WorldWideScience

Sample records for technology frequently differed

  1. Case studies on forecasting for innovative technologies: frequent revisions improve accuracy.

    Science.gov (United States)

    Lerner, Jeffrey C; Robertson, Diane C; Goldstein, Sara M

    2015-02-01

    Health technology forecasting is designed to provide reliable predictions about costs, utilization, diffusion, and other market realities before the technologies enter routine clinical use. In this article we address three questions central to forecasting's usefulness: Are early forecasts sufficiently accurate to help providers acquire the most promising technology and payers to set effective coverage policies? What variables contribute to inaccurate forecasts? How can forecasters manage the variables to improve accuracy? We analyzed forecasts published between 2007 and 2010 by the ECRI Institute on four technologies: single-room proton beam radiation therapy for various cancers; digital breast tomosynthesis imaging technology for breast cancer screening; transcatheter aortic valve replacement for serious heart valve disease; and minimally invasive robot-assisted surgery for various cancers. We then examined revised ECRI forecasts published in 2013 (digital breast tomosynthesis) and 2014 (the other three topics) to identify inaccuracies in the earlier forecasts and explore why they occurred. We found that five of twenty early predictions were inaccurate when compared with the updated forecasts. The inaccuracies pertained to two technologies that had more time-sensitive variables to consider. The case studies suggest that frequent revision of forecasts could improve accuracy, especially for complex technologies whose eventual use is governed by multiple interactive factors. Project HOPE—The People-to-People Health Foundation, Inc.

  2. Memory complaints are frequent but qualitatively different in young and elderly healthy people

    NARCIS (Netherlands)

    Ginó, S.; Mendes, T.; Maroco, J.; Ribeiro, F.; Schmand, B.A.; de Mendonca, A.; Guerreiro, M.

    2010-01-01

    Background: Subjective memory complaints are frequently reported by the elderly. There is less information about the characterization of subjective memory complaints in young people. Objective: To determine different memory complaints between young and elderly people with the use of the Subjective M

  3. Exploration of English Idioms about Fruit and the Frequent Usage in Different Language Culture

    Directory of Open Access Journals (Sweden)

    Guilan Jiao

    2015-08-01

    Full Text Available English idioms are commonly found in the oral and written English, which are quite vivid, concise and carried with a large amount of information. It makes up the major part of English language. In English idioms, fruit ones are a unique expression, which are widely accepted and applied in the daily life of English-speaking countries and carried with heavy cultural connotations. This study made an exploration of the historical origins of English idioms about fruit based on Greek mythology and Bible of Christianity. Besides, it made a detailed analysis of their frequent usage from the perspective of daily life. With the deeper understanding of culture of English-speaking countries, there will be gradually enhanced skills of interpersonal communication between different cultures.

  4. Frequent Participation in Service Learning: Examining Institutional Differences and Individual Benefits

    Science.gov (United States)

    Bureau, Daniel A.; Cole, James S.; McCormick, Alexander C.

    2014-01-01

    This chapter examines the differences between institutions with high and low levels of involvement in service learning as well as the differences between students with high and low levels of involvement. The study shows a correlation between institutional organization and service-learning emphasis and describes, at the student level, correlations…

  5. Increased risk of breast cancer following different regimens of hormone replacement therapy frequently used in Europe

    DEFF Research Database (Denmark)

    Stahlberg, Claudia; Pedersen, Anette Tønnes; Lynge, Elsebeth

    2004-01-01

    Epidemiologic studies have shown an increased risk of breast cancer following hormone replacement therapy (HRT). The aim of this study was to investigate whether different treatment regimens or the androgenecity of progestins influence the risk of breast cancer differently. The Danish Nurse Cohort...

  6. Frequent Oscillatory Behavior of Delay Partial Difference Equations with Positive and Negative Coefficients

    Directory of Open Access Journals (Sweden)

    Xu LiHua

    2010-01-01

    Full Text Available This paper is concerned with a class of nonlinear delay partial difference equations with positive and negative coefficients, which also contains forcing terms. By making use of frequency measures, some new oscillatory criteria are established.

  7. Frequent false hearing by older adults: the role of age differences in metacognition.

    Science.gov (United States)

    Rogers, Chad S; Jacoby, Larry L; Sommers, Mitchell S

    2012-03-01

    In two experiments testing age differences in the subjective experience of listening, which we call meta-audition, young and older adults were first trained to learn pairs of semantic associates. Following training, both groups were tested on identification of words presented in noise, with the critical manipulation being whether the target item was congruent, incongruent, or neutral with respect to prior training. Results of both experiments revealed that older adults compared to young adults were more prone to "false hearing," defined as mistaken high confidence in the accuracy of perception when a spoken word had been misperceived. These results were obtained even when performance was equated across age groups on control items by reducing the noise level for older adults. Such false hearing is shown to reflect older adults' heavier reliance on context. Findings suggest that older adults' greater ability to benefit from semantic context reflects their bias to respond consistently with the context, rather than their greater skill in using context. Procedures employed are unique in measuring the subjective experience of hearing as well as its accuracy. Both theoretical and applied implications of the findings are discussed. Convergence of results with those showing higher false memory, and false seeing are interpreted as showing that older adults are less able to constrain their processing in ways that are optimal for performance of a current task. That lessened constraint may be associated with decline in frontal-lobe functioning.

  8. Equations with Technology: Different Tools, Different Views

    Science.gov (United States)

    Drijvers, Paul; Barzel, Barbel

    2012-01-01

    Has technology revolutionised the mathematics classroom, or is it still a device waiting to be exploited for the benefit of the learner? There are applets that will enable the user to solve complex equations at the push of a button. So, does this jeopardise other methods, make other methods redundant, or even diminish other methods in the mind of…

  9. Tradition over trend: Neighboring chimpanzee communities maintain differences in cultural behavior despite frequent immigration of adult females.

    Science.gov (United States)

    Luncz, Lydia V; Boesch, Christophe

    2014-07-01

    The notion of animal culture has been well established mainly through research aiming at uncovering differences between populations. In chimpanzees (Pan troglodytes verus), cultural diversity has even been found in neighboring communities, where differences were observed despite frequent immigration of individuals. Female chimpanzees transfer at the onset of sexual maturity at an age, when the behavioral repertoire is fully formed. With immigrating females, behavioral variety enters the group. Little is known about the diversity and the longevity of cultural traits within a community. This study is building on previous findings of differences in hammer selection when nut cracking between neighboring communities despite similar ecological conditions. We now further investigated the diversity and maintenance of cultural traits within one chimpanzee community and were able to show high levels of uniformity in group-specific behavior. Fidelity to the behavior pattern did not vary between dispersing females and philopatric males. Furthermore, group-specific tool selection remained similar over a period of 25 years. Additionally, we present a study case on how one newly immigrant female progressively behaved more similar to her new group, suggesting that the high level of similarity in behavior is actively adopted by group members possibly even when originally expressing the behavior in another form. Taken together, our data support a cultural transmission process in adult chimpanzees, which leads to persisting cultural behavior of one community over time.

  10. A difference between day and night : protein intake improves after the transition from conventional to frequent nocturnal home hemodialysis

    NARCIS (Netherlands)

    Ipema, Karin J. R.; van der Schans, Cees P.; Vonk, Noortje; de Vries, Jorien M.; Westerhuis, Ralf; Duym, Ellen; Franssen, Casper F. M.

    2012-01-01

    Background: Malnutrition is an important cause of the excessive morbidity and mortality rate of dialysis patients. Frequent nocturnal home hemodialysis (NHHD) has many benefits compared with conventional thrice-weekly hemodialysis (CHD), due to the virtual absence of dietary restrictions and a much

  11. The preferential accumulation of heavy metals in different tissues following frequent respiratory exposure to PM2.5 in rats

    Science.gov (United States)

    Li, Qingzhao; Liu, Huibin; Alattar, Mohamed; Jiang, Shoufang; Han, Jing; Ma, Yujiao; Jiang, Chunyang

    2015-11-01

    This study aimed to explore the pattern of accumulation of some of main heavy metals in blood and various organs of rats after exposed to the atmospheric fine particulate matter (PM2.5). Rats were randomly divided into control and three treatment groups (tracheal perfusion with 10 mg/kg, 20 mg/kg and 40 mg/kg of PM2.5 suspension liquid, respectively). Whole blood and the lung, liver, kidney, and cerebral cortex were harvested after rats were treated and sacrificed. The used heavy metals were detected using inductively coupled plasma-mass spectrometry (ICP-MS) instrument. As results, Lead was increased in the liver, lung and cerebral cortex and the level of manganese was significantly elevated in the liver and cerebral cortex in PM2.5 treated rats. Besides, arsenic was prominently enriched both in cerebral cortex and in blood, and so did the aluminum in the cerebral cortex and the copper in the liver. However, cadmium, chromium and nickel have shown no difference between the control group and the three PM2.5 treated groups. Following the exposure of PM2.5, different heavy metals are preferentially accumulated in different body tissues.

  12. Performance Evaluation of Different SRAM Cell Structures at Different Technologies

    Directory of Open Access Journals (Sweden)

    Sapna Singh, Neha Arora

    2012-03-01

    Full Text Available In recent years the demand for low power devices has been increases tremendously. To solve the power dissipation problem, many researchers have proposed different ideas from the device level to the architectural level and above. However, there is no universal way to avoid tradeoffs between power, delay and area, thus designers are required to choose appropriate techniques that satisfy application and product needs. The demand for static random-access memory (SRAM is increasing with large use of SRAM in System On-Chip and high-performance VLSI circuits. This paper represents the simulation of different SRAM cells and their comparative analysis on different parameters such as Power Supply Voltage, area efficiency etc to enhance the performance. All the simulations have been carried out on BSIM 3V3 90nm,45nm and 32 technology at Tanner EDA tool.

  13. Integration of GMR Sensors with Different Technologies.

    Science.gov (United States)

    Cubells-Beltrán, María-Dolores; Reig, Càndid; Madrenas, Jordi; De Marcellis, Andrea; Santos, Joana; Cardoso, Susana; Freitas, Paulo P

    2016-06-22

    Less than thirty years after the giant magnetoresistance (GMR) effect was described, GMR sensors are the preferred choice in many applications demanding the measurement of low magnetic fields in small volumes. This rapid deployment from theoretical basis to market and state-of-the-art applications can be explained by the combination of excellent inherent properties with the feasibility of fabrication, allowing the real integration with many other standard technologies. In this paper, we present a review focusing on how this capability of integration has allowed the improvement of the inherent capabilities and, therefore, the range of application of GMR sensors. After briefly describing the phenomenological basis, we deal on the benefits of low temperature deposition techniques regarding the integration of GMR sensors with flexible (plastic) substrates and pre-processed CMOS chips. In this way, the limit of detection can be improved by means of bettering the sensitivity or reducing the noise. We also report on novel fields of application of GMR sensors by the recapitulation of a number of cases of success of their integration with different heterogeneous complementary elements. We finally describe three fully functional systems, two of them in the bio-technology world, as the proof of how the integrability has been instrumental in the meteoric development of GMR sensors and their applications.

  14. Integration of GMR Sensors with Different Technologies

    Directory of Open Access Journals (Sweden)

    María-Dolores Cubells-Beltrán

    2016-06-01

    Full Text Available Less than thirty years after the giant magnetoresistance (GMR effect was described, GMR sensors are the preferred choice in many applications demanding the measurement of low magnetic fields in small volumes. This rapid deployment from theoretical basis to market and state-of-the-art applications can be explained by the combination of excellent inherent properties with the feasibility of fabrication, allowing the real integration with many other standard technologies. In this paper, we present a review focusing on how this capability of integration has allowed the improvement of the inherent capabilities and, therefore, the range of application of GMR sensors. After briefly describing the phenomenological basis, we deal on the benefits of low temperature deposition techniques regarding the integration of GMR sensors with flexible (plastic substrates and pre-processed CMOS chips. In this way, the limit of detection can be improved by means of bettering the sensitivity or reducing the noise. We also report on novel fields of application of GMR sensors by the recapitulation of a number of cases of success of their integration with different heterogeneous complementary elements. We finally describe three fully functional systems, two of them in the bio-technology world, as the proof of how the integrability has been instrumental in the meteoric development of GMR sensors and their applications.

  15. FLUKA Simulations of DPA in 6H-SiC Reactor Blanket Material Induced by Different Radiation Fields Frequently Mentioned in Literature

    Science.gov (United States)

    Korkut, Turgay; Korkut, Hatun

    2013-02-01

    Silicon carbide (SiC) is used extensively for the production of high-tech semiconductor devices. Today the use of this material in radiation environments such as fusion reactors creates excitement in the nuclear industry. Specific radiation types and energies which semiconductors were frequently exposed are of great value in terms of high-tech device studies. We used FLUKA simulation code to investigate radiation induced effects in 6H-SiC for different energetic protons, neutrons, photons and electrons in this paper. We analyzed displacement per atom values taking account of the simulation results in a very large perspective of radiation type and energy.

  16. Frequently used, highly appreciated?

    DEFF Research Database (Denmark)

    Swart, Joëlle; Peters, Chris; Schrøder, Kim Christian

    Digitalization has made patterns of news consumption immensely more varied than before, complicating industry attempts to adapt to changing user habits. In such a rapidly changing landscape, it is unclear how news audiences negotiate this environment and what impact this may have on the possible......, gender, region and educational level. It finds that the news media perceived most important to consumers’ everyday lives are not necessarily those consumed most frequently, challenging the notion that frequency of use and appreciation of a medium necessarily relate. In terms of the rise of social media...... news mediums become valuable in everyday life and what factors underlie this sense of value for different members of the public....

  17. Evidence for the equal resilience of Triodia spp. (Poaceae), from different functional groups, to frequent fire dating back to the late Pleistocene.

    Science.gov (United States)

    Armstrong, G

    2011-12-01

    Species with different regenerative responses to fire are hypothesised to coexist by utilising the different temporal and spatial niche opportunities created by the stochasticity of the fire regime. This is strongly supported by observations of instability of species' presence and abundance at the local scale while these are stable at the community scale. However, observations of species coexistence in fire-prone communities are limited to several decades only. To improve the robustness of this hypothesis, coalescent analysis, using chloroplast microsatellites, was undertaken on three sympatric species of Triodia from different functional groups in the fire-prone Kimberley region of Western Australia. The results inferred that T. bitextura, an obligate resprouter, Triodia sp., an obligate seeder, and T. epactia, a facultative resprouter, had mean T(mrca) values of 65k, 40k and 111k generations, respectively. Using a mutation rate of 3.2 × 10(-5) and a generation time of 5 years gave T(mrca) values of 436k, 203k and 556 k years, respectively. These results provide evidence for the coexistence of these species to the same fire regime dating back to the late Pleistocene. It also demonstrates the long-term resilience of an obligate seeder, Triodia sp., in a frequently burnt environment at the community scale.

  18. Separation Technology - Making a difference in biorefineries

    NARCIS (Netherlands)

    Kiss, Anton Alexandru; Lange, Jean Paul; Schuur, Boelo; Brilman, Derk Willem Frederik; van der Ham, Aloysius G.J.; Kersten, Sascha R.A.

    2016-01-01

    In the quest for a sustainable bio-based economy, biorefineries play a central role as they involve the sustainable processing of biomass into marketable products and energy. This paper aims to provide a perspective on applications of separations that can make a great difference in biorefineries, by

  19. Separation Technology - Making a difference in biorefineries

    NARCIS (Netherlands)

    Kiss, A.A.; Lange, J.P.; Schuur, B.; Brilman, D.W.F.; Ham, van der A.G.J.; Kersten, S.R.A.

    2016-01-01

    In the quest for a sustainable bio-based economy, biorefineries play a central role as they involve the sustainable processing of biomass into marketable products and energy. This paper aims to provide a perspective on applications of separations that can make a great difference in biorefineries, by

  20. Performance Evaluation of Frequent Subgraph Discovery Techniques

    Directory of Open Access Journals (Sweden)

    Saif Ur Rehman

    2014-01-01

    Full Text Available Due to rapid development of the Internet technology and new scientific advances, the number of applications that model the data as graphs increases, because graphs have highly expressive power to model a complicated structure. Graph mining is a well-explored area of research which is gaining popularity in the data mining community. A graph is a general model to represent data and has been used in many domains such as cheminformatics, web information management system, computer network, and bioinformatics, to name a few. In graph mining the frequent subgraph discovery is a challenging task. Frequent subgraph mining is concerned with discovery of those subgraphs from graph dataset which have frequent or multiple instances within the given graph dataset. In the literature a large number of frequent subgraph mining algorithms have been proposed; these included FSG, AGM, gSpan, CloseGraph, SPIN, Gaston, and Mofa. The objective of this research work is to perform quantitative comparison of the above listed techniques. The performances of these techniques have been evaluated through a number of experiments based on three different state-of-the-art graph datasets. This novel work will provide base for anyone who is working to design a new frequent subgraph discovery technique.

  1. SPECIES COMPOSITION OF WEED VEGETATION IN DIFFERENT APPLE GROWING TECHNOLOGIES

    Directory of Open Access Journals (Sweden)

    Venera TASSEVA

    2005-08-01

    Full Text Available The investigation was carried out in the period 2001-2003 in an orchard of the Institute of Agriculture, Kyustendil, Bulgaria, created in the spring of 1996 on leached cinnamonic forest soil. The weed populations under four different farming technologies of growing of apple cultivar Florina were investigated. It was established, that the apple growing technologies influence the weed association composition. The highest weed diversity was found in the organic technology - 16 weed species were found. In the application of resource economical and integrated technologies, the development of 13-14 weed species was established. The smallest weed diversity was observed in the conventional technology - eight species, which was due to the twofold herbicide application.

  2. Emergy Evaluation of Different Straw Reuse Technologies in Northeast China

    Directory of Open Access Journals (Sweden)

    Xiaoxian Zhang

    2015-08-01

    Full Text Available Open burning of straw in China has degraded agricultural environments and has become a contributor to air pollution. Development of efficient straw-reuse technologies not only can yield economic benefits but also can protect the environment and can provide greater benefit to society. Thus, the overall benefits of straw-reuse technologies must be considered when making regional development planning and enterprise technology decisions. In addition, agricultural areas in China cross several climatic zones and have different weather characteristics and cultural conditions. In the present study, we assessed five types of straw-reuse technologies (straw-biogas production, -briquetting, -based power generation, -gasification, and -bioethanol production, using emergy analysis, in northeast China. Within each type, five individual cases were investigated, and the highest-performing cases were used for comparison across technologies. Emergy indices for comprehensive benefits for each category, namely, EYR, ELR, and ESI were calculated. Calculated indices suggest that straw-briquetting and -biogas production are the most beneficial technologies in terms of economy, environmental impact, and sustainability compared to straw-based power generation, -gasification, and -bioethanol production technologies. These two technologies can thus be considered the most suitable for straw reuse in China.

  3. Rapid identification of Candida spp. frequently involved in invasive mycoses by using flow-through hybridization and Gene Chip (FHGC) technology.

    Science.gov (United States)

    Li, Chen; Ding, Xiurong; Liu, Zhizhong; Zhu, Juanjuan

    2017-01-01

    The incidence of invasive fungal infections in immunocompromised patients has increased in recent decades. Rapid and accurate identification of these pathogenic fungi is crucial for initiating a timely, safe, and effective antifungal therapy. Here we developed a microarray based on flow-through hybridization gene chip technology. The microarray was tested for its specificity using a panel of reference and blinded clinical isolates. The results proved that this microarray was highly discriminative, leading to the unequivocal identification of each species, including Candida famata and the highly related species Candida parapsilosis, Candida orthopsilosis, and Candida metapsilosis. This new system represents a reliable method that is of potential use in clinical laboratories for the simultaneous detection and identification of the most common pathogenic fungi. Copyright © 2016 Elsevier B.V. All rights reserved.

  4. Gender Differences in Attitudes towards Learning Oral Skills Using Technology

    Science.gov (United States)

    Harb, Jibrel; Abu Bakar, Nadzrah; Krish, Pramela

    2014-01-01

    This paper reports a quantitative study on gender differences in attitudes when learning oral skills via technology. The study was conducted at Tafila Technical University, Jordan, with 70 female and 30 male students, to find out if female students are better and faster in learning a language than male. Specifically, it seeks to investigate…

  5. Forecasting the Development of Different Solar Cell Technologies

    Directory of Open Access Journals (Sweden)

    Arturo Morales-Acevedo

    2013-01-01

    Full Text Available Solar cells are made of several materials and device structures with the main goal of having maximum efficiency at low cost. Some types of solar cells have shown a rapid efficiency progress whereas others seem to remain constant as a consequence of different factors such as the technological and economic ones. Using information published by the National Renewable Energy Laboratory (NREL about the increase of solar cells record efficiency, we apply a simple mathematical model to estimate the evolution in the near future for the different cell technologies. Here, as an example, we use data for solar cells made with representative materials and structures of each of the three “PV generations.”

  6. Capacitive technology for energy extraction from chemical potential differences

    OpenAIRE

    Bastos Sales, B.

    2013-01-01

    This thesis introduces the principle of Capacitive energy extraction based on Donnan Potential (CDP) to exploit salinity gradients. It also shows the fundamental characterization and improvements of CDP. An alternative application of this technology aimed at thermal gradients was tested.   Chapter 2 introduces the principle and initial tests. The entropy increase of mixing two solutions of different salt concentrations can be harnessed to generate electrical energy. Worldwide, the potent...

  7. Forecasting the Development of Different Solar Cell Technologies

    OpenAIRE

    Arturo Morales-Acevedo; Gaspar Casados-Cruz

    2013-01-01

    Solar cells are made of several materials and device structures with the main goal of having maximum efficiency at low cost. Some types of solar cells have shown a rapid efficiency progress whereas others seem to remain constant as a consequence of different factors such as the technological and economic ones. Using information published by the National Renewable Energy Laboratory (NREL) about the increase of solar cells record efficiency, we apply a simple mathematical model to estimate the ...

  8. Differences among formulary submission guidelines: implications for health technology assessment.

    Science.gov (United States)

    Mauskopf, Josephine; Walter, Jeffrey; Birt, Julie; Bowman, Lee; Copley-Merriman, Catherine; Drummond, Michael

    2011-07-01

    This article provides a detailed understanding of the differences in selected formulary submission guidelines supplied by various health technology assessment (HTA) agencies and indicates how these differences can impact the evidence base used to populate the HTA. Detailed summaries of the recommended methods for evidence generation, organized by topic areas relevant for clinical and economic data, for twelve countries in Europe, North America, and Australia where HTA processes are well developed were prepared. Using these summaries, we provide examples of the likely impact these differences in recommended methods could have on the evidence base used to evaluate new health technologies. Areas where recommendations differed included methodologies for systematic literature reviews (e.g., preferred databases and study designs for inclusion); selection of appropriate comparators; guidance on critical appraisal and synthesis of clinical evidence; appropriate sources for health value measures, resource use, and cost data; and approaches to uncertainty analyses. Performing literature searches that capture all relevant studies and then creating subsets of the literature based on a listing of country-specific requirements could allow for direct comparison of the evidence bases associated with the different guidelines. If the formulary submission guidelines were followed as written, different (although overlapping) bodies of evidence likely would be generated for each country, which could contribute to disparate assessments and recommendations. This comparison of the formulary submission guidelines could contribute to an understanding of why clinical and reimbursement decisions vary across countries.

  9. Scalable Frequent Subgraph Mining

    KAUST Repository

    Abdelhamid, Ehab

    2017-06-19

    A graph is a data structure that contains a set of nodes and a set of edges connecting these nodes. Nodes represent objects while edges model relationships among these objects. Graphs are used in various domains due to their ability to model complex relations among several objects. Given an input graph, the Frequent Subgraph Mining (FSM) task finds all subgraphs with frequencies exceeding a given threshold. FSM is crucial for graph analysis, and it is an essential building block in a variety of applications, such as graph clustering and indexing. FSM is computationally expensive, and its existing solutions are extremely slow. Consequently, these solutions are incapable of mining modern large graphs. This slowness is caused by the underlying approaches of these solutions which require finding and storing an excessive amount of subgraph matches. This dissertation proposes a scalable solution for FSM that avoids the limitations of previous work. This solution is composed of four components. The first component is a single-threaded technique which, for each candidate subgraph, needs to find only a minimal number of matches. The second component is a scalable parallel FSM technique that utilizes a novel two-phase approach. The first phase quickly builds an approximate search space, which is then used by the second phase to optimize and balance the workload of the FSM task. The third component focuses on accelerating frequency evaluation, which is a critical step in FSM. To do so, a machine learning model is employed to predict the type of each graph node, and accordingly, an optimized method is selected to evaluate that node. The fourth component focuses on mining dynamic graphs, such as social networks. To this end, an incremental index is maintained during the dynamic updates. Only this index is processed and updated for the majority of graph updates. Consequently, search space is significantly pruned and efficiency is improved. The empirical evaluation shows that the

  10. [Studies on purgative activity of rhubarb extracts by different technologies].

    Science.gov (United States)

    Zheng, Zhihua; Zhu, Chenchen; Gui, Shuhua; Lin, Chaozhan

    2002-08-01

    To study on purgative activity of rhubarb extracts by solvent extraction, SFE-CO2 and SFE-CO2 & residue resin purification. The effects of the extracts by the three technologies on creepage of mouse small intestine and rat large intestine were studied by injecting charcoal ink into the intestines. And the volume of the mouse small intestine was observed. The effects of the extracts were also studied on water absorption of mouse small intestine and large intestine by weighing the intestines. The purgative activity of the extracts by the three technologies was SFE-CO2 & residue resin purification > solvent extraction > SFE-CO2. Extracting different polar components separately might get a good result.

  11. Optical Characterization of Different Thin Film Module Technologies

    Directory of Open Access Journals (Sweden)

    R. Ebner

    2015-01-01

    Full Text Available For a complete quality control of different thin film module technologies (a-Si, CdTe, and CIS a combination of fast and nondestructive methods was investigated. Camera-based measurements, such as electroluminescence (EL, photoluminescence (PL, and infrared (IR technologies, offer excellent possibilities for determining production failures or defects in solar modules which cannot be detected by means of standard power measurements. These types of optical measurement provide high resolution images with a two-dimensional distribution of the characteristic features of PV modules. This paper focuses on quality control and characterization using EL, PL, and IR imaging with conventional cameras and an alternative excitation source for the PL-setup.

  12. Comparison of the effectiveness of different antimicrobial surface technologies

    Directory of Open Access Journals (Sweden)

    Buhl Sebastian

    2017-09-01

    Full Text Available The risk of infection via microbiologically contaminated surfaces has already been demonstrated by other publications. In this work two different antibacterial surface technologies transition metalloacids (AMiSTec and TiO2/AgNO3 (Health Complete were compared regarding feasibility as well as their advantages and disadvantages. The examination of the antimicrobial activity was assessed according to the JIS Z 2801. We could demonstrate that all of our tested samples showed a strong antimicrobial activity (>log 3 germ reduction in the JIS experiments. Furthermore this strong antibacterial effect could be shown already after <30min incubation and at low light intensity (approx. 300 Lux for the TiO2/AgNO3 samples. Both technologies provide a high potential for an improved infection control for example in a high risk environment like operation rooms or intensive care units.

  13. How do frequent users of crisis helplines differ from other users regarding their reasons for calling? Results from a survey with callers to Lifeline, Australia's national crisis helpline service.

    Science.gov (United States)

    Middleton, Aves; Woodward, Alan; Gunn, Jane; Bassilios, Bridget; Pirkis, Jane

    2017-05-01

    Crisis helplines are designed to provide short-term support to people in an immediate crisis. However, there is a group of users who call crisis helplines frequently over an extended period of time. The reasons for their ongoing use remain unclear. The aim of this study was to investigate the differences in the reasons for calling between frequent and other users of crisis helplines. This was achieved by examining the findings from a brief survey completed by callers to Lifeline Australia at the end of their call between February and July 2015. In the survey, callers reported on their socio-demographics, reasons for their current call and number of calls made in the past month. Survey respondents were categorised as frequent, episodic and one-off users, and analyses were conducted using ordered logistic regression. Three hundred and fifteen callers completed the survey, which represented 57% of eligible callers. Twenty-two per cent reported calling 20 times or more in the past month (frequent users), 51% reported calling between 2 and 19 times (episodic users) and 25% reported calling once (one-off users). Two per cent were unable to recall the number of calls they made in the past month. Frequent users reported similar reasons for calling as other users but they were more likely to call regularly to talk about their feelings [OR = 6.0; 95% CI: 3.7-9.8]. This pattern of service use is at odds with the current model of care offered by crisis helplines which is designed to provide one-off support. There is a need to investigate further the factors that drive frequent users to call crisis helplines regularly. © 2016 John Wiley & Sons Ltd.

  14. Gender-Based Motivational Differences in Technology Education

    Science.gov (United States)

    Virtanen, Sonja; Räikkönen, Eija; Ikonen, Pasi

    2015-01-01

    Because of a deeply gendered history of craft education in Finland, technology education has a strong gender-related dependence. In order to motivate girls into pursuing technological studies and to enable them to see their own potential in technology, gender sensitive approaches should be developed in technology education. This study explores…

  15. Gender Differences in Attitudes Toward Science and Technology Among Majors

    Science.gov (United States)

    Gokhale, Anu A.; Rabe-Hemp, Cara; Woeste, Lori; Machina, Kenton

    2015-08-01

    In the USA, women have consistently been proportionally underrepresented in science and technology (S&T). In these disciplines, as students move from high schools to colleges to graduate programs, qualified women drop out at higher rates than do men, resulting in a striking loss of talented students. Attitude toward a discipline is one of the major factors in students' choice of majors. As a result, attitudes toward S&T are issues with longstanding attention and interest in education research. Retention of female students in S&T majors remains a major concern. The purpose of the study was to investigate attitudes toward S&T including attitudes toward female participation in S&T, among S&T majors, and examine differences by gender and class standing. Such an investigation would provide deeper insights to help devise strategies to retain women in S&T majors.

  16. IMS Learning Design Frequently Asked Questions

    NARCIS (Netherlands)

    Tattersall, Colin; Manderveld, Jocelyn; Hummel, Hans; Sloep, Peter; Koper, Rob; De Vries, Fred

    2004-01-01

    This list of frequently asked questions was composed on the basis of questions asked of the Educational Technology Expertise Centrum. The questions addessed are: Where can I find the IMS Learning Design Specification? What is meant by the phrase “Learning Design”? What is the IMS LD Specification ab

  17. Generational Differences in Technology Adoption in Community Colleges

    Science.gov (United States)

    Rosario, Victoria C.

    2012-01-01

    This research study investigated the technological perceptions and expectations of community college students, faculty, administrators, and Information Technology (IT) staff. The theoretical framework is based upon two assumptions on the process of technological innovation: it can be explained by diffusion of adoption theory, and by studying the…

  18. Frequent Itemset Hiding Algorithm Using Frequent Pattern Tree Approach

    Science.gov (United States)

    Alnatsheh, Rami

    2012-01-01

    A problem that has been the focus of much recent research in privacy preserving data-mining is the frequent itemset hiding (FIH) problem. Identifying itemsets that appear together frequently in customer transactions is a common task in association rule mining. Organizations that share data with business partners may consider some of the frequent…

  19. Frequent Itemset Hiding Algorithm Using Frequent Pattern Tree Approach

    Science.gov (United States)

    Alnatsheh, Rami

    2012-01-01

    A problem that has been the focus of much recent research in privacy preserving data-mining is the frequent itemset hiding (FIH) problem. Identifying itemsets that appear together frequently in customer transactions is a common task in association rule mining. Organizations that share data with business partners may consider some of the frequent…

  20. Emergy Evaluation of Different Straw Reuse Technologies in Northeast China

    OpenAIRE

    Xiaoxian Zhang; Fang Ma

    2015-01-01

    Open burning of straw in China has degraded agricultural environments and has become a contributor to air pollution. Development of efficient straw-reuse technologies not only can yield economic benefits but also can protect the environment and can provide greater benefit to society. Thus, the overall benefits of straw-reuse technologies must be considered when making regional development planning and enterprise technology decisions. In addition, agricultural areas in China cross several clim...

  1. [Osmolality of frequently consumed beverages].

    Science.gov (United States)

    Dini, Elizabeth; De Abreu, Jorge; López, Emeris

    2004-12-01

    The objective of this work was to determine the osmolality of beverages frequently consumed by children and adolescents due to the scarce information available in our country. The samples were grouped as follows: milks; refreshments; beverages based on fruits, vegetables, cereals, and tubers; sport drinks; energizing drinks; oral rehydrating solutions; reconstituted drinks and infusions. A vapor pressure digital osmometer was used, five samples of each beverage from different lots were analyzed. Four osmolality determinations were made on each sample and the average of such values was calculated. When the variation coefficient of the osmolality measurements of the five samples was higher than 10%, five additional samples were analyzed. As many samples as possible were used with breast milk in the time period of the study. Osmolality averages, standard deviation, and the osmolality confidence intervals (95% reliability) were calculated. The osmolality (mmol/kg) of breast milk and that of cow milk were between 273 and 389; refreshments, white, black and flavored colas, and malts ranged between 479-811; and soda and light drinks: 44-62; fresh fruit and commercial drinks (coconut, peach, apple, orange, pear, pineapple, grape, plum, tamarind): 257-1152 and light juices: 274; sports beverages: 367; energizing drinks: 740; drinks based on vegetables and cereals: 213-516; oral rehydrating solutions: 236-397; reconstituted drinks: 145; infusions: 25. Beverages with adequate osmolality levels for children were: milks, light refreshments, soda, fresh and light juices, oral rehydrating, soy, and reconstituted drinks and infusions.

  2. Cold oxygen plasma technology efficiency against different airborne respiratory viruses.

    Science.gov (United States)

    Terrier, O; Essere, B; Yver, M; Barthélémy, M; Bouscambert-Duchamp, M; Kurtz, P; VanMechelen, D; Morfin, F; Billaud, G; Ferraris, O; Lina, B; Rosa-Calatrava, M; Moules, V

    2009-06-01

    Respiratory infections caused by viruses are major causes of upper and lower respiratory tract infections. They account for an important mortality and morbidity worldwide. Amongst these viruses, influenza viruses and paramyxoviruses are major pathogens. Their transmission is mainly airborne, by direct transmission through droplets from infected cases. In the context of an influenza pandemic, as well as for the reduction of nosocomial infections, systems that can reduce or control virus transmission will reduce the burden of this disease. It may also be part of the strategy for pandemic mitigation. A new system based on physical decontamination of surface and air has been developed. This process generates cold oxygen plasma (COP) by subjecting air to high-energy deep-UV light. To test its efficiency, we have developed an experimental device to assess for the decontamination of nebulized respiratory viruses. High titer suspensions of influenza virus type A, human parainfluenza virus type 3 and RSV have been tested. Different experimental conditions have been evaluated against these viruses. The use of COP with an internal device allowed the best results against all viruses tested. We recorded a reduction of 6.5, 3.8 and 4 log(10) TCID50/mL of the titre of the hPIV-3, RSV and influenza virus A (H5N2) suspensions. The COP technology is an efficient and innovative strategy to control airborne virus dissemination. It could successfully control nosocomial diffusion of respiratory viruses in hospital setting, and could be useful for the reduction of influenza transmission in the various consultation settings implemented for the management of cases during a pandemic.

  3. Make difference : Deafness and video technology at work

    OpenAIRE

    Cupitt, Rebekah

    2017-01-01

    Video meetings are a regular part of work at Swedish television’s editorial for programming in Swedish Sign Language (SVT Teckenspråk). In the process of creating television programming in Swedish Sign Language, SVT employees communicate with and through technologies. This ethnographic exploration of video meetings at SVT Teckenspråk presents how deafness is reconfigured between hearing, interpreters, and video meeting technology within the context of a public service organisation. Concepts s...

  4. Cost, Time, and Risk Assessment of Different Wave Energy Converter Technology Development Trajectories: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Weber, Jochem W [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Laird, Daniel [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Costello, Ronan [Wave Venture; Roberts, Jesse [Sandia National Laboratories; Bull, Diana [Sandia National Laboratories; Babarit, Aurelien [Ecole Centrale de Nantes; Nielsen, Kim [Ramboll; Ferreira, Claudio Bittencourt [DNV-GL; Kennedy, Ben [Wave Venture

    2017-09-14

    This paper presents a comparative assessment of three fundamentally different wave energy converter technology development trajectories. The three technology development trajectories are expressed and visualised as a function of technology readiness levels and technology performance levels. The assessment shows that development trajectories that initially prioritize technology readiness over technology performance are likely to require twice the development time, consume a threefold of the development cost, and are prone to a risk of technical or commercial failure of one order of magnitude higher than those development trajectories that initially prioritize technology performance over technology readiness.

  5. LGBT Caregiving: Frequently Asked Questions

    Science.gov (United States)

    ... FCA - A A + A You are here Home LGBT Caregiving: Frequently Asked Questions Order this publication Printer- ... service or organization is open to working with LGBT families? Kudos to you for managing to “go ...

  6. Frequent Questions About Universal Waste

    Science.gov (United States)

    Frequent questions such as Who is affected by the universal waste regulations? What is “mercury-containing equipment”? How are waste batteries managed under universal waste? How are waste pesticides managed under universal waste?

  7. Climate Leadership Awards Frequent Questions

    Science.gov (United States)

    Provides answers to frequently asked questions regarding the Climate Leadership Awards, sponsored by EPA's Center for Corporate Climate Leadership with co-sponsorship from the Center for Climate and Energy Solutions and The Climate Registry.

  8. Frequently Asked Questions about Pharmacogenomics

    Science.gov (United States)

    ... Care Specific Genetic Disorders Frequently Asked Questions About Pharmacogenomics Enlarge What is pharmacogenomics? What might pharmacogenomics mean ... page, you will need Adobe Reader. What is pharmacogenomics? Pharmacogenomics uses information about a person's genetic makeup, ...

  9. Comparing Productivity Simulated with Inventory Data Using Different Modelling Technologies

    Science.gov (United States)

    Klopf, M.; Pietsch, S. A.; Hasenauer, H.

    2009-04-01

    The Lime Stone National Park in Austria was established in 1997 to protect sensible lime stone soils from degradation due to heavy forest management. Since 1997 the management activities were successively reduced and standing volume and coarse woody debris (CWD) increased and degraded soils began to recover. One option to study the rehabilitation process towards natural virgin forest state is the use of modelling technology. In this study we will test two different modelling approaches for their applicability to Lime Stone National Park. We will compare standing tree volume simulated resulting from (i) the individual tree growth model MOSES, and (ii) the species and management sensitive adaptation of the biogeochemical-mechanistic model Biome-BGC. The results from the two models are compared with filed observations form repeated permanent forest inventory plots of the Lime Stone National Park in Austria. The simulated CWD predictions of the BGC-model were compared with dead wood measurements (standing and lying dead wood) recorded at the permanent inventory plots. The inventory was established between 1994 and 1996 and remeasured from 2004 to 2005. For this analysis 40 plots of this inventory were selected which comprise the required dead wood components and are dominated by a single tree species. First we used the distance dependant individual tree growth model MOSES to derive the standing timber and the amount of mortality per hectare. MOSES is initialized with the inventory data at plot establishment and each sampling plot is treated as forest stand. The Biome-BGC is a process based biogeochemical model with extensions for Austrian tree species, a self initialization and a forest management tool. The initialization for the actual simulations with the BGC model was done as follows: We first used spin up runs to derive a balanced forest vegetation, similar to an undisturbed forest. Next we considered the management history of the past centuries (heavy clear cuts

  10. Capacitive technology for energy extraction from chemical potential differences

    NARCIS (Netherlands)

    Bastos Sales, B.

    2013-01-01

    This thesis introduces the principle of Capacitive energy extraction based on Donnan Potential (CDP) to exploit salinity gradients. It also shows the fundamental characterization and improvements of CDP. An alternative application of this technology aimed at thermal gradients was tested.  

  11. Gender Differences in Attitudes toward Science and Technology among Majors

    Science.gov (United States)

    Gokhale, Anu A.; Rabe-Hemp, Cara; Woeste, Lori; Machina, Kenton

    2015-01-01

    In the USA, women have consistently been proportionally underrepresented in science and technology (S&T). In these disciplines, as students move from high schools to colleges to graduate programs, qualified women drop out at higher rates than do men, resulting in a striking loss of talented students. Attitude toward a discipline is one of the…

  12. Technologies of Difference: Reading the Virtual Age through Sexual (In)Difference.

    Science.gov (United States)

    Webb, Patricia

    2003-01-01

    Uses disparate parts of Luce Irigaray's philosophical, psychological, and metaphorical writing about man's desire to control woman, the Other. Pieces together a poststructuralist vision of technology by looking at the desire to control the Other and at the desire to control technology - man's desire to control technology and/or woman. Concludes…

  13. Efficient Frequent Pattern Tree Construction

    Directory of Open Access Journals (Sweden)

    D.Bujji Babu

    2014-03-01

    Full Text Available Association rule learning is a popular and well researched technique for discovering interesting relations between variables in large databases in the area of data mining. The association rules are a part of intelligent systems. Association rules are usually required to satisfy a user-specified minimum support and a user-specified minimum confidence at the same time. Apriori and FP-Growth algorithms are very familiar algorithms for association rule mining. In this paper we are more concentrated on the Construction of efficient frequent pattern trees. Here, we present the novel frequent pattern trees and the performance issues. The proposed trees are fast and efficient trees helps to extract the frequent patterns. This paper provides the major advantages in the FP-Growth algorithm for association rule mining with using the newly proposed approach.

  14. FDI technology spillover and threshold effect of the technology gap: regional differences in the Chinese industrial sector.

    Science.gov (United States)

    Wang, Hui; Liu, Huifang; Cao, Zhiyong; Wang, Bowen

    2016-01-01

    This paper presents a new perspective that there is a double-threshold effect in terms of the technology gap existing in the foreign direct investment (FDI) technology spillover process in different regional Chinese industrial sectors. In this paper, a double-threshold regression model was established to examine the relation between the threshold effect of the technology gap and technology spillover. Based on the provincial panel data of Chinese industrial sectors from 2000 to 2011, the empirical results reveal that there are two threshold values, which are 1.254 and 2.163, in terms of the technology gap in the industrial sector in eastern China. There are also two threshold values in both the central and western industrial sector, which are 1.516, 2.694 and 1.635, 2.714, respectively. The technology spillover is a decreasing function of the technology gap in both the eastern and western industrial sectors, but a concave curve function of the technology gap is in the central industrial sectors. Furthermore, the FDI technology spillover has increased gradually in recent years. Based on the empirical results, suggestions were proposed to elucidate the introduction of the FDI and the improvement in the industrial added value in different regions of China.

  15. Differences in glance behavior between drivers using a rearview camera, parking sensor system, both technologies, or no technology during low-speed parking maneuvers.

    Science.gov (United States)

    Kidd, David G; McCartt, Anne T

    2016-02-01

    This study characterized the use of various fields of view during low-speed parking maneuvers by drivers with a rearview camera, a sensor system, a camera and sensor system combined, or neither technology. Participants performed four different low-speed parking maneuvers five times. Glances to different fields of view the second time through the four maneuvers were coded along with the glance locations at the onset of the audible warning from the sensor system and immediately after the warning for participants in the sensor and camera-plus-sensor conditions. Overall, the results suggest that information from cameras and/or sensor systems is used in place of mirrors and shoulder glances. Participants with a camera, sensor system, or both technologies looked over their shoulders significantly less than participants without technology. Participants with cameras (camera and camera-plus-sensor conditions) used their mirrors significantly less compared with participants without cameras (no-technology and sensor conditions). Participants in the camera-plus-sensor condition looked at the center console/camera display for a smaller percentage of the time during the low-speed maneuvers than participants in the camera condition and glanced more frequently to the center console/camera display immediately after the warning from the sensor system compared with the frequency of glances to this location at warning onset. Although this increase was not statistically significant, the pattern suggests that participants in the camera-plus-sensor condition may have used the warning as a cue to look at the camera display. The observed differences in glance behavior between study groups were illustrated by relating it to the visibility of a 12-15-month-old child-size object. These findings provide evidence that drivers adapt their glance behavior during low-speed parking maneuvers following extended use of rearview cameras and parking sensors, and suggest that other technologies which

  16. The Most Frequent English Homonyms

    Science.gov (United States)

    Parent, Kevin

    2012-01-01

    This article distinguishes homonymy, homophony, homography and polysemy, and provides a list of the most frequent homonyms using corpus-derived data. For most of the homonyms, the most common meaning accounts for 90% or more of the total uses of the form. The pedagogical and research implications of these findings are discussed. (Contains 5…

  17. How to find frequent patterns?

    NARCIS (Netherlands)

    W.H.L.M. Pijls (Wim); W.A. Koster

    2005-01-01

    textabstractAn improved version of DF, the depth-first implementation of Apriori, is presented. Given a database of (e.g., supermarket) transactions, the DF algorithm builds a so-called trie that contains all frequent itemsets, i.e., all itemsets that are contained in at least `minsup' transacti

  18. Distracted: Academic Performance Differences between Teen Users and Non-Users of MySpace and other Communication Technology

    Directory of Open Access Journals (Sweden)

    Tamyra A. Pierce

    2008-06-01

    Full Text Available This study examined the differences in academic performance between teen users and non-users of various communication technologies. Participants included 517 high school students who completed a self-report survey. The results revealed that approximately 3/4 of the teens had a MySpace account and a cell phone and more than 1/2 had an IM account. Results also showed that those who had a MySpace account, cell phone and IM had signifi cantly lower grades than those who did not. Results also revealed that teens who used their MySpace, cell phone and IM while doing their homework reported having lower grades than those who did not use the technology while doing their homework. In addition, those who put off doing their homework to spend time on MySpace also reported lower grades than those who did not put off doing their homework to spend time with MySpace. Finally, results showed that 28% text messaged during class from always to frequently, and 5% reported text messaging during an exam from always to frequently.

  19. Comparison of different technologies for high-quality optical coatings

    Science.gov (United States)

    Flory, Francois

    1990-08-01

    Modern optical systems require still higher quality optical coatings. Conventional production techniques are not able to give such high quality layers. One of the main defaults comes from the relatively porous structure of the thin films; as a consequence the sensitiveness of the materials to the moisture gives noticeably unstable properties versus time. In this work, after a very short review of the different techniques nowaday used to perform high quality optical thin films, we will be especially interested in oxide layer production (Si02, Ta2O5, Ti02). To give a good comparison of the performances obtained with techniques such as TAD and ion plating we need extremely powerful characterization means: - In vacuo measurements of optical properties allowing the study of spontaneous water adsorption during air entrance; - Absorption measurement with photothermal deflection spectroscopy; - Scattering losses measurements and consequently determination of the grain size of the microstructure. Refractive index measurements, and optical anisotropy determined by guided mode study. Finally some views from electron microscopy justify the validity of the model used with our characterization techniques. To end, we will show the interest of ion plating technique when we are looking for very uniform deposition on large surfaces.

  20. Fault Tolerant Frequent Pattern Mining

    Energy Technology Data Exchange (ETDEWEB)

    Shohdy, Sameh; Vishnu, Abhinav; Agrawal, Gagan

    2016-12-19

    FP-Growth algorithm is a Frequent Pattern Mining (FPM) algorithm that has been extensively used to study correlations and patterns in large scale datasets. While several researchers have designed distributed memory FP-Growth algorithms, it is pivotal to consider fault tolerant FP-Growth, which can address the increasing fault rates in large scale systems. In this work, we propose a novel parallel, algorithm-level fault-tolerant FP-Growth algorithm. We leverage algorithmic properties and MPI advanced features to guarantee an O(1) space complexity, achieved by using the dataset memory space itself for checkpointing. We also propose a recovery algorithm that can use in-memory and disk-based checkpointing, though in many cases the recovery can be completed without any disk access, and incurring no memory overhead for checkpointing. We evaluate our FT algorithm on a large scale InfiniBand cluster with several large datasets using up to 2K cores. Our evaluation demonstrates excellent efficiency for checkpointing and recovery in comparison to the disk-based approach. We have also observed 20x average speed-up in comparison to Spark, establishing that a well designed algorithm can easily outperform a solution based on a general fault-tolerant programming model.

  1. Calibrating a Measure of Gender Differences in Motivation for Learning Technology

    Science.gov (United States)

    Hwang, Young Suk; Fisher, William; Vrongistinos, Konstantinos

    2009-01-01

    This paper reports on the theory, design, and calibration of an instrument for measuring gender difference in motivation for learning technology. The content of the instrument was developed based upon the motivational theories of Eccles and others. More specifically, the learners' self-concept of ability, perception of technology, perception of…

  2. Differences in Adaptive Competency Acquisition between Traditionally Certified and Alternatively Certified Technology Education Teachers.

    Science.gov (United States)

    Coyle-Rogers, Patricia G.; Rogers, George E.

    A study determined whether there are any differences in the adaptive competency acquisition between technology education teachers who have completed a school district add-on alternative certification process and technology education teachers who completed a traditional baccalaureate degree certification program. Non-probability sampling was used…

  3. Students' Age Difference of Confidence in Using Technology for Learning in Higher Education

    Science.gov (United States)

    Yau, Hon Keung; Cheng, Alison Lai Fong

    2012-01-01

    Some past studies find that older students have more confidence in using technology for learning than younger students but some other studies find the opposite result. However, it is found that there are a few researches studying on the age difference in the perception of using technology for learning in Hong Kong. Therefore, the aim of the study…

  4. Perceived Playfulness, Gender Differences and Technology Acceptance Model in a Blended Learning Scenario

    Science.gov (United States)

    Padilla-Melendez, Antonio; del Aguila-Obra, Ana Rosa; Garrido-Moreno, Aurora

    2013-01-01

    The importance of technology for education is increasing year-by-year at all educational levels and particularly for Universities. This paper reexamines one important determinant of technology acceptance and use, such as perceived playfulness in the context of a blended learning setting and reveals existing gender differences. After a literature…

  5. The frequent occurrence of MIC

    Energy Technology Data Exchange (ETDEWEB)

    Graff, Matthias [Gesellschaft fuer Technische Mikrobiologie und Hygieneueberwachung - Dr. Graff und Partner, Stadtweg 9, D-38176 Wendeburg (Germany); Neubert, Volkmar [Institut fuer Materialpruefung und Werkstofftechnik Dr. Doelling und Dr. Neubert GmbH, Freiberger Strasse 1, D-38678 Clausthal-Zellerfeld (Germany)

    2004-07-01

    Microbial induced corrosion (MIC) is not as rare as many materials scientist and corrosion practitioners do believe. It is not an exotic and scarce event, but can be found frequently in many fields of corrosion research, provided that it is looked for. The reason for the relatively few descriptions of MIC cases seems to be the fact, that the microbiological approach is not widely known and applied in the world of materials science. MIC is not so much a corrosion mechanism on its own, but it enhances the corrosion rates of the 'normal' mechanisms to such an extent, that in some cases 'incredible' fast corrosion progress can be observed. The reason is the microorganisms' function as bio-catalysts: Chemical reactions, which are very slow under normal chemical conditions can be highly accelerated by living organisms. Besides that, several microorganisms do produce very corrosive substances which in natural environments do not occur without the activity of microorganisms, e. g. sulfuric or nitric acid. We want to point out, that it can be very worthy to take microbial induced corrosion into account. MIC is not the general answer for all unsolved corrosion problems, but to think about it helps in many corrosion cases as the authors had to experience. The initial indication for the presence of MIC are markedly increased corrosion rates. In the following, some of our 'lessons' are presented as short case studies: Two of them deal with steel corrosion characterized by increased corrosion rates. The third example presents corrosion damage of aluminium structures, where from a technical point of view corrosion was not expected, least of all microbial induced corrosion. (authors)

  6. Carcinoid Tumor: Frequently Asked Questions

    Science.gov (United States)

    ... low doses of niacin to prevent subclinical pellagra. Niacinamide Should I take niacin or niacinamide if 50 mg of niacin in my multi- ... dose to prevent flushing or else do use niacinamide. The mechanism of niacin flush is quite different ...

  7. The experimental verification of the condition of the magnetic material caused by different technological processes

    CERN Document Server

    Tumanski, S

    2000-01-01

    The changes of electrical steel parameters caused by different technological processes have been tested using the magnetovision method. The effects of cutting into the strips, stamping the shape, laser scribing, annealing, bending and stressing have been investigated.

  8. CHANGES IN FATTY ACID COMPOSITION OF DIFFERENT MILK PRODUCTS CAUSED BY DIFFERENT TECHNOLOGY

    Directory of Open Access Journals (Sweden)

    Rozália Veronika Salamon

    2007-06-01

    Full Text Available The fatty acid composition of cow’s milk with fat contents of 3.6%, Dalia cheese with fat contents of 44%, butter with fat contents of 80% and margarine with fat contents of 24% was determined after a heat treatment performed on cooking plate and microwave treatment, respectively of different durations. The biggest difference was obtained for oleic acid and elaidic acid since, with the exception of the margarine, in each case proportion of the cis-configurated oleic acid decreased while that of the trans-configurated elaidic acid increased. For all of the other fatty acids in the foodstuffs examined no such differences were obtained regarding change in fatty acid composition whose differences could influence healthy nutrition to considerable extent. Therefore we can take it as a fact that neither heat treatment performed on a traditional cooking plate nor microwave treatment affects considerably the composition of food fats.

  9. Solar Wear Tattoo: New Technology Through the use of Different Material Behaviours

    Directory of Open Access Journals (Sweden)

    Mendes Vanessa da Graça

    2017-01-01

    Full Text Available This study comes within the framework of a PhD course in Design, which is the continuation of a Masters Degree research in Fashion Design, searching for wardrobe technology and innovation through material behaviour. The intent of this project is to present solutions that promote a new and versatile product allowing for a different kind of aesthetic. This will be achieved through different materials with different behaviours that when put together create an innovative technology thus creating a new practice of body art, through the use of fashionable beachwear created with this technology. This technology allows the transformation of the suntan marks left by female swimwear. This will result in the creation of designs and drawings on the body, using shapes inspired by the Oriental Zodiac Signs, as well as colours drawn from the five elements of Feng Shui, which are also present in the Western Astrological Signs.

  10. Annual energy yield of different photovoltaic technologies at different climatic conditions; Jahresenergieertraege unterschiedlicher Photovoltaik-Technologien bei verschiedenen klimatischen Bedingungen

    Energy Technology Data Exchange (ETDEWEB)

    Zinsser, Bastian

    2010-10-04

    It is very important for engineers as well as for investors to know which amount of energy E [kWh] a photovoltaic (PV) system produces under real operating conditions. In most cases the costs [Euroct/kWh] for the solar electricity are the main question. Most data sheets contain the efficiency of the PV modules only for standard test conditions (STC) in the laboratory. In reality higher module temperatures, lower irradiation G and a modified spectrum of the irradiation G change the standard test conditions efficiency. However, standard test conditions never appear at real live in Germany. In southern countries, which have more sun, the operation conditions differ much more from standard test conditions. Therefore, the effects on the annual energy yield are even bigger. To answer the question which PV technology gives the highest energy yield at specific climate conditions, this thesis set up thirteen PV systems using different technologies in Stuttgart, Nicosia, and Cairo. An extensive data acquisition is added to monitor weather and system data. Mono- and multicrystalline silicon (Si) as well as several thin film technologies like amorphous silicon, Cu(InGa)Se{sub 2} (CIGS), and CdTe are investigated. First the thesis extracts the temperature and low light behavior from the measured field data. At the end it models the PV systems to forecast the annual energy yield EJahr and compares with the measured values. The analysis of the field data reconfirms the better temperature behavior of the thin film technologies reported in literature. The HIT technology exhibits a better low light behavior, than the crystalline Si technologies, which all show a similar low light behavior. In the field the CIGS technology shows a contrary low light behavior compared to the laboratory. Field data show, that amorphous Si and CdTe technologies have a much better low light behavior than the crystalline Si technologies. The tolerances of the nominal power PSTC have the biggest influence

  11. Frequently Asked Questions: The Higgs!

    CERN Multimedia

    CERN Bulletin

    2012-01-01

    Why have we tried so hard to find the Higgs particle? How does the Higgs mechanism work? What is the difference in physics between strong evidence and a discovery? Why do physicists speak in terms of "sigmas"? Find out here!   Why have we tried so hard to find the Higgs particle? Because it could be the answer to the question: how does Nature decide whether or not to assign mass to particles? All the fundamental particles making up matter – the electron, the quarks, etc. – have masses. Moreover, quantum physics requires that forces are also carried by particles. The W and Z particles that carry the weak force responsible for radioactivity must also have masses, whereas the photon, the carrier of the electromagnetic force, has no mass at all. This is the root of the “Higgs problem”: how to give masses to the fundamental particles and break the symmetry between the massive W and Z and the massless photon? Just assigning masses by hand...

  12. Culture as an Explanation of Technology Acceptance Differences: An Empirical Investigation of Chinese and US Users

    Directory of Open Access Journals (Sweden)

    Mark Srite

    2006-11-01

    Full Text Available This article examines the issue of the acceptance of technology across two cultures. To do this an extended technology acceptance model was tested in China and the US. Over one hundred participants, across both cultures, were surveyed as to their perceptions regarding technology acceptance. Cultural values were also measured for each group. Structural equation modeling was used to assess the research model. In general, the model explained a more than adequate amount of variance and achieved acceptable levels of significance. Differences across the two cultures were explained utilizing the cultural values of the participants. Implications for both research and practice were provided

  13. Exploring gender differences in perceptions of 3D telepresence collaboration technology

    DEFF Research Database (Denmark)

    Maurin, Hanna; Sonnenwald, Diane H.; Cairns, Bruce;

    2006-01-01

    technology now when only a proof-of-concept demonstration of the technology exists. We conducted a controlled lab study using a post-test design in which male and female paramedics diagnosed and treated a trauma victim (a computerized mannequin) in collaboration with a physician via 2D video or a 3D proxy....... The results show several gender differences that imply male paramedics may inherently receive more benefits from use of the 3D telepresence technology than female paramedics. Copyright 2006 ACM....

  14. The Containers Approach : An Inductive Method to look at Cultural Difference in a Technological Environment

    OpenAIRE

    Zimmermann, Basile

    2008-01-01

    The main goal of this presentation is to suggest an inductive way of looking at the idea of cultural difference in a technological environment. The proposal has three characteristics 1) it blurs the gap between natural sciences and human/social sciences, 2) it is extremely simple and down-to-earth, 3) the data that illustrates the method comes from recent field research in China (August 2008) in the realm of technology studies. The broader theoretical framework is provided by recent advances ...

  15. Evaluation of Two Different Teaching Concepts in Dentistry Using Computer Technology

    Science.gov (United States)

    Reich, Sven; Simon, James F.; Ruedinger, Dirk; Shortall, Adrian; Wichmann, Manfred; Frankenberger, Roland

    2007-01-01

    The common teaching goal of two different phantom head courses was to enable the students to provide an all-ceramic restoration by the means of computer technology. The aim of this study was to compare these two courses with regard to the different educational methods using identical computer software. Undergraduate dental students from a single…

  16. Frequent external focus feedback enhances motor learning

    Directory of Open Access Journals (Sweden)

    Gabriele eWulf

    2010-11-01

    Full Text Available The present study examined the hypothesis that feedback inducing an external focus of attention enhances motor learning if it is provided frequently (i.e., 100% rather than less frequently. Children (10-12 year olds practiced a soccer throw-in task and were provided feedback about movement form. The feedback statements, provided either after every (100% or every third (33% practice trial, were similar in content but induced either an internal focus (body-movement related or external focus (movement-effect related. The results demonstrated that learning of the movement form was enhanced by external-focus feedback after every trial (100% relative to external-focus feedback after every third trial (33% or internal-focus feedback (100%, 33%, as demonstrated by immediate and delayed transfer tests without feedback. There was no difference between the two internal-focus feedback groups. These findings indicate that the attentional focus induced by feedback is an important factor in determining the effectiveness of different feedback frequencies. We argue that the informational properties of feedback cannot sufficiently account for these and related findings, and suggest that the attentional role of feedback be given greater consideration in future studies.

  17. Frequent video game players resist perceptual interference.

    Directory of Open Access Journals (Sweden)

    Aaron V Berard

    Full Text Available Playing certain types of video games for a long time can improve a wide range of mental processes, from visual acuity to cognitive control. Frequent gamers have also displayed generalized improvements in perceptual learning. In the Texture Discrimination Task (TDT, a widely used perceptual learning paradigm, participants report the orientation of a target embedded in a field of lines and demonstrate robust over-night improvement. However, changing the orientation of the background lines midway through TDT training interferes with overnight improvements in overall performance on TDT. Interestingly, prior research has suggested that this effect will not occur if a one-hour break is allowed in between the changes. These results have suggested that after training is over, it may take some time for learning to become stabilized and resilient against interference. Here, we tested whether frequent gamers have faster stabilization of perceptual learning compared to non-gamers and examined the effect of daily video game playing on interference of training of TDT with one background orientation on perceptual learning of TDT with a different background orientation. As a result, we found that non-gamers showed overnight performance improvement only on one background orientation, replicating previous results with the interference in TDT. In contrast, frequent gamers demonstrated overnight improvements in performance with both background orientations, suggesting that they are better able to overcome interference in perceptual learning. This resistance to interference suggests that video game playing not only enhances the amplitude and speed of perceptual learning but also leads to faster and/or more robust stabilization of perceptual learning.

  18. Frequently Asked Questions about Bunion Surgery

    Science.gov (United States)

    ... A | Print | Share Frequently Asked Questions About Bunion Surgery Here are some frequently asked questions (FAQs) and ... best for you. 5. How can I avoid surgery? Sometimes observation of the bunion is all that ...

  19. Consideration of economic risks in a comparative analysis of nuclear technologies with different maturity levels

    Directory of Open Access Journals (Sweden)

    A.A. Andrianov

    2017-06-01

    Evaluation of risk indicators requires calculation of characteristics for probabilistic distributions of economic performance indicators and systemic use of statistical approaches based on Monte Carlo methods. Demonstration analysis results for the risk indicator evaluation have been discussed as applied to different economic performance indicators based on the example of a comparative analysis for two hypothetical light water reactor technologies to be considered in the selection of the most attractive option. Use of economic risk indicators for the comparative evaluation of reactor technologies appears to be helpful to decision makers not familiar with the technical characteristics and performance measures of reactor technologies but informed about the economic risk concepts. Such methodology may be employed efficiently to interpret the ranking results in a multi-criteria comparative evaluation of less and more mature reactor technologies.

  20. Science, Mathematics and Technology Teachers' Perception of School Environment: Gender Differences

    Science.gov (United States)

    Odogwu, Helen; Adeyemo, S. A.; Jimoh, J. A.; Yewonde, R. O.

    2011-01-01

    Purpose: This study seeks to examine gender differences amongst science, mathematics and technology (SMT) teachers with regards to nine school environment variables as well as the association of these variables with teachers' professional background and school characteristics. Design/methodology/approach: A questionnaire was used to collect data…

  1. Fibonacci Numbers Revisited: Technology-Motivated Inquiry into a Two-Parametric Difference Equation

    Science.gov (United States)

    Abramovich, Sergei; Leonov, Gennady A.

    2008-01-01

    This article demonstrates how within an educational context, supported by the notion of hidden mathematics curriculum and enhanced by the use of technology, new mathematical knowledge can be discovered. More specifically, proceeding from the well-known representation of Fibonacci numbers through a second-order difference equation, this article…

  2. Pushing the Limits: Making Dance Accessible to Different Bodies through Assistive Technology

    Science.gov (United States)

    Morris, Merry Lynn

    2015-01-01

    In this article, I draw critical attention to the assistive mobility devices that individuals who are differently bodied often use in dance and suggest that the dance genre presents the opportunity for reimagining the technological possibilities of these devices and creating more diverse repertoires. As an intervention and example, I describe the…

  3. The Impact of Information and Communication Technology on Education: The Missing Discourse between Three Different Paradigms

    Science.gov (United States)

    Aviram, Aharon; Talmi, Deborah

    2005-01-01

    Using a new methodological tool, the authors analyzed a large number of texts on information and communication technology (ICT) and education, and identified three clusters of views that guide educationists "in the field" and in more academic contexts. The clusters reflect different fundamental assumptions on ICT and education. The authors argue…

  4. Pushing the Limits: Making Dance Accessible to Different Bodies through Assistive Technology

    Science.gov (United States)

    Morris, Merry Lynn

    2015-01-01

    In this article, I draw critical attention to the assistive mobility devices that individuals who are differently bodied often use in dance and suggest that the dance genre presents the opportunity for reimagining the technological possibilities of these devices and creating more diverse repertoires. As an intervention and example, I describe the…

  5. Community-based management and interrelations between different technology adoption decisions

    DEFF Research Database (Denmark)

    Sodjinou, Epiphane; Henningsen, Arne

    the interrelations between the technologies. Estimates from multivariate probit models indicate significant interrelations between the five adoption decisions. We show how the estimation results, and particularly the different types of marginal effects, can be utilized to deeply analyze the interrelations between...

  6. Performance monitoring of different module technologies and design configurations of PV system in South Africa

    CSIR Research Space (South Africa)

    Roro, Kittessa T

    2016-06-01

    Full Text Available Performance monitoring of different module technologies and system configurations of Photovoltaic (PV) systems in South Africa is rare, resulting in-few reports based on field results of PV systems installed and operated in South Africa. The goal...

  7. EXPERIENCE GROWING A FRY WALLEYE (STIZOSTEDION LUCIOPERCA UNDER DIFFERENT PRODUCTION TECHNOLOGIES

    Directory of Open Access Journals (Sweden)

    V. Martsenuk

    2014-09-01

    Full Text Available Purpose. The question of growing and cultivation technology a fry walleye (Stizostedion Sander lucioperca, in various conditions of intensification and cultivation of the objects on the example of Ukraine, Poland and Czech Republic. Methodology. Some of the research conducted in JSC "Lebedynska RMS." There was a corresponding work of herd sires and fry. Also used published articles and monographs using statistical analysis methods. Findings. The existing technology of breeding and raising perch as in natural waters and artificial reproduction. Also, this is a clear description of the biology walleye in the early stages postembryogenesis perch. Also highlighted key points in the technology of the object at different aquaculture technologies. Originality. On the basis of existing technologies were analyzed current methods for growing and perch are to be brought in fish farms Ukraine, depending on the technical capabilities of enterprises. Practical value. Comparative review of technology growing perch allows farmers to introduce more appropriate technology of walleye for your own needs. Since it is directly a particular manufacturer planting material of the object is necessary to choose the most suitable and perfect technology, based on the existing herd sires, space, equipment and ability to use hormonal stimulation. So can use the following methods of breeding walleye: natural spawning, uncontrolled; controlled natural spawning; spawning in lake; artificial spawning; spawning outside-seasonal. During the early stages of walleye can identify a number of critical periods greatly affect the possibility of wound development: small body size at the final stage of resorption of yolk sac; small size of the cavity; feed intake in the water column; high sensitivity to stress; belonging to the group of fish with a closed bladder; great demands on environmental conditions; relative preferences heat; penchant for cannibalism.

  8. Zootechnical and economic performance indexes of milk production systems with different technological levels

    Directory of Open Access Journals (Sweden)

    Rodrigo de Andrade Ferrazza

    2015-02-01

    Full Text Available The objective of this study was to estimate reference zootechnical and economic performance indexes, examine the influence of different technological levels on technical and economic results on dairy farms and identify the components that had higher representativeness on total and effective operational cost. Thirty-eight size, zootechnical and economic indicators of 61 milk production systems, grouped according to three technological levels, were analyzed. The data were collected during January 2002 to December 2011 period. It was adopted the structure of the operating cost and the total cost as methodology for calculating the costs. The results were compared by ANOVA test (normal distribution, complemented by LSD test, and Kruskal-Wallis test (non-normal distribution, also complemented by LSD test. The stratification of milk production systems according to technological level does not seem to be a good criterion to be used when it wants to make comparisons between different groups of producers, evidenced by the lack of statistical significance (P>0.05 in comparing of size and zootechnical indexes between low and medium technological level groups. Producers of high technological level made investments without proper analysis of return on investment and risk. The items of total and effective operational cost that had higher representativeness were, in descending order, feeding and labor.

  9. Study of Different Technologies for Film Coating of Drug Layered Pellets Using Ethylcellulose as Functional Polymer

    OpenAIRE

    Melegari, Cecilia

    2016-01-01

    The research project focused on the study of different technologies for film coating of pellets using ethylcellulose as barrier-membrane coating polymer. In particular, two different approaches were investigated: the conventional aqueous film coating and the dry powder coating methods. The research carried out during the first part of the PhD provided a comprehensive study of the conventional aqueous film coating process of guaifenesin-loaded pellets in order to understand the variables af...

  10. Maximal Frequent Itemset Generation Using Segmentation Apporach

    Directory of Open Access Journals (Sweden)

    M.Rajalakshmi

    2011-09-01

    Full Text Available Finding frequent itemsets in a data source is a fundamental operation behind Association Rule Mining.Generally, many algorithms use either the bottom-up or top-down approaches for finding these frequentitemsets. When the length of frequent itemsets to be found is large, the traditional algorithms find all thefrequent itemsets from 1-length to n-length, which is a difficult process. This problem can be solved bymining only the Maximal Frequent Itemsets (MFS. Maximal Frequent Itemsets are frequent itemsets whichhave no proper frequent superset. Thus, the generation of only maximal frequent itemsets reduces thenumber of itemsets and also time needed for the generation of all frequent itemsets as each maximal itemsetof length m implies the presence of 2m-2 frequent itemsets. Furthermore, mining only maximal frequentitemset is sufficient in many data mining applications like minimal key discovery and theory extraction. Inthis paper, we suggest a novel method for finding the maximal frequent itemset from huge data sourcesusing the concept of segmentation of data source and prioritization of segments. Empirical evaluationshows that this method outperforms various other known methods.

  11. Differences and similarities of energy innovation systems – comparison of five technology areas in Denmark

    DEFF Research Database (Denmark)

    Borup, Mads

    2016-01-01

    This paper presents a study of the energy innovation systems concerning five technology areas in Denmark: biomass energy, wind power, solar cells, fuel cells & hydrogen and energy efficiency technology. The study shows that the characteristics of the innovation systems differ significantly between...... the areas amongst other things concerning actor landscapes, market formations, and patterns of learning and interaction. This is despite the common context of Danish society and Danish energy systems, policy and institutions. An increase in maturity has appeared in some of the areas over the latest decades....... Along with the increase in maturity, a number of new challenges have appeared. Despite internationalization and open economies, the national, domestic level is of significant importance. The paper contributes to current research discussions on the context relations of technological innovation systems...

  12. Diffusion of environmentally-friendly energy technologies: buy versus lease differences in residential PV markets

    Science.gov (United States)

    Rai, Varun; Sigrin, Benjamin

    2013-03-01

    Diffusion of microgeneration technologies, particularly rooftop photovoltaic (PV), represents a key option in reducing emissions in the residential sector. We use a uniquely rich dataset from the burgeoning residential PV market in Texas to study the nature of the consumer’s decision-making process in the adoption of these technologies. In particular, focusing on the financial metrics and the information decision-makers use to base their decisions upon, we study how the leasing and buying models affect individual choices and, thereby, the adoption of capital-intensive energy technologies. Overall, our findings suggest that the leasing model more effectively addresses consumers’ informational requirements and that, contrary to some other studies, buyers and lessees of PV do not necessarily differ significantly along socio-demographic variables. Instead, we find that the leasing model has opened up the residential PV market to a new, and potentially very large, consumer segment—those with a tight cash-flow situation.

  13. Frequently Asked Questions for Parents of Children with PH

    Science.gov (United States)

    ... Frequently Asked Questions for Parents of Children with PH What causes pulmonary hypertension in children? I’ve ... of what I read is about adults with PH. What are the primary differences between PH in ...

  14. Gender differences in information technology usage: a U.S.-Japan comparison

    OpenAIRE

    2004-01-01

    This study examines whether there are differences in men’s and women’s use of computers and the Internet in the United States and Japan and how any such gender gaps have changed over time. The authors focus on these two countries because information technology is widely used in both, but there are substantial differences in institutions and social organizations. They use microdata from several surveys during the 1997–2001 period to examine differences and trends in computer and Internet usage...

  15. Bridging Differences -- how Social Relationships and Racial Diversity Matter in a Girls' Technology Program

    Science.gov (United States)

    Kekelis, Linda S.; Ancheta, Rebecca Wepsic; Heber, Etta; Countryman, Jeri

    In this article, we explore an understudied dimension of girls' single-sex education - how social relationships and racial diversity impact the educational environment for girls, and how teachers may best address these concerns. Findings are presented from a 3-year qualitative study of girls' experiences in a single-sex technology program. Girls valued the all-girls aspect of the programs, and friendships formed the foundation of their social experiences. Girls' friendship groups influenced their experiences and eventually their success in the after school technology programs. When friendship groups were observed to be racially homogeneous, they created challenges for including and supporting a racially diverse student membership. Our responses to the challenges that cultural differences and tensions present are outlined, along with recommendations for helping girls bridge these differences.

  16. Mining Frequent Itemsets in Correlated Uncertain Databases

    Institute of Scientific and Technical Information of China (English)

    童咏昕; 陈雷; 佘洁莹

    2015-01-01

    Recently, with the growing popularity of Internet of Things (IoT) and pervasive computing, a large amount of uncertain data, e.g., RFID data, sensor data, real-time video data, has been collected. As one of the most fundamental issues of uncertain data mining, uncertain frequent pattern mining has attracted much attention in database and data mining communities. Although there have been some solutions for uncertain frequent pattern mining, most of them assume that the data is independent, which is not true in most real-world scenarios. Therefore, current methods that are based on the independent assumption may generate inaccurate results for correlated uncertain data. In this paper, we focus on the problem of mining frequent itemsets over correlated uncertain data, where correlation can exist in any pair of uncertain data objects (transactions). We propose a novel probabilistic model, called Correlated Frequent Probability model (CFP model) to represent the probability distribution of support in a given correlated uncertain dataset. Based on the distribution of support derived from the CFP model, we observe that some probabilistic frequent itemsets are only frequent in several transactions with high positive correlation. In particular, the itemsets, which are global probabilistic frequent, have more significance in eliminating the influence of the existing noise and correlation in data. In order to reduce redundant frequent itemsets, we further propose a new type of patterns, called global probabilistic frequent itemsets, to identify itemsets that are always frequent in each group of transactions if the whole correlated uncertain database is divided into disjoint groups based on their correlation. To speed up the mining process, we also design a dynamic programming solution, as well as two pruning and bounding techniques. Extensive experiments on both real and synthetic datasets verify the effectiveness and efficiency of the proposed model and algorithms.

  17. The influence of technological parameters on malt quality produced from different triticale varieties

    OpenAIRE

    Grujić Olgica S.; Pejin Jelena D.; Denčić Srboljub S.

    2009-01-01

    The analysis of eight different triticale varieties, from selective experiments, crop 2007, from Rimski Šančevi (Serbia) location was performed. On the basis of results obtained from triticale and produced triticale malt analysis as well as during micromalting, technological quality of investigated triticale varieties was evaluated. The aim of the work was to determine if the gibberellic acid added during the germination phase had a positive influence on the degradation of triticale grain dur...

  18. Solidification microstructure of M2 high speed steel by different casting technologies

    OpenAIRE

    Zhou Xuefeng; Fang Feng; Jiang Jianjing

    2011-01-01

    The present work investigated the solidification microstructure of AISI M2 high speed steel manufactured by different casting technologies, namely iron mould casting and continuous casting. The results revealed that the as-cast structure of the steel was composed of the iron matrix and the M2C eutectic carbide networks, which were greatly refined in the ingot made by continuous casting process, compared with that by the iron mould casting process. M2C eutectic carbides presented variation in ...

  19. Radiation damage of SiGe HBT Technologies at different bias configurations

    CERN Document Server

    Ullán, M; Lozano, M; Pellegrini, G; Knoll, D; Heinemann, B

    2008-01-01

    SiGe BiCMOS technologies are being proposed for the Front-end readout of the detectors in the middle region of the ATLAS-Upgrade. The radiation hardness of the SiGe bipolar transistors is being assessed for this application through irradiations with different particles. Biasing conditions during irradiation of bipolar transistors or circuits have an influence on the damage and there is a risk of erroneous results. We have performed several irradiation experiments of SiGe devices from IHP in different bias conditions. We have observed a systematic trend in gamma irradiations, showing a smaller damage in transistors irradiated biased compared to shorted or floating terminals.

  20. Technological quality of common bean grains obtained in different growing seasons

    Directory of Open Access Journals (Sweden)

    Eliana Francischinelli Perina

    2014-03-01

    Full Text Available The traits that provide technological quality to common bean grains exhibit genetic and environmental variation and variation in the genotype x environment interaction. In this context, the aim of this study was to assess the effect of different periods of the growing season on the technological quality of common bean grains. The experiment was conducted with 25 bean genotypes (carioca [beige with brown stripes] and black commercial group that are part of the Value for Cultivation and Use (Valor de Cultivo e Uso - VCU trials in three growing seasons, namely, the 2009/2010 rainy season, the 2010/2011 dry season and the 2010/2011 winter season, in a randomized block experimental design with three replications in which the following items were assessed: cooking time (CT, water absorption capacity before cooking (Peanc and after cooking (Peapc, percentage of whole grains (PWG, total soluble solids in the broth (TSSb, volume expansion before cooking (EXPVbc and after cooking (EXPVac, and dry grain density (DD, grain density after maceration (SD and grain density after cooking (CD. Assessments showed that the different growing seasons for obtaining grains for the purpose of analysis of technological quality have an effect on the results and on differentiation among genotypes, indicating genotype x environment interaction. They also showed that the genotypes C2-1-6-1, C4-8-1-1, LP04-03, IAC-Imperador, P5-4-4-1 and Pr11-6-4-1-2 had the best results in relation to cooking time in the mean values of the three growing seasons. The use of early selection based on phenotypic correlations that exist among the technological features is not expressive, due to the variation of magnitude among the different growing seasons.

  1. Discovering Frequent Subtrees from XML Data Using Neural Networks

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    By rapid progress of network and storage technologies, a huge amount of electronic data such as Web pages and XML has been available on Internet. In this paper, we study a data-mining problem of discovering frequent ordered sub-trees in a large collection of XML data, where both of the patterns and the data are modeled by labeled ordered trees. We present an efficient algorithm of Ordered Subtree Miner(OSTMiner) based on two- layer neural networks with Hebb rule, that computes all ordered sub-trees appearing in a collection of XML trees with frequent above a user-specified threshold using a special structure EM-tree. In this algorithm, EM-tree is used as an extended merging tree to supply scheme information for efficient pruning and mining frequent sub-trees. Experiments results showed that OSTMiner has good response time and scales well.

  2. Evaluation of Public E-Services and Information Technology Accessibility in Different Social Groups

    Directory of Open Access Journals (Sweden)

    Ramutė Naujikienė

    2012-12-01

    Full Text Available The purpose of this study is to develop an approach based on the social quality evaluation square model for evaluation of information technology usage in different social groups. Componential view to the accessibility of e-services including IT means providing the possibility to research the influences of different life conditions to usage of the public e-services. The task of this empirical study is directed towards revealing the differences of e-inclusion and e-services accessibility for social groups of citizens of Lithuania, and to compare this accessibility data with other EU countries.Design/methodology/approach—the approach is based on the square model of social quality evaluation of information technology usage in different social groups. The social division square model includes an assessment of quality according to the evaluation of socioeconomic security, social inclusion, social cohesion, and empowerment. Empowerment can be defined as consisting of individual or collective decisions to act on one’s own life.Findings—the results are demonstrated by the accessibility of public e-services data, which are evaluated by the quality of social group development according to IT applications. The hypothesis was confirmed that the e-government activities can be realized by properly selecting and installing technologies, and using technology facilities. E-services influence the capabilities of state officials to apply modern technology and increase the availability of e-services for social groups. Results consist of individual or collective decisions to act on one’s own life, to implementation of effective information technologies in the e-government activities and using of e-services. An important indicator is the implementation of e-services in the activity of citizens. It is submitted as the index of e-participation in dealing with the activities of citizens and the possibilities of authorities directly related with providing services

  3. Frequently Asked Questions on Potassium Iodide (KI)

    Science.gov (United States)

    ... Bioterrorism and Drug Preparedness Frequently Asked Questions on Potassium Iodide (KI) Share Tweet Linkedin Pin it More sharing ... Drug Administration (FDA) issued a final Guidance on Potassium Iodide as a Thyroid Blocking Agent in Radiation Emergencies) ( ...

  4. Frequent Pattern Mining Algorithms for Data Clustering

    DEFF Research Database (Denmark)

    Zimek, Arthur; Assent, Ira; Vreeken, Jilles

    2014-01-01

    that frequent pattern mining was at the cradle of subspace clustering—yet, it quickly developed into an independent research field. In this chapter, we discuss how frequent pattern mining algorithms have been extended and generalized towards the discovery of local clusters in high-dimensional data......Discovering clusters in subspaces, or subspace clustering and related clustering paradigms, is a research field where we find many frequent pattern mining related influences. In fact, as the first algorithms for subspace clustering were based on frequent pattern mining algorithms, it is fair to say....... In particular, we discuss several example algorithms for subspace clustering or projected clustering as well as point out recent research questions and open topics in this area relevant to researchers in either clustering or pattern mining...

  5. Frequently Asked Questions about Digital Mammography

    Science.gov (United States)

    ... Consumer Information (MQSA) Frequently Asked Questions About Digital Mammography Share Tweet Linkedin Pin it More sharing options ... mammography exams, such as DBT? What is digital mammography? Full field digital mammography (FFDM, also known simply ...

  6. Frequently Asked Questions about Genetic Testing

    Science.gov (United States)

    ... Care Specific Genetic Disorders Frequently Asked Questions About Genetic Testing What is genetic testing? What can I learn ... find more information about genetic testing? What is genetic testing? Genetic testing uses laboratory methods to look at ...

  7. Frequently Asked Questions about Genetic Counseling

    Science.gov (United States)

    ... on this page Frequently Asked Questions About Genetic Counseling What are genetic professionals and what do they ... genetics nurses. Top of page What is genetic counseling and evaluation? Genetic professionals work as members of ...

  8. Paying for Joint or Single Audits? The Importance of Auditor Pairings and Differences in Technology Efficiency

    DEFF Research Database (Denmark)

    Holm, Claus; Thinggaard, Frank

    2016-01-01

    In the first theoretical paper on joint audits, Deng et al. predict that the audit fees for joint audits will be lower than those from single audits. However, the prediction depends on the combination of audit firms involved in the joint audit and on their technology efficiency as well...... as on the liability involved. This paper is the first to empirically test the predictions. Our findings from Denmark do not indicate any general difference in audit fees when two audit firms – regardless of combination and technology efficiency – conduct the statutory audit compared to a single Big audit firm....... The results indicate the existence of fixed coordination costs in joint audits. We do, however, find higher audit fees in Big-Small joint audits when the Small audit firm has a share of less than 25 per cent. This may reflect free-riding concerns....

  9. Analysis on complex structure stability under different bar angle with BIM technology

    Directory of Open Access Journals (Sweden)

    Wang Xiongjue

    2016-03-01

    Full Text Available Sun Valley, the landmark building of World Expo in Shanghai, which has free surface with single-layer reticulated shell structure, is a typical complex structure. CAD/CAM integrated information system to design is used for the complex structure; however, it is a very rigorous process to be used widely. The relevant technology of the Sun Valley is not open to the public at present, so we try to use BIM technology to model the Sun Valley, including architecture modelling and structure analysis. By analysis of the Sun Valley structure using this method, it is proved that the problems in modelling may be solved by writing some script codes in Rhino software and the stability of the model can also be analyzed. The new approach is viable and effective in combination with different softwares such as Rhino, Revit, and Midas in solution of the complex shaped surfaces’ structure for modelling and calculation.

  10. Changes in the fertility of a leached chernozem under different primary tillage technologies

    Science.gov (United States)

    Korolev, V. A.; Gromovik, A. I.; Borontov, O. K.

    2016-01-01

    Changes in the fertility of a leached chernozem under different tillage technologies (moldboard, non-inversive, and combined tillage) were studied in a multifactor stationary field experiment established in 1985 in Voronezh oblast on a low-humus medium-deep light clayey leached chernozem. The nine-field rotation of cereals and sugar beet was practiced. It was found that the major parameters of soil fertility—the content and qualitative composition of humus and the physicochemical and physical properties of the chernozem—remained relatively stable independently from the applied primary tillage technologies. However, taking into account economic characteristics (crop yields, production costs, energy expenses, etc.), the combined tillage system proved to be most efficient. It can be recommended for cereals-sugar beet rotation systems in the central chernozemic region, as it ensures the highest efficiency of crop growing and preserves the fertility of leached chernozems.

  11. Exploring the Factors That Affect the Intention to Use Collaborative Technologies: The Differing Perspectives of Sequential/Global Learners

    Science.gov (United States)

    Huang, Yong-Ming

    2015-01-01

    The use of collaborative technologies in learning has received considerable attention in recent years, but few studies to date have examined the factors that affect sequential and global learners' intention to use such technologies. Previous studies have shown that the learners of different learning styles have different needs for educational…

  12. Structural properties of porous materials and powders used in different fields of science and technology

    CERN Document Server

    Volfkovich, Yury Mironovich; Bagotsky, Vladimir Sergeevich

    2014-01-01

    This book provides a comprehensive and concise description of most important aspects of experimental and theoretical investigations of porous materials and powders, with the use and application of these materials in different fields of science, technology, national economy and environment. It allows the reader to understand the basic regularities of heat and mass transfer and adsorption occurring in qualitatively different porous materials and products, and allows the reader to optimize the functional properties of porous and powdered products and materials. Written in an straightforward and transparent manner, this book is accessible to both experts and those without specialist knowledge, and it is further elucidated by drawings, schemes and photographs. Porous materials and powders with different pore sizes are used in many areas of industry, geology, agriculture and science. These areas include (i) a variety of devices and supplies; (ii) thermal insulation and building materials; (iii) oil-bearing geologic...

  13. Economic Efficiency of Selected Crops Cultivated under Different Technology of Soil Tillage

    Directory of Open Access Journals (Sweden)

    Vach M.

    2016-03-01

    Full Text Available The objective of this study was the model comparison and economic evaluation of different methods of soil tillage and crop stand establishments used. Based on yield results (winter wheat, spring barley, and white mustard cultivated in three-crop rotation from field experiments with conventional, conservation with minimum tillage, and no-tillage methods conducted at the site Prague-Ruzyně, model economic balances were evaluated. Prices of the main products were determined based on the yield results from the period 2010-2013 and the current market prices. In the individual tillage systems, the total costs of production of evaluated crops were counted up and profitability was calculated as a ratio of profit to total costs. The highest total costs of crop cultivation were identified in cereals under conventional soil tillage, on the contrary, the lowest in cereals cultivated under conservation tillage technology. As for the growing technologies, the highest profitability was found in winter wheat, as for the tillage methods, it was in the conservation variant with minimum tillage. The economic evaluation for individual crops was based on standards of growing technologies and particular work operations.

  14. Pedagogy and/or technology: Making difference in improving students' problem solving skills

    Science.gov (United States)

    Hrepic, Zdeslav; Lodder, Katherine; Shaw, Kimberly A.

    2013-01-01

    Pen input computers combined with interactive software may have substantial potential for promoting active instructional methodologies and for facilitating students' problem solving ability. An excellent example is a study in which introductory physics students improved retention, conceptual understanding and problem solving abilities when one of three weekly lectures was replaced with group problem solving sessions facilitated with Tablet PCs and DyKnow software [1,2]. The research goal of the present study was to isolate the effect of the methodology itself (using additional time to teach problem solving) from that of the involved technology. In Fall 2011 we compared the performance of students taking the same introductory physics lecture course while enrolled in two separate problem-solving sections. One section used pen-based computing to facilitate group problem solving while the other section used low-tech methods for one third of the semester (covering Kinematics), and then traded technologies for the middle third of the term (covering Dynamics). Analysis of quiz, exam and standardized pre-post test results indicated no significant difference in scores of the two groups. Combining this result with those of previous studies implies primacy of pedagogy (collaborative problem solving itself) over technology for student learning in problem solving recitations.

  15. Perceived Quality of Social Relations and Frequent Drunkenness

    DEFF Research Database (Denmark)

    Kjærulff, Thora M; Rivera, Francisco; Jiménez-Iglesias, Antonia

    2014-01-01

    AIM: The aim of the study was to examine, for female and male students separately, whether perceived quality of relationships with peers and parents and relations in school predict self-reported frequent drunkenness among Spanish adolescents. METHODS: The Spanish data from the Health Behaviour...... in School-aged Children Study (HBSC) 2010 survey were used including 1177 female and 1126 male students aged between 15 and 16 years. RESULTS: For both genders, students reporting low school satisfaction had increased odds of frequent drunkenness. Among females, low and medium levels of classmate support...... odds of frequent drunkenness compared with those with high level of satisfaction with friendships. CONCLUSION: We found different associations between perceived quality of social relations and frequent drunkenness among male and female students. Results showed that social relations seemed to better...

  16. A Comparative Study of Hooks in the Ya Rns Produced by Different Spinning Technologies

    Directory of Open Access Journals (Sweden)

    Ghosh Anindya

    2015-12-01

    Full Text Available This article presents a comparative study of hooks’ characteristics of ring, rotor, air-jet and open-end friction spun yarns. Hook types and their extent, spinning in-coefficient and mean fibre extent in the yarns produced on different spinning technologies are investigated. The results show that the hook extents for open-end friction spun yarn are the highest followed by rotor, ring and air-jet spun yarns. Ring and air-jet spun yarns have higher percentage and extent of trailing hook as compared with leading hook, whereas, rotor and friction spun yarns show the reverse trend.

  17. Parallel Frequent Pattern Discovery: Challenges and Methodology

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Parallel frequent pattern discovery algorithms exploit parallel and distributed computing resources to relieve the sequential bottlenecks of current frequent pattern mining (FPM) algorithms. Thus, parallel FPM algorithms achieve better scalability and performance, so they are attracting much attention in the data mining research community. This paper presents a comprehensive survey of the state-of-the-art parallel and distributed frequent pattern mining algorithms with more emphasis on pattern discovery from complex data (e.g., sequences and graphs) on various platforms. A review of typical parallel FPM algorithms uncovers the major challenges, methodologies, and research problems in the field of parallel frequent pattern discovery,such as work-load balancing, finding good data layouts, and data decomposition. This survey also indicates a dramatic shift of the research interest in the field from the simple parallel frequent itemset mining on traditional parallel and distributed platforms to parallel pattern mining of more complex data on emerging architectures, such as multi-core systems and the increasingly mature grid infrastructure.

  18. Text Classification Using Sentential Frequent Itemsets

    Institute of Scientific and Technical Information of China (English)

    Shi-Zhu Liu; He-Ping Hu

    2007-01-01

    Text classification techniques mostly rely on single term analysis of the document data set, while more concepts,especially the specific ones, are usually conveyed by set of terms. To achieve more accurate text classifier, more informative feature including frequent co-occurring words in the same sentence and their weights are particularly important in such scenarios. In this paper, we propose a novel approach using sentential frequent itemset, a concept comes from association rule mining, for text classification, which views a sentence rather than a document as a transaction, and uses a variable precision rough set based method to evaluate each sentential frequent itemset's contribution to the classification. Experiments over the Reuters and newsgroup corpus are carried out, which validate the practicability of the proposed system.

  19. Digital Disconnect or Digital Difference? A Socio-Ecological Perspective on Young Children's Technology Use in the Home and the Early Childhood Centre

    Science.gov (United States)

    Edwards, Susan; Henderson, Michael; Gronn, Donna; Scott, Anne; Mirkhil, Moska

    2017-01-01

    A digital disconnect perspective is founded on an assumption that technology use in the home is frequent, creative and generative, and that technology use in the early childhood centre should be the same as that found in the home. However, such arguments divert our attention from understanding the nature of the setting and thereby from an…

  20. Frequently cited journals in forensic psychology.

    Science.gov (United States)

    Black, Steve

    2012-02-01

    Works cited in six forensic psychology journals published 2008-2010 were counted to identify the most frequently cited journals. The sample of works cited (N = 21,776) was not a definitive ranked list of important journals in forensic psychology, but was large enough to indicate high-impact journals. The list of frequently cited publications included more general psychiatry and psychology journals than titles specific to forensic psychology. The implications of the proportion of general versus specific titles for collections supporting research in forensic psychology were discussed.

  1. Frequent price changes under menu costs

    DEFF Research Database (Denmark)

    Hansen, Per Svejstrup

    1999-01-01

    This paper investigates the effect of uncertainty on a single firm's pricing behaviour in a dynamic menu cost model that results in (S,s)-rules where the price is fixed inside a band. It will be demonstrated that even though the band of inaction widens in response to increased uncertainty......, the price may be changed more frequent in the short run, and in the long run it definitely will. Hence, observing frequent price changes is not necessarily inconsistent with a firm operating under menu costs. This paper relies on an article by Dixit (1991), (Review of Economic studies, 58, 141...

  2. Technology diffusion of a different nature: Applications of nuclear safeguards technology to the chemical weapons verification regime

    Energy Technology Data Exchange (ETDEWEB)

    Kadner, S.P. [Aquila Technologies Group, Inc., Albuquerque, NM (United States); Reisman, A. [Brookhaven National Lab., Upton, NY (United States); Turpen, E. [Aquila Technologies Group, Inc., Cambridge, MA (United States)

    1996-10-01

    The following discussion focuses on the issue of arms control implementation from the standpoint of technology and technical assistance. Not only are the procedures and techniques for safeguarding nuclear materials undergoing substantial changes, but the implementation of the Chemical Weapons Convention (CWC) and the Biological Weapons Convention (BWC) will give rise to technical difficulties unprecedented in the implementation of arms control verification. Although these regimes present new challenges, an analysis of the similarities between the nuclear and chemical weapons non-proliferation verification regimes illustrates the overlap in technological solutions. Just as cost-effective and efficient technologies can solve the problems faced by the nuclear safeguards community, these same technologies offer solutions for the CWC safeguards regime. With this in mind, experts at the Organization for the Prohibition of Chemical Weapons (OPCW), who are responsible for verification implementation, need to devise a CWC verification protocol that considers the technology already available. The functional similarity of IAEA and the OPCW, in conjunction with the technical necessities of both verification regimes, should receive attention with respect to the establishment of a technical assistance program. Lastly, the advanced status of the nuclear and chemical regime vis-a-vis the biological non-proliferation regime can inform our approach to implementation of confidence building measures for biological weapons.

  3. Valuing hospital investment in information technology: does governance make a difference?

    Science.gov (United States)

    Parente, Stephen T; Van Horn, R Lawrence

    2006-01-01

    This article examines the investment of patient care information technology (IT) systems by a nationwide sample of U.S. short-term acute care hospitals and the resulting impact these systems have in the productivity of institutions from 1990-1998. Of particular interest is the extent to which for-profit and not-for-profit hospitals obtain different results from the adoption of lT systems. We find that the marginal effect of IT on for-profit hospital productivity is to reduce the number of days supplied, while in not-for-profit hospitals the marginal effect of IT is to increase the quantity of services supplied. This resulting effect is consistent with the differing objectives of not-for-profit and for-profit hospitals and demonstrates the positive marginal value of IT as a sustainable and prudent investment.

  4. Determination of Glucose Levels during Dialysis Treatment: Different Sensors and Technologies

    Directory of Open Access Journals (Sweden)

    Stefano Sbrignadello

    2016-01-01

    Full Text Available The measurement of glycemia in subjects with renal failure, thus treated with hemodialysis, or peritoneal dialysis, is clinically relevant, since glucose levels may influence the determination of other solutes, such as creatinine, as well as some ions, such as sodium, whose degree of removal during dialysis sessions should be controlled carefully. Also, glucose levels should be controlled to avoid possible events of hypoglycemia during the treatment, especially in diabetic subjects. Indeed, even cases of hypoglycemic coma are documented. The glucose measurement during the dialysis treatment can be performed with different sensors and technologies: for instance, with traditional glucose meters, with instruments for continuous glucose monitoring, or with optical sensors. The aim of this review study was to analyze these different approaches and briefly discuss possible advantages and limitations.

  5. On finding frequent patterns in event sequences

    DEFF Research Database (Denmark)

    Campagna, Andrea; Pagh, Rasmus

    2010-01-01

    on the size of the graph, and on the frequency $\\varepsilon$ of the most frequent traces. In addition, we apply techniques from streaming algorithms to achieve space usage that depends only on $\\varepsilon$, and not on the number of distinct traces. The abstract problem considered models a variety of tasks...

  6. Auditory Training with Frequent Communication Partners

    Science.gov (United States)

    Tye-Murray, Nancy; Spehar, Brent; Sommers, Mitchell; Barcroft, Joe

    2016-01-01

    Purpose: Individuals with hearing loss engage in auditory training to improve their speech recognition. They typically practice listening to utterances spoken by unfamiliar talkers but never to utterances spoken by their most frequent communication partner (FCP)--speech they most likely desire to recognize--under the assumption that familiarity…

  7. Treatment of Anthrax Disease Frequently Asked Questions

    Energy Technology Data Exchange (ETDEWEB)

    Judd, Kathleen S.; Young, Joan E.; Lesperance, Ann M.; Malone, John D.

    2010-05-14

    This document provides a summary of Frequently Asked Questions (FAQs) on the treatment of anthrax disease caused by a wide-area release of Bacillus anthracis spores as an act bioterrorism. These FAQs are intended to provide the public health and medical community, as well as others, with guidance and communications to support the response and long-term recovery from an anthrax event.

  8. Research Discovers Frequent Mutations of Chromatin

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    With the support of National Natural Science Foundation of China, BGI, the largest genomics organization in the world, and Peking University Shenzhen Hospital, published online in Nature Geneticsics that the study on frequent mutations of chromatin remodeling genes in transitional cell carcinoma (TCC) of thebladder on August 8th, 2011. Their study provides a valuable genetic basis for future studies on TCC,

  9. Chronic frequent headache in the general population

    NARCIS (Netherlands)

    Wiendels, Natalie Janette

    2008-01-01

    This thesis describes the results of a large questionnaire-based study on the epidemiology of chronic frequent headache (CFH) in the Dutch adult population. It also includes information on triptan (over)use from the Drug Information Project (GIP database) and the results of a withdrawal trial in

  10. Chronic frequent headache in the general population

    NARCIS (Netherlands)

    Wiendels, Natalie Janette

    2008-01-01

    This thesis describes the results of a large questionnaire-based study on the epidemiology of chronic frequent headache (CFH) in the Dutch adult population. It also includes information on triptan (over)use from the Drug Information Project (GIP database) and the results of a withdrawal trial in Gen

  11. Design Improvements for Frequently Misrecognized Letters

    DEFF Research Database (Denmark)

    Beier, Sofie; Larson, Kevin

    2010-01-01

    To enhance typeface legibility we studied how to improve the design of individual letters. Three diff erent fonts were created, each containing several variations of the most frequently misrecognized letters. These variations were tested both with distance and short exposure methodologies. Creati...

  12. Excess Frequent Insufficient Sleep in American Indians/Alaska Natives

    Directory of Open Access Journals (Sweden)

    Daniel P. Chapman

    2013-01-01

    Full Text Available Objective. Frequent insufficient sleep, defined as ≥14 days/past 30 days in which an adult did not get enough rest or sleep, is associated with adverse mental and physical health outcomes. Little is known about the prevalence of frequent insufficient sleep among American Indians/Alaska Natives (AI/AN. Methods. We assessed racial/ethnic differences in the prevalence of frequent insufficient sleep from the combined 2009-2010 Behavioral Risk Factor Surveillance Survey among 810,168 respondents who self-identified as non-Hispanic white (NHW, , non-Hispanic black (NHB, , Hispanic (, or AI/AN (. Results. We found significantly higher unadjusted prevalences (95% CI of frequent insufficient sleep among AI/AN (34.2% [32.1–36.4] compared to NHW (27.4% [27.1–27.6]. However, the age-adjusted excess prevalence of frequent insufficient sleep in AI/AN compared to NHW was decreased but remained significant with the addition of sex, education, and employment status; this latter relationship was further attenuated by the separate additions of obesity and lifestyle indicators, but was no longer significant with the addition of frequent mental distress to the model (PR  =  1.05; 95% CI : 0.99–1.13. This is the first report of a high prevalence of frequent insufficient sleep among AI/AN. These results further suggest that investigation of sleep health interventions addressing frequent mental distress may benefit AI/AN populations.

  13. Plant diseases in landrace varieties and hybrid maize cultivated using different technology levels

    Directory of Open Access Journals (Sweden)

    Alisson Vinicius de Araujo

    2013-12-01

    Full Text Available Local soil and climate conditions as well as management techniques used in maize cropping affect disease development. In the present study, the incidence and severity of diseases were evaluated in four maize genotypes cultured in three management systems with different technology levels. We tested two landrace varieties from the North of Minas Gerais state, one double-cross hybrid and 1 singlecross hybrid. The experiment was carried out using a randomized block in lays (four varieties and three management systems and three repetitions. Disease incidence was determined by calculating the percentage of plants with symptoms, and its severity was assessed using a scale diagram to categorize symptom levels from 0 to 5. Results were analyzed using analysis of variance followed by mean contrasts using the Scott-Knott test at a significance level of 0.05. In conclusion, cropping system affects the incidence and severity of southern rust, which is increased by high technology systems. Landrace varieties Argentino and BR da Várzea and double-cross hybrid SHS 4080 have higher resistance to southern rust than single-cross hybrid IAC 8333.

  14. Comparison of analytical parameters of beer brewed in two different technological ways at two pub breweries

    Directory of Open Access Journals (Sweden)

    Pavel Kryl

    2012-01-01

    Full Text Available This publication deals with brewing beer by infusion and decoction technologies of mash production in microbreweries. Samples of two microbrewery beers are compared, namely Richard beer (Brno-Žebětín produced in a double mash manner appropriate for the Czech brewing type, and beer samples taken at the laboratory microbrewery of Mendel University in Brno (MENDELU, where beer is produced in a simpler and less energy – demanding infusion method. At all the beer samples the basic analytical parameters of real extract, ethanol content, degree of fermentation and the extract of original hopped wort were measured using an automatic beer analyzer. The results coming out of the automatic beer analyzer are compared with the results of the beer samples analysis performed by liquid chromatography, by which the contents of oligosaccharides, maltose, glycerol and ethanol were measured. Both methods provide a number of analytical results for the comparison of decoction and infusion techniques, and analytical characteristics of both the brewing procedures. Emphasis is placed on statistical data processing and comparison of different types of beer and particular brews between each other, both in terms of production technology as well as beer sampling throughout the year.

  15. The Case of Capogrossi in Rome: Collecting Data with Different Technologies on a Contemporary Mural Painting

    Science.gov (United States)

    Mezzadri, P.; Russo, J.

    2017-05-01

    This paper focuses on the presentation of a part of the main thematic data documenting the pathologies and the degradation problems of a contemporary mural painting, which was designed and carried out by the italian artist Giuseppe Capogrossi in 1954. This forgotten masterpiece is developed on the ceilings of the main double stairscase at the entrance of the Airone, an ex-cinema-theatre in Rome (Italy). In time, the original project was completely damaged and now the Airone cinema is abandoned since 1999; the decoration, strictly connected to the function of the original project, has been completely covered by synthetic coatings. The documentation of the observed pathologies and the original materials of the lower ceiling takes place during a restoration project in 2015-2016 and was accomplished by utilizing different technologies in order to facilitate the collecting of the main data within several graphic thematic tables. The challenge of this documentation was to create a contact point, and perhaps also a contamination, between the practices of CAD graphic documentation, restoration and GIS technology.

  16. Experimental study on supporting technology of gob-side entry with different roof conditions

    Institute of Scientific and Technical Information of China (English)

    LUO Yong

    2012-01-01

    Aiming to effectively solve the problem of deep mining with safety and high efficiency,according to geological conditions,production and stress analysis in roadway surrounding rock,experimental studies on roadway supporting of workface 103 under three types of roof conditions with different supporting technologies and parameters were carried out based on the theory of supporting technology of gob-side entry.The results show the supporting of gob-side entry retaining is successful,and the deep surrounding rock is effectively controlled by field monitoring and drilling-hole photos.After stress in surrounding rock of roadways restores stable,the final roadway deformation of surrounding rock of haulage roadway and air-roadway are both about 300 mm; width of gob-side entry is 3.8-4.0 m and average height is 2.0-2.2 m; roadway section is above 8.0 m2,which solves the problems of gob-side entry retaining support strength and safe mining; necessary conditions of mining safety in workface 103 are met.

  17. Current Fluctuation Measurements of Amperometric Gas Sensors Constructed with Three Different Technology Procedures

    Directory of Open Access Journals (Sweden)

    Sedlak Petr

    2016-12-01

    Full Text Available Electrochemical amperometric gas sensors represent a well-established and versatile type of devices with unique features: good sensitivity and stability, short response/recovery times, and low power consumption. These sensors operate at room temperature, and therefore have been applied in monitoring air pollutants and detection of toxic and hazardous gases in a number of areas. Some drawbacks of classical electrochemical sensors are overcome by the solid polymer electrolyte (SPE based on ionic liquids. This work presents evaluation of an SPE-based amperometric sensor from the point of view of current fluctuations. The sensor is based on a novel three-electrode sensor platform with solid polymer electrolytes containing ionic liquid for detection of nitrogen dioxide − a highly toxic gas that is harmful to the environment and presenting a possible threat to human health even at low concentrations. The paper focuses on using noise measurement (electric current fluctuation measurement for evaluation of electrochemical sensors which were constructed by different fabrication processes: (i lift-off and drop-casting technology, (ii screen printing technology on a ceramic substrate and (iii screen printing on a flexible substrate.

  18. Design and Modelling of Different SRAM'S Based on CNTFET 32NM Technology

    Directory of Open Access Journals (Sweden)

    Naagesh. S. Bhat

    2012-02-01

    Full Text Available Carbon nano tube field-effect transistor (CNTFET refers to a field-effect transistor that utilizes a single carbon nano tube or an array of carbon nano tubes as the channel material instead of bulk silicon in the traditional MOSFET structure. Since it was first demonstrated in 1998, there have been tremendous developments in CNTFETs, which promise for an alternative material to replace silicon in future electronics. Carbon nano tubes are promising materials for the nano-scale electron devices such as nano tube FETs for ultra-high density integrated circuits and quantum-effect devices for novel intelligent circuits, which are expected to bring a breakthrough in the present silicon technology. A Static Random Access Memory (SRAM is designed to plug two needs: i The SRAM provides as cache memory, communicating between central processing unit and Dynamic Random Access Memory (DRAM. ii The SRAM technology act as driving force for low power application since SRAM is portable compared to DRAM, and SRAM doesn’t require any refresh current. On the basis of acquired knowledge, we present different SRAM's designed for the conventional CNTFET. HSPICE simulations of this circuit using Stanford CNTFET model shows a great improvement in power saving.

  19. Design and Modelling of Different SRAM'S Based on CNTFET 32NM Technology

    Directory of Open Access Journals (Sweden)

    Naagesh. S. Bhat

    2012-03-01

    Full Text Available Carbon nanotube field-effect transistor (CNTFET refers to a field-effect transistor that utilizes a single carbon nanotube or an array of carbon nanotubes as the channel material instead of bulk silicon in thetraditional MOSFET structure. Since it was first demonstrated in 1998, there have been tremendous developments in CNTFETs, which promise for an alternative material to replace silicon in future electronics. Carbon nanotubes are promising materials for the nano-scale electron devices such as nanotube FETs for ultra-high density integrated circuits and quantum-effect devices for novel intelligent circuits, which are expected to bring a breakthrough in the present silicon technology. A Static Random Access Memory (SRAM is designed to plug two needs: i The SRAM provides as cache memory, communicating between central processing unit and Dynamic Random Access Memory (DRAM. ii The SRAM technology act as driving force for low power application since SRAM is portable comparedto DRAM, and SRAM doesn’t require any refresh current. On the basis of acquired knowledge, we present different SRAM's designed for the conventional CNTFET. HSPICE simulations of this circuit using Stanford CNTFET model shows a great improvement in power saving.

  20. Frequent Rain Observation From Geostationary Satellite

    Science.gov (United States)

    Bizzarri, B.; Gomas Science Team

    The target 3-h observing cycle of GPM will meet requirements from Global NWP and, to a large extent, Regional NWP; and be supportive of VIS/IR-derived rain estimates from geostationary satellites for the purpose of Nowcasting. MW rain observation from geostationary orbit at, say, 15 min intervals, would fully meet Regional NWP requirements and have greatest impact on Nowcasting: but this implies either unprac- tically large antennas or unacceptably coarse resolution. Concepts to overcome this problem have been developed in the US within the study called GEM (Geostationary Microwave Observatory), and now there is in Europe a proposal for a demonstration satellite submitted to ESA as GOMAS (Geostationary Observatory for Microwave Atmospheric Sounding). To overcome the problem of resolution, use of Sub-mm fre- quencies is envisaged: e.g., at 425 GHz, a 10-km resolution at nadir would require a 3-m antenna. The observing principle is based on the use of absorption bands of oxygen (54, 118 and 425 GHz) and of water vapour (183 and 380 GHz). Narrow- bandwidths channels are implemented (for a total of about 40 in the five bands) so as to observe the full profile of temperature and water vapour. Profiles from different bands are differently affected by liquid and ice water of different drop size, and fi- nally by precipitation. Simultaneous retrieval of temperature/humidity profiles, cloud liquid/ice water (total-columns and gross profile) and precipitation rate is in principle possible, and partially demonstrated by several airborne MW/Sub-mm instruments. To transfer this demonstrations in the geostationary orbit, the problem of radiometric sensitivity (additional to that one of the antenna size) has to be solved. With current technology, it is feasible to get sufficient accuracy if scan is limited to about 1/12 of the Earth disk, which is sufficient to abundantly cover Europe, the Mediterranean and Eastern Atlantic. The imaged area can be moved everywhere within the disk

  1. Discovering More Accurate Frequent Web Usage Patterns

    CERN Document Server

    Bayir, Murat Ali; Cosar, Ahmet; Fidan, Guven

    2008-01-01

    Web usage mining is a type of web mining, which exploits data mining techniques to discover valuable information from navigation behavior of World Wide Web users. As in classical data mining, data preparation and pattern discovery are the main issues in web usage mining. The first phase of web usage mining is the data processing phase, which includes the session reconstruction operation from server logs. Session reconstruction success directly affects the quality of the frequent patterns discovered in the next phase. In reactive web usage mining techniques, the source data is web server logs and the topology of the web pages served by the web server domain. Other kinds of information collected during the interactive browsing of web site by user, such as cookies or web logs containing similar information, are not used. The next phase of web usage mining is discovering frequent user navigation patterns. In this phase, pattern discovery methods are applied on the reconstructed sessions obtained in the first phas...

  2. COMPARISON OF THE ENVIRONMENTAL IMPACT OF DIFFERENT METHODS OF MINING WASTE DISPOSAL TECHNOLOGY USING AHP METHOD

    Directory of Open Access Journals (Sweden)

    Justyna Kubicz

    2016-05-01

    Full Text Available Exploitation of tailing ponds sites for storing all types of waste materials creates multiple problems concerning waste disposal and the environmental impact of the waste. Tailing ponds waste may comprise e.g. flotation tailings from ore enrichment plants. Despite the fact that companies / corporations use state-of-the-art methods of extraction and processing of copper ore, and introduce modern systems of organization and production management, the area located closest to the reservoir is exposed to its negative effects. Many types of waste material are a valuable source of secondary raw materials which are suitable for use by various industries. Examples of such materials are mining waste (flotation tailings, usually neutral to the environment, whose quantities produced in the process of exploitation of minerals is sizeable. The article compares different technological methods of mining waste disposal using AHP method and their environmental impact.

  3. An Empirical Study on the Effect of Different Technology Environments on Students’ Assessment

    DEFF Research Database (Denmark)

    Khalid, Md. Saifuddin; Sujan, Khaled Mahmud; Haque, Indrani

    2011-01-01

    in Bangladesh attended MCQ tests under the same instructor’s lecture and appeared for the tests using paper based, web-based and mobile SMS-based testing systems. Results of such tests are analyzed. The variance test shows that paper-based, web-based and mobile-based test scores do not vary. Problems......Multiple choice question (MCQ)-based assessment for higher education students can be a solution to reduce workload where teacher-student ratio is significantly high and also in distance learning approaches. Originating from the users problem claiming that “web-based and mobile-based tests...... are inconvenient and does not allow expected performance”, this research poses the question, “Does use of different technology environment has any positive or negative effect on the students’ assessment or performance?” To seek answer to this question, students of three sections of a private university...

  4. Frequent users of the pediatric emergency department.

    Science.gov (United States)

    Seguin, Jade; Osmanlliu, Esli; Zhang, Xun; Clavel, Virginie; Eisman, Harley; Rodrigues, Robert; Oskoui, Maryam

    2017-04-06

    Emergency department (ED) crowding is associated with increased morbidity and mortality. Its etiology is multifactorial, and frequent ED use (defined as more or equal to five visits per year) is a major contributor to high patient volumes. Our primary objective is to characterize the frequent user population. Our secondary objective is to examine risk factors for frequent emergency use. We conducted a retrospective cohort study of pediatric emergency department (PED) visits at the Montreal Children's Hospital using the Système Informatique Urgence (SIURGE), electronic medical record database. We analysed the relation between patient's characteristics and the number of PED visits over a 1-year period following the index visit. Patients totalling 52,088 accounted for 94,155 visits. Of those, 2,474 (4.7%) patients had five and more recurrent visits and accounted for 16.6% (15,612 visits) of the total PED visits. Lower level of acuity at index visit (odds ratio [OR] 0.85) was associated with a lower number of recurrent visits. Lower socioeconomic status (social deprivation index OR 1.09, material deprivation index OR 1.08) was associated with a higher number of recurrent visits. Asthma (OR 1.57); infectious ear, nose, and sinus disorders (OR 1.33); and other respiratory disorders (OR 1.56) were independently associated with a higher incidence of a recurrent visit within the year following the first visit. Our study is the first Canadian study to assess risk factors of frequent pediatric emergency use. The identified risk factors and diagnoses highlight the need for future evidence-based, targeted innovative research evaluating strategies to minimize ED crowding, to improve health outcomes and to improve patient satisfaction.

  5. Botulism: A Frequently Forgotten Old Malady

    Directory of Open Access Journals (Sweden)

    Teguh Thajeb

    2007-09-01

    Full Text Available A frequently forgotten old malady called botulism has been recognized for more than a century. This ailment occurs worldwide, afflicts human of all age groups from infants to elderly and affects Oriental people more often in several regions of China. Occurrence in Taiwan is uncommon, and therefore, it is often overlooked. The outbreaks of human botulism in various regions of the world, the clinical types, the molecular mechanisms, and the electrophysiologic findings will be highlighted.

  6. Clinical outcomes of three different crown systems with CAD/CAM technology.

    Science.gov (United States)

    Batson, Emily R; Cooper, Lyndon F; Duqum, Ibrahim; Mendonça, Gustavo

    2014-10-01

    Computer-aided design and computer-aided manufacturing (CAD/CAM) generated restorations are gaining popularity. However, limited clinical evidence is available for single-unit posterior CAD/CAM restorations fabricated with established and newer crown materials. The purpose of this clinical study was to assess the restoration quality of and gingival response to CAD/CAM fabricated posterior single-tooth restorations with different processing technologies. Twenty-two individuals in need of posterior complete coverage crowns were recruited under an institutional review board approved protocol. Teeth were randomized to 1 of 3 groups: metal ceramic, lithium disilicate, and monolithic zirconia. An unprepared or minimally restored tooth on the contralateral side was chosen as a control tooth for gingival measurements with each participant. Teeth were prepared and scanned intraorally by 1 of 3 experienced practitioners. A total of 32 restorations were digitally designed and fabricated with either milling technology or rapid-prototype printing and casting with conventional porcelain application. Restorations were evaluated with modified United States Public Health Service criteria for contour, marginal adaptation, occlusion, and shade. Gingival crevicular fluid volume and bleeding on probing were recorded preoperatively, at 1-month and 6-month postcementation visits. Polyvinyl siloxane impressions were made of the buccal margin of cemented restorations and evaluated with microcomputed tomography to assess marginal adaptation (horizontal discrepancy). The Mantel Haenszel row mean score was used to assess whether the crown systems differed with respect to the modified United States Public Health Service criteria. Linear mixed models were used to assess whether the average gingival volumes were affected by the explanatory variables (crown system, tooth status [treated vs control], or visit). A generalized estimating equation approach was used to assess whether bleeding on

  7. A New Algorithm for Mining Frequent Pattern

    Institute of Scientific and Technical Information of China (English)

    李力; 靳蕃

    2002-01-01

    Mining frequent pattern in transaction database, time-series databases, and many other kinds of databases have been studied popularly in data mining research. Most of the previous studies adopt Apriori-like candidate set generation-and-test approach. However, candidate set generation is very costly. Han J. proposed a novel algorithm FP-growth that could generate frequent pattern without candidate set. Based on the analysis of the algorithm FP-growth, this paper proposes a concept of equivalent FP-tree and proposes an improved algorithm, denoted as FP-growth*, which is much faster in speed, and easy to realize. FP-growth* adopts a modified structure of FP-tree and header table, and only generates a header table in each recursive operation and projects the tree to the original FP-tree. The two algorithms get the same frequent pattern set in the same transaction database, but the performance study on computer shows that the speed of the improved algorithm, FP-growth*, is at least two times as fast as that of FP-growth.

  8. Local participation in complex technological projects as bridging between different communities in Belgium

    NARCIS (Netherlands)

    Sips, K.; Craps, M.; Dewulf, A.

    2013-01-01

    Local community participation in complex technological projects, where technological innovations and risks need to be managed, is notoriously challenging. Relations with local inhabitants easily take the form of exclusion, protest, controversy or litigation. While such projects represent

  9. Readiness Assessment Tests versus Frequent Quizzes: Student Preferences

    Science.gov (United States)

    Weinstein, Suzanne E.; Wu, Shao-Wei

    2009-01-01

    This study compares the effectiveness of two different assessment techniques; readiness assessment tests (RATs) and frequent quizzing. We report student perceptions of the impact of these techniques on the number of readings done prior to the class period, thorough reading of assignments, ability to follow class discussions, ability to participate…

  10. The arils characterization of five different pomegranate (Punica granatum) genotypes stored after minimal processing technology.

    Science.gov (United States)

    Ghasemnezhad, Mahmood; Zareh, Somayeh; Shiri, Mohammad Ali; Javdani, Zahra

    2015-04-01

    In this study, the quality of minimally processed different Iranian pomegranate genotypes was investigated during storage at 4 °C for 14 days. The results showed that at the end of storage time, the lowest microbial count was found on the arils of "Torsh Syabe Lorestan" genotype. There was a significant difference in titratable acidity, total soluble solids, total anthocyanin, catechin, and quercetin content in most genotypes after 14-day cold storage; while no difference was found between studied genotypes in antioxidant capacity, total phenolic, and flavonoid content. In general, total phenolic content and antioxidant capacity of pomegranate arils gradually decreased over storage time. Diphenolase activity of polyphenol oxidase (PPO) enzyme with dopamine hydrochloride substrate and peroxidase (POD) decreased over storage time, whereas diphenolase activity of PPO with pyrocatechol substrate significantly increased. The lowest diphenolase activity with dopamine hydrochloride and pyrocatechol substrates, as well as POD activity was found in Torsh Syabe Lorestan. The results suggested that the genotype of Torsh Syabe Lorestan, which showed the lowest microbial count on the arils and enzymes, could be more appropriate for minimal processing technology.

  11. Gender difference in work-family conflict among Japanese information technology engineers with preschool children.

    Science.gov (United States)

    Watai, Izumi; Nishikido, Noriko; Murashima, Sachiyo

    2008-01-01

    Since the Family Policy Act, which requires companies to develop action plans to support their employees who have children in an attempt to reverse the declining birthrate in Japan, was enacted in 2003, many Japanese organizations and occupational health staff have become interested in work-family conflict (WFC), especially WFC in employees with young children. A cross-sectional survey of regularly employed information technology (IT) engineers with preschool children in Japan was conducted to examine the gender difference in WFC, relationship of WFC with outcomes, and predictors of WFC by gender. Data from 78 male and 102 female respondents were analyzed. There was no significant gender difference in total level of WFC. However, the level of work interference with family (WIF) was significantly higher in males than in females and the level of family interference with work (FIW) was significantly higher in females. Regarding outcomes, WIF was significantly related to depression and fatigue in both genders. Moreover, different predictors were related to WIF and FIW by gender. A family-friendly culture in the company was related to WIF only in males. To prevent depression and cumulative fatigue in employees with young children, occupational practitioners have to pay attention to not only employees' work stress but also their family stress or amount of family role in both genders.

  12. Managing the Classroom with Technology. On Progress Reports and Online Communications, and How To Manage the Two Different Communication Techniques.

    Science.gov (United States)

    Kasprowicz, Tim

    2002-01-01

    Describes how one teacher bridged the communications gap among teachers, parents, and students through the use of technology in managing his classroom. Discusses progress reports and online communications and how to manage the two different communication techniques. (JOW)

  13. Significant Interval and Frequent Pattern Discovery in Web Log Data

    CERN Document Server

    Saxena, Kanak

    2010-01-01

    There is a considerable body of work on sequence mining of Web Log Data. We are using One Pass frequent Episode discovery (or FED) algorithm, takes a different approach than the traditional apriori class of pattern detection algorithms. In this approach significant intervals for each Website are computed first (independently) and these interval used for detecting frequent patterns/Episode and then the Analysis is performed on Significant Intervals and frequent patterns That can be used to forecast the user's behavior using previous trends and this can be also used for advertising purpose. This type of applications predicts the Website interest. In this approach, time-series data are folded over a periodicity (day, week, etc.) Which are used to form the Interval? Significant intervals are discovered from these time points that satisfy the criteria of minimum confidence and maximum interval length specified by the user.

  14. Rotavirus is frequent among adults hospitalised for acute gastroenteritis

    DEFF Research Database (Denmark)

    Lausch, Karen Rokkedal; Westh, Lena; Kristensen, Lena Hagelskjær;

    2017-01-01

    INTRODUCTION: Rotavirus infection is the most common aetiology of acute gastroenteritis (AGE) among young children. In adults, diagnostics focus mainly on bacterial causes, though recent studies suggest that rotavirus is a frequent agent. The aim of this study was to examine the proportion...... culture for bacterial pathogens. RESULTS: A total of 265 adult patients were included. 9.4% tested positive for rotavirus. Enteropathogenic bacteria were found in 24.5% of the cases. In the majority of cases (62.3%), no pathogen was found. Overall, rotavirus was the second-most frequent pathogen, exceeded...... only by Campylobacter spp. Immunosuppression and a C-reactive protein (CRP) below 50 mg/l (0-8 mg/l) were associated with rotavirus. The seasonality of rotavirus differed markedly from that of bacterial gastroenteritis. CONCLUSION: Rotavirus is the second-most frequently identified pathogen in adults...

  15. Assessment of RF exposures from emerging wireless communication technologies in different environments.

    Science.gov (United States)

    Joseph, Wout; Verloock, Leen; Goeminne, Francis; Vermeeren, Gönter; Martens, Luc

    2012-02-01

    In situ electromagnetic (EM) radio frequency (RF) exposure to base stations of emerging wireless technologies is assessed at 311 locations, 68 indoor and 243 outdoor, spread over 35 areas in three European countries (Belgium, The Netherlands, and Sweden) by performing narrowband spectrum analyzer measurements. The locations are selected to characterize six different environmental categories (rural, residential, urban, suburban, office, and industrial). The maximal total field value was measured in a residential environment and equal to 3.9 V m(-1), mainly due to GSM900 signals. Exposure ratios for maximal electric field values, with respect to ICNIRP reference levels, range from 0.5% (WiMAX) to 9.3% (GSM900) for the 311 measurement locations. Exposure ratios for total field values vary from 3.1% for rural environments to 9.4% for residential environments. Exposures are lognormally distributed and are the lowest in rural environments and the highest in urban environments. Highest median exposures were obtained in urban environments (0.74 V m(-1)), followed by office (0.51 V m(-1)), industrial (0.49 V m(-1)), suburban (0.46 V m(-1)), residential (0.40 V m(-1)), and rural (0.09 V m(-1)) environments. The average contribution to the total electric field is more than 60% for GSM. Except for the rural environment, average contributions of UMTS-HSPA are more than 3%. Contributions of the emerging technologies LTE and WiMAX are on average less than 1%. The dominating outdoor source is GSM900 (95 percentile of 1.9 V m(-1)), indoor DECT dominates (95 percentile of 1.5 V m(-1)).

  16. Conclusions from Ufa, Russia, drinking water dioxin cleanup experiments involving different treatment technologies.

    Science.gov (United States)

    Smirnov, A D; Schecter, A; Papke, O; Beljak, A A

    1996-02-01

    The city of Ufa, in the Bashkortostan Republic of Russia, is believed to have dioxin contamination of its water supply from 30 years of gas ejections, sewage and buried sludge from the Chimprom industrial factory, and possibly other sources. A project was developed to provide technology at relatively low cost for treating dioxin contaminated water in routine and also in emergency situations. This paper describes the results of the 15-year research project to remove dioxins from drinking water. Three different methods were experimentally tested for efficiency at removing dioxins from tap water. The methods used were: (1) ozonization plus filtration through powder sorbents, (2) filtration through sand, and (3) filtration through granulated sorbents. It was found that the method of filtration through granulated sorbents was most effective at removing dioxins from water: 90-95% of all PCDD and PCDF isomers were removed from water samples. This research also shows that the most toxic congener, 2,3,7,8-TCDD, can be removed effectively and efficiently. In addition, there are no significant differences between the extractability of PCDDs and PCDFs. Reductions in exposure to humans from contaminated drinking water can be accomplished via sorptive water treatments for relatively reasonable cost, making this a practical approach. This method of decreasing toxic chemicals is being implemented in Ufa, Russia.

  17. Dental Management of Frequent Childhood Hemoglobinopathies

    Directory of Open Access Journals (Sweden)

    iffet Yazicioglu

    2014-06-01

    Full Text Available Hemoglobinopaties are important in the context of childhood chronical disease due to their potential of being the most frequent genetical diseases. Abnormal hemoglobins are in general harmless however in some situations oxygen instabillity can occur. Those instabilities can effect dental health negatively or dental helath can stimulate the symptoms of the genetical disease. With the consultation of Medical doctor Dentist with adequit knowledge would apply dental treatment safely and eliminate the inconvinience of children. [Archives Medical Review Journal 2014; 23(3.000: 469-483

  18. Optimal growth of frequently hypercyclic entire functions

    CERN Document Server

    Drasin, David

    2011-01-01

    We solve a problem posed by A. Bonilla and K.-G. Grosse-Erdmann by constructing an entire function $f$ that is frequently hypercyclic with respect to the differentiation operator, and satisfies $M_f(r)\\leq\\displaystyle ce^r r^{-1/4}$, where $c>0$ be chosen arbirarily small. The obtained growth rate is sharp. We also obtain optimal results for the growth when measured in terms of average $L^p$-norms. Among other things, the proof applies Rudin-Shapiro polynomials and heat kernel estimates.

  19. Frequent MAGE mutations in human melanoma.

    Directory of Open Access Journals (Sweden)

    Otavia L Caballero

    Full Text Available BACKGROUND: Cancer/testis (CT genes are expressed only in the germ line and certain tumors and are most frequently located on the X-chromosome (the CT-X genes. Amongst the best studied CT-X genes are those encoding several MAGE protein families. The function of MAGE proteins is not well understood, but several have been shown to potentially influence the tumorigenic phenotype. METHODOLOGY/PRINCIPAL FINDINGS: We undertook a mutational analysis of coding regions of four CT-X MAGE genes, MAGEA1, MAGEA4, MAGEC1, MAGEC2 and the ubiquitously expressed MAGEE1 in human melanoma samples. We first examined cell lines established from tumors and matching blood samples from 27 melanoma patients. We found that melanoma cell lines from 37% of patients contained at least one mutated MAGE gene. The frequency of mutations in the coding regions of individual MAGE genes varied from 3.7% for MAGEA1 and MAGEA4 to 14.8% for MAGEC2. We also examined 111 fresh melanoma samples collected from 86 patients. In this case, samples from 32% of the patients exhibited mutations in one or more MAGE genes with the frequency of mutations in individual MAGE genes ranging from 6% in MAGEA1 to 16% in MAGEC1. SIGNIFICANCE: These results demonstrate for the first time that the MAGE gene family is frequently mutated in melanoma.

  20. Technology.

    Science.gov (United States)

    Online-Offline, 1998

    1998-01-01

    Focuses on technology, on advances in such areas as aeronautics, electronics, physics, the space sciences, as well as computers and the attendant progress in medicine, robotics, and artificial intelligence. Describes educational resources for elementary and middle school students, including Web sites, CD-ROMs and software, videotapes, books,…

  1. A Frame Work for Frequent Pattern Mining Using Dynamic Function

    Directory of Open Access Journals (Sweden)

    Sunil Joshi

    2011-05-01

    Full Text Available Discovering frequent objects (item sets, sequential patterns is one of the most vital fields in data mining. It is well understood that it require running time and memory for defining candidates and this is the motivation for developing large number of algorithm. Frequent patterns mining is the paying attention research issue in association rules analysis. Apriori algorithm is a standard algorithm of association rules mining. Plenty of algorithms for mining association rules and their mutations are projected on the foundation of Apriori Algorithm. Most of the earlier studies adopted Apriori-like algorithms which are based on generate-and-test candidates theme and improving algorithm approach and formation but no one give attention to the structure of database. Several modifications on apriori algorithms are focused on algorithm Strategy but no one-algorithm emphasis on least transaction and more attribute representation of database. We presented a new research trend on frequent pattern mining in which generate Transaction pair to lighten current methods from the traditional blockage, providing scalability to massive data sets and improving response time. In order to mine patterns in database with more columns than rows, we proposed a complete framework for the frequent pattern mining. A simple approach is if we generate pair of transaction instead of item id where attributes are much larger then transaction so result is very fast. Newly, different works anticipated a new way to mine patterns in transposed databases where there is a database with thousands of attributes but merely tens of stuff. We suggest a novel dynamic algorithm for frequent pattern mining in which generate transaction pair and for generating frequent pattern we find out by longest common subsequence using dynamic function. Our solutions give result more rapidly. A quantitative investigation of these tradeoffs is conducted through a wide investigational study on artificial and

  2. Web versus app: compliance of patients in a telehealth diabetes management programme using two different technologies.

    Science.gov (United States)

    Schreier, Günter; Eckmann, Harald; Hayn, Dieter; Kreiner, Karl; Kastner, Peter; Lovell, Nigel

    2012-12-01

    Patients with diabetes were enrolled into a telemonitoring programme. They were offered the choice of collecting their health data either by using Near Field Communication (NFC) enabled mobile phones equipped with a dedicated application (App), or by means of a web-browser based user interface (Web). At the end of the study, each patient was categorized as belonging to either the App or Web group, based on the proportion of data they had transmitted using each method. Of the 403 patients, there were 291 in the App group and 112 in the Web group. The two groups were similar in their demographics, except for gender distribution where 68% of men preferred using the App method in contrast to 95% for women (P < 0.001). Kaplan-Meier analysis showed a steady decline of the compliance rate for both groups, at a similar rate during the first year. It also showed a more rapid decline of the compliance rate thereafter for the Web group, which resulted in a significantly higher rate for the App group over the whole observation period (P = 0.03). We conclude that different types of data acquisition technologies may have an important effect on patients' willingness to participate in telehealth programmes in the long-term.

  3. FERMENTATION OF GLUCOSE AND XYLOSE IN CATTAIL PROCESSED BY DIFFERENT PRETREATMENT TECHNOLOGIES

    Directory of Open Access Journals (Sweden)

    Bo Zhang,

    2012-05-01

    Full Text Available The effects of different pretreatment technologies, including sulfuric acid, hot-water, NaOH, and MgCl2 pretreatments, on the fermentation of xylose and glucose to ethanol by Saccharomyces cerevisiae ATCC 24858 and Escherichia coli KO11 were investigated. In this study, cattail was used as the feedstock. The use of aquatic plant cattails to produce biofuel will add value to land and reduce emissions of greenhouse gases by replacing petroleum products. The pretreated biomass first was enzymatically hydrolyzed for 2 days, followed by a 2-day Simultaneous Saccharification and Fermentation (SSF using S. cerevisiae. The glucose to ethanol yields were approximately 85 to 91% of the theoretical yield for this S. cerevisiae strain. Glucose and xylose released from cattail cellulose and hemicellulose could be fermented to ethanol using E. coli KO11, resulting in approximately 85% of the theoretical ethanol yield using either a Separate Hydrolysis and Fermentation (SHF process or a SSF process. In order to improve the sugars to ethanol yields, a detoxification process is necessary to remove the inhibitory compounds produced during the acid pretreatment process. Among the four pretreatment methods, the dilute acid pretreatment was found to be superior, and additional research is required to optimize the economics of the overall biorefinery process.

  4. Solidification microstructure of M2 high speed steel by different casting technologies

    Directory of Open Access Journals (Sweden)

    Zhou Xuefeng

    2011-08-01

    Full Text Available The present work investigated the solidification microstructure of AISI M2 high speed steel manufactured by different casting technologies, namely iron mould casting and continuous casting. The results revealed that the as-cast structure of the steel was composed of the iron matrix and the M2C eutectic carbide networks, which were greatly refined in the ingot made by continuous casting process, compared with that by the iron mould casting process. M2C eutectic carbides presented variation in their morphologies and growth characteristics in the ingots by both casting methods. In the ingot by iron mould casting, they have a plate-like morphology and grow anisotropically. However, in the ingot made by continuous casting, the carbides evolved into the fiber-like shape that exhibited little characteristics of anisotropic growth. It was noticed that the fiber-like M2C was much easier to decompose and spheroidize after heated, as a result, the carbides refined remarkably, compared with the case of plate-like carbides in the iron mould casting ingot.

  5. Perceived Quality of Information Technology Services: The Role of Technostress and Individual Differences

    Directory of Open Access Journals (Sweden)

    Danilo Magno Marchiori

    2015-12-01

    Full Text Available The aim was to identify if the elements of the service encounter and technostress creators affect the perceived service quality provided by internal information technology department, through the realization of a theoretical and empirical research. Quantitative and descriptive in its approach, the study was conducted with 138 users of IT services who work at a federal organization operating in the state of Espírito Santo. This research tested the direct influence of the three elements of service encounter (i.e. service product, service delivery and service environment and four causal factors of technostress (techno-overload, techno-invasion, techno-complexity and techno-uncertainty. In addition, the research tested whether the individual characteristics of users (i.e. gender, age, education, current experience, previous experience and location of work produced statistically significant differences when compared to their perception of the overall quality of services. The results generated through multiple regression showed that the overall quality of services was explained by the service product, service environment, service delivery and techno-complexity variables. Upon comparison, the statistical averages inferred that employees who work in decentralized organizational units, specializing in public service, rated the overall quality of services more positively.

  6. COMPARATIVE EVALUATION OF QUALITATIVE VALUES IN GERMINATED AND UNGERMINATED WHEAT GRAIN GROWN IN DIFFERENT TECHNOLOGIES

    Directory of Open Access Journals (Sweden)

    Ingrida Kraujutiene

    2010-01-01

    Full Text Available To estimate an influence of different growing technologies (organical and conventional, separate cultivars of wheat (Širvinta-1 and Zentos and germinating time upon wheat grain nutritive composition (dry matter, ash, protein, fat and fibre, activity of enzymes (α- and β-amylase, xylanase, cellulose, catalase and protease. It was established that the amount of dry matters reduced in germinated wheat and the content of mineral substances, protein and activity of ferments  and β-amylases, cellulase, proteases and maltase was greater than in ungerminated wheat. Furthermore, the amount of cellulase reduced due to growing conditions and the distribution of fat amount was ambiguous regarding wheat species. (Širvinta-1: germinated > ungerminated and Zentos: germinated < ungerminated. The amounts of cellulase and the activity of ferments in ecologically grown wheat, both germinated and ungerminated were greater than in those conventionally grown, with exception of ferments of cellulase and protease. The activity of cellulase in ecologically grown grain was 39 % less and the content of protease was almost the same as in those conventionally grown.

  7. Study on mechanisms of different sulfuric acid leaching technologies of chromite

    Science.gov (United States)

    Shi, Pei-yang; Liu, Cheng-jun; Zhao, Qing; Shi, Hao-nan

    2017-09-01

    The extraction of chromate from chromite via the sulfuric acid leaching process has strong potential for practical use because it is a simple and environmentally friendly process. This paper aims to study the sulfuric acid leaching process using chromite as a raw material via either microwave irradiation or in the presence of an oxidizing agent. The results show that the main phases in Pakistan chromite are ferrichromspinel, chrompicotite, hortonolite, and silicate embedded around the spinel phases. Compared with the process with an oxidizing agent, the process involving microwaves has a higher leaching efficiency. When the mass fraction of sulfuric acid was 80% and the leaching time was 20 min, the efficiency could exceed 85%. In addition, the mechanisms of these two technologies fundamentally differ. When the leaching was processed in the presence of an oxidizing agent, the silicate was leached first and then expanded. By contrast, in the case of leaching under microwave irradiation, the chromite was dissolved layer by layer and numerous cracks appeared at the particle surface because of thermal shock. In addition, the silicate phase shrunk instead of expanding.

  8. Frequently asked questions about global modeling

    Science.gov (United States)

    Letellier, Christophe; Aguirre, Luis A.; Freitas, U. S.

    2009-06-01

    When a global model is attempted from experimental data, some preprocessing might be required. Therefore it is only natural to wonder what kind of effects the preprocessing might have on the modeling procedure. This concern is manifested in the form of recurrent frequently asked questions, such as "how does the preprocessing affect the underlying dynamics?" This paper aims at providing answers to important questions related to (i) data interpolation, (ii) data smoothing, (iii) data-estimated derivatives, (iv) model structure selection, and (v) model validation. The answers provided will hopefully remove some of those doubts and one shall be more confident not only on global modeling but also on various data analyses which may be also dependent on data preprocessing.

  9. Bladder injuries frequently missed in polytrauma patients

    Directory of Open Access Journals (Sweden)

    Tanweer Karim

    2010-05-01

    Full Text Available Tanweer Karim, Margaret Topno, Vinod Sharma, Raymond Picardo, Ankur HastirSurgery, MGM Medical College, Kamothe, Navi Mumbai, IndiaAbstract: Bladder injuries are very common in patients who have had road traffic accidents. The method of diagnosis and management of such injuries is well established and accepted. However, trauma to the bladder can be associated with other life-threatening injuries which are frequently missed, and often diagnosed during laparotomy for other reasons. The aim of this study was to diagnose bladder injury in polytrauma patients as early as possible, taking into consideration the fact that these patients are hemodynamically unstable and require rapid evaluation and management. In order to achieve our objective, we used bedside sonography with retrograde instillation of normal saline to diagnose bladder injury in addition to use of the conventional retrograde cystogram.Keywords: bladder injury, bladder rupture, retrograde cystogram

  10. LGM: Mining Frequent Subgraphs from Linear Graphs

    CERN Document Server

    Tabei, Yasuo; Hirose, Shuichi; Tsuda, Koji

    2011-01-01

    A linear graph is a graph whose vertices are totally ordered. Biological and linguistic sequences with interactions among symbols are naturally represented as linear graphs. Examples include protein contact maps, RNA secondary structures and predicate-argument structures. Our algorithm, linear graph miner (LGM), leverages the vertex order for efficient enumeration of frequent subgraphs. Based on the reverse search principle, the pattern space is systematically traversed without expensive duplication checking. Disconnected subgraph patterns are particularly important in linear graphs due to their sequential nature. Unlike conventional graph mining algorithms detecting connected patterns only, LGM can detect disconnected patterns as well. The utility and efficiency of LGM are demonstrated in experiments on protein contact maps.

  11. Using Digital Technology to See Angles from Different Angles. Part 2: Openings and Turns

    Science.gov (United States)

    Host, Erin; Baynham, Emily; McMaster, Heather

    2015-01-01

    Ever wondered how to use technology to teach angles? This article follows on from an earlier article published last year, providing a range of ideas for integrating technology and concrete materials with the teaching of angle concepts. The authors also provide a comprehensive list of free online games and learning objects that can be used to teach…

  12. Understanding differences in the diffusion of environmentally beneficial technology. Final project report

    Energy Technology Data Exchange (ETDEWEB)

    Blackman, A.; Boyd, J.; Simpson, R.D.; Toman, M.

    1996-12-31

    The factors affecting the diffusion of technical discoveries among firms and nations remain one of the most interesting and important but least understood elements of economic behavior. Recently, interest in technology diffusion has been heightened by a recognition that the spread of technologies could have important implications for environmental quality as well as for market goods and services. A specific motivation for this study was the question of how rapidly technologies that reduce greenhouse gas emissions might diffuse. Technologies in this category include technologies that improve the efficiency of fossil energy use or promote substitution of renewable energy resources. The speed with which these technologies spread could have a significant effect on the rate of accumulation of carbon in the atmosphere. From a modeling perspective, the rate of innovation and diffusion of carbon-reducing technology is known to be a crucial parameter in integrated assessments of climate change risks and policy responses. Thus, a better understanding of factors that might influence the spread of carbon-reducing technologies could be valuable in studies on long-term global change and policy assessment.

  13. Technological learning in offshore wind energy: Different roles of the government

    NARCIS (Netherlands)

    Smit, T.; Junginger, M.; Smits, R.E.H.M.

    2007-01-01

    Offshore wind energy is a promising source of renewable electricity, even though its current costs prevent large-scale implementation. Technological learning has improved the technology and its economic performance already, and could result in significant further improvements. This study investigate

  14. Frequent activation of EGFR in advanced chordomas

    Directory of Open Access Journals (Sweden)

    Dewaele Barbara

    2011-07-01

    Full Text Available Abstract Background Chordomas are rare neoplasms, arising from notochordal remnants in the midline skeletal axis, for which the current treatment is limited to surgery and radiotherapy. Recent reports suggest that receptor tyrosine kinases (RTK might be essential for the survival or proliferation of chordoma cells, providing a rationale for RTK targeted therapy. Nevertheless, the reported data are conflicting, most likely due to the assorted tumor specimens used for the studies and the heterogeneous methodological approaches. In the present study, we performed a comprehensive characterization of this rare entity using a wide range of assays in search for relevant therapeutic targets. Methods Histopathological features of 42 chordoma specimens, 21 primary and 21 advanced, were assessed by immunohistochemistry and fluorescent in situ hybridization (FISH using PDGFRB, CSF1R, and EGFR probes. Twenty-two of these cases, for which frozen material was available (nine primary and 13 advanced tumors, were selectively analyzed using the whole-genome 4.3 K TK-CGH-array, phospho-kinase antibody array or Western immunoblotting. The study was supplemented by direct sequencing of KIT, PDGFRB, CSF1R and EGFR. Results We demonstrated that EGFR is frequently and the most significantly activated RTK in chordomas. Furthermore, concurrent to EGFR activation, the tumors commonly reveal co-activation of alternative RTK. The consistent activation of AKT, the frequent loss of the tumor suppressor PTEN allele, the recurrent activation of upstream RTK and of downstream effectors like p70S6K and mTOR, all indicate the PI3K/AKT pathway as an important mediator of transformation in chordomas. Conclusions Given the complexity of the signaling in chordomas, combined treatment regimens targeting multiple RTK and downstream effectors are likely to be the most effective in these tumors. Personalized therapy with careful selection of the patients, based on the molecular profile of

  15. Performance Evaluation of Frequent Subgraph Discovery Techniques

    OpenAIRE

    Saif Ur Rehman; Sohail Asghar; Yan Zhuang; Simon Fong

    2014-01-01

    Due to rapid development of the Internet technology and new scientific advances, the number of applications that model the data as graphs increases, because graphs have highly expressive power to model a complicated structure. Graph mining is a well-explored area of research which is gaining popularity in the data mining community. A graph is a general model to represent data and has been used in many domains such as cheminformatics, web information management system, computer network, and bi...

  16. Carbon Footprint Analyses of Mainstream Wastewater Treatment Technologies under Different Sludge Treatment Scenarios in China

    Directory of Open Access Journals (Sweden)

    Chunyan Chai

    2015-03-01

    Full Text Available With rapid urbanization and infrastructure investment, wastewater treatment plants (WWTPs in Chinese cities are putting increased pressure on energy consumption and exacerbating greenhouse gas (GHG emissions. A carbon footprint is provided as a tool to quantify the life cycle GHG emissions and identify opportunities to reduce climate change impacts. This study examined three mainstream wastewater treatment technologies: Anaerobic–Anoxic–Oxic (A–A–O, Sequencing Batch Reactor (SBR and Oxygen Ditch, considering four different sludge treatment alternatives for small-to-medium-sized WWTPs. Following the life cycle approach, process design data and emission factors were used by the model to calculate the carbon footprint. Results found that direct emissions of CO2 and N2O, and indirect emissions of electricity use, are significant contributors to the carbon footprint. Although sludge anaerobic digestion and biogas recovery could significantly contribute to emission reduction, it was less beneficial for Oxygen Ditch than the other two treatment technologies due to its low sludge production. The influence of choosing “high risk” or “low risk” N2O emission factors on the carbon footprint was also investigated in this study. Oxygen Ditch was assessed as “low risk” of N2O emissions while SBR was “high risk”. The carbon footprint of A–A–O with sludge anaerobic digestion and energy recovery was more resilient to changes of N2O emission factors and control of N2O emissions, though process design parameters (i.e., effluent total nitrogen (TN concentration, mixed-liquor recycle (MLR rates and solids retention time (SRT and operation conditions (i.e., nitrite concentration are critical for reducing carbon footprint of SBR. Analyses of carbon footprints suggested that aerobic treatment of sludge not only favors the generation of large amounts of CO2, but also the emissions of N2O, so the rationale of reducing aerobic treatment and

  17. Dosimetry study of different irradiation technologies for patients with recurrence of cervical cancer

    Directory of Open Access Journals (Sweden)

    Jian NING

    2011-07-01

    Full Text Available Objective To compare the dosimetric characteristics of intensity-modulated radiation therapy(IMRT,three-dimensional conformal radiation therapy(3D-CRT and super gamma knife arc conformal radiotherapy(SGS-CRT for patients with recurrence of cervical cancer.Methods Treatment planning of IMRT,3D-CRT and SGS-CRT for 15 patients with recurrence of cervical cancer was designed,and the prescription dose(50Gy,2.0Gy×25 covered 95% of the planning target volume(PTV.The dosimetric characteristics of the 3 irradiation technologies in target region and organs at risk were compared by analyzing dose-volume histogram(DVH.Results The target volume of 95% prescription dose was significantly higher in 3D-CRT(99.9%±0.2% than in IMRT(99.5%±0.5% and SGS-CRT(99.3%±0.8%,P < 0.05;the dose gradient of target region was significantly higher in SGS-CRT(85%±20% than in IMRT(10%±7% and 3D-CRT(8%±5%,P < 0.05;the conformal index of target region was higher in IMRT(0.9±0.3 than in SGS-CRT(0.8±0.2,P < 0.05,and the latter was higher than that in 3D-CRT(0.7±0.5,P < 0.05.The DVH showed that the radiation volumes of bladder was lower in SGS-CRT(27.8% than in IMRT(40.1% and 3D-CRT(57.4%,P < 0.05 when the dosage ranged from 10 to 30 Gy,and the radiation volumes of rectum was lower in SGS-CRT(25.4% than in IMRT(48.9% and 3D-CRT(73.2%,P < 0.05 when the dosage ranged from 5 to 45 Gy,while there was no significant difference among the 3 irradiation technologies of the radiation volumes of small bowel.Conclusion SGS-CRT shows some dosimetric advantages in treating patients with recurrence of cervical cancer.

  18. Use of emerging technologies to assess differences in outdoor physical activity in St. Louis, Missouri

    Directory of Open Access Journals (Sweden)

    Deepti eAdlakha

    2014-05-01

    Full Text Available IntroductionAbundant evidence shows that regular physical activity (PA is an effective strategy for preventing obesity in people of diverse socioeconomic status (SES and race groups. The proportion of PA performed in parks and how this differs by proximate neighborhood SES has not been thoroughly investigated. The present project analyzes online public web data feeds to assess differences in outdoor PA by neighborhood SES in St. Louis, Missouri, US.MethodsFirst, running and walking routes submitted by users of the website MapMyRun.com were downloaded. The website enables participants to plan, map, record, and share their exercise routes and outdoor activities like runs, walks, and hikes in an online database. Next, the routes were visually illustrated using Geographic Information Systems (GIS. Thereafter, using park data and 2010 Missouri census poverty data, the odds of running and walking routes traversing a low-SES neighborhood, and traversing a park in a low-SES neighborhood were examined in comparison to routes in high-SES neighborhoods and high-SES parks.Results Results show that a majority of running and walking routes occur in, or at least traverse through a park. However, this finding does not hold when comparing low-SES neighborhoods to higher-SES neighborhoods in St. Louis. The odds of running in a park in a low-SES neighborhood were 54 percent lower than running in a park in a higher-SES neighborhood (OR=0.46, CI=0.17-1.23. The odds of walking in a park in a low-SES neighborhood were 17 percent lower than walking in a park in a higher-SES neighborhood (OR = 0.83, CI = 0.26-2.61.ConclusionsThe novel methods of this study include the use of inexpensive, unobtrusive, and publicly available web data feeds to evaluate PA in parks and differences by neighborhood SES. Emerging technologies like MapMyRun.com present significant advantages to enhance tracking of user-defined PA across large geographic and temporal settings.

  19. Technology

    Directory of Open Access Journals (Sweden)

    Xu Jing

    2016-01-01

    Full Text Available The traditional answer card reading method using OMR (Optical Mark Reader, most commonly, OMR special card special use, less versatile, high cost, aiming at the existing problems proposed a method based on pattern recognition of the answer card identification method. Using the method based on Line Segment Detector to detect the tilt of the image, the existence of tilt image rotation correction, and eventually achieve positioning and detection of answers to the answer sheet .Pattern recognition technology for automatic reading, high accuracy, detect faster

  20. Is It Really Gender? An Empirical Investigation Into Gender Effects In Technology Adoption Through The Examination Of Individual Differences

    Directory of Open Access Journals (Sweden)

    Miguel I. Aguirre-Urreta

    2010-01-01

    Full Text Available A recent development in the technology acceptance literature is the inclusion of gender as a moderator of the relationships between intention and its antecedents, such that some are stronger for men than women, and vice versa. While the effects have been well established, the mechanisms by which they operate, that is, which specific gender differences are in operation and how they affect intention to adopt, have not been thoroughly explored. In this research, psychological constructs with established gender differences, such as core self-evaluations, computer self-efficacy and anxiety, psychological gender-role, and risk-taking propensity, are examined. In addition, this research introduces a novel context for the study of technology adoption in that more than a single alternative is offered to participants, thus requiring a choice among technologies. Results indicate that gender effects are more complex than previously thought, with potentially multiple influences from different facets operating simultaneously.

  1. Occurrence and removal of pharmaceutically active compounds in sewage treatment plants with different technologies

    Science.gov (United States)

    Ying, Guang-Guo; Kookana, Rai S.; Kolpin, Dana W.

    2009-01-01

    Occurrence of eight selected pharmaceutically active compounds (PhACs; caffeine, carbamazepine, triclosan, gemfibrozil, diclofenac, ibuprofen, ketoprofen and naproxen) were investigated in effluents from fifteen sewage treatment plants (STPs) across South Australia. In addition, a detailed investigation into the removal of these compounds was also carried out in four STPs with different technologies (Plant A: conventional activated sludge; plant B: two oxidation ditches; plant C: three bioreactors; and plant D: ten lagoons in series). The concentrations of these compounds in the effluents from the fifteen STPs showed substantial variations among the STPs, with their median concentrations ranging from 26 ng/L for caffeine to 710 ng/L for carbamazepine. Risk assessment based on the "worst case scenario" of the monitoring data from the present study suggested potential toxic risks to aquatic organisms posed by carbamazepine, triclosan and diclofenac associated with such effluent discharge. With the exception of carbamazepine and gemfibrozil, significant concentration decreases between influent and effluent were observed in the four STPs studied in more detail. Biodegradation was found to be the main mechanism for removing concentrations from the liquid waste stream for the PhACs within the four STPs, while adsorption onto sludge appeared to be a minor process for all target PhACs except for triclosan. Some compounds (e.g. gemfibrozil) exhibited variable removal efficiencies within the four STPs. Plant D (10 lagoons in series) was least efficient in the removal of the target PhACs; significant biodegradation of these compounds only occurred from the sixth or seventh lagoon.

  2. Technologies for physical activity self-monitoring: a study of differences between users and non-users

    Science.gov (United States)

    Åkerberg, Anna; Söderlund, Anne; Lindén, Maria

    2017-01-01

    Background Different kinds of physical activity (PA) self-monitoring technologies are used today to monitor and motivate PA behavior change. The user focus is essential in the development process of this technology, including potential future users such as representatives from the group of non-users. There is also a need to study whether there are differences between the groups of users and non-users. The aims of this study were to investigate possible differences between users and non-users regarding their opinions about PA self-monitoring technologies and to investigate differences in demographic variables between the groups. Materials and methods Participants were randomly selected from seven municipalities in central Sweden. In total, 107 adults responded to the Physical Activity Products Questionnaire, which consisted of 22 questions. Results Significant differences between the users and non-users were shown for six of the 20 measurement-related items: measures accurately (p=0.007), measures with high precision (p=0.024), measures distance (p=0.020), measures speed (p=0.003), shows minutes of activity (p=0.004), and shows geographical position (p=0.000). Significant differences between the users and non-users were also found for two of the 29 encouragement items: measures accurately (p=0.001) and has long-term memory (p=0.019). Significant differences between the groups were also shown for level of education (p=0.030) and level of physical exercise (p=0.037). Conclusion With a few exceptions, the users and the non-users in this study had similar opinions about PA self-monitoring technologies. Because this study showed significant differences regarding level of education and level of physical exercise, these demographic variables seemed more relevant to investigate than differences in opinions about the PA self-monitoring technologies.

  3. NCL Disorders: Frequent Causes of Childhood Dementia

    Directory of Open Access Journals (Sweden)

    Alfried KOHLSCHÜTTER

    2013-01-01

    Full Text Available Dementia in children or young adults is most frequently caused by neuronal ceroidlipofuscinoses (NCL, a group of incurable lysosomal storage disorders linked by the accumulation of a characteristic intracellular storage material and progressive clinical deterioration, usually in combination with visual loss, epilepsy, and motor decline. The clinical characteristics can vary and the age at disease onset ranges from birth to over 30 years. Diagnosis of an NCL is difficult because of genetic heterogeneity with14 NCL forms (CLN1- CLN14 identified and a high phenotype variability. A new classification of the disorders is based on the affected gene and the age at disease onset and allows a precise and practicable delineation of every NCL disease. We present a clear diagnostic algorithm to identify each NCL form. A precise diagnosis is essential for genetic counseling of affected families and for optimizing palliative care. As patient management profits from recognizing characteristic complications, care supported by a specialized team of NCL clinicians is recommended. The development of curative therapies remains difficult as the underlying pathophysiological mechanism remains unclear for all NCL forms.

  4. Frequently asked questions in hypoxia research

    Directory of Open Access Journals (Sweden)

    Wenger RH

    2015-09-01

    Full Text Available Roland H Wenger,1,2 Vartan Kurtcuoglu,1,2 Carsten C Scholz,1,2 Hugo H Marti,3 David Hoogewijs1,2,4 1Institute of Physiology and Zurich Center for Human Physiology (ZIHP, University of Zurich, 2National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland; 3Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, 4Institute of Physiology, University of Duisburg-Essen, Essen, Germany Abstract: “What is the O2 concentration in a normoxic cell culture incubator?” This and other frequently asked questions in hypoxia research will be answered in this review. Our intention is to give a simple introduction to the physics of gases that would be helpful for newcomers to the field of hypoxia research. We will provide background knowledge about questions often asked, but without straightforward answers. What is O2 concentration, and what is O2 partial pressure? What is normoxia, and what is hypoxia? How much O2 is experienced by a cell residing in a culture dish in vitro vs in a tissue in vivo? By the way, the O2 concentration in a normoxic incubator is 18.6%, rather than 20.9% or 20%, as commonly stated in research publications. And this is strictly only valid for incubators at sea level. Keywords: gas laws, hypoxia-inducible factor, Krogh tissue cylinder, oxygen diffusion, partial pressure, tissue oxygen levels

  5. Most frequent calf diseases in industrial breeding

    Directory of Open Access Journals (Sweden)

    Lazić Sava

    2004-01-01

    Full Text Available It is possible to conduct an analysis of the incidence of viral diseases in calves if these diseases are divided into two basic groups. One group comprises diseases of respiratory organs which are manifested by symptoms of a respiratory syndrome, and the second group comprises diseases of digestive tract organs in the form of a gastrointestinal syndrome. It is considered that viruses have the dominant role in the complex etiology of the respiratory syndrome, primarily the IBR virus or the Bovine Herpes Virus-1 (BHV-1, followed by the parainfluenza 3 virus (RSV, the Bovine Viral Diahrrea Virus (BVDV, the bovine Respiratory Syncytial Virus (RSV, but also other viruses, such as adenoviruses, rhinoviruses, coronaviruses, can also influence the appearance of the respiratory syndrome. The respiratory syndrome is rarely caused by a single viral agent, but most frequently by mixed viruses, but also by bacterial infections. Mixed viral infections often have a lethal outcome. Investigations of the etiology of the gastrointestinal syndrome so far indicate that, in addition to bacteria, viruses can also be a significant etiological factor. Rotaviruses, coronaviruses, adenoviruses parvoviruses, herpesviruses (the IBR virus, pestiviruses (BVDV, can be the causes of a gastrointestinal syndrome. It is believed that viruses can be the cause in about 10% cases in the ethiopathogenesis of this syndrome. The paper describes the etiopathogenesis of calf diseases of viral etiology which are most often found in the local conditions of industrial breeding of calves.

  6. Technological Process and Equipment for Electric-local Softening Soil of Different Strength and Structure

    Directory of Open Access Journals (Sweden)

    Rizun, A.R.

    2014-09-01

    Full Text Available Electric-discharge technology for soil local softening is developed; the pre-production model of mobile high-energy electric-discharge generator with the controlled energy release is produced. Application of the proposed equipment and technology will allow essentially reduce construction materials and cost of the installation and construction works, in particular, capital investments in alternative energy, industrial, residential construction, and hydraulic engineering in general.

  7. Analysis of energy production with different photovoltaic technologies in the Colombian geography

    Science.gov (United States)

    Muñoz, Y.; Zafra, D.; Acevedo, V.; Ospino, A.

    2014-06-01

    This research has analyzed the photovoltaic technologies, Polycrystalline silicon, Monocrystalline Silicon, GIS, Cadmium Tellurium and Amorphous Silicon; in eight cities of the Colombian territory, in order to obtain a clear idea of what is the most appropriate for each city or region studied. PVsyst simulation software has been used to study in detail each photovoltaic technology, for an installed capacity of 100kW knowing the specific data of losses by temperature, mismatch, efficiency, wiring, angle inclination of the arrangement, among others

  8. Evaluation of Costs in Asparagus Production in Relation to Different Technological Processes in Conditions of Slovak Republic

    Directory of Open Access Journals (Sweden)

    Patrik Burg

    2014-01-01

    Full Text Available This study deals with analysis structure of cost on the production of asparagus in relation to three different technological processes in conditions of Slovak Republic. Obtained results can be used as a template to prepare budgets and make production decisions to estimate potential returns and to analyze investment and financial analysis decisions in the asparagus cultivation. Production practices used in the budget are based on typical practices for asparagus in this country. From the analysis of the cost structure of assessed variants different technological procedures follows that the largest share of the costs fall to purchased material and labor.

  9. Radiation visualization in virtual reality: A comparison of flat and topographic map types, presented on four different display technologies

    Energy Technology Data Exchange (ETDEWEB)

    Nystad, Espen; Sebok, Angelia

    2005-08-15

    HWR-734 describes an experiment performed to compare different types of VR display technologies and their effects on learning. In the study, two different ways of presenting radiation information were compared. One was a flat radiation map with different colours for different levels of radiation. The other was a topographic map, where radiation levels were distinguished both by colour and by the elevation of the map. The efficiency of the maps for learning radiation information, and subjective preferences was assessed. The results indicated that the maps were each suited for different kinds of use. It is recommended to follow up this study with further investigation of radiation map efficiency. (Author)

  10. MERGE-ETL: An Optimisation Equilibrium Model with Two Different Endogeneous Technological Learning Formulations

    Energy Technology Data Exchange (ETDEWEB)

    Bahn, O.; Kypreos, S.

    2002-07-01

    In MERGE-ETL, endogenous technological progress is applied to eight energy technologies: six power plants (integrated coal gasification with combined cycle, gas turbine with combined cycle, gas fuel cell, new nuclear designs, wind turbine and solar photovoltaic) and two plants producing hydrogen (from biomass and solar photovoltaic). Furthermore, compared to the original MERGE model, we have introduced two new power plants (using coal and gas) with CO{sub 2} capture and disposal into depleted oil and gas reservoirs. The difficulty with incorporating endogenous technological progress in MERGE comes from the resulting formulation of the MERGE-ETL model. Indeed, technological learning is related to increasing returns to adoption, and the mathematical formulation of MERGE-ETL corresponds then to a (non-linear and) non-convex optimisation problem. To solve MERGE-ETL, we have devised a three-step heuristic approach, where we search for the global optimum in an iterative way. We use in particular for this a linearisation, following mixed integer programming techniques, of the bottom-up part of MERGE-ETL. To study the impacts of modelling endogenous technological change in MERGE, we have considered several scenarios related to technological learning and carbon control. The latter corresponds to a 'soft landing' of world energy related CO{sub 2} emissions to a level of 10 Gt C by 2050, and takes into account the recent (2001) Marrakech Agreements for CO{sub 2} emission limits by 2010. Notice that our baseline scenario (without emission control and endogenous technological change) is consistent, in particular in terms of population and CO{sub 2} emissions, with the IPCC B2 scenario. Our numerical application with MERGE-ETL shows that technological learning yields an increase of primary energy use and of electricity generation. Indeed, energy production, and in particular electricity generation, become less expensive over-time. Energy (electricity, but also non

  11. Gender, Conjugalities and assisted reproductive technologies: regulatory aspects and practices in different scenarios

    Directory of Open Access Journals (Sweden)

    Luciane da Costa Moás

    2015-06-01

    Full Text Available The present article focuses on the construction of the reproductive practices in the access to assisted reproduction in which the conjugal sexuality, family dynamics and regulatory instances are intertwined. Considering the cultural and symbolic dimension inherent to the production of bodies, the identity processes in the contemporary scene pose challenges to the realization of the desire for children both under the heterosexual and homosexual conjugalities. Regulations and decision-making issues regarding the use of reproductive technologies are addressed, as well as the elements present in the marital dynamic involving the desire for a "natural" reproduction via assisted technologies. Prescriptive medical and legal parameters that do not match the experience of couples and individuals who turn to assisted reproductive technologies were found in this work.

  12. Ecological momentary assessment of urban adolescents' technology use and cravings for unhealthy snacks and drinks: differences by ethnicity and sex.

    Science.gov (United States)

    Borgogna, Nicholas; Lockhart, Ginger; Grenard, Jerry L; Barrett, Tyson; Shiffman, Saul; Reynolds, Kim D

    2015-05-01

    Adolescents' technology use is generally associated with food cravings, but it is not clear whether specific types of technology elicit particular types of cravings or whether personal characteristics play a role in these associations. We examined whether momentary associations between four technology types (ie, television, video games, computer messaging, and phone messaging) and cravings for unhealthy snack foods and sweetened drinks were moderated by youths' sex, ethnicity, body mass index, and age. Urban adolescents (N=158) aged 14 to 17 years provided momentary information about their technology use and food cravings during the course of 1 week and completed survey reports of their personal characteristics. We used multilevel modeling to determine momentary associations and interactions. Non-Hispanic adolescents showed stronger associations between television exposure and cravings for sweet snacks, salty snacks, and sweetened drinks. Being Hispanic was associated with stronger associations between phone messaging and cravings for sweet snacks, salty snacks, and sweetened drinks. Males showed stronger associations between video game use and salty snack cravings. As the public health field continues to monitor the effects of technology use on adolescents' eating and overall health, it will be important to determine the extent to which these groups are differentially affected by different forms of technology. Copyright © 2015 Academy of Nutrition and Dietetics. Published by Elsevier Inc. All rights reserved.

  13. A group decision-making tool for the application of membrane technologies in different water reuse scenarios.

    Science.gov (United States)

    Sadr, S M K; Saroj, D P; Kouchaki, S; Ilemobade, A A; Ouki, S K

    2015-06-01

    A global challenge of increasing concern is diminishing fresh water resources. A growing practice in many communities to supplement diminishing fresh water availability has been the reuse of water. Novel methods of treating polluted waters, such as membrane assisted technologies, have recently been developed and successfully implemented in many places. Given the diversity of membrane assisted technologies available, the current challenge is how to select a reliable alternative among numerous technologies for appropriate water reuse. In this research, a fuzzy logic based multi-criteria, group decision making tool has been developed. This tool has been employed in the selection of appropriate membrane treatment technologies for several non-potable and potable reuse scenarios. Robust criteria, covering technical, environmental, economic and socio-cultural aspects, were selected, while 10 different membrane assisted technologies were assessed in the tool. The results show this approach capable of facilitating systematic and rigorous analysis in the comparison and selection of membrane assisted technologies for advanced wastewater treatment and reuse.

  14. The Differences in Career-Related Variables between Temporary and Permanent Employees in Information Technology Companies in Korea

    Science.gov (United States)

    Tak, Jinkook; Lim, Beomsik

    2008-01-01

    The purpose of this study was to examine differences in career-related variables, such as career commitment and career satisfaction, based on employment status (temporary vs. permanent employees) and job type (professional vs. nonprofessional employees). With a sample of 302 employees working in information technology companies in Korea, it was…

  15. Effects of Different Multimedia Presentations on Viewers' Information-Processing Activities Measured by Eye-Tracking Technology

    Science.gov (United States)

    Chuang, Hsueh-Hua; Liu, Han-Chin

    2012-01-01

    This study implemented eye-tracking technology to understand the impact of different multimedia instructional materials, i.e., five successive pages versus a single page with the same amount of information, on information-processing activities in 21 non-science-major college students. The findings showed that students demonstrated the same number…

  16. The Effect of the Use of Assistive Technology on English Reading Comprehension of Students with Learning Differences

    Science.gov (United States)

    Caraballo, Gladys

    2012-01-01

    The purpose of this study was to find the effect of the use of assistive technology (CD ROM Interactive Liquid Books, the Interactive White Board, and Interactive Signed Stories) on English reading comprehension of students with learning differences, specifically with deaf and learning disabled students. The research questions that provided the…

  17. Differences between the Sexes among Protestant Christian Middle School Students and Their Attitudes toward Science, Technology, Engineering and Math (STEM)

    Science.gov (United States)

    Michael, Kurt Y.; Alsup, Philip R.

    2016-01-01

    Research focusing on science, technology, engineering, and math (STEM) education among conservative Protestant Christian school students is scarce. Crenshaw's intersectionality theory is examined as it pertains to religion as a group identifier. The STEM Semantic Survey was completed by 157 middle school students attending six different private…

  18. Differences in Access to Information and Communication Technologies: Voices of British Muslim Teenage Girls at Islamic Faith Schools

    Science.gov (United States)

    Hardaker, Glenn; Sabki, Aishah; Qazi, Atika; Iqbal, Javed

    2017-01-01

    Purpose: Most research on information and communication technologies (ICT) differences has been related to gender and ethnicity, and to a lesser extent religious affiliation. The purpose of this paper is to contribute to this field of research by situating the discussion in the context of British Muslims and extending current research into ICT…

  19. Three Metacognitive Approaches to Training Pre-Service Teachers in Different Learning Phases of Technological Pedagogical Content Knowledge

    Science.gov (United States)

    Kramarski, Bracha; Michalsky, Tova

    2009-01-01

    Our study investigated 3 metacognitive approaches provided during different phases of learning technological pedagogical content knowledge (TPCK) in a Web-based learning environment. These metacognitive approaches were based on self-question prompts (Kramarski & Mevarech, 2003) which appeared in pop-up screens and fostered the Self-Regulated…

  20. Student Perceptions of Chemistry Experiments with Different Technological Interfaces: A Comparative Study

    Science.gov (United States)

    Priest, Samuel J.; Pyke, Simon M.; Williamson, Natalie M.

    2014-01-01

    Microcomputer based laboratory activities have been suggested to have a number of benefits in science education. However, their implementation produces mixed results, and student perception data have in the past yielded responses that are negative regarding the technology. This work presents a case study of three first year undergraduate chemistry…

  1. Gender Differences in the Field of Information Security Technology Management: A Qualitative, Phenomenological Study

    Science.gov (United States)

    Johnson, Marcia L.

    2013-01-01

    This qualitative study explored why there are so few senior women in the information security technology management field and whether gender played a part in the achievement of women in the field. Extensive interviews were performed to capture the lived experiences of successful women in the field regarding the obstacles and common denominators of…

  2. Examining Differences in Psychological Adjustment Problems among Children Conceived by Assisted Reproductive Technologies

    Science.gov (United States)

    Shelton, Katherine H.; Boivin, Jacky; Hay, Dale; van den Bree, Marianne B. M.; Rice, Frances J.; Harold, Gordon T.; Thapar, Anita

    2009-01-01

    The aim of this study was to examine whether there was variation in levels of psychological adjustment among children conceived through Assisted Reproductive Technologies using the parents' gametes (homologous), sperm donation, egg donation, embryo donation and surrogacy. Information was provided by parents about the psychological functioning of…

  3. Gender Differences in the Field of Information Security Technology Management: A Qualitative, Phenomenological Study

    Science.gov (United States)

    Johnson, Marcia L.

    2013-01-01

    This qualitative study explored why there are so few senior women in the information security technology management field and whether gender played a part in the achievement of women in the field. Extensive interviews were performed to capture the lived experiences of successful women in the field regarding the obstacles and common denominators of…

  4. Technology Use in Nursery and Primary Education in Two Different Settings

    Science.gov (United States)

    Bueno Alastuey, Mª Camino; García Laborda, Jesús

    2016-01-01

    This article studies which and how Information and Communications Technologies (ICTs) are used by nursery and primary education in-service teachers as reported by their pre-service teacher trainees after observations in their practicum in two provinces in Spain, Alcalá de Henares-Guadalajara and Navarre. Results indicate that in-service teachers…

  5. Examining Social Studies and Science and Technology Preservice Teachers' Epistemological Beliefs Regarding Different Variables

    Science.gov (United States)

    Topkaya, Yavuz

    2015-01-01

    The purpose of this study is to determine epistemological beliefs of pre-service teachers who attend social studies and science and technology teaching programs; and to investigate how these beliefs varies regarding grade level, gender and departments. The sample of the study is composed of 300 social studies, 260 science and technology…

  6. Effects of frequent announced parasitology quizzes on the academic achievement.

    Directory of Open Access Journals (Sweden)

    Ghasem Zamini

    2013-12-01

    Full Text Available The effect of frequent examinations on the students' learning has had inconsistent results. This study aimed to assess the effectiveness of frequent announced quizzes on the learning of a representative sample of Iranian medical students.This experimental study was conducted among 37 fifth semester medical students who had taken the course in Protozoology and Helminthology, in which the same basic information were provided about different types of protozoa and worms. Initially, in the teaching of helminthology, ten routine sessions were handled with lectures and interactive questions and answers. Then at the beginning of the protozoology topic in the beginning of all of the next 9 sessions, the students were informed that they will have a quiz at the end of each session. At the end of the semester, the total scores of quizzes were compared with the mean final scores of protozoology and helminthology using paired t and repeated measure tests.The mean final scores of the protozoology lesson were not significantly different from that of the helminthology (10.45 ± 2.75 vs.11.25 ± 2.56 on the scale of 20, respectively, P=0.13. There was no significant difference in the mean score of the five quizzes compared with the mean final term score of protozoology. The overall mean scores in the helminthology lesson (11.25±2.56, protozoology lesson (10.45±2.75, and the quizzes (9.16 ± 3.55 were significantly different (P <0.0001.Frequent announced quizzes were not effective on increasing the medical students' motivation and learning.

  7. Handling Dynamic Weights in Weighted Frequent Pattern Mining

    Science.gov (United States)

    Ahmed, Chowdhury Farhan; Tanbeer, Syed Khairuzzaman; Jeong, Byeong-Soo; Lee, Young-Koo

    Even though weighted frequent pattern (WFP) mining is more effective than traditional frequent pattern mining because it can consider different semantic significances (weights) of items, existing WFP algorithms assume that each item has a fixed weight. But in real world scenarios, the weight (price or significance) of an item can vary with time. Reflecting these changes in item weight is necessary in several mining applications, such as retail market data analysis and web click stream analysis. In this paper, we introduce the concept of a dynamic weight for each item, and propose an algorithm, DWFPM (dynamic weighted frequent pattern mining), that makes use of this concept. Our algorithm can address situations where the weight (price or significance) of an item varies dynamically. It exploits a pattern growth mining technique to avoid the level-wise candidate set generation-and-test methodology. Furthermore, it requires only one database scan, so it is eligible for use in stream data mining. An extensive performance analysis shows that our algorithm is efficient and scalable for WFP mining using dynamic weights.

  8. Bayes and Frequentism: a particle physicist's perspective

    Science.gov (United States)

    Lyons, Louis

    2013-02-01

    In almost every scientific field, an experiment involves collecting data and then analysing it. The analysis stage will often consist in trying to extract some physical parameter and estimating its uncertainty; this is known as Parameter Determination. An example would be the determination of the mass of the top quark, from data collected from high energy proton-proton collisions. A different aim is to choose between two possible hypotheses. For example, are data on the recession speed s of distant galaxies proportional to their distance d, or do they fit better to a model where the expansion of the Universe is accelerating? There are two fundamental approaches to such statistical analyses - Bayesian and Frequentist. This article discusses the way they differ in their approach to probability, and then goes on to consider how this affects the way they deal with Parameter Determination and Hypothesis Testing. The examples are taken from everyday life and from Particle Physics.

  9. Bayes and Frequentism: a Particle Physicist's perspective

    CERN Document Server

    Lyons, Louis

    2013-01-01

    In almost every scientific field, an experiment involves collecting data and then analysing it. The analysis stage will often consist in trying to extract some physical parameter and estimating its uncertainty; this is known as Parameter Determination. An example would be the determination of the mass of the top quark, from data collected from high energy proton-proton collisions. A different aim is to choose between two possible hypotheses. For example, are data on the recession speed s of distant galaxies proportional to their distance d, or do they fit better to a model where the expansion of the Universe is accelerating? There are two fundamental approaches to such statistical analyses - Bayesian and Frequentist. This article discusses the way they differ in their approach to probability, and then goes on to consider how this affects the way they deal with Parameter Determination and Hypothesis Testing. The examples are taken from every-day life and from Particle Physics.

  10. Manufacturing technology of AS-SOFC prepared with different commercially available precursors

    Directory of Open Access Journals (Sweden)

    Kawalec M.

    2016-01-01

    Full Text Available Fuel cells are devices converting the chemical energy into the electrical energy and heat as result of the electrochemical reaction between gaseous fuel and a gas oxidant in flameless combustion process. Because of omission of thermo-mechanical steps that are present in any traditional energy conversion technology (e.g. gas turbine fuel cells show increased efficiency in comparison. Compact sizes and modular scalability predestines this technology for distributed energy generation including but not limited to renewable energy sources (e.g. wind, solar. Fuel cells technology also addresses other very important part of distributed renewable energy generation. Because of the unreliable energy production rates and the usual for renewable energy sources mismatch between energy supply and demand, some sort of energy storage is needed to store surplus of produced energy and release it when needed. Reversible fuel cells, that generate hydrogen from available surplus of energy and then generate energy from that stored fuel when needed are cheaper and more ecologically friendly alternative to usually used batteries. This technology is still under development, including research at IEn OC CEREL. In the early development of reversible fuel cells, new types of nickel oxide and porosity forming carbon was evaluated for this task. This work compares the electrical and mechanical parameters of SOFC manufactured with JT Backer NiO and Carbon Polska carbon with cells made from other commercially available materials. Based on evaluated quality, purity, availability and cost, following materials were selected for comparison: Novamet NiO, 99,9 % pure, grain size 1-2 µm and Aldrich carbon with parameters similar to graphite used previously. Preliminary tests show clear changes in the microstructural, mechanical and electrical parameters.

  11. Carbon Footprint Analyses of Mainstream Wastewater Treatment Technologies under Different Sludge Treatment Scenarios in China

    OpenAIRE

    Chunyan Chai; Dawei Zhang; Yanling Yu; Yujie Feng; Man Sing Wong

    2015-01-01

    With rapid urbanization and infrastructure investment, wastewater treatment plants (WWTPs) in Chinese cities are putting increased pressure on energy consumption and exacerbating greenhouse gas (GHG) emissions. A carbon footprint is provided as a tool to quantify the life cycle GHG emissions and identify opportunities to reduce climate change impacts. This study examined three mainstream wastewater treatment technologies: Anaerobic–Anoxic–Oxic (A–A–O), Sequencing Batch Reactor (SBR) and Oxy...

  12. FOOD SCIENCE AND TECHNOLOGY ACROSS EUROPE 15. SCIENTIFIC KNOWLEDGE BASE AND DIFFERENCES IN QUALITY

    OpenAIRE

    Acosta, Manuel; Coronado, Daniel; FERRANDIZ, Esther; LEON, Dolores; Moreno, Pedro

    2015-01-01

    This paper contributes with some insights into scientific knowledge base in food industry at the regional level in Europe 15. We argue that science production by universities is not enough to create a scientific knowledge base. An additional requirement is counting on some standards of quality for being useful to firms. We explore this line of inquiry by first examining the regional distribution of food science across Europe and its relationship with the production of technology in the Europe...

  13. Gender difference towards information and communication technology awareness in Indian universities.

    Science.gov (United States)

    Verma, Chaman; Dahiya, Sanjay

    2016-01-01

    Nowadays, information and communication technology is major backbone of Indian education system. To support E-learning in Universities, information and communication technology (ICT) plays a momentous job. Several experts discussed about ICT awareness among students, teachers, and research scholars to take it into their learning and teaching methodology. Many of Universities either government or private are supporting the utilization of various ICT tools in teaching and learning practice. There is wide need to determine educator's behaviour towards ICT adoption to promote and enhance their learning skills. Students and faculty must confess that ICT awareness is key rod to access the technological services. This paper focuses on ICT awareness among students and faculty residing in Indian Universities. The concerned paper is describing the attitude of students and faculty towards ICT awareness in relation to their gender using statistical tools. More than nine hundred samples have been gathered from six Indian universities. The findings of this paper will help to Indian Universities administration to get aware about current scenario of ICT involvement in education system therein.

  14. Detecting suspicious objects along frequently used itineraries

    Science.gov (United States)

    Monnin, David; Schneider, Armin L.; Bieber, Etienne

    2010-10-01

    Improvised explosive devices (IEDs), one of today's major threats that armed forces have to cope with, are particularly menacing during field operations in which the same itinerary is used by troops on a regular basis. The detection of changes observed on an itinerary between different passages of a vehicle can be very revealing. We propose a low-cost solution implementing a GPS receiver, a three-axis magnetic compass as well as a video camera. This device, together with an image processing and computer vision scheme, allow the occupants of a vehicle to focus their attention on any visible changes occurring along their itinerary since a previous passage.

  15. A triangular fuzzy TOPSIS-based approach for the application of water technologies in different emergency water supply scenarios.

    Science.gov (United States)

    Qu, Jianhua; Meng, Xianlin; Yu, Huan; You, Hong

    2016-09-01

    Because of the increasing frequency and intensity of unexpected natural disasters, providing safe drinking water for the affected population following a disaster has become a global challenge of growing concern. An onsite water supply technology that is portable, mobile, or modular is a more suitable and sustainable solution for the victims than transporting bottled water. In recent years, various water techniques, such as membrane-assisted technologies, have been proposed and successfully implemented in many places. Given the diversity of techniques available, the current challenge is how to scientifically identify the optimum options for different disaster scenarios. Hence, a fuzzy triangular-based multi-criteria, group decision-making tool was developed in this research. The approach was then applied to the selection of the most appropriate water technologies corresponding to the different emergency water supply scenarios. The results show this tool capable of facilitating scientific analysis in the evaluation and selection of emergency water technologies for enduring security drinking water supply in disaster relief.

  16. Who 'fits' the science and technology profile? Personality differences in secondary education

    NARCIS (Netherlands)

    Korpershoek, Hanke; Kuyper, Hans; van der Werf, Greetje; Bosker, Roe; Van der Werf, M.P.C.

    2010-01-01

    The present study explores the relationship between personality characteristics and students' subject choice in secondary education and addresses the question: Are there differences in personality characteristics among students choosing different school subjects?' The research included 3992 9th

  17. Who 'fits' the science and technology profile? Personality differences in secondary education

    NARCIS (Netherlands)

    Korpershoek, Hanke; Kuyper, Hans; van der Werf, Greetje; Bosker, Roe; Van der Werf, M.P.C.

    2010-01-01

    The present study explores the relationship between personality characteristics and students' subject choice in secondary education and addresses the question: Are there differences in personality characteristics among students choosing different school subjects?' The research included 3992 9th grad

  18. Gender differences in technology acceptance in selected South African companies: Implications for electronic learning

    Directory of Open Access Journals (Sweden)

    Willie T. Chinyamurindi

    2010-03-01

    Full Text Available Orientation: Technology enhanced training is becoming popular as a means for the training of soft skills, especially in work-related environments. Men and women who use this type of training encounter some challenges with regard to their usage.Research: The objective of this study was to investigate trainees’ acceptance of electronic coursework as an instruction and learning technique in various industries in the South African context.Motivation for the study: A persistent gender imbalance in the South African work-place has been noted to exist chiefly in the Science, Engineering and Technology (SET sectors, areas that have an important bearing on South Africa’s global competitiveness. This study explores how gender imbalance manifests in terms of trainee acceptance of electronic coursework.Research design, approach and method: A cross-sectional survey design was used. A survey was conducted amongst 191 employees in the SET sector. The measuring instrument used was the Technology Acceptance Instrument (TAI and included measures of Computer Self-Efficacy (CSE, Perceived Ease of Use (PEU, Perceived Usefulness (PU and Behavioural Intention to Use (BI.Main findings: Women ratings of the TAI to use the electronic coursework were slightly higher than men’s ratings. Multiple regression analyses were also carried out to measure the variation in the level of influence with gender as a predictor variable. The results showed that compared to women, men had a lower salient effect of elements of the TAI, notably, CSE–PU; PU–BI and BI–PEU. However, compared to men, women had a higher salient effect in terms of the relationship between CSE–PU and PU–PEU.Practical implications: The implication of the results is that interventions that focus on the human resources development of employees using electronic coursework (namely, CSE, PEU, PU and BI are worth considering as they influence the acceptance of the interventions.Contribution/value-add: The

  19. A single lysis solution for the analysis of tissue samples by different proteomic technologies

    DEFF Research Database (Denmark)

    Gromov, P.; Celis, J.E.; Gromova, I.

    2008-01-01

    Cancer, being a major healthcare concern worldwide, is one of the main targets for the application of emerging proteomic technologies and these tools promise to revolutionize the way cancer will be diagnosed and treated in the near future. Today, as a result of the unprecedented advances that have...... dissease, is driving scientists to increasingly use clinically relevant samples for biomarker and target discovery. Tissues are heterogeneous and as a result optimization of sample preparation is critical for generating accurate, representative, and highly reproducible quantitative data. Although a large...

  20. Influence of different surfactants on the technological properties and in vivo ocular tolerability of lipid nanoparticles.

    Science.gov (United States)

    Leonardi, Antonio; Bucolo, Claudio; Romano, Giovanni Luca; Platania, Chiara Bianca Maria; Drago, Filippo; Puglisi, Giovanni; Pignatello, Rosario

    2014-08-15

    Addition of one or more surfactant agents is often necessary for the production of nanostructured lipid and polymeric systems. The removal of residual surfactants is a required step for technological and toxicological reasons, especially for peculiar applications, such as the ophthalmic field. This study was planned to assess the technological properties of some surfactants, commonly used for the production of lipid nanoparticles, as well as their ocular safety profile. Stable and small-size solid lipid nanoparticles were obtained using Dynasan(®) 114 as the lipid matrix and all the tested surfactants. However, from a toxicological point of view, the nanocarriers produced using Kolliphor(®) P188 were the most valuable, showing no irritant effect on the ocular surface up to the highest tested surfactant concentration (0.4%, w/v). The SLN produced using Cremophor(®) A25 and Lipoid(®) S100 were tolerated up to a surfactant concentration of 0.2% by weight, while for Tween(®) 80 and Kolliphor(®) HS 15 a maximum concentration of 0.05% can be considered totally not-irritant.

  1. A Range-Based Vehicle Life Cycle Assessment Incorporating Variability in the Environmental Assessment of Different Vehicle Technologies and Fuels

    OpenAIRE

    2014-01-01

    How to compare the environmental performance of different vehicle technologies? Vehicles with lower tailpipe emissions are perceived as cleaner. However, does it make sense to look only to tailpipe emissions? Limiting the comparison only to these emissions denies the fact that there are emissions involved during the production of a fuel and this approach gives too much advantage to zero-tailpipe vehicles like battery electric vehicles (BEV) and fuel cell electric vehicle (FCEV). Would it be ...

  2. Fast Discovering Frequent Patterns for Incremental XML Queries

    Institute of Scientific and Technical Information of China (English)

    PENG Dun-lu; QIU Yang

    2004-01-01

    It is nontrivial to maintain such discovered frequent query patterns in real XML-DBMS because the transaction database of queries may allow frequent updates and such updates may not only invalidate some existing frequent query patterns but also generate some new frequent query patterns.In this paper, two incremental updating algorithms, FUXQMiner and FUFXQMiner, are proposed for efficient maintenance of discovered frequent query patterns and generation the new frequent query patterns when new XML queries are added into the database.Experimental results from our implementation show that the proposed algorithms have good performance.

  3. The discussion of different varieties of remote sensing images' frequent applying and essentials of processing in the forestry's daily work%浅谈林业工作中常用的遥感影像及处理要点

    Institute of Scientific and Technical Information of China (English)

    骆钦锋

    2012-01-01

    在遥感影像定义的基础之上,讨论了遥感影像的四个基本特征。对林业工作中常用的中分辨率遥感影像Landsate TM5、中巴资源卫星以及常用的高分辨率遥感影像Spot5、Rapideye、Alos、QuickBird、WorldviewⅠ、WorldviewⅡ等进行了介绍并做了对比分析,总结各种遥感影像的优缺点;并讨论了遥感影像基础数据准备,DOM与DEM参考数据准备以及的遥感影像正射纠正,并以ALOS为例,对算法及图像增强等工作进行了探讨。%According to the definition of remote sensing images (RSI) , four basic characteristics have been disscussed. Mid-resolution varieties of RSI that include Landsate TM5 and CBERS, and high-resolution varieties of RSI that include SpotS, Rapideye, Alos, QuickBird, Worldview I , Worldview II etc.,which have been introduced and frequently applied in inspection work of forestry. This article concluded merits and drawbacks of different varieties of RSI via comparing and analyzing based on mid-resolution and high-resolution varieties of RSI. Meanwhile, basic data's preparation of RSI, DOM and DEM, ortho-rectification.of RSI have been discussed. At last, taking Alos as a case, discussion and research of RSI's processing, enhancement and algorithm have been done as well.

  4. Biological remediation of petroleum hydrocarbons from a refinery's soil : comparison of different technologies

    Energy Technology Data Exchange (ETDEWEB)

    Nazare Couto, M.; Vasconcelos, T.S.D. [CIMAR/CIIMAR, Porto (Portugal)

    2007-07-01

    This presentation discussed bioremediation methods used at a refinery in Portugal with a high distillation capacity. The aim of the project was to develop a method for restoring contaminated sites using rhizoremediation and bio-augmentation. Hydrocarbon molecules were tightly sorbed to the soil particles at the refinery. Plants used in the bioremediation project included Scirpus maritimus and Juncus maritimus, as well as Cortoaderia selloana taken from an estuary near the refinery. Tests were conducted both with, and without the use of microorganisms. Commercial bio-augmentation products were used. Plant growth was evaluated for a period of 64 days. It was concluded that the technology is cheaper than many traditional methods of treating hydrocarbon-contaminated soils. tabs., figs.

  5. INFLUENCE OF DIFFERENT FOOD ADDITIVES AND INGREDIENTS ON THE TECHNOLOGICAL CHARACTERISTICS OF ANIMAL PROTEINS

    Directory of Open Access Journals (Sweden)

    N. A. Drozdova

    2016-01-01

    Full Text Available In the present review, we focus on the features of the collagen structure. In particular, we report the correlation between the amount of proline and hydroxyproline and the temperature of denaturation, as well as the changes of collagen structure after thermal treatment. After cooling, denaturated collagen forms dense jellies which may absorb a large amount of water. The influence of pH on the denaturalion temperature, solubility andthe strength characteristics of collagen-containing proteins are described. The review also describes the data on the influence of various food additives and chemicals (acids, alkalis, salts i.a. phosphates, hydrocolloids on the collagen protein structure and technological properties. The effect of acids, alkalis, salts on the properties of collagen dependson the nature and strength of the ions and their affinity for the collagen ions. The interactions between the collagen proteins and hydrocolloids result in the synergetic effect. Phosphates and collagen form solid structures.

  6. Inulin-type fructans: a review on different aspects of biochemical and pharmaceutical technology.

    Science.gov (United States)

    Apolinário, Alexsandra Conceição; de Lima Damasceno, Bolívar Ponciano Goulart; de Macêdo Beltrão, Napoleão Esberard; Pessoa, Adalberto; Converti, Attilio; da Silva, José Alexsandro

    2014-01-30

    Inulin is a natural storage polysaccharide with a large variety of food and pharmaceutical applications. It is widely distributed in plants, being present as storage carbohydrate in more than 30,000 vegetable products. Due to their wide distribution in nature and significant role in industry, the extraction, isolation and characterization of inulin-type fructans are gaining attention in recent years. Inulin sources have recently received increasing interest as they are a renewable raw material for the production of bioethanol, fructose syrup, single-cell protein and single cell oil, obtainment of fructooligosaccharides and other useful products. This review focuses on the state-of-the-art of biochemical and pharmaceutical technology of inulin-type fructans.

  7. Technology use and interest among low-income parents of young children: differences by age group and ethnicity.

    Science.gov (United States)

    Swindle, Taren M; Ward, Wendy L; Whiteside-Mansell, Leanne; Bokony, Patti; Pettit, Dawn

    2014-01-01

    To examine demographic differences in frequency of use of technologies and interest in receiving nutrition information via technology by low-income parents and caregivers. Descriptive, cross-sectional study. Head Start and state-funded child care programs. A total of 806 parents and caregivers from low-income families. A 20-item survey assessed frequency of use and interest in technologies (dependent variables) and collected participant age and ethnicity (independent variables). Multivariate ANOVA analysis investigated whether age, ethnicity, and their interactions were related to frequency of use and interest in technology types. Daily rates of usage for Internet, text messaging, and cell phone use were over 60%. However, Twitter and blogs were accessed daily by effects for ethnicity (Wilks' λ = .85; F = 3.13; P < .001) and age (Wilks' λ = .89; F = 2.29; P < .001) were observed. Facebook, e-mail, texting, and smartphone applications may be innovative modalities to engage with low-income parents and caregivers aged ≤ 45. However, some strategies may be ineffective for reaching Hispanic families as they reported less use of the Internet, Facebook, and e-mail as well as less interest in e-mail. Published by Elsevier Inc.

  8. Society for Assisted Reproductive Technology

    Science.gov (United States)

    The Society for Assisted Reproductive Technology PATIENTS Patient Information What Is SART? Risks of IVF Third Party Reproduction A Patient's Guide to Assisted Reproductive Technology Frequently Asked ...

  9. A Range-Based Vehicle Life Cycle Assessment Incorporating Variability in the Environmental Assessment of Different Vehicle Technologies and Fuels

    Directory of Open Access Journals (Sweden)

    Maarten Messagie

    2014-03-01

    Full Text Available How to compare the environmental performance of different vehicle technologies? Vehicles with lower tailpipe emissions are perceived as cleaner. However, does it make sense to look only to tailpipe emissions? Limiting the comparison only to these emissions denies the fact that there are emissions involved during the production of a fuel and this approach gives too much advantage to zero-tailpipe vehicles like battery electric vehicles (BEV and fuel cell electric vehicle (FCEV. Would it be enough to combine fuel production and tailpipe emissions? Especially when comparing the environmental performance of alternative vehicle technologies, the emissions during production of the specific components and their appropriate end-of-life treatment processes should also be taken into account. Therefore, the complete life cycle of the vehicle should be included in order to avoid problem shifting from one life stage to another. In this article, a full life cycle assessment (LCA of petrol, diesel, fuel cell electric (FCEV, compressed natural gas (CNG, liquefied petroleum gas (LPG, hybrid electric, battery electric (BEV, bio-diesel and bio-ethanol vehicles has been performed. The aim of the manuscript is to investigate the impact of the different vehicle technologies on the environment and to develop a range-based modeling system that enables a more robust interpretation of the LCA results for a group of vehicles. Results are shown for climate change, respiratory effects, acidification and mineral extraction damage of the different vehicle technologies. A broad range of results is obtained due to the variability within the car market. It is concluded that it is essential to take into account the influence of all the vehicle parameters on the LCA results.

  10. The Moderating Effect of Frequent Singing on Voice Aging.

    Science.gov (United States)

    Lortie, Catherine L; Rivard, Julie; Thibeault, Mélanie; Tremblay, Pascale

    2017-01-01

    The effects of aging on voice production are well documented, including changes in loudness, pitch, and voice quality. However, one important and clinically relevant question that remains concerns the possibility that the aging of voice can be prevented or at least delayed through noninvasive methods. Indeed, discovering natural means to preserve the integrity of the human voice throughout aging could have a major impact on the quality of life of elderly adults. The objective of this study was therefore to examine the potentially positive effect of singing on voice production. To this aim, a group of 72 healthy nonsmoking adults (20-93 years old) was recruited and separated into three groups based on their singing habits. Several voice parameters were assessed (fundamental frequency [f0] mean, f0 standard deviation [SD], f0 minimum and f0 maximum, mean amplitude and amplitude SD, jitter, shimmer, and harmonic-to-noise ratio) during the sustained production of vowel /a/. Other parameters were assessed during standardized reading passage (speaking f0, speaking f0 SD). As was expected, age effects were found on most acoustic parameters with significant sex differences. Importantly, moderation analyses revealed that frequent singing moderates the effect of aging on most acoustic parameters. Specifically, in frequent singers, there was no decrease in the stability of pitch and amplitude with age, suggesting that the voice of frequent singers remains more stable in aging than the voice of non-singers, and more generally, providing empirical evidence for a positive effect of singing on voice in aging. Copyright © 2017 The Voice Foundation. Published by Elsevier Inc. All rights reserved.

  11. Mining φ-Frequent Itemset Using FP-Tree

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The problem of association rule mining has gained considerableprominence in the data mining community for its use as an important tool of knowledge discovery from large-scale databases. And there has been a spurt of research activities around this problem. However, traditional association rule mining may often derive many rules in which people are uninterested. This paper reports a generalization of association rule mining called φ-association rule mining. It allows people to have different interests on different itemsets that are the need of real application. Also, it can help to derive interesting rules and substantially reduce the amount of rules. An algorithm based on FP-tree for mining φ-frequent itemset is presented. It is shown by experiments that the proposed method is efficient and scalable over large databases.

  12. Influence of Frequent Nocturnal Home Hemodialysis on Food Preference

    NARCIS (Netherlands)

    Ipema, Karin; Franssen, Casper; van der Schans, Cees; Smit, Lianne; Noordman, Sabine; Haisma, Hinke

    Objective: Dialysis patients frequently report a change of taste that is reversible after renal transplantation, suggesting that uremic toxins may negatively influence taste. Currently, frequent nocturnal home hemodialysis (NHHD) is the most effective method of hemodialysis, and is associated with

  13. Evaluation of the technological and sensory properties of durum wheat spaghetti enriched with different dietary fibres.

    Science.gov (United States)

    Rakhesh, Nisha; Fellows, Christopher M; Sissons, Mike

    2015-01-01

    The incorporation of fibres, whether insoluble or soluble, in durum wheat pasta negatively impacts desirable end-use properties, especially if incorporated in significant amounts. Fibres can disrupt the starch-protein matrix of the dough during pasta preparation and can also often swell more readily with water than starch, competing with the starch for water during dough development. Similar degrees of substitution with different fibres gave markedly different impacts on firmness, stickiness, cooking loss and sensory attributes, suggesting that results obtained for one fibre cannot readily be generalized to other fibres. The in vitro starch digestibility of the pastas was significantly reduced when resistant starch, β-glucan-enriched flour, carboxymethyl cellulose or guar gum was incorporated but increased when pollard or inulin was added. In many instances, different sources of the same fibre gave dramatically different impacts on the properties of cooked durum wheat pasta.

  14. Influence of frequent nocturnal home hemodialysis on food preference.

    Science.gov (United States)

    Ipema, Karin; Franssen, Casper; van der Schans, Cees; Smit, Lianne; Noordman, Sabine; Haisma, Hinke

    2010-03-01

    Dialysis patients frequently report a change of taste that is reversible after renal transplantation, suggesting that uremic toxins may negatively influence taste. Currently, frequent nocturnal home hemodialysis (NHHD) is the most effective method of hemodialysis, and is associated with the lowest levels of uremic toxins. We studied preferences for various foods as an indicator of taste perception. We questioned whether food preference differs between NHHD patients and those on conventional hemodialysis. In this transverse, cross-sectional pilot study, we assessed food preference by means of a questionnaire for patients on NHHD (n=6; 8 hours of dialysis per night, for 5 or 6 nights a week) and 3 age-matched and sex-matched control groups: chronic home hemodialysis patients (HHD; n=9; 4 to 5 hours of dialysis per day, 3 days a week), chronic in-center hemodialysis patients (CHD; n=18; 4 to 5 hours of dialysis per day, 3 days a week), and healthy control subjects (HC; n=23). Mean scores for food preference did not differ between groups (P=.32). Similarly, the preference for product groups did not differ between groups. On an individual product level, we found only minor differences. The NHHD patients had a preference for savory snacks, as did the HC and CHD groups, whereas the HHD group had a preference for sweet snacks (P food preference. The change in taste reported by NHHD patients is not related to their particular food preferences. Copyright (c) 2010 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.

  15. Germinated barley as a functional ingredient in chicken sausages: effect on physicochemical and technological properties at different levels.

    Science.gov (United States)

    Kim, Hyun-Wook; Hwang, Ko-Eun; Song, Dong-Heon; Kim, Yong-Jae; Ham, Youn-Kyung; Jeong, Tae-Jun; Choi, Yun-Sang; Kim, Cheon-Jei

    2016-01-01

    The objective of this study was to evaluate the effect of germinated barley (GB) levels on physicochemical and technological properties of cooked chicken sausages. The chicken sausages were formulated with 0-4 % GB. Addition of GB increased pH and yellowness but decreased lightness of the cooked chicken sausages. However, there was no difference in redness among treatments (P > 0.05). Based on the positive effects of GB on measurements related to water and/or fat retention ability, such as emulsion stability, cooking loss, and thawing loss, such results depended upon the added amount of GB. In addition, apparent viscosity increased with increasing levels of GB, resulting in hardness, springiness, and chewiness (P fiber, β-glucan, and starch. Therefore, our results suggests that GB could be a functional ingredient to improve physicochemical and technological properties of chicken sausages and optimal level of GB was determined as minimum 2 %.

  16. An empirical study on different factors influencing information technology adoption for auditing purposes: A case study of a banking organization

    Directory of Open Access Journals (Sweden)

    Mehdi Taghavi

    2013-04-01

    Full Text Available In this survey, we have investigated whether an easy and comprehensive information technology (IT infrastructure could contribute on auditing system in Iranian business society. The survey designs and distributes a questionnaire based on technology adoption method (TAM among employees of bank Melli Iran who participated in our survey in Likert scale and using t-student and Kruskal-Wallis test examined different hypotheses. The results of our survey have indicated that there was a relationship between a good perception in usefulness of IT implementation and accepting recent advances of IT and auditors with good perception on IT are able to take advantage of recent advances of IT in their auditing skills. In addition, our survey has concluded that ease of IT implementation could create motivation among auditors to automate their traditional skills. While educational background played an important role on our survey, age and job experience did not have any impact on our survey.

  17. Comparative analysis of video processing and 3D rendering for cloud video games using different virtualization technologies

    Science.gov (United States)

    Bada, Adedayo; Alcaraz-Calero, Jose M.; Wang, Qi; Grecos, Christos

    2014-05-01

    This paper describes a comprehensive empirical performance evaluation of 3D video processing employing the physical/virtual architecture implemented in a cloud environment. Different virtualization technologies, virtual video cards and various 3D benchmarks tools have been utilized in order to analyse the optimal performance in the context of 3D online gaming applications. This study highlights 3D video rendering performance under each type of hypervisors, and other factors including network I/O, disk I/O and memory usage. Comparisons of these factors under well-known virtual display technologies such as VNC, Spice and Virtual 3D adaptors reveal the strengths and weaknesses of the various hypervisors with respect to 3D video rendering and streaming.

  18. Common pharmacophore identification using frequent clique detection algorithm.

    Science.gov (United States)

    Podolyan, Yevgeniy; Karypis, George

    2009-01-01

    The knowledge of a pharmacophore, or the 3D arrangement of features in the biologically active molecule that is responsible for its pharmacological activity, can help in the search and design of a new or better drug acting upon the same or related target. In this paper, we describe two new algorithms based on the frequent clique detection in the molecular graphs. The first algorithm mines all frequent cliques that are present in at least one of the conformers of each (or a portion of all) molecules. The second algorithm exploits the similarities among the different conformers of the same molecule and achieves an order of magnitude performance speedup compared to the first algorithm. Both algorithms are guaranteed to find all common pharmacophores in the data set, which is confirmed by the validation on the set of molecules for which pharmacophores have been determined experimentally. In addition, these algorithms are able to scale to data sets with arbitrarily large number of conformers per molecule and identify multiple ligand binding modes or multiple binding sites of the target.

  19. Fever of unknown origin: Most frequent causes in adults patients.

    Science.gov (United States)

    Popovska-Jovicić, Biljana; Canović, Predrag; Gajović, Olgica; Raković, Ivana; Mijailović, Zeljko

    2016-01-01

    The differential diagnosis of fever of unknown origin (FUO) includes more than 200 different diseases and conditions. The aim of this study was to identify the most frequent causes of FUO among adult patients according to gender and age. The study included 74 patients examined from June 2010 to June 2013 at the Infectious Disease Clinic, Clinical Center Kragujevac in Serbia, according to the defined criteria for FUO. The patients were divided according to the diagnosis into four groups: infectious, malignant, rheumatic and "other diseases". A cause of febricity could not be estabilshed in a portion of subjects, and they comprised the group of undiagnosed cases. Infectious diseases were dominant in the study, followed by rheumatic diseases, which were most frequently found in women and the elderly. The diseases recognised as the most common causes of febricity were subacute thyroiditis, subacute endocarditis, Still's disease, rheumatic polymyalgia with or without temporal arteritis, and cytomegalovirus infection. In 44% of the patients, the final diagnosis was composed of only six clinical entities. The importance of establishing the diagnosis of rheumatic disease is especially emphasised, in line with other authors' research indicating the number of these diseases is on the rise. The diagnostic approach to FUO should always be directed to the known frequency of diseases.

  20. Graph Based New Approach for Frequent Pattern Mining

    Directory of Open Access Journals (Sweden)

    Anurag Choubey

    2012-03-01

    Full Text Available Association rule mining is a function of data mining research domain and frequent pattern mining is anessential part of it. Most of the previous studies on mining frequent patterns based on an Apriori approach, which required more number of database scans and operations for counting pattern supports in the database. Since the size of each set of transaction may be massive that it makes difficult to perform traditional data mining tasks. This research intends to propose a graph structure that captures only those itemsets that needs to define a sufficiently immense dataset into a submatrix representing important weights and does not give any chance to outliers. We have devised a strategy that covers significant facts of data by drilling down the large data into a succinct form of an Adjacency Matrix at different stages of mining process. The graph structure is so designed that it can be easily maintained and the trade off in compressing the large data values is reduced. Experimental results show the effectiveness of our graphbased approach.

  1. Performance of Different Experimental Absorber Designs in Absorption Heat Pump Cycle Technologies: A Review

    Directory of Open Access Journals (Sweden)

    Jonathan Ibarra-Bahena

    2014-02-01

    Full Text Available The absorber is a major component of absorption cycle systems, and its performance directly impacts the overall size and energy supplies of these devices. Absorption cooling and heating cycles have different absorber design requirements: in absorption cooling systems, the absorber works close to ambient temperature, therefore, the mass transfer is the most important phenomenon in order to reduce the generator size; on the other hand, in heat transformer absorption systems, is important to recover the heat delivered by exothermic reactions produced in the absorber. In this paper a review of the main experimental results of different absorber designs reported in absorption heat pump cycles is presented.

  2. Using electromagnetic induction technology to predict volatile fatty acid, source area differences

    Science.gov (United States)

    Subsurface sampling techniques have been adapted to measure manure accumulation on feedlot surface. Objectives of this study were to determine if sensor data could be used to predict differences in volatile fatty acids (VFA) and other volatiles produced on the feedlot surface three days following a...

  3. Choice of Appropriate Multimedia Technology and Teaching Methods for Different Culture Groups

    Science.gov (United States)

    Taratoukhina, Julia

    2014-01-01

    This paper describes the prerequisites for development in the area of cross-cultural multimedia didactics. This approach is based on research studies of differences between mentalities, ways of working with educational information, culturally-specific teaching methods and teaching techniques that determine differentiated approaches to the choice…

  4. Learning Mathematics with Technology: The Influence of Virtual Manipulatives on Different Achievement Groups

    Science.gov (United States)

    Moyer-Packenham, Patricia; Suh, Jennifer

    2012-01-01

    This study examined the influence of virtual manipulatives on different achievement groups during a teaching experiment in four fifth-grade classrooms. During a two-week unit focusing on two rational number concepts (fraction equivalence and fraction addition with unlike denominators) one low achieving, two average achieving, and one high…

  5. A Meta-Analysis Method to Advance Design of Technology-Based Learning Tool: Combining Qualitative and Quantitative Research to Understand Learning in Relation to Different Technology Features

    Science.gov (United States)

    Zhang, Lin

    2014-01-01

    Educators design and create various technology tools to scaffold students' learning. As more and more technology designs are incorporated into learning, growing attention has been paid to the study of technology-based learning tool. This paper discusses the emerging issues, such as how can learning effectiveness be understood in relation to…

  6. Measurements of radio frequent cavity volt ages by X-ray spectrum measurements

    Directory of Open Access Journals (Sweden)

    Toprek Dragan

    2005-01-01

    Full Text Available This paper deals with X-ray spectrum measurement as a method for the measurement of radio frequent cavity voltage and the theory of X-ray spectrum calculation. Experimental results at 72 MHz for three different values of the radio frequent power of ACCEL K250 super conducting cyclotron are being presented.

  7. Technological and nutritional aspect of different hemp types addition: Comparison of flour and wholemeal effect

    OpenAIRE

    Švec, I.; Hrušková, Marie; Jurinová, Ivana

    2015-01-01

    Addition of non-traditional raw-materials and flours into wheat flour follows contemporary trend of manufacturing nutritionally healthier fermented bakery products. Aim of the study follows this tendency, evaluating nutritional improvement of composite flour and baking potential of prepared wheat-hemp flour composites. Hemp products addition significantly increased both protein and dietary fibre contents. Between five types of hemp flour, differences were observed according to incorporated am...

  8. Study of seismic hazard mitigation at different time scales: applications and technological development

    OpenAIRE

    Caccavale, Mauro

    2011-01-01

    Earthquakes, weak or strong, represent always a psychological and emotional stress for people, but also a strong socio-economic impact for the affected area. The earthquake generation, the propagation of seismic waves, the seismic waves modification due to the propagation media and the interaction between seismic wave and human structures, are the main topics of different research disciplines. In the last years a wide interdisciplinary research program (physics, seismology, mathematics, geolo...

  9. Comparison of metoprolol tartrate multiple-unit lipid matrix systems produced by different technologies.

    Science.gov (United States)

    Aleksovski, Aleksandar; Van Bockstal, Pieter-Jan; Roškar, Robert; Sovány, Tamás; Regdon, Géza; De Beer, Thomas; Vervaet, Chris; Dreu, Rok

    2016-06-10

    The aim of this study was to develop, evaluate and compare extended release mini-matrices based on metoprolol tartrate (MPT) and either glyceryl behenate (GB) or glyceryl palmitostearate (GPS). Mini-matrices were produced by three different techniques: hot melt extrusion, compression of melt granulates and prilling. Hot-melt extrusion and compression of granules obtained from melted material proved to be reliable, robust and reproducible techniques with aim of obtaining extended release matrices. Prilling tended to be susceptible to increased melt viscosity. Direct compression was not applicable for mini-matrix production due to poor powder flow. In general MPT release from all matrices was affected by its loading and the size of the units/particles. Processing of GB-MPT mixtures by different techniques did not lead to different drug release rates and patterns, while in case of GPS differently obtained matrices provided diverse MPT release outcomes. Matrices based on GB tended to have higher porosity compared to ones composed of GPS and thus most of the GB-based formulations showed faster drug delivery. FT-IR analysis revealed no interactions between primary components used for matrix production and Raman mapping outlined uniform MPT distribution throughout the units. DSC and X-ray studies revealed significant changes in the crystallinity of glycerides after storage under room conditions (GPS samples) and at increased temperature (GB and GPS samples), which was correlated to the changes seen in drug release rate and pattern after storage. Media composition in general tended to insignificantly affect GB matrices, while in case of GPS matrices increasing the pH and presence of biorelevant compounds induced faster drug release.

  10. Cultivation of marine shrimp in biofloc technology (BFT system under different water alkalinities

    Directory of Open Access Journals (Sweden)

    V Piérri

    Full Text Available AbstractThe aim of this study was to evaluate the influence of different levels of alkalinity for the superintensive cultivation of marine shrimp Litopenaeus vannamei in biofloc system. A total of 12 experimental circular units of 1000L were used supplied with 850L water from a nursery, populated at a density of 165 shrimps.m–3 and average weight of 5.6 g. The treatments, in triplicate, consisted in four levels of alkalinity in the water: 40, 80, 120 and 160 mg.L–1 of calcium carbonate. To correct the alkalinity was used calcium hydroxide (CaOH. It was observed a decrease in pH of the water in the treatments with lower alkalinity (p<0.05. The total suspended settleable solids were also lower in the treatment of low alkalinity. No significant difference was observed in other physico-chemical and biological parameters in the water quality assessed, as well as the zootechnical parameters of cultivation between treatments (p≥0.05. The results of survival and growth rate of shrimps were considered suitable for the cultivation system used in the different treatments. The cultivation of marine shrimp Litopenaeus vannamei in biofloc at density of 165 shrimps.m–3 can be performed in waters with alkalinity between 40 and 160 mg.L–1 of CaCO3, without compromising the zootechnical indexes of cultivation.

  11. Supporting Frequent Updates in R-Trees: A Bottom-Up Approach

    DEFF Research Database (Denmark)

    Lee, Mong Li; Hsu, Wynne; Jensen, Christian Søndergaard;

    2003-01-01

    Advances in hardware-related technologies promise to enable new data management applications that monitor continuous processes. In these applications, enormous amounts of state samples are obtained via sensors and are streamed to a database. Further, updates are very frequent and may exhibit loca...

  12. Supporting Frequent Updates in R-Trees: A Bottom-Up Approach

    DEFF Research Database (Denmark)

    Lee, Mong Li; Hsu, Wynne; Jensen, Christian Søndergaard;

    2004-01-01

    Advances in hardware-related technologies promise to enable new data management applications that monitor continuous processes. In these applications, enormous amounts of state samples are obtained via sensors and are streamed to a database. Further, updates are very frequent and may exhibit loca...

  13. Phytochemical profiles and antioxidant activities of Chinese dark teas obtained by different processing technologies.

    Science.gov (United States)

    Lv, Hai-Peng; Zhang, Yue; Shi, Jiang; Lin, Zhi

    2017-10-01

    Dark teas are rich in secondary metabolites, such as phenolics and flavonoids, which have been suggested to be associated with their health benefits. In this study, the concentrations of tea polyphenols, tea pigments, catechins, flavonoids, alkaloid, and volatile components in 44 dark tea samples, including Pu-erh, Fuzhuan and Liubao teas, were systematically examined. Among the samples tested, Pu-erh tea contained the highest total flavonoid content (5.24±0.05%), followed by Liubao (4.45±0.61%) and Fuzhuan teas (3.33±0.23%). The tea polyphenols levels in the dark teas were approximately 10%, and no statistically significant differences (p>0.05) were found among the different types. Hexadecanoic acid was the most abundant aroma component in the dark teas, accounting for 15-20% of the total volatile oils. Moreover, the antioxidant activities of these dark teas were analyzed using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) diammonium salt (ABTS) assay, ferric reducing antioxidant power (FRAP) assay, and cellular antioxidant activity (CAA) assay (HepG2 cells). The fat metabolism modulation activities (FMMA) of the dark teas were tested using a high-throughput screening method (SMMC-7221 cells). The results indicated that the different dark teas had diverse antioxidant activities, and the variation in the activities was significant. Correlation analysis showed that there was a significant positive correlation between the levels of EGCG and antioxidant activities measured using the ABTS (r=0.916) and FRAP (r=0.853) assays, and the levels of total flavonoids and theabrownins correlated well with the values determined using the CAA (r=0.845 and 0.865, respectively) assay. Copyright © 2016 Elsevier Ltd. All rights reserved.

  14. Comparison of different criteria used to categorize technological quality of pork

    Directory of Open Access Journals (Sweden)

    Henrique Pereira Cazedey

    Full Text Available ABSTRACT: Pork may be classified into quality categories according to its color, texture and exudation, though no international consensus criterion has been reached yet. Thus, the aim of the present paper was to examine the relation between important meat quality traits, evaluating pork quality classification of a same data by different criteria proposed in the literature. In 60 pork loins (Longissimus thoracis muscle, initial pH (pH45min and R-value were evaluated after 45min post mortem between the 9th and 10th ribs, and ultimate pH (pH24h, objective color and water-holding capacity were evaluated 24h post mortem in two 2.54cm thick steaks cut between the 9th and 11th ribs to be classified into PSE (pale, soft and exudative, RSE (reddish-pink, soft and exudative, RFN (reddish-pink, firm and non-exudative or DFD (dark, firm and dry quality. Frequency distributions of quality categories differed (P<0.001 among criteria, which resulted in large variations: 3 to 68% PSE; 0 to 73% RSE; 5 to 68% RFN; 0 to 22% DFD; and 0 to 33% unclassified samples. A same sample may be classified into different quality categories according to the criterion utilized, which results in large variations in frequency distributions and also in quality attributes. Therefore, the classification of pork quality depends on the adopted criterion, which indicated the need for international standardization, so that pork quality can be determined efficiently and effectively.

  15. Structural features of Ni-Cr-Si-B materials obtained by different technologies

    OpenAIRE

    Kornienko, E. E.; Nikulina, A. A.; Belousova, N. S.; Lazurenko, D. V.; Ivashutenko, Alexander Sergeevich; Kuzmin, V. I.

    2016-01-01

    This study considers the structural features of Ni-Cr-Si-B (Ni - base; 15.1 % Cr; 2 % Si; 2 % B; 0.4 % C) materials obtained by different methods. The self-fluxing coatings were deposited by plasma spraying on the tubes from low carbon steel. Bulk cylinder specimens of 20 mm diameter and 15 mm height were obtained by spark plasma sintering (SPS). The structure and phase composition of these materials were investigated by optical microscopy (OM), scanning electron microscopy (SEM), transmissio...

  16. The consolidation of a powder material in conditions of combined influence of different technological factors

    Directory of Open Access Journals (Sweden)

    Dorofeyev V.Yu.

    2003-01-01

    Full Text Available In the present paper the problems, connected with the formation of a powder material and its surface layers in conditions of chemical thermal treatment and impregnation with melt, combined with the use of mechanical loads at different process stages are examined. The new results of liquid phase influence on compaction of powder preforms, subjected to impregnation, are obtained. The presence of a liquid phase in preform surface layers can also be connected with the change of the materials chemical composition as the result of boronizing, siliconizing or other kinds of chemical thermal treatment.

  17. Evaluation of Soybean–Navy Bean Emulsions Using Different Processing Technologies

    Directory of Open Access Journals (Sweden)

    Sean X. Liu

    2017-05-01

    Full Text Available In this study, an innovative emulsion made from soybean and navy bean blends of different proportionalities was developed. In addition, two processing methods were used: traditional cooking and jet-cooking. The physical attributes and storage stability were measured and compared. This study found that the high content of starch and fiber in navy bean flour contributes to the increase in viscosity of the emulsions, at both room and refrigeration temperatures, as the proportion of navy bean flour in the blends increased. The steam jet-cooked emulsions with higher soybean content has better shelf life stability, smaller particle size, higher fat, lower starch, and lower viscosity, whereas the traditional kettle cooking method is better in reducing anti-nutritional components. No significant difference was found between the two cooking methods in terms of nutritional contents in the emulsions, such as protein, crude fat, and total starch. The traditional kettle cooking, with its longer cooking time, seems to reduce more trypsin inhibitor in the emulsions than those prepared with the steam jet-cooking. This exploratory study is the first to report soybean–navy bean beverage prototypes having desirable nutritional value and the potential for functional beverage market.

  18. Comparative analysis of different 3D printing technology%不同金属3D打印增材制造技术对比分析

    Institute of Scientific and Technical Information of China (English)

    李素丽

    2016-01-01

    With the development of 3D printing technology, different kinds of technologies have different characteristic and classification methods. According to the different sedimentary condition, the technique of metal parts mainly include: SLS technology, SLM technology, LCD technology, 3DP technology and technology of EBM. Through different metal 3D printing material manufacturing way of contrast, it can be seen that there isn’t a technology can satisfy the high precision at the same time, excellent mechanical properties, and low cost requirements. Each technological advantages and disadvantages, application ifeld is signiifcantly different.%随着3D打印增材制造技术的发展,不同种类的成形技术有各自不同的特点和分类方法,按照成形材料不同沉积状态,金属件的成型工艺主要有SLS技术、SLM技术、LCD技术、3DP技术及EBM技术。通过不同金属3D打印增材制造方式的对比,可以看出没有一种技术可以同时满足精度高、力学性能优异、成本低的要求。各工艺优缺点明显,应用领域显著不同。

  19. Cultivation of marine shrimp in biofloc technology (BFT) system under different water alkalinities.

    Science.gov (United States)

    Piérri, V; Valter-Severino, D; Goulart-de-Oliveira, K; Manoel-do-Espírito-Santo, C; Nascimento-Vieira, F; Quadros-Seiffert, W

    2015-08-01

    The aim of this study was to evaluate the influence of different levels of alkalinity for the superintensive cultivation of marine shrimp Litopenaeus vannamei in biofloc system. A total of 12 experimental circular units of 1000L were used supplied with 850L water from a nursery, populated at a density of 165 shrimps.m-3 and average weight of 5.6 g. The treatments, in triplicate, consisted in four levels of alkalinity in the water: 40, 80, 120 and 160 mg.L-1 of calcium carbonate. To correct the alkalinity was used calcium hydroxide (CaOH). It was observed a decrease in pH of the water in the treatments with lower alkalinity (pLitopenaeus vannamei in biofloc at density of 165 shrimps.m-3 can be performed in waters with alkalinity between 40 and 160 mg.L-1 of CaCO3, without compromising the zootechnical indexes of cultivation.

  20. Re-modulated technology of WDM-PON employing different DQPSK downstream signals

    Science.gov (United States)

    Gao, Chao; Xin, Xiang-jun; Yu, Chong-xiu

    2012-11-01

    This paper proposes a kind of modulation architecture for wavelength-division-multiplexing passive optical network (WDMPON) employing optical differential quadrature phase shift keying (DQPSK) downstream signals and two different modulation formats of re-modulated upstream signals. At the optical line terminal (OLT), 10 Gbit/s signal is modulated with DQPSK. At the optical network unit (ONU), part of the downstream signal is re-modulated with on-off keying (OOK) or inverse-return-to-zero (IRZ). Simulation results show the impact on the system employing NRZ, RZ and carrier-suppressed return-to-zero (CSRZ). The analyses also reflect that the architecture can restrain chromatic dispersion and channel crosstalk, which makes it the best architecture of access network in the future.

  1. Electrochemically induced far-infrared difference spectroscopy on metalloproteins using advanced synchrotron technology.

    Science.gov (United States)

    Vita, Nicolas; Brubach, Jean-Blaise; Hienerwadel, Rainer; Bremond, Nicolas; Berthomieu, Dorothée; Roy, Pascale; Berthomieu, Catherine

    2013-03-05

    New information on a protein's structure, intra- and intermolecular hydrogen bonds, or metal-ligand bond properties can be unraveled in the far-infrared (far-IR)-terahertz-domain (600-3 cm(-1) or 18-0.1 THz). In this study, we compare the performances of thermal sources with synchrotron far-IR to record reaction-induced Fourier transform infrared (FT-IR) difference signals with proteins in solution. Using the model protein Cu-azurin placed in a short path length electrochemical cell adapted for transmission spectroscopy in vacuum-purged optics, we show that minute spectral shifts induced by metal isotope labeling or temperature changes are detected using the far-IR beamline AILES of the synchrotron SOLEIL. On one hand, these data allow us to identify modes involving Cu-ligand vibrations and pave the way for the analysis of metal sites or metal redox states of proteins not amenable to resonance Raman spectroscopy. On another hand, small band shifts or changes in band intensity upon temperature modifications show that far-IR difference spectroscopy allows one to extract from a complex background hydrogen-bonding signatures directly relevant to the protein function. For Cu-azurin, a temperature-sensitive IR mode involving Cu(II)-His vibrations points to the role of a hydrogen bond between a Cu histidine ligand and the water solvent in tuning the Cu(II)-histidine bond properties. Furthermore, these experimental data support the possible role of a His117-water interaction in electron-transfer activity of Cu-azurin proposed by theoretical studies.

  2. EFFECT OF DIFFERENT PROBIOTIC BACTERIA ON SURVIVAL RATE, GROWTH, AND PRODUCTION OF WHITELEG SHRIMP IN TRADITIONAL-PLUS TECHNOLOGY

    Directory of Open Access Journals (Sweden)

    Muharijadi Atmomarsono

    2015-06-01

    Full Text Available Instead of culturing tiger shrimp that is frequently burdened by mass mortality, whiteleg shrimp (Litopenaeus vannamei is then considered as an alternative commodity in Indonesian brackishwater ponds. To prevent the whiteleg shrimp from diseases, different probiotic bacteria were tested in completely randomized design experiment using nine 250 m2 experimental ponds stocked with 10 PLs of whiteleg shrimp fry/m2. Three treatments were applied, namely A alternate use of probiotic bacteria RICA-1, RICA-2, RICA-3; B alternate use of probiotic bacteria RICA-4, RICA-5, RICA-3, and C control (without probiotic bacteria; each with three replications. After 11-week application, the results showed that the best survival rate of whiteleg shrimp was achieved by treatment B 98.83% and the best production was achieved by treatment A (23.52 kg/250 m2. However, there were no significant differences (P>0.05 among the three treatments tested for the shrimp survival rate. The whiteleg shrimp production in treatment A and B were signicantly better (P<0.05 than that in treatment C (control. These high shrimp production in treatment A and B were mainly caused by the capability of the applied probiotics in controlling some water quality variables and Vibrio numbers.

  3. A Quantitative Comparison of Calibration Methods for RGB-D Sensors Using Different Technologies

    Directory of Open Access Journals (Sweden)

    Víctor Villena-Martínez

    2017-01-01

    Full Text Available RGB-D (Red Green Blue and Depth sensors are devices that can provide color and depth information from a scene at the same time. Recently, they have been widely used in many solutions due to their commercial growth from the entertainment market to many diverse areas (e.g., robotics, CAD, etc.. In the research community, these devices have had good uptake due to their acceptable levelofaccuracyformanyapplicationsandtheirlowcost,butinsomecases,theyworkatthelimitof their sensitivity, near to the minimum feature size that can be perceived. For this reason, calibration processes are critical in order to increase their accuracy and enable them to meet the requirements of such kinds of applications. To the best of our knowledge, there is not a comparative study of calibration algorithms evaluating its results in multiple RGB-D sensors. Specifically, in this paper, a comparison of the three most used calibration methods have been applied to three different RGB-D sensors based on structured light and time-of-flight. The comparison of methods has been carried out by a set of experiments to evaluate the accuracy of depth measurements. Additionally, an object reconstruction application has been used as example of an application for which the sensor works at the limit of its sensitivity. The obtained results of reconstruction have been evaluated through visual inspection and quantitative measurements.

  4. A Quantitative Comparison of Calibration Methods for RGB-D Sensors Using Different Technologies

    Science.gov (United States)

    Villena-Martínez, Víctor; Fuster-Guilló, Andrés; Azorín-López, Jorge; Saval-Calvo, Marcelo; Mora-Pascual, Jeronimo; Garcia-Rodriguez, Jose; Garcia-Garcia, Alberto

    2017-01-01

    RGB-D (Red Green Blue and Depth) sensors are devices that can provide color and depth information from a scene at the same time. Recently, they have been widely used in many solutions due to their commercial growth from the entertainment market to many diverse areas (e.g., robotics, CAD, etc.). In the research community, these devices have had good uptake due to their acceptable level of accuracy for many applications and their low cost, but in some cases, they work at the limit of their sensitivity, near to the minimum feature size that can be perceived. For this reason, calibration processes are critical in order to increase their accuracy and enable them to meet the requirements of such kinds of applications. To the best of our knowledge, there is not a comparative study of calibration algorithms evaluating its results in multiple RGB-D sensors. Specifically, in this paper, a comparison of the three most used calibration methods have been applied to three different RGB-D sensors based on structured light and time-of-flight. The comparison of methods has been carried out by a set of experiments to evaluate the accuracy of depth measurements. Additionally, an object reconstruction application has been used as example of an application for which the sensor works at the limit of its sensitivity. The obtained results of reconstruction have been evaluated through visual inspection and quantitative measurements. PMID:28134826

  5. Refrigerated Fruit Storage Monitoring Combining Two Different Wireless Sensing Technologies: RFID and WSN

    Directory of Open Access Journals (Sweden)

    Ricardo Badia-Melis

    2015-02-01

    Full Text Available Every day, millions of tons of temperature-sensitive goods are produced, transported, stored or distributed worldwide, thus making their temperature and humidity control essential. Quality control and monitoring of goods during the cold chain is an increasing concern for producers, suppliers, logistic decision makers and consumers. In this paper we present the results of a combination of RFID and WSN devices in a set of studies performed in three commercial wholesale chambers of 1848 m3 with different set points and products. Up to 90 semi-passive RFID temperature loggers were installed simultaneously together with seven motes, during one week in each chamber. 3D temperature mapping charts were obtained and also the psychrometric data model from ASABE was implemented for the calculation of enthalpy changes and the absolute water content of air. Thus thank to the feedback of data, between RFID and WSN it is possible to estimate energy consumption in the cold room, water loss from the products and detect any condensation over the stored commodities.

  6. INFLUENCE OF DIFFERENT TEACING TECHNOLOGIES ON BEING INFORMED ABOUT MOBILE ELEMENTS OF BASKETBALL

    Directory of Open Access Journals (Sweden)

    Goran Šekeljić

    2009-11-01

    Full Text Available This work is dedicated to the comparative presentation of the results achieved by the pupils that have been partecipated in basketball tests after the implementation of the alternative curriculum having the basketbal as its contentsl. The research has been done during 2005/2006 school year on the sample of 183 male and female pupils of the fourth grade of the primary school. The pupils have been divided in two experimental groups. The first one has realized its curriculum in basketball playground according to the stan- dards and rules of mini-basket, while the the other, experimental group, has realized its teaching contents in the standard basketball playground. The results have pointed out that the dimension of the ball, such as the height of the basket are very important related to the achievements of certain basketball tests. On the other hand, certain number of the basketball tests has not shown any significant differences that can be statistically confirmed. This work can be useful in the methodical approach while teaching the basic elements of the basketball technique

  7. Similarities and differences in bare concrete deck deterioration curves from multi NDE technology surveys

    Science.gov (United States)

    Kim, Jinyoung; Gucunski, Nenad; Dinh, Kien

    2016-04-01

    Reinforced concrete decks are in most cases the fastest deteriorating components of a bridge due to the multitude of influencing factors: direct traffic loading and environmental effects, maintenance activities (salting), etc. Among many deterioration types, corrosion-induced deterioration is the most common problem in reinforced concrete decks. The study concentrates on the condition assessment of bridge decks using complementary NDE techniques. The assessment has three main components: assessment of corrosive environment and corrosion processes, and assessment with respect to the deck delamination. The study concentrates on a complementary use of five NDE techniques: impact echo (IE) to detect and characterize delamination, ground penetrating radar (GPR) to describe the corrosive environment and detect delamination, and electrical resistivity (ER) to estimate the corrosion rate by measuring concrete resistivity. The ability of the NDE methods to objectively characterize deterioration progression is illustrated by the results from NDE surveys of 10 bridges of different ages in New Jersey during a period of one year. The deterioration progression is illustrated by condition maps and condition indices. As demonstrated in the paper, multiple deterioration models are developed utilizing the proposed methodology, which shows high potential for development of more realistic deterioration and life cycle cost models for bridge decks.

  8. Refrigerated Fruit Storage Monitoring Combining Two Different Wireless Sensing Technologies: RFID and WSN

    Science.gov (United States)

    Badia-Melis, Ricardo; Ruiz-Garcia, Luis; Garcia-Hierro, Javier; Villalba, Jose I. Robla

    2015-01-01

    Every day, millions of tons of temperature-sensitive goods are produced, transported, stored or distributed worldwide, thus making their temperature and humidity control essential. Quality control and monitoring of goods during the cold chain is an increasing concern for producers, suppliers, logistic decision makers and consumers. In this paper we present the results of a combination of RFID and WSN devices in a set of studies performed in three commercial wholesale chambers of 1848 m3 with different set points and products. Up to 90 semi-passive RFID temperature loggers were installed simultaneously together with seven motes, during one week in each chamber. 3D temperature mapping charts were obtained and also the psychrometric data model from ASABE was implemented for the calculation of enthalpy changes and the absolute water content of air. Thus thank to the feedback of data, between RFID and WSN it is possible to estimate energy consumption in the cold room, water loss from the products and detect any condensation over the stored commodities. PMID:25730482

  9. Structural features of Ni-Cr-Si-B materials obtained by different technologies

    Science.gov (United States)

    Kornienko, E. E.; Nikulina, A. A.; Belousova, N. S.; Lazurenko, D. V.; Ivashutenko, A. S.; Kuz'min, V. I.

    2016-11-01

    This study considers the structural features of Ni-Cr-Si-B (Ni - base; 15.1 % Cr; 2 % Si; 2 % B; 0.4 % C) materials obtained by different methods. The self-fluxing coatings were deposited by plasma spraying on the tubes from low carbon steel. Bulk cylinder specimens of 20 mm diameter and 15 mm height were obtained by spark plasma sintering (SPS). The structure and phase composition of these materials were investigated by optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The major phases of coatings and sintered materials are γ-Ni, Ni3B, CrB and Cr7C3. We demonstrate that the particle unmelted in the process of plasma spraying or SPS consist of γ-Ni-NEB eutectic and also CrB and Cr7C3 inclusions. The prolonged exposure of powder to high temperatures as well as slow cooling rates by SPS provide for the growth of the structural components as compared to those of plasma coatings materials. High cooling rates at the plasma spraying by melted particles contribute to the formation of supersaturated solid solution of Cr, Si and Fe in γ-Ni. The structure of the melted particles in sintering material has gradient composition: the core constituted of Ni grains of 10 μm with γ-Ni-Ni3B eutectic on the edges. The results of the experiment demonstrate that the sintering material has a smaller microhardness in comparison with plasma coatings (650 and 850 MPa, respectively), but at the same time the material has higher density (porosity less than 1 %) than plasma coatings (porosity about 2.. .3 %).

  10. Advancing Sequential Managed Aquifer Recharge Technology (SMART Using Different Intermediate Oxidation Processes

    Directory of Open Access Journals (Sweden)

    Karin Hellauer

    2017-03-01

    Full Text Available Managed aquifer recharge (MAR systems are an efficient barrier for many contaminants. The biotransformation of trace organic chemicals (TOrCs strongly depends on the redox conditions as well as on the dissolved organic carbon availability. Oxic and oligotrophic conditions are favored for enhanced TOrCs removal which is obtained by combining two filtration systems with an intermediate aeration step. In this study, four parallel laboratory-scale soil column experiments using different intermittent aeration techniques were selected to further optimize TOrCs transformation during MAR: no aeration, aeration with air, pure oxygen and ozone. Rapid oxygen consumption, nitrate reduction and dissolution of manganese confirmed anoxic conditions within the first filtration step, mimicking traditional bank filtration. Aeration with air led to suboxic conditions, whereas oxidation by pure oxygen and ozone led to fully oxic conditions throughout the second system. The sequential system resulted in an equal or better transformation of most TOrCs compared to the single step bank filtration system. Despite the fast oxygen consumption, acesulfame, iopromide, iomeprol and valsartan were degraded within the first infiltration step. The compounds benzotriazole, diclofenac, 4-Formylaminoantipyrine, gabapentin, metoprolol, valsartan acid and venlafaxine revealed a significantly enhanced removal in the systems with intermittent oxidation compared to the conventional treatment without aeration. Further improvement of benzotriazole and gabapentin removal by using pure oxygen confirmed potential oxygen limitation in the second column after aeration with air. Ozonation resulted in an enhanced removal of persistent compounds (i.e., carbamazepine, candesartan, olmesartan and further increased the attenuation of gabapentin, methylbenzotriazole, benzotriazole, and venlafaxine. Diatrizoic acid revealed little degradation in an ozone–MAR hybrid system.

  11. Conjunctival Changes in Wearers of Frequent Replacement Hydrogel and Frequent Replacement Silicone Hydrogel Contact Lenses: Comparison Using Impression Cytology Technique

    Directory of Open Access Journals (Sweden)

    Rukiye Aydın FEBO

    2014-01-01

    Full Text Available Objectives: To compare the level of conjunctival changes using conjunctival impression cytology in wearers of frequent replacement hydrogel (FRHL and frequent replacement silicone hydrogel contact lens FRSHL. Materials and Methods: Forty-two contact lens users who were seen at the Cornea and Contact Lens Unit, Department of Ophthalmology, Dokuz Eylül University were evaluated in this study. The first group consisted of wearers of FRHL used for minimum one year and maximum five years. The second group consisted of wearers who used FRSHL for minimum one year and maximum 5 years. Twenty healthy individuals with no contact lens history were included in the control group. Conjunctival impression cytology was applied to all contact lens users and the control group in order to evaluate the conjunctival changes, and the results of impression cytology were graded by the Nelson’s method. Results: In the comparison of the groups according to impression cytology scoring, there was no difference between the users of FRHL and FRSHL. Similar amounts of squamous metaplasia and goblet cell loss were encountered in both groups. Nonetheless, impression cytology grading was significantly lower in the control group than in the other two groups. Conclusion: In conclusion, the use of FRHL and FRSHL for over a year causes some histological changes in the conjunctiva such as squamous metaplasia and goblet cell loss eventually leading to dry eye symptoms. However, no differences were determined between FRHL and FRSHL users with regard to severity of conjunctival changes. (Turk J Ophthalmol 2014; 44: 47-52

  12. Performance Analysis of Variation in Power Consumption and Frequency on Different Topologies of Ring VCO in 70 nm CMOS Technology

    Directory of Open Access Journals (Sweden)

    Sumant Katiyal

    2012-07-01

    Full Text Available The proposed work describes the performance evaluation ofdifferent types of ring oscillator Voltage Controlled Oscillatortopologies on the basis of two characteristic parameters powerand frequency in 70 nm CMOS technology. The varioustopologies analyzed include Current Starved VCO, VCO withGates of PMOS Transistor Grounded, VCO with PMOS DiodeConnected, VCO with NMOS Diode Connected, VCO withvoltage applied to both PMOS and NMOS Transistor.Simulation of different parameters of ring oscillator VCO iscarried out on Tanner tool Version 13. VCO topologies areevaluated on the basis of frequency and power consumption bytaking lower supply voltage of 1.2 V. Performance evaluationand comparison of different topologies results in minimumpower consumption of 0.57 uW by Current Starved VCOtopology and maximum operating frequency of 0.57 MHz byVCO with Gates of PMOS Transistor Grounded.

  13. Non-invasive measurement of hemoglobin: assessment of two different point-of-care technologies.

    Directory of Open Access Journals (Sweden)

    Etienne Gayat

    Full Text Available BACKGROUND: Measurement of blood hemoglobin (Hb concentration is a routine procedure. Using a non-invasive point-of-care device reduces pain and discomfort for the patient and allows time saving in patient care. The aims of the present study were to assess the concordance of Hb levels obtained non-invasively with the Pronto-7 monitor (version 2.1.9, Masimo Corporation, Irvine, USA or with the NBM-200MP monitor (Orsense, Nes Ziona, Israel and the values obtained from the usual colorimetric method using blood samples and to determine the source of discordance. METHODS AND FINDINGS: We conducted two consecutive prospective open trials enrolling patients presenting in the emergency department of a university hospital. The first was designed to assess Pronto-7™ and the second NBM-200MP™. In each study, the main outcome measure was the agreement between both methods. Independent factors associated with the bias were determined using multiple linear regression. Three hundred patients were prospectively enrolled in each study. For Pronto-7™, the absolute mean difference was 0.56 g.L(-1 (95% confidence interval [CI] 0.41 to 0.69 with an upper agreement limit at 2.94 g.L(-1 (95% CI [2.70;3.19], a lower agreement limit at -1.84 g.L(-1 (95% CI [-2.08;-1.58] and an intra-class correlation coefficient at 0.80 (95% CI [0.74;0.84]. The corresponding values for the NBM-200MP™ were 0.21 [0.02;0.39], 3.42 [3.10;3.74], -3.01 [-3.32;-2.69] and 0.69 [0.62;0.75]. Multivariate analysis showed that age and laboratory values of hemoglobin were independently associated with the bias when using Pronto-7™, while perfusion index and laboratory value of hemoglobin were independently associated with the bias when using NBM-200MP™. CONCLUSION: Despite a relatively limited bias in both cases, the large limits of agreement found in both cases render the clinical usefulness of such devices debatable. For both devices, the bias is independently and inversely associated

  14. Do Science and Technology Teachers and Pre-Service Primary Teachers Have Different Thoughts about Concept Maps in Science and Technology Lessons?

    Science.gov (United States)

    Karakuyu, Yunus

    2011-01-01

    The purpose of this study is to determine the thoughts of primary science and technology teachers, primary class teachers, pre-service primary class teachers and pre-service primary science and technology teachers' about concept maps. This scale applied the use of basic and random method on the chosen 125 4th and 5th grade primary class teachers…

  15. Focus Group Study Exploring Factors Related to Frequent Sickness Absence.

    Directory of Open Access Journals (Sweden)

    Annette Notenbomer

    Full Text Available Research investigating frequent sickness absence (3 or more episodes per year is scarce and qualitative research from the perspective of frequent absentees themselves is lacking. The aim of the current study is to explore awareness, determinants of and solutions to frequent sickness absence from the perspective of frequent absentees themselves.We performed a qualitative study of 3 focus group discussions involving a total of 15 frequent absentees. Focus group discussions were audiotaped and transcribed verbatim. Results were analyzed with the Graneheim method using the Job Demands Resources (JD-R model as theoretical framework.Many participants were not aware of their frequent sickness absence and the risk of future long-term sickness absence. As determinants, participants mentioned job demands, job resources, home demands, poor health, chronic illness, unhealthy lifestyles, and diminished feeling of responsibility to attend work in cases of low job resources. Managing these factors and improving communication (skills were regarded as solutions to reduce frequent sickness absence.The JD-R model provided a framework for determinants of and solutions to frequent sickness absence. Additional determinants were poor health, chronic illness, unhealthy lifestyles, and diminished feeling of responsibility to attend work in cases of low job resources. Frequent sickness absence should be regarded as a signal that something is wrong. Managers, supervisors, and occupational health care providers should advise and support frequent absentees to accommodate job demands, increase both job and personal resources, and improve health rather than express disapproval of frequent sickness absence and apply pressure regarding work attendance.

  16. Two Different Maintenance Strategies in the Hospital Environment: Preventive Maintenance for Older Technology Devices and Predictive Maintenance for Newer High-Tech Devices.

    Science.gov (United States)

    Sezdi, Mana

    2016-01-01

    A maintenance program generated through the consideration of characteristics and failures of medical equipment is an important component of technology management. However, older technology devices and newer high-tech devices cannot be efficiently managed using the same strategies because of their different characteristics. This study aimed to generate a maintenance program comprising two different strategies to increase the efficiency of device management: preventive maintenance for older technology devices and predictive maintenance for newer high-tech devices. For preventive maintenance development, 589 older technology devices were subjected to performance verification and safety testing (PVST). For predictive maintenance development, the manufacturers' recommendations were used for 134 high-tech devices. These strategies were evaluated in terms of device reliability. This study recommends the use of two different maintenance strategies for old and new devices at hospitals in developing countries. Thus, older technology devices that applied only corrective maintenance will be included in maintenance like high-tech devices.

  17. Constructing Projection Frequent Pattern Tree for Efficient Mining

    Institute of Scientific and Technical Information of China (English)

    XiangJian-wen; HeYan-xiang; KokichiFutatsugi; KongWei-qiang

    2003-01-01

    Frequent Pattern mining plays an essential role in data mining.Most of the previous studies adopt an Apriori-like candidate set generation-and-test approach. However, candidate set generation is still costly, especially when there exist prolific patterns and/or long patterns. In this study, we introduce a novel frequent pattern growth (FP-growth)method, which is efficient and scalable for mining both long and short frequent patterns without candidate generation. And build a new projection frequent pattern tree (PFP-tree) algorithm on this study, which not only heirs all the advantages in the FP-growth method, but also avoids it's bottleneck in database size dependence when constructing the frequent pattern tree (FP-tree). Efficiency of mining is achieved by introducing the projection technique, which avoid serial scan each frequent item in the database, the cost is mainly related to the depth of the tree, namely the number of frequent items of the longest transaction in the database, not the sum of all the frequent items in the database,which hugely shortens the time of tree-construction. Our performance study shows that the PFP-tree method is efficient and scalable for mining large databases or data warehouses, and is even about an order of magnitude faster than the FP-growth method.

  18. Constructing Projection Frequent Pattern Tree for Efficient Mining

    Institute of Scientific and Technical Information of China (English)

    Xiang Jian-wen; He Yan-xiang; Kokichi Futatsugi; Kong Wei-qiang

    2003-01-01

    Frequent Pattern mining plays an essential role in data mining.Most of the previous studies adopt an Apriori-like candidate set generation-and-test approach. However, candidate set generation is still costly, especially when there exist prolific patterns and/or long patterns.In this study, we introduce a novel frequent pattern growth (FP-growth)method, which is efficient and scalable for mining both long and short frequent patterns without candidate generation. And build a new projection frequent pat-tern tree (PFP-tree) algorithm on this study, which not only heirs all the ad-vantages in the FP-growth method, but also avoids it's bottleneck in database size dependence when constructing the frequent pattern tree (FP-tree). Effi-ciency of mining is achieved by introducing the projection technique, which avoid serial scan each frequent item in the database, the cost is mainly related to the depth of the tree, namely the number of frequent items of the longest trans-action in the database, not the sum of all the frequent items in the database,which hugely shortens the time of tree-construction. Our performance study shows that the PFP-tree method is efficient and scalable for mining large databas-es or data warehouses, and is even about an order of magnitude faster than the FP-growth method.

  19. Social environment and frequent attendance in Danish general practice

    DEFF Research Database (Denmark)

    Vedsted, Peter; Olesen, Frede

    2005-01-01

    of 1423 (73.7%) frequent attenders and 1103 (74.9%) infrequent attenders responded. Male frequent attendance was associated, with statistical significance, with living alone and being without work or on a disability pension. Among women, lack of professional education or being without work tended...

  20. Classification and Target Group Selection Based Upon Frequent Patterns

    NARCIS (Netherlands)

    W.H.L.M. Pijls (Wim); R. Potharst (Rob)

    2000-01-01

    textabstractIn this technical report , two new algorithms based upon frequent patterns are proposed. One algorithm is a classification method. The other one is an algorithm for target group selection. In both algorithms, first of all, the collection of frequent patterns in the training set is constr

  1. User Experiences While Playing Dance-Based Exergames and the Influence of Different Body Motion Sensing Technologies

    Directory of Open Access Journals (Sweden)

    Alasdair G. Thin

    2013-01-01

    Full Text Available Dance Dance Revolution is a pioneering exergame which has attracted considerable interest for its potential to promote regular exercise and its associated health benefits. The advent of a range of different consumer body motion tracking video game console peripherals raises the question whether their different technological affordances (i.e., variations in the type and number of body limbs that they can track influence the user experience while playing dance-based exergames both in terms of the level of physical exertion and the nature of the play experience. To investigate these issues a group of subjects performed a total of six comparable dance routines selected from commercial dance-based exergames (two routines from each game on three different consoles. The subjects’ level of physical exertion was assessed by measuring oxygen consumption and heart rate. They also reported their perceived level of exertion, difficulty, and enjoyment ratings after completing each dance routine. No differences were found in the physiological measures of exertion between the peripherals/consoles. However, there were significant variations in the difficulty and enjoyment ratings between peripherals. The design implications of these results are discussed including the tension between helping to guide and coordinate player movement versus offering greater movement flexibility.

  2. Posture variation among office workers when using different information and communication technologies at work and away from work.

    Science.gov (United States)

    Ciccarelli, Marina; Straker, Leon; Mathiassen, Svend Erik; Pollock, Clare

    2014-01-01

    Office workers perform tasks using different information and communication technologies (ICT) involving various postures. Adequate variation in postures and muscle activity is generally believed to protect against musculoskeletal complaints, but insufficient information exists regarding the effect on postural variation of using different ICT. Thus, this study among office workers aimed to determine and compare postures and postural variation associated with using distinct types of ICT. Upper arm, head and trunk postures of 24 office workers were measured with the Physiometer over a whole day in their natural work and away-from-work environments. Postural variation was quantified using two indices: APDF(90-10) and EVA(sd). Various ICT had different postural means and variation. Paper-based tasks had more non-neutral, yet also more variable postures. Electronics-based tasks had more neutral postures, with less postural variability. Tasks simultaneously using paper- and electronics-based ICT had least neutral and least variable postures. Tasks without ICT usually had the most posture variability. Interspersing tasks involving different ICT could increase overall exposure variation among office workers and may thus contribute to musculoskeletal risk reduction.

  3. The level of toxic and essential trace elements in hair of petrochemical workers involved in different technological processes.

    Science.gov (United States)

    Skalny, Anatoly V; Kaminskaya, Galina A; Krekesheva, Tatyana I; Abikenova, Sholpan K; Skalnaya, Margarita G; Berezkina, Elena S; Grabeklis, Andrei R; Tinkov, Alexey A

    2017-02-01

    The objective of the investigation is comparative analysis of hair trace element content in workers of different departments of petrochemical plant. A total of 75 men working in office (engineers), and departments 1 (D1), 3 (D3), and 4 (D4) of the petrochemical plant, as well as occupationally non-exposed persons, were examined. Hair trace element levels were analyzed using inductively coupled plasma mass spectrometry. The office workers were characterized by the highest hair As, Hg, Sn, I, and Si content as compared to the workers of other departments, whereas the level of those elements did not differ significantly from the control values. It is notable that hair Be levels in all employees of petrochemical plant were significantly lower, whereas Se content was significantly higher than that in unexposed controls. Hair toxic trace element content in workers directly involved in industrial processes did not differ significantly or was lower than that in the control group. At the same time, the highest levels of essential trace elements (Cr, Fe, and I) were observed in employees working in primary oil refining (D1). Hair levels of Co, I, and Li were maximal in persons of sulfur and bitumen-producing division (D4). The lowest levels of both essential and toxic trace elements in hair were detected in employees involved in production of liquefied gas, kerosene, and diesel fuel (D3). The obtained data demonstrate that involvement in different technological processes in petrochemical complex differentially affect hair trace element content in workers.

  4. Technology Education for Children in Primary Schools in Finland and Germany: Different School Systems, Similar Problems and How to Overcome Them

    Science.gov (United States)

    Rasinen, Aki; Virtanen, Sonja; Endepohls-Ulpe, Martina; Ikonen, Pasi; Ebach, Judith; Stahl-von Zabern, Janine

    2009-01-01

    Even if the results of international student assessment studies such as PISA or TIMSS show that girls have been catching up in mathematics and natural sciences, there are still remarkable gender differences in the number of males and females studying and working in the technological fields after basic education. Technology is still a…

  5. Persons with Mild or Moderate Alzheimer's Disease Use a Basic Orientation Technology to Travel to Different Rooms within a Day Center

    Science.gov (United States)

    Lancioni, Giulio E.; Perilli, Viviana; Singh, Nirbhay N.; O'Reilly, Mark F.; Sigafoos, Jeff; Bosco, Andrea; De Caro, Maria Fara; Cassano, Germana; Pinto, Katia; Minervini, Mauro

    2011-01-01

    This study assessed whether three patients with Alzheimer's disease could learn to use a basic orientation technology to reach different rooms within a day center. At each travel instance, the technology provided verbal messages (cues) from the room to reach. For the first two patients, the messages were presented at intervals of about 15 s. For…

  6. Persons with Mild or Moderate Alzheimer's Disease Use a Basic Orientation Technology to Travel to Different Rooms within a Day Center

    Science.gov (United States)

    Lancioni, Giulio E.; Perilli, Viviana; Singh, Nirbhay N.; O'Reilly, Mark F.; Sigafoos, Jeff; Bosco, Andrea; De Caro, Maria Fara; Cassano, Germana; Pinto, Katia; Minervini, Mauro

    2011-01-01

    This study assessed whether three patients with Alzheimer's disease could learn to use a basic orientation technology to reach different rooms within a day center. At each travel instance, the technology provided verbal messages (cues) from the room to reach. For the first two patients, the messages were presented at intervals of about 15 s. For…

  7. An Efficient Algorithm for Mining Maximal Frequent Item Sets

    Directory of Open Access Journals (Sweden)

    A. M.J.M.Z. Rahman

    2008-01-01

    Full Text Available Problem Statement: In today's life, the mining of frequent patterns is a basic problem in data mining applications. The algorithms which are used to generate these frequent patterns must perform efficiently. The objective was to propose an effective algorithm which generates frequent patterns in less time. Approach: We proposed an algorithm which was based on hashing technique and combines a vertical tidset representation of the database with effective pruning mechanisms. It removes all the non-maximal frequent item-sets to get exact set of MFI directly. It worked efficiently when the number of item-sets and tid-sets is more. Results: The performance of our algorithm had been compared with recently developed MAFIA algorithm and the results show how our algorithm gives better performance. Conclusions: Hence, the proposed algorithm performs effectively and generates frequent patterns faster.

  8. Pushing Multiple Convertible Constrains into Frequent Itemsets Mining

    Institute of Scientific and Technical Information of China (English)

    SONG Baoli; QIN Zheng

    2006-01-01

    Constraint pushing techniques have been developed for mining frequent patterns and association rules. However, multiple constraints cannot be handled with existing techniques in frequent pattern mining. In this paper, a new algorithm MCFMC (mining complete set of frequent itemsets with multiple constraints) is introduced. The algorithm takes advantage of the fact that a convertible constraint can be pushed into mining algorithm to reduce mining research spaces. By using a sample database, the algorithm develops techniques which select an optimal method based on a sample database to convert multiple constraints into multiple convertible constraints, disjoined by conjunction and/or, and then partition these constraints into two parts. One part is pushed deep inside the mining process to reduce the research spaces for frequent itemsets, the other part that cannot be pushed in algorithm is used to filter the complete set of frequent itemsets and get the final result. Results from our detailed experiment show the feasibility and effectiveness of the algorithm.

  9. Screening of microalgae for integral biogas slurry nutrient removal and biogas upgrading by different microalgae cultivation technology.

    Science.gov (United States)

    Wang, Xue; Bao, Keting; Cao, Weixing; Zhao, Yongjun; Hu, Chang Wei

    2017-07-14

    The microalgae-based technology has been developed to reduce biogas slurry nutrients and upgrade biogas simultaneously. In this work, five microalgal strains named Chlorella vulgaris, Scenedesmus obliquus, Selenastrum capricornutum, Nitzschia palea, and Anabaena spiroides under mono- and co-cultivation were used for biogas upgrading. Optimum biogas slurry nutrient reduction could be achieved by co-cultivating microalgae (Chlorella vulgaris, Scenedesmus obliquus, and Nitzschia palea) with fungi using the pelletization technology. In addition, the effects of different ratio of mixed LED light wavelengths applying mixed light-emitting diode during algae strains and fungi co-cultivation on CO2 and biogas slurry nutrient removal efficiency were also investigated. The results showed that the COD (chemical oxygen demand), TN (total nitrogen), and TP (total phosphorus) removal efficiency were 85.82 ± 5.37%, 83.31 ± 4.72%, and 84.26 ± 5.58%, respectively at red: blue = 5:5 under the co-cultivation of S. obliquus and fungi. In terms of biogas upgrading, CH4 contents were higher than 90% (v/v) for all strains, except the co-cultivation with S. obliquus and fungi at red: blue = 3:7. The results indicated that co-cultivation of microalgae with fungi under mixed light wavelengths treatments was most successful in nutrient removal from wastewater and biogas upgrading.

  10. Predictors of Frequent Emergency Room Visits among a Homeless Population.

    Directory of Open Access Journals (Sweden)

    Kinna Thakarar

    Full Text Available Homelessness, HIV, and substance use are interwoven problems. Furthermore, homeless individuals are frequent users of emergency services. The main purpose of this study was to identify risk factors for frequent emergency room (ER visits and to examine the effects of housing status and HIV serostatus on ER utilization. The second purpose was to identify risk factors for frequent ER visits in patients with a history of illicit drug use.A retrospective analysis was performed on 412 patients enrolled in a Boston-based health care for the homeless program (HCH. This study population was selected as a 2:1 HIV seronegative versus HIV seropositive match based on age, sex, and housing status. A subgroup analysis was performed on 287 patients with history of illicit drug use. Chart data were analyzed to compare demographics, health characteristics, and health service utilization. Results were stratified by housing status. Logistic models using generalized estimating equations were used to predict frequent ER visits.In homeless patients, hepatitis C was the only predictor of frequent ER visits (OR 4.49, p<0.01. HIV seropositivity was not predictive of frequent ER visits. In patients with history of illicit drug use, mental health (OR 2.53, 95% CI 1.07-5.95 and hepatitis C (OR 2.85, 95% CI 1.37-5.93 were predictors of frequent ER use. HIV seropositivity did not predict ER use (OR 0.45, 95% CI 0.21 - 0.97.In a HCH population, hepatitis C predicted frequent ER visits in homeless patients. HIV seropositivity did not predict frequent ER visits, likely because HIV seropositive HCH patients are engaged in care. In patients with history of illicit drug use, hepatitis C and mental health disorders predicted frequent ER visits. Supportive housing for patients with mental health disorders and hepatitis C may help prevent unnecessary ER visits in this population.

  11. Thermal shock behavior of fine grained W-Y2O3 materials fabricated via two different manufacturing technologies

    Science.gov (United States)

    Zhao, Mingyue; Zhou, Zhangjian; Zhong, Ming; Tan, Jun; Lian, Youyun; Liu, Xiang

    2016-03-01

    Thermal shock resistance of fine grained W-Y2O3 materials fabricated by two different manufacturing technologies (i.e. spark plasma sintering and high temperature sintering in combination with hot rolling deformation) was examined under transient high heat loads below and slightly above the melting threshold of pure tungsten. The tests were performed with the electron beam test facility EMS-60 at Southwestern Institute of Physics, China. The comparison of the thermal shock response in this work showed that the deformed W-Y2O3 performed a superior behavior to spark plasma sintered W-Y2O3 in suppressing the crack formation, melting resistance and recrystallization resistance. The thermo-physical properties and mechanical characterizations necessary for understanding the thermal shock response of these materials were also presented and discussed.

  12. Differences in the use of everyday technology among persons with MCI, SCI and older adults without known cognitive impairment.

    Science.gov (United States)

    Malinowsky, Camilla; Kottorp, Anders; Wallin, Anders; Nordlund, Arto; Björklund, Eva; Melin, Ilse; Pernevik, Anette; Rosenberg, Lena; Nygård, Louise

    2017-07-01

    To use valid subjective reports sensible to cognitive decline is vital to identify very early signs of dementia development. Use of everyday technology (ET) has been shown to be sensitive to differentiate adults with mild cognitive impairment (MCI) from controls, but the group with subjective cognitive impairment (SCI) has not yet been examined. This study aims to investigate and compare self-perceived ability in ET use and number of ETs reported as actually used in a sample of older adults with SCI, MCI, and older adults with no known cognitive impairment, i.e. Older adults with MCI (n = 29), SCI ( n = 26), and controls (n = 30) were interviewed with the short version of the Everyday Technology Use Questionnaire (S-ETUQ) to capture self-perceived ability in ET use and number of ETs used. To generate individual measures of ability to use ET, Rasch analysis was used. The measures were then compared group-wise using ANCOVA. The numbers of ETs used were compared group-wise with ANOVA. Controls versus SCI and MCI differed significantly regarding ETs reported as used, but not SCI versus MCI. Similarly, in ability to use ET, controls versus SCI and MCI differed significantly but not SCI versus MCI. The significantly lower numbers of ETs reported as actually used and the lower ability in SCI and MCI groups compared to controls suggest that ET use is affected already in very minor cognitive decline. This indicates that self-reported ET use based on the S-ETUQ is sensitive to detect changes already in SCI.

  13. Microfluidic Method of Pig Oocyte Quality Assessment in relation to Different Follicular Size Based on Lab-on-Chip Technology

    Directory of Open Access Journals (Sweden)

    Bartosz Kempisty

    2014-01-01

    Full Text Available Since microfollicular environment and the size of the follicle are important markers influencing oocyte quality, the aim of this study is to present the spectral characterization of oocytes isolated from follicles of various sizes using lab-on-chip (LOC technology and to demonstrate how follicle size may affect oocyte quality. Porcine oocytes (each, n=100 recovered from follicles of different sizes, for example, from large (>5 mm, medium (3–5 mm, and small (<3 mm, were analyzed after preceding in vitro maturation (IVM. The LOC analysis was performed using a silicon-glass sandwich with two glass optical fibers positioned “face-to-face.” Oocytes collected from follicles of different size classes revealed specific and distinguishable spectral characteristics. The absorbance spectra (microspectrometric specificity for oocytes isolated from large, medium, and small follicles differ significantly (P<0.05 and the absorbance wavelengths were between 626 and 628 nm, between 618 and 620 nm, and less than 618 nm, respectively. The present study offers a parametric and objective method of porcine oocyte assessment. However, up to now this study has been used to evidence spectral markers associated with follicular size in pigs, only. Further investigations with functional-biological assays and comparing LOC analyses with fertilization and pregnancy success and the outcome of healthy offspring must be performed.

  14. Investigation on interaction of DNA and several cationic surfactants with different head groups by spectroscopy, gel electrophoresis and viscosity technologies.

    Science.gov (United States)

    Guo, Qing; Zhang, Zhaohong; Song, Youtao; Liu, Shuo; Gao, Wei; Qiao, Heng; Guo, Lili; Wang, Jun

    2017-02-01

    In this study, the interaction between DNA and several cationic surfactants with different head groups such as ethyl hexadecyl dimethyl ammonium bromide (EHDAB), hexadecyl dimethyl benzyl ammonium chloride (HDBAC), and cetyl pyridinium bromide (CPB) were investigated by UV-vis absorption, fluorescence and circular dichroism (CD) spectroscopy, gel electrophoresis, and viscosity technologies. The results show that these cationic surfactants can interact with DNA and major binding modes are electrostatic and hydrophobic. Also, CPB and HDBAC molecules interact with DNA by partial intercalation, and CPB has slightly stronger intercalation than HDBAC, while EHDAB interacts with DNA by non-intercalation. The different head groups of the surfactant molecules can influence the interaction strength. CPB has the stronger interaction with DNA than the others. Moreover, surfactant concentration, the ratio of DNA and fluorescence probe, ionic strength can influence the interaction. The surfactants may interact with DNA by the competition reactions with BR for DNA-BR. The increase of ionic strength may favor the surface binding between DNA and surfactants to some extent. This work provides deep mechanistic insight on the toxicity of cationic surfactants with different head groups to DNA molecules.

  15. Efficient Mining of Frequent Closed XML Query Pattern

    Institute of Scientific and Technical Information of China (English)

    Jian-Hua Feng; Qian Qian; Jian-Yong Wang; Li-Zhu Zhou

    2007-01-01

    Previous research works have presented convincing arguments that a frequent pattern mining algorithm should not mine all frequent but only the closed ones because the latter leads to not only more compact yet complete result set but also better efficiency. Upon discovery of frequent closed XML query patterns, indexing and caching can be effectively adopted for query performance enhancement. Most of the previous algorithms for finding frequent patterns basically introduced a straightforward generate-and-test strategy. In this paper, we present SOLARIA*, an efficient algorithm for mining frequent closed XML query patterns without candidate maintenance and costly tree-containment checking. Efficient algorithm of sequence mining is involved in discovering frequent tree-structured patterns, which aims at replacing expensive containment testing with cheap parent-child checking in sequences. SOLARIA* deeply prunes unrelated search space for frequent pattern enumeration by parent-child relationship constraint. By a thorough experimental study on various real-life data, we demonstrate the efficiency and scalability of SOLARIA* over the previous known alternative. SOLARIA* is also linearly scalable in terms of XML queries' size.

  16. EFFICIENT ALGORITHM FOR MINING FREQUENT ITEMSETS USING CLUSTERING TECHNIQUES

    Directory of Open Access Journals (Sweden)

    D.Kerana Hanirex

    2011-03-01

    Full Text Available Now a days, Association rule plays an important role. The purchasing of one product when another product is purchased represents an association rule. The Apriori algorithm is the basic algorithm for mining association rules. This paper presents an efficient Partition Algorithm for Mining Frequent Itemsets(PAFI using clustering. This algorithm finds the frequent itemsets by partitioning the database transactions into clusters. Clusters are formed based on the imilarity measures between the transactions. Then it finds the frequent itemsets with the transactions in the clusters directly using improved Apriori algorithm which further reduces the number of scans in the database and hence improve the efficiency.

  17. Frequent Trajectory Patterns Mining for Intelligent Visual Surveillance System

    Institute of Scientific and Technical Information of China (English)

    QU Lin; CHEN Yao-wu

    2009-01-01

    A frequent trajectory patterns mining algorithm is proposed to learn the object activities and classify the trajectories in intelligent visual surveillance system. The distribution patterns of the trajectories were generated by an Apriori based frequent patterns mining algorithm and the trajectories were classified by the frequent trajectory patterns generated. In addition, a fuzzy c-mcans (FCM) based learning algorithm and a mean shift based clustering procedure were used to construct the representation of trajectories. The algorithm can be further used to describe activities and identify anomalies. The experiments on two real scenes show that the algorithm is effective.

  18. Two Different Maintenance Strategies in the Hospital Environment: Preventive Maintenance for Older Technology Devices and Predictive Maintenance for Newer High-Tech Devices

    OpenAIRE

    Mana Sezdi

    2016-01-01

    A maintenance program generated through the consideration of characteristics and failures of medical equipment is an important component of technology management. However, older technology devices and newer high-tech devices cannot be efficiently managed using the same strategies because of their different characteristics. This study aimed to generate a maintenance program comprising two different strategies to increase the efficiency of device management: preventive maintenance for older tec...

  19. Determining frequent patterns of copy number alterations in cancer.

    Directory of Open Access Journals (Sweden)

    Franck Rapaport

    Full Text Available Cancer progression is often driven by an accumulation of genetic changes but also accompanied by increasing genomic instability. These processes lead to a complicated landscape of copy number alterations (CNAs within individual tumors and great diversity across tumor samples. High resolution array-based comparative genomic hybridization (aCGH is being used to profile CNAs of ever larger tumor collections, and better computational methods for processing these data sets and identifying potential driver CNAs are needed. Typical studies of aCGH data sets take a pipeline approach, starting with segmentation of profiles, calls of gains and losses, and finally determination of frequent CNAs across samples. A drawback of pipelines is that choices at each step may produce different results, and biases are propagated forward. We present a mathematically robust new method that exploits probe-level correlations in aCGH data to discover subsets of samples that display common CNAs. Our algorithm is related to recent work on maximum-margin clustering. It does not require pre-segmentation of the data and also provides grouping of recurrent CNAs into clusters. We tested our approach on a large cohort of glioblastoma aCGH samples from The Cancer Genome Atlas and recovered almost all CNAs reported in the initial study. We also found additional significant CNAs missed by the original analysis but supported by earlier studies, and we identified significant correlations between CNAs.

  20. Hypervascularity is more frequent in medullary thyroid carcinoma

    Science.gov (United States)

    Lai, Xingjian; Liu, Meijuan; Xia, Yu; Wang, Liang; Bi, Yalan; Li, Xiaoyi; Zhang, Bo; Yang, Meng; Dai, Qing; Jiang, Yuxin

    2016-01-01

    Abstract This study was designed to retrospectively compare the sonographic features of medullary thyroid carcinoma (MTC) and the features of papillary thyroid carcinoma (PTC). A total of 97 patients with 127 MTCs between January 2000 and January 2016 and 107 consecutive patients with 132 PTCs were included in this study. Two radiologists retrospectively determined the sonographic features and compared the findings of MTCs and PTCs. Compared with the patients with PTCs, the patients with MTCs were older (46.9 years vs 42.9 years, P = 0.016) and the male proportion was higher (53.6% vs 33.6%, P = 0.005). Most of the MTCs had an irregular shape (72.4%), a length/width ratio hypoechogenicity (96.9%), heterogeneous echotexture (76.4%), no cystic change (78.7%), calcification (63.8%), and hypervascularity (72.4%). There was no significant difference in the boundary, peripheral halo ring, echogenicity, and calcification between the MTCs and PTCs. However, compared with the PTCs, a larger size (2.2 vs 1.2 cm, P hypoechogenicity, the presence of microcalcifications, and increased intranodular vascularity. However, MTCs tend to possess these suspicious sonographic features less often than PTCs, with the exception of hypervascularity, which was more frequent in MTCs. PMID:27930537

  1. [Frequent causes of diarrhea: celiac disease and lactose intolerance].

    Science.gov (United States)

    Jankowiak, Carsten; Ludwig, Diether

    2008-06-15

    Celiac disease and lactose intolerance are both relatively frequent diseases with symptoms occurring after ingestion of certain food components. In celiac disease wheat gluten and related proteins of other cereals induce an inflammatory disease of the small intestine in predisposed individuals, leading to gastrointestinal and extraintestinal symptoms. Moreover, there is an association with many other diseases and besides classic symptoms (diarrhea, weight loss, malabsorption) atypical courses with less or lacking gastrointestinal symptoms exist. The prevalence is about 1 : 100 (Europe, USA) and higher than supposed earlier. Diagnostic criteria include serologic tests (tissue transglutaminase antibody, endomysial antibody) and characteristic small bowel histology (lymphocytic infiltration, villous atrophy). Therapy is a strict and lifelong gluten-free diet. Rarely, refractory disease or lack of compliance are associated with increased risk of malignancy and worse prognosis. Lactose intolerance is attributed to low intestinal lactase levels, due to reduced genetic expression or mucosal injury and consequent intolerance to dairy products. The frequency is varying in different ethnic groups, occurring in 10-15% of Northern European people. Intensity of clinical symptoms (diarrhea, abdominal pain, bloating) depends on the amount of ingested lactose and individual activity of intestinal lactase. The capacity of lactose malabsorption can be measured using the noninvasive lactose breath hydrogen test. The treatment is based on a reduced dietary lactose intake or in case of secondary form treatment of the underlying disease.

  2. Understanding the Differences in Molecular Conformation of Carbohydrate and Protein in Endosperm Tissues of Grains with Different Biodegradation Kinetics Using Advanced Synchrotron Technology

    Energy Technology Data Exchange (ETDEWEB)

    Yu, P.; Block, H; Doiron, K

    2009-01-01

    Conventional 'wet' chemical analyses rely heavily on the use of harsh chemicals and derivatization, thereby altering native seed structures leaving them unable to detect any original inherent structures within an intact tissue sample. A synchrotron is a giant particle accelerator that turns electrons into light (million times brighter than sunlight) which can be used to study the structure of materials at the molecular level. Synchrotron radiation-based Fourier transform IR microspectroscopy (SR-FTIRM) has been developed as a rapid, direct, non-destructive and bioanalytical technique. This technique, taking advantage of the brightness of synchrotron light and a small effective source size, is capable of exploring the molecular chemistry within the microstructures of a biological tissue without the destruction of inherent structures at ultraspatial resolutions within cellular dimensions. This is in contrast to traditional 'wet' chemical methods, which, during processing for analysis, often result in the destruction of the intrinsic structures of feeds. To date there has been very little application of this technique to the study of plant seed tissue in relation to nutrient utilization. The objective of this study was to use novel synchrotron radiation-based technology (SR-FTIRM) to identify the differences in the molecular chemistry and conformation of carbohydrate and protein in various plant seed endosperms within intact tissues at cellular and subcellular level from grains with different biodegradation kinetics. Barley grain (cv. Harrington) with a high rate (31.3%/h) and extent (78%), corn grain (cv. Pioneer) with a low rate (9.6%/h) and extent of (57%), and wheat grain (cv. AC Barrie) with an intermediate rate (23%/h) and extent (72%) of ruminal DM degradation were selected for evaluation. SR-FTIRM evaluations were performed at the National Synchrotron Light Source at the Brookhaven National Laboratory (Brookhaven, NY). These results suggest

  3. Unsupervised mining of frequent tags for clinical eligibility text indexing

    National Research Council Canada - National Science Library

    Miotto, Riccardo; Weng, Chunhua

    2013-01-01

    .... This paper proposes a novel methodology to derive a semantic index for clinical eligibility documents based on a controlled vocabulary of frequent tags, which are automatically mined from the text...

  4. Frequently Asked Questions about Measles in the U.S.

    Science.gov (United States)

    ... Pan American Health Organization Frequently Asked Questions about Measles in the U.S. Language: English (US) Español ( ... I’ve been exposed to someone who has measles. What should I do? A: Immediately call your ...

  5. Stability of the frequent COPD exacerbator in the general population

    DEFF Research Database (Denmark)

    Reilev, Mette; Lykkegaard, Jesper; Halling, Anders

    2017-01-01

    Exacerbation frequency is central in treatment strategies for chronic obstructive pulmonary disease. However, whether chronic obstructive pulmonary disease patients from the general population with frequent exacerbations continue to have frequent exacerbations over an extended period of time...... no additional years as frequent exacerbators, while the minority (6%) remained in this category each year. In conclusion, the rate of exacerbations shows considerable variation over time among chronic obstructive pulmonary disease patients in the general population. This might hold implications for chronic...... is currently unknown. In this study, we aimed to investigate the stability of the frequent exacerbator in a population-based setting. To this end, we conducted a nationwide register-based descriptive study with a 10-year follow-up period of chronic obstructive pulmonary disease patients with at least one...

  6. Deranged Wnt signaling is frequent in hereditary nonpolyposis colorectal cancer

    DEFF Research Database (Denmark)

    Isinger-Ekstrand, Anna; Therkildsen, Christina; Bernstein, Inge

    2011-01-01

    The Wnt signaling pathway is frequently deranged in colorectal cancer and is a key target for future preventive and therapeutic approaches. Colorectal cancers associated with the hereditary nonpolyposis colorectal cancer (HNPCC) syndrome are characterized by wide-spread microsatellite instability...

  7. Frequently Asked Questions about Ventilator-Associated Pneumonia

    Science.gov (United States)

    ... Submit Button Frequently Asked Questions about Ventilator-associated Pneumonia Recommend on Facebook Tweet Share Compartir What is a Ventilator-associated Pneumonia (VAP)? Ventilator-associated pneumonia (VAP) is a lung ...

  8. THE FREQUENT SKIN DISEASES DIAGNOSED AT UNIVERSITY STUDENTS

    Directory of Open Access Journals (Sweden)

    Yesim KAYMAK

    2005-12-01

    Full Text Available The incidence of some skin diseases are increasing at adolescent and early adulthood period. The most frequent disease at this period is acne vulgaris whereas fungal diseases, dermatitis, dermatosis which are due to stress and other reasons, oral mucosal lesions and herpetic lesions of perioral region are also frequent. In this research we aim to determine the frequent dermatologic diseases of university students and 147 female, 74 male, a total of 221 students are included. We questioned the dermatologic complaints of students, then examined dermatologically in detail and registered ages, sexes, findings of the dermatological examination and dermatological diagnostic informations. As a result it is found out that the most frequent diseases are acne vulgaris (34.1%, allergic and pruritic dermatosis (16.6%, fungal diseases ( 13.0%, and eritamatous-squamous disease (8.3%. [TAF Prev Med Bull 2005; 4(6.000: 313-320

  9. A NEW ASSOCIATION RULE MINING BASED ON FREQUENT ITEM SET

    Directory of Open Access Journals (Sweden)

    Ms. Sanober Shaikh

    2011-09-01

    Full Text Available In this paper a new mining algorithm is defined based on frequent item set. Apriori Algorithm scans the database every time when it finds the frequent item set so it is very time consuming and at each step it generates candidate item set. So for large databases it takes lots of space to store candidate item set. The defined algorithm scans the database at the start only once and then makes the undirected item set graph. From this graph by considering minimum support it finds the frequent item set and by considering the minimum confidence it generates the association rule. If database and minimum support is changed, the new algorithm finds the new frequent items by scanning undirected item set graph. That is why it’s executing efficiency is improved distinctly compared to traditional algorithm.

  10. Market Basket Analysis for a Supermarket based on Frequent Itemset Mining

    Directory of Open Access Journals (Sweden)

    Loraine Charlet Annie M.C.

    2012-09-01

    Full Text Available Market basket analysis is an important component of analytical system in retail organizations to determine the placement of goods, designing sales promotions for different segments of customers to improve customer satisfaction and hence the profit of the supermarket. These issues for a leading supermarket are addressed here using frequent itemset mining. The frequent itemsets are mined from the market basket database using the efficient K-Apriori algorithm and then the association rules are generated.

  11. Predictors of frequent visits to a psychiatric emergency room

    DEFF Research Database (Denmark)

    Aagaard, Jørgen; Aagaard, Andreas; Buus, Niels

    2014-01-01

    BACKGROUND: The role of the psychiatric emergency services has undergone extensive changes following a significant downsizing of the number of psychiatric hospital beds during the past decades. A relatively small number of "frequent visitors" accounts for a disproportionately large amount of visi...... deinstitutionalising of the Danish mental health services and a radical health care reform. A basic multiplicative model was designed for the early detection of individual frequent visitors....

  12. Digital equity in education: A Multilevel examination of differences in and relationships between computer access, computer use and state-level technology policies.

    Directory of Open Access Journals (Sweden)

    Jonathan D. Becker

    2007-02-01

    Full Text Available Using data from the National Assessment of Educational Progress (NAEP state assessment and a survey of state-level technology policies, this study examined digital equity in education as a multilevel organizational phenomenon with data from 70,382 students in 3,479 schools and 40 states. Students in rural schools or schools with higher percentages of African American students were likely to have less access to computers. With respect to computer use, girls and students eligible for free or reduced-price lunch were more likely to use computers more frequently when computers are available in the classroom. With respect to relationships between computer access and computer use, having computers available in a lab increases the likelihood of higher levels of computer use. The results suggested that no more than 5% of the variance in computer access can be attributed to state factors, and less than 1% of the variance in computer use was between states. The findings suggested that where student technology standards are integrated into subject-area standards, computer use was likely lower than in other states. In states where pre-service teachers must meet technology-related requirements to receive their teaching credential and states where funds earmarked for technology are distributed as competitive grants, computer use was likely to be higher.

  13. Dynamics of Selected Bioactive Substances Changes in Cucurbita Moschata Duch. Ex Poir. After Storage and Different Methods of Technological Processing

    Directory of Open Access Journals (Sweden)

    Alena Andrejiová

    2016-01-01

    Full Text Available The winter squash is an important source of antioxidants, especially carotenoids. The aim of submitted research work was to determine the effect of genotype, storage and different methods of technological processing (baking, boiling and sterilization on the content of ascorbic acid and total carotenoids in fruits of winter squash (Cucurbita moschata Duch. ex Poir.. The small-plot field experiment was established at Slovak University of Agriculture in Nitra in 2013. Five cultivars of winter squash (‘Liscia’, ‘Orange’, ‘Hannah’, ‘UG 205 F1’ and ‘Waltham’ were examined in experiment. The total carotenoids content in the pulp of fresh fruits was ranged from 9.33 to 15.10 mg.100 g−1. Its highest value was determined in case of ‘Orange’ variety. The storage and the thermal treatment of fruit pulp in case of baking had positive impact from the total carotenoid content point of view. The baking resulted in the increase of its value in winter squash. On the contrary, sterilization tended to the decrease of total carotenoid content in edible part of squash. The total carotenoids content in the baking pulp was ranged from 14.27 to 31.87 mg.100 g−1. The vitamin C content before storage and technological processing ranged in interval from 13.88 to 18.69 mg.100 g−1. Particular thermal methods of processing and storage resulted in decrease of vitamin C content in the pulp of all winter squash varieties.

  14. Science, Technology, Engineering and Math Readiness: Ethno-linguistic and gender differences in high-school course selection patterns

    Science.gov (United States)

    Adamuti-Trache, Maria; Sweet, Robert

    2014-03-01

    The study examines science-related course choices of high-school students in the culturally diverse schools of the province of British Columbia, Canada. The analysis employs K-12 provincial data and includes over 44,000 students born in 1990 who graduated from high school by 2009. The research sample reflects the presence of about 27% of students for whom English is not a first language. We construct an empirical model that examines ethno-linguistic and gender differences in Grade 12 course choices while accounting for personal and situational differences among students. The study employs a course selection typology that emphasizes readiness for science, technology, engineering and math fields of study. Findings indicate that math- and science-related course selection patterns are strongly associated with ethnicity, qualified not only by gender and prior math and science achievement but also by the individual's grade level at entry to the system and enrollment in English as a Second Language program. Students who are more likely to engage in math and science courses belong to Asian ethno-linguistic groups and entered the provincial school system during the senior high-school years. We suggest that ethnic diversity and broader academic exposure may play a crucial role in changing the gender composition of science classrooms, university fields of study and science-related occupations.

  15. Effects of Different Multimedia Presentations on Viewers' Information-Processing Activities Measured by Eye-Tracking Technology

    Science.gov (United States)

    Chuang, Hsueh-Hua; Liu, Han-Chin

    2011-05-01

    This study implemented eye-tracking technology to understand the impact of different multimedia instructional materials, i.e., five successive pages versus a single page with the same amount of information, on information-processing activities in 21 non-science-major college students. The findings showed that students demonstrated the same number of eye fixations during information searching and spent the same amount of time on the overall instructional materials regardless of format. However, the total number of eye fixations on the picture areas was significantly greater for the multiple-page than for the single-page presentation. A significant difference was found in the duration of students' eye fixation durations on the picture areas under the two conditions, with students spending more time on the picture area of the multiple-page than of the single-page presentation. Greater pupil size was found when participants viewed the multiple-page presentation, implying that this presentation format was associated with a higher cognitive load. The participants' eye-movement data for specific areas was recorded and analyzed to determine students' information processing patterns and strategies and for triangulation with the quantitative findings. Discussion of the research findings and suggestions for future research are provided.

  16. Study on different technology of fucoidan%褐藻糖胶不同干燥方法的研究

    Institute of Scientific and Technical Information of China (English)

    杨波; 刘宝林; 张淑平; 王旭; 黄伟刚

    2011-01-01

    Fucoidan crude extract as raw material,three different techniques such as hot-air drying,vacuum drying and freeze-drying were discussed in this experiment. The drying rate of hot-air drying and vacuum drying were tested, the technology paremeter of freeze- drying was obtained. The content of sugar in fucoidan and characteristics of the dried sample by different drying techniques were analyzed. The results showed that the sugar content of the dried sample by freeze-drying was better than that by hot-air drying and vacuum drying ,the quality of sample was better preserved. But the time was extend and energy consumption was added in process of freeze - drying.%以褐藻糖胶沉淀为原料,采用热风干燥、真空干燥和冷冻干燥三种工艺,研究真空干燥和热风干燥的干燥速率曲线,冷冻干燥过程的工艺参数;分析了样品干燥后褐藻糖胶含量以及物理特征的变化.结果表明,冷冻干燥较真空干燥和热风干燥得到的产品性能好,并较好地保持样品理化性质,但冷冻干燥过程费时长,耗能多.

  17. Incremental Mining for Regular Frequent Patterns in Vertical Format

    Directory of Open Access Journals (Sweden)

    Vijay Kumar G

    2013-04-01

    Full Text Available In the real world database updates continuously in several online applications like super market, network monitoring, web administration, stock market etc. Frequent pattern mining is afundamental and essential area in data mining research. Not only occurrence frequency of a pattern but also occurrence behaviour of a pattern may be treated as important criteria to measure the interestingness of a pattern. A frequent pattern is said to be regular frequent if the occurrence behaviour is less than or equal to the user given regularity threshold. In incremental transactional databases the occurrence frequency and the occurrence behaviour of a pattern changes whenever a small set of new transactions are added to the database. It is undesirable to mine regular frequent patterns from the scratch. Thus proposes a new algorithm called RFPID (Regular Frequent Pattern Mining in Incremental Databases to mine regular frequent patterns in incremental transactional databases using vertical data format which requires only one database scan. The experimental results show our algorithm is efficient in both memory utilization and execution.

  18. Maintaining Discovered Frequent Itemsets: Cases for Changeable Database and Support

    Institute of Scientific and Technical Information of China (English)

    DU XiaoPing(杜孝平); TANG ShiWei(唐世渭); Akifumi Makinouchi(牧之内顕文)

    2003-01-01

    Mining frequent itemsets from large databases has played an essential role inmany data mining tasks. It is also important to maintain the discovered frequent itemsets forthese data mining tasks when the database is updated. All algorithms proposed so far for the maintenance of discovered frequent itemsets are only performed with a fixed minimum support,which is the same as that used to obtain the discovered frequent itemsets. That is, users cannot change the minimum support even if the new results are unsatisfactory to the users. In thispaper two new complementary algorithms, FMP (First Maintaining Process) and RMP (Repeated Maintaining Process), are proposed to maintain discovered frequent itemsets in the case that new transaction data are added to a transaction database. Both algorithms allow users to change theminimum support for the maintenance processes. FMP is used for the first maintaining process, andwhen the result derived from the FMP is unsatisfactory, RMP will be performed repeatedly untilsatisfactory results are obtained. The proposed algorithms re-use the previous results to cut downthe cost of maintenance. Extensive experiments have been conducted to assess the performance of the algorithms. The experimental results show that the proposed algorithms are very resultful compared with the previous mining and maintenance algorithms for maintenance of discovered frequent itemsets.

  19. Mining Maximal Frequent Patterns in a Unidirectional FP-tree

    Institute of Scientific and Technical Information of China (English)

    SONG Jing-jing; LIU Rui-xin; WANG Yan; JIANG Bao-qing

    2006-01-01

    Becausemining complete set of frequent patterns from dense database could be impractical, an interesting alternative has been proposed recently. Instead of mining the complete set of frequent patterns, the new model only finds out the maximal frequent patterns, which can generate all frequent patterns. FP-growth algorithm is one of the most efficient frequent-pattern mining methods published so far. However,because FP-tree and conditional FP-trees must be two-way traversable, a great deal memory is needed in process of mining. This paper proposes an efficient algorithm Unid_FP-Max for mining maximal frequent patterns based on unidirectional FP-tree. Because of generation method of unidirectional FP-tree and conditional unidirectional FP-trees, the algorithm reduces the space consumption to the fullest extent. With the development of two techniques:single path pruning and header table pruning which can cut down many conditional unidirectional FP-trees generated recursively in mining process, Unid_ FP-Max further lowers the expense of time and space.

  20. Perceived quality of social relations and frequent drunkenness: a cross-sectional study of Spanish adolescents.

    Science.gov (United States)

    Kjærulff, Thora M; Rivera, Francisco; Jiménez-Iglesias, Antonia; Moreno, Carmen

    2014-01-01

    The aim of the study was to examine, for female and male students separately, whether perceived quality of relationships with peers and parents and relations in school predict self-reported frequent drunkenness among Spanish adolescents. The Spanish data from the Health Behaviour in School-aged Children Study (HBSC) 2010 survey were used including 1177 female and 1126 male students aged between 15 and 16 years. For both genders, students reporting low school satisfaction had increased odds of frequent drunkenness. Among females, low and medium levels of classmate support were associated with decreased odds of frequent drunkenness, whereas low perceived maternal knowledge as well as medium and low satisfaction with the family increased odds of being frequently drunk. The proportion of male students reporting medium satisfaction with friendships had significantly lower odds of frequent drunkenness compared with those with high level of satisfaction with friendships. We found different associations between perceived quality of social relations and frequent drunkenness among male and female students. Results showed that social relations seemed to better predictors of frequent drunkenness among female than male students and that other factors than social relations may contribute to explain excessive alcohol use among Spanish adolescents. © The Author 2014. Medical Council on Alcohol and Oxford University Press. All rights reserved.

  1. Understanding the differences in molecular conformation of carbohydrate and protein in endosperm tissues of grains with different biodegradation kinetics using advanced synchrotron technology

    Science.gov (United States)

    Yu, P.; Block, H. C.; Doiron, K.

    2009-01-01

    Conventional "wet" chemical analyses rely heavily on the use of harsh chemicals and derivatization, thereby altering native seed structures leaving them unable to detect any original inherent structures within an intact tissue sample. A synchrotron is a giant particle accelerator that turns electrons into light (million times brighter than sunlight) which can be used to study the structure of materials at the molecular level. Synchrotron radiation-based Fourier transform IR microspectroscopy (SR-FTIRM) has been developed as a rapid, direct, non-destructive and bioanalytical technique. This technique, taking advantage of the brightness of synchrotron light and a small effective source size, is capable of exploring the molecular chemistry within the microstructures of a biological tissue without the destruction of inherent structures at ultraspatial resolutions within cellular dimensions. This is in contrast to traditional 'wet' chemical methods, which, during processing for analysis, often result in the destruction of the intrinsic structures of feeds. To date there has been very little application of this technique to the study of plant seed tissue in relation to nutrient utilization. The objective of this study was to use novel synchrotron radiation-based technology (SR-FTIRM) to identify the differences in the molecular chemistry and conformation of carbohydrate and protein in various plant seed endosperms within intact tissues at cellular and subcellular level from grains with different biodegradation kinetics. Barley grain (cv. Harrington) with a high rate (31.3%/h) and extent (78%), corn grain (cv. Pioneer) with a low rate (9.6%/h) and extent of (57%), and wheat grain (cv. AC Barrie) with an intermediate rate (23%/h) and extent (72%) of ruminal DM degradation were selected for evaluation. SR-FTIRM evaluations were performed at the National Synchrotron Light Source at the Brookhaven National Laboratory (Brookhaven, NY). The molecular structure spectral analysis

  2. An implicit test of UX: individuals differ in what they associate with computers

    NARCIS (Netherlands)

    Schmettow, M.; Noordzij, M.L.; Mundt, M.

    2013-01-01

    User experience research has made considerable progress in understanding subjective experience with interactive technology. Nevertheless, we argue, some blind spots have remained: individual differences are frequently ignored, the prevalent measures of self-report rarely undergo verification, and ov

  3. A multi-criteria ranking of different technologies for the anaerobic digestion for energy recovery of the organic fraction of municipal solid wastes.

    Science.gov (United States)

    Karagiannidis, A; Perkoulidis, G

    2009-04-01

    This paper describes a conceptual framework and methodological tool developed for the evaluation of different anaerobic digestion technologies suitable for treating the organic fraction of municipal solid waste, by introducing the multi-criteria decision support method Electre III and demonstrating its related applicability via a test application. Several anaerobic digestion technologies have been proposed over the last years; when compared to biogas recovery from landfills, their advantage is the stability in biogas production and the stabilization of waste prior to final disposal. Anaerobic digestion technologies also show great adaptability to a broad spectrum of different input material beside the organic fraction of municipal solid waste (e.g. agricultural and animal wastes, sewage sludge) and can also be used in remote and isolated communities, either stand-alone or in conjunction to other renewable energy sources. Main driver for this work was the preliminary screening of such methods for potential application in Hellenic islands in the municipal solid waste management sector. Anaerobic digestion technologies follow different approaches to the anaerobic digestion process and also can include production of compost. In the presented multi-criteria analysis exercise, Electre III is implemented for comparing and ranking 5 selected alternative anaerobic digestion technologies. The results of a performed sensitivity analysis are then discussed. In conclusion, the performed multi-criteria approach was found to be a practical and feasible method for the integrated assessment and ranking of anaerobic digestion technologies by also considering different viewpoints and other uncertainties of the decision-making process.

  4. AN ENHANCED FREQUENT PATTERN GROWTH BASED ON MAPREDUCE FOR MINING ASSOCIATION RULES

    Directory of Open Access Journals (Sweden)

    ARKAN A. G. AL-HAMODI

    2016-03-01

    Full Text Available In mining frequent itemsets, one of most important algorithm is FP-growth. FP-growth proposes an algorithm to compress information needed for mining frequent itemsets in FP-tree and recursively constructs FP-trees to find all frequent itemsets. In this paper, we propose the EFP-growth (enhanced FPgrowth algorithm to achieve the quality of FP-growth. Our proposed method implemented the EFPGrowth based on MapReduce framework using Hadoop approach. New method has high achieving performance compared with the basic FP-Growth. The EFP-growth it can work with the large datasets to discovery frequent patterns in a transaction database. Based on our method, the execution time under different minimum supports is decreased..

  5. Probabilistic Frequent Pattern Growth for Itemset Mining in Uncertain Databases (Technical Report)

    CERN Document Server

    Bernecker, Thomas; Renz, Matthias; Verhein, Florian; Züfle, Andreas

    2010-01-01

    Frequent itemset mining in uncertain transaction databases semantically and computationally differs from traditional techniques applied on standard (certain) transaction databases. Uncertain transaction databases consist of sets of existentially uncertain items. The uncertainty of items in transactions makes traditional techniques inapplicable. In this paper, we tackle the problem of finding probabilistic frequent itemsets based on possible world semantics. In this context, an itemset X is called frequent if the probability that X occurs in at least minSup transactions is above a given threshold. We make the following contributions: We propose the first probabilistic FP-Growth algorithm (ProFP-Growth) and associated probabilistic FP-Tree (ProFP-Tree), which we use to mine all probabilistic frequent itemsets in uncertain transaction databases without candidate generation. In addition, we propose an efficient technique to compute the support probability distribution of an itemset in linear time using the concep...

  6. Mining Frequent Generalized Itemsets and Generalized Association Rules Without Redundancy

    Institute of Scientific and Technical Information of China (English)

    Daniel Kunkle; Donghui Zhang; Gene Cooperman

    2008-01-01

    This paper presents some new algorithms to efficiently mine max frequent generalized itemsets (g-itemsets) and essential generalized association rules (g-rules). These are compact and general representations for all frequent patterns and all strong association rules in the generalized environment. Our results fill an important gap among algorithms for frequent patterns and association rules by combining two concepts. First, generalized itemsets employ a taxonomy of items, rather than a fiat list of items. This produces more natural frequent itemsets and associations such as (meat, milk) instead of (beef, milk), (chicken, milk), etc. Second, compact representations of frequent itemsets and strong rules, whose result size is exponentially smaller, can solve a standard dilemma in mining patterns: with small threshold values for support and confidence, the user is overwhelmed by the extraordinary number of identified patterns and associations; but with large threshold values, some interesting patterns and associations fail to be identified. Our algorithms can also expand those max frequent g-itemsets and essential g-rules into the much larger set of ordinary frequent g-itemsets and strong g-rules. While that expansion is not recommended in most practical cases, we do so in order to present a comparison with existing algorithms that only handle ordinary frequent g-itemsets. In this case, the new algorithm is shown to be thousands, and in some cases millions, of the time faster than previous algorithms. Further, the new algorithm succeeds in analyzing deeper taxonomies, with the depths of seven or more. Experimental results for previous algorithms limited themselves to taxonomies with depth at most three or four. In each of the two problems, a straightforward lattice-based approach is briefly discussed and then a classificationbased algorithm is developed. In particular, the two classification-based algorithms are MFGI_class for mining max frequent g-itemsets and EGR

  7. Efficient Incremental Maintenance of Frequent Patterns with FP-Tree

    Institute of Scientific and Technical Information of China (English)

    Xiu-Li Ma; Yun-Hai Tong; Shi-Wei Tang; Dong-Qing Yang

    2004-01-01

    Mining frequent patterns has been studied popularly in data mining area. However, little work has been done on mining patterns when the database has an influx of fresh data constantly. In these dynamic scenarios, efficient maintenance of the discovered patterns is crucial. Most existing methods need to scan the entire database repeatedly, which is an obvious disadvantage. In this paper, an efficient incremental mining algorithm, Incremental-Mining (IM), is proposed for maintenance of the frequent patterns when new incremental data come. Based on the frequent pattern tree (FP-tree) structure, IM gives a way to make the most of the things from the previous mining process, and requires scanning the original data once at most. Furthermore, IM can identify directly the differential set of frequent patterns, which may be more informative to users. Moreover, IM can deal with changing thresholds as well as changing data, thus provide a full maintenance scheme. IM has been implemented and the performance study shows it outperforms three other incremental algorithms: FUP, DB-tree and re-running frequent pattern growth (FP-growth).

  8. Microstructures and properties of low-melting-point Al-Cu-Si filler metals prepared by different technologies

    Institute of Scientific and Technical Information of China (English)

    Wang Zehua; Feng Hua; Jiang Shaoqun; Zhou Zehua

    2010-01-01

    The Al25Cu6. 5Si0. 09RE (RE = La and Ce) and Al25Cu10.5Si2Ni filler metals were prepared by common metal mold casting, copper plate chilling and rapid solidification, respectively. The microstructures and properties of these filler metals were studied. The results show that the as-casting and the corresponding rapid solidification filler metals have the same phases but their microstructures are different. The microstructure of rapid solidification filler metals consults of an a-Al solid solution, the 6 (Al2Cu) intermetallic compound and an Al-Cu-Si eutectk phase. Compared with the as-casting filler metal, the melting temperature ranges (△T) of the corresponding copper plate chilling and rapid solidification filler metals decrease and their wettabilities are improved because of the grain refinement and the improvement of composition uniformity. The wetting area of Al25Cu6.5Si0.09RE rapid solidification filler metal doubles that of the corresponding as-casting filler metal. It is hopeful that the properties of Al-Cu-Si filler metals will be improved by changing preparation technology.

  9. Determination of Efficiency of Hybrid Photovoltaic Thermal Air Collectors Using Artificial Neural Network Approach for Different PV Technology

    Directory of Open Access Journals (Sweden)

    G. N. Tiwari

    2012-01-01

    Full Text Available In this paper an attempt has been made to determine efficiency of semi transparent hybrid photovoltaic thermal double pass air collector for different PV technology and compare it with single pass air collector using artificial neural network (ANN technique for New Delhi weather station of India. The MATLAB 7.1 neural networks toolbox has been used for defining and training of ANN for determination of thermal, electrical, overall thermal and overall exergy efficiency of the system. The ANN model uses ambient air temperature, number of sunshine hours, number of clear days, temperature coefficient, cell efficiency, global and diffuse radiation as input parameters. The transfer function, neural network configuration and learning parameters have been selected based on highest convergence during training and testing of network. About 2000 sets of data from four weather stations (Bangalore, Mumbai, Srinagar and Jodhpur have been given as input for training and data of the fifth weather station (New Delhi has been used for testing purpose. It has been observed that the best transfer function for a given configuration is logsig. The feed forward back-propagation algorithm has been used in this analysis. Further the results of ANN model have been compared with analytical values on the basis of root mean square error.

  10. Environmental impact of submerged anaerobic MBR (SAnMBR) technology used to treat urban wastewater at different temperatures.

    Science.gov (United States)

    Pretel, R; Robles, A; Ruano, M V; Seco, A; Ferrer, J

    2013-12-01

    The objective of this study was to assess the environmental impact of a submerged anaerobic MBR (SAnMBR) system in the treatment of urban wastewater at different temperatures: ambient temperature (20 and 33°C), and a controlled temperature (33°C). To this end, an overall energy balance (OEB) and life cycle assessment (LCA), both based on real process data, were carried out. Four factors were considered in this study: (1) energy consumption during wastewater treatment; (2) energy recovered from biogas capture; (3) potential recovery of nutrients from the final effluent; and (4) sludge disposal. The OEB and LCA showed SAnMBR to be a promising technology for treating urban wastewater at ambient temperature (OEB=0.19 kW h m(-3)). LCA results reinforce the importance of maximising the recovery of nutrients (environmental impact in eutrophication can be reduced up to 45%) and dissolved methane (positive environmental impact can be obtained) from SAnMBR effluent. Copyright © 2013 Elsevier Ltd. All rights reserved.

  11. Technology Adoption and Productivity Difference among Growers of New Rice for Africa in Savanna Zone of Nigeria

    Directory of Open Access Journals (Sweden)

    Rahji, MAY.

    2009-01-01

    Full Text Available The use of New Rice for Africa (NERICA and complementary rice production technology is being promoted by Nigeria government in order to increase productivity of upland rice farming. This study examines the levels, determinants and effects of complementary technology adoption on productivity of NERICA rice farming. Data for the study were obtained from sample survey of 227 NERICA rice farmers in the guinea savanna zone using multistage sampling technique. Data collected were analyzed using Tobit regression model and Cobb-Douglas production function. Results showed that the average technology score was 52.1 percent (+ 0.242. Fifty-five percent of the farmers who scored above the mean were categorized as low technology users. Tobit regression estimation shows that farmers' technology score was affected significantly (P< 0.05 by farmer's level of education (0.0127, extension visit (0.0145, farming experience (0.0085, land ownership status (0.0687, credit use (0.0698 and level of rice commercialization (0.3783. Cobb-Douglas production estimation shows a neutrally outward shift in production function as the level of complementary technology increases, indicating increasing productivity. Thus, promotion of complementary technology in NERICA rice production is a worthwhile effort and should continue to be funded. Improvement of those factors that significantly affect adoption of complementary technology is recommended.

  12. Extracting Frequent Connected Subgraphs from Large Graph Sets

    Institute of Scientific and Technical Information of China (English)

    Wei Wang; Qing-Qing Yuan; Hao-Feng Zhou; Ming-Sheng Hong; Bai-Le Shi

    2004-01-01

    Mining frequent patterns from datasets is one of the key success of data mining research. Currently, most of the studies focus on the data sets in which the elements are independent, such as the items in the marketing basket.. However, the objects in the real world often have close relationship with each other. How to extract frequent patterns from these relations is the objective of this paper. The authors use graphs to model the relations, and select a simple type for analysis. Combining the graph theory and algorithms to generate frequent patterns, a new algorithm called Topology, which can mine these graphs efficiently, has been proposed. The performance of the algorithm is evaluated by doing experiments with synthetic datasets and real data. The experimental results show that Topology can do the job well. At the end of this paper, the potential improvement is mentioned.

  13. Social environment and frequent attendance in Danish general practice

    DEFF Research Database (Denmark)

    Vedsted, Peter; Olesen, Frede

    2005-01-01

    inequalities in health or whether social factors in themselves determine the use of general practice. AIM: To examine if social factors are associated with frequent attendance in general practice after adjusting for physical and psychological health variables. DESIGN OF STUDY: Population-based cross...... during the period November 1997-October 1998. A questionnaire about physical, psychological and social factors was sent to the patients. The associations between social factors and frequent attendance were adjusted for physical and psychological health and tendency towards somatisation. RESULTS: A total...

  14. Examination of Operation Quality for High-frequent Railway Operation

    DEFF Research Database (Denmark)

    Landex, Alex; Kaas, Anders H.

    2009-01-01

    The examination of operation quality for high-frequent operation requires other approaches than the typical evaluation of punctuality (trains on time) and reliability (operated trains). This is because passengers in high-frequent railway systems do not necessarily notice train delays as they just...... measurement. However, if an even more accurate measurement is wanted, the article recommends using the passenger delay approach. For the passenger delay approach, the article recommends using a 3rd generation passenger delay model since it is the most accurate type of model and it can be combined with railway...

  15. An Efficient Hybrid Algorithm for Mining Web Frequent Access Patterns

    Institute of Scientific and Technical Information of China (English)

    ZHAN Li-qiang; LIU Da-xin

    2004-01-01

    We propose an efficient hybrid algorithm WDHP in this paper for mining frequent access patterns.WDHP adopts the techniques of DHP to optimize its performance, which is using hash table to filter candidate set and trimming database.Whenever the database is trimmed to a size less than a specified threshold, the algorithm puts the database into main memory by constructing a tree, and finds frequent patterns on the tree.The experiment shows that WDHP outperform algorithm DHP and main memory based algorithm WAP in execution efficiency.

  16. Mining Frequent Itemsets from Online Data Streams: Comparative Study

    Directory of Open Access Journals (Sweden)

    HebaTallah Mohamed Nabil

    2013-08-01

    Full Text Available Online mining of data streams poses many new challenges more than mining static databases. In addition to the one-scan nature, the unbounded memory requirement, the high data arrival rate of data streams and the combinatorial explosion of itemsets exacerbate the mining task. The high complexity of the frequent itemsets mining problem hinders the application of the stream mining techniques. In this review, we present a comparative study among almost all, as we are acquainted, the algorithms for mining frequent itemsets from online data streams. All those techniques immolate with the accuracy of the results due to the relatively limited storage, leading, at all times, to approximated results.

  17. Frequent rhabdomyolysis in anti-NMDA receptor encephalitis.

    Science.gov (United States)

    Lim, Jung-Ah; Lee, Soon-Tae; Kim, Tae-Joon; Moon, Jangsup; Sunwoo, Jun-Sang; Byun, Jung-Ick; Jung, Keun-Hwa; Jung, Ki-Young; Chu, Kon; Lee, Sang Kun

    2016-09-15

    The aim of this study was to analyze the clinical presentation and provocation factors of rhabdomyolysis in anti-NMDAR encephalitis. Among the 16 patients with anti-NMDAR encephalitis in our institutional cohort, nine patients had elevated CK enzyme levels and clinical evidence of rhabdomyolysis. Rhabdomyolysis was more frequent after immunotherapy. The use of dopamine receptor blocker (DRB) increased the risk of rhabdomyolysis. None of the patients without rhabdomyolysis received DRBs. Rhabdomyolysis is a frequent complication in anti-NMDAR encephalitis and more common after immunotherapy and the use of DRBs increases the risk. Therefore, DRBs should be administered carefully in patients with anti-NMDAR encephalitis.

  18. Global hepatic gene expression in rainbow trout exposed to sewage effluents: A comparison of different sewage treatment technologies

    Energy Technology Data Exchange (ETDEWEB)

    Cuklev, Filip, E-mail: filip.cuklev@neuro.gu.se [Institute of Neuroscience and Physiology, Department of Physiology, The Sahlgrenska Academy at the University of Gothenburg, Box 434, SE-405 30 Goeteborg (Sweden); Gunnarsson, Lina, E-mail: lina.gunnarsson@fysiologi.gu.se [Institute of Neuroscience and Physiology, Department of Physiology, The Sahlgrenska Academy at the University of Gothenburg, Box 434, SE-405 30 Goeteborg (Sweden); Cvijovic, Marija, E-mail: marija.cvijovic@chalmers.se [Institute of Neuroscience and Physiology, Department of Physiology, The Sahlgrenska Academy at the University of Gothenburg, Box 434, SE-405 30 Goeteborg (Sweden); Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, SE-412 96 Goeteborg (Sweden); Kristiansson, Erik, E-mail: erik.kristiansson@chalmers.se [Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, SE-412 96 Goeteborg (Sweden); Rutgersson, Carolin [Institute of Neuroscience and Physiology, Department of Physiology, The Sahlgrenska Academy at the University of Gothenburg, Box 434, SE-405 30 Goeteborg (Sweden); Bjoerlenius, Berndt, E-mail: berndtb@kth.se [Stockholm Water Company, Vaermdoevaegen 23, SE-131 55 Stockholm (Sweden); Larsson, D.G. Joakim, E-mail: joakim.larsson@fysiologi.gu.se [Institute of Neuroscience and Physiology, Department of Physiology, The Sahlgrenska Academy at the University of Gothenburg, Box 434, SE-405 30 Goeteborg (Sweden)

    2012-06-15

    Effluents from sewage treatment plants contain a mixture of micropollutants with the potential of harming aquatic organisms. Thus, addition of advanced treatment techniques to complement existing conventional methods has been proposed. Some of the advanced techniques could, however, potentially produce additional compounds affecting exposed organisms by unknown modes of action. In the present study the aim was to improve our understanding of how exposure to different sewage effluents affects fish. This was achieved by explorative microarray and quantitative PCR analyses of hepatic gene expression, as well as relative organ sizes of rainbow trout exposed to different sewage effluents (conventionally treated, granular activated carbon, ozonation (5 or 15 mg/L), 5 mg/L ozone plus a moving bed biofilm reactor, or UV-light treatment in combination with hydrogen peroxide). Exposure to the conventionally treated effluent caused a significant increase in liver and heart somatic indexes, an effect removed by all other treatments. Genes connected to xenobiotic metabolism, including cytochrome p450 1A, were differentially expressed in the fish exposed to the conventionally treated effluents, though only effluent treatment with granular activated carbon or ozone at 15 mg/L completely removed this response. The mRNA expression of heat shock protein 70 kDa was induced in all three groups exposed to ozone-treated effluents, suggesting some form of added stress in these fish. The induction of estrogen-responsive genes in the fish exposed to the conventionally treated effluent was effectively reduced by all investigated advanced treatment technologies, although the moving bed biofilm reactor was least efficient. Taken together, granular activated carbon showed the highest potential of reducing responses in fish induced by exposure to sewage effluents. - Highlights: Black-Right-Pointing-Pointer Livers of trout exposed to different sewage effluents were analysed by microarray. Black

  19. A different interpretation of science-society relations: the socialization of scientific and technological research (Italian original version

    Directory of Open Access Journals (Sweden)

    Luciano d'Andrea

    2009-09-01

    Full Text Available Recent data delivered by Eurobarometer show how Europeans tend not to perceive science and technology as important factors for the Europe’s future. While showing the scarce development of scientific culture in Europe, these data allow to understand how science and technology are exposed to risk of social marginalization, notwithstanding the results they are attaining. In order to interpret this quite contradictory picture, an analytical framework revolving around the notion of “science and technology socialization” is proposed and developed. Implications of such an approach on research policies, on citizens’ participation and on the role of social sciences are also briefly examined.

  20. Targeted next generation sequencing of mucosal melanomas identifies frequent NF1 and RAS mutations.

    Science.gov (United States)

    Cosgarea, Ioana; Ugurel, Selma; Sucker, Antje; Livingstone, Elisabeth; Zimmer, Lisa; Ziemer, Mirjana; Utikal, Jochen; Mohr, Peter; Pfeiffer, Christiane; Pföhler, Claudia; Hillen, Uwe; Horn, Susanne; Schadendorf, Dirk; Griewank, Klaus G; Roesch, Alexander

    2017-06-20

    Mucosal melanoma represents ~1% of all melanomas, frequently having a poor prognosis due to diagnosis at a late stage of disease. Mucosal melanoma differs from cutaneous melanoma not only in terms of poorer clinical outcome but also on the molecular level having e.g. less BRAF and more frequent KIT mutations than cutaneous melanomas. For the majority of mucosal melanomas oncogenic driver mutations remain unknown. In our study, 75 tumor tissues from patients diagnosed with mucosal melanoma were analyzed, applying a targeted next generation sequencing panel covering 29 known recurrently mutated genes in melanoma. NF1 and RAS mutations were identified as the most frequently mutated genes occurring in 18.3% and 16.9% of samples, respectively. Mutations in BRAF were identified in 8.4% and KIT in 7.0% of tumor samples. Our study identifies NF1 as the most frequently occurring driver mutation in mucosal melanoma. RAS alterations, consisting of NRAS and KRAS mutations, were the second most frequent mutation type. BRAF and KIT mutations were rare with frequencies below 10% each. Our data indicate that in mucosal melanomas RAS/NF1 alterations are frequent, implying a significant pathogenetic role for MAPK and potentially PI3K pathway activation in these tumors.

  1. Frequent manual repositioning and incidence of pressure ulcers among bed-bound elderly hip fracture patients.

    Science.gov (United States)

    Rich, Shayna E; Margolis, David; Shardell, Michelle; Hawkes, William G; Miller, Ram R; Amr, Sania; Baumgarten, Mona

    2011-01-01

    Frequent manual repositioning is an established part of pressure ulcer prevention, but there is little evidence for its effectiveness. This study examined the association between repositioning and pressure ulcer incidence among bed-bound elderly hip fracture patients, using data from a 2004-2007 cohort study in nine Maryland and Pennsylvania hospitals. Eligible patients (n=269) were age ≥ 65 years, underwent hip fracture surgery, and were bed-bound at index study visits (during the first 5 days of hospitalization). Information about repositioning on the days of index visits was collected from patient charts; study nurses assessed presence of stage 2+ pressure ulcers 2 days later. The association between frequent manual repositioning and pressure ulcer incidence was estimated, adjusting for pressure ulcer risk factors using generalized estimating equations and weighted estimating equations. Patients were frequently repositioned (at least every 2 hours) on only 53% (187/354) of index visit days. New pressure ulcers developed at 12% of visits following frequent repositioning vs. 10% following less frequent repositioning; the incidence rate of pressure ulcers per person-day did not differ between the two groups (incidence rate ratio 1.1, 95% confidence interval 0.5-2.4). No association was found between frequent repositioning of bed-bound patients and lower pressure ulcer incidence, calling into question the allocation of resources for repositioning.

  2. Fraternity Membership & Frequent Drinking. NBER Working Paper No. 16291

    Science.gov (United States)

    DeSimone, Jeffrey S.

    2010-01-01

    Reinforcing earlier findings from other data, college senior fraternity/sorority members are more likely to consume alcohol frequently. Large reductions in estimates upon controlling for time spent partying, and to a lesser extent cigarette use and intramural sports involvement, suggest considerable unobserved heterogeneity in the relationship.…

  3. Hybrid Recommendation System Memanfaatkan Penggalian Frequent Itemset dan Perbandingan Keyword

    OpenAIRE

    Suka Parwita, Wayan Gede; Winarko, Edi

    2015-01-01

    AbstrakRecommendation system sering dibangun dengan memanfaatkan data peringkat item dan data identitas pengguna. Data peringkat item merupakan data yang langka pada sistem yang baru dibangun. Sedangkan, pemberian data identitas pada recommendation system dapat menimbulkan kekhawatiran penyalahgunaan data identitas.Hybrid recommendation system memanfaatkan algoritma penggalian frequent itemset dan perbandingan keyword dapat memberikan daftar rekomendasi tanpa menggunakan data identitas penggu...

  4. Competence-Based Education and Training– about Frequently Asked Questions

    NARCIS (Netherlands)

    Mulder, M.

    2012-01-01

    This article follows the author's previous piece on practical guidelines for the development of comprehensive competence-based education and training (Mulder, 2012). It is about the questions that have been and are still frequently asked in presentations, workshops and classes about the introduction

  5. Frequent Errors in Chinese EFL Learners' Topic-Based Writings

    Science.gov (United States)

    Zhan, Huifang

    2015-01-01

    This paper investigated a large number of errors found in the topic-based writings of Chinese EFL learners, especially provided an analysis on frequent errors, to find useful pedagogical implications for English grammar teaching and writing instruction in Chinese EFL setting. Students' topic-based writings were examined by the author. The findings…

  6. Injury patterns in children with frequent emergency department visits

    DEFF Research Database (Denmark)

    Laursen, B

    2006-01-01

    OBJECTIVES: To compare injury patterns in children with many and few emergency department (ED) visits in order to reveal the causes for the frequent visits. METHODS: Three cohorts of Danish children (total 579 721 children) were followed for three years when their ages were 0-2, 6-8, and 12...

  7. Ban the Book Report: Promoting Frequent and Enthusiastic Reading

    Science.gov (United States)

    Foster, Graham

    2012-01-01

    Teachers recognize that frequent independent reading increases student knowledge on a wide range of topics, enhances vocabulary, and improves comprehension. "Ban the Book Report" inspires teachers to go beyond narrow and analytical book reports by exploring the potential of book talks, alternate book covers, identifying features of informational…

  8. An Adaptive Algorithm for Finding Frequent Sets in Landmark Windows

    DEFF Research Database (Denmark)

    Dang, Xuan-Hong; Ong, Kok-Leong; Lee, Vincent

    2012-01-01

    We consider a CPU constrained environment for finding approximation of frequent sets in data streams using the landmark window. Our algorithm can detect overload situations, i.e., breaching the CPU capacity, and sheds data in the stream to “keep up”. This is done within a controlled error thresho...

  9. Most frequent location of the sentinel lymph nodes

    Directory of Open Access Journals (Sweden)

    Chiao Lo

    2014-07-01

    Conclusion: The area between these four landmarks is the most frequent location of the sentinel lymph node identified using the radioisotope method. We suggest that this area should be carefully evaluated preoperatively by ultrasound for appropriate surgical planning. A skin incision in this area is also recommended when sentinel lymph node dissection is guided by blue dye.

  10. Frequent visitors at the psychiatric emergency room - A literature review.

    Science.gov (United States)

    Schmidt, Manuela

    2017-03-29

    Frequent visitors at the psychiatric emergency room (PER) constitute a small subgroup of patients, yet they are responsible for a disproportionate number of visits and thus claim considerable resources. Their needs are often left unmet and their repetitive visits reflect their dissatisfaction as well as that of PERs' staff. Motivated by these dilemmas, this study systematically reviews the literature about frequent visitors at PER and seeks to answer two questions: What characterizes frequent visitors at PER in the literature? and What characterizes PER in the literature? Based on 29 studies, this paper offers answers to the two questions based on a strength weakness opportunities and threats (SWOT) analysis. The results of the review and subsequent analysis of the literature revealed the multiplicity and complexity of frequent visitors' characteristics and how they appear to converge. Commonalities were more difficult to identify in PER characteristics. In some cases, this happened because the characteristics were poorly described or were context specific. As a result, it was not easy to compare the studies on PER. Based on SWOT and the findings of the analysis, the paper proposes new venues of research and suggests how the field of mental health might develop by taking into account its opportunities and threats.

  11. GRAMI: Generalized Frequent Subgraph Mining in Large Graphs

    KAUST Repository

    El Saeedy, Mohammed El Sayed

    2011-07-24

    Mining frequent subgraphs is an important operation on graphs. Most existing work assumes a database of many small graphs, but modern applications, such as social networks, citation graphs or protein-protein interaction in bioinformatics, are modeled as a single large graph. Interesting interactions in such applications may be transitive (e.g., friend of a friend). Existing methods, however, search for frequent isomorphic (i.e., exact match) subgraphs and cannot discover many useful patterns. In this paper we propose GRAMI, a framework that generalizes frequent subgraph mining in a large single graph. GRAMI discovers frequent patterns. A pattern is a graph where edges are generalized to distance-constrained paths. Depending on the definition of the distance function, many instantiations of the framework are possible. Both directed and undirected graphs, as well as multiple labels per vertex, are supported. We developed an efficient implementation of the framework that models the frequency resolution phase as a constraint satisfaction problem, in order to avoid the costly enumeration of all instances of each pattern in the graph. We also implemented CGRAMI, a version that supports structural and semantic constraints; and AGRAMI, an approximate version that supports very large graphs. Our experiments on real data demonstrate that our framework is up to 3 orders of magnitude faster and discovers more interesting patterns than existing approaches.

  12. Does conditional approval for new oncology drugs in Europe lead to differences in health technology assessment decisions?

    NARCIS (Netherlands)

    Lipska, I; Hoekman, J; McAuslane, N; Leufkens, Hgm; Hövels, A M

    2015-01-01

    An early access pathway of conditional approval for potentially beneficial medicines is available within the European regulatory framework. However, marketing authorization does not necessarily result in recommendations for public funding by health technology assessment (HTA) agencies. As conditiona

  13. Understanding women's hesitancy to undergo less frequent cervical cancer screening.

    Science.gov (United States)

    Gerend, Mary A; Shepherd, Melissa A; Kaltz, Emily A; Davis, Whitney J; Shepherd, Janet E

    2017-02-01

    Inappropriate cervical cancer screening (e.g., screening too often) can result in unnecessary medical procedures, treatment, and psychological distress. To balance the benefits and harms, cervical cancer screening guidelines were recently modified in favor of less frequent screening (i.e., every 3 to 5 years). This study investigated women's acceptance of less frequent cervical cancer screening and their primary concerns about extending the screening interval beyond one year. A national sample of 376 U.S. women ages 21-65 completed an online survey in 2014. Predictors of willingness to get a Pap test every 3 to 5 years were identified using logistic regression. We also examined perceived consequences of less frequent screening. Over two thirds were willing to undergo less frequent screening if it was recommended by their healthcare provider. Nevertheless, nearly 20% expressed discomfort with less frequent screening and 45% were either in opposition or unsure whether they would be comfortable replacing Pap testing with primary HPV testing. Women whose most recent Pap test was (vs. was not) within the past year and women who ever (vs. never) had an abnormal Pap test were less willing to extend the screening interval. Additionally, women who typically saw an obstetrician/gynecologist or nurse practitioner for their Pap test (vs. a family physician) were less accepting of the guidelines. Hesitancy about the longer screening interval appears to stem from concern about developing cancer between screenings. Findings contribute to the growing body of research on cancer overscreening and may inform interventions for improving adherence to cancer screening guidelines.

  14. MedlinePlus Connect: Frequently Asked Questions (FAQs)

    Science.gov (United States)

    ... CMS programs requiring the use of certified EHR technology. The National Library of Medicine does not make or interpret CMS quality program ... Office of the National Coordinator for Health Information Technology (ONC) or contact ... National Library of Medicine, part of the National Institutes of Health, maintains ...

  15. Frequent users of emergency services: associated factors and reasons for seeking care

    Directory of Open Access Journals (Sweden)

    Aline Marques Acosta

    2015-04-01

    Full Text Available Aim: to identify the profile of frequent users of emergency services, to verify the associated factors and to analyze the reasons for the frequent use of the services. METHOD: An explanatory sequential type mixed method was adopted. Quantitative data were collected from the electronic medical records, with a sample of 385 users attended four or more times in an emergency service, during the year 2011. Qualitative data were collected through semi-structured interviews with 18 users, intentionally selected from the results of the quantitative stage. Quantitative data were analyzed using descriptive and inferential statistics and qualitative data using thematic analysis. RESULTS: It was found that 42.9% were elderly, 84.9% had chronic diseases, 63.5% were classified as urgent, 42.1% stayed for more than 24 hours in the service and 46.5% were discharged. Scheduled follow-up appointment, risk classification, length of stay and outcome were factors associated with frequent use. The reasons for seeking the services were mainly related to the exacerbation of chronic diseases, to easier access and concentration of technology, to the bond, and to the scheduled appointments. CONCLUSIONS: The results contribute to comprehending the repeated use of emergency services and provide additional data to plan alternatives to reduce frequent use.

  16. Analysis of illegal peptide biopharmaceuticals frequently encountered by controlling agencies.

    Science.gov (United States)

    Vanhee, Celine; Janvier, Steven; Desmedt, Bart; Moens, Goedele; Deconinck, Eric; De Beer, Jacques O; Courselle, Patricia

    2015-09-01

    Recent advances in genomics, recombinant expression technologies and peptide synthesis have led to an increased development of protein and peptide therapeutics. Unfortunately this goes hand in hand with a growing market of counterfeit and illegal biopharmaceuticals, including substances that are still under pre-clinical and clinical development. These counterfeit and illegal protein and peptide substances could imply severe health threats as has been demonstrated by numerous case reports. The Belgian Federal Agency for Medicines and Health Products (FAMHP) and customs are striving, together with their global counterparts, to curtail the trafficking and distributions of these substances. At their request, suspected protein and peptide preparations are analysed in our Official Medicines Control Laboratory (OMCL). It stands to reason that a general screening method would be beneficiary in the battle against counterfeit and illegal peptide drugs. In this paper we present such general screening method employing liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the identification of counterfeit and illegal injectable peptide preparations, extended with a subsequent quantification method using ultra-high performance liquid chromatography with diode array detection (UHPLC-DAD). The screening method, taking only 30 min, is able to selectively detect 25 different peptides and incorporates the proposed minimum of five identification points (IP) as has been recommended for sports drug testing applications. The group of peptides represent substances which have already been detected in illegal and counterfeit products seized by different European countries as well as some biopharmaceutical peptides which have not been confiscated yet by the controlling agencies, but are already being used according to the many internet users forums. Additionally, we also show that when applying the same LC gradient, it is also possible to quantify these peptides without the need for

  17. Extraction/oxidation kinetics of low molecular weight compounds in wine brandy resulting from different ageing technologies.

    Science.gov (United States)

    Canas, Sara; Caldeira, Ilda; Belchior, A Pedro

    2013-06-15

    This study provides innovative information on the influence of new technologies of ageing (stainless steel tanks with wood staves or wood tablets of chestnut or Limousin oak), in comparison with traditional technology (oak wooden barrels), on the extraction/oxidation kinetics of low molecular weight compounds of wine brandy. The brandy was sampled and analysed by HPLC during the first year of ageing. The results show that most of the compounds tend to increase over the time, but their extraction/oxidation kinetics depend on the ageing technology. The wooden barrels promote greater enrichment in the majority of the compounds. However, gallic acid, ellagic acid and syringaldehyde, and vanillin and 5-methylfurfural, which are strong antioxidants and key-odourant compounds, respectively, present higher contents in the brandy aged with the alternative technologies. Chestnut proves to be a suitable alternative to Limousin oak for the ageing of brandy in all the studied technologies, inducing faster evolution and high quality. Copyright © 2013 Elsevier Ltd. All rights reserved.

  18. Determinants of frequent attendance in Danish general practice

    DEFF Research Database (Denmark)

    Jørgensen, Jeanette Therming; Andersen, John Sahl; Tjønneland, Anne

    2016-01-01

    . below recommended level), and hormone therapy in women (1.52; 1.42-1.63) were all significant determinants of frequent attendance. CONCLUSIONS: In addition to pre-existing medical conditions, gender, socio-demographic and gender-specific factors, lifestyle (obesity, smoking, exercise and alcohol use.......57-0.69, >4 years higher education vs. no vocational training) and employment (0.61; 0.57-0.65) were inversely associated with frequent attendance. Finally, obesity (1.54; 1.14-2.08), smoking (1.21; 1.12-1.30, current vs. never), physical activity (0.84; 0.80-89), alcohol consumption (0.83; 0.78-0.87 above vs...

  19. Evidence for frequent incest in a cooperatively breeding mammal.

    Science.gov (United States)

    Nichols, H J; Cant, M A; Hoffman, J I; Sanderson, J L

    2014-12-01

    As breeding between relatives often results in inbreeding depression, inbreeding avoidance is widespread in the animal kingdom. However, inbreeding avoidance may entail fitness costs. For example, dispersal away from relatives may reduce survival. How these conflicting selection pressures are resolved is challenging to investigate, but theoretical models predict that inbreeding should occur frequently in some systems. Despite this, few studies have found evidence of regular incest in mammals, even in social species where relatives are spatio-temporally clustered and opportunities for inbreeding frequently arise. We used genetic parentage assignments together with relatedness data to quantify inbreeding rates in a wild population of banded mongooses, a cooperatively breeding carnivore. We show that females regularly conceive to close relatives, including fathers and brothers. We suggest that the costs of inbreeding avoidance may sometimes outweigh the benefits, even in cooperatively breeding species where strong within-group incest avoidance is considered to be the norm.

  20. Efficient Support Coupled Frequent Pattern Mining Over Progressive Databases

    CERN Document Server

    Keshavamurthy, B N; Toshniwal, Durga; 10.5121/ijdms.2010.2205

    2010-01-01

    There have been many recent studies on sequential pattern mining. The sequential pattern mining on progressive databases is relatively very new, in which we progressively discover the sequential patterns in period of interest. Period of interest is a sliding window continuously advancing as the time goes by. As the focus of sliding window changes, the new items are added to the dataset of interest and obsolete items are removed from it and become up to date. In general, the existing proposals do not fully explore the real world scenario, such as items associated with support in data stream applications such as market basket analysis. Thus mining important knowledge from supported frequent items becomes a non trivial research issue. Our proposed novel approach efficiently mines frequent sequential pattern coupled with support using progressive mining tree.

  1. Finding Recently Frequent Items over Online Data Streams

    Institute of Scientific and Technical Information of China (English)

    YIN Zhi-wu; HUANG Shang-teng

    2006-01-01

    In this paper, a new algorithm HCOUNT + is proposed to find frequent items over data stream based on the HCOUNT algorithm. The new algorithm adopts aided measures to improve the precision of HCOUNT greatly. In addition,HCOUNT + is introduced to time critical applications and a novel sliding windows-based algorithm SL-HCOUNT + is proposed to mine the most frequent items occurring recently.This algorithm uses limited memory (nB · (1 +α) · e/ε·In(-M/lnρ)(α<1) counters), requires constant processing time per packet (only (1+α) · ln(-M/lnρ(α<1)) counters are updated), makes only one pass over the streaming data,and is shown to work well in the experimental results.

  2. Lymphedema following cancer therapy in Slovenia: a frequently overlooked condition?

    OpenAIRE

    Rucigaj, Tanja Planinsek; Leskovec, Nada Kecelj; Zunter*, Vesna Tlaker

    2010-01-01

    Introduction Secondary lymphedema following cancer therapy is a frequent, often painful, quality of life disturbing condition, reducing the patients’ mobility and predisposing them to complications, e.g. infections and malignancies. The critical aspect of lymphedema therapy is to start as soon as possible to prevent the irreversible tissue damage. Patients and methods We performed a retrospective study of patients with lymphedema, treated at the Department of Dermatovenereology, University Me...

  3. Predictors of frequent oral analgesic use in rheumatoid arthritis

    OpenAIRE

    Gupta, Esha Das; Tee, Huey Shin; Sakthiswary, Rajalingham

    2014-01-01

    Objective: The main objective of this study was to determine the predictors of frequent oral analgesic use among Rheumatoid Arthritis (RA) patients who were prescribed with the above medication on an ‘as-needed’ basis. Methods: Patients with RA were recruited consecutively from the Rheumatology outpatient clinics in this cross-sectional study. The sociodemographic data, frequency of oral analgesic intake, Patient Global Assessment (PGA) scores and HAQ (Health Assessment Questionnaire) scores ...

  4. Lymphedema following cancer therapy in Slovenia: a frequently overlooked condition?:

    OpenAIRE

    Rucigaj, Tanja Planinsek; Leskovec, Nada Kecelj; Zunter*, Vesna Tlaker

    2010-01-01

    Introduction Secondary lymphedema following cancer therapy is a frequent, often painful, quality of life disturbing condition, reducing the patients’ mobility and predisposing them to complications, e.g. infections and malignancies. The critical aspect of lymphedema therapy is to start as soon as possible to prevent the irreversible tissue damage. Patients and methods We performed a retrospective study of patients with lymphedema, treated at the Department of Dermatovenereology, University Me...

  5. Frequent Replenishment Sustains the Beneficial Microbiome of Drosophila melanogaster

    OpenAIRE

    2013-01-01

    ABSTRACT We report that establishment and maintenance of the Drosophila melanogaster microbiome depend on ingestion of bacteria. Frequent transfer of flies to sterile food prevented establishment of the microbiome in newly emerged flies and reduced the predominant members, Acetobacter and Lactobacillus spp., by 10- to 1,000-fold in older flies. Flies with a normal microbiome were less susceptible than germfree flies to infection by Serratia marcescens and Pseudomonas aeruginosa. Augmentation ...

  6. Osteoporosis is less frequent in endometrial cancer survivors with hypertriglyceridemia.

    Science.gov (United States)

    Hirasawa, Akira; Makita, Kazuya; Akahane, Tomoko; Yamagami, Wataru; Makabe, Takeshi; Yokota, Megumi; Horiba, Yuko; Ogawa, Mariko; Yanamoto, Shigehisa; Deshimaru, Rhota; Tominaga, Eiichiro; Banno, Kouji; Susumu, Nobuyuki; Aoki, Daisuke

    2015-01-01

    We previously reported an association between dyslipidemia and endometrial cancers. Osteoporosis is also reported to relate with some cancers. A common etiologic event has been proposed between dyslipidemia and osteoporosis. However, the pattern of interrelationships among dyslipidemia, osteoporosis and endometrial cancer is not well understood. To improve the quality of life of endometrial cancer survivors, these relationships should be determined. This study included 179 Japanese menopausal women who underwent bilateral salpingo-oophorectomy, including 114 women with incident endometrial cancer and 65 without endometrial cancer. The women were categorized according to dyslipidemia status. Bone mineral density was measured and compared between groups. Osteoporosis was statistically more frequent in women with hypertriglyceridemia who did not have endometrial cancer. In contrast, osteoporosis was statistically less frequent in women with hypertriglyceridemia who had endometrial cancer. In this cross-sectional study in a Japanese population, osteoporosis was associated with hypertriglyceridemia in post-menopausal women without endometrial cancer, but was less frequent in endometrial cancer survivors with hypertriglyceridemia.

  7. IMPLEMENTASI ALGORITMA APRIORI UNTUK MENEMUKAN FREQUENT ITEMSET DALAM KERANJANG BELANJA

    Directory of Open Access Journals (Sweden)

    Adie Wahyudi Oktavia Gama

    2016-11-01

    Full Text Available Algoritma apriori menggunakan pendekatan iteratif dimana k-itemset digunakan untuk mengeksplorasi (k+1-itemset. Calon (k+1-itemset yang mengandung frekuensi subset yang jarang muncul atau dibawah threshold akan dipangkas dan tidak dipakai menentukan aturan asosiasi. Aturan asosiasi berbentuk if antecedent then consequent. Implementasi algoritma apriori didahului dengan persiapan database transaksi serta penentuan batas minimum support dan confidence. Algoritma apriori akan menemukan kombinasi dengan cara iterasi yaitu scaning database berulang-ulang, memasangkan satu item dengan item lainnya dan mencatat jumlah kemunculan kombinasi dalam keseluruhan transaksi. Frequent itemset ditentukan dengan memilih itemset yang nilai kemuculannya diatas atau sama dengan nilai minimum support dan kemudian menjadi calon aturan asosiasi. Persentase nilai support dan confidence dari masing-masing calon aturan asosiasi kemudian dihitung. Aturan asosiasi yang berlaku dipilih dari yang memenuhi syarat minimum support dan confidence. Penelitian ini membuktikan bahwa algoritma apriori cocok diimplementasikan untuk mencari frequent itemset pada keranjang belanja. Aturan asosiasi yang dibentuk dari frequent itemset tersebut dapat dipakai sebagai pendukung keputusan dalam penjualan.

  8. Incremental Frequent Subgraph Mining on Large Evolving Graphs

    KAUST Repository

    Abdelhamid, Ehab

    2017-08-22

    Frequent subgraph mining is a core graph operation used in many domains, such as graph data management and knowledge exploration, bioinformatics and security. Most existing techniques target static graphs. However, modern applications, such as social networks, utilize large evolving graphs. Mining these graphs using existing techniques is infeasible, due to the high computational cost. In this paper, we propose IncGM+, a fast incremental approach for continuous frequent subgraph mining problem on a single large evolving graph. We adapt the notion of “fringe” to the graph context, that is the set of subgraphs on the border between frequent and infrequent subgraphs. IncGM+ maintains fringe subgraphs and exploits them to prune the search space. To boost the efficiency, we propose an efficient index structure to maintain selected embeddings with minimal memory overhead. These embeddings are utilized to avoid redundant expensive subgraph isomorphism operations. Moreover, the proposed system supports batch updates. Using large real-world graphs, we experimentally verify that IncGM+ outperforms existing methods by up to three orders of magnitude, scales to much larger graphs and consumes less memory.

  9. Evaluation of phytotoxicity effect of olive mill wastewater treated by different technologies on seed germination of barley (Hordeum vulgare L.).

    Science.gov (United States)

    Rusan, Munir J M; Albalasmeh, Ammar A; Zuraiqi, Said; Bashabsheh, Mohammad

    2015-06-01

    Olive-mill wastewater (OMW) is a by-product effluent of olive oil extraction process that is produced in large amount in the Mediterranean region. OMW is believed to induce phytotoxic effect on organisms including seed germination and plant growth. The objective of this study was to evaluate the impact of untreated and treated OMW with different techniques on seed germination of barley (Hordeum vulgare L.). The following treatments were investigated: (1) tap water (control); (2) OMW treated by aerobic biological technology in a Jacto Reactor (JR); (3) OMW treated by solar fenton oxidation (SFO); (4) OMW treated by microfiltration followed by nanofiltration (MF+NF); (5) OMW treated by microfiltration followed by reverse osmosis (MF+RO) process; (6) diluted OMW with tap water (25 % OMW); (7) diluted OMW with tap water (50 % OMW); (8) diluted OMW with tap water (75 % OMW); and (9) untreated OMW (100 % OMW). A germination test was conducted in an incubator at temperature of 23 (∘)C. In each petri dish, a filter paper was mounted and ten seeds of barley were placed on the filter paper. Five milliliter of water were added to each petri dish. The seed germination was determined by counting the number of germinated seeds to calculate the percentage of germination (G %). Germination rate index (GRI), seed vigor index (SVI), and phytotoxicity index (PI) were also calculated. Then, the dry weights and lengths of the shoots and the roots of the germinated seeds were measured. The results show that 100, 75, and 50 %OMW were very phytotoxic and completely prohibited seed germination. However, phytotoxicity decreased significantly following treatments of OMW with all techniques investigated and by the 25 % OMW dilution, as results of removing the phenols and other phytotoxic organic compounds from the OMW or by diluting it. This was evidenced by relative enhancement of the dry weights and lengths of shoot and root as well as the G %, GRI, SVG, and PI. It was concluded that if

  10. Analysis of Wearable and Smartphone-Based Technologies for the Measurement of Barbell Velocity in Different Resistance Training Exercises

    Directory of Open Access Journals (Sweden)

    Carlos Balsalobre-Fernández

    2017-08-01

    Full Text Available The purpose of this study was to analyze the validity, reliability, and accuracy of new wearable and smartphone-based technology for the measurement of barbell velocity in resistance training exercises. To do this, 10 highly trained powerlifters (age = 26.1 ± 3.9 years performed 11 repetitions with loads ranging 50–100% of the 1-Repetition maximum in the bench-press, full-squat, and hip-thrust exercises while barbell velocity was simultaneously measured using a linear transducer (LT, two Beast wearable devices (one placed on the subjects' wrist –BW–, and the other one directly attached to the barbell –BB– and the iOS PowerLift app. Results showed a high correlation between the LT and BW (r = 0.94–0.98, SEE = 0.04–0.07 m•s−1, BB (r = 0.97–0.98, SEE = 0.04–0.05 m•s−1, and the PowerLift app (r = 0.97–0.98, SEE = 0.03–0.05 m•s−1 for the measurement of barbell velocity in the three exercises. Paired samples T-test revealed systematic biases between the LT and BW, BB and the app in the hip-thrust, between the LT and BW in the full-squat and between the LT and BB in the bench-press exercise (p < 0.001. Moreover, the analysis of the linear regression on the Bland-Altman plots showed that the differences between the LT and BW (R2 = 0.004–0.03, BB (R2 = 0.007–0.01, and the app (R2 = 0.001–0.03 were similar across the whole range of velocities analyzed. Finally, the reliability of the BW (ICC = 0.910–0.988, BB (ICC = 0.922–0.990, and the app (ICC = 0.928–0.989 for the measurement of the two repetitions performed with each load were almost the same than that observed with the LT (ICC = 0.937–0.990. Both the Beast wearable device and the PowerLift app were highly valid, reliable, and accurate for the measurement of barbell velocity in the bench-press, full-squat, and hip-thrust exercises. These results could have potential practical applications for strength and conditioning coaches who wish to measure barbell

  11. Growth of frequently Birkhoff-universal functions of exponential type on rays

    OpenAIRE

    Beise, Hans-Peter

    2012-01-01

    We consider growth conditions for (frequently) Birkhoff-universal functions of exponential type with respect to the different rays emanating from the origin. For that purpose, we investigate their (conjugate) indicator diagram or, equivalently, their indicator function. Some known results, where growth is measured with respect to the maximum modulus, are extended.

  12. Frequent periodic leg movement during sleep is an unrecognized risk factor for progression of atrial fibrillation.

    Directory of Open Access Journals (Sweden)

    Mahek Mirza

    Full Text Available Sleep apnea has been recognized as a factor predisposing to atrial fibrillation recurrence and progression. The effect of other sleep-disturbing conditions on atrial fibrillation progression is not known. We sought to determine whether frequent periodic leg movement during sleep is a risk factor for progression of atrial fibrillation. In this retrospective study, patients with atrial fibrillation and a clinical suspicion of restless legs syndrome who were referred for polysomnography were divided into two groups based on severity of periodic leg movement during sleep: frequent (periodic movement index >35/h and infrequent (≤35/h. Progression of atrial fibrillation to persistent or permanent forms between the two groups was compared using Wilcoxon rank-sum test, chi-square tests and logistic regression analysis. Of 373 patients with atrial fibrillation (77% paroxysmal, 23% persistent, 108 (29% progressed to persistent or permanent atrial fibrillation during follow-up (median, 33 months; interquartile range, 16-50. Compared to patients with infrequent periodic leg movement during sleep (n=168, patients with frequent periodic leg movement during sleep (n=205 had a higher rate of atrial fibrillation progression (23% vs. 34%; p=0.01. Patients with frequent periodic leg movement during sleep were older and predominantly male; however, there were no significant differences at baseline in clinical factors that promote atrial fibrillation progression between both groups. On multivariate analysis, independent predictors of atrial fibrillation progression were persistent atrial fibrillation at baseline, female gender, hypertension and frequent periodic leg movement during sleep. In patients with frequent periodic leg movement during sleep, dopaminergic therapy for control of leg movements in patients with restless legs syndrome reduced risk of atrial fibrillation progression. Frequent leg movement during sleep in patients with restless legs syndrome is

  13. Comparative analysis of methods for gene transcription profiling data derived from different microarray technologies in rat and mouse models of diabetes

    Directory of Open Access Journals (Sweden)

    Bihoreau Marie-Thérèse

    2009-02-01

    Full Text Available Abstract Background Microarray technologies are widely used to quantify the abundance of transcripts corresponding to thousands of genes. To maximise the robustness of transcriptome results, we have tested the performance and reproducibility of rat and mouse gene expression data obtained with Affymetrix, Illumina and Operon platforms. Results We present a thorough analysis of the degree of reproducibility provided by analysing the transcriptomic profile of the same animals of several experimental groups under different popular microarray technologies in different tissues. Concordant results from inter- and intra-platform comparisons were maximised by testing many popular computational methods for generating fold changes and significances and by only considering oligonucleotides giving high expression levels. The choice of Affymetrix signal extraction technique was shown to have the greatest effect on the concordance across platforms. In both species, when choosing optimal methods, the agreement between data generated on the Affymetrix and Illumina was excellent; this was verified using qRT-PCR on a selection of genes present on all platforms. Conclusion This study provides an extensive assessment of analytical methods best suited for processing data from different microarray technologies and can assist integration of technologically different gene expression datasets in biological systems.

  14. Competition and Synergy of Different Technologies in the Subsurface: A Case Study for CCS vs. Geothermal Energy Production

    Science.gov (United States)

    Kissinger, Alexander; Juan-Lien Ramírez, Alina; Class, Holger

    2013-04-01

    Global climate change, shortage of resources and the resulting turn towards renewable sources of energy lead to a growing demand for the utilization of subsurface systems. Among these competing uses are Carbon Capture and Storage (CCS), geothermal energy, nuclear waste disposal, "renewable" methane or hydrogen storage as well as the ongoing production of fossil resources like oil, gas, and coal. The different uses of the subsurface can result in competition for the limited subsurface space, but in some cases there may also be synergetic effects, if the technologies are combined in a clever way. The idea behind this case study is to investigate the effects of a CCS site on a geothermal power plant operated in its vicinity and present both positive and negative impacts. During CCS operations large quantities of carbon dioxide (CO2) are injected into a storage formation. This causes a pressure increase as the brine in the formation is displaced by CO2. These elevations in pressure can have an extent of several tens of kilometers from the injection well in contrast to the much smaller extent of the CO2 plume. If geothermal power plants operate in the range influenced by pressure evaluation, this may have an impact on their performance. For example: Increased discharge of "warm" brine could be favorable for geothermal power plants as the time until thermal depletion of the reservoir may also increase Early breakthrough of the cold water front between an injection and an extraction well due to a brine discharge "pushing" the cold water front towards the extraction well may lead to a decrease in performance of the power plant Of course, there is a huge number of possible hydrogeological settings and technical configurations for geothermal power production that may be combined to an even larger number of possible scenarios. In this work however we use a simple model setup in which we incorporate and vary the parameters that we think are crucial. Only porous (not fractured

  15. Different Traditions in the Study of Disciplinarity in Science--Science and Technology Studies, Library and Information Science and Scientometrics

    Science.gov (United States)

    Milojevic, Staša

    2013-01-01

    Introduction: Disciplinarity and other forms of differentiation in science have long been studied in the fields of science and technology studies, information science and scientometrics. However, it is not obvious whether these fields are building on each other's findings. Methods: An analysis is made of 609 articles on disciplinarity…

  16. The Implications of the Differences between Design Research and Instructional Systems Design for Educational Technology Researchers and Practitioners

    Science.gov (United States)

    Oh, Eunjung; Reeves, Thomas C.

    2010-01-01

    Design research (DR) has been an emerging research paradigm in the field of educational technology as well as in education generally for two decades. Educational design research integrates design and research into a socially responsible approach to inquiry related to learning and teaching. Given its still relative novelty, design research requires…

  17. The Implications of the Differences between Design Research and Instructional Systems Design for Educational Technology Researchers and Practitioners

    Science.gov (United States)

    Oh, Eunjung; Reeves, Thomas C.

    2010-01-01

    Design research (DR) has been an emerging research paradigm in the field of educational technology as well as in education generally for two decades. Educational design research integrates design and research into a socially responsible approach to inquiry related to learning and teaching. Given its still relative novelty, design research requires…

  18. Learner Differences in Perceived Satisfaction of an Online Learning: An Extension to the Technology Acceptance Model in an Arabic Sample

    Science.gov (United States)

    Al-Azawei, Ahmed; Lundqvist, Karsten

    2015-01-01

    Online learning constitutes the most popular distance-learning method, with flexibility, accessibility, visibility, manageability and availability as its core features. However, current research indicates that its efficacy is not consistent across all learners. This study aimed to modify and extend the factors of the Technology Acceptance Model…

  19. XAF1 is frequently methylated in human esophageal cancer

    Institute of Scientific and Technical Information of China (English)

    Xiang-Yu Chen; Qiao-Yu He; Ming-Zhou Guo

    2012-01-01

    adjacent tissue,and demonstrated XAF1 in the nucleus and cytoplasm.XAF1 staining was found in 20/32 samples of adjacent normal tissue but was present in only 8/32 samples of esophageal cancer tissue (x2=9.143,P =0.002).XAF1 expression was decreased in cancer samples compared with adjacent tissues.In 32 cases of esophageal cancer,24/32 samples were methylated,and 8/32 esophageal cancer tissues were unmethylated.XAF1 staining was found in 6/8 samples of unmethylated esophageal cancer and 2/24 samples of methylated esophageal cancer tissue.XAF1 staining was inversely correlated with XAF1 promoter region methylation (Fisher's exact test,P =0.004).Regarding methylation status and clinicopathological data,no significant differences were found in sex,age,tumor size,tumor stage,or metastasis with respect to methylation of XAF1 for the 72 tissue samples from patients with esophageal cancer.CONCLUSION:XAF1 is frequently methylated in esophageal cancer,and XAF1 expression is regulated by promoter region hypermethylation.

  20. Extremely frequent behavior in consumer research: theory and empirical evidence for chronic casino gambling.

    Science.gov (United States)

    Perfetto, Ralph; Woodside, Arch G

    2009-09-01

    The present study informs understanding of customer segmentation strategies by extending Twedt's heavy-half propositions to include a segment of users that represent less than 2% of all households-consumers demonstrating extremely frequent behavior (EFB). Extremely frequent behavior (EFB) theory provides testable propositions relating to the observation that few (2%) consumers in many product and service categories constitute more than 25% of the frequency of product or service use. Using casino gambling as an example for testing EFB theory, an analysis of national survey data shows that extremely frequent casino gamblers do exist and that less than 2% of all casino gamblers are responsible for nearly 25% of all casino gambling usage. Approximately 14% of extremely frequent casino users have very low-household income, suggesting somewhat paradoxical consumption patterns (where do very low-income users find the money to gamble so frequently?). Understanding the differences light, heavy, and extreme users and non-users can help marketers and policymakers identify and exploit "blue ocean" opportunities (Kim and Mauborgne, Blue ocean strategy, Harvard Business School Press, Boston, 2005), for example, creating effective strategies to convert extreme users into non-users or non-users into new users.

  1. Case-control study of frequent visitors to an urban psychiatric emergency service.

    Science.gov (United States)

    Arfken, Cynthia L; Zeman, Lori L; Yeager, Lindsay; White, Aja; Mischel, Edward; Amirsadri, Alireza

    2004-03-01

    The purpose of this study was to identify risk factors for people who use psychiatric emergency services repeatedly and to estimate their financial charges. The authors used interviews and chart reviews to compare 74 patients who had six or more visits to an urban psychiatric emergency service in the 12 months before an index visit with 74 patients who had five or fewer visits. Multivariate logistic regression was used to identify independent risk factors. Independent risk factors for frequent visitors were self-reported hospitalization in the past 12 months, need for medications as the self-reported reason for seeking care, being homeless or living in an institution, and not giving the name of a friend or family member for interview. The level of burden for support of persons who were interviewed was low and did not differ between frequent and infrequent visitors. Compared with infrequent visitors, frequent visitors had greater utilization of inpatient and outpatient behavioral health services, general emergency services, and crisis residential services in the 12 months before the index visit and greater utilization of general emergency services and psychiatric emergency services in the three months after the index visit. Frequent visitors' median financial charge for those services was 16,200 US dollars greater (5.9 times greater) than that of infrequent visitors. Frequent visitors represent resource-poor mentally ill persons who have high levels of utilization of health care facilities besides psychiatric emergency services. Possible clinical interventions for these patients include focused medication reviews.

  2. The most frequently used tests for assessing executive functions in aging

    Directory of Open Access Journals (Sweden)

    Camila de Assis Faria

    Full Text Available There are numerous neuropsychological tests for assessing executive functions in aging, which vary according to the different domains assessed. OBJECTIVE: To present a systematic review of the most frequently used instruments for assessing executive functions in older adults with different educational levels in clinical and experimental research. METHODS: We searched for articles published in the last five years, using the PubMed database with the following terms: "neuropsychological tests", "executive functions", and "mild cognitive impairment". There was no language restriction. RESULTS: 25 articles fulfilled all the inclusion criteria. The seven neuropsychological tests most frequently used to evaluate executive functions in aging were: [1] Trail Making Test (TMT Form B; [2] Verbal Fluency Test (VFT - F, A and S; [3] VFT Animals category; [4] Clock Drawing Test (CDT; [5] Digits Forward and Backward subtests (WAIS-R or WAIS-III; [6] Stroop Test; and [7] Wisconsin Card Sorting Test (WCST and its variants. The domains of executive functions most frequently assessed were: mental flexibility, verbal fluency, planning, working memory, and inhibitory control. CONCLUSION: The study identified the tests and domains of executive functions most frequently used in the last five years by research groups worldwide to evaluate older adults. These results can direct future research and help build evaluation protocols for assessing executive functions, taking into account the different educational levels and socio-demographic profiles of older adults in Brazil.

  3. Managing for Old Growth in Frequent-fire Landscapes

    Directory of Open Access Journals (Sweden)

    Carl E. Fiedler

    2007-12-01

    Full Text Available There is no one-size-fits-all approach to managing frequent-fire, old-growth forests. However, there are general guidelines to follow: 1 set objectives for both structure (tree density, diameter distribution, tree species composition, spatial arrangement, amount of coarse woody debris and function (nutrient cycling, desired tree species regeneration; 2 prioritize treatments according to ecological, economic, and social needs and risks; 3 identify the potential treatments (natural fire, prescribed fire, silvicultural cutting that best meet the objectives and scale of the project; and 4 implement the treatment(s. We discuss each of these guidelines in this article.

  4. Obsessive-compulsive disorder presenting with compulsions to urinate frequently

    Directory of Open Access Journals (Sweden)

    Stephen Amarjeet Jiwanmall

    2016-01-01

    Full Text Available Obsessive compulsive disorder (OCD is a common psychiatric disorder which is easily recognized. However, sometimes patients of OCD present in such an atypical presentation of symptoms and a pathway to care involving multiple specialities. We report a case of a girl who had consulted several physicians and a urologist for frequent micturition, who was treated as a case of OCD after clarifying the compulsive nature of her symptom. There was significant improvement in her condition following 8 weeks of treatment with 200 mg of Sertraline and behaviour therapy.

  5. FLCW: Frequent Itemset Based Text Clustering with Window Constraint

    Institute of Scientific and Technical Information of China (English)

    ZHOU Chong; LU Yansheng; ZOU Lei; HU Rong

    2006-01-01

    Most of the existing text clustering algorithms overlook the fact that one document is a word sequence with semantic information.There is some important semantic information existed in the positions of words in the sequence.In this paper, a novel method named Frequent Itemset-based Clustering with Window (FICW) was proposed, which makes use of the semantic information for text clustering with a window constraint.The experimental results obtained from tests on three (hypertext) text sets show that FICW outperforms the method compared in both clustering accuracy and efficiency.

  6. Extensible Technology-Agnostic Runtime Verification

    Directory of Open Access Journals (Sweden)

    Christian Colombo

    2013-02-01

    Full Text Available With numerous specialised technologies available to industry, it has become increasingly frequent for computer systems to be composed of heterogeneous components built over, and using, different technologies and languages. While this enables developers to use the appropriate technologies for specific contexts, it becomes more challenging to ensure the correctness of the overall system. In this paper we propose a framework to enable extensible technology agnostic runtime verification and we present an extension of polyLarva, a runtime-verification tool able to handle the monitoring of heterogeneous-component systems. The approach is then applied to a case study of a component-based artefact using different technologies, namely C and Java.

  7. The Evaluation of the Impact of New Technologies for Different Powertrain Medium-Duty Trucks on Fuel Consumption

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Lijuan; Duran, Adam; Kelly, Kenneth; Konan, Arnaud; Lammert, Michael; Prohaska, Robert

    2016-09-27

    In this paper, researchers at the National Renewable Energy Laboratory present the results of simulation studies to evaluate potential fuel savings as a result of improvements to vehicle rolling resistance, coefficient of drag, and vehicle weight as well as hybridization for four powertrains for medium-duty parcel delivery vehicles. The vehicles will be modeled and simulated over 1,290 real-world driving trips to determine the fuel savings potential based on improvements to each technology and to identify best use cases for each platform. The results of impacts of new technologies on fuel saving will be presented, and the most favorable driving routes on which to adopt them will be explored.

  8. Colonization by Staphylococcus aureus of Nano-Structured Fluorinated Surfaces, Formed by Different Methods of Ion-Plasma Technology.

    Science.gov (United States)

    Elinson, V M; Didenko, L V; Shevlyagina, N V; Avtandilov, G A; Gaidarova, A Kh; Lyamin, A N

    2016-11-01

    Colonization of fluorinated surfaces produced by ion-plasma technology by Staphylococcus aureus was studied by scanning electron microscopy and surface energy analysis. It was shown that the intensity of colonization was determined by the surface relief and fluorine content. Formation of nanostructured surfaces accompanied by a sharp decrease in the surface energy prevented adhesion of Staphylococcus aureus cells to the fluorine-containing surface.

  9. 频繁模式溯源%Tracking Provenance of Frequent Patterns

    Institute of Scientific and Technical Information of China (English)

    王斌; 刘向宇; 杨晓春; 王国仁

    2012-01-01

    Data provenance studies the processes of data generation, transformation and update. Based on properties and features of frequent patterns (FP), this paper proposes an FP+ tree to store sources of frequent patterns. Then, it gives the related theories and proofs for tracking provenances of frequent patterns, proposes three tracking methods for frequent patterns based on different lineage tracing mechanism, and deduces the correctness and theoretical cost of each method. While mining frequent patterns, the lineages of frequent patterns can be traced without extra cost. According to the structure of conditional FP + tree and properties of frequent patterns, the paper also proposes a-pruning for efficiently projecting conditional FP+ tree and improving the efficiency of lineage tracing. Experimental results show that the FP+ tree based tracking provenance of frequent patterns can get sources of frequent patterns efficiently, and a-pruning for conditional FP+ tree is efficient.%数据起源是关于数据来源、转换和更新过程的研究.基于频繁模式挖掘的性质和特点,提出了FP+树来记录频繁模式来源.给出了频繁模式溯源的相关理论和证明,根据不同追溯机制提出了三种频繁模式溯源方法,并对方法的正确性和执行代价给出了理论证明和推导.在进行频繁模式挖掘时,在不增加额外负担的情况下实现了频繁模式溯源.针对条件FP+树结构特点和频繁模式性质,提出了采用α-剪枝求解条件FP+树的投影操作,加快了频繁模式挖掘和数据溯源的执行效率.买验结果显示,采用基于FP+树的频繁模式溯源方法,可以高效地实现频繁模式溯源,并且条件FP+树的α-剪枝策略的有效性得到验证.

  10. Analyzing the Number of Varieties in Frequently Found Flows

    Science.gov (United States)

    Shomura, Yusuke; Watanabe, Yoshinori; Yoshida, Kenichi

    Abnormal traffic that causes various problems on the Internet, such as P2P flows, DDoS attacks, and Internet worms, is increasing; therefore, the importance of methods that identify and control abnormal traffic is also increasing. Though the application of frequent-itemset-mining techniques is a promising way to analyze Internet traffic, the huge amount of data on the Internet prevents such techniques from being effective. To overcome this problem, we have developed a simple frequent-itemset-mining method that uses only a small amount of memory but is effective even with the large volumes of data associated with broadband Internet traffic. Using our method also involves analyzing the number of distinct elements in the itemsets found, which helps identify abnormal traffic. We used a cache-based implementation of our method to analyze actual data on the Internet and demonstrated that such an implementation can be used to provide on-line analysis of data while using only a small amount of memory.

  11. Functional Aerophagia in Children: A Frequent, Atypical Disorder

    Directory of Open Access Journals (Sweden)

    Giuliana Morabito

    2014-04-01

    Full Text Available Aerophagia is a functional gastrointestinal disorder characterized by repetitive air swallowing, abdominal distension, belching and flatulence. Pathologic aerophagia is a condition caused by the swallowing of excessive volumes of air with associated various gastrointestinal symptoms, such as burping, abdominal cramps, flatulence and a reduced appetite. It is a clinical entity that can simulate pediatric gastrointestinal motility disorders, such as gastroparesis, megacolon and intestinal pseudo-obstruction, and presents more frequently in children with mental retardation. Early recognition and diagnosis of functional aerophagia or pathologic aerophagia is required to avoid unnecessary, expensive diagnostic investigations or serious clinical complications. Functional aerophagia is frequent in the adult population, but rarely discussed in the pediatric literature. We present two pediatric clinical cases with a history of functional constipation in whom gaseous abdominal distension was the most important symptom. Mechanical intestinal obstruction, chronic intestinal pseudo-obstruction, malabsorption and congenital aganglionic megacolon were ruled out. Extensive gaseous abdominal distension was due to aerophagia, and treatment consisted of parents' reassurance and psychological counseling.

  12. Frequent chromatin rearrangements in myelodysplastic syndromes--what stands behind?

    Science.gov (United States)

    Pagáčová, E; Falk, M; Falková, I; Lukášová, E; Michalová, K; Oltová, A; Raška, I; Kozubek, S

    2014-01-01

    Myelodysplastic syndromes (MDS) represent a clinically and genetically heterogeneous group of clonal haematopoietic diseases characterized by a short survival and high rate of transformation to acute myeloid leukaemia (AML). In spite of this variability, MDS is associated with typical recurrent non-random cytogenetic defects. Chromosomal abnormalities are detected in the malignant bone-marrow cells of approximately 40-80 % of patients with primary or secondary MDS. The most frequent chromosomal rearrangements involve chromosomes 5, 7 and 8. MDS often shows presence of unbalanced chromosomal changes, especially large deletions [del(5), del(7q), del(12p), del(18q), del(20q)] or losses of whole chromosomes (7 and Y). The most typical cytogenetic abnormality is a partial or complete deletion of 5q- that occurs in roughly 30 % of all MDS cases either as the sole abnormality or in combination with other aberrations as a part of frequently complex karyotypes. The mechanisms responsible for the formation of MDS-associated recurrent translocations and complex karyotypes are unknown. Since some of the mentioned aberrations are characteristic for several haematological malignancies, more general cellular conditions could be expected to play a role. In this article, we introduce the most common rearrangements linked to MDS and discuss the potential role of the non-random higher-order chromatin structure in their formation. A contribution of the chromothripsis - a catastrophic event discovered only recently - is considered to explain how complex karyotypes may occur (during a single event).

  13. WEB DOCUMENT SEGMENTATION USING FREQUENT TERM SETS FOR SUMMARIZATION

    Directory of Open Access Journals (Sweden)

    Sarukesi Karunakaran

    2012-01-01

    Full Text Available Query sensitive summarization aims at extracting the query relevant contents from web documents. Web page segmentation focuses on reducing the run time overhead of the summarization systems by grouping the related contents of a web page into segments. At query time, query relevant segments of the web page are identified and important sentences from these segments are extracted to compose the summary. DOM tree structures of the web documents are utilized to perform the segmentation of the contents. Leaf nodes of DOM tress are merged to form segments according to the statistical and linguistic similarity measure. The proposed system has been evaluated by intrinsic approach making use of user satisfaction index. The performance of the system is compared with summarization without using preprocessed segments. Performance of this system is more promising than the other measures like cosine similarity, jaccard measure which make use of sparse term-frequent vectors, since the most frequent term sets are considered to measure the relevance. Relevant segments alone need to be processed at run time for summarization which reduces the time complexity of the summarization process.

  14. Substance use treatment barriers for patients with frequent hospital admissions.

    Science.gov (United States)

    Raven, Maria C; Carrier, Emily R; Lee, Joshua; Billings, John C; Marr, Mollie; Gourevitch, Marc N

    2010-01-01

    Substance use (SU) disorders adversely impact health status and contribute to inappropriate health services use. This qualitative study sought to determine SU-related factors contributing to repeated hospitalizations and to identify opportunities for preventive interventions. Fifty Medicaid-insured inpatients identified by a validated statistical algorithm as being at high-risk for frequent hospitalizations were interviewed at an urban public hospital. Patient drug/alcohol history, experiences with medical, psychiatric and addiction treatment, and social factors contributing to readmission were evaluated. Three themes related to SU and frequent hospitalizations emerged: (a) barriers during hospitalization to planning long-term treatment and follow-up, (b) use of the hospital as a temporary solution to housing/family problems, and (c) unsuccessful SU aftercare following discharge. These data indicate that homelessness, brief lengths of stay complicating discharge planning, patient ambivalence regarding long-term treatment, and inadequate detox-to-rehab transfer resources compromise substance-using patients' likelihood of avoiding repeat hospitalization. Intervention targets included supportive housing, detox-to-rehab transportation, and postdischarge patient support.

  15. Forest Administration in Romania: Frequent Problems and Expectations

    Directory of Open Access Journals (Sweden)

    Mihai MARINCHESCU

    2014-12-01

    Full Text Available The aim of this study is to describe the status and evolution of forest management in Romania in terms of forest regime, as well as to highlight the most frequent problems and common expectations of forest district managers. Underlying the presented results are an analysis of the compiled statistical indicators used in Romanian forestry and the outcome of a sociological survey conducted on a sample of 345 forest district managers. In early 2013, over 4.4 million hectares of state, public and private forest land were administered by state and experimental forest districts, and over 1.7 million hectares of forest land, other than state-owned, by private forest districts. Note that approximately 0.36 million hectares (over 5% of Romania’s forest area are not in the care of specialized units, contrary to the legal provisions. The most frequent problems faced by forest district managers arise in relation to the owners of forests or are caused by illegal logging. This study is a contribution to making the concrete problems faced by foresters and especially the structure and ownership related characteristics of forestland the driving force of legislative changes in the forestry sector.

  16. Impaired Executive Functions in Subjects with Frequent Nightmares as Reflected by Performance in Different Neuropsychological Tasks

    Science.gov (United States)

    Simor, Peter; Pajkossy, Peter; Horvath, Klara; Bodizs, Robert

    2012-01-01

    Nightmare disorder is a prevalent parasomnia characterized by vivid and highly unpleasant dream experiences during night time sleep. The neural background of disturbed dreaming was proposed to be associated with impaired prefrontal and fronto-limbic functioning during REM sleep. We hypothesized that the impaired prefrontal and fronto-limbic…

  17. Ionizing radiation effect on different types of flours used in bakery technology; Efeito da radiacao ionizante em diferentes tipos de farinhas utilizadas em tecnologia de panificacao

    Energy Technology Data Exchange (ETDEWEB)

    Teixeira, Christian Alexandre Heinz Melsheimer

    2011-07-01

    In this work, an evaluation of the changes caused by ionizing radiation in different types and quantities of products rich in starch (wheat flour, cassava, rye, whole wheat, green banana pulp and maize) on rheological, technological, physical and texture characteristics was studied. The samples were irradiated in a {sup 60}Co source with doses up to 10kGy, and dose rate about 2kGy/h. It was studied the force and the extensibility of strong and weak wheat flours and the rheological behavior was observed for one, five and thirty days after irradiation. The technological characteristic studied for up to 1 month after irradiation, was the enzymatic activity of the irradiated, weak and strong flours. The physical characteristics: height, weight and moisture loss and texture of loaves made with a partial replacement (30%) of wheat flour by different irradiated flours was established. The results showed that with the increase of radiation dose there was an increase of enzymatic activity, especially for higher doses (9kGy). These results corroborate for the understanding that there would be no need of addition of enzymatic improvers for the bread confection. The height, weight, and loss of moisture from the products developed with different substitutions of flours used in the formulations, showed different behaviors. With an increasing of the radiation dose applied, there was an increase in the height of the loaves, as well as a reduced loss of moisture on the products developed with substitution of 30% of the wheat flour with irradiated wheat flour and pulp of green banana flour. From a technological standpoint, the enzymatic activity was not adversely affected by radiation. Considering the characteristics studied, the dose of 9kGy would be recommended seeking the production of loaves. Although the irradiation process is generally applied in the preservation of hygienic quality of food products, its use on different kinds of flours used in bread production may induce some

  18. Living Technology

    DEFF Research Database (Denmark)

    2010-01-01

    This book is aimed at anyone who is interested in learning more about living technology, whether coming from business, the government, policy centers, academia, or anywhere else. Its purpose is to help people to learn what living technology is, what it might develop into, and how it might impact...... our lives. The phrase 'living technology' was coined to refer to technology that is alive as well as technology that is useful because it shares the fundamental properties of living systems. In particular, the invention of this phrase was called for to describe the trend of our technology becoming...... increasingly life-like or literally alive. Still, the phrase has different interpretations depending on how one views what life is. This book presents nineteen perspectives on living technology. Taken together, the interviews convey the collective wisdom on living technology's power and promise, as well as its...

  19. Living Technology

    DEFF Research Database (Denmark)

    2010-01-01

    This book is aimed at anyone who is interested in learning more about living technology, whether coming from business, the government, policy centers, academia, or anywhere else. Its purpose is to help people to learn what living technology is, what it might develop into, and how it might impact...... our lives. The phrase 'living technology' was coined to refer to technology that is alive as well as technology that is useful because it shares the fundamental properties of living systems. In particular, the invention of this phrase was called for to describe the trend of our technology becoming...... increasingly life-like or literally alive. Still, the phrase has different interpretations depending on how one views what life is. This book presents nineteen perspectives on living technology. Taken together, the interviews convey the collective wisdom on living technology's power and promise, as well as its...

  20. Troubling distinctions: a semiotics of the nursing/technology relationship.

    Science.gov (United States)

    Sandelowski, M

    1999-09-01

    I consider the discursive practices that have served conceptually and ontologically to trouble the boundaries between nursing and technology: between nurse/human/subject and machine/non-human/object. Nursing and technology have been semiotically related largely by two processes: (a) by the metaphor that depicts nursing as technology and (b) by opposition, or as not like and even in conflict with technology. Less frequently but no less significantly, nursing and technology have been semiotically linked (c) by the metaphor that depicts technology as nursing and (d) by metonymy, or by word or picture juxtapositions of nursing with technology. The troubling distinctions between nursing and technology suggest yet another reason why the construction of difference continues to elude nursing.

  1. Frequent occurrence of uniparental disomy in colorectal cancer

    DEFF Research Database (Denmark)

    Andersen, Claus Lindbjerg; Wiuf, Carsten; Kruhøffer, Mogens;

    2007-01-01

    , consisting of 17 normal mucosa and 66 adenocarcinoma samples. The transcriptional analysis revealed an unchanged expression level in areas with intact copy number, including regions with uniparental disomy, and a reduced expression level in the LOH regions representing factual losses (including 5q, 8p and 17......) and lymph node metastasis status (gain of 7q and 13q). Another subset of the identified alterations was shown to represent intratumor heterogeneity. In conclusion, we demonstrate that uniparental disomy is frequent in CRC, and identify genomic alterations associated with TP53 inactivation and lymph node...... LOH regions showed no evidence of a reduced copy number, indicating the presence of uniparental structures. The distribution of these structures was non-random, primarily involving 8q, 13q and 20q. This finding was supported by analysis of an independent set of array-based transcriptional profiles...

  2. Personality Profiles and Frequent Heavy Drinking in Young Adulthood.

    Science.gov (United States)

    Zhang, Jieting; Bray, Bethany C; Zhang, Minqiang; Lanza, Stephanie T

    2015-07-01

    Few studies examining the link between personality and alcohol use have adopted a comprehensive modeling framework to take into account individuals' profiles across multiple personality traits. In this study, latent profile analysis (LPA) was applied to a national sample of young adults in the United States to identify subgroups defined by their profiles of mean scores on the Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness personality factors. Personality profiles were then used to predict heavy drinking. Five profiles were identified: Reserved, Rigid, Confident, Ordinary, and Resilient. Compared to individuals in the Ordinary profile, those with Reserved and Resilient profiles were at increased risk of frequent heavy drinking. These findings suggest which comprehensive personality profiles may place individuals at risk for problematic alcohol-related outcomes.

  3. Frequent itemsets mining for database auto-administration

    CERN Document Server

    Aouiche, Kamel; Gruenwald, Le

    2008-01-01

    With the wide development of databases in general and data warehouses in particular, it is important to reduce the tasks that a database administrator must perform manually. The aim of auto-administrative systems is to administrate and adapt themselves automatically without loss (or even with a gain) in performance. The idea of using data mining techniques to extract useful knowledge for administration from the data themselves has existed for some years. However, little research has been achieved. This idea nevertheless remains a very promising approach, notably in the field of data warehousing, where queries are very heterogeneous and cannot be interpreted easily. The aim of this study is to search for a way of extracting useful knowledge from stored data themselves to automatically apply performance optimization techniques, and more particularly indexing techniques. We have designed a tool that extracts frequent itemsets from a given workload to compute an index configuration that helps optimizing data acce...

  4. Sensemaking technologies

    DEFF Research Database (Denmark)

    Madsen, Charlotte Øland

    Research scope: The scope of the project is to study technological implementation processes by using Weick's sensemaking concept (Weick, 1995). The purpose of using a social constructivist approach to investigate technological implementation processes is to find out how new technologies transform......, Orlikowski 2000). Viewing the use of technology as a process of enactment opens up for investigating the social processes of interpreting new technology into the organisation (Orlikowski 2000). The scope of the PhD project will therefore be to gain a deeper understanding of how the enactment of new...... & Brass, 1990; Kling 1991; Orlikowski 2000). It also demonstrates that technology is a flexible variable adapted to the organisation's needs, culture, climate and management philosophy, thus leading to different uses and outcomes of the same technology in different organisations (Barley 1986; 1990...

  5. Ganglion Cells Are Frequently Present in Pediatric Mucosal Colorectal Biopsies.

    Science.gov (United States)

    Kovach, Alexandra E; Pacheco, M Cristina

    2017-01-01

    Hirschsprung disease (HD) rarely presents as chronic constipation after the newborn period. At our institution, calretinin immunohistochemistry (CAL) is frequently requested by clinicians on rectal mucosal biopsies (RMBs) taken during colonoscopy in older children in whom suspicion for HD is low. We hypothesized that review of these biopsies would frequently reveal ganglion cells (GCs). We reviewed features of mucosal biopsies (November 2013 to September 2015) from children ≥1 year of age on which clinicians had requested CAL on at least one specimen. A total of 93 biopsies with paired CAL from 83 patients were suitable for study (ages 1-18 years, M:F 1.2). Submitted clinical indication was constipation in 62 patients (75%). GCs were found within or subjacent to muscularis mucosa in 63 biopsies (68%), 12 (19%) of which were designated from a specific anatomic site, eg, 2 or 3 cm. In 25 of 63 (40%) cases, GCs were identified on one of the first 3 sections (median 5th, range 1st-54th). Forty-six cases (73%) contained no or 1 mm of SM, and 21 (70%) had no SM. CAL was positive in 28 (93%) and equivocal/weak in 2 (7%); no additional work-up for HD was pursued. The data suggest that H&E sections of RMBs can exclude HD at a specified site in many cases and provide the basis for a future study examining the utility of CAL in RMBs without SM as a means for excluding HD.

  6. Gastrocnemius tendinosis--A frequent finding on MRI knee examination.

    Science.gov (United States)

    Jawahar, Anugayathri; Lu, Yanan; Okur, Gokcan; Kliethermes, Stephanie; Lomasney, Laurie

    2015-12-01

    Gastrocnemius tendinosis (GT) is one potential cause for posterior knee pain, commonly overlooked on clinical examinations and imaging. This study assesses the frequency of GT on MR imaging in a convenience sample based on a database search and associations with other articular pathologies and clinical findings. With IRB approval, retrospective review was completed on 300 randomly selected MR knee exams performed from February 2009 to June 2010. Following de-identification, axial T2 and sagittal PD images, with or without fat suppression, were reviewed by 2 radiologists. The gastrocnemius tendon femoral attachments were graded as normal, mild (few cysts, thickening, intermediate signal) or severe GT (multiple cysts, marrow edema, tear). Select associated MR findings of internal derangement were documented. Clinical charts were reviewed for clinical presentation, physical exam findings, and select demographics. The inter-observer reliability for presence/grading of GT was very high (kappa statistic=0.97). Frequency of GT was 50.33%, most frequently involving medial head of gastrocnemius (63.6%). Grades of GT were 41.7% and 17.2% for mild and severe respectively. Univariate analysis showed statistically significant relationship between grade of GT with arthrosis (p=0.05) and clinical joint effusion (p=0.02). Multivariate analysis showed higher odds of severe GT for individuals with medial plus lateral GT. Statistical significance was noted for presence of both GT and ACL tear (13.9%; p=0.02). Significant findings of our analysis included GT presented with predominant involvement of medial head of gastrocnemius tendon, mild in severity, strong association with ACL tear, presented frequently as posterior knee pain, limited joint motion and clinical joint effusion. However, there was no statistically significant association between demographic features and medical comorbidities in the patients. Increased understanding of frequency of GT allows more accurate reporting of

  7. Comparative study of different fuel cell technologies; Estudio comparativo de las diferentes tecnologias de celdas de combustible

    Energy Technology Data Exchange (ETDEWEB)

    Alvarado-Flores, J.

    2013-06-01

    Fuel cells generate electricity and heat during electrochemical reaction which happens between the oxygen and hydrogen to form the water. Fuel cell technology is a promising way to provide energy for rural areas where there is no access to the public grid or where there is a huge cost of wiring and transferring electricity. In addition, applications with essential secure electrical energy requirement such as uninterruptible power supplies (UPS), power generation stations and distributed systems can employ fuel cells as their source of energy. The current paper includes a comparative study of basic design, working principle, applications, advantages and disadvantages of various technologies available for fuel cells. In addition, techno-economic features of hydrogen fuel cell vehicles (FCV) and internal combustion engine vehicles (ICEV) are compared. The results indicate that fuel cell systems have simple design, high reliability, noiseless operation, high efficiency and less environmental impact. The aim of this paper is to serve as a convenient reference for fuel cell power generation reviews. (Author) 113 refs.

  8. The most frequently cited adsorption research articles in the Science Citation Index (Expanded).

    Science.gov (United States)

    Fu, Hui-Zhen; Wang, Ming-Huang; Ho, Yuh-Shan

    2012-08-01

    The 126 most frequently cited articles published in the adsorption field between 1900 and 2011 were identified and characterized using the Science Citation Index (Expanded). The data analyzed cover a range of publication years, journals, Web of Science categories, authors, institutions, countries/territories, life citation cycle curves, and characteristics of frequently cited articles. The 126 most-frequently-cited articles were each cited an average of 1014 times, ranging from 502 to 9922 citations per article from 1918 to 2006; 80% of these articles were published after 1970. Fifty-five journals were represented, led by the Journal of the American Chemical Society, and followed by Science and Nature. Three categories out of the 35 Web of Science categories constituted 60% of the citations. The three categories were: physical chemistry, multidisciplinary chemistry, and multidisciplinary sciences. Thirteen of the authors contributed three or more articles. Harvard University, the Massachusetts Institute of Technology, and the University of Washington led the list of 107 institutions, while the United States led the list of 17 countries/territories, comprising more than half of the articles. Collaboration among the top authors was a frequent occurrence, while inter-institutional collaboration and national collaboration was not obvious among the topmost articles. Moreover, the citation patterns as a function of time varied widely among the topmost articles. As evidenced by citation life cycles, the well known BET and Langmuir isotherms have received considerable attention during the study period, and will probably continue to be popular in the adsorption field. Some emerging hotspots are likely to receive particular attention in the near future; these include the new family of "M41S" materials, pseudo-second-order kinetic models, and the nudged elastic band method.

  9. Frequently Asked Questions about Monitored Natural Attenuation in Groundwater

    Science.gov (United States)

    2014-02-01

    Technology 2001, 35(19): 3884-3891. (167) Lee, W.; Batchelor, B., Abiotic Reductive Dechlorination of Chlorinated Ethylenes by Iron-Bearing Soil...MNA was inspired by the fact that it has been over a decade since publication of Natu10l Attenuation of Fuels and Chlorinated Sol~~ents15 which was...effect, MNA is typically a component of every chlorinated -solvent site remedy. (ITRC Integrated DNAPL Strategy Guidance, 20 II, citing ITRC’s

  10. Epidemiology of frequent attenders: a 3-year historic cohort study comparing attendance, morbidity and prescriptions of one-year and persistent frequent attenders

    Directory of Open Access Journals (Sweden)

    ter Riet Gerben

    2009-01-01

    Full Text Available Abstract Background General Practitioners spend a disproportionate amount of time on frequent attenders. So far, trials on the effect of interventions on frequent attenders have shown negative results. However, these trials were conducted in short-term frequent attenders. It would be more reasonable to target intervention at persistent frequent attenders. Typical characteristics of persistent frequent attenders, as opposed to 1-year frequent attenders and non-frequent attenders, may generate hypotheses regarding modifiable factors on which new randomized trials may be designed. Methods We used the data of all 28,860 adult patients from 5 primary healthcare centers. Frequent attenders were patients whose attendance rate ranked in the (age and sex adjusted top 10 percent during 1 year (1-year frequent attenders or 3 years (persistent frequent attenders. All other patients on the register over the 3-year period were referred to as non-frequent attenders. The lists of medical problems coded by the GP using the International Classification of Primary Care (ICPC were used to assess morbidity. First, we determined which proportion of 1-year frequent attenders was still a frequent attender during the next two consecutive years and calculated the GPs' workload for these patients. Second, we compared morbidity and number of prescriptions for non-frequent attenders, 1-year frequent attenders and persistent frequent attenders. Results Of all 1-year frequent attenders, 15.4% became a persistent frequent attender equal to 1.6% of all patients. The 1-year frequent attenders (3,045; 10.6% were responsible for 39% of the face-to-face consultations; the 470 patients who would become persistent frequent attenders (1.6% were responsible for 8% of all consultations in 2003. Persistent frequent attenders presented more social problems, more psychiatric problems and medically unexplained physical symptoms, but also more chronic somatic diseases (especially diabetes

  11. Optical fibers installation the different technologies and the advantages of using the RTE power grid; Pose de fibres optiques les differentes technologies et les avantages lies a l'utilisation du reseau de transport d'electricite de RTE

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    To install optical fibers lines RTE implements two different technologies: the THYM line and the COE line. The two technologies are explained and compared with the advantages of using RTE for such an equipment. (A.L.B.)

  12. Modeling error in experimental assays using the bootstrap principle: understanding discrepancies between assays using different dispensing technologies

    Science.gov (United States)

    Hanson, Sonya M.; Ekins, Sean; Chodera, John D.

    2015-12-01

    All experimental assay data contains error, but the magnitude, type, and primary origin of this error is often not obvious. Here, we describe a simple set of assay modeling techniques based on the bootstrap principle that allow sources of error and bias to be simulated and propagated into assay results. We demonstrate how deceptively simple operations—such as the creation of a dilution series with a robotic liquid handler—can significantly amplify imprecision and even contribute substantially to bias. To illustrate these techniques, we review an example of how the choice of dispensing technology can impact assay measurements, and show how large contributions to discrepancies between assays can be easily understood and potentially corrected for. These simple modeling techniques—illustrated with an accompanying IPython notebook—can allow modelers to understand the expected error and bias in experimental datasets, and even help experimentalists design assays to more effectively reach accuracy and imprecision goals.

  13. Comparative analysis of 10 small molecules binding to carbonic anhydrase II by different investigators using Biacore technology.

    Science.gov (United States)

    Papalia, Giuseppe A; Leavitt, Stephanie; Bynum, Maggie A; Katsamba, Phinikoula S; Wilton, Rosemarie; Qiu, Huawei; Steukers, Mieke; Wang, Siming; Bindu, Lakshman; Phogat, Sanjay; Giannetti, Anthony M; Ryan, Thomas E; Pudlak, Victoria A; Matusiewicz, Katarzyna; Michelson, Klaus M; Nowakowski, Agnes; Pham-Baginski, Anh; Brooks, Jonathan; Tieman, Bryan C; Bruce, Barry D; Vaughn, Michael; Baksh, Michael; Cho, Yun Hee; Wit, Mieke De; Smets, Alexandra; Vandersmissen, Johan; Michiels, Lieve; Myszka, David G

    2006-12-01

    In this benchmark study, 26 investigators were asked to characterize the kinetics and affinities of 10 sulfonamide inhibitors binding to the enzyme carbonic anhydrase II using Biacore optical biosensors. A majority of the participants collected data that could be fit to a 1:1 interaction model, but a subset of the data sets obtained from some instruments were of poor quality. The experimental errors in the k(a), k(d), and K(D) parameters determined for each of the compounds averaged 34, 24, and 37%, respectively. As expected, the greatest variation in the reported constants was observed for compounds with exceptionally weak affinity and/or fast association rates. The binding constants determined using the biosensor correlated well with solution-based titration calorimetry measurements. The results of this study provide insight into the challenges, as well as the level of experimental variation, that one would expect to observe when using Biacore technology for small molecule analyses.

  14. Modeling error in experimental assays using the bootstrap principle: understanding discrepancies between assays using different dispensing technologies.

    Science.gov (United States)

    Hanson, Sonya M; Ekins, Sean; Chodera, John D

    2015-12-01

    All experimental assay data contains error, but the magnitude, type, and primary origin of this error is often not obvious. Here, we describe a simple set of assay modeling techniques based on the bootstrap principle that allow sources of error and bias to be simulated and propagated into assay results. We demonstrate how deceptively simple operations--such as the creation of a dilution series with a robotic liquid handler--can significantly amplify imprecision and even contribute substantially to bias. To illustrate these techniques, we review an example of how the choice of dispensing technology can impact assay measurements, and show how large contributions to discrepancies between assays can be easily understood and potentially corrected for. These simple modeling techniques--illustrated with an accompanying IPython notebook--can allow modelers to understand the expected error and bias in experimental datasets, and even help experimentalists design assays to more effectively reach accuracy and imprecision goals.

  15. Investments in Fossil Energy Technology: How the Government's Fossil Energy R&D Program Has Made a Difference

    Science.gov (United States)

    1997-03-01

    America has the technological capacity to change its energy future. There is no reason, for example, why our nation must continue following a path of rising oil imports when billions of barrels of crude oil remain in domestic oil fields. There is no reason why we cannot continue to use our abundant supplies of high-value, low-cost coal when we have the scientific know-how to remove virtually all of its pollutants and reduce greenhouse gas emissions. There is no reason why we cannot turn increasingly to clean-burning natural gas and tap the huge supplies we know exist within our borders. We remain a nation rich in the fuels that have powered economic growth. Today 85 percent of the energy we use to heat our homes and businesses, generate our electricity, and fuel our vehicles comes from coal, petroleum and natural gas. As we move toward a new century, the contributions of these fuels will grow. By 2015, the United States is likely to require nearly 20 percent more energy than it uses today, and fossil fuels are projected to supply almost 88 percent of the energy Americans will consume. We have the scientific know-how to continue using our fossil fuel wealth without fear of environmental damage or skyrocketing costs. The key is technology - developing cutting edge concepts that are beyond the private sector's current capabilities. Some of the most important innovations in America's energy industry are the results of investments in the Federal government's fossil energy research and development programs. Today, our air and water are cleaner, our economy is stronger, and our industries are more competitive in the global market because these programs have produced results. This booklet summarizes many of these achievements. It is not a comprehensive list by any means. Still, it provides solid evidence that the taxpayers' investment in government fossil energy research has paid real and measurable dividends.

  16. Mining Frequent Itemsets with Weights over Data Stream Using Inverted Matrix

    Directory of Open Access Journals (Sweden)

    Long Nguyen Hung

    2016-10-01

    Full Text Available In recent years, the mining research over data stream has been prominent as they can be applied in many alternative areas in the real worlds. In this paper, we have proposed an algorithm called MFIWDSIM for mining frequent itemsets with weights over a data stream using Inverted Matrix [10]. The main idea is moving data stream to an inverted matrix saved in the computer disks so that the algorithms can mine on it many times with different support thresholds as well as alternative minimum weights. Moreover, this inverted matrix can be accessed to mine in different times for user’s requirements without recalculation. By analyzing and evaluating, the MFIWDSIM can be seen as the better algorithm compared to WSWFP-stream [9] for mining frequent itemsets with weights over data stream.

  17. Publics in the making: mediating different methods of engagement and the publics these construct : commentary on: "Technologies of democracy: experiments and demonstrations".

    Science.gov (United States)

    Mohr, Alison

    2011-12-01

    The potential for public engagement to democratise science has come under increasing scrutiny amid concerns that conflicting motivations have led to confusion about what engagement means to those who mediate science and publics. This raises important yet relatively unexplored questions regarding how publics are constituted by different forms of engagement used by intermediary scholars and other actors. It is possible to identify at least two possible 'rationalities of mediation' that mobilise different versions of the public and the roles they are assumed to play, as 'citizens' or 'users', in discussions around technology. However, combinations of rationalities are found in practice and these have significant implications for the 'new' scientific democracy.

  18. Sensemaking technologies

    DEFF Research Database (Denmark)

    Madsen, Charlotte Øland

    & Brass, 1990; Kling 1991; Orlikowski 2000). It also demonstrates that technology is a flexible variable adapted to the organisation's needs, culture, climate and management philosophy, thus leading to different uses and outcomes of the same technology in different organisations (Barley 1986; 1990......, Orlikowski 2000). Viewing the use of technology as a process of enactment opens up for investigating the social processes of interpreting new technology into the organisation (Orlikowski 2000). The scope of the PhD project will therefore be to gain a deeper understanding of how the enactment of new...

  19. 基于频繁链表的频繁集的挖掘算法%An Algorithm of Mining Frequent Set Based on Frequent Link

    Institute of Scientific and Technical Information of China (English)

    袁鼎荣; 张师超

    2003-01-01

    The problem of mining frequent set is a key issue in data mining. In this paper, a new method of miningfrequent set based on the frequent link is proposed. The algorithm constructs alternate frequent link from the transac-tion, the alternate link is yielded by adding up the alternate frequent link which constructed by scanning the transac-tion database in proper order. The frequent link that comprises all the information is constructed with the frequentnode which is selected according requirement. Our algorithm need to scan the transaction database only once and easysupervises the change of frequent set in order to guarantee the right of association rule.

  20. A Health Technology Assessment: laparoscopy versus colpoceliotomy.

    Science.gov (United States)

    Damonti, A; Ferrario, L; Morelli, P; Mussi, M; Patregnani, C; Garagiola, E; Foglia, E; Pagani, R; Carminati, R; Porazzi, E

    2015-01-01

    The objective of this paper is the comparison between two different technologies used for the removal of a uterine myoma, a frequent benign tumor: the standard technology currently used, laparoscopy, and an innovative one, colpoceliotomy. It was considered relevant to evaluate the real and the potential effects of the two technologies implementation and, in addition, the consequences that the introduction or exclusion of the innovative technology would have for both the National Health System (NHS) and the entire community. The comparison between these two different technologies, the standard and the innovative one, was conducted using a Health Technology Assessment (HTA). In particular, in order to analyse their differences, a multi-dimensional approach was considered: effectiveness, costs and budget impact analysis data were collected, applying different instruments, such as the Activity Based Costing methodology (ABC), the Cost-Effectiveness Analysis (CEA) and the Budget Impact Analysis (BIA). Organisational, equity and social impact were also evaluated. The results showed that the introduction of colpoceliotomy would provide significant economic savings to the Regional and National Health Service; in particular, a saving of € 453.27 for each surgical procedure. The introduction of the innovative technology, colpoceliotomy, could be considered a valuable tool; one offering many advantages related to less invasiveness and a shorter surgical procedure than the standard technology currently used (laparoscopy).

  1. New Technologies Smart, or Harm Work-Family Boundaries Management? Gender Differences in Conflict and Enrichment Using the JD-R Theory.

    Science.gov (United States)

    Ghislieri, Chiara; Emanuel, Federica; Molino, Monica; Cortese, Claudio G; Colombo, Lara

    2017-01-01

    Background: The relationship between technology-assisted supplemental work and well-being outcomes is a recent issue in scientific literature. Whether the use of technology for work purpose in off-work time may have a positive or negative impact on work-family balance remains an open question and the role of gender in this relationship is poorly understood. Aim: According to the JD-R theory, this study aimed to investigate the relationship between off-work hours technology assisted job demand (off-TAJD) and both work-family conflict (WFC) and work-family enrichment (WFE). Moreover, it considered two general job demands, workload and emotional dissonance, and one job resource, supervisory coaching. Method: The hypotheses were tested with a convenience sample of 671 workers. Data were collected with a self-report questionnaire and analyzed with SPSS 23 and through multi-group structural equation model (SEM) (Mplus 7). Results: The estimated SEM [Chi-square (510) = 1041.29; p < 0.01; CFI = 0.95; TLI = 0.95; RMSEA = 0.06 (0.05, 0.06); SRMR = 0.05. M = 319/F = 352] showed that off-TAJD was positively related to WFC in both subsamples; off-TAJD was positively related also to WFE only in the Male group. Workload was positively related to WFC in both Male and Female subsamples. Emotional dissonance was positively related to WFC in both subsamples and was negatively related to WFE. Supervisory coaching was strongly, positively related to WFE in both groups, and only in the Male subsample presented a low negative relationship with WFC. Conclusion: This study contributes to the literature on new challenges in work-life interface by analyzing the association between off-TAJD and WFC and Enrichment. Our findings suggest it is important to pay attention to gender differences in the study of the impact of supplemental work carried out during off-work hours using technology on the work-life interface. In fact, employee perception of Company demands of being available during off

  2. New Technologies Smart, or Harm Work-Family Boundaries Management? Gender Differences in Conflict and Enrichment Using the JD-R Theory

    Directory of Open Access Journals (Sweden)

    Chiara Ghislieri

    2017-06-01

    Full Text Available Background: The relationship between technology-assisted supplemental work and well-being outcomes is a recent issue in scientific literature. Whether the use of technology for work purpose in off-work time may have a positive or negative impact on work-family balance remains an open question and the role of gender in this relationship is poorly understood.Aim: According to the JD-R theory, this study aimed to investigate the relationship between off-work hours technology assisted job demand (off-TAJD and both work-family conflict (WFC and work-family enrichment (WFE. Moreover, it considered two general job demands, workload and emotional dissonance, and one job resource, supervisory coaching.Method: The hypotheses were tested with a convenience sample of 671 workers. Data were collected with a self-report questionnaire and analyzed with SPSS 23 and through multi-group structural equation model (SEM (Mplus 7.Results: The estimated SEM [Chi-square (510 = 1041.29; p < 0.01; CFI = 0.95; TLI = 0.95; RMSEA = 0.06 (0.05, 0.06; SRMR = 0.05. M = 319/F = 352] showed that off-TAJD was positively related to WFC in both subsamples; off-TAJD was positively related also to WFE only in the Male group. Workload was positively related to WFC in both Male and Female subsamples. Emotional dissonance was positively related to WFC in both subsamples and was negatively related to WFE. Supervisory coaching was strongly, positively related to WFE in both groups, and only in the Male subsample presented a low negative relationship with WFC.Conclusion: This study contributes to the literature on new challenges in work-life interface by analyzing the association between off-TAJD and WFC and Enrichment. Our findings suggest it is important to pay attention to gender differences in the study of the impact of supplemental work carried out during off-work hours using technology on the work-life interface. In fact, employee perception of Company demands of being available

  3. Barriers to the Diffusion of Solar Thermal Technologies

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    Despite its considerable potential in household, domestic and industry sectors, the possible contribution of solar heat is often neglected in many academic and institutional energy projections and scenarios. This is best explained by the frequent failure to distinguish heat and work as two different forms of energy transfers. As a result, policy makers in many countries or States have tended to pay lesser attention to solar thermal technologies than to other renewable energy technologies.

  4. Barriers to Technology Diffusion: The Case of Compact Fluorescent Lamps

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    Despite its considerable potential in household, domestic and industry sectors, the possible contribution of solar heat is often neglected in many academic and institutional energy projections and scenarios. This is best explained by the frequent failure to distinguish heat and work as two different forms of energy transfers. As a result, policy makers in many countries or States have tended to pay lesser attention to solar thermal technologies than to other renewable energy technologies.

  5. Frequent hypermethylation of DBC1 in malignant lymphoproliferative neoplasms

    DEFF Research Database (Denmark)

    Grønbæk, Karin Elmegård; Ralfkiaer, U.; Dahl, C.

    2008-01-01

    follicular lymphomas, 5 of 5 mantle cell lymphomas, 4 of 4 small lymphocytic lymphomas, 1 of 2 lymphoplasmacytoid lymphomas, and in 12 of 12 acute lymphoblastic leukemias, but was unmethylated in 1 case of splenic marginal zone lymphoma, in 12 of 12 multiple myelomas, in 24 of 24 reactive lymph nodes......Allelic loss at chromosome 9q31-34 is a frequent event in many lymphoproliferative malignancies. Here, we examined DBC1 at 9q33.1 as a potential target in lymphomagenesis. DBC1 is a putative tumor suppressor that has been shown to be involved in the regulation of cell growth and programmed cell...... death. The methylation status of the DBC1 promoter CpG island was examined by methylation-specific PCR, bisulfite sequencing, and methylation-specific melting curve analysis. DBC1 was hypermethylated in 5 of 5 B-cell-derived lymphoma cell lines, 41 of 42 diffuse large B-cell lymphomas, 24 of 24...

  6. Smartphone gaming and frequent use pattern associated with smartphone addiction

    Science.gov (United States)

    Liu, Chun-Hao; Lin, Sheng-Hsuan; Pan, Yuan-Chien; Lin, Yu-Hsuan

    2016-01-01

    Abstract The aim of this study was to investigate the risk factors of smartphone addiction in high school students. A total of 880 adolescents were recruited from a vocational high school in Taiwan in January 2014 to complete a set of questionnaires, including the 10-item Smartphone Addiction Inventory, Chen Internet Addiction Scale, and a survey of content and patterns of personal smartphone use. Of those recruited, 689 students (646 male) aged 14 to 21 and who owned a smartphone completed the questionnaire. Multiple linear regression models were used to determine the variables associated with smartphone addiction. Smartphone gaming and frequent smartphone use were associated with smartphone addiction. Furthermore, both the smartphone gaming-predominant and gaming with multiple-applications groups showed a similar association with smartphone addiction. Gender, duration of owning a smartphone, and substance use were not associated with smartphone addiction. Our findings suggest that smartphone use patterns should be part of specific measures to prevent and intervene in cases of excessive smartphone use. PMID:27428191

  7. Chest Pain: The Need to Consider Less Frequent Diagnosis

    Directory of Open Access Journals (Sweden)

    Pedro Magalhães

    2016-01-01

    Full Text Available Chest pain is one of the most frequent patient’s complaints. The commonest underlying causes are well known, but, sometimes, in some clinical scenarios, it is necessary to consider other diagnoses. We report a case of a 68-year-old Caucasian male, chronically hypertensive, who complained of recurrent episodes of chest pain and fever with elevated acute phase reactants. The first investigation was negative for some of the most likely diagnosis and he quickly improved with anti-inflammatory drugs. Over a few months, his symptoms continued to recur periodically, his hypertension was aggravated, and he developed headaches and lower limbs claudication. After a temporal artery biopsy that was negative for vasculitis, he underwent a positron emission tomography suggestive of Takayasu Arteritis. Takayasu Arteritis is a rare chronic granulomatous vasculitis of the aorta and its first-order branches affecting mostly females up to 50 years old. Chest pain is experienced by >40% of the patients and results from the inflammation of the aorta, pulmonary artery, or coronaries.

  8. Gnathostomiasis in a patient who frequently consumes sushi.

    Science.gov (United States)

    Jarell, Abel D; Dans, Michael J; Elston, Dirk M; Mathison, Blaine A; Ruben, Beth S

    2011-12-01

    A 45-year-old woman presented for evaluation of a solitary pruritic nodule on the abdomen that suddenly appeared 3 weeks before. She was healthy without a significant medical history, travel history, exposures, medications, or pets. She reported that she consumed sushi at least weekly in the city of San Francisco. A punch biopsy revealed a superficial and deep perivascular and interstitial infiltrates consisting of lymphocytes, plasma cells, and many eosinophils. Most notably, there was a parasite centered in the reticular dermis with prominent lateral chords, a well-developed muscular esophagus, and an intestine that contained a brush border and multinucleate cells. Evaluation of these histological sections by the Centers for Disease Control and Prevention determined the parasite to be a nematode of the genus Gnathostoma. The patient underwent a systemic work-up for gnathostomiasis, including imaging, and no other abnormalities were found. She completed a 3-week course of albendazole and has remained asymptomatic since the biopsy of her abdominal lesion. Although gnathostomiasis is often a systemic illness, this patient did well with apparently only localized cutaneous disease. Gnathostomiasis should be considered in patients who present with nonspecific papules and nodules, especially when there is a history of frequent consumption of raw fish.

  9. Salt tolerance evolves more frequently in C4 grass lineages.

    Science.gov (United States)

    Bromham, L; Bennett, T H

    2014-03-01

    Salt tolerance has evolved many times in the grass family, and yet few cereal crops are salt tolerant. Why has it been so difficult to develop crops tolerant of saline soils when salt tolerance has evolved so frequently in nature? One possible explanation is that some grass lineages have traits that predispose them to developing salt tolerance and that without these background traits, salt tolerance is harder to achieve. One candidate background trait is photosynthetic pathway, which has also been remarkably labile in grasses. At least 22 independent origins of the C4 photosynthetic pathway have been suggested to occur within the grass family. It is possible that the evolution of C4 photosynthesis aids exploitation of saline environments, because it reduces transpiration, increases water-use efficiency and limits the uptake of toxic ions. But the observed link between the evolution of C4 photosynthesis and salt tolerance could simply be due to biases in phylogenetic distribution of halophytes or C4 species. Here, we use a phylogenetic analysis to investigate the association between photosynthetic pathway and salt tolerance in the grass family Poaceae. We find that salt tolerance is significantly more likely to occur in lineages with C4 photosynthesis than in C3 lineages. We discuss the possible links between C4 photosynthesis and salt tolerance and consider the limitations of inferring the direction of causality of this relationship.

  10. Chest Pain: The Need to Consider Less Frequent Diagnosis

    Science.gov (United States)

    Morais, Anabela; Carvalho, Sofia; Cunha, Joana; Lima, Ana R.; Moreira, J. Ilídio; Faria, Trigo

    2016-01-01

    Chest pain is one of the most frequent patient's complaints. The commonest underlying causes are well known, but, sometimes, in some clinical scenarios, it is necessary to consider other diagnoses. We report a case of a 68-year-old Caucasian male, chronically hypertensive, who complained of recurrent episodes of chest pain and fever with elevated acute phase reactants. The first investigation was negative for some of the most likely diagnosis and he quickly improved with anti-inflammatory drugs. Over a few months, his symptoms continued to recur periodically, his hypertension was aggravated, and he developed headaches and lower limbs claudication. After a temporal artery biopsy that was negative for vasculitis, he underwent a positron emission tomography suggestive of Takayasu Arteritis. Takayasu Arteritis is a rare chronic granulomatous vasculitis of the aorta and its first-order branches affecting mostly females up to 50 years old. Chest pain is experienced by >40% of the patients and results from the inflammation of the aorta, pulmonary artery, or coronaries. PMID:27034853

  11. Evidence and Implications of Frequent Fires in Ancient Shrub Tundra

    Energy Technology Data Exchange (ETDEWEB)

    Higuera, P E; Brubaker, L B; Anderson, P M; Brown, T A; Kennedy, A T; Hu, F S

    2008-03-06

    Understanding feedbacks between terrestrial and atmospheric systems is vital for predicting the consequences of global change, particularly in the rapidly changing Arctic. Fire is a key process in this context, but the consequences of altered fire regimes in tundra ecosystems are rarely considered, largely because tundra fires occur infrequently on the modern landscape. We present paleoecological data that indicate frequent tundra fires in northcentral Alaska between 14,000 and 10,000 years ago. Charcoal and pollen from lake sediments reveal that ancient birchdominated shrub tundra burned as often as modern boreal forests in the region, every 144 years on average (+/- 90 s.d.; n = 44). Although paleoclimate interpretations and data from modern tundra fires suggest that increased burning was aided by low effective moisture, vegetation cover clearly played a critical role in facilitating the paleo-fires by creating an abundance of fine fuels. These records suggest that greater fire activity will likely accompany temperature-related increases in shrub-dominated tundra predicted for the 21st century and beyond. Increased tundra burning will have broad impacts on physical and biological systems as well as land-atmosphere interactions in the Arctic, including the potential to release stored organic carbon to the atmosphere.

  12. Frequently asked questions about family medicine in India.

    Science.gov (United States)

    Kumar, Raman

    2016-01-01

    Family medicine (FM) is an independent and distinct medical specialty in the developed countries such as USA, UK, Australia, and Canada since 1960s. FM teaching is imparted at undergraduate and postgraduate levels in countries such as Nepal, Pakistan, and Sri Lanka. Family practice is the practicing vocation of the majority doctors in India. The practitioners of FM include general practitioners, family physicians, FM specialists, and medical officers in the public sector. Medical students are largely unaware about FM career as this concept is not introduced at MBBS level. Faculty and senior doctors from other disciplines are also not able to answer the queries related to FM as they themselves also have gone through the same education system for last three decades, largely unexposed to the concept of academic family medicine. This article is a compilation of frequently asked questions, and their appropriate responses, presented here to dispel myths and misinformation about FM specialty. The answers are deliberated upon by Dr. Raman Kumar the founder president of the Academy of Family Physicians of India and the chief editor of the Journal of Family Medicine and Primary Care. This article was originally published as an interview in Docplexus, a popular online network and website for medical doctors in November 2015.

  13. Smartphone gaming and frequent use pattern associated with smartphone addiction.

    Science.gov (United States)

    Liu, Chun-Hao; Lin, Sheng-Hsuan; Pan, Yuan-Chien; Lin, Yu-Hsuan

    2016-07-01

    The aim of this study was to investigate the risk factors of smartphone addiction in high school students.A total of 880 adolescents were recruited from a vocational high school in Taiwan in January 2014 to complete a set of questionnaires, including the 10-item Smartphone Addiction Inventory, Chen Internet Addiction Scale, and a survey of content and patterns of personal smartphone use. Of those recruited, 689 students (646 male) aged 14 to 21 and who owned a smartphone completed the questionnaire. Multiple linear regression models were used to determine the variables associated with smartphone addiction.Smartphone gaming and frequent smartphone use were associated with smartphone addiction. Furthermore, both the smartphone gaming-predominant and gaming with multiple-applications groups showed a similar association with smartphone addiction. Gender, duration of owning a smartphone, and substance use were not associated with smartphone addiction.Our findings suggest that smartphone use patterns should be part of specific measures to prevent and intervene in cases of excessive smartphone use.

  14. The semiology of febrile seizures: Focal features are frequent.

    Science.gov (United States)

    Takasu, Michihiko; Kubota, Tetsuo; Tsuji, Takeshi; Kurahashi, Hirokazu; Numoto, Shingo; Watanabe, Kazuyoshi; Okumura, Akihisa

    2017-08-01

    To clarify the semiology of febrile seizures (FS) and to determine the frequency of FS with symptoms suggestive of focal onset. FS symptoms in children were reported within 24h of seizure onset by the parents using a structured questionnaire consisting principally of closed-ended questions. We focused on events at seizure commencement, including changes in behavior and facial expression, and ocular and oral symptoms. We also investigated the autonomic and motor symptoms developing during seizures. The presence or absence of focal and limbic features was determined for each patient. The associations of certain focal and limbic features with patient characteristics were assessed. Information was obtained on FS in 106 children. Various events were recorded at seizure commencement. Behavioral changes were observed in 35 children, changes in facial expression in 53, ocular symptoms in 78, and oral symptoms in 90. In terms of events during seizures, autonomic symptoms were recognized in 78, and convulsive motor symptoms were recognized in 68 children. Focal features were evident in 81 children; 38 children had two or more such features. Limbic features were observed in 44 children, 9 of whom had two or more such features. There was no significant relationship between any patient characteristic and the numbers of focal or limbic features. The semiology of FS varied widely among children, and symptoms suggestive of focal onset were frequent. FS of focal onset may be more common than is generally thought. Copyright © 2017 Elsevier Inc. All rights reserved.

  15. Frequent gain and loss of functional transcription factor binding sites.

    Directory of Open Access Journals (Sweden)

    Scott W Doniger

    2007-05-01

    Full Text Available Cis-regulatory sequences are not always conserved across species. Divergence within cis-regulatory sequences may result from the evolution of species-specific patterns of gene expression or the flexible nature of the cis-regulatory code. The identification of functional divergence in cis-regulatory sequences is therefore important for both understanding the role of gene regulation in evolution and annotating regulatory elements. We have developed an evolutionary model to detect the loss of constraint on individual transcription factor binding sites (TFBSs. We find that a significant fraction of functionally constrained binding sites have been lost in a lineage-specific manner among three closely related yeast species. Binding site loss has previously been explained by turnover, where the concurrent gain and loss of a binding site maintains gene regulation. We estimate that nearly half of all loss events cannot be explained by binding site turnover. Recreating the mutations that led to binding site loss confirms that these sequence changes affect gene expression in some cases. We also estimate that there is a high rate of binding site gain, as more than half of experimentally identified S. cerevisiae binding sites are not conserved across species. The frequent gain and loss of TFBSs implies that cis-regulatory sequences are labile and, in the absence of turnover, may contribute to species-specific patterns of gene expression.

  16. Sampling circulating tumor cells for clinical benefits: how frequent?

    Science.gov (United States)

    Leong, Sai Mun; Tan, Karen M L; Chua, Hui Wen; Tan, Doreen; Fareda, Delly; Osmany, Saabry; Li, Mo-Huang; Tucker, Steven; Koay, Evelyn S C

    2015-06-25

    Circulating tumor cells (CTCs) are cells shed from tumors or metastatic sites and are a potential biomarker for cancer diagnosis, management, and prognostication. The majority of current studies use single or infrequent CTC sampling points. This strategy assumes that changes in CTC number, as well as phenotypic and molecular characteristics, are gradual with time. In reality, little is known today about the actual kinetics of CTC dissemination and phenotypic and molecular changes in the blood of cancer patients. Herein, we show, using clinical case studies and hypothetical simulation models, how sub-optimal CTC sampling may result in misleading observations with clinical consequences, by missing out on significant CTC spikes that occur in between sampling times. Initial studies using highly frequent CTC sampling are necessary to understand the dynamics of CTC dissemination and phenotypic and molecular changes in the blood of cancer patients. Such an improved understanding will enable an optimal, study-specific sampling frequency to be assigned to individual research studies and clinical trials and better inform practical clinical decisions on cancer management strategies for patient benefits.

  17. 不同调查方法森林资源调查结果的整合技术研究%Integration Technology Research of Survey Results of Forest Resources of Different Methods

    Institute of Scientific and Technical Information of China (English)

    朱磊

    2012-01-01

    At present, Most places get different survey results of forest resources for different survey methods, managers of Forest resources frequently encountered problems, which results are used on different occasions. How to integrate survey results are becoming urgent problems for forest resources management departments and academic experts. The author use geographic information system technology, get feature of sample plot through small class of the class II survey, and Stretch or compress the data of sample plot, thus realize integration of the class I survey and the class II survey.%目前各地普遍存在一类清查和二类调查"两套数"、"两张皮"的现象,给森林资源管理带来很大不便。如何将一类清查成果和二类调查成果进行有效整合,成为森林资源管理部门和学术界专家共同期待解决的燃眉问题。利用地理信息系统技术,将基于小班的二类成果面状数据转化为基于样地的点状数据,以一类数据为控制,根据二套数据的差值对加密样地数据进行拉伸或压缩,从而实现两套数的技术性整合。

  18. [The Stability and Measuring Technology of the Maximum Optical Path Difference of Photo-Elastic Modulator Interferograms].

    Science.gov (United States)

    Zhang, Min-juan; Wang, Zhi-bin; Li, Xiao; Li, Jin-hua; Wang, Yan-chao

    2015-05-01

    In order to improve the accuracy and stability of the rebuilt spectrums, it is necessary that stability analysis and nicety measuring of the maximum optical path difference of interferograms in the photo-elastic modulator Fourier transform spectrometers(PEM-FTS). The maximum optical difference of interferograms is uncertain parameter, and it is relate to the resonant state, characteristic of frequency-thermal drift and driving voltage of PEM. Therefore, based on the principle of photo-elastic modulator Fourier transform interferometer, the model of the freguency-thermal drift is built, and the variety of the maximum optical path difference is analyzed; A measuring method of the maximum optical path difference is put forward, which is zero-crossing counting of laser's interference signal when the driving signal of PEM is as the standard. In the method the dual channel high-speed comparator and FPGA are used to transform sine wave to square wave, to realize zero-crossing trigger counting and errors compensation. On the condition that the 670. 8 nm laser is as the power source to produce the reference interferograms by the PEM interferometer, the 77. 471 µm maximum optical path difference could be measured by the zero-crossing counting the measuring errors is less than 0. 167 nm, the rebuilt spectral peak wavelength errors of the infrared blackbody is less than 2 nm. the result is content with PEM-FTS.

  19. Frequent underwater volcanism in the central Aegean Sea

    Science.gov (United States)

    Huebscher, C.; Ruhnau, M.; Dehghani, G. A.

    2012-04-01

    The extinction of the Minoan culture in the mid second millennium BCE is a well known consequence of the Plinian eruption of Thera volcano (Santorini Island). Santorini is a member of the South Aegean arc forming a chain from the Gulf of Saronikos (Susaki, Egina, Poros, Methana) at West, to an area close to the Anatolian coast at East (Kos, Nisyros and minor islands), through the central part (Milos and Santorini island groups). Underwater volcanic activity was manifested historically only once. During 1649-1650 CE the Kolumbo underwater volcano evolved about 8 km northeast of Santorini. As a consequence of this eruption volcanic ash covered the entire Aegean area and a hazardous tsunami was triggered. Here we show by means of reflection seismic and magnetic data that underwater volcanism occurred more frequently in the central Aegean Sea than previously assumed. Seismic data show that Kolumbo constitutes of five vertically stacked cones of pyroclastic sediment plus at least four smaller cones on the flank of the volcano. The formation of Kolumbo started synchronous with Santorini Island. The entire volume of the Kolumbo pyroclastic cones is estimated to more than 15 cubic-kilometers. Several small-scale cones have been detected in the Anyhdros Basin some km north-east of Kolumbo, being previously interpreted as mud volcanoes by other authors. However, the similarity of seismic and magnetic signatures of these cones and Kolumbo strongly suggest that these cones were also created by underwater volcanism. Volcanic cones, Kolumbo and Santorini are situated along a NE-SW striking graben system that evolved during five extensional tectonic pulses in the Pliocene.

  20. Frequent occurrence of uniparental disomy in colorectal cancer.

    Science.gov (United States)

    Andersen, Claus Lindbjerg; Wiuf, Carsten; Kruhøffer, Mogens; Korsgaard, Marianne; Laurberg, Søren; Ørntoft, Torben Falck

    2007-01-01

    We used SNP arrays to identify and characterize genomic alterations associated with colorectal cancer (CRC). Laser microdissected cancer cells from 15 adenocarinomas were investigated by Affymetrix Mapping 10K SNP arrays. Analysis of the data extracted from the SNP arrays revealed multiple regions with copy number alterations and loss of heterozygosity (LOH). Novel LOH areas were identified at chromosomes 13, 14 and 15. Combined analysis of the LOH and copy number data revealed genomic structures that could not have been identified analyzing either data type alone. Half of the identified LOH regions showed no evidence of a reduced copy number, indicating the presence of uniparental structures. The distribution of these structures was non-random, primarily involving 8q, 13q and 20q. This finding was supported by analysis of an independent set of array-based transcriptional profiles, consisting of 17 normal mucosa and 66 adenocarcinoma samples. The transcriptional analysis revealed an unchanged expression level in areas with intact copy number, including regions with uniparental disomy, and a reduced expression level in the LOH regions representing factual losses (including 5q, 8p and 17p). The analysis also showed that genes in regions with increased copy number (including 7p and 20q) were predominantly upregulated. Further analyses of the SNP data revealed a subset of the identified alterations to be specifically associated with TP53 inactivation (including 8q gain and 17p loss) and lymph node metastasis status (gain of 7q and 13q). Another subset of the identified alterations was shown to represent intratumor heterogeneity. In conclusion, we demonstrate that uniparental disomy is frequent in CRC, and identify genomic alterations associated with TP53 inactivation and lymph node status.

  1. Analysis of Wearable and Smartphone-Based Technologies for the Measurement of Barbell Velocity in Different Resistance Training Exercises.

    Science.gov (United States)

    Balsalobre-Fernández, Carlos; Marchante, David; Baz-Valle, Eneko; Alonso-Molero, Iván; Jiménez, Sergio L; Muñóz-López, Mario

    2017-01-01

    The purpose of this study was to analyze the validity, reliability, and accuracy of new wearable and smartphone-based technology for the measurement of barbell velocity in resistance training exercises. To do this, 10 highly trained powerlifters (age = 26.1 ± 3.9 years) performed 11 repetitions with loads ranging 50-100% of the 1-Repetition maximum in the bench-press, full-squat, and hip-thrust exercises while barbell velocity was simultaneously measured using a linear transducer (LT), two Beast wearable devices (one placed on the subjects' wrist -BW-, and the other one directly attached to the barbell -BB-) and the iOS PowerLift app. Results showed a high correlation between the LT and BW (r = 0.94-0.98, SEE = 0.04-0.07 m•s(-1)), BB (r = 0.97-0.98, SEE = 0.04-0.05 m•s(-1)), and the PowerLift app (r = 0.97-0.98, SEE = 0.03-0.05 m•s(-1)) for the measurement of barbell velocity in the three exercises. Paired samples T-test revealed systematic biases between the LT and BW, BB and the app in the hip-thrust, between the LT and BW in the full-squat and between the LT and BB in the bench-press exercise (p measurement of the two repetitions performed with each load were almost the same than that observed with the LT (ICC = 0.937-0.990). Both the Beast wearable device and the PowerLift app were highly valid, reliable, and accurate for the measurement of barbell velocity in the bench-press, full-squat, and hip-thrust exercises. These results could have potential practical applications for strength and conditioning coaches who wish to measure barbell velocity during resistance training.

  2. Designing and optimization of a micro CHP system based on Solid Oxide Fuel Cell with different fuel processing technologies

    DEFF Research Database (Denmark)

    Liso, Vincenzo; Nielsen, Mads Pagh; Kær, Søren Knudsen

    2009-01-01

    of the Micro Combined Heat and Power plant (mCHP) will be identified including fuel and air supply, fuel management anode re-circulation, exhaust gas heat management, power conditioning and control system. Using mass and energy balance, different types of fuel reforming including steam reforming...

  3. Graphic Comprehension and Interpretation Skills of Preservice Teachers with Different Learning Approaches in a Technology-Aided Learning Environment

    Science.gov (United States)

    Çelik, Harun; Pektas, Hüseyin Miraç

    2017-01-01

    A one-group quasi-experimental design and survey methodology were used to investigate the effect of virtual laboratory practices on preservice teachers' (N = 29) graphic comprehension and interpretation skills with different learning approaches. Pretest and posttest data were collected with the Test of Understanding Kinematic Graphs. The Learning…

  4. Graphic Comprehension and Interpretation Skills of Preservice Teachers with Different Learning Approaches in a Technology-Aided Learning Environment

    Science.gov (United States)

    Çelik, Harun; Pektas, Hüseyin Miraç

    2017-01-01

    A one-group quasi-experimental design and survey methodology were used to investigate the effect of virtual laboratory practices on preservice teachers' (N = 29) graphic comprehension and interpretation skills with different learning approaches. Pretest and posttest data were collected with the Test of Understanding Kinematic Graphs. The Learning…

  5. The association between technology type and diffusion pattern under duopolistic competition

    Directory of Open Access Journals (Sweden)

    Tsou Ching-Shih

    2007-01-01

    Full Text Available Many firms consider adopting new technologies as a means for enhancing competitive advantages. Therefore, the subject of technology diffusion has been studied by many researchers from different disciplines in order to explore the diffusion profiles throughout the industry or the country. The argument has frequently been made that the pattern of diffusion associated with most new technologies will typically have certain characteristics. In general, the diffusion pattern within an industry will depend on the competitive arena and technology characteristics. Based on a duopolistic game-theoretic model, this paper tries to explore the association between technology type and diffusion pattern. The results show that the cost-reducing technologies are adopted sequentially within a duopoly. On the other hard, strategic technologies diffuse over time or in a swarm. Although both technologies might be adopted sequentially, the rate for strategic technologies is faster than that for cost-reducing technologies. .

  6. Consumo frequente de bebidas alcoólicas por adolescentes escolares: estudo de fatores associados Frequent consumption of alcohol by school age adolescents: study of associated factors

    Directory of Open Access Journals (Sweden)

    Analy Marquardt de Matos

    2010-06-01

    Full Text Available OBJETIVO: Analisar fatores associados ao consumo frequente de bebidas alcoólicas por adolescentes escolares em Feira de Santana, BA. MÉTODO: Estudo transversal, com amostra aleatória, estratificada por conglomerado, totalizando 10 escolas de portes diferenciados e 776 estudantes de ambos os sexos que relataram consumo de bebidas alcoólicas, na faixa etária de 14 a 19 anos, assegurando representatividade das escolas e alunos. O instrumento auto-aplicável foi elaborado segundo a Organização Mundial de Saúde (OMS e questionários validados em outros estudos. A coleta garantiu procedimentos para anonimato e sigilo. Foram considerados expostos adolescentes que referiram consumo frequente (em pelo menos todo final de semana. RESULTADOS: O consumo frequente/pesado mostrou associações significantes com sexo masculino, consumo precoce, parceiro sexual pouco conhecido, problemas com substâncias psicoativas (SPAs na família, coabitação com companheiro, renda própria, tráfico de drogas, consumo com amigos, atividades na escola, motivações (ansiedade, animação/prazer; e consequências (outras SPAs, brigas, inadimplência ao trabalhoescola. CONCLUSÕES: O conhecimento dos fatores pessoais, interpessoais, familiares e ambientais associados ao consumo de bebidas alcoólicas por adolescentes devem ser considerados na implementação de programas escolares e políticas públicas de prevenção, visando comportamentos que minimizem a exposição ao risco associado.OBJECTIVES: To analyze factors associated with the frequent consumption of alcohol by school age adolescents in Feira de Santana, Bahia. METHOD: Cross sectional study with random sampling, stratified by clusters, totaling 10 schools of different sizes. Although 1,409 students were included in the sample, only 776 of both genders, aged 14 to 19 years who reported alcohol drinking were included in the analysis, providing representativeness of schools and students. Data collection tools

  7. Hyperlipidemia in migraine: Is it more frequent in migraineurs?

    Directory of Open Access Journals (Sweden)

    Nasim Ghorbannejad

    2011-08-01

    Full Text Available Background: Some coincidental disorders with migrainehave been introduced that may have role in itspathogenesis or aggravation. In this study we determinedthe relative frequency of hyperlipidemia as a coincidentaldisorder in patients affected by migraine.Methods: A total of 102 migraine-affected patientsaccording to International Headache Society (HIS criteriaand 103 control subjects adjusted for age participated inthis case-control study. Their serum level of triglyceride,total cholesterol, low density lipoprotein cholesterol (LDL-Cand high density lipoprotein cholesterol (HDL-C weremeasured.Results: A total of 84 women and 18 men with mean age of34.9 ± 11.8 years and 79 women and 24 men with mean ageof 32.8 ± 5.7 years constituted case and control groups,respectively. The means of serum triglyceride, totalcholesterol, HDL-C and LDL-C levels in case and controlgroups were 177.0 ± 118.2 versus 108.7 ± 37.2 mg/dl(P = 0.0001, 186.2 ± 44.1 versus 152.9 ± 3.7 mg/dl(P = 0.0001, 49.9 ± 12.5 versus 46.1 ± 10.7 mg/dl (P = 0.023and 104.8 ± 33.7 versus 84.1 ± 34.0 mg/dl (P = 0.0001,respectively. The prevalence of hypertriglyceridemia andhypercholesterolemia in case and control groups were41.2% versus 18.4 % (P = 0.0001, and 36.3% versus 9.7%(P = 0.0001. According to multivariate analysis, odds ratioswere 3.11 (95% CI: 1.4 -6.6 and 17.4 (95% CI: 2.12-138.3,respectively. Odds ratio for low HDL-C was 0.2 (95% CI:0.08-0.49.Conclusion: Hypertriglyceridemia andhypercholesterolemia were more frequent inmigraineurs. Conversely, low HDL-C was less frequentamong the patients compared with non-migraineurs.

  8. Childhood acute leukemias are frequent in Mexico City: descriptive epidemiology

    Directory of Open Access Journals (Sweden)

    Bekker-Méndez Vilma

    2011-08-01

    Full Text Available Abstract Background Worldwide, acute leukemia is the most common type of childhood cancer. It is particularly common in the Hispanic populations residing in the United States, Costa Rica, and Mexico City. The objective of this study was to determine the incidence of acute leukemia in children who were diagnosed and treated in public hospitals in Mexico City. Methods Included in this study were those children, under 15 years of age and residents of Mexico City, who were diagnosed in 2006 and 2007 with leukemia, as determined by using the International Classification of Childhood Cancer. The average annual incidence rates (AAIR, and the standardized average annual incidence rates (SAAIR per million children were calculated. We calculated crude, age- and sex-specific incidence rates and adjusted for age by the direct method with the world population as standard. We determined if there were a correlation between the incidence of acute leukemias in the various boroughs of Mexico City and either the number of agricultural hectares, the average number of persons per household, or the municipal human development index for Mexico (used as a reference of socio-economic level. Results Although a total of 610 new cases of leukemia were registered during 2006-2007, only 228 fit the criteria for inclusion in this study. The overall SAAIR was 57.6 per million children (95% CI, 46.9-68.3; acute lymphoblastic leukemia (ALL was the most frequent type of leukemia, constituting 85.1% of the cases (SAAIR: 49.5 per million, followed by acute myeloblastic leukemia at 12.3% (SAAIR: 6.9 per million, and chronic myeloid leukemia at 1.7% (SAAIR: 0.9 per million. The 1-4 years age group had the highest SAAIR for ALL (77.7 per million. For cases of ALL, 73.2% had precursor B-cell immunophenotype (SAAIR: 35.8 per million and 12.4% had T-cell immunophenotype (SAAIR 6.3 per million. The peak ages for ALL were 2-6 years and 8-10 years. More than half the children (58.8% were

  9. Amiodarone-Induced Pulmonary Toxicity – A Frequently Missed Complication

    Science.gov (United States)

    Sweidan, Alexander J.; Singh, Navneet K.; Dang, Natasha; Lam, Vinh; Datta, Jyoti

    2016-01-01

    INTRODUCTION Amiodarone is often used in the suppression of tachyarrhythmias. One of the more serious adverse effects includes amiodarone pulmonary toxicity (APT). Several pulmonary diseases can manifest including interstitial pneumonitis, organizing pneumonia, acute respiratory distress syndrome, diffuse alveolar hemorrhage, pulmonary nodules or masses, and pleural effusion. Incidence of APT varies from 5–15% and is correlated to dosage, age of the patient, and preexisting lung disease. DESCRIPTION A 56-year-old male with a past medical history of coronary artery disease and chronic obstructive pulmonary disease was admitted for a coronary artery bypass graft. Post-operatively, the patient was admitted to the ICU for ventilator management and continued to receive his home dose of amiodarone 400 mg orally twice daily, which he had been taking for the past 3 months. The patient was found to be hypoxemic with a PaO2 52 mmHg and bilateral infiltrates on chest x-ray. Patient also complained of new onset dyspnea. Physical exam found bilateral rhonchi with bibasilar crackles and subcutaneous emphysema along the left anterior chest wall. Daily chest x-rays showed worsening of bilateral interstitial infiltrates and pleural effusions. A chest high-resolution computed tomography on post-operative day 3 showed extensive and severe bilateral ground glass opacities. APT was suspected and amiodarone was discontinued. A course of oral prednisone without antibiotics was initiated, and after one week of treatment the chest film cleared, the PaO2 value normalized and dyspnea resolved. DISCUSSION APT occurs via cytotoxic T cells and indirectly by immunological reaction. Typically the lungs manifest a diffuse interstitial pneumonitis with varying degrees of fibrosis. Infiltrates with a ‘ground-glass’ appearance appreciated on HRCT are more definitive than chest x-ray. Pulmonary nodules can be seen, frequently in the upper lobes. These are postulated to be accumulations of

  10. Insomnia is a frequent finding in adults with Asperger syndrome

    Directory of Open Access Journals (Sweden)

    von Wendt Lennart

    2003-10-01

    Full Text Available Abstract Background Asperger syndrome (AS is a neurodevelopmental disorder belonging to autism spectrum disorders with prevalence rate of 0,35% in school-age children. It has been most extensively studied in childhood while there is scarcity of reports concerning adulthood of AS subjects despite the lifelong nature of this syndrome. In children with Asperger syndrome the initiation and continuity of sleep is disturbed because of the neuropsychiatric deficits inherent of AS. It is probable that sleep difficulties are present in adulthood as well. Our hypothesis was that adults with AS suffer from difficulty in initiating and maintaining sleep and nonrestorative sleep (insomnia. Methods 20 AS without medication were compared with 10 healthy controls devoid of neuropsychiatric anamnesis. Clinical examination, blood test battery and head MRI excluded confounding somatic illnesses. Structured psychiatric interview for axis-I and axis-II disorders were given to both groups as well as Beck Depression Inventory and Wechsler adult intelligence scale, revised version. Sleep quality was assessed with sleep questionnaire, sleep diary during 6 consecutive days and description of possible sleep problems by the participants own words was requested. Results compared with controls and with normative values of good sleep, AS adults had frequent insomnia. In sleep questionnaire 90% (18/20, in sleep diary 75% (15/20 and in free description 85% (17/20 displayed insomnia. There was a substantial psychiatric comorbidity with only 4 AS subject devoid of other axis-I or axis-II disorders besides AS. Also these persons displayed insomnia. It can be noted that the distribution of psychiatric diagnoses in AS subjects was virtually similar to that found among patient with chronic insomnia. Conclusions the neuropsychiatric deficits inherent of AS predispose both to insomnia and to anxiety and mood disorders. Therefore a careful assessment of sleep quality should be an

  11. Risk factors, health risks, and risk management for aircraft personnel and frequent flyers.

    Science.gov (United States)

    Kim, Jeoum Nam; Lee, Byung Mu

    2007-01-01

    Health risks associated with long periods of time in flight are of concern to astronauts, crew members, and passengers. Many epidemiological studies showed that occupational and frequent flyers may be susceptible to ocular, cardiovascular, neurological, pulmonary, gastrointestinal, sensory, immunological, physiological, and even developmental disorders. In addition, the incidences of cancer and food poisoning are expected to be higher in such individuals. This article reviews health risks and risk factors associated with air travel, and discusses risk management strategies. To reduce adverse health risks, risk factors such as radiation, infection, stress, temperature, pressure, and circadian rhythm need to be avoided or reduced to levels that are as low as technologically achievable to protect flight personnel and passengers.

  12. Efficient Realization of Frequently Used Bijections on Cube—Connected Cycles

    Institute of Scientific and Technical Information of China (English)

    刘志勇; 刘群; 等

    1995-01-01

    CCC has lower hardware complexity than hypercube and is suited for current VLSI technology.LC-permutations are a large set of important permutations frequently used in various parallel computations.Existing routing algorithms for CCC cannot realize LC-permutations without network conflict.We present an algorithm to realize LC-permutations on CCC.The algorithm consists of two periods of inter-cycle transmissions and one period of inner-cycle transmissions.In the inter-cycle transmissions the dimensional links of CCC are used in a “pipeline” manner and in the inner-cycle transmissions the data packets are sorted by a part of its destination address.The algorithm is fast (O(log2N)) and no conflict will occur.

  13. Supporting Frequent Updates in R-Trees: A Bottom-Up Approach

    DEFF Research Database (Denmark)

    Lee, Mong Li; Hsu, Wynne; Jensen, Christian Søndergaard

    2004-01-01

    locality. While the R-tree is the index of choice for multi-dimensional data with low dimensionality, and is thus relevant to these applications, R-tree updates are also relatively inefficient. We present a bottom-up update strategy for R-trees that generalizes existing update techniques and aims......Advances in hardware-related technologies promise to enable new data management applications that monitor continuous processes. In these applications, enormous amounts of state samples are obtained via sensors and are streamed to a database. Further, updates are very frequent and may exhibit....... Empirical studies indicate that the bottom-up strategy outperforms the traditional top-down technique, leads to indices with better query performance, achieves higher throughput, and is scalable....

  14. Alternative protein-protein interfaces are frequent exceptions.

    Directory of Open Access Journals (Sweden)

    Tobias Hamp

    Full Text Available The intricate molecular details of protein-protein interactions (PPIs are crucial for function. Therefore, measuring the same interacting protein pair again, we expect the same result. This work measured the similarity in the molecular details of interaction for the same and for homologous protein pairs between different experiments. All scores analyzed suggested that different experiments often find exceptions in the interfaces of similar PPIs: up to 22% of all comparisons revealed some differences even for sequence-identical pairs of proteins. The corresponding number for pairs of close homologs reached 68%. Conversely, the interfaces differed entirely for 12-29% of all comparisons. All these estimates were calculated after redundancy reduction. The magnitude of interface differences ranged from subtle to the extreme, as illustrated by a few examples. An extreme case was a change of the interacting domains between two observations of the same biological interaction. One reason for different interfaces was the number of copies of an interaction in the same complex: the probability of observing alternative binding modes increases with the number of copies. Even after removing the special cases with alternative hetero-interfaces to the same homomer, a substantial variability remained. Our results strongly support the surprising notion that there are many alternative solutions to make the intricate molecular details of PPIs crucial for function.

  15. New Approach on Sunflower Seeds Processing: Kernel with Several Technological Applications, Husks Package, Different Fat Content Tahini and Halva Properties

    Directory of Open Access Journals (Sweden)

    Vlad Mureşan

    2015-11-01

    Full Text Available Sunflower is the basic oil-crop in Central and Eastern Europe. As sunflower seeds are mainly used for oil production, the most of the kernels available on the market show high oil content (>55%. Consequently, when sunflower kernel paste (tahini is used in different food products, oil exudation occurs.The aim of current work was to use entirely the sunflower seeds by partially defatting and obtaining different fat content sunflower pastes with multiple food applications, while using the husks for developing an ecological package. Sunflower kernels were industrially roasted in a continuous roasting drum.  Raw and roasted kernels were pressed at pilot plant scale by using a laboratory expeller. Partially defatted sunflower paste was obtained from the press cakes by employing a ball mill. Different fat content tahini samples were obtained by adding the required amount of oil to the partially defatted paste. Tahini samples fat content ranged from 45 to 60%. Tahini and halva were chosen as a study model. Decreasing tahini oil content increased its colloidal stability during storage, a similar trend being noticed when halva samples were stored. Moreover, halva texture analysis and sensory characteristics were assessed for selecting the optimum tahini oil content and thermal treatment. Various sunflower kernel food applications were proposed by obtaining the related prototypes at pilot plant scale: roasted sunflower kernel biscuits, sunflower spreadable cream filled biscuits, hummus, sunflower paste coated in chocolate, sunflower kernel chikki and bars, as well as an innovative ecological package based on the resulting sunflower husks and a starch adhesive. 

  16. Application of oil-water discrimination technology in fractured reservoirs using the differences between fast and slow shear-waves

    Science.gov (United States)

    Luo, Cong; Li, Xiangyang; Huang, Guangtan

    2017-08-01

    Oil-water discrimination is of great significance in the design and adjustment of development projects in oil fields. For fractured reservoirs, based on anisotropic S-wave splitting information, it becomes possible to effectively solve such problems which are difficult to deal with in traditional longitudinal wave exploration, due to the similar bulk modulus and density of these two fluids. In this paper, by analyzing the anisotropic character of the Chapman model (2009 Geophysics 74 97-103), the velocity and reflection coefficient differences between the fast and slow S-wave caused by fluid substitution have been verified. Then, through a wave field response analysis of the theoretical model, we found that water saturation causes a longer time delay, a larger time delay gradient and a lower amplitude difference between the fast and slow S-wave, while the oil case corresponds to a lower time delay, a lower gradient and a higher amplitude difference. Therefore, a new class attribute has been proposed regarding the amplitude energy of the fast and slow shear wave, used for oil-water distinction. This new attribute, as well as that of the time delay gradient, were both applied to the 3D3C seismic data of carbonate fractured reservoirs in the Luojia area of the Shengli oil field in China. The results show that the predictions of the energy attributes are more consistent with the well information than the time delay gradient attribute, hence demonstrating the great advantages and potential of this new attribute in oil-water recognition.

  17. Physical and chemical treatment of end of life panels: An integrated automatic approach viable for different photovoltaic technologies.

    Science.gov (United States)

    Pagnanelli, Francesca; Moscardini, Emanuela; Granata, Giuseppe; Abo Atia, Thomas; Altimari, Pietro; Havlik, Tomas; Toro, Luigi

    2017-01-01

    Different kinds of panels (Si-based panels and CdTe panels) were treated according to a common process route made up of two main steps: a physical treatment (triple crushing and thermal treatment) and a chemical treatment. After triple crushing three fractions were obtained: an intermediate fraction (0.4-1mm) of directly recoverable glass (17%w/w); a coarse fraction (>1mm) requiring further thermal treatment in order to separate EVA-glued layers in glass fragments; a fine fraction (panels and Cd-Te panels with an overall recycling rate of 91%.

  18. 多种原料燃料乙醇生产技术%The Technology of Fuel Ethanol Produced From Different Raw Materials

    Institute of Scientific and Technical Information of China (English)

    高文中; 汪成美; 闫莉; 马传路; 赵淑杰; 吕惠生

    2014-01-01

    Fuel ethanolis the most successful alternative liquid transportation fuel by far. It will take prominently part in the renewable fuel market. In this paper, the mainstream production technologies and the technical conditions of fuel ethanol produced from different raw materials such as corn, sugar cane, cassava and cellulosic materials were reviewed. Each technological important indexes such as steam consumption were put forward and discussed. What's more, Suggestions of technology and industry development were put forward.%燃料乙醇是迄今为止最为成功的液体替代运输燃料,其在可再生燃料市场中将占重要地位。综述了玉米,甘蔗,木薯,纤维素等不同原料燃料乙醇目前主流的生产工艺,以及我国在相关技术领域的技术状况及产业化水平,并给出了各工艺代表性装置蒸汽消耗等标志生产水平的重要指标,进行了讨论比较,提出了多种原料燃料乙醇技术及产业发展建议。

  19. Life Cycle Impact Assessment (LCIA of Potable Water Production in Malaysia: A Comparison among Different Technology Used in Water Treatment Plant

    Directory of Open Access Journals (Sweden)

    Amir Hamzah Sharaai

    2010-01-01

    Full Text Available LCA is a systematic procedure which assesses the lifecycle of a product to analyze the extent of its environmental impact contribution. In this LCA study comparison between three different water treatment plants in Malaysia have been conducted. Conventional Plant (using Dissolved Air Floatation (DAF and Pulsatube ® Clarifier Technology must undergo treatment process uses a standard system of screening, coagulation and flocculation, sedimentation, filtration and disinfection processes. While nonconventional plant using Ultrafiltration (UF not does go through processes like conventional plant. In reviewing the water treatment process by using LCA procedures, detailed information of every process involved is needed, including acquiring the energy information and materials consumed during the entire treatment process. The LCA procedure applied in this research uses the ISO 14040 series. Data inventory from selected month will be analyzed to gauge the impact to the environment using Eco-indicator 99 method. The high consumption of electricity in UF and DAF technologies is the contributing factors to the depletion of natural resources. Even though the electricity consumption in pulsatube ® clarifier technology is seen as efficient, but its PAC chemical usage is seen as the major contributor to the reduction of environmental quality and human health.

  20. [Contraceptive compliance - why is contraceptive failure still so frequent?].

    Science.gov (United States)

    Bitzer, Johannes

    2009-02-01

    Contraceptive compliance is defined as the correct use (according to the method specific prescriptions given by a medical professional and/or in written form as patient information leaflet) of a contraceptive method. Non-compliance describes a mismatch between the real behaviour of a user and the correct or ideal behaviour. There are various indicators that in general contraceptive compliance is far from ideal. Many studies report a rate of unintended pregnancies of 50%, half of them terminating in abortion. The abortion rate remains high even in countries with availability of advanced contraceptive technology. Especially with hormonal contraception and barrier methods the gap between correct and real use is large. Discontinuation rates per year reach up to 50%. Reasons for Non Compliance are (a) Lack of motivation to prevent a pregnancy due to ambivalence regarding the wish for a child as well as sexual and relationship issues (b) Cognitive factors (False information, misconceptions, irrational fears) (c) Difficult or lacking access to contraceptive methods (d) Behavioral errors and mistakes (Forgetting, loosing etc.) and (e) Side effects of the methods used. Three strategies to improve compliance can be distinguished: (a) Improving counselling; (b) Developing contraceptive methods which demand a low level of compliant behaviour by the user; (c) Improving quality of life of users by minimizing the negative side effects and maximizing the non contraceptive health benefits.

  1. Choice with frequently changing food rates and food ratios.

    Science.gov (United States)

    Baum, William M; Davison, Michael

    2014-03-01

    In studies of operant choice, when one schedule of a concurrent pair is varied while the other is held constant, the constancy of the constant schedule may exert discriminative control over performance. In our earlier experiments, schedules varied reciprocally across components within sessions, so that while food ratio varied food rate remained constant. In the present experiment, we held one variable-interval (VI) schedule constant while varying the concurrent VI schedule within sessions. We studied five conditions, each with a different constant left VI schedule. On the right key, seven different VI schedules were presented in seven different unsignaled components. We analyzed performances at several different time scales. At the longest time scale, across conditions, behavior ratios varied with food ratios as would be expected from the generalized matching law. At shorter time scales, effects due to holding the left VI constant became more and more apparent, the shorter the time scale. In choice relations across components, preference for the left key leveled off as the right key became leaner. Interfood choice approximated strict matching for the varied right key, whereas interfood choice hardly varied at all for the constant left key. At the shortest time scale, visit patterns differed for the left and right keys. Much evidence indicated the development of a fix-and-sample pattern. In sum, the procedural difference made a large difference to performance, except for choice at the longest time scale and the fix-and-sample pattern at the shortest time scale. © Society for the Experimental Analysis of Behavior.

  2. JPRS Report, Science & Technology, Japan

    Science.gov (United States)

    2007-11-02

    This is Japan Report with Science and Technology. It contains the issues with different topics on biotecnology , defense industry, nuclear engineering, Marine technology, science and technology policy.

  3. Evaluating the Force Concept Inventory for different student groups at the Norwegian University of Science and Technology

    CERN Document Server

    Persson, J R

    2015-01-01

    The Force Concept Inventory (FCI) was developed by Hestenes, Wells and Swackhamer, in order to assess student understanding of the concept of force. FCI has been used for over 20 years and in different countries. When applying the inventory in a new context it is important to evaluate the reliability and discrimination power of this assessment tool. In this study the reliability and discrimination power are evaluated in the context of Engineering education at a Norwegian university, using statistical tests, focusing on both item analysis and on the entire test. The results indicate that FCI is a reliable and discriminating tool in most cases. As there are exceptions, statistical tests should always be done when FCI is administered in a new context.

  4. Clinically applicable optical imaging technology for body size and shape analysis: comparison of systems differing in design.

    Science.gov (United States)

    Bourgeois, B; Ng, B K; Latimer, D; Stannard, C R; Romeo, L; Li, X; Shepherd, J A; Heymsfield, S B

    2017-09-06

    Recent advances have extended anthropometry beyond flexible tape measurements to automated three-dimensional optical devices that rapidly acquire hundreds of body surface dimensions. Three new devices were recently introduced that share in common inexpensive optical cameras. The design, and thus potential clinical applicability, of these systems differ substantially leading us to critically evaluate their accuracy and precision. 113 adult subjects completed evaluations by the three optical devices (KX-16 (16 stationary cameras), Proscanner (1 vertically oscillating camera), and Styku scanner (1 stationary camera)), air displacement plethysmography (ADP), dual-energy X-ray absorptiometry (DXA) and a flexible tape measure. Optical measurements were compared to reference method estimates that included results acquired by flexible tape, DXA and ADP. Optical devices provided respective circumference and regional volume estimates that overall were well-correlated with those obtained from flexible tape measurements (for example, hip circumference: R(2), 0.91, 0.90, 0.96 for the KX-16, Proscanner, and Styku scanner, respectively) and DXA (for example, trunk volume: R(2), 0.97, 0.97, and 0.98). Total body volumes measured by the optical devices were highly correlated with those from the ADP system (all R(2)s, 0.99). Coefficient of variations obtained from duplicate measurements (n, 55) were larger in optical than in reference measurements and significant (Pmethod estimates. Overall, the evaluated optical imaging systems differing in design provided body surface measurements that compared favorably with corresponding reference methods. However, our evaluations uncovered system measurement limitations, such as discrepancies in landmarking, that with correction have the potential to improve future developed devices.European Journal of Clinical Nutrition advance online publication, 6 September 2017; doi:10.1038/ejcn.2017.142.

  5. Twelve Frequently Asked Questions about Growth Curve Modeling

    Science.gov (United States)

    Curran, Patrick J.; Obeidat, Khawla; Losardo, Diane

    2010-01-01

    Longitudinal data analysis has long played a significant role in empirical research within the developmental sciences. The past decade has given rise to a host of new and exciting analytic methods for studying between-person differences in within-person change. These methods are broadly organized under the term "growth curve models." The…

  6. Does the Number of Pharmacies a Patient Frequents Affect Adherence to Statins?

    Science.gov (United States)

    Christie, Russell; Sketris, Ingrid; Andreou, Pantalis; Holbrook, Anne; Levy, Adrian; Tamim, Hala

    2017-05-06

    We hypothesized that medication adherence is affected by the number of pharmacies a patient frequents. The objective was to estimate the strength of association between the number of pharmacies a patient frequents and adherence to statins. Using administrative data from the Nova Scotia Seniors' Pharmacare program, a retrospective cohort study was conducted among subjects aged 65 years and older first dispensed statin between 1998 and 2008. The Usual Provider of Care (UPC), was defined as the number of dispensation days from the most frequented pharmacy divided by the total number of dispensation days. Estimated adherence of over 80% of the Medication Possession Ratio was defined as adherent. Data were analyzed using hierarchical linear regression. The cohort of 25,641 subjects was 59% female with a mean age of 74 years. During follow-up, subjects filled prescriptions in a median of 2 (mean = 2; standard deviation = 0.88) pharmacies and visited pharmacies a median of 28 (mean = 30) times. During that time, 61% of patients used one pharmacy exclusively. Among subjects using 1 pharmacy, 59% were adherent while 58% using more than one pharmacy were adherent. However, upon adjustment for differences in distributions of age, sex, and other confounders, subjects who used more than one pharmacy had 10% decreased odds of statin adherence (odds ratio: 0.90, 95% confidence interval: 0.86-0.96). These results were robust in sensitivity analyses. Among seniors newly starting statin therapy, using a single community pharmacy was modestly associated with adherence.

  7. Rapid proportion comparison with spatial arrays of frequently used meaningful visual symbols.

    Science.gov (United States)

    Sakuma, Naoto; Kimura, Eiji; Goryo, Ken

    2017-11-01

    It has been shown that when two arrays of Arabic numerals were briefly presented, observers could accurately indicate which array contained the larger number of a target numeral. This study investigated whether this rapid proportion comparison can be extended to other meaningful symbols that share some of notable properties of Arabic numerals. We tested mainly several Japanese Kanji letters, each of which represents a meaning and can work as a word. Using physically identical stimulus sets that could be interpreted as different types of letters, Experiment 1 first confirmed the rapid proportion comparison with Arabic numerals for Japanese participants. Experiment 2 showed that the rapid proportion comparison can be extended to Kanji numerals. Experiment 3 successfully demonstrated that rapid proportion judgments can be found with non-quantitative Kanji letters that are used frequently. Experiment 4 further demonstrated the rapid proportion comparison with frequently used meaningful non-letter symbols (gender icons). The rapid processing cannot be attributed to fluent processing of familiar items, because it was not found with familiar phonograms (Japanese Kana letters). These findings suggest that the rapid proportion comparison can be commonly found with frequently used meaningful symbols, even though their meaning is not relevant to the task.

  8. Absence of frequent herpesvirus transmission in a nonhuman primate predator-prey system in the wild.

    Science.gov (United States)

    Murthy, Sripriya; Couacy-Hymann, Emmanuel; Metzger, Sonja; Nowak, Kathrin; De Nys, Helene; Boesch, Christophe; Wittig, Roman; Jarvis, Michael A; Leendertz, Fabian H; Ehlers, Bernhard

    2013-10-01

    Emergence of viruses into the human population by transmission from nonhuman primates (NHPs) represents a serious potential threat to human health that is primarily associated with the increased bushmeat trade. Transmission of RNA viruses across primate species appears to be relatively frequent. In contrast, DNA viruses appear to be largely host specific, suggesting low transmission potential. Herein, we use a primate predator-prey system to study the risk of herpesvirus transmission between different primate species in the wild. The system was comprised of western chimpanzees (Pan troglodytes verus) and their primary (western red colobus, Piliocolobus badius badius) and secondary (black-and-white colobus, Colobus polykomos) prey monkey species. NHP species were frequently observed to be coinfected with multiple beta- and gammaherpesviruses (including new cytomegalo- and rhadinoviruses). However, despite frequent exposure of chimpanzees to blood, organs, and bones of their herpesvirus-infected monkey prey, there was no evidence for cross-species herpesvirus transmission. These findings suggest that interspecies transmission of NHP beta- and gammaherpesviruses is, at most, a rare event in the wild.

  9. Finding Frequent Pattern with Transaction and Occurrences based on Density Minimum Support Distribution

    Directory of Open Access Journals (Sweden)

    Preeti Khare

    2012-09-01

    Full Text Available The importance of data mining is increasing exponentially since last decade and in recent time where there is very tough competition in the market where the quality of information and information on time play a very crucial role in decision making of policy has attracted a great deal of attention in the information industry and in society as a whole. In this approach we also use density minimum support so that we reduce the execution time. A frequent superset means it contains more transactions then the minimum support. It utilize the concept that if the item set is not frequent but the superset may be frequent which is consider for the further data mining task. By this approach we can store the transaction on the daily basis, then we provide three different density zone based on the transaction and minimum support which is low (L, Medium (M, High (H. Based on this approach we categorize the item set for pruning. Our approach is based on apriori algorithm but provides better reduction in time because of the prior separation in the data, which is useful for selecting according to the density wise distribution in India. Our algorithm provides the flexibility for improved association and dynamic support. Comparative result shows the effectiveness of our algorithm.

  10. Evaluation of the dark signal performance of different SiPM-technologies under irradiation with cold neutrons

    Science.gov (United States)

    Durini, Daniel; Degenhardt, Carsten; Rongen, Heinz; Feoktystov, Artem; Schlösser, Mario; Palomino-Razo, Alejandro; Frielinghaus, Henrich; van Waasen, Stefan

    2016-11-01

    In this paper we report the results of the assessment of changes in the dark signal delivered by three silicon photomultiplier (SiPM) detector arrays, fabricated by three different manufacturers, when irradiated with cold neutrons (wavelength λn=5 Å or neutron energy of En=3.27 meV) up to a neutron dose of 6×1012 n/cm2. The dark signals as well as the breakdown voltages (Vbr) of the SiPM detectors were monitored during the irradiation. The system was characterized at room temperature. The analog SiPM detectors, with and without a 1 mm thick Cerium doped 6Li-glass scintillator material located in front of them, were operated using a bias voltage recommended by the respective manufacturer for a proper detector performance. Iout-Vbias measurements, used to determine the breakdown voltage of the devices, were repeated every 30 s during the first hour and every 300 s during the rest of the irradiation time. The digital SiPM detectors were held at the advised bias voltage between the respective breakdown voltage and dark count mappings repeated every 4 min. The measurements were performed on the KWS-1 instrument of the Heinz Maier-Leibnitz Zentrum (MLZ) in Garching, Germany. The two analog and one digital SiPM detector modules under investigation were respectively fabricated by SensL (Ireland), Hamamatsu Photonics (Japan), and Philips Digital Photon Counting (Germany).

  11. [Utilization of antibiotics according to most frequent indications at Hungarian hospitals and results of surveys].

    Science.gov (United States)

    Ternák, G; Almási, I

    1997-05-25

    Antibiotic utilisation of 8 Hungarian hospitals was analyzed examining the case histories of patients who were discharged between January 1 and 31, 1995. Usage of antibiotics in the most frequent indications is reported in this paper. Majority of the prescriptions for the treatment of upper and lower respiratory tract infections were broad spectrum beta lactams. Higher rate of penicillin usage was found only in tonsillitis cases. Besides II. generation cephalosporins (22.7% of 730 prescriptions), beta-lactamase inhibitor + aminopenicillin combinations (13.4%) and III. generation cephalosporins (9.5%) considerable quantity of aminoglycosides (14.9%) and quinolones (9.5%) were found in pneumonia. Relatively high rate of aminoglycosides in the treatment of lower respiratory infections is inconsistent with therapeutic guidelines in force. Co-trimoxazol and quinolones were most frequently prescribed for the treatment of lower urinary tract infections. Traditional urodesinficients were on the first place only at one hospital. Treatment of frequently occurring nosocomial infections was compared with those of community acquired at the same site. There was not significant difference in the utilisation rates of the most of antibiotic groups regarding place of disease acquisition. 44% of the 1373 prescriptions for perioperative profilaxis was indicated for clean operations where benefit of antibiotic administration is questionable. Duration of antibiotic profilaxis was more than 48 hours in 59% of prescriptions. Drugs most frequently used for perioperative profilaxis were II. generation cephalosporins (23.7%), metronidazol (16.7%), aminoglycosides (9.6%) and III. generation cephalosporines (9.6%). The authors compare their results to the literature. They suggest the setting up of "infection control committees" to organise the antibiotic policies in hospitals.

  12. Frequent consumption of certain fast foods may be associated with an enhanced preference for salt taste.

    Science.gov (United States)

    Kim, G H; Lee, H M

    2009-10-01

    Excessive exposure to high-salt foods may change the taste perception, which results in the overconsumption of sodium. The present study aimed to investigate the effects of liking or frequent eating of high-salt food on salt taste perception among schoolchildren. The detection threshold of sodium chloride (NaCl) and the preferred salinity of beansprout soup were determined and were used to represent the salt taste acuity and preference, respectively, of 70 Koreans aged 12-13 years. A self-administered questionnaire was used to obtain information regarding food preferences or frequency of eating certain high-salt Korean dishes, Westernised fast foods and commercially-prepared foods, as well as various food groups. The significance of differences in taste perceptions was assessed in relation to the reported liking, and frequency of eating, high-salt foods. In addition, the correlation between taste perception and the liking or frequency of eating fast foods was also assessed. The participants who reported a liking for soup/stew had significantly higher thresholds for NaCl (P = 0.029), and frequent users of fast-food restaurants showed a preference for significantly saltier soup (P = 0.010). The preferred salinity was associated significantly with a high preference for pizza (r = 0.282, P = 0.018) or hamburgers (r = 0.305, P = 0.010) and the frequent consumption of pork cutlets (r = 0.239, P = 0.046) or hamburgers (r = 0.461, P = 0.010). The results obtained in the present study suggest that the frequent consumption of certain fast foods by young teenagers may be associated with an increased preference for salt taste. This study provides basic information for use in devising education programmes in evidence-based nutrition to reduce salt intake.

  13. Do different clinical evidence bases lead to discordant health-technology assessment decisions? An in-depth case series across three jurisdictions

    Directory of Open Access Journals (Sweden)

    Spinner DS

    2013-01-01

    Full Text Available Daryl S Spinner,1 Julie Birt,2 Jeffrey W Walter,1 Lee Bowman,2 Josephine Mauskopf,1 Michael F Drummond,3 Catherine Copley-Merriman11RTI Health Solutions, Research Triangle Park, NC, USA; 2Eli Lilly and Company, Indianapolis, IN, United States; 3University of York, York, UKBackground: Health-technology assessment (HTA plays an important role in informing drug-reimbursement decision-making in many countries. HTA processes for the Pharmaceutical Benefits Advisory Committee (PBAC in Australia, the Common Drug Review (CDR in Canada, and the National Institute for Health and Clinical Excellence (NICE in England and Wales are among the most established in the world. In this study, we performed nine in-depth case studies to assess whether different clinical evidence bases may have influenced listing recommendations made by PBAC, CDR, and NICE.Methods: Nine drugs were selected for which the three agencies had provided listing recommendations for the same indication between 2007 and 2010. We reviewed the evidence considered for each listing recommendation, identified the similarities and differences among the clinical evidence bases considered, and evaluated the extent to which different clinical evidence bases could have contributed to different decisions based on HTA body comments and public assessment of the evidence.Results: HTA agencies reached the same recommendation for reimbursement (recommended for listing for four drugs and different recommendations for five drugs. In all cases, each agency used different evidence bases in their recommendations. The agencies considered overlapping sets of clinical comparators and trials when evaluating the same drug. While PBAC and NICE considered indirect and/or mixed-treatment comparisons, CDR did not. In some cases, CDR and/or NICE excluded trials from review if the drug and/or the comparator were not administered according to the relevant marketing authorization.Conclusions: In the listing recommendations

  14. 41 CFR 301-53.3 - How may I use promotional materials and frequent traveler benefits?

    Science.gov (United States)

    2010-07-01

    ... promotional materials and frequent traveler benefits? 301-53.3 Section 301-53.3 Public Contracts and Property... TRAVELER PROGRAMS § 301-53.3 How may I use promotional materials and frequent traveler benefits? Promotional materials and frequent traveler benefits may be used as follows: (a) You may use frequent traveler...

  15. Characterization of polyphenols, sugars, and other polar compounds in persimmon juices produced under different technologies and their assessment in terms of compositional variations.

    Science.gov (United States)

    Jiménez-Sánchez, Cecilia; Lozano-Sánchez, Jesús; Marti, Nuria; Saura, Domingo; Valero, Manuel; Segura-Carretero, Antonio; Fernández-Gutiérrez, Alberto

    2015-09-01

    Persimmon juice is emerging in the global juice market as a new wholesome commercial juice that could effectively complement a healthy diet, given the epidemiological evidence linking a diet rich in fruits and vegetables with reduced incidences of chronic diseases. However, little data are available on the persimmon-juice composition or on the effect of the technological treatment employed for its production. The present work performs a complete qualitative analytical characterization through high-performance liquid chromatography coupled to electrospray time-of-flight mass spectrometry (HPLC-DAD-ESI-TOF/MS) of the diverse persimmon juices produced under different technologies in a pilot plant (clarification, astringency removal, flash vacuum expansion, centrifugation and pasteurization) in order to evaluate the effect of the different production procedures on the polar chemical profile of persimmon juice. Persimmon-juice extracts have been found to be a source of sugars, protein derivatives, organic acids, vitamins, and polyphenols, including simple polyphenols (phenolic acids and flavonoids) and polymerized flavan-3-ols. A marked influence of processing on the composition of the juices has been noticed. Extracts 3 and 7 (undergoing the combinations of clarification and centrifugation, and astringency removal, centrifugation and pasteurization, respectively) contained more polyphenols, which may help reduce risk of chronic diseases.

  16. A unified view of Automata-based algorithms for Frequent Episode Discovery

    CERN Document Server

    Achar, Avinash; Sastry, P S

    2010-01-01

    Frequent Episode Discovery framework is a popular framework in Temporal Data Mining with many applications. Over the years many different notions of frequencies of episodes have been proposed along with different algorithms for episode discovery. In this paper we present a unified view of all such frequency counting algorithms. We present a generic algorithm such that all current algorithms are special cases of it. This unified view allows one to gain insights into different frequencies and we present quantitative relationships among different frequencies. Our unified view also helps in obtaining correctness proofs for various algorithms as we show here. We also point out how this unified view helps us to consider generalization of the algorithm so that they can discover episodes with general partial orders.

  17. LOX Gene Transcript Accumulation in Olive (Olea europaea L. Fruits at Different Stages of Maturation: Relationship between Volatile Compounds, Environmental Factors, and Technological Treatments for Oil Extraction

    Directory of Open Access Journals (Sweden)

    Innocenzo Muzzalupo

    2012-01-01

    Full Text Available The quality of olive oil is influenced by genetic and environmental factors and by the maturation state of drupes, but it is equally affected by technological treatments of the process. This work investigates the possible correlation between olive LOX gene transcript accumulation, evaluated in fruits collected at different stages of maturation, and chemical biomarkers of its activity. During olive fruit ripening, the same genotype harvested from two different farms shows a positive linear trend between LOX relative transcript accumulation and the content of volatile compounds present in the olive oil aroma. Interestingly, a negative linear trend was observed between LOX relative transcript accumulation and the content of volatile compounds present in the olive pastes obtained from olive fruits with and without malaxation. The changes in the olive LOX transcript accumulation reveal its environmental regulation and suggest differential physiological functions for the LOXs.

  18. LOX Gene transcript accumulation in olive (Olea europaea L.) fruits at different stages of maturation: relationship between volatile compounds, environmental factors, and technological treatments for oil extraction.

    Science.gov (United States)

    Muzzalupo, Innocenzo; Macchione, Barbara; Bucci, Cristina; Stefanizzi, Francesca; Perri, Enzo; Chiappetta, Adriana; Tagarelli, Antonio; Sindona, Giovanni

    2012-01-01

    The quality of olive oil is influenced by genetic and environmental factors and by the maturation state of drupes, but it is equally affected by technological treatments of the process. This work investigates the possible correlation between olive LOX gene transcript accumulation, evaluated in fruits collected at different stages of maturation, and chemical biomarkers of its activity. During olive fruit ripening, the same genotype harvested from two different farms shows a positive linear trend between LOX relative transcript accumulation and the content of volatile compounds present in the olive oil aroma. Interestingly, a negative linear trend was observed between LOX relative transcript accumulation and the content of volatile compounds present in the olive pastes obtained from olive fruits with and without malaxation. The changes in the olive LOX transcript accumulation reveal its environmental regulation and suggest differential physiological functions for the LOXs.

  19. Demand on Temporary Parallel Route Recovery for Frequent Link Failure in VANET

    Science.gov (United States)

    Sakthi Ganesh, M.; Venkata krishna, P.

    2015-03-01

    Vehicular Ad-hoc Network (VANET) is an upcoming technology for communication between vehicles during the trip, which provides Internet connectivity resulting in safer roads giving access important alerts and comfort during the slip. VANET technology integrates wireless cellular and ad hoc for seamless connectivity between vehicles. VANETs are organizations that allow vehicles to communicate with each other. Wireless-vice can send data to nearby vehicles, and messages can be transported from one vehicle to another, so that the information can be broadcast throughout the metropolis. In the network, link failure is very common due to the high mobility of clients. Frequent link failure occurs as packets do not arrive at the respective goals. The mechanism proposed here establishes a form of route discovery packet parallel to the real time application to be extradited to the destination, while minimizing losses. The primary aim is to establish parallel paths during link failure scenarios for real-time applications to provide information to their destination safely. During link failures, the recovery road is parallel to the fixed temporary parallel path between the nodes. The node before the link failure packet buffers, after setting the new parallel paths before the packets stored in the buffer via the destination newly created path.

  20. Frequent use of staff canteens is associated with unhealthy dietary habits and obesity in a Norwegian adult population.

    Science.gov (United States)

    Kjøllesdal, Marte Råberg; Holmboe-Ottesen, Gerd; Wandel, Margareta

    2011-01-01

    To explore socio-economic differences in use of staff canteens and whether frequent use of staff canteens is associated with different food patterns and obesity. Cross-sectional study using three self-administered questionnaires, two of them including food frequency questions. Factor analysis was used to explore food patterns. Oslo, Norway, 2000-2001. In total 8943 adult, working Oslo citizens. Frequent (≥3 times/week) use of staff canteens was most likely among men, younger workers and those in the highest education and income groups. However, after adjustment for demographic, socio-economic and lifestyle factors, those with highest education were least likely to use staff canteens frequently. Frequent eating in staff canteens was positively associated with a Western food pattern (based on fat-rich food, fast food and red meat) and inversely associated with a traditional food pattern (based on boiled potatoes and gravy, and less rice, pasta and oil) in multivariate analyses. Unadjusted, frequent eating in staff canteens was also inversely associated with a prudent food pattern (based on fruit, vegetables, fish, legumes and oil). The likelihood of being obese (BMI ≥ 30 kg/m2) increased significantly with frequent eating in staff canteens, also when adjusted for demographic and socio-economic variables. Adjustment for the food patterns attenuated this relationship, but it was still significant. Frequent eating in staff canteens was negatively related to socio-economic position and positively associated with unhealthy dietary habits. This partly explained higher odds for obesity among frequent users of staff canteens. Future research should assess the availability and food options of staff canteens.

  1. DMBT1 is frequently downregulated in well-differentiated gastric carcinoma but more frequently upregulated across various gastric cancer types

    DEFF Research Database (Denmark)

    Conde, Ana R; Martins, Ana P; Brito, Miguel

    2007-01-01

    Well-differentiated gastric carcinomas are considered to represent a distinct entity emerging via specific molecular changes different from those found in other gastric carcinoma types. The gene deleted in malignant brain tumours 1 (DMBT1) at 10q25.3-q26.1 codes for a protein presumably involved ...

  2. DMBT1 is frequently downregulated in well-differentiated gastric carcinoma but more frequently upregulated across various gastric cancer types

    DEFF Research Database (Denmark)

    Conde, Ana R; Martins, Ana P; Brito, Miguel

    2007-01-01

    Well-differentiated gastric carcinomas are considered to represent a distinct entity emerging via specific molecular changes different from those found in other gastric carcinoma types. The gene deleted in malignant brain tumours 1 (DMBT1) at 10q25.3-q26.1 codes for a protein presumably involved ...

  3. A Frequent Pattern Mining Algorithm for Feature Extraction of Customer Reviews

    Directory of Open Access Journals (Sweden)

    Seyed Hamid Ghorashi

    2012-07-01

    Full Text Available Online shoppers often have different idea about the same product. They look for the product features that are consistent with their goal. Sometimes a feature might be interesting for one, while it does not make that impression for someone else. Unfortunately, identifying the target product with particular features is a tough task which is not achievable with existing functionality provided by common websites. In this paper, we present a frequent pattern mining algorithm to mine a bunch of reviews and extract product features. Our experimental results indicate that the algorithm outperforms the old pattern mining techniques used by previous researchers.

  4. Students frequently ask: ‘Yes but...What is the utility of physics?’

    OpenAIRE

    2015-01-01

    Two Teaching Innovation Projects were carried out in the framework of the subjects ‘Physics I’ and ‘Physics II’ for different Degrees on Engineering at the Engineering High School of the University of Cadiz, Spain, during the 2013-2014 course. The aim of these Projects was to catch the interest of first course students on physical phenomena and principles, a matter frequently considered as ‘difficult’ or even ‘boring’ for them when it is approached from an excessively formal scope. The method...

  5. [Myofascial pain syndrome--frequent occurrence and often misdiagnosed].

    Science.gov (United States)

    Pongratz, D E; Späth, M

    1998-09-30

    Myofascial pain syndrome (MPS) is a very common localized--sometimes also polytopic--painful musculoskeletal condition associated with trigger points, for which, however, diagnostic criteria established in well-designed studies are still lacking. These two facts form the basis for differentiating between MPS and the fibromyalgia syndrome. The difference between trigger points (MPS) and tender points (fibromyalgia) is of central importance--not merely in a linguistic sense. A knowledge of the signs and symptoms typically associated with a trigger point often obviates the need for time-consuming and expensive technical diagnostic measures. The assumption that many cases of unspecific complaints affecting the musculoskeletal system may be ascribed to MPS makes clear the scope for the saving of costs.

  6. [IUD insertion during cesarean section and its most frequent complications].

    Science.gov (United States)

    Alvarez Pelayo, J; Borbolla Sala, M E

    1994-11-01

    A prospective and cooperative study was done in 152 patients that were submitted to cesarean section. Seventy eight patients received intrauterine device (IUD) T CU 220 during cesarean section, and the other 74 patients only got the cesarean section without IUD. The events that were analyzed during the puerperium were pain, bleeding and infection. We didn't find any difference in the results between both groups, these were analyzed with the help of the square chi (X2). These results suggest that with an adequate selection of the patients, the insertion of the IUD during the cesarean section is a secure and helpful method for the fertility control for patients with high risk of reproduction.

  7. Staff turnover: occasional friend, frequent foe, and continuing frustration.

    Science.gov (United States)

    McConnell, C R

    1999-09-01

    Turnover appears to be a relatively simple concept. However, considerable confusion results when discussing turnover because of differences in how it is defined--what is counted, how it is counted, and how the rate of turnover is expressed. Turnover is also costly, although not enough attention is paid to turnover's cost because so much of it is indirect and thus not readily visible. There are a variety of causes of turnover, some which can be corrected and some which cannot be avoided. Reducing or otherwise controlling turnover requires continuing management attention to its causes and constant recognition of what can and should be controlled and what cannot be controlled. Ongoing attention to turnover is an essential part of the department manager's role.

  8. Why eat at fast-food restaurants: reported reasons among frequent consumers.

    Science.gov (United States)

    Rydell, Sarah A; Harnack, Lisa J; Oakes, J Michael; Story, Mary; Jeffery, Robert W; French, Simone A

    2008-12-01

    A convenience sample of adolescents and adults who regularly eat at fast-food restaurants were recruited to participate in an experimental trial to examine the effect of nutrition labeling on meal choices. As part of this study, participants were asked to indicate how strongly they agreed or disagreed with 11 statements to assess reasons for eating at fast-food restaurants. Logistic regression was conducted to examine whether responses differed by demographic factors. The most frequently reported reasons for eating at fast-food restaurants were: fast food is quick (92%), restaurants are easy to get to (80%), and food tastes good (69%). The least frequently reported reasons were: eating fast food is a way of socializing with family and friends (33%), restaurants have nutritious foods to offer (21%), and restaurants are fun and entertaining (12%). Some differences were found with respect to the demographic factors examined. It appears that in order to reduce fast-food consumption, food and nutrition professionals need to identify alternative quick and convenient food sources. As motivation for eating at fast-food restaurants appears to differ somewhat by age, sex, education, employment status, and household size, tailored interventions could be considered.

  9. Frequent gene conversion events between the X and Y homologous chromosomal regions in primates

    Directory of Open Access Journals (Sweden)

    Hirai Hirohisa

    2010-07-01

    Full Text Available Abstract Background Mammalian sex-chromosomes originated from a pair of autosomes. A step-wise cessation of recombination is necessary for the proper maintenance of sex-determination and, consequently, generates a four strata structure on the X chromosome. Each stratum shows a specific per-site nucleotide sequence difference (p-distance between the X and Y chromosomes, depending on the time of recombination arrest. Stratum 4 covers the distal half of the human X chromosome short arm and the p-distance of the stratum is ~10%, on average. However, a 100-kb region, which includes KALX and VCX, in the middle of stratum 4 shows a significantly lower p-distance (1-5%, suggesting frequent sequence exchanges or gene conversions between the X and Y chromosomes in humans. To examine the evolutionary mechanism for this low p-distance region, sequences of a corresponding region including KALX/Y from seven species of non-human primates were analyzed. Results Phylogenetic analysis of this low p-distance region in humans and non-human primate species revealed that gene conversion like events have taken place at least ten times after the divergence of New World monkeys and Catarrhini (i.e., Old World monkeys and hominoids. A KALY-converted KALX allele in white-handed gibbons also suggests a possible recent gene conversion between the X and Y chromosomes. In these primate sequences, the proximal boundary of this low p-distance region is located in a LINE element shared between the X and Y chromosomes, suggesting the involvement of this element in frequent gene conversions. Together with a palindrome on the Y chromosome, a segmental palindrome structure on the X chromosome at the distal boundary near VCX, in humans and chimpanzees, may mediate frequent sequence exchanges between X and Y chromosomes. Conclusion Gene conversion events between the X and Y homologous regions have been suggested, mainly in humans. Here, we found frequent gene conversions in the

  10. Shear elasticity of fluids at low-frequent shear influence.

    Science.gov (United States)

    Badmaev, Badma B; Budaev, Ochir R; Dembelova, Tuyana S; Damdinov, Bair B

    2006-12-22

    The visco-elastic properties of liquids have been investigated using acoustical resonance method. Piezoquatrz performed tangential oscillations on the main resonance frequency of 74 kHz contacts by the one end of horizontal surface with the studied liquid layer covered by quartz cover-plate. So the stagnant shear waves are installed in layer. The solution of interaction of piezoquartz-liquid layer-cover-plate gives three methods of determination of the real shear modulus (G) and the tangent of mechanical loss angle (tan theta) of liquid. The first method is realized at smaller thickness of liquid layer then the length of shear wave. Liquids of different classes have been studied using this method: polymer liquids, oils, glycols and alcohols. The second method is connected with the propagation of shear wave in liquid layer, parameters of which are determined the G and tan theta. And the third method is based on the determination of limit shift of resonance frequencies at completes damping of shear wave in thick layer of liquid. All these three methods give satisfactory agreement of results.

  11. Telehealth Regulatory and Legal Considerations: Frequently Asked Questions

    Directory of Open Access Journals (Sweden)

    Jana Cason

    2011-12-01

    Full Text Available As telehealth gains momentum as a service delivery model in the United States within the rehabilitation professions, regulatory and legal questions arise. This article examines the following questions:1. Is there a need to secure licenses in two states (i.e., where the practitioner resides, and where the client is located, before engaging in telehealth?2. Do state laws differ concerning if and how telehealth can occur?3. Do any states expressly disallow telehealth?4. Can services delivered through telehealth be billed the same way as services provided in-person?5. If practitioners fulfill the requirements to maintain licensure (e.g., continuing education obligations in their state of residence, do they also need to fulfill the requirements to maintain licensure for the state in which the client resides?6. Will professional malpractice insurance cover services delivered through telehealth?7. Does a sole practitioner need to abide by HIPAA regulations?Responses to these questions are offered to raise awareness of the regulatory and legal implications associated with the use of a telehealth service delivery model

  12. Test-retest of computerized health status questionnaires frequently used in the monitoring of knee osteoarthritis

    DEFF Research Database (Denmark)

    Gudbergsen, Henrik; Bartels, Else M.; Krusager, Peter

    2011-01-01

    .99. Analysis revealed a statistically significant difference between versions of the ADL Taxonomy, but not for the remaining questionnaires. Age, computer experience or education-level had no significant impact on the results. The computerized questionnaires were reported to be easier to use. CONCLUSION......ABSTRACT: BACKGROUND: To compare data based on touch screen to data based on traditional paper versions of questionnaires frequently used to examine patient reported outcomes in knee osteoarthritis patients and to examine the impact of patient characteristics on this comparison METHODS...... subgroups, completing either the paper or touch screen version first. Mean, mean differences (95% CI), median, median differences and Intraclass Correlation Coefficients (ICCs) were calculated for all questionnaires. RESULTS: ICCs between data based on computerized and paper versions ranged from 0.86 to 0...

  13. Frequent and distinct aberrations of DNA methylation patterns in fibrolamellar carcinoma of the liver.

    Directory of Open Access Journals (Sweden)

    Wolfgang Tränkenschuh

    Full Text Available BACKGROUND: Gene silencing due to aberrant DNA methylation is a frequent event in hepatocellular carcinoma (HCC and also in hepatocellular adenoma (HCA. However, very little is known about epigenetic defects in fibrolamellar carcinoma (FLC, a rare variant of hepatocellular carcinoma that displays distinct clinical and morphological features. METHODOLOGY/PRINCIPAL FINDINGS: We analyzed the methylation status of the APC, CDH1, cyclinD2, GSTπ1, hsa-mir-9-1, hsa-mir-9-2, and RASSF1A gene in a series of 15 FLC and paired normal liver tissue specimens by quantitative high-resolution pyrosequencing. Results were compared with common HCC arising in non-cirrhotic liver (n = 10. Frequent aberrant hypermethylation was found for the cyclinD2 (19% and the RASSF1A (38% gene as well as for the microRNA genes mir-9-1 (13% and mir-9-2 (33%. In contrast to common HCC the APC and CDH1 (E-cadherin genes were found devoid of any DNA methylation in FLC, whereas the GSTπ1 gene showed comparable DNA methylation in tumor and surrounding tissue at a moderate level. Changes in global DNA methylation level were measured by analyzing methylation status of the highly repetitive LINE-1 sequences. No evidence of global hypomethylation could be found in FLCs, whereas HCCs without cirrhosis showed a significant reduction in global methylation level as described previously. CONCLUSIONS: FLCs display frequent and distinct gene-specific hypermethylation in the absence of significant global hypomethylation indicating that these two epigenetic aberrations are induced by different pathways and that full-blown malignancy can develop in the absence of global loss of DNA methylation. Only quantitative DNA methylation detection methodology was able to identify these differences.

  14. Exergoeconomic and thermodynamics analysis of an autonomous distillery operating with different technologies of cogeneration and distillation; Analise termodinamica e exergoeconomica de uma destilaria autonoma operando com tecnologias diferentes de cogeracao e destilacao

    Energy Technology Data Exchange (ETDEWEB)

    Palacio, Jose Carlos Escobar; Lora, Electo Eduardo Silva; Venturini, Osvaldo Jose; Santos, Jose Joaquim; Reno, Maria Luiza Grillo [Universidade Federal de Itajuba (NEST/UNIFEI), MG (Brazil). Nucleo de Excelencia em Geracao Termeletrica e Distribuida; Moura, Adler [DEDINI Industrias de Base S.A., Piracicaba, SP (Brazil)

    2008-07-01

    The present work evaluates through thermodynamics and exergoeconomics the performance of an autonomous distillery. This is based in cogeneration systems which operate with different parameters and technologies. On the base of the carried out was possible to quantify the improvement obtained in the distillery performance indicators when it works with high steam parameters and technologies which increase the energy efficiency of distillation. (author)

  15. Estudos sociais em ciência e tecnologia e suas distintas abordagens Social studies in science and technology and its different approaches

    Directory of Open Access Journals (Sweden)

    Adriano Premebida

    2011-01-01

    Full Text Available Esta breve introdução aos Estudos Sociais em Ciência e Tecnologia (ESCT propõe expor os temas mais correntes e as distintas abordagens teóricas que fazem parte deste campo ainda novo de pesquisa. Busca-se fornecer um painel das disputas no exterior do campo, entre sociólogos e epistemólogos, e, no interior do campo, entre as distintas perspectivas sobre ciência e tecnologia que hoje ocupam sociólogos, antropólogos e cientistas políticos na composição deste rico cenário de pesquisa social.This short introduction to Social Studies in Science and Technology (SSST intends to present the usual issues and the different theoretical approaches that comprise this still new research field. It is sought to provide an outlook on the disputes, both external to this field - between sociologists and epistemologists - and internal to it, between distinct views on science and technology that concern, today, sociologists, anthropologists and political scientists within this rich scene of social research.

  16. Functional epigenomics identifies genes frequently silenced in prostate cancer.

    Science.gov (United States)

    Lodygin, Dimitri; Epanchintsev, Alexey; Menssen, Antje; Diebold, Joachim; Hermeking, Heiko

    2005-05-15

    In many cases, silencing of gene expression by CpG methylation is causally involved in carcinogenesis. Furthermore, cancer-specific CpG methylation may serve as a tumor marker. In order to identify candidate genes for inactivation by CpG methylation in prostate cancer, the prostate cancer cell lines LNCaP, PC3, and Du-145 were treated with 5-aza-2' deoxycytidine and trichostatin A, which leads to reversion of epigenetic silencing. By microarray analysis of 18,400 individual transcripts, several hundred genes were found to be induced when compared with cells treated with trichostatin A. Fifty re-expressed genes were selected for further analysis based on their known function, which implied a possible involvement in tumor suppression. Twelve of these genes showed a significant degree of CpG methylation in their promoters. Six genes were silenced by CpG methylation in the majority of five analyzed prostate cancer cell lines, although they displayed robust mRNA expression in normal prostate epithelial cells obtained from four different donors. In primary prostate cancer samples derived from 41 patients, the frequencies of CpG methylation detected in the promoter regions of these genes were: GPX3, 93%; SFRP1, 83%; COX2, 78%; DKK3, 68%; GSTM1, 58%; and KIP2/p57, 56%. Ectopic expression of SFRP1 or DKK3 resulted in decreased proliferation. The expression of DKK3 was accompanied by attenuation of the mitogen-activated protein kinase pathway. The high frequency of CpG methylation detected in the promoters of the identified genes suggests a potential causal involvement in prostate cancer and may prove useful for diagnostic purposes.

  17. Sensemaking technology

    DEFF Research Database (Denmark)

    Madsen, Charlotte Øland

    Research objective: The object of the LOK research project is to gain a better understanding of the technological strategic processes in organisations by using the concept/metaphor of sensemaking. The project will investigate the technological strategies in organisations in order to gain a deeper...... understanding of the cognitive competencies and barriers towards implementing new technology in organisations. The research will therefore concentrate on researching the development process in the organisation's perception of the external environmental elements of customers, suppliers, competitors, internal...... and external technology and legislation and the internal environmental elements of structure, power relations and political arenas. All of these variables have influence on which/how technologies are implemented thus creating different outcomes all depending on the social dynamics that are triggered by changes...

  18. Sensemaking technology

    DEFF Research Database (Denmark)

    Madsen, Charlotte Øland

    Research objective: The object of the LOK research project is to gain a better understanding of the technological strategic processes in organisations by using the concept/metaphor of sensemaking. The project will investigate the technological strategies in organisations in order to gain a deeper...... understanding of the cognitive competencies and barriers towards implementing new technology in organisations. The research will therefore concentrate on researching the development process in the organisation's perception of the external environmental elements of customers, suppliers, competitors, internal...... and external technology and legislation and the internal environmental elements of structure, power relations and political arenas. All of these variables have influence on which/how technologies are implemented thus creating different outcomes all depending on the social dynamics that are triggered by changes...

  19. High quality maize centromere 10 sequence reveals evidence of frequent recombination events

    Directory of Open Access Journals (Sweden)

    Thomas Kai Wolfgruber

    2016-03-01

    Full Text Available The ancestral centromeres of maize contain long stretches of the tandemly arranged CentC repeat. The abundance of tandem DNA repeats and centromeric retrotransposons (CR have presented a significant challenge to completely assembling centromeres using traditional sequencing methods. Here we report a nearly complete assembly of the 1.85 Mb maize centromere 10 from inbred B73 using PacBio technology and BACs from the reference genome project. The error rates estimated from overlapping BAC sequences are 7 x 10-6 and 5 x 10-5 for mismatches and indels, respectively. The number of gaps in the region covered by the reassembly was reduced from 140 in the reference genome to three. Three expressed genes are located between 92 and 477 kb of the inferred ancestral CentC cluster, which lies within the region of highest centromeric repeat density. The improved assembly increased the count of full-length centromeric retrotransposons from 5 to 55 and revealed a 22.7 kb segmental duplication that occurred approximately 121,000 years ago. Our analysis provides evidence of frequent recombination events in the form of partial retrotransposons, deletions within retrotransposons, chimeric retrotransposons, segmental duplications including higher order CentC repeats, a deleted CentC monomer, centromere-proximal inversions, and insertion of mitochondrial sequences. Double-strand DNA break (DSB repair is the most plausible mechanism for these events and may be the major driver of centromere repeat evolution and diversity. This repair appears to be mediated by microhomology, suggesting that tandem repeats may have evolved to facilitate the repair of frequent DSBs in centromeres.

  20. Not lack of ability but more choice: individual and gender differences in choice of careers in science, technology, engineering, and mathematics.

    Science.gov (United States)

    Wang, Ming-Te; Eccles, Jacquelynne S; Kenny, Sarah

    2013-05-01

    The pattern of gender differences in math and verbal ability may result in females having a wider choice of careers, in both science, technology, engineering, and mathematics (STEM) and non-STEM fields, compared with males. The current study tested whether individuals with high math and high verbal ability in 12th grade were more or less likely to choose STEM occupations than those with high math and moderate verbal ability. The 1,490 subjects participated in two waves of a national longitudinal study; one wave was when the subjects were in 12th grade, and the other was when they were 33 years old. Results revealed that mathematically capable individuals who also had high verbal skills were less likely to pursue STEM careers than were individuals who had high math skills but moderate verbal skills. One notable finding was that the group with high math and high verbal ability included more females than males.