear differential equations. Simulated characteristics are the nodes of the diagram, and edges define the functional relationships between them. The numerical solution of the system of equations using the Runge-Kutta method was obtained. Computer experiments to determine the characteristics on different time interval have been made and results of experiments have been compared with real data of real flood. The obtained results make it possible to assert that the developed model is valid. The results of study are useful in development of an information system for the operating and dispatching staff of the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM).

  12. 14 CFR 29.939 - Turbine engine operating characteristics.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Turbine engine operating characteristics....939 Turbine engine operating characteristics. (a) Turbine engine operating characteristics must be investigated in flight to determine that no adverse characteristics (such as stall, surge, of flameout) are...

  13. 14 CFR 23.939 - Powerplant operating characteristics.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Powerplant operating characteristics. 23... General § 23.939 Powerplant operating characteristics. (a) Turbine engine powerplant operating characteristics must be investigated in flight to determine that no adverse characteristics (such as stall, surge...

  14. 14 CFR 25.939 - Turbine engine operating characteristics.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Turbine engine operating characteristics... engine operating characteristics. (a) Turbine engine operating characteristics must be investigated in flight to determine that no adverse characteristics (such as stall, surge, or flameout) are present, to a...

  15. 14 CFR 27.939 - Turbine engine operating characteristics.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Turbine engine operating characteristics....939 Turbine engine operating characteristics. (a) Turbine engine operating characteristics must be investigated in flight to determine that no adverse characteristics (such as stall, surge, or flameout) are...

  16. Enhancing Authentication Models Characteristic Metrics via ...

    African Journals Online (AJOL)

    In this work, we derive the universal characteristic metrics set for authentication models based on security, usability and design issues. We then compute the probability of the occurrence of each characteristic metrics in some single factor and multifactor authentication models in order to determine the effectiveness of these ...

  17. Binge Eating in Obesity: Associated MMPI Characteristics.

    Science.gov (United States)

    Kolotkin, Ronette L.; And Others

    1987-01-01

    Determined Minnesota Multiphasic Personality Inventory (MMPI) characteristics' association with binge-eating severity among obese women. Indicated much variability in binge severity among obese women seeking treatment. MMPI characteristics were significantly related to binge severity. As binge severity increased, so did psychological disturbance,…

  18. Prospective Teachers' Personal Characteristics to Multicultural Education

    Science.gov (United States)

    Eskici, Menekse

    2016-01-01

    The aim of this paper is to determine prospective teachers' personal characteristics to multicultural education. It is also aimed to reveal whether there are meaningful differences in prospective teachers' personal characteristics to multicultural education according to their genders, age and number of siblings. The descriptive model was chosen to…

  19. Computing modal dispersion characteristics of radially Asymmetric ...

    African Journals Online (AJOL)

    We developed a matrix theory that applies to with non-circular/circular but concentric layers fibers. And we compute the dispersion characteristics of radially unconventional fiber, known as Asymmetric Bragg fiber. An attempt has been made to determine how the modal characteristics change as circular Bragg fiber is ...

  20. Sex determination

    Indian Academy of Sciences (India)

    The sex-determining system differs considerably among organisms. Even among insect species, the genetic system for sex-determination is highly diversified. In Drosophila melanogaster, somatic sexual differentiation is regulated by a well characterized genetic hierarchy X : A > Sxl > tra/tra2 > dsx and fru. This cascade ...