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Sample records for base na geoquimica

  1. Reservoir geochemistry; Geoquimica de reservatorios

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Joelma Pimentel; Rangel, Mario Duncan; Morais, Erica Tavares de [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)], Emails: joelma.lopes@petrobras.com.br, mduncan@petrobras.com.br, ericat@petrobras.com.br; Aguiar, Helen G.M. de [Fundacao GORCEIX, Ouro Preto, MG (Brazil)], E-mail: helenaguiar.GORCEIX@petrobras.com.br

    2008-03-15

    Reservoir Geochemistry has many important practical applications during petroleum exploration, appraisal and development of oil fields. The most important uses are related to providing or disproving connectivity between reservoirs of a particular well or horizon. During exploration, reservoir geochemistry can indicate the direction of oil filling, suggesting the most appropriate places for drilling new wells. During production, studies of variations in composition with time and determination of proportions of commingled production from multiple zones, may also be carried out. The chemical constituents of petroleum in natural reservoirs frequently show measurable compositional variations, laterally and vertically. Due to the physical and chemical nature of petroleum changes with increasing maturity (or contribution of a second source during the filling process), lateral and vertical compositional variations exist in petroleum columns as reservoir filling is complete. Compositional variation can also be introduced by biodegradation or water washing. Once the reservoir is filled, density driven mixing and molecular diffusion tend to eliminate inherited compositional variations in an attempt to establish mechanical and chemical equilibrium in the petroleum column (England, 1990). Based on organic geochemical analysis it is possible to define these compositional variations among reservoirs, and use these data for developing of petroleum fields and for reservoir appraisal. Reservoir geochemistry offers rapid and low cost evaluation tools to aid in understanding development and production problems. Moreover, the applied methodology is relatively simple and gives reliable results, and can be performed routinely in any good geochemical laboratory at a relatively low cost. (author)

  2. Crustal evolution of South American Platform based on Sm-Nd isotope geochemistry; Evolucao crustal da plataforma sul americana com base na geoquimica isotopica Sm-Nd

    Energy Technology Data Exchange (ETDEWEB)

    Sato, Kei

    1998-07-01

    Sm-Nd isotopic systematics is relevant to the topics of origin and evolution the of continental crust, where model ages refer to the time when crustal material was differentiated from the upper mantle. Alternative interpretations are due to a lack of adequate information on crustal processes and the variable composition of the mantle sources. The Sm-Nd methods are presented, and applied on rock materials from the South American Platform. The main conclusions indicate juvenile accretion with higher growth rates (peaks), around 3.7-3.5 Ga ({approx} 0.5% in volume), 3.1 - 2.9 Ga ({approx}16%), 2.7 - 2.6 ({approx} 9%), 2.2 - 1.9 (35%) and 1.3-1.0 (7%). The continental growth curve indicates that about 35 % of the crust was formed by 2.5 Ga, 88% by 1.8 Ga and 99% by 1.0 Ga, and the remaining {approx} 1 % was added in the Phanerozoic. Rapid crustal growth occurred between 2.2 and 1.9 Ga. The main period of continental crust formation occurred during the Paleoproterozoic, corresponding to 54 % in volume. Sm-Nd model ages, when compared with the crystallisation ages of granitoid rocks, furnish a rough estimate of juvenile vs. reworked material. Within the South American Platform about 45% of juvenile continental crust is still preserved within tectonic provinces of different ages. The remainder represents continental crust reworked in younger tectono-thermal events. In particular crustal reworking was predominating over juvenile accretion during Meso-Neoproterozoic. The Transbrasiliano Lineament is a megasuture, active in the Neoproterozoic, which separates a large northwestern mass, including the Amazonian and Sao Luis Cratons, from a southeastern mass, formed by a collage of cratonic fragments, of which the Sao Francisco and Rio de La Plata are the largest. The crustal evolutions of these two large continental masses are considered individually, and can be resumed following form: I - Old Archean rocks (>3.4 Ga) are found only within the south-eastern part (Gaviao Block, Contendas-Mirante Complex (Sao Francisco Craton) and Caldas Brandao Massif (Borborema Province); 2 - On both continental masses, crustal evolution between 3.0 and 1.7 Ga is very similar; 3 - During Meso and Neoproterozoic times, the northwestern mass (Amazonian and Sao Luis Cratons) remained virtually unaffected by tectono-orogenic events, while the southeastern mass is composed of smaller cratonic fragments, which later took part in the formation of two large supercontinents: Rodinia during the Mesoproterozoic, and Gondwana in the Neoproterozoic. (author)

  3. Geologic evolution of the Paraiba do Sul complex, in the central part of the Ribeira belt, based on the geochemistry and U-Pb geochronology studies; Evolucao geologica do complexo Paraiba do Sul, no segmento central da faixa Ribeira, com base em estudos de geoquimica e geocronologia U-Pb

    Energy Technology Data Exchange (ETDEWEB)

    Valladares, Claudia Sayao

    1996-12-31

    Aiming the definition of the Complexo Paraiba do Sul evolution, the work presents a geochronological approach by the U-Pb method, considered appropriate to study polideformed terrains. The minerals used to the U-Pb dating (zircon, titanite and monazite) provides information about the ages of rock generation and the successive geological events the rocks were submitted. The U-Pb geochronological approach is pioneer in the investigated area and two questions referent to the Complexo Paraiba do Sul evolution in the central part of the Ribeira belt, were the aim of this approach. The first of them refers to the crystallization epoch and the gneisses metamorphism, interpreted here like orthogneisses, called Unidade Quirino of the Complexo Paraiba do Sul. The second refers to the metamorphism ages and meta sedimentary unit deformation. Looking for the contribution to the Complexo Paraiba do Sul evolution understanding, this work presents the data based on the geologic map of this area, comprising part of the Folha Volta Redonda (1:50.000), including petrographic, structural and microtectonic studies. It also presents and discusses the results of: 17 U-Pb analysis in zircon and titanite of the Complexo Paraiba do Sul orthogneisses collection; 24 geochemical analysis of major, minor, trace elements and ETR of the same collection; an U-Pb analysis in titanite of the Unidade Sao Joao, 5 U-Pb analysis in titanites and/or monazites of granites and granitoids; 12 geochemical analysis including major, minor and trace elements and ETR, in granites and sills of leucogranites. Finally, the data achieved were integrated with the objective to elaborate an evolutive view of the Complexo Paraiba do Sul 157 refs., 54 figs., 17 tabs.

  4. Study on Na layer response to geomagnetic activities based on Odin/OSIRIS Na density data

    Science.gov (United States)

    Tsuda, Takuo; Nakamura, Takuji; Hedin, Jonas; Gumbel, Jorg; Hosokawa, Keisuke; Ejiri, Mitsumu K.; Nishiyama, Takanori; Takahashi, Toru

    2016-07-01

    The Na layer is normally distributed from 80 to 110 km, and the height range is corresponding to the ionospheric D and E region. In the polar region, the energetic particles precipitating from the magnetosphere can often penetrate into the E region and even into the D region. Thus, the influence of the energetic particles to the Na layer is one of interests in the aspect of the atmospheric composition change accompanied with the auroral activity. There are several previous studies in this issue. For example, recently, we have reported an initial result on a clear relationship between the electron density increase (due to the energetic particles) and the Na density decrease from observational data sets obtained by Na lidar, EISCAT VHF radar, and optical instruments at Tromsoe, Norway on 24-25 January 2012. However, all of the previous studies had been carried out based on case studies by ground-based lidar observations. In this study, we have performed, for the first time, statistical analysis using Na density data from 2004 to 2009 obtained with the Optical Spectrograph and InfraRed Imager System (OSIRIS) onboard Odin satellite. In the presentation, we will show relationship between the Na density and geomagnetic activities, and its latitudinal variation. Based on these results, the Na layer response to the energetic particles will be discussed.

  5. Geochemical evidences of the boiling phenomena in Los Humeros geothermal field; Evidencias geoquimicas del fenomeno de ebullicion en el campo de Los Humeros

    Energy Technology Data Exchange (ETDEWEB)

    Munguia Bracamontes, Fernando; Lopez Mendiola, Juan Manuel [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1989-12-31

    The geochemical behavior of the fluids in the geothermal field Los Humeros suggests the existence of a reservoir of relatively low permeability, with hydrostatic pressure gradients and thermodynamic conditions of pressure-temperature close to the boiling point in stationary conditions, that is, non-disturbed. Nevertheless, the fluid geochemistry also indicates the presence of steam under stationary conditions, mainly in the fault, fracture, fissure, etc. zones. The steam diminishes progressively as the extraction time increases, being replaced by boiling fluid. [Espanol] El comportamiento geoquimico de los fluidos en el campo geotermico de Los Humeros sugiere la existencia de un yacimiento de relativa baja permeabilidad, con gradientes de presion hidrostatica y condiciones termodinamicas de presion-temperatura cercanas al punto de ebullicion a condiciones estables; es decir, no perturbadas. Sin embargo, la geoquimica de los fluidos tambien indica la existencia de vapor bajo condiciones estables, principalmente en las zonas de fallas, fracturas, fisuras, etc. El vapor disminuye progresivamente conforme aumenta el tiempo de extraccion, siendo reemplazado por fluido en ebullicion.

  6. Gas geochemistry of Los Humeros geothermal field, Mexico; Geoquimica de gases del campo geotermico de Los Humeros, Puebla, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Barragan R, Rosa Maria; Arellano G, Victor M; Nieva G, David; Portugal M, Enrique; Garcia G, Alfonso; Aragon A, Alfonso [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico); Torres A, Ignasio S [Centro de Investigacion en Energia, Temixco, Morelos (Mexico); Tovar A, Rigoberto [Comision Federal de Electricidad, Los Humeros, Puebla (Mexico)

    1999-12-01

    Gas data of Los Humeros geothermal field were analyzed. A new method, which is based on the Fischer-Tropch reactions and on the combined pyrite-magnetite mineral equilibrium, was used. Reservoir temperature and reservoir excess steam were estimated for the starting stage of the field by using early data taken from producing wells at controlled conditions. The same parameters were also obtained for the present stage by using 1997 gas data. Reservoir temperatures ranged from 275 and 337 Celsius degrees and positive values for reservoir excess steam fractions were obtained for the starting stage. For well H-1 no excess steam was found since this well was fed by the shallower liquid-dominated reservoir. Results for 1997 showed lower scattering compared to early data and the possible occurrence of a heating process in the shallower stratum which could due to exploitation. [Spanish] En este articulo se presenta un analisis de datos de la fase gaseosa producida por pozos productores del campo geotermico de Los Humeros mediante un metodo que considera el equilibrio de la reaccion de Fischer-Tropsh y el equilibrio de minerales pirita-hematia y pirita-magnetita. Este metodo provee la temperatura del yacimiento y el exceso de vapor presente en la descarga total de los pozos. Los resultados se discuten tanto para el estado inicial del yacimiento utilizando los primeros datos de produccion en los que el flujo del pozo estuvo controlado y los obtenidos en 1997 que representan el estado actual del yacimiento. En el estado inicial se estimaron temperaturas de yacimiento de entre 275 y 337 grados Celsius y excesos de vapor positivos, con excepcion del pozo H-1 que se alimenta del estrato somero dominado por liquido. Los resultados obtenidos para 1997 muestran una dispersion menor y la probable ocurrencia de un proceso de calentamiento del estrato somero propiciado por la explotacion.

  7. Alumina Solubility in KF-NaF-AlF3-Based Low-Temperature Electrolyte

    Science.gov (United States)

    Yan, Hengwei; Yang, Jianhong; Li, Wangxing; Chen, Shazi

    2011-10-01

    KF-NaF-AlF3-based electrolyte is a promising low-temperature electrolyte for aluminum reduction. Alumina solubility in molten KF-NaF-AlF3-based electrolyte was determined as a function of the melt composition and temperature by measuring the weight loss of a rotating corundum disk and by using a LECO RO500 oxygen analyzer (LECO Corporation, St. Joseph, MI). The investigated temperature range is 1023 K to 1073 K (750 °C to 800 °C), and the total cryolite molar ratio (CRt = ([KF] + [NaF])/[AlF3]) is 1.3 to 1.5; the content of NaF ranges from 0 mol pct to 50 mol pct. The effect of temperature, CaF2, and LiF on alumina solubility is discussed as well.

  8. Microstructural evolution in NaNbO3-based antiferroelectrics

    International Nuclear Information System (INIS)

    Our recent study found that CaZrO3 doping can effectively enhance the antiferroelectric P phase in NaNbO3 ceramics, leading to a double polarization hysteresis loop characteristic of a reversible antiferroelectric ↔ ferroelectric phase transition [Shimizu et al., Dalton Trans. 44, 10763 (2015)]. Here, a thorough transmission electron microscope study was performed to illustrate the CaZrO3 doping-assisted antiferroelectricity stabilization. In parallel to the bright-field imaging and selected area electron diffraction from multiple zone axes, detailed dark-field imaging was utilized to determine the superlattice structural origins, from either oxygen octahedral tilting or antiparallel cation displacements. By analogy with Pb(Zr1−xTix)O3 and rare-earth doped BiFeO3 systems, the chemical substitutions are such as to an induced polar-to-antipolar transition that is consistent with a tolerance factor reduction. The resultant chemical pressure has a similar effect to the compressive hydrostatic pressure where the antiferroelectric state is favored over the ferroelectric state

  9. Nanocomposite hydrogels based on water soluble polymer and montmorillonite-Na+

    Directory of Open Access Journals (Sweden)

    Fatiha Reguieg

    2015-09-01

    Full Text Available A series of composites hydrogels based on Poly (1,3-dioxolane (PDXL,water soluble polymer, were synthesized directly in water by free-radical homopolymerization of a,w-methacryloyloxy PDXL macromonomers using hydrophilic sodium Montmorillonite clay: Maghnite-Na+ (Mag-Na+ and potassium persulfate as an initiator. These materials were characterized by X-ray diffraction (XRD, Fourier transform infrared spectroscopy (FT-IR, thermogravimetric analysis (ATG and their equilibrium swelling behavior in water and were compared with those of pure hydrogels prepared without Mag-Na+. X-ray diffraction and Infrared spectroscopy confirmed insertion of clay into polymer. The thermal decomposition temperature of the hydrogels based on maghnite-Na+ was found to be higher than of pure hydrogels. At the same time, the influence of the macromonomer precursor molar mass value, its concentration and the quantities of Mag-Na+, on the values of the volume degree of equilibrium swelling were studied. The results showed that the volume degree of equilibrium swelling was investigated as a function of the clay content. However, whether the concentration of macromonomer precursor increased, the volume or weight degree of equilibrium swelling of hydrogels all decreased. The addition of Mag-Na+ particles changed the crosslinking density of hydrogels.

  10. In Situ Synthesis of NaY Zeolite with Coal-Based Kaolin

    Institute of Scientific and Technical Information of China (English)

    Xinmei Liu; Zifeng Yan; Huaiping Wang; Yantuo Luo

    2003-01-01

    NaY zeolites were in-situ synthesized from coal-based kaolin via the hydrothermal method.The effects of various factors on the structure of the samples were extensively investigated. The sampleswere characterized by N2 adsorption, XRD, IR and DTG-DTA methods, and the results show that thecrystallization temperature and amount of added water play an important role in the formation of the zeo-lite structure. The 4A and P zeolites are the competitive phase present in the resulting product. However,NaY zeolites with a higher relative crystallinity, excluding impure crystals and the well hydrothermal sta-bility, can be synthesized from coal-based kaolin. These zeolites possess a larger surface area and a narrowpore size distribution, and this means that optimization of this process might result in a commercial routeto synthesize NaY zeolites from coal-based kaolin.

  11. Amostragem seqüencial com base na lei de Taylor para levantamento de Spodoptera frugiperda na cultura do milho

    Directory of Open Access Journals (Sweden)

    Farias Paulo Roberto Silva

    2001-01-01

    Full Text Available A lagarta do cartucho do milho é uma das principais pragas do milho nas Américas, podendo ocorrer durante todos os estágios de crescimento da cultura, causando perdas de 15 a 37% na produção. Neste trabalho estudou-se a distribuição espacial dessa praga no campo, com a finalidade de desenvolver um sistema de amostragem para estimar sua densidade populacional. Na área cultivada com milho foram selecionados 3 campos experimentais de 40 m x 250 m cada, divididos em 100 parcelas cada. Foram contados o número de lagartas pequenas e grandes de S. frugiperda nas folhas e no cartucho das plantas, em 10 plantas ao acaso por parcela, num total de 1000 plantas por campo, em 5, 5 e 4 datas de amostragem, respectivamente. Lagartas menores que 1 cm eram consideradas pequenas e lagartas maiores que 1 cm, grandes. Foram estimados os parâmetros da lei de Taylor, sendo as estimativas dos parâmetros das regressões altamente significativas para todas as categorias larvais. O parâmetro b da lei de Taylor para lagarta pequena foi igual a 1,57, indicando que a forma de distribuição dessa categoria larval é agregada. Para lagartas grandes o parâmetro b foi igual a 0,79, o que conduz a um tipo de distribuição tendendo para aleatoriedade. Para o número total de lagartas os resultados são equivalentes aos obtidos para lagartas pequenas. Foi desenvolvido um plano de amostragem seqüencial com base nos parâmetros da lei de Taylor.

  12. Heavy metals in geochemical sediment fractions of the border region between Baja California, Mexico, and California, USA; Metales pesados en fracciones geoquimicas de sedimentos de la region fronteriza de Baja California, Mexico, y California, EUA

    Energy Technology Data Exchange (ETDEWEB)

    Villaescusa-Celaya, Julio A; Gutierrez-Galindo, Efrain A; Flores-Munoz, Gilberto [Instituto de Investigaciones Oceanologicas, Universidad Autonoma de Baja California, Ensenada, B.C., (Mexico)

    1997-03-01

    water in the coastal zone are being transported outside the region. [Spanish] En este estudio se evalua la concentracion de los metales pesados Cu, Zn, Ni, Cr, Pb, Cd, Ag, Mn y Fe en las diferentes fracciones geoquimicas del sedimento, como una medida para conocer el impacto de las descargas de agua residuales sobre los sedimentos costeros de la region. Para este proposito, durante un crucero oceanografico realizado en abril de 1992 (ECOBAC IV), se recolectaron 20 muestras de sedimento superficial en la plataforma costera de la region fronteriza de Baja California (Mexico) y California (EUA). Las muestras de sedimento se sometieron a un procedimiento de extraccion secuencial, disenado para obtener las fracciones geoquimicas operacionalmente definidas como: intercambiable (F1), carbonatos (F2), oxihidroxidos de Fe y Mn (F3), materia organica/sulfuros (F4) y residual o litogenica (F5). La especiacion operacional de los metales indica que las principales fases que acumulan metales en el sedimento son la matriz detrital o litogenica, los oxihidroxidos de Fe y Mn y la materia organica/sulfuros, en este orden. La distribucion espacial de los metales pesados en la fase reactiva (definida como la suma de F1-F4) presento, en general, una tendencia a aumentar en concentracion en sedimentos alejados de la costa. Los metales pesados en la fase reactiva aparentemente son controlados por la concentracion de hierro reactivo en los sedimentos, con excepcion del Pb, el Cd y la Ag. Esto sugiere que estos ultimos elementos son controlados por otros procesos, tales como el material particulado de origen biogenico. En contraste, la distribucion espacial de los metales pesados en la fase detrital presento un comportamiento inverso, esto es, las mayores concentraciones de metales se encuentran cercanas a la costa frente a la planta de tratamiento de aguas residuales de Punta Bandera, Baja California. Las concentraciones promedio de metales totales (suma de F1-F5) fueron de 7.6, 40, 21, 68

  13. HEDONISMO E MORALISMO: CONSUMO NA BASE DA PIRÂMIDE

    Directory of Open Access Journals (Sweden)

    Marcus Wilcox Hemais

    2013-03-01

    Full Text Available Economic stability in Brazil has allowed items that were formerly only accessible to the better-off social classes, to be consumed at ¨the bottom of the pyramid¨. This has aroused the interest of both the academic and business world and led to a desire for a better understanding of this phenomenon. Two lines of argument have arisen with distinct perspectives. The first supports a hedonistic approach, which believes that consumption at the base of the pyramid is driven by a wish to reduce poverty, while the other, where a moralistic standpoint is predominant, criticizes this view because it believes that people´s lives can only be improved by including people with less purchasing power in the production processes. One of the aims of this essay is thus to discuss how the literature on consumption at the bottom of the pyramid, shows features of these types of approaches. In addition, it seeks to encourage further studies by setting out a research agenda.

  14. Embutidos fortificados con proteína vegetal a base de quinua (Chenopodium quinoa Wild.)

    OpenAIRE

    Priscila Maldonado

    2010-01-01

    Español:El objetivo de esta investigación es substituir la mayor cantidad de proteína animal, por proteína vegetal a base de quinua, sin disminuir la calidad y aceptabilidad del producto, se optó por este pseudocereal ya que posee características nutricionales muy importantes para la alimentación humana. En la actualidad el país atraviesa por una crisis en la disponibilidad de alimentos y por una dependencia crítica de materia prima importada, por lo cual necesita de alternativas propias, que...

  15. High Resolution Detector Modules Based on NaI(T1) Arrays for Small Animal Imaging

    International Nuclear Information System (INIS)

    We are developing high spatial resolution detector modules based on recently available NaI(T1) crystal scintillator arrays that are capable of detecting photons over a range of energies. We report on the testing of an array with individual element sizes of 1 mm x 1 mm arrays over the energy range of 28 keV to 511 keV. It is anticipated that these detector modules could be applied to small animal imaging utilizing single photon emitters such as iodine-125 (28-35 keV) and technetium-99m (140 keV); and also positron emitters such as fluorine-18. The performance of a 5 cm square array of NaI(T1) crystal scintillators in which each element is 1 mm x 1 mm x 5 mm in dimension was measured. The NaI(T1) array manufactured by Saint-Gobain was coupled to Hamamatsu position sensitive photomultiplier tubes and tested over a range of photon energies. In particular, we tested the NaI(T1) array with the Hamamatsu model R2487 position sensitive photomultiplier tube and the new Hamamatsu model 85 00 flat panel position sensitive photomultiplier tube. Though the NaI(T1) module performed best for the single photon emitters its use in positron emission tomography applications for small animal imaging could be possible even though resulting sensitivity is not ideal

  16. High Density Hydrogen Storage System Demonstration Using NaAlH4 Based Complex Compound Hydrides

    Energy Technology Data Exchange (ETDEWEB)

    Daniel A. Mosher; Xia Tang; Ronald J. Brown; Sarah Arsenault; Salvatore Saitta; Bruce L. Laube; Robert H. Dold; Donald L. Anton

    2007-07-27

    This final report describes the motivations, activities and results of the hydrogen storage independent project "High Density Hydrogen Storage System Demonstration Using NaAlH4 Based Complex Compound Hydrides" performed by the United Technologies Research Center under the Department of Energy Hydrogen Program, contract # DE-FC36-02AL67610. The objectives of the project were to identify and address the key systems technologies associated with applying complex hydride materials, particularly ones which differ from those for conventional metal hydride based storage. This involved the design, fabrication and testing of two prototype systems based on the hydrogen storage material NaAlH4. Safety testing, catalysis studies, heat exchanger optimization, reaction kinetics modeling, thermochemical finite element analysis, powder densification development and material neutralization were elements included in the effort.

  17. NaNet-10: a 10GbE network interface card for the GPU-based low-level trigger of the NA62 RICH detector.

    Science.gov (United States)

    Ammendola, R.; Biagioni, A.; Fiorini, M.; Frezza, O.; Lonardo, A.; Lamanna, G.; Lo Cicero, F.; Martinelli, M.; Neri, I.; Paolucci, P. S.; Pastorelli, E.; Piandani, R.; Pontisso, L.; Rossetti, D.; Simula, F.; Sozzi, M.; Tosoratto, L.; Vicini, P.

    2016-03-01

    A GPU-based low level (L0) trigger is currently integrated in the experimental setup of the RICH detector of the NA62 experiment to assess the feasibility of building more refined physics-related trigger primitives and thus improve the trigger discriminating power. To ensure the real-time operation of the system, a dedicated data transport mechanism has been implemented: an FPGA-based Network Interface Card (NaNet-10) receives data from detectors and forwards them with low, predictable latency to the memory of the GPU performing the trigger algorithms. Results of the ring-shaped hit patterns reconstruction will be reported and discussed.

  18. Field Tests of a NaI(Tl)-Based Vehicle Portal Monitor at Border Crossings

    International Nuclear Information System (INIS)

    Radiation portal monitors are commonly used at international border crossings to detect illicit transport of radioactive material. Most monitors use plastic scintillators to detect gamma rays, but next-generation monitors may contain NaI(Tl). In order to directly compare the performance of the two types of detectors, a prototype NaI(Tl) monitor was tested at two international border crossings adjacent to a comparable plastic scintillator monitor. The NaI(Tl) monitor housed four large detectors, each 10.2 cm x 10.2 cm x 41 cm. The empirical data set from the two field tests contains approximately 3800 passages with known cargo loads for each vehicle For a small subset of the vehicles, high purity germanium detector spectra were also collected. During the survey period several vehicles containing commercial products with naturally occurring radioactive material (NORM) passed through the monitor. Typical NORM cargo included pottery, large granite slabs, rock-based floor tiles, construction stone blocks, abrasive material, and fertilizer. Non-NORM sources encountered during the field tests included a large source of 60Co (200,000 GBq) and a shipment of uranium oxide, both items being legally transported. The information obtained during the tests provides a good empirical data set to compare the effectiveness of NaI(Tl) and plastic-scintillator portal monitors. The capability to be sensitive to illicit materials, but not alarm on NORM, is a key figure of merit for portal monitors

  19. Emulsion-based synthesis of NaA zeolite nanocrystals and its integration towards NaA membranes

    Indian Academy of Sciences (India)

    M K Naskar; A Das; D Kundu; M Chatterjee

    2011-07-01

    NaA zeolite nanoparticles (seed crystals) of size 50–65 nm were synthesized using water-in-oil (w/o) type emulsions at a considerably low temperature of 65 ± 1°C in a short duration of 2 h. The emulsions were stabilized using non-ionic surfactants e.g. sorbitan monooleate (Span 80), sorbitan monolaurate (Span 20), polyoxyethylene(5)nonylphenylether with ethoxy numbers of 5 (Igepal CO-520) and polyoxyethylene sorbitan monooleate (Tween 80) of hydrophilic-lipophilic balance (HLB) values of 4.3, 8.6, 10 and 15 respectively. Among the surfactants, the intermediate HLB values of 8.6 (Span 20) and 10 (Igepal CO-520) were effective in synthesizing highly dispersible NaA nanoparticles of size 50–65 nm. The membrane prepared hydrothermally in multi-steps at 65 ± 1°C, using the Span 20-derived seed crystals deposited on porous support, showed the formation of high quality interlocked NaA coating. Single gas nitrogen (N2) permeation of the membrane exhibited a permeance value of 1.01 × 10-8 mol m-2 s-1 Pa-1 at ambient temperature (30°C).

  20. A new automated NaCl based robust method for routine production of gallium-68 labeled peptides

    International Nuclear Information System (INIS)

    A new NaCl based method for preparation of gallium-68 labeled radiopharmaceuticals has been adapted for use with an automated gallium-68 generator system. The method was evaluated based on 56 preparations of [68Ga]DOTATOC and compared to a similar acetone-based approach. Advantages of the new NaCl approach include reduced preparation time (97%), and specific activity (>40 MBq nmole−1 [68Ga]DOTATOC) and is well-suited for clinical production of radiopharmaceuticals. - Highlights: ► A NaCl based automated production of Ga-68-radiopharmaceuticals is described. ► Using 5 M NaCl for pre-purification of 68Ga eliminates the need for organic solvents. ► The method provides for high efficiency, specific activity, and radiochemical purity. ► The new method eliminates the need for the quality control by gas chromatography

  1. Geochemistry of the waters of the Descoberto River hydrographic basin, Brasilia/DF - Brazil; Geoquimica das aguas da bacia hidrografica do Rio Descoberto, Brasilia/DF - Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Carmo, Marcileia Silva do [Universidade Federal do Para, Belem, PA (Brazil). Centro de Geociencias]. E-mail: marcileia@ufpa.br; Boaventura, Geraldo Resende [Universidade de Brasilia, DF (Brazil). Inst. de Geociencias; Oliveira, Edivan Costa [Centro Federal de Educacao Tecnologica do Para (CEFET-PA), Belem, PA (Brazil). Coordenacao de Quimica

    2005-07-15

    The objective of this paper is to investigate the physical and chemical quality of the water of the Descoberto River during the dry and rainy seasons by measuring pH, temperature, electric conductivity, total dissolved solids, turbidity, color, alkalinity and NO{sub 3}-, SO{sub 4}{sup 2-}, PO{sub 4}{sup 3-}, NH{sub 4}+, Cl{sup -} and HCO{sub 3}-, and the elements Sr, Mo, Cd, Y, Ti, Ca, V, Mg, Fe, Si, Ni, Zr, Cu, Al, Cr, Mn, Ba, Co, Zn, P, Na and K. The results showed high concentrations in both seasons, with dilution along the course of the river, minimizing for a while problems that compromise the quality of the water of this source. However, a progressive deterioration can occur due to an increase in the discharge of pollutants, resulting from population growth, agricultural activities and other factors. (author)

  2. Agricultura orgânica em áreas urbanas e periurbanas com base na agroecologia.

    OpenAIRE

    Aquino, Adriana Maria de; Assis, Renato Linhares de

    2007-01-01

    A agricultura orgânica com base na agroecologia é o mote tecnológico adequado à realidade dos agroecossistemas urbanos. Este artigo ressalta a necessidade de se desenvolver tecnologias e insumos específicos. A partir de experiências com agricultura urbana em diferentes países em desenvolvimento, evidencia-se a necessidade de se buscar capacidades locais e apoio do poder público, especialmente nas iniciativas da sociedade organizada e mobilizada para a produção agrícola urbana.

  3. Virtualised data production infrastructure for NA61/SHINE based on CernVM

    International Nuclear Information System (INIS)

    Traditionally, the NA61/SHINE data production is performed by manually submitting jobs to the CERN batch system. An effort is now under way to migrate the data production to an automatic system, on top of a virtualised platform based on CernVM. This will make it easier to both initiate new data productions, and to utilise computing resources available outside CERN. In addition, there is a data preservation perspective. CernVM is a Linux distribution created by CERN specifically for the needs of virtual machines. Data production software and calibration data are distributed globally via the HTTP-based CernVM file system. The NA61/SHINE data production software has been adapted to run under CernVM through CernVM file system. Databases are used to keep track of the data. This will allow the system to present lists of both raw and produced data. If a new data production is needed, the privileged user may choose the data, software versions, and calibrations to be used. Finished jobs will be scanned for errors, and automatically resubmitted for processing if needed. A web-based, graphical user interface for the data production will be available. Finally, the relevant databases will be updated to reflect the freshly produced data.

  4. NaNet: a flexible and configurable low-latency NIC for real-time trigger systems based on GPUs

    CERN Document Server

    Ammendola, R; Frezza, O; Lamanna, G; Lonardo, A; Cicero, F Lo; Paolucci, P S; Pantaleo, F; Rossetti, D; Simula, F; Sozzi, M; Tosoratto, L; Vicini, P

    2014-01-01

    NaNet is an FPGA-based PCIe X8 Gen2 NIC supporting 1/10 GbE links and the custom 34~Gbps APElink channel. The design has GPUDirect RDMA capabilities and features a network stack protocol offloading module, making it suitable for building low-latency, real-time GPU-based computing systems. We provide a detailed description of the NaNet hardware modular architecture. Benchmarks for latency and bandwidth for GbE and APElink channels are presented, followed by a performance analysis on the case study of the GPU-based low level trigger for the RICH detector in the NA62 CERN experiment, using either the NaNet GbE and APElink channels. Finally, we give an outline of project future activities.

  5. Embutidos fortificados con proteína vegetal a base de quinua (Chenopodium quinoa Wild.

    Directory of Open Access Journals (Sweden)

    Priscila Maldonado

    2010-12-01

    Full Text Available Español:El objetivo de esta investigación es substituir la mayor cantidad de proteína animal, por proteína vegetal a base de quinua, sin disminuir la calidad y aceptabilidad del producto, se optó por este pseudocereal ya que posee características nutricionales muy importantes para la alimentación humana. En la actualidad el país atraviesa por una crisis en la disponibilidad de alimentos y por una dependencia crítica de materia prima importada, por lo cual necesita de alternativas propias, que fomenten el consumo de productos nativos y autóctonos. Al elaborar productos con materia prima disponible en el país logramos disminuir la dependencia externa y promover el trabajo interno y por ende contribuir a garantizar la Soberanía Alimentaria. La Soberanía Alimentaria es el derecho de los pueblos a definir sus propias políticas y estrategias sustentables de producción, distribución y consumo de alimentos que garanticen el derecho a la alimentación para toda la población, con base en la pequeña y medi

  6. NaNet:a low-latency NIC enabling GPU-based, real-time low level trigger systems

    CERN Document Server

    Ammendola, Roberto; Fantechi, Riccardo; Frezza, Ottorino; Lamanna, Gianluca; Cicero, Francesca Lo; Lonardo, Alessandro; Paolucci, Pier Stanislao; Pantaleo, Felice; Piandani, Roberto; Pontisso, Luca; Rossetti, Davide; Simula, Francesco; Sozzi, Marco; Tosoratto, Laura; Vicini, Piero

    2014-01-01

    We implemented the NaNet FPGA-based PCI2 Gen2 GbE/APElink NIC, featuring GPUDirect RDMA capabilities and UDP protocol management offloading. NaNet is able to receive a UDP input data stream from its GbE interface and redirect it, without any intermediate buffering or CPU intervention, to the memory of a Fermi/Kepler GPU hosted on the same PCIe bus, provided that the two devices share the same upstream root complex. Synthetic benchmarks for latency and bandwidth are presented. We describe how NaNet can be employed in the prototype of the GPU-based RICH low-level trigger processor of the NA62 CERN experiment, to implement the data link between the TEL62 readout boards and the low level trigger processor. Results for the throughput and latency of the integrated system are presented and discussed.

  7. Time-dependent growth of ceramic supported NaA membranes : a morphological and permeation based study / Jaco Zah

    OpenAIRE

    Zah, Jaco

    2006-01-01

    Based on its ideal aperture size (4.1 A) and hydrophilic framework, the NaA membrane possesses significant potential in the separation of many industrially important gaseous and liquid mixtures. In the local South African context, the foreseeable production of affordable, high-purity ethanol in the alternative fuel market exemplifies one such a possibility. However, there are still certain aspects to the composite NaA membrane that are not clearly understood. These include the tim...

  8. The necessity of renovation of the fundamental concepts of geochemistry for the geothermal systems; La necesidad de renovacion de los conceptos fundamentales de geoquimica para los sistemas geotermicos

    Energy Technology Data Exchange (ETDEWEB)

    Mahendra Jaiswal, Pal Verma [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    1999-07-01

    In this article the exhaustive experimentation of the compilation of the experimental data of quartz solubility is presented along with the saturation curve water - steam and in the zone of compressed liquid. On the base of these data a regression relation was derived, which is valid for the entire range of temperature from 0 to 374 Celsius degrees. This study was developed by Mahendra Pal Verma Jaiswal, researcher of the Instituto de Investigaciones Electricas (IIE) [Spanish] En este articulo se presenta el experimento exhaustivo de la recopilacion de los datos experimentales de la solubilidad de cuarzo a lo largo de la curva de saturacion agua - vapor y en la zona de liquido comprimido. Sobre la base de estos datos se derivo una relacion de regresion, la cual es valida para todo el rango de temperatura desde 0 a 374 grados Celsius. Este estudio fue desarrollado por Mahendra Pal Verma Jaiswal, investigador del Instituto de Investigaciones Electricas (IIE)

  9. Base de dados INDEX PSI: recurso informacional na área de psicologia utilizando interface WWWIsis

    Directory of Open Access Journals (Sweden)

    Rosa Maria Vivona B. de Oliveira

    2000-01-01

    Full Text Available A Base de Dados Bibliográfica INDEX PSI (http://www.psicologia-online.org.br/index.html surgiu de um convênio firmado entre o Sistema de Bibliotecas e Informação da PUC-Campinas e o Conselho Federal de Psicologia, objetivando a organização da produção científica nacional na área de Psicologia, focalizando artigos de periódicos publicados no período de 1980 a 1999 com a finalidade de disseminação da informação gerada e preservação da memória científica. Utilizou-se, para entrada de dados, o software CDS-Microisis, versão 3.07 para DOS e interface WWWIsis para acesso via WEB. A Base INDEX PSI será objeto de construção de Biblioteca Virtual na área de Psicologia. The bibliographic database INDEX PSI was established through an agreement between the Information and Library System of PUC-Campinas and the Brazilian Federal Psychology Council, aiming at the organization of the national scientific production in the Psychology field. It focuses on serial articles published from 1980 to 1999, in order to disseminate the information produced and to preserve the scientific memory. To input data at this database it was used the software CDS-Microisis DOS version 3.07, and the interface WWWIsis to access through WEB. INDEX PSI as intended to be the beginning of a Psychology Virtual Library.

  10. A study on (K, Na) NbO3 based multilayer piezoelectric ceramics micro speaker

    International Nuclear Information System (INIS)

    A flat panel micro speaker was fabricated from (K, Na) NbO3 (KNN)-based multilayer piezoelectric ceramics by a tape casting and cofiring process using Ag-Pd alloys as an inner electrode. The interface between ceramic and electrode was investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). The acoustic response was characterized by a standard audio test system. We found that the micro speaker with dimensions of 23 × 27 × 0.6 mm3, using three layers of 30 μm thickness KNN-based ceramic, has a high average sound pressure level (SPL) of 87 dB, between 100 Hz–20 kHz under five voltage. This result was even better than that of lead zirconate titanate (PZT)-based ceramics under the same conditions. The experimental results show that the KNN-based multilayer ceramics could be used as lead free piezoelectric micro speakers. (paper)

  11. In Vitro Priming of Naı̈ve T-cells with p-Phenylenediamine and Bandrowski's Base.

    Science.gov (United States)

    Gibson, Andrew; Kim, Seung-Hyun; Faulkner, Lee; Evely, Jane; Pirmohamed, Munir; Park, Kevin B; Naisbitt, Dean J

    2015-10-19

    p-Phenylenediamine (PPD) is a component of hair dye formulations that is associated with T-cell mediated allergic contact dermatitis. Antigen-specific T-cells from allergic contact dermatitis patients are activated with either PPD or the oxidation product, Bandrowski's base. In nonallergic individuals, T-cells that are activated by Bandrowski's base, but not by PPD, are readily detectable. The aim of the current study was to use an in vitro T-cell priming assay to assess the activation of memory and naı̈ve T-cells from healthy donors with PPD and Bandrowski's base, and to compare these responses to those observed from allergic patients. Both PPD and Bandrowski's base-responsive clones were generated from allergic patients. The majority of Bandrowski's base-responsive clones were CD4+ and displayed a lack of PPD reactivity. In contrast, CD4+ and CD8+ clones displaying PPD reactivity were detected. Approximately 25% of these displayed low levels of reactivity to Bandrowski's base. Clones from the allergic patients secreted a range of cytokines including IFN-γ, Il-13, and Il-22. In healthy donors, Bandrowski's base-specific T-cell proliferative responses and cytokine secretion were detected with both naı̈ve and memory T-cells. T-cell clones generated from the Bandrowski's base-responsive cultures responded to Bandrowski's base but not PPD. PPD-specific naı̈ve and memory T-cell responses were not detected from healthy donors. These data show that Bandrowski's base stimulates pre-existing memory T-cells isolated from healthy donors and primes naı̈ve T-cells when the chemical is bound to autologous dendritic cells. Priming naı̈ve T-cells against PPD failed, suggesting an important individual susceptibility factor is missing from the in vitro T-cell priming assay. PMID:26355666

  12. Naïve Bayesian Learning based Multi Agent Architecture for Telemedicine

    Directory of Open Access Journals (Sweden)

    Ei Ei Chaw

    2013-04-01

    Full Text Available Agent-based systems are one of the most vibrant and important areas of the research and development to have emerged in Information Technology in recent years. They are one of the most promising approaches for designing and implementing autonomous, intelligent and social software assistants capable of supporting human decision-making. These kinds of systems are believed to be appropriate in many aspects of the healthcare domain. As a result, there is a growing interest of researchers in the application of agent-based techniques to problems in the healthcare domain. The adoption of agent technologies and multi-agent constitutes an emerging area in bioinformatics. Multi-agent based medical diagnosis systems may improve traditionally developed medical computational systems and may also support medical staff in decision-making. In this paper, we simulate the multi agent system for cancer classification. The proposed architecture consists of service provider agents as upper layer agent, coordinator agent as middle layer agent and initial agent lowest layer agent. Coordinator agent serves as matchmaker agent that uses Naïve Bayesian learning method for obtaining general knowledge and selects the best service provider agent using matchmaking mechanism. Therefore this system can reduce the communication overhead between agents for sending messages and transferring data and can avoid sending the problem to irrelevant agents.

  13. NaVirCept - Nucleic Acid-Based Anti-Viral Project

    International Nuclear Information System (INIS)

    Vaccines are generally considered to be the most effective countermeasures to bacterial and viral diseases, however, licensed vaccines against many disease agents are either not available or their efficacies have not been demonstrated. Vaccines are generally agent specific in terms of treatment spectrum and are subject to defeat through natural mutation or through directed efforts. With respect to viral therapeutics, one of the major limitations associated with antiviral drugs is acquired drug resistance caused by antigenic shift or drift. A number of next-generation prophylactic and/or therapeutic measures are on the horizon. Of these, nucleic acid-based drugs are showing great antiviral potential. These drugs elicit long-lasting, broad spectrum protective immune responses, especially to respiratory viral pathogens. The Nucleic Acid-Based Antiviral (NaVirCept) project provides the opportunity to demonstrate the effectiveness of novel medical countermeasures against military-significant endemic and other viral threat agents. This project expands existing DRDC drug delivery capability development, in the form of proprietary liposome intellectual property, by coupling it with leading-edge nucleic acid-based technology to deliver effective medical countermeasures that will protect deployed personnel and the warfighter against a spectrum of viral disease agents. The technology pathway will offer a means to combat emerging viral diseases or modified threat agents such as the bird flu or reconstructed Spanish flu without going down the laborious, time-consuming and expensive paths to develop countermeasures for each new and/or emerging viral disease organism.(author)

  14. EMPREENDEDORISMO: PRODUÇÃO CIENTÍFICA NA BASE SCIELO 2004-2008

    Directory of Open Access Journals (Sweden)

    Amelia Silveira

    2010-09-01

    Full Text Available O empreendedorismo se apresenta como estratégia em organizações. Analisar a produção científica deste tema nos artigos de periódicos científicos indexados na base de dados do SciELO - Scientific Electronic Library Online foi o objetivo de estudo. Esta base apresenta resultados de estudos realizados em países como Argentina, Brasil, Chile, Colômbia, Cuba, Espanha, México, Portugal e Venezuela. Inicialmente, a pesquisa exploratória, com método qualitativo, adotou a análise de conteúdo. Em seguida, foi descritiva, com método quantitativo, utilizando estatística descritiva. Para construção da rede de relacionamento entre os autores foi adotado o software UCINET® versão 6.0. Dentre outros resultados cabe destacar que a maioria dos artigos foi publicada em periódicos brasileiros, existindo convergência entre as obras analisadas quanto aos autores que servem como fundamentação ao conceito de empreendedorismo, bem como aos termos recorrentes do significado do empreendedorismo. Este fenômeno em suas abordagens e perspectivas apresentou múltiplas facetas, merecendo novas abordagens de análise.

  15. CORROSION OF AMORPHOUS AND NANOCRYSTALLINE Fe-BASED ALLOYS IN NaCl AND H2SO4 SOLUTIONS

    Science.gov (United States)

    Li, Xiang; Lu, Wei; Wang, Yuxin; Yan, Biao; Pan, Deng

    2013-07-01

    Corrosion resistance of nanocrystalline Fe73.5Si13.5B9Nb3Cu1 alloy was investigated and compared to its amorphous counterpart. Low-temperature crystallization occurred during the annealing of amorphous tapes was used to obtain a nanocrystalline structure. The influence of annealing condition on the structure and corrosion resistance of the alloy in NaCl and H2SO4 solutions was investigated. Based on the testing results, it was found that nanocrystalline tapes have higher corrosion resistance than amorphous counterpart and H2SO4 can promote the occurrence of corrosion compared with NaCl.

  16. GPU-based Real-time Triggering in the NA62 Experiment

    CERN Document Server

    Ammendola, R; Cretaro, P.; Di Lorenzo, S.; Fantechi, R.; Fiorini, M.; Frezza, O.; Lamanna, G.; Lo Cicero, F.; Lonardo, A.; Martinelli, M.; Neri, I.; Paolucci, P.S.; Pastorelli, E.; Piandani, R.; Pontisso, L.; Rossetti, D.; Simula, F.; Sozzi, M.; Vicini, P.

    2016-01-01

    Over the last few years the GPGPU (General-Purpose computing on Graphics Processing Units) paradigm represented a remarkable development in the world of computing. Computing for High-Energy Physics is no exception: several works have demonstrated the effectiveness of the integration of GPU-based systems in high level trigger of different experiments. On the other hand the use of GPUs in the low level trigger systems, characterized by stringent real-time constraints, such as tight time budget and high throughput, poses several challenges. In this paper we focus on the low level trigger in the CERN NA62 experiment, investigating the use of real-time computing on GPUs in this synchronous system. Our approach aimed at harvesting the GPU computing power to build in real-time refined physics-related trigger primitives for the RICH detector, as the the knowledge of Cerenkov rings parameters allows to build stringent conditions for data selection at trigger level. Latencies of all components of the trigger chain have...

  17. New-concept Batteries Based on Aqueous Li+/Na+ Mixed-ion Electrolytes

    OpenAIRE

    Liang Chen; Qingwen Gu; Xufeng Zhou; Saixi Lee; Yonggao Xia; Zhaoping Liu

    2013-01-01

    Rechargeable batteries made from low-cost and abundant materials operating in safe aqueous electrolytes are attractive for large-scale energy storage. Sodium-ion battery is considered as a potential alternative of current lithium-ion battery. As sodium-intercalation compounds suitable for aqueous batteries are limited, we adopt a novel concept of Li+/Na+ mixed-ion electrolytes to create two batteries (LiMn2O4/Na0.22MnO2 and Na0.44MnO2/TiP2O7), which relies on two electrochemical processes. On...

  18. Construction of naïve camelids VHH repertoire in phage display-based library.

    Science.gov (United States)

    Sabir, Jamal S M; Atef, Ahmed; El-Domyati, Fotouh M; Edris, Sherif; Hajrah, Nahid; Alzohairy, Ahmed M; Bahieldin, Ahmed

    2014-04-01

    Camelids have unique antibodies, namely HCAbs (VHH) or commercially named Nanobodies(®) (Nb) that are composed only of a heavy-chain homodimer. As libraries based on immunized camelids are time-consuming, costly and likely redundant for certain antigens, we describe the construction of a naïve camelid VHHs library from blood serum of non-immunized camelids with affinity in the subnanomolar range and suitable for standard immune applications. This approach is rapid and recovers VHH repertoire with the advantages of being more diverse, non-specific and devoid of subpopulations of specific antibodies, which allows the identification of binders for any potential antigen (or pathogen). RNAs from a number of camelids from Saudi Arabia were isolated and cDNAs of the diverse vhh gene were amplified; the resulting amplicons were cloned in the phage display pSEX81 vector. The size of the library was found to be within the required range (10(7)) suitable for subsequent applications in disease diagnosis and treatment. Two hundred clones were randomly selected and the inserted gene library was either estimated for redundancy or sequenced and aligned to the reference camelid vhh gene (acc. No. ADE99145). Results indicated complete non-specificity of this small library in which no single event of redundancy was detected. These results indicate the efficacy of following this approach in order to yield a large and diverse enough gene library to secure the presence of the required version encoding the required antibodies for any target antigen. This work is a first step towards the construction of phage display-based biosensors useful in disease (e.g., TB or tuberculosis) diagnosis and treatment. PMID:24702893

  19. A physiologically based pharmacokinetic model for lactational transfer of Na-131I

    Science.gov (United States)

    Turner, Anita Loretta

    The excretion of radionuclides in human breast milk after administration of radiopharmaceuticals is a concern as a radiation risk to nursing infants. It is not uncommon to administer radiopharmaceuticals to lactating patients due to emergency nuclear medicine investigations such as thyroid complications, kidney failure, and pulmonary embolism. There is a need to quantify the amount of radioactivity translocated into breast milk in cases of ingestion by a breast-fed infant. A physiologically based pharmacokinetic model (PBPK) and a modified International Commission on Radiological Protection (ICRP) model have been developed to predict iodine concentrations in breast milk after ingestion of radioiodine by the mother. In the PBPK model, all compartments are interconnected by blood flow and represent real anatomic tissue regions in the body. All parameters involved are measurable values with physiological or physiochemical meaning such as tissue masses, blood flow rates, partition coefficients and cardiac output. However, some of the parameters such as the partition coefficients and metabolic constants are not available for iodine and had to be inferred from other information. The structure of the PBPK model for the mother consists of the following tissue compartments: gastrointestinal tract, blood, kidney, thyroid, milk, and other tissues. With the exception of the milk compartment, the model for the nursing infant is structured similarly to the mother. The ICRP model describing iodine metabolism in a standard 70-kg man was modified to represent iodine metabolism in a lactating woman and nursing infant. The parameters involved in this model are transfer rates and biological half-lives which are based on experimental observations. The results of the PBPK model and the modified ICRP model describing the lactational transfer of iodine were compared. When administering 1 mCi of Na131I to the lactating mother, the concentration reaches a maximum of 0.1 mCi/liter in 24

  20. Recycling of Na in advanced life support: strategies based on crop production systems.

    Science.gov (United States)

    Guntur, S V; Mackowiak, C; Wheeler, R M

    1999-01-01

    Sodium is an essential dietary requirement in human nutrition, but seldom holds much importance as a nutritional element for crop plants. In Advanced Life Support (ALS) systems, recycling of gases, nutrients, and water loops is required to improve system closure. If plants are to play a significant role in recycling of human wastes, Na will need to accumulate in edible tissues for return to the crew diet. If crops fail to accumulate the incoming Na into edible tissues, Na could become a threat to the hydroponic food production system by increasing the nutrient solution salinity. Vegetable crops of Chenopodiaceae such as spinach, table beet, and chard may have a high potential to supply Na to the human diet, as Na can substitute for K to a large extent in metabolic processes of these crops. Various strategies are outlined that include both genetic and environmental management aspects to optimize the Na recovery from waste streams and their resupply through the human diet in ALS. PMID:11542242

  1. A novel salinity proxy based on Na incorporation into foraminiferal calcite

    Directory of Open Access Journals (Sweden)

    J. C. Wit

    2013-10-01

    Full Text Available Salinity and temperature determine seawater density, and differences in both thereby control global thermohaline circulation. Whereas numerous proxies have been calibrated and applied to reconstruct temperature, a direct and independent proxy for salinity is still missing. Ideally, a new proxy for salinity should target one of the direct constituents of dissolved salt, such as [Na+] or [Cl−]. This study investigates the impact of salinity on foraminiferal Na/Ca values by laser ablation ICP-MS analyses of specimens of the benthic foraminifer Ammonia tepida cultured at a range of salinities (30.0–38.6. Foraminifera at lower salinities (30.0 and 32.5 added more chambers (10–11 to their test over the course of the culturing experiment than those maintained at higher salinities (36.1, 7–8 chambers, and 38.6, 6–7 chambers, suggesting that growth rates in this species are promoted by lower salinities. The Na/Ca of cultured specimens correlates significantly with seawater salinity (Na/Ca = 0.22S–0.75, R2 = 0.96, p DNa vary between 5.17 and 9.29 mmol mol−1 and 0.12–0.16 × 10−3, which are similar to values from inorganic precipitation experiments. The significant correlation between test size and Na/Ca results from co-variation with salinity. This implies that foraminiferal Na/Ca could serve as a robust and independent proxy for salinity, enabling salinity reconstructions independent of calcitic δ18O.

  2. Bases psicobiológicas de la adicción a cocaína

    OpenAIRE

    Rodríguez-Jiménez, R.; Ponce, G.; Jiménez-Arriero, M.A.; Bagney, A.; Cubillo, A I; Aragües, M.; Rubio, G; Palomo, T.

    2006-01-01

    El principal mecanismo de acción de la cocaína es la inhibición de la recaptación de dopamina y noradrenalina, produciendo un aumento de estos neurotransmisores en la sinapsis. El consumo agudo de cocaína produce una serie de cambios bastante conocidos en el sistema cerebral de recompensa. Sin embargo, el consumo crónico, produce, además, otra serie de cambios a nivel molecular que llevan al sujeto desde una situación de consumo puntual, a una situación de dependencia. Se han propuesto difere...

  3. A low cost, all-organic Na-ion Battery Based on Polymeric Cathode and Anode

    OpenAIRE

    Wenwen Deng; Xinmiao Liang; Xianyong Wu; Jiangfeng Qian; Yuliang Cao; Xinping Ai; Jiwen Feng; Hanxi Yang

    2013-01-01

    Current battery systems have severe cost and resource restrictions, difficultly to meet the large scale electric storage applications. Herein, we report an all-organic Na-ion battery using p-dopable polytriphenylamine as cathode and n-type redox-active poly(anthraquinonyl sulphide) as anode, excluding the use of transition-metals as in conventional electrochemical batteries. Such a Na-ion battery can work well with a voltage output of 1.8 V and realize a considerable specific energy of 92 Wh ...

  4. Corrosion resistance of FeAl intermetallic phase based alloy in water solution of NaCl

    OpenAIRE

    J. Cebulski; S. Lalik; R. Michalik

    2008-01-01

    Purpose: Recognizing of corrosion mechanisms in liquid mediums can lead to obtain corrosion-proof material e.g. by applying passivation phenomenon. In this paper attention was paid to determine the corrosion resistance of Fe40Al intermetallic phase based alloy in corrosive medium of liquid NaCl. Research of material susceptibility to surface activation in the pipeline of corrosion processes are conducted.Design/methodology/approach: In the corrosion research electrolyser, potentiostat „Solart...

  5. Crescimento da base craniana nos diferentes tipos faciais nos relacionamentos maxilomandibulares ortopédicos de Classe I, II e III: Parte 2 (Crescimento médio de Ba-Na, CC-Na e CC-Ba Cranial base growth in different facial types in Class I, II and III orthopedic maxillomandibular relationship: Part 2 (Mean growth of Ba-Na, CC-Na and CC-Ba

    Directory of Open Access Journals (Sweden)

    Lucelma Vilela Pieri

    2007-04-01

    Full Text Available OBJETIVO: este estudo retrospectivo avaliou o crescimento médio da base craniana nos diferentes tipos faciais e de relacionamentos maxilomandibulares ortopédicos.METODOLOGIA: uma amostra aleatória de 300 pacientes brasileiros leucodermas (131 do gênero masculino, 169 do gênero feminino, com idade média inicial de 10 anos e 2 meses (dentadura mista e final de 14 anos e 8 meses (segundos molares em oclusão e tempo médio de observação de 4 anos e 5 meses, foi selecionada em uma clínica particular, em São Paulo, Brasil. Havia 118 Classe I, 151 Classe II e 31 Classe III. Todas as 600 radiografias cefalométricas laterais foram obtidas no mesmo aparelho de raios-x. As análises de Ricketts e Schwarz modificadas por Faltin foram usadas. As medidas lineares (Ba-Na, CC-Na e CC-Ba foram feitas manualmente pelo mesmo examinador em T1 e T2. Os relacionamentos foram estudados juntos e separadamente, considerando tipo facial e gênero. O teste t-pareado e ANOVA foram aplicados. RESULTADOS E CONCLUSÕES: o tipo facial retrovertido cresceu significantemente mais em CC-Na na Classe II, sendo a sua correção desfavorável no gênero feminino; com tendência favorável na Classe III e crescimento dentro do esperado na Classe I. O neutrovertido cresceu significantemente mais em CC-Na nas Classes I e II, sendo desfavorável na Classe II; com crescimento eqüitativo de CC-Na e CC-Ba na Classe III e levemente acima do esperado na Classe I. O provertido teve crescimento eqüitativo em todas as Classes, sendo significantemente favorável na Classe II mandibular; com tendência favorável na Classe III e crescimento médio acima do esperado na Classe I.AIM: This retrospective study evaluated the cranial base mean growth in different facial types and orthopedic maxillomandibular relationship. METHODS: A random sample of 300 Brazilian Caucasian patients (131 males, 169 females, initial and final mean age (10 years 2 months-mixed dentition; 14 years 8 months

  6. Lane-Level Road Information Mining from Vehicle GPS Trajectories Based on Naïve Bayesian Classification

    Directory of Open Access Journals (Sweden)

    Luliang Tang

    2015-11-01

    Full Text Available In this paper, we propose a novel approach for mining lane-level road network information from low-precision vehicle GPS trajectories (MLIT, which includes the number and turn rules of traffic lanes based on naïve Bayesian classification. First, the proposed method (MLIT uses an adaptive density optimization method to remove outliers from the raw GPS trajectories based on their space-time distribution and density clustering. Second, MLIT acquires the number of lanes in two steps. The first step establishes a naïve Bayesian classifier according to the trace features of the road plane and road profiles and the real number of lanes, as found in the training samples. The second step confirms the number of lanes using test samples in reference to the naïve Bayesian classifier using the known trace features of test sample. Third, MLIT infers the turn rules of each lane through tracking GPS trajectories. Experiments were conducted using the GPS trajectories of taxis in Wuhan, China. Compared with human-interpreted results, the automatically generated lane-level road network information was demonstrated to be of higher quality in terms of displaying detailed road networks with the number of lanes and turn rules of each lane.

  7. Nucleation and crystallisation kinetics of a Na-fluorrichterite based glass by differential scanning calorimetry (DSC)

    OpenAIRE

    Pérez, Juan M.; Casasola, Raquel; Rincón López, Jesús María; Romero, Maximina

    2012-01-01

    The present paper shows the results of a nucleation and crystallisation study of a Na-fluorrichterite glass carried out by dynamic scanning calorimetry (DSC). The kinetic study was performed using different procedures (Kissinger, Matusita–Sakka and Kissinger–Akahira–Sunose (KAS) methods), and the Avrami parameter was determined from the Ozawa and Malek approximations and the Malek equation. The results have indicated the coexistence of surface and bulk crystallisation in the devitrification p...

  8. Piezoelectric Active Humidity Sensors Based on Lead-Free NaNbO₃ Piezoelectric Nanofibers.

    Science.gov (United States)

    Gu, Li; Zhou, Di; Cao, Jun Cheng

    2016-01-01

    The development of micro-/nano-scaled energy harvesters and the self-powered sensor system has attracted great attention due to the miniaturization and integration of the micro-device. In this work, lead-free NaNbO₃ piezoelectric nanofibers with a monoclinic perovskite structure were synthesized by the far-field electrospinning method. The flexible active humidity sensors were fabricated by transferring the nanofibers from silicon to a soft polymer substrate. The sensors exhibited outstanding piezoelectric energy-harvesting performance with output voltage up to 2 V during the vibration process. The output voltage generated by the NaNbO₃ sensors exhibited a negative correlation with the environmental humidity varying from 5% to 80%, where the peak-to-peak value of the output voltage generated by the sensors decreased from 0.40 to 0.07 V. The sensor also exhibited a short response time, good selectively against ethanol steam, and great temperature stability. The piezoelectric active humidity sensing property could be attributed to the increased leakage current in the NaNbO₃ nanofibers, which was generated due to proton hopping among the H₃O⁺ groups in the absorbed H₂O layers under the driving force of the piezoelectric potential. PMID:27338376

  9. Structure-based mechanism for Na(+)/melibiose symport by MelB.

    Science.gov (United States)

    Ethayathulla, Abdul S; Yousef, Mohammad S; Amin, Anowarul; Leblanc, Gérard; Kaback, H Ronald; Guan, Lan

    2014-01-01

    The bacterial melibiose permease (MelB) belongs to the glycoside-pentoside-hexuronide:cation symporter family, a part of the major facilitator superfamily (MFS). Structural information regarding glycoside-pentoside-hexuronide:cation symporter family transporters and other Na(+)-coupled permeases within MFS has been lacking, although a wealth of biochemical and biophysical data are available. Here we present the three-dimensional crystal structures of Salmonella typhimurium MelBSt in two conformations, representing an outward partially occluded and an outward inactive state of MelBSt. MelB adopts a typical MFS fold and contains a previously unidentified cation-binding motif. Three conserved acidic residues form a pyramidal-shaped cation-binding site for Na(+), Li(+) or H(+), which is in close proximity to the sugar-binding site. Both cosubstrate-binding sites are mainly contributed by the residues from the amino-terminal domain. These two structures and the functional data presented here provide mechanistic insights into Na(+)/melibiose symport. We also postulate a structural foundation for the conformational cycling necessary for transport catalysed by MFS permeases in general. PMID:24389923

  10. Piezoelectric Active Humidity Sensors Based on Lead-Free NaNbO3 Piezoelectric Nanofibers

    Directory of Open Access Journals (Sweden)

    Li Gu

    2016-06-01

    Full Text Available The development of micro-/nano-scaled energy harvesters and the self-powered sensor system has attracted great attention due to the miniaturization and integration of the micro-device. In this work, lead-free NaNbO3 piezoelectric nanofibers with a monoclinic perovskite structure were synthesized by the far-field electrospinning method. The flexible active humidity sensors were fabricated by transferring the nanofibers from silicon to a soft polymer substrate. The sensors exhibited outstanding piezoelectric energy-harvesting performance with output voltage up to 2 V during the vibration process. The output voltage generated by the NaNbO3 sensors exhibited a negative correlation with the environmental humidity varying from 5% to 80%, where the peak-to-peak value of the output voltage generated by the sensors decreased from 0.40 to 0.07 V. The sensor also exhibited a short response time, good selectively against ethanol steam, and great temperature stability. The piezoelectric active humidity sensing property could be attributed to the increased leakage current in the NaNbO3 nanofibers, which was generated due to proton hopping among the H3O+ groups in the absorbed H2O layers under the driving force of the piezoelectric potential.

  11. Selectivity of a Singly Permeating Ion in Nonselective NaK Channel: Combined QM and MD Based Investigations.

    Science.gov (United States)

    Sadhu, Biswajit; Sundararajan, Mahesh; Bandyopadhyay, Tusar

    2015-10-01

    Ion channels, such as potassium channels are known to discriminate ions to achieve remarkable selective transportation of K(+) over Na(+) through the membrane. The recently reported NaK ion channel, on the contrary, seems to be an exception, as it is observed to permeate most of the group IA alkali metal cations and hence is suggested to be nonselective in nature. However, does that correspond to a complete annihilation of selectivity inside the selectivity filter (SF) of the channel? What is the origin of such nonselectivity/selectivity, if any? The present computational study is an extensive multiscale modeling approach to find the probable answers to these intriguing questions. Here, we have used density functional theory (DFT) based calculations using a realistic truncated model of SF from the crystal structures of the NaK ion channel to evaluate the binding of various alkali metal ions (Na(+), K(+) and Cs(+)), free from "contamination" due to the absence any other "rivalry" cations, in its different binding sites. Among all of the possible binding sites, a vestibule is noticed to be nonselective and seen to act as a probable binding site only in the presence of multiple ions. Binding sites S3 and S4 are found to be selective for K(+) and Na(+), respectively. As an important observation, we find that calculations on oversimplified models using an isolated ion binding site may lead to an erroneous selectivity trend as it neglects the synergetics of consecutive binding sites on the final outcome. Energy decomposition analysis revealed ion-dipole electrostatics as the major contributing interaction in metal-bound binding sites. Our investigations find that although NaK is permeable to monovalent alkali metal ions, strongly "site specific" selectivity does exist at the three well-defined noncontiguous binding sites of the SF. Different important physicomechanical parameters (such as ligating environment, synergistic influence of binding sites, and topological

  12. Exigência de Lisina, com Base no Conceito de Proteína Ideal, para Suínos Machos Castrados de Dois Grupos Genéticos, na Fase de Crescimento

    OpenAIRE

    Gasparotto Luiz Fernando; Moreira Ivan; Furlan Antonio Cláudio; Martins Elias Nunes; Marcos Júnior Maurício

    2001-01-01

    Foi conduzido um experimento para determinar as exigências de lisina para suínos machos castrados, de dois diferentes grupos genéticos na fase de crescimento, com base no conceito de proteína ideal. Foram utilizados 16 suínos do grupo genético comum (GGC) e 16 suínos do grupo genético melhorado (GGM), distribuídos em um delineamento de blocos ao acaso, com quatro tratamentos, duas repetições e dois animais por baia. Os tratamentos consistiram de uma ração referência, à base de milho e farelo ...

  13. Corrosion resistance of FeAl intermetallic phase based alloy in water solution of NaCl

    Directory of Open Access Journals (Sweden)

    J. Cebulski

    2008-03-01

    Full Text Available Purpose: Recognizing of corrosion mechanisms in liquid mediums can lead to obtain corrosion-proof material e.g. by applying passivation phenomenon. In this paper attention was paid to determine the corrosion resistance of Fe40Al intermetallic phase based alloy in corrosive medium of liquid NaCl. Research of material susceptibility to surface activation in the pipeline of corrosion processes are conducted.Design/methodology/approach: In the corrosion research electrolyser, potentiostat „Solartron 1285” and computer with „CorrWare 2” software were used. Results of the research were worked out with „CorrView” software. The potentials values were determined in relation to normal hydrogen electrode (NEW. The recording of potential/density of current - time curve was conducted for 300 s. Polarization of samples were conducted in range of potential from 300 mV lower than stationary to Ecor + 1500 mV. Potential change rate amounted 10 mV/min every time.Findings: The results of research conducted in 3% NaCl solution, the best electrochemical corrosion resistance were showed by samples after annealing during 72 hours. It was confirmed by the lowest value of corrosion current density, low value of passive current density, pitting corrosion resistance much higher than in other samples.Practical implications: The last feature is the reason to conduct the research for this group of materials as corrosion resistance materials. Especially FeAl intermetallic phase based alloys are objects of research in Poland and all world during last years.Originality/value: The goal of this work was to determine the influence of passivation in water solutions of H2SO4 and HNO3 on corrosion resistance of Fe40Al intermetallic phase based alloy in 3% NaCl solutions.

  14. Research on micro-blog character analysis based on Naïve Bayes

    Science.gov (United States)

    Liu, Yun; Liu, Tong; Wang, Yanbo J.

    2015-07-01

    With the development of Information Technology, people have entered the era of Big Data, and the demand for intelligent information is more intense. How to make computer provide more personalized and efficient service for all walks of life, is something worth exploring. In this paper, we aim to predict user's character by analyzing the textual content of his/her micro-blog, which is the foundation of Personalized Service. Our study describes the method of creating a prediction model about user's character by using Bayesian algorithms. Experimental results show that the Naïve Bayes approach is a valid and promoted analytic method in micro-blog character analysis.

  15. A model of the high count rate performance of NaI(Tl)-based PET detectors

    International Nuclear Information System (INIS)

    A detailed model of the response of large-area NaI(Tl) detectors used in PET and their triggering and data acquisition electronics has been developed. This allows one to examine the limitations of the imaging system's performance due to degradation in the detector performance from light pile-up and deadtime from triggering and event processing. Comparisons of simulation results to measurements from the HEAD PENN-PET scanner have been performed to validate the Monte Carlo model. The model was then used to predict improvements in the high count rate performance of the HEAD PENN-PET scanner using different signal integration times, light response functions, and detectors

  16. Desenvolvimento de farinhas mistas extrusadas à base de farinha de milho, derivados de levedura e caseína

    OpenAIRE

    Alvim Izabela Dutra; Sgarbieri Valdemiro Carlos; Chang Yoon Kil

    2002-01-01

    O presente trabalho teve como principal objetivo o desenvolvimento de farinhas mistas extrusadas à base de farinha de milho, derivados de levedura (autolisado ou extrato) e caseína como ingredientes. Utilizou-se a extrusão como processo, sem a pretensão de otimizá-lo, mas buscando as condições que permitissem uma boa operacionalidade do extrusor e produtos extrusados com boas propriedades funcionais, boa aceitação e elevado valor nutritivo. As condições adotadas para o processo foram: aliment...

  17. Multicolor light emitters based on energy exchange between Tb and Eu ions co-doped into ultrasmall β-NaYF 4 nanocrystals

    KAUST Repository

    Podhorodecki, Artur P.

    2012-01-01

    Multicolor emission is reported from ultrasmall (<10 nm) β-NaYF4:Eu,Tb nanocrystals depending on the excitation wavelengths or emission detection delay time. Detailed optical investigations of three samples (NaYF4:Eu, NaYF4:Tb and NaYF4:Eu,Tb) obtained by a co-thermolysis method have been carried out. Photoluminescence, photoluminescence excitation and emission decay time obtained at different excitation wavelengths have been measured. Excitation mechanisms of Eu and Tb ions have been explained based on the experimental results and calculations using Judd-Ofelt theory. It has been shown that efficient energy transfer from Tb to Eu ions accounts for the efficient red emission of NaYF4:Tb,Eu nanocrystals. © The Royal Society of Chemistry 2012.

  18. Alloying effects of Cr and Re on the hot-corrosion of nickel-based single crystal superalloys coated with a Na sub 2 SO sub 4 -NaCl salt. Na sub 2 SO sub 4 -NaCl kongoen tofu shiken ni okeru nickel ki tankessho chogokin no koon fushoku ni oyobosu Cr oyobi Re no koka

    Energy Technology Data Exchange (ETDEWEB)

    Matsuki, K (Toyohashi Univ. of Technology, Aichi (Japan). Graduate School); Kawakami, M.; Murata, Y.; Morinaga, M.; Yukawa, N. (Toyohashi Univ. of Technology, Aichi (Japan)); Takayanagi, T. (The Government Industrial Research Inst. Nagoya, Nagoya (Japan))

    1992-05-01

    The corrosion of nickel-based superalloys is represented by hot-corrosion due to Na {sub 2}SO{sub 4}contained in the combustion ashes of jet engines in aircraft. Therefore, in this study, the experiments are executed with the alloy based upon Ni-10Cr-12Al-1.2Ti-2.7Ta-2.0W-0.7Mo(TUT101) alloy with increased content of Cr as 13 mol% and 16 mol%, coated with a Na{sub 2}SO{sub 4}-45 mol%NaCl salt under 1173K, and the effects of Cr on the hot-corrosion are investigated. Further, the experiments are also carried out with the alloys based on Ni-9/10Cr-12Al-2Ti-1.1/1.2Ta-3.8W-0/1Re as well as the said TUT101 alloy with eight varying stages of Re content in the range of 0 to 0.5 mol%, coated with the same mixture salt as mentioned above to observe the effects of Re to the hot-corrosion. 15 refs., 8 figs., 2 tabs.

  19. Processing and Properties of Porous (K,Na)NbO3-based Lead-free Piezoceramics

    Institute of Scientific and Technical Information of China (English)

    BABA Ryosuke; KARAKI Tomoaki; FUJII Tadashi

    2016-01-01

    Porous piezoceramics are of interest for applications such as low frequency hydrophones. Porous (K,Na,Li)NbO3-BaZrO3-(Bi,Na)TiO3 lead-free piezoceramics having vertical morphotropic phase boundary composition were fabricated by adding 30μm-diameter acrylic resins. The ceramic powders were synthesized by a conventional solid-state reaction method and then mixed with the resins. Volume ratios of ceramics to resin were 90:10, 80:20, 70:30, and 60:40. After burning out the resins and binder, the specimens were sintered at 1170–1190℃ for 5 h. The porous specimen with 30 vol% acrylic resin had longitudinal acoustic velocity of 4518 m/s, acoustic impedance of 16.44 Mkg/(m2·s), and hydrostatic figure of merit of 405×10-15 m2/N. The hydrostatic figure of merit was about 4 times of that of mono-lithic ceramics. Compared with monolithic ceramics, the porous specimen had a better transducer sensitivity for under-water applications.

  20. Direct Ink Writing of Three-Dimensional (K, NaNbO3-Based Piezoelectric Ceramics

    Directory of Open Access Journals (Sweden)

    Yayun Li

    2015-04-01

    Full Text Available A kind of piezoelectric ink was prepared with Li, Ta, Sb co-doped (K, NaNbO3 (KNN powders. Piezoelectric scaffolds with diameters at micrometer scale were constructed from this ink by using direct ink writing method. According to the micro-morphology and density test, the samples sintered at 1100 °C for 2 h have formed ceramics completely with a high relative density of 98%. X-ray diffraction (XRD test shows that the main phase of sintered samples is orthogonal (Na0.52K0.4425Li0.0375(Nb0.87Sb0.07Ta0.06O3. The piezoelectric constant d33 of 280 pC/N, dielectric constant ε of 1775, remanent polarization Pr of 18.8 μC/cm2 and coercive field Ec of 8.5 kV/cm prove that the sintered samples exhibit good electrical properties. The direct ink writing method allows one to design and rapidly fabricate piezoelectric structures in complex three-dimensional (3D shapes without the need for any dies or lithographic masks, which will simplify the process of material preparation and offer new ideas for the design and application of piezoelectric devices.

  1. Optimization of NaOH Molarity, LUSI Mud/Alkaline Activator, and Na2SiO3/NaOH Ratio to Produce Lightweight Aggregate-Based Geopolymer

    OpenAIRE

    Rafiza Abdul Razak; Mohd Mustafa Al Bakri Abdullah; Kamarudin Hussin; Khairul Nizar Ismail; Djwantoro Hardjito; Zarina Yahya

    2015-01-01

    This paper presents the mechanical function and characterization of an artificial lightweight geopolymer aggregate (ALGA) using LUSI (Sidoarjo mud) and alkaline activator as source materials. LUSI stands for LU-Lumpur and SI-Sidoarjo, meaning mud from Sidoarjo which erupted near the Banjarpanji-1 exploration well in Sidoarjo, East Java, Indonesia on 27 May 2006. The effect of NaOH molarity, LUSI mud/Alkaline activator (LM/AA) ratio, and Na2SiO3/NaOH ratio to the ALGA are investigated at a sin...

  2. Destabilized LiBH4-NaAlH4 Mixtures Doped with Titanium Based Catalysts

    DEFF Research Database (Denmark)

    Shi, Qing; Yu, Xuebin; Feidenhans'l, Robert;

    2008-01-01

    hydrogen release temperature compared to the undoped system and that of titanium doped LiAlH4 and NaAlH4 systems. Three dehydrogenation steps with a total of 3.5 wt% released hydrogen are observed for samples with a 2:3 molar ratio, when heated to similar to 210 degrees C under a constant heating ramp in a...... 1 bar helium atmosphere. A slow hydrogen release is also observed at room temperature in the freshly ball-milled powders due to decomposition of the formed LiAlH4. X-ray powder diffraction spectra shows that the first dehydrogenation step is completed after a couple of days at room temperature. Li...

  3. Europium fluoride based luminescent materials: From hydrogels to porous cryogels, and crystalline NaEuF{sub 4} and EuF{sub 3} micro/nanostructures

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Hongkang; Wang, Yu; Zhang, Jie [Department of Physics and Materials Science and Centre for Functional Photonics, City University of Hong Kong, Hong Kong Special Administrative Region (Hong Kong); Gaponik, Nikolai [Physical Chemistry/Electrochemistry TU Dresden, Bergstr. 66b, 01062 Dresden (Germany); Rogach, Andrey L., E-mail: andrey.rogach@cityu.edu.hk [Department of Physics and Materials Science and Centre for Functional Photonics, City University of Hong Kong, Hong Kong Special Administrative Region (Hong Kong)

    2014-01-15

    Highlights: • Europium fluoride based hydrogels and cryogels are reported. • Emission of Eu{sup 3+} ions is dependent on their existing states and the adopted fluorides (NaF or NH{sub 4}F). • The amorphous NaF- and NH{sub 4}F-mediated cryogels show the strongest emission intensity. -- Abstract: Europium fluoride based hydrogels, porous cryogels, and crystalline NaEuF{sub 4} and EuF{sub 3} nanostructures were prepared by wet chemical route at room temperature by using NaF or NH{sub 4}F as the reactants and gelation agents, in the absence of any other additives. The phase, morphology and thus resultant photoluminescence properties of luminescent products are demonstrated on the basis of the formation and evolution of europium fluoride complexes (EuF{sub 6}{sup 3−}). The characteristic emission of Eu{sup 3+} ions is strongly dependent on their existing states and also the adopted fluorides (both cations and anions of NaF or NH{sub 4}F). The amorphous NaF- and NH{sub 4}F-mediated cryogels with highly porous structure and uniform distribution of optically active Eu{sup 3+} ions show much (one or two order) stronger luminescence intensity than their corresponding hydrogels and crystalline NaEuF{sub 4} and EuF{sub 3} nanostructures.

  4. Investigation and optimisation of mobile NaI(Tl) and 3He-based neutron detectors for finding point sources

    International Nuclear Information System (INIS)

    Neutron radiation produces high-energy gamma radiation through (n,γ) reactions in matter. This can be used to detect neutron sources indirectly using gamma spectrometers. The sensitivity of a gamma spectrometer to neutrons can be amplified by surrounding it with polyvinyl chloride (PVC). The hydrogen in the PVC acts as a moderator and the chlorine emits prompt gammas when a neutron is captured. A 4.7-l 3He-based mobile neutron detector was compared to a 4-l NaI(Tl)-detector covered with PVC using this principle. Methods were also developed to optimise the measurement parameters of the systems. The detector systems were compared with regard to their ability to find 241AmBe, 252Cf and 238Pu–13C neutron sources. Results from stationary measurements were used to calculate optimal integration times as well as minimum detectable neutron emission rates. It was found that the 3He-based detector was more sensitive to 252Cf sources whereas the NaI(Tl) detector was more sensitive to 241AmBe and 238Pu–13C sources. The results also indicated that the sensitivity of the detectors to sources at known distances could theoretically be improved by 60% by changing from fixed integration times to list mode in mobile surveys

  5. Optimization of NaOH Molarity, LUSI Mud/Alkaline Activator, and Na2SiO3/NaOH Ratio to Produce Lightweight Aggregate-Based Geopolymer

    Directory of Open Access Journals (Sweden)

    Rafiza Abdul Razak

    2015-05-01

    Full Text Available This paper presents the mechanical function and characterization of an artificial lightweight geopolymer aggregate (ALGA using LUSI (Sidoarjo mud and alkaline activator as source materials. LUSI stands for LU-Lumpur and SI-Sidoarjo, meaning mud from Sidoarjo which erupted near the Banjarpanji-1 exploration well in Sidoarjo, East Java, Indonesia on 27 May 2006. The effect of NaOH molarity, LUSI mud/Alkaline activator (LM/AA ratio, and Na2SiO3/NaOH ratio to the ALGA are investigated at a sintering temperature of 950 °C. The results show that the optimum NaOH molarity found in this study is 12 M due to the highest strength (lowest AIV value of 15.79% with lower water absorption and specific gravity. The optimum LUSI mud/Alkaline activator (LM/AA ratio of 1.7 and the Na2SiO3/NaOH ratio of 0.4 gives the highest strength with AIV value of 15.42% with specific gravity of 1.10 g/cm3 and water absorption of 4.7%. The major synthesized crystalline phases were identified as sodalite, quartz and albite. Scanning Electron Microscope (SEM image showed more complete geopolymer matrix which contributes to highest strength of ALGA produced.

  6. Turn-on detection of a cancer marker based on near-infrared luminescence energy transfer from NaYF4:Yb,Tm/NaGdF4 core-shell upconverting nanoparticles to gold nanorods.

    Science.gov (United States)

    Chen, Hongqi; Guan, Yingying; Wang, Shaozhen; Ji, Yuan; Gong, Mengqi; Wang, Lun

    2014-11-01

    A homogeneous immunoassay for the sensitive and selective determination of trace amounts of α-fetoprotein (AFP, a cancer marker) by detection in the near-infrared (NIR) region based on luminescence energy transfer (LET) from NaYF4:Yb,Tm/NaGdF4 core-shell upconverting nanoparticles to gold nanorods (GNRs) is presented. The carboxyl-functionalized NaYF4:Yb,Tm/NaGdF4 core-shell upconverting nanoparticles (UCNPs) were excited by a 980 nm continuous wavelength laser, and its emission peak appeared at a near-infrared wavelength (∼804 nm). The carboxyl-functionalized upconverting nanoparticles were conjugated with the anti-AFP (Ab1) and acted as donor. GNRs with a high absorption band around 790 nm, which was overlapped the UCNPs emission, were synthesized and acted as the acceptor. The donor (negatively charged) interacted with the acceptor (positively charged) via electrostatic interactions to bring them into close proximity. LET could occur, producing a quenching phenomenon. When the AFP antigens were added into the system, the binding affinity between AFP and Ab1 was stronger than the electrostatic interactions, which released the energy acceptors from the energy donors, interrupting luminescence energy transfer, and therefore, the luminescence was recovered. On the basis of the restored luminescence, a turn-on optical immunosening system was developed. Under the optimal conditions, the linear range of detection was from 0.18 to 11.44 ng/mL for AFP (R = 0.99), with a detection limit as low as 0.16 ng/mL. The proposed method has also been used to monitor AFP in human serum samples. Therefore, further study based on the NaYF4:Yb,Tm/NaGdF4 core-shell nanoparticles-GNRs construction may open the way for a new class of NIR-LET biosensors with wide applications. PMID:25296290

  7. Direct evidence of an incommensurate phase in NaNbO3 and its implication in NaNbO3-based lead-free antiferroelectrics

    International Nuclear Information System (INIS)

    Hot-stage in situ transmission electron microscopy was employed to investigate the temperature-induced complex sequence of phase transitions in NaNbO3 polycrystalline. In addition to the commonly recognized P (Pbma) → R (Pmnm) → S (Pnmm) phase transitions, incommensurate phases were observed to exist in P and R phase regions. The former (in the P → R transition region) is coincident with a diffused dielectric peak appearing at ∼170 °C, and the latter (in the R → S transition region) serves as an intermediate structure to bridge the two sub-phases in the R phase region. The incommensurate phase in the P phase region can be inferred from the polarization current density and differential dielectric permittivity anomalies, and it provides the bridge structure during the electric field-induced polarization reversal and antiferroelectric-to-ferroelectric transition in NaNbO3 solid solutions

  8. Hot corrosion behaviour of Fe-Al based intermetallic in molten NaVO3 salt

    International Nuclear Information System (INIS)

    The hot corrosion of sprayed Fe-40 (at.%)Al intermetallic alloy with additions of boron and alumina whiskers in molten NaVO3 at 700 deg. C has been evaluated by potentiodynamic polarization curves and electrochemical impedance spectroscopy, EIS, techniques. For short exposure times, the corrosion mechanism under these conditions was observed to be controlled by an activation process, whereas for longer exposure times, the corrosion process was under diffusion control due to the growing of an Al2O3 oxide scale, which made the diffusion of both reducing and oxidizing species through the scale to the alloy or scale surfaces more difficult. Equivalent electric model used to simulate the EIS data showed that a finite length Warburg diffusion could properly characterize the diffusion process, which confirmed the formation of a compact corrosion product scales containing rich aluminium oxide. Thus, the corrosion process was under diffusion control of aggressive ions through the formed scale. The electrochemical study was complemented by scanning electronic microscopy characterization and micro chemical analysis.

  9. A mixed iron-manganese based pyrophosphate cathode, Na2Fe0.5Mn0.5P2O7, for rechargeable sodium ion batteries.

    Science.gov (United States)

    Shakoor, Rana A; Park, Chan Sun; Raja, Arsalan A; Shin, Jaeho; Kahraman, Ramazan

    2016-02-01

    The development of secondary batteries based on abundant and cheap elements is vital. Among various alternatives to conventional lithium-ion batteries, sodium-ion batteries (SIBs) are promising due to the abundant resources and low cost of sodium. While there are many challenges associated with the SIB system, cathode is an important factor in determining the electrochemical performance of this battery system. Accordingly, ongoing research in the field of SIBs is inclined towards the development of safe, cost effective cathode materials having improved performance. In particular, pyrophosphate cathodes have recently demonstrated decent electrochemical performance and thermal stability. Herein, we report the synthesis, electrochemical properties, and thermal behavior of a novel Na2Fe0.5Mn0.5P2O7 cathode for SIBs. The material was synthesized through a solid state process. The structural analysis reveals that the mixed substitution of manganese and iron has resulted in a triclinic crystal structure (P1[combining macron] space group). Galvanostatic charge/discharge measurements indicate that Na2Fe0.5Mn0.5P2O7 is electrochemically active with a reversible capacity of ∼80 mA h g(-1) at a C/20 rate with an average redox potential of 3.2 V. (vs. Na/Na(+)). It is noticed that 84% of initial capacity is preserved over 90 cycles showing promising cyclability. It is also noticed that the rate capability of Na2Fe0.5Mn0.5P2O7 is better than Na2MnP2O7. Ex situ and CV analyses indicate that Na2Fe0.5Mn0.5P2O7 undergoes a single phase reaction rather than a biphasic reaction due to different Na coordination environment and different Na site occupancy when compared to other pyrophosphate materials (Na2FeP2O7 and Na2MnP2O7). Thermogravimetric analysis (25-550 °C) confirms good thermal stability of Na2Fe0.5Mn0.5P2O7 with only 2% weight loss. Owing to promising electrochemical properties and decent thermal stability, Na2Fe0.5Mn0.5P2O7, can be an attractive cathode for SIBs. PMID

  10. A climate network-based index to discriminate different types of El Ni\\~no and La Ni\\~na

    CERN Document Server

    Wiedermann, Marc; Donges, Jonathan F; Kurths, Jürgen; Donner, Reik V

    2016-01-01

    El Ni\\~no exhibits distinct Eastern Pacific (EP) and Central Pacific (CP) types which are commonly, but not always consistently, distinguished from each other by different signatures in equatorial climate variability. Here, we propose an index based on evolving climate networks to objectively discriminate between both flavors by utilizing a scalar-valued evolving climate network measure that quantifies spatial localization and dispersion in El Ni\\~no's associated teleconnections. Our index displays a sharp peak (high localization) during EP events, whereas during CP events (larger dispersion) it remains close to the baseline observed during normal periods. In contrast to previous classification schemes, our approach specifically account for El Ni\\~no's global impacts. We confirm recent El Ni\\~no classifications for the years 1951 to 2014 and assign types to those cases were former works yielded ambiguous results. Ultimately, we study La Ni\\~na episodes and demonstrate that our index provides a similar discrim...

  11. Detection & Classification of Internet Intrusion Based on the Combination of Random Forest and Naïve Bayes

    Directory of Open Access Journals (Sweden)

    Younes Chihab

    2013-06-01

    Full Text Available The Use of internet renders a network packets susceptible to attacks ranging from passive eavesdropping to active impersonation, message replay and message distortion. There is no clear description as to what packets can be considered normal or abnormal. If the intrusions are not detected at the appropriate level, the loss of system may sometimes be unimaginable. Although many intrusion detection system (IDS methods are used to detect the existing types of attacks within the network infrastructures, reducing false negative and false positive is still a major issue. In this work we present a comparative study between five data mining algorithms to come up finally with the proposition of a hybrid classifier based on Random Forest and Naïve Bayes algorithm. This method provides an effectivedistinction between different types of intrusions which allows us to customize the treatment given to each type of intrusion. These methods are tested using the KDD'99 database.

  12. The Influence of Na2O on the Solidification and Crystallization Behavior of CaO-SiO2-Al2O3-Based Mold Flux

    Science.gov (United States)

    Gao, Jinxing; Wen, Guanghua; Sun, Qihao; Tang, Ping; Liu, Qiang

    2015-08-01

    The reaction between [Al] and SiO2 sharply increased the Al2O3 and decreased SiO2 contents in mold flux during the continuous casting of high-Al steels. These changes converted original CaO-SiO2-based flux into CaO-SiO2-Al2O3-based flux, promoting the crystallization and deteriorating the mold lubrication. Therefore, study on the solidification and crystallization behavior of CaO-SiO2-Al2O3-based mold flux, with the applicable fluidizers, is of importance. The effect of Na2O, predominantly used as the fluidizer in mold flux, on the solidification and crystallization behavior of CaO-SiO2-Al2O3-based mold flux needs to be investigated. In this study, a CaO-SiO2-Al2O3-based mold flux containing 6.5 wt pct Li2O was designed; the effect of Na2O on the solidification and crystallization behavior of these mold fluxes was investigated using the single hot thermocouple technique (SHTT) and the double hot thermocouple technique (DHTT). Moreover, the slag film obtained by a heat flux simulator was analyzed using X-ray diffraction (XRD). The results indicate that the solid fraction of molten slag (Fs) and the crystalline fraction of solid slag (Fc) in the mold slag films decrease with increasing Na2O content from 0 to 2 wt pct. However, Fs and Fc increased when the Na2O content increased from 2 to 6 wt pct. The critical cooling rates initially decreases and then increases with increasing Na2O content. The XRD analysis results show that LiAlO2 and CaF2 were the basic crystals for all the mold fluxes. Increasing the Na2O content both inhibits the Ca2Al2SiO7 formation and promotes the production of Ca12Al14O33, indicating that the mold lubrication deteriorated because of the high melting-point phase formation of Ca2Al2SiO7 in the CaO-SiO2-Al2O3-based mold flux containing 6.5 wt pct Li2O, without Na2O. The strong crystallization tendency also deteriorated the mold lubrication for the mold flux with a higher Na2O content. Therefore, the addition of Na2O was less than 2 wt pct in

  13. Controle ácido-básico na hipotermia The acid-base management in hypothermia

    Directory of Open Access Journals (Sweden)

    Walter José Gomes

    1993-09-01

    Full Text Available O emprego da hipotermia profunda tem se constituído, atualmente, numa Importante estratégia para melhoria da qualidade técnica e resultados em cirurgia cardiovascular. A hipotermia reduz os danos teciduais induzidos pela isquemia por diminuir o metabolismo e preservar os fosfatos energéticos. A regulação do pH tecidual durante a hipotermia é fundamental para a manutenção da homeostasia celular, já que a hipotermia induz alterações desse pH pela mudança provocada na constante de dissociação da água. A questão do melhor manuseio dos gases sangüíneos durante a hipotermia induzida tem sido objeto de controvérsia. Duas abordagens têm sido preconizadas para o manejo das alterações iónicas durante a hipotermia. A regulção pH-stat envolve a manutenção do pH constante de 7,40 em todas as temperaturas com ajustes da PaCO2 e a regulação α-stat permite a variação do pH sangüíneo, que aumenta conforme a diminuição da temperatura e o conteúdo total corpóreo de CO2 é mantido constante. Nesta presente revisão a relação entre pH sangüíneo e intracelular e as alterações iónicas induzidas pela hipotermia são discutidas.Deep hypothermia is a usefull tool to improve technical results in cardiovascular surgery and is nowadays the major strategy used to reduce ischemic injury. Hypothermia reduces metabolism and preserves cellular stores of high-energy phosphates. The regulation of tissue pH during hypothermia is important for cellular homeostasis. Furthermore, hypothermia has important effects on pH by altering the dissociation constant of water and various metabolics intermediates and the question of optimal blood gas management during deliberate hypothermia has been subject of much controversy. Two approaches have been advocated for pH management during hypothermia, the first termed pH strategy, where blood pH is maintained constant at 7,40 at all temperatures with PaCO2 adjustment, and in the second type of

  14. The design of durable Na+-selective CHEMFETs based on polysiloxane membranes

    NARCIS (Netherlands)

    Brunink, Jos A.J.; Lugtenberg, Ronny J.W.; Brzozka, Zbigniew; Engbersen, Johan F.J.; Reinhoudt, David N.

    1994-01-01

    The design of durable sodium-selective CHEMFETs based on the covalent attachment of a sodium-selective ionophore and tetraphenylborate anions to a polysiloxane membrane matrix is described. Simulations of the membrane potential of such CHEMFETs using an extended version of the model developed previo

  15. A simulation-based study of the neutron backgrounds for NaI dark matter experiments

    Science.gov (United States)

    Jeon, E. J.; Kim, Y. D.

    2016-01-01

    Among the direct search experiments for weakly interacting massive particle (WIMP) dark matter, the DAMA experiment observed an annual modulation signal interpreted as WIMP interactions with a significance of 9.2σ. Recently, Jonathan Davis claimed that the DAMA modulation may be interpreted on the basis of the neutron scattering events induced by the muons and neutrinos together. We tried to simulate the neutron backgrounds at the Gran Sasso and Yangyang laboratory with and without the polyethylene shielding to quantify the effects of the ambient neutrons on the direct detection experiments based on the crystals.

  16. Latest research results on the effects of nanomaterials on humans and the environment: DaNa - Knowledge Base Nanomaterials

    Science.gov (United States)

    Marquardt, C.; Kühnel, D.; Richter, V.; Krug, H. F.; Mathes, B.; Steinbach, C.; Nau, K.

    2013-04-01

    Nanotechnology is considered one of the key technologies of the 21st century. The success of this fascinating technology is based on its versatility. It will bring about fundamental changes of basic research as well as of many sectors of industry and also of daily life from electronics to the health care system. However, consumers often miss reliable and understandable information on nanomaterials and all aspects of this versatile technology. A huge body of data on the potential hazards of nanoobjects towards human and environmental health already exists, but is either not easily accessible for a broad audience or presented unprocessable for nonexperts. But risk communication is an essential and thus integral component of risk management. For that purpose, the DaNa-Project aims at filling this gap by collecting and evaluating scientific results in an interdisciplinary approach with scientists from different research areas, such as human and environmental toxicology, biology, physics, chemistry, and sociology. Research findings from the field of human and environmental nanotoxicology are being prepared and presented together with material properties and possible applications for interested laymen and stakeholders. For the evaluation of literature a "Literature Criteria Checklist" has been developed as well as a Standard Operation Procedure template (SOP) based on careful scientific practice.

  17. Latest research results on the effects of nanomaterials on humans and the environment: DaNa – Knowledge Base Nanomaterials

    International Nuclear Information System (INIS)

    Nanotechnology is considered one of the key technologies of the 21st century. The success of this fascinating technology is based on its versatility. It will bring about fundamental changes of basic research as well as of many sectors of industry and also of daily life from electronics to the health care system. However, consumers often miss reliable and understandable information on nanomaterials and all aspects of this versatile technology. A huge body of data on the potential hazards of nanoobjects towards human and environmental health already exists, but is either not easily accessible for a broad audience or presented unprocessable for nonexperts. But risk communication is an essential and thus integral component of risk management. For that purpose, the DaNa-Project aims at filling this gap by collecting and evaluating scientific results in an interdisciplinary approach with scientists from different research areas, such as human and environmental toxicology, biology, physics, chemistry, and sociology. Research findings from the field of human and environmental nanotoxicology are being prepared and presented together with material properties and possible applications for interested laymen and stakeholders. For the evaluation of literature a 'Literature Criteria Checklist' has been developed as well as a Standard Operation Procedure template (SOP) based on careful scientific practice.

  18. A Naïve Based approach of Model Pruned trees on Learner’s Response

    Directory of Open Access Journals (Sweden)

    S.Anupama Kumar

    2012-09-01

    Full Text Available Appraisal and feedback have a strong positive influence on teachers and their work. Teachers report that it increases their job satisfaction and, to some degree, their job security, and it significantly increases their development as teachers. Student’s appraisal towards a teacher plays a vital role in building a very good teaching-learning environment in an educational institution. The evaluation report of the student helps the stakeholders to retain qualified teachers for the course. It will also help the teacher to understand the need of the student and the course. Therefore it becomes necessary to evaluate the teacher using appropriate tool to improve the quality of the education. Teacher evaluation can be measured based on the technical knowledge, communication skills, clarity, attitude towards the student etc. Regression trees can be considered as a tool to analyze the teacher appraisal scores. Two regression trees namely the REP tree and M5P algorithms are applied on the data set to bring out new knowledge from it. The algorithms have identified Parameter A as an important factor in teacher’s appraisal. Pruning has been taken as parameter to find the accuracy of the algorithm. The performance of the algorithm is measured using the mean absolute error and the time taken by the algorithms to derive the regression tree. The REP tree algorithm performs better than the M5P algorithm in terms of accuracy as well as the performance.

  19. R2NA: Received Signal Strength (RSS Ratio-Based Node Authentication for Body Area Network

    Directory of Open Access Journals (Sweden)

    Yang Wu

    2013-12-01

    Full Text Available The body area network (BAN is an emerging branch of wireless sensor networks for personalized applications. The services in BAN usually have a high requirement on security, especially for the medical diagnosis. One of the fundamental directions to ensure security in BAN is how to provide node authentication. Traditional research using cryptography relies on prior secrets shared among nodes, which leads to high resource cost. In addition, most existing non-cryptographic solutions exploit out-of-band (OOB channels, but they need the help of additional hardware support or significant modifications to the system software. To avoid the above problems, this paper presents a proximity-based node authentication scheme, which only uses wireless modules equipped on sensors. With only one sensor and one control unit (CU in BAN, we could detect a unique physical layer characteristic, namely, the difference between the received signal strength (RSS measured on different devices in BAN. Through the above-mentioned particular difference, we can tell whether the sender is close enough to be legitimate. We validate our scheme through both theoretical analysis and experiments, which are conducted on the real Shimmer nodes. The results demonstrate that our proposed scheme has a good security performance.

  20. Replicando um Programa de Transferência Condicionada de Renda: Reflexões com Base na Experiência do Programa Oportunidades

    OpenAIRE

    Iliana Yaschine

    2013-01-01

    One Pager No. 176 ? Replicando um Programa de Transferência Condicionada de Renda: Reflexões com Base na Experiência do Programa Oportunidades por Iliana Yaschine, Universidade Nacional Autônoma do México (UNAM) Durante a primeira década do Século 21, com o apoio de uma série de organizações internacionais, os Programas de Transferência Condicionada de Renda (PTCs) tornaram-se alguns dos instrumentos de política social mais amplamente utilizados no combate à pobreza na América Latina, África ...

  1. A high-resolution TDC-based board for a fully digital trigger and data acquisition system in the NA62 experiment at CERN

    CERN Document Server

    Pedreschi, Elena; Avanzini, Carlo; Galeotti, Stefano; Lamanna, Gianluca; Magazzu, Guido; Pinzino, Jacopo; Piandani, Roberto; Sozzi, Marco; Spinella, Franco; Venditti, Stefano

    2014-01-01

    A Time to Digital Converter (TDC) based system, to be used for most sub-detectors in the high-flux rare-decay experiment NA62 at CERN SPS, was built as part of the NA62 fully digital Trigger and Data AcQuisition system (TDAQ), in which the TDC Board (TDCB) and a general-purpose motherboard (TEL62) will play a fundamental role. While TDCBs, housing four High Performance Time to Digital Converters (HPTDC), measure hit times from sub-detectors, the motherboard processes and stores them in a buffer, produces trigger primitives from different detectors and extracts only data related to the lowest trigger level decision, once this is taken on the basis of the trigger primitives themselves. The features of the TDCB board developed by the Pisa NA62 group are extensively discussed and performance data is presented in order to show its compliance with the experiment requirements.

  2. Diets based on soybean protein for Mediterranean fruit fly Dietas baseadas em proteína de soja para moscas do Mediterrâneo

    Directory of Open Access Journals (Sweden)

    Raimundo Braga Sobrinho

    2006-04-01

    Full Text Available The objective of this work was to develop suitable and economic diets for mass rearing Mediterranean fruit fly, Ceratitis capitata (Diptera: Tephritidae. Diets containing sugar beet bagase, wheat bran, brewer yeast, and others with wheat bran and palletized soybean protein from Brazil were tested. Diets based on soybean protein have shown promising results regarding pupal recovery, pupal weight and adult emergence. Soybean bagase in the form of pellets with 60% of protein can be a very important substitute for other expensive sources of protein.O objetivo deste trabalho foi desenvolver dietas adequadas e econômicas para a criação massal de moscas de frutas do Mediterrâneo, Ceratitis capitata (Diptera: Tephritidae. Foram testados dietas com bagaço de beterraba açucareira, farelo de trigo, levedura de cerveja e outras dietas de farelo de trigo e proteína de soja prensada brasileira. Dietas compostas por proteína de soja apresentaram resultados positivos de recuperação de pupas, pesos de pupa e emergência de adultos. O bagaço de soja, na forma de pellet com 60% de proteína, pode ser um importante substituto de outras fontes de proteína.

  3. Domain configuration changes under electric field-induced antiferroelectric-ferroelectric phase transitions in NaNbO3-based ceramics

    International Nuclear Information System (INIS)

    We recently developed a feasible crystal chemistry strategy to stabilize the antiferroelectricity in NaNbO3 through a chemical substitution to decrease the tolerance factor and increase the average electronegativity of the system [Shimizu et al., Dalton Trans. 44, 10763 (2015) and Guo et al., J. Appl. Phys. 117, 214103 (2015)]. Two novel lead-free antiferroelectric (AFE) solid solutions, (1-x)NaNbO3-xCaZrO3 and (1-x)NaNbO3-xSrZrO3, have been found to exhibit the double polarization hysteresis typical of a reversible AFE ↔ ferroelectric (FE) phase transition. In this study, as demonstrated by (1-x)NaNbO3-xCaZrO3 system, the influence of chemical modification and electrical poling on the AFE/FE phase stability was investigated, primarily focusing on the microstructural and crystallographic evolutions. Together with the macroscopic polarization hysteresis measurements, a well-demonstrated structure-property relationship was presented. It was found that the CaZrO3 substitution into NaNbO3 can effectively destabilize the FE Q phase and correspondingly lead to a spontaneous reverting to AFE P phase. In contrast to the reversible AFE ↔ FE phase transition, the domain morphology evolution exhibits irreversible nature with a growing process of the orientational domains after applying electric field. Moreover, a multiple-zone axes electron diffraction map of P and Q phases has been summarized and is believed to be an efficient diagram to determine the AFE/FE nature of the NaNbO3-based systems

  4. Exigência de Lisina, com Base no Conceito de Proteína Ideal, para Suínos Machos Castrados de Dois Grupos Genéticos, na Fase de Crescimento Lysine Requirement Based on Ideal Protein Concept, for Growing Barrows from Two Genetic Groups

    OpenAIRE

    Luiz Fernando Gasparotto; Ivan Moreira; Antonio Cláudio Furlan; Elias Nunes Martins; Maurício Marcos Júnior

    2001-01-01

    Foi conduzido um experimento para determinar as exigências de lisina para suínos machos castrados, de dois diferentes grupos genéticos na fase de crescimento, com base no conceito de proteína ideal. Foram utilizados 16 suínos do grupo genético comum (GGC) e 16 suínos do grupo genético melhorado (GGM), distribuídos em um delineamento de blocos ao acaso, com quatro tratamentos, duas repetições e dois animais por baia. Os tratamentos consistiram de uma ração referência, à base de milho e farelo ...

  5. Quantum and Classical Molecular Dynamics of Ionic Liquid Electrolytes for Na/Li-based Batteries: Molecular Origins of the Conductivity Behavior.

    Science.gov (United States)

    Vicent-Luna, Jose Manuel; Ortiz-Roldan, Jose Manuel; Hamad, Said; Tena-Zaera, Ramon; Calero, Sofia; Anta, Juan Antonio

    2016-08-18

    Compositional effects on the charge-transport properties of electrolytes for batteries based on room-temperature ionic liquids (RTILs) are well-known. However, further understanding is required about the molecular origins of these effects, in particular regarding the replacement of Li by Na. In this work, we investigate the use of RTILs in batteries, by means of both classical molecular dynamics (MD), which provides information about structure and molecular transport, and ab initio molecular dynamics (AIMD), which provides information about structure. The focus has been placed on the effect of adding either Na(+) or Li(+) to 1-methyl-1-butyl-pyrrolidinium [C4 PYR](+) bis(trifluoromethanesulfonyl)imide [Tf2 N](-) . Radial distribution functions show excellent agreement between MD and AIMD, which ensures the validity of the force fields used in the MD. This is corroborated by the MD results for the density, the diffusion coefficients, and the total conductivity of the electrolytes, which reproduce remarkably well the experimental observations for all studied Na/Li concentrations. By extracting partial conductivities, it is demonstrated that the main contribution to the conductivity is that of [C4 PYR](+) and [Tf2 N](-) . However, addition of Na(+) /Li(+) , although not significant on its own, produces a dramatic decrease in the partial conductivities of the RTIL ions. The origin of this indirect effect can be traced to the modification of the microscopic structure of the liquid as observed from the radial distribution functions, owing to the formation of [Na(Tf2 N)n ]((n-1)-) and [Li(Tf2 N)n ]((n-1)-) clusters at high concentrations. This formation hinders the motion of the large ions, hence reducing the total conductivity. We demonstrate that this clustering effect is common to both Li and Na, showing that both ions behave in a similar manner at a microscopic level in spite of their distinct ionic radii. This is an interesting finding for extending Li-ion and Li

  6. Exigência de Lisina para Machos Castrados de Dois Grupos Genéticos de Suínos na Fase de Terminação, com Base no Conceito de Proteína Ideal

    OpenAIRE

    Moreira Ivan; Gasparotto Luiz Fernando; Furlan Antônio Cláudio; Patrício Valquíria Mayumi Ishida; Oliveira Gisele Cristina de

    2002-01-01

    Foi conduzido um experimento para determinar as exigências de lisina de machos castrados, em fase de terminação, de dois grupos genéticos de suínos, com base no conceito de proteína ideal. Foram utilizados 16 suínos do grupo genético comum (GGC) e 16 suínos do grupo genético melhorado (GGM), distribuídos em quatro tratamentos que consistiram de uma ração basal, à base de milho e farelo de soja, contendo 0,60% de lisina e outras três rações, acrescentando-se níveis crescentes de lisina para se...

  7. Comparison of efavirenz and protease inhibitor based combination antiretroviral therapy regimens in treatment-naïve people living with HIV with baseline resistance.

    Science.gov (United States)

    Lim, Charlotte; McFaul, Katie; Kabagambe, Samuel; Sonecha, Sonali; Jones, Rachael; Asboe, David; Pozniak, Anton; Nwokolo, Nneka; Boffito, Marta

    2016-07-17

    A retrospective cohort analysis comparing the efficacy of boosted protease inhibitor-based and efavirenz-based combination antiretroviral therapy in treatment-naïve people living with HIV with baseline resistance found that efavirenz-based treatment led to a shorter mean time to undetectable viral load. A higher proportion of patients with nonnucleoside reverse transcriptase inhibitor related baseline resistance mutations in the efavirenz-treatment group achieved an undetectable viral load at both 6 and 12 months post-treatment initiation, compared with the boosted protease-inhibitor-treatment group.Supplementary content: http://links.lww.com/QAD/A930. PMID:27139315

  8. Surface-Based Regional Homogeneity in First-Episode, Drug-Naïve Major Depression: A Resting-State fMRI Study

    Directory of Open Access Journals (Sweden)

    Hui-Jie Li

    2014-01-01

    Full Text Available Background. Previous volume-based regional homogeneity (ReHo studies neglected the intersubject variability in cortical folding patterns. Recently, surface-based ReHo was developed to reduce the intersubject variability and to increase statistical power. The present study used this novel surface-based ReHo approach to explore the brain functional activity differences between first-episode, drug-naïve MDD patients and healthy controls. Methods. Thirty-three first-episode, drug-naïve MDD patients and 32 healthy controls participated in structural and resting-state fMRI scans. MDD patients were rated with a 17-item Hamilton Rating Scale for Depression prior to the scan. Results. In comparison with the healthy controls, MDD patients showed reduced surface-based ReHo in the left insula. There was no increase in surface-based ReHo in MDD patients. The surface-based ReHo value in the left insula was not significantly correlated with the clinical information or the depressive scores in the MDD group. Conclusions. The decreased surface-based ReHo in the left insula in MDD may lead to the abnormal top-down cortical-limbic regulation of emotional and cognitive information. The surface-based ReHo may be a useful index to explore the pathophysiological mechanism of MDD.

  9. GESTÃO DE RISCOS: ANÁLISE DA EVIDENCIAÇÃO DE RISCOS NAS CONCESSIONÁRIAS DE RODOVIAS LISTADAS NA BOVESPA COM BASE NA METODOLOGIA COSO

    Directory of Open Access Journals (Sweden)

    Cristian Baú Dal Magro

    2016-05-01

    Full Text Available As concessionárias de rodovias assinam contratos de concessão com o setor público e investem em infraestrutura que, ao término do contrato, retorna ao poder público. Assim, as empresas do setor ficam expostas a riscos que devem ser identificados e evidenciados. Desta forma, o objetivo do estudo é identificar os riscos divulgados e analisar o conteúdo de evidenciação da gestão de riscos nas concessionárias de rodovias listadas na Bovespa com base na metodologia COSO. A pesquisa se classifica como descritiva, análise documental e com abordagem qualitativa. A amostra da pesquisa é composta pelas16 empresas listadas no segmento de exploração de rodovias da Bovespa. Os resultados indicam que os riscos mais evidenciados pelas empresas do segmento de exploração de rodovias são os relacionados ao mercado. Conclui-se que os riscos divulgados pelas empresas seguem uma uniformidade (isomorfismo mimético no que se refere à evidenciação e ao conteúdo.

  10. Fuel element rupture detection based on NaI detector and multi-channel pulse amplitude analyzer

    International Nuclear Information System (INIS)

    Two methods of fuel element rupture detection are introduced in this paper. By analyzing their limitations, the authors put forward a new method by detecting the characteristic nuclides of 131I and 137Cs with NaI detector and multi-channel pulse amplitude analyzer. It can reduce and eliminate the affecting factors, enhance the efficiency and precision of detecting. (authors)

  11. Luminescence resonance energy transfer based on β-NaYF_4:Yb,Er nanoparticles and TRITC dye

    Institute of Scientific and Technical Information of China (English)

    SUN LingDong; GU JianQin; ZHANG ShuZhuo; ZHANG YaWen; YAN ChunHua

    2009-01-01

    β-NaYF_4:Yb,Er nanoparticles (NPs) are one of the most efficient upconversion materials, which can convert near-infrared light to higher-energy light through multiple photon absorptions or energy transfer. In addition, they may be attractive alternative donors for luminescence resonance energy transfer (LRET) studies, because of their sharp absorption and emission profiles, high quantum yields, large anti-stokes shifts, long lifetime, low toxicity, and superior photo-stability. In principle, many problems of fluorescence resonance energy transfer (FRET), such as excitation of acceptors, emission overlaps between donors and acceptors, high background noise, potential toxicity, and instability, can be overcome using β-NaYF_4:Yb,Er NPs as energy donors. Because the organic coating induced separation can significantly reduce the energy transfer efficiency and aqueous FRET system is difficult to be applied in devices, we demonstrate a novel NP-dye LRET system in solid state. The emission of the β-NaYF_4:Yb,Er NPs at 539 nm overlaps with the absorption of the tetrametrylrhodarnine isothiocyante (TRITC), satisfying the requirement of LRET process. Since TRITC molecules are adsorbed on the β-NaYF_4:Yb,Er NPs by an electrostatic interaction, the interaction distance is suitable for LRET without any further modulation. The resultant solid LRET system is ready for the further applications for devices.

  12. Luminescence resonance energy transfer based on β-NaYF4:Yb,Er nanoparticles and TRITC dye

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    β-NaYF4:Yb,Er nanoparticles (NPs) are one of the most efficient upconversion materials, which can convert near-infrared light to higher-energy light through multiple photon absorptions or energy transfer. In addition, they may be attractive alternative donors for luminescence resonance energy transfer (LRET) studies, because of their sharp absorption and emission profiles, high quantum yields, large anti-stokes shifts, long lifetime, low toxicity, and superior photo-stability. In principle, many problems of fluorescence resonance energy transfer (FRET), such as excitation of acceptors, emission overlaps between donors and acceptors, high background noise, potential toxicity, and instability, can be overcome using β-NaYF4:Yb,Er NPs as energy donors. Because the organic coating induced separation can significantly reduce the energy transfer efficiency and aqueous FRET system is difficult to be applied in devices, we demonstrate a novel NP-dye LRET system in solid state. The emission of the β-NaYF4:Yb,Er NPs at 539 nm overlaps with the absorption of the tetrametrylrhodarnine isothiocyante (TRITC), satisfying the requirement of LRET process. Since TRITC molecules are adsorbed on the β-NaYF4:Yb,Er NPs by an electrostatic interaction, the interaction distance is suitable for LRET without any further modulation. The resultant solid LRET system is ready for the further applications for devices.

  13. Identifying unstable taxa: Efficient implementation of triplet-based measures of stability, and comparison with Phyutility and RogueNaRok.

    Science.gov (United States)

    Goloboff, Pablo A; Szumik, Claudia A

    2015-07-01

    This paper describes an efficient implementation of triplet-based measures of stability, in the program TNT. The only available implementations of such measures are much slower than the present one, either because of an inefficient implementation (Phyutility, Thor) or because the stability is evaluated with quartets (RogueNaRok, requiring O(t(4)), instead of the O(t(3)) possible for triplets). The method to quickly calculate triplets is applied to solving IterPCR (Pol and Escapa, 2009). It is shown that, in some cases, IterPCR or other algorithms in the program TNT (e.g. commands prunnelsen, prunmajor, or chkmoves) produce more informative results than analysis with RogueNaRok. PMID:25865266

  14. Visual and microplate detection of aflatoxin B2 based on NaCl-induced aggregation of aptamer-modified gold nanoparticles

    International Nuclear Information System (INIS)

    We describe a fast and sensitive method for the detection of aflatoxin B2 (AFB2) that is based on the addition of AFB2-sensitive aptamers to a colloidal solution of gold nanoparticles (AuNPs). Subsequent addition of AFB2 and NaCl to the solution causes a color change from wine-red to blue-purple. Best results are obtained at a pH value of 7.0, a 10 mM aptamer concentration, and a 2 M concentration of NaCl. The method has a linear dynamic range that extends from 0.025 to 10 ng∙mL−1 of AFB2, and the detection limit is 25 pg∙mL−1. The method is simple, fast, highly sensitive, and enables both visual and microplate readout. (author)

  15. Algoritmo de classificação de especialistas em áreas na base de currículos Lattes

    Directory of Open Access Journals (Sweden)

    Fellipe de Melo Chagas

    2015-08-01

    Full Text Available Este trabalho propõe um algoritmo para construir um ranking de especialistas na base de currículos Lattes. Para isto, foi elaborado um algoritmo composto por três estágios de processamento: Score Alfa, que analisa os títulos dos documentos baseado na ontologia definida para selecionar os assuntos e importâncias destes assuntos para cada publicação; Score Beta, que analisa a qualidade das publicações utilizando conceitos definidos pela CAPES para beneficiar produções publicadas em veículos mais importantes; e Score Propagated, que analisa a importância de estar bem conectado a demais pesquisadores especialistas propagando o conhecimento obtido. Para o teste de precisão do algoritmo, utilizaram-se dados reais da área de Nanotecnologia.

  16. Caroço de algodão em dietas à base de palma forrageira para vacas leiteiras: síntese de proteína microbiana Whole cottonseed in forage cactus based diets: synthesis of microbial protein

    Directory of Open Access Journals (Sweden)

    Airon Aparecido Silva de Melo

    2007-08-01

    Full Text Available Objetivou-se avaliar o efeito da inclusão de caroço de algodão em substituição parcial à silagem de sorgo e ao farelo de soja em dietas à base de palma forrageira sobre a produção de proteína microbiana, a eficiência de síntese de proteína microbiana e as concentrações de uréia na urina e de uréia e N-uréia no plasma e no leite de vacas holandesas em lactação. Foram utilizados cinco animais aos 50 dias de lactação, distribuídos em quadrado latino 5 × 5. Os tratamentos consistiram de cinco níveis (0,0; 6,25; 12,50; 18,75 e 25,00% de inclusão de caroço de algodão na MS da dieta. A inclusão de caroço de algodão na dieta não influenciou a síntese de nitrogênio ou proteína microbiana, cujos valores médios foram 295,08 e 1.844,27 g/dia, respectivamente. As eficiências de síntese de nitrogênio e proteína microbiana diminuíram linearmente, em proporções de 0,30 e 1,43 g para cada 1% de caroço de algodão na dieta, respectivamente. Os níveis de uréia na urina e de uréia e N-uréia no plasma e no leite não foram afetados pela inclusão de caroço de algodão na dieta. Portanto, em dietas à base de palma forrageira, a inclusão de caroço de algodão em níveis de até 25% da MS não interfere na síntese de proteína microbiana e nas concentrações de uréia.The objective of this trial was to investigate the effects of partial replacement of sorghum silage and soybean meal with whole cottonseed on microbial protein synthesis and efficiency and nitrogen metabolism in lactating Holstein cows receiving forage cactus based diets. Five animals were randomly assigned to a 5 × 5 Latin square design and were fed diets containing (% of DM: 0.0, 6.25, 12.50, 18.75, and 25.00% of whole cottonseed. Inclusion of whole cottonseed in the diet did not affect microbial nitrogen and microbial protein synthesis, which averaged 295.08 and 1844.27 g/day, respectively. Microbial protein synthesis and microbial nitrogen

  17. Solid electrolytes based on Na3PO4:M4+ (M = Zr, Hf, Ti, Sn, Ce, Th)

    International Nuclear Information System (INIS)

    γ-Na3PO4 solid solutions have been prepared containing a range of tetravalent ions; the replacement mechanism is 4 Na reversible M. Approximate phase diagrams have been determined for each system, showing the extent and thermal stability of the γ solid solutions. For each system, lattice parameters were measured as a function of composition and conductivities were measured for several compositions over the temperature range 70-4500C. Solid solutions which were found to be the most extensive and which had the highest conductivities (> 10-2 ohm-1 cm-1 at 3000C) were for M = Zr, Hf; these systems also showed the smallest change of lattice parameter with composition

  18. Model‐Based Assessment of Plasma Citrate Flux Into the Liver: Implications for NaCT as a Therapeutic Target

    Science.gov (United States)

    Erion, DM; Maurer, TS

    2016-01-01

    Cytoplasmic citrate serves as an important regulator of gluconeogenesis and carbon source for de novo lipogenesis in the liver. For this reason, the sodium‐coupled citrate transporter (NaCT), a plasma membrane transporter that governs hepatic influx of plasma citrate in human, is being explored as a potential therapeutic target for metabolic disorders. As cytoplasmic citrate also originates from intracellular mitochondria, the relative contribution of these two pathways represents critical information necessary to underwrite confidence in this target. In this work, hepatic influx of plasma citrate was quantified via pharmacokinetic modeling of published clinical data. The influx was then compared to independent literature estimates of intracellular citrate flux in human liver. The results indicate that, under normal conditions, NaCT inhibition will have a limited impact on hepatic citrate concentrations across species. PMID:27069776

  19. Model-Based Assessment of Plasma Citrate Flux Into the Liver: Implications for NaCT as a Therapeutic Target.

    Science.gov (United States)

    Li, Z; Erion, D M; Maurer, T S

    2016-03-01

    Cytoplasmic citrate serves as an important regulator of gluconeogenesis and carbon source for de novo lipogenesis in the liver. For this reason, the sodium-coupled citrate transporter (NaCT), a plasma membrane transporter that governs hepatic influx of plasma citrate in human, is being explored as a potential therapeutic target for metabolic disorders. As cytoplasmic citrate also originates from intracellular mitochondria, the relative contribution of these two pathways represents critical information necessary to underwrite confidence in this target. In this work, hepatic influx of plasma citrate was quantified via pharmacokinetic modeling of published clinical data. The influx was then compared to independent literature estimates of intracellular citrate flux in human liver. The results indicate that, under normal conditions, NaCT inhibition will have a limited impact on hepatic citrate concentrations across species. PMID:27069776

  20. Initial isotopic geochemistry ({delta} 18 O, {delta} D) of fluids from wells of the Los Humeros, Pue., geothermal field; Geoquimica isotopica ({delta} 18 O, {delta} D) inicial de fluidos de pozos del campo geotermico de Los Humeros, Pue.

    Energy Technology Data Exchange (ETDEWEB)

    Barragan Reyes, Rosa Maria; Arellano Gomez, Victor Manuel [Instituto de Investigaciones Electricas, Gerencia de Geotermia, Cuernavaca, Morelos (Mexico)]. E-mail: rmb@iie.org.mx; Ramirez Montes, Miguel; Tovar Aguado, Rigoberto [Comision Federal de Electricidad, Gerencia de Proyectos Geotermoelectricos, Morelia, Michoacan (Mexico)

    2010-01-15

    Isotopic data ({delta} 18 O, {delta} D) from fluids from production wells at the Los Humeros, Pue., geothermal field were analyzed to investigate the possible origin of these fluids and the dominant processes of the reservoir at its initial state. According to pre-exploitation data, it is suggested the Los Humeros reservoir fluids are made of a mixture of meteoric water of very light isotopic composition (paleo-fluids) and andesitic water. The relationship {delta} D vs {delta} 18 O from pre-exploitation data indicates the produced fluids are composed of a mixture of (at least) two fluids with distinct isotopic compositions. At the more enriched end of the mixing relationship are the isotopic compositions of the wells H-23 and H-18 (located in the southern area of the field), while the lighter fluids were found in well H-16 (originally) and then in well H-16 (repaired). It was found that the liquid phases of deep wells are more enriched in {delta} 18 O while the shallow wells present lower values, suggesting a convection process at the initial state. Based on this isotopic profile, it is considered that even the production depths of the wells H-1, H-12 and H-16 (repaired) are just about the same, but their respective isotopic compositions are quite different. The {delta} 18 O value for well H-16 (repaired) seems to be that of condensate steam, while the corresponding values for wells H-1 and H-12 fall within the value interval of the deep wells (H-23). This suggests wells H-1 and H-12 are collecting very deep fluids enriched in {delta} 18 O. These results could be useful in creating a conceptual model of the reservoir. [Spanish] Se analizaron datos isotopicos ({delta}18 O, {delta}D) de los fluidos de pozos productores del campo geotermico de Los Humeros, Pue., para investigar el posible origen de los fluidos asi como los procesos dominantes del yacimiento en su estado inicial. De acuerdo con datos previos a la explotacion, se plantea que los fluidos del yacimiento

  1. In vitro bioactivity of SiO{sub 2}, CaO, Na{sub 2}O - based glasses

    Energy Technology Data Exchange (ETDEWEB)

    Lebecq, I.; Desanglois, F.; Follet-Houttemane, C. [Univ. de Valenciennes et du Hainaut Cambresis (Spain). Lab. des Materiaux Avances Ceramiques

    2002-07-01

    Bioactivity of 15 glasses in the system SiO{sub 2}-CaO-Na{sub 2}O was evaluated by examining the formation of apatite in vitro. SiO{sub 2} content is varied between 42 mole% and 55 mole%. Surfaces of glasses soaked in SBF were studied by FTIR. An apatite layer is formed on surfaces in a wide compositional region within 4 days. Hench Bioglass 45S5 is also studied for comparison. (orig.)

  2. Model‐Based Assessment of Plasma Citrate Flux Into the Liver: Implications for NaCT as a Therapeutic Target

    OpenAIRE

    Z. Li; Erion, DM; Maurer, TS

    2016-01-01

    Cytoplasmic citrate serves as an important regulator of gluconeogenesis and carbon source for de novo lipogenesis in the liver. For this reason, the sodium‐coupled citrate transporter (NaCT), a plasma membrane transporter that governs hepatic influx of plasma citrate in human, is being explored as a potential therapeutic target for metabolic disorders. As cytoplasmic citrate also originates from intracellular mitochondria, the relative contribution of these two pathways represents critical in...

  3. Theoretical characterization of quaternary iridium based hydrides NaAeIrH{sub 6} (Ae = Ca, Ba and Sr)

    Energy Technology Data Exchange (ETDEWEB)

    Bouras, S. [Laboratory of Studies Surfaces and Interfaces of Solids Materials, Department of Physics, Faculty of Science, University of Setif 1, 19000 (Algeria); Ghebouli, B., E-mail: bghebouli@yahoo.fr [Laboratory of Studies Surfaces and Interfaces of Solids Materials, Department of Physics, Faculty of Science, University of Setif 1, 19000 (Algeria); Benkerri, M. [Laboratory of Studies Surfaces and Interfaces of Solids Materials, Department of Physics, Faculty of Science, University of Setif 1, 19000 (Algeria); Ghebouli, M.A., E-mail: med.amineghebouli@yahoo.fr [Microelectronic Laboratory (LMSE), University of Bachir Ibrahimi, Bordj-Bou-Arreridj 34000 (Algeria); Research Unit on Emerging Materials (RUEM), University of Setif 1, 19000 (Algeria); Choutri, H. [Microelectronic Laboratory (LMSE), University of Bachir Ibrahimi, Bordj-Bou-Arreridj 34000 (Algeria); Louail, L.; Chihi, T.; Fatmi, M. [Research Unit on Emerging Materials (RUEM), University of Setif 1, 19000 (Algeria); Bouhemadou, A. [Laboratory for Developing New Materials and Their Characterization, Department of Physics, Faculty of Science, University of Setif 1, 19000 (Algeria); Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451 (Saudi Arabia); Khenata, R.; Khachai, H. [Laboratoire de Physique Quantique et de Modélisation Mathématique, Université de Mascara, 29000 (Algeria)

    2015-01-15

    The quaternary iridium based hydrides NaAeIrH{sub 6} (Ae = Ca, Ba and Sr) are promising candidates as hydrogen storage materials. We have studied the structural, elastic, electronic, optical and thermodynamic properties of NaAeIrH{sub 6} (Ae = Ca, Ba and Sr) within the generalized gradient approximation, the local density approximation (LDA) and mBj in the frame of density functional perturbation theory. These alloys have a large indirect Γ–X band gap. The thermodynamic functions were computed using the phonon density of states. The origin of the possible transitions from valence band to conduction band was illustrated. By using the complex dielectric function, the optical properties such as absorption, reflectivity, loss function, refractive index and optical conductivity have been obtained. - Graphical abstract: Real and imaginary parts of the dielectric function, the absorption spectrum α(ω), reflectivity R(ω) and energy-loss spectrum L(ω). - Highlights: • NaAeIrH{sub 6} (Ae = Ca, Ba and Sr) alloys have been investigated. • The elastic moduli, energy gaps are predicted. • The optical and thermal properties were studied.

  4. Tin phosphide-based anodes for sodium-ion batteries: synthesis via solvothermal transformation of Sn metal and phase-dependent Na storage performance

    Science.gov (United States)

    Shin, Hyun-Seop; Jung, Kyu-Nam; Jo, Yong Nam; Park, Min-Sik; Kim, Hansung; Lee, Jong-Won

    2016-05-01

    There is a great deal of current interest in the development of rechargeable sodium (Na)-ion batteries (SIBs) for low-cost, large-scale stationary energy storage systems. For the commercial success of this technology, significant progress should be made in developing robust anode (negative electrode) materials with high capacity and long cycle life. Sn-P compounds are considered promising anode materials that have considerable potential to meet the required performance of SIBs, and they have been typically prepared by high-energy mechanical milling. Here, we report Sn-P-based anodes synthesised through solvothermal transformation of Sn metal and their electrochemical Na storage properties. The temperature and time period used for solvothermal treatment play a crucial role in determining the phase, microstructure, and composition of the Sn-P compound and thus its electrochemical performance. The Sn-P compound prepared under an optimised solvothermal condition shows excellent electrochemical performance as an SIB anode, as evidenced by a high reversible capacity of ~560 mAh g‑1 at a current density of 100 mA g‑1 and cycling stability for 100 cycles. The solvothermal route provides an effective approach to synthesising Sn-P anodes with controlled phases and compositions, thus tailoring their Na storage behaviour.

  5. Tin phosphide-based anodes for sodium-ion batteries: synthesis via solvothermal transformation of Sn metal and phase-dependent Na storage performance

    Science.gov (United States)

    Shin, Hyun-Seop; Jung, Kyu-Nam; Jo, Yong Nam; Park, Min-Sik; Kim, Hansung; Lee, Jong-Won

    2016-01-01

    There is a great deal of current interest in the development of rechargeable sodium (Na)-ion batteries (SIBs) for low-cost, large-scale stationary energy storage systems. For the commercial success of this technology, significant progress should be made in developing robust anode (negative electrode) materials with high capacity and long cycle life. Sn-P compounds are considered promising anode materials that have considerable potential to meet the required performance of SIBs, and they have been typically prepared by high-energy mechanical milling. Here, we report Sn-P-based anodes synthesised through solvothermal transformation of Sn metal and their electrochemical Na storage properties. The temperature and time period used for solvothermal treatment play a crucial role in determining the phase, microstructure, and composition of the Sn-P compound and thus its electrochemical performance. The Sn-P compound prepared under an optimised solvothermal condition shows excellent electrochemical performance as an SIB anode, as evidenced by a high reversible capacity of ~560 mAh g−1 at a current density of 100 mA g−1 and cycling stability for 100 cycles. The solvothermal route provides an effective approach to synthesising Sn-P anodes with controlled phases and compositions, thus tailoring their Na storage behaviour. PMID:27189834

  6. Tin phosphide-based anodes for sodium-ion batteries: synthesis via solvothermal transformation of Sn metal and phase-dependent Na storage performance.

    Science.gov (United States)

    Shin, Hyun-Seop; Jung, Kyu-Nam; Jo, Yong Nam; Park, Min-Sik; Kim, Hansung; Lee, Jong-Won

    2016-01-01

    There is a great deal of current interest in the development of rechargeable sodium (Na)-ion batteries (SIBs) for low-cost, large-scale stationary energy storage systems. For the commercial success of this technology, significant progress should be made in developing robust anode (negative electrode) materials with high capacity and long cycle life. Sn-P compounds are considered promising anode materials that have considerable potential to meet the required performance of SIBs, and they have been typically prepared by high-energy mechanical milling. Here, we report Sn-P-based anodes synthesised through solvothermal transformation of Sn metal and their electrochemical Na storage properties. The temperature and time period used for solvothermal treatment play a crucial role in determining the phase, microstructure, and composition of the Sn-P compound and thus its electrochemical performance. The Sn-P compound prepared under an optimised solvothermal condition shows excellent electrochemical performance as an SIB anode, as evidenced by a high reversible capacity of ~560 mAh g(-1) at a current density of 100 mA g(-1) and cycling stability for 100 cycles. The solvothermal route provides an effective approach to synthesising Sn-P anodes with controlled phases and compositions, thus tailoring their Na storage behaviour. PMID:27189834

  7. Theoretical characterization of quaternary iridium based hydrides NaAeIrH6 (Ae = Ca, Ba and Sr)

    International Nuclear Information System (INIS)

    The quaternary iridium based hydrides NaAeIrH6 (Ae = Ca, Ba and Sr) are promising candidates as hydrogen storage materials. We have studied the structural, elastic, electronic, optical and thermodynamic properties of NaAeIrH6 (Ae = Ca, Ba and Sr) within the generalized gradient approximation, the local density approximation (LDA) and mBj in the frame of density functional perturbation theory. These alloys have a large indirect Γ–X band gap. The thermodynamic functions were computed using the phonon density of states. The origin of the possible transitions from valence band to conduction band was illustrated. By using the complex dielectric function, the optical properties such as absorption, reflectivity, loss function, refractive index and optical conductivity have been obtained. - Graphical abstract: Real and imaginary parts of the dielectric function, the absorption spectrum α(ω), reflectivity R(ω) and energy-loss spectrum L(ω). - Highlights: • NaAeIrH6 (Ae = Ca, Ba and Sr) alloys have been investigated. • The elastic moduli, energy gaps are predicted. • The optical and thermal properties were studied

  8. Measurement of exchangeable sodium: 22Na or 24Na

    International Nuclear Information System (INIS)

    A case is made for the use of 22Na in low activities in preference to 24Na for routine diagnostic estimation of exchangeable sodium, and is based chiefly on considerations of availability, cost and radiation dosimetry. A method in which only 37 kBq (1 μCi) 22Na is administered orally is shown to be sufficiently accurate and to possess distinct advantages in terms of cost and convenience with a committed radiation dose no greater than that for a measurement using 24Na. (author)

  9. Improvement of corrosion resistance in NaOH solution and glass forming ability of as-cast Mg-based bulk metallic glasses by microalloying

    Directory of Open Access Journals (Sweden)

    Peng Hao

    2011-02-01

    Full Text Available The influences of the addition of Ag on the glass forming ability (GFA and corrosion behavior were investigated in the Mg-Ni-based alloy system by X-ray diffraction (XRD and electrochemical polarization in 0.1 mol/L NaOH solution. Results shows that the GFA of the Mg-Ni-based BMGs can be improved dramatically by the addition of an appropriate amount of Ag; and the addition element Ag can improve the corrosion resistance of Mg-Ni-based bulk metallic glass. The large difference in atomic size and large negative mixing enthalpy in alloy system can contribute to the high GFA. The addition element Ag improves the forming speed and the stability of the passive film, which is helpful to decrease the passivation current density and to improve the corrosion resistance of Mg-Ni-based bulk metallic glass.

  10. Influência da sacarose e do corte da base da haste na longevidade de inflorescências de Zinnia elegans

    Directory of Open Access Journals (Sweden)

    Carneiro Tânia Forster

    2002-01-01

    Full Text Available Flores de zínia (Zinnia elegans Jacq. são adaptadas às condições climáticas da Região Sudeste do País, com excelente potencial para a comercialização como flor de corte. O presente trabalho objetivou avaliar a influência da sacarose aplicada na forma de solução de condicionamento, e do corte periódico da base das hastes sobre a longevidade e absorção de água pelas flores. Hastes florais uniformizadas em tamanho foram submetidas ao condicionamento, por seis horas, com sacarose a 5, 10, 15 e 20% ou com soluções de 10% de sacarose por 0, 6, 12, 18 e 24 horas, com ou sem cortes periódicos na base das hastes a cada 48 horas. O tratamento das flores por seis horas com sacarose a 5, 10, 15 ou 20% não afetou a longevidade das flores, comparado àquelas mantidas somente com água destilada. O corte periódico da base das hastes promoveu melhor suprimento de água às flores, estendendo a longevidade. O condicionamento das flores com 10% de sacarose por 18 ou 24 horas acelerou a senescência das flores em vaso. A taxa de produção de etileno foi inibida pelo aumento da concentração de sacarose na solução de condicionamento.

  11. Electrochemical characterization of manganese oxide cathode materials based on Na 0.4MnO 2

    Science.gov (United States)

    Hu, Felix; Doeff, Marca M.

    Cathode materials for lithium rechargeable batteries were prepared from Na 0.4MnO 2 by solution and molten salt ion-exchanges. The former process results in partial replacement of sodium while the latter results in complete exchange. The discharge characteristics depend upon the sodium content, with the partially lithiated material exhibiting hysteresis in the charge/discharge profile and differential capacity plots from stepped potential experiments. For the fully lithiated material, a complex voltage profile with several distinct plateaus corresponding to several two-phase regions is observed. No evidence of spinel formation during ion-exchange or electrochemical cycling is seen for this system.

  12. De la geoquimica al paisaje: composicion elemental de los suelos

    NARCIS (Netherlands)

    Martinez-Cortizas, A.; Costa-Casais, M.; Kaal, J.; Ferro-Vazquez, C.; Pontevedra-Pombal, X.; Viveen, W.

    2013-01-01

    El objeto de este libro es el estudio del arte rupestre en la Edad de Bronce hasta la Edad del Hierro en Campo Lameiro (Pontevedra, Galicia), en el que se ha combinado la metodología arqueológica, histórica, etnográfica y paleoambitental, para completar el contexto arqueológico de los petroglifos añ

  13. Profil studenckiej rekreacji ruchowej na podstawie wybranych pomiarów spirometrycznych. Badania pilotażowe = The recreational student profile based on chosen spirometric measurements

    OpenAIRE

    Pujszo, Małgorzata; Drumińska, Ewelina; Wilczyńska, Sylwia; Stępniak, Robert; Pabianek, Łukasz

    2014-01-01

    Pujszo Małgorzata, Drumińska Ewelina, Wilczyńska Sylwia, Stępniak Robert, Pabianek Łukasz. Profil studenckiej rekreacji ruchowej na podstawie wybranych pomiarów spirometrycznych. Badania pilotażowe = The recreational student profile based on chosen spirometric measurements. The pilot studies. Journal of Health Sciences. 2014;4(13):257-265. ISSN 1429-9623 / 2300-665X. http://journal.rsw.edu.pl/index.php/JHS/article/view/2014%3B4%2813%29%3A257-265 http://www.ojs.ukw.edu.pl/index....

  14. Agricultura orgânica em áreas urbanas e periurbanas com base na agroecologia Challenges of organic agriculture in urban and suburban areas

    OpenAIRE

    Adriana Maria de Aquino; Renato Linhares Assis

    2007-01-01

    A agricultura orgânica com base na agroecologia é o mote tecnológico adequado à realidade dos agroecossistemas urbanos. Este artigo ressalta a necessidade de se desenvolver tecnologias e insumos específicos. A partir de experiências com agricultura urbana em diferentes países em desenvolvimento, evidencia-se a necessidade de se buscar capacidades locais e apoio do poder público, especialmente nas iniciativas da sociedade organizada e mobilizada para a produção agrícola urbana.This article pre...

  15. Todos duros: los hijos del neoliberalismo : Afectos y corporalidad en el consumo de pasta base de cocaína en jóvenes de sectores populares

    OpenAIRE

    Bruzzone, Daiana

    2015-01-01

    En el marco del Doctorado en Comunicación nos proponemos investigarla experiencia del cuerpo en la cultura contemporánea en contextos de exclusión desde una dimensión simbólico afectiva, a partir del caso de los jóvenes de sectores populares consumidores de pasta base de cocaína. Esta pregunta se sitúa en un contexto donde podemos reconocer una vuelta a los grandes interrogantes que plantean una mirada totalizante sobre los entramados sociales, revisando las articulaciones –no sin conflictos-...

  16. A influência da estrutura sociorrelacional do empreendedor na capacidade inovativa de empresas incubadas de base tecnológica

    OpenAIRE

    Hoffmann, Valmir Emill; Reyes Junior, Edgar; Danda, Gustavo da Nóbrega; Veloso, Yasmin Silva

    2016-01-01

    O objetivo desse trabalho é avaliar as influências das interações sociais dos empreendedores na capacidade de inovação das empresas em uma incubadora de base tecnológica. O processo inovação organizacional pode sofrer influências positivas quando o gestor possui habilidade em unir conhecimentos complementares e entender o processo de interação com outras organizações. Assim, analisou-se a estrutura sociorrelacional dos empreendedores, de maneira a vincular o poder das conexões dos atores à su...

  17. Produção brasileira em bases de dados sobre o processo terapêutico na terapia familiar e de casal

    OpenAIRE

    Ferreira, Vinícius Renato Thomé

    2005-01-01

    Apesar da extensa literatura psicológica, existem poucos estudos que se referem especificamente ao processo terapêutico. Isto se deve em parte à complexidade do fenômeno clínico e a uma visão distorcida que separa pesquisa e psicoterapia. No caso da terapia familiar e de casal a situação não é diferente. Objetivou-se analisar as bases de dados LILACS, SIRPEP e INDEXPSI para levantar resumos completos de artigos brasileiros referentes ao processo terapêutico na terapia familiar e de casal. Os ...

  18. Temperature dependent structures and properties of Bi0.5Na0.5TiO3-based lead free piezoelectric composite.

    Science.gov (United States)

    Zhang, Ji; Sun, Lei; Geng, Xiao-Yu; Zhang, Bin-Bin; Yuan, Guo-Liang; Zhang, Shan-Tao

    2016-07-01

    The thermal depolarization around 100 °C of the Bi0.5Na0.5TiO3-based piezoelectric solid solutions leads to the disappearance of macroscopic ferroelectric/piezoelectric properties and remains a long-standing obstacle for their actual applications. In this communication, we report lead-free piezoelectric composites of 0.94Bi0.5Na0.5TiO3-0.06BaTiO3:0.5ZnO (BNT-6BT:0.5ZnO, where 0.5 is the mole ratio of ZnO to BNT-6BT) with deferred thermal depolarization, which is experimentally confirmed by systematic temperature dependent dielectric, ferroelectric, piezoelectric measurements. Especially, based on temperature dependent X-ray diffraction measurements on unpoled and poled samples, thermal depolarization is confirmed to have no relationship with the structural phase transition, the possible mechanism for the deferred thermal depolarization is correlated with the ZnO-induced local electric field which can suppress the depolarization field. We believe our results may be helpful for understanding the origin of thermal depolarization in BNT-based piezoelectric materials, and thus provide an effective way to overcoming this obstacle. PMID:27334673

  19. Dissolution of cerium from cerium-based conversion coatings on Al 7075-T6 in 0.1 M NaCl solutions

    International Nuclear Information System (INIS)

    Highlights: ► Dissolution of cerium from cerium-based conversion coatings (CeCCs) on Al 7075-T6. ► Immersion of CeCCs in 0.1 M NaCl showed dissolution only possible at pH ⩽ 2. ► Corrosion protection of CeCCs is not provided by dissolution of cerium species. ► CeCCs corrosion protection mechanism differ from chromate-based conversion coatings. - Abstract: Cerium-based conversion coatings (CeCCs) were immersed in 0.1 M NaCl for ∼500 h over a range of pH (2.0–5.7) to investigate the dissolution of cerium species. Dissolution was detected by UV–vis spectroscopy only in the pH 2 solution. Similar cerium concentrations were detected from the dissolution of as-deposited and phosphate post-treated CeCCs. Solubility diagrams for Ce(OH)3, Ce(OH)4, CeO2, and CePO4 showed that only Ce(OH)3 was soluble in acidic conditions. Although pKsp(CePO4) ≈ pKsp(Ce(OH)3), the dissolution of the post-treated CeCCs was slightly higher than the as-deposited CeCCs. Thus, corrosion protection of CeCCs is not provided solely by dissolution of cerium species.

  20. Protective Properties of High Temperature Oxide Films on Ni-based Superalloys in 3.5% NaCl Solution

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The electrochemical behaviors of high temperature oxide film formed on the sputtered microcrystalline coating of M38 alloy (mc-M38) were investigated by potentiodynamic and electrochemical impedance spectroscopy (EIS) techniques in 3.5% NaCl solution. Mott-Schottky analysis was used to study the semi-conductive properties of the surface oxide. The results of the capacitance measurements showed that the oxide films on both the coating and the cast alloy were p-type semiconducting characteristics. Both the carrier density (Na)and the flat band potential (Efb) were obviously frequency-dependent, and the optimal frequency range was from 1000 to 1500 Hz. The oxidized coating exhibited higher protectivity than the oxidized cast alloy due to the lower carrier density compared with that of the oxidized cast alloy. The EIS data of the long-term immersing tests suggested that the oxide film served as an inner-barrier layer against chloride ions. The penetration of the aggressive ions into the surface oxide resulted in the decreased polarization resistance as a function of the immersion time.

  1. A aprendizagem por projecto na formação de educadores = Project-based learning in teacher education

    Directory of Open Access Journals (Sweden)

    Andrade, Ana Isabel

    2008-01-01

    Full Text Available Na sequência da adaptação dos cursos de formação de professores, em Portugal, ao Processo de Bolonha, foi recentemente criada a Licenciatura em Educação Básica. A novidade que este curso constitui face ao esquema de formação tradicional requer: (i a clarificação do que se entende por "educação básica" e do perfil profissional que lhe é adequado; (ii a implementação de estratégias de formação que potenciem o desenvolvimento de uma competência educativa que se crê fundamental neste perfil. Na Universidade de Aveiro, a metodologia de projecto foi assumida como uma estratégia de formação adequada a este objectivo, ainda que tenha que ser adaptada aos constrangimentos legais a que a concepção do currículo deste curso esteve sujeita.

  2. Synthesis and luminescent features of NaCaPO{sub 4}:Tb{sup 3+} green phosphor for near UV-based LEDs

    Energy Technology Data Exchange (ETDEWEB)

    Ratnam, B.V. [Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of); Jayasimhadri, M., E-mail: jayaphysics@yahoo.com [Department of Applied Physics, Delhi Technological University, Delhi 110 042 (India); Bhaskar Kumar, G. [Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of); Jang, Kiwan, E-mail: kwjang@changwon.ac.kr [Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of); Kim, S.S. [Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of); Lee, Y.I.; Lim, J.M.; Shin, D.S. [Department of Chemistry, Changwon National University, Changwon 641-773 (Korea, Republic of); Song, T.K. [School of Nano and Advanced Materials Engineering, Changwon National University, Changwon 641-773 (Korea, Republic of)

    2013-07-05

    Highlights: ► Successfully synthesized orthorhombic phase of NaCaPO{sub 4} (NCP) phosphors ► Structural and Luminescent properties have been investigated. ► In the excitation spectrum, {sup 7}F{sub 6}→{sup 5}G{sub 6} transition at 370 nm exhibit highest intensity. ► CIE coordinates of Tb{sup 3+}: NCP phosphor indicate green light emission in CIE diagram. ► Hence, Tb{sup 3+} doped NaCaPO{sub 4} is suitable for UV based pc-LEDs. -- Abstract: An efficient green emitting Tb{sup 3+} doped NaCaPO{sub 4} (NCP) phosphor was synthesized by using conventional solid-state reaction for solid-state lighting applications. X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), FT-IR, emission and excitation properties were extensively investigated for NCP phosphors. X-ray diffraction analysis confirmed the formation of NaCaPO{sub 4} with orthorhombic structure. The excitation spectrum consists of strong 4f–4f transition at around 370 nm, which has higher intensity than the f–d transition. Emission spectra indicated that this phosphor can be efficiently excited by UV light in the range from 250 to 400 nm, and shows strong emission band centered at 547 nm. Analysis of the emission spectra with different Tb{sup 3+} concentrations revealed that the optimum dopant concentration for these NCP phosphors is about 5 mol% of Tb{sup 3+}. Diminishing of {sup 5}D{sub 3} level and increasing of {sup 5}D{sub 4} level emission intensity with the Tb{sup 3+} concentration explained successfully. The emission color was analyzed and confirmed with the help of chromaticity coordinates and color temperature. The excellent luminescent properties of NaCaPO{sub 4}:Tb{sup 3+} phosphor makes it as a potential green phosphor upon near-UV LED excitation.

  3. Hot-stage transmission electron microscopy study of (Na, K)NbO3 based lead-free piezoceramics

    International Nuclear Information System (INIS)

    Hierarchical nanodomains assembled into micron-sized stripe domains, which is believed to be associated with outstanding piezoelectric properties, were observed at room temperature in a typical lead free piezoceramics, (Na0.52K0.48−x)(Nb0.95−xTa0.05)-xLiSbO3, with finely tuned polymorphic phase boundaries (x = 0.0465) by transmission electron microscopy. The evolution of domain morphology and crystal structure under heating and cooling cycles in the ceramic was investigated by in-situ hot stage study. It is found that the nanodomains are irreversibly transformed into micron-sized rectangular domains during heating and cooling cycles, which lead to the thermal instability of piezoelectric properties of the materials.

  4. Hot-stage transmission electron microscopy study of (Na, K)NbO{sub 3} based lead-free piezoceramics

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Shengbo, E-mail: shengbo.lu@yahoo.com [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon (Hong Kong); Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong); Xu, Zhengkui [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon (Hong Kong); Kwok, K. W.; Chan, Helen L. W. [Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)

    2014-07-28

    Hierarchical nanodomains assembled into micron-sized stripe domains, which is believed to be associated with outstanding piezoelectric properties, were observed at room temperature in a typical lead free piezoceramics, (Na{sub 0.52}K{sub 0.48−x})(Nb{sub 0.95−x}Ta{sub 0.05})-xLiSbO{sub 3}, with finely tuned polymorphic phase boundaries (x = 0.0465) by transmission electron microscopy. The evolution of domain morphology and crystal structure under heating and cooling cycles in the ceramic was investigated by in-situ hot stage study. It is found that the nanodomains are irreversibly transformed into micron-sized rectangular domains during heating and cooling cycles, which lead to the thermal instability of piezoelectric properties of the materials.

  5. Hot-stage transmission electron microscopy study of (Na, K)NbO3 based lead-free piezoceramics

    Science.gov (United States)

    Lu, Shengbo; Xu, Zhengkui; Kwok, K. W.; Chan, Helen L. W.

    2014-07-01

    Hierarchical nanodomains assembled into micron-sized stripe domains, which is believed to be associated with outstanding piezoelectric properties, were observed at room temperature in a typical lead free piezoceramics, (Na0.52K0.48-x)(Nb0.95-xTa0.05)-xLiSbO3, with finely tuned polymorphic phase boundaries (x = 0.0465) by transmission electron microscopy. The evolution of domain morphology and crystal structure under heating and cooling cycles in the ceramic was investigated by in-situ hot stage study. It is found that the nanodomains are irreversibly transformed into micron-sized rectangular domains during heating and cooling cycles, which lead to the thermal instability of piezoelectric properties of the materials.

  6. A Density Model Based on the Modified Quasichemical Model and Applied to the NaF-AlF3-CaF2-Al2O3 Electrolyte

    Science.gov (United States)

    Robelin, Christian; Chartrand, Patrice

    2007-12-01

    A theoretical model for the density of multicomponent inorganic liquids based on the modified quasichemical model has been presented in a previous article. In the present article, this model is applied to the NaF-AlF3-CaF2-Al2O3 electrolyte. By introducing in the Gibbs energy of the liquid phase, temperature-dependent molar volume expressions for the pure fluorides and oxides, and pressure-dependent excess parameters for the binary (and sometimes higher-order) interactions, it is possible to reproduce, and eventually predict, the molar volume and the density of the multicomponent liquid phase using standard interpolation methods. All available density data for the NaF-AlF3-CaF2-Al2O3 liquid were collected and critically evaluated, and optimized pressure-dependent model parameters have been found. This new volumetric model can be used with Gibbs energy minimization software, to calculate the molar volume and the density of cryolite-based melts used for the electroreduction of alumina in Hall-Héroult cells.

  7. Agricultura orgânica em áreas urbanas e periurbanas com base na agroecologia Challenges of organic agriculture in urban and suburban areas

    Directory of Open Access Journals (Sweden)

    Adriana Maria de Aquino

    2007-06-01

    Full Text Available A agricultura orgânica com base na agroecologia é o mote tecnológico adequado à realidade dos agroecossistemas urbanos. Este artigo ressalta a necessidade de se desenvolver tecnologias e insumos específicos. A partir de experiências com agricultura urbana em diferentes países em desenvolvimento, evidencia-se a necessidade de se buscar capacidades locais e apoio do poder público, especialmente nas iniciativas da sociedade organizada e mobilizada para a produção agrícola urbana.This article presents organic agriculture, based on agroecology, as the appropriate technology for the urban agro-ecosystem. It also points out the need for appropriate technologies and amendments development. Looking at experiences with urban agriculture in development countries, it shows the need for local capacity development and a search for the public sector support, specially of organized groups mobilized for urban agriculture production.

  8. Grapevine leaf water potential based upon near infrared spectroscopy Potencial da água na folha em videira com base em espectroscopia no infravermelho próximo

    Directory of Open Access Journals (Sweden)

    Antonio Odair Santos

    2009-06-01

    Full Text Available Leaf water potential is a measure commonly used to describe crop water status and water stress dynamics. The established method for determining leaf water potential using a pressure chamber is cumbersome and subject to operator error as well as time/temperature limitations. These limitations prohibit the intensive sampling required to support proactive water management of commercial crops, including vineyards. Particular for grapevines there is need for faster, more precise and more reliable tools for determining leaf water potential in the field. Portable Near-infrared spectroscopy and multivariate data analysis were applied for the modeling and prediction of leaf water potential in grapevines. For field-grown wine grapes the most significant and intensive leaf absorptions occurs in the region from 1440 to 1950 nm and again beyond 2,200 nm. Multivariate analysis of these spectra, referenced against pressure chamber measurements as a standard, showed correlation coefficients from 0.87 to 0.95 clearly demonstrated that this technology can provide a fast and reasonable assessment of leaf water potential in the field.O potencial da água na folha é um parâmetro amplamente utilizado para descrever o estado hídrico e a dinâmica do estresse hídrico de culturas de interesse agrícola, onde se inclui a videira vinífera. Um dos métodos correntes para determinação do potencial da água na folha é a câmara de pressão, que é complexa, sujeita a erros operacionais, possuindo limitações no preparo da amostra ligados ao tempo/temperatura. As limitações citadas dificultam amostragens intensivas requeridas para subsidiar estratégias de manejo mais avançadas em cultivos comerciais, como vinhedos. Portanto, há carência de instrumentação que ofereça maior rapidez de leitura, precisão e confiabilidade para a determinação do potencial da água na folha. Espectroscopia "portátil", operando na faixa do infravermelho-próximo e an

  9. Radiolabeling of DOTA-like conjugated peptides with generator-produced (68)Ga and using NaCl-based cationic elution method.

    Science.gov (United States)

    Mueller, Dirk; Breeman, Wouter A P; Klette, Ingo; Gottschaldt, Michael; Odparlik, Andreas; Baehre, Manfred; Tworowska, Izabela; Schultz, Michael K

    2016-06-01

    Gallium-68 ((68)Ga) is a generator-produced radionuclide with a short half-life (t½ = 68 min) that is particularly well suited for molecular imaging by positron emission tomography (PET). Methods have been developed to synthesize (68)Ga-labeled imaging agents possessing certain drawbacks, such as longer synthesis time because of a required final purification step, the use of organic solvents or concentrated hydrochloric acid (HCl). In our manuscript, we provide a detailed protocol for the use of an advantageous sodium chloride (NaCl)-based method for radiolabeling of chelator-modified peptides for molecular imaging. By working in a lead-shielded hot-cell system,(68)Ga(3+) of the generator eluate is trapped on a cation exchanger cartridge (100 mg, ∼8 mm long and 5 mm diameter) and then eluted with acidified 5 M NaCl solution directly into a sodium acetate-buffered solution containing a DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) or DOTA-like chelator-modified peptide. The main advantages of this procedure are the high efficiency and the absence of organic solvents. It can be applied to a variety of peptides, which are stable in 1 M NaCl solution at a pH value of 3-4 during reaction. After labeling, neutralization, sterile filtration and quality control (instant thin-layer chromatography (iTLC), HPLC and pH), the radiopharmaceutical can be directly administered to patients, without determination of organic solvents, which reduces the overall synthesis-to-release time. This procedure has been adapted easily to automated synthesis modules, which leads to a rapid preparation of (68)Ga radiopharmaceuticals (12-16 min). PMID:27172166

  10. Improvement of the piezoelectric properties in (K,Na)NbO{sub 3}-based lead-free piezoelectric ceramic with two-phase co-existing state

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, H., E-mail: hide-yamada@mg.ngkntk.co.jp; Matsuoka, T.; Kozuka, H.; Yamazaki, M.; Ohbayashi, K. [NGK SPARK PLUG CO., LTD., 2808 Iwasaki, Komaki, Aichi 485-8510 (Japan); Ida, T., E-mail: ida.takashi@nitech.ac.jp [Advanced Ceramics Research Center, Nagoya Institute of Technology, 10-6-29 Asahigaoka, Tajimi, Gifu 507-0071 (Japan)

    2015-06-07

    Two phases of (K,Na)NbO{sub 3} (KNN) co-exist in a KNN-based composite lead-free piezoelectric ceramic 0.910(K{sub 1−x}Na{sub x}){sub 0.86}Ca{sub 0.04}Li{sub 0.02}Nb{sub 0.85}O{sub 3−δ}–0.042K{sub 0.85}Ti{sub 0.85}Nb{sub 1.15}O{sub 5} –0.036BaZrO{sub 3}–0.0016Co{sub 3}O{sub 4}– 0.0025Fe{sub 2}O{sub 3}–0.0069ZnO system, over a wide range of Na fractions, where 0.56 ≤ x ≤ 0.75. The crystal systems of the two KNN phases are identified to tetragonal and orthorhombic by analyzing the synchrotron powder X-ray diffraction (XRD) data, high-resolution transmission electron microscopy (HR-TEM), and selected-area electron diffraction (SAD). In the range 0.33 ≤ x ≤ 0.50, the main component of the composite system is found to be single-phase KNN with a tetragonal structure. Granular nanodomains of the orthorhombic phase dispersed in the tetragonal matrix have been identified by HR-TEM and SAD for 0.56 ≤ x ≤ 0.75. Only a trace amount of the orthorhombic phase has been found in the SAD patterns at the composition x = 0.56. However, the number of orthorhombic nanodomains gradually increases with increasing Na content up to x < 0.75, as observed from the HR-TEM images. An abrupt increase and agglomeration of the nanodomains are observed at x = 0.75, where weak diffraction peaks of the orthorhombic phase have also become detectable from the XRD data. The maximum value of the electromechanical coupling coefficient, k{sub p} = 0.56, has been observed at the composition x = 0.56.

  11. Solubility and acid-base properties of concentrated phytate in self-medium and in NaCl{sub aq} at T = 298.15 K

    Energy Technology Data Exchange (ETDEWEB)

    Cigala, Rosalia Maria; Crea, Francesco; Lando, Gabriele; Milea, Demetrio [Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Universita di Messina, Via Ferdinando Stagno d' Alcontres, 31, I-98166 Messina (Vill. S. Agata) (Italy); Sammartano, Silvio, E-mail: ssammartano@unime.i [Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Universita di Messina, Via Ferdinando Stagno d' Alcontres, 31, I-98166 Messina (Vill. S. Agata) (Italy)

    2010-11-15

    The acid-base properties of concentrated phytic acid were studied in self-medium and in NaCl{sub aq} (0.5 {<=} I/mol . L{sup -1} {<=} 4.0) by ISE-H{sup +} potentiometry and by direct calorimetry, at T = 298.15 K. At ligand concentrations c{sub (Phy)} > 0.012 mol . L{sup -1}, the formation of several binuclear H{sub i}(Phy){sub 2} (2 {<=} i {<=} 10) species was observed, in addition to the mononuclear H{sub i}Phy (1 {<=} i {<=} 7) ones. The solubility of phytate dodecasodium salt was studied in pure water and in NaCl{sub aq} at different ionic strengths; the total solubility in pure water is S{sub 0}{sup T}=(0.300{+-}0.004)mol.L{sup -1} and it decreases markedly with increasing ionic strength; for example the total solubility of Na{sub 12}Phy at I = 3.0 mol . L{sup -1} is 0.008 mol . L{sup -1}. By the dependence on ionic strength (salt concentration) of the solubility, it was possible to calculate the activity coefficients of phytate as a function of medium concentration. Direct calorimetric titrations were also carried out on Na{sub 12}Phy aqueous solutions at different phytate concentrations (0.025 {<=} c{sub (Phy)}/mol . L{sup -1} {<=} 0.100) and without addition of supporting electrolyte, in order to calculate the enthalpy changes for the protonation equilibria in self-medium of the binuclear H{sub i}(Phy){sub 2} species, at T = 298.15 K. It was observed that the {Delta}H/kJ . mol{sup -1} of the binuclear species are, within the experimental error, independent of the ionic strength; for example for the H{sub 2}(Phy){sub 2} species we obtained: {Delta}H{sub 22} = (-23.6 {+-} 0.6) kJ . mol{sup -1}, and (-23.7 {+-} 0.2) kJ . mol{sup -1} at I = 0.50 and 2.0 mol . L{sup -1}, respectively.

  12. Solubility and acid-base properties of concentrated phytate in self-medium and in NaClaq at T = 298.15 K

    International Nuclear Information System (INIS)

    The acid-base properties of concentrated phytic acid were studied in self-medium and in NaClaq (0.5 ≤ I/mol . L-1 ≤ 4.0) by ISE-H+ potentiometry and by direct calorimetry, at T = 298.15 K. At ligand concentrations c(Phy) > 0.012 mol . L-1, the formation of several binuclear Hi(Phy)2 (2 ≤ i ≤ 10) species was observed, in addition to the mononuclear HiPhy (1 ≤ i ≤ 7) ones. The solubility of phytate dodecasodium salt was studied in pure water and in NaClaq at different ionic strengths; the total solubility in pure water is S0T=(0.300±0.004)mol.L-1 and it decreases markedly with increasing ionic strength; for example the total solubility of Na12Phy at I = 3.0 mol . L-1 is 0.008 mol . L-1. By the dependence on ionic strength (salt concentration) of the solubility, it was possible to calculate the activity coefficients of phytate as a function of medium concentration. Direct calorimetric titrations were also carried out on Na12Phy aqueous solutions at different phytate concentrations (0.025 ≤ c(Phy)/mol . L-1 ≤ 0.100) and without addition of supporting electrolyte, in order to calculate the enthalpy changes for the protonation equilibria in self-medium of the binuclear Hi(Phy)2 species, at T = 298.15 K. It was observed that the ΔH/kJ . mol-1 of the binuclear species are, within the experimental error, independent of the ionic strength; for example for the H2(Phy)2 species we obtained: ΔH22 = (-23.6 ± 0.6) kJ . mol-1, and (-23.7 ± 0.2) kJ . mol-1 at I = 0.50 and 2.0 mol . L-1, respectively.

  13. An Automatic Multidocument Text Summarization Approach Based on Naïve Bayesian Classifier Using Timestamp Strategy

    Directory of Open Access Journals (Sweden)

    Nedunchelian Ramanujam

    2016-01-01

    Full Text Available Nowadays, automatic multidocument text summarization systems can successfully retrieve the summary sentences from the input documents. But, it has many limitations such as inaccurate extraction to essential sentences, low coverage, poor coherence among the sentences, and redundancy. This paper introduces a new concept of timestamp approach with Naïve Bayesian Classification approach for multidocument text summarization. The timestamp provides the summary an ordered look, which achieves the coherent looking summary. It extracts the more relevant information from the multiple documents. Here, scoring strategy is also used to calculate the score for the words to obtain the word frequency. The higher linguistic quality is estimated in terms of readability and comprehensibility. In order to show the efficiency of the proposed method, this paper presents the comparison between the proposed methods with the existing MEAD algorithm. The timestamp procedure is also applied on the MEAD algorithm and the results are examined with the proposed method. The results show that the proposed method results in lesser time than the existing MEAD algorithm to execute the summarization process. Moreover, the proposed method results in better precision, recall, and F-score than the existing clustering with lexical chaining approach.

  14. Copper-catalyzed oxidation of a structured lipid-based emulsion containing alpha-tocopherol and citric acid: influence of pH and NaCl.

    Science.gov (United States)

    Osborn-Barnes, Hannah T; Akoh, Casimir C

    2003-11-01

    The effects of salt and pH on copper-catalyzed lipid oxidation in structured lipid-based emulsions were evaluated. Ten percent oil-in-water emulsions were formulated with a canola oil/caprylic acid structured lipid and stabilized with 0.5% whey protein isolate. alpha-Tocopherol and citric acid were added to the emulsions to determine how changes in pH or the addition of NaCl affected their antioxidant activity. The peroxide values and anisidine values of emulsions stored at 50 degrees C were measured over an 8-day period. Increased lipid oxidation occurred in the pH 7.0 emulsions and when 0.5 M NaCl was added to the pH 3.0 samples. Adding alpha-tocopherol, citric acid, or a combination of the two compounds slowed the formation of hydroperoxides and their subsequent decomposition products in pH 3.0 emulsions. PMID:14582985

  15. Fabrication of flexible energy harvesting device based on K0.5Na0.5NbO3 nanopowders

    International Nuclear Information System (INIS)

    Highlights: • K0.5Na0.5NbO3 (KNN) nanopowders were fabricated by using sol–gel method. • An energy harvesting device based on KNN nanopowders were fabricated. • The mechanism of the device relies on the piezoelectric effect of KNN materials. • The power delivered to the outer load under an external force was estimated. - Abstract: K0.5Na0.5NbO3 (KNN) powder was synthesized by a novel sol–gel method and used to fabricate an energy harvesting device. The precursor gel and KNN powder were studied by thermogravimetric analysis (TG), differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The elemental composition of the KNN powder was characterized by energy dispersive X-ray analysis (EDAX). Well crystallized single phase perovskite KNN powder with an average particle size on the order of 450 nm was obtained from the gel after calcining at 750 °C for 2 h. A flexible and implantable energy harvesting device fabricated using the KNN nanopowder exhibited an output power of up to 0.13 μW with a load resistance of 100 MΩ. The Young’s modulus of the device was determined to be 10.4 GPa by atomic force microscopy (AFM)

  16. Detección de Leishmania spp. en base al gen que codifica la proteína HSP20

    Directory of Open Access Journals (Sweden)

    Ana M Montalvo

    2014-10-01

    Full Text Available Objetivos. Explorar una nueva diana para el diagnóstico molecular de Leishmania. Materiales y métodos. Se evaluó la utilidad del gen que codifica la proteína de choque térmico de 20kDa (hsp20 para la detección de Leishmania por medio de la reacción en cadena de la polimerasa (PCR.Se normalizó la PCR y se determinaron los parámetros analíticos, así como la validez y seguridad diagnóstica y la concordancia con la PCR-18S. Se evaluó la PCR-hsp20 con ADN obtenido de un grupo de muestras clínicas de distinta procedencia. Resultados. Los parámetros analíticos resultaron adecuados. La sensibilidad obtenida fue de 86% y la especificidad del 100%, la concordancia con el método de referencia resultó buena (κ = 0,731, lo que apoya su posible uso para el diagnóstico. La posibilidad de identificación posterior de la especie mediante secuenciación del producto amplificado le confiere una ventaja adicional. Conclusiones. Se demuestra la utilidad de este gen como una nueva diana para la detección del género Leishmania. Debido a su potencial, se recomienda mejorar la sensibilidad del procedimiento y realizar su evaluación en diversas regiones endémicas.

  17. Detección de Leishmania spp. en base al gen que codifica la proteína HSP20

    Directory of Open Access Journals (Sweden)

    Ana M. Montalvo

    2014-12-01

    Full Text Available Objetivos. Explorar una nueva diana para el diagnóstico molecular de Leishmania. Materiales y métodos. Se evaluó la utilidad del gen que codifica la proteína de choque térmico de 20kDa (hsp20 para la detección de Leishmania por medio de la reacción en cadena de la polimerasa (PCR.Se normalizó la PCR y se determinaron los parámetros analíticos, así como la validez y seguridad diagnóstica y la concordancia con la PCR-18S. Se evaluó la PCR-hsp20 con ADN obtenido de un grupo de muestras clínicas de distinta procedencia. Resultados. Los parámetros analíticos resultaron adecuados. La sensibilidad obtenida fue de 86% y la especificidad del 100%, la concordancia con el método de referencia resultó buena (κ = 0,731, lo que apoya su posible uso para el diagnóstico. La posibilidad de identificación posterior de la especie mediante secuenciación del producto amplificado le confiere una ventaja adicional. Conclusiones. Se demuestra la utilidad de este gen como una nueva diana para la detección del género Leishmania. Debido a su potencial, se recomienda mejorar la sensibilidad del procedimiento y realizar su evaluación en diversas regiones endémicas.

  18. Terminografia com base em corpora : um ensaio na área da construção metálica

    OpenAIRE

    Milner, Maria do Céu Henriques de Bastos; Maia, Belinda Mary Harper Sousa

    2000-01-01

    Definição dos vários sentidos do conceito "terminologia". Relações com outras disciplinas, tais como a lexicologia e lexicografia, a linguística, as ciências da documentação, a tradução e a informática. Reflexão sobre os fundamentos da terminologia: o termo, o conceito, a definição. A problemática das línguas de especialidade. Projectos de terminologia. Objectivos, princípios e metodologia. Criação de uma base de dados na área da construção metálica.

  19. Modelo para Apoiar a Gestão da Alocação de Pessoas com Base na Demanda de Conhecimento

    OpenAIRE

    Felipe Tiago Eing Engelke Back; Leonardo Ensslin; Sandra Rolim Ensslin

    2012-01-01

    Modelo de Avaliação de Desempenho para apoiar a gestão da alocação de pessoas com base na demanda de conhecimentos, habilidades e aptidões quando do desenvolvimento de seus projetos, tendo como instrumento de intervenção o método Multicritério de Apoio à Decisão Construtivista (MCDA-C). É um estudo de caráter exploratório com abordagem quali-quantitativa. Ao final, permitiu identificar: (i) três grandes dimensões de preocupação do gestor para quem o modelo foi construído; (ii) 80 critérios qu...

  20. REVESTIMENTO COMESTÍVEL À BASE DE GOMA XANTANA, COMPOSTOS LIPOFÍLICOS E/OU CLORETO DE CÁLCIO NA CONSERVAÇÃO DE MORANGOS

    Directory of Open Access Journals (Sweden)

    BIANCA SÁVIA FERREIRA LEITE

    2015-12-01

    Full Text Available RESUMO Objetivou-se com este estudo avaliar revestimentos comestíveis à base de goma xantana e glicerol, combinada a cloreto de cálcio, ácido oleico e/ou óleo essencial de hortelã-pimenta na conservação de morangos cv. Festival. Os morangos foram selecionados, lavados, sanitizados e, a seguir, submetidos a diferentes tratamentos de revestimentos à base de goma xantana acrescidos de glicerol, cloreto de cálcio, ácido oleico e/ou óleo essencial de hortelã-pimenta. Os frutos foram secos sob ventilação forçada a 4 ºC, por 15 h, e, posteriormente, embalados em bandejas com tampa de Polietileno Tereftalato (PET e armazenados a 4 ºC, durante 12 dias. Foram realizadas análises de perda de massa, firmeza, luminosidade, tonalidade, pH, acidez, sólidos solúveis totais, antocianinas e a incidência de deterioração fúngica. Os diferentes revestimentos utilizados foram eficientes na conservação dos morangos. O tratamento com goma xantana e glicerol apresentou os melhores resultados, pois a influência do ácido oleico ou do óleo essencial de hortelãpimenta, assim como do cloreto de cálcio, não foi significativa. O revestimento de goma xantana proporcionou redução da perda de massa, manutenção da firmeza, cor, pH, acidez, sólidos solúveis totais, antocianinas e não estimulou o crescimento fúngico. Desta forma, esta goma apresenta potencial para aplicação como revestimento em morangos, visando a maximizar a vida útil deste produto.

  1. Os fundamentos da identidade européia na antiguidade, na idade média e nos tempos modernos = The bases of European identity in antiquity, middle ages and in modernity

    Directory of Open Access Journals (Sweden)

    Peter Johann Mainka

    2011-01-01

    Full Text Available Depois do fim da Segunda Guerra Mundial iniciou-se o processo da unificação européia, compreendendo todas as áreas do Estado e da sociedade (legislação, jurisdição, política, economia, instituições, etc. dos 27 Estados, tão diferentes quanto às tradições e à sua história, que compõem, no momento, a União Européia. Porém, quais são os fundamentos intelectuais e os valores culturais, quais são as idéias e memórias, que dão à Europa uma identidade coerente e compartilhada, em princípio, por toda a população européia de atualmente, quase 500 milhões de pessoas? Esses alicerces intelectuais da Europa remontam à Antiguidade, à Idade Média e aos Tempos Modernos. Este trabalho pretende apresentar alguns desses fundamentos comuns da Europa, postos na Idade Média e nos Tempos Modernos (por exemplo o Cristianismo, o Humanismo e o Iluminismo, e discutir a sua importância para a identidade européia.The process of European unification started immediately after the II World War. It comprised all the areas of State and society (legislation, jurisdiction, politics, economy, institutions and others in the twenty-seven countries, highly different in their traditions and history and which now make up the European Community. Which are the intellectual bases and the cultural values, which are the ideas and memories that give Europe a coherent identity shared, at least theoretically, by the European population of approximately 500 million people? Europe's intellectual bases go back to Antiquide, to the Middle Ages and to Modernity. Current essay will provide some of Europe's common principles posited in the Middle Ages and in Modernity (for instance, Christianity, Humanism and Illuminism and will discuss their importance within Euopean identity.

  2. Extração e tratamento de dados na base lattes para identificação de core competencies em dengue.

    Directory of Open Access Journals (Sweden)

    Jorge L Magalhães

    2014-08-01

    Full Text Available Introdução: A conjuntura de competitividade global requer das organizações práticas cada vez mais ousadas de Inteligência Competitiva, a fim de obter, analisar, tratar e disseminar as informações para auxiliar na tomada de decisão. No ambiente de Big Data na Web, é premente cautela para o resgate e análise de dados a fim de transformá-los em informações essenciais para o gestor.Objetivo: Identificar e extrair a produção científica, produtos tecnológicos, instituições, redes dos cientistas que trabalham com a doença Dengue.Metodologia: Usa-se a bibliométrica com técnicas para mensurar a produção e disseminação do conhecimento científico. Analisar os 2,5 milhões de currículos da base Lattes do CNPq, extrair e tratar os que possuem o termo “dengue” com o software ScriptLattes do conceito Web 2.0.Resultados: A identificação de 15.465 currículos específicos com o tema Dengue. Extraiu-se 424 cientistas renomados na área, bem como mais 971 colaborações nacionais e internacionais relacionados com o termo dengue. O método possibilitou extrair dos especialistas a geolocalização, publicações, orientações, dentre outros.Conclusões: A análise dos resultados mostrou a relação multidisciplinar dos cientistas em Dengue. O método pode ser replicado para qualquer área da ciência. A bibliometria como fonte de auxílio no tratamento de Big Data mostrou-se eficaz através da ferramenta ScriptLattes.

  3. O impacto do uso de bases de dados sobre o servico de referencia, com enfase na comutacao bibliograficaThe impact of the use of data bases on Reference Services, emphasizing the Bibliography Exchanging Services

    Directory of Open Access Journals (Sweden)

    Maria Imaculada Cardoso Sampaio

    1998-11-01

    Full Text Available Aborda o impacto do uso de bases de dados nacionais e internacionais sobre o Serviço de Referência do Serviço de Biblioteca e Documentação do Instituto de Psicologia da Universidade de São Paulo (SBD/IPUSP, no período de 1990 a 1994. Apresenta um breve histórico da utilização das bases de dados em CD-ROM e acesso “on-line” disponíveis na biblioteca. Analisa o crescimento dos Serviços de Levantamentos Bibliográficos e Comutação Bibliográfica, através de tabelas de freqüências das solicitações dos usuários. Observa um significativo aumento na demanda desses serviços e conclui que a nova tecnologia do uso de bases de dados, tornou o Serviço de Referência mais dinâmico e participativo, uma vez que o serviço oferecido firmou-se como instrumento imprescindível para o desenvolvimento das atividades científicas.

  4. Profil studenckiej rekreacji ruchowej na podstawie wybranych pomiarów sprawności fizycznej na przykładzie Uniwersytetu Kazimierza Wielkiego = The students recreational profile - based on chosen parameters of physical fitness on the example of the Kazimierz Wielki University

    OpenAIRE

    Antkowiak, Magdalena; Engler, Maria; Drumińska, Ewelina; Wilczyńska, Sylwia; Stępniak, Robert; Pabianek, Łukasz

    2015-01-01

    Antkowiak Magdalena, Engler Maria, Drumińska Ewelina, Wilczyńska Sylwia, Stępniak Robert, Pabianek Łukasz. Profil studenckiej rekreacji ruchowej na podstawie wybranych pomiarów sprawności fizycznej na przykładzie Uniwersytetu Kazimierza Wielkiego = The students recreational profile - based on chosen parameters of physical fitness on the example of the Kazimierz Wielki University. Journal of Education, Health and Sport. 2015;5(8):326-336. ISSN 2391-8306. DOI 10.5281/zenodo.28967 htt...

  5. Comprehensive evaluation of cortical structure abnormalities in drug-naïve, adult patients with obsessive-compulsive disorder: a surface-based morphometry study.

    Science.gov (United States)

    Venkatasubramanian, Ganesan; Zutshi, Amit; Jindal, Sachin; Srikanth, Subbamma G; Kovoor, Jerry M E; Kumar, J Keshav; Janardhan Reddy, Y C

    2012-09-01

    The study objective was to comprehensively evaluate drug-naïve, adult patients with Obsessive Compulsive Disorder (OCD) for cortical structure abnormalities in comparison with healthy controls. In this cross-sectional study of case-control design, Magnetic Resonance Imaging (1-mm) was performed in drug-naïve OCD patients (N = 50) & age- sex-, education- and handedness-matched healthy controls (N = 40). We examined cortical volume, thickness, surface area & local Gyrification Index (LGI) through a completely automated surface-based morphometric analysis using FreeSurfer software. OCD symptoms and insight were assessed using Yale-Brown Obsessive Compulsive Symptom (Y-BOCS) check-list and severity scale. Illness severity was assessed using Clinical Global Impression Severity (CGI-S) Scale. OCD patients had significantly deficient volume, thickness and surface area of right anterior cingulate gyrus (ACG). Right lingual gyrus surface area was found to be significantly decreased in patients. Y-BOCS obsession score had significant negative correlation with left frontal pole volume. Y-BOCS compulsion score had significant negative correlations with right ACG volume and surface area and right lateral orbitofrontal cortex LGI. CGI-Severity score had significant negative correlations with right lingual gyrus volume, thickness and surface area as well as right lateral orbitofrontal area. Y-BOCS insight score showed a significant negative correlation with LGI of left medial OFC and left rostral ACG. Identification of novel deficits involving occipital brain regions and first-time observations of relevant correlations between various illness characteristics and cortical measures in OCD patients supports a network involving anterior cingulate, orbitofrontal and occipital brain regions in the pathogenesis of OCD. PMID:22770508

  6. An aqueous capacitor battery hybrid device based on Na-ion insertion-deinsertion in λ-MnO2 positive electrode

    International Nuclear Information System (INIS)

    Highlights: • λ-MnO2 is synthesized via treating LiMn2O4 with H2SO4. • λ-MnO2 electrode exhibits a high specific capacity of 390.7 mAh g−1 at 13.6 mA g−1. • The capacitor battery AC/λ-MnO2 shows a specific energy of 19.7 Wh Kg−1 at a power density of 3500 W Kg−1. - Abstract: A high-performance capacitor battery AC/λ-MnO2 based on Na-ion insertion-deinsertion into λ-MnO2 in 1 mol dm−3 Na2SO4 solution is successfully demonstrated. A simple acid leaching technique is used to produce λ-MnO2 by treating LiMn2O4 with H2SO4. X-ray power diffraction and inductively coupled plasma analysis provide supporting evidences for the extraction of Li+ from the LiMn2O4, and the particle morphology of λ-MnO2 is studied by scanning and transmission electron microscopy. A high specific capacity of 390.7 mAh g−1 is obtained for the λ-MnO2 electrode at a current density of 13.6 mA g−1 with a nearly 100% efficiency. The capacitor battery AC/λ-MnO2 can operate at a cell voltage as high as 2.2 V, and it exhibits a specific energy of 19.7 Wh Kg−1 at a high power density of 3500 W Kg−1 and a high energy density of 71.7 Wh Kg−1 at a low power density of 403 W Kg−1. It has potentials to be used as an energy storage device for the integration of solar and wind power into the electrical power grid

  7. Fontes de amido e proteína para vacas leiteiras em dietas à base de capim elefante Starch and protein sources in elephantgrass-based diets for lactating dairy cows

    Directory of Open Access Journals (Sweden)

    Laísse Garcia de Lima

    2002-03-01

    Full Text Available A correta associação de fontes concentradas de energia e/ou proteína ao volumoso da ração de bovinos, poderá maximizar o desempenho dos animais, como efeito da complementariedade das taxas de degradação de nutrientes. Avaliou-se o efeito de diferentes formas de processamento de milho, níveis de inclusão na dieta e fontes de proteína sobre a digestibilidade dos nutrientes na dieta, parâmetros de fermentação ruminal, bem como o desempenho de vacas leiteiras. Foram utilizadas cinco vacas da raça holandesa em lactação, distribuídas ao acaso em um delineamento experimental do tipo quadrado latino 5 x 5. Os tratamentos utilizados foram: silagem de milho, farelo de soja e milho moído (quirera fino em nível alto; capim elefante, farelo de soja, milho moído em nível alto; capim elefante, farelo de soja, milho moído em nível baixo; capim elefante, farelo de soja, milho floculado (360 g L-1 em nível alto; capim elefante, farinha de peixe, milho floculado em nível alto. A dieta contendo capim elefante, milho floculado e farelo de soja em alto nível foi a que mais se aproximou da dieta de silagem de milho nos diversos parâmetros avaliados. A fonte de proteína não degradável no rúmen (PNDR não apresentou vantagens em relação à fonte convencional de proteína. O fornecimento de baixo nível de concentrado não supriu as deficiências energéticas do capim elefante. A maior eficiência de produção de vacas leiteiras que receberam rações com base em capim elefante simulando pastejo foi observada quando a energia estava disponível no rúmen, seja através do processamento, ou seja da maior inclusão de concentrado na dieta.Ruminant performance may be improved due to association of specific energy and protein supplemental sources by matching nutrient degradation rates on diets. This work aimed to analyze the effects of corn grain processing, concentrate levels and protein sources on nutrient digestibilities, ruminal

  8. Glycemic Effectiveness of Metformin-Based Dual-Combination Therapies with Sulphonylurea, Pioglitazone, or DPP4-Inhibitor in Drug-Naïve Korean Type 2 Diabetic Patients

    Directory of Open Access Journals (Sweden)

    Young Ki Lee

    2013-12-01

    Full Text Available BackgroundThis study compared the glycemic effectiveness of three metformin-based dual therapies according to baseline hemoglobin A1c (HbA1c to evaluate the appropriateness of the guideline enforced by the National Health Insurance Corporation of Korea for initial medication of type 2 diabetes (T2D.MethodsThis prospective observational study was conducted across 24 weeks for drug-naïve Korean T2D patients with HbA1c greater than 7.5%. Subjects were first divided into three groups based on the agent combined with metformin (group 1, gliclazide-modified release or glimepiride; group 2, pioglitazone; group 3, sitagliptin. Subjects were also classified into three categories according to baseline HbA1c (category I, 7.5%≤HbA1c<9.0%; category II, 9.0%≤HbA1c<11.0%; category III, 11.0%≤HbA1c.ResultsAmong 116 subjects, 99 subjects completed the study, with 88 subjects maintaining the initial medication. While each of the metformin-based dual therapies showed a significant decrease in HbA1c (group 1, 8.9% to 6.4%; group 2, 9.0% to 6.6%; group 3, 9.3% to 6.3%; P<0.001 for each, there was no significant difference in the magnitude of HbA1c change among the groups. While the three HbA1c categories showed significantly different baseline HbA1c levels (8.2% vs. 9.9% vs. 11.9%; P<0.001, endpoint HbA1c was not different (6.4% vs. 6.6% vs. 6.0%; P=0.051.ConclusionThe three dual therapies using a combination of metformin and either sulfonylurea, pioglitazone, or sitagliptin showed similar glycemic effectiveness among drug-naïve Korean T2D patients. In addition, these regimens were similarly effective across a wide range of baseline HbA1c levels.

  9. Pobreza e indigência no Brasil: algumas evidências empíricas com base na PNAD 2004

    Directory of Open Access Journals (Sweden)

    Sonia Rocha

    2006-08-01

    Full Text Available This article presents income-based indicators using the data from the 2004 Brazilian National Household Survey regarding poverty and indigence in 2004. It refers to spatial characteristics of poverty, as well as its relation with the functioning of the labor market and the way family income is formed. The relatively sharp reduction in poverty and indigence from 2003 to 2004, the best result obtained since the Real Plan was implemented, constitutes the background for the analysis, although the impact of this reduction is spatially differentiated, more favorable in rural areas and less so in the São Paulo metropolitan area. The increase in family income is mainly due to the vigorous expansion of occupation, as the average labor income remained unchanged. Nevertheless, poor individuals benefited from the reduction in the returns to schooling, from the real increase in the minimum wage and from the wider scope of the social security net, which resulted in a more vigorous income increase at the base of distribution, thus leading to a reduction in inequality.

  10. DISKRIMINACIJA NA TRGU DELA NA PODLAGI SPOLA

    OpenAIRE

    Prnaver, Polona

    2012-01-01

    Boj proti diskriminaciji je danes velik izziv za države, katerih temelji slonijo na načelih svobode, demokracije in spoštovanja človekovih pravic. Zato morajo v svoj sistem sprejeti vse potrebne ukrepe za boj proti vsem oblikam diskriminacije, predvsem kadar te zadevajo zaposlitev in trg dela. Vendar je problem uravnoteženega zastopanja obeh spolov na trgu dela še vedno zelo prisoten. Diskriminacija glede na spola na trgu dela predstavlja celostno zakonsko urejeno področje, ki se navezuje ...

  11. Understanding the Size-Dependent Sodium Storage Properties of Na2C6O6-Based Organic Electrodes for Sodium-Ion Batteries.

    Science.gov (United States)

    Wang, Yaqun; Ding, Yu; Pan, Lijia; Shi, Ye; Yue, Zhuanghao; Shi, Yi; Yu, Guihua

    2016-05-11

    Organic electroactive materials represent a new generation of sustainable energy storage technology due to their unique features including environmental benignity, material sustainability, and highly tailorable properties. Here a carbonyl-based organic salt Na2C6O6, sodium rhodizonate (SR) dibasic, is systematically investigated for high-performance sodium-ion batteries. A combination of structural control, electrochemical analysis, and computational simulation show that rational morphological control can lead to significantly improved sodium storage performance. A facile antisolvent method was developed to synthesize microbulk, microrod, and nanorod structured SRs, which exhibit strong size-dependent sodium ion storage properties. The SR nanorod exhibited the best performance to deliver a reversible capacity of ∼190 mA h g(-1) at 0.1 C with over 90% retention after 100 cycles. At a high rate of 10 C, 50% of the capacity can be obtained due to enhanced reaction kinetics, and such high electrochemical activity maintains even at 80 °C. These results demonstrate a generic design route toward high-performance organic-based electrode materials for beyond Li-ion batteries. Using such a biomass-derived organic electrode material enables access to sustainable energy storage devices with low cost, high electrochemical performance and thermal stability. PMID:27078609

  12. Gestão da informação de produtos: base para os relacionamentos na cadeia de suprimentos

    Directory of Open Access Journals (Sweden)

    Marcelo Caldeira Pedroso

    2008-04-01

    Full Text Available This article approaches product information management as one of the critical elements for the development of relationships in the supply chain, especially those connected with e-business, collaborative processes and supply chain monitoring. Product information management is a very recent theme and only a few companies currently have systems of this nature. Corporate focus on the return on investment in information technology and the development of integrated support resources among suppliers of corporate solutions are increasingly drawing attention to the theme. Given this context, this article adopts a conceptual approach methodology based on a revision of the literature and authors' proposals. The article discusses how companies can effectively develop their product information management competencies and suggests models pertinent to e-business, collaborative processes and supply chain monitoring.

  13. Monte Carlo based approach to the LS–NaI 4πβ–γ anticoincidence extrapolation and uncertainty.

    Science.gov (United States)

    Fitzgerald, R

    2016-03-01

    The 4πβ–γ anticoincidence method is used for the primary standardization of β−, β+, electron capture (EC), α, and mixed-mode radionuclides. Efficiency extrapolation using one or more γ ray coincidence gates is typically carried out by a low-order polynomial fit. The approach presented here is to use a Geant4-based Monte Carlo simulation of the detector system to analyze the efficiency extrapolation. New code was developed to account for detector resolution, direct γ ray interaction with the PMT, and implementation of experimental β-decay shape factors. The simulation was tuned to 57Co and 60Co data, then tested with 99mTc data, and used in measurements of 18F, 129I, and 124I. The analysis method described here offers a more realistic activity value and uncertainty than those indicated from a least-squares fit alone. PMID:27358944

  14. NA22 Model Cities Project - LL244T An Intelligent Transportation System-Based Radiation Alert and Detection System

    Energy Technology Data Exchange (ETDEWEB)

    Peglow, S

    2004-02-24

    The purpose of this project was twofold: first, provide an understanding of the technical foundation and planning required for deployment of Intelligent Transportation System (ITS)-based system architectures for the protection of New York City from a terrorist attack using a vehicle-deployed nuclear device; second, work with stakeholders to develop mutual understanding of the technologies and tactics required for threat detection/identification and establish guidelines for designing operational systems and procedures. During the course of this project we interviewed and coordinated analysis with people from the New Jersey State Attorney General's office, the New Jersey State Police, the Port Authority of New York/New Jersey, the Counterterrorism Division of the New York City Police Department, the New Jersey Transit Authority, the State of New Jersey Department of Transportation, TRANSCOM and a number of contractors involved with state and federal intelligent transportation development and implementation. The basic system architecture is shown in the figure below. In an actual system deployment, radiation sensors would be co-located with existing ITS elements and the data will be sent to the Traffic Operations Center. A key element of successful system operation is the integration of vehicle data, such as license plate, EZ pass ID, vehicle type/color and radiation signature. A threat data base can also be implemented and utilized in cases where there is a suspect vehicle identified from other intelligence sources or a mobile detector system. Another key aspect of an operational architecture is the procedures used to verify the threat and plan interdiction. This was a major focus of our work and discussed later in detail. In support of the operational analysis, we developed a detailed traffic simulation model that is described extensively in the body of the report.

  15. [Suitability of spatial pattern of camping sites in Langxiang Natural Reserve, Northeast Chi- na, based on GIS technology].

    Science.gov (United States)

    Yuan, Wei; Zhang, Jie; Tan Ji-qiang; Zhou, Bo; Kang, Rui-cun; Wang, Ai-hong; Liu, Wei; Zhang, Lu

    2015-09-01

    It is an effective way for natural reserves to enhance self-supportive ability and realize sustainable development by developing ecotourism. Taking the experimental zone of Langxiang Natural Reserve in Heilongjiang Province as research object, the forest sub-compartment as research unit, and spatial pattern of environmental suitability of camping sites as research content, an evaluation index system taking natural environment, geographical security, infrastructure and traffic as project levels was built. Delphi and AHP methods were used to determine index weights. A spatial distribution map of camping environmental suitability in Langxiang Natural Reserve was drawn using the GIS spatial information processing technology based on "3S" measurement and the survey data. The results showed that the highest score for quantification of environmental suitability was 90, while the lowest score was 78, and the average value was 83.66 in the 1067 forest sub-compartments for test. The area of forest sub-compartments which were suitable for camping was 1094.44 hm2, being 12.2% of the experimental zone. The forest sub-compartments which had high environmental suitability in the research area were distributed uniformly and centralized with low degree of fragmentation. It was suggested that the contiguous forest sub-compartments with high scores of environmental suitability could be integrated for camping tourism. Due to the high level of environmental suitability for camping, the experimental zone of Langxiang Natural Reserve is suitable for developing camping tourism. Based on "3S" technology, the land use conditions of ecotourism environment of a natural reserve could be evaluated quickly and quantitatively by mathematical model. PMID:26785562

  16. Implantação do método activity based costing na logística interna de uma empresa química Activity-based costing applied to the internal logistics of a chemical company

    Directory of Open Access Journals (Sweden)

    Themis Castro de Vasconcellos

    2008-08-01

    Full Text Available Este trabalho tem como objetivo apresentar como o método ABC - activity based costing foi implantado para realizar o custeio da logística interna da empresa química BASF SA., situada na cidade de Guaratinguetá - SP. Apresentam-se: a descrição do processo de mudança do método de custeio tradicional para o método ABC, as dificuldades encontradas e como foram ultrapassadas, bem como as vantagens constatadas pela empresa. O departamento de logística da empresa funciona como um prestador de serviços, atendendo a todos os processos produtivos das divisões (unidades de negócio existentes na planta de Guaratinguetá, no que concerne à armazenagem e ao fornecimento de matérias-primas, além de atuar na retirada e na armazenagem de produto acabado. Como principais resultados, obteve-se uma distribuição de custos mais justa entre as divisões da planta, identificação de oportunidades de melhoria nos processos logísticos, identificação de processo e atividades que não agregavam valor aos produtos, entre outros. Finalmente, o processo de implantação e os resultados foram muito bem avaliados pelos gestores, o que foi decisivo para a adoção do método ABC como sistema gerencial de custos logísticos da empresa.This paper describes an Activity-Based Costin (ABC model implemented for the costing of the internal logistics of the chemical company BASF S.A. located in Guaratinguetá, state of São Paulo, Brazil. All the phases involved in the change from the traditional costing model to the ABC model adopted by the company as presented, as are the difficulties, the solutions for detected problems, and the advantages gained. The Logistics Department of BASF acts as a service provider for all the productive processes of the company's departments (Sales Business Units - SBUs in the Guaratinguetá plant in terms of raw material storage and supply, and in the removal and storage of end products. The main results were improved costing of the

  17. RESPOSTAS ELETROCARDIOGRÁFICAS DE EQUINOS AO TREINAMENTO COM BASE NA CURVA VELOCIDADE-LACTATO DETERMINADA EM ESTEIRA ROLANTE

    Directory of Open Access Journals (Sweden)

    Raquel Mincarelli Albernaz

    2011-03-01

    Full Text Available The aim of this study was to evaluate, by electrocardiographic analysis, equine cardiovascular adaptations to training based on speed-lactate curve. For this evaluation, eight Arabian horses previously submitted to four months of rest were used. The animals performed a graded exercise test (ET and samples were collected for blood lactate measurement. The speed where the blood lactate concentration reached 4.0 mmol / L (V4 was calculated by regression analysis. The estimated training speed was 60% of V4 performed on a treadmill for 45 min three times a week on alternate days for eight weeks. The electrocardiogram (ECG analysis was made before and after the beginning of the training. The training improvement is confirmed by the increase in both V2 and V4 of the second ET. After the second ECG analysis, a significant increase in the R wave amplitude was observed. Training improved the metabolic activity, promoted discrete changes in electrocardiogram; however, it was not adequate to result changes in cardiac parameters.

  18. Redução da proteína da dieta com base no conceito de proteína ideal para tilápias-do-nilo (Oreochromis niloticus criadas em tanques-rede Dietary protein reduction based on ideal protein concept for Nile Tilapia (Oreochromis niloticus cultured in net pens

    Directory of Open Access Journals (Sweden)

    Daniele Botaro

    2007-06-01

    Full Text Available Avaliou-se o desempenho de tilápias-do-nilo (Oreochromis niloticus criadas em tanques-rede e alimentadas com dietas contendo 27,0 (controle; 25,2; 24,3 e 22,7% de proteína digestível. Aminoácidos cristalinos (L-lisina, DL-metionina e L-treonina foram adicionados à dieta considerando o conceito de proteína ideal e simulando o perfil de aminoácidos da dieta controle. Os peixes (34,63±19 g foram alimentados manualmente com dietas isoenergéticas (3.075 kcal de energia digestível/kg de dieta até saciedade aparente, três vezes ao dia, durante 91 dias. Utilizou-se um delineamento inteiramente casualizado, com quatro tratamentos, três repetições e 25 peixes/unidade experimental. Não foram observados efeitos dos níveis de proteína digestível sobre o ganho de peso, a conversão alimentar, a taxa de eficiência protéica, o peso da carcaça eviscerada, o rendimento de carcaça, o peso e o rendimento de filé, a sobrevivência e o hematócrito. Houve efeito quadrático dos níveis de proteína digestível sobre o consumo; o maior valor foi estimado para a dieta contendo 24,41% de proteína digestível e excreção de nitrogênio, na qual o melhor resultado estimado foi obtido com peixes que receberam a dieta contendo 24,92% de PD. Com a redução nos níveis de proteína digestível, observou-se aumento linear na retenção de nitrogênio. É possível reduzir o nível de proteína digestível, de 27 (29,1% de PB para 24,3% (26,6% de PB, em dietas para tilápias-do-nilo criadas em tanques-rede. Essa redução deve ser feita por meio da suplementação de aminoácidos (com base no conceito de proteína ideal, considerando o desempenho e o custo da dieta/kg ganho em filé.This study was carried out to evaluate the performance of Nile tilapia, cultured in net pens, and fed diets containing 27.0 (control, 25.2, 24.3, and 22.7% of digestible protein. Crystalline amino acids (L-lysine, DL-methionine and L-threonine were added to keep amino acid

  19. Exigência de Lisina para Machos Castrados de Dois Grupos Genéticos de Suínos na Fase de Terminação, com Base no Conceito de Proteína Ideal Lysine Requirement for Castrated Males of Two Genetic Groups of Swine During Finishing Phase, Based on the Ideal Protein Concept

    OpenAIRE

    Ivan Moreira; Luiz Fernando Gasparotto; Antônio Cláudio Furlan; Valquíria Mayumi Ishida Patrício; Gisele Cristina de Oliveira

    2002-01-01

    Foi conduzido um experimento para determinar as exigências de lisina de machos castrados, em fase de terminação, de dois grupos genéticos de suínos, com base no conceito de proteína ideal. Foram utilizados 16 suínos do grupo genético comum (GGC) e 16 suínos do grupo genético melhorado (GGM), distribuídos em quatro tratamentos que consistiram de uma ração basal, à base de milho e farelo de soja, contendo 0,60% de lisina e outras três rações, acrescentando-se níveis crescentes de lisina para se...

  20. Theoretical study of Na(4p2P)+Na(3s2S) and Cd(5p3P0)+Na(3s2S) collisions and their role in the energy transfer between Cd* and Na

    International Nuclear Information System (INIS)

    We have computed the cross sections for the energy transfer process Cd(5p3P0) + Na(3s2S) →Cd(5s1S) + Na(4p2P) and for the state changing collision Na(4p2P) + Na(3s2S)→Na(3d2D) + Na(3s2S), based on theoretical interaction potentials for the NaCd and Na2 systems, respectively. Our calculations shed light on the interpretation of experiments with laser excited Na+Cd vapour mixtures. It turns out that Cd(5p3P0), in rapid equilibrium with the doorway state Cd(5p3P1), efficiently transfers energy to Na, populating the 4p2P state. The collisions with ground state Na cause a very fast conversion of the 4p2P to the 3d2D state, from which the strongest emission is observed. (orig.)

  1. A "turn-off" luminescence resonance energy transfer aptamer sensor based on near-infrared upconverting NaYF4∶Yb3+, Tm3+ nanoparticles as donors and gold nanorods as acceptors

    Institute of Scientific and Technical Information of China (English)

    Hong-Qi Chen; Juan Xu; Fei Yuan; Yong Wu; Yi-Yan Zhang; Lun Wang

    2013-01-01

    Near-infrared upconverting NaYF4:Yb3+,Tm3+ nanophosphors modified with poly(acrylic acid) were prepared and characterized by transmission electron microscopy and luminescence spectroscopy.Based on the observed overlap between the emission spectrum of the NaYF4∶Yb3+,Tm3+ nanophosphors and the absorption spectrum of the gold nanorods,we believe that a new "turn-off" luminescence resonance energy transfer aptamer sensor was constructed for sensing thrombin in near-infrared region.

  2. Predlog tehnološkog unapređenja telemetrijskog i teodolitskog sistema sa osvrtom na softverska rešenja / Proposal for technological improvement of telemetry and teodolite systems based on software solution

    Directory of Open Access Journals (Sweden)

    Veselin Gredić

    2005-01-01

    Full Text Available U ovom radu prikazan je sveobuhvatan pristup razvoju softverskog projekta na konkretnom primeru projekta tehnološkog unapređenja telemetrijskog i teodolitskog sistema. Istaknuta je potreba i značaj modeliranja sa posebnim osvrtom na objektnoorijentisani pristup. Kroz proces Rational Unified obezbeđena je kontrola iterativnog i inkremetacionog životnog ciklusa kroz širi skup uputstava koja se odnose na tehničke i organizacione aspekte, usmerene na analizu zahteva i dizajn. Detaljno su prezentovani zahtevi za tehnološka poboljšanja ova dva sistema, sa posebnim osvrtom na softverska rešenja. / Through this paper -we try to give a comprehensive approach of a software development process based on technological improvement of telemetry and teodolite systems. Modeling is focused on an objective-oriented approach. Control for an iterative and incremental life cycle is provided in the rational Unified Process - an extensive set of guidelines that address the technical and organizational aspects of software development, focusing on requirements analysis and design. We present in detail all requests for technological improvement of telemetry and teodolite systems with a special software solution approach.

  3. Mechanism of Na2SO4-induced corrosion of molybdenum containing nickel-base superalloys at high temperatures. I - Corrosion in atmospheres containing O2 only. II - Corrosion in O2 + SO2 atmospheres

    Science.gov (United States)

    Misra, A. K.

    1986-01-01

    Kinetics of the Na2SO4-induced corrosion of the molybdenum-containing nickel-base superalloys, B-1900 and Udimet 700, coated with Na2MoO4, has been studied in oxygen atmosphere at temperatures ranging from 750 to 950 C. Because the gas turbine atmosphere always contains some SO2 and SO3, the effect of atmospheric SO2 content on corrosion of Udimet-700 has also been studied. It was found that in the O2 atmosphere the melt in the catastrophic corrosion phase consists of Na2MoO4 plus MoO3, with the onset of the catastrophic corrosion coinciding with the appearance of MoO3. In the presence of low levels of atmospheric SO2 (below 0.24 percent), the melt during catastrophic corrosion contains, in addition to Na2MoO4 and MoO3, some quantities of Na2SO4. At the levels of SO2 above 1 percent, no catastrophic corrosion was observed. At these SO2 levels, internal sulfidation appears to be the primary mode of degradation.

  4. Seleção de genótipos parentais de acerola com base na divergência genética multivariada

    Directory of Open Access Journals (Sweden)

    CARPENTIERI-PÍPOLO VALÉRIA

    2000-01-01

    Full Text Available Este trabalho teve por objetivo identificar e selecionar genótipos parentais de acerola (Malpighia emarginata L. adequadas a programas de melhoramento genético. Nove caracteres quantitativos de maior importância agronômica foram usados para determinação da distância genética e formação de grupos similares de acessos. O agrupamento pelo método de Tocher, a partir das distâncias generalizadas de Mahalanobis, possibilitou a divisão de 14 genótipos em três grupos. Com base na divergência genética e no caráter agronômico-chave (teor de vitamina C, destacaram-se como mais promissores os cruzamentos dos genótipos: AM Mole pertencente ao grupo III, com os genótipos PR AM, N° 18, PR 17, PR 16, Eclipse, AM 22 e Dominga, todos pertencentes ao grupo I.

  5. Increasing the impact of medical image computing using community-based open-access hackathons: The NA-MIC and 3D Slicer experience.

    Science.gov (United States)

    Kapur, Tina; Pieper, Steve; Fedorov, Andriy; Fillion-Robin, J-C; Halle, Michael; O'Donnell, Lauren; Lasso, Andras; Ungi, Tamas; Pinter, Csaba; Finet, Julien; Pujol, Sonia; Jagadeesan, Jayender; Tokuda, Junichi; Norton, Isaiah; Estepar, Raul San Jose; Gering, David; Aerts, Hugo J W L; Jakab, Marianna; Hata, Nobuhiko; Ibanez, Luiz; Blezek, Daniel; Miller, Jim; Aylward, Stephen; Grimson, W Eric L; Fichtinger, Gabor; Wells, William M; Lorensen, William E; Schroeder, Will; Kikinis, Ron

    2016-10-01

    The National Alliance for Medical Image Computing (NA-MIC) was launched in 2004 with the goal of investigating and developing an open source software infrastructure for the extraction of information and knowledge from medical images using computational methods. Several leading research and engineering groups participated in this effort that was funded by the US National Institutes of Health through a variety of infrastructure grants. This effort transformed 3D Slicer from an internal, Boston-based, academic research software application into a professionally maintained, robust, open source platform with an international leadership and developer and user communities. Critical improvements to the widely used underlying open source libraries and tools-VTK, ITK, CMake, CDash, DCMTK-were an additional consequence of this effort. This project has contributed to close to a thousand peer-reviewed publications and a growing portfolio of US and international funded efforts expanding the use of these tools in new medical computing applications every year. In this editorial, we discuss what we believe are gaps in the way medical image computing is pursued today; how a well-executed research platform can enable discovery, innovation and reproducible science ("Open Science"); and how our quest to build such a software platform has evolved into a productive and rewarding social engineering exercise in building an open-access community with a shared vision. PMID:27498015

  6. Fabrication and evaluation of a single-element Bi0.5Na0.5TiO3-based ultrasonic transducer.

    Science.gov (United States)

    Hejazi, M Mehdi; Jadidian, Bahram; Safari, Ahmad

    2012-08-01

    This paper discusses the fabrication and characterization of a single-element ultrasonic transducer with a lead-free piezoelectric active element. A piezoelectric ceramic with composition of 0.88Bi(0.5)Na(0.5)TiO(3)-0.08Bi(0.5)K(0.5)TiO(3)- 0.04Bi(0.5)Li(0.5)TiO(3) was chosen as the active element of the transducer. This composition exhibited a thickness coupling coefficient (kt) of 0.45, a dielectric constant of 440 (at 1 kHz), and a longitudinal piezoelectric coefficient (d(33)) of 84 pC·N(-1). To make the transducer, the ceramic was sandwiched between an epoxy-tungsten backing layer and a silver epoxy matching layer. An epoxy lens was also incorporated into the transducer's design to focus the ultrasound beam. The focused transducer with a center frequency of about 23 MHz demonstrated a -6-dB bandwidth of 55% and an insertion loss of -32 dB; the -20-dB pulsed length was measured to be 150 ns. A phantom made of copper wires (30 μm in diameter) was utilized to investigate the imaging capability of the transducer. The results indicated that the fabricated transducer, with a lateral resolution of 260 μm and a relatively high depolarization temperature, could be considered as a candidate for replacement of lead-based ultrasonic transducers. PMID:22899131

  7. Calibration of a single hexagonal NaI(Tl) detector using a new numerical method based on the efficiency transfer method

    Energy Technology Data Exchange (ETDEWEB)

    Abbas, Mahmoud I., E-mail: mabbas@physicist.net [Physics Department, Faculty of Science, Alexandria University, 21511 Alexandria (Egypt); Badawi, M.S. [Physics Department, Faculty of Science, Alexandria University, 21511 Alexandria (Egypt); Ruskov, I.N. [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation); Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784 Sofia (Bulgaria); El-Khatib, A.M. [Physics Department, Faculty of Science, Alexandria University, 21511 Alexandria (Egypt); Grozdanov, D.N. [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation); Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784 Sofia (Bulgaria); Thabet, A.A. [Department of Medical Equipment Technology, Faculty of Allied Medical Sciences, Pharos University in Alexandria (Egypt); Kopatch, Yu.N. [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation); Gouda, M.M. [Physics Department, Faculty of Science, Alexandria University, 21511 Alexandria (Egypt); Skoy, V.R. [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)

    2015-01-21

    Gamma-ray detector systems are important instruments in a broad range of science and new setup are continually developing. The most recent step in the evolution of detectors for nuclear spectroscopy is the construction of large arrays of detectors of different forms (for example, conical, pentagonal, hexagonal, etc.) and sizes, where the performance and the efficiency can be increased. In this work, a new direct numerical method (NAM), in an integral form and based on the efficiency transfer (ET) method, is used to calculate the full-energy peak efficiency of a single hexagonal NaI(Tl) detector. The algorithms and the calculations of the effective solid angle ratios for a point (isotropic irradiating) gamma-source situated coaxially at different distances from the detector front-end surface, taking into account the attenuation of the gamma-rays in the detector's material, end-cap and the other materials in-between the gamma-source and the detector, are considered as the core of this (ET) method. The calculated full-energy peak efficiency values by the (NAM) are found to be in a good agreement with the measured experimental data.

  8. Solubility and modeling acid-base properties of adrenaline in NaCl aqueous solutions at different ionic strengths and temperatures.

    Science.gov (United States)

    Bretti, Clemente; Cigala, Rosalia Maria; Crea, Francesco; De Stefano, Concetta; Vianelli, Giuseppina

    2015-10-12

    Solubility and acid-base properties of adrenaline were studied in NaCl aqueous solutions at different ionic strengths (0solubility of the ligand was calculated from simple mass balance equations, by using the free hydrogen concentration and the protonation constants of the ligand determined in the same experimental conditions of the solubility measurements. The salting-In or Out parameters and the activity coefficient of the neutral species were calculated by means of the Setschenow equation. The dependence of the protonation constants on the ionic strength was modeled by means of the Debye-Hückel type equation and of the SIT (Specific ion Interaction Theory) approach. The specific interaction parameters of the ion pairs were also reported. For the protonation constants, the following thermodynamic values at infinite dilution were obtained: T=298.15 K, logK1(H0)=10.674±0.018 and logK2(H0)=8.954±0.022; T=310.15K, logK1(H0)=10.355±0.018 and logK2(H0)=8.749±0.030. PMID:26122929

  9. Modelo para Apoiar a Gestão da Alocação de Pessoas com Base na Demanda de Conhecimento

    Directory of Open Access Journals (Sweden)

    Felipe Tiago Eing Engelke Back

    2012-11-01

    Full Text Available Modelo de Avaliação de Desempenho para apoiar a gestão da alocação de pessoas com base na demanda de conhecimentos, habilidades e aptidões quando do desenvolvimento de seus projetos, tendo como instrumento de intervenção o método Multicritério de Apoio à Decisão Construtivista (MCDA-C. É um estudo de caráter exploratório com abordagem quali-quantitativa. Ao final, permitiu identificar: (i três grandes dimensões de preocupação do gestor para quem o modelo foi construído; (ii 80 critérios que representam as preocupações associadas aos valores do Gestor (iii construir escalas ordinais e cardinais para cada critério com seus níveis de referência e realizar a integração através das taxas de compensação; e para o Ponto de Vista Fundamental – Gestão: (iv realizar e avaliar o diagnóstico da situação atual da alternativa analisada em 63 pontos, em uma escala cardinal; e (v apresentar o modelo com proposta de ações de aperfeiçoamento que elevaram sua avaliação para 73.DOI:10.5585/gep.v3i2.63

  10. A comparison of the rhizosphere-based method with DTPA, EDTA, CaCl2, and NaNO3 extraction methods for prediction of bioavailability of metals in soil to barley

    International Nuclear Information System (INIS)

    A rhizosphere-based method was compared with DTPA, EDTA, CaCl2, and NaNO3 extraction methods for the evaluation of bioavailability of heavy metals in soil to barley. The extractable amounts of Cr, Cu, Zn and Cd analyzed by the rhizosphere-based method correlated significantly with the metal content of barley roots. The extractable metals identified by DTPA, EDTA, CaCl2 and NaNO3 methods exhibited relatively poor or no correlation with the metal content of barley roots. The stepwise multiple regression equation of the rhizosphere-based method was the simplest one, as no soil properties needed to be entered, whereas the equations for the DTPA, EDTA, CaCl2 and NaNO3 extraction methods always require those variables. The most distinct feature of the rhizosphere-based method was that the proposed method was suitable for acidic, neutral and near alkaline soils. In contrast, the other extraction methods were restricted to soil types. In summary, the rhizosphere-based method is the most robust approach for evaluation of bioavailability of metals in soil to barley. - The rhizosphere-based method is a preferred approach for evaluating bioavailability of metals in soil

  11. Performance analysis of gamma ray spectrometric parameters on digital signal and analog signal processing based MCA systems using NaI(Tl) detector

    Energy Technology Data Exchange (ETDEWEB)

    Kukreti, B.M., E-mail: bharatkuk@gmail.com [Atomic Minerals Directorate for Exploration and Research, Physics Laboratory, Department of Atomic Energy, Nongmynsong, AMD Complex, Shillong, Meghalaya 793019 (India); Sharma, G.K. [Atomic Minerals Directorate for Exploration and Research, Physics Laboratory, Department of Atomic Energy, Nongmynsong, AMD Complex, Shillong, Meghalaya 793019 (India)

    2012-05-15

    Accurate and speedy estimations of ppm range uranium and thorium in the geological and rock samples are most useful towards ongoing uranium investigations and identification of favorable radioactive zones in the exploration field areas. In this study with the existing 5 in. Multiplication-Sign 4 in. NaI(Tl) detector setup, prevailing background and time constraints, an enhanced geometrical setup has been worked out to improve the minimum detection limits for primordial radioelements K{sup 40}, U{sup 238} and Th{sup 232}. This geometrical setup has been integrated with the newly introduced, digital signal processing based MCA system for the routine spectrometric analysis of low concentration rock samples. Stability performance, during the long counting hours, for digital signal processing MCA system and its predecessor NIM bin based MCA system has been monitored, using the concept of statistical process control. Monitored results, over a time span of few months, have been quantified in terms of spectrometer's parameters such as Compton striping constants and Channel sensitivities, used for evaluating primordial radio element concentrations (K{sup 40}, U{sup 238} and Th{sup 232}) in geological samples. Results indicate stable dMCA performance, with a tendency of higher relative variance, about mean, particularly for Compton stripping constants. - Highlights: Black-Right-Pointing-Pointer Geometrical enhancement for ppm range primordial radio elemental determination. Black-Right-Pointing-Pointer Experimental constraints include detector setup, background and counting time. Black-Right-Pointing-Pointer Gamma spectrometric performance monitored on digital and analog MCA systems. Black-Right-Pointing-Pointer Study indicates higher variance of Compton stripping constants on digital MCA system.

  12. Application of accelerated carbonation with a combination of Na2CO3 and CO2 in cement-based solidification/stabilization of heavy metal-bearing sediment.

    Science.gov (United States)

    Chen, Quanyuan; Ke, Yujuan; Zhang, Lina; Tyrer, Mark; Hills, Colin D; Xue, Gang

    2009-07-15

    The efficient remediation of heavy metal-bearing sediment has been one of top priorities of ecosystem protection. Cement-based solidification/stabilization (s/s) is an option for reducing the mobility of heavy metals in the sediment and the subsequent hazard for human beings and animals. This work uses sodium carbonate as an internal carbon source of accelerated carbonation and gaseous CO(2) as an external carbon source to overcome deleterious effects of heavy metals on strength development and improve the effectiveness of s/s of heavy metal-bearing sediment. In addition to the compressive strength and porosity measurements, leaching tests followed the Chinese solid waste extraction procedure for leaching toxicity - sulfuric acid and nitric acid method (HJ/T299-2007), German leaching procedure (DIN38414-S4) and US toxicity characteristic leaching procedures (TCLP) have been conducted. The experimental results indicated that the solidified sediment by accelerated carbonation was capable of reaching all performance criteria for the disposal at a Portland cement dosage of 10 wt.% and a solid/water ratio of 1:1. The concentrations of mercury and other heavy metals in the leachates were below 0.10mg/L and 5mg/L, respectively, complying with Chinese regulatory level (GB5085-2007). Compared to the hydration, accelerated carbonation improved the compressive strength of the solidified sediment by more than 100% and reduced leaching concentrations of heavy metals significantly. It is considered that accelerated carbonation technology with a combination of Na(2)CO(3) and CO(2) may practically apply to cement-based s/s of heavy metal-bearing sediment. PMID:19128876

  13. Sodium ion dynamics in a sulfonate based ionomer system studied by 23Na solid-state nuclear magnetic resonance and impedance spectroscopy

    International Nuclear Information System (INIS)

    A poly(2-acrylamido-2-methyl-1-propane-sulphonate) (PAMPS) ionomer containing both sodium and quaternary ammonium cations functionalised with an ether group, has been characterised in terms of its thermal properties, ionic conductivity and sodium ion dynamics. The ether oxygen was incorporated to reduce the Na+ association with the anionic sulfonate groups tethered to the polymer backbone, thereby promoting ion dissociation and ultimately enhancing the ionic conductivity. This functionalised ammonium cation led to a significant reduction in the ionomer Tg compared to an analogue system without an ether group, resulting in an increase in ionic conductivity of approximately four orders of magnitude. The sodium ion dynamics were probed by 23Na solid-state NMR, which allowed the signals from the dissociated (mobile) and bound Na+ cations to be distinguished. This demonstrates the utility of 23Na solid-state NMR as a probe of sodium dynamics in ionomer systems

  14. A novel temperature-gradient Na±β-alumina solid electrolyte based SOx gas sensor without gaseous reference electrode

    DEFF Research Database (Denmark)

    Rao, N.; Bleek, C.M. Van den; Schoonman, J.;

    1992-01-01

    An electrochemical SOx ps sensor with a tubular Na+-beta"-alumina solid electrolyte has been fabricated and tested under non-isothermal conditions. The temperature difference between the reference and working electrode of the sensor cell is about 100-degrees-C, which causes a serious deviation of...... SO2 ps at the two electrodes. The EMF of this so-called TGNB (Temperature Gradient Na+-beta"-alumina) SOx sensor is in good agreement with the theoretical prediction. The consistence of the experimental results with the theoretical values and the simple construction of this type of SOx sensor...... investigate the sensor material before and after use, confirming the formation of a glassy phase of Na2SO4 by an electrochemical reaction at the interface of the platinum electrodes and Na+-beta"-alumina. According to this new theoretical derivation, the sensor design could be simplified by applying the same...

  15. A novel temperature-gradient Na±β-alumina solid electrolyte based SOx gas sensor without gaseous reference electrode

    DEFF Research Database (Denmark)

    Rao, N.; Bleek, C.M. Van den; Schoonman, J.; Sørensen, Ole Toft

    An electrochemical SOx ps sensor with a tubular Na+-beta"-alumina solid electrolyte has been fabricated and tested under non-isothermal conditions. The temperature difference between the reference and working electrode of the sensor cell is about 100-degrees-C, which causes a serious deviation of...... investigate the sensor material before and after use, confirming the formation of a glassy phase of Na2SO4 by an electrochemical reaction at the interface of the platinum electrodes and Na+-beta"-alumina. According to this new theoretical derivation, the sensor design could be simplified by applying the same...... SO2 ps at the two electrodes. The EMF of this so-called TGNB (Temperature Gradient Na+-beta"-alumina) SOx sensor is in good agreement with the theoretical prediction. The consistence of the experimental results with the theoretical values and the simple construction of this type of SOx sensor...

  16. The NA49 experiment

    CERN Multimedia

    Patrice Loiez

    2000-01-01

    The two spokespersons of NA49, Reinhard Stock, Frankfurt (1991-1996), sitting and standing, Peter Seyboth, (1997-present), MPI Munich, in the target area of NA49 in front of the first superconducting vertex magnetone of the TPCs. NA49 is one of the seven experiments (NA44, NA45, NA49, NA50, NA52, WA97/NA57 and WA98) involved in CERN's Heavy Ion programme which provided evidence for the existence of a new state of matte, the quark-gluon plasma. In this state, quarks, instead of being bound up into more complex particles such as protons and neutrons, are liberated and roam freely. Theory predicts that this state must have existed at about 10 microseconds after the Big Bang, before the formation of matter as we know it today.

  17. Precarização do trabalho e risco de acidentes na construção civil: um estudo com base na Análise Coletiva do Trabalho (ACT) Work precariousness and risk of accidents in civil construction: a study based on the Collective Work Analysis

    OpenAIRE

    Mara Alice Batista Conti Takahashi; Reginalice Cera da Silva; Luiz Eduardo Cobra Lacorte; Gislaine Cecília de Oliveira Ceverny; Rodolfo Andrade de Gouveia Vilela

    2012-01-01

    Este artigo descreve a atividade e a percepção dos trabalhadores da construção civil sobre os riscos e a carga de trabalho. O estudo, com base na Análise Coletiva de Trabalho (ACT), é parte de pesquisa em políticas públicas para aprimoramento do Sistema de Vigilância em Acidentes de Trabalho (SIVAT) de Piracicaba-SP. Priorizou-se a construção civil pela magnitude epidemiológica de ocorrência de acidentes de trabalho e a baixa eficácia das ações tradicionais de vigilância pelas características...

  18. Avaliação da diversidade fenotípica em rambuteiras (Nephelium lappaceum) com base na qualidade dos frutos Evaluation of phenotipic diversity in rambutan trees (Nephelium lappaceum) based on fruit quality

    OpenAIRE

    Célio Kersul do Sacramento; James Nascimento Gattward; Waldemar de Sousa Barretto; Sérgio José Oliveira Ribeiro; Dario Ahnert

    2013-01-01

    O rambotã (Nephelium lappaceum L.), fruta originária da Ásia, é cultivado comercialmente no Brasil, nos Estados da Pará e Bahia, mas devido à propagação sexuada, apresenta grande variabilidade para características morfológicas e químicas dos frutos. Visando a identificar potenciais matrizes, foram avaliados, em Ituberá-BA, frutos de 105 genótipos de rambotã com base na coloração da casca, suculência e teor de sólidos solúveis. Nesse grupo de plantas, 80 genótipos (76,2%) apresentaram frutos c...

  19. Anodic Synthesis and Characterization of Na-Pb-O, Na-Pb-Bi-O Crystals

    Institute of Scientific and Technical Information of China (English)

    Li Mei QIU; Fen LIU; Liang Zhong ZHAO

    2005-01-01

    Crystals of Na-Pb-O and Na-Pb-Bi-O were electrosynthesized on the anode from molten salts. The resulting crystals have a hexagonal structure, in which the base ions (Pb and Bi) are in high oxidation states. By using KOH/NaOH (atomic ratio K:Na=1:1) mixture as a flux,incorporation of K ions into the lattice is inhibited while incorporation of Bi ions is enhanced. The magnetic measurement shows that the Na-Pb-Bi-O crystals are dominated by diamagnetism.

  20. Synthesis of anodic titania nanotubes in Na{sub 2}SO{sub 4}/NaF electrolyte: A comparison between anodization time and specimens with biomaterial based approaches

    Energy Technology Data Exchange (ETDEWEB)

    Balakrishnan, M., E-mail: blkrish88@gmail.com [Department of Metallurgical Engineering, PSG College of Technology, Coimbatore 641 004 (India); Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036 (India); Narayanan, R. [Department of Metallurgical Engineering, PSG College of Technology, Coimbatore 641 004 (India); Department of Mechanical Engineering, Saveetha School of Engineering, Chennai 602 105 (India)

    2013-07-01

    Surface modification of commercially pure titanium (cp-Ti) has been carried out by electrochemical anodic oxidation at constant voltage for different time periods (0.5, 1, 2 and 4.5 h). Currents developed during the anodization indicate that the nanotubes are formed due to the competition of titania formation and dissolution under the assistance of electric field. Topologies of the anodized titanium change remarkably with time of oxidation. The morphology of the as-prepared nanotubes was characterized by scanning electron microscopy and atomic force microscopy while the chemistry and crystallinity were characterized by energy-dispersive X-ray spectroscopy and X-ray diffraction respectively. The as-anodized oxide was of amorphous but transformed to anatase and/or rutile crystal structure upon annealing for 3 h at 600 °C. The anatase structure showed excellent apatite-forming ability and produced a compact apatite layer covering the surface completely upon treatment in simulated body fluid (SBF) solution for 30 h. Corrosion of anodized titanium samples was studied in a SBF solution using open circuit potential, polarization and electrochemical impedance measurements and compared with that of non-oxidized titanium. Among these samples, titanium anodized for 4.5 h exhibited superior corrosion properties. - Highlights: • We synthesized TiO{sub 2} nanotubes by anodization in Na{sub 2}SO{sub 4}/NaF electrolyte. • Topologies of the anodized titanium change remarkably with oxidation time. • We studied surface morphologies of TiO{sub 2} nanotubes. • TiO{sub 2} nanotubes show superior corrosion resistance.

  1. Experimental And Modelling Investigations on Na-Illite: Acid-Base Behaviour And the Sorption Of Strontium, Nickel, Europium And Uranyl

    Energy Technology Data Exchange (ETDEWEB)

    Bradbury, M.H.; Baeyens, B

    2005-06-01

    In an extensive study the physico-chemical, protolysis and sorption characteristics of Sr(II), Ni(II), Eu(III) and U(VI) have been measured on illite and modeled over a wide range of pH, sorbate and NaCI0{sub 4} concentrations. SampIes of Illite du Puy, collected in the region of Le Puy-en- Velay, France, were carefully conditioned to the Na-form and physico-chemically characterised. Potentiometric titrations on suspensions of the Na-illite were carried out using a batch back titration technique in 0.01, 0.1 and 0.5 M NaCI0{sub 4} background electrolytes from pH 2 to 12 in an inert atmosphere glove box. The supernatant solutions from each titration experiment in each series were analysed for K, Mg, Ca, Sr, Si, Al, Fe and Mn. The titration data were modeled in terms of the protolysis of two amphoteric edge sites (=S{sup W1}0H and =S{sup W2}0H) without an electrostatic term. The protonation/deprotonation constants and site capacities obtained from the titration measurements were then fixed. The sorption edge and isotherm data were modeled with strong (=S{sup S}OH) and weak (=S{sup W1}0H) surface complexation sites, assumed to have the same protolysis constants, again without electrostatic terms. Uptake by cation exchange was included in all of the calculations. This sorption model, the 2 site protolysis non electrostatic surface complexation and cation exchange model, had been developed previously for montmorillonite and was successful in describing the sorption characteristics of Sr, Ni, Eu and U on Na-illite over a wide range of conditions. Cation exchange capacity, strong and weak site capacities and protolysis constants for Na-illite are given, together with surface complexation constants and selectivity coefficients for Sr, Ni, Eu and U. At 0.01 M NaCI0{sub 4} and pH below 8 the sorption of Sr, Ni, Eu and U was dominated by a cation exchange mechanism. The strong dependency of sorption on pH observed under these conditions arose from the competitive effects of

  2. Experimental And Modelling Investigations on Na-Illite: Acid-Base Behaviour And the Sorption Of Strontium, Nickel, Europium And Uranyl

    International Nuclear Information System (INIS)

    In an extensive study the physico-chemical, protolysis and sorption characteristics of Sr(II), Ni(II), Eu(III) and U(VI) have been measured on illite and modeled over a wide range of pH, sorbate and NaCI04 concentrations. SampIes of Illite du Puy, collected in the region of Le Puy-en- Velay, France, were carefully conditioned to the Na-form and physico-chemically characterised. Potentiometric titrations on suspensions of the Na-illite were carried out using a batch back titration technique in 0.01, 0.1 and 0.5 M NaCI04 background electrolytes from pH 2 to 12 in an inert atmosphere glove box. The supernatant solutions from each titration experiment in each series were analysed for K, Mg, Ca, Sr, Si, Al, Fe and Mn. The titration data were modeled in terms of the protolysis of two amphoteric edge sites (=SW10H and =SW20H) without an electrostatic term. The protonation/deprotonation constants and site capacities obtained from the titration measurements were then fixed. The sorption edge and isotherm data were modeled with strong (=SSOH) and weak (=SW10H) surface complexation sites, assumed to have the same protolysis constants, again without electrostatic terms. Uptake by cation exchange was included in all of the calculations. This sorption model, the 2 site protolysis non electrostatic surface complexation and cation exchange model, had been developed previously for montmorillonite and was successful in describing the sorption characteristics of Sr, Ni, Eu and U on Na-illite over a wide range of conditions. Cation exchange capacity, strong and weak site capacities and protolysis constants for Na-illite are given, together with surface complexation constants and selectivity coefficients for Sr, Ni, Eu and U. At 0.01 M NaCI04 and pH below 8 the sorption of Sr, Ni, Eu and U was dominated by a cation exchange mechanism. The strong dependency of sorption on pH observed under these conditions arose from the competitive effects of Ca and Al on the uptake of the sorbate

  3. Prediction of Setschenow constants of N-heteroaromatics in NaCl solutions based on the partial charge on the heterocyclic nitrogen atom.

    Science.gov (United States)

    Yang, Bin; Li, Zhongjian; Lei, Lecheng; Sun, Feifei; Zhu, Jingke

    2016-02-01

    The solubilities of 19 different kinds of N-heteroaromatic compounds in aqueous solutions with different concentrations of NaCl were determined at 298.15 K with a UV-vis spectrophotometry and titration method, respectively. Setschenow constants, Ks, were employed to describe the solubility behavior, and it is found that the higher ring numbers of N-heteroaromatics gave rise to the lower values of Ks. Moreover, Ks showed a good linear relationship with the partial charge on the nitrogen atom (QN) for either QN > 0 or QN NaCl solution for QN 0. PMID:26490915

  4. Potassium estimation in the soil solution based on electrical conductivity and soil water content Estimativa de potássio na solução do solo baseada na condutividade elétrica e umidade do solo

    Directory of Open Access Journals (Sweden)

    Torquato M. de Andrade Neto

    2012-06-01

    Full Text Available The objective of this work was to evaluate and to validate models for estimating potassium in the soil solution as a function of bulk electrical conductivity (ECw, soil water content (q and a soil solution electrical conductivity (ECss. Treatments consisted of using three concentrations of injecting solution of potassium chloride (1.0, 2.5 and 4.0 g L-1 which were applied by two trickle irrigation systems (microsprinkler and drip during the first cycle of the banana crop cv. Terra Maranhão. Results showed that it is feasible to estimate potassium concentration in the soil solution from data of ECss and q obtained by time domain reflectometry (TDR using an equation that combined a linear and a potential model. The estimated values of potassium concentration were close to the ones measured along the crop cycle under field conditions, with a mean normalized deviation of 10.0%, maximum and minimum deviation of 5.0 and 13.0%, respectively.O objetivo deste trabalho foi avaliar e validar modelo de estimativa de potássio na solução do solo, como função da condutividade elétrica aparente (CEa, da umidade do solo (q e da condutividade elétrica da solução do solo (CEss. Os tratamentos consistiram no uso de três concentrações de cloreto de potássio da solução de injeção (1,0, 2,5 e 4,0 g L-1 aplicadas por microaspersão e por gotejamento, durante o primeiro ciclo da cultura da bananeira cultivar Terra Maranhão. Os resultados mostraram que é viável estimar a concentração de K+ na solução do solo a partir de dados de q e CEa, obtidos por meio da técnica da reflectometria no domínio do tempo (TDR para condições de campo, com uso de equação resultante da combinação de um modelo linear e um potencial. Os valores de K+ estimados se aproximaram dos medidos ao longo do ciclo da cultura da bananeira "Terra" nas condições de campo, com desvio normalizado médio de 10%, desvio máximo e mínimo de 5,0 e 13,0%, respectivamente.

  5. O ensino da língua Brasileira de sinais na educação infantil para crianças ouvintes e surdas: considerações com base na psicologia histórico-cultural

    Directory of Open Access Journals (Sweden)

    Hivi de Castro Ruiz Marques

    2013-12-01

    Full Text Available Este artigo objetiva expor considerações teóricas a respeito do ensino da Língua Brasileira de Sinais (Libras na educação infantil como recurso na mediação entre crianças ouvintes e surdas, considerando a importância do mesmo para a inclusão, e discutir seu impacto sobre o desenvolvimento humano, sob a perspectiva da Psicologia Histórico-Cultural (PHC. O conteúdo resulta de investigação bibliográfico-conceitual desenvolvida no período de 2011-2012. Entendemos que o ensino de Libras pode favorecer a aprendizagem e o desenvolvimento de crianças surdas e ouvintes, permitindo, sobretudo, àquelas multiplicar o número de interlocutores. A Libras oportuniza trocas linguísticas efetivas entre os pares surdos e ouvintes, e às crianças ouvintes oferta o acesso a um universo cultural desconhecido. Estudos de fontes primárias (publicações soviéticas e secundárias (publicações mais recentes sobre a defectologia vygotskiana, o ensino da Libras e a linguagem apontam a possibilidade de desenvolvimento de crianças ouvintes e surdas no que concerne à linguagem, sendo importante o ensino da Libras como segunda língua, enquanto recurso para crianças ouvintes. Podemos concluir quanto é necessário incrementar o ensino da Libras, e para isso a legislação regulamentada deve ser de fato cumprida. A Libras, ao estar presente nos espaços da educação escolar, não é privilégio, mas constitui-se em conteúdo fundante ao surdo e elemento agregador para o ouvinte em seu processo de formação genérica, de homem cultural.

  6. MOBING NA DELOVNEM MESTU

    OpenAIRE

    Grunt, Maja

    2016-01-01

    Diplomsko delo se osredotoča na probleme mobinga na delovnem mestu in morebitne rešitve. Razdeljeno je na teoretični in empirični del. V teoretičnem delu smo opredelili pojem mobing na delovnem mestu, kot ga razlagajo različni avtorji, oblike mobinga, ki kažejo na to, da se v podjetjih mobing pojavlja na različne načine in v vseh smereh, vzroke za njegovo nastajanje, ki se kažejo v kulturi organizacije, značilnostih organizacije dela, značilnostih žrtev mobinga in značilnostih napadalcev. Pr...

  7. Um modelo de passo invariante baseado na função de Gompertz para prognose do crescimento A step invariant model based on gompertz´s function for Growth prognosis

    Directory of Open Access Journals (Sweden)

    Daniel Pereira Guimarães

    2000-01-01

    Full Text Available Apresenta-se um modelo de passo invariante baseado na função de Gompertz. O ajuste do modelo foi efetuado em dados de crescimento de frangos de corte e em parcelas permanentes de plantações de Eucalyptus grandis. O modelo proposto apresenta a forma Pf = Pa.exp(beta0.Sbeta2(exp(beta1 .Ia-(exp(beta1.If, em que Pf é a produção estimada na idade futura (If a partir da produção atual (Pa, observada na idade atual (Ia. S representa a introdução de nova variável ao modelo, sendo usada como variável binária representando machos e fêmeas no caso de frangos, e variável indicativa da qualidade do sítio no caso do eucalipto. As principais vantagens da utilização do modelo proposto residem na compatibilidade dos resultados, advinda da característica de passo invariante, projeções individuais e análise dos erros em diferentes intervalos temporais.A step invariant model based on Gompertz´s function is presented. Model adjustment was done on broilers and Eucalyptus grandis growth data. The proposed model presents the form Pf = Pa.exp(beta0.Sb2(exp(beta1 .Ia-(exp(beta1.If, where Pf refers to the future estimated yield at age (If based on yield (Pa observed at present age (Ia. S means the introduction of a new variable to the model, being used as binarian variable to indicate male and female broilers and as a site quality for eucalypt. The main advantages of using the proposed model resides in the compatibility of results, assured by the step invariant characteristics, individuals projections and analysis of errors based on the prognosis intervals.

  8. Towards an ecological index for tropical soil quality based on soil macrofauna Em busca de um índice ecológico para a qualidade de solo tropical com base na macrofauna edáfica

    Directory of Open Access Journals (Sweden)

    Esperanza Huerta

    2009-08-01

    Full Text Available The objective of this work was to construct a simple index based on the presence/absence of different groups of soil macrofauna to determine the ecological quality of soils. The index was tested with data from 20 sites in South and Central Tabasco, Mexico, and a positive relation between the model and the field observations was detected. The index showed that diverse agroforestry systems had the highest soil quality index (1.00, and monocrops without trees, such as pineapple, showed the lowest soil quality index (0.08. Further research is required to improve this model for natural systems that have very low earthworm biomass (O objetivo deste trabalho foi construir um índice simples com base na presença/ausência de diferentes grupos da macrofauna edáfica para auxiliar na determinação da qualidade ecológica dos solos. O índice foi testado com dados de 20 locais do sul e centro do Estado de Tabasco, México, e foi observada uma correlação positiva entre o dados gerados pelo modelo e pelas observações de campo. O índice de qualidade de solo mostrou que diversos sistemas agroflorestais tiveram a mais alta qualidade de solo (1,0 e que os monocultivos sem árvores, como o de abacaxi, apresentaram a qualidade de solo mais baixa (0,08. Este modelo precisa ser melhor desenvolvido para ser aplicado eficientemente em sistemas que apresentam naturalmente baixas densidades de minhocas (<10 g m-2 e número elevado de espécies de minhocas (5-7, como ocorre em solos de floresta tropical, cujo índice de qualidade de solo apresentou valores médios (0,5. A aplicação desse índice precisará de um guia ilustrado para os seus usuários. Mais estudos são necessários para testar o seu emprego por fazendeiros.

  9. Culturas empresarias na África Lusófona

    OpenAIRE

    Jesuíno, Jorge Correia; Reis, Elizabeth

    1996-01-01

    Análise do papel dos empresários nacionais na transição para a economia de mercado na África Lusófona, tendo por base o problema das "culturas empresariais". Caracterização das "culturas empresariais" emergentes na África Lusófona.

  10. Drop out Estimation Students based on the Study Period: Comparisonbetween Naïve Bayes and Support Vector Machines Algorithm Methods

    Science.gov (United States)

    Harwati; Ikha Virdyanawaty, Riezky; Mansur, Agus

    2016-01-01

    Industrial Engineering is one of the departments in Faculty of Industrial Technology. It has more than 200 reshmen in every academic year. However, many students are dropped out because they couldn't complete their study in appropriate time. Variables that influence the drop out case are not yet studied. The objective of this paper is discovering the highest accuracy level between the two methods used, i.e. Naïve Bayesand Support Vector Machines algorithms. The method with the highest accuracy will be discovered from the patterns forms and parameters of every attribute which most influence the students’ length of study period. The result shows that the highest accuracy method is Naïve Bayes Algorithm with accuracy degree of 80.67%. Discussion of this paper emphasizes on the variables that influence the students’ study period.

  11. Band gap modification and ferroelectric properties of Bi0.5(Na,K0.5TiO3-based by Li substitution

    Directory of Open Access Journals (Sweden)

    Ngo Duc Quan

    2014-01-01

    Full Text Available We report on the reduction of band gap in Bi0.5(Na0.82-xLixK0.180.5(Ti0.95Sn0.05O3 from 2.99 eV to 2.84 eV due to the substitutions of Li+ ions to Na+ sites. In addition, the lithium substitution samples exhibit an increasing of the maximal polarizations from 21.8 to 25.7 μC/cm2. The polarization enhancement of ferroelectric and reduction of the band gaps are strongly related to the Li substitution concentration as evaluated via the electronegative between A-site and oxygen and tolerance factor. The results are promising for photovoltaic and photocatalytic applications.

  12. Hybrid aqueous battery based on Na3V2(PO4)3/C cathode and zinc anode for potential large-scale energy storage

    Science.gov (United States)

    Li, Guolong; Yang, Ze; Jiang, Yan; Zhang, Wuxing; Huang, Yunhui

    2016-03-01

    A hybrid aqueous rechargeable battery with Na3V2(PO4)3 as cathode and metal Zn as anode has been proposed. Na3V2(PO4)3 is co-incorporated by carbon and reduced graphene oxide. The battery delivers a capacity of 92 mAh g-1 at a current density of 50 mA g-1 with a high and flat operating voltage of 1.42 V. It exhibits a capacity of 60 mAh g-1 at a high current density of 2000 mA g-1, indicative of excellent rate capability. Such inexpensive and safe battery shows an energy density as high as 112 Wh kg-1, demonstrating that it is potential for future application in large-scale energy storage.

  13. Na(+) doping induced changes in the reduction and charge transport characteristics of Al2O3-stabilized, CuO-based materials for CO2 capture.

    Science.gov (United States)

    Imtiaz, Q; Abdala, P M; Kierzkowska, A M; van Beek, W; Schweiger, S; Rupp, J L M; Müller, C R

    2016-04-28

    Chemical looping combustion (CLC) and chemical looping with oxygen uncoupling (CLOU) are emerging CO2 capture technologies that could reduce appreciably the costs associated with the capture of CO2. In CLC and CLOU, the oxygen required to combust a hydrocarbon is provided by a solid oxygen carrier. Among the transition metal oxides typically considered for CLC and CLOU, copper oxide (CuO) stands out owing to its high oxygen carrying capacity, exothermic reduction reactions and fast reduction kinetics. However, the low Tammann (sintering) temperature of CuO is a serious drawback. In this context, it has been proposed to support CuO on high Tammann temperature and low cost alumina (Al2O3), thus, reducing the morphological changes occurring over multiple CLC or CLOU redox cycles and stabilizing, in turn, the high activity of CuO. However, in CuO-Al2O3 systems, phase stabilization and avoiding the formation of the CuAl2O4 spinel is key to obtaining a material with a high redox stability and activity. Here, we report a Na(+) doping strategy to phase stabilize Al2O3-supported CuO, yielding in turn an inexpensive material with a high redox stability and CO2 capture efficiency. We also demonstrate that doping CuO-Al2O3 with Na(+) improves the oxygen uncoupling characteristics and coke resistance of the oxygen carriers. Utilizing in situ and ex situ X-ray absorption spectroscopy (XAS), the local structure of Cu and the reduction pathways of CuO were determined as a function of the Na(+) content and cycle number. Finally, using 4-point conductivity measurements, we confirm that doping of Al2O3-supported CuO with Na(+) lowers the activation energy for charge transport explaining conclusively the improved redox characteristics of the new oxygen carriers developed. PMID:27080470

  14. Luminescence energy transfer detection of PSA in red region based on Mn2+-enhanced NaYF4:Yb, Er upconversion nanorods.

    Science.gov (United States)

    Zhang, Jianguo; Wang, Shaozhen; Gao, Ni; Feng, Dexiang; Wang, Lun; Chen, Hongqi

    2015-10-15

    A new turn-on luminescence energy transfer (LET) system has been designed for the detection of prostate specific antigen (PSA, a cancer marker) that utilizes Mn(2+)-enhanced long wavelength luminescence NaYF4:Yb, Er upconversion nanorods as the donor and gold nanorods as the acceptor. The Mn(2+)-doped NaYF4:Yb,Er upconversion luminescence nanorods with an emission peak located in the red region were synthesized. The presence of Mn(2+) markedly increased the luminescence intensity over that of the NaYF4:Yb, Er upconversion nanomaterials (excited by a 980 nm continuous wavelength laser). The surfaces of Mn(2+)-doped NaYF4:Yb, Er upconversion nanorods were modified with poly(acrylic acid). Antibodies against prostate specific antigen were bound to the surface of the carboxyl-functionalized upconversion nanorods, which acted as the energy donor in this LET system. Gold nanorods with an absorption band at ~666 nm were synthesized by the seed growth method, acted as the energy acceptor. The emission band of the upconversion nanorods overlapped well with the absorption band of the gold nanorods. The luminescence was quenched because of the electrostatic interactions that shortened the distance between the donor (negatively charged) and the accepter (positively charged).When the PSA antigen was added into the system, the energy acceptor and the energy donors were separated because the binding affinity between PSA and anti-PSA was greater than the electrostatic interactions, and thereby the luminescence was recovered. The linear range of detecting PSA was from 0.1172 to 18.75 ng/mL (R=0.995), with a limit of detection for PSA as low as 0.1129 ng/mL. The method was successfully applied to the sensing of PSA in human serum samples. PMID:25996781

  15. Dehydrogenation kinetics, reversibility, and reaction mechanisms of reversible hydrogen storage material based on nanoconfined MgH2-NaAlH4

    Science.gov (United States)

    Plerdsranoy, Praphatsorn; Meethom, Sukanya; Utke, Rapee

    2015-12-01

    Studies of dehydrogenation kinetics, reversibility, and reaction mechanisms during de/rehydrogenation of nanoconfined MgH2-NaAlH4 into carbon aerogel scaffold (CAS) for reversible hydrogen storage material are for the first time proposed. Two different MgH2:NaAlH4 molar ratios (1:1 and 2:1) of hydride composite are melt infiltrated into CAS under 1:1 (CAS:hydride composite) weight ratio. Successful nanoconfinement is confirmed by N2 adsorption-desorption. Multiple-step dehydrogenation of milled samples is reduced to two-step reaction due to nanoconfinement. Peak temperatures corresponding to main dehydrogenation of nanoconfined samples significantly reduce as compared with those of milled samples, i.e., ∆T=up to 50 and 34 °C for nanoconfined sample with 1:1 and 2:1 (MgH2:NaAlH4) molar ratios, respectively. Hydrogen content released (the 1st cycle) and reproduced (the 2nd, 3rd, and 4th cycles) of nanoconfined samples enhance up to 80% and 68% with respect to theoretical hydrogen storage capacity, respectively, while those of milled samples are 71% and 38%, respectively. Remarkable hydrogen content reproduced after nanoconfinement is due to the fact that metallic Al obtained after dehydrogenation (T=300 °C under vacuum) of nanoconfined samples prefer to react with MgH2 and produces Al12Mg17, favorable for reversibility of MgH2-NaAlH4 system, whereas that of milled samples stays in the form of unreacted Al under the same temperature and pressure condition.

  16. A novel Ni/Na - Containing inorganic-organic hybrid supramolecule based on polyoxometalate and EDTA with ultraviolet-visible light photochromism

    Science.gov (United States)

    Xiao, Han-Xi; Teng, Chun-Lin; Cai, Qing; Sun, Su-Qin; Cai, Tie-Jun; Deng, Qian

    2016-08-01

    A novel Ni/Na - containing inorganic-organic hybrid supramolecule {(PW12O40)·[Na2(NiH2EDTA·H2O)(H4EDTA)·2H2O]·2H2O·H3O}n (short for NiEDTA-PW12) has been successfully synthesized by solution method, and investigated by thermogravimetric-differential thermal analysis (TG-DTA), ultraviolet visible (UV-Vis) spectroscopy, cyclic voltammetry (CV), photoluminescence (PL), ultraviolet visible diffuse reflectance spectrum (UV-vis DRS) and single-crystal X-ray diffraction (XRD). NiEDTA-PW12 exhibits intriguing infinite supramolecular structure with Na+ ions as linker. Furthermore, NiEDTA-PW12 displays a fast-responsive reversible photochromism under ultraviolet or visible light. The photochromic property of NiEDTA-PW12 has been investigated by techniques of UV-vis DRS and PL, and the impact of the O2 on fading of the colored NiEDTA-PW12 has been investigated.

  17. The NA62 trigger system

    International Nuclear Information System (INIS)

    The main aim of the NA62 experiment (NA62 Technical Design Report, 〈http://na62.web.cern.ch/NA62/Documents/TDFulldocv1.pdf〉 [1]) is to study ultra-rare Kaon decays. In order to select rare events over the overwhelming background, central systems with high-performance, high bandwidth, flexibility and configurability are necessary, that minimize dead time while maximizing data collection reliability. The NA62 experiment consists of 12 sub-detector systems and several trigger and control systems, for a total channel count of less than 100,000. The GigaTracKer (GTK) has the largest number of channels (54,000), and the Liquid Krypton (LKr) calorimeter shares with it the largest raw data rate (19 GB/s). The NA62 trigger system works with 3 trigger levels. The first trigger level is based on a hardware central trigger unit, so-called L0 Trigger Processor (L0TP), and Local Trigger Units (LTU), which are all located in the experimental cavern. Other two trigger levels are based on software, and done with a computer farm located on surface. The L0TP receives information from triggering sub-detectors asynchronously via Ethernet; it processes the information, and then transmits a final trigger decision synchronously to each sub-detector through the Trigger and Timing Control (TTC) system. The interface between L0TP and the TTC system, which is used for trigger and clock distribution, is provided by the Local Trigger Unit board (LTU). The LTU can work in two modes: global and stand-alone. In the global mode, the LTU provides an interface between L0TP and TTC system. In the stand-alone mode, the LTU can fully emulate L0TP and so provides an independent way for each sub-detector for testing or calibration purposes. In addition to the emulation functionality, a further functionality is implemented that allows to synchronize the clock of the LTU with the L0TP and the TTC system. For testing and debugging purposes, a Snap Shot Memory (SSM) interface is implemented, that can work

  18. Influence of Na2O/Al2O3 and SiO2/Al2O3 ratios on the immobilization of Pb from electric arc furnace into the fly ash based geopolymers

    Directory of Open Access Journals (Sweden)

    Zejak R.

    2013-04-01

    Full Text Available Electric arc furnace dust (EAFD is by-product of iron and steel scrap remelting in electric arc furnace. This waste is classified as a hazardous material due to the leaching of heavy metals into the environment. Geopolymeryzation of fly ash into construction materials called - geopolymer is a considering as a possible way of immobilization of heavy metals from EAFD. Mechanical properties and chemical stability of geopolymers are mostly determined by the ratio between main oxides, Na2O, Al2O3 and SiO2. In this paper we have investigated possibility of Pb immobilization from EAFD into the fly ash based geopolymer. Geopolymers are synthesized at different Na2O/Al2O3 and SiO2/Al2O3 ratios. Compressive strength and chemical stability of geopolymers with respect to the leaching of Pb in water according to the EN 12457 regulation were tested. The results have shown that Na2O/Al2O3 and SiO2/Al2O3 ratios have influence on the compressive strength of geopolymers and Pb release in the water environment.

  19. Bulk modulus of basic sodalite, Na8[AlSiO4]6(OH)2·2H2O, a possible zeolitic precursor in coal-fly-ash-based geopolymers

    KAUST Repository

    Oh, Jae Eun

    2011-01-01

    Synthetic basic sodalite, Na8[AlSiO4] 6(OH)2•2H2O, cubic, P43n, (also known as hydroxysodalite hydrate) was prepared by the alkaline activation of amorphous aluminosilicate glass, obtained from the phase separation of Class F fly ash. The sample was subjected to a process similar to geopolymerization, using high concentrations of a NaOH solution at 90 °C for 24 hours. Basic sodalite was chosen as a representative analogue of the zeolite precursor existing in Na-based Class F fly ash geopolymers. To determine its bulk modulus, high-pressure synchrotron X-ray powder diffraction was applied using a diamond anvil cell (DAC) up to a pressure of 4.5 GPa. A curve-fit with a truncated third-order Birch-Murnaghan equation of state with a fixed K\\'o = 4 to pressure-normalized volume data yielded the isothermal bulk modulus, K o = 43 ± 4 GPa, indicating that basic sodalite is more compressible than sodalite, possibly due to a difference in interactions between the framework host and the guest molecules. © 2010 Elsevier Ltd.

  20. Reflexões sobre as bases conceituais que fundamentam a construção do conhecimento acerca da lombalgia na gestação Reflexiones sobre las bases conceptuales que fundamentan la construcción del conocimiento a cerca de la lumbalgia en el embarazo Low back pain in pregnancy in the perspective of the biomedical model: a critical analysis

    OpenAIRE

    Cristine Homsi Jorge Ferreira; Ana Márcia Spanó Nakano

    2001-01-01

    A lombalgia na gestação acomete cerca de 50% das gestantes, causando importantes transtornos sociais. Apesar disso, ela vem sendo considerada como uma ocorrência normal e até esperada na gravidez, o que tem contribuído para a falta de adoção de medidas profiláticas e de alívio. Buscamos neste trabalho compreender as bases conceituais históricas que originaram esta naturalização, usando como recorte a obstetrícia e como referência a literatura mundial sobre o tema indexada de 1987 à 1997. Apre...

  1. Gestão do Conhecimento – GC – como recurso estratégico e fonte de Vantagem Competitiva Sustentável – VCS – na perspectiva Resource-based view – RBV – Knowledge Management – KM – used as a strategic resource and source of Sustainable Competitive Advantage – SCA – in the Resource-based view – RBV –

    OpenAIRE

    Virginia Aparecida Castro; Edison Mello Júnior; Rogério Melo Costa Pinto

    2012-01-01

    A Gestão do Conhecimento – GC – busca integrar toda a organização ao conhecimento que pode ser criado, compartilhado e armazenado. Desta forma, este trabalho tem por objetivo evidenciar de que maneira a GC é utilizada como recurso estratégico e fonte de Vantagem Competitiva Sustentável – VCS – na perspectiva Resource based view – RBV –. É feito um levantamento na forma de censo junto aos alunos das turmas de pós-graduação lato sensu (MBA) da FAGEN – Faculdade de Gestão e Negócios – da UFU – U...

  2. Nação e nacionalismo a partir da experiência brasileira Nation and nationalism based on the Brazilian experience

    Directory of Open Access Journals (Sweden)

    Carlos Lessa

    2008-04-01

    Full Text Available Pensar nação e nacionalismo a partir da experiência brasileira exige um mergulho desde as raízes coloniais até a modernidade. Essa trajetória é marcada por descompassos, e desde o Estado Nacional até a sedimentação da nação e o sentimento de auto-estima com uma "identidade brasileira" transcorre-se mais de um século. Tanto o conceito de Brasil-nação quanto as versões nacionalistas jamais têm alta dramaticidade; as passagens históricas fundamentais - abolição, proclamação da República, Estado Novo - se sucedem com poucos traumas preliminares e, em seqüência, a trajetória opera uma rápida "conservatização". Do ponto de vista econômico, as forças produtivas se desenvolvem dinâmica e intensamente. Apesar da expansão demográfica, da ocupação territorial, da transformação e emergência de novos grupos sociais no campo e na cidade, é preservada a exclusão social de amplas frações da nacionalidade dos benefícios do dinamismo econômico. É ciclotímica a leitura dos nacionais de suas próprias características. A cultura, tanto das elites quanto a popular, fornece chaves para entender as mutações do pensar nacional em relação ao Brasil e o desdobramento de múltiplas características.This essay aims to analyze both Nation and Nationalism concepts according to the viewpoint of brazilian experience, from colonial roots to our times, from national state’s birth to the settlement of the Nation and national self-stee. The main historical landmarks happen with few preliminary traumas and are "conservative-zed". Productive forces develop dynamically; demographic expansion and territory occupation continue as society changes and new groups emerge; however, large population segments keep excluded from the welfare economic development should provide. Natives' self-perception is rather cyclothymical. Both popular and elite’s culture provide the keys to understand the mutations of national thinking about Brazil, as

  3. HIV-1 Antiretroviral Drug Resistance Mutations in Treatment Naïve and Experienced Panamanian Subjects: Impact on National Use of EFV-Based Schemes.

    Science.gov (United States)

    Mendoza, Yaxelis; Castillo Mewa, Juan; Martínez, Alexander A; Zaldívar, Yamitzel; Sosa, Néstor; Arteaga, Griselda; Armién, Blas; Bautista, Christian T; García-Morales, Claudia; Tapia-Trejo, Daniela; Ávila-Ríos, Santiago; Reyes-Terán, Gustavo; Bello, Gonzalo; Pascale, Juan M

    2016-01-01

    The use of antiretroviral therapy in HIV infected subjects prevents AIDS-related illness and delayed occurrence of death. In Panama, rollout of ART started in 1999 and national coverage has reached 62.8% since then. The objective of this study was to determine the level and patterns of acquired drug resistance mutations of clinical relevance (ADR-CRM) and surveillance drug resistance mutations (SDRMs) from 717 HIV-1 pol gene sequences obtained from 467 ARV drug-experienced and 250 ARV drug-naïve HIV-1 subtypes B infected subjects during 2007-2013, respectively. The overall prevalence of SDRM and of ADR-CRM during the study period was 9.2% and 87.6%, respectively. The majority of subjects with ADR-CRM had a pattern of mutations that confer resistance to at least two classes of ARV inhibitors. The non-nucleoside reverse transcriptase inhibitor (NNRTI) mutations K103N and P225H were more prevalent in both ARV drug-naïve and ARV drug-experienced subjects. The nucleoside reverse transcriptase inhibitor (NRTI) mutation M184V was more frequent in ARV drug-experienced individuals, while T215YFrev and M41L were more frequent in ARV drug-naïve subjects. Prevalence of mutations associated to protease inhibitors (PI) was lower than 4.1% in both types of subjects. Therefore, there is a high level of resistance (>73%) to Efavirenz/Nevirapine, Lamivudine and Azidothymidine in ARV drug-experienced subjects, and an intermediate to high level of resistance (5-10%) to Efavirenz/Nevirapine in ARV drug-naïve subjects. During the study period, we observed an increasing trend in the prevalence of ADR-CRM in subjects under first-line schemes, but not significant changes in the prevalence of SDRM. These results reinforce the paramount importance of a national surveillance system of ADR-CRM and SDRM for national management policies of subjects living with HIV. PMID:27119150

  4. HIV-1 Antiretroviral Drug Resistance Mutations in Treatment Naïve and Experienced Panamanian Subjects: Impact on National Use of EFV-Based Schemes

    Science.gov (United States)

    Mendoza, Yaxelis; Castillo Mewa, Juan; Martínez, Alexander A.; Zaldívar, Yamitzel; Sosa, Néstor; Arteaga, Griselda; Armién, Blas; Bautista, Christian T.; García-Morales, Claudia; Tapia-Trejo, Daniela; Ávila-Ríos, Santiago; Reyes-Terán, Gustavo; Bello, Gonzalo; Pascale, Juan M.

    2016-01-01

    The use of antiretroviral therapy in HIV infected subjects prevents AIDS-related illness and delayed occurrence of death. In Panama, rollout of ART started in 1999 and national coverage has reached 62.8% since then. The objective of this study was to determine the level and patterns of acquired drug resistance mutations of clinical relevance (ADR-CRM) and surveillance drug resistance mutations (SDRMs) from 717 HIV-1 pol gene sequences obtained from 467 ARV drug-experienced and 250 ARV drug-naïve HIV-1 subtypes B infected subjects during 2007–2013, respectively. The overall prevalence of SDRM and of ADR-CRM during the study period was 9.2% and 87.6%, respectively. The majority of subjects with ADR-CRM had a pattern of mutations that confer resistance to at least two classes of ARV inhibitors. The non-nucleoside reverse transcriptase inhibitor (NNRTI) mutations K103N and P225H were more prevalent in both ARV drug-naïve and ARV drug-experienced subjects. The nucleoside reverse transcriptase inhibitor (NRTI) mutation M184V was more frequent in ARV drug-experienced individuals, while T215YFrev and M41L were more frequent in ARV drug-naïve subjects. Prevalence of mutations associated to protease inhibitors (PI) was lower than 4.1% in both types of subjects. Therefore, there is a high level of resistance (>73%) to Efavirenz/Nevirapine, Lamivudine and Azidothymidine in ARV drug-experienced subjects, and an intermediate to high level of resistance (5–10%) to Efavirenz/Nevirapine in ARV drug-naïve subjects. During the study period, we observed an increasing trend in the prevalence of ADR-CRM in subjects under first-line schemes, but not significant changes in the prevalence of SDRM. These results reinforce the paramount importance of a national surveillance system of ADR-CRM and SDRM for national management policies of subjects living with HIV. PMID:27119150

  5. KURIKULUM IZOBRAZBE ANDRAGOGA NA PRIMJERU USTROJA NJIHOVE IZOBRAZBE U NJEMAČKOJ - CURRICULUMS FOR ANDRAGOGY TRAINING BASED ON ANDRAGOGY TRAINING IN GERMANY

    OpenAIRE

    Prgomet, Anto

    2015-01-01

    Polazište ovog rada je prisutna diskrepancija u području obrazovanja odraslih. Naglašavanje važnosti obrazovanja odraslih u životu pojedinca i društvene zajednice općenito kao i zahtjeva za kvalitetnim obrazovnim okvirom za obrazovanje odraslih te kompetentnosti djelatnika u njemu ne prati proces njihove profesionalizacije. Profesionalna sveučilišna izobrazba andragoga je, iako ne jedini, to svakako temeljni element tog procesa. U tekstu se analiziraju aktualni ustroji magistarskog studija...

  6. Electrochemical corrosion studies on copper-base waste package container materials in unirradiated 0.1 N NaNO3 at 95 degrees C

    International Nuclear Information System (INIS)

    Three candidate materials were investigated in this study in terms of their electrochemical corrosion behavior in unirradiated 0.1 N NaNO3 solutions at 95 degrees C. Anodic polarization experiments were conducted to determine the passive current densities, pitting potentials, and other parameters, together with Cyclic Current Reversal Voltammetry tests to evaluate the stability and protectiveness of the passive oxides formed. X-ray diffraction and Auger Electron Spectroscopy were used for identification of the corrosion products as well as Scanning Electron Microscopy for the surface morphology studies. 2 refs., 22 figs., 2 tabs

  7. Avaliação do Índice de Remanescente Adesivo utilizando braquetes com e sem tratamento na base e a interação com três sistemas de colagem Evaluation of Adhesive Remnant Index using conventional mesh bases and sandblasted orthodontic bracket bases and three bonding systems

    Directory of Open Access Journals (Sweden)

    Lilian Maria Brisque Pignatta

    2009-02-01

    Full Text Available OBJETIVO: avaliar o Índice de Remanescente Adesivo (IRA em dentes bovinos após a descolagem de braquetes com e sem tratamento na base. METODOLOGIA: foram utilizados três sistemas de colagem ortodôntica para os dois padrões de base. Os dentes bovinos foram divididos em seis grupos de 40, de acordo com a base do braquete e o sistema de colagem. Vinte e quatro horas após a colagem foram realizados os testes de compressão em uma máquina de ensaios. A avaliação do IRA foi realizada em um estereomicroscópio por três examinadores calibrados. Foi utilizado o teste não paramétrico de Kruskal-Wallis, seguido do método de Dunn, para fazer as comparações múltiplas entre todos os grupos. RESULTADOS E CONCLUSÕES: observou-se que o tratamento das bases dos braquetes com óxido de alumínio não foi determinante para o aumento da adesividade entre o braquete e o adesivo. O grupo em que se utilizou braquetes com tratamento na base e adesivo TXT (3M-Unitek + Transbond Plus SEP (3M-Unitek apresentou a maior parte das fraturas na interface dente-adesivo (escore 4.AIM: To assess the Adhesive Remnant Index (ARI in bovine teeth after debonding mesh bases and sandblasted orthodontic bracket bases. METHODS: Were used three bonding systems for the two standards of base. The bovine teeth were divided into 6 groups of 40, according to the bracket base and to the bonding system. Twenty four hours after bonding they had been carried through shear bond strength tests in a universal testing machine. The assessment of ARI was performed in a stereomicroscopy by three calibrated examiners. It was used the non-parametric Kruskall-Wallis test, followed by Dunn's method, to do the multiple comparisons among all groups. RESULTS AND CONCLUSIONS: It was observed that the aluminum oxide sandblasting bracket bases was not determinative to the increase of the adhesiveness between bracket and adhesive. The group where it was used sandblasted orthodontic bracket bases and

  8. 钠硫电池储能系统的电价机制研究%Research on Electricity Pricing Mechanism of NaS Battery Based Energy Storage System

    Institute of Scientific and Technical Information of China (English)

    孙波; 廖强强; 陆宇东; 周国定; 陈飞杰; 葛红花

    2014-01-01

    A cost-benefit analysis model of NaS battery based energy storage system was established to study the electricity pricing mechanism during load shifting of power grid. The energy storage pricing strategies under three electricity pricing mechanisms, namely the capacity pricing mechanism, the energy pricing mechanism and the two-part electricity pricing mechanism, were discussed. Research results show that the energy pricing mechanism and the two-part electricity pricing mechanism are more suitable for the NaS battery based energy storage system than the energy pricing mechanism. Along with the reduction of specific energy construction cost for NaS battery based energy storage system from 3 000 RMB/kWh to 1 000 RMB/kWh, the discharge price of NaS battery based energy storage system, which is set by the energy pricing mechanism and the two-part electricity pricing mechanism, could be controlled to about 1 RMB/kWh, thus it may possess the elementary capability to compete with the Shanghai industrial and commercial electricity price in peak periods.%采用成本收益模型研究了钠硫电池储能系统在电网削峰填谷作用中的电价机制。从单一容量电价、单一电度电价、两部制电价3种电价机制讨论了固定投资回报期下的储能电价策略。研究结果表明,对于能量型的钠硫电池储能系统,采用单一容量电价机制来制定储能电价不太合适,而采用单一电度电价和两部制电价机制则更为合适。随着钠硫电池储能系统单位能量建设成本从3000元/kW·h降至1000元/kW·h,采用单一电度电价和两部制电价机制制定的放电电价可控制在1元/kW·h左右,初步具备了与上海工商业高峰时段电度电价竞争的优势。

  9. Wybrane cechy ruchu turystycznego w Słowińskim Parku Narodowym na podstawie badań ankietowych = The selected elements of the tourist activity in the Slowinski National Park in the base of the questionnaire survey

    OpenAIRE

    Parzych, Krzysztof

    2014-01-01

    Parzych Krzysztof. Wybrane cechy ruchu turystycznego w Słowińskim Parku Narodowym na podstawie badań ankietowych = The selected elements of the tourist activity in the Slowinski National Park in the base of the questionnaire survey. Journal of Health Sciences. 2014;4(13):246-256. ISSN 1429-9623 / 2300-665X. http://journal.rsw.edu.pl/index.php/JHS/article/view/2014%3B4%2813%29%3A246-256 http://www.ojs.ukw.edu.pl/index.php/johs/article/view/2014%3B4%2813%29%3A246-256 https://pbn.nau...

  10. Multilayer passive shielding of scintillation detectors based on BGO, NaI(Tl), and stilbene crystals operating in intense neutron fields with an energy of 14.1 MeV

    Science.gov (United States)

    Bystritsky, V. M.; Valkovic, V.; Grozdanov, D. N.; Zontikov, A. O.; Ivanov, I. Zh.; Kopatch, Yu. N.; Krylov, A. R.; Rogov, Yu. N.; Ruskov, I. N.; Sapozhnikov, M. G.; Skoy, V. R.; Shvetsov, V. N.

    2015-03-01

    We discuss the issues related to choosing the optimum type of passive shielding of scintillation detectors based on BGO, NaI(Tl), and stilbene crystals from the direct penetration of neutron radiation with an energy of 14.1 MeV that was emitted isotropically into a solid angle of 4π. A series of experimental measurements of the count-rate suppression factor that may be obtained for the indicated detectors through the use of various shielding filters comprising iron, lead, and borated polyethylene layers with a total thickness not exceeding 50 cm are conducted.

  11. Incremento na dissolução da caffeine em base de ammonium acryloyldimethyltaurate/vp copolymer: desenvolvimento farmacotécnico de géis anti-celulite

    OpenAIRE

    Éder Menezes Fernandes; Gabriel Azevedo de Brito Damasceno; Márcio Ferrari; Eduardo Pereira de Azevedo

    2015-01-01

    A hidrolipodistrofia ginóide (HLDG), popularmente conhecida como “celulite”, consiste em uma alteração patológica do tecido adiposo e da função veno-linfática. Géis contendo caffeine tem sido empregados no tratamento não-invasivo da HLDG, oferecendo resultados satisfatórios a baixos custos. Devido a baixa hidrossolubilidade da caffeine, este gel apresenta como principal inconveniente a formação de precipitados/grumos, oriundos da precipitação da caffeine na base hidrofílica (gel). Este trabal...

  12. A study on equilibria in the quaternary system Na2 B4 O7-Na2 SO4-NaCl-H2 O at 288 K%Na2B4O7-Na2SO4-NaCl-H2O四元体系288K相平衡研究

    Institute of Scientific and Technical Information of China (English)

    桑世华; 赵相颇; 钟丝摇; 张俊杰

    2013-01-01

    Solubilities and densities of solution in the quaternary system NaCl-Na2 SO4-Na2 B4 O7-H2 O at 288 K were studied by iso-thermal equilibrium method.Based on the solubility data ,the phase diagram of the quaternary system was plotted ,which consists of three univariant curves,one invariant point and three crystallization fields corresponding to NaCl ,Na2B4O7· 10H2O and Na2SO4· 10H2O.The experimental results show that sodium chloride (NaCl)had the salting-out effect on sodium borate(Na2B4O7)and sodi-um sulphate(Na2SO4).%  采用等温溶解平衡法研究了四元体系Na2 B4 O7-Na2 SO4-NaCl-H2 O 在288 K的相平衡关系,测定了平衡液相的溶解度及其密度。由研究结果知该四元体系为简单共饱和型,无复盐及固溶体形成。根据实验数据绘制了相应的相图。相图中有一个共饱点,三条单变曲线,三个结晶区平衡固相分别为:Na2 B4 O7·10H2 O, Na2 SO4·10H2 O和NaCl。实验结果表明NaCl对Na2 B4 O7和Na2 SO4有盐析作用,并简要讨论了实验结果。

  13. Automated quantitative analysis of in-situ NaI measured spectra in the marine environment using a wavelet-based smoothing technique

    International Nuclear Information System (INIS)

    An algorithm for automated analysis of in-situ NaI γ-ray spectra in the marine environment is presented. A standard wavelet denoising technique is implemented for obtaining a smoothed spectrum, while the stability of the energy spectrum is achieved by taking advantage of the permanent presence of two energy lines in the marine environment. The automated analysis provides peak detection, net area calculation, energy autocalibration, radionuclide identification and activity calculation. The results of the algorithm performance, presented for two different cases, show that analysis of short-term spectra with poor statistical information is considerably improved and that incorporation of further advancements could allow the use of the algorithm in early-warning marine radioactivity systems. - Highlights: → Algorithm for automated analysis of in-situ NaI γ-ray marine spectra. → Wavelet denoising technique provides smoothed spectra even at parts of the energy spectrum that exhibits strong statistical fluctuations. → Automated analysis provides peak detection, net area calculation, energy autocalibration, radionuclide identification and activity calculation. → Analysis of short-term spectra with poor statistical information is considerably improved.

  14. Análisis del proceso de minería de datos sobre la base de datos Bioinformática de segmentos de la proteína p53, asociada a la actividad cancerígena

    Directory of Open Access Journals (Sweden)

    Franco Simonetti

    2011-03-01

    Full Text Available Se estudió la utilización de estrategias para afrontar el problema del desbalanceo y la alta dimensionalidad de los registros que habitualmente forman parte de las bases de datos en el área bioinformática. Se tomó como caso de estudio la base de datos de segmentos de la proteína p53; sobre dicha base se construyen modelos con el fin de identificar si corresponden a patrones activos o inactivos. El problema del desbalanceo se abordó a través de una red neuronal no supervisada, y el de la selección de variables para reducir la alta dimensionalidad, a partir de una combinación de métodos con diferentes enfoques. Experimentos preliminares del modelo propuesto en datos estándar muestran resultados promisorios.

  15. Formulação estratégica da manutenção industrial com base na confiabilidade dos equipamentos Strategic formulation of industrial maintenance supported by equipment's reliability

    Directory of Open Access Journals (Sweden)

    Miguel Afonso Sellitto

    2005-04-01

    Full Text Available Este trabalho relata o uso da confiabilidade e da manutenibilidade na formulação de estratégias de manutenção industrial. O método utilizado foi o estudo de dois casos. Inicia-se revisando conceitos ligados a variáveis e processos aleatórios como base para definir conceitos e características de estudos de confiabilidade e de modelagem aplicados na gestão da manutenção industrial. A seguir se descrevem os casos estudados, em que se aplicam técnicas de modelagem de tempos até a falha e até o reparo no estabelecimento de estratégias de manutenção em fábricas do setor metal-mecânico. Com base nos resultados, discute-se o caso, estabelecendo condições para o uso da confiabilidade na formulação estratégica da manutenção, principalmente quanto ao sistema de informações necessárias.This paper reports the use of reliability and maintainability assessments in the strategic formulation of industrial maintenance. The method was a double case study. The paper begins by a theoretical review of related concepts of stochastic variables and processes as a basis to address concepts and features from reliability studies and modeling, suited to use in managing the industrial maintenance. One then describes the two studied cases, in which the reliability techniques were applied, in modeling the times to failure and times to the repair for the sake of settling the strategic formulation of industrial maintenance in metal-mechanic plants. Supported by results, this paper discusses the cases, arising requirements to the use of the reliability, mainly related to the information system.

  16. Crescimento da base craniana nos diferentes tipos faciais nos relacionamentos maxilomandibulares ortopédicos de Classe I, II e III: Parte 2 (Crescimento médio de Ba-Na, CC-Na e CC-Ba) Cranial base growth in different facial types in Class I, II and III orthopedic maxillomandibular relationship: Part 2 (Mean growth of Ba-Na, CC-Na and CC-Ba)

    OpenAIRE

    Lucelma Vilela Pieri; Kurt Faltin Junior; Cristina Lúcia Feijó Ortolani; Rolf Marçon Faltin; Márcia Aparecida Alves de Almeida

    2007-01-01

    OBJETIVO: este estudo retrospectivo avaliou o crescimento médio da base craniana nos diferentes tipos faciais e de relacionamentos maxilomandibulares ortopédicos.METODOLOGIA: uma amostra aleatória de 300 pacientes brasileiros leucodermas (131 do gênero masculino, 169 do gênero feminino), com idade média inicial de 10 anos e 2 meses (dentadura mista) e final de 14 anos e 8 meses (segundos molares em oclusão) e tempo médio de observação de 4 anos e 5 meses, foi selecionada em uma clínica partic...

  17. Envolvimento Parental na Escola

    OpenAIRE

    Alves, Marta Raquel Garcia; Rolim, Luísa

    2011-01-01

    O nosso estudo teve como objectivo verificar se existe envolvimento parental na Escola Básica Integrada com Jardim de Infância de Góis. Nesta análise foram questionados alguns alunos dos 7º e 9º anos, encarregados de educação e docentes dos referidos alunos. A nossa amostra contou com a participação de 115 indivíduos sendo 67 alunos 31 encarregados de educação e 17 docentes. Na recolha dos dados usamos o Questionário de Envolvimento Parental na Escola de Pereira (2002), com Versão para pais e...

  18. FOTOALERGIJSKE REAKCIJE NA LIJEKOVE

    OpenAIRE

    Bukvić Mokos, Zrinka; Lipozenčić, Jasna

    2011-01-01

    Reakcije na lijekove posredovane svjetlom mogu biti fototoksične i fotoalergijske. U ovom preglednom članku prikazane su fotoalergijske reakcije na lijekove koje nastaju interakcijom lijeka i ultraljubičastog svjetla uz sudjelovanje imunosnih mehanizama. Uz osvrt na fotobiologiju te najčešće lijekove koji sudjeluju u nastanku fotoalergijskih reakcija, prikazana je imunološkapodloga tih dermatoza, klinička slika, te dijagnostički i terapijski postupak. Poznavanje potencijalnih fotoalergena i p...

  19. EROTIČNA RISBA

    OpenAIRE

    LAZAR, FORTUNA

    2009-01-01

    Diplomsko delo z naslovom »Erotična risba« je sestavljeno iz teoretičnega in praktičnega dela, pri čemer je praktični del vsebinsko vezan na teoretični del diplomske naloge. Neposredna erotična upodobitev je del likovne produkcije večine umetnikov. V raziskovanju erotičnih upodobitev sem izpostavila dva umetnika, Egona Schieleja, ki je ustvaril pomemben opus erotične figuralike in Marlene Dumas, še živečo umetnico, ki skozi erotične podobe izraža aktualne teme sodobnosti. Namen tega diplomske...

  20. PRIPRAVE NA POSLOVNI NASTOP

    OpenAIRE

    Grušovnik, Nataša

    2010-01-01

    V sodobnem svetu se že skoraj na vsakem delovnem mestu srečamo s poslovno komunikacijo in raznimi predstavitvami poslovnih projektov, izdelkov ali storitev, zato je pomembno, da se za nastop primerno pripravimo in usposobimo. V tem diplomskem delu je predstavljeno poslovno komuniciranje, čigar namen je doseganje določenih ciljev, med katere zagotovo spada uspešen javni nastop ali predstavitev. Predstavljen je način, kako se lahko posameznik z učinkovitim usposabljanjem in pripravo na nastop z...

  1. Djelovanje eksplozija na konstrukcije

    OpenAIRE

    Draganić, Hrvoje; Sigmund, Vladimir

    2012-01-01

    Dana je analiza opterećenja eksplozijom na konstrukciju te numerički primjer djelovanja na fiktivnu građevinu. Cilj je bio upoznati se s fenomenom eksplozije kao opterećenja na konstrukcije uslijed sve veće terorističke prijetnje te nedostatka smjernica u nacionalnim i europskim propisima o provjeri konstrukcija izloženih djelovanju eksplozija. Analitički je određeno opterećenje eksplozijom kao vremenski zapis promjene tlaka zraka te numerički modeliranja konstrukcija i prethodno određeno opt...

  2. CRKVA SIGURATA NA PRIJEKOM

    OpenAIRE

    Peković, Željko

    1997-01-01

    Crkva Sigurata na Prije kom teško je oštećena prilikom agresije Srba, Crnogoraca i JNA na Dubrovnik 1991. i 1992. godine. Prilikom radova na obnovi i restauraciji , 1993. - 1994. godine, crkva je temeljito istražena. Autor donosi rezultate istraživanja i njihovo tumačenje kroz prostorni razvoj građevine. Istraživanja su upotpunila i produbila znanja o predromaničkoj građevini , te njenih pregradnja i dogradnja tijekom XVI. i XVII. stoljeća . Istraživanja su ustvrdila postojanje ostataka dviju...

  3. Precarização do trabalho e risco de acidentes na construção civil: um estudo com base na Análise Coletiva do Trabalho (ACT Work precariousness and risk of accidents in civil construction: a study based on the Collective Work Analysis

    Directory of Open Access Journals (Sweden)

    Mara Alice Batista Conti Takahashi

    2012-12-01

    Full Text Available Este artigo descreve a atividade e a percepção dos trabalhadores da construção civil sobre os riscos e a carga de trabalho. O estudo, com base na Análise Coletiva de Trabalho (ACT, é parte de pesquisa em políticas públicas para aprimoramento do Sistema de Vigilância em Acidentes de Trabalho (SIVAT de Piracicaba-SP. Priorizou-se a construção civil pela magnitude epidemiológica de ocorrência de acidentes de trabalho e a baixa eficácia das ações tradicionais de vigilância pelas características de informalidade, terceirização e rotatividade do setor. Os trabalhadores revelaram elevada percepção dos riscos de acidentes e que as medidas de segurança dificultam ou impedem a realização do trabalho. Os achados questionam a eficácia dos treinamentos para adesão às medidas de segurança e evidenciam a necessidade de uma pedagogia transformadora nas ações de promoção da saúde e prevenção dos acidentes de trabalho.This paper aims to describe the construction workers' activities, as well as their perceptions about risks and workload. The study, based on the Collective Work Analysis, is part of a broader public policies project for the improvement of SIVAT (Surveillance System of Work Accidents - in the city of Piracicaba (Southeastern Brazil. Civil construction was prioritized given the epidemiological magnitude of the occurrence of work accidents and the limited efficacy of traditional surveillance initiatives in this sector due to informal employment practices, outsourcing, high staff turnover, etc. The workers have a high level of awareness concerning the risk of accidents, but they believe that the main preventive measures hinder or even make it impossible for them to carry out the tasks. Our findings question the efficacy of traditional training for adherence to safety practices, thus highlighting the need for a transformative pedagogy for preventive practices and the health promotion of workers.

  4. Impacto da atividade física na qualidade de vida de mulheres de meia idade: estudo de base populacional Impact of physical activity on quality of life in middle-aged women: a population based study

    Directory of Open Access Journals (Sweden)

    Ana Katherine da Silveira Gonçalves

    2011-12-01

    Full Text Available OBJETIVO: Avaliar o impacto da prática de atividade física na qualidade de vida de mulheres de meia idade. MÉTODOS: Estudo de base populacional e corte transversal, que incluiu uma amostra estratificada de 370 mulheres de meia idade entre 40 a 65 anos, recrutadas a partir de uma população de 20.801 mulheres atendidas no período de um ano nas redes básicas de saúde, inseridas nos quatro distritos (Norte, Sul, Leste e Oeste que compõem o sistema de saúde da cidade de Natal, Rio Grande do Norte, de junho a setembro de 2011. O cálculo da amostra teve por base um nível de confiança de 95%, com poder do teste de 80%, erro de estimativa de 5% e considerou-se a proporção de pacientes classificadas com qualidade de vida adequada (indicador >26 da amostra piloto. Os dados foram coletados enquanto as mulheres aguardavam na sala de espera para a consulta de rotina. Para avaliar a qualidade de vida geral, utilizou-se a versão abreviada do WHOQOL (WHOQOL-Bref-WHO Quality of Life - BREF, e sua relação com os sintomas do climatério foi avaliada por meio do Menopause Rating Scale (MRS. O nível de atividade física foi avaliado pelo questionário International Physical Activity Questionnaire (IPAQ, versão curta, semana usual. Para obter-se a classificação dos níveis de atividade física, utilizaram-se três categorias: sedentária, moderadamente ativa e muito ativa. A análise estatística foi realizada utilizando o programa estatístico Minitab, versão 16. RESULTADOS: A média de idade das mulheres foi de 49,8 anos (±8.1, foram predominantemente caucasianas (72,7%, casadas (61,6%, não fumantes (93,5% e com o Ensino Médio completo (47,8%. Considerando os domínios presentes no WHOQOL-Bref para avaliar qualidade de vida, os escores foram significativamente diferentes entre os grupos de mulheres sedentárias, moderadamente ativas e muito ativas (pPURPOSE: To evaluate the influence of physical activity on the quality of life of middle

  5. Development of gamma spectroscopy employing NaI(Tl) detector 3 inch x 3 inch and readout electronic of flash-ADC/FPGA-based technology

    Energy Technology Data Exchange (ETDEWEB)

    Hai, Vo Hong [HCMC-National Univ., Hochiminh City (Viet Nam). Inst. of Nuclear Physics; Ton Duc Thang Univ., Ho Chi Minh City (Viet Nam). Div. of Nuclear Physics; Hung, Nguyen Quoc [HCMC-National Univ., Hochiminh City (Viet Nam). Inst. of Nuclear Physics; Khai, Bui Tuan [Osaka Univ. (Japan). Dept. of Physics

    2015-05-15

    n this article the development of a gamma spectroscopy system is described using a scintillation detector NaI(Tl) of 3 inch x 3 inch. The readout electronic for the spectroscopy is built from the fast analog-digital conversion of Flash Analog-Digital Converter (Flash-ADC) 250 MHz - 8 bits resolution, and the embedded Field-Programmable Gate Array (FPGA) technology. The embedded VHSIC Hardware Description Language (VHDL) code for FPGA is built in such a way that it works as a multi channel analyser (MCA) with 4096 Digital Charge Integration (DCI) channels. A pulse generator with frequency varying from Hz up to 12 kHz is used to evaluate the time response of the system. Two standard radioisotope sources of {sup 133}Ba and {sup 152}Eu with multi gamma energies ranging from several tens keV to MeV are used to evaluate the linearity and energy resolution of the system.

  6. Development of gamma spectroscopy employing NaI(Tl) detector 3 inch x 3 inch and readout electronic of flash-ADC/FPGA-based technology

    International Nuclear Information System (INIS)

    n this article the development of a gamma spectroscopy system is described using a scintillation detector NaI(Tl) of 3 inch x 3 inch. The readout electronic for the spectroscopy is built from the fast analog-digital conversion of Flash Analog-Digital Converter (Flash-ADC) 250 MHz - 8 bits resolution, and the embedded Field-Programmable Gate Array (FPGA) technology. The embedded VHSIC Hardware Description Language (VHDL) code for FPGA is built in such a way that it works as a multi channel analyser (MCA) with 4096 Digital Charge Integration (DCI) channels. A pulse generator with frequency varying from Hz up to 12 kHz is used to evaluate the time response of the system. Two standard radioisotope sources of 133Ba and 152Eu with multi gamma energies ranging from several tens keV to MeV are used to evaluate the linearity and energy resolution of the system.

  7. The solubility of Cr(OH)3(am) in concentrated NaOH and NaOH-NaNO3 solutions

    International Nuclear Information System (INIS)

    Chromium is a major component of the Hanford waste tank sludges, and the presence of Cr in the sludges is a significant concern in the disposal of these sludges because Cr can interfere with the formation of waste glasses. One of the current pretreatment strategies for removing constituents that can interfere with glass formation, such as P and Cr, is to wash/dissolve the sludges in basic NaOH solutions. The solubility of Cr(OH)3(am) was measured in concentrated NaOH ranging in concentration from 0.1M to 6.0M and in NaOH-NaNO3 solutions with fixed NaOH concentration and variable NaNO3 concentration at room temperature (22--23 C). Equilibrium between solids and solutions was approached relatively slowly and required approximately 60--70 days before steady-state concentrations were reached. A thermodynamic model, based upon the Pitzer equations, was developed from the solubility data in NaOH, which includes only two aqueous Cr species (Cr(OH)4- and NaCr(OH)4(aq)) and ion-interaction parameters for Na+ with Cr(OH)4-. This model was then tested in the mixed NaOH-NaNO3 solutions and found to be reliable

  8. Synthesis and Characterization of (Na0.sK0.5)NbO3 (NKN) Thin Films Formed by a Diol-based Sol-gel Process

    Institute of Scientific and Technical Information of China (English)

    SeSastian Wiegandt; Stefan Flege; Olaf Baake; Wolfgang Ensinger

    2012-01-01

    Lead-free (Na0.sK0.5)Nb03 (NKN) thin films were fabricated by spin coating on Pt/Ti/SiO2/Si substrates by a diol-based sol-gel process. Na-acetate, K-acetate, Nb-pentaethoxide and 1,3 propanediol were used to prepare the NKN precursor solution. Thermal analysis showed two characteristic temperatures of 360 and 600℃. Based on these temperatures, a heat treatment program with pyrolysis at 360℃ and calcination at 600℃ after every layer was used. To avoid inhomogeneities and secondary phases, an excess of sodium and potassium was necessary. To evaluate the proper excess amount of sodium and potassium secondary ion mass spectrometry (SIMS) lateral element maps and X-ray diffraction (XRD) patterns were recorded. An excess amount of 20% led to homogeneous distribution of the elements and to single phase perovskite NKN films with random crystal orientation. Scanning electron microscopy (SEMI images showed a pore free surface with 100 nm grains. The leakage current measurements showed a current of lx10-3 A/cm2 at 150 kV/cm.

  9. Effect of Different Calcination Temperatures and Post Annealing on the Properties of Acetic Acid Based Sol-Gel (Na0.5K0.5)NbO3 (NKN) Thin Films

    Institute of Scientific and Technical Information of China (English)

    Sebastian Wiegand; Stefan Flege; Olaf Baake; Wolfgang Ensinger

    2013-01-01

    (Na0.5K0.5)NbO3 (NKN) lead free thin films were synthesized by means of an acetic acid based sol-gel process on Pt/Ti/SiO2/Si substrates.Na-acetate,K-acetate and Nb-pentaethoxide were used as metal precursors and acetic acid as the solvent.The effect of different calcination temperatures on the properties of the NKN films was investigated by X-ray diffraction,scanning electron microscopy,leakage current and hysteresis measurements.Low calcination temperatures led to low currents at high electric fields whereas high calcination temperatures led to low currents at low electric fields.Based on these findings calcination at low temperature was combined with a post annealing treatment.Low leakage currents of 4 × 10-4 A/cm2 at 150 kV/cm and 2Pr and 2Ec values of 28 μC/cm2 and 150 kV/cm,respectively,could be obtained.All films were single phase NKN with random crystal orientations and no crack or pore formation was visible on the surface.

  10. Reaction dynamics during pulsed light activation of ATX-S10 Na(II)-sensitized cell cultures: analysis based on fluorescence-oxygen diagram

    Science.gov (United States)

    Kawauchi, Satoko; Sato, Shunichi; Morimoto, Yuji; Kikuchi, Makoto

    2005-04-01

    To elucidate the mechanism of photosensitization with pulsed light excitation, we previously introduced fluorescence-oxygen diagram that shows the correlation between photochemical oxygen consumption and photobleaching during a treatment (Kawauchi et al., Photochem. Photobiol., 80, 216-223, 2004). In pulsed photodynamic treatment of A549 cells with ATX-S10"Na(II), the diagrams for treatments at relatively high repetition rates of 10 and 30 Hz showed the complex behaviors of photochemical reaction; photobleaching initially occurred with oxygen consumption but it was switched to oxygen-independent photobleaching, which was followed by a secondary oxygen-consuming regime. In this study, fluorescence microscopy revealed that for treatments at 10 and 30 Hz, subcellular fluorescence distribution of ATX-S10×Na(II) changed drastically from the high-intensity spotty patterns showing lysosomal accumulation to the diffusive patterns within the cytosol during certain ranges of total light dose. These ranges were found to coincide with those in which oxygen-independent reaction appeared. These findings suggest that the sensitizer started to be redistributed from lysosomes to the cytosol during the oxygen-independent reaction regime. On the other hand, at 5 Hz, such reaction switching was not clearly seen during whole irradiation period in the diagram; this was consistent with the observation that sensitizer redistribution efficiently occurred even in the early phase of irradiation. The appearance of oxygen-independent reaction at the higher repetition rates may be caused by high local concentration of the sensitizer and the resultant low concentration of oxygen in the reaction sites due to the shorter pulse-to-pulse time intervals. In pulsed photodynamic treatment, pulse frequency is an important parameter that affects the intracellular kinetics of the sensitizer and hence the photochemical reaction dynamics.

  11. Revestimento ativo de amido na conservação pós-colheita de pera Williams minimamente processada Starch-based edible coating on extending shelf life of fresh-cut pear

    Directory of Open Access Journals (Sweden)

    Diego Alvarenga Botrel

    2010-08-01

    Full Text Available A pera é uma das frutas de clima temperado mais consumidas no Brasil, no entanto sua conservação é limitada devido ao seu escurecimento quando sofre danos ou tratamentos físicos. Os revestimentos comestíveis interagem favoravelmente com o alimento, aumentando sua vida de prateleira. Este trabalho objetivou avaliar a ação de revestimento de amido adicionado de lactato de cálcio e L-cisteína na inibição do escurecimento enzimático, na redução do crescimento de psicrotrófilos e enterobactérias e na manutenção da textura. As peras fatiadas foram cobertas com revestimentos comestíveis à base de amido incorporados com cisteína e lactato de cálcio, exceto o controle - sem revestimento (C. Os tratamentos foram: apenas revestimento (T1; 2,0% lactato de cálcio e 1,0% L-cisteína (T2 e 2,0% lactato de cálcio e 1,5% L-cisteína (T3. As amostragens foram feitas nos tempos zero, dois, quatro e seis dias. As amostras foram mantidas sob refrigeração (7°C±2°C. As peras submetidas aos tratamentos T2 e T3 apresentaram-se significativamente mais firmes (PPear is one of the most consumed temperate fruits in Brazil; however their conservation is limited due to browning when it suffers injuries or physical treatments. The edibles coating interact with the food positively extending its shelf life. This research aimed to evaluate the action of starch edible coating incorporated with calcium lactate and L-cysteine on enzymatic browning inhibition, on psychrotrophs and enterobacteriaceae growing reduction and on firmness maintenance. The sliced pears were coated with starch edible coating incorporated with L-cysteine and calcium lactate, except control, without coating (C. The treatment were: only coating (T1; 2,0% calcium lactate and 1,0% L-cysteine (T2; 2,0% calcium lactate and 1,5% L-cysteine (T3. The samples were taken at 0, 2, 4 and 6 days. Pears were keeped under refrigeration (7°C±2°C. Pears submitted to treatments T2 and T3 show

  12. At NA2

    CERN Multimedia

    1977-01-01

    One of the NA2 calorimeter sections is moved in. The NA2 calorimeter was divided in two halves, to the left and the right of the beam, each half consisting of sheets of passive high Z material interleaved with blades of plastic scintillators. The photo shows on the right, the upstream 'electron' module with eleven lead plates for a total radiation length of 20.

  13. Y-virus krumpira na duhanu na Kosovu

    OpenAIRE

    Taraku, Nysret; Juretić, Nikola

    1991-01-01

    U prošlih nekoliko godina javlja se na duhanu na području Kosova vrlo agresivna virusna bolest zbog koje nastaju znatne gospodarske štete. Na oboljelim biljkama virus uzrokuje nekrotične promjene na listu, osobito nekroze žila, te mozaik. U ovom su radu istražena 4 virusna izolata (TI, T2, T3, T4) nađena na duhanu u okolici Gnjilana, Uroševca, Đakovice i Prizrena. Na osnovi istraživanja kruga domaćina, osobina in vitro, seroloških svojstava te studija mikroskopskih i submikroskopskih inkluzij...

  14. Effects of Combined CCR5/Integrase Inhibitors-Based Regimen on Mucosal Immunity in HIV-Infected Patients Naïve to Antiretroviral Therapy: A Pilot Randomized Trial

    Science.gov (United States)

    Ma, Zhong-Min; Utay, Netanya S.; Wook-Chun, Tae; Mann, Surinder; Kashuba, Angela D.; Siewe, Basile; Albanese, Anthony; Troia-Cancio, Paolo; Sinclair, Elizabeth; Somasunderam, Anoma; Yotter, Tammy; Deeks, Steven G.; Landay, Alan; Pollard, Richard B.; Miller, Christopher J.; Moreno, Santiago; Asmuth, David M.

    2016-01-01

    Whether initiation of antiretroviral therapy (ART) regimens aimed at achieving greater concentrations within gut associated lymphoid tissue (GALT) impacts the level of mucosal immune reconstitution, inflammatory markers and the viral reservoir remains unknown. We included 12 HIV- controls and 32 ART-naïve HIV patients who were randomized to efavirenz, maraviroc or maraviroc+raltegravir, each with fixed-dose tenofovir disoproxil fumarate/emtricitabine. Rectal and duodenal biopsies were obtained at baseline and at 9 months of ART. We performed a comprehensive assay of T-cell subsets by flow cytometry, T-cell density in intestinal biopsies, plasma and tissue concentrations of antiretroviral drugs by high-performance liquid chromatography/mass spectroscopy, and plasma interleukin-6 (IL-6), lipoteichoic acid (LTA), soluble CD14 (sCD14) and zonulin-1 each measured by ELISA. Total cell-associated HIV DNA was measured in PBMC and rectal and duodenal mononuclear cells. Twenty-six HIV-infected patients completed the follow-up. In the duodenum, the quadruple regimen resulted in greater CD8+ T-cell density decline, greater normalization of mucosal CCR5+CD4+ T-cells and increase of the naïve/memory CD8+ T-cell ratio, and a greater decline of sCD14 levels and duodenal HIV DNA levels (P = 0.004 and P = 0.067, respectively), with no changes in HIV RNA in plasma or tissue. Maraviroc showed the highest drug distribution to the gut tissue, and duodenal concentrations correlated well with other T-cell markers in duodenum, i.e., the CD4/CD8 ratio, %CD4+ and %CD8+ HLA-DR+CD38+ T-cells. Maraviroc use elicited greater activation of the mucosal naïve CD8+ T-cell subset, ameliorated the distribution of the CD8+ T-cell maturational subsets and induced higher improvement of zonulin-1 levels. These data suggest that combined CCR5 and integrase inhibitor based combination therapy in ART treatment naïve patients might more effectively reconstitute duodenal immunity, decrease inflammatory

  15. VPLIV MOTIVACIJE NA DELOVNEM MESTU

    OpenAIRE

    Žitnik, Marjan

    2011-01-01

    Diplomski seminar predstavlja motivacijo, bolj natančno motivacijo na delovnem mestu in kako motivacija vpliva na zaposlene v podjetju, tako kot tudi na organizacijo in okolico. Predstavljeni so tudi dejavniki motivacije in posameznik, ki je tvorec svojih lastnosti in sposobnosti preko katerih vpliva, tako na lastno motivacijo, tako kot tudi na motivacijo ostalih v organizaciji. Največja pozornost v diplomskem seminarju je namenjena teorijam motivacije, iz katerih izhajajo nadaljnje ugotovitv...

  16. Avaliação da diversidade fenotípica em rambuteiras (Nephelium lappaceum com base na qualidade dos frutos Evaluation of phenotipic diversity in rambutan trees (Nephelium lappaceum based on fruit quality

    Directory of Open Access Journals (Sweden)

    Célio Kersul do Sacramento

    2013-03-01

    Full Text Available O rambotã (Nephelium lappaceum L., fruta originária da Ásia, é cultivado comercialmente no Brasil, nos Estados da Pará e Bahia, mas devido à propagação sexuada, apresenta grande variabilidade para características morfológicas e químicas dos frutos. Visando a identificar potenciais matrizes, foram avaliados, em Ituberá-BA, frutos de 105 genótipos de rambotã com base na coloração da casca, suculência e teor de sólidos solúveis. Nesse grupo de plantas, 80 genótipos (76,2% apresentaram frutos com teor de sólidos solúveis igual ou superior a 16 ºBrix e tiveram uma amostra coletada para análise em laboratório. Após a pesagem, foram identificados 20 genótipos cujos frutos apresentaram peso médio acima de 30 g e foram submetidos às análises físico-químicas. Os genótipos avaliados apresentaram frutos com peso médio de 33,2 g (30,2 a 39,4 g, rendimento do arilo de 42,3% (35,1 a 50,2%, sólidos solúveis de 17,6 ºBrix (15,8 a 19,7 ºBrix e acidez titulável 0,44% (0,19 a 0,86%. A amostra de rambuteiras avaliadas apresentou grande variabilidade fenotípica e permitiu a identificação de 20 19 ou 19,05% do total de genótipos avaliados, cujas características dos frutos atendem aos padrões estabelecidos em outros países (peso acima de 30 g e sólidos solúveis acima de 16 ºBrix.The rambutan (Nephelium lappaceum L. fruit originated from Ásia is commercially growth in the states of Pará and Bahia, Brazil, but due to sexual propagation, it shows great variability to morphological and chemical characteristics of the fruits. In order to select potential matrices, fruits of 105 genotypes of rambutan grown in Ituberá, BA were evaluated, based on fruit size, coloration of epicarp and soluble solids. In this sample, 80 genotypes (76.2% presented fruits with soluble solids rate 16 ºBrix or above and their fruits were analyzed in laboratory. After the weighing were indentified 20 genotypes which presented fruits with average

  17. Unidades fototérmicas e temperatura-base inferior de frutos de Mangueira Alfa, na Baixada Cuiabana Photothermal units and lower base temperature for alfa mango fruit on the Baixada Cuiabana

    Directory of Open Access Journals (Sweden)

    Marcelo Paes de Barros

    2010-06-01

    Full Text Available O objetivo deste trabalho foi determinar a temperatura-base inferior (Tb a partir da unidade fototérmica (UF para o cultivo experimental de manga Alfa sob condições de cerrado. Foram utilizados dados diários da temperatura do ar disponibilizados pela Estação Agrometeorológica Padre Ricardo Remetter, localizada em Santo Antônio do Leverger-MT (15,8° S e 56,1° W, 140 m, e avaliação sensorial do estádio de maturação dos frutos de manga. A Tb foi determinada pelo método da menor variabilidade das unidades fototérmicas (UF acumuladas do período da floração à colheita dos frutos, variabilidade avaliada pelo coeficiente de variação (cv simulado para diferentes valores da Tb. De julho a novembro de 2007, em três plantas de um pomar demonstrativo irrigado, foram identificados 82 frutos para o acompanhamento do crescimento e maturação. Entre esses frutos, em meados de dezembro de 2007, foi possível identificar 13 frutos que atingiram a maturidade fisiológica, após um período médio de observação de 112 dias. Para exigência fototérmica de 1.878.166,1 UF, encontrou-se Tb de 10 °C, valor consistente com os apresentados na literatura para a cultivar de manga, o que comprova a eficiência do método que combina a ação da temperatura e do fotoperíodo sobre a maturação dos frutos e que confere um caráter mais racional que o método tradicional da soma térmica.In this study was to determine the lower base temperature (Tb for Alfa mango fruit, using the photothermal units (PTU method in cerrado conditions. The meteorological data for the study were acquired from "Padre Ricardo Remetter" meteorological station located at Santo Antonio do Leverger, MT, Brazil (15,8° S and 56,1° W, 140 m, and the fruit data was acquired by sensorial evaluation of mango fruit maturation state. The Tb was determined by less variability of the coefficient of variation (cv method applied to the PTU sum, from flowering to harvest, simulated for

  18. Saberes da docência na educação profissional e tecnológica: um estudo sobre o olhar dos professores The teacher knowledge base concerning Technological and Vocational Education (TVE: an exploration into the teacher's viewpoints

    Directory of Open Access Journals (Sweden)

    José Ângelo Gariglio

    2012-03-01

    Full Text Available Tendo como referência a histórica desregulamentação da docência na Educação Profissional e Tecnológica, além de uma restrita produção científica sobre a matéria, fazemos uma discussão inicial sobre os saberes mobilizados pelos docentes da EP, analisando, a partir das representações dos sujeitos docentes de diversas instituições, os saberes acionados e demandados nas suas atividades educativas e as concepções de formação profissional subjacentes a tais saberes. Autores como Gauthier, Tardif, Lessard, Oliveira e Peterossi ancoram nossas análises, que apontam para a necessidade de se avançar o debate tanto sobre o modelo quanto sobre o lócus da formação desses professores, dando atenção às suas especificidades. Aponta-se para a urgência de definição de políticas de Estado na área: regulamentação do exercício da docência na EP, estratégias de profissionalização, definição de carreiras, salários e avaliação.Having as its reference the historical teaching de-regulation in technological and vocational education, along with a restricted (rare or scarce scientific publication on the matter, we carry out an initial discussion concerning the knowledge base mobilized by the TVE teachers. We do this by means of an analysis of: 1 presentations by teachers from several TVE institutions; 2 the knowledge base activated and/or called into demand by these educational activities. Authors like Gauthier, Tardif, Lessard, Oliveira and Peterossi, strengthen (by way of a theoretical base our analysis, while at the same time making it clear that a debate needs to be launched, as much for the sake of defining the model, as for defining the locus (focal point in the training that TVE teachers receive. Attention needs to be given to the specificities encountered in providing training for teachers training in this field. The urgent need for the state to define its policies in this area, is also pointed out. For example, there is

  19. Redução da proteína em dietas para tilápias-do-nilo por meio da suplementação de aminoácidos com base no conceito de proteína ideal Protein reduction in diets for Nile tilapia by amino acids supplementation based on the ideal protein concept

    Directory of Open Access Journals (Sweden)

    José Sérgio Righetti

    2011-03-01

    Full Text Available Este trabalho foi realizado para avaliar os efeitos da redução da proteína da dieta, por meio da suplementação com aminoácidos sintéticos, sobre o desempenho produtivo, a digestibilidade e o diâmetro da fibra muscular de tilápias-do-nilo. Os aminoácidos (lisina, metionina, treonina e arginina foram suplementados de forma a manter o perfil de aminoácidos da dieta-referência. Foram utilizados 160 peixes com peso vivo médio inicial de 105,7 ± 2,5 g, distribuídos em 16 tanques (1 m³ cada e alimentados com dietas contendo 26,74; 25,82; 23,09 ou 22,16% de proteína digestível durante 110 dias. Não foi observado efeito dos níveis de proteína nas dietas sobre o ganho de peso diário, o índice hepatossomático, a gordura visceral, o rendimento de filé, os teores corporais de umidade, proteína bruta e cinzas, o teor de cinzas no filé, a taxa de sobrevivência e o diâmetro das fibras do músculo dorsal. Com a redução dos níveis de proteína na dieta, foi observada redução linear dos coeficientes de digestibilidade aparente da energia bruta, proteína bruta, extrato etéreo e fósforo das dietas. Houve efeito quadrático dos níveis de proteína sobre a conversão alimentar, a taxa de eficiência proteica, a retenção de nitrogênio, o nitrogênio excretado, a umidade no filé, a gordura corporal e no filé e proteína no filé, de modo que os melhores valores foram estimados com 24,53; 24,25; 24,04; 25,15; 24,67; 24,14; 24,34; 25,11% de proteína digestível, respectivamente. É possível reduzir, de 26,74 para 24,53%, a proteína digestível em dietas para tilápias-do-nilo na fase de 100 a 500 g.The objective of this work was to evaluate the effects of reduction of protein in diets for Nile tilapia by supplementation of synthetic amino acids on performance, digestibility and diameter of muscle fiber of Nile tilapias. The amino acids (lysine, methionine, threonine and arginine were supplemented to keep the profile of amino

  20. Optimalizace kotle na biomasu

    OpenAIRE

    Mizerovský, Karel

    2015-01-01

    Bakalářská práce se zabývá návrhem opatření pro optimalizaci kotle na biomasu. Teoretická část pojednává o základním rozdělení kotlů na tuhá paliva se zaměřením na kotle spalující biomasu. Další část práce se věnuje návrhu deflektorů, zvyšujících účinnost zařízení a praktické ověření výsledků měřením.

  1. Profile of Brazilian scientific research in pediatric dentistry based on the 26th Annual Meeting of the SBPqO = Perfil da produção científica brasileira na Odontopediatria baseado na 26ª Reunião da SBPqO

    OpenAIRE

    Morosini, Imara de Almeida Castro

    2012-01-01

    Objetivo: Descrever a produção científica brasileira na Odontopediatria em 2009, baseandose na 26ª Reunião Anual da SBPqO (divisão brasileira do IADR). Metodologia: Todos os estudos na área de Odontopediatria, selecionados a partir dos resumos apresentados na reunião, foram avaliados em termos de assuntos, desenho metodológico e unidades amostrais. Resultados: Dos 2648 resumos apresentados, 7,7% corresponderam aos de Odontopediatria, representando a área com a quarta maior participação....

  2. Na via do Behemoth

    Directory of Open Access Journals (Sweden)

    Gérard Rabinovitch

    2008-06-01

    Full Text Available O momento nazista permanece um enigma impensado de que a cultura contemporânea continua cativa. O autor levanta a hipótese de que a persistência desse enigma e seus estragos duráveis se devem à insistência dos pensamentos político, sociológico e filosófico em construírem o nazismo à luz da metáfora hobbesiana do Leviatã. Propõe retomar a questão do nazismo sob a perspectiva do Behemoth, antônimo do Leviatã. Para tanto, sugere a necessidade de retornar a Freud e à psicanálise, balizas de um possível novo pensamento do político que escrutine a destrutividade nazista. Propõe ainda sondar as homologias entre nazismo, corjas e máfias, com base na figura da " heroicização da violência" que lhes seria comum. E avança um modelo " econômico" : a quimera, suscetível de capturar o caráter heterotópico e heterocrônico de sua construção criminosa.The paths of Behemoth. The Nazi moment remains as the thoughtless enigma of which contemporary culture is still captive. The author raises the hypothesis where the persistency of this enigma and its durable damages are due to the insistence of the political, social and philosophical thoughts in building the Nazism at the view of the Hobbesian metaphor of Leviathan. It is here proposed to resume the Nazism matter under Behemoth's perspective, antonym to Leviathan. For such, it is suggested a necessity to look back at Freud and the psychoanalysis, structured by a possible new political thought which scrutinizes the destructivity of the Nazism. It is also here proposed to gaze at the homologies between Nazism, mafias and gangs, with a base in the figure of " violence as a heroically act" that are their common ground. The author also advances an economical model: the chimera susceptible to capture the heterotopic and heterochronic character of its criminal construction.

  3. A ENGENHARIA NA ESCOLA

    Directory of Open Access Journals (Sweden)

    Valéria Pelizzer Casara

    2015-04-01

    Full Text Available Este projeto teve por objetivo principal mostrar às jovens do ensino médio, como as áreas de exatas e de engenharia podem estar inseridas em situações rotineiras por elas vivenciadas e incentivá-las para ingressarem nessas áreas. Mostrou-se de forma simples que as áreas de exatas e de engenharia têm aplicações práticas nas nossas vidas. Esse projeto atende a chamada pública MCTI/CNPq/SPM-PR/Petrobras nº 18/2013 -  Meninas e Jovens Fazendo Ciências Exatas, Engenharias e Computação. O projeto foi executado na escola de ensino Médio Nelson Horostecki na cidade de Chapecó-SC. No desenvolvimento do projeto, realizaram-se oficinas na escola cujo tema principal abordado foi o processo de fabricação do chocolate, visto que o mesmo é um produto muito apreciado pelas adolescentes. Dentro dessa temática, foram trabalhadas as questões que envolvem conhecimentos das áreas de exatas e de engenharia, mais especificamente a engenharia ambiental. O projeto auxiliou na formação cidadã e também na escolha profissional das meninas. Muitas das alunas participantes nunca tiveram contato direto com alunos graduandos de algum curso na área das exatas e este projeto oportunizou a aproximação da universidade com a comunidade externa.

  4. A Insustentabilidade do Turismo no Brasil e o Sucesso de Praia do Forte: uma análise exploratória com base na nova economia institucional

    Directory of Open Access Journals (Sweden)

    Marcus Alban

    2010-06-01

    -default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.WordSection1 {page:WordSection1;} -->

    Resumo

    Baseado no pressuposto de que o turismo é uma rota natural e fácil, a evolução do setor no país, desde os anos 90, tem se pautado por uma estratégia de forte expansão espacial da infra-estrutura. Partindo-se de uma análise do baixo desempenho dessa estratégia, demonstra-se o equívoco desse pressuposto. A conclusão é de que o turismo não tem nada de natural ou fácil. Ao contrário é uma rota bastante complexa, que não pode se desenvolver sem boas estruturas de governança. Face a essa constatação, o artigo apresenta as linhas mestras da Nova Economia Institucional e, com base na mesma, analisa os complexos sistemas de governança das cadeias produtivas do setor. Posteriormente, de posse desse novo referencial, estuda-se a singular estrutura de governança do

  5. NOČNA FOTOGRAFIJA

    OpenAIRE

    Grgurič, Gregor

    2014-01-01

    Nočna fotografija se zajema na prostem med mrakom in zarjo. Z njo poskušamo izkoristiti drugačen ambient kot pri dnevni svetlobi. Zaradi pomanjkanja svetlobe izvedba nočne fotografije zahteva uporabo daljših osvetlitvenih časov. Če je čas osvetlitve senzorja daljši, je ponavadi prisotna določena stopnja šuma, ki ga lahko omilimo s kvalitetnejšimi fotoaparati in s prilagojeno tehniko fotografiranja. Pomemben faktor pri nočni fotografiji je oprema. Poslužujemo se tudi različnih pripomočkov, kot...

  6. MOBING NA DELOVNEM MESTU

    OpenAIRE

    Mraz, Darja

    2011-01-01

    Mobing pomeni načrtno psihično nasilje,trpinčenje in šikaniranje,ki žrtev privede do socialne izolacije.Proces mobinga poteka skozi štiri faze.Začne se s konfliktom in nadaljuje z uveljavitvijo mobinga v obliki stalnih napadov,vse skupaj pa se lahko konča z izključitvijo iz delovnega življenja.Ključni dejavniki mobinga so stres pri delu,način vodenja ter slabo vzdušje med zaposlenimi in vodstvom.

  7. 四元体系NaCl-NaBr-Na2SO4-H2O348K相平衡研究%Study on Phase Equilibria for Quaternary System of NaCl-NaBr-Na2SO4-H2O at 348 K

    Institute of Scientific and Technical Information of China (English)

    张勇刚; 桑世华; 张凯杰; 胡富铭; 崔瑞芝

    2013-01-01

    The phase equilibria of the quaternary system of NaCl - NaBr - Na2SO4 - H2O at 348 K are investigated, and the solubility and density of the solution are determined by isothermal e-quilibrium method. The experimental results indicate that the quaternary system is the system with solid in the solution. Based on the experimental data, the phase diagram of the quaternary system is plotted, which consists of a univariant dissolution curve and two crystallization fields: Na ( Cl 、Br) and Na2SO4. The experimental results show that the sodium bromide has the salting - out effect on sodium chloride. Meanwhile, the rule of density is discussed briefly.%采用等温溶解平衡法研究了348 K下四元体系NaCl-NaBr-Na2 SO4-H2O的相平衡规律,测定了平衡液相的溶解度和密度.研究发现,四元体系NaCl-NaBr-Na2SO4-H2O是含有固体溶液的体系.根据实验研究数据绘制了等温溶解度图,相图中只有一条单变量溶解曲线,两个结晶相区,平衡固相分别为Na(Cl、Br)和Na2SO4.实验结果表明,NaBr对NaCl具有盐析效应,并简要讨论了密度变化规律.

  8. Subsídios à prevenção e combate a incêndios florestais com base no comportamento da precipitação pluviométrica na Floresta Nacional de Irati, Paraná.

    OpenAIRE

    Alexandre França Tetto; Antonio Carlos Batista; José Renato Soares Nunes; Ronaldo Viana Soares

    2010-01-01

    Este trabalho foi desenvolvido na Floresta Nacional de Irati localizada, predominantemente, no município de Fernandes Pinheiro, Paraná, com base em dados meteorológicos de precipitação pluviométrica diária, no período de 1963 a 2006. Teve como objetivo analisar os aspectos do comportamento da precipitação, com a finalidade de utilizar esse parâmetro no planejamento de prevenção e combate aos incêndios florestais, em tal unidade de conservação, sobretudo no que diz respeito à definição do perí...

  9. Irrupción de la pasta base de cocaína : El impacto en las representaciones sociales y en los dispositivos desde la perspectiva de los especialistas

    OpenAIRE

    Parajuá, Sofía; Pawlowicz, María Pía; Galante, Araceli A.; Rossi, Diana; Goltzman, Paula; Touzé, Graciela

    2009-01-01

    La dinámica de los patrones de uso de drogas cambian a un ritmo tan veloz que nos desafía a una constante revisión tanto de los diagnósticos, como de las estrategias políticas y de los dispositivos de intervención. En nuestro contexto, un fenómeno que "irrumpió" en el campo de las drogas ha sido el del consumo de la pasta base de cocaína (PBC). ¿Pero qué significa la “aparición del paco”? En los últimos años, luego de la crisis de 2001, los discursos sociales sobre “el paco” sobreabundan y ti...

  10. Decreased gray matter volume is associated with the subtypes of psychotic symptoms in patients with antipsychotic-naïve mild or moderate Alzheimer's disease: A voxel-based morphometry study.

    Science.gov (United States)

    Lee, Young-Min; Chung, Young-In; Park, Je-Min; Lee, Byung-Dae; Moon, Eunsoo; Jeong, Hee-Jeong; Kim, Ji-Hoon; Kim, Hak-Jin; Mun, Chi-Woong; Kim, Tae-Hyung; Kim, Young-Hoon; Kim, Eun-Joo

    2016-03-30

    The purpose of this study was to investigate the association between brain regional gray matter volume and two subtypes of psychotic symptoms, namely paranoid and misidentification subtypes, in antipsychotic-naïve mild or moderate Alzheimer's disease (AD) patients. Forty AD patients with psychotic symptoms and 25 AD patients without psychotic symptoms were assessed for cognitive and functional impairment. Presence and subtype of psychotic symptoms were assessed by using the delusion and hallucination subscale of the Korean Neuropsychiatric Inventory (K-NPI). Structural MRI images were acquired on a 3 T scanner, and were analyzed using voxel-based morphometry (VBM) for automated analysis. The misidentification subtype is associated with more severe gray matter atrophy, and paranoid subtype is associated with less severe gray matter atrophy compared to non-psychosis group. These results suggest that the misidentification, the paranoid subtype and the non-psychosis group have a distinct neural correlation. PMID:27000306

  11. Abordagens da produção científica em administração publicada na base Scopus à luz da teoria institucional, de 2000 a 2013

    OpenAIRE

    Sabrina do Nascimento; Daniel Penz; Bianca Costa Amorim; Gisele Mazon; Carlos Ricardo Rossetto

    2014-01-01

    O presente artigo teve como objetivo analisar a produção científica sobre Teoria Institucional indexada na base de dados Scopus voltada para a área de Administração, no período de 2000 a 2013. Evidenciou-se que: o autor mais prolífico sobre a temática da Teoria Institucional é Currie, G.; as universidades com maior publicação foram a University of Alberta e University of Nottingham. No cenário nacional, duas revistas aparecem, a RAE – Revista de Administração de Empresas e a Revista de Admini...

  12. Effect of potassium content on electrostrictive properties of Na0.5Bi0.5TiO3-based relaxor ferroelectric thin films with morphotropic phase boundary

    International Nuclear Information System (INIS)

    (1 − x)Na0.5Bi0.5TiO3–xK0.5Bi0.5TiO3 (NBT–KBT100x) (x = 0.13, 0.15, 0.18, 0.20, 0.25) thin films were prepared by metal–organic decomposition, and the crystalline structures, surface morphologies, leakage current densities and dielectric, piezoelectric, and ferroelectric properties were investigated by X-ray diffractometer, scanning electron microscopy, semiconductor characterization system, scanning probe microscopy, and ferroelectric tester, respectively. The electrostrictive equation in phenomenological theory is used to model the piezoelectric and electrostriction behaviors of relaxor ferroelectric thin films, and the electrostriction coefficient couples effective piezoelectric coefficient with the polarization and relative permittivity. The electrostriction strains are larger than the piezoelectric strains for NBT–KBT100x thin films, and the electrostriction coefficients and electrostrictive strains are at the ranges of 0.019–0.025 m4/C2 and 0.12%–0.26%, respectively. NBT–KBT15 thin film is of the largest electrostriction coefficient and electrostrictive strain, and it is attributed to the appropriate potassium content near morphotropic phase boundary and the equivalent energy for the phase coexistence. The results indicate that NBT-based thin film with high electrostrictive properties is a promising candidate for the application in electromechanical devices. - Highlights: • Na0.5Bi0.5TiO3–xK0.5Bi0.5TiO3 films were prepared by metal–organic decomposition. • The electrostrictive properties were measured based on the electrostrictive equation. • Largest electrostriction coefficient and strain were 0.025 m4/C2 and 0.26%. • Na0.5Bi0.5TiO3–xK0.5Bi0.5TiO3 thin films are promising for transducer applications

  13. Avaliação da inflamação com base na liberação de radicais oxidantes por granulócitos na asma crônica não-controlada Assessment of inflammation based on the release of oxygen radicals by granulocytes in chronic uncontrolled asthma

    Directory of Open Access Journals (Sweden)

    Cristina F. Sartorelli

    2009-04-01

    Full Text Available OBJETIVO: Avaliar a liberação espontânea de ânion superóxido por granulócitos de sangue periférico de pacientes com asma crônica não-controlada antes e após corticoterapia e de indivíduos sadios. MÉTODOS: Foram estudados 32 pacientes entre 6 e 18 anos (média 12,04 anos e 29 indivíduos sadios como grupo de comparação. Os pacientes foram agrupados de acordo com o volume expiratório forçado no primeiro segundo: grupo I, volume expiratório forçado no primeiro segundo entre 60 e 80%, 19 pacientes; e grupo II, volume expiratório forçado no primeiro segundo = 60%, 13 pacientes. A liberação espontânea de superóxido por granulócitos, medida por espectrofotometria utilizando superóxido dismutase, foi avaliada nos pacientes antes e após o tratamento com prednisona por via oral e beclometasona, budesonida ou fluticasona administradas por via inalatória. Na análise estatística foram utilizados os testes de análise de variância, Tukey e de Wilcoxon. RESULTADOS: Comparando-se a liberação de ânion superóxido por granulócitos dos pacientes asmáticos e indivíduos sadios observamos que a liberação foi maior nos asmáticos não-controlados do grupo II (p OBJECTIVE: To evaluate spontaneous release of superoxide anion by peripheral blood granulocytes of atopic patients with uncontrolled asthma undergoing glucocorticoid therapy and of healthy subjects. METHODS: We studied 32 patients, aged 6 to 18 (mean 12.04, and 29 healthy subjects as a comparative group. Patients were grouped according to the forced expiratory vital capacity in the first second. Group I, forced expiratory vital capacity in the first second of between 60 and 80%, had 19 patients, and group II, forced expiratory vital capacity in the first second = 60%, had 13 patients. Spontaneous superoxide release by granulocytes was measured by a spectrophotometer method based on superoxide dismutase, before and after oral prednisone and beclomethasone, budesonide or

  14. At NA3

    CERN Multimedia

    1978-01-01

    The photo shows the proportional chamber PC1 of the NA3 forward spectrometer. The chamber was placed downstream the beam dump and specially designed to support a high flux of particles, see Nucl. Instrum. Methods 175 (1980) 319. Anta Diop stands on the foreground, right.

  15. The NA35 experiment

    CERN Multimedia

    1987-01-01

    The NA35 experiment ran on the Super Proton Synchrotron (SPS) accelerator at CERN. It was used for the study of relativistic nucleus-nucleus collisions which were used to search for evidence of new types of quark matter. Quarks are found inside protons and neutrons, which in turn make up atoms.

  16. Konstrukce sila na cukr

    OpenAIRE

    Kotík, Libor

    2015-01-01

    Předmětem diplomové práce je statický návrh a posudek předpjatého sila na 50000t cukru. Zpracován je výpočtový model ocelové střešní konstrukce a jeho působení na konstrukci sila. Je stanoveno zatížení od uskladněného cukru. Je proveden optimální návrh a posouzení na mezní stav použitelnosti a únosnosti betonářské výztuže a vodorovného předpětí stěny sila včetně lokálních namáhání. Dále je proveden návrh betonářské výztuže dna sila a sloupu v podsilí a posouzení na mezní stav únosnosti. Součá...

  17. Riso na epilepsia

    Directory of Open Access Journals (Sweden)

    Edymar Jardim

    1967-06-01

    Full Text Available São estudados três casos de síndrome convulsiva temporal, com manifestações concomitantes de riso na sua fase inicial. As características principais foram a imotivação e á incoercibilidade do riso. Esses sintomas desapareceram com o uso de anticonvulsivantes.

  18. Fluctuations and NA49

    International Nuclear Information System (INIS)

    A brief history of the study of fluctuations in high energy nuclear collisions at the CERN SPS by NA49 is presented. The ideas and the corresponding experimental data on fluctuations are discussed from the point of view of their sensitivity to the onset of deconfinement

  19. Biotecnologia na agricultura

    Directory of Open Access Journals (Sweden)

    Helaine Carrer

    2010-01-01

    Full Text Available A expectativa de o crescimento populacional atingir 9 bilhões de habitantes em 2050 em adição às questões da sustentabilidade e do aquecimento global nos desafiam a aumentar a oferta de alimentos. Uma metodologia alternativa que contribua para a redução do impacto desse cenário envolve a biotecnologia, que, nas últimas décadas, trouxe marcantes oportunidades tecnológicas na agricultura, resultando em relevante desenvolvimento na obtenção de novas variedades de plantas, na melhoria da qualidade de diversos alimentos e atualmente também na bioenergia. As técnicas biotecnológicas envolvendo os marcadores moleculares, a genômica e a transformação genética estão transformando a agricultura e são discutidas neste artigo.The expected population growth to reach 9 billion by 2050 in addition to issues of sustainability and global warming challenges us to increase the supply of food. An alternative approach to help reducing the impact of this scenario involves biotechnology which in recent decades has brought remarkable technological opportunities in the agriculture that resulted in relevant development in obtaining new plant varieties, improved quality of different foods, and now also in bioenergy. The biotechnology techniques involving molecular markers, genomics and genetic transformation are transforming agriculture and will be discussed in this article.

  20. At NA5

    CERN Multimedia

    1978-01-01

    The NA5 experiment is shown at the start of the setting up in beam H2 of hall EHN1. It was designed by the Bari- Cracow-Liverpool-Munich (MPI) Collaboration to study hard hadron-hadron collisions with a streamer chamber vertex spectrometer and a calorimeter trigger. The beam from target T2 enters from the left. E

  1. Níveis de lisina, com base no conceito de proteína ideal, em rações para alevinos de tilápia-do-nilo Lysine levels, based on the ideal protein concept, in diets for Nile tilapia fingerlings

    OpenAIRE

    Marcos Antonio Delmondes Bomfim; Eduardo Arruda Teixeira Lanna; Juarez Lopes Donzele; Moisés Quadros; Felipe Barbosa Ribeiro; Maíra Paula de Sousa

    2010-01-01

    Avaliaram-se os efeitos dos níveis de lisina digestível da ração, com base no conceito de proteína ideal, no desempenho de alevinos de de tilápia-do-nilo (Oreochromis niloticus). Utilizaram-se 432 alevinos revertidos, linhagem tailandesa, com peso inicial de 1,12 ± 0,02 g, em delineamento inteiramente ao acaso, composto de 6 dietas, 6 repetições e 12 peixes por unidade experimental. Como tratamentos, avaliaram-se uma dieta basal com 29,12% de proteína bruta e 3.000 kcal de energia digestível/...

  2. A descoberta de conhecimento em bases de dados como suporte a actividades de business intelligence : aplicação na área do database marketing

    OpenAIRE

    Pinto, Filipe

    2006-01-01

    A existência de bases de dados nas empresas nunca foi tão relevante como nos últimos anos, sendo fácil constatar a sua presença em qualquer projecto ou investimento desenvolvido. Uma base de dados poderá ainda ser considerada, como um repositório de conhecimento potencialmente relevante, mas escondido. De facto o seu conteúdo muitas vezes não é explorado em profundidade, pese embora existam numerosas actividades desenvolvidas sobre elas, como é o caso do marketing directo ou do marketing r...

  3. Incremento na dissolução da caffeine em base de ammonium acryloyldimethyltaurate/vp copolymer: desenvolvimento farmacotécnico de géis anti-celulite

    Directory of Open Access Journals (Sweden)

    Éder Menezes Fernandes

    2015-09-01

    Full Text Available A hidrolipodistrofia ginóide (HLDG, popularmente conhecida como “celulite”, consiste em uma alteração patológica do tecido adiposo e da função veno-linfática. Géis contendo caffeine tem sido empregados no tratamento não-invasivo da HLDG, oferecendo resultados satisfatórios a baixos custos. Devido a baixa hidrossolubilidade da caffeine, este gel apresenta como principal inconveniente a formação de precipitados/grumos, oriundos da precipitação da caffeine na base hidrofílica (gel. Este trabalho tem como objetivo o incremento na dissolução da caffeine em gel de Ammonium Acryloyldimethyltaurate/VP Copolymer, através da adição de adjuvantes como o citric acid e o sodium benzoate, além de solução hidroalcoólica, empregada como co-solvente da caffeine. O incremento na dissolução da caffeine foi verificado através da determinação do seu teor nos géis. Além disso, todas as amostras foram submetidas a análises macroscópicas e determinações de pH e viscosidade. A análise macroscópica permitiu a nítida visualização dos precipitados/grumos nos géis preparados sem os adjuvantes, enquanto que o emprego dos mesmos originou géis sem a presença de precipitados. A determinação do teor de caffeine demonstrou que os adjuvantes e co-solvente quase dobraram a concentração deste ativo nos géis. O pH do gel e a concentração de citric acid não influenciaram na dissolução da caffeine. Por outro lado, esses parâmetros influenciaram negativamente na viscosidade dos géis, o que parece ter sido ocasionado pela instabilidade do ammonium acryloyldimethyltaurate/VP copolymer em valores baixos de pH. Com isso, o aumento na dissolução da caffeine no gel anti-celulite parece ter sido ocasionada pela formação de sais hidrossolúveis com os adjuvantes empregados.Palavras-chave: Hidrolipodistrofia ginóide. Gel redutor. Cafeína. Dissolução. ABSTRACTDissolution enhancement of caffeine in the ammonium

  4. AVALIAÇÃO DAS DIETAS SIMPLIFICADAS E SEMI-SIMPLIFICADAS, COM BASE NA MISTURA DE FORRAGEIRAS, COM E SEM ENZIMAS, PARA COELHOS EM CRESCIMENTO

    Directory of Open Access Journals (Sweden)

    Luiz Carlos Machado

    2012-09-01

    Full Text Available The simplified and half-simplified diets are a new technology that combines economy and welfare intestinal. The main objective of this study was to evaluate the effect of simplified and half-simplified diets, with and without exogenous enzymes, on the productive performance of growing rabbits. A Reference diet, two simplified diets and eight half-simplified diets had been utilized. The main fibrous sources used were the alfalfa hay (ALH, hay from the upper third of the cassava foliage (HUTCF and cassava leaf meal (CLM, using a completely randomized design with 11 treatments and eight repetitions. The enzymes used were the carbohydrases (alpha-galactosidase, galactomanase, xylanase and beta-glucanase and phytase. The consumption of animals fed with diets with high inclusion of CLM was lower than the other. The daily weight gain was higher in animals fed with the reference diet, half-simplified diet based on HUTCF and half-simplified diets based on the mix of ALH and CLM. A positive effect of exogenous enzymes inclusion, on the performance parameters, was not observed. Based on these results we conclude that the simplified and half-simplified diets provide decrease in productive performance. Considering the proportionate economy in the cost of feed, the half simplified based on HUTCF may be an interesting alternative.

  5. Research of Brazilian crude in pilot plant for base oil production; Pesquisa em planta piloto visando valorizar o cru nacional na producao de oleos lubrificantes

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Anita E.F.; Nogueira, Wlamir S.; Ximenes, Lelia M. de O. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES); Santos, Claudio A.P. dos [Fundacao Gorceix, Ouro Preto, MG (Brazil)

    2004-07-01

    One of the biggest challenges for PETROBRAS is to find alternative crude oils to produce base oil and wax in its refinery. Duque de Caxias refinery has been using imported crude oil for 31 years living with constants threats to continuity because of the Persian Gulf conflicts. If we analyze the profitability of this business, we can verify that the lubes complex had contributed for the profitability by about 41,9% in 2002, even using imported crude oil. So, if we can incorporate a national crude oil in the actual refinery scheme, we would produce besides strategic gains better profitability for the base oil and wax unit. This paper describes a series of tests performed in the pilot plant, in which we produced base oils and wax using a mixture of imported crude with Brazilian crude oil. The base oils produced were classified as Group I with lower aromatic, Sulphur and basic Nitrogen content. Another great advantage of this alternative is that the light fractions obtained from distillation step can be used as feed to make fuels of better quality, due to the lower sulphur content, thus also reducing the environmental impact. (author)

  6. Análisis del proceso de minería de datos sobre la base de datos Bioinformática de segmentos de la proteína p53, asociada a la actividad cancerígena

    Directory of Open Access Journals (Sweden)

    Alejandro Hadad

    2011-11-01

    Full Text Available Se estudió la utilización de estrategias para afrontar el problema del desbalanceo y la alta dimensionalidad de los registros que habitualmente forman parte de las bases de datos en el área bioinformática. Se tomó como caso de estudio la base de datos de segmentos de la proteína p53; sobre dicha base se construyen modelos con el fin de identificar si corresponden a patrones activos o inactivos. El problema del desbalanceo se abordó a través de una red neuronal no supervisada, y el de la selección de variables para reducir la alta dimensionalidad, a partir de una combinación de métodos con diferentes enfoques. Experimentos preliminares del modelo propuesto en datos estándar muestran resultados promisorios.

  7. Mineralogical, Geochemical and Isotopic Characterisation of the Travertine Formation Associated with the Alicun de las Torres Thermal System (Province of Granada): Palaeoclimatic and Palaeoenvironmental Implications.; Caracterizacion Mineralogica, Geoquimica e Isotopica de los Travertinos Asociados al Sistema Termal de Alicun de las Torres (Provincia de Granada): Implicaciones Paleoclimaticas y Paleoambientales

    Energy Technology Data Exchange (ETDEWEB)

    Prado, A. J.; Delgado, A.; Crespo, M. T.; Martin, A.; Perez del Villar, L.

    2010-12-24

    In the framework of a Singular Strategic Project entitled: Advanced Technologies of Carbon, Capture and Storage (CCS), supported by the MICINN (Spain) and the FEDER founds (EU), specifically in the Carbon Storage Task, a comprehensive study on the CO{sub 2} leakage as DIC (Dissolved Inorganic Carbon) in the Alicun de Las Torres (Prov. of Granada) natural analogue Thermal System was envisaged. This analogous system is characterised by the presence of a very important travertine formation. In order to explain the formation of these travertine mass a detailed mineralogical, petrographic, geochemical and isotopic, including stable and radioactive isotopes, characterisation has been carried out. Based on these data, paleoclimatic and palaeoenvironmental conditions under which this travertine formation was formed, during a period of approximately 230Ky, have also been deduced. (Author) 234 refs.

  8. ASSESSMENT OF EROSION VULNERABILITY IN THE JACARÉ PEPIRA RIVER BASIN BASED ON THE UNIVERSAL SOIL LOSS MODEL = ESTUDO DA VULNERABILIDADE À EROSÃO NA ALTA BACIA DO RIO JACARÉ PEPIRA UTILIZANDO MODELO BASEADO NA EQUAÇÃO UNIVERSAL DE PERDA DE SOLO

    Directory of Open Access Journals (Sweden)

    Ana Lúcia Carneiro da Costa

    2008-01-01

    Full Text Available In the upper Jacaré Pepira River Basin, in the state of São Paulo, territorial expansion of agrobusiness has caused the acceleration of the erosion process, leading to impacts on natural resources and the landscape in the region. In the present study, an analysis of erosion vulnerability was attempted in an area defined by sub-basins in an Environmental Protection Area (APA Corumbataí. The appropriateness of current land use in light of this vulnerability analysis was also evaluated. The analysis attempted was based on the Universal Soil Loss Equation (USLE model. Operational procedures were carried out with the aid of satellite images and GIS/Spring. The erosion vulnerability map was obtained for the relation of Anthropic Erosion Potential, which considers only anthropic erosion factors, and Tolerable Anthropic Erosion Potential. This depends on tolerable soil loss capacity, pre-defined for different types of soil in the area, and on Natural Erosion Potential, considering natural erosion factors. The vulnerability analysis was done in 1988 and 2004 for land use evolution comparison. The results indicated that sugar cane was the type of land use that had expanded the most, and showed 18.8% of the area with high erosion vulnerability. It is therefore necessary to monitor the evolution of land use evolution and seek ways to make existing activities compatible with the preservation of natural resources and the environmental vocation of the area. = Na alta porção da Bacia Hidrográfica do rio Jacaré Pepira, no Estado de São Paulo, a expansão territorial dos agronegócios tem proporcionado a aceleração dos processos erosivos, o que acarreta impactos à preservação dos recursos naturais e paisagísticos da região. No presente trabalho, realizou-se estudo sobre a vulnerabilidade à erosão em área definida por sub-bacias situadas em uma Área de Proteção Ambiental (APA Corumbataí, avaliando-se ainda a adequação das atuais formas de

  9. Influenza virus neuraminidase (NA): a target for antivirals and vaccines.

    Science.gov (United States)

    Jagadesh, Anitha; Salam, Abdul Ajees Abdul; Mudgal, Piya Paul; Arunkumar, Govindakarnavar

    2016-08-01

    Influenza, the most common infectious disease, poses a great threat to human health because of its highly contagious nature and fast transmissibility, often leading to high morbidity and mortality. Effective vaccination strategies may aid in the prevention and control of recurring epidemics and pandemics associated with this infectious disease. However, antigenic shifts and drifts are major concerns with influenza virus, requiring effective global monitoring and updating of vaccines. Current vaccines are standardized primarily based on the amount of hemagglutinin, a major surface antigen, which chiefly constitutes these preparations along with the varying amounts of neuraminidase (NA). Anti-influenza drugs targeting the active site of NA have been in use for more than a decade now. However, NA has not been approved as an effective antigenic component of the influenza vaccine because of standardization issues. Although some studies have suggested that NA antibodies are able to reduce the severity of the disease and induce a long-term and cross-protective immunity, a few major scientific issues need to be addressed prior to launching NA-based vaccines. Interestingly, an increasing number of studies have shown NA to be a promising target for future influenza vaccines. This review is an attempt to consolidate studies that reflect the strength of NA as a suitable vaccine target. The studies discussed in this article highlight NA as a potential influenza vaccine candidate and support taking the process of developing NA vaccines to the next stage. PMID:27255748

  10. Diets based on soybean protein for Mediterranean fruit fly Dietas baseadas em proteína de soja para moscas do Mediterrâneo

    OpenAIRE

    Raimundo Braga Sobrinho; Carlos Caceres; Amirul Islam; Vivat Wornoayporn; Walter Enkerlin

    2006-01-01

    The objective of this work was to develop suitable and economic diets for mass rearing Mediterranean fruit fly, Ceratitis capitata (Diptera: Tephritidae). Diets containing sugar beet bagase, wheat bran, brewer yeast, and others with wheat bran and palletized soybean protein from Brazil were tested. Diets based on soybean protein have shown promising results regarding pupal recovery, pupal weight and adult emergence. Soybean bagase in the form of pellets with 60% of protein can be a very impor...

  11. STANDARD ODVZEMA KRVI NA DOMU

    OpenAIRE

    Ciglar, Blaž

    2015-01-01

    V sklopu negovalnih intervencij patronažnega varstva, ki jih izvaja patronažna medicinska sestra, smo obravnavali negovalno intervencijo odvzem krvi na domu ter napisali standard. Odvzem krvi na domu sodi k zahtevnejšim negovalnim intervencijam patronažne medicinske sestre, saj zahteva visoko stopnjo profesionalnosti in strokovnosti pri celotnem postopku negovalne intervencije. Odvzem krvi patronažna medicinska sestra izvede po procesu zdravstvene nege po točno določenih korakih, opredeljenih...

  12. O problema do conhecimento verdadeiro na epidemiologia

    Directory of Open Access Journals (Sweden)

    Ayres José Ricardo de Carvalho Mesquita

    1992-01-01

    Full Text Available São examinadas as bases filosóficas da validação do conhecimento científico, com o intuito de estabelecer uma visão crítica a respeito da adoção das proposições de Popper na epidemiologia. Ressalta-se o caráter conservador que resulta das limitações técnicas implicadas na sua adoção, não obstante o evidente aumento da racionalidade e da criatividade heurística que propicia.

  13. Ensino de geometria descritiva: inovando na metodologia

    OpenAIRE

    Kopke Regina Coeli Moraes

    2001-01-01

    Com base na observação, durante anos de magistério superior, na área de desenho, dos alunos de Engenharia, Matemática, Arquitetura e Artes, quanto às dificuldades encontradas por eles no aprendizado de desenho, em especial da Geometria Descritiva, é que nos propusemos, em 1999, lecionar essa disciplina para os cursos de Arquitetura e Artes, adotando uma metodologia diferente da convencional, para despertar, no aluno, o gosto pela disciplina e o desenvolvimento de uma habilidade pouco trabalha...

  14. Ensinar e aprender na Bíblia

    OpenAIRE

    Tércio Machado Siqueira

    2011-01-01

    Ensinar e aprender na BíbliaTeaching and learning in the BibleEnseñanza y el aprendizaje de la BibliaRESUMOEste artigo analisa o conceito de ensinar e aprender na Bíblia a partir das expressões hebraicas lamad e yarah, para, posteriormente, discutir a possibilidade de uma pedagogia libertadora e como aplicá-la, tendo como ponto de partida o ensino no Antigo Testamento.ABSTRACTThis article analyzes the concept of teaching and learning in the Bible based on the Hebrew expressions lamad and yara...

  15. ROČNA ZASTAVNA PRAVICA NA PREMIČNINAH

    OpenAIRE

    Benko, Ana

    2013-01-01

    Ročna zastavna pravica na premičninah (pignus) je oblika zavarovanja terjatev, pri kateri je dodatno jamstvo za izpolnitev dolžnikove obveznosti vrednost zastavljene stvari. Bistvena značilnost ročne zastavne pravice na premičninah je njena posestnost. O posesti oziroma neposesti govorimo z vidika zastavnega upnika. Po vsebini je ročna zastavna pravica podobna pridržni (retencijski) pravici. Njen predmet je lahko vsaka premična stvar, ki je v pravnem prometu in ima neko prometno vrednost. Je ...

  16. Kusheh, na minem Fatu, en mi na koko farmer Hello, I am Fatu and I am a cocoa farmer

    NARCIS (Netherlands)

    Witteveen, L.M.; Goris, Margriet; Lie, R.; Ingram, V.J.

    2016-01-01

    This document reports on the development of a prototype Digital Farmer Field School (DFFS) called Kusheh, na minem Fatu, en mi na koko farmer (“Hello, I am Fatu and I am a cocoa farmer”). The DFFS provides an ICT-based alternative to traditional agricultural extension. More specifically, it offers a

  17. SODOBNI PLES NA SLOVENSKEM

    OpenAIRE

    Marinko, Jožica

    2013-01-01

    Diplomsko delo predstavlja temo sodobni ples na Slovenskem. Podrobneje je predstavljena zgodovina sodobnega plesa v Sloveniji − od prvih zacetkov, pa do danes. Predstavljene so pomembne osebnosti, ki so sodobnemu plesu utrle pot in mu pomagale, da je iz zacetnega ljubiteljstva prerasel v profesionalnost. Navedene so težave, s katerimi so se spopadali sodobni plesalci, in težave, s katerimi se spopadajo še danes. Izpostavljen je problem šolanja plesalcev, predstavljena so dru...

  18. Cuba na OEA

    Directory of Open Access Journals (Sweden)

    Antônio Carlos Lessa

    2009-06-01

    Full Text Available A Organização dos Estados Americanos abriu caminho para o possível retorno de Cuba à organização, pondo fim à medida que por 47 anos baniu os países comunistas e era o mais importante sinal do isolamento de Cuba na região. 

  19. Prostorsko združevanje lovišč glede na biomaso divjadi: Spatial integration of hunting areas based on wild game biomass:

    OpenAIRE

    Koren, Iztok

    2010-01-01

    This work deals with the spatial integration of hunting areas based on wild game biomass by means of ordering. We carried out combining of hunting areas for the periods 1951-1960 and 1994-2003 in Tolmin forest management area in northwest Slovenia. We combined hunting areas into two groups in the first period and into four groups in the second period. Distribution of hunting areas in the first period is characterized by hare (Lepus europaeus P.) and in the second period by wild boar (Sus scro...

  20. Eletrencefalograma na síndrome parkinsoniana

    Directory of Open Access Journals (Sweden)

    José Geraldo Camargo Lima

    1973-09-01

    Full Text Available Foram estudados os eletrencefalogramas de 50 pacientes parkinsonianos livres de qualquer antecedente convulsivo, sendo registrados traçados anormais em 40% dos casos. A incidência de traçados anormais foi maior na síndrome parkinsoniana bilateral do que na unilateral (52% e 25%, respectivamente. Entre as anormalidades assinaladas foram as paroxísticas as mais freqüentes (65% dos casos, caracterizando-se predominantemente por surtos de ondas teta. O registro de anormalidades paroxísticas do tipo irritativo encontrado em três casos é salientado. Alterações da atividade de base foram assinaladas em 35% dos pacientes. A idade dos pacientes não parece ter tido importante papel na gênese das anormalidades eletrencefalográficas.

  1. Kotelny na biomasu

    OpenAIRE

    Egerle, Dušan

    2013-01-01

    Projekt řeší vytápění a přípravu teplé vody pro bytový dům v Chocni (Pardubický kraj). Bytový dům má tři nadzemní vytápěná podlaží a jedno podzemní nevytápěné podlaží. Zdrojem tepla je zplynovací kotel na dřevo, resp. kotel na pelety, který zároveň slouží pro přípravu teplé vody v zimním období, po ostatní část roku jsou na přípravu teplé vody nainstalovány solární kolektory. Zdroj tepla je umístěn v oddělené a samostatně přístupné místnosti, v kotelně....

  2. Cenzura na Internetu

    OpenAIRE

    Žila, Milan

    2011-01-01

    Tato práce se zabývá problémem cenzury na internetu v Číně. Práce popisuje formy a způsoby internetové cenzury v Číně. Zároveň uvádí i možnosti zjištění, ověření a obcházení cenzury pomocí různých nástrojů, aplikací a internetových služeb. Práce obsahuje výsledky provedených testů určených k ověření a zjištění cenzurovaných webových stránek a klíčových slov z různých lokací v Číně. Na základě těchto testů jsou vyvozeny závěry o cenzuře na internetu v Číně. This thesis deals with the p...

  3. Na trilha do gênero: pentecostalismo e CEBs On the gender track: pentecostal groups and the christian base communities CEBs

    Directory of Open Access Journals (Sweden)

    Márcia Thereza Couto

    2002-07-01

    Full Text Available O trabalho discute a forma como a perspectiva de gênero tem sido incorporada no âmbito dos estudos sobre dois grupos religiosos que nas duas últimas décadas têm mobilizado a atenção de cientistas sociais no Brasil e em outros países da América Latina: os pentecostais e as Comunidades Eclesiais de Base (CEBs. Por meio da leitura atenta de expressivos trabalhos sobre esses grupos com enfoque nos referenciais de gênero e pobreza, a autora argumenta que o caminho trilhado rumo a uma perspectiva analítica de gênero nesses campos ainda exige das/dos estudiosas/os uma longa empreitada, embora o esforço e a coerência do trabalho nessa direção sejam consideráveis.The present study discusses the incorporation of a gender perspective to the study of two religious groups that for the last two decades have called the attention of social scientists in Brasil and in other Latin American countries: the Pentecostal groups and the Comunidades Eclesiais de Base (CEBs. Researching relevant studies about these groups, focusing on gender and poverty, the author argues that, although the effort and coherence of recent research are considerable, the deployment of a gender perspective is still very incipient and deserves closer attention.

  4. 基于社会公平的农村贫困治理%The Rural Poverty GoverNaNce based oN Social Equality

    Institute of Scientific and Technical Information of China (English)

    张丽新

    2015-01-01

    实现社会公平的农村贫困治理是现代政府不可推卸的责任,我国实现社会公平的农村贫困治理面临诸多问题。应发挥社会资本参与农村贫困治理的作用,深入探寻政府、社会组织共同参与的多元化贫困治理模式。%To actualize the rural poverty governance based on social equality is an inescapable responsibility of modern government,and lots of problems are faced in our country realizing the rural poverty governance based on social equality. We should bring the function of social capital in rural poverty governance into real play,and deeply explore in the pluralistic poverty governance pattern with joint participation of the government and social organizations.

  5. Comportamento espectral dos solos na paisagem a partir de dados coletados por sensores terrestre e orbital Spectral response of soils in the landscape based on terrestrial and orbital data acquisition levels

    Directory of Open Access Journals (Sweden)

    José Geraldo de Abreu Sousa Junior

    2008-04-01

    Full Text Available Parte da variabilidade dos índices de produção agrícola está associada com as características do solo e da paisagem. Dessa forma, práticas de manejo, como a adubação, devem levar em consideração esta variabilidade. O sensoriamento remoto é uma ferramenta que pode fornecer, de maneira rápida, informações para o manejo do solo, pois relaciona a radiação eletromagnética com os atributos do solo. Assim, este trabalho teve como objetivo avaliar o comportamento espectral, em dois níveis de aquisição de dados (terrestre e orbital, de diferentes classes de solos ao longo de toposseqüências na região de São Carlos e Ibaté, SP. Para isso, amostras de terra georreferenciadas foram coletadas em 319 pontos, em três profundidades. Em seguida, obtiveram-se os dados radiométricos em laboratório, na faixa espectral entre 450 e 2.500 nm. Os mesmos locais amostrados na camada superficial, no campo, foram avaliados na imagem de satélite. A partir dos resultados obtidos, pode-se concluir que: (a teores de areia grossa, argila e matéria orgânica, e cor tiveram relação com a reflectância dos solos; (b ao longo das vertentes ocorrem variações nos dados espectrais dos solos; e (c solos da mesma ordem taxonômica, porém com classes texturais diferentes, apresentam diferentes comportamentos espectrais, podendo ser discriminados por sensoriamento remoto.Part of agricultural production index variability is associated with soil and landscape characteristics. Management practices such as fertilizer application should therefore take the soil spatial variability into account. Remote sensing is a tool that can provide faster information for soil management because it relates electromagnetic radiation with soil attributes. Thus, this study aimed at evaluating the spectral response, at two data acquisition levels (terrestrial and orbital, of different soil classes across toposequences in the region of São Carlos and Ibaté, SP. For this

  6. Exigência de treonina, com base no conceito de proteína ideal, de alevinos de tilápia-do-nilo Digestible threonine requirement of Nile tilapia fingerlings using ideal protein concept

    Directory of Open Access Journals (Sweden)

    Marcos Antonio Delmondes Bomfim

    2008-12-01

    Full Text Available Avaliou-se o efeito dos níveis de treonina digestível, com base no conceito de proteína ideal, em rações com 1,35% de lisina digestível sobre o desempenho de alevinos de tilápia-do-nilo (Oreochromis niloticus. Utilizaram-se 432 alevinos revertidos de tilápia, linhagem tailandesa, com peso inicial de 1,64 ± 0,03 g, em delineamento inteiramente ao acaso, com seis tratamentos, cada um com seis repetições, e doze peixes por unidade experimental. Os tratamentos consistiram de cinco rações com diversas relações treonina:lisina digestível (69,0; 74,0; 79,0; 84,0 e 89,0% e relação metionina + cistina:lisina digestível de 70,0% e uma ração com relação treonina:lisina digestível de 84,0% e de metionina + cistina:lisina digestível de 75,0%, todas isoenergéticas e isoprotéicas. Os peixes foram mantidos em 36 aquários de 130 L, dotados de abastecimento de água, temperatura controlada e aeração individuais, e alimentados à vontade, seis vezes ao dia, durante 30 dias. Avaliaram-se o desempenho, a composição corporal, as deposições de proteína e gordura e a eficiência de retenção de nitrogênio dos peixes. O consumo de ração, o teor de proteína corporal e a deposição de proteína corporal aumentaram de forma linear de acordo com a relação treonina:lisina na ração, contudo, não foram influenciados pelo aumento da relação metionina + cistina:lisina da ração. Os níveis de treonina total ou digestível que proporcionaram os melhores resultados de desempenho em alevinos de tilápia-do-nilo foram de 1,11 e 0,99%, enquanto os níveis que promoveram melhor deposição de proteína corporal foram de 1,43 e 1,28%, que correspondem às relações treonina:lisina total de 71,0 e 69,0% e treonina:lisina digestível de 90,0 e 89,0%.The effects of digestible threonine levels, based on ideal protein concept in diets with 1.35% of digestible lysine on Nile tilapia (Oreochromis niloticus fingerlings performance. Four hundred

  7. Flexible High-Performance Lead-Free Na0.47K0.47Li0.06NbO3 Microcube-Structure-Based Piezoelectric Energy Harvester.

    Science.gov (United States)

    Gupta, Manoj Kumar; Kim, Sang-Woo; Kumar, Binay

    2016-01-27

    Lead-free piezoelectric nano- and microstructure-based generators have recently attracted much attention due to the continuous demand of self-powered body implantable devices. We report the fabrication of a high-performance flexible piezoelectric microgenerator based on lead-free inorganic piezoelectric Na0.47K0.47Li0.06NbO3 (NKLN) microcubes for the first time. The composite generator is fabricated using NKLN microcubes and polydimethylsiloxane (PDMS) polymer on a flexible substrate. The flexible device exhibits excellent performance with a large recordable piezoelectric output voltage of 48 V and output current density of 0.43 μA/cm(2) under vertical compressive force of 2 kgf, for which an energy conversion efficiency of about 11% has been achieved. Piezoresponse and ferroelectric studies reveal that NKLN microcubes exhibited high piezoelectric charge coefficient (d33) as high as 460 pC/N and a well-defined hysteresis loops with remnant polarization and coercive field of 13.66 μC/cm(2) and 19.45 kV/cm, respectively. The piezoelectric charge generation mechanism from NKLN microgenerator are discussed in the light of the high d33 and alignment of electric dipoles in polymer matrix and dielectric constant of NKLN microcubes. It has been demonstrated that the developed power generator has the potential to generate high electric output power under mechanical vibration for powering biomedical devices in the near future. PMID:26735739

  8. Redução da proteína em dietas para tilápias-do-nilo por meio da suplementação de aminoácidos com base no conceito de proteína ideal Protein reduction in diets for Nile tilapia by amino acids supplementation based on the ideal protein concept

    OpenAIRE

    José Sérgio Righetti; Wilson Massamitu Furuya; Celso Ivan Conejero; Thêmis Sakaguti Graciano; Luiz Vítor Oliveira Vidal; Mariana Michellato

    2011-01-01

    Este trabalho foi realizado para avaliar os efeitos da redução da proteína da dieta, por meio da suplementação com aminoácidos sintéticos, sobre o desempenho produtivo, a digestibilidade e o diâmetro da fibra muscular de tilápias-do-nilo. Os aminoácidos (lisina, metionina, treonina e arginina) foram suplementados de forma a manter o perfil de aminoácidos da dieta-referência. Foram utilizados 160 peixes com peso vivo médio inicial de 105,7 ± 2,5 g, distribuídos em 16 tanques (1 m³ cada) e alim...

  9. Evolution of Microstructure in Rolled Mg-Based Alloy. Textural Aspect / Ewolucja Mikrostruktury W Walcowanym Stopie Na Bazie Mg. Aspekt Teksturowy

    Directory of Open Access Journals (Sweden)

    Drzymała P.

    2015-12-01

    Full Text Available Magnesium alloys are the lightest structural materials, which makes them particularly suitable for use in the aircraft and automotive industry. However, due to hexagonal close-packed crystal structure, resulting in insufficient number of independent slip systems, magnesium alloys exhibit poor formability at room temperature. Conventional methods of work hardening of magnesium alloys requires the temperature about 300°C, which favours simultaneously processes of thermal recovery and grain growth, but decreases beneficial microstructure strengthening effect. Thus, it is a crucial to undertake development of a technology for semi-finished magnesium alloys elements, which will ensure better mechanical properties of the final products by forming desirable microstructure. In the paper we present the development of crystallographic texture of the Mg-based alloy (Mg-AZ31 in the form of pipe extruded at 430°C and subjected to pilger rolling at relatively low temperature.

  10. Development of parallel GPU based algorithms for problems in nuclear area; Desenvolvimento de algoritmos paralelos baseados em GPU para solucao de problemas na area nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Adino Americo Heimlich

    2009-07-01

    Graphics Processing Units (GPU) are high performance co-processors intended, originally, to improve the use and quality of computer graphics applications. Since researchers and practitioners realized the potential of using GPU for general purpose, their application has been extended to other fields out of computer graphics scope. The main objective of this work is to evaluate the impact of using GPU in two typical problems of Nuclear area. The neutron transport simulation using Monte Carlo method and solve heat equation in a bi-dimensional domain by finite differences method. To achieve this, we develop parallel algorithms for GPU and CPU in the two problems described above. The comparison showed that the GPU-based approach is faster than the CPU in a computer with two quad core processors, without precision loss. (author)

  11. As bases teóricas da técnica da recriação do contexto na entrevista cognitiva

    Directory of Open Access Journals (Sweden)

    Luciano Haussen Pinto

    2015-04-01

    Full Text Available In reporting a crime the victims and witnesses have a decisive role. In the area of psychology of testimony, much has been advanced in the methods of investigative interviews, being the Cognitive Interview currently the most consolidated around the world. The aim of this study was to perform a narrative review of the literature about one of the techniques of the Cognitive Interview: context reinstatement. Many studies attribute the success the Cognitive Interview has in optimizing the quantity and quality in recalled information largely to context reinstatement. The theoretical bases of memory were analyzed to explain the mechanisms context reinstatement triggers that favor recall. Its positive effects have direct relation with the notion of context-dependent memory and with the principle of encoding specificity. Finally, we point out some limitations, as well as new ways to use the technique.

  12. A proposal for positive cooperation in anion-cation binding in yttrium and lutetium complexes based on o-amino-substituted phenolate ligands. On the way to coordination polymers by self-assembly. Molecular structures of [ClLu(OAr)3Na] (X-ray) and [ClY(OAr')3Y(OAr')3Na] (X-ray and 89Y-NMR)

    NARCIS (Netherlands)

    Koten, G. van; Hogerheide, M.P.; Ringelberg, S.N.; Grove, D.M.; Jastrzebski, J.T.B.H.; Boersma, J.; Smeets, W.J.J.; Spek, A.L.

    1996-01-01

    Unique hetero(poly)metallic complexes [ClM(OAr)3Na] (M = Lu (3a), Y (3b)) and [ClY(OAr')3Y(OAr')3Na] (4) containing the bis (OAr = OC6H2(CH2NMe2)2-2,6-Me-4) and mono (OAr' = OC6H4(CH2NMe2)-2) o-amino-substituted phenolate ligands have been synthesized and characterized by NMR (1H, 13C, and 89Y) and

  13. A participação no processo decisório: um estudo na economia solidária Participation in the decision making process: a study in a solidarity-based economy association

    Directory of Open Access Journals (Sweden)

    Beatriz Centenaro Hellwig

    2007-12-01

    Full Text Available O presente artigo tem por objeto de estudo a participação e, por cenário, a Economia Popular e Solidária, essa forma de fazer econômico que tem por essência a valorização do trabalho sobre o capital, além das relações de trabalho ancoradas na autogestão, e que cultiva como princípio fundamental a solidariedade. Trata-se de uma pesquisa exploratória, baseada em estudo de caso único. A organização onde foi realizado o estudo é uma das treze associações responsáveis pela triagem de resíduos sólidos do Sistema Integrado de Resíduos Sólidos (GIRS, implantado pela Prefeitura Municipal de Porto Alegre em 1989, conforme o princípio da EPS. A análise dos dados revelou, entretanto, um modelo autocrático de gestão e baixo comprometimento dos associados, assim como o fato de que o trabalho é vivenciado como um meio de sobrevivência como outro qualquer. Já as relações entre os trabalhadores são pautadas pela desconfiança e pela competição, fatores que podem estar na origem das elevadas taxas de turnover e do baixo índice de produtividade constatados. Entre as conclusões deste estudo está o reconhecimento da complexidade de reconstruir o laço social.Participation in the decision making process was studied in the scenario of a solidarity-based economy association where work is valued above capital; work relations are anchored in self-management and solidarity is cultivated as a fundamental principle. Exploratory research was done in one of the thirteen associations responsible for solid waste salvage in the Integrated Solid Waste System implemented by the Porto Alegre City Hall in 1989 according to the solidarity-based economy principle. However analysis disclosed an autocratic model of management and limited commitment by associates. Work was considered to be a means of survival, no different from any other. Since relations among the workers are characterized by mistrust and competition, these may be the origin of the

  14. UM ESTUDO DAS EMPRESAS LISTADAS NA BM&FBOVESPA DO SETOR DE CONSTRUÇÃO CIVIL ACERCA DO RECONHECIMENTO DAS RECEITAS E DOS CUSTOS COM BASE NO CPC 17

    Directory of Open Access Journals (Sweden)

    Wenner Glaucio Lopes Lucena

    2015-01-01

    Full Text Available O objetivo deste artigo é verificar se as empresas do setor de construção civil reconhecem não só suas receitas como também seus custos com base no Pronunciamento Técnico CPC 17: contratos de construção. Para isso, foi realizada uma análise de conteúdo nas notas explicativas, do período de 2009 e 2010, de 22 empresas do setor de construção civil listadas na BM&FBovespa a fim de investigar se estas estão atendendo os requisitos do CPC 17 em relação ao reconhecimento das receitas e custos. Esta pesquisa é classificada como qualitativa, quantitativa, descritiva e documental. Nos achados foram encontrados que 100% das empresas não apresentaram a modalidade de costplus, porém 68% utilizam o método da percentagem completada (POC. Segundo esse método, a receita contratual deve ser proporcional aos custos contratuais incorridos em cada etapa de medição. Os resultados demonstram que 41% das empresas apresentaram os valores dos custos de mão de obra no local da execução do contrato, incluindo sua supervisão e os custos de materiais usados na construção. Dessa forma, conclui-se que 59% atenderam a dois dos subitens analisados no que tange ao reconhecimento dos custos, no entanto mais de 50% atenderam aos requisitos da OCPC 01, que trata da formação do custo do imóvel, objeto da incorporação imobiliária. Por fim, quanto à divulgação das informações, observou-se que nenhuma das empresas divulga suas receitas e custos com base nos subitens do CPC 17. Portanto, o resultado das empresas pode se mostrar diferente do que realmente deveria ser para efeito de tributação.

  15. Exploring the Potential of Integral Field Spectroscopy Observing Extrasolar Planet Transits: Ground Based Observations of the Atmospheric Na in HD209458b

    CERN Document Server

    Arribas, S; Sparks, W B; López-Martin, L; Mediavilla, E; Gomez-Alvarez, P; Arribas, Santiago; Gilliland, Ronald L.; Sparks, William B.; Lopez-Martin, Luis; Mediavilla, Evencio; Gomez-Alvarez, Pedro

    2005-01-01

    We explore the use of Integral Field Spectroscopy (IFS) to observe extrasolar planet transits. Although this technique should find its full potential in space observations (e.g. JWST, TPF), we have tested its basics with ground based time series observations of HD209458b obtained with WHT+INTEGRAL during a transit. For this analysis we used 5550 spectra, obtained in 150 exposures during a period of >7 hours. We found that IFS offers 3 fundamental advantages with respect to previously used methods. (i) It improves the effective S/N in photon limited observations by distributing the light coming from the star into the 2 dimensions of the detector. (ii) This type of IFS data allows to 'auto-calibrate' instrumental and background effects. (iii) Since the star image characteristics as well as its photometric properties are extracted from the same data-cube, it is possible to decorrelate photometric instabilities induced by PSF variations. These data have also allowed us to explore the accuracy limits of ground bas...

  16. Impact of HIV-1 reverse transcriptase polymorphism F214L on virological response to thymidine analogue based regimens in ART-naïve and experienced patients

    DEFF Research Database (Denmark)

    Silberstein, F; Cozzi-Lepri, A; Ruiz, L;

    2007-01-01

    BACKGROUND: A negative association between the polymorphism F214L and type 1 thymidine analogue (TA) mutations (TAMs) has been observed. However, the virological response to TAs according to the detection of F214L has not been evaluated. METHODS: We studied 590 patients from EuroSIDA who started TA...... therapy for the first time as part of potent combination antiretroviral therapy (cART) and who were tested for genotypic resistance within the past 6 months. End points were median reduction in the week 24 viral load and time to virological failure (2 consecutive VL measurements >400 copies/mL after at...... least 6 months of the TA-containing cART). RESULTS: In ART-naive patients, the prevalence of F214L was 17%. By 48 months after starting TA-based cART, the proportion of patients who experienced virological failure was 16% in patients with 214L and 36% in those with 214F (P=.03). In a multivariable Cox...

  17. Development of Web based system for individual internal monitoring programme; Desenvolvimento de um sistema baseado na Web para suporte ao programa de monitoracao individual interna do IPEN

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Vanessa Rogeria de

    2007-07-01

    The purposes of the internal monitoring, in general, are to verify and document that each worker is protected adequately against risks from radionuclide intakes and the protection complies with legal requirements. Therefore, an overall radiation protection programme, starts with an assessment to identify work situations in which there is a risk of internal contamination of workers and to quantify the likely intake of radioactive material and the resulting committed effective dose. As a part of a continuous improvement of the monitoring programme for occupationally exposed workers at IPEN, it is being developed a Web based system to access the internal dosimetry database. The system was implemented using Hypertext Preprocessor, PHP, and a PostgreSQL database. This system will introduce a new paradigm in the routine of the internal dosimetry service, providing a fast access to the information among the measurement laboratories staff, dose evaluation group and the radiation protection supervisor. The database maintains information about worker identification, physical and chemical characteristics of the radionuclide, type of monitoring, measurement data and the dose. Moreover, this information will be readily available to provide support for regulatory compliance and quality control requirements. (author)

  18. Na/beta-alumina/NaAlCl4, Cl2/C circulating cell

    Science.gov (United States)

    Cherng, Jing-Yih; Bennion, Douglas N.

    1987-01-01

    A study was made of a high specific energy battery based on a sodium negative electrode and a chlorine positive electrode with molten AlCl3-NaCl electrolyte and a solid beta alumina separator. The basic performance of a Na beta-alumina NaAlCl4, Cl2/C circulating cell at 200 C was demonstrated. This cell can be started at 150 C. The use of melting sodium chloroaluminate electrolyte overcomes some of the material problems associated with the high working temperatures of present molten salt systems, such as Na/S and LiAl/FeS, and retains the advantages of high energy density and relatively efficient electrode processes. Preliminary investigations were conducted on a sodium-chlorine static cell, material compability, electrode design, wetting, and theoretical calculations to assure a better chance of success before assembling a Na/Cl2 circulating cell. Mathematical models provide a theoretical explanation for the performance of the NaCl2 battery. The results of mathematical models match the experimental results very well. According to the result of the mathematical modeling, an output at 180 mA/sq cm and 3.2 V can be obtained with optimized cell design.

  19. Reflexões sobre precoces, prodígios, gênios e as altas habilidades, com base na neurociência cognitiva

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Paulino

    2011-10-01

    Full Text Available Em Educação Especial, altas habilidades designam pessoas que demonstram capacidades, potenciais ou desempenho, em atividades humanas, bem acima da média. Objetivamos, utilizando-se da neurociência, entender os precoces, prodígios, gênios e altas habilidades como resultantes de um processo único das formações da memória. Trata-se de uma pesquisa bibliográfica, em que as obras foram identificadas, localizadas, compiladas, fichadas e analisadas. O material foi localizado a partir de palavras-chave em bases de dados. Para a compilação, foram utilizados, como critério de inclusão, a intersecção dos unitermos adotados, bem como os trabalhos de pesquisadores da educação, psicologia e neurociência, publicados entre 1966 e 2009. Analisamos qualitativamente 40 referências, sendo 18 artigos e 22 outros textos. A trajetória de análise foi desenvolvida tendo a questão norteadora: há necessidade de se explicar diferentemente os precoces, prodígios, gênios e as AH? Chegamos a três proposições lógicas. Procuramos demonstrar, por meio desse exercício lógico, que não haveria necessidade de se explicar diferentemente os precoces, prodígios, gênios e as AH, mas concluímos que há necessidade de tais diferenciações, mesmo dentro da área da neurociência, no entanto, a demonstração acima aponta para a teoria de Renzulli como válida para gênios e AH, com ressalvas para precoces e prodígios, que merecem um olhar mais aprofundado.Palavras-chave: Altas habilidades. Memória. Neurociência cognitiva. Neurotransmissores.

  20. A aprendizagem baseada em problemas na promoção da educação continuada com a equipe de enfermagem = The problem-based learning promoting the continuing education with the nursing team

    Directory of Open Access Journals (Sweden)

    Mileni Francisca Gomes Souza

    2011-07-01

    Full Text Available A educação para capacitar de maneira crítica e reflexiva a equipe de enfermagem no seu processo de trabalho motivou este estudo. O objetivo foi analisar a percepção dos profissionais de enfermagem sobre a viabilidade da utilização da aprendizagem baseada em problemas no contexto da educação continuada. Utilizou-se uma oficina sobre educação continuada com uma equipe de enfermagem, percorrendo a proposta metodológica do ‘Arco de Marguerez’, em que a realidade/problema foi a realização de uma técnica de curativo na unidade de saúde. Os dados foram obtidos com o auxílio de um roteiro semiestruturado, aplicado após a oficina, pelo método de grupo focal, em que os participantes com o auxílio do pesquisador expuseram suas percepções sobre a estratégia proposta. Os conteúdos dos diálogos foram gravados e posteriormente transcritos para análise de conteúdo. Os resultados sugerem repensar as estratégias na educação continuada para enfermagem, de maneira a proporcionar que cada profissional seja capaz de identificar os desafios na sua realidade a serem superados e contribuir para a mudança no âmbito pessoal e social. Infere-se a necessidade da constante atualização dos profissionais de enfermagem o que pode ser alcançado pela educação continuada com a equipe, em que a aprendizagem baseada em problemas mostrou-se satisfatória.The education to enable critically and reflectively the nursing team during work process motivated this study. The objective was to analyze the perception of nursing professionals on the feasibility of using problem-based learning in the context of continuing education. We used a workshop on continuing education with a nursing team, covering the methodological proposal of the ‘Arc of Marguerez’, where the reality/problem was to hold a healing technique in the health unit. Data was obtained with the aid of a semi-structured script, applied after the workshop, through the focus group method

  1. Psicoterapia baseada na mentalização de crianças que sofreram maus-tratos Psicoterapia basada el la mentalización de niños que fueron maltratados The mentalization-based treatment of children who were maltreated

    OpenAIRE

    Vera Regina Röhnelt Ramires; Lucia Rech Godinho

    2011-01-01

    Este estudo investigou a possibilidade de desenvolvimento da capacidade de mentalização na psicoterapia de crianças que sofreram maus-tratos. Com base na vertente psicanalítica da teoria do apego e nos estudos sobre função reflexiva e capacidade de mentalização, foi realizado um estudo qualitativo, pautado pelo método clínico. O procedimento adotado foi o Estudo de Casos Múltiplos, e os participantes, duas meninas de 10 e 12 anos de idade e seus cuidadores. Os instrumentos utilizados para a c...

  2. Programa de Saúde da Família: uma avaliação de efetividade com base na percepção de usuários Family Health Program: effectiveness assessment based on user perception

    Directory of Open Access Journals (Sweden)

    Ana Katarina Pessoa de Oliveira

    2008-04-01

    Full Text Available Este artigo apresenta os resultados de uma pesquisa que relaciona a percepção dos usuários sobre a contribuição do Programa de Saúde da Família (PSF, na Unidade Mista de Felipe Camarão, Distrito Oeste de Natal, Rio Grande do Norte, com a evolução dos indicadores de atenção à saúde da criança menor de cinco anos, no período de 2000 a 2004. Inicialmente foi realizado um levantamento de dados sobre a política de saúde implementada, incluindo um perfil dos usuários envolvidos. Depois, uma consulta às estatísticas disponíveis, contidas em documentos oficiais do Ministério da Saúde e da Secretaria Municipal de Saúde de Natal, referentes às ações desenvolvidas na área da saúde da criança no período considerado. Por fim, aplicou-se um questionário de pesquisa social a uma amostra de famílias com crianças menores de cinco anos, cadastradas na unidade mista, para conhecer o seu grau de satisfação com os serviços recebidos. A comparação do nível de satisfação dos usuários com a evolução das estatísticas revelou que as ações de atenção à saúde da criança do PSF, no órgão público considerado, foram transformadoras de atitudes e propulsoras de mudanças sociais.This article presents the results of a study to identify in what extent user perception of the contribution of the Family Health Program (Programa de Saúde da Família, PSF, at the Felipe Camarão Unit, in the West District of Natal (state of Rio Grande do Norte, Brazil reflects the evolution of the healthcare indicators for children under five, in the period between 2000 and 2004. Initially data on the implemented health policy was gathered, including a profile of the users involved. Then the available statistics related to the child healthcare measures carried out during that period were obtained from official documents of the federal and municipal Health Department. Finally a social survey questionnaire was applied to a sample of families

  3. Grades computacionais na recuperação de imagens médicas baseada em conteúdo Grid computing in the optimization of content-based medical images retrieval

    Directory of Open Access Journals (Sweden)

    Marcelo Costa Oliveira

    2007-08-01

    Full Text Available OBJETIVO: Utilizar o poder de processamento da tecnologia de grades computacionais para viabilizar a utilização do algoritmo de medida de similaridade na recuperação de imagens baseada em conteúdo. MATERIAIS E MÉTODOS: A técnica de recuperação de imagens baseada em conteúdo é composta de duas etapas seqüenciais: análise de textura e algoritmo de medida de similaridade. Estas são aplicadas em imagens de joelho e cabeça, nas quais se avaliaram a eficiência em recuperar imagens do mesmo plano e a seqüência de aquisição em um banco de 2.400 imagens médicas para testar a capacidade de recuperação de imagens baseada em conteúdo. A análise de textura foi utilizada inicialmente para pré-selecionar as 1.000 imagens mais semelhantes a uma imagem de referência escolhida por um clínico. Essas 1.000 imagens foram processadas utilizando-se o algoritmo de medida de similaridade na grade computacional. RESULTADOS: A precisão encontrada na classificação por análise de textura foi de 0,54 para imagens sagitais de joelho e de 0,40 para imagens axiais de cabeça. A análise de textura foi útil como filtragem, pré-selecionando imagens a serem avaliadas pelo algoritmo de medida de similaridade. A recuperação de imagens baseada em conteúdo utilizando o algoritmo de medida de similaridade aplicado nas imagens pré-selecionadas por análise de textura resultou em precisão de 0,95 para as imagens sagitais de joelho e de 0,92 para as imagens axiais de cabeça. O alto custo computacional do algoritmo de medida de similaridade foi amortizado pela grade computacional. CONCLUSÃO: A utilização da abordagem mista das técnicas de análise de textura e algoritmo de medida de similaridade no processo de recuperação de imagens baseada em conteúdo resultou em eficiência acima de 90%. A grade computacional é indispensável para utilização do algoritmo de medida de similaridade na recuperação de imagens baseada em conteúdo, que de

  4. Miocardiopatia dilatada na infancia

    OpenAIRE

    Madureira, José Rubens Alcantara

    2013-01-01

    Resumo: Com objetivo de estudar a evolução e obter informações prognosticas da Miocardiopatia Dilatada na infância. Foram Estudados 70 pacientes internados no Centro de Cardiologia Infantil do Paraná, do Hospital infantil Pequeno Príncipe, em Curitiba, no período de Janeiro de 1985 a janeiro de 1995. Todos os pacientes foram internados por ocasião da primeira consulta hospitalar, tendo sido realizados exame clínico, radiografia de tórax, eletrocardiograma e ecocardiograma regularmente, no int...

  5. Highlights from NA60

    CERN Document Server

    De Falco, A; Banicz, K; Borer, K; Castor, J; Chaurand, B; Chen, W; Cicalò, C; Colla, A; Cortese, P; Damjanovic, S; David, A; Devaux, A; Ducroux, L; Enyo, H; Fargeix, J; Ferretti, A; Floris, M; Force, P; Förster, A; Guettet, N; Guichard, A; Gulkanian, H R; Heuser, J; Keil, M; Kluberg, L; Li, Z; Lourenço, C; Lozano, J; Manso, F; Martins, P; Masoni, A; Neves, A; Ohnishi, H; Oppedisano, C; Parracho, P; Pillot, P; Poghosyan, T; Puddu, G; Radermacher, E; Ramalhete, P; Rosinsky, P; Scomparin, E; Seixas, J; Serci, S; Shahoyan, R; Sonderegger, P; Specht, H J; Tieulent, R; Usai, G; Veenhof, R; Wöhri, H

    2009-01-01

    NA60 measured dimuon production in p-A and In-In collisions at the CERN SPS. This paper presents a high statistics measurement of $\\phi$ meson production in In-In collisions at 158 AGeV. Both the transverse momentum, rapidity, decay angular distributions and the absolute yield were measured as a function of centrality. The results are compared to previous measurements in order to shed light on the long standing $\\phi$ puzzle. In addition, highlights on $\\eta$ meson production and on the dimuon excess below the J/$\\psi$ mass are presented.

  6. Stress laboral na PSP

    OpenAIRE

    Passeira, Andrea Verónica Vaz

    2011-01-01

    Dissertação de Mestrado em Segurança e Higiene no Trabalho O presente Estudo foi aplicado a profissionais da polícia do Comando Metropolitano de Lisboa da PSP. O objectivo principal subjacente a este trabalho foi proceder à análise da problemática do stress, nos profissionais da PSP que constituem a nossa amostra. Para tal, a metodologia utilizada consistiu na aplicação de um conjunto de Questionários, designadamente, “Fontes de Stress”, “Sintomas de Stress”, “Estratégias de C...

  7. O tempo na geografia

    OpenAIRE

    Salvador, Regina

    1998-01-01

    O conceito de tempo está intrinsecamente relacionado com o desenvolvimento do pensamento humano, nas suas produções humanísticas e científicas. Encontramo-lo já nos textos sagrados das "grandes religiões do Livro", como por exemplo, no "Eclesiastes" do Antigo Testamento. O "tempo da criação", a "cronologia" e a "duração" constituem categorias, tanto das Ciências Formais como das Ciências da Natureza. O tempo na Geografia é também um produto das categorias gerais acima ...

  8. Rawls na planini?

    OpenAIRE

    Kurelić, Zoran

    1994-01-01

    Autor prikazuje komunitarističku kritiku Rawlsa, prije svega u obliku koji je izložio Michael Walzer u knjizi "Spheres of Justice". Glavni prigovor Walzera i drugih komunitaraca Rawlsovoj teoriji pravednosti da je ona objektivistička i da stoga predstavlja modernu varijantu platoizma. Nasuprot takvoj poziciji, Walzer inzistira na teoriji pravednosti koja polazi od partikularnih vrijednosti pojedinačnog društva i kulture, te sam nastoji formulirati kritiku američkog društva kao zajednice podvr...

  9. La asociacion Monzonitica del Domo Anatectico del Tormes: geoquimica y petrogenesis

    Directory of Open Access Journals (Sweden)

    López Plaza, M.

    2001-08-01

    Full Text Available In certain peripheral zones of the Anatectic Tormes Dome there exists a group of rocks, which are from basic to acid as well as rich in alkali feldspar, apatite and allanite. Such an unusual mineralogy makes the rocks to be enriched in K20, P2O5, LREE and other elements of low ionic potential. Their geochemical signature is related to the volcanic shoshonites, to the vaugnerites of the French Central Massif as well as to the monzonitic series of Ballon, being, in turn, almost exceptional in the iberian variscan. The least evolved terms are rather fractionated, therefore, they are not primary melts. During the differentiation, the saturation of accessory phases such as apatite, allanite and zircon exerts an important effect in the evolution of the residual liquid giving rise to an inflection point in the Harker diagrams. From the good adjustments obtained in mass balance and Rayleigh fractionation modelling, we can infer that the process of fractional crystallization is the dominant one. In this respect, the porphyritic granitoids can be derived from a liquid of monzodioritic composition, being rocks genetically to the associated acid rocks. The corroded cores of plagioclase and the spatial relations suggest the existence of different pulses of magma from basic to acid coming from the same magmatic chamber.En dos bandas del Domo anatéctico del Tormes aparece un conjunto de rocas plutónicas desde básicas a ácidas ricas en feldespato potásico, apatito y allanita. Esta mineralogía tan particular hace que estén enriquecidas en K20, P205, LREE y otros elementos de bajo potencial iónico. Su quimismo es afín a las shoshonitas volcánicas, a las vaugneritas del Macizo Central francés y a las series monzoníticas de Ballon, siendo, a su vez, casi excepcional en el varisco ibérico. Los términos menos evolucionados están bastante fraccionados por lo que no se trata de fundidos primarios. Durante la diferenciación existen fases accesorias como apatito, allanita y circón cuya saturación ejerce un importante efecto en la evolución del líquido residual originando evoluciones quebradas en los diagramas de Harker. A partir de los buenos ajustes obtenidos con las modelizaciones por balance de masas y fraccionación Rayleigh se infiere que el proceso de cristalización fraccionada es el dominante. En este sentido, se pueden hacer derivar los granitoides porfídicos a partir de un líquido de composición monzodiorítica, por lo que no quedan desconectadas las rocas básicas de las ácidas asociadas. Los núcleos corroídos de plagioclasa y las relaciones espaciales parecen indicar que han existido distintos pulsos de magma desde básicos a ácidos procedentes de la misma cámara magmática.

  10. Principais características da raiz de cenoura na perspectiva de agentes da cadeia produtiva Main carrot root attributes based on stake holders perceptions

    Directory of Open Access Journals (Sweden)

    Silvia S Onoyama

    2011-09-01

    with closed questions about the importance of a range of attributes on a 1 (not important to 5 (very important scale. Statistic method based on categorical analysis was used to rank the attributes and calculate the average contrasts. The survey indicated that, according to consumers, nutritional value, texture, external color and taste are the most important attributes. In contrast, the other stake holders pay more attention to characteristics related to shape uniformity, external color and green shoulder. In addition, differences of perception by specific chain agents were detected, in special to the consumers group, affected by gender, age, educational level, marital status and supermarket location. These results are very important for directing carrot research projects, which must meet the productive sector and consumers requirements.

  11. Lead-free Mn-doped (K0.5,Na0.5)NbO3 piezoelectric thin films for MEMS-based vibrational energy harvester applications

    Science.gov (United States)

    Won, Sung Sik; Lee, Joonhee; Venugopal, Vineeth; Kim, Dong-Joo; Lee, Jinkee; Kim, Ill Won; Kingon, Angus I.; Kim, Seung-Hyun

    2016-06-01

    Lead-free Mn-doped (K0.5, Na0.5)NbO3 (KNN) thin films were fabricated by the chemical solution deposition method. The addition of small concentration of Mn dopant effectively reduced the leakage current density and enhanced the piezoelectric properties of the films. The leakage current density of 0.5 mol. % Mn-doped KNN film showed the lowest value of ˜10-7 A/cm2 at 10 V compared to the films with other doping concentrations and the piezoelectric d33 and e31 coefficients of this film were ˜90 pm/V and -8.5 C/m2, respectively. The maximum power and power density of the lead-free thin film-based vibrational energy harvesting device were 3.62 μW and 1800 μW/cm3 at the resonance frequency of 132 Hz and the acceleration of 1.0 G. The results prove that the 0.5 mol. % Mn-doped KNN film is an attractive candidate transducer layer for the piezoelectric MEMS energy harvesting device applications with a small volume and a long-lasting power source.

  12. Variabilidade genética de búfalos em rebanho-núcleo com base na análise de pedigree Genetic variability in water buffalo from nucleous herd by pedigree analysis

    Directory of Open Access Journals (Sweden)

    C.R. Marcondes

    2010-06-01

    Full Text Available Parâmetros baseados na probabilidade de origem do gene foram usados para descrever a variabilidade em uma população de búfalos da Embrapa Amazônia Oriental. A magnitude dos resultados foi de média a baixa (por volta de 20 animais, sugerindo que poucos fundadores contribuiriam para a formação da população. Dentre os 20 ancestrais que mais aportam genes aos machos - representando ao todo 71% dos alelos -, 39%, 26% e 5%, respectivamente, são as contribuições marginais das raças Murrah e Mediterrâneo e seus mestiços. Para as fêmeas, em que os 20 ancestrais aportam 67,5% dos genes, 42% e 26%, respectivamente, são as contribuições marginais das raças Murrah e Mediterrâneo.Parameters based on the probability of gene origin were used to describe genetic variability in a buffalo population from the Embrapa Amazônia Oriental, Belém, Pará, Brazil. The parameters generated medium to low values (around 20 animals and suggested low founder representativeness. From the 20 ancestors that gave more genes to males (with 71% of alleles, genetic contributions were 39%, 26%, and 5%, respectively, for Murrah, Mediterraneo, and crossbreds. For females, these values were 42% and 26% for Murrah and Mediterraneo breeds.

  13. Abordagens da produção científica em administração publicada na base Scopus à luz da teoria institucional, de 2000 a 2013

    Directory of Open Access Journals (Sweden)

    Sabrina do Nascimento

    2014-08-01

    Full Text Available O presente artigo teve como objetivo analisar a produção científica sobre Teoria Institucional indexada na base de dados Scopus voltada para a área de Administração, no período de 2000 a 2013. Evidenciou-se que: o autor mais prolífico sobre a temática da Teoria Institucional é Currie, G.; as universidades com maior publicação foram a University of Alberta e University of Nottingham. No cenário nacional, duas revistas aparecem, a RAE – Revista de Administração de Empresas e a Revista de Administração pública; já no cenário internacional, as revistas que possuem maior destaque são a Human Relations, o Journal of Business Ethics, o Business Strategy and the Environment e Critical Perspectives on Accounting. A área do conhecimento que aborda a Teoria Institucional é predominante nas ciências sociais e corresponde a 40,4% do total.

  14. Revestimento ativo de amido na conservação pós-colheita de pera Williams minimamente processada Starch-based edible coating on extending shelf life of fresh-cut pear

    OpenAIRE

    Diego Alvarenga Botrel; Nilda de Fátima Ferreira Soares; Geany Peruch Camilloto; Regiane Victória de Barros Fernandes

    2010-01-01

    A pera é uma das frutas de clima temperado mais consumidas no Brasil, no entanto sua conservação é limitada devido ao seu escurecimento quando sofre danos ou tratamentos físicos. Os revestimentos comestíveis interagem favoravelmente com o alimento, aumentando sua vida de prateleira. Este trabalho objetivou avaliar a ação de revestimento de amido adicionado de lactato de cálcio e L-cisteína na inibição do escurecimento enzimático, na redução do crescimento de psicrotrófilos e enterobactérias e...

  15. Efeito do jateamento de partículas na resistência de união e comportamento mecânico de cerâmicas à base de zircônia - revisão

    Directory of Open Access Journals (Sweden)

    J. C. Mosele

    2014-06-01

    Full Text Available As cerâmicas ácido-resistentes como a zircônia tetragonal parcialmente estabilizada com ítria (Y-TZP, podem ter melhorada sua resistência de união ao cimento resinoso por meio de abrasão por jateamento de partículas. Entretanto, não existe uma padronização dos parâmetros utilizados nesse jateamento, o que pode afetar negativamente o comportamento mecânico da Y-TZP. O objetivo deste estudo foi buscar, através de uma revisão da literatura, quais são os protocolos de jateamento utilizados e qual protocolo resulta em melhores valores de resistência de união ao cimento resinoso e menor degradação das propriedades mecânicas da Y-TZP. A estratégia de pesquisa envolveu uma busca de artigos na base de dados online Medline/Pubmed, de 2003 a 2013, utilizando as palavras chaves: zircônia, adesão, jateamento e resistência mecânica (zirconia, bond strength, sandblasting, and mechanical strength. Foram selecionados vinte e cinco artigos, que estavam de acordo com os critérios de inclusão. O tamanho de partícula mais utilizado foi de 50 µm para partículas de óxido de alumínio e de 110 µm para as partículas de óxido de alumínio modificadas por sílica. Segundo os estudos, o tamanho de partícula e o tempo de jateamento não influenciam os valores de resistência de união. Entretanto, o maior tamanho e o tipo de partícula (óxido de alumínio afetam negativamente a resistência mecânica da Y-TZP. Ainda existem controvérsias a respeito do efeito da pressão na resistência de união e na resistência mecânica da Y-TZP. O uso de pressões muito baixas pode afetar os valores de adesão. A distância entre a ponta jateadora e a superfície cerâmica e o tempo variou entre 7 a 30 mm e 5 a 90 s, respectivamente. Pôde-se concluir que alguns parâmetros do protocolo de jateamento ainda não estão bem definidos. Mesmo assim, os resultados dos estudos parecem corroborar a recomendação do uso de partículas pequenas e press

  16. Thermodynamic Optimization of DyCl3 -NaCl System

    Institute of Scientific and Technical Information of China (English)

    叶信宇; 孙益民; 张静; 谈君君

    2005-01-01

    In this paper, the phase diagram of the DyCl3 -NaCl system is optimized and calculated with CALPHAD ( calculation of phase diagram ) technology. A set of thermodynamic functions of compounds Na3 DyCl6, NaDyCl4, and NaDY2 Cl7 have been optimized and calculated based on an interactive computer-assisted analysis. The optimized thermodynamic parameters, calculated phase diagram and experimental phase diagram are thermodynamically serf-consistent.

  17. Performance of high-velocity oxyfuel-sprayed coatings on an fe-based superalloy in Na2SO4-60%V2O5 environment at 900 °C Part I: Characterization of the coatings

    Science.gov (United States)

    Sidhu, T. S.; Prakash, S.; Agrawal, R. D.

    2006-02-01

    This article demonstrates the successful formulation of NiCrBSi, Cr3C2-NiCr, Ni-20Cr, and Stellite-6 coatings on an Fe-based superalloy by a high-velocity oxyfuel (HVOF) process for hot corrosion applications. The microstructure, porosity, coating thickness, phase formation, and microhardness properties of the coatings have been characterized using the combined techniques of optical microscopy, x-ray diffraction, scanning electron microscopy/energy-dispersive x-ray analysis. A microhardness tester was used to determine the hardness of the coatings. The coatings in general exhibit characteristic splat-like, layered morphologies due to the deposition and resolidification of successive molten or semimolten powder particles. The NiCrBSi, Cr3C2-NiCr, and Ni-20Cr coatings have shown a nickel-base face-centered cubic (fcc) structure as a principal phase, whereas Stellite-6 coating has an fcc Co-rich metallic matrix. Oxides/spinel oxides are formed in small fraction as intersplat lamellae or globules oriented parallel to the substrate surface. Coatings possess some unmelted/partially melted particles, inclusions, and porosity less than 2%. The microhardness of the coatings is found to be higher than the superalloys. The Cr3C2-NiCr coating has indicated a maximum microhardness of 990 Hv, while a Ni-20Cr coating has shown a minimum value of about 600 Hv. This article is focused on the characterization of HVOF coatings. The hot corrosion behavior of these coatings in a molten salt (Na2SO4-60%V2O5) environment at 900 °C under cyclic conditions is being presented as part II included in this issue.

  18. Reclassification of Candida guilliermondii FTI 20037 as Candida tropicalis based on molecular phylogenetic analysis Reclassificação de Candida guilliermondii FTI 20037 como Candida tropicalis baseada na análise filogenética molecular

    Directory of Open Access Journals (Sweden)

    Luanne Helena Augusto Lima

    2003-11-01

    Full Text Available Yeasts of the genus Candida are of clinical importance and also have many industrial applications, mainly in the food industry. The yeast Candida guilliermondii FTI 20037 has been extensively studied in order to establish a biotechnological process for the production of xylitol. The goal of this study was to verify the taxonomic classification of this strain based on the analysis of rDNA sequences and the xyl1 gene. DNA fragments from these sequences were amplified by PCR and BLAST analysis revealed strong identity with the corresponding sequences from Candida tropicalis. Based on these results, we propose that C. guilliermondii FTI 20037 must be reclassified as C. tropicalis.As leveduras do gênero Candida possuem tanto importância clínica como diversas aplicações industriais, principalmente na indústria de alimentos. A levedura Candida guilliermondii FTI 20037 tem sido exaustivamente estudada pois pretende-se utilizá-la no estabelecimento de um processo biotecnológico para a produção de xilitol. O objetivo deste trabalho foi verificar a classificação taxonômica desta levedura por análise de sequências do rDNA e do gene xyl1. Fragmentos correspondentes a estas regiões foram amplificados por PCR e a análise destas sequências por BLAST revelou alta identidade com sequências correspondentes de Candida tropicalis. Estes resultados nos levam a propor que C. guilliermondii FTI 20037 deva ser reclassificada como C. tropicalis.

  19. Assessment of Impact of the Rheological Parameters Change on Sensitivity of the Asphalt Strain Based on the Test Results / Ocena Wpływu Zmiany Parametrów Reologicznych Na Wrażliwość Deformacji Mieszanek Mineralno - Asfaltowych Na Podstawie Wyników Badań

    Directory of Open Access Journals (Sweden)

    Kurpiel Artur

    2015-03-01

    Full Text Available Badanie pełzania pod obciążeniem statycznym jest obecnie najbardziej efektywnym badaniem pozwalającym na określenie reologicznych parametrów mieszanek mineralno - asfaltowych na podstawie krzywej pełzania. Stosowane obciążenia mają poziom nieniszczący i pozwalają na obserwację przebiegu odkształceń w czasie również po odciążeniu. Badanie może być realizowane przy ściskaniu, ścinaniu, rozciąganiu i zginaniu, a także w zakresie trójosiowym, w zależności od stosowanego aparatu realizującego zadany schemat naprężeń [1, 2, 3, 4, 5, 6].

  20. Modelo multidimensional para o controle da dengue: uma proposta com base na reprodução social e situações de riscos Multidimensional model for dengue control: a proposal based on social reproduction and risk situations

    Directory of Open Access Journals (Sweden)

    Solange Laurentino dos Santos

    2011-01-01

    Full Text Available O objetivo do artigo consiste em apresentar e discutir um modelo compreensivo/explicativo, de caráter ecossistêmico, sobre o processo de transmissão da dengue nos níveis de micro e macrocontexto, a partir da identificação das situações de riscos envolvidas. Considerou-se a dengue como doença infecciosa viral de transmissão vetorial que traz, na sua dinâmica de transmissão, elementos das dimensões biológicas, de conduta, ecológicas, políticas e econômicas, o que a caracteriza como um problema complexo e exige um enfoque sistêmico para seu controle. Assim, para a construção da modelagem, utilizaram-se o enfoque teórico da reprodução social de Juan Samaja e seus condicionantes de macro e microcontexto, e o enfoque operativo ecossistêmico, que buscou responder à pergunta condutora desta construção: quais são as situações de risco para transmissão da dengue, considerando as diversas dimensões da "reprodução social da saúde" no nível local? A visão ampliada das inter-relações entre as diversas situações de risco envolvidas na determinação multidimensional da dengue poderá servir como eixo direcionador para uma gestão integrada das ações do programa de controle da doença, articuladas entre os diversos setores envolvidos.This paper aims to present and discuss a comprehensive / explanatory model, of ecosystem approach, on the process of transmission of dengue in the levels of micro and macro context, from the identification of the risks involved. Dengue was considered a viral infectious disease of vectorial transmission that carries on its transmission dynamics, elements of the biological, behavioral, ecological, political and economic dimensions, that make it a complex problem and require a systemic approach to its control. Thus, for the construction of modeling, we used the theoretical framework of social reproduction of Juan Samaja and its conditions of macro and micro-context, and the operating

  1. PROMOCIJA ZDRAVJA NA DELOVNEM MESTU

    OpenAIRE

    Kondić, Vesna

    2015-01-01

    Varnost in zdravje pri delu sta ključna elementa pri zagotavljanju bolj zdravega in daljšega poklicnega življenja. Problem: Delo neposredno vpliva na zdravje, saj ljudje na delovnem mestu preživijo veliko časa, zato je zagotavljanje varnosti in zdravja delavcev pri delu zelo pomemben člen, ki ga mora delodajalec tudi zakonsko upoštevati. Namen: Namen magistrskega dela je proučiti učinkovitost promocije zdravja na delovnem mestu z vidika varovanja zdravja zaposlenih in ozaveščanja zap...

  2. The New Readout System of the NA62 LKr Calorimeter

    CERN Document Server

    Ceccucci, A; Farthouat, P; Lamanna, G; Rouet, J; Ryjov, V; Venditti, S

    2015-01-01

    The NA62 experiment [1] at CERN SPS (Super Proton Synchrotron) accelerator aims at studying Kaon decays with high precision. The high resolution Liquid Krypton (LKr) calorimeter, built for the NA48 [2] experiment, is a crucial part of the photon-veto system; to cope with the demanding NA62 re- quirements,itsback-endelectron icshadtobecompletelyrenewed. The new readout system is based on the Calorimeter REAdout Module (CREAM) [3], a 6U VME board whose design and pro- duction was sub-contracted to CAEN [4], with CERN NA62 group continuously supervising the de velopment and production phase. The first version of the board was delivered by the manufacturer in March 2013 and, as of June 2014, the full board production is ongoing. In addition to describing the CREAM board, all aspects of the new LKr readout system, including its integration within the NA62 TDAQ scheme, will be treated.

  3. Dendrite-Free Polygonal Sodium Deposition with Excellent Interfacial Stability in a NaAlCl₄-2SO₂ Inorganic Electrolyte.

    Science.gov (United States)

    Song, Juhye; Jeong, Goojin; Lee, Ah-Jung; Park, Jong Hwan; Kim, Hansu; Kim, Young-Jun

    2015-12-16

    Room-temperature Na-metal-based rechargeable batteries, including Na-O2 and Na-S systems, have attracted attention due to their high energy density and the abundance of sodium resources. Although these systems show considerable promise, concerns regarding the use of Na metal should be addressed for their success. Here, we report dendrite-free Na-metal electrode for a Na rechargeable battery, engineered by employing nonflammable and highly Na(+)-conductive NaAlCl4·2SO2 inorganic electrolyte, as a result, showing superior electrochemical performances to those in conventional organic electrolytes. We have achieved a hard-to-acquire combination of nondendritic Na electrodeposition and highly stable solid electrolyte interphase at the Na-metal electrode, enabled by inducing polygonal growth of Na deposit using a highly concentrated Na(+)-conducting inorganic electrolyte and also creating highly dense passivation film mainly composed of NaCl on the surface of Na-metal electrode. These results are highly encouraging in the development of room-temperature Na rechargeable battery and provide another strategy for highly reliable Na-metal-based rechargeable batteries. PMID:26598924

  4. AKUSTIČNA ANTENA NA OSNOVI OPTIČNEGA VLAKNA

    OpenAIRE

    Blatnik, Gregor

    2010-01-01

    Diplomska naloga opisuje princip delovanja vlakenskega optičnega senzorja vibracij z Michelsonovim interferometrom. Predstavljeno je teoretično ozadje delovanja senzorja, načrtovanje ter gradnja elektronskega vezja in izdelava akustične antene. Rezultati meritev so prikazani na računalniku s pomočjo programskega okolja LabVIEW.

  5. Na Cauda do Cometa

    Science.gov (United States)

    Voelzke, M. R.

    2009-01-01

    Quando viam um cometa, os antigos gregos imaginavam uma estrela com uma vasta cabeleira. Não à toa, a palavra deriva do termo koma, que significa cabelo. Constituídos por fragmentos de gelo e gases, os cometas possuem um núcleo sólido, que pode ter vários quilômetros de diâmetro, e uma cauda que sempre aponta na direção contrária ao Sol, devido aos ventos solares. Graças à aparência de pontos luminosos em movimento (ao contrário de outros astros, que parecem estáticos), esses corpos celestes foram interpretados por diferentes povos com muito misticismo, inspirando mitos tanto de boas-novas como de maus presságios. Conheça algumas dessas histórias:

  6. Lula na Veja

    OpenAIRE

    2011-01-01

    Resumo: As instituições da mídia detêm grande poder simbólico nas sociedades contemporâneas. São elas que selecionam quais fatos do cotidiano devem virar notícia, e como essas notícias serão representadas, de forma a potencialmente contribuir para manter ou transformar crenças e atitudes em diferentes áreas da vida. As representações produzidas pela mídia, no entanto, muitas vezes não são isentas de ideologia; sendo, na realidade, moldadas conforme os interesses das instituições que as veicul...

  7. NA48 prototype calorimeter

    CERN Multimedia

    1990-01-01

    This is a calorimeter, a detector which measures the energy of particles. When in use, it is filled with liquid krypton at -152°C. Electrons and photons passing through interact with the krypton, creating a shower of charged particles which are collected on the copper ribbons. The ribbons are aligned to an accuracy of a tenth of a millimetre. The folding at each end allows them to be kept absolutely flat. Each shower of particles also creates a signal in scintillating material embedded in the support disks. These flashes of light are transmitted to electronics by the optical fibres along the side of the detector. They give the time at which the interaction occurred. The photo shows the calorimeter at NA48, a CERN experiment which is trying to understand the lack of anti-matter in the Universe today.

  8. Akcelerace RSA na GPU

    OpenAIRE

    Balogh, Tomáš

    2013-01-01

    Tato bakalářská práce se zabývá implementací obecného algoritmu RSA prostřednictvím Montgomeryho násobení pro grafické karty. Pro vybranou platformu CUDA jsou vytvořeny čtyři verze implementace s cílem dosáhnutí co nejvyššího zrychlení výpočtu v porovnání s výpočtem na procesoru. Zrychlení výpočtu je kromě jiného dosaženo paralelizací aritmetických operací sčítání a násobení velkých čísel.

  9. Transepithelial Na+ transport and the intracellular fluids: a computer study.

    Science.gov (United States)

    Civan, M M; Bookman, R J

    1982-01-01

    Computer simulations of tight epithelia under three experimental conditions have been carried out, using the rheogenic nonlinear model of Lew, Ferreira and Moura (Proc. Roy. Soc. London. B 206:53-83, 1979) based largely on the formulation of Koefoed-Johnsen and Ussing (Acta Physiol. Scand. 42: 298-308. 1958). First, analysis of the transition between the short-circuited and open-circuited states has indicated that (i) apical Cl- permeability is a critical parameter requiring experimental definition in order to analyze cell volume regulation, and (ii) contrary to certain experimental reports, intracellular Na+ concentration (ccNa) is expected to be a strong function of transepithelial clamping voltage. Second, analysis of the effects of lowering serosal K+ concentration (csK) indicates that the basic model cannot simulate several well-documented observations; these defects can be overcome, at least qualitatively, by modifying the model to take account of the negative feedback interaction likely to exist between the apical Na+ permeability and ccNa. Third, analysis of the strongly supports the concept that osmotically induced permeability changes in the apical intercellular junctions play a physiological role in conserving the body's stores of NaCl. The analyses also demonstrate that the importance of Na+ entry across the basolateral membrane is strongly dependent upon transepithelial potential, cmNa and csK; under certain conditions, net Na+ entry could be appreciably greater across the basolateral than across the apical membrane. PMID:7057462

  10. Osteoporose na infância e na adolescência

    OpenAIRE

    Campos Lúcia M. A.; Liphaus Bernadete L.; Silva Clóvis A. A.; Pereira Rosa M. R.

    2003-01-01

    OBJETIVO: Revisar a literatura acerca da osteoporose na infância e adolescência, abordando diagnóstico, prevenção e tratamento de osteopenia e osteoporose. FONTE DOS DADOS: Foram utilizadas informações através de revisão bibliográfica, realizada por busca direta de artigos científicos e por pesquisa nas bases de dados Medline e Lilacs, no período de 1992 a 2002. SÍNTESE DOS DADOS: O artigo é estruturado em tópicos, nos quais procura-se definir e classificar a osteoporose na infância, enfatiza...

  11. Latest results from the NA57 experiment

    OpenAIRE

    Bruno, Giuseppe Eugenio

    2005-01-01

    The NA57 experiment at the CERN SPS has measured the production of strange and multi-strange particles in Pb-Pb (and p-Be) collisions at mid-rapidity. The collective dynamics of the collision is studied in the transverse and longitudinal directions as a function of centrality and beam momentum and analysed based on hydrodynamical models. Central-to-peripheral nuclear modification factors at 158 A GeV/c are presented and compared with other measurements and theory.

  12. Investigation on U - O - Na, Pu - O - Na and U,Pu - O - Na phase diagrams

    International Nuclear Information System (INIS)

    The thermochemical interaction between the nuclear fuel (uranium and plutonium mixed oxides) and the sodium has been investigated and particularly the three phase diagrams: U - O - Na; Pu - O - Na; U,Pu - O - Na. High temperature neutron diffraction, microcalorimetry and powder X-ray diffraction were used for the characterization of the compounds synthetized. This study allowed to complete the knowledge about each of these diagrams and to measure some physical and thermal properties on the compounds. The limits on the modelization of the fuel-sodium interaction are discussed from the results of the UO2 - Na reaction

  13. Reference evapotranspiration based on class A pan evaporation Evapotranspiração de referência com base na evaporação do tanque classe A

    OpenAIRE

    Marco Antônio Fonseca Conceição

    2002-01-01

    Estimating reference evapotranspiration (ETo) based on Class A pan evaporation (ECA) is very usual in irrigated areas. For this purpose the ECA values are multiplied by a pan coefficient (Kp) to obtain ETo. Kp values can be estimated in different ways being, however, important to know which method would estimate the best value for a given locality. In the present work estimated values of ETo based on Class A pan evaporation, using Kp values determined by different methods, were compared to Pe...

  14. Recovery of the heavy elements by NaY AND NaZSM-5 sorbant materials

    International Nuclear Information System (INIS)

    Porous sorbants as zeolites have a several applications in differents fiels: industrial gas purification, catalysis, transformation hydrocarbures prosesses and exchange ions. The hiogh capacity to exchange their cations with those of aqueous solutions was known (1). Since the accession of synthetic zeolites, these silicates have invaded the market and the firstindustrial applications were in exchange field. Studies at Battelle Northwest in Rchland, Washington have shown that zeolites may be used in treatment of radioactive wastes (2). The used method for storing the isotopes is based on selective removal by ion exchange. Clinoptilolite, zeolite (modernite), NaA, and AW-500 have been used. In this context, the present work deals with the recovery of heavy metals like lead and uranium using some microporous materials. The obtained results show that NaY faujasite and NaZSM-5 of the FAU- and MFI-type structure respectively are very effective in removing these elements from waste water

  15. Energy levels of 24Na

    International Nuclear Information System (INIS)

    Four experiments are reported yielding excitation energies, spins, parities, mean lifetimes, γ-ray branching ratios of 24Na. The applied methods include particle-γ angular correlations and Doppler shift attenuation method lifetime measurements. From a 23Na(d,pγ)24Na experiments using a large Ge(Li) γ-detector excitation energies, branching ratios and mean lifetimes are determined. A 26Mg(d,αγ)24Na experiment using a NaI(Te) γ-detector enables the assignment of spins and γ-ray mixing ratios. From a 22Ne(3He,pγ)24Na measurement with a deeply implanted 22Ne target, preliminary data from the γ-decay of levels with Ex = 4 - 6 meV and additional nuclear lifetime data are decided. Finally a 23Na(n,γ)24Na γ-spectrum obtained with thermal neutrons and a Ge(Li) detector enabled the adjustment of some of the level energies. The data from these and other experiments were collected and compared with theory. It turned out that the statistical model of nuclear reactions does not give reliable information about nuclear spin-parity combinations. However recent shell-model calculations of Chung give remarkable agreement for low-lying levels (Ex < 3.3 meV)

  16. Proposta de Implementação do Custeio Baseado em Atividades na Gestão de Serviços Odontológicos = Implementation proposal of activity-based costing in the management of dental services

    Directory of Open Access Journals (Sweden)

    Karyn de Castro Serratine

    2013-03-01

    Full Text Available O artigo tem por objetivo estruturar uma proposta de implementação do custeio baseado em atividades na gestão de serviços odontológicos. Foi realizada uma pesquisa descritiva, por meio de um estudo de caso, com abordagem predominantemente qualitativa. O estudo inicia com uma incursão teórica nos fundamentos que sustentam o estudo empírico, abordando a importância da gestão estratégica de custos, o custeio baseado em atividades – ABC e a utilização do ABC em empresas de saúde. Após, são apresentados os procedimentos metodológicos adotados. Na sequência, discute-se a proposta realizada. A proposta de implementação do ABC contempla quatro macroetapas: identificação das atividades; atribuição dos custos às atividades; identificação dos objetos de custos; e atribuição dos custos das atividades aos objetos de custos. Foram selecionados seis procedimentos odontológicos prestados: avaliação, profilaxia, restauração, endodontia, exodontia e coroa protética porcelana. A escolha justifica-se por se tratar dos procedimentos mais representativos em termos de ocorrência e de faturamento. Além da proposta de implementação do ABC, fez-se a análise dos custos diretos de cada objeto de custo. Os custos diretos identificados referem-se aos materiais utilizados e ao processo de esterilização realizado. The goal of this article is to structure an implementation proposal of activity-based costing in the management of dental services. A descriptive research was carried out through a case study with a predominantly qualitative approach. The study begins with a foray into the theoretical foundations that support the empirical study addressing the importance of strategic cost management, activity-based costing - ABC and the use of ABC in healthcare companies. Then, methodological procedures are presented and the proposal made is discussed. The implementation proposal of ABC comprises four macro-steps: identification of

  17. Imagens urbanas: diretrizes de planejamento e desenho urbano baseadas na leitura popular de espaços públicos Urban images: guidelines to urban planning and design based in the popular reading of public spaces

    Directory of Open Access Journals (Sweden)

    mail: elsonmp@hotmail.com

    2010-04-01

    Full Text Available O presente artigo surgiu a partir do questionamento de como seria possível compreender e aplicar o imaginário coletivo no processo de planejamento e desenho urbanos. O objetivo principal, então, é o de demonstrar como se deu a aplicação prática do cruzamento de métodos de leitura de imagens mentais, numa tentativa de instrumentalizar a leitura popular. Por meio de pesquisa com o público usuário do Largo da Ordem, em Curitiba, PR, nos anos de 2004 e 2005, e com base em pesquisa documental, entrevistas e desenhos feitos pela comunidade, os autores obtiveram material necessário para aplicar o método de mapas cognitivos e criar arborescências, das quais puderam ser extraídas diretrizes para um planejamento e desenho urbanos mais próximos à realidade dos usuários da cidade, tentando ratificar a leitura comunitária preconizada por um planejamento urbano participativo. A partir de pesquisa qualitativa, puderam ser delineadas diretrizes de re-dinamização sócio-espacial para tal recorte, com respaldo tanto na bibliografia estudada quanto no material obtido com a comunidade, ratificando que, ao instrumentalizar a comunidade, é possível abrir um caminho para o diálogo entre o técnico e o cidadão (que também inclui os técnicos, pois esses habitam a cidade.

  18. Composition- and temperature-driven phase transition characteristics and associated electromechanical properties in Bi0.5Na0.5TiO3-based lead-free ceramics.

    Science.gov (United States)

    Bai, Wangfeng; Chen, Daqin; Zheng, Peng; Shen, Bo; Zhai, Jiwei; Ji, Zhenguo

    2016-05-17

    In this study, a lead-free ceramic system comprising (0.94 - x)Bi0.5Na0.5TiO3-0.06BaTiO3-xBi(Zn0.5Ti0.5)O3 (BNT-BT-BZT) was designed and prepared by a conventional solid-state reaction method. The effect of the addition of BZT on the phase transition characteristics and associated electromechanical properties of BNT-BT was systematically discussed and a schematic phase diagram was established. The addition of BZT had a strong impact on the phase transition as well as the strain and piezoelectric activity. The phase coexistence, which involves ferroelectric rhombohedral-relaxor pseudocubic phases, can be driven by modification with BZT and increases in temperature and can be confirmed by XRD measurements, analysis of Raman spectra and temperature-dependent changes in polarization and strain hysteresis loops. Accompanied by a shift in the ferroelectric-to-relaxor temperature TF-R to below room temperature on the addition of BZT, a compositionally induced ferroelectric-to-relaxor phase transition occurred, which gave rise to a large strain of 0.33% with a normalized strain Smax/Emax of 550 pm V(-1) at the critical BZT content x of 0.0275. The results were closely correlated with the composition and dependence on temperature of the phase transition, which significantly influenced the electromechanical properties, and the origin of the large strain observed in the present system was also addressed in detail. As a result, the design principles provided in this study open the possibility of obtaining BNT-based lead-free ceramics with enhanced electromechanical properties for actuator applications. PMID:27125262

  19. Effects of SrTiO3 on dielectric and piezoelectric properties of K0.48Na0.48Li0.04Nb0.96Ta0.04O3-based piezoceramics

    International Nuclear Information System (INIS)

    Highlights: ► Sodium potassium niobate based piezoceramics modified with SrTiO3 (ST) were prepared. ► Crystal structure, microstructure and dielectric properties of ceramics were investigated. ► Addition of ST more than 3 mol% changed ferroelectric behavior from normal to relaxor. ► Coexistence of two structures in ceramic with 1 mol% ST enhanced piezoelectric constant. - Abstract: In this study, (100 − x) K0.48Na0.48Li0.04Nb0.96Ta0.04O3 − xSrTiO3 (0 ≤ x ≤ 10) ceramics were fabricated via normal sintering of synthesized powder by using solid state reaction. All ceramics revealed pure perovskite structure, indicating formation of solid solution between KNNLT and ST up to 10%. With increasing x, the crystal structure of ceramics changed from orthorhombic to tetragonal and finally pseudocubic symmetry when x = 10. Ceramic containing 1% ST had orthorhombic and tetragonal symmetries, simultaneously. Investigation of the variation of dielectric constant of ceramics versus temperature revealed that for ceramic with x = 1, polymorphic phase transition (PPT) temperature between orthorhombic and tetragonal is less than room temperature. Thus coexistence of two different structures in this ceramic is due to vicinity of its composition to morphotropic phase boundary (MPB). As a result, the maximum piezoelectric constant was measured for this ceramic. Ceramics containing 5 and 7.5% ST tend to appear relaxor ferroelectric behavior which is because of chemical inhomogeneities in both A- and B-sites of the ABO3 perovskite structure.

  20. Muscle-based perception: theory, research and implications for rehabilitation Percepção baseada nos músculos: teoria, pesquisa e implicações na reabilitação

    Directory of Open Access Journals (Sweden)

    C Carello

    2008-10-01

    Full Text Available BACKGROUND: Muscle-based perception of the spatial properties of limbs constrains the patterning, timing and magnitude of muscle forces while performing motor activities. The centrality of muscle-based perception to both ordinary and skilled actions warrants attention from the rehabilitation community, since deficits in its functioning would be related to important functional limitations. In this overview, we summarize a body of research that may be used to guide the development of effective assessment tools and rehabilitation programs that are specifically directed towards such deficits. OBJECTIVES: There were four specific aims: first, to present an information-based approach to muscle-based perception that is grounded in physical laws; second to identify central principles underlying muscle-based perception that have been revealed and supported by empirical work; third, to summarize reports that have investigated whether the principles identified can be generalized to muscle-based perception in individuals with sensory-motor impairments; and fourth to provide a preliminary discussion of the potential implications of the research presented here for issues relating to rehabilitation.INTRODUÇÃO: A percepção muscular das propriedades espaciais dos membros restringe o padrão, período e magnitude das forças exercidas durante a execução de atividades motoras. A importância central da percepção muscular, tanto para ações rotineiras quanto para ações especializadas, merece atenção da comunidade envolvida na área de reabilitação, uma vez que alterações em suas funções podem estar relacionadas a importantes limitações funcionais. Nesta revisão, os autores apresentam um resumo da pesquisa que pode ser utilizada para guiar o desenvolvimento de ferramentas de avaliação eficazes bem como programas de reabilitação que sejam especificamente direcionados para estas disfunções. OBJETIVOS: Quatro pontos específicos foram inclu

  1. Fluorine-18 NaF PET imaging of child abuse

    Energy Technology Data Exchange (ETDEWEB)

    Drubach, Laura A. [Children' s Hospital Boston and Harvard Medical School, Department of Radiology, Division of Nuclear Medicine/PET, Boston, MA (United States); Sapp, Mark.V. [School of Osteopathic Medicine, Child Abuse Research Education and Services (CARES) Institute University of Medicine and Dentistry of New Jersey, New Jersey (United States); Laffin, Stephen [Children' s Hospital Boston, Department of Radiology, Division of Nuclear Medicine/PET, Boston, MA (United States); Kleinman, Paul K. [Children' s Hospital Boston and Harvard Medical School, Department of Radiology, Division of Musculoskeletal Imaging, Boston, MA (United States)

    2008-07-15

    We describe the use of {sup 18}F-NaF positron emission tomography (PET) whole-body imaging for the evaluation of skeletal trauma in a case of suspected child abuse. To our knowledge, 18F NaF PET has not been used in the past for the evaluation of child abuse. In our patient, this technique detected all sites of trauma shown by initial and follow-up skeletal surveys, including bilateral metaphyseal fractures of the proximal humeri. Fluorine-18 NaF PET has potential advantage over Tc-99m-labeled methylene diphosphonate (MDP) based upon superior image contrast and spatial resolution. (orig.)

  2. A new VME trigger processor for the NA57 experiment

    CERN Document Server

    Antinori, Federico; Bloodworth, Ian J; Evans, D; Feofilov, G A; Jones, G T; Jovanovic, P; Kinson, J B; Kirk, A; Kocper, B; Kolojvari, A A; Králik, I; Lenti, V; Lupták, M; Norman, P I; Piuz, François; Staroba, P; Stokes, W N; Suchdolinská, I; Tomasicchio, G; Thompson, M; Van de Vyvre, P; Vascotto, Alessandro; Villalobos Baillie, O; Votruba, M F; Závada, P

    1997-01-01

    The ALICE experiment will use a trigger concept requiring independent deadtimes for each sub-detector system, and with detector-specific past-future protection. These features are implemented in a new VME-based trigger processor for the NA57 experiment. Monitoring and diagnostic features of the new trigger processor are also described.List of Figures Figure 1:ALICE trigger logic diagram. Figure 2:Layout of the NA57 experiment. Figure 3:Schematic layout of NA57 VME central trigger processor. Figure 4:Example of a trigger definition script.

  3. Fluorine-18 NaF PET imaging of child abuse

    International Nuclear Information System (INIS)

    We describe the use of 18F-NaF positron emission tomography (PET) whole-body imaging for the evaluation of skeletal trauma in a case of suspected child abuse. To our knowledge, 18F NaF PET has not been used in the past for the evaluation of child abuse. In our patient, this technique detected all sites of trauma shown by initial and follow-up skeletal surveys, including bilateral metaphyseal fractures of the proximal humeri. Fluorine-18 NaF PET has potential advantage over Tc-99m-labeled methylene diphosphonate (MDP) based upon superior image contrast and spatial resolution. (orig.)

  4. Valores na escola

    Directory of Open Access Journals (Sweden)

    Menin Maria Suzana De Stefano

    2002-01-01

    Full Text Available Neste texto pretende-se discorrer sobre valores morais na escola e suas implicações para a formação de professores. Para tanto discutir-se-á, em primeiro lugar, e brevemente, o que são valores morais, ou éticos, e como a escola pode situar-se em relação a eles. Em seguida, serão relatadas algumas observações a respeito de valores de professores e práticas daí decorrentes. São comentados resultados de pesquisa que ilustram a transmissão de valores de forma doutrinal e a educação moral e cívica tal como realizada na ditadura militar, e, por outro lado, a posição relativista e/ou de laissez-faire que certas escolas podem adotar, metodologicamente, sobre a educação em valores. Finalmente, defender-se-á a idéia de que é necessária uma discussão sobre valores pelos diversos membros da escola e uma opção por uma metodologia para ensiná-los, seja os professores, em sua formação inicial e continuada, seja os alunos. A teoria de desenvolvimento moral de Jean Piaget será apresentada como uma referência possível para a educação em valores. Exemplos de situações escolares de conflito de valores entre direção, pais e alunos são discutidas para ilustrar como uma escola pode adotar um procedimento democrático de educação em valores, que se apresenta como um terceiro caminho possível de educação moral nas escolas, além das posições doutrinárias ou relativistas.

  5. Efeito do colesterol na atividade da (Na+/K+) ATPase

    OpenAIRE

    Oliveira, Liliana Patrícia Alves

    2012-01-01

    O alumínio é o metal mais abundante na crosta terrestre sendo a sua exposição cada vez maior nas sociedades industrializadas. Numa sociedade cada vez mais envelhecida onde o número de casos de doenças neurodegenerativas tendem a aumentar, parece importante esclarecer os mecanismos celulares da neurotoxicidade do alumínio de forma a prevenir os seus efeitos. Estudos in vivo e in vitro indicam que a exposição a alumínio inibe a atividade da (Na+/K+)ATPase, proteína responsável...

  6. Anotaciones Geoquímicas para Exploración de Esmeraldas en la Región Muzo-Coscuez con Base en la Relación Na/K y Elementos Traza Anotaciones Geoquímicas para Exploración de Esmeraldas en la Región Muzo-Coscuez con Base en la Relación Na/K y Elementos Traza

    Directory of Open Access Journals (Sweden)

    Mendoza Parada Jaime E.

    1996-12-01

    Full Text Available This study covers the northwestern area of the emerald belt in the Muzo-Coscuez District located in the western edge of the Eastern Cordillera of Colombia, Departamento de Boyacá. The study area includes sediments of Lower Cretaceous age, affected by fault systems and fractures which were accompanied by mineralizing events produced from fluid migration reacting with cromophores of the including rock, providing the esmeralds origin.  The emerald mineralization is stratigraphically restricted to the shaly level of the carbonaceouscalcareous facies locked toward the top of Calcareous Shale member and base of the Carbonaceous Shale unit of Paja Formation. This shaly unit is mineralogically associated whith rhombohedral calcite, pyrite, albite and pyrophyllite, which are minerals formed at low temperature conditions, as a result of post-magmatic hydrothermal-neumatholithic processes and fluids provided by the including rock. Geochemically it is established that the albitization processes favor the emerald formation, meanwhile the potassic metasomatism related to regional metamorphism and dynamic tectonism inhibit the emerald mineralization as high temperatures are generated. The best indicators at local and regional considerations to conduct the geochemical exploration for emeralds are the behavior of chemical elements present in the water, active sediments, soil and rocks where the anomalous concentration of Na/K are higher than 1.The high anomalous concentrations of sodium and some elements in rare earths constitute also excellent indicators to conduit geochemical exploration.Este estudio comprende el área noroccidental del cinturón esmeraldífero en la región Muzo-Coscuez, estribaciones occidentales de la Cordillera Oriental de Colombia en el Departamento de Boyacá, conformado por sedimentitas de edad Cretáceo Inferior, afectadas estructuralmente por sistemas de fallas, fracturas acompañadas de eventos mineralizantes por migración de

  7. A aposta na filosofia

    Directory of Open Access Journals (Sweden)

    Márcio Suzuki

    2011-12-01

    Full Text Available Para Hume, filosofar é uma atividade semelhante às demais ocupações humanas. A decisão que leva à atividade filosófica é menos resultado de uma argumentação teórica do que fruto de um cálculo prático, que é entendido como uma caça ou um jogo. O objetivo deste trabalho será o de mostrar que no jogo filosófico perde quem joga sério demais. A aposta na filosofia tem que passar pelo bom humor e pela diversão: uma resposta a Pascal?For Hume, philosophy is in itself neither more nor less important than other human activities. On the contrary, it can be explained from its resemblance with game and hunting. If one chooses to dedicate himself to philosophy, his decision is not the consequence of logical reasoning, but depends on practical evaluation, which has something to do with gambling. The following text tries to show that in philosophy, like in other games, the loser will be the one who plays too earnestly. The philosophical game requires good humour and some relaxation: Is this a good answer to Pascal's pari?

  8. O SUBLIME NA MODERNIDADE

    Directory of Open Access Journals (Sweden)

    Martha de Almeida

    2009-03-01

    Full Text Available A obra Uma investigação filosófica sobre a origem de nossas idéias do sublime e dobelo, do sensualista inglês Edmund Burke (1757, data as origens do sublime na Modernidade. Nosublime ocorre é um prazer ligado à dor, um "horror delicioso" que sentimos quando acreditamosque estamos em perigo sem que isso esteja ocorrendo realmente. Em O mundo como Vontade erepresentação Schopenhauer assume as influências que sofreu de Kant no que diz respeito à suainterpretação sobre o belo e o sublime, porém difere dele quanto à natureza dessa impressão. ParaSchopenhauer a experiência estética pressupõe a dissolução da subjetividade num movimento decontemplação das idéias livre do querer imposto pela vontade individual. As idéias deSchopenhauer influenciaram a estética do Nietzsche de O nascimento da tragédia.

  9. Influence of Y, Gd and Sm on the glass forming ability and thermal crystallization of aluminum based alloy; Efeito das terras raras Y, Gd e Sm na tendencia a formacao de amorfo e na cristalizacao termica em ligas a base de aluminio

    Energy Technology Data Exchange (ETDEWEB)

    Aliaga, L.C.R.; Bolfarini, C.; Kiminami, C.S.; Botta Filho, W.J., E-mail: aliaga@ufscar.b [Universidade Federal de Sao Carlos (DEMa/UFSCar), SP (Brazil). Dept. de Engenharia de Materiais; Danez, G.P. [Universidade Federal de Sao Carlos (PPG-CEMUFSCar), SP (Brazil). Programa de Pos-Graduacao em Ciencia e Engenharia de Materiais

    2010-07-01

    Al-based amorphous alloys represent an important family of metals and a great scientific activity has been devoted to determine the main features of both glass forming ability (GFA) and crystallization behavior in order to have a comprehensive framework aimed at potential technological applications. Nowadays, it is well known that the best Al-based amorphous alloys are formed in ternary systems such as Al- RE-TM, where RE is a rare earth and TM a transition metal. This paper presents results of research in Al{sub 85}Ni{sub 10}RE{sub 5} alloys (RE = Y, Gd and Sm). Amorphous ribbons were processed by melt-spinning under the same conditions and subsequently characterized by x-ray diffraction (XRD) and differential scanning calorimetry (DSC). Results show appreciable micro structural differences as function of the rare earth, thus crystal is obtained for Y, nano-glassy for Gd and, fully amorphous structure for Sm. (author)

  10. Ortodontia baseada em evidência científica: incorporando ciência na prática clínica Scientific evidence-based orthodontics: incorporating science within clinic practice

    Directory of Open Access Journals (Sweden)

    Maria Tereza Scardua Mariano

    2009-06-01

    Full Text Available O objetivo deste artigo é despertar o ortodontista e conscientizá-lo sobre a importância da tomada de decisão baseada em evidência científica no cuidado aos pacientes. Serão descritos os passos essenciais para a prática da Odontologia baseada em evidência (OBE, assim como os princípios da ciência e da pesquisa. Existem caminhos adequados para a busca da informação de qualidade, sendo esses a única garantia de encontrar artigos válidos. Na seleção de artigos científicos, o primeiro passo é definir o seu desenho, pois para cada dúvida clínica há um delineamento adequado capaz de respondê-la. Dessa maneira, questões sobre tratamento, etiologia, diagnóstico, prognóstico ou prevenção só podem ser respondidas por um artigo que tenha sido delineado para tal. O conhecimento da alocação randomizada, do mascaramento e do grupo-controle é fundamental para que possamos realizar uma leitura crítica dos artigos científicos, reconhecendo os que merecem credibilidade. Em meio a tantas publicações, precisamos definir, com segurança, o que deve ser incorporado ao nosso conhecimento e o que deve ser incorporado à prática clínica, mudando a nossa conduta. Desse modo, poderemos oferecer aos nossos pacientes opções terapêuticas mais consistentes e previsíveis.The aim of this article is to warn the orthodontist about the importance of making decision based on scientific evidence when taking care of the patients. It describes the main steps for the Dentistry practices based in evidence (EBD as well as the science and research principles. There are adequate ways for the search of quality information. While selecting the scientific articles, the first step would be defining its design, since for each question there is an adequate delineation able to answer it. Questions about treatment, etiology, diagnostic, prognostic or prevention could be answered in the article if it has been delineated for that. Understanding the meaning

  11. Currículo por competências na área de biodiagnóstico: desafios de implantação Skill-based curriculum in biological diagnosis: implementation challenges

    Directory of Open Access Journals (Sweden)

    Maria Beatriz S. C. de Oliveira

    2006-03-01

    Full Text Available O presente trabalho objetivou investigar a adoção da noção de competências na organização curricular do Curso Técnico de Laboratório em Biodiagnóstico em Saúde, da Escola Politécnica de Saúde Joaquim Venâncio (EPSJV, unidade técnico-científica da Fundação Oswaldo Cruz (Fiocruz. A pesquisa enfocou a viabilidade da ressignificação desse modelo a partir da adoção da matriz crítico-emancipatória proposta por Deluiz, Ramos e Kuenzer. A pesquisa, de natureza qualitativa, foi realizada por meio de entrevistas com professores da instituição. Os resultados apontaram que a adoção do modelo de competências não se deu por opção pedagógica, mas por imposição legal das instâncias normativas. A identificação, definição e construção de competências que orientaram a organização curricular foram efetuadas através da perspectiva totalizante, ao buscar contemplar as diversas dimensões do conhecimento. A operacionalização desse modelo e o desenvolvimento da dimensão subjetiva das competências mostraram-se o maior desafio enfrentado pelos docentes³.This article investigates the incorporation of the notion of 'skills' in the development of the Vocational Course on Laboratory in Biological Diagnosis in Health of the Joaquim Venâncio Polytechnic Health School (EPSJV, a technical and scientific unit of the Oswaldo Cruz Foundation (Fiocruz. The conducted research focused on determining validity and viability of understanding the skill-based curriculum in the light of the critical/emancipatory approach proposed by Deluiz, Ramos and Kuenzer. The qualitative research was comprised of interviews with teachers of the institution. Results show that the implementation of skill-based ideas was the result of legal determination, not an agreed pedagogical approach. Besides that, the identification, selection and development of skills guiding the development of the curriculum were performed with a totalizing perspective in mind

  12. Dr. Sackett & "Mr. Sacketeer"... Encanto e desencanto no reino da expertise na medicina baseada em evidências Dr. Sackett & "Mr. Sacketeer"... enchantment and disenchantment in the land expertise in evidence-based medicine

    Directory of Open Access Journals (Sweden)

    Luis David Castiel

    2001-02-01

    Full Text Available Em maio de 2000, o Prof. David L. Sackett, um dos criadores do movimento da medicina baseada em evidências (MBE, publicou no British Medical Journal um texto no qual renunciava a escrever, ministrar cursos e atuar como referee em temas relacionados a MBE. Esta atitude é justificada por sua frustração com o que considerou efeitos danosos de um alegado excesso de experts no referido campo. Esta foi a matéria prima para abordar aspectos ligados à definição e escopo das propostas da MBE assim como correspondentes críticas, enfatizando as estratégias retóricas empregadas por tal movimento. A seguir, foi discutida a noção de expertise e apresentados breves enfoques sobre o papel dos sistemas expert e da competência especializada na nossa ambiência societal, elaborados respectivamente por Anthony Giddens e Zygmunt Bauman. A intenção central deste comentário é enfatizar que ao acompanhar o progressivo movimento nas tentativas de obter controle e inteligibilidade a nossos objetos de estudo, é preciso levar em conta a possibilidade de haver dimensões inalcançáveis através do modo de pensar racionalista próprio do ocidente.In May 2000, Prof. David L. Sackett, one of the founders of the evidence-based medicine movement (EBM, published an article in the British Medical Journal in which he renounced writing, teaching, or serving as a referee for topics related to EBM. He justified his stance based on his frustration over what he considered the harmful effects of an alleged excess of experts in this field. Sackett's position was the raw material whereby we approached aspects linked to the definition and scope of EBM as well as related critiques. We also stress the movement's various rhetorical strategies. In addition, we discuss both the notion of expertise and the role of "expert systems" and "specialized competence" in our societal milieu, developed respectively by Anthony Giddens and Zygmunt Bauman. The main focus of this commentary

  13. Estimativas das componentes da radiação solar incidente em superfícies inclinadas baseadas na radiação global horizontal Estimates of solar radiation components on a tilted surface based on global horizontal radiation

    Directory of Open Access Journals (Sweden)

    Adilson P. Souza

    2011-03-01

    Full Text Available Foram avaliadas equações estatísticas de estimativas com agrupamentos de dados anuais e mensais e suas respectivas validações, para as componentes global, direta e difusa da radiação solar incidente em superfícies inclinadas a 12,85, 22,85 e 32,85º, com face para o Norte, nas condições climáticas e geográficas de Botucatu, SP. Empregou-se as frações das três componentes da radiação a do topo da atmosfera em correlação com o coeficiente de transmissividade atmosférica do plano horizontal, em uma base de dados de abril/1998 a dezembro/2007, cujas medidas nas três inclinações ocorreram em diferentes períodos, todavia concomitantes ao plano horizontal. O aumento do ângulo de inclinação da superfície propiciou aumento do espalhamento dos valores diários do índice de claridade para superfícies inclinada e horizontal. Nos agrupamentos anuais os piores desempenhos foram verificados na estimativa da radiação difusa diária para superfície inclinada, com valores máximos de espalhamentos iguais a 3,89 MJ m-2 d-1 (43,65% e ajustamento em torno de 62%. Na estimativa das componentes global e direta da radiação solar nos planos inclinados, podem ser aplicadas, tanto as equações anuais como as mensais, com desempenhos dependentes das condições climáticas.Statistics equations and validations with groups of annual and monthly data were evaluated for global, direct and diffuse solar radiation components incident on the tilted surface to 12.85, 22.85 and 32.85° with the face North, in climate and geographical conditions of Botucatu, SP. It was employed the fractions of three components of extraterrestrial radiation in correlation with the coefficient clearness index horizontal plane, in a database of April/1998 to December/2007, whose measures at different periods in three inclinations, however concomitant to the horizontal plane. Increasing the angle of the surface led to increased scattering of the daily values of

  14. Biosolids effectiveness to yield ryegrass based on their nitrogen content Eficiência de biossólidos na produção de azevém baseado no conteúdo de nitrogênio

    Directory of Open Access Journals (Sweden)

    Rodrigo Studart Corrêa

    2005-06-01

    Full Text Available Biosolids have been reported to increase yields and supply plant nutrients. However, complying with health and environmental standards is necessary before applying biosolids to land. Thus, sludge stabilization is required to make biosolids safe enough for their agricultural use. Side effects of stabilization processes on agronomic features of sewage sludge are not quite known, although their understanding is essential for biosolids management. Based on a model equivalent to the Mitscherlich equation, effects of the most common processes for sludge stabilization were evaluated (composting, liming, heat-drying and solar irradiation in relation to the agronomic effectiveness of biosolids to yield Lolium perenne L. on two tropical soils, with NH4H2PO4 as a reference. Sewage stabilization processes have affected the ability of biosolids to promote plant growth. Their effectiveness was usually higher than fertilizer in a Spodosol and lower in an Oxisol. Solar-irradiated sludge presented the highest effectiveness among the biosolids and reached peak yields at the lowest application rate independent on soil type. Biosolids could efficiently substitute fertilizers and even yield more plant dry matter than the NH4H2PO4 reference, depending on the biosolid and soil type.Biossólidos têm sido citados como capazes de aumentar a produção de culturas e suprir nutrientes para plantas. Questões sanitárias e ambientais demandam que eles sejam estabilizados para que sejam usados na agricultura. Os efeitos dos processos de estabilização sobre as propriedades agronômicas de biossólidos não são completamente conhecidos, apesar de essenciais para o seu manejo. Baseado em um modelo equivalente à equação de Mitscherlich, este trabalho avaliou os efeitos dos processos mais comuns para a estabilização de lodos de esgotos (compostagem, caleação, secagem térmica e irradiação solar sobre a eficiência agronômica de biossólidos na produção de Lolium

  15. Performance of adhesives base on PU, Epoxy and silane in the Kevlar/alumina interface; Desempenho de adesivos a base de PU, epoxi e silano na interface Kevlar/alumina

    Energy Technology Data Exchange (ETDEWEB)

    Noronha, K.F.; Melo, F.C.L.; Lopes, C.M.A. [Divisao de Materiais, Instituto de Aeronautica e Espaco (IAE), Sao Jose dos Campos, SP (Brazil); Divisao de Engenharia Mecanica-Aeronautica, Instituto Tecnologico de Aeronautica (ITA), Sao Jose dos Campos, SP (Brazil)], e-mail: cmoniz@iae.cta.br

    2010-07-01

    Hybrid ceramic/polymer composites are used for ballistic protection due to the good high-velocity impact absorption properties. The choice of the proper adhesive used to bond ceramic and polymer layers is one of the major issues for hybrid armor development due to its influence in the ballistic resistance behaviour. This work presents an adhesion study in composites of aramid textile (Kevlar) and alumina. Adhesives of different chemical nature, based on polyurethane, epoxy and silane were evaluated. T-Peel test was performed for the interface characterization and the post- failure surfaces were examined by optical microscopy. In all samples the failure occurred at the interface. The silane-based adhesive showed no interaction with the polymer, while the PU hot melt adhesive presented the highest adhesion strengths. (author)

  16. Estudo comparativo da resistência adesiva da interface resina/braquete, sob esforços de cisalhamento, empregando três resinas compostas e três tipos de tratamento na base do braquete Comparative study of the shear bond strength of the resin/bracket interface, using three different resin composites and three different treatments in the base of the bracket

    Directory of Open Access Journals (Sweden)

    Adriano Lia Mondelli

    2007-06-01

    Full Text Available OBJETIVO: considerando que, até o momento, a união braquete/resina é conseguida mecânica e quimicamente, esse estudo propôs avaliar: 1 a eficiência da metodologia empregada para avaliação da força de união da interface resina/braquete; 2 a resistência adesiva da interface resina/braquete sob esforços de cisalhamento, empregando três marcas comerciais de resina composta (Concise ortodôntico, Transbond-XT e Filtek-Z-250; 3 o efeito, nesta resistência adesiva, do jateamento com óxido de alumínio, aplicado na base do braquete metálico, associado ou não ao sistema adesivo resinoso dentário. METODOLOGIA: para avaliar a união adesiva, especificamente na interface resina/braquete, empregou-se uma máquina universal de ensaios e o teste preconizado foi o de cisalhamento. RESULTADOS E CONCLUSÕES: após análise estatística (análise de Variância e, posteriormente, teste de Tukey e discussão dos resultados, conclui-se que: a ocorrência de 12,5% de fraturas coesivas pode ser considerada mínima, indicando que a metodologia empregada pode ser considerada confiável para avaliar especificamente a força de união da interface resina/braquete; em relação aos tipos de materiais empregados, sem nenhum tratamento prévio, as resinas compostas Concise ortodôntico, Transbond-XT e Filtek-Z-250 apresentaram valores similares de resistência adesiva sob esforços de cisalhamento; os tratamentos que incluíam a aplicação do adesivo específico, com ou sem jateamento com óxido de alumínio na base do braquete, foram mais efetivos para a resina composta Concise ortodôntico, quando comparados ao seu grupo controle; os tratamentos de jateamento com óxido de alumínio, associado ou não ao adesivo específico na base do braquete, foram mais efetivos estatisticamente para a resina composta Transbond-XT, quando comparados ao seu grupo controle; para a resina composta Filtek-Z-250, quando utilizado o adesivo Single Bond na base do braquete

  17. O Personal Trainer na Perspectiva do Marketing

    Directory of Open Access Journals (Sweden)

    Cibele Biehl Bossle

    2011-03-01

    Full Text Available Esse estudo apresenta mapeamento das referências dedicadas à formação do personal trainer em bases de dados eletrônicas. Essa garimpagem revelou baixa produção científica sobre o assunto e mostrou que na literatura sobre personal trainer predominam livros com linguagem corrente no mundo dos negócios. Esses achados nos levaram a indagar sobre a força do discurso físico-empresarial, especialmente o marketing, na constituição desta ocupação profissional. Jeremy Rifkin, Zygmunt Bauman, Paula Sibilia e Denise Sant'Anna permitiram visualizar que o marketing dirigido ao personal trainer tem como tarefa reinventar, ressignificar e "repaginar" esta modalidade de serviço em nome da sobrevivência no disputado mercado da vida ativa.

  18. NA48: rare decay results

    International Nuclear Information System (INIS)

    Recent results on the kaon rare decays: KS → γγ, KS,L → π+π-e+e- and KS → π0e+e- measured in NA48 experiment at CERN, are presented in this paper. These results are based on data taken in 1998 and 1999, during 2 days in 1999 data was recorded with a factor 200 higher beam intensity than the usual KS beam, resulting in 2.3 * 108 KS decays. Among other results the following branching ratios have been computed : BR(KS → γγ) = (2.58 ± 0.36 ± 0.22)*10-6, BR(KL → π+π-e+e-) = (3.1 ± 0.1 ± 0.2)*10-7, BR(KS → π+π-e+e-) = (4.3 ± 0.2 ± 0.3)*10-5 and BR(KS → π0e+e-) -7. (A.C.)

  19. A proposal for positive cooperation in anion-cation binding in yttrium and lutetium complexes based on o-amino-substituted phenolate ligands. On the way to coordination polymers by self-assembly. Molecular structures of [ClLu(OAr)3Na] (X-ray) and [ClY(OAr')3Y(OAr')3Na] (X-ray and 89Y-NMR)

    OpenAIRE

    van Koten, G; Hogerheide, M.P.; Ringelberg, S.N.; Grove, D.M.; Jastrzebski, J.T.B.H.; Boersma, J.; Smeets, W.J.J.; Spek, A.L.

    1996-01-01

    Unique hetero(poly)metallic complexes [ClM(OAr)3Na] (M = Lu (3a), Y (3b)) and [ClY(OAr')3Y(OAr')3Na] (4) containing the bis (OAr = OC6H2(CH2NMe2)2-2,6-Me-4) and mono (OAr' = OC6H4(CH2NMe2)-2) o-amino-substituted phenolate ligands have been synthesized and characterized by NMR (1H, 13C, and 89Y) and X-ray structure determinations (3a and 4). Crystals of 3a are triclinic, space group P, with unit cell dimensions a = 10.706(1) Å, b = 14.099(2) Å, c = 18.882(3) Å, = 93.48(1), = 99.49(1), = 108.72...

  20. Studies on NaXe Clusters

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The chemical shift of 23Na in excimer NaXe was measured by using nuclear magnetic resonance (NMR) spectra, which is in good agreement with the theoretical value obtained by ab initio calculations. The bond length, dissociation energy, dipole of NaXe and Mulliken charges at Na and Xe in NaXe were calculated, respectively. The spectra of ultraviolet (UV) fluorescence and surface-enhanced Raman scattering of NaXe were also measured.

  1. VPLIV MEDIJEV NA PORAST KRIMINALITETE

    OpenAIRE

    Plešivčnik, Petra

    2011-01-01

    V diplomski nalogi sem podrobneje predstavila vpliv medijev na kriminaliteto in skušala ugotoviti ali imajo mediji kakšen vpliv na porast le-te. V prvem poglavju sem se osredotočila na zastavitev nekaterih hipotez skozi diplomsko nalogo, nato pa nadaljevala z razvojem medijev, razčlenitvijo množičnih medijev in predstavila nekaj njihovih učinkov. V tretjem poglavju sem povzela korelacijo med nasiljem in posameznikom, ter bolj konkretno nadaljevala s predstavitvijo same kriminalitete v medijih...

  2. VPLIV KULTURE NA MOTIVACIJO ZAPOSLENIH

    OpenAIRE

    Gjergjek, Andreja

    2012-01-01

    Pri diplomskem delu smo se osredotočili na proučevanje kulture in motivacije. Opredelili smo pojem kulture in njene sestavine. V okviru nacionalne kulture smo opredelili dela Hofsteda, Trompenaarsa, Halla, Ronena in Shenkara. V nadaljevanju smo opredelili pojem motivacije in predstavili motivacijske dejavnike. Pojasnili smo tudi vpliv kulture na motivacijo zaposlenih. Kultura je način ţivljenja pripadnikov neke druţbe. Obsega celotno področje idej, navad, prepričanj, jezika, vzorcev vedenj...

  3. PLESNE DELAVNICE NA RAZREDNI STOPNJI

    OpenAIRE

    Perša, Simona

    2012-01-01

    V diplomskem delu z naslovom Plesne delavnice na razredni stopnji so predstavljene težave, s katerimi se srečujejo učenci 1. in 2. vzgojno-izobraževalnega obdobja pri učenju plesa ter poklic plesnega pedagoga. V teoretičnem delu je osvetljena vloga plesa v šolah, vpliv in pomen plesa na otrokov razvoj, ples kot dejavnost otrok in poučevanje plesa z vidika plesnega pedagoga. Praktični del ponuja izdelane, preizkušene, analizirane priprave za plesne delavnice na razredni stopnji. V okviru plesn...

  4. VPLIV OSEBNOSTI NA STILE VODENJA

    OpenAIRE

    Vučak, Petra

    2009-01-01

    Nekatere naše vrline krasijo zlate lastnosti, druge pa kvarijo sivi odtenki. Če bi ljudje razumeli in spoznali svojo osebnost, ter osebnostne tipe drugih ljudi, bi se problemi pri komunikaciji občutno zmanjšali. Takrat bi namreč lažje uvideli, zakaj je nekdo reagiral na način, kot je ali zakaj je nekdo dejal to, kar je. Smisel tega je, da spoznamo svoje dobre lastnosti, ki jih lahko še bolj razvijemo, slabe pa poskušamo nadzorovati in tako zmanjšati njihov vpliv. Iskanje uspešnih in učink...

  5. Uwarunkowania procesu transformacji na Ukrainie

    OpenAIRE

    Michalski, Tomasz; Kuczabski, Aleksander

    2014-01-01

    W pierwszej części artykułu omówiono główne czynniki (wewnętrzne i zewnętrzne), które wpłynęły na procesy transformacji ustrojowej w europejskich i zakaukaskich krajach postkomunistycznych. W drugiej części artykułu skupiono się na czynnikach, które zadecydowały, że jak dotychczas proces transformacji ustrojowej na Ukrainie jest bardzo słabo zaawansowany.

  6. TRGOVANJE NA IZBRANEM TRGU - FOREX

    OpenAIRE

    Ambrož, Sabina

    2012-01-01

    V delu diplomskega seminarja je obravnavana tematika trgovanja na valutnem trgu. Trgovanje z valutami je v zadnjem desetletju doseglo velik razvoj, močno pa je narasla tudi priljubljenost valutnega trga Forex, saj se zaradi enostavnega pristopa in možnosti velikih zaslužkov zanj odloča vse več posameznikov. V teoretičnem delu povzamemo ključne elemente, ki jih mora poznati začetnik na tem trgu. V empiričnem delu pa poskušamo na praktičnem primeru pokazati primer trgovanja s trendom in vstopom...

  7. 论思想建党与制度治党%ON Ideology-based Party BuildiNg aNd INstitutioN-based Party GoverNaNce

    Institute of Scientific and Technical Information of China (English)

    石仲泉

    2015-01-01

    实现“两个一百年”目标,实现中华民族伟大复兴的中国梦,必须把我们的党建设好。把党建设好必须遵从两条原则:一是发扬党的优良传统坚持思想建党;二是做到党要管党坚持从严治党、制度治党。纵观党的成长发展,总结党的历史经验,我们得到以下结论:思想建党是中国共产党成为先进政党的伟大创造;思想建党是中国共产党的独特优势和长期执政之魂;思想建党只有进行时,没有完成时;思想建党,必须伴随制度治党。%To realize the goal of“two centuries”and actualize the China Dream of great rejuvenation of the Chi-nese nation,we must do well the work of party building. To build the Party well,two principles must be followed. First,we must carry forward the Party’s good tradition and persist in ideology-based party building. Second,the Party must supervise its conduct and persist in strengthening party discipline and institution-based party gov-ernance. Looking into the Party’s growth and development process and summarizing the historical experiences, we can draw the following conclusions:ideology-based party building is a great creation that has made the CPC an advanced party;it is the unique advantage of the CPC and the soul of its long-term ruling;it is always in process and will never be finished;and it must be accompanied by institution-based party governance.

  8. Nursing diagnosis: educational strategy based on problem-based learning Diagnóstico de enfermería: estrategia educativa fundamentada en el aprendizaje basado en problemas Diagnóstico de enfermagem: estratégia educativa fundamentada na aprendizagem baseada em problemas

    Directory of Open Access Journals (Sweden)

    Ana Luisa Brandão de Carvalho Lira

    2011-08-01

    Full Text Available This study aimed to evaluate the effectiveness of a teaching strategy on nursing diagnoses based on problem-based learning in the performance of clinical reasoning and diagnostic trial of undergraduate students. Experimental study conducted in two phases: content validation of problems and implementation of educational strategy. The results showed improvement in the data pooling ability of students in the experimental group. It is concluded that the strategy put in practice exerted a positive influence.Este estudio tuvo por objetivo evaluar la eficacia de una estrategia de enseñanza sobre diagnósticos de enfermería fundamentada en el aprendizaje basado en problemas en el desempeño del raciocinio clínico y juzgamiento diagnóstico de los estudiantes de graduación. Se trata de estudio experimental, realizado en dos fases: validación de contenido de los problemas y aplicación de la estrategia educativa. Los resultados mostraron mejoría en la capacidad de agrupamiento de los datos de los estudiantes del grupo experimental. Se concluye que hubo influencia positiva de la estrategia implementada.Este estudo teve por objetivo avaliar a eficácia de uma estratégia de ensino sobre diagnósticos de enfermagem, fundamentada na aprendizagem, baseada em problemas no desempenho do raciocínio clínico e julgamento diagnóstico dos discentes de graduação. É estudo experimental, realizado em duas fases: validação de conteúdo dos problemas e aplicação da estratégia educativa. Os resultados mostraram melhora na capacidade de agrupamento dos dados dos discentes do grupo experimental. Conclui-se que houve influência positiva da estratégia implementada.

  9. Critérios para aplicação de ABC (Activity Based Costing na indústria naval Criteria for applying Activity Based Costing (ABC in the naval construction industry

    Directory of Open Access Journals (Sweden)

    Nélio Achão Filho

    2003-01-01

    Full Text Available O presente trabalho tem por objetivo conceituar o que é ABC (Activity Based Costing e apresentar, de forma sistemática, uma sugestão de critérios para aplicação em empresa de construção naval. Basicamente, o estudo pretende contribuir, através do efeito demonstração do estudo de caso, para a conscientização quanto as dificuldades e oportunidades oferecidas pela implementação de um sistema ABC, numa área carente de novas metodologias gerenciais.The objective of this article is to evaluate what ABC (Activity Based Costing is, and to present, in a systematic form, a suggestion for the implantation of criteria for aplication at a naval construction company. Basically, the study intends, through the case study demo, make executives aware of the dificulties and oportunities offered by the implementation of an ABC system, in an area in need of new managerial methods.

  10. Cuidador de idosos: conhecimento disponível na base de dados LILACS Cuidador de ancianos: conocimiento disponible en la basis de datos LILACS Elderly caregiver: the knowledge available in LILACS database

    Directory of Open Access Journals (Sweden)

    Leidimar Cardoso Nascimento

    2008-08-01

    Full Text Available O estudo objetivou analisar a produção científica sobre o cuidador de idoso. Foi utilizada como abordagem metodológica a revisão bibliográfica na base de dados LILACS, no período de 2000 a 2007. Analisou-se os resumos de sessenta e quatro artigos sendo categorizados pelo ano de publicação, cenário, metodologia abordada e temática apresentada. Como resultado, foi observado que em 2004 ocorreu o maior número de publicações, destacando a região sudeste, quanto ao cenário à prevalência de escolha foi o domicílio e a abordagem metodológica foi a do tipo qualitativa, sendo as temáticas agrupadas em quatro áreas a seguir: cuidado ao idoso institucionalizado, a família e o cuidado ao idoso, o cuidado e suas implicações éticas e idoso e o cuidado de enfermagem.Este artículo visó analizar la producción científica sobre la asistencia a los ancianos. Se utilizó como metodologia revisión bibliográfica en la base de datos LILACS, entre 2000 hasta el 2007. Sesenta y cuatro resúmenes de los artículos fueran clasificados por año de publicación, el escenario, la metodología enfocada y el tema presentado. Como resultado, se observó el mayor número de publicaciones en 2004, predominantemente en el sureste de Brasil. Cuanto al escenario la prevalencia de la elección fue el domicilio y el enfoque metodológico es del tipo cualitativo, con los temas agrupados en cuatro áreas, a continuación: el cuidado de los ancianos institucionalizados, de la familia y de los ancianos, la atención y sus implicaciones éticas y atención de enfermería.This study aimed at analyzing the scientific production about the elderly assistance. Bibliographic review was utilized as a methodological approach based on 2000-2007 LILACS data base. Sixty-four abstracts of the articles were analyzed and categorized per year of publication of the scenery and the methodology and theme presented. As a result, it was noticed that in 2004 there was the largest

  11. Results from NA61/SHINE

    Directory of Open Access Journals (Sweden)

    Unger M.

    2013-06-01

    Full Text Available In this paper we summarize recent results from NA61/SHINE relevant for heavy ion physics, neutrino oscillations and the interpretation of air showers induced by ultra-high energy cosmic rays.

  12. Dialogia do riso: um novo conceito que introduz alegria para a promoção da saúde apoiando-se no diálogo, no riso, na alegria e na arte da palhaçaria Dialogy of Laughter: a new concept introducing joy for health promotion based on dialogue, laughter, joy and the art of the clown

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Campos Matraca

    2011-10-01

    Full Text Available Apresentamos e debatemos a Dialogia do Riso, um conceito baseado na prática da educação popular em saúde desenvolvida com alegria. Saúde entendida como um recurso para a vida e não como um objetivo de viver; promoção da saúde como uma reação positiva que leva a uma percepção ampliada, integrada, complexa e intersetorial: articula ambiente, educação, pessoas, estilo e qualidade de vida. O riso pode então ser incorporado como ferramenta de promoção da saúde, tese que defendemos. Para isso apresentamos considerações sobre o diálogo, o riso, a alegria e o palhaço, conceituando a Dialogia do Riso. O diálogo, fala entre duas ou mais pessoas para entendimento de alguma ideia mediada pela comunicação, é uma metodologia de reflexão conjunta, que visa melhorar a produção de novas ideias e compartilhar significados, essência da comunicação. O riso é um fenômeno universal, condicionado a aspectos da cultura, da filosofia, da história e da saúde; é dialógico, porque, através do humor nos deparamos com a comédia e o escárnio que existe por traz de cada riso, um código de comunicação inerente à natureza humana. Arrolamos argumentos para defender a alegria como estratégia para a promoção da saúde, e adotamos o palhaço, e usamos sua arte como ferramenta educacional que pode ser integrada como tecnologia social.The Dialogy of Laughter - a concept based upon the praxis of general health education performed with joy - is presented and discussed. Health is seen as a resource for life rather than a goal in life and promotion of health is a positive reaction leading to a broader, integrated and complex perception linking the environment, education, people, quality and style of life. Laughter can then be incorporated as a tool in health promotion as defended here. Considerations on dialogue, laughter, joy and the clown giving rise to the Dialogy of Laughter concept are presented. Dialogue, namely an exchange between

  13. Base genética do hábito de crescimento e florescimento em tomateiro e sua importância na agricultura Genetic basis of growth habit and flowering in tomato and its importance in agriculture

    Directory of Open Access Journals (Sweden)

    Fernando Angelo Piotto

    2012-11-01

    Full Text Available Variedades ou híbridos de tomateiro utilizados para produção de molhos e ketchups costumam ter hábito determinado, enquanto a maioria dos genótipos utilizados na produção para mesa (consumo in natura possuem hábito indeterminado. Além de influenciar no manejo da cultura, o hábito de crescimento pode alterar parâmetros de produtividade, como o teor de sólidos solúveis totais (SST nos frutos. O hábito de crescimento é controlado principalmente pelo gene SELF-PRUNING (SP, que é um dos componentes de uma pequena família gênica da qual faz parte também o gene SINGLE FLOWER TRUSS (SFT, atualmente considerado um dos componentes do tão buscado "florígeno". O entendimento da função bioquímica e o efeito fisiológico de tais genes em interação com o ambiente e outros genes (epistasia possibilita a manipulação de parâmetros como precocidade e SST. Além disso, fornece subsídios para compreender a base genética do crescimento semideterminado, que combina vantagens do hábito determinado e indeterminado, podendo ser usado pelos melhoristas de plantas para o desenvolvimento de novas cultivares.Hybrids or open pollinated tomato cultivars used for sauces and ketchups production usually has determinate growth habit, while most of the genotypes used in the production to salads (in natura consumption has indeterminate growth habit. Additionally, growth habit can have influence on culture management, productivity and total soluble solids (TSS in fruits. The growth habit is mainly controlled by the gene SELF-PRUNING (SP, which is a component of a small gene family which is also part of the gene SINGLE FLOWER TRUSS (SFT, currently considered one of the components so sought after 'florigin'. Understanding the biochemical function and physiological effect of such genes in interaction with the environment and other genes (epistasis, allows the manipulation of parameters such as precocity and TSS. It also provides subsidies to understand

  14. Análise Bioestratigráfica com Base em Foraminíferos de Três Testemunhos da Região do Leque Almirante Câmara na Bacia de Campos, RJ.

    Directory of Open Access Journals (Sweden)

    David Bentes

    2007-07-01

    Full Text Available A Bacia de Campos é a principal áreaprodutora de hidrocarbonetos do país. A descobertade campos gigantes nessa bacia levou à intensificaçãodos estudos dos depósitos em águas profundas ehiperprofundas, tanto da dinâmica de sua gênese eevolução, quanto da tecnologia de produção. Assim,o estudo da bioestratigrafia do Quaternário dessabacia adquire importância, pois fornece uma molduraestratigráfica para a reconstituição da sedimentaçãonessa área. O objetivo do presente trabalho consisteno reconhecimento de biozonas com base emforaminíferos e na correlação estratigráfica de poçosperfurados no talude continental. O material estudadoé proveniente de três testemunhos coletados em2001, no Sistema Almirante Câmara (lâmina d’águaentre 1050 e 2400 m, pelo projeto “ImageamentoGeofísico do Sistema Turbidítico Moderno em ÁguasProfundas da Bacia de Campos”, desenvolvidopelo Depto. de Geologia/UFRJ em parceria com aPETROBRAS. Foram analisadas 77 amostras, comespaçamento de 3cm a 30cm, de acordo com critérioslitológicos e com a necessidade de um detalhamentomaior dos intervalos estudados. Em laboratório, asamostras foram pesadas (10 g e processadas segundometodologia tradicional para estudo de microfósseiscalcários. Em seguida, cada amostra foi peneiradaa seco para triagem, identificação e contagem. Aidentificação e classificação taxônomica seguiuBolli & Saunders (1985. In: Bolli et al. PlanktonStratigraphy e Kennet & Srinivasan (1983. NeogenePlanktonic Foraminifera: a Phylogenetic Atlas. Obiozoneamento utlizado como referência foi o deEricson & Wollin (1968. Sciences, v.162, refinadopor Vicalvi (1997, Bol.Geoci.Petrobras, v.11, n.1/2;1999. PPGG/UFRJ,Tese D.Sc.. Foram reconhecidasas biozonas Z (Holoceno, Y e X (Pleistoceno Finale identificado um possível hiato, englobando ointervalo Y5 – Y2; as taxas de sedimentação foramcalculadas para os intervalos Z, parte superior de Y1e Y1 total.

  15. Ecotoxicological evaluation of three deicers (NaCl, NaFo, CMA)-effect on terrestrial organisms.

    Science.gov (United States)

    Robidoux, P Y; Delisle, C E

    2001-02-01

    The use of chemical deicers such as sodium chloride (NaCl) has increased significantly during the past three decades. Deicers induce metal corrosion and alter the physicochemical properties of soils and water. Environmental damage caused by the use of NaCl has prompted government agencies to find alternative deicers. This article presents a comparative ecotoxicological study of three deicers on soil organisms. Sodium formiate (NaFo) and calcium-magnesium acetate (CMA) are the most interesting commercially available deicers based upon their characteristics and potential toxicity. Organisms used in this study were four species of macrophytes (cress (Lepidium sativum), barley (Ordeum vulgare), red fescue grass (Festuca rubra), Kentucky bluegrass (Poa pratensis)) and an invertebrate (Eisenia fetida). Using standardized and modified methods, the relative toxicity of deicers was CMA NaFo congruent with NaCl. The results demonstrate that these chemicals could have similar impacts in terrestrial environments since similar quantities of NaFo and greater amounts of CMA are necessary to achieve the same efficiency as NaCl. The toxicity of the tested substances was lower in natural composted soil than in artificial substrate (silica or OECD soil), indicating decreased environmental bioavailability. The response of the organisms changed according to endpoint, species, and soil characteristics (artificial substrate as compared to natural organic soil). The most sensitive endpoint measured was macrophyte growth with Kentucky bluegrass being the most sensitive species. PMID:11161687

  16. Sustentabilidade de empresas de base florestal: o papel dos projetos sociais na inclusão das comunidades locais Sustainability of florest based enterprises: the role of social projects in the inclusion of the local communities

    Directory of Open Access Journals (Sweden)

    Antônio do Nascimento Gomes

    2006-12-01

    Full Text Available A partir de estudo de casos, buscou-se interpretar as ações sociais de empresas produtoras de celulose de fibra curta de mercado, localizadas no Estado do Espírito Santo e extremo sul da Bahia, com vistas a verificar a sua consistência com a estratégia de sustentabilidade empresarial. Buscou-se, também, caracterizar seus programas de ações sociais e sua abrangência, ao analisar o conteúdo dos instrumentos de divulgação das ações sociais das empresas e identificar a concepção que tem orientado essas ações sociais e sua relação com as comunidades influenciadas pelas suas áreas de produção de eucalipto.The objective of this study was to interpret, based on case studies, the social actions of short fiber market pulp companies, located in the States of Espírito Santo and extreme South of Bahia, in order to verify their consistency with the strategy of business sustainability; to characterize their programs of social actions and their scope, by analyzing the content of the communication tools of these companies' social actions, and to identify the conception that has guided their social actions and the relationship with the communities influenced by their areas of eucalyptus production.

  17. O, Na, Ba and Eu abundance patterns in open clusters

    CERN Document Server

    MacLean, B T; Lattanzio, J

    2014-01-01

    Open clusters are historically regarded as single-aged stellar populations representative of star formation within the Galactic disk. Recent literature has questioned this view, based on discrepant Na abundances relative to the field, and concerns about the longevity of bound clusters contributing to a selection bias: perhaps long-lived open clusters are chemically different to the star formation events that contributed to the Galactic disk. We explore a large sample of high resolution Na, O, Ba & Eu abundances from the literature, homogenized as much as reasonable including accounting for NLTE effects, variations in analysis and choice of spectral lines. Compared to a template globular cluster and representative field stars, we find no significant abundance trends, confirming that the process producing the Na-O anti-correlation in globular clusters is not present in open clusters. Furthermore, previously reported Na-enhancement of open clusters is found to be an artefact of NLTE effects, with the open cl...

  18. Rechargeable Room-Temperature Na-CO2 Batteries.

    Science.gov (United States)

    Hu, Xiaofei; Sun, Jianchao; Li, Zifan; Zhao, Qing; Chen, Chengcheng; Chen, Jun

    2016-05-23

    Developing rechargeable Na-CO2 batteries is significant for energy conversion and utilization of CO2 . However, the reported batteries in pure CO2 atmosphere are non-rechargeable with limited discharge capacity of 200 mAh g(-1) . Herein, we realized the rechargeability of a Na-CO2 battery, with the proposed and demonstrated reversible reaction of 3 CO2 +4 Na↔2 Na2 CO3 +C. The battery consists of a Na anode, an ether-based electrolyte, and a designed cathode with electrolyte-treated multi-wall carbon nanotubes, and shows reversible capacity of 60000 mAh g(-1) at 1 A g(-1) (≈1000 Wh kg(-1) ) and runs for 200 cycles with controlled capacity of 2000 mAh g(-1) at charge voltage clean recycling and utilization of CO2 . PMID:27089434

  19. Trabalhando com estratégias de ensino-aprendizado por descoberta na área da saúde: a problematização e a aprendizagem baseada em problemas Discovery-based teaching and learning strategies in health: problematization and problem-based learning

    Directory of Open Access Journals (Sweden)

    Eliana Goldfarb Cyrino

    2004-06-01

    Full Text Available Considerando os processos de mudança no ensino em saúde e a demanda por novas formas de trabalhar com o conhecimento no ensino superior, discutem-se dois caminhos metodológicos inovadores no ensino na área da saúde: a aprendizagem baseada em problemas (ABP e a problematização. Descrevendo suas raízes teóricas, procura-se identificar os seus princípios orientadores. Enquanto propostas distintas, ambas contribuem para rever o processo de ensino-aprendizagem: a problematização, voltando-se para a construção do conhecimento no contexto de uma formação crítica; a ABP, voltando-se para os aspectos cognitivos do processo de construção de conceitos e apropriação dos mecanismos básicos da ciência. Tanto a problematização como a ABP levam a rupturas com a forma tradicional de ensinar e aprender, estimulando gestão participativa dos protagonistas da experiência e reorganização da relação teoria/prática. A crítica às possibilidades e limites de cada proposta, valendo-se da análise de seus fundamentos teórico-metodológicos, leva-nos a concluir que experiências pedagógicas apoiadas na ABP e/ou na problematização, podem representar um movimento inovador no contexto da educação na área da saúde favorecendo rupturas e processos mais amplos de mudança.Considering the changes in teaching in the health field and the demand for new ways of dealing with knowledge in higher learning, the article discusses two innovative methodological approaches: problem-based learning (PBL and problematization. Describing the two methods' theoretical roots, the article attempts to identify their main foundations. As distinct proposals, both contribute to a review of the teaching and learning process: problematization, focused on knowledge construction in the context of the formation of a critical awareness; PBL, focused on cognitive aspects in the construction of concepts and appropriation of basic mechanisms in science. Both

  20. Intervenção de base comunitária para a prevenção das DST/Aids na região amazônica, Brasil Community-based intervention to control STD/AIDS in the Amazon region, Brazil

    Directory of Open Access Journals (Sweden)

    Adele Schwartz Benzaken

    2007-12-01

    Full Text Available OBJETIVO: Descrever estudo de caso de intervenção de base comunitária, desenvolvido na perspectiva construcionista-emancipatória, para o controle das DST/Aids. MÉTODOS: Estudo descritivo desenvolvido no município de Manacapuru, Amazonas, de 1997-2004, sobre a utilização de procedimentos desenhados em colaboração com agentes governamentais, profissionais de saúde e comunidade. Foram levantados dados sobre a dinâmica da prostituição e a venda de preservativos na cidade, características comportamentais, avaliação do processo e da assistência às DST/Aids. Sincronicamente, estabeleceram-se ações de prevenção e assistência na rede pública de saúde às DST, centro de testagem, sistema de vigilância epidemiológica, e capacitação de trabalhadoras do sexo. RESULTADOS: Observou-se o fortalecimento das trabalhadoras do sexo como multiplicadoras e sua legitimação como cidadãs e agentes de saúde em projetos com travestis, homossexuais e escolares. Houve incremento da venda de preservativos na cidade, da utilização de preservativos entre trabalhadoras do sexo, redução das DST bacterianas e estabilização da ocorrência de infecção pelo HIV/Aids e sífilis congênita. A sustentabilidade do programa de intervenção estudado, organizado no âmbito do Sistema Único de Saude, foi estimulada pela pactuação política garantindo sede e orçamento regulamentado em lei municipal, e pelo debate permanente dos resultados do processo e programa. CONCLUSÕES: O estudo fortaleceu a noção de que o controle efetivo das DST/Aids depende de uma abordagem sinérgica que combine intervenções no plano individual (biológica-comportamental, sociocultural e programático.OBJECTIVE: To describe a case study of community-based intervention, developed in a constructionist-emancipatory framework to control STD/AIDS. METHODS: Descriptive study developed in the town of Manacapuru, in the state of Amazonas, from 1997 to 2004, focusing on

  1. Construction of scientific production indicators based on scientometrics analysis of IPEN dissertations and theses; Elaboracao de indicadores de producao cientifica com base na analise cientometrica das dissertacoes e teses do IPEN

    Energy Technology Data Exchange (ETDEWEB)

    Igami, Mery Piedad Zamudio

    2011-07-01

    Construction of Indicators plays an important role in the contemporaneous society. It could be observed their ordinary use by all the activities segments. In scientific area it is not different; such practice has already been consolidated; this statement could be corroborated by the innumerous papers published about this matter in the main databases; however, there is a prevalence of quantitative studies, which obtain data from the international databases, analyzing journal articles. Concerning this finding, the main objective of this study was to elaborate scientific indicators from a local institutional data base, using as a corpus of the study the dissertations and theses, produced by a graduate program in the period of 1977 to 2009.Three types of two-dimensional indicators were obtained by using bibliometric techniques: numerical, thematic and productivity. For dissertations and theses thematic characterization it was used the Subject categories and scope descriptions and the International Nuclear Information System Thesaurus (INIS). Through the statistical technique of clustering analysis, it was possible to classify them in five main groups, showing former performance and growth future trends of each group; for data extraction about theses productivity, regarding articles published; the Curriculo Lattes, and the local institutional database were used. Co-word analysis technique was used to establish a more precise correlation, between articles and theses, and for this purpose it was used the keywords from a controlled vocabulary. In order to validate the results, it was performed a survey, with the theses authors. Results obtained indicated that 55.9% of the articles published, between 5 years, before and after the thesis presentation, are strongly correlated to it. It was also observed that, correlated articles have been published, in an average of, 1, 63 year before the thesis presentation. Concerning databases, it was shown that they are valuable tools and

  2. Study of the influence of zirconium and gallium on the magnetic properties and microstructures of praseodymium-based permanent magnets; Estudo da influencia do zirconio e galio nas propriedades magneticas e na microestrutura dos imas permanentes a base de praseodimio

    Energy Technology Data Exchange (ETDEWEB)

    Fusco, Alexandre Giardini

    2006-07-01

    In this work was studied the influence of the addition of 0.5 at. % of zirconium and gallium on praseodymium-based HD sintered magnets obtained using a mixture of alloys. The alloys used in this study were: Pr{sub 12.6}Fe{sub 68.3}Co{sub 11.6}B{sub 6}Zr{sub 0.5}Ga{sub 1}, Pr{sub 16}Fe{sub 75.5}B{sub 8}Zr{sub 0.5}, Pr{sub 13}Fe{sub 80.5}B{sub 6}Zr{sub 0.5}. The investigation started by measuring the magnetic properties and observing the microstructure of the magnets. After that, the magnets were annealed at 1000 deg C for 2 hours followed by rapid cooling, in a total of 10 hours. This heat treatment was followed by 5 hours at the same temperature up to a total of 35 hours. Changes in the microstructure were compared to the change in the magnetic properties aiming at a proper understanding of the role of each added element in relation to the magnetically hard phase (phase {phi}). It has been shown that gallium and zirconium act as grain refiners of the matrix phase {phi}. Gallium acts in the grain and favoring of the shape stability and improvement of the magnetic properties. For the Pr{sub 14.3}Fe{sub 71.9}Co{sub 5.8}B{sub 7}Zr{sub 0.5}Ga{sub 0.5} sintered magnet the evolution of the magnetic properties after 15 hours heat treatment was: remanence from (1.25{+-}0.02) T to (1.30{+-}0.02) T, intrinsic coercivity from (1.11{+-}0.02) T to (0.87{+-}0.02) T, squareness factor from (0.68{+-}0.02) to (0.82{+-}0.02) and energy product from (285{+-}5) kJ/m{sup 3} to (317{+-}5) kJ/m{sup 3}. Zirconium has two effects on the sintered magnets. Firstly, avoiding random grain growth and enhancing anisotropy. However, by concentrating on the grain boundaries, yield reverse domains and is detrimental to the intrinsic coercivity. For the sintered Pr{sub 14.5}Fe{sub 78}B{sub 7}Zr{sub 0.5} magnet the evolution of the magnetic properties achieved after a heat treatment of 15 hours was: remanence from (1.19{+-}0.02) T to (1.25{+-}0.02) T, coercivity from (0.74{+-}0.02) T to (0

  3. Anodic Corrosion Behavior of NiFe2O4-Based Cermet in Na3AlF6-K3AlF6-AlF3 for Aluminum Electrolysis

    Science.gov (United States)

    Tian, Zhongliang; Lai, Yanqing; Yang, Shu; Li, Jie; Hwang, Jiann-Yang; Liu, Yexiang

    2015-03-01

    A (Cu,Ni)/(10NiO-NiFe2O4) cermet was tested as an inert anode for aluminum electrolysis in Na3AlF6-K3AlF6-AlF3 melt at 1173 K (900 °C), and its corrosion behavior was studied. The results show that the low-temperature Na3AlF6-K3AlF6-AlF3 bath is beneficial, improving the service conditions. With the combined effects of the electrolyte composition and the nascent oxygen during electrolysis, the metal phase (Cu,Ni) at the surface of anode will not be leached preferentially, but be transferred into the aluminates including FeAl2O4, NiAl2O4 and CuAl2O4. This is helpful for the anode to improve its corrosion resistance.

  4. Band gap modification and ferroelectric properties of Bi{sub 0.5}(Na,K){sub 0.5}TiO{sub 3}-based by Li substitution

    Energy Technology Data Exchange (ETDEWEB)

    Quan, Ngo Duc [Department of General Physics, School of Engineering Physics, Ha Noi University of Science and Technology, 1 Dai Co Viet road, Ha Noi (Viet Nam); International Training Institute for Materials Science, Hanoi University of Science and Technology, 1 Dai Co Viet road, Hanoi (Viet Nam); Hung, Vu Ngoc [International Training Institute for Materials Science, Hanoi University of Science and Technology, 1 Dai Co Viet road, Hanoi (Viet Nam); Quyet, Nguyen Van [Hanautech Co., Ltd., 832, Tamnip-dong, Yuseong-gu, Daejeon (Korea, Republic of); Chung, Hoang Vu [Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet street, Hanoi (Viet Nam); Dung, Dang Duc, E-mail: dung.dangduc@hust.edu.vn [Department of General Physics, School of Engineering Physics, Ha Noi University of Science and Technology, 1 Dai Co Viet road, Ha Noi (Viet Nam)

    2014-01-15

    We report on the reduction of band gap in Bi{sub 0.5}(Na{sub 0.82-x}Li{sub x}K{sub 0.18}){sub 0.5}(Ti{sub 0.95}Sn{sub 0.05})O{sub 3} from 2.99 eV to 2.84 eV due to the substitutions of Li{sup +} ions to Na{sup +} sites. In addition, the lithium substitution samples exhibit an increasing of the maximal polarizations from 21.8 to 25.7 μC/cm{sup 2}. The polarization enhancement of ferroelectric and reduction of the band gaps are strongly related to the Li substitution concentration as evaluated via the electronegative between A-site and oxygen and tolerance factor. The results are promising for photovoltaic and photocatalytic applications.

  5. Analysis of the role of business incubator in internationalization of basic technology companies Análise do papel da incubadora na internacionalização de empresas de base tecnológica, incubadas e graduadas

    Directory of Open Access Journals (Sweden)

    Gabriela Gonçalves Silveira Fiates

    2013-05-01

    se constituem em ambientes potencializadores de redes de relacionamento, tanto entre as empresas incubadas e graduadas, como com agentes externos. E, finalmente, a terceira premissa é que a inovação é uma vantagem competitiva que alavanca o processo de internacionalização de empresas e mostra-se fundamental para o desempenho competitivo da empresa no mercado externo. A pesquisa a partir de casos de pequenas empresas de base tecnológica mostra-se relevante dada a necessidade do Brasil de estimular a inserção externa de empresas que comercializam produtos intensivos em tecnologia. A pesquisa é de caráter descritivo, na forma de um estudo multicaso com seis empresas, três incubadas e três graduadas. Os resultados apontam que a inovação configura-se realmente como a principal vantagem para a competição em mercados internacionais. De forma intencional e planejada, há uma aceleração do processo de internacionalização nas empresas mais jovens, já concebidas com uma visão global. Constatou-se que a incubadora favorece a formação de redes de relacionamento que estimulam a inovação e a interação com outros atores que podem fomentar o processo de internacionalização, no entanto, não há ações percebidas pelos empresários próprias para esta finalidade, o que aponta para uma oportunidade de ação sistemática das incubadoras no apoio à internacionalização de empresas.

  6. Reflexões sobre as bases conceituais que fundamentam a construção do conhecimento acerca da lombalgia na gestação Reflexiones sobre las bases conceptuales que fundamentan la construcción del conocimiento a cerca de la lumbalgia en el embarazo Low back pain in pregnancy in the perspective of the biomedical model: a critical analysis

    Directory of Open Access Journals (Sweden)

    Cristine Homsi Jorge Ferreira

    2001-05-01

    Full Text Available A lombalgia na gestação acomete cerca de 50% das gestantes, causando importantes transtornos sociais. Apesar disso, ela vem sendo considerada como uma ocorrência normal e até esperada na gravidez, o que tem contribuído para a falta de adoção de medidas profiláticas e de alívio. Buscamos neste trabalho compreender as bases conceituais históricas que originaram esta naturalização, usando como recorte a obstetrícia e como referência a literatura mundial sobre o tema indexada de 1987 à 1997. Apreendemos que a visão determinista relacionada ao problema respalda-se no modelo biomédico. Assim, a adoção de soluções efetivas requer a incorporação de um novo paradigma.La Lumbalgia en la gestación afecta cerca de 50% de las gestantes, causando importantes transtornos sociales. Aun ésta morbilidad es considerada como normal y es esperada durante la gravidez, lo que hay contribuido para la falta de adopción de medidas profilácticas y de alivio. Buscamos en este trabajo comprender las bases conceptuales históricas que originaron ésta concepción, usando como recorte la obstetricia y como referencia la literatura mundial sobre el tema indexada de 1987 a 1997. Aprendimos que la visión determinista relacionada con el problema se respalda en el modelo biomédico. Asi, la adopción de soluciones efectivas requiere la incorporación de un nuevo paradigma.Low back pain is a problem that is faced by 50% of pregnant women and causes important social trouble. In spite of this, the problem is considered to be normal and is expected during pregnancy, which has contributed to the lack of prophylactic and relief measures. This work aims at understanding the historical and conceptual bases that have given rise to such naturalization as outlined by midwifery and by using world literature indexed on the topic from 1987 to 1997 as a theoretical framework. We have apprehended that a deterministic view related to this issue is supported by the

  7. Utjecaj spola na pacijentovu procjenu nadomjestaka na gornjim prednjim zubima

    OpenAIRE

    KRISTEK ZORIĆ, Ela; Žagar, Maja; KNEZOVIĆ ZLATARIĆ, Dubravka

    2014-01-01

    Svrha rada: Željelo se istražiti zadovoljstvo pacijenata izgledom nadomjestaka na gornjim prednjim zubima i ustanoviti postoji li razlika u procjeni njihova izgleda s obzirom na spol. Materijali i metode: Dvjesto pacijenata ocjenjivalo je boju, anatomski oblik i površinsku teksturu nadomjestaka (kompozitni ispuni, fasetirane krunice, metalkeramičke i potpuno keramičke krunice) uspoređujući ih sa susjednim prirodnim zubima. Podatci su izraženi u prosječnim ocjenama boje, anatomskog oblika i po...

  8. Corpo e sexualidade na gravidez

    Directory of Open Access Journals (Sweden)

    Natalúcia Matos Araújo

    2012-06-01

    Full Text Available Estudo etnográfico que teve como objetivo compreender como as gestantes vivenciam os processos fisiológicos do seu corpo durante a gestação e a sua repercussão na sexualidade. A pesquisa envolveu sete mulheres residentes em bairro popular de São Paulo. Na coleta de dados, utilizou-se observação participante e entrevista com questões norteadoras. Os dados foram apresentados na forma de narrativa e posteriormente organizados nas categorias: Percebendo as transformações corporais; Convivendo com as mudanças no corpo; Sentimentos e sensações na vida sexual durante a gestação e imaginando o corpo e a sexualidade após a gestação. As mulheres referiram-se às transformações do corpo como desconfortos e expressaram a preocupação de que fossem definitivas. Expressaram o desejo de que, após o parto, o corpo volte a ser como era e que volte a sentir desejo sexual. O reconhecimento destes fatos constitui-se numa ferramenta primordial na adequação das práticas profissionais.

  9. All new for NA62

    CERN Multimedia

    Antonella Del Rosso

    2012-01-01

    This week sees the start of the first run of the new NA62 experiment. This will be a unique opportunity for the collaboration to test its new beam, new detectors and new data acquisition system before the physics run in 2014. Speaking to the Bulletin, the NA62 technical coordinator Ferdinand Hahn shares the many challenges that the various teams faced to be on time for beam. Ready, steady, start!   A Large Angle Veto detector (white) in place in the NA62 decay volume (blue). With components from almost all the detectors in place downstream of the decay point of the mother particles – the kaons – and of the KTAG detector that tags the kaons before they decay, NA62 is ready for its first technical run. This unique run will test all the equipment as well as the trigger and the data acquisition systems. “This year, we will have about five weeks of beam from the SPS before the long shutdown of all the CERN machines,” says Ferdinand Hahn, NA62 Technical Co-...

  10. Filmes e coberturas comestíveis compostas à base de amidos nativos e gelatina na conservação e aceitação sensorial de uvas Crimson Films and edible coatings based on native starches and gelatin in the conservation and sensory acceptance of Crimson gra

    Directory of Open Access Journals (Sweden)

    Farayde Matta Fakhouri

    2007-06-01

    Full Text Available Filmes compostos de gelatina com amidos nativos de trigo, sorgo, batata e arroz foram produzidos separadamente e caracterizados quanto às propriedades físico-químicas (solubilidade em água e barreira ao vapor de água, físicas (espessura e opacidade e mecânicas (resistência à tração e porcentagem de elongação na ruptura. As mesmas soluções filmogênicas foram preparadas e aplicadas em uvas Crimson para avaliação sensorial e acompanhamento da perda de massa durante 22 dias. As coberturas de sorgo e arroz foram as mais eficientes na extensão da vida útil (aumento de 10 dias. Entretanto, em relação aos atributos sensoriais, as uvas com cobertura de arroz não diferiram estatisticamente do controle, que apresentou as menores notas para os parâmetros de aparência global e intenção de compra. O filme de sorgo apresentou uma permeabilidade ao vapor de água de 5,40 g.mm.m-2.d.kPa, resistência à tração de 85,89 MPa, elongação de 6,61% e opacidade de 40%. Mesmo não apresentando os melhores valores de caracterização, como filme, tornou-se a melhor opção como cobertura. Na avaliação sensorial, as uvas cobertas obtiveram aceitação igual ou maior que o controle quanto à aparência global, brilho, cor e intenção de compra. Na degustação das uvas, nenhuma das coberturas exerceu influência significativa no aroma, sabor e textura, sendo aceitas pelo consumidor em todos os parâmetros.Films based on gelatin and native starches from wheat, sorghum, potato and rice were produced separately and characterized as to their physical-chemical (water solubility and water vapor permeability, physical (thickness and opacity and mechanical (resistance to traction and percentage elongation at rupture properties. The same solutions were prepared and applied to Crimson grapes for sensory evaluation and determination of weight loss over 22 days. The sorghum and rice coatings were the most efficient in their extending shelf life (a ten

  11. Contribuições para a evolução do gerenciamento de resíduos sólidos urbanos no Brasil com base na experiência Européia

    Directory of Open Access Journals (Sweden)

    Camille Ferreira Mannarino

    2016-01-01

    Full Text Available RESUMO: Esse trabalho tem como objetivo apresentar dados relevantes sobre o gerenciamento de resíduos sólidos urbanos (RSU na Europa de forma a se estabelecer paralelos e subsidiar a discussão no Brasil. É apresentada uma contextualização da situação atual da gestão dos resíduos sólidos urbanos no Brasil, onde os efeitos da Política Nacional de Resíduos Sólidos já se fazem sentir, sobretudo com o aumento da disposição final de RSU em aterros sanitários, predominantemente nas regiões metropolitanas. A reciclagem no país, em grande parte, ainda baseia-se na coleta informal por catadores ou na ação de organizações privadas. Na Europa, a partir da Diretiva 1999/31/EC, que estabeleceu metas para a disposição de resíduos em aterros sanitários, e da Diretiva 94/62/EC, sobre recolhimento de embalagens, a gestão de RSU se alterou profundamente. São apresentados dados das tecnologias predominantes de tratamento e disposição final de RSU e alguns mecanismos para implementação da mudança de cenário na Europa. O exemplo suíço é detalhado, mostrando como a cobrança de tarifas impulsiona as ações da população. É preciso reconhecer que o gerenciamento de resíduos sólidos urbanos RSU tem que ser planejado da coleta até o destino final, utilizando e integrando diferentes tecnologias de tratamento, de acordo com as características locais. É relevante para o Brasil a avaliação criteriosa das soluções disponíveis, do ponto de vista técnico e operacional, considerando fortemente a sua aplicabilidade local.

  12. gigapanorama of NA 62 cavern

    CERN Multimedia

    Brice, Maximilien

    2015-01-01

    The image shows the new rare Kaon decay experiment at CERN, called NA62. The NA62 experiment is 270 metres long and includes a 120-metre-long vacuum tank, shown here, housing several of the particle detectors. (Note: the experiment axis is a straight line, the curving of the tank is an optical effect of the photo.) Kaons are particles that decay into lighter elementary particles. The kaon decay processes are mostly well known, except for some very rare decay modes. For example, NA62 is investigating a rare decay predicted by the Standard Model in which a kaon decays into one pion and two neutrinos. This process occurs only once every 10 billion decays. The understanding of such ultra-rare decays are of great importance because they test the Standard Model in energy ranges not accessible by direct measurements. They are therefore complementary to the measurements at the LHC. ultra high definition on demand (photolab@cern.ch).

  13. Criatividade na Gestalt–terapia

    Directory of Open Access Journals (Sweden)

    Patrícia Albuquerque Lima

    2009-04-01

    Full Text Available Como se conceitua criatividade na teoria da Gestalt–terapia? Qual o papel e a função da criatividade nesta abordagem? O que se considera como um comportamento criativo no senso comum é tão diferente do que compreendemos, na abordagem gestáltica, como criatividade? Estas são algumas das perguntas sobre as quais buscaremos transcorrer ao longo deste artigo. Partimos de simples perguntas, pois talvez um bom recurso para se “tratar” da criatividade seja a curiosidade. Para isto, iremos apresentar a contribuição de alguns autores que discorreram sobre o tema da criatividade em suas obras, iniciando por Kurt Goldstein e sua Teoria Organísmica, que consideramos o principal substrato teórico para se pensar a criatividade na Gestalt–terapia.

  14. OGLAŠEVANJE NA FACEBOOKU

    OpenAIRE

    Renko, Katica

    2013-01-01

    V magistrskem delu smo se seznanili z oglaševanjem na Facebooku. S pregledom gradiva, ki nam je ponujeno, smo preverili pogoje, načine, oblike … oglaševanja, ki pa smo jih s pregledom situacije v praksi preverili in dopolnili. Ob zaključku dela lahko rečemo, da je oglaševanje preko FB enostavnejše, cenejše, dostopnejše, omogoča nam ažurnost in samo komunikacijo z naslovniki, ki so potencialni kupci naših ponudb. Množični mediji nam omogočajo mnogotero obliko oglaševanja. Izbrana oblika ponuja...

  15. Possible influences of pacific decadal oscillation in the ten day based radio between actual and potential evapotranspiration in the region of Campinas, São Paulo State, Brazil Possível influência da oscilação decadal do pacífico na razão decendial entre a evapotranspiração real e potencial na região de Campinas (SP, Brasil

    Directory of Open Access Journals (Sweden)

    Gabriel Constantino Blain

    2009-09-01

    Full Text Available Considering the importance of the ratio between the actual and potential evapotranspiration (AE/PE for agricultural purposes, the present study estimated the 10-day based AE/PE, aiming to evaluate possible influences of the Pacific Decadal Oscillation (PDO, on temporal variability series, in the region of Campinas, São Paulo State, Brazil. The shapes of the beta probability density function of the AE/PE series for four periods (two in the cold PDO phase and two in the warm PDO phase do not show differences between the PDO phases. In this sense, the use of "average periods" to obtain a standard climatology for agrometeorological purposes (such as the climate normal of the 1961-1990 period, which encompasses sixteen years of the cold PDO phase and fourteen years of the warm PDO phase should not result in significant errors in the region of Campinas, SP. However, considering academic/scientific purposes, the analyses of the autocorrelation functions of the residual AE/PE series for the four periods show differences in the persistence between the two phases of the PDO.Tendo em vista a importância agrícola da razão entre a evapotranspiração real e potencial (ETR/ETP, estimou-se esta relação (em escala decendial, a fim de verificar possíveis influências da Oscilação Decadal do Pacífico (PDO sobre a variabilidade temporal desse parâmetro agrometeorológico na região de Campinas, Estado de São Paulo, Brasil. Pelas formas da função de densidade de probabilidade Beta das séries de ETR/ETP para quatro períodos (dois na fase fria, e dois na fase quente não se observam diferenças significativas (influência entre as fases da PDO. Nesse aspecto, sob o ponto de vista agrometeorológico, o uso de um determinado "período médio" (tal como a normal climatológica de 1961-1990, que compreende dezesseis anos da fase fria e catorze da fase quente, para caracterização de séries temporais de ETR/ETP, não deve resultar em grandes erros. No

  16. Recomendações em auditoria operacional: uma prospecção de fragilidades, com base na inteligência competitiva RECOMMENDATIONS IN OPERATIONAL AUDITORSHIP: A PROSPECTION OF FRAGILITIES, ON THE BASIS OF COMPETITIVE INTELLIGENCE

    Directory of Open Access Journals (Sweden)

    Alan José de Moura Silva

    2010-08-01

    Full Text Available A sociedade brasileira vem se apercebendo da importância de exigir a utilização responsável dos recursos públicos, postos à disposição de seus representantes eleitos, revertendo-os em benefícios que atendam às necessidades dos cidadãos. Os órgãos de controle externo começam a se preocupar com o atingimento de metas e melhoria de padrões de desempenho das políticas públicas e passam a realizar auditorias de natureza operacional, que buscam avaliar a gestão do ponto de vista da economicidade, eficiência e eficácia, bem como da efetividade das despesas governamentais. Esta pesquisa verificou se era possível identificar fragilidades que comprometessem a eficácia das recomendações emitidas pelas auditorias operacionais realizadas pelo Tribunal de Contas do Estado de PE, a partir do conceito de inteligência competitiva e com vistas a subsidiar uma atuação preventiva e/ou contingencial. Utilizou-se do método dedutivo com pesquisa bibliográfica e documental, com a análise de todas as recomendações das auditorias operacionais realizadas e julgadas pelo TCE/PE de 2003-2007. Concluiu-se, com base na inteligência competitiva, que há fragilidades que podem comprometer a eficácia da implementação das recomendações emitidas pela auditoria operacional, que uma vez identificadas permitirão o estabelecimento de uma estratégia preventiva e uma estratégia contingencial, para fazer face aos fatores de risco, caso se concretizem.The Brazilian company has been aware of the importance of requiring the responsible use of public resources, made available to their elected representatives, reverting them into benefits that meet the needs of citizens. The bodies of external control are beginning to worry about achievement of targets and improvement of the performance of public policy and start to perform audits of an operational nature, seeking to evaluatethe management in terms of economy, efficiency and effectiveness, and the

  17. Law of Iterated Logarithm for NA Sequences with Non-Identical Distributions

    Indian Academy of Sciences (India)

    Guang-Hui Cai; Hang Wu

    2007-05-01

    Based on a law of the iterated logarithm for independent random variables sequences, an iterated logarithm theorem for NA sequences with non-identical distributions is obtained. The proof is based on a Kolmogrov-type exponential inequality.

  18. Primjena svjetlovodne tehnologije na brodovima

    OpenAIRE

    Jurdana, Irena

    2008-01-01

    Svjetlovodna tehnologija je zbog svojih prednosti u prijenosu podataka i jednostavnosti izvedbe nad klasičnim tehnologijama prijenosa informacija u proteklih dva desetljeća potpuno prevladala na području telekomunikacijskih i računalnih mreža. Osim u komunikacijskim sustavima svjetlovodi su se počeli primjenjivati i kao senzori za razne neelektrične i električne veličine. U oba slučaja njihove vrlo male dimenzije, jednostavno instaliranje, neosjetljivost na vanjske elektromagnetske utjecaje, ...

  19. β decay of 32Na

    International Nuclear Information System (INIS)

    The β-decay of 32Na has been studied using β-γ coincidences. New transitions and levels are tentatively placed in the level scheme of 32Mg from an analysis of γ-γ and β-γ-γ coincidences. The observation of the indirect feeding of the 2321 keV state in 32Mg removes some restrictions previously placed on the spin assignment for this state. No evidence of a state at 2117 keV in 32Mg is found. Previously unobserved weak transitions up to 5.4 MeV were recorded but could not be placed in the decay scheme of 32Na

  20. KAZNIVA DEJANJA NA CIVILNIH LETALIH

    OpenAIRE

    Vöröš, Tina

    2014-01-01

    Letalska industrija je ena izmed najhitreje rastočih industrij na svetu in je še kako pomembna v življenju mnogih, ki potujejo. Zaradi prisotnosti terorizma v letalstvu in vseh preteklih napadov na civilna letala, ki so terjali številne žrtve, je varovanje pred dejanji nezakonitega vmešavanja v civilno letalstvo ena izmed glavnih prioritet vseh letališč in letalskih prevoznikov ter nekaterih mednarodnih organizacij. Varnost letala pa znajo ogroziti tudi neposlušni in napadalni potniki, ki iz ...

  1. IMPLEMENTACIJA MULTIMEDIJSKEGA TERMINALA NA FOV

    OpenAIRE

    Ažman, Andrej

    2011-01-01

    Z diplomskim delom smo implementirali tehnološko rešitev Infomat, to je touch screen monitor z aplikacijo, s katero smo izpopolnili in dopolnili obstoječi informacijski sistem na FOV z uporabo drugačne oz. dodatne tehnologije. Študenti in profesorji FOV imajo informacijski sistem, ki je enostaven in ima odgovore na veliko koristnih vprašanj. Z vpeljavo drugačne tehnologije smo uporabnikom omogočili, da dobijo informacije tudi tisti, ki nimajo lastnega računalnika, ter uporabnikom omogočili...

  2. Cistična fibroza

    OpenAIRE

    Tješić-Drinković, Dorian; Tješić-Drinković, Duška

    2015-01-01

    Cistična fibroza je najčešća nasljedna, autosomalno recesivna bolest koja utječe na dužinu života u bijeloj rasi. Danas je prepoznato više stotina mutacija uz veliku varijaciju ekspresije bolesti. Prepoznavanje bolesnika i nosilaca mutacije pruža mogućnost genskog savjetovanja i prevencije bolesti. Rano dijagnosticiranje, sve češće pomoću neonatalog probira, omogućuje rani multidisciplinarni terapijski pristup uz značajno produljenje životnog vijeka i sve većeg broja odraslih bolesnika. Dužin...

  3. Mobbing - zlostavljanje na radnome mjestu

    OpenAIRE

    Šoljan, Ivana; Josipović-Jelić, Željka; Jelić Kiš, Anita

    2008-01-01

    Mobbing odnosno zlostavljanje na radnome mjestu predstavlja neprijateljsku i neetičnu komunikaciju, koja je sustavno usmjerena od jednoga ili više pojedinaca prema, uglavnom, jednom pojedincu, koji je zbog mobbinga gurnut u poziciju u kojoj je bespomoćan ili se ne može obraniti te držan u njoj s pomoću stalnih zlostavljačkih (mobinških) aktivnosti. U članku je obrađeno nekoliko bitnih značajki zlostavljanja: ponašanja karakteristična za zlostavljača, organizacijski uzroci pojave, konflikt u p...

  4. Criatividade na Gestalt–terapia

    OpenAIRE

    Patrícia Albuquerque Lima

    2009-01-01

    Como se conceitua criatividade na teoria da Gestalt–terapia? Qual o papel e a função da criatividade nesta abordagem? O que se considera como um comportamento criativo no senso comum é tão diferente do que compreendemos, na abordagem gestáltica, como criatividade? Estas são algumas das perguntas sobre as quais buscaremos transcorrer ao longo deste artigo. Partimos de simples perguntas, pois talvez um bom recurso para se “tratar” da criatividade seja a curiosidade. Para isto, iremos apresentar...

  5. VPLIV VODJE NA RAZVOJ SODELAVCEV

    OpenAIRE

    Fabjan, Jožica

    2011-01-01

    Razvoj in uspešnost podjetja sta tesno povezana z razvojem vseh, ki v podjetju delajo. Ljudje, ki so opremljeni z ustreznimi znanji, sposobnostmi in veščinami, so strateškega pomena, ter zagotovo eden ključnih dejavnikov konkurenčnosti in uspešnosti sodobnega časa. Odločilno vlogo pri usmerjenem razvoju ljudi v organizaciji, strokovnjaki pripisujejo vodjem na vseh hierarhičnih ravneh organizacijske strukture podjetja. V diplomski nalogi, ki je razdeljena na teoretični in empirični del smo...

  6. 1 nA Beam position monitor

    International Nuclear Information System (INIS)

    A new BPM system, based on resonant cavities, has been developed for measuring the transverse position of very low-intensity electron beams delivered to Experimental Hall B at the Continuous Electron Beam Accelerator Facility (CEBAF) in Newport News. VA. The system requirements called for measuring down to 1 nA with a 100 m m resolution. The actual system is much better: it can measure down to 100 pA at the 100 m m required resolution. A 100 pA beam yields about 1 electron per bunch. Each 1 nA BPM utilizes three resonant RF cavities to determine the position of the beam: one cavity sensitive to X position, a second cavity sensitive to Y position, and a third cavity which measures intensity. The position cavities operate at room temperature in a dipole type mode at 1497 MHz and contain internal field perturbing rods in an arrangement similar to that of the CEBAF rf Separator cavities. The position cavities are electron beam welded assemblies made of copper plated stainless steel. The RF output signal from each cavity is processed using a down-converter and a DSP based commercial lock-in amplifier operating at 100 kHz. The lock-in amplifiers connect to the EPICS control system via an IEEE 488 bus. System features under development include intensity and position modulation measurement capabilities. This paper provides measured performance results and an updated overview of the installed and operational 1 nA BPM system. copyright 1998 American Institute of Physics

  7. Linguagens na TV Languages on tv

    Directory of Open Access Journals (Sweden)

    Glaucia Guimarães

    2008-06-01

    Full Text Available Este artigo aborda questões relativas às estratégias discursivas utilizadas na produção dos textos televisivos. Com base na Análise Crítica de Discurso (ACD, nos termos em que é formulada por Norman Fairclough, o trabalho analisa os modos pelos quais as linguagens (incluindo materiais semióticos diversos são articuladas na/pela TV, sistematiza as relações entre a articulação de linguagens e a produção de efeitos de sentido, bem como os modos de sua inscrição nas tendências discursivas contemporâneas, a saber: democratização, tecnologização e comodificação. A partir das relações entre as práticas de linguagem e as tendências destacadas, o artigo tece considerações sobre as condições de produção de leituras críticas dos textos multimidiáticos, nas suas múltiplas dimensões: dos contextos e mecanismos da produção textual à pluralidade constitutiva de sua recepção.This paper deals with issues related to discursive strategies in the production of TV texts. Based on Critical Discourse Analysis (CDA, as formulated by Norman Fairclough, it analyzes the ways languages (including several semiotic materials are articulated in order to produce a range of wanted meaning effects, as well as the ways they are inscribed in the contemporary discursive trends discussed by the author, namely: democratization, technologization and commodification. Departing from the analysis of language practices and the discursive trends underlined, the paper aims at clarifying the multiple dimensions of multimedia conditions of production, focusing on both the context and the mechanisms and the diverse reception (reading possibilities.

  8. Study of the Na-Na2O-Na2CO3-C system phase diagram

    International Nuclear Information System (INIS)

    The aim of this study is to provide a contribution to the understanding of the sodium-carbon-oxygen ternary system in the sodium rich corner. The basic experimental technique used is differential thermal analysis (DTA) but it has been completed by quenching, X ray and chemical analysis methods. The proposed phases diagram implies that Na-Na2O-Na2CO3-C system is reciprocal ternary system. Temperature of stable pairs reversal is 690 deg. C. The stable pair is Na-Na2CO3 at elevated temperature and Na2O-C at low temperature. (author)

  9. Dialogia do riso: um novo conceito que introduz alegria para a promoção da saúde apoiando-se no diálogo, no riso, na alegria e na arte da palhaçaria Dialogy of Laughter: a new concept introducing joy for health promotion based on dialogue, laughter, joy and the art of the clown

    OpenAIRE

    Marcus Vinicius Campos Matraca; Gert Wimmer; Tania Cremonini de Araújo-Jorge

    2011-01-01

    Apresentamos e debatemos a Dialogia do Riso, um conceito baseado na prática da educação popular em saúde desenvolvida com alegria. Saúde entendida como um recurso para a vida e não como um objetivo de viver; promoção da saúde como uma reação positiva que leva a uma percepção ampliada, integrada, complexa e intersetorial: articula ambiente, educação, pessoas, estilo e qualidade de vida. O riso pode então ser incorporado como ferramenta de promoção da saúde, tese que defendemos. Para isso apres...

  10. Exigências em metionina de leitões de 6 a 11kg com base no conceito da proteína ideal - DOI: 10.4025/actascianimsci.v25i1.2131 Methionine requirements for piglets from 6 to 11kg based on the ideal protein concept - DOI: 10.4025/actascianimsci.v25i1.2131

    Directory of Open Access Journals (Sweden)

    Messias Alves da Trindade Neto

    2003-04-01

    Full Text Available Foram realizados dois experimentos para determinar as exigências de metionina de leitões de 6 a 11kg e sua proporção ideal em relação à lisina, com base no conceito da proteína ideal. Em cada experimento foram usados 72 leitões desmamados aos 21 dias, em um delineamento de blocos ao acaso, com quatro tratamentos e seis repetições. As rações experimentais continham 1,40% de lisina e 0,32%; 0,36%; 0,40% ou 0,43% de metionina totais no experimento I e 1,60% de lisina e 0,36%; 0,42%; 0,48% ou 0,55% de metionina totais no experimento II, fornecidas dos 6 aos 11kg; dos 11 aos 20kg, todos receberam a mesma ração. No experimento I, não foram observadas diferenças significativas (p>0,05 para as variáveis de desempenho (0 a 14 e 0 a 28 dias. Houve efeito quadrático para teor de uréia plasmático (p=0,053, sendo o menor valor observado na relação lisina: metionina de 100: 28,5. No experimento II, houve efeito linear negativo no ganho diário de peso (p=0,029 e efeito quadrático no teor de uréia no plasma (P=0,058 sendo o menor valor observado na relação lisina: metionina de 100: 29,4.Two experiments were conducted to determine the methionine requirement of pigs from 6 to 11kg and its ideal ratio to lysine, based on the ideal protein concept. In each experiment, 72 pigs weaned at 21 days of age were used, in a randomized complete block design, with four treatments and six replicates. The experimental rations contained 1.40% lysine and 0.32; 0.36; 0.40 or 0.43% total methionine in the first experiment; and 1.60% lysine and 0.36; 0.42; 0.48 or 0.55% total methionine in the second experiment, fed from 6 to 11kg; from 11 to 20kg all pigs received the same ration. In experiment I, no differences were observed (P>0.05 for the performance variables (0 to 14 and 0 to 28 days. There was quadratic effect for plasma urea level (P=0.053; the lowest level was found for a total lysine: methionine ratio of 100: 28.5. In experiment II, there was a

  11. Gestão do Conhecimento – GC – como recurso estratégico e fonte de Vantagem Competitiva Sustentável – VCS – na perspectiva Resource-based view – RBV – Knowledge Management – KM – used as a strategic resource and source of Sustainable Competitive Advantage – SCA – in the Resource-based view – RBV –

    Directory of Open Access Journals (Sweden)

    Virginia Aparecida Castro

    2012-06-01

    Full Text Available A Gestão do Conhecimento – GC – busca integrar toda a organização ao conhecimento que pode ser criado, compartilhado e armazenado. Desta forma, este trabalho tem por objetivo evidenciar de que maneira a GC é utilizada como recurso estratégico e fonte de Vantagem Competitiva Sustentável – VCS – na perspectiva Resource based view – RBV –. É feito um levantamento na forma de censo junto aos alunos das turmas de pós-graduação lato sensu (MBA da FAGEN – Faculdade de Gestão e Negócios – da UFU – Universidade Federal de Uberlândia –, os quais atuam no mercado como gestores e possuem pelo menos um subordinado sob a sua liderança. Após uma revisão da literatura sobre GC e VCS estruturou-se o instrumento de pesquisa a partir do Diagnóstico de Gestão do Conhecimento criado por Bukowitz e Williams (2002 e do Framework VRIO proposto por Barney (1991,1995. Ao considerar o critério de desempenho global de 55%, o cálculo da média aponta um percentual de 70%. Porém, a GC é utilizada em um nível preliminar, pois nota-se que os gestores necessitam, além de reconhecerem a importância da GC, trabalharem para a sua efetiva implantação. Assim, a GC, alinhada ao plano estratégico global da empresa, poderá ser utilizada como recurso estratégico e fonte de VCS na perspectiva RBV.The Knowledge Management – KM – searches to integrate organization to the knowledge that can be created, shared and stored. This study aims to show how the KM is used as a strategic resource and source of Sustainable Competitive Advantage – SCA – in the Resource based view – RBV – perspective. We made a survey in the form of census with the students of  Master Business Administration – MBA of FAGEN – Faculdade de Gestão e Negócios – da UFU – Universidade Federal de Uberlândia –. This students are managers and have employees with your leadership. After a review of the literature on KM and SCA, we have structured the

  12. Conhecimento de adultos sobre o papel da atividade física na prevenção e tratamento de diabetes e hipertensão: estudo de base populacional no Sul do Brasil Public knowledge on the role of physical activity in the prevention and treatment of diabetes and hypertension: a population-based study in southern Brazil

    Directory of Open Access Journals (Sweden)

    Alan G. Knuth

    2009-03-01

    Full Text Available O objetivo deste estudo foi avaliar o conhecimento dos adultos de Pelotas, Sul do Brasil, sobre o papel da atividade física na prevenção e tratamento de diabetes e hipertensão arterial, e os fatores associados aos conhecimentos. Foi realizado um estudo transversal de base populacional, com amostragem por conglomerados, incluindo 972 indivíduos de 20 a 69 anos. O conhecimento dos efeitos da atividade física na prevenção e tratamento foi maior para a hipertensão (82% do que para diabetes (47,2%. Para a prevenção de diabetes maiores conhecimentos se associaram ao sexo feminino (RP = 1,16; IC95%: 1,03-1,31, e no tratamento além destes, indivíduos ativos, obesos e de elevado nível econômico, tiveram maior conhecimento. Na prevenção da hipertensão, elevado conhecimento associou-se ao maior nível econômico (RP = 1,23; IC95%: 1,11-1,36. Quanto ao tratamento, mulheres, indivíduos ativos e obesos apresentaram maior conhecimento. Em síntese, o conhecimento sobre o papel da atividade física no tratamento de diabetes e hipertensão é maior, em comparação à prevenção; tal achado merece destaque, pois a capacidade de prevenção da atividade física não parece estar tão bem difundida em termos populacionais.The aim of this study was to evaluate public knowledge on the role of physical activity in the prevention and treatment of diabetes and hypertension, and the factors associated with such knowledge. A population-based cross-sectional study was conducted in Pelotas, southern Brazil, including 972 adults aged 20 to 69 years, selected with a clustering protocol. Knowledge on the preventive and curative benefits of physical activity was higher for hypertension (87.2% than for diabetes (47.2%. Women were more knowledgeable on the role of physical activity in preventing diabetes (PR: 1.16; 95%CI: 1.03-1.31. In terms of treatment, greater knowledge was associated with female gender, current physical activity, obesity, subjects, and

  13. Instrumentação Tecnológica e Realimentação no Processo de Avaliação para o Ensino de Matemática na Universidade: um método baseado na Engenharia Didática Technological Instrumentation and Feedback in the Assessment Process in University-level Mathematics Teaching: a method based on Didactics Engineering

    Directory of Open Access Journals (Sweden)

    Natália Maria Cordeiro Barroso

    2009-12-01

    Full Text Available O uso de ferramentas automatizadas no processo de avaliação impõe mudanças de paradigmas que se devem aos mecanismos usados na elaboração de exercícios e análise de resultados. Propõe-se, neste trabalho, um método de realimentação para o processo de avaliação com o apoio de ferramentas computacionais. Apresenta-se uma aplicação deste método em sala de aula, na qual as atividades propostas aos alunos são fundamentadas em teorias da Didática da Matemática e são elaboradas em um programa de computador que faz o rastreamento das atividades dos estudantes. A partir da análise do comportamento do professor nesta experimentação, onde ficam expostas as suas dificuldades naturais em modificar os seus hábitos de ensino, destaca-se a necessidade de um trabalho de educação em conjunto, envolvendo também a participação de pesquisadores da área de Educação Matemática e de profissionais da área de Informática como suporte ao trabalho do professor. Palavras-chave: Avaliação Automatizada. Avaliação Formativa. Engenharia Didática.With the use of automated tools, a change in paradigms in the student assessment process is necessary. This is due to the different mechanisms used to elaborate assessments and to analyze their results. An assessment method with continuous feedback is proposed. An application of this method is presented in which the activities proposed to the students in the classroom are based on Mathematical Didactic theories. To elaborate and apply this assessment, software was used that tracks the students’activities. Based on analysis of the teacher’s behavior during the experiment, which showed his natural difficulty in modifying his teaching habits, it is emphasized that this type of educational work needs to involve the participation of professionals from the fields of mathematical education and technology to help improve the teacher’s work. Keywords: Automated Evaluation. Formative Evaluation

  14. Effect of Cleaning the Solvent of NaOCl and Second Column of Alumina Addition on Yield and Release 99Mo (Mo Breakthrough) from 99Mo/99mTc Generator Based on PZC (Poly Zirconium Compound)

    International Nuclear Information System (INIS)

    Alumina is one of main material in 99Mo/99mTc generator as molybdenum adsorbent. Limitation of alumina adsorption capacity to molybdenum cause this material cannot be applied as column filler for generator 99Mo/99mTc using 99Mo from neutron activation. The invention of new compound as molybdenum adsorbent, PZC (poly zirconium compound), have been shown that the materials is a promising adsorbent for generator 99Mo/99mTc from (n,γ) irradiated molybdenum. The research of generator 99Mo/99mTc by using adsorbent PZC is form of cooperation between PPR-BATAN Serpong with JAERI and Kaken Co. Japan. In this research, the effects of addition of NaOCl solution to elution yield and 99Mo breakthrough have been done. The other parameter used in this experiment to minimized 99Mo breakthrough in 99mTc is addition of second column alumina placed after 99Mo-PZC column. Adsorption capacity of PZC material to molybdenum determined by heating 99Mo solution with PZC up to 3 hours and the result indicated 1 gram PZC adsorbed 80-95 % 99Mo from the reacted 268 mg molybdenum. Yield percentage of the 99Mo/99mTc generator without rinsed by saline solution obtained less than 50 % and the yield increased more than 80 % after the column washing by using NaOCl 0.5 % or 1 % solutions. Usage of both NaOCl 0.5 % solution and alumina column as second column can prevent of yield stability and minimized 99Mo breakthrough at 99mTc effluent. (author)

  15. Ensinar e aprender na Bíblia

    Directory of Open Access Journals (Sweden)

    Tércio Machado Siqueira

    2011-06-01

    Full Text Available Ensinar e aprender na BíbliaTeaching and learning in the BibleEnseñanza y el aprendizaje de la BibliaRESUMOEste artigo analisa o conceito de ensinar e aprender na Bíblia a partir das expressões hebraicas lamad e yarah, para, posteriormente, discutir a possibilidade de uma pedagogia libertadora e como aplicá-la, tendo como ponto de partida o ensino no Antigo Testamento.ABSTRACTThis article analyzes the concept of teaching and learning in the Bible based on the Hebrew expressions lamad and yarah, to then discuss the possibility of a liberating pedagogy and how to apply it, taking as a starting point teaching in the Old Testament.RESUMENEn este artículo se analiza el concepto de enseñanza y aprendizaje en la Biblia sobre la base de las expresiones hebreas lamad y yarah, para discutir, entonces, la posibilidad de una pedagogía liberadora y cómo aplicarla, tomando como punto de partida la enseñanza en el Antiguo Testamento.

  16. Avaliação do Potencial de Ligantes à Base de Sódio e Cinzas Volantes na Estabilização de Solos – Comparação com Soluções Tradicionais

    OpenAIRE

    Teixeira, Cidália Conceição Rocha

    2010-01-01

    Dissertação de Mestrado em Engenharia Civil As técnicas de melhoramento de solos assumem cada vez mais um papel fundamental na resolução de problemas relacionados com os solos de fundação. Por um lado, a indisponibilidade de solo com as capacidades necessárias no local da obra, e por outro, o custo financeiro e ambiental da substituição deste por outro com características mais adequadas, levam a que a opção pelo melhoramento do solo original seja cada vez mais equacionada, o que se reflect...

  17. Supramolecular assembly based on a heteropolyanion: Synthesis and crystal structure of Na3(H2O)6[Al(OH)6Mo6O18]$\\cdot$2H2O

    Indian Academy of Sciences (India)

    Vaddypally Shivaiah; Samar K Das

    2005-05-01

    Synthesis and structural characterization of a polyoxometalate compound Na3(H2O)6 [Al(OH)6Mo6O18]$\\cdot$2H2O (1) have been described. Compound 1 exhibits three-dimensional network structure in the solid state, which is assembled by Anderson-type heteropolyanions, [Al(OH)6Mo6O18]$_n^{3n-}$, as building blocks sharing sodium cations. 1 possesses ``sinuous" channels occupied by supramolecular water dimers as guests. Anderson anions, sodium-coordinated water and crystal water are additionally involved in an intricate hydrogen-bonding network in the crystal of 1.

  18. Corrosion behavior of Mg–5Al based magnesium alloy with 1 wt.% Sn, Mn and Zn additions in 3.5 wt.% NaCl solution

    Directory of Open Access Journals (Sweden)

    Nguyen Dang Nam

    2014-06-01

    Full Text Available The corrosion properties of four Mg–5Al alloys with M-alloying elements (tin, manganese and zinc in a 3.5 wt.% NaCl solution were examined using electrochemical tests and surface analyses. The electrochemical results indicated that the addition of 1 wt.% M metal decreased the corrosion rate and hydrogen evolution rate of the Mg–5Al specimens. Moreover, the addition of 1Zn resulted in having the best corrosion resistance due to the interaction of Zn oxide with Mg and Al oxides which acted as a corrosion barrier.

  19. Os Processos Verbais Presentes nos Artigos Científicos da Revista Gestão e Secretariado: Uma Análise com Base na Linguística Sistêmico-Funcional

    Directory of Open Access Journals (Sweden)

    Keyla Christina Almeida Portela

    2014-06-01

    Full Text Available RESUMO: Este trabalho está inserido no Projeto SAL (Systemics across Languages que tem por objetivo apoiar pesquisas linguísticas que investigam a relação entre gramática e discurso em termos sistêmico-funcionais. O trabalho tem como objetivo analisar os processos verbais em 23 artigos científicos da revista Gestão e Secretariado, publicados online. Os processos verbais quando empregados, ratificam, esclarecem e explicam fatos ou situações, desempenhando um papel imprescindível na sustentação dos argumentos apresentados por autores frente à temática do texto. Como fundamentação teórica será utilizada a Linguística Sistêmico-Funcional (LSF, que estuda a língua em uso em diferentes contextos, desenvolvida por M.A.K Halliday (1985, 1994 e revista por Halliday e Matthiessen e outros. A pesquisa basearse-á na metafunção ideacional da Linguística Sistêmico-Funcional – que compreende a língua como atividade social, avaliando seus contextos de uso (HALLIDAY,1994 e HALLIDAY & MATTHIESSEN, 2004. No que se refere aos estudos sobre gêneros científicos, a pesquisa estará fundamentada em Bhatia (1993, Swales (1989, 1990, Swales & Feak (1999, Motta-Roth (1995, 2006 e outros. O gênero artigo científico é um gênero que serve como uma via de comunicação entre pesquisador, profissionais, professores e alunos de graduação e pós-graduação. Na análise dos dados, será observada a frequência dos processos do dizer e a sua relação com os participantes da oração (dizente e verbiagem. A metodologia utilizada será subsidiada pelo programa de Linguística de Corpus Wordsmith Tools 5.0 (Scott, 2009, mais especificamente as ferramentas wordList e concordance. Esta pesquisa pretende auxiliar o melhor entendimento de como os autores que publicam na revista Gestão e Secretariado utilizam dos processos do dizer.

  20. Avaliação de adesivos à base de taninos de Pinus caribaea var. bahamensis e de Acacia mearnsii na fabricação de painéis aglomerados

    OpenAIRE

    Amélia Guimarães Carvalho; Roberto Carlos Costa Lelis; Alexandre Miguel do Nascimento

    2014-01-01

    http://dx.doi.org/10.5902/1980509814588Este trabalho teve por objetivo avaliar os métodos para a extração dos taninos da casca do Pinus caribaea var. bahamensis, assim como verificar a viabilidade técnica de utilização dos taninos da casca de Pinus caribaea var. bahamensis, de Acacia mearnsii, de misturas de taninos de acácia negra e pinus e de misturas do adesivo ureia-formaldeído (UF) com taninos de acácia e pinus na produção de adesivos para aglomerados. As cascas de Pinus caribaea var. ba...

  1. System Na3VO4-Na4V2O7-Na2WO4

    International Nuclear Information System (INIS)

    State diagrams of sodium-orthovanadate-sodium tungstate, sodium pyrovanadatesodium tungstate systems and crystallization surface of sodiumorthovanadate-sodium pyrovanadate-sodium tungstate system were studied. Na5VWO8 compound forms in sodium orthovanadate-sodium tungstate system in solid state. Congruently melting Na6V2WO11 compound forms in sodium pyrovanadate-sodium tungstate system. Liquidus diagram of sodium orthovanadate-sodium pyrovanadate-sodium tungstate system was constructed. Compositions and melting points of ternary eutectic points were determined. 4 refs.; 3 figs.; 3 tabs

  2. Glavni karakteristiki na igraornite podracja

    OpenAIRE

    Janevski, Vladimir

    2010-01-01

    koga stanuva zbor za igraornite podracja vo taa smisla se misli i na etnografskite karakteristiki vo Makedonija. Vo Makedonija postojat pet igraorni podracja i toa: Zapadnoto igraorno podracje, Jugozapadnoto igraorno podracje, juznoto igraorno podracje, Istocnoto igraorno podracje i severnoto igraorno podracje.

  3. NA49: lead ion collision

    CERN Multimedia

    1995-01-01

    This is an image of an actual lead ion collision taken from tracking detectors on the NA49 experiment, part of the heavy ion project at CERN. These collisions produce a very complicated array of hadrons as the heavy ions break up. It is hoped that one of these collisions will eventually create a new state of matter known as quark-gluon plasma.

  4. NA49: lead ion collision

    CERN Multimedia

    1995-01-01

    This is an image of an actual lead ion collision taken from the NA49 experiment, part of the heavy ion project at CERN. These collisions produce a very complicated array of hadrons as the heavy ions break up. It is hoped that one of these collisions will eventually create a new state of matter known as the quark-gluon plasma.

  5. NA60 frees the quarks

    CERN Multimedia

    2003-01-01

    Fitted with new state-of-the-art silicon detectors, NA60 is prepared to study the phase transition from confined hadronic matter to a deconfined (free) quark-gluon plasma, a state of matter which probably existed an instant after the Big Bang.

  6. VPLIV VODENJA NA ZAUPANJE ZAPOSLENIH

    OpenAIRE

    Polajšer, Jolanda

    2015-01-01

    Zaupanje je osnovni in izjemno pomembni dejavnik dobrega sodelovanja. Diplomsko delo izpostavi pomen zaupanja za delovanje moderne organizacije. V diplomskem delu tudi ugotavljamo, kakšen vpliv ima lahko stil vodenja na prisotnost zaupanja podrejenih v nadrejene. Ugotovili smo, da obstaja pomembna korelacija med vodenjem in stopnjo zaupanja.

  7. NA62: Hidden Sector Physics

    CERN Document Server

    Cesarotti, Carissa Joyce

    2016-01-01

    Modern experimental physics is often probing for new physics by either finding deviations from predictions on extremely precise measurements, or by looking for a new signal that cannot be explained with existing models. The NA62 experiment at CERN does the former by measuring the ultra-rare decay $K^+ \\rightarrow \\pi^+ \

  8. DEJAVNIKI, KI VPLIVAJO NA ZVESTOBO KUPCA

    OpenAIRE

    Begelj, Nina

    2014-01-01

    V diplomski nalogi smo raziskali kateri dejavniki kakovosti storitev so pomembni za kupčevo zvestobo. Dejavnike smo določili na podlagi pregleda teoretičnih osnov in jih vključili v spletno anketo, na katero je odgovorilo 158 anketirancev. Na podlagi analiz smo ugotovili pomembnost dejavnikov in medsebojne povezave med dejavniki kakovosti in dejavniki zvestobe. Rezultati ankete kažejo na veliko pomembnost dejavnikov, ki se nanašajo na vedenje in urejenost zaposlenih, ter na cenovno stabiln...

  9. Assistência de enfermagem a um paciente infartado portador de HIV, baseada na teoria do autocuidado: estudo de caso La asistencia de enfermería a un paciente infartado portador de vih, basado en la teoría del autocuidado: estudio de caso The nursing assistance to patient myocardio infarction with hiv, based on the theory of to be careful: case study

    OpenAIRE

    Gabriela Silvestre de Lima; Tatiana de Medeiros Colletti Cavalcante; Adriana Paula Jordão Isabella; Adriana da Silva Magalhães

    2007-01-01

    OBJETIVO: Aplicar a Sistematização da Assistência de Enfermagem (SAE) a um paciente portador de HIV e infartado. MÉTODOS: Trata-se de um estudo de caso realizado em um hospital escola localizado na região metropolitana de São Paulo, em novembro de 2003, utilizando a Sistematização da Assistência de Enfermagem e propondo diagnósticos de enfermagem com base na taxonomia II NANDA bem como as intervenções de enfermagem relacionadas. RESULTADOS: Os principais diagnósticos de enfermagem identificad...

  10. Na+,K+-ATPase Na+ affinity in rat skeletal muscle fiber types

    DEFF Research Database (Denmark)

    Kristensen, Michael; Juel, Carsten

    2010-01-01

    Previous studies in expression systems have found different ion activation of the Na(+)/K(+)-ATPase isozymes, which suggest that different muscles have different ion affinities. The rate of ATP hydrolysis was used to quantify Na(+),K(+)-ATPase activity, and the Na(+) affinity of Na(+),K(+)-ATPase......Previous studies in expression systems have found different ion activation of the Na(+)/K(+)-ATPase isozymes, which suggest that different muscles have different ion affinities. The rate of ATP hydrolysis was used to quantify Na(+),K(+)-ATPase activity, and the Na(+) affinity of Na...

  11. GUANTÁNAMO NA SUPREMA CORTE DOS ESTADOS UNIDOS

    Directory of Open Access Journals (Sweden)

    Ana Luisa Zago de Moraes

    2011-04-01

    Full Text Available Após os atentados de 11 de setembro de 2001, o governo norte-americano iniciou  uma“guerra ao terrorismo”, sendo uma das medidas o aprisionamento de supostos terroristas  na Base Naval de Guantánamo, em Cuba, vedando aos detentos o acesso aos tribunais americanos e quaisquer direitos e os tratando como inimigos. Em resposta a essa situação, bem como aos atos normativos que regem o encarceramento, (não processamento e tratamento na prisão, a Suprema Corte Americana, durante o governo de George W. Bush, proferiu três decisões nos casos de terroristas presos nestas circunstâncias. Na primeira, concluiu que o Habeas Corpus é garantia que se estende a qualquer indivíduo; na segunda, invocou o direito internacional dos direitos humanos e salientou que todos os seres humanos são titulares de algum tipo de proteção com base apenas em sua própria humanidade; por fim, na última, afastou novas normas que excluíam a garantia de  Habeas Corpus e conclui que juntas militares não constituem um mecanismo justo para evitar a prisão de inocentes.

  12. Szkolne możliwości dodatkowego rozwoju ucznia - na przykładzie sprawności układu oddechowego = School additional opportunities for development of the student - based of the example of the respiratory system efficiency

    OpenAIRE

    Pujszo, Małgorzata; Drumińska, Ewelina; Wilczyńska, Sylwia; Zając, Magdalena; Stępniak, Robert

    2015-01-01

    Pujszo Małgorzata, Drumińska Ewelina, Wilczyńska Sylwia, Zając Magdalena, Stępniak Robert. Szkolne możliwości dodatkowego rozwoju ucznia - na przykładzie sprawności układu oddechowego = School additional opportunities for development of the student - based of the example of the respiratory system efficiency. Journal of Education, Health and Sport. 2015;5(12):424-433. ISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.35570 http://ojs.ukw.edu.pl/index.php/johs/article/view/2015%3B5%2812%...

  13. A construção de tecnologias de atenção em saúde com base na promoção da saúde La construción de tecnologías en salud basadas en la promoción de la salud Building health care technologies based on health promotion

    Directory of Open Access Journals (Sweden)

    Anna Maria Chiesa

    2009-12-01

    Full Text Available Este artigo de reflexão discute as bases teórico-metodológicas da Promoção da Saúde e seu potencial na construção de tecnologias de caráter emancipatório, bem como a complexidade de pesquisas de avaliação de ações nesse campo. Para tanto, descreve e analisa um projeto de promoção de desenvolvimento infantil, construído segundo as bases da Promoção da Saúde na vertente crítica e implementado por equipes de saúde da família em regiões prioritárias no município de São Paulo, e pesquisas de avaliação de suas tecnologias e estratégias de implantação. Conclui que o referencial da Promoção da Saúde contribuiu para reorientação das ações dos profissionais para a atenção integral e fortalecimento dos potenciais de saúde das crianças e famílias e que as pesquisas de avaliação de ações no campo da Promoção demandam instrumentos e abordagens múltiplos, que possibilitem abranger a complexidade de processos e resultados das ações.El artículo discute la contribución de las bases teóricas y metodológicas de la promoción de la salud y tecnologías hacia la emancipación del sujeto. También plantea la complejidad de investigaciones para evaluar las acciones en este campo. Se describió y analizó un proyecto para de promoción del desarrollo infantil elaborado con base en los principios de la promoción de la salud en su vertiente crítica. El proyecto se desarrolló en regiones prioritarias de la ciudad de São Paulo a cargo de equipos de salud de la familia. Las investigaciones relativas a este proyecto evaluaron las tecnologías y estrategias de implementación. Se concluyó que la adopción de los principios de la promoción de la salud ha contribuido en la reorientación de las prácticas de los profesionales sanitarios con vistas a la atención integral y el fortalecimiento de salud de los niños y sus familias. Las investigaciones para evaluar las acciones a nivel de la promoción de la salud

  14. UV-Enhanced NaClO Oxidation of Nitric Oxide from Simulated Flue Gas

    Directory of Open Access Journals (Sweden)

    Shao-long Yang

    2016-01-01

    Full Text Available A wet de-NOx technique based on an UV-enhanced NaClO oxidation process was investigated for simulated flue gas of a diesel engine using a bench-scale reaction chamber. The effects of UV irradiation time, initial pH value, and available chlorine concentration of NaClO solution were studied, respectively. The results showed that when the UV irradiation time was 17.5 min and the initial pH value of NaClO solution was 6, NO removal efficiency of UV/NaClO solution was increased by 19.6% compared with that of NaClO solution. Meanwhile, when the available chlorine concentration of NaClO solution decreased from 0.1 wt% to 0.05 wt%, the enhancement in NO removal efficiency of UV/NaClO solution increased from 19.6% to 24%, compared with that of NaClO solution. The reaction pathways of NaClO solution photolysis and NO removal by UV/NaClO process were preliminarily discussed. The results suggested that HOCl might be the most active species that released many UV-induced photooxidants through photolysis reactions, which played an important role in NO removal process.

  15. Saúde na escola...Saúde na comunidade

    OpenAIRE

    Nunes, Carlos Manuel Domingues Rocha

    2011-01-01

    Este relatório tem como foco de estudo, um conjunto de actividades implementadas em contexto escolar e direcciona o projecto de intervenção na comunidade para as acções relacionadas com a promoção da higiene oral e corporal nos alunos a frequentar o 1º ano do 1º ciclo do ensino básico e jardins-de-infância do Agrupamento de Escolas de Gondomar. O trabalho desenvolvido tem como sustentáculo o estágio de intervenção na comunidade realizado durante a frequência do Curso de Pós-Licenciatura de...

  16. Eventos adversos e segurança na assistência de enfermagem

    OpenAIRE

    Sabrina da Costa Machado Duarte; Marluci Andrade Conceição Stipp; Marcelle Miranda da Silva; Francimar Tinoco de Oliveira

    2015-01-01

    Objetivo: identificar as publicações científicas sobre os eventos adversos na assistência de enfermagem em pacientes adultos hospitalizados e discutir os principais eventos adversos na assistência de enfermagem. Método: Revisão integrativa com abordagem qualitativa. Os dados foram coletados nas bases LILACS, MEDLINE, BDENF e na biblioteca SCIELO, e submetidos à análise temática. Resultados: emergiram três categorias: eventos adversos na assistência de enfermagem; principais causas dos eventos...

  17. Na3DyCl6

    Directory of Open Access Journals (Sweden)

    Christian M. Schurz

    2011-05-01

    Full Text Available Single crystals of the title compound, trisodium hexachloridodysprosate, Na3DyCl6, were obtained as a by-product of synthesis using dysprosium(III chloride and sodium chloride among others. The monoclinic structure with its typical β angle close to 90° [90.823 (4°] is isotypic with the mineral cryolite (Na3AlF6 and the high-temperature structure of the Na3MCl6 series, with M = Eu–Lu, Y and Sc. The isolated, almost perfect [DyCl6]3− octahedra are interconnected via two crystallographically different Na+ cations: while one Na+ resides on centres of symmetry (as well as Dy3+ and also builds almost perfect, isolated [NaCl6]5− octahedra, the other Na+ is surrounded by seven chloride anions forming a distorted [NaCl7]6− trigonal prism with just one cap as close secondary contact.

  18. VPLIV NACIONALNE KULTURE NA ODVIJANJE POGAJANJ

    OpenAIRE

    Borko, Vanja

    2014-01-01

    Vse več podjetij posluje na mednarodnih trgih, kjer se srečujejo s tujimi kulturami. Vzpostavitev poslovnega odnosa v tuji državi zahteva prilagojeno komunikacijo. Pogajanje je vrsta poslovne komunikacije, s katero želimo doseči dogovor. V diplomskem projektu smo ponazorili vpliv kulturnih razlik na odvijanje pogajanj. Projekt je razdeljen na pet poglavij. V uvodu predstavljamo glavni problem pogajanj, ki je nezadostna priprava na pogajanje in nerazumevanje medkulturnih razlik. Naslednje pogl...

  19. Ishara na uashiriaji kama nyenzo ya mtindo, maana na kiwakilishi cha itikadi katika riwaya ya Nyuso za Mwanamke

    OpenAIRE

    Wanyonyi, Mukhata Chrispinus

    2016-01-01

    Makala haya yanachanganua ishara na uashiriaji kama mbinu ya kimtindo ya kuwasilisha maana na kukuza uhusika na maudhui katika riwaya ya Nyuso za Mwanamke (2010) ya Said Ahmed Mohamed. Nimechanganua aina tatu za ishara ambazo ni ishara bia, ishara za kaida na ishara za kifasihi kama zinavyoainishwa na Frye na wenzake (1985). Lengo kuu ni kuchanganua na kubainisha jinsi ishara zinavyowasilisha maana na itikadi za jamii katika matini husika. Ishara hizi pia husaidia kukuza maudhui, ploti na kuo...

  20. Sodium Chloride, NaCl/{\\epsilon} : New Force Field

    OpenAIRE

    Fuentes-Azcatl, Raul; Barbosa, Marcia C.

    2015-01-01

    A new computational model for Sodium Chloride, the NaCl/{\\epsilon}, is proposed. The Force Fields employed here for the description of the NaCl is based on a set of radial particle-particle pair potentials involving Lennard-Jones (LJ) and Coulombic forces. The parameterization is obtained fitting the density of the crystal and the density and the dielectric constant of the mixture of salt with water at diluted solution. Our model shows good agreement with the experimental values for the densi...

  1. Na+ Recirculation and Isosmotic Transport

    DEFF Research Database (Denmark)

    Larsen, Erik Hviid; Møbjerg, N

    2006-01-01

    The Na(+) recirculation theory for solute-coupled fluid absorption is an expansion of the local osmosis concept introduced by Curran and analyzed by Diamond & Bossert. Based on studies on small intestine the theory assumes that the observed recirculation of Na(+) serves regulation of the osmolarity...... permeability in proximal tubule of AQP1 (-/-) mice, and the inverse relationship between hydraulic permeability and the concentration difference needed to reverse transepithelial water flow. The model reproduces the volume responses of cells and lateral intercellular space (lis) following replacement of...

  2. NA50 quark-gluon plasma experiment

    CERN Multimedia

    1997-01-01

    View of the NA50 detector, which studies quark-gluon plasma. The picture shows one of the six hodoscopes, made of 48 scintillator counters, used in the muon trigger of the NA50 spectrometer. The picture shows one of the six hodoscopes, made of 48 scintillator counters, used in the muon trigger of the NA50 spectrometer

  3. Ensino de geometria descritiva: inovando na metodologia

    Directory of Open Access Journals (Sweden)

    Regina Coeli Moraes Kopke

    2001-03-01

    Full Text Available Com base na observação, durante anos de magistério superior, na área de desenho, dos alunos de Engenharia, Matemática, Arquitetura e Artes, quanto às dificuldades encontradas por eles no aprendizado de desenho, em especial da Geometria Descritiva, é que nos propusemos, em 1999, lecionar essa disciplina para os cursos de Arquitetura e Artes, adotando uma metodologia diferente da convencional, para despertar, no aluno, o gosto pela disciplina e o desenvolvimento de uma habilidade pouco trabalhada na escola: a visão espacial. Mostrar para os alunos que essa disciplina não é difícil, mas apenas diferente daquilo que estudaram até então, tornou-se nossa meta. A visão espacial é uma habilidade mental localizada no lado direito do cérebro e, assim, quanto mais lúdica for esta aprendizagem, será mais bem assimilada. A proposta é iniciada no sentido de se trabalhar primeiro com sólidos: neles estarão os pontos, retas e planos normalmente abordados na metodologia convencional, nessa ordem. Como conclusão, tem-se que o importante é ressaltar o grande avanço que a Geometria Descritiva traz para quem quer representar graficamente qualquer coisa. Onde há planejamento, projeto e representação gráfica, aí estará a Geometria Descritiva.During many years observing the teaching of design at the Engineering, Mathematics, Architeture and Arts courses, we can note the difficulties of the students to learn it, specially the descriptive geometry. Because of that, we decided to teach this discipline to the Architeture and Arts courses, using a new metodology to make the students motivated to study and to learn, and trying to develop their their spatial vision. We want to show to the students that this discipline is not so difficult as they think, but show them that is only different. The spatial vision is a mental skill found at the right side of the brain and the more soft the learning is, the more it is assimilated by the brain. The

  4. Effect of carbamide peroxide-based bleaching agents containing fluoride or calcium on tensile strength of human enamel Efeito de agentes clareadores à base de peróxido de carbamida contendo fluoreto e cálcio na resistência à tração do esmalte humano

    Directory of Open Access Journals (Sweden)

    Marcelo Giannini

    2006-04-01

    Full Text Available OBJECTIVE: The aim of this study was to evaluate the effects of carbamide peroxide-based bleaching agents (CPG containing fluoride (CF or calcium (CCa on the ultimate tensile strength of enamel (UTS. METHOD: A "cube-like" resin composite structure was built-up on the occlusal surface of twenty-two sound third molars to facilitate specimen preparation for the micro-tensile test. The restored teeth were serially sectioned in buccal-lingual direction in slices with approximate 0.7 mm thickness. Each slice was trimmed with a fine diamond bur to reduce the buccal, internal slope enamel of the cusps to a dumb-bell shape with a cross-sectional area at the "neck" of less than 0.5 mm². The samples were randomly divided into 12 groups (n=11. The control groups were not submitted to the bleaching regimen. Specimens were treated with 10% CPG gel or with 10% CPG formulations containing CF (0.2% and 0.5% or CCa (0.05% and 0.2%. Bleached groups received the application of the 10% CPGs for 6 hours/day at 37º C, during 14 consecutive days and were stored in artificial saliva (AS or 100% relative humidity (RH among each application. After bleaching, specimens were tested with the microtensile method at 0.5 mm/min. Data were analyzed by two-way ANOVA and Tukey test (5%. RESULTS: No significant difference was observed between groups stored in AS or RH. Specimens treated with CF or CCa presented similar UTS as unbleached control groups. CONCLUSION: Either 10% CPG formulations containing CF or CCa can preserve the UTS after bleaching regimen.OBJETIVO: O propósito deste estudo foi avaliar os efeitos de agents clareadores à base de peróxido de carbamida (CPG contendo fluoreto (CF e cálcio (CCa na resistência à tração do esmalte (UTS. MÉTODO: Um bloco de resina composta foi confeccionada na superfície oclusal de vinte e dois terceiros molars hígidos para facilitar a preparação dos espécimes para o teste de micro-tração. Os dentes restaurados foram

  5. Proposta de Implementação do Custeio Baseado em Atividades na Gestão de Serviços Odontológicos = Implementation proposal of activity-based costing in the management of dental services

    OpenAIRE

    Karyn de Castro Serratine; Fabiano Maury Raupp

    2013-01-01

    O artigo tem por objetivo estruturar uma proposta de implementação do custeio baseado em atividades na gestão de serviços odontológicos. Foi realizada uma pesquisa descritiva, por meio de um estudo de caso, com abordagem predominantemente qualitativa. O estudo inicia com uma incursão teórica nos fundamentos que sustentam o estudo empírico, abordando a importância da gestão estratégica de custos, o custeio baseado em atividades – ABC e a utilização do ABC em empresas de saúde. Após, são aprese...

  6. Algoritmo de um teste adaptativo informatizado com base na teoria da resposta ao item para a estimação da usabilidade de sites de e-commerce

    Directory of Open Access Journals (Sweden)

    Fernando de Jesus Moreira Junior

    2013-09-01

    Full Text Available O presente artigo propõe um algoritmo de um teste adaptativo informatizado baseado na teoria da resposta ao item, desenvolvido para estimar o grau de usabilidade de sites de e-commerce. Cinco algoritmos baseados no critério da máxima informação foram desenvolvidos e testados via simulação. O algoritmo com o melhor desempenho foi aplicado nos dados reais de 361 sites de e-commerce. Os resultados mostraram que o algoritmo desenvolvido consegue obter uma boa estimativa para o grau de usabilidade de sites de e-commerce com a aplicação de 13 itens.

  7. Discurso e prática religiosa nas Comunidades Eclesiais de Base italianas e brasileiras: um estudo comparativo com base na teoria da mudança social de Max Weber (Speech and religious practice in the Basic Ecclesial Communities in Italy and Brazil

    Directory of Open Access Journals (Sweden)

    Marinete Luzia Francisca de Souza

    2011-12-01

    Full Text Available Este estudo é uma reflexão sobre  o discurso e a prática nas comunidades Eclesiais de Base no Brasil e na Itália. Buscamos demonstrar, a partir de uma pesquisa empírica e teórica, as relações entres duas Comunidades Eclesiais de Base, a Comunidade San Paolo (Roma-IT e a Prelazia de São Félix (Mato Gross-BR, demonstrando que estas baseiam-se em dois elementos: resultam das discussões  advindas do Concílio Vaticano II e estão fortemente ligadas a seus líderes. E, ainda, que tais comunidades ligam-se por fortes laços simbólicos. Este fato permitiu-nos concluir  que a Teologia da Libertação empenhou-se em promover mudanças sociais e em criar um corpo simbólico que a corroborasse. Tais análises foram sustentadas pela teoria da transformação social de Max Weber e, ainda, pelos estudos  de Karl Mannheim e de  Glock e Stark. Palavras-chaves:Transformação social, Teologia da Libertação, prática, discurso. Abstract This study is a reflection of the discourse and practice on the Basic Ecclesial communities in Brazil and Italy. We try to show, from an empirical and theoretical research, the relations between two Christian Base Communities: the San Paolo Community (Rome – IT and the Prelature of São Félix (BR – Mato Grosso, based on two factors: the result of discussions arising out of Vatican II, and the strong link to its leaders. Such communities bind by strong symbolic ties that really allowed us to conclude that Liberation Theology endeavored to promote social changes and to create a symbolic body that corroborates it. Such analysis was supported by the theory of social transformation of Max Weber, by the studies of Karl Mannheim and Glock and Stark. Keywords: Social Transformation; Liberation Theology, Practice, Discourse.

  8. Construção e reconstrução de um sistema hipermídia sobre anticorpos monoclonais com base na estrutura cognitiva do especialista de conteúdo Building and rebuilding of a hipermidia system based on the teaching/specialist content's cognitive structure: a case study on monoclonal antibodies system

    Directory of Open Access Journals (Sweden)

    Miriam Struchiner

    2006-12-01

    Full Text Available Relata-se o desenvolvimento do sistema hipermídia Anticorpos Monoclonais, com desenho baseado no conhecimento estrutural de um especialista de conteúdo. A primeira versão do sistema, construída com "organizadores gráficos" para apoiar os alunos na visualização e compreensão do conteúdo, foi avaliada por 42 estudantes de Biologia. Os resultados foram positivos, porém 11 alunos mencionaram dificuldades em localizar conceitos importantes. Em conseqüência, tanto a estrutura como a interface foram modificadas em uma segunda versão, utilizando-se um mapa conceitual (Novak e Gowin, 1984 para a apresentação da interface gráfica. Esta versão foi avaliada por outro grupo de 24 alunos nas mesmas condições que a primeira turma, obtendo-se resultados positivos em relação à organização e orientação dos alunos no uso sistema. Os resultados sugerem que os mapas conceituais contribuem positivamente para a representação do conhecimento de um especialista e também para auxiliar a busca e consulta de informações em sistemas hipermídia.We report the development of the Monoclonal Antibodies Hypermedia System, aimed at Biosciences undergraduate students. The method used for defining the hypermedia structure and the interface was based on the content specialist structural knowledge. The system first version presented a graphic interface based on a "graphic organizer" to support students navigation and comprehention. Forty two Biology students used the hypermedia as part of the Imunology course activities. Although the hypermedia system was positively evaluated by the students., 11 students reported difficulties in finding information in the hypertext structure. Based on results, the system structure and interface were redesigned. The second version was based on "concept map" (Novak & Gowin, 1994. This version was evaluated by another group of 24 Biology students, presenting positive findings about their orientation and navigation. The

  9. Effect of Ta2O5 and Nb2O5 Dopants on the Stable Dielectric Properties of BaTiO3–(Bi0.5Na0.5TiO3-Based Materials

    Directory of Open Access Journals (Sweden)

    Sea-Fue Wang

    2015-11-01

    Full Text Available In this study, BaTiO3–(Bi0.5Na0.5TiO3 ceramics with various amounts of Ta2O5 dopant were investigated for their ability to enhance high-temperature stability to meet X9R specifications. The results were compared to those for ceramics with the common Nb2O5 additive. The best composition appeared to be 0.9BaTiO3–0.1(Bi0.5Na0.5TiO3 with 2 mol% Ta2O5 dopant sintered at 1215 °C, which had a dielectric constant of 1386, a tanδ value of 1.8%, temperature coefficients of capacitance (TCCs of −1.3% and 1.2%, and electrical resistivities of 2.8 × 1012 and 1.5 × 1010 Ω·cm at 25 °C and 200 °C, respectively. Its microstructure consisted of fine equiaxed grains with a perovskite structure and an average grain size of 0.46 μm and some rod-like grains of second-phase Ba6Ti17O40 with a size of approximately 3.2 μm. The Ta2O5 dopant caused a reduction in the grain size and a slight increase in trapped pores. The temperature dependence of the dielectric constant flattened and the Curie point was dramatically suppressed with the addition of Ta2O5 dopant, leading to smooth dielectric temperature characteristics over a relatively broad temperature range. The X9R formulations and their dielectric properties were highly repeatable in this study.

  10. Application of the Na+ recirculation theory to ion coupled water transport in low- and high resistance osmoregulatory epithelia

    DEFF Research Database (Denmark)

    Larsen, Erik Hviid; Møbjerg, Nadja; Nielsen, Robert

    2007-01-01

    The theory of Na+ recirculation for isosmotic fluid absorption follows logically from Hertz's convection-diffusion equation applied to the exit of water and solutes from the lateral intercellular space. Experimental evidence is discussed indicating Na+ recirculation based upon the following...... net Na+ absorption demonstrating an efficiency that is lower than the 18 Na+ per O2 consumed given by the stoichiometry of the Na+/K+-pump. Mathematical modeling predicts a significant range of observations such as isosmotic transport, hyposmotic transport, solvent drag, anomalous solvent drag, the...

  11. Sodium Chloride, NaCl/ϵ: New Force Field.

    Science.gov (United States)

    Fuentes-Azcatl, Raúl; Barbosa, Marcia C

    2016-03-10

    A new computational model for sodium chloride, the NaCl/ϵ, is proposed. The force field employed for the description of the NaCl is based on a set of radial particle-particle pair potentials involving Lennard-Jones (LJ) and Coulombic forces. The parametrization is obtained by fitting the density of the crystal and the density and the dielectric constant of the mixture of the salt with water at a diluted solution. Our model shows good agreement with the experimental values for the density and for the surface tension of the pure system, and for the density, the viscosity, the diffusion, and the dielectric constant for the mixture with water at various molal concentrations. The NaCl/ϵ together with the water TIP4P/ϵ models provide a good approximation for studying electrolyte solutions. PMID:26890321

  12. Thermodynamic Phase And Chemical Equilibrium At 0-110 C For The H+-K+-Na+-Cl--H2O System Up To 16 Molal And The HNO3-H2O System Up To 20 Molal Using An Association-Based Pitzer Model Compatible With ASPEN Plus

    Energy Technology Data Exchange (ETDEWEB)

    Nichols,T.T.; Taylor,D.D.

    2003-09-26

    A status is presented of the parameterization during FY2003 of an association-based Pitzer model to simulate chemical and phase equilibria of acid-chloride-nitrate-mercury aqueous electrolyte systems at 0-100 C within the industry-standard process simulator, ASPEN Plus. Compatibility with ASPEN Plus requires that the Pitzer model used be limited to the third virial coefficient and have the values of b and a1 as originally proposed by Pitzer. Two aqueous models for 0-110 C at atmospheric pressure were parameterized in FY03. The model for the aqueous H+-K+-Na+-Cl- system is applicable for 0-16 molal, and the HNO3-H2O for 0-20 molal. An association-based Pitzer activity coefficient model is combined with Henry's law to predict activity/osmotic coefficient and VLE. The chloride model also predicts KCl and NaCl solubility, while the nitric acid model has the unique capability of predicting extent of dissociation with an average absolute deviation of 1.43%. The association-based approach presented here extends the utility of the molality-based Pitzer model past 6 molal to predict activity/osmotic coefficients up to 16-20 molal. The association-based approach offers the additional benefits of predicting extent of dissociation and of allowing the Pitzer model to be fully utilized in commercial simulators, such as ASPEN Plus, that require accounting for association to implement Henry's law. The Pitzer models presented here provide the chemical process simulation engineer with a superior alternative to the Electrolyte NRTL model that can easily be used in ASPEN Plus.

  13. Corpo e velhice na contemporaneidade

    Directory of Open Access Journals (Sweden)

    Gabriela Felten da Maia

    2014-04-01

    Full Text Available A inegável atenção dada ao corpo na sociedade inspirou a construção deste trabalho, visto que os imperativos atuais são a beleza, a forma e o vigor. A velhice e a inexorabilidade da morte apresentam-se para este ideal como incômodos que devem ser afastados através de diversos hábitos "saudáveis" e “rejuvenescedores”, como a ginástica, os cosméticos, as vitaminas, procedimentos estético-cirúrgicos, entre outros. O modo de “ser velho”, então, passa a ser configurado não mais por estereótipos negativos, mas a partir de um ethos em que os idosos são apresentados como saudáveis, joviais, engajados, produtivos e autoconfiantes. São corpos que ultrapassam as marcas do tempo, atléticos, firmes e lisos. Logo, aqueles que não aderem a este ethos podem tornar-se desviantes, estranhos, velhos, ultrapassados e precisam, portanto, serem descartados ou escamoteados. Tendo em vista estas questões, o presente trabalho propõe-se a discutir sobre o tema velhice, corpo e sociedade, na tentativa de problematizar sobre os atuais modos de subjetivação e o envelhecimento na contemporaneidade.

  14. Synthesis of Na2Mg3X2 (X = Sn, Pb) and Na4Mg4Sn3 and their crystal structures and thermoelectric properties

    Science.gov (United States)

    Yamada, Takahiro; Ishiyama, Ryo; Yamane, Hisanori

    2015-07-01

    Novel ternary stannides and a plumbide, Na2Mg3X2 (X = Sn, Pb) and Na4Mg4Sn3, were synthesized by heating the corresponding elements. The crystal structures were determined by single-crystal X-ray diffraction analysis, and the electrical conductivities and Seebeck coefficients were measured. The crystal structures of Na2Mg3X2 [orthorhombic, a = 7.3066(9) Å, b = 14.4559(13) Å, c = 6.6433(7) Å for X = Sn, a = 7.4272(11), b = 14.770(3), c = 6.6852(11) Å for X = Pb] are based on the Mg5Ga2-type structure (space group Ibam, Z = 4). Na4Mg4Sn3 crystallizes in an orthorhombic cell [a = 6.879(3) Å, b = 7.154(2) Å, c = 22.285(7) Å, space group Fmmm, Z = 4] with layers of disordered Na atom arrangement with defects. The electrical conductivities measured for the polycrystalline sintered samples of Na2Mg3Sn2, Na4Mg4Sn3, and Na2Mg3Pb2 were 1.9 × 105 S m-1 at 300 K, 1.6 × 105 S m-1 at 307 K and 3.3 × 105 S m-1 at 300 K, respectively. The Seebeck coefficients (S) of Na2Mg3Sn2, Na4Mg4Sn3, and Na2Mg3Pb2 were +47 to +72, +29 to +67, and +10 to +24 µV K-1, respectively, and increased with increasing temperature of 300-600 K.

  15. Solid state diffusion of NaCl into NaY zeolite studied by positron annihilation

    International Nuclear Information System (INIS)

    A series of samples, prepared from mechanical mixtures of NaCl with NaY zeolite and resulting in the dispersion of NaCl in NaY, was studied by position annihilation spectroscopy. We measured the positron lifetime spectroscopy as a function of the weight ratio of the NaCl-NaY zeolite heated at 500 degree C for 1 h, as a function of the heating temperature held for 1 h, and as a function of the heating duration at 500 degree C for NaCl/NaY (15%). All the lifetime spectra were resolved into five components, in which the third, fourth and fifth components are related to the positron annihilation in β cage, supercage and interface void respectively. The experimental results showed that position annihilation spectroscopy is sensitive to the change of the dispersion of NaCl in NaY zeolite

  16. GREENHOUSE GAS EMISSIONS FROM T-25 AND T-27 MILITARY AIRCRAFTS AT PIRASSUNUNGA AIR BASE - SP, BRAZIL = EMISSÕES DE GASES DE EFEITO ESTUFA GERADAS POR AERONAVES MILITARES T-25 E T-27, NA BASE AÉREA DE PIRASSUNUNGA - SP

    Directory of Open Access Journals (Sweden)

    Carlos Roberto Sanquetta

    2014-10-01

    Full Text Available Aviation sector contributes with 2% of global CO2 emissions from anthropogenic sources. In Brazil, 1.8% of the emissions from the fuel are allocated to the sector. Scientific publications on GHG (Greenhouse Gases emissions for military aviation in Brazil are not available. This work quantifies the GHG emissions in two types of aircraft used to transport and training in the Air Base Pirassununga - SP: T - 25 and T-27. Flight times and fuel consumption (gasoline and jet fuel were evaluated for the years 2010 and 2011. From the emission factors were calculated CO2, CH4 and N2O emissions for the two aircraft models in the biennium. The total emission of the T-25 was 696.87 tCO2eq for the two-year period, resulting in an average of 348.43 tCO2eq/year, whereas for the T-27, the two-year emissions were 5,311.40 tCO2eq, i.e. 2,655.70 tCO2eq/year. The sum of both types of aircraft emissions results in 6,008.27 tCO2eq, or 3,004.14 tCO2eq/year. T-27’s emissions represent 88% and T-25’s 12%. The inventoried emission is equivalent to the GHG emissions of 1,311 small flex cars running 2,000 km/month during a whole year. It was concluded that the T-27’s emissions area greater than T-25’s due to its higher fuel consumption and higher emission factor of the jet fuel compared to aviation gasoline (used by T-25, as well as due to the greater use of this type of aircraft at the Air Base. = O setor de aviação contribui com 2% das emissões mundiais de CO2 por fontes antrópicas. No Brasil, 1,8% das emissões derivadas dos combustíveis são atribuídos ao setor. Não constam na literatura e demais meios de técnico-científicos publicações que reportem inventários de GEEs (Gases de Efeito Estufa para a aviação militar no Brasil. Este trabalho quantifica as emissões de GEEs em dois tipos de aeronaves usadas para transporte e treinamento na Base Aérea de Pirassununga-SP: T-25 e T-27. Foram avaliadas as horas de voo e o consumo de combust

  17. NA

    OpenAIRE

    Braga, Ataide R.

    1998-01-01

    The purpose of this research is to investigate when a Just-In-Time (JIT) inventory management technique is a worthwhile approach to managing inventories. Some experts in the field maintain that the additional transportation costs derived from using JIT and its costs due to frequent shipping is more than offset by the reduction in inventory levels. In this study a simulation is developed using the cost structure of Naval Air Station Lemoore for managing a selected group of items. Lemoore is co...

  18. NA

    OpenAIRE

    Dunn, Joseph F.

    1998-01-01

    The primary purpose of this thesis is to examine the legal ramifications of conducting Government Agency contracting on the Internet. The author proposes that the Internet is a suitable medium on which to process and conduct all aspects of Government contracting. The thesis examines the current legal issues surrounding contract formation across the open architecture of the Internet. The thesis then examines the latest cryptological schemes for both encryption and decryption and the logistical...

  19. NA

    OpenAIRE

    Dobel, Tracy A.

    1998-01-01

    This thesis examines progress toward gender integration at the Navy Recruit Training Command (RTC) in Great Lakes, Illinois. The study is largely descriptive, and attempts to determine if gender discrimination or gender bias occurs in the Navy's recruit training classes. The study adopted a definition of gender discrimination and gender bias by the American Association of University Women in a 1992 evaluation of gender equity in the educational setting. Focus group interviews were conducted w...

  20. ISKANJE IN IZBOR KADROV NA KLINIKI GOLNIK

    OpenAIRE

    Kopač, Mateja

    2014-01-01

    V diplomski nalogi smo predstavili Kliniko Golnik ter raziskovali in ugotavljali, na kakšen način pridobivajo in izbirajo ustrezne kadre. Diplomsko nalogo smo razdelili na dva dela, in sicer na teoretični in empirični oz. raziskovalni del. V prvem, teoretičnem delu smo opisali kadrovanje, načrtovanje kadrov, pridobivanje kadrov in njihovo selekcijo. Pri pridobivanju kadrov smo opisali analizo dela, postopek pridobivanja kadrov ter predstavili in opisali interno ter eksterno pridobivanje kadro...

  1. Hydrogen adsorption on Na-SWCNT systems

    OpenAIRE

    Nagare, Balasaheb. J.; Habale, Darshan; Chacko, Sajeev; Ghosh, Swapan

    2012-01-01

    We investigate the hydrogen adsorption capacity of Na-coated carbon nanotubes (Na-SWCNTs) using first-principles electronic structure calculations at absolute temperature and pressure. A single Na atom is always found to occupy the hollow site of a hexagonal carbon ring in all the six different SWCNTs considered, with a nearly uniform Na-C bond length of 2.5 A. Semiconducting zigzag nanotubes, (8,0) and (5,0), show stronger binding energies for the Na atom (-2.1 eV and -2.6 eV respectively), ...

  2. Impact of childhood stress on psychopathology Impacto de estresse na infância na psicopatologia

    Directory of Open Access Journals (Sweden)

    Elisa Brietzke

    2012-12-01

    Full Text Available OBJECTIVE: Advances in our knowledge of mental disorder (MD genetics have contributed to a better understanding of their pathophysiology. Nonetheless, several questions and doubts persist. Recent studies have focused on environmental influences in the development of MDs, and the advent of neuroscientific methodologies has provided new perspectives. Early life events, such as childhood stress, may affect neurodevelopment through mechanisms such as gene-environment interactions and epigenetic regulation, thus leading to diseases in adulthood. The aim of this paper is to review the evidence regarding the role of the environment, particularly childhood stress, in the pathophysiology of MD. METHODOLOGY: We reviewed articles that evaluated environmental influences, with a particular focus on childhood trauma, brain morphology, cognitive functions, and the development of psychopathology and MD. RESULTS AND CONCLUSION: MRI studies have shown that exposure to trauma at an early age can result in several neurostructural changes, such as the reduction of the hippocampus and corpus callosum. Cognitive performance and functioning are also altered in this population. Finally, childhood stress is related to an increased risk of developing MD such as depression, bipolar disorder, schizophrenia and substance abuse. We conclude that there is robust evidence of the role of the environment, specifically adverse childhood experiences, in various aspects of MD.OBJETIVO: Avanços no conhecimento da genética dos transtornos mentais (TM contribuíram para um melhor entendimento de suas bases fisiopatológicas. No entanto, dúvidas e questões ainda persistem. Estudos recentes têm se concentrado nas influências do ambiente no desenvolvimento de TM, e o advento de metodologias neurocientíficas oferece novas perspectivas. Eventos precoces de vida, como estresse na infância, podem ser capazes de alterar o neurodesenvolvimento através de mecanismos como intera

  3. O PAPEL DO IMAGINÁRIO NA FORMAÇÃO DE INFERÊNCIAS NA LEITURA

    Directory of Open Access Journals (Sweden)

    Sandra Regina Tornquist

    2008-04-01

    Full Text Available Este trabalho tem o objetivo de demonstrar que o imaginário, tomado sob o aspecto criador que lhe atribuem estudiosos como Gilbert Durand e Michel Maffesoli, entre outros, atua de forma decisiva sobre os tipos de inferências formadas a partir da leitura. Desenvolvido com base em pesquisa bibliográfica, este trabalho apresenta, inicialmente, os conceitos de imaginário adotados, bem como o material de pesquisa relativo à inferência em leitura, de maneira especial a obra Leitura: inferências e contexto sociocultural, de Regina Lúcia Péret Dell’Isola, com complementações a partir de obras de outros autores. Por fim, é analisado do papel desempenhado pelo imaginário na formação de inferências no ato de leitura. Através do estudo realizado, pode-se perceber que a inferência, criada na mente do leitor durante a leitura, é fruto do imaginário, sendo este fundamental na formação daquela, na medida em que aumenta o número de leituras possíveis. Por outro lado, a leitura também tem seu papel na constituição do imaginário, pois permite a formação de novas imagens que vão compô-lo e enriquecê-lo.

  4. Catalisadores cerâmicos à base de CuO/CeO2 aplicados na reação de oxidação preferencial do CO Ceramic catalysts based on CuO/CeO2 used in the reaction of preferential oxidation of CO

    Directory of Open Access Journals (Sweden)

    L. S. Neiva

    2012-09-01

    Full Text Available A oxidação preferencial do CO (PROX é o método mais adequado para a purificação de fluxos gasosos ricos em H2. Catalisadores de CuO/CeO2 têm sido desenvolvidos e apresentados como uma alternativa bastante promissora para a reação de oxidação preferencial do CO-PROX-CO. O objetivo deste trabalho é sintetizar catalisadores cerâmicos a base de CuO/CeO2 por meio do método de síntese Pechini, caracterizar e analisar as suas estruturas e avaliar a performance catalítica destes materiais aplicados na reação de PROX-CO. Foram desenvolvidas duas amostras de catalisadores cerâmicos à base CuO/CeO2, uma contendo 0,1 mol de CuO e outra contendo 0,5 mol do mesmo óxido. De acordo com os resultados, ambas as amostras sintetizadas mostraram-se aptas a serem utilizadas em processos de conversão de CO para CO2. No entanto, a amostra que continha 0,1 mol de CuO mostrou-se mais ativa cataliticamente do que a amostra que continha 0,5 mol da mesma espécie ativa catalítica.The preferential oxidation of CO (PROX is the most suitable method for the purification of gas streams rich in H2. CuO/CeO2 catalysts have been developed and presented as a promising alternative for the preferential oxidation reaction of CO - CO-PROX. The aim this work is to synthesize CuO/CeO2 ceramic catalysts by means of the synthesis Pechini's method, characterization and analysis the structures and evaluation of the performance of these materials used in catalytic reaction of CO-PROX. Two samples ceramic catalysts based on CuO/CeO2 were synthesized, the first containing 0.1 mol of CuO and the second containing 0.5 mol of CuO. According to the results, both synthesized samples were ready to be used in a process of converting CO to CO2. However, the sample containing 0.1 mol of CuO was more active than the catalyst sample containing 0.5 mol of the same active species.

  5. Objetivos de seleção e valores econômicos de características de importância econômica para um sistema de produção de leite a pasto na Região Sudeste Breeding goals and economic values for pasture based milk production systems in the Southeast region of Brazil

    Directory of Open Access Journals (Sweden)

    Vera Lúcia Cardoso

    2004-04-01

    Full Text Available Como parte de um estudo para o desenvolvimento de estratégias de seleção envolvendo animais da raça Holandesa e mestiços (Holandês x Zebu na região sudeste do Brasil, foram derivados valores econômicos para volume de leite (V, produção de gordura (G e de proteína (P, idade ao primeiro parto (IPP, peso adulto (PA e vida útil no rebanho (VU, para um sistema de produção de leite a pasto com vacas mestiças (Holandês x Zebu. O manejo alimentar foi baseado no pastejo rotacionado de capim-elefante durante a estação chuvosa e suplementação volumosa de silagem de milho na época da seca. O fornecimento de concentrados foi na base de 1 kg de concentrado para 2,5 kg de leite, quando as produções individuais excediam 6 kg de leite/dia. Foram realizadas análises de sensibilidade para avaliar o impacto das mudanças no sistema de pagamento e variações no preço do leite sobre os valores econômicos das características estudadas. Foram também derivados valores econômicos considerando-se como fonte alternativa de suplementação volumosa na seca a mistura cana-de-açúcar + uréia. Os valores econômicos (US$, de acordo com o sistema de pagamento corrente para V, G, P, IPP, PA e VU, foram, respectivamente, 0,15; -0,48; -0,31; -0,11; 0,08 e 0,04. Os resultados das análises de sensibilidade são apresentados e discutidos.As part of a preliminary study on the design of a breeding program involving Holstein Friesian and crossbred cattle (Holstein x Zebu in the Southeast region of Brazil, economic values for milk volume (V, fat (F and protein (P production, age at first calving (AFC, mature body weight (MBW and herd life (HL were derived for a pasture based milk production system of crossbred cattle (Holstein x Zebu. The feeding regime was based on rotational grazing of elephantgrass during the rainy season and grazing plus maize silage during the dry season. Concentrates were fed when daily individual productions exceed 6-kg milk (1 kg

  6. Avaliação de um programa computadorizado para intervenção fônica na dislexia do desenvolvimento Assessment of phonics-based literacy software for children with developmental dyslexia

    Directory of Open Access Journals (Sweden)

    Darlene Godoy de Oliveira

    2010-12-01

    Full Text Available A teoria do Déficit Fonológico explica as trocas e déficits de consciência fonológica em sujeitos com dislexia do desenvolvimento. Intervenções focadas nesse processamento contribuem para melhora da leitura. Este estudo verificou a eficácia do Software Alfabetização Fônica Computadorizada na promoção de consciência fonológica e correspondências grafofonêmicas em disléxicos. Vinte crianças disléxicas foram divididas em dois grupos (GI e GII e foram pareadas por idade, sexo e escolaridade. Os participantes realizaram provas de consciência fonológica e habilidades de leitura e de escrita. Os participantes do GI frequentaram 16 sessões de intervenção e, após o período, os grupos foram reavaliados. Houve aumento significativo no escore do GI na prova de compreensão de leitura de sentenças e de consciência fonológica. O mesmo grupo apresentou diminuição significativa no tempo de execução de provas de leitura e de escrita de palavras isoladas. Nesse sentido, a intervenção trouxe benefícios para a leitura dos disléxicos.The Phonological Deficit theory explains confusions and deficits in phonological awareness presents in subjects with Developmental Dyslexia. Interventions focused on this process contributes to improvement in reading. The study examined the effectiveness of a Phonic Literacy Software in promoting phonological awareness and graphophonemic correspondences in dyslexic. Twenty dislexic children were divided in two groups (GI and GII and were paired by age, sex and schooling. All subjects performed tests of phonological awareness and reading skills and writing. The participants of GI participated in 16 intervention sessions and, after this period, the groups were reevaluated. There was significant increase in the score of the GI in reading comprehension of sentences task and phonological awareness task. The same group presented significant decrease in execution time in word reading and written words

  7. Morphological tuning and enhanced luminescence of NaEuF4 nano-/submicro-crystals

    International Nuclear Information System (INIS)

    Graphical abstract: - Highlights: • NaEuF4 nano-/submicro-crystals were prepared via hydrothermal process. • The pH and Cit3−/Eu3+ ratio have an important role in the growth of NaEuF4. • Enhanced luminescence was observed in NaEuF4 spheres with smaller size. • J–O theory was used for analysis of luminescent properties of NaEuF4 phosphor. - Abstract: NaEuF4 nano-/submicro-crystals with various morphologies including regular nano-spheres, submicro-spheres, submicro-spindles and hexagonal submicro-rods were prepared through a facile hydrothermal process by adjusting the pH value and the molar ratio of Na3Cit/Eu3+ in the precursor solution. The resultants were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and photoluminescence spectroscopy (PL). The possible formation mechanisms for the morphology-varied NaEuF4 crystals were proposed based on the FE-SEM observation. The luminescent properties of NaEuF4 spheres with different particle size were studied. It was found that the luminescent intensities of NaEuF4 spheres increase with the decrease of particle size. Finally, the mechanism of luminescent enhancement was discussed

  8. Rooting of herbaceous cuttings of guava selection 8501-1 submitted to basal lesion and IBA concentrations / Enraizamento de estacas herbáceas da seleção 8501-1 de goiabeira submetidas a lesão na base e a concentrações de AIB

    Directory of Open Access Journals (Sweden)

    Sergio Ruffo Roberto

    2008-08-01

    Full Text Available This work aimed to evaluate the influence of different concentrations of indolebutiric acid (IBA on the rooting potential of 0- cm long herbaceous cuttings of guava selection 850 - , submitted or not to basal lesions. The cuttings were prepared in two ways (with or without basal lesions and submitted to four concentrations of IBA (0 mg L- , ,000 mg L- , ,000 mg L- and 3,000 mg L- . After the lesions were made, the cuttings were placed to root in plastic boxes containing carbonized rice husk. The experiment was randomized with five replicates in 2 x 4 factorial arrangement, where each plot was composed by 0 cuttings. After 85 days, the following variables were evaluated: foliar retention (%; rooted cuttings (%; cutting survival rate (%; cuttings with callus but without roots (%; root number per cutting; root length per cutting and wet and dry root matter per cutting (g. There is no significant contrast amongst the IBA different concentrations related to the percentage of rooted cuttings, but there is a significant difference related to the root number per cutting and wet and dry root matter per cutting where the doses of ,000 and 3,000 mg L- showed the highest averages; the basal lesions do not bring improvements on the cutting rooting potential; the 3,000 mg L- IBA concentrations resulted in the largest number of roots per cutting.Este trabalho objetivou avaliar o efeito de diferentes concentrações de ácido indolbutírico (AIB, na capacidade de enraizamento de estacas herbáceas de goiabeira, preparadas com e sem lesão na base. Foram utilizadas estacas com aproximadamente 0- cm de comprimento, submetidas a dois tipos de preparo (com lesão e sem lesão na base e quatro concentrações do AIB (0 mg L L- , .000 mg L L- , .000 mg L L- e 3.000 mg L L- . As estacas foram colocadas para enraizar em caixas plásticas contendo casca de arroz carbonizada. O delineamento experimental foi o inteiramente casualizado com cinco repetições, em arranjo

  9. Variabilidade na coordenação motora: uma abordagem centrada no delineamento gemelar Variabilidad en la coordinación motora: un enfoque centrado en el delineamiento gemelar Variability in motor coordination: an approach based on the twin design

    Directory of Open Access Journals (Sweden)

    Raquel Nichele de Chaves

    2012-06-01

    Full Text Available O propósito deste estudo foi estimar a contribuição dos fatores genéticos e ambientais na variabilidade do desempenho interindividual na coordenação motora. A amostra foi constituída por 64 pares de gêmeos portugueses, com idades entre cinco e 14 anos. Avaliou-se o desempenho da coordenação através das quatro provas da bateria KTK: equilíbrio à retaguarda (ER; saltos monopedais (SM; transposição lateral (TL; saltos laterais (SL. Calculou-se o coeficiente de correlação intraclasse (t, sendo estimada a contribuição dos fatores genéticos (a², ambientais comuns (c² e únicos (e². Os resultados mostram valores de t mais elevados entre gêmeos monozigóticos, sugerindo presença de fatores genéticos. Entretanto, estimativas de a² foram baixas, variando entre 15% (TL e 41% (SM, enquanto para c² situaram-se entre 46% (SL e 58% (TL, e para e² entre 11% (SM e 28% (TL. Conclui-se que fatores ambientais são responsáveis pela maior parcela de influência na variabilidade do desempenho na coordenação motora.El objetivo del presente estudio fue estimar la contribución de los factores genéticos y ambientales en la vEl objetivo del presente estudio fue estimar la contribución de los factores genéticos y ambientales en la variabilidad del desempeño interindividual en la coordinación motora. La muestra fue constituida por 64 pares de gemelos portugueses, con edades entre 5 y 14 años. Se evaluó el desempeño de la coordinación a través de las cuatro pruebas de la batería KTK: equilibrio a la retaguardia (ER; saltos monopedales (SM; transposición lateral (TL; saltos laterales (SL. Se calculó el coeficiente intraclase (t, siendo estimada la contribución de los factores genéticos (a², ambientales comunes (c² y únicos (e². Los resultados muestran valores t mas elevados entre gemelos monocigóticos, sugiriendo la presencia de factores genéticos. Por otro lado, estimaciones de a² fueron bajas, variando entre 15% (TL y

  10. Potencial de extratos à base de Calendula officinalis L. na indução da síntese de fitoalexinas e no efeito fungistático sobre Botrytis cinerea, in vitro Potential of Calendula officinalis L. extracts in inducing phytoalexin synthesis and fungistatic effect on Botrytis cinerea in vitro

    Directory of Open Access Journals (Sweden)

    S.M. Mazaro

    2013-01-01

    Full Text Available Foram desenvolvidos três experimentos com o objetivo de avaliar o potencial de preparados a base de calêndula (Calendula officinalis L. na indução de fitoalexinas em cotilédones de soja, na indução de mecanismos de resistência em frutos de morango, e o efeito fungistático sobre Botrytis cinerea in vitro. O delineamento experimental foi inteiramente casualizado com quatro repetições, para 15 tratamentos resultantes da combinação de três formas de extração (extrato alcoólico, infusão, e maceração em cinco concentrações (zero; 1,25; 2,5; 5; e 10%. Os resultados demonstram que os preparados de C. officinalis apresentaram capacidade de indução das fitoalexinas gliceolinas em cotilédones de soja. Na aplicação dos preparados em pós-colheita de morangos ocorreu alteração no teor de flavonóides, bem como a atividade da enzima FAL foi estimulada pela aplicação dos extratos; no entanto, não foi constatado o controle de podridão dos frutos. O efeito fungistático foi observado na extração por maceração em todas as suas concentrações reduzindo o crescimento do fungo B. cinerea in vitro sendo que, a partir de 2,5%, observou-se inibição total. A extração por infusão também apresentou resposta positiva na redução do crescimento de B. cinerea, com melhor resposta na concentração de 10% do preparado.Three experiments were carried out to evaluate the potential of calendula (Calendula officinalis L. extracts for phytoalexin induction in soybean cotyledons, resistance mechanism induction in strawberry fruits and fungistatic effect on Botrytis cinerea in vitro. Experimental design was completely randomized with 15 treatments resulting from the combination of three forms of extraction (alcohol extract, infusion and maceration at five concentrations (zero, 1.25, 2.5, 5 and 10%. Results showed that C. officinalis extracts could induce the phytoalexins glyceollins in soybean cotyledons. In the application of extracts

  11. Aplicabilidade da metodologia de reação de polimerase em cadeia em tempo real na determinação do percentual de organismos geneticamente modificados em alimentos Applicability of the real-time polymerase chain reaction based-methods in quantification of genetically modified organisms in foods

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    Natália Eudes Fagundes de Barros

    2008-02-01

    Full Text Available A detecção de organismos geneticamente modificados na cadeia alimentar é um aspecto importante para todos os assuntos envolvidos no controle de matéria-prima, na indústria de alimentos e na distribuição. A rotulagem e a rastreabilidade de organismos geneticamente modificados são questões atuais que são consideradas para o comércio e a regulamentação. Atualmente, a rotulagem de alimentos processados contendo material transgênico detectável é exigida pela legislação brasileira. O governo brasileiro publicou Decreto nº 4.680 em abril de 2003, que exige rotulagem para todos os alimentos ou ingredientes de alimento, com o limite para rotulagem de 1%. Embora a tecnologia de reação em cadeia da polimerase tenha algumas limitações, a alta sensibilidade e especificidade explicam sua escolha por parte dos laboratórios interessados em realizar análises de detecção de organismos geneticamente modificados e seus derivados. Entre os métodos atualmente disponíveis, aqueles baseados na reação em cadeia da polimerase geralmente são aceitos, considerando a sensibilidade e a confiabilidade na detecção de material geneticamente modificado-derivado em análises de rotina. Neste artigo, apresenta-se uma revisão de métodos atualmente disponíveis baseados na reação em cadeia da polimerase para detecção, identificação e quantificação de organismos geneticamente modificados e seus derivados, discutindo sua aplicabilidade e suas limitações.Detection of genetically modified organisms in the food chain is an important issue for all subjects involved in raw material control, food industry and distribution. Both labeling and traceability of genetically modified organisms are current issues that are considered for trade and regulation. Currently, labeling of genetically modified foods containing detectable transgenic material is required by the Brazilian legislation. The Brazilian government published the Decree nº 4.680 in April

  12. OGLED FIZIKALNIH EKSPERIMENTOV NA DALJAVO

    OpenAIRE

    Hladen, Sašo

    2012-01-01

    Fizikalni eksperiment je najosnovnejše in najpomembnejše orodje za motivacijo, razlago snovi, utrjevanje in dokazovanje fizikalnih pojavov in zakonov. V drugem poglavju smo govorili o uporabi računalnika v izobraževanju in fiziki. Govorimo o zgodovinskem vključevanju računalnika v izobraževanje, o značilnostih fizikalnih eksperimentov in uporabi računalnika pri pouku fizike. Govorimo še o tipu aplikacij, ki omogočajo spremljanje in izvajanje fizikalnih eksperimentov na daljavo, ter spoznam...

  13. RAZVOJ PRODUKTOV NA OSNOVI ANTIOCIANINOV

    OpenAIRE

    Vatai, Tünde

    2009-01-01

    Antocianini so skupina polifenolov, ki so odgovorni za barvno raznolikost cvetov in sadežev, od rumene, oranžne, rdeče, roza, do modre. V primerjavi s sintetičnimi barvili so nestabilni, kar predstavlja glavni problem pri njihovi uporabi in se lahko pokaže kot sprememba barve med procesiranjem in skladiščenjem. Glavni cilj doktorske disertacije je bil razviti produkt, naravno barvilo na osnovi antocianinov, ki bo ustrezno stabilen in bo predstavljal alternativo sintetičnim barvilom za uporabo...

  14. Micotoxinas e Micotoxicoses na Avicultura

    OpenAIRE

    Santurio JM

    2000-01-01

    Esta revisão tem como objetivo principal mostrar, baseado em dezenas de pesquisas realizadas, os efeitos tóxicos das micotoxinas aflatoxinas, tricotecenos, zealenona e fumonisinas sobre o desempenho das aves. O descobrimento das propriedades hepatotóxicas e hepatocarcinogênicas de algumas linhagens de Aspergillus flavus e A. parasiticus em perus, na Inglaterra, no início da década de 1960, seguida pela elucidação da estrutura de seus metabólitos tóxicos, as aflatoxinas, deu novo enfoque e pri...

  15. Design pistole na laser game

    OpenAIRE

    Krakovský, Jakub

    2014-01-01

    Předmětem této bakalářské práce je design pistole na laser game. Cílem je vytvořit funkční návrh futuristické zbraně respektující technické, ergonomické a estetické požadavky. The main subject of this bachelor thesis is to design the laser game gun. The goal of the design is to create a functional concept of futuristic gun respecting technical, ergonomic and aesthetic requirements. D

  16. The NA62 run control

    International Nuclear Information System (INIS)

    The NA62 experiment at CERN SPS will soon start taking data to measure the ultra-rare decay K+ → π+v v-bar . The requirement to reach a rejection factor of 1012 can be obtained with a large number of VETO and particle identification detectors as well as momentum measurement spectrometers. All components are included in the Trigger and/or Data Acquisition system. The RunControl has been designed to centrally link them to achieve their control and monitoring while still allowing non-experts shifters to run the experiment easily

  17. VPLIV VODENJA NA RAZVOJ ORGANIZACIJE

    OpenAIRE

    Rauš, Ivo

    2010-01-01

    Ključno vlogo pri razvoju človeških potencialov in sproščanju posameznikovih notranjih zmožnosti imajo njihovi neposredni vodje. Le ti naj bi skrbeli za ustvarjanje takega delovnega okolja, ki bo spodbujalo ustvarjalne dosežke, inovativnost, izvirnost idej, pripadnost in timsko sodelovanje. Vodenje zavzema prvo mesto na lestvici ključnih managerskih izzivov sedanjosti in srednjeročne prihodnosti, o čemer govorijo tudi številne zadnje raziskave ameriških in evropskih strokovnjakov za razvoj...

  18. Associação entre fatores socioeconômicos e insegurança alimentar: estudo de base populacional na Região Metropolitana do Rio de Janeiro, Brasil Association between socioeconomic factors and food insecurity: a population-based study in the Rio de Janeiro metropolitan area, Brazil

    Directory of Open Access Journals (Sweden)

    Rosana Salles-Costa

    2008-08-01

    Full Text Available OBJETIVO: Estimar a prevalência de insegurança alimentar em famílias de Duque de Caxias, município localizado na Região Metropolitana do Rio de Janeiro, e avaliar a associação entre indicadores socioeconômicos e insegurança alimentar. MÉTODOS: Desenvolveu-se estudo transversal, de base populacional, em famílias do distrito de Campos Elíseos, município de Duque de Caxias, Rio de Janeiro, que investigou amostra probabilística composta por 1.085 domicílios. As informações sobre condições socioeconômicas foram obtidas por meio de entrevista, utilizando questionário estruturado. A insegurança alimentar foi avaliada com o uso da Escala Brasileira de Insegurança Alimentar, que permite classificar as famílias em segurança alimentar ou em insegurança alimentar leve, moderada ou grave. As análises foram desenvolvidas levando em consideração o efeito do desenho da amostra. Foi estimada a prevalência de insegurança alimentar, avaliando-se sua associação com as variáveis socioeconômicas aplicando-se o teste do qui-quadrado (pOBJECTIVE: This work aims to evaluate the prevalence of food insecurity among families from Duque de Caxias, in the Rio de Janeiro Metropolitan Area and the association between socioeconomic indicators and food insecurity. METHODS: A population-based cross-sectional study investigated a probabilistic sample composed of 1,085 households from the district of Campos Elíseos, in the municipality of Duque de Caxias, Rio de Janeiro, Brazil. Information on socioeconomic condition was obtained using a structured questionnaire. Food insecurity was assessed by the Brazilian Food Insecurity Scale, which allows classifying the families into food security, or mild, moderate or severe food insecurity. The analyses took into account the sampling design effect. The food insecurity prevalence was estimated and its association with socioeconomic variables was assessed using the chi-square test (p<0.05. RESULTS: Food

  19. Heterogeneous nucleation of ice from supercooled NaCl solution confined in porous cement paste

    OpenAIRE

    Zeng, Qiang; Li, Kefei; FEN CHONG, Teddy

    2015-01-01

    Clarifying the nucleation process of chloride-based deicing salt solution (e.g., NaCl solution) confined in cement-based porous materials remains an important issue to understand its detrimental effects on material substrates. In this study, the pore structures of hardened cement pastes were characterized by mercury-intrusion and nitrogen-sorption porosimetry. The ice nucleation temperature of NaCl solution of different concentrations confined in the hardened cement pastes was measured and an...

  20. Micotoxinas e Micotoxicoses na Avicultura

    Directory of Open Access Journals (Sweden)

    Santurio JM

    2000-01-01

    Full Text Available Esta revisão tem como objetivo principal mostrar, baseado em dezenas de pesquisas realizadas, os efeitos tóxicos das micotoxinas aflatoxinas, tricotecenos, zealenona e fumonisinas sobre o desempenho das aves. O descobrimento das propriedades hepatotóxicas e hepatocarcinogênicas de algumas linhagens de Aspergillus flavus e A. parasiticus em perus, na Inglaterra, no início da década de 1960, seguida pela elucidação da estrutura de seus metabólitos tóxicos, as aflatoxinas, deu novo enfoque e prioridade para a pesquisa sobre micotoxinas. Análises de aflatoxinas realizadas no Laboratório de Análises Micotoxicológicas (LAMIC da Universidade Fedaral de Santa Maria, entre os anos de 1986 e janeiro de 2000, em 15.600 amostras de alimentos destinados principalmente ao consumo animal, demonstram que no milho analisado, 41,9% das amostras estavam contaminadas por aflatoxinas. Em surtos de aflatoxicose no campo, uma das características mais marcantes é a má absorção que se manifesta como partículas de ração mal digeridas na excreta das aves. Também observa-se, em frangos e poedeiras que recebem AFL, extrema palidez das mucosas e pernas. Dietas deficientes em riboflavina ou colecalciferol (vit. D tornaram frangos sensíveis, nos índices de desenvolvimento corporal, a concentrações muito baixas de AFL. O efeito aflatoxina nos frangos é maior na fase inicial de crescimento, ou seja, quando as aves ingeriram aflatoxina nos primeiros 21 dias de vida, e quanto maior o nível de stress do lote, menor a quantidade de AFL para afetar negativamente seu desempenho, seja na produção de carne ou de ovos. As principais micotoxinas do grupo dos tricotecenos são: toxina T-2; deoxynivalenol (DON; diacetoxyscirpenol (DAS, todas produzidas através de diversas espécies de fungos do gênero Fusarium. Além dos tricotecenos, o fusarium também pode produzir zearalenona e fumonisinas. Dessas fusarium-toxinas, somente toxina T-2 gera patologias s

  1. Çoklu Zekâ Kuramına Dayalı Öğretim Uygulamalarının Öğrencilerin Okuduğunu Anlama Becerilerine Etkisi The Effect Of Teaching Applications Based On Multiple Intelligence Theory On Students’ Reading Comprehension Skills

    Directory of Open Access Journals (Sweden)

    Cahit EPÇAÇAN

    2013-03-01

    Full Text Available The purpose of this study is to determine the effect of teachingimplementations based on multiple intelligence theory on students’reading comprehension skills in primary school. In the study,experimental model of pre-test and post-test with control group havebeen used. The group of study has been composed of 7. class studentsof second grade in Sancaklar Primary School which is dependent onPublic Education Management in Siirt. Experiment and control groupsare composed of these students. In order to achieve the objectives of thestudy, appropriate class activities have been prepared for the teachingapplications based on Multiple Intelligence Theory. These activities havebeen implemented according to students’growth and learning levels. Onthe purpose of determining the effects of teaching implementationsbased on multiple intelligence theory on students’ readingcomprehension skills not only quantitative but also qualitative means ofdata collections have been put into account. The quantitativedatacollections have been obtained by the readiness test of Turkishlanguage course and test of reading comprehension. The qualitativedata of study, has been collected by making use of interview formproviding teachers and students’ views regarding the learning andteaching process. According to the results obtained from thequantitative and qualitative data, it has been appointed that Theteaching applications based on Multiple Intelligence Theory in primaryschool have been more effective on increasing the levels of student’sreading comprehension. By means of the effectiveness of the teachingimplementations based on multiple intelligence theory on developingstudents’ reading comprehension skills, It was determined that thequantitative data of the study, the qualitative data based on the views ofthe teachers and students, and the research results on the multipleintelligence theory’s effectiveness in teaching all corresponds toeachother. Bu

  2. Tipologia de qualificação da força de trabalho: uma proposta com base na noção de incompatibilidade entre ocupação e escolaridade

    Directory of Open Access Journals (Sweden)

    Ana Flávia Machado

    2004-01-01

    Full Text Available This article seeks to verify the mismatch between labor force educational attainment and occupational requirements by sex, age, region, economic sector, and occupation. Data are from the Brazilian National Household Survey (PNAD for the years 1981 to 2001. We observe over-qualification in many occupations. Based on this finding, we propose an occupational taxonomy based on skill level required.

  3. Low-spin states of 23Na

    International Nuclear Information System (INIS)

    A study of 23Na via the 22Ne(p,γ)23Na and 23Na(γ,γ)23Na reactions is presented. Only a limited number of resonances has been studied, selected on the basis of strong excitation of the lowest levels of which the spin was unknown. As a result the spins are now known of all levels of 23Na with excitation energies up to 7 MeV, except for a few high-spin states which are too weakly excited in the decay of the known 22Ne(p,γ) resonances. The mean lifetimes of the 23Na levels at 4.43 and 7.89 MeV were found to be 350±70 and 220±17 attoseconds (1 attosecond = 10-18 seconds) respectively. 97 refs.; 22 figs.; 12 tabs

  4. Utjecaj uvjeta tiskanja na strukturu FDM prototipova

    OpenAIRE

    Gajdoš, Ivan; Slota, Ján

    2013-01-01

    Osnovni nedostatak prototipova nastalih 3D tiskanjem metodom taloženja (FDM) je nehomogenost strukture koja proizlazi iz osnovnog principa te tehnike. Cilj je ovoga rada pokazati kako promjena radne temperature i rasporeda na osnovnoj ploči utječe na strukturu FDM prototipova. Kako bi se odredio utjecaj obradne temperature na strukturu nastajanja FDM prototipova, primijenjene su različite temperature glave i omotača kod tiskanja uzoraka. Uzorci su analizirani kompjuterskom tomografijom da bi ...

  5. Vpliv vetrnih elektrarn na stabilnost elektroenergetskega sistema

    OpenAIRE

    GYOEFI, TOMI

    2014-01-01

    V diplomskem delu so, na podlagi literature, analizirane dinamične lastnosti različnih tipov vetrnih elektrarn v elektroenergetskem sistemu. Namen dela je ponuditi pregled generacije vetrne energije, pri katerem je poudarek na vplivu vetrnih elektrarn na stabilnost elektroenergetskega sistema. Podani so osnovni mehanizmi delovanja asinhronskega generatorja, dvojno napajanega asinhronskega generatorja in sinhronskega generatorja s pretvornikom, njihovo tranzientno obratovanje in zmožnost...

  6. Estudo computacional das interacções proteína-proteína

    OpenAIRE

    Santos, Sérgio Miguel Cardoso Marcelino dos, 1986-

    2010-01-01

    O reconhecimento molecular é um processo chave em sistemas biológicos. A replicação e transcrição do ADN, a adesão celular, as cascatas de sinalização e ciclos metabólicos são alguns dos processos que têm por base o reconhecimento molecular. A compreensão destes processos exige que se conheçam as interacções de proteínas que estão na base dos mesmos. O modo como duas proteínas interagem pode ser difícil de prever, sobretudo se estas estabelecerem interacções transientes. O Docking é um método...

  7. Energetska prenova na primeru javne stavbe

    OpenAIRE

    Mrhar, Urša

    2015-01-01

    V diplomskem delu je prikazana teoretična študija energetske prenove javne stavbe in vpliv nabora različnih ukrepov prenove na zmanjšanje količine potrebne energije za obratovanje stavbe. V delu je analizirana občinska stavba, na Gorenjski cesti 3, v Ribnici na Dolenjskem. Stavba je vpisana v Register kulturne dediščine, zato so v rešitvi energetske sanacije upoštevani tudi kulturnovarstveni pogoji. Analiza konstrukcijskih sklopov je bila narejena s programom TEDI. Prikazana je...

  8. Fabrication of Implanted $^{22}$Na Targets

    CERN Multimedia

    2002-01-01

    A knowledge of the $^{22}$Na(p,$\\gamma$)$^{23}$ Mg reaction rate is of significant astrophysical interest. In order to complete previous studies of this reaction, radioactive $^{22}$Na targets of high purity are required. We ask for support to fabricate these targets via the implantation technique at ISOLDE GPS (off—line mode) using $^{22}$Na nuclides in an Al matrix produced in Nov. 1990 at the PSI (Zürich). The $^{22}$Na nuclides are released and ionized in a surface ionisation source, mass-analyzed at ISOLDE GPS, and implanted in a Ni-Ta backing and a C—foil in a special implantation setup.

  9. KARTICE ZVESTOBE V TRGOVINI NA DROBNO

    OpenAIRE

    Ferk, Aljaž

    2011-01-01

    Skozi diplomski seminar smo spoznali programe zvestobe odjemalcev, kateri nam pomagajo obdržati naše sedanje kupce tudi v prihodnosti. Programe zvestobe priporočamo vsem podjetjem ne glede na stroko, v kateri delujejo. Zadovoljen kupec se bo še vedno vračal nazaj k nam ter ostal zvest, dokler bomo zadovoljevali njegova pričakovanje glede naših izdelkov oz. storitev, njegova zvestoba pa nam bo prinašala dobiček. Primer programa zvestobe smo predstavili na podjetju Tuš Holding d.o.o., kater...

  10. SREDNJOVJEKOVNE GEMINAE NA OTOKU U SOLINU

    OpenAIRE

    Bužančić, Radoslav

    1998-01-01

    Na temelju dokumentacije iz Arhiva Dyggve i morfoloških elemenata na nedavno pronađenom Zečevićevu akvarelu stare župne crkve u Solinu, autor valorizira otkriće don Lovre Katića ranosrednjovjekovnih dvojnih crkava na Gospinu Otoku podignutih koncem 10. stoljeća po uzoru na zapadnoeuropske dvorove. U tekstu je ujedno korigirana i revalorizirana Karaman-Dyggveova teza i grafička rekonstrukcija crkava sv. Stjepana i sv. Marije.

  11. Analiza vsebine konservatorskih načrtov

    OpenAIRE

    Štukelj, Katja

    2016-01-01

    UVOD: Ohranjanje kulturne dediščine se začne s konservatorskim načrtom. Gre za dokument, v katerem so jasno napisane smernice in priporočila, kako in zakaj ohraniti spomenik. Prav tako so v njem ovrednoteni njegov pomen ter ranljivost in ogroženost. Za vse to je potreben enoten postopek vsebinske izdelave konservatorskih načrtov. Od leta 2009 to ureja Pravilnik o konservatorskem načrtu. NAMEN: Namen te raziskave je primerjati vsebino izbranih primerov konservatorskih načrtov, izdelanih v Slov...

  12. Pomorstvo i ribarstvo na otoku Rabu

    OpenAIRE

    Šćerbe Haupt, Božidarka

    2015-01-01

    Pomorstvo i ribarstvo na otoku Rabu, proizvod je autoričina sakupljanja jezične građe na otoku Rabu. Obrađena su mjesta: Banjol, Barbat, Kampor, Lopar i grad Rab. Autorica je sakupila građu 1988. godine na osnovu razgovora sa ispitanicima, starijim mještanima, uglavnom ribarima. Sve je snimljeno na audio kazetama. Građa je sakupljena prema Upitniku originala Bollettino dell'atlante linguistico mediterraneo iz 1959. godine, tiskan pri Institutu za kulturnu suradnju, Venecija/Rim. U uvodnom dij...

  13. The Alto Paraguay Alkaline Province: petrographic, geochemical and geochronological characteristics; Provincia alcalina Alto Paraguai: caracteristicas petrograficas, geoquimicas e geocronologicas

    Energy Technology Data Exchange (ETDEWEB)

    Velazquez Fernandez, Victor

    1996-12-31

    The Alto Paraguay Province is located at the border of the State of Mato Grosso do Sul and Paraguay, between the coordinates 21 deg 10{sup `}to 23 deg 25{sup `}of Southern latitude and 57 deg 10{sup `} to 58 deg 00{sup `}, having the city of Porto Murtinho as the main reference point. The geotectonic domain of the area is governed by the precambric units of the Southern extreme of the Amazonic craton which developed a long and accentuated activity, giving rise to folds and important faults, that in several cases seem to have exerted an effective control of the magmatic manifestations. Radiometric data indicate that the emplacement of the syenitic bodies took place in the Permo-Triassic period, with a major incidence in the interval 260-240 Ma, representing thus, an important phase of alkaline magmatic affinity associated to the Parana Basin which is believed is to be unique, since the other known areas (Central, Amambay and Rio Apa Provinces, Paraguay, Velasco Province, Bolivia) are considerably younger (140-120 Ma). Syenitic rocks from the Alto Paraguay Province show wide variation in the ratio {sup 87} Sr/{sup 86} Sr (0.703361 - 0.707734). Excluding the Cerro Boggiani rocks (0.703837-0.707734), values for the nepheline syenites (0.703361-0.703672) general lower than those of the other syenites types. Alkaline syenites cover the interval 0.703510- 0.703872, while quartz syenites and syenogranites are 0.704562 and 0.707076, respectively. geologic evidence, in addition to petrographic, geochemical and isotopic (Sr) data, suggest that the syenitic rocks have been derived from an unique mantelic parental liquid, by fractional crystallization and assimilation processes, which are assumed to be occurred during the emplacement of the magma in the crust. (author) 124 refs., 52 figs., 7 tabs.

  14. Gas geochemistry: a new technology to evaluate petroleum systems; Geoquimica de gases: uma nova tecnologia em avaliacao de sistemas petroliferos

    Energy Technology Data Exchange (ETDEWEB)

    Santos Neto, Eugenio Vaz dos [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas. Gerencia de Geoquimica]. E-mail: eugenioneto@petrobras.com.br

    2004-11-01

    In the last decade hydrocarbon gas geochemistry has significantly evolved especially regarding to the widespread use of GC-C-IRMS (Gas chromatography-combustion-ion ratio monitoring system) techniques that allowed accurate measurements of {delta}{sup 13} C in the C{sub 1}-C{sub 4} fraction. Also, due to the improvement of the sampling procedures, sample collection - relatively small amounts of gas samples at low pressure - has become easier, sample transportation has become safer - the risk of accidents has been reduced - and analysis has become faster. The 'state-of-the-art' of the use of gas geochemistry to study processes within petroleum systems is discussed in this paper. The discussion is mainly focused on the identification of the hydrocarbon gas origin (biogenesis versus thermo genesis, mixing) and hydrocarbon gas generation (primary versus secondary cracking), including the inference of the relative thermal evolution and possible secondary alterations caused by biodegradation, secondary migration and eventually leakage from petroleum accumulations. Brief comments were also made about the new technologies involving noble gases and their potential use as tracers of processes in petroleum systems. Additionally, the origin of non-hydrocarbon gases in petroleum accumulations is succinctly discussed, as well as their possible economic impacts. The use of gas geochemistry techniques has brought a significant improvement in the understanding of petroleum systems under exploration in Brazil and in other parts of the world. Besides, on-going research projects suggest that there is a great potential for technological advances, e.g., adding the hydrogen isotopic composition of hydrocarbons to the interpretations, and also integrating the available results to the isotopic variations of noble gases. (author)

  15. Influência dos agentes clareadores e um refrigerante a base de cola na microdureza do esmalte dental e a ação da saliva na superfície tratada = Influence of bleaching agents and a carbonated soft drink on dental enamel microhardness as well as the artificial saliva effect on the treated surface

    OpenAIRE

    Araújo, Rodrigo Maximo de; Torres, Carlos Rocha Gomes; de Araújo, Maria Amélia Máximo

    2006-01-01

    O objetivo deste estudo foi avaliar os efeitos de três agentes clareadores e uma bebida carbonatada, à base de cola, sobre a microdureza do esmalte dental, assim como os efeitos da saliva artificial sobre o esmalte tratado com estes agentes. Foram utilizados quarenta dentes incisivos bovinos embutidos em resina acrílica. As amostras foram avaliadas em microdurômetro (Future Tech FM 700) após a divisão em quatro grupos, uma leitura inicial da microdureza serviu como controle do experimento: Gr...

  16. A haptic floor for interaction and diagnostics with goal based tasks during virtual reality supported balance training: Haptična tla za interakcijo in diagnostiko s ciljno zasnovano nalogo vaditi ravnotežje, podprti z navideznim okoljem:

    OpenAIRE

    Cikajlo, Imre; Krpič, Andrej; Matjačić, Zlatko; Savanović, Arso

    2014-01-01

    Background: Balance training of patients after stroke is one of the primary tasks of physiotherapy after the hospitalization. It is based on the intensive training, which consists of simple, repetitive, goal-based tasks. The tasks are carried out by physiotherapists, who follow predefined protocols. Introduction of a standing frame and a virtual reality decrease the physical load and number of required physiotherapists. The patients benefit in terms of safety and increased motivation. Additio...

  17. Levobupivacaína versus bupivacaína em anestesia peridural para cesarianas: estudo comparativo Levobupivacaína versus bupivacaína en anestesia peridural para cesáreas: estudio comparativo Levobupivacaine versus bupivacaine in epidural anesthesia for cesarean section: comparative study

    Directory of Open Access Journals (Sweden)

    Felipe Bergamaschi

    2005-12-01

    uso de bupivacaína racémica con levobupivacaína en anestesia peridural de pacientes sometidas a cesárea electiva. MÉTODO: Ensayo clínico eventual, doblemente encubierto, con gestantes estado físico ASA I y II. Las pacientes fueron distribuidas para recibir 20 mL de bupivacaína a 0,5% racémica ó 20 mL de levobupivacaína a 0,5%, ambas con 10 µg de sufentanil y vasoconstrictor. RESULTADOS: Participaron del estudio 47 pacientes, 24 en el grupo de la levobupivacaína y 23 en el grupo de la bupivacaína. Los grupos eran comparables entre sí en lo que se refiere a las características materno-fetales. Transcurridos 15 minutos después del término de la punción peridural, 62,5% de las pacientes del grupo de la levobupivacaína tenían Bromage 2 ó 3 contra 72,7% en el grupo de la bupivacaína (p = 0,83. Transcurridos veinte minutos, 66,7% de las pacientes del grupo de la levobupivacaína tenían Bromage 2 ó 3 contra 86,3% del grupo de la bupivacaína (p = 0,21. La complicación más frecuente fue la hipotensión arterial, encontrada en 16 (66,7% pacientes del grupo de la levobupivacaína y en 10 (43,5% pacientes del grupo de la bupivacaína (p = 0,11. CONCLUSIONES: La levobupivacaína y la bupivacaína fueron igualmente efectivas en el bloqueo peridural de pacientes sometidas a cesárea.BACKGROUND AND OBJECTIVES: Local anesthetic bupivacaine is found in two different enantiomers: levobupivacaine - S (- and dextrobupivacaine - R (+. Based on studies showing that S(- enantiomers are less cardiotoxic, their use has been increasing in clinical practice. This study aimed at comparing racemic bupivacaine and levobupivacaine in epidural anesthesia for elective cesarean section. METHODS: Randomized, double blind clinical trial enrolling physical status ASA I and II parturients. Patients were assigned to receive either 20 mL of 0.5% racemic bupivacaine or 20 mL of 0.5% levobupivacaine, both with 10 µg sufentanil and epinephrine 1:200,000. RESULTS: Participated in this

  18. Peroxide bleaching agent effects on enamel surface microhardness, roughness and morphology Efeitos de agentes clareadores à base de peróxidos na microdureza, rugosidade e morfologia superficial do esmalte

    Directory of Open Access Journals (Sweden)

    Cristiane Franco Pinto

    2004-12-01

    com o indentador Knoop, e a rugosidade superficial foi verificada através do rugosímetro. Observações morfológicas foram realizadas através de microscopia eletrônica de varredura (MEV. Os resultados foram estatisticamente analisados com ANOVA (dois fatores e teste Tukey (5% e revelaram uma redução significante nos valores de microdureza e um aumento significante da rugosidade de superfície após o clareamento. Alterações na morfologia do esmalte após o clareamento foram observadas através de MEV. Concluiu-se que os agentes clareadores podem alterar a microdureza, rugosidade e morfologia superficial do esmalte dental.

  19. Bright reddish-orange emission and good piezoelectric properties of Sm2O3-modified (K0.5Na0.5)NbO3-based lead-free piezoelectric ceramics

    International Nuclear Information System (INIS)

    Reddish orange-emitting 0.948(K0.5Na0.5)NbO3-0.052LiSbO3-xmol%Sm2O3 (KNN-5.2LS-xSm2O3) lead-free piezoelectric ceramics with good piezoelectric properties were fabricated in this study, and the photoluminescence and electrical properties of the ceramics were systematically studied. Results showed that Sm2O3 substitution into KNN-5.2LS induces a phase transition from the coexistence of orthorhombic and tetragonal phases to a pseudocubic phase and shifts the polymorphic phase transition (PPT) to below room temperature. The temperature stability and fatigue resistance of the modified ceramics were significantly improved by Sm2O3 substitution. The KNN-5.2LS ceramic with 0.4 mol. % Sm2O3 exhibited temperature-independent properties (25–150 °C), fatigue-free behavior (up to 106 cycles), and good piezoelectric properties (d33* = 230 pm/V, d33 = 176 pC/N, kp = 35%). Studies on the photoluminescence properties of the samples showed strong reddish-orange emission upon blue light excitation; these emission intensities were strongly dependent on the doping concentration and sintering temperature. The 0.4 mol. % Sm2O3-modified sample exhibited temperature responses over a wide temperature range of 10–443 K. The maximum sensing sensitivity of the sample was 7.5 × 10−4 K at 293 K, at which point PPT occurred. A relatively long decay lifetime τ of 1.27–1.40 ms and a large quantum yield η of 0.17–0.19 were obtained from the Sm-modified samples. These results suggest that the KNN-5.2LS-xSm2O3 system presents multifunctional properties and significant technological potential in novel multifunctional devices

  20. Azijski pogled na transplantaciju organa

    OpenAIRE

    Tai, Michael Cheng-tek

    2008-01-01

    Dramatično postignuće medicinske tehnologije transplantacije organa omogućilo je mnogim osobama oštećenih organa da nastave živjeti duljim životom. Prva uspješna transplantacija izvedena je u Bostonu 1954. godine, a pravi proboj transplantacije organa dogodio se tri desetljeća kasnije, nakon otkrića Ciklosporina A koji rješava probleme odbacivanja organa. Danas je moguće transplantirati većinu organa uključujući bubrege, srce, jetru, gušteraču, pluća, kožu i niz tkiva poput koštane srži i rož...