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Sample records for desalacion nuclear utilizando

  1. Determination of the costs of the nuclear desalination using the DEEP code from IAEA; Determinacion de los costos de la desalacion nuclear utilizando el codigo DEEP del OIEA

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez S, J.R.; Palacios H, J.C.; Alonso V, G. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)]. e-mail: jrrs@nuclear.inin.mx

    2005-07-01

    The desalination of seawater is being an important solution to satisfy the demands of drinking water to population's centers that have hydric resources very limited, like it is the case of some Arab countries and arid regions of the planet, in where they have settled desalination plants that use as energy source to those fossil fuels or nuclear energy plants. Taking into account that the desalination of seawater is a process that consumes a lot of thermal and/or electric energy, it is necessary to quantify the costs of the supply and that of the desalination plant for different options and technologies, looking for this way the but appropriate for the specific conditions of the region where it has planned the desalination of seawater. In this report the three technologies but promising for the desalination are described and by means of the DEEP code the costs of production of water and energy are evaluated, using as thermal source different types of power nuclear reactors. It was obtained according to DEEP that the costs of the electricity generation for the considered reactors are around 40 USD/MWh. With these costs of electric power generation and using the DEEP code is obtained that the costs of production of drinking water are around 1 USD/m{sup 3}. (Author)

  2. Nuclear desalination for the northwest of Mexico; Desalacion nuclear para el noroeste de Mexico

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    Ortega C, R. F. [Instituto de Ingenieria, UNAM, 04510 Mexico D.F. (Mexico)

    2008-07-01

    The IMPULSA project of the Engineering Institute of UNAM, it has dedicated from the year 2005 to the study and development of new desalination technologies of seawater with renewable energies. The objective is to form a group of expert engineers and investigators in the desalination topics able to transform their scientific knowledge in engineering solutions, with a high grade of knowledge of the environment and the renewable energies. In the middle of 2007 was took the initiative in the IMPULSA project to study the nuclear desalination topic. It is evident that before the high cost of the hydrocarbons and its high environmental impact, the nuclear generation alternative of energy becomes extremely attractive, mainly for desalination projects of seawater of great size. The Northwest of Mexico is particularly attractive as the appropriate site for one nuclear desalination plant of great size given its shortage of drink water and the quick growth of its population; as well as its level of tourist, agricultural and industrial activity. In this study was revised the state of the art of the nuclear desalination on the world and it is simulated some couplings and operation forms of nuclear reactors and desalination units, from the thermodynamic and economic viewpoint with the purpose of identifying the main peculiarities of this technology. The objective of the study was to characterize several types and sizes of nuclear reactors of the last generation that could be couple to a desalination technology as multi-stage distillation, type flash distillation or inverse osmosis. It is used for this effect the DEEP 3.1 program of the IAEA to simulate the coupling and to carry out an economic preliminary evaluation. Was found cost very competitive of 0.038-0.044 US$/kWh for the electric power production and 0.60 to 0.77 US$/m{sup 3} for the drink water produced, without including the water transport cost or the use of carbon certificates. (Author)

  3. The nuclear energy in the seawater desalination; La energia nuclear en la desalacion de agua de mar

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    Moreno A, J.; Flores E, R.M. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2004-07-01

    In general, the hydric resources of diverse regions of the world are insufficient for to satisfy the necessities of their inhabitants. Among the different technologies that are applied for the desalination of seawater are the distillation processes, the use of membranes and in particular recently in development the use of the nuclear energy (Nuclear Desalination; System to produce drinkable water starting from seawater in a complex integrated in that as much the nuclear reactor as the desalination system are in a common location, the facilities and pertinent services are shared, and the nuclear reactor produces the energy that is used for the desalination process). (Author)

  4. Desalination of seawater with nuclear power reactors in cogeneration; Desalacion de agua de mar con reactores nucleares de potencia en cogeneracion

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    Flores E, R M

    2004-07-01

    The growing demand for energy and hydraulic resources for satisfy the domestic, industrial, agricultural activities, etc. has wakened up the interest to carry out concerning investigations to study the diverse technologies guided to increase the available hydraulic resources, as well as to the search of alternatives of electric power generation, economic and socially profitable. In this sense the possible use of the nuclear energy is examined in cogeneration to obtain electricity and drinkable water for desalination of seawater. The technologies are analysed involved in the nuclear cogeneration (desalination technology, nuclear and desalination-nuclear joining) available in the world. At the same time it is exemplified the coupling of a nuclear reactor and a process of hybrid desalination that today in day the adult offers and economic advantages. Finally, the nuclear desalination is presented as a technical and economically viable solution in regions where necessities of drinkable water are had for the urban, agricultural consumption and industrial in great scale and that for local situations it is possible to satisfy it desalinating seawater. (Author)

  5. Práticas experimentais no ensino de física nuclear utilizando material de baixo custo

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    Cleber Adelar Boff

    2017-05-01

    Full Text Available Uma das dificuldades para o Ensino de Física Moderna é a pouca difusão da experimentação, principalmente para o ensino de Física Nuclear, seja no Ensino Médio ou no Superior.  As atividades sugeridas na literatura geralmente simbolizam o fenômeno real através de simulações. Isso acontece, pois as práticas experimentais, geralmente, envolvem algum tipo de detector de radiação de custo elevado e uma fonte de radiação ionizante que requer cuidados especiais de manuseio e armazenagem, sendo sujeita a regulamentação altamente burocrática no Brasil. O presente trabalho supera estas dificuldades e propõe duas práticas de Física Nuclear experimental utilizando uma câmara de ionização de baixo custo: a medida de filhos do Radônio-222 coletados do ar de ambientes fechados, e a medida do alcance de partículas alfa emitidas pelos filhos do Tório-232 presentes em camisinhas de lampião. O artigo mostra os procedimentos experimentais e os resultados esperados, indicando que as práticas podem servir de suporte para aulas de Física Nuclear.

  6. Multichannel analyzer for nuclear spectrometry with FPGA using Vivado; Analizador multicanal para espectrometria nuclear con FPGA utilizando Vivado

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    Garcia D, A.; Hernandez D, V. M.; Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98060 Zacatecas, Zac. (Mexico); Ordaz G, O. O.; Ibarra D, S. [Universidad de Cordoba, Campus de Rabanales, Carretera Nacional IV, km 396, 14014 Cordoba (Spain); Bravo M, I., E-mail: angelogarciad@hotmail.com [Universidad de Alcala, Departamento de Electronica, Campus Universitario s/n, 28805 Alcala de Henares, Madrid (Spain)

    2017-09-15

    The different applications of ionizing radiation have made this a very significant and useful tool, in turn can be dangerous for living beings if they are exposed to uncontrolled doses. However, due to its characteristics, cannot be perceived by the five senses, in such a way that in order to know the presence of it, radiation detectors and additional devices are required that allow to quantify and classify it. This is the case of the multichannel analyzer that is responsible for separating the different pulse heights that are generated in the detectors, in a certain number of channels; according to the number of bits of the analog to digital converter. The development or conditioning of nuclear technology has increased considerably due to the demand of the applications; therefore this allows developing systems that cover some commercial requirements, cost and volume in relation to the user needs. The objective of the work was to design and implement an intellectual property core (IP Core) which functions as a multichannel analyzer for nuclear spectrometry. For the IP Core design methodology, its components were created in VHDL hardware description language and packaged in the Vivado design suite, making use of resources such as the ARM processor cores that the Zynq chip contains. Likewise, for the first phase of the implementation, the hardware architecture was embedded in the FPGA and the application for the ARM processor was programmed in C language. For the second phase, the management, control and visualization of the results, a virtual instrument was developed in the LabView programming platform. The data obtained as a result of the development and implementation of the IP Core was observed graphically in a histogram that is part of the aforementioned virtual instrument. (Author)

  7. ESTRUCTURA TRIDIMENSIONAL DEL a-CICLOPROPIL- (p-METOXIFENIL-5-PIRIMIDINMETANOL (ANCIMIDOL UTILIZANDO EL MÉTODO DE RESONANCIA MAGNÉTICA NUCLEAR

    Directory of Open Access Journals (Sweden)

    O. Ospina

    2005-12-01

    Full Text Available El Ancimidol, α-ciclopropil-(p-metoxifenil-5-pirimidinmetanol, (C15H16N2O2 es un regulador de crecimiento vegetal sintético, que hace parte del grupo de compuestos heterocíclicos que contienen nitrógeno que inhiben la síntesis de las giberelinas. La estructura de esta molécula se determinó por resonancia magnética nuclear, partiendo de una solución en cloroformo deuterado (CDCl3, utilizando un espectrómetro de 500MHz (campo de 11.7Teslas. Se tomaron espectros unidimensionales RMN 1H, RMN 13C, pruebas DEPT 45, 90 y 135 y espectros bidimensionales HMBC y HMQC. En la estructura obtenida para el Ancimidol, se observaron tres ciclos como son la pirimidina, el metoxifenilo y el ciclopropilo, identi-ficados por la asignación de los átomos de hidrógeno y de carbono y por las relaciones de conectividad dadas por los espectros bidimensionales HMBC y HMQC.

  8. Safety assessment of nuclear medicine practice using the Risk Matrix Method; Evaluaciones de seguridad de la practica de medicina nuclear utilizando el metodo de Matrices de Riesgo

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, Dumenigo; Cruz, Yoanis; Soler, Karen, E-mail: cruz@orasen.co.cu [Centro Nacional de Seguridad Nuclear (CNSN), La Habana (Cuba); Guerrero, Mayka, E-mail: mayka@infomed.sld.cu [Centro de investigaciones Medico Quirurgicas (CIMEQ), La Habana (Cuba)

    2013-10-01

    This paper presents the main results from the application of the methodology of Risk Matrices in a hypothetical service / department of the Nuclear medicine that realize metabolic radiotherapy treatment and diagnostic studies with {sup 131}I and {sup 99} m Tc and {sup 18}F. We could identify major equipment failures and human errors that could potentially lead to a accident in practice. For each analyzed initiating events evaluated the frequency of occurrence, identified key existing defenses to avoid the accident and assessed the potential consequences of an accident if this comes to fruition. With this methodology we could identify which accident sequences increased risk and to propose means to reduce the risk in such cases. As a result of this work was developed the 'RMA Nuclear Medicine' computer tools that will apply this methodology in nuclear medicine services that need to do similar risk assessments.

  9. A nuclear reactor core fuel reload optimization using Artificial-Ant-Colony Connective Networks; Recarga de reatores nucleares utilizando redes conectivas de colonias de formigas artificiais

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    Lima, Alan M.M. de; Schirru, Roberto [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia. Programa de Engenharia Nuclear]. E-mail: alan@lmp.ufrj.br; schirru@lmp.ufrj.br

    2005-07-01

    A Pressurized Water Reactor core must be reloaded every time the fuel burnup reaches a level when it is not possible to sustain nominal power operation. The nuclear core fuel reload optimization consists in finding a burned-up and fresh-fuel-assembly pattern that maximizes the number of full operational days. This problem is NP-hard, meaning that complexity grows exponentially with the number of fuel assemblies in the core. Besides that, the problem is non-linear and its search space is highly discontinual and multimodal. In this work a parallel computational system based on Ant Colony System (ACS) called Artificial-Ant-Colony Networks is introduced to solve the nuclear reactor core fuel reload optimization problem. ACS is a system based on artificial agents that uses the reinforcement learning technique and was originally developed to solve the Traveling Salesman Problem, which is conceptually similar to the nuclear fuel reload problem. (author)

  10. Automatic optimization of a nuclear reactor reload using the algorithm Ant-Q; A otimizacao automatica da recarga nuclear utilizando o algoritmo Ant-Q

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    Machado, Liana; Schirru, Roberto [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia. Programa de Engenharia Nuclear

    2002-07-01

    The nuclear fuel reload optimization is a NP-Complete combinatorial optimization problem. For decades this problem was solved using an expert's knowledge. From the eighties, however there have been efforts to automatic fuel reload and the more recent ones show the Genetic Algorithm's (GA) efficiency on this problem. Following this trend, our aim is to optimization nuclear fuel reload using Ant-Q, artificial theory based algorithms. Ant-Q's results on the Traveling salesman Problem, which is conceptuality similar to fuel reload, are better than GA's. Ant-Q was tested in real application on the cycle 7 reload of Angra I. Comparing Ant-Q result with the GA's, it can be verified that, even without a local heuristics, the former algorithm, as it superiority comparing the GA in Angra I show. Is a valid technique to solve the nuclear fuel reload problem. (author)

  11. Models of signal validation using artificial intelligence techniques applied to a nuclear reactor; Modelos de validacao de sinal utilizando tecnicas de inteligencia artificial aplicados a um reator nuclear

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    Oliveira, Mauro V. [Instituto de Engenharia Nuclear (IEN), Rio de Janeiro, RJ (Brazil); Schirru, Roberto [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia

    2000-07-01

    This work presents two models of signal validation in which the analytical redundancy of the monitored signals from a nuclear plant is made by neural networks. In one model the analytical redundancy is made by only one neural network while in the other it is done by several neural networks, each one working in a specific part of the entire operation region of the plant. Four cluster techniques were tested to separate the entire operation region in several specific regions. An additional information of systems' reliability is supplied by a fuzzy inference system. The models were implemented in C language and tested with signals acquired from Angra I nuclear power plant, from its start to 100% of power. (author)

  12. Modelling of critical functions of nuclear reactors using Fild Programmable Gate Array; Modelagem de funcoes criticas de reatores nucleares utilizando Fild Programmable Gate Array

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    Teixeira, Pamela Iara Nolasco

    2016-07-01

    This paper proposes the development of a method using FPGA for critical security functions of a nuclear reactor. It was implemented two critical safety functions in VHDL, which is a way to describe, through a program, the behavior of a circuit or digital component. Two critical security functions, FCS Core Cooling, responsible for cooling the reactor core in the charts of the plant and also in the event of accidents involving loss of coolant and FCS Heat Transfer, responsible for cooling the reactor core in the event an accident with loss of coolant were implemented. In this Dissertation it was chosen the use of FPGA, because - due to the effects of aging, obsolescence issues, environmental degradation and mechanical failures - nuclear power plants need to replace their older systems by new ones based on digital technology. The technologies obtained using a system described in hardware language can be implemented in a programmable device, having the advantage of changing the code at any time. (author)

  13. Development of an area monitor for neutrons using solid state nuclear track detector; Desenvolvimento de um monitor de area para neutrons utilizando detector solido de tracos nucleares

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    Zahn, G.S.

    1994-12-31

    An area monitor for neutrons composed of the solid state nuclear track detector (SSNTD) Makrofol DE, together with a (n,{alpha}) converter, in the center of a 25 cm diameter polyethylene sphere, is developed. The optimal electrochemical etching conditions for the detection of thermal neutrons by the Makrofol DE using the BN converter are studied, leading to the choice of 55 min, at 30{sup 0} C, under a 44,2 kV.cm{sup -1} electric field with oscillation frequency of 2,0 khz. The response of this system to thermal neutrons, in the optimal conditions, is of 2,76(10)x 10{sup -3} tr/n. Changing from the BN converter to a 2,73(3)g compressed boric acid tablet this value lowers to 3,88(17)x 10{sup -4} tr/n. The performance of the whole monitor in the detection of fast neutrons is examined using the BN converter and neutrons from a {sup 241} Am Be source, with a response of 4,4(2)x 10{sup 3} tr.mSv{sup -1}.cm{sup -2} and operational limits between 7(3){mu}Sv and 5,6(2)mSv. The result of the monitoring of the control room of the IPEN Cyclotron accelerator are also presented as a final test for the viability of the practical use of the monitor. (author). 34 refs, 15 figs, 6 tabs, 1 app.

  14. Probabilistic analysis of safety of a production plant of hydrogen using nuclear energy; Analisis probabilistico de seguridad de una planta de produccion de hidrogeno utilizando energia nuclear

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    Flores F, A. [Facultad de Ingenieria, UNAM, 04510 Mexico D.F. (Mexico); Nelson E, P.F.; Francois L, J.L. [Facultad de Ingenieria, UNAM, Paseo Cuauhnahuac 8532, Jiutepec, Morelos (Mexico)]. e-mail: alain_fyf@yahoo.com

    2005-07-01

    The present work makes use of the Probabilistic Safety analysis to evaluate and to quantify the safety in a plant producer of hydrogen coupled to a nuclear reactor of high temperature, the one which is building in Japan. It is had the description of systems and devices of the HTTR, the pipe diagrams and instrumentation of the plant, as well as the rates of generic faults for the components of the plant. The first step was to carry out a HAZOP study (Hazard and Operability Study) with the purpose of obtaining the initiator events; once obtained these, it was developed a tree of events by each initiator event and for each system it was developed a fault tree; the data used for the quantification of the failure probability of the systems were obtained starting from several generic sources of information. In each tree of events different final states were obtained and it stops each one, their occurrence frequency. The construction and evaluation of the tree of events and of failures one carries out with the SAPHIRE program. The results show the safety of the shutdown system of the HTTR and they allow to suggest modifications to the auxiliary system of refrigeration and to the heat exchanger helium/water pressurized. (Author)

  15. ESTRUCTURA TRIDIMENSIONAL DE LA CITOQUININA N-BENZIL 9 (2 TETRAHIDROPIRANYL ADENINE UTILIZANDO EL MÉTODO DE RESONANCIA MAGNÉTICA NUCLEAR

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    Carlos Rojas

    2004-06-01

    Full Text Available Para comprender la función biológica de las moléculas que conforman los seres vivos es necesario conocer la estructura tridimensional de ellas, pues está comprobado que la función depende más de la distribución espacial que de los mismos componentes. El objetivo del presente trabajo es determinar la estructura de una fitohormona. Uno de los métodos que existen para determinar estas estructuras es la resonancia magnética nuclear pulsada el cual se escogió para este trabajo. Este método se diferencia de la resonancia de onda continua en el hecho de que el campo magnético variable es aplicado en forma de pulsos y su amplitud no puede ser considerada como una perturbación al sistema. La determinación de la estructura exigió la toma de los espectros unidimensionales de H1, C13 y los Distortionless Enhacement by Polarization Transfer (DEPT; este último es una secuencia de pulsos que permite diferenciar entre carbonos unidos a tres, a dos y a un hidrógeno. Con la ayuda del espectro C13 también se pueden distinguir los carbonos que no están enlazados con ningún hidrógeno. Además de éstos, fueron necesarios los siguientes espectros bidimensionales: 1 Heteronuclear Multiple Quantum Correlation (HMQC el cual correlaciona hidrógenos con carbonos que se encuentren enlazados; 2 Heteronuclear Multiple Bond Correlation (HMBC que correlaciona carbonos con hidrógenos que se encuentren a dos o tres enlaces; 3 Correlation Spectroscopy (COSY el cual muestra la correlación entre hidrógenos que se encuentren a dos o tres enlaces; y 4 Nuclear Overhauser Effect Spectroscopy (NOESY el cual correlaciona hidrógenos que distan entre sí menos de 5 Å. A partir de la información obtenida del análisis de estos espectros se dedujo el modelo de la fitohormona que se presenta como resultado del trabajo.

  16. Procedures of hepatic scintigraphy and improvement of professionals by using anthropomorphic simulator object of liver in nuclear medicine; Procedimentos de cintilografia hepatica e aperfeicoamento de profissionais utilizando objeto simulador antropomorfico de figado em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Fernanda C.L.; Cunha, Cledison J.; Dullius, Marcos A.; Souza, Divanizia N., E-mail: divanizi@ufs.b [Universidade Federal de Sergipe (UFS), Aracaju, SE (Brazil)

    2011-10-26

    This paper evaluates hepatic scintigraphy procedures and the possibility of professional improvement in nuclear medicine by using three-dimension anthropomorphic simulators representative of adult human liver. For the conformation of anthropomorphic simulator, it was used gypsum and acrylic. Three simulator objects representing cirrhosis livers. The simulator were filled with {sup 99m}Tc diluted in water for the obtention of scintigraphic images. Tomographic images were analysed posterior and anterior of simulator representing an organ with more cirrhosis grade. It was observed that the simulators make possible the acquisition of images similar to the real images of liver with hepatic cirrhosis. The simulations of hemangiomas can contribute for continuous education of nuclear medicine professionals, as far the question of image formation is concerned, make possible the parameter study as, for example, the , matrix size energy window, zoom and counting statistic

  17. Calculation of neutron activation of control rods of a nuclear reactor, using MCNP5; Calculo de activacion neutronica de barras de control de un reactor nuclear, utilizando MCNP5

    Energy Technology Data Exchange (ETDEWEB)

    Pena V, J.D.

    2016-07-01

    The control rods of a nuclear reactor are activated by neutron irradiation. The generated activity produces a dose around the rod which is irrelevant inside the reactor, but significant when the rod is withdrawn and placed in a storage pool, because this dose is a potential risk to the surrounding personnel. On the other hand, most of the activation occurs in the stainless steel components of the rod. The Monte Carlo model can reliably determine the activation produced in a stainless steel part exposed to a neutron flux in a reactor and the dose measurement around this part. This thesis presents the Monte Carlo models developed for the activation of the control rods of the TRIGA Mark III reactor of Instituto Nacional de Investigaciones Nucleares (ININ) when only standard fuel was available. Therefore, the validations of the Monte Carlo models are reliable. (Author)

  18. Analysis of the scenarios with the participation of nuclear energy in the Mexican electric sector using the Decades program; Analisis de escenarios con la participacion de la energia nuclear en el sector electrico mexicano utilizando el programa DECADES

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    Sosa P, E.; Trejo G, M.G.; Martin del Campo M, C.; Francois L, J.L. [FI-UNAM, 04500 Mexico D.F. (Mexico)] e-mail: edithsosa@hotmail.com

    2003-07-01

    At the moment the energetic planning demands a technical, economic and environmental analysis of the different options of electric generation to be able to find the best solution of supply and energy readiness, already that it is indispensable for the development of the productive activities and to assure the competitiveness of the economy of a country. The expansion analyses of the Mexican Electric Sector its are carried out daily in the Federal Commission of Electricity (CFE) with some programs, among them Decades. However, up to where we have information only there is been considering a type of reactor like candidate being that exist several options that show promising characteristics for what its should be considered in the analyses. With this work its got rich the Decades database of the nuclear power stations that can be used as candidates to consider in the variable system of the expansion studies. Its have been carried out some comparative analysis between two types of nuclear centrals that at the moment offer in the market, specifically the AP600 type PWR reactor of 600 M We and the one BWR with capacity of 1300 M We. Later on it is sought to analyze two or three scenarios of the system of electric generation in Mexico to a term of twenty or twenty-five years. (Author)

  19. Use of self-organizing maps for classification of defects in the tubes from the steam generator of nuclear power plants; Classificacao de defeitos em tubos de gerador de vapor de plantas nucleares utilizando mapas auto-organizaveis

    Energy Technology Data Exchange (ETDEWEB)

    Mesquita, Roberto Navarro de

    2002-07-01

    This thesis obtains a new classification method for different steam generator tube defects in nuclear power plants using Eddy Current Test signals. The method uses self-organizing maps to compare different signal characteristics efficiency to identify and classify these defects. A multiple inference system is proposed which composes the different extracted characteristic trained maps classification to infer the final defect type. The feature extraction methods used are the Wavelet zero-crossings representation, the linear predictive coding (LPC), and other basic signal representations on time like module and phase. Many characteristic vectors are obtained with combinations of these extracted characteristics. These vectors are tested to classify the defects and the best ones are applied to the multiple inference system. A systematic study of pre-processing, calibration and analysis methods for the steam generator tube defect signals in nuclear power plants is done. The method efficiency is demonstrated and characteristic maps with the main prototypes are obtained for each steam generator tube defect type. (author)

  20. A methodology for semiautomatic taxonomy of concepts extraction from nuclear scientific documents using text mining techniques; Metodologia para extracao semiautomatica de uma taxonomia de conceitos a partir da producao cientifica da area nuclear utilizando tecnicas de mineracao de textos

    Energy Technology Data Exchange (ETDEWEB)

    Braga, Fabiane dos Reis

    2013-07-01

    This thesis presents a text mining method for semi-automatic extraction of taxonomy of concepts, from a textual corpus composed of scientific papers related to nuclear area. The text classification is a natural human practice and a crucial task for work with large repositories. The document clustering technique provides a logical and understandable framework that facilitates the organization, browsing and searching. Most clustering algorithms using the bag of words model to represent the content of a document. This model generates a high dimensionality of the data, ignores the fact that different words can have the same meaning and does not consider the relationship between them, assuming that words are independent of each other. The methodology presents a combination of a model for document representation by concepts with a hierarchical document clustering method using frequency of co-occurrence concepts and a technique for clusters labeling more representatives, with the objective of producing a taxonomy of concepts which may reflect a structure of the knowledge domain. It is hoped that this work will contribute to the conceptual mapping of scientific production of nuclear area and thus support the management of research activities in this area. (author)

  1. Thermal fluid dynamics study of nuclear advanced reactors of high temperature using RELAP5-3D; Estudo termofluidodinâmico de reatores nucleares avançados de alta temperatura utilizando o RELAP5-3D

    Energy Technology Data Exchange (ETDEWEB)

    Scari, Maria Elizabeth

    2017-07-01

    Fourth Generation nuclear reactors (GEN-IV) are being designed with special features such as intrinsic safety, reduction of isotopic inventory and use of fuel in proliferation-resistant cycles. Therefore, the investigation and evaluation of operational and safety aspects of the GEN-IV reactors have been the subject of numerous studies by the international community and also in Brazil. In 2008, in Brazil, was created the National Institute of Science and Technology of Innovative Nuclear Reactors, focusing on studies of projects and systems of new generation reactors, which included GEN-IV reactors as well as advanced PWR (Pressurized Water Reactor) concepts. The Department of Nuclear Engineering of the Federal University of Minas Gerais (DEN-UFMG) is a partner of this Institute, having started studies on the GEN-IV reactors in the year 2007. Therefore, in order to add knowledge to these studies, in this work, three projects of advanced reactors were considered to verify the simulation capability of the thermo-hydraulic RELAP5-3D code for these systems, either in stationary operation or in transient situations. The addition of new working fluids such as ammonia, carbon dioxide, helium, hydrogen, various types of liquid salts, among them Flibe, lead, lithium-bismuth, lithium-lead, was a major breakthrough in this version of the code, allowing also the simulation of GEN-IV reactors. The modeling of the respective core of an HTTR (High Temperature Engineering Test Reactor), HTR-10 (High Temperature Test Module Reactor) and LS-VHTR (Liquid-Salt-Cooled Very-High-Temperature Reactor) were developed and verified in steady state comparing the values found through the calculations with reference data from other simulations, when it is possible. The first two reactors use helium gas as coolant and the LS-VHTR uses a mixture of 66% LiF and 34% of BeF{sub 2}, the LiF-BeF{sub 2}, also know as Flibe. All the studied reactors use enriched uranium as fuel, in form of TRISO

  2. Patterns identification in supervisory systems of nuclear reactors installations and gas pipelines systems using self-organizing maps; Identificacao de padroes em sistemas supervisorios de instalacoes de reatores nucleares e em sistemas de gasodutos utilizando mapas auto-organizaveis

    Energy Technology Data Exchange (ETDEWEB)

    Doraskevicius Junior, Waldemar

    2005-07-01

    Self-Organizing Maps, SOM, of Kohonen were studied, implemented and tested with the aim of developing, for the energy branch, an effective tool especially for transient identification in nuclear reactors and for gas pipelines networks logistic supervision, by classifying operations and identifying transients or abnormalities. The digital system for the test was developed in Java platform, for the portability and scalability, and for belonging to free development platforms. The system, executed in personal computers, showed satisfactory results to aid in decision taking, by classifying IRIS (International Reactor Innovative and Secure) reactor operation conditions (data from simulator) and by classifying Southeast (owner: TRANSPETRO - Brazil) gas pipeline network. Various adaptations were needed for such business, as new topologies for the output layer of artificial neural network and particular preparation for the input data. (author)

  3. Applied to neuro-fuzzy models for signal validation in Angra 1 nuclear power plant; Modelos de validacao de sinal utilizando tecnicas de inteligencia artificial aplicados a um reator nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Mauro Vitor de

    1999-06-15

    This work develops two models of signal validation in which the analytical redundancy of the monitored signals from an industrial plant is made by neural networks. In one model the analytical redundancy is made by only one neural network while in the other it is done by several neural networks, each one working in a specific part of the entire operation region of the plant. Four cluster techniques were tested to separate the entire region of operation in several specific regions. An additional information of systems' reliability is supplied by a fuzzy inference system. The models were implemented in C language and tested with signals acquired from Angra I nuclear power plant, from its start to 100% of power. (author)

  4. Caracterização do gel polimérico MAGIC-f para aplicação em medicina nuclear utilizando imagens de ressonância magnética

    OpenAIRE

    Marcelo Menna Barreto Schwarcke

    2013-01-01

    Este trabalho visa aprimorar e tornar mais precisa a utilização do dosímetro gel polimérico MAGIC-f no estudo da distribuição de dose para fonte radioativas utilizadas na terapia e diagnóstico em medicina nuclear. Para isso foram avaliados os parâmetros de leitura do gel em equipamentos de ressonância magnética e sua resposta quando comparado a resultados obtidos através da utilização do código PENELOPE de simulação Monte Carlo. Dentre as incertezas observadas no processo global da utilização...

  5. Ambientes virtuales de aprendizaje utilizando realidad aumentada

    Directory of Open Access Journals (Sweden)

    Diana Nancy Martínez García

    2018-03-01

    Full Text Available Realidad aumentada o Augmented reality es una nueva tecnología que al combinarla con espacios físicos permite ampliar el espectro de la información relacionada con dichos espacios; esto se hace a través de la superposición de imágenes, información o material audiovisual específico aplicado a cualquier área de conocimiento. Los ambientes virtuales de aprendizaje basados en realidad aumentada prometen innovación debido a que transforman los escenarios de aprendizaje real mediante el uso de nuevas tecnologías aplicadas al ámbito educativo, complementando de esta manera la percepción e interacción con el mundo real; logrando el acceso a nuevos contenidos prescindiendo de recursos físicos. En cuanto al uso de la realidad aumentada aplicada al área de enfermería, existe un sinnúmero de herramientas para complementar una clase magistral y enriquecer el proceso de aprendizaje. Sin embargo, la mayoría de los desarrollos realizados utilizando realidad aumentada proviene de contextos diferentes al nuestro, por lo que resulta importante fomentar el uso de este tipo de herramientas para que suscite el interés de los desarrolladores locales de tecnologías aplicadas al ámbito educativo y más específicamente el de salud. El objetivo de la presente revisión fue fundamentar teóricamente acerca de los ambientes virtuales de aprendizaje utilizando aplicaciones basadas en realidad aumentada.

  6. Study of reliability for the electricity cogeneration and seawater desalination in the Northwest of Mexico; Estudio de factibilidad para la cogeneracion de electricidad y desalacion de agua de mar en el noroeste de Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez U, G. O.; Ortega C, R. F. [UNAM, Instituto de Ingenieria, 04510 Mexico D.F. (Mexico)]. email: exergiovanni@gmail.com

    2008-07-01

    The IMPULSA project of the Engineering Institute of UNAM, it has dedicated from the year 2005 to the study and development of new desalination technologies of seawater with renewable energies. The objective is to form a group of expert engineers and investigators in the desalination topics able to transform their scientific knowledge in engineering solutions, with a high grade of knowledge of the environment and the renewable energies. In the middle of 2007 was took the initiative in the IMPULSA project to study the nuclear desalination topic by its characteristics of zero gas emissions of greenhouse effect, competitive costs in the generation, operative experience and safety of the nuclear reactors, resulting attractive mainly for the desalination projects of seawater of great size. The Northwest of Mexico is particularly attractive as the appropriate site for one nuclear desalination plant of great size given its shortage of drink water and the quick growth of its population; as well as its level of tourist, agricultural and industrial activity. In this study was analyzed from a thermodynamic viewpoint, mentioning the economic aspect, the nuclear desalination according to the world experience; they were simulated some couplings and operation forms of nuclear reactors and desalination units, was made emphasis in one particularly. The objective of the study was to characterize several types and sizes of nuclear reactors of the last generation that could be coupled to a desalination technology as multi-stage distillation, type flash distillation or inverse osmosis. Specially and topic of this article, it is studied a case of the IRIS reactor of 335 MW{sub e} coupled to a MED station of nominal capacity of 140,000 m{sup 3}/day. It is utilized for this effect the DEEP 3.1 program of the IAEA to simulate the coupling and to carry out a thermodynamic and economic preliminary evaluation, as well as the THERMOFLEX simulator to reinforce and to compare the thermodynamic

  7. Spatial distribution of the radon concentration in soil and subterranean water in the Nuclear Center of Mexico and its surrounding using a geographical information system; Distribucion espacial de la concentracion de radon en suelo y agua subterranea en el Centro Nuclear de Mexico y sus alrededores utilizando un sistema de informacion geografica

    Energy Technology Data Exchange (ETDEWEB)

    Cardenas, S.; Pena, P.; Lopez, M.B.E.; Balcazar, M. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico); Madrigal, D. [UAEM, Facultad de Geografia, 50000 Toluca, estado de Mexico (Mexico)

    2003-07-01

    The radon concentration in soil of the Nuclear Center of Mexico using solid detectors of nuclear traces (LR 115, type ll) and in water of two aquifers of the Asuncion Tepexoyuca, by means of the liquid scintillation technique it was determined; both places located in the Ocoyoacac municipality, Estado de Mexico. The analysis of spatial distribution it was supported by means of a Geographic Information System. The results of the radon concentration in soil, they registered an average of 2. 64 kBq m{sup -3} in the study area, the more high average value it was of 5. 25 kBq m{sup -3} in the station 12-ZM (Military Area) and the minimum value was of 0. 54 kBq m{sup -3} in the point 7-CO (Dining room). In the radon concentration in water of La Perita it was observed an average value 0.52 Bq L{sup -1} and in El Tunel it was of 0.7 Bq L{sup -1}. (Author)

  8. Preliminary risk analysis of an Hydrogen production plant using the reformed process of methane with vapor coupled to a high temperature nuclear reactor; Analisis preliminar de riesgo de una planta de produccion de hidrogeno utilizando el proceso de reformado de metano con vapor acoplada a un reactor nuclear de alta temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Flores y Flores, A. [Facultad de Ingenieria, UNAM, 04510 Mexico D.F. (Mexico)]. E-mail: alain_fyf@yahoo.com; Nelson E, P.F.; Francois L, J.L. [Facultad de Ingenieria, Laboratorio de Analisis en Ingenieria de Reactores Nucleares, UNAM, Paseo Cuauhnahuac 8532, 62550 Jiutepec, Morelos (Mexico)

    2004-07-01

    It is necessary to identify the different types of dangers, as well as their causes, probabilities and consequences of the same ones, inside plants, industries and any process to classify the risks. This work is focused in particular to a study using the technical HAZOP (Hazard and Operability) for a plant of reformed of methane with vapor coupled to a nuclear reactor of the type HTTR (High Temperature Test Reactor), which is designed to be built in Japan. In particular in this study the interaction is analyzed between the nuclear reactor and the plant of reformed of methane with vapor. After knowing the possible causes of risk one it is built chart of results of HAZOP to have a better vision of the consequences of this faults toward the buildings and constructions, to people and the influence of the fault on each plant; for what there are proposed solutions to mitigate these consequences or to avoid them. The work is divided in three sections: a brief introduction about the technique of HAZOP; some important aspects of the plant of reformed of methane with vapor; and the construction of the chart of results of HAZOP. (Author)

  9. Experimental and numerical investigation of water flow through spacer grids of nuclear fuel elements using the Open FOAM code; Investigação numérica e experimental do escoamento de água através de grades espaçadoras de elementos combustíveis nucleares utilizando o código OpenFOAM

    Energy Technology Data Exchange (ETDEWEB)

    Vidal, Guilherme A.M.; Vieira, Tiago A.S.; Castro, Higor F.P., E-mail: gvidal.ufmg@gmail.com, E-mail: tiago.vieira.eng@gmail.com, E-mail: higorfabiano@hotmail.com [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Dept. de Engenharia Mecânica; Santos, André A.C. dos; Silva, Vitor V. A.; Barros Filho, José A., E-mail: aacs@cdtn.br, E-mail: vitors@cdtn.br, E-mail: jabf@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2017-07-01

    With the advancement and development of computational tools, the studies of thermofluidodynamic behavior in nuclear fuel elements have been developed in recent years. Of the devices present in these elements, the spacing grids received more attention. They have kept the fuel rods equally spaced and have fins that aim to improve the heat transfer process between the water and the fuel element. Therefore, the grids present an important structural and thermal function. This work was carried out with the purpose of verifying and validating simulations of spacer grids using OpenFOAM (2017) software of Computational Fluid Dynamics (CFD). The simulations were validated using results obtained through the commercial CFD program, Ansys CFX, and experiments available in the literature and obtained in test sections assembled on the Water-Air Circuit (CCA) of the CDTN thermo-hydraulic laboratory.

  10. Nuclear

    International Nuclear Information System (INIS)

    2014-01-01

    This document proposes a presentation and discussion of the main notions, issues, principles, or characteristics related to nuclear energy: radioactivity (presence in the environment, explanation, measurement, periods and activities, low doses, applications), fuel cycle (front end, mining and ore concentration, refining and conversion, fuel fabrication, in the reactor, back end with reprocessing and recycling, transport), the future of the thorium-based fuel cycle (motivations, benefits and drawbacks), nuclear reactors (principles of fission reactors, reactor types, PWR reactors, BWR, heavy-water reactor, high temperature reactor of HTR, future reactors), nuclear wastes (classification, packaging and storage, legal aspects, vitrification, choice of a deep storage option, quantities and costs, foreign practices), radioactive releases of nuclear installations (main released radio-elements, radioactive releases by nuclear reactors and by La Hague plant, gaseous and liquid effluents, impact of releases, regulation), the OSPAR Convention, management and safety of nuclear activities (from control to quality insurance, to quality management and to sustainable development), national safety bodies (mission, means, organisation and activities of ASN, IRSN, HCTISN), international bodies, nuclear and medicine (applications of radioactivity, medical imagery, radiotherapy, doses in nuclear medicine, implementation, the accident in Epinal), nuclear and R and D (past R and D programmes and expenses, main actors in France and present funding, main R and D axis, international cooperation)

  11. Portal WEB 2.0. utilizando Framework Struts

    OpenAIRE

    Palacín Mateo, Manuel

    2007-01-01

    El propósito de este proyecto es la implementación de un portal interactivo de contactos utilizando las tecnologías J2EE mediante Struts y siguiendo la tendencia Web 2.0. Previo a esta implementación se ha hecho una valoración del mercado actual de los portales de contactos y se han evaluado los servicios que ofrecen para posteriormente añadirlos a la demostración tecnológica. Tras esto se ha explicado lo que es la tendencia Web 2.0. Finalmente se han evaluado las diferentes opciones o tec...

  12. Nuclear

    International Nuclear Information System (INIS)

    Anon.

    2000-01-01

    The first text deals with a new circular concerning the collect of the medicine radioactive wastes, containing radium. This campaign wants to incite people to let go their radioactive wastes (needles, tubes) in order to suppress any danger. The second text presents a decree of the 31 december 1999, relative to the limitations of noise and external risks resulting from the nuclear facilities exploitation: noise, atmospheric pollution, water pollution, wastes management and fire prevention. (A.L.B.)

  13. Nuevo criterio de complejidad utilizando una medida de eficiencia

    OpenAIRE

    Munduate del Río, Arantza; Pérez Prados, Antonio; Cano Sevilla, Francisco J.

    1995-01-01

    Centrado en el campo de los árboles de decisión, este trabajo estudia la forma de selección de un árbol óptimo entre los posibles árbo1es obtenidos a partir del análisis de un conjunto de datos, utilizando para ello una cantidad criterio que combina linealmente dos medidas de la calidad de un árbol: el error de resustitución y la eficiencia. Analizando el efecto de un proceso de poda en la cantidad criterio se obtiene una sucesión finita de subárboles rnínimos óptimamente podados del árbol má...

  14. REFRIGERAÇÃO UTILIZANDO PASTILHAS DE EFEITO PELTIER

    Directory of Open Access Journals (Sweden)

    Antonio Luiz P. S. Campos

    2010-06-01

    Full Text Available Pastilhas de Peltier são dispositivos baseados no efeito Peltier e são aplicadas para produzir efeito refrigerador ou aquecedor. Este trabalho aborda conceitos envolvidos na fabricação e funcionamento desses dispositivos tais como: histórico do efeito Peltier e desenvolvimento de placas de efeito Peltier. É feito um estudo de eficiência da refrigeração de água utilizando uma placa de efeito Peltier existente no Campus Natal – Zona Norte. Para isso, é implementada uma estrutura de refrigeração de água e são feitas medições para determinar a eficiência de sistema. Por fim, são apresentadas conclusões sobre o estudo desenvolvido.

  15. Design and simulation of a process of seawater desalination (MED) using the residual heat of a PBMR nuclear power plant; Diseno y simulacion de un proceso de desalinizacion de agua de mar (MED) utilizando el calor residual de una planta nucleoelectrica PBMR

    Energy Technology Data Exchange (ETDEWEB)

    Valle H, Julio; Morales S, J.B. [UNAM, DEPFI Campus Morelos, Jiutepec, Morelos (Mexico)]. e-mail: jms0620@yahoo.com

    2008-07-01

    In the present work it is demonstrated as the thermodynamic recuperative Brayton cycle with which operates a nuclear power plant type PBMR (Pebble Bed Modular Reactor) it allows to use the residual heat, removed in the coolers of the compression stage of the system, to produce vapor and to desalt seawater. The desalination process selected, starting from its operation characteristics and the derived advantages of them using nuclear heat, it the one of Multi-Effect Distillation, MED for its abbreviations in English, which described and it is justified to detail. This distillation process widely studied, allows us to use water vapor pressurized to temperatures between 70 and 110 C like energy source to evaporate the seawater in the first stage or effect of the process. The relatively low temperatures with which the vapor takes place of feeding to the process is it makes to the plant PBMR ideal for desalination of seawater, since does not require majors modifications to its design its operation, and on the contrary it allows to use the heat that previously was rejected, to produce the vapor. In this work an unit MED of six effects is designed, which undergoes a successive fall of pressure in each of them. Once obtained the agreed design to the conditions of operation of PBMR plant, it was model mathematically the MED process, including the coupling stage with the reactor coolers. The mathematical model was obtained by means of differential equations of mass balance and energy in the system, and with this it was implemented in SIMULINK a model equivalent to the MED process which is interconnected to the simulator coolers of the PBMR plant, constructed previously. One ran the program being obtained the results that are reported at the end of this article. (Author)

  16. Diseño e implementación de un sitio web utilizando Drupal 7

    OpenAIRE

    PONS TUR, MARÍA JOSÉ

    2012-01-01

    En el presente proyecto se mostrará el diseño e implementación de un sitio web utilizando Drupal 7. El proyecto será una página web de un gimnasio llamado Nova Forme, con la finalidad de tener al alcance toda la información de todos los servicios de belleza ofrecidos por el gimnasio, informaciones de todas las actividades y horarios impartidas en el gimnasio, e información de las entradas del hammam entre otras. Pons Tur, MJ. (2012). Diseño e implementación de un sitio web utilizando Drupa...

  17. MODELAGEM DE PROCESSOS UTILIZANDO O BPMN NA FACULDADE CATÓLICA RAINHA DO SERTÃO

    Directory of Open Access Journals (Sweden)

    Antonio Neuton da Silva Júnior

    2014-06-01

    Full Text Available O presente artigo apresenta o gerenciamento de negócios por processos, suas perspectivas atuais, suas vantagens, o desenvolvimento do projeto Modelagem de Processos utilizando BPMN implementado na Faculdade Católica Rainha do Sertão, as ferramentas utilizadas no projeto, a metodologia e os resultados obtidos a partir do mesmo. Ainda foi descrito os setores utilizados, a modelagem resultante das pesquisas e entrevistas e as sugestões para as melhorias dos processos modelados.

  18. Tratamiento del lactosuero utilizando la técnica de electrodiálisis

    OpenAIRE

    Ávila G., Rita M.; Medina, Ana Luisa; Cadenas A., Reinaldo A.

    2006-01-01

    Tratamiento del lactosuero utilizando la técnica de electrodiálisis (Ávila G., Rita M.; Cadenas A., Reinaldo A. y Medina, Ana Luisa) Resumen El lactosuero es un subproducto de la elaboración de quesos y mantequillas. Este subproducto contiene una cantidad importante de proteínas y calcio, entre otros componentes, que hacen atractivo su tratamiento con el objeto de adecuarlo para su comercialización directa o para elaborar bebidas lácteas. Los sueros ácidos y/o salados no son ap...

  19. Desarrollo de apio minimamente procesado fortificado con vitamina e, utilizando la ingenieria de matrices

    OpenAIRE

    MARTELO CASTAÑO, YISELL JOHAN; CORTES RODRIGUEZ, MISAEL; SUAREZ MAHECHA, HÉCTOR

    2011-01-01

    El objetivo de este trabajo fue desarrollar un producto minimamente procesado fortificado con vitamina E, a partir de apio (Apium graveolens L. var.dulce), utilizando la ingenieria de matrices como metodologia de obtencion de alimentos funcionales. Trozos de apio impregnados al vacio con dl¿¿tocoferol acetato emulsificado en una solucion isotonica al vegetal de NaCl, 1,2%, fueron evaluados en funcion del tiempo de almacenamiento y el envasado (con y sin vacio), en terminos de la cuantificacio...

  20. Polpação de palha de milho, utilizando-se diferentes processos organosolv

    OpenAIRE

    Maria Lucia Bianchi

    1995-01-01

    Resumo: A disponibilidade de palha de milho e a crescente procura de matérias primas alternativas que substituam a madeira na fabricação de papel, levaram à investigação da possibilidade de polpação da palha de milho, utilizando-se diferentes processos Organosolv. A palha de milho foi analisada, apresentando cerca de 13% de umidade, 1% de cinzas, 7% de extrativos, 24% de lignina Klason, 54% de celulose e 16% de polioses (por diferença), com um total de 71% de holocelulose. A análise elementar...

  1. MODELO DE BLOQUES PARA UN YACIMIENTO DE SULFUROS MASIVOS UTILIZANDO EL SOFTWARE MINESIGHT®

    OpenAIRE

    SEPÚLVEDA SEPÚLVEDA, GIOVANNI FRANCO; GALLO SIERRA, ADRIÁN FELIPE

    2011-01-01

    El objetivo de este trabajo es definir un modelo de bloques de un yacimiento hipotético de sulfuros masivos utilizando MineSight®, basado en la interpretación geológica, la viabilidad, planificación estratégica y la programación de los procesos a largo y corto plazo de las alternativas de producción y la capacidad requerida de la mina. Primero se presentan una descripción de los software minero más representativos del mercado en cuanto a la planeación minera, después se presentan las generali...

  2. Modelo de bloques para un yacimiento de sulfuros masivos utilizando el software minesight®

    OpenAIRE

    Franco Sepúlveda, Giovanni; Gallo Sierra, Adrián Felipe

    2012-01-01

    El objetivo de este trabajo es definir un modelo de bloques de un yacimiento hipotético de sulfuros masivos utilizandoMineSight®, basado en la interpretación geológica, la viabilidad, planificación estratégica y la programación de los procesosa largo y corto plazo de las alternativas de producción y la capacidad requerida de la mina.Primero se presentan una descripción de los software minero más representativos del mercado en cuanto a la planeación minera, después se presentan las generalidad...

  3. ESTIMACIÓN DE LA CARGA DE TRANSFORMADORES DE POTENCIA UTILIZANDO UNA RED NEURONAL ARTIFICIAL

    OpenAIRE

    Agudelo, Laura; Velilla, Esteban; López, Jesús M

    2014-01-01

    En este artículo se presenta una metodología para estimar la curva de carga de transformadores de potencia utilizando redes neuronales artificiales. Para implementar la metodología propuesta se utilizaron datos reales de dos transformadores ubicados en diferentes zonas geográficas y con diferentes condiciones de operación. La técnica de estimación de carga fue implementada con datos históricos de la empresa Interconexión Eléctrica S.A (ISA). Para realizar la predicción de las curvas de carga ...

  4. educARción: Desarrollo de Herramientas para el Aprendizaje Utilizando Realidad Aumentada

    OpenAIRE

    Guerrero Juk, Julián

    2013-01-01

    Se presenta un sistema para apoyar en la enseñanza de balanceo de ecuaciones químicas sencillas utilizando realidad aumentada (AR). El sistema combina elementos físicos con gráficos sintéticos para hacer tangible un proceso abstracto, y así permitir que el alumno experimente directamente el proceso de balanceo de ecuaciones, en contraste con métodos tradicionales que utilizan ecuaciones escritas en papel. Dado que el equipo que se propone para su implementación (visores, HMD) no es de uso com...

  5. Sugestões de práticas de ensino de geometria utilizando origami modular

    OpenAIRE

    Marília Pelinson Tridapalli

    2017-01-01

    O presente trabalho contém sugestões de práticas de ensino, utilizando o origami modular, que podem ser aplicadas nas aulas de geometria do Ensino Fundamental. As práticas foram desenvolvidas de maneira que o professor possa enriquecer suas aulas gastando pouco tempo no preparo, e apresentam objetos manipuláveis que tornam o processo de ensino-aprendizagem mais atrativo e significativo. Apresentamos todo o processo de elaboração dos módulos e seus respectivos encaixes para a construção, usand...

  6. Degradação de poliolefinas utilizando catalisadores zeolíticos

    OpenAIRE

    Valle,Maria Letícia M.; Guimarães,Maria José O. C.; Sampaio,Cristiane M. S.

    2004-01-01

    Neste trabalho foi estudada a degradação de alguns dos principais constituintes dos rejeitos plásticos (polietileno de alta densidade (HDPE), polietileno de baixa densidade (LDPE) e polipropileno (PP)), empregando-se um catalisador exausto de unidades de craqueamento de fluidos (FCC) e um catalisador zeolítico (ADZ3) sintetizado em laboratório. Utilizando técnicas de termogravimetria (TG-DTG) e cromatografia gasosa (CG), foi possível avaliar os produtos gerados no craqueamento destas poliolef...

  7. Sistemas microfluídicos amperométricos utilizando enzimas imobilizadas

    OpenAIRE

    Luís Marcos Cerdeira Ferreira

    2011-01-01

    Este trabalho descreve o desenvolvimento de um sistema microfluídico, contendo, como componente principal, um reator enzimático constituído de um microcanal fabricado em substrato de poli(metacrilato de metila) e um sistema amperométrico como detector. Para a construção de microcanais foi utilizando equipamento de usinagem a laser de CO2 para escavar os microcanais, que a seguir foram selados termicamente. A superfície interna desse microcanal foi submetida à modificação química com poli(etil...

  8. Produção de hidromel utilizando mel de Melipona scutellaris

    OpenAIRE

    Peixoto, Samira; Carvalho, Carlos Alfredo; Estevinho, Leticia M.

    2014-01-01

    Atualmente, existe uma crescente procura de bebidas fermentadas por parte dos consu-midores, particularmente de hidromel, produzido empiricamente desde a antiguidade. De acordo com a literatura, este bebida tem excelentes efeitos na digestão e metabolismo e é benéfico para doentes com anemia crónica e doenças do trato gastrointestinal [1].Esta bebida é geralmente produzida utilizando mel de Apis mellifera, no entanto, no Brasil existe também mel de abelhas sem ferrão, como Melipona scutellaris...

  9. Análisis de paneles solares térmicos utilizando software gratuito

    OpenAIRE

    Castellanos Cordeiro-Crespo, Antonio

    2009-01-01

    El objetivo de este proyecto es la evaluación de dos programas que trabajan en la simulación de paneles termosolares: KOLEKTOR Y CODEPRO. Para la valoración de dichos software tomaremos datos en el panel solar con el que cuenta la Universidad Politécnica de Cracovia. Después simularemos, utilizando las aplicaciones a estudio, introduciendo las mismas condiciones de la toma de datos, y compararemos los resultados obtenidos en ambos procedimientos. Lo más positivo es que ambos software son bast...

  10. Síntese enzimática de ascorbil oleato utilizando tecnologias alternativas

    OpenAIRE

    Balen, Manuela

    2016-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Alimentos, Florianópolis, 2016. A produção enzimática de ascorbil oleato utilizando como substratos Lascórbico e ácido oleico necessita da total solubilização entre substratos a fim de se obter maiores rendimentos. Contudo, o ácido L-ascórbico e ácido oleico não são totalmente miscíveis por possuírem polaridades bastante distintas. Assim, este trabalho objetivou bus...

  11. Control de velocidad de un motor de inducción utilizando un controlador Fuzzy

    Directory of Open Access Journals (Sweden)

    Madelín Lima Álvarez

    2011-03-01

    Full Text Available Se realiza la simulación del sistema de control de velocidad del motor de inducción. Se parte del enfoquevectorial y de un sistema de coordenadas adecuado a su futura utilización, utilizando para esto el lenguaje desimulación de sistemas dinámicos Simulink. En cuanto a la simulación del método de control vectorial porcampo orientado se ha empleado el denominado método de control vectorial indirecto. El control de la velocidaddel motor se simuló utilizando un controlador Fuzzy, comparándose posteriormente estos resultados con losobtenidos mediante la utilización de un controlador PI digital.  This work carries out the simulation of speed control of induction motor. It is based on the field orientation theoryand on a system of coordinates adapted to its future use. The language that has been used for the simulation ofdynamics systems is Simulink. The indirect method of the field orientation control theory was used in themathematical analysis of the induction motor. The speed control of the induction motor was simulated using aFuzzy controller and these results were compared with those obtained by means of the use of a PI digitalcontroller.

  12. Nuclear law - Nuclear safety

    International Nuclear Information System (INIS)

    Pontier, Jean-Marie; Roux, Emmanuel; Leger, Marc; Deguergue, Maryse; Vallar, Christian; Pissaloux, Jean-Luc; Bernie-Boissard, Catherine; Thireau, Veronique; Takahashi, Nobuyuki; Spencer, Mary; Zhang, Li; Park, Kyun Sung; Artus, J.C.

    2012-01-01

    This book contains the contributions presented during a one-day seminar. The authors propose a framework for a legal approach to nuclear safety, a discussion of the 2009/71/EURATOM directive which establishes a European framework for nuclear safety in nuclear installations, a comment on nuclear safety and environmental governance, a discussion of the relationship between citizenship and nuclear, some thoughts about the Nuclear Safety Authority, an overview of the situation regarding the safety in nuclear waste burying, a comment on the Nome law with respect to electricity price and nuclear safety, a comment on the legal consequences of the Fukushima accident on nuclear safety in the Japanese law, a presentation of the USA nuclear regulation, an overview of nuclear safety in China, and a discussion of nuclear safety in the medical sector

  13. Detección de fraude bancario en tiempo real utilizando tecnologías de procesamiento distribuido

    OpenAIRE

    Mansilla Montero, Javier

    2016-01-01

    En este Trabajo de Fin de Máster se desarrollará un sistema de detección de fraude en pagos con tarjeta de crédito en tiempo real utilizando tecnologías de procesamiento distribuido. Concretamente se considerarán dos tecnologías: TIBCO, un conjunto de herramientas comerciales diseñadas para el procesamiento de eventos complejos, y Apache Spark, un sistema abierto para el procesamiento de datos en tiempo real. Además de implementar el sistema utilizando las dos tecnologías propuestas, un objet...

  14. Aproximaciones al valor de la integral definida utilizando una calculadora graficadora

    OpenAIRE

    Ansola, Esther; Rodríguez, Eugenio Carlos; Hernández, Nelson; Gómez, Pablo Ignacio; Alfonso, Débora Oliva; Sánchez, Danelia

    2008-01-01

    Este trabajo muestra una experiencia llevada a cabo con un grupo de estudiantes de primer año de ingeniería a través de un curso facultativo en el que se retomó el cálculo de integrales definidas, utilizando la tecnología, con el propósito de:• Consolidar el concepto de integral definida a través de su definición y de su interpretación geométrica. • Mostrar otras formas de calcular una integral definida mediante aproximaciones numéricas y su interpretación geométrica. El recurso tecnológic...

  15. Projeto de acopladores ópticos utilizando algoritmo genético

    OpenAIRE

    Jaqueline Oliveira Zampronio

    2016-01-01

    Resumo: Este projeto é uma proposta de um novo acoplador óptico para a aplicação em circuitos ópticos integrados. O dispositivo foi desenvolvido utilizando o método dos elementos finitos vetorial 3D associado com o algoritmo genético e leva em consideração guias de onda com diferentes altura, largura e índices de refração. O comprimento total do acoplador óptico é de apenas 4,22 µm e o seu funcionamento é baseado em pequenos segmentos cilíndricos que interferem na propagação da onda eletromag...

  16. Projeto e desenvolvimento de um carro robô controlado por smartphone, utilizando a plataforma Amarino

    Directory of Open Access Journals (Sweden)

    Otávio Souza Martins Gomes

    2015-01-01

    Full Text Available Este artigo mostra a construção de um carro robô controlado por dispositivos móveis utilizando o sistema operacional Android e uma placa de prototipagem open source (Arduino. Utilizou-se de motores para sua movimentação e sensores para interação com o ambiente. O envio de comandos foi realizado utilizando a tecnologia Bluetooth e é capaz de movimentar o carro robô em todas as direções de acordo com os comandos do usuário. Sensores instalados no carro coletam informações do ambiente que são enviadas ao dispositivo Android. A construção bem sucedida deste carro robô mostra que é possível implementar novas funcionalidades para esse produto, bem como apoiar outros projetos relacionados a esse tema.Palavras-chave: Arduino. Android. Bluetooth. Carro robô. Robótica. Project and development of a robot car controlled by smartphone, using the platform amarinoABSTRACTThis work shows the build of a robot car controlled by mobile devices employing Android operating system and an open source prototyping board (Arduino. Motors for its movements and sensors for its environment interaction were employed. The commands are transmitted using Bluetooth technology which can move the robot car in all directions according to the user commands. Sensors installed in the car collect the environment information which is sent to the Android device. The success build of this robot car shows that new features can be possible implemented as well as to support other projects related to this research area.Keywords: Arduino. Android. Bluetooth. Robot car. Robotic.

  17. Diseño de multiplicador de 64 bits utilizando la técnica de barrido superpuesto

    OpenAIRE

    Montalvo Ramírez, Luis

    1987-01-01

    Se presenta el desarrollo del novel algoritmo de multiplicación por barrido superpuesto de 3-bits, así como también los aspectos importantes del diseño de la arquitectura, redes lógicas y layout de un multiplicador de 64-bits utilizando como caso de estudio.

  18. La resolución de problemas geométricos en Matemática utilizando la computadora

    Directory of Open Access Journals (Sweden)

    Osmany Guzmán-Simón

    2017-11-01

    Full Text Available Se presenta un análisis donde se plantean los fundamentos psicopedagógicos que sustentan el desarrollo de habilidades en la resolución de problemas geométricos en la asignatura Matemática, utilizando la computadora.

  19. Tri generation with combined cycle, HVAC and desalinisation; Trigeneracion con ciclo combinado, climatizacion y desalacion

    Energy Technology Data Exchange (ETDEWEB)

    Cuviella Suarez, C.

    2008-07-01

    The current need of mankind to seek for new ways of efficient usable controllable energy production from the economic and environmental points of view is obvious. The current trend towards renewable energies, states this fact though it is not the definitive solution. This is why a fundamental step in saving energy is to prevent any misuse or unnecessary energy consumption. Co-generation, with all its variants, is an answer to this problem through the use of the residual thermal energy within electrical production as an usable product instead of as waste to be dissipated in a thermodynamic cooling process in an approximate ratio of 2:1. The basis of the approach is to optimize the management of thermal energy produced during electricity generation to prevent other fuel firing consumptions which can be assumed as heating, air conditioning, desalinisation, industrial processes, etc. The profusion of tinstallations of this kind would imply a gross saving of 60% of the general primary fuel(Author)

  20. Nuclear Medicine

    Science.gov (United States)

    ... Parents/Teachers Resource Links for Students Glossary Nuclear Medicine What is nuclear medicine? What are radioactive tracers? ... funded researchers advancing nuclear medicine? What is nuclear medicine? Nuclear medicine is a medical specialty that uses ...

  1. Nuclear safety. Seguranca nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Aveline, A [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Fisica

    1981-01-01

    What is nuclear safety Is there any technical way to reduce risks Is it possible to put them at reasonable levels Are there competitiveness and economic reliability to employ the nuclear energy by means of safety technics Looking for answers to these questions the author describes the sources of potential risks to nuclear reactors and tries to apply the answers to the Brazilian Nuclear Programme. (author).

  2. Avaliacao da Relacao entre a Doenca Hepatica Nao Gordurosa e CAD utilizando TCMF

    Directory of Open Access Journals (Sweden)

    Duran Efe

    2014-01-01

    Full Text Available Fundamento: Alguns fatores de risco para a aterosclerose são acompanhados pela doença hepática gordurosa não alcoólica (DHGNA. Desejamos usar a tomografia computadorizada multi-fatias (TCMF como a técnica para encontrar relação entre a DHGNA e a doença arterial coronariana (DAC. Objetivo: A relação entre a DHGNA e a DAC foi investigada através de TCMF. Métodos: Um total de 372 indivíduos com ou sem sintomas cardíacos, que foram submetidos à angiografia por TCMF, foram incluídos no estudo. Os pacientes foram divididos em dois grupos, de acordo com a presença da DHGNA. Os segmentos arteriais coronarianos foram avaliados visualmente via angiografia por TCMF. Com base no grau de estenose arterial coronariana, aqueles com placas ausentes ou mínimas foram considerados como normais, enquanto aqueles que apresentavam estenose de menos do que 50% e no mínimo uma placa foram considerados como portadores da doença arterial coronariana não obstrutiva (não-obsDAC. Os pacientes que apresentaram no mínimo uma placa e estenose arterial coronariana de 50% ou mais foram considerados como portadores de doença arterial coronariana obstrutiva (obsDAC. A DHGNA foi determinada de acordo com o protocolo de TCMF, utilizando a densidade hepática. Resultados: De acordo com a densidade hepática, o número de pacientes com doença hepática gordurosa não alcoólica (grupo 1 foi de 204 (149 homens, 54,8% e com fígado normal (grupos 2 foi de 168 (95 homens, 45.2%. Houve 50 (24,5% não-obsDAC e 57 (27,9% casos de obsDAC no Grupo 1, e 39 (23,2% não-obsDAC e 23 (13,7% casos de obsDAC no Grupo 2. Conclusões: O presente estudo utilizando TCMF demonstrou que a frequência da doença arterial coronariana em pacientes com NAFDL foi significativamente superior do que nos pacientes em NAFDL.

  3. Invisible nuclear; converting nuclear

    International Nuclear Information System (INIS)

    Park, Jongmoon

    1993-03-01

    This book consists of 14 chapters which are CNN era and big science, from East and West to North and South, illusory nuclear strategy, UN and nuclear arms reduction, management of armaments, advent of petroleum period, the track of nuclear power generation, view of energy, internationalization of environment, the war over water in the Middle East, influence of radiation and an isotope technology transfer and transfer armament into civilian industry, the end of nuclear period and the nuclear Nonproliferation, national scientific and technological power and political organ and executive organ.

  4. Monitoramento do processo de compressão de ibuprofeno utilizando controle estatístico

    Directory of Open Access Journals (Sweden)

    Sara Elis Bianchi

    2012-04-01

    Full Text Available O Controle Estatístico de Processo (CEP é uma ferramenta bastante utilizada para auxiliar no controle da qualidade de parâmetros físicos como peso médio, dureza e friabilidade. Através das cartas de controle é possível detectar desvios dos parâmetros do processo, reduzindo a quantidade de produtos fora da especificação e, consequentemente, os custos da produção. A avaliação de trinta lotes de ibuprofeno em uma indústria farmacêutica, utilizando controle estatístico de processo, permitiu o fornecimento de informações imprescindíveis para a investigação detalhada dos pontos críticos do processo, diagnosticando as possíveis não conformidades na etapa de compressão deste fármaco. Desta maneira, podem-se propor atividades de melhoria, através da identificação e eliminação das causas especiais de variação no processo, com a finalidade de produzir comprimidos com qualidade.

  5. Comparativo das propriedades do concreto autoadensável (CAA utilizando areia fina e cinza volante

    Directory of Open Access Journals (Sweden)

    B. F. Tutikian

    Full Text Available O objetivo deste artigo é contribuir para a tomada de decisão sobre a definição do uso de materiais finos responsáveis pela resistência à segregação do concreto auto-adensável (CAA. Neste estudo, amostras de CAA foram dosadas com cinza volante, um material pozolânico, e areia fina, que é um material não pozolânico, utilizando o método de dosagem proposto por Tutikian & Dal Molin (2007 [1]. Foi observado que a utilização de cinza volante aumentou a resistência à compressão, principalmente nas idades mais avançadas, assim como os valores de módulo de deformação e velocidade das ondas de ultrasom. Também diminuiu a penetração de íons cloretos, para os mesmos valores de resistência em comparação com os CAA com areia fina e o custo final dos CAA com cinza volante foi inferior. Foram apresentados tanto os diagramas de dosagem como os de desempenho.

  6. Modelaje geológico y de recursos del yacimiento Pastelillo utilizando el krigeaje de indicadores

    Directory of Open Access Journals (Sweden)

    José Q. Cuador-Gil

    2005-03-01

    Full Text Available En ocasiones la complejidad y variabilidad de un yacimiento mineral hace dificil establecer dominios geológicos homogéneos que puedan ser utilizados para aplicar control geológico a la estimación de los parámetros más relevantes. La imposibilidad de crear un modelo geológico con unidades bien definidas conduce a trabajar con poblaciones heterogéneas, lo cual degrada considerablemente la calidad de las estimaciones. Tal es el caso de Pastelillo, yacimiento de materia prima para cemento, en el que es difícil reproducir la geometría de los distintos tipos tecnológicos utilizando el método tradicional de correlación geológica. Las distintas litologías que conforman el yacimientos están completamente mezcladas tanto en el plano como en la vertical y estos frecuentes cambios faciales provocan una gran variabilidad litológica y tecnológica en el yacimiento. Teniendo en cuenta lo anterior se propone emplear un método de interpolación espacial que permita hacer estimaciones en presencia de poblaciones complejas. En el artículo se establece un modelo tecnológico y de recursos para el yacimiento Pastelillo a partir del empleo de una técnica de estimación de la geoestadística no lineal: el krigeaje de indicadores.

  7. Biossorção de azul de metileno utilizando resíduos agroindustriais

    Directory of Open Access Journals (Sweden)

    Andressa C. Honorato

    2015-07-01

    Full Text Available O presente trabalho avaliou a capacidade de adsorção do corante azul de metileno nos resíduos da palha de milho e da bainha do palmito pupunha in natura. A caracterização dos resíduos foi determinada utilizando-se a microscopia eletrônica de varredura e espectroscopia na região do infravermelho a qual indicou a presença de grupos carboxílicos, hidroxila e carbonila. O tempo necessário para que o sistema atingisse o equilíbrio para ambos os resíduos foi de 240 min, seguindo uma cinética descrita pelo modelo de pseudo-segunda ordem. A capacidade máxima de adsorção foi de 102,8 mg g-1 para o resíduo da palha de milho, seguindo o modelo de isoterma de Langmuir e 50,9 mg g-1 para o resíduo de palmito pupunha, sendo que o modelo que melhor se ajusta foi Freundlich. Desta forma, esses resíduos são promissores para a adsorção do corante azul de metileno em efluentes.

  8. DESARROLLO DE APIO MINIMAMENTE PROCESADO FORTIFICADO CON VITAMINA E, UTILIZANDO LA INGENIERIA DE MATRICES

    Directory of Open Access Journals (Sweden)

    YISELL JOHAN MARTELO CASTAÑO

    2011-01-01

    Full Text Available El objetivo de este trabajo fue desarrollar un producto minimamente procesado fortificado con vitamina E, a partir de apio (Apium graveolens L. var.dulce, utilizando la ingenieria de matrices como metodologia de obtencion de alimentos funcionales. Trozos de apio impregnados al vacio con dl¿¿tocoferol acetato emulsificado en una solucion isotonica al vegetal de NaCl, 1,2%, fueron evaluados en funcion del tiempo de almacenamiento y el envasado (con y sin vacio, en terminos de la cuantificacion de sus propiedades fisicoquimicas, color, textura, estabilidad de la vitamina E y caracteristicas sensoriales. Se formulo la emulsion con el objetivo de adicionar teoricamente un 73% del Valor Diario Recomendado (VDR vitamina E/100 g de apio fresco y su cuantificacion se realizo por HPLC. La respuesta a la impregnacion en la matriz fue de 12,10+-1,15%, lo cual permitio alcanzar un 112% VDR vitamina E/100g apio fresco, manteniendose este contenido durante el almacenamiento de 9 dias en ambos tipos de envasado. Los parametros fisicoquimicos del producto fueron afectados por la IV, el tiempo y el envasado, manteniendo su coloracion verdosa y presentando disminucion en la firmeza. La ingenieria de matrices constituye una metodologia efectiva para el desarrollo de apio minimamente procesado adicionado con vitamina E.

  9. UTILIZANDO O MÉTODO TODIM PARA AVALIAR AS MELHORES EMPRESAS PARA TRABALHAR

    Directory of Open Access Journals (Sweden)

    Renato Teixeira da Silva

    2011-06-01

    Full Text Available Este artigo expõe uma nova proposta de ordenação das 5 melhores empresas para trabalhar em termos de qualidade do ambiente de trabalho e qualidade na gestão de pessoas utilizando-se do método TODIM como suporte científico para tal. A ordenação inicial, proposta pela revista Você/SA Exame, utiliza como método classificador o índice de felicidade no trabalho, uma soma ponderada de índices resultantes da percepção dos funcionários, das práticas da empresa e da constatação feita por jornalistas em visitas às empresas. Este trabalho, que utiliza o método TODIM, considera esses itens como critérios de avaliação e realiza uma análise comparativa das alternativas. Ao final, é executada uma comparação entre as ordenações e uma análise de sensibilidade, analisando as especificidades de cada método de ordenação e a consistência de seus resultados.

  10. Cálculo del factor de efectividad utilizando colocación ortogonal sobre elementos finitos

    Directory of Open Access Journals (Sweden)

    Javier Fontalvo Alzate

    1999-09-01

    Full Text Available En el presente documento se resuelve el problema del cálculo del factor de efectividad para la transferencia de masa y calor con reacción química en un pellet catalítico utilizando una técnica adecuada especialmente para números de Thiele elevados en donde la solución se restringe a una pequeña zona muy cercana a la superficie. La técnica aprovecha la rapidez de convergencia de la colocación ortogonal y la facilidad de ubicación de elementos en zonas en donde se presentan grandes gradientes del método para las diferencias finitas. La eficiencia del método está basada en la utilización del método LV para la descomposición de matrices. Se muestran comparaciones con otros métodos numéricos de solución del problema.

  11. PROPUESTA INFORMÁTICA PARA SELECCIONAR PERSONAL POR COMPETENCIAS UTILIZANDO TÉCNICAS DE INTELIGENCIA ARTIFICIAL

    Directory of Open Access Journals (Sweden)

    Raúl Martínez Rodríguez

    2006-12-01

    Full Text Available

    La selección de personal por competencias es un tema muy reciente que esta cautivando a las empresas que quieren asegurarse de contar con el personal calificado y competente. Su objetivo es seleccionar al candidato más idóneo para desempeñar un cargo ocupacional específico, teniendo en cuenta su potencial y capacidad de adaptación; lo que precisa ser más coherentes y no simplistas en el tratamiento de la información que se posee. En el presente trabajo se presenta una propuesta informática para realizar esta selección utilizando técnicas de inteligencia artificial (IA, que pueden proporcionar una solución satisfactoria a un problema real de gestión de personal.

  12. MODELAGEM DE UM SISTEMA MULTIAGENTE DE APOIO À PBL UTILIZANDO A METODOLOGIA MAS-COMMONKADS+

    Directory of Open Access Journals (Sweden)

    Laysa Mabel de Oliveira Fontes

    2014-10-01

    Full Text Available A aprendizagem baseada em problema (Problem-Based Learning - PBL é um método no qual os estudantes aprendem através da resolução de um problema que, em geral, não possui uma solução trivial e uma única solução correta. A PBL destaca o trabalho em equipe como um dos principais requisitos para o sucesso do processo de aprendizagem, ou seja, a colaboração é essencial. No entanto, a implantação de um método de ensino com base na PBL não é uma tarefa trivial. Em Ambientes Virtuais de Aprendizagem (AVAs, a complexidade de implantação deste método é ainda maior, pois o facilitador nem sempre pode detectar possíveis problemas na colaboração, nem possui todas as informações necessárias para aplicar as técnicas de aprendizagem deste método. Desta forma, este artigo apresenta o processo de modelagem de um Sistema Multiagente (SMA de apoio à PBL. O SMA proposto foi modelado utilizando a metodologia MAS-CommonKADS+, que consiste em uma extensão da metodologia MAS-CommonKADS.

  13. Resección quirúrgica de mucocele utilizando relleno siliconado

    Directory of Open Access Journals (Sweden)

    Adel Martínez

    2014-01-01

    Full Text Available El mucocele es una lesión que afecta especialmente las glándulas salivales menores; se forma debido a la extravasación de saliva mucosa producto de un trauma por mordedura. Teniendo en cuenta el factor causal, el mucocele se puede clasificar como quiste de extravasación mucosa o quiste de retención mucosa. Afecta primordialmente el labio inferior y se manifiesta como un nódulo, translúcido y circunscrito con un contenido mucoso o muestra una elevación del color de la mucosa que la cubre. El tratamiento consiste en la resección quirúrgica de la lesión, que incluya las glándulas salivales menores afectadas. Se realizó la revisión de una caso clínico de paciente de 18 años de edad, que presenta mucocele profundo, el cual fue tratado con resección quirúrgica utilizando como relleno de la cavidad quística una silicona fluida, que permite mantener los reparos anatómicos y así poder realizar la remoción completa de la lesión y las glándulas afectadas.

  14. Uma Abordagem de Monitoração de Tráfego de Rede utilizando Lógica Difusa

    OpenAIRE

    Silveira, Enio Rovere; Universidade Federal de Santa Catarina; Dantas, M. A.R.; Universidade Federal de Santa Catarina

    2005-01-01

    Neste artigo, apresentamos um trabalho de pesquisa de monitoração de tráfego de rede utilizando uma abordagem de lógica difusa. Nossa contribuição está focada na criação de um protótipo que pudesse ser avaliado em uma configuração real de produção de uma grande organização, utilizando-se de hardware e software existentes na empresa. Resultados experimentais obtidos através de estudos de casos reais no ambiente, indicam o sucesso da abordagem na melhoria da monitoração de tráfego da rede....

  15. [Nuclear theory

    International Nuclear Information System (INIS)

    Haxton, W.

    1990-01-01

    This report discusses research in nuclear physics. Topics covered in this paper are: symmetry principles; nuclear astrophysics; nuclear structure; quark-gluon plasma; quantum chromodynamics; symmetry breaking; nuclear deformation; and cold fusion

  16. Evaluación de ataques UDP Flood utilizando escenarios virtuales como plataforma experimental

    Directory of Open Access Journals (Sweden)

    Deyci Toscano

    2011-07-01

    Full Text Available Los ataques por denegación de servicio (DoS tienen como propósito imposibilitar el acceso a los servicios de una organización durante un periodo indefinido; por lo general, están dirigidos a los servidores de una empresa, para que no puedan ser accedidos por usuarios autorizados. El presente trabajo se enfoca en la evaluación de ataques DoS tipo UDP Flood, utilizando como plataforma de experimentación un entorno virtual de red que permite identificar cómo actúan dichos ataques en la saturación del ancho de banda; para llevarlo a cabo se diseñó e implementó una red híbrida con segmentación WAN, LAN y DMZ que inhabilita el acceso interno y externo a un servicio Web expuesto. Las herramientas evaluadas fueron UPD Unicorn, Longcat Flooder y UDPl.pl Script de Perl; las dos primeras instaladas sobre Windows, y la última, sobre Linux. Para validar está investigación se desarrolló un mecanismo de detección y mitigación de los ataques a nivel del firewall e IDS/IPS, evitando de este modo la saturación de la red. Finalmente, se evaluó el consumo dememoria, CPUy ancho de banda durante el ataque, la detección y la evasión, con el fin de determinar cuál genera mayor impacto. Los resultados demuestran que el mecanismo detecta, controla y mitiga los ataques.

  17. Evaluación de ataques UDP Flood utilizando escenarios virtuales como plataforma experimental

    Directory of Open Access Journals (Sweden)

    Walter Fuertes

    2012-05-01

    Full Text Available Los ataques por denegación de servicio (DoS tienen como propósito imposibilitar el acceso a los servicios de una organización durante un periodo indefinido; por lo general, están dirigidos a los servidores de una empresa, para que no puedan ser accedidos por usuarios autorizados. El presente trabajo se enfoca en la evaluación de ataques DoS tipo UDP Flood, utilizando como plataforma de experimentación un entorno virtual de red que permite identificar cómo actúan dichos ataques en la saturación del ancho de banda; para llevarlo a cabo se diseñó e implementó una red híbrida con segmentación WAN, LAN y DMZ que inhabilita el acceso interno y externo a un servicio Web expuesto. Las herramientas evaluadas fueron UPD Unicorn, Longcat Flooder y UDPl.pl Script de Perl; las dos primeras instaladas sobre Windows, y la última, sobre Linux. Para validar está investigación se desarrolló un mecanismo de detección y mitigación de los ataques a nivel del firewall e IDS/IPS, evitando de este modo la saturación de la red. Finalmente, se evaluó el consumo dememoria, CPUy ancho de banda durante el ataque, la detección y la evasión, con el fin de determinar cuál genera mayor impacto. Los resultados demuestran que el mecanismo detecta, controla y mitiga los ataques. 

  18. Acceso remoto seguro a cuentas de usuario utilizando plataformas de virtualización

    Directory of Open Access Journals (Sweden)

    Walter Fuertes, Maritza Enríquez y Diego Veloz

    2011-05-01

    Full Text Available En  las  universidades  persiste  el  problema  de  la subutilización de recursos tecnológicos; sin embargo, sesigue  incurriendo en gastos por adquisición de servidores,hardware  y  software. Frente  a  este  escenario,  en  laindustria se han venido desarrollando las tecnologías devirtualización, que ahorran energía y costos de inversiónde hardware. En  consecuencia,  el  artículo propone  elacceso remoto seguro a cuentas de usuario en un servidoruniversitario  virtualizado;  para  llevarlo  a  cabo  sediseñaron  e  implementaron  varias  topologías  deexperimentación, utilizando Virtual Box 3.1.3 y VMwareServer 2.0.2,  y  se  evaluaron diversas  tecnologías  deconexiones remotas seguras, bajo  idénticas condicionesy parámetros de  comprobación. En  cada  topología  seevaluó el rendimiento del servidor, el performance y  laseguridad  de  la  red  en  producción. Los  resultadosmuestran  la  funcionalidad  de  este  proyecto  deinvestigación  que  facilita  el  acceso  remoto  seguro deusuarios a los recursos informáticos universitarios.

  19. Productividad en una celda de manufactura flexible simulada en promodel utilizando path networks type crane

    Directory of Open Access Journals (Sweden)

    María Elena Bernal Loaiza

    2015-04-01

    Full Text Available Esta investigación se centra en el diseño de una simulación del proceso de una celda de manufactura flexible (FMC de la Facultad de Ingeniería Industrial de la Universidad Tecnológica de Pereira, con el propósito de medir y elegir aquella alternativa de solución que mejore en mayor grado la productividad del sistema actual utilizando los resultados que proporciona el software Promodel. Para realizar lo anterior se utilizaron etapas de la simulación como definición del sistema, formulación del modelo, identificación de variables, recolección de datos, implementación e interpretación.Como resultado, se calculó la productividad teniendo en cuenta las variables del modelo y tiempo de la simulación, al mismo tiempo se interpretó la información de cada una de las locaciones, hallando el porcentaje de utilización y total de entidades para las locaciones con capacidad unitaria; para las locaciones con mayor capacidad se encuentra información referente al porcentaje de tiempo vacío, parcialmente ocupado, lleno y no disponible respecto del tiempo disponible. A diferencia de otras simulaciones, en este diseño en la parte de redes se utilizó el tipo de red Crane, asociado a los recursos del modelo. El cual facilita el desplazamiento de los brazos robots con las piezas que circulan a través del sistema.

  20. Clasificador neuronal de fallos en rodamientos utilizando entradas basadas en transformadas wavelet packet y de Fourier

    Directory of Open Access Journals (Sweden)

    Víctor Gómez

    2013-01-01

    Full Text Available En este artículo se propone y se evalúa experimentalmente un método de diagnóstico de fallas en rodamientos utilizando la clasificación de patrones provenientes de las señales de las vibraciones mecánicas. El método utiliza pre-procesamientos con las transformadas de Fourier y wavelet packet para luego alimentar una red neuronal clasificadora que determina el tipo de fallo. Para evaluar las variables de entrada se realiza un análisis de varianza ANOVA comparando el efecto que tienen los factores: velocidad, carga, falla en pista externa y falla en elemento rodante sobre cada uno de los parámetros propuestos como entradas para las redes neuronales artificiales (RNA. Una vez seleccionadas las variables de entrada más adecuadas, se realiza la búsqueda del clasificador más apropiado explorando diversas configuraciones de red neuronal. Se han entrenado alrededor de 2000 RNA con el propósito de encontrar el clasificador más adecuado. Los resultados de validación muestran que para el algoritmo de entrenamiento tipo gradiente conjugado escalado (trainscg se alcanza un porcentaje de éxito en la clasificación del 88,5 %, mientras que para el algoritmo de entrenamiento de Levenberg-Marquardt (trainlm se logra un 91,8 %. Adicionalmente, se resalta que en 7 ocasiones se logró el 100 % de aciertos en la clasificación.

  1. CÓMO MEJORAR LA EFICIENCIA OPERATIVA UTILIZANDO EL TRABAJO EN EQUIPO

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Franco

    2000-01-01

    Full Text Available En este artículo se presenta un modelo para aumentar la eficiencia operativa de diversas organizaciones de la economía con el fin de mejorar sus resultados financieros y por consiguiente su competitividad. Este modelo permite aprovechar los talentos de las personas que laboran en la empresa, organizándolos en equipos o grupos para que puedan identificar y aprovechar oportunidades de mejoramiento que conduzcan a un aumento significativo de la eficiencia productiva. La metodología que aquí se expone es particularmente útil para las empresas medianas y pequeñas que regularmente no cuentan con recursos ni infraestructura suficiente para introducir los cambios que CÓMO MEJORAR LA EFICIENCIA OPERATIVA UTILIZANDO EL TRABAJO EN EQUIPO CARLOS ALBERTO FRANCO Director MBA de la Universidad Icesi en convenio con la Universidad de Tulane. Ingeniero Eléctrico de la Universidad del Valle. Máster en Ingeniería de Carnegie Mellon University, Pisttsburg. Ph.D. en Ingeniería Eléctrica de USC (U.S.A. FRANCISCO VELÁSQUEZ V. Director del Programa de Administración de Empresas Plan Diurno. Ingeniero Electricista de la Universidad del Valle. Magister en Administración del Instituto de Estudios Superiores de Monterrey, Campus ciudad de México. mejoren su productividad. El modelo se puede aplicar directamente por los jefes o supervisores de cada una de las áreas de la empresa, sin necesidad de recurrir a asesorías costosas.

  2. EVALUACIÓN DE LA BIOESTIMULACION (NUTRIENTES EN SUELOS CONTAMINADOS CON HIDROCARBUROS UTILIZANDO RESPIROMETRIA

    Directory of Open Access Journals (Sweden)

    Erika garcia

    2011-01-01

    Full Text Available Se evaluó el proceso de bioestimulación por nutrientes: fertilizantes inorgánicos compuestos (FIC N:P:K 28:12:7 y sales inorgánicas simples (SIS NH4NO3 y K2HPO4 en suelos contaminados con hidrocarburos utilizando respirometría. El suelo fue contaminado con lodos aceitosos a una concentración ~40,000 mgTPH/kgps. Para cuantificar el consumo de oxigeno se utilizaron dos respirómetros de medición manométrica HACH® 2173b y OXITOP® PF600 durante ensayos de trece días. Se evaluaron dos tratamientos (FIC y SIS y tres controles (abiótico, sustrato de referencia y sin nutrientes. Se analizaron parámetros físico-químicos (pH, nutrientes y TPH y microbiológicos (heterótrofos y degradadores al inicio y al final de cada ensayo. SIS y el control sin nutrientes presentaron las mayores tasas de respiración, en el equipo HACH se obtuvieron valores de: 802.28 y 850.72 mgO2kgps-1d-1 respectivamente mientras que en el OXITOP fueron de 936.65 y 502.05 mgO2kgps-1d-1, respectivamente. En ninguno de los equipos se observo un aumento significativo de los degradadores, indicando que la bioestimulación no tuvo un efecto sobre la densidad microbiana. Por otro lado FIC, presentó los recuentos y tasas de respiración más bajas (188.18 y 139.87 mgO2kgps-1d-1 en HACH y OXITOP, respectivamente, esto pudo estar correlacionado a un efecto toxico generado por la acumulación de amoniaco.

  3. Clasificación del clutter marino utilizando redes neuronales artificiales

    Directory of Open Access Journals (Sweden)

    Argel Gonzalez Padilla

    2013-04-01

    Full Text Available La detección de radar bajo la acción del clutter marino es un problema actual. La efectividad de esta detección puede ser mejorada o aún optimizada si el comportamiento estadístico de los parámetros de las señales dispersadas por la superficie del mar (clutter marino es conocida. En el presente trabajo, la mayoría de los modelos estadísticos del clutter marino bajo diferentes condiciones es dada y se logra en un solo documento de manera sintética agrupar un gran volumen de información, difícil de encontrar, y en muchos casos, de interpretar. La mayor contribución investigativa de este trabajo es la presentación de los fundamentos de un sistema auto adaptativo  para la detección de blancos de radar, basado en el reconocimiento de diferentes distribuciones que modelan las mediciones de amplituddelclutter marino, obtenida en un intervalo de tiempo dado. Realizando una clasificación más fina al especificar el rango de valores que toman los parámetros de la distribución, para el intervalo de tiempo que se analiza. Este sistema fue simulado satisfactoriamente utilizando redes neuronales.Los resultados revelaron que se puede realizar de forma efectiva el reconocimiento de distribuciones de mediciones de amplitud del clutter marino y de los parámetros de la distribución.

  4. Nuclear topics

    International Nuclear Information System (INIS)

    Lukner, C.

    1982-07-01

    The pamphlet touches on all aspects of nuclear energy, from the world energy demands and consumption, the energy program of the Federal Government, nuclear power plants in the world, nuclear fusion, nuclear liability up to the nuclear fuel cycle and the shutdown of nuclear power plants. (HSCH) [de

  5. Nuclear power and nuclear weapons

    International Nuclear Information System (INIS)

    Vaughen, V.C.A.

    1983-01-01

    The proliferation of nuclear weapons and the expanded use of nuclear energy for the production of electricity and other peaceful uses are compared. The difference in technologies associated with nuclear weapons and nuclear power plants are described

  6. Nuclear rights - nuclear wrongs

    Energy Technology Data Exchange (ETDEWEB)

    Paul, E.F.; Miller, F.D.; Paul, J.; Ahrens, J.

    1986-01-01

    This book contains 11 selections. The titles are: Three Ways to Kill Innocent Bystanders: Some Conundrums Concerning the Morality of War; The International Defense of Liberty; Two Concepts of Deterrence; Nuclear Deterrence and Arms Control; Ethical Issues for the 1980s; The Moral Status of Nuclear Deterrent Threats; Optimal Deterrence; Morality and Paradoxical Deterrence; Immoral Risks: A Deontological Critique of Nuclear Deterrence; No War Without Dictatorship, No Peace Without Democracy: Foreign Policy as Domestic Politics; Marxism-Leninism and its Strategic Implications for the United States; Tocqueveille War.

  7. Nuclear moments

    CERN Document Server

    Kopferman, H; Massey, H S W

    1958-01-01

    Nuclear Moments focuses on the processes, methodologies, reactions, and transformations of molecules and atoms, including magnetic resonance and nuclear moments. The book first offers information on nuclear moments in free atoms and molecules, including theoretical foundations of hyperfine structure, isotope shift, spectra of diatomic molecules, and vector model of molecules. The manuscript then takes a look at nuclear moments in liquids and crystals. Discussions focus on nuclear paramagnetic and magnetic resonance and nuclear quadrupole resonance. The text discusses nuclear moments and nucl

  8. Propagación y crecimiento inicial del abarco (Cariniana pyriformis Miers, utilizando semillas silvestres

    Directory of Open Access Journals (Sweden)

    Harlenson Pinilla Cespedes

    2016-12-01

    Full Text Available Se realizó la propagación de la especie forestal Abarco Cariniana Pyriformis Miers, con el objetivo de analizar su comportamiento en vivero utilizando semillas botánicas no mejoradas. Se utilizó un diseño completamente aleatorio con arreglo factorial compuesto por 10 factores por condición lumínica -luz y sombra- y 45 unidades experimentales. Se utilizaron diferentes combinaciones de sustratos orgánicos. Las semillas fueron sometidas a un tratamiento pre-germinativo en presencia de un testigo. Las variables evaluadas fueron porcentaje de germinación, crecimiento en altura y diámetro y porcentaje de supervivencia. La especie comenzó la germinación 13 días después de la siembra y se extendió hasta el día 27. Los resultados del proceso de germinación fueron de 60 % y 40% a plena exposición solar y bajo malla poli-sombra, respectivamente. El crecimiento en altura de las plántulas muestra al factor CF con el mejor valor 28,94 cm, bajo condiciones de luz y el factor EF, con 25,56 cm a plena exposición de sombra. Mientras el incremento en diámetro los factores DF y EF registraron valores de 1,04 cm y 0,84 cm, bajo las condiciones sol y sombra respetivamente. Las semillas de esta especie son no-fotoblásticas, es decir que para su germinación es indiferente la presencia o ausencia de luz. Las plántulas ubicadas en la condición ambiental sol registraron mejores valores promedios en las variables diámetro y altura. Por tanto, esta condición ejerce efecto positivo para el crecimiento inicial de las plántulas de Abarco C. pyriformis. 

  9. Seguimiento de la reactogenicidad de la vacuna DTP cubana, utilizando dos métodos paralelos

    Directory of Open Access Journals (Sweden)

    María de los Ángeles Peña Machado

    2005-05-01

    Full Text Available Con el objetivo de caracterizar la reactogenicidad de la vacuna Antidiftérica-Antitetánica- Antipertusis (DTP cubana, desarrollada por el Instituto Finlay, se realizó un estudio utilizando dos métodos o fuentes de información diferentes y paralelos. La primera se obtuvo de un ensayo clínico (EC Fase IV, abierto, no controlado, en el que se incluyeron 57 lactantes. La segunda fuente de información se obtuvo de los reportes de los eventos temporalmente asociados a la vacunación (ETAV, recepcionados por la Unidad Coordinadora Nacional de Farmacovigilancia (UCNFv que incluyen a 86 lactantes que fueron atendidos por sospechas de ETAV. En el EC se aplicaron 167 dosis, los eventos adversos esperados e inesperados se observaron en un escaso número de lactantes, fueron mayoritariamente ligeros y autolimitados en el tiempo y su frecuencia de aparición se redujo en la 2da y 3ra dosis. El dolor fue el evento local más frecuente y la fiebre fue el evento general que más se presentó. No se reportaron vómitos y la anorexia, la somnolencia, y el llanto persistente aparecieron en un número limitado de sujetos vacunados.Se presentaron 12 eventos no esperados, solo en 2 de ellos se consideró que existía relación causal con la vacunación. Se reportó un evento adverso grave (niña hospitalizada por síndrome febril prolongado postvacunación, que se estudió y demostró que fue causado por una sepsis urinaria persistente provocada por una malformación vesico-ureteral. Los 86 reportes recepcionados por la UCNFv incluían un total de 141 ETAV, dentro de los síntomas locales, el eritema alcanzó un 9,30% y la induración un 5,81%, la fiebre fue un síntoma frecuente aunque no se especifica la temperatura corporal alcanzada. Aunque existen varias diferencias con relación a las condiciones en que se realiza la vigilancia de eventos adversos en un EC o en la práctica clínica habitual, los resultados aquí analizados nos confirman que la

  10. Multielement determination in Cuban red mangrove samples using nuclear and related analytical techniques; Determinacion multielemental en muestras de mangles cubanos utilizando tecnicas analiticas nucleares y conexas

    Energy Technology Data Exchange (ETDEWEB)

    Estevez Alvarez, J R; Aguiar Lambert, D; Montero Alvarez, A; Pupo Gonzalez, I; Padilla Alvarez, R [Centro de Estudios Aplicados al Desarrollo Nuclear, La Habana (Cuba); Gonzalez Garcia, H; Ramirez Sasco, M [Centro de Ingenieria y Manejo Ambiental de Bahias y Costas, La Habana (Cuba)

    1999-12-31

    In the present work the contents of Al; K; Ca; Mn; Fe; Ni; Cu; Zn; Sr; Cd and Pb in red mangroves (Rhizophora mangle) from different Cuban regions are determined, using Energy Dispersive X-Ray Fluorescence (Emission-Transmission (Et) and I/C methods), Atomic Absorption Spectrophotometry (AAS), and Polarography (Anodic Stripping Voltametry method). Biological Certified Reference Materials (CRM) are employed for the tracing of the tracing of the curves of the relative I/C method and for the evaluation of the analytical results accuracy. The reliability of the results is also checked by statistical means. Standard deviations and the detection limits of each method are reported. Finally, the obtained values for the concentration of the different elements in each studied ecosystem are presented; a detailed discussion about their significance will be performed in a further paper.

  11. Controle de um pré-regulador com alto fator de potência utilizando microcontrolador PIC /

    OpenAIRE

    Grosse, Alexandre de Souza

    1999-01-01

    Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Estudo de controle digital em eletrônica de potência utilizando um microcontrolador especial PIC17C756 em um pré-regulador para correção ativa do fator de potência. O enfoque principal é dado no controle da malha de corrente do conversor elevador utilizado. Parte-se da caracterização do microcontrolador e seus periféricos e prossegue-se através do projeto do conversor BOOST. São apresentadas as técnicas de...

  12. Desenvolvimento de recobrimento retardante de chama em tecido de algodão utilizando bentonita sódica

    OpenAIRE

    Zottis, Ricardo

    2012-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Química Os acabamentos retardantes de chama são substâncias aplicadas nos substratos têxteis com intuito de dificultar a ignição e tornar demorada a propagação da chama, reduzindo os riscos de incêndios. Neste trabalho foi investigada a incorporação de argila no tratamento retardante de chama em tecido de algodão utilizando bentonita sódica juntamente com aditivos fo...

  13. IDENTIFICACION DEL CILINDRO NUDOSO EN IMÁGENES TC DE TROZAS PODADAS DE PINUS RADIATA UTILIZANDO REDES NEURONALES ARTIFICIALES

    OpenAIRE

    Rojas Espinoza,Gerson; Ortiz Irribarren,Oscar

    2010-01-01

    La factibilidad de identificar el cilindro nudoso en imágenes de tomografía computarizada de rayos X (TC) de trozas podadas de pino radiata (Pinus radiata D. Don), fue evaluada utilizando un método de clasificación supervisada basado en Redes Neuronales Artificiales (RNA). El proceso de clasificación consideró también la identificación de la zona libre de defectos y nudos. Treinta trozas podadas de pino radiata fueron escaneadas en un escáner médico multi-slice de rayos X, donde las imágenes ...

  14. Obtención de un hidrolizado proteico por fermentación sumergida de plumas utilizando Bacillus spp

    OpenAIRE

    De Macedo, Manuel; Segura, Roxana; Piñero B., Judith; Coello, Nereida

    2009-01-01

    Se obtuvo un hidrolizado proteico a partir de la fermentación sumergida de las plumas por una cepa queratinolítica de Bacillus spp designada como LPB-2. El proceso se realizó en condiciones aeróbicas, utilizando un medio salino basal (pH 7,5), suplementado con 20 g/l de plumas molidas y un fermentador de 6 L de capacidad regulado a 40° C durante 26 horas. Mediante alimentaciones semi-continuas de sustrato, efectuadas cada 12 horas, se pudo prolongar el tiempo de fermentación hasta 58 horas. A...

  15. Sorologia da hanseníase utilizando PGL-I: revisão sistemática

    OpenAIRE

    Moura,Rodrigo Scaliante de; Calado,Karla Lucena; Oliveira,Maria Leide W.; Bührer-Sékula,Samira

    2008-01-01

    A sorologia utilizando o antígeno espécie-específico do Mycobacterium leprae, PGL-I, pode ser um marcador de carga bacteriana em pacientes com hanseníase. Estudos identificaram potencial de uso da sorologia na classificação de pacientes para fins de tratamento, monitoramento de terapia, risco de recidiva e na seleção dos contatos com maior risco de adoecer. Foi realizada uma revisão sistemática e 26 artigos foram incluídos na análise comparativa. Avaliamos os resultados do uso da sorologia PG...

  16. Comportamento de reator de leito fluidizado trifásico aeróbico utilizando diferentes materiais suporte

    OpenAIRE

    Martins, Cláudia Lavina

    2003-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Ambiental. Este trabalho apresenta estudos realizados com reator de leito fluidizado trifásico aeróbio (RLFTA), aplicado ao tratamento de esgoto sanitário, tendo como objetivo avaliar seu comportamento utilizando diferentes materiais suporte: PET, OSBG® e PVC. Foram aplicadas cargas orgânicas volumétricas (COV) de 13 a 29 Kg DQO/m3.dia e tempo de retenção hidráulica ...

  17. Estudo da degradação do metil parabeno utilizando processos Fenton, foto-Fenton e eletro-Fenton

    OpenAIRE

    Carlos Dante Gamarra Güere

    2014-01-01

    Os disruptores endócrinos são frequentemente relatados na literatura como contaminantes de ambientes aquáticos. Por isso, os processos oxidativos avançados (POAs) têm sido estudados como alternativa para o tratamento em meio aquoso. Os POAs consistem na oxidação de compostos orgânicos por radicais hidroxilas com alto poder oxidante. Diante desses aspectos, o presente trabalho tem como principal objetivo o estudo da degradação do metil parabeno (MeP) por processos Fenton, utilizando planejame...

  18. Procedimiento para la gestión de mantenimiento utilizando herramientas de la cuarta generación

    OpenAIRE

    Aracelis Barrios; Maritza Ortiz

    2013-01-01

    El presente artículo presenta el diseño de un procedimiento para una gestión de mantenimiento sistémico, utilizando un conjunto de herramientas, que enfocan el uso de los recursos de la empresa asociados con las Personas, los Procesos y la Tecnología, orientados a mejorar la productividad, la toma de decisiones acertadas y a maximizar el rendimiento de los equipos, considerando entre otros, los factores de Confiabilidad, Mantenibilidad, Seguridad, Calidad y Medio Ambiente. El desarrollo del p...

  19. Arquitectura para balancear carga dinámica por demanda adaptativa, utilizando CORBA en JAVA-IDL

    OpenAIRE

    Jesús Chávez Esparza; Gerardo Rentería Castillo; Francisco Javier Luna Rosas

    2008-01-01

    En este trabajo desglosaremos la elaboración de una nueva Arquitectura para balancear carga dinámica, por demanda adaptativa, utilizando CORBA en JAVA-IDL. Una arquitectura de balanceo de carga es un sistema que permite distribuir el trabajo computacional entre varias máquinas, con el objetivo de reducir el tiempo de respuesta global del sistema. A través de las pruebas se justifica el uso de la arquitectura y se definen los parámetros a considerar para obtener un óptimo desempeño, refiriéndo...

  20. Generando entornos de investigación y desarrollo utilizando redes inalámbricas de sensores (WSN)

    OpenAIRE

    Sosa, Eduardo Omar; Godoy, Diego Alberto

    2013-01-01

    Las Redes Inalámbricas de Sensores (WSN) jugarán un papel preponderante tanto en las actividades académicas y como en el desarrollo en nuestro país. En este artículo se reportan actividades desarrolladas en dos universidades argentinas, utilizando a la tecnología WSN como disparador de actividades de investigación, desarrollo. La aplicación de ésta tecnología de última generación se enmarcan en el dominio de “Internet de las Cosas” y “Ciudades Inteligentes”. Las actividades teórico-práctic...

  1. Reconocimiento y control de calidad de engranajes utilizando técnicas algoritmicas de tratamiento digital de imagenes

    OpenAIRE

    Sotelo Valer, Freddy; Sotelo Valer, Freddy

    2005-01-01

    La presente tesis está constituida por el desarrollo, simulación e implementación de técnicas de procesamiento digital de imágenes por visión artificial, mediante compiladora y su aplicación en el control de calidad de engranajes. EJ trabajo fundamentalmente se ha realizado en tres etapas: 1. Se desarrollaron los algoritmos para procesos puntuales necesarios en el sistema de control de calidad. 2. Los algoritmos desarrollados en la etapa inicial fueron verificados utilizando como sop...

  2. BOMBEAMENTO DE ÁGUA NO MEIO RURAL UTILIZANDO UM CARNEIRO HIDRÁLICO DE BAIXO CUSTO

    OpenAIRE

    Costa, Niedja Bezerra; Silva, Raphael Pereira; Silva, Wilson Araújo da

    2013-01-01

    RESUMO: A recente crise da energia convencional tem ocasionado a exploração de fontes alternativas de energias para suprir usos doméstico, industrial e agrícola. O carneiro hidráulico ou aríete hidráulico é uma máquina simples que possui características geratriz e operatriz. A fonte de energia é a altura de queda d’água que, em geral, é produzida artificialmente por meio de pequena barragem. O bombeamento de água utilizando carneiro hidráulico é amplamente empregado em muitas propriedades, pr...

  3. Nuclear power

    International Nuclear Information System (INIS)

    Abd Khalik Wood

    2005-01-01

    This chapter discussed the following topics related to the nuclear power: nuclear reactions, nuclear reactors and its components - reactor fuel, fuel assembly, moderator, control system, coolants. The topics titled nuclear fuel cycle following subtopics are covered: , mining and milling, tailings, enrichment, fuel fabrication, reactor operations, radioactive waste and fuel reprocessing. Special topic on types of nuclear reactor highlighted the reactors for research, training, production, material testing and quite detail on reactors for electricity generation. Other related topics are also discussed: sustainability of nuclear power, renewable nuclear fuel, human capital, environmental friendly, emission free, impacts on global warming and air pollution, conservation and preservation, and future prospect of nuclear power

  4. Radiopacity of restorative materials using digital images Radiopacidade de materiais restauradores utilizando imagens digitais

    Directory of Open Access Journals (Sweden)

    Leda Maria Pescinini Salzedas

    2006-04-01

    Full Text Available The radiopacity of esthetic restorative materials has been established as an important requirement, improving the radiographic diagnosis. The aim of this study was to evaluate the radiopacity of six restorative materials using a direct digital image system, comparing them to the dental tissues (enamel-dentin, expressed as equivalent thickness of aluminum (millimeters of aluminum. Five specimens of each material were made. Three 2-mm thick longitudinal sections were cut from an intact extracted permanent molar tooth (including enamel and dentin. An aluminum step wedge with 9 steps was used. The samples of different materials were placed on a phosphor plate together with a tooth section, aluminum step wedge and metal code letter, and were exposed using a dental x-ray unit. Five measurements of radiographic density were obtained from each image of each item assessed (restorative material, enamel, dentin, each step of the aluminum step wedge and the mean of these values was calculated. Radiopacity values were subsequently calculated as equivalents of aluminum thickness. Analysis of variance (ANOVA indicated significant differences in radiopacity values among the materials (PA radiopacidade dos materiais tem sido valorizada como importante requisito, incrementando o diagnóstico radiográfico. O objetivo deste estudo foi avaliar, no sistema digital Digora, as densidades radiográficas de 06 materiais restauradores comparando-os aos tecidos dentais (esmalte e dentina, expressos em milímetros de alumínio (mm Al. Foram confeccionadas 05 amostras de cada material e três cortes de um molar extraído hígido (incluindo esmalte e dentina, com 2 mm de espessura, e um penetrômetro de alumínio com 09 degraus. Sobre cada placa óptica foram colocados amostras dos diferentes materiais, um corte do dente humano, o penetrômetro e a identificação, e feita a exposição utilizando um aparelho de raios X. Foram obtidas 05 medidas de densidade radiográfica de

  5. Nuclear science

    International Nuclear Information System (INIS)

    1989-01-01

    This fact sheet answers specific questions about the Department of Energy's possible acquisition and conversion of a partially completed commercial nuclear power plant to a nuclear materials production facility. The nuclear power plant is the Washington Nuclear Plant number sign 1 owned by the Washington Public Power Supply System and is located on DOE's Hanford Reservation near Richland, Washington

  6. Nuclear science

    International Nuclear Information System (INIS)

    1989-04-01

    This report answers questions about the Department of Energy's possible acquisition and conversion of a partially completed commercial nuclear power plant to a nuclear materials production facility. The nuclear power plant is the Washington Nuclear Plant No.1 owned by the Washington Public Power Supply System and is located on DOE's Hanford Reservation near Richland, Washington

  7. Nuclear medicine

    International Nuclear Information System (INIS)

    Lentle, B.C.

    1986-01-01

    Several growth areas for nuclear medicine were defined. Among them were: cardiac nuclear medicine, neuro-psychiatric nuclear medicine, and cancer diagnosis through direct tumor imaging. A powerful new tool, Positron Emission Tomography (PET) was lauded as the impetus for new developments in nuclear medicine. The political environment (funding, degree of autonomy) was discussed, as were the economic and scientific environments

  8. Nuclear option

    Energy Technology Data Exchange (ETDEWEB)

    Kemm, K R

    1978-05-01

    The global outlook is that nuclear reactors are here to stay and South Africa has already entered the nuclear power stakes. This article discusses the rocketing oil prices, and the alternatives that can be used in power generation, the good safety record of the nuclear industry and the effect that South Africa's first nuclear power station should have on the environment.

  9. Nuclear resisters

    International Nuclear Information System (INIS)

    1981-01-01

    The booklet contains six papers by different authors, under the headings: dangers along the nuclear fuel cycle; the nuclear profiteers; the nuclear state is a police state; a non-disposable future (renewable energy sources, energy conservation); nuclear weapons - out of control; man made madness. (U.K.)

  10. Nuclear links

    International Nuclear Information System (INIS)

    1981-01-01

    The subject is dealt with in sections: introduction; energy and the third world; world energy consumption 1978; oil -the energy dilemma; nuclear chains - introduction; uranium; Namibia; enrichment and reprocessing; countries with enrichment and reprocessing facilities; waste; conclusion; why take the nuclear option; third world countries with nuclear reactors; the arms connection; government spending and human resources 1977 (by countries); nuclear power - the final solution; the fascists; world bank; campaigns; community action in Plogoff; Australian labour movement; NUM against nuclear power; Scottish campaign; students against nuclear energy; anti-nuclear campaign; partizans; 3W1 disarmament and development; campaign ATOM; CANUC; 3W1; SANE. (U.K.)

  11. Elaboración y caracterización estructural de fibras de tereftalato de polietileno (PET) dopadas con nanocobre (0) utilizando proceso de extrusión

    OpenAIRE

    Guzman, A.; Cárcamo, H.; León, O.

    2015-01-01

    El presente estudio describe la elaboración y caracterización de una fibra sintética bactericida compuesta por Tereftalato de Polietileno reciclado (rPET) y nanopartículas de cobre (0), mediante un proceso de extrusión utilizando una extrusora monohusillo. Las nanopartículas empleadas fueron elaboradas utilizando radiación microondas y ultrasonido. Para la elaboración de la fibra se produce un masterbatch de rPET con polvo de cobre nanométrico empleando un solvente de alto punto de fusión (tr...

  12. Direcionadores de preferencia para nectares de uva comerciais tradicionais e "lights" utilizando regressão por minimos quadrados parciais (PLSR).

    OpenAIRE

    Leonardo Rangel Alves

    2008-01-01

    Resumo: Este estudo objetivou Identificar direcionadores de preferência de oito amostras comerciais de néctar de uva (tradicionais e "light") utilizando metodologias estatísticas avançadas para relacionar dados de perfil sensorial, físico-químicos e aceitabilidade. Oito amostras comerciais de néctares de uva (quatro tradicionais e suas respectivas versões "light") foram analisadas. Um teste de Aceitação utilizando a escala hedônica híbrida foi realizado com 114 consumidores. Quatorze termos d...

  13. Diseño y evaluación de un procedimiento on-line para la biorremediación de aguas radiactivas en centrales nucleares

    OpenAIRE

    Belinchón Vergara, Julio Angel

    2016-01-01

    Recientemente se ha demostrado la existencia de microorganismos en las piscinas de almacenamiento de combustible nuclear gastado en las centrales nucleares utilizando técnicas convencionales de cultivo en el laboratorio. Estudios posteriores han puesto de manifiesto que los microorganismos presentes eran capaces de colonizar las paredes de acero inoxidable de las piscinas formando biopelículas. Adicionalmente se ha observado la capacidad de estas biopelículas de retener radionúclidos, lo que ...

  14. Intolerância glicêmica e o prognóstico perinatal em gestantes utilizando anti-retrovirais

    Directory of Open Access Journals (Sweden)

    El Beitune Patrícia

    2003-01-01

    Full Text Available OBJETIVOS: estudar o efeito das drogas anti-retrovirais sobre o metabolismo glicêmico em gestantes portadoras do HIV-1 e a ação dessas medicações sobre o prognóstico perinatal. MÉTODOS: estudo prospectivo realizado em 57 gestantes divididas em três grupos: grupo AZT, utilizando zidovudina (n=20; grupo TT, utilizando zidovudina+lamivudina+nelfinavir (n=25, e grupo controle, gestantes normais (n=12. Obteve-se a área sob a curva (ASC das glicemias após teste oral de tolerância à glicose com 75 g de glicose em quatro oportunidades durante a gravidez (1º=14-20 semanas, 2º=21-26 semanas, 3º=27-32 semanas e 4º=33-38 semanas. O prognóstico perinatal levou em consideração as taxas de prematuridade, restrição de crescimento intra-útero (RCIU, baixo peso ao nascer, mortalidade perinatal e transmissão vertical do HIV-1. Os dados foram analisados utilizando-se os testes não paramétricos do c², de Friedman e de Kruskal-Wallis. RESULTADOS: os valores da mediana da ASC foi de 11.685 mg/dL-2h para o grupo controle, 13.477 mg/dL-2h para o grupo AZT e 13.650 mg/dL-2h para o grupo TT (p=0,049. Não se observou efeito deletério dos anti-retrovirais sobre as taxas de prematuridade, baixo peso ao nascer, RCIU e índices de Apgar. Não houve nenhum caso de transmissão vertical do HIV-1. CONCLUSÕES: verificou-se o desenvolvimento de intolerância glicêmica em gestantes que utilizaram tratamento tríplice, não sendo observado naquelas que utilizaram apenas AZT. Não houve efeitos deletérios dos anti-retrovirais sobre o prognóstico perinatal.

  15. Procedimiento para la gestión de mantenimiento utilizando herramientas de la cuarta generación

    Directory of Open Access Journals (Sweden)

    Aracelis Barrios

    2013-01-01

    Full Text Available El presente artículo presenta el diseño de un procedimiento para una gestión de mantenimiento sistémico, utilizando un conjunto de herramientas, que enfocan el uso de los recursos de la empresa asociados con las Personas, los Procesos y la Tecnología, orientados a mejorar la productividad, la toma de decisiones acertadas y a maximizar el rendimiento de los equipos, considerando entre otros, los factores de Confiabilidad, Mantenibilidad, Seguridad, Calidad y Medio Ambiente. El desarrollo del procedimiento permite utilizar de manera sistémica, la información obtenida al aplicar el mantenimiento productivo total (TPM, el análisis de modo y efectos de las fallas del mantenimiento centrado en confiabilidad (RCM, para evaluar los riesgos causados por las fallas en los equipos mediante la aplicación de la Lógica Difusa.

  16. Interfaz Gráfica Computacional para Destilación Multicomponente utilizando Métodos Cortos

    OpenAIRE

    A. Osorio Mirón; Gloria Dominguez Hernández

    2011-01-01

    En este trabajo, se elaboró una interfaz gráfica que determina por medio de simulación en estado estacionario el número de platos necesarios en el proceso de destilación multicomponente, así como la composición en el flujo de destilado y fondos de una torre de destilación utilizando métodos cortos. La interfaz gráfica de usuario, se construyó en el lenguaje de programación Python 2.5, permite presentar los datos de entrada y salida para el caso de columnas de destilación operando en régimen p...

  17. Una mejora a la clasificación basada en la medida calidad de la similaridad utilizando relaciones borrosas

    Directory of Open Access Journals (Sweden)

    Yumilka B. Fernández-Hernández

    2015-01-01

    Full Text Available El aprendizaje de reglas de clasificación es un problema clásic o del aprendizaje automático. El algoritmo IRBASIR para la ind ucción de reglas de clasificación basado en relaciones de similaridad per mite descubrir conocimiento a partir de sistemas de decisión qu e contienen rasgos tanto discretos como con tinuos. El mismo ha mostrado obt ener resultados superiores a otro s algoritmos conocidos en este tema. En este artículo se proponen varias modificaciones a este algoritm o basadas en la Teoría de los Conjuntos Borrosos, debido a las ventajas que estos poseen, teniendo en cuenta la medida calidad de similarid ad. Los resultados experimentales muestran que utilizando la Te oría de los Conjuntos Borrosos se obtienen resultados estadísticamente supe riores al algor itmo original.

  18. Desenvolvimento de massas alimenticias instantaneas de arroz, pelo processo de extrusão termoplastica, utilizando farinhas quimicamente modificadas

    OpenAIRE

    Elizabeth Harumi Nabeshima

    2007-01-01

    Resumo: Esta pesquisa consistiu em apresentar uma alternativa de utilização da farinha de arroz através da modificação química (fosfatação ou acetilação), agregando-lhe valor e possibilitando ampliar sua utilização como ingrediente alimentício, especialmente na produção de massas alimentícias instantâneas sem glúten. Inicialmente a farinha de arroz foi modificada quimicamente, sendo acetilada ou fosfatada, utilizando-se anidrido acético (0,465; 1,500; 4,000; 6,500 e 7,535g/100g farinha) ou ox...

  19. Producão de goma xantana por X. Campestris ATCC 13951 utilizando soro de queijo desproteinado

    Directory of Open Access Journals (Sweden)

    Jenny Sobenes G.

    2015-12-01

    Full Text Available A goma xantana é um biopolímero microbiano producido pela bactéria Xanthomonas. O presente trabalho teve como objetivo estudar a produção de goma xantana por processo fermentativo utilizando a linhagem X. campestris ATCC 13951 e como fonte de carbono: soro de queijo desproteinado suplementado com extrato de levedura e sulfato de amônia como fontes de nitrogênio; soro de queijo desproteinado suplementado só com extrato de levedura como fonte de nitrogênio e só soro de queijo desproteinado sem suplementos, tempo de fermentação de 72h para os três meios. Dos meios em análise aquele constituido apenas por soro de queijo desproteinado, atingiu o maior rendimento com valor de 58% e a melhor qualidade de goma.

  20. Nuclear Power

    International Nuclear Information System (INIS)

    Douglas-Hamilton, J.; Home Robertson, J.; Beith, A.J.

    1987-01-01

    In this debate the Government's policy on nuclear power is discussed. Government policy is that nuclear power is the safest and cleanest way of generating electricity and is cheap. Other political parties who do not endorse a nuclear energy policy are considered not to be acting in the people's best interests. The debate ranged over the risks from nuclear power, the UK safety record, safety regulations, and the environmental effects of nuclear power. The Torness nuclear power plant was mentioned specifically. The energy policy of the opposition parties is strongly criticised. The debate lasted just over an hour and is reported verbatim. (UK)

  1. Gestión Tributaria utilizando metodología de problemas (ABP) 2. Sesión Vídeo 2/2

    OpenAIRE

    Bonet, Pilar

    2009-01-01

    Clase de Derecho Financiero y Tributario I, Grupo 4B de ADE-Derecho, 4 marzo 2009, profa. Pilar Bonet: Gestión Tributaria, utilizando metodología de problemas (ABP), 2. sesión. Facultat de Dret Universitat de ValènciaDuración: 41M

  2. Gestión Tributaria, utilizando metodología de problemas (ABP) 2. Sesión Vídeo 1/2

    OpenAIRE

    Bonet, Pilar

    2009-01-01

    Clase de Derecho Financiero y Tributario I, Grupo 4B de ADE-Derecho, 4 marzo 2009, profa. Pilar Bonet: Gestión Tributaria, utilizando metodología de problemas (ABP), 2. sesión. Facultat de Dret Universitat de ValènciaDuración: 1H 19M

  3. JPRS Report, Nuclear Developments

    National Research Council Canada - National Science Library

    1991-01-01

    Partial Contents: Medium Range Missiles, Rocket Engine, Nuclear Submarine, Nuclear Reactor, Nuclear Inspection, Nuclear Weapons, Transfer Technology, Scud, Safety, Nuclear Power, Chernobyl Trial, ,CHemical Weapons...

  4. Nuclear forensics

    International Nuclear Information System (INIS)

    Venugopal, V.

    2010-01-01

    Nuclear forensics is the analysis of nuclear materials recovered from either the capture of unused materials, or from the radioactive debris following a nuclear explosion and can contribute significantly to the identification of the sources of the materials and the industrial processes used to obtain them. In the case of an explosion, nuclear forensics can also reconstruct key features of the nuclear device. Nuclear forensic analysis works best in conjunction with other law enforcement, radiological protection dosimetry, traditional forensics, and intelligence work to provide the basis for attributing the materials and/or nuclear device to its originators. Nuclear forensics is a piece of the overall attribution process, not a stand-alone activity

  5. Nuclear power

    International Nuclear Information System (INIS)

    1987-01-01

    ''Nuclear Power'' describes how a reactor works and examines the different designs including Magnox, AGR, RBMK and PWR. It charts the growth of nuclear generation in the world and its contributions to world energy resources. (author)

  6. Nuclear Scans

    Science.gov (United States)

    Nuclear scans use radioactive substances to see structures and functions inside your body. They use a special ... images. Most scans take 20 to 45 minutes. Nuclear scans can help doctors diagnose many conditions, including ...

  7. Nuclear energy

    International Nuclear Information System (INIS)

    Kuhn, W.

    1986-01-01

    This loose-leaf collection is made up of five didactically prepared units covering the following subjects: basic knowledge on nuclear energy, nuclear energy in relation to energy economy, site issues, environmental compatibility of nuclear energy, and nuclear energy in the focus of political and social action. To this was added a comprehensive collection of material: specific scientific background material, a multitude of tables, diagrams, charts etc. for copying, as well as 44 transparent charts, mostly in four colours. (orig./HP) [de

  8. Nuclear structure

    International Nuclear Information System (INIS)

    Eastham, D.A.; Joy, T.

    1986-01-01

    The paper on 'nuclear structure' is the Appendix to the Daresbury (United Kingdom) Annual Report 1985/86, and contains the research work carried out at the Nuclear Structure Facility, Daresbury, within that period. During the year a total of 74 experiments were scheduled covering the main areas of activity including: nuclear collective motion, nuclei far from stability, and nuclear collisions. The Appendix contains brief reports on these experiments and associated theory. (U.K.)

  9. Nuclear terrorism

    International Nuclear Information System (INIS)

    2002-01-01

    Recent reports of alleged terrorist plans to build a 'dirty bomb' have heightened longstanding concerns about nuclear terrorism. This briefing outlines possible forms of attack, such as: detonation of a nuclear weapon; attacks involving radioactive materials; attacks on nuclear facilities. Legislation addressing these risks and the UK's strategy for coping with them are also considered

  10. Nuclear power

    International Nuclear Information System (INIS)

    d'Easum, Lille.

    1976-03-01

    An environmentalist's criticism of nuclear energy is given, on a layman's level. Such subjects as conflict of interest in controlling bodies, low-level radiation, reactor safety, liability insurance, thermal pollution, economics, heavy water production, export of nuclear technology, and the history of the anti-nuclear movement are discussed in a sensationalistic tone. (E.C.B.)

  11. Nuclear alerts

    International Nuclear Information System (INIS)

    Anon.

    1983-01-01

    Anti-nuclear demonstrations against the deployment of new US missiles were held in Nato Europe. As no agreement has yet been reached at the US-Soviet Intermediate Nuclear Forces talks in Geneva, the deployment of nuclear missiles in Europe has started

  12. Nuclear questions

    International Nuclear Information System (INIS)

    Berg, Eugene

    2012-01-01

    Civilian and military nuclear questions fill a multitude of publications these days, especially after the Japanese tsunami and the Fukushima disaster. The author analyses some of them and highlights the links between civil and military nuclear industries, the realities of the nuclear cycle and related industrial questions before concluding on the controversial issue of weapons and their proliferation potential

  13. Nuclear decommissioning

    International Nuclear Information System (INIS)

    Anon.

    1987-01-01

    The paper on nuclear decommissioning was presented by Dr H. Lawton to a meeting of the British Nuclear Energy Society and Institution of Nuclear Engineers, 1986. The decommissioning work currently being undertaken on the Windscale advanced gas cooled reactor (WAGR) is briefly described, along with projects in other countries, development work associated with the WAGR operation and costs. (U.K.)

  14. Nuclear electronics

    International Nuclear Information System (INIS)

    Friese, T.

    1981-09-01

    A short survey is given on nuclear radiation detectors and nuclear electronics. It is written for newcomers and those, who are not very familiar with this technique. Some additional information is given on typical failures in nuclear measurement systems. (orig.) [de

  15. Nuclear energy

    International Nuclear Information System (INIS)

    2007-01-01

    This digest document was written by members of the union of associations of ex-members and retired people of the Areva group (UARGA). It gives a comprehensive overview of the nuclear industry world, starting from radioactivity and its applications, and going on with the fuel cycle (front-end, back-end, fuel reprocessing, transports), the nuclear reactors (PWR, BWR, Candu, HTR, generation 4 systems), the effluents from nuclear facilities, the nuclear wastes (processing, disposal), and the management and safety of nuclear activities. (J.S.)

  16. Nuclear orientation and nuclear structure

    International Nuclear Information System (INIS)

    Krane, K.S.

    1988-01-01

    The present generation of on-line nuclear orientation facilities promises to revolutionize the gathering of nuclear structure information, especially for the hitherto poorly known and understood nuclei far from stability. Following a brief review of the technological developments that have facilitated these experiments, the nuclear spectroscopic information that can be obtained is summarized. Applications to understanding nuclear structure are reviewed, and challenges for future studies are discussed. (orig.)

  17. Nuclear power

    International Nuclear Information System (INIS)

    Anon.

    1980-01-01

    The committee concludes that the nature of the proliferation problem is such that even stopping nuclear power completely could not stop proliferation completely. Countries can acquire nuclear weapons by means independent of commercial nuclear power. It is reasonable to suppose if a country is strongly motivated to acquire nuclear weapons, it will have them by 2010, or soon thereafter, no matter how nuclear power is managed in the meantime. Unilateral and international diplomatic measures to reduce the motivations that lead to proliferation should be high on the foreign policy agenda of the United States. A mimimum antiproliferation prescription for the management of nuclear power is to try to raise the political barriers against proliferation through misuse of nuclear power by strengthening the Non-Proliferation Treaty, and to seek to raise the technological barriers by placing fuel-cycle operations involving weapons-usable material under international control. Any such measures should be considered tactics to slow the spread of nuclear weapons and thus earn time for the exercise of statesmanship. The committee concludes the following about technical factors that should be considered in formulating nuclear policy: (1) rate of growth of electricity use is a primary factor; (2) growth of conventional nuclear power will be limited by producibility of domestic uranium sources; (3) greater contribution of nuclear power beyond 400 GWe past the year 2000 can only be supported by advanced reactor systems; and (4) several different breeder reactors could serve in principle as candidates for an indefinitely sustainable source of energy

  18. Nuclear physics

    International Nuclear Information System (INIS)

    Kamal, Anwar

    2014-01-01

    Explains the concepts in detail and in depth. Provides step-by-step derivations. Contains numerous tables and diagrams. Supports learning and teaching with numerous worked examples, questions and problems with answers. Sketches also the historical development of the subject. This textbook explains the experimental basics, effects and theory of nuclear physics. It supports learning and teaching with numerous worked examples, questions and problems with answers. Numerous tables and diagrams help to better understand the explanations. A better feeling to the subject of the book is given with sketches about the historical development of nuclear physics. The main topics of this book include the phenomena associated with passage of charged particles and radiation through matter which are related to nuclear resonance fluorescence and the Moessbauer effect., Gamov's theory of alpha decay, Fermi theory of beta decay, electron capture and gamma decay. The discussion of general properties of nuclei covers nuclear sizes and nuclear force, nuclear spin, magnetic dipole moment and electric quadrupole moment. Nuclear instability against various modes of decay and Yukawa theory are explained. Nuclear models such as Fermi Gas Model, Shell Model, Liquid Drop Model, Collective Model and Optical Model are outlined to explain various experimental facts related to nuclear structure. Heavy ion reactions, including nuclear fusion, are explained. Nuclear fission and fusion power production is treated elaborately.

  19. Nuclear chemistry

    International Nuclear Information System (INIS)

    Vertes, A.; Kiss, I.

    1987-01-01

    This book is an introduction to the application of nuclear science in modern chemistry. The first group of chapters discuss the basic phenomena and concepts of nuclear physics with emphasis on their relation to chemical problems, including the main properties and the composition of atomic nuclei, nuclear reactions, radioactive decay and interactions of radiation with matter. These chapters provide the basis for understanding the following chapters which encompass the wide scope of nuclear chemistry. The methods of the investigation of chemical structure based on the interaction of nuclear radiation with matter including positronium chemistry and other exotic atoms is elaborated in particular detail. Separate chapters are devoted to the use of radioactive tracers, the chemical consequences of nuclear processes (i.e. hot atom chemistry), radiation chemistry, isotope effects and their applications, and the operation of nuclear reactors

  20. Nuclear chemistry

    International Nuclear Information System (INIS)

    Vertes, A.; Kiss, I.

    1987-01-01

    This book is an introduction to the application of nuclear science in modern chemistry. The first group of chapters discuss the basic phenomena and concepts of nuclear physics with emphasis on their relation to chemical problems, including the main properties and the composition of atomic nuclei, nuclear reactions, radioactive decay and interactions of radiation with matter. These chapters provide the basis for understanding the following chapters which encompass the wide scope of nuclear chemistry. The methods of the investigation of chemical structure based on the interaction of nuclear radiation with matter including positronium chemistry and other exotic atoms is elaborated in particular detail. Separate chapters are devoted to the use of radioactive tracers, the chemical consequences of nuclear processes (i.e. hot atom chemistry), radiation chemistry, isotope effects and their applications, and the operation of nuclear reactors. (Auth.)

  1. Nuclear forensics

    International Nuclear Information System (INIS)

    Karadeniz, O.; Guenalp, G.

    2010-01-01

    This review discusses the methodology of nuclear forensics and illicit trafficking of nuclear materials. Nuclear forensics is relatively new scientific branch whose aim it is to read out material inherent from nuclear material. Nuclear forensics investigations have to be considered as part of a comprehensive set of measures for detection,interception, categorization and characterization of illicitly trafficking nuclear material. Prevention, detection and response are the main elements in combating illicit trafficking. Forensics is a key element in the response process. Forensic science is defined as the application of a broad spectrum of sciences to answer questions of interest to the legal system. Besides, in this study we will explain age determination of nuclear materials.

  2. Nuclear fuels

    International Nuclear Information System (INIS)

    Gangwani, Saloni; Chakrabortty, Sumita

    2011-01-01

    Nuclear fuel is a material that can be consumed to derive nuclear energy, by analogy to chemical fuel that is burned for energy. Nuclear fuels are the most dense sources of energy available. Nuclear fuel in a nuclear fuel cycle can refer to the fuel itself, or to physical objects (for example bundles composed of fuel rods) composed of the fuel material, mixed with structural, neutron moderating, or neutron reflecting materials. Long-lived radioactive waste from the back end of the fuel cycle is especially relevant when designing a complete waste management plan for SNF. When looking at long-term radioactive decay, the actinides in the SNF have a significant influence due to their characteristically long half-lives. Depending on what a nuclear reactor is fueled with, the actinide composition in the SNF will be different. The following paper will also include the uses. advancements, advantages, disadvantages, various processes and behavior of nuclear fuels

  3. Nuclear networking.

    Science.gov (United States)

    Xie, Wei; Burke, Brian

    2017-07-04

    Nuclear lamins are intermediate filament proteins that represent important structural components of metazoan nuclear envelopes (NEs). By combining proteomics and superresolution microscopy, we recently reported that both A- and B-type nuclear lamins form spatially distinct filament networks at the nuclear periphery of mouse fibroblasts. In particular, A-type lamins exhibit differential association with nuclear pore complexes (NPCs). Our studies reveal that the nuclear lamina network in mammalian somatic cells is less ordered and more complex than that of amphibian oocytes, the only other system in which the lamina has been visualized at high resolution. In addition, the NPC component Tpr likely links NPCs to the A-type lamin network, an association that appears to be regulated by C-terminal modification of various A-type lamin isoforms. Many questions remain, however, concerning the structure and assembly of lamin filaments, as well as with their mode of association with other nuclear components such as peripheral chromatin.

  4. Paralelización del Algoritmo Expectación–Maximización Utilizando OpenCL

    Directory of Open Access Journals (Sweden)

    Ernesto Insua-Suárez

    2014-12-01

    Full Text Available Actualmente, las organizaciones y empresas almacenan grandes volúmenes de datos para lograr sus propósitos. Una de las variantes para obtener información valiosa consiste en el empleo de la Minería de datos. Dentro de esta, existen diferentes tareas, una de ellas es el agrupamiento. En esta tarea los datos se agrupan según sus semejanzas entre si y diferencias con elementos de otros grupos. Dentro de los algoritmos que realizan estos agrupamientos se encuentra Expectación-Maximización, el cual presenta elevados tiempos de ejecución en la medida que aumenta el tamaño de los datos. En el presente artículo se discute acerca de la paralelización del algoritmo, utilizando técnicas de programación paralela. El diseño del algoritmo propuesto se basa en el uso de las tarjetas de procesamiento gráfico, GPU. OpenCL, lenguaje empleado para la programación en arquitecturas híbridas, permite aprovechar las arquitecturas de hardware disponibles, con lo que se logra disminuir el tiempo de ejecución de la implementación realizada. La razón principal por lo cual es posible mejorar este tiempo se debe a la cantidad de procesos paralelos que se pueden lanzar en hilos de procesamientos independientes. Para el logro de los resultados descritos se integran conocimientos del campo de la Minería de datos y la Computación Paralela y Distribuida. Como parte de esta investigación, se realizó una implementación del algoritmo utilizando las bibliotecas de OpenCL, para disminuir su tiempo de ejecución. La implementación logra disminuir en un 82% la implementación secuencial. Esto significa que el algoritmo paralelo se ejecuta 5,5 veces más rápido que su correspondiente implementación secuencial.

  5. Nuclear blackmail and nuclear balance

    International Nuclear Information System (INIS)

    Betts, R.K.

    1987-01-01

    This book raises pointed questions about nuclear saber rattling. More than a dozen cases since the bombing of Hiroshima and Magasaki in which some sort of nuclear threat was used as a sparring technique in tense confrontations are cited. Each incident is described and analyzed. Two theories offered to explain America's use of nuclear threats, the balance of interest theory and the balance of power theory, are contrasted throughout the book. This book helps to fill the gap in the understanding of nuclear weapons and their uses, while pointing out that nuclear bravado could lead to an unintended unleashing of these weapons

  6. Reserve osmosis and its application in water desalination; Osmosis inversa y su aplicacion en la desalacion de las aguas

    Energy Technology Data Exchange (ETDEWEB)

    Lazaro, I. [Departamento de Ingenieria Aplicada, EPS Universidad Murcia, Cartagena (Spain); Almela, L. [Departamento de Quimica Agricola, Universidad de Murcia, Murcia (Spain); Huete, J.

    1996-08-01

    The limited availability of water resources raises two fundamental issues: those of restructuring traditional irrigated land and scarching for new resources to alleviate water shortage. Among the diverse methods that can be utilized for the desalination of water, reverse osmosis is now of great importance. One the advantages of this techniques is that it can be applied equally to big installations as to smaller rural holdings. This paper briefly describes the different methods of desalination, placing emphasis on reverse osmosis. (Author) 8 refs.

  7. Nuclear energy and nuclear weapons

    International Nuclear Information System (INIS)

    Robertson, J.A.L.

    1983-06-01

    We all want to prevent the use of nuclear weapons. The issue before us is how best to achieve this objective; more specifically, whether the peaceful applications of nuclear energy help or hinder, and to what extent. Many of us in the nuclear industry are working on these applications from a conviction that without peaceful nuclear energy the risk of nuclear war would be appreciably greater. Others, however, hold the opposite view. In discussing the subject, a necessary step in allaying fears is understanding some facts, and indeed facing up to some unpalatable facts. When the facts are assessed, and a balance struck, the conclusion is that peaceful nuclear energy is much more part of the solution to preventing nuclear war than it is part of the problem

  8. Nuclear materials

    International Nuclear Information System (INIS)

    1996-01-01

    In 1998, Nuclear Regulatory Authority of the Slovak Republic (NRA SR) performed 38 inspections, 25 of them were performed in co-operation with IAEA inspectors. There is no fresh nuclear fuel at Bohunice A-1 NPP at present. Fresh fuel of Bohunice V-1 and V-2 NPPs is inspected in the fresh fuel storage.There are 327 fresh fuel assemblies in Mochovce NPP fresh fuel storage. In addition to that, are also 71 small users of nuclear materials in Slovakia. In most cases they use: covers made of depleted uranium for non-destructive works, detection of level in production plants, covers for therapeutical sources at medical facilities. In. 1995, NRA SR issued 4 new licences for nuclear material withdrawal. In the next part manipulation with nuclear materials, spent fuel stores and illegal trafficking in nuclear materials are reported

  9. Nuclear Law

    International Nuclear Information System (INIS)

    Wiesbauer, Bruno

    1978-01-01

    This book is the first attempt of a comprehensive compilation of national Austrian Nuclear Law (Nuclear Liability Act; Radiation protection Act, Radiation Protection Ordinance, Security Control Act, Act on the uses of Nuclear Energy - Zwentendorf Nuclear Power Plant) and the most important international agreements to which Austria is a party. Furthermore, the book contains the most important Nuclear Liability Conventions to which Austria is not yet a party, but which are applicable in neighbouring; the Paris Convention served as a model for the national Nuclear Liability Act and may be used for its interpretation. The author has translated a number of international instruments into German, such as the Expose des Motifs of the Paris Convention. (NEA) [fr

  10. Nuclear nonproliferation

    International Nuclear Information System (INIS)

    Neubert, M.

    1992-01-01

    The following motion was put before the United Kingdom House of Commons on 3rd February 1992 and agreed; that this House, recognising the potential dangers of the rapidly changing world order, welcomes the recent proposals for substantial reductions in nuclear weaponry, the growing support for the non-proliferation treaty and progress in the implementation of the United Nations Security Council Resolutions concerning the dismantling of Iraqi nuclear, chemical and biological capabilities; urges the Government to play their full part in helping the relevant authorities in the Commonwealth of Independent States to dismantle their nuclear devices, to safeguard their nuclear components and to discourage the proliferation of nuclear expertise; and believes it is of the first importance that Britain retains an effective and credible minimum nuclear deterrent as security in a world where there remain many sources of instability. The record of arguments for and against the motion in the debate is presented. (author)

  11. Nuclear energy

    International Nuclear Information System (INIS)

    Panait, A.

    1994-01-01

    This is a general report presenting the section VII entitled Nuclear Power of the National Conference on Energy (CNE '94) held in Neptun, Romania, on 13-16 June 1994. The problems addressed were those relating to electric power produced by nuclear power plant, to heat secondary generation, to quality assurance, to safety, etc. A special attention was paid to the commissioning of the first Romanian nuclear power unit, the Cernavoda-1 reactor of CANDU type. The communications were grouped in four subsections. These were: 1. Quality assurance, nuclear safety, and environmental protection; 2. Nuclear power plant, commissioning, and operation; 3. Nuclear power plant inspection, maintenance, and repairs, heavy water technology; 4. Public opinion education. There were 22 reports, altogether

  12. Nuclear power

    International Nuclear Information System (INIS)

    King, P.

    1990-01-01

    Written from the basis of neutrality, neither for nor against nuclear power this book considers whether there are special features of nuclear power which mean that its development should be either promoted or restrained by the State. The author makes it dear that there are no easy answers to the questions raised by the intervention of nuclear power but calls for openness in the nuclear decision making process. First, the need for energy is considered; most people agree that energy is the power to progress. Then the historicalzed background to the current position of nuclear power is given. Further chapters consider the fuel cycle, environmental impacts including carbon dioxide emission and the greenhouse effect, the costs, safety and risks and waste disposal. No conclusion either for or against nuclear power is made. The various shades of opinion are outlined and the arguments presented so that readers can come to their own conclusions. (UK)

  13. Nuclear power

    International Nuclear Information System (INIS)

    Porter, Arthur.

    1980-01-01

    This chapter of the final report of the Royal Commission on Electric Power Planning in Ontario updates its interim report on nuclear power in Ontario (1978) in the light of the Three Mile Island accident and presents the commission's general conclusions and recommendations relating to nuclear power. The risks of nuclear power, reactor safety with special reference to Three Mile Island and incidents at the Bruce generating station, the environmental effects of uranium mining and milling, waste management, nuclear power economics, uranium supplies, socio-political issues, and the regulation of nuclear power are discussed. Specific recommendations are made concerning the organization and public control of Ontario Hydro, but the commission concluded that nuclear power is acceptable in Ontario as long as satisfactory progress is made in the disposal of uranium mill tailings and spent fuel wastes. (LL)

  14. Análise Regional para Implantação de Aterro Sanitário Utilizando Software Livre

    Directory of Open Access Journals (Sweden)

    Carina Barbosa Colman

    2016-09-01

    Full Text Available Áreas com aptidão para implantação de aterro sanitário na região Sul do Estado de Mato Grosso do Sul, foram identificadas por meio de Sistemas de Informações Geográficas (SIG utilizando análise multicritério. Atribuíram-se pesos diferenciados para a determinação de áreas consideradas com ou sem restrição para instalação do referido aterro. As classes mais propícias para a instalação do aterro apresentam as maiores áreas (220.800 hectares, representando 78% da área de estudo, nos municípios de Tacuru e Iguatemi. As classes com maior restrição apresentaram-se pouco representativas na área estudada, cabendo ao município de Coronel Sapucaia, o maior quantitativo com cerca de 47 hectares. Fez-se aqui uma primeira aproximação desse tipo de estudo, pois a inclusão de outras variáveis de ordem socioambiental (opinião dos moradores locais,e normas como o Código Florestal e Zoneamento Ecológico Econômico, pode implicar em mais restrições e potencialidades para a localização desse tipo de empreendimento.

  15. CARACTERIZAÇÃO DA VARIABILIDADE GENÉTICA EM COUVE-MANTEIGA UTILIZANDO ISOENZIMAS E RAPD

    Directory of Open Access Journals (Sweden)

    SAWAZAKI HAIKO ENOK

    1997-01-01

    Full Text Available Estudou-se a variabilidade genética em couve (Brassica oleracea L. var. acephala D.C. tipo manteiga por intermédio do polimorfismo enzimático em gel de poliacrilamida e do polimorfismo de DNA, denominado RAPD (Random Amplified Polymorphic DNA, com base na amplificação de segmentos de DNA ao acaso. Avaliaram-se quinze clones de couve-manteiga do Banco Ativo de Germoplasma do Instituto Agronômico (IAC, utilizando-se extratos de folhas para análise de isoenzimas e marcador RAPD com os "primers" dos kits A e B da Operon Technologies. Entre as isoenzimas estudadas, as mais polimórficas foram as fosfoglucomutase (PGM, peroxidase (PRX e esterase (EST, tendo o sistema PGM realizado a melhor caracterização. Verificou-se a ocorrência de variabilidade genética por meio de isoenzimas e RAPD, porém não foi observada a similaridade entre os dendrogramas obtidos por ambos os tipos de marcadores, sugerindo que as isoenzimas forneceram menos informação sobre o genoma. A maior eficácia do RAPD foi devida à possibilidade de processar maior número de análises, evidenciando mais detalhes sobre o genoma.

  16. Enfriamiento de café pergamino seco a granel utilizando aireación mecánica controlada

    Directory of Open Access Journals (Sweden)

    Julio E. Ospina M.

    1992-05-01

    Full Text Available Con el fin de garantizar que el café almacenado a granel conserve su calidad durante el tiempo necesario de almacenamiento, se estudió el enfriamiento del café pergamino seco en silos experimentales de dimensiones: 0.5m x 0.5m y 2.8 m de altura, utilizando aire enfriado mecánicamente. Los rangos estudiados fueron: temperatura de 10 a 220C humedad relativa de 66 a 98%y contenido de humedad del grano de 8 a 13.57% b.h. Durante la etapa de almacenamiento se evaluó la variación de la calidad del café según los criterios de coloración de la almendra, población de microorganismos y prueba de taza; paralelamente se dejaron muestras almacenadas en sacosa las condiciones de Chinchiná, como muestra testigo buscando determinar la bondad del almacenamiento a granel, también se dejó un silo sin aireación para determinar el efecto de la aireación controlada en la calidad del café.

  17. Proyección de cifras de producción de café colombiano utilizando cadenas de Markov

    Directory of Open Access Journals (Sweden)

    Yenny Londoño Salazar

    2013-01-01

    Full Text Available El café es considerado el producto agrícola más importante en Colombia, además de ser un gran símbolo en su carta de presentación; sin embargo, el peso relativo de la caficultura aportado al PIB ha disminuido notablemente en los últimos años, reflejado en un descenso en la producción de sacos de café, situación que afecta directamente la cantidad exportada, dando lugar a una pérdida significativa de participación en el mercado mundial de este producto. En este artículo se presenta un estudio sobre el modelamiento matemático del número de sacos de 60 kg de café exportados, aplicando cadenas de Markov discretas en el estado y continuas en el tiempo, utilizando los datos históricos de producción de café para los meses comprendidos entre enero de 2010 y octubre de 2012. Los resultados obtenidos mediante esta técnica matemática muestran que las metas propuestas por el Comité de Cafeteros no se cumplirán si no hay una intervención eficiente en este mercado.

  18. CARACTERÍSTICAS MORFOLÓGICAS E VARIABILIDADE GENÉTICA DE ARATICUM UTILIZANDO MARCADORES RAPD E MICROSSATÉLITES

    Directory of Open Access Journals (Sweden)

    MARCELA VERSIANI VENÂNCIO PIRES

    2015-03-01

    Full Text Available RESUMO Neste trabalho, objetivou-se avaliar a variabilidade genética da coleção de trabalho de acessos de araticum da Embrapa Cerrados e outros materiais próximos ao Distrito Federal, utilizando marcadores moleculares RAPD, microssatélites e análise de características morfológicas. Folhas de 18 acessos de araticum foram coletadas e utilizadas para a extração das amostras de DNA genômico, as quais foram amplificadas para obtenção de marcadores moleculares RAPD e microssatélites. Na análise morfológica, foram avaliadas 23 características dos acessos de araticum. As dissimilaridades genéticas entre os 18 genótipos de araticum evidenciaram a variabilidade genética dos acessos e as análises de agrupamento levaram à formação de três grupos de similaridade. Verificaram-se coeficientes de dissimilaridades genéticas baixos entre os materiais oriundos da Embrapa Cerrados e altos entre os outros materiais. Esses acessos são importantes fontes de variabilidade para o enriquecimento da atual coleção de trabalho da Embrapa Cerrados e para futuros estudos de caracterização morfológica e agronômica.

  19. Nuclear astrophysics

    International Nuclear Information System (INIS)

    Haxton, W.C.

    1992-01-01

    The problem of core-collapse supernovae is used to illustrate the many connections between nuclear astrophysics and the problems nuclear physicists study in terrestrial laboratories. Efforts to better understand the collapse and mantle ejection are also motivated by a variety of interdisciplinary issues in nuclear, particle, and astrophysics, including galactic chemical evolution, neutrino masses and mixing, and stellar cooling by the emission of new particles. The current status of theory and observations is summarized

  20. Nuclear physics

    International Nuclear Information System (INIS)

    Patel, S.B.

    1991-01-01

    This book is a simple and direct introduction to the tools of modern nuclear physics, both experimental and mathematical. Emphasizes physical intuition and illuminating analogies, rather than formal mathematics. Topics covered include particle accelerators, radioactive series, types of nuclear reactions, detection of the neutrino, nuclear isomerism, binding energy of nuclei, fission chain reactions, and predictions of the shell model. Each chapter contains problems and illustrative examples. Pre-requisites are calculus and elementary vector analysis

  1. Nuclear energy

    International Nuclear Information System (INIS)

    Hesketh, Ross.

    1985-01-01

    The subject is treated under the headings: nuclear energy -what is it; fusion (principles; practice); fission (principles); reactor types and systems (fast (neutron) reactors as breeders; fast reactors; thermal reactors; graphite-moderated thermal reactors; the CANDU reactor; light water reactors - the BWR and the PWR); the nuclear fuel cycle (waste storage; fuel element manufacture; enrichment processes; uranium mining); safety and risk assessment; the nuclear power industry and the economy (regulating authorities; economics; advantages and disadvantages). (U.K.)

  2. Nuclear Asia

    National Research Council Canada - National Science Library

    Ferguson, Joseph; Tarleton, Gael

    2004-01-01

    .... This event was an opportunity for policy makers, security analysts, nuclear scientists and engineers, regional experts, and military planners to share perspectives and identify those issues requiring...

  3. Nuclear cardiology

    International Nuclear Information System (INIS)

    Fish, M.B.

    2002-01-01

    Recent advances in nuclear medicine instrumentation and software, including myocardial perfusion imaging, offer increased accuracy in the detection, diagnosis and prognosis of coronary artery disease. (orig.)

  4. Nuclear medicine

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    The area of nuclear medicine, the development of artificially produced radioactive isotopes for medical applications, is relatively recent. Among the subjects covered in a lengthy discussion are the following: history of development; impact of nuclear medicine; understanding the most effective use of radioisotopes; most significant uses of nuclear medicine radioimmunoassays; description of equipment designed for use in the field of nuclear medicine (counters, scanning system, display systems, gamma camera); description of radioisotopes used and their purposes; quality control. Numerous historical photographs are included. 52 refs

  5. Nuclear Law

    International Nuclear Information System (INIS)

    Pascal, Maurice.

    1979-01-01

    This book on nuclear law is the first of a series of analytical studies to be published by the French Energy Commission (CEA) concerning all the various nuclear activities. It describes national and international legislation applicable in France covering the following main sectors: the licensing procedure for nuclear installations, the law of the sea and nuclear law, the legal system governing radioisotopes, the transport of radioactive materials, third party liability and insurance and radiation protection. In each chapter, the overall analysis is supplemented by the relevant regulatory texts and by organisation charts in annex. (NEA) [fr

  6. Nuclear Safety

    Energy Technology Data Exchange (ETDEWEB)

    Silver, E G [ed.

    1989-01-01

    This document is a review journal that covers significant developments in the field of nuclear safety. Its scope includes the analysis and control of hazards associated with nuclear energy, operations involving fissionable materials, and the products of nuclear fission and their effects on the environment. Primary emphasis is on safety in reactor design, construction, and operation; however, the safety aspects of the entire fuel cycle, including fuel fabrication, spent-fuel processing, nuclear waste disposal, handling of radioisotopes, and environmental effects of these operations, are also treated.

  7. Nuclear power

    International Nuclear Information System (INIS)

    Bupp, I.C.

    1991-01-01

    Is a nuclear power renaissance likely to occur in the United States? This paper investigates the many driving forces that will determine the answer to that question. This analysis reveals some frequently overlooked truths about the current state of nuclear technology: An examination of the issues also produces some noteworthy insights concerning government regulations and related technologies. Public opinion will play a major role in the unfolding story of the nuclear power renaissance. Some observers are betting that psychological, sociological, and political considerations will hod sway over public attitudes. Others wager that economic and technical concerns will prevail. The implications for the nuclear power renaissance are striking

  8. Avaliação de oxigenadores de sangue utilizando principios de transferencia de massa e tecnica de perda de carga

    OpenAIRE

    Luis Melchert Faber Schmutzler

    2004-01-01

    Resumo: Oxigenadores de sangue tipo de membrana são construídos para trocarem gases de respiração através de uma área de contato, a sua chamada área de troca. Devido a características do processo de fabricação, esta área pode softer variações. Neste trabalho procurou-se desenvolver métodos de avaliação da variação desta área, por meio da medição da transferência de massa e da perda de carga. A técnica utilizando transferência de massa gerou dois métodos de avaliação, um utilizando como fase l...

  9. Nuclear stress test

    Science.gov (United States)

    ... Persantine stress test; Thallium stress test; Stress test - nuclear; Adenosine stress test; Regadenoson stress test; CAD - nuclear stress; Coronary artery disease - nuclear stress; Angina - nuclear ...

  10. Nuclear physics for nuclear fusion

    International Nuclear Information System (INIS)

    Li Xingzhong; Liu Bin; Wei Qingming; Ren Xianzhe

    2004-01-01

    The D-T fusion cross-section is calculated using quantum mechanics with the model of square nuclear potential well and Coulomb potential barrier. The agreement between ENDF data and the theoretically calculated results is well in the range of 0.2-280 keV. It shows that the application of Breit-Wigner formula is not suitable for the case of the light nuclei fusion reaction. When this model is applied to the nuclear reaction between the charged particles confined in a lattice, it explains the 'abnormal phenomena'. It implies a prospect of nuclear fusion energy without strong nuclear radiations

  11. Nuclear installations

    International Nuclear Information System (INIS)

    2001-01-01

    This document presents the fulfilling of the Brazilian obligations under the Convention on Nuclear Safety. The Chapter 2 of the document contains some details about the existing Brazilian nuclear installations. Also, safety improvements at Angra 1 and aspects of Angra 2 and 3 are reported

  12. Nuclear safety

    International Nuclear Information System (INIS)

    1991-02-01

    This book reviews the accomplishments, operations, and problems faced by the defense Nuclear Facilities Safety Board. Specifically, it discusses the recommendations that the Safety Board made to improve safety and health conditions at the Department of Energy's defense nuclear facilities, problems the Safety Board has encountered in hiring technical staff, and management problems that could affect the Safety Board's independence and credibility

  13. Nuclear violence

    International Nuclear Information System (INIS)

    Mullen, R.K.

    1987-01-01

    A great deal of attention has been paid in the past decade or so to the characteristics of terrorists and their apparent goals and objectives, capabilities, and evolving strategy and tactics with respect to nuclear terrorism. In contrast, little has been said about the procedural aspects of nuclear terrorism, and even less about the way in which such endeavors can fail. This latter omission is important because it bears directly on the ability to evaluate credibly the potential for nuclear terrorism. Here, the author addresses the requirements inherent in acquiring a nuclear explosive capability by three routes: separation of plutonium from irradiated light or heavy water reactor (LWR or HWR) fuel, processing, or use of separated fissile material, and theft of a nuclear weapon. In addition, he deals with other potential acts of nuclear terrorism: sabotage of power reactors, uranium enrichment facilities and spent nuclear fuel in transport, and dispersal of radioactive materials, in particular, plutonium. He specifically does not look at the design or production of a nuclear weapon. Finally, the discussion here assumes that the terrorist is subnational; that is, a nation is not involved. Also, the discussion of subnational participation does not address the possibility of collusion with insiders

  14. Nuclear installations

    International Nuclear Information System (INIS)

    1998-01-01

    This document presents the fulfilling of the Brazilian obligations under the Convention on Nuclear Safety. The Chapter 2 of the document contains some details about the existing Brazilian nuclear installations. Also, safety improvements at Angra 1 and aspects of Angra 2 and 3 are reported

  15. Nuclear power

    International Nuclear Information System (INIS)

    Abd Khalik Wood

    2003-01-01

    This chapter discuss on nuclear power and its advantages. The concept of nucleus fission, fusion, electric generation are discussed in this chapter. Nuclear power has big potential to become alternative energy to substitute current conventional energy from coal, oil and gas

  16. Nuclear energy

    International Nuclear Information System (INIS)

    1978-01-01

    This brochure is intended as a contribution to a better and more general understanding of one of the most urgent problems of present society. Emphasis is laid on three issues that are always raised in the nuclear debate: 1) Fuel cycle, 2) environmental effects of nuclear power plants, 3) waste disposal problems. (GL) [de

  17. Nuclear pollution

    International Nuclear Information System (INIS)

    Ramade, Francois

    1979-01-01

    In this chapter devoted to nuclear pollution the following topics were studied: fundamentals of radiobiology (ecological importance of the various radioisotopes, biological effects of ionizing radiations); ecological effects of radioactive fallout (contamination of atmosphere, terrestrial ecosystems, oceans). The electronuclear industry and its environmental impact. PWR type reactors, fuel reprocessing plants, contamination of trophic chains by radionuclides released in the environment from nuclear installations [fr

  18. Nuclear lifetimes

    International Nuclear Information System (INIS)

    Caraca, J.M.G.

    1976-01-01

    The importance of the results obtained in experiments of measurement of lifetimes for a detailed knowledge of nuclear structure is referred. Direct methods of measurement of nuclear lifetimes are described, namely, electronic methods, recoil-distance method, doppler shift atenuation method and blocking-method. A brief reference is made to indirect methods for measurement of life-times

  19. Nuclear facts

    International Nuclear Information System (INIS)

    1982-01-01

    The subject is discussed as follows: the case for using nuclear energy (Britain's energy needs; energy policy); safety; transport of spent fuel; radiation (natural radioactivity); environment (land use of nuclear power plants; storage and disposal of radioactive wastes). (U.K.)

  20. Nuclear measurements

    International Nuclear Information System (INIS)

    Schenkel, R.

    2005-01-01

    Nuclear measurements play a fundamental role in the development of nuclear technology and the assurance of its peaceful use. They are also required in many non-power nuclear applications such as in nuclear medicine, agriculture, environmental protection, etc. This presentation will show examples of most recent advances in measurement methodology or technology in the areas described below. The Generation IV International Forum has selected six innovative reactor systems as candidates for a next generation of sustainable, economic and safe nuclear energy systems. The choice of the best options relies heavily on the availability of accurate nuclear data that can only be obtained, in an international effort, using highly specialised facilities. Significant efforts are being directed towards the partitioning and transmutation of highly active nuclear waste. Different concepts involving fast reactors or accelerator-driven systems are being studied in view of their transmutation capabilities. State of the art equipment has been developed to assess basic properties of nuclear fuel at very high burn-up; some fine examples of this work will be shown. Physical and chemical methods play a crucial role in the detection and identification of radioisotopes used in various stages of the nuclear fuel cycle. Radiation measurement techniques are used, for example, to monitor the quantities of uranium, plutonium and other actinide elements in fuel enrichment and reprocessing facilities. Another field of application of physical and chemical methods is the characterisation of nuclear material seized from illicit trafficking. Seized material has to be analysed in order to obtain clues on its origin and intended use and to prevent diversion of nuclear material from the same source in the future. A recent highlight in basic physics relates to nuclear fission and transmutation with high intensity lasers. Ultra-fast high intensity lasers can produce high energy (tens of MeV) photons through

  1. Nuclear rockets

    International Nuclear Information System (INIS)

    Sarram, M.

    1972-01-01

    Nuclear energy has found many applications in space projects. This article deals with these applications. The first application is the use of nuclear energy for the production of electricity in space and the second main application is the use of nuclear energy for propulsion purposes in space flight. The main objective is to develop a 75000 pound thrust flight engine call NERVA by heating liquid hydrogen, in a nuclear reactor, from 420F to 4000 0 F. The paper describes in detail the salient features of the NERVA rocket as well as its comparison with the conventional chemical rockets. It is shown that a nuclear rocket using liquid hydrogen as medium is at least 85% more efficient as compared with the chemical rockets such as those used for the APOLLO moon flight

  2. Nuclear rockets

    Energy Technology Data Exchange (ETDEWEB)

    Sarram, M [Teheran Univ. (Iran). Inst. of Nuclear Science and Technology

    1972-02-01

    Nuclear energy has found many applications in space projects. This article deals with these applications. The first application is the use of nuclear energy for the production of electricity in space and the second main application is the use of nuclear energy for propulsion purposes in space flight. The main objective is to develop a 75000 pound thrust flight engine called NERVA by heating liquid hydrogen in a nuclear reactor. The paper describes in detail the salient features of the NERVA rocket as well as its comparison with the conventional chemical rockets. It is shown that a nuclear rocket using liquid hydrogen as medium is at least 85% more efficient as compared with the chemical rockets such as those used for the APOLLO moon flight.

  3. Nuclear haematology

    International Nuclear Information System (INIS)

    Masjhur, J.S.

    1992-01-01

    Nuclear techniques have been applied to study diagnose and treat various haematological disorders for more than five decades. Two scientists are regarded as pioneers in this field, i.e. John Lawrence who in 1938 used 32 P to treat chronic myeloid leukaemia and George Hevessy who used 32 P labelled erythrocytes to measure blood volume in 1939. At present, many nuclear medicine procedures are available for diagnosis and therapy of a variety of haematological disorders. Although nuclear techniques are somewhat complex, they give direct and quantitative assessment of the kinetics of blood elements as compared to other non-isotopic haematological tests. Basically, equipment required for nuclear haematology is very simple such as well scintillation counters to measure radioactivity in blood samples. More sophisticated equipment like rectilinear scanner or gamma camera is required when imaging is necessary. An overview of the basic principles and clinical applications of nuclear haematology is given

  4. Nuclear forensics

    International Nuclear Information System (INIS)

    Venugopal, V.

    2010-01-01

    Increasing threat by terrorists for a possible nuclear attack is particularly alarming in recent years. The likelihood of such an event is highly uncertain but cannot be ruled out. The consequence of such an event would be highly disastrous and the implications could be far-reaching both socially and politically. It is feared that significant amount of nuclear weapons materials may be kept under poor security. Therefore, there is a greater demand with utmost priority to curb nuclear terrorism by adapting proper security measures. One of the most important measures is to stop illicit trafficking of nuclear materials which are the source of building nuclear explosive devices. According to the IAEA illicit trafficking database (ITDB) report, a total number of 252 incidents were reported in 2006, of which 150 occurred in 2006 and the remaining 102 had taken place prior to that year, mainly in 2005

  5. Nuclear Safety

    International Nuclear Information System (INIS)

    1978-09-01

    In this short paper it has only been possible to deal in a rather general way with the standards of safety used in the UK nuclear industry. The record of the industry extending over at least twenty years is impressive and, indeed, unique. No other industry has been so painstaking in protection of its workers and in its avoidance of damage to the environment. Headings are: introduction; how a nuclear power station works; radiation and its effects (including reference to ICRP, the UK National Radiological Protection Board, and safety standards); typical radiation doses (natural radiation, therapy, nuclear power programme and other sources); safety of nuclear reactors - design; key questions (matters of concern which arise in the public mind); safety of operators; safety of people in the vicinity of a nuclear power station; safety of the general public; safety bodies. (U.K.)

  6. Nuclear proliferation

    International Nuclear Information System (INIS)

    Stencel, S.

    1978-01-01

    The terms and reactions to President Carter's nuclear policy, culminating in the 1978 Nuclear Non-Proliferation Act, are reviewed and analyzed. The new law increases restrictions on nuclear exports, encourages continued use of light water reactors in preference to plutonium-fueled reactors, and emphasizes technical solutions to proliferation problems. Critics of the law point out that it will hurt U.S. trade unfairly, that other countries do not have as many fuel options as the U.S. has, and that nuclear sales have as many political and economic as technical solutions. Compromise areas include new international safety guidelines, the possibility of an international nuclear fuel bank, and a willingness to consider each case on its merits. 21 references

  7. Nuclear privatization

    International Nuclear Information System (INIS)

    Jeffs, E.

    1995-01-01

    The United Kingdom government announced in May 1995 plans to privatize the country's two nuclear generating companies, Nuclear Electric and Scottish Nuclear. Under the plan, the two companies will become operating divisions of a unified holding company, to be called British Electric, with headquarters in Scotland. Britain's nuclear plants were left out of the initial privatization in 1989 because the government believed the financial community would be unwilling to accept the open-ended liability of decommissioning the original nine stations based on the Magnox gas-cooled reactor. Six years later, the government has found a way around this by retaining these power stations in state ownership, leaving the new nuclear company with the eight Advanced Gas-cooled Reactor (AGR) stations and the recently completed Sizewell B PWR stations. The operating Magnox stations are to be transferred to BNFL, which operates two Magnox stations of their own at Calder Hall and Chapelcross

  8. Nuclear haematology

    Energy Technology Data Exchange (ETDEWEB)

    Masjhur, J S

    1993-12-31

    Nuclear techniques have been applied to study diagnose and treat various haematological disorders for more than five decades. Two scientists are regarded as pioneers in this field, i.e. John Lawrence who in 1938 used {sup 32}P to treat chronic myeloid leukaemia and George Hevessy who used {sup 32}P labelled erythrocytes to measure blood volume in 1939. At present, many nuclear medicine procedures are available for diagnosis and therapy of a variety of haematological disorders. Although nuclear techniques are somewhat complex, they give direct and quantitative assessment of the kinetics of blood elements as compared to other non-isotopic haematological tests. Basically, equipment required for nuclear haematology is very simple such as well scintillation counters to measure radioactivity in blood samples. More sophisticated equipment like rectilinear scanner or gamma camera is required when imaging is necessary. An overview of the basic principles and clinical applications of nuclear haematology is given

  9. OBTENCIÓN DE DEXTRANO Y FRUCTOSA, UTILIZANDO RESIDUOS AGROINDUSTRIALES CON LA CEPA Leuconostoc mesenteroides NRRL B512-F

    Directory of Open Access Journals (Sweden)

    Olga Viviana Rodríguez

    2007-06-01

    Full Text Available Debido al gran potencial biotecnológico que presentan los residuos agroindustriales, se desarrolló el presente trabajo para la obtención de oligosacáridos, utilizando como materia prima residuos de cascaras de naranja, piña y cachaza de caña panelera, a escala de laboratorio. Por medio de un diseño experimental se evaluó la concentración y tipo de sustrato y la temperatura del proceso con tres niveles, para lograr la mayor producción. El desarrollo experimental se llevó a cabo con un volumen de 100 mL y 250 mL. En la etapa final se obtuvo como resultado una producción de 3,4 g/L de dextrano y 5,04 g/L de fructosa, utilizando como sustrato cascaras de naranja con estas condiciones: temperatura de 30 °C y concentración de sustrato de 20 g/L; durante el proceso se midieron el consumo de sustrato y la concentración de biomasa y productos. Se observó el desarrollo del microorganismo con los sustratos empleados en la experimentación, sin adición de nutrientes, con una adaptación favorable a éstos. Finalmente, se realizó una caracterización preliminar del polímero obtenido, con lo que se concluyó que puede obtenerse dextrano de grado técnico para su uso como espesante en la industria de alimentos y en el área de tratamiento de aguas residuales como floculante.Due to biotechnological potential that presents the agro-industrial remainders, the present work was developed about obtaining oligosaccharides using like raw material remainders of orange peels, pineapple peels, and panelera cane slowness, at level laboratory. An experimental design was used to evaluate type and concentration of substrate and process temperature at three levels, accordingly the greatest amount of dextran and fructose produced. All volumes worked were 100 mL and 250 mL. In the final phase, the result was a production of dextran 3.4 g/L and fructose 5.04 g/L, using orange peels as substrate, temperature at 30 °C and concentration of substrate of 20 g

  10. Nuclear questions

    Energy Technology Data Exchange (ETDEWEB)

    Durrani, M. [Physics World (United Kingdom)

    2006-01-01

    The future of nuclear power has returned to centre stage. Freezing weather on both sides of the Atlantic and last month's climate-change talks in Montreal have helped to put energy and the future of nuclear power right back on the political agenda. The issue is particularly pressing for those countries where existing nuclear stations are reaching the end of their lives. In the UK, prime minister Tony Blair has commissioned a review of energy, with a view to deciding later this year whether to build new nuclear power plants. The review comes just four years after the Labour government published a White Paper on energy that said the country should keep the nuclear option open but did not follow this up with any concrete action. In Germany, new chancellor and former physicist Angela Merkel is a fan of nuclear energy and had said she would extend the lifetime of its nuclear plants beyond 2020, when they are due to close. However, that commitment has had to be abandoned, at least for the time being, following negotiations with her left-wing coalition partners. The arguments in favour of nuclear power will be familiar to all physicists - it emits almost no carbon dioxide and can play a vital role in maintaining a diverse energy supply. To over-rely on imported supplies of oil and gas can leave a nation hostage to fortune. The arguments against are equally easy to list - the public is scared of nuclear power, it generates dangerous waste with potentially huge clean-up costs, and it is not necessarily cheap. Nuclear plants could also be a target for terrorist attacks. Given political will, many of these problems can be resolved, or at least tackled. China certainly sees the benefits of nuclear power, as does Finland, which is building a new 1600 MW station - the world's most powerful - that is set to open in 2009. Physicists, of course, are essential to such developments. They play a vital role in ensuring the safety of such plants and developing new types of

  11. Estudios de sistemas de cuerpos utilizando técnicas de procesamiento de imágenes

    Directory of Open Access Journals (Sweden)

    Dadamia, Danilo

    2009-01-01

    Full Text Available En el siguiente trabajo se expone una innovación tecnológica, con respecto a las prácticas tradicionales de laboratorio, para el estudio del movimiento de cuerpos en interacción. Se analizan, a través de diferentes técnicas de procesamiento, la superposición de series temporales de imágenes consecutivas. Con el programa desarrollado se facilita el estudio de dichos movimientos. En el marco de la investigación y desarrollo, se describe la propuesta didáctica de una actividad pautada de laboratorio donde se integra la modalidad presencial, la utilización de nuevas tecnologías y el entorno de una plataforma de e-learning. El trabajo que se plantea a los estudiantes es el análisis cualitativo del movimiento, el estudio cuantitativo a partir de mediciones obtenidas utilizando la filmación desde una cámara fotográfica, y la comparación de predicciones teóricas con dichas mediciones. Para integrar la utilización de las nuevas tecnologías en el laboratorio con la modalidad blearning se proponen actividades complementarias como la discusión en un foro. Se describe el contexto, el diseño de la experiencia, y se analizan resultados obtenidos con el desarrollo de la práctica en dos cursos de la asignatura Física I en la Facultad de Ingeniería (UBA.

  12. Control del Nivel de Pulpa en un Circuito de Flotación Utilizando una Estrategia de Control Predictivo

    Directory of Open Access Journals (Sweden)

    Cristián Troncoso G.

    2017-07-01

    Full Text Available Resumen: Este trabajo presenta el diseño y resultados de la implementación de una estrategia de control predictivo para el control del nivel de pulpa de un circuito de flotación primario de una minera ubicada en la tercera región de Chile, el cual está compuesto por cinco bancos de flotación. La estrategia considera una representación de estados que modela el nivel de cada banco (utilizando un modelo de múltiples entradas y una salida, el que es obtenido mediante un procedimiento de identificación de sistemas y utiliza un filtro de Kalman como estimador de estados. Para resolver el problema de optimización que calcula la acción de control a aplicar se utiliza un optimizador basado en algoritmos genéticos. Se presentan los resultados de la estrategia de control propuesta mediante datos experimentales. Abstract: This work presents the design and implementation results of a model predictive control strategy used to control the pulp level of a Rougher flotation circuit in a mine located in the third region of Chile, which is composed by five flotation banks. The strategy considers a state space representation to model the pulp level of each bank (with a multiple input - single output model, which is obtained by a system identification procedure and uses a Kalman filter as a state estimator. To solve the optimization problem that calculates the control law, a genetic algorithm based optimization tool is used. Experimental data is used to show the results of the proposed control strategy. Palabras clave: Control predictivo basado en modelo, Identificación de sistemas y estimación de parámetros, Filtro de Kalman, Rechazo a perturbaciones, Minería, metalurgia, metales y materiales, Keywords: Model predictive control, System identification and parameter estimation, Kalman filter, Disturbance rejection, Mining, metalurgy, metals and materials

  13. Cinemática inversa de robot serial utilizando algoritmo genético basado en MCDS

    Directory of Open Access Journals (Sweden)

    Juan Jairo Vaca González

    2015-04-01

    Full Text Available Los robots manipuladores seriales son herramientas eficaces para realizar tareas repetitivas y de precisión en la industria, siempre que se comprenda la cinemática involucrada en el posicionamiento y orientación del efector final. Este artículo presenta una metodología para resolver el problema cinemático inverso de un robot serial (Melfa RV-2A utilizando un algoritmo genético (AG a partir del modelo cinemático directo Screws (MCDS. Para esto, se obtienen los parámetros Screw que modelan el robot, se calcula el espacio de trabajo asociado y se diseña el AG contemplando una función multi-objetivo de alcance de posición y orientación en que se sitúa el efector final, con respecto a una coordenada y orientación de un punto objetivo establecido. La validación del AG se realiza según la aptitud, el tiempo de convergencia y la cantidad de generaciones usadas por la función para alcanzar el objetivo. Por tanto, la implementación de un AG basado en un MCDS es una herramienta prometedora que podría utilizarse para calcular la cinemática inversa de robots seriales. Esta novedosa implementación permite establecer por primera vez la exposición matricial de un sistema cinemático directo para obtener la solución cinemática inversa de un robot serial. En consecuencia, se demuestra que esta es una metodología factible y eficiente para solucionar la cinemática inversa de cualquier tipo de robot manipulador.

  14. Remoção de nitrato da água utilizando bagaço de caju quimicamente modificado

    Directory of Open Access Journals (Sweden)

    Raimundo Renato Melo Neto

    2013-09-01

    Full Text Available O ânion nitrato (NO-3, devido sua alta solubilidade em água, é um contaminante de difícil remoção. Os métodos atualmente empregados para tratamento de água contaminada por nitrato possuem um elevado custo e não são muito eficientes, já que em alguns casos são gerados resíduos mais tóxicos que o próprio nitrato. Tecnologias contemporâneas empregadas para tratamento de efluentes aquosos têm seus mecanismos baseados no fenômeno de adsorção, em que um sólido poroso é capaz de adsorver determinadas substâncias, quando estas estão em contato. Estas tecnologias são economicamente rentáveis quando são empregados rejeitos agrícolas como adsorventes. Baseado no exposto este trabalho tem como objetivo avaliar a eficiência de remoção de nitrato de água, utilizando bagaço de caju quimicamente modificado. Os estudos foram realizados em batelada. Os ensaios de adsorção evidenciaram que o tratamento do bagaço de caju com NaOH 0,1 mol.L-1  alcançou uma eficiência de remoção de 96%, enquanto que o bagaço sem tratamento obteve remoção de 22%. O mecanismo de adsorção modelou-se a uma cinética de pseudo-segunda ordem e foi mais bem correlacionado com a isoterma de Freundlich.  

  15. Correção de dados agrometeorológicos utilizando métodos estatísticos

    Directory of Open Access Journals (Sweden)

    Ricardo Kazuo Baba

    2014-12-01

    Full Text Available A análise de dados climáticos fornece suporte para a previsão de fenômenos, para a avaliação de dados históricos e para a tomada de decisões, em especial na área agrícola. Garantir a sua qualidade é fundamental. O processo de coleta dos dados, através das estações meteorológicas, pode apresentar problemas, onde inconsistências podem ocorrer. Este artigo apresenta uma abordagem para solução do problema, utilizando técnicas estatísticas e geoestatísticas, na identificação de dados inconsistentes e na estimativa de dados a serem corrigidos ou preenchidos. A implementação destas técnicas, em um banco de dados espacial, apresentou-se como um facilitador na identificação e no preenchimento de dados. Para avaliação destas técnicas foram utilizados dados de temperatura coletadas por estações meteorológicas localizadas no Estado do Paraná. Como resultado, as técnicas de identificação de erros mostraram-se adequadas na consistência de erros básicos e históricos. A validação espacial apresentou baixo desempenho por superestimar a quantidade de dados incorretos. As técnicas utilizadas na estimativa dos dados, Krigagem, Inverso da Distância e Regressão Linear, apresentaram desempenho semelhantes com relação à análise dos erros.

  16. EVALUACIÓN DE ABONOS ORGÁNICOS UTILIZANDO COMO INDICADORES PLANTAS DE LECHUGA Y REPOLLO EN POPAYAN, CAUCA

    Directory of Open Access Journals (Sweden)

    JUAN MANUEL MUÑOZ C

    Full Text Available Este estudio tuvo por objeto de evaluar abonos orgánicos provenientes de residuos de cosecha y plazas de mercado de Popayán, utilizando plantas de repollo y lechuga. Se recolectaron residuos de fincas de café y plazas de mercados de Popayán, se elaboraron pilas de compost separadamente y se analizó cada compost para determinar contenido de nutrientes. Se aplicó compost en dos etapas de cultivo como fertilizante. Se utilizó un diseño completamente al azar con tres tratamientos y tres repeticiones, T0: Testigo, sin abono; T1: compost elaborado de pulpa de café, troncho de plátano y gallinaza y T2: compost elaborado con residuos de plazas de mercado. Las pruebas físico-químicas del compost cumplieron la norma NTC 5167 y la diferencia radicó en que T1 es fuente de K y P y T2 de N; la aplicación del compost al suelo mejoró pH, M.O y CIC; la ganancia promedio en peso para los cultivos supero el 300%; los análisis microbiológicos cumplieron los parámetros de INVIMA de control y vigilancia de calidad de productos alimenticios. Se concluyó que los materiales utilizados para producción de compost influyen en las propiedades físico-químicas del abono orgánico y los compostajes cumplieron con 15 parámetros de la norma NTC 5167.

  17. Degradação de poliolefinas utilizando catalisadores zeolíticos Degradation of polyolefins using zeolitic catalysts

    Directory of Open Access Journals (Sweden)

    Maria Letícia M. Valle

    2004-03-01

    Full Text Available Neste trabalho foi estudada a degradação de alguns dos principais constituintes dos rejeitos plásticos (polietileno de alta densidade (HDPE, polietileno de baixa densidade (LDPE e polipropileno (PP, empregando-se um catalisador exausto de unidades de craqueamento de fluidos (FCC e um catalisador zeolítico (ADZ3 sintetizado em laboratório. Utilizando técnicas de termogravimetria (TG-DTG e cromatografia gasosa (CG, foi possível avaliar os produtos gerados no craqueamento destas poliolefinas. Na degradação catalítica de poliolefinas com catalisadores zeolíticos, verificou-se a obtenção preferencial de gasolina, GLP e diesel, produtos importantes na matriz energética brasileira. O catalisador de FCC exausto foi mais seletivo para a produção de gasolina e GLP, enquanto que a produção de diesel foi mais favorecida com o catalisador ADZ3.In this work the degradation of some of the main plastics responsible for waste, viz. high density polyethylene (HDPE, low density polyethylene (LDPE and polypropylene (PP, was studied using a spent FCC catalyst (fluid cracking catalyst and a zeolitic catalyst (ADZ3 synthesized in laboratory. Using thermogravimetry (TG-DTG and gas chromatography (GC techniques, it was possible to evaluate the products from these polyolefins cracking. The catalytic degradation of polyolefins led to a preferential production of LPG, diesel and gasoline, which are important products of the Brazilian energetic matrix. The spent FCC catalyst was more selective for production of LPG and gasoline, whereas the diesel production was more favored with the ADZ3 catalyst.

  18. Nuclear energy

    International Nuclear Information System (INIS)

    Rippon, S.

    1984-01-01

    Do we need nuclear energy. Is it safe. What are the risks. Will it lead to proliferation. The questions are endless, the answers often confused. In the vigorous debates that surround the siting and operation of nuclear power plants, it is all too easy to lose sight of the central issues amid the mass of arguments and counter-arguments put forward. And there remains the doubt, who do we believe. This book presents the facts, simply, straightforwardly, and comprehensibly. It describes the different types of nuclear reactor, how they work, how energy is produced and transformed into usable power, how nuclear waste is handled, what safeguards are built in to prevent accident, contamination and misuse. More important, it does this in the context of the real world, examining the benefits as well as the dangers of a nuclear power programme, quantifying the risks, and providing an authoritative account of the nuclear industry worldwide. Technically complex and politically controversial, the contribution of nuclear energy to our future energy requirements is a crucial topic of our time. (author)

  19. Nuclear Hostages

    International Nuclear Information System (INIS)

    Cooper, C.L.

    1978-01-01

    The global spread of nuclear reactors for the production of energy seems inevitable. Nuclear power plants will be supplied--if not by the United States, then by one of several other exporters. But other aspects of this development are less certain. One is the relationship between proliferation of nuclear energy plants and that of nuclear weapons. Another is the actual constraint that such vulnerable potential targets as nuclear power plants would have on would-be aggressors. In the last analysis, this would depend on the rationality of a nation's leadership. What can be said for the concept of nuclear power plants as potential hostages is that by installing a reactor on its territory, a country increases its vulnerability to grave, possibly unacceptable damage in the event of war. As a result, that nation's leaders might be inclined to raise the threshold of their sensitivity to provocation by neighbors and to restrain their own inclinations toward aggression. Admittedly this is a frail substitute for robust international agreements, but in the present order of things it is not a trivial consideration. Many incidents once regarded by the great powers as easi belli have more recently been either resolved by diplomacy or ignored altogether. The idea must not be pressed too far. The export of a nuclear power plant to a Third World country cannot be advocated simply as a means to constrain its own military adventurism. Aside from the promise of a vast increase in energy supply for developing nations, nuclear powered generating stations could actually improve relations among countries. The risk of widespread radioactive contamination by nuclear power plants hit by even conventional bombs could introduce a positive new element into the military calculations of powers outside the NATO-Warsaw Pact arena. As they balance military and diplomatic solutions to local conflicts, moderation rather than bellicosity might become the better part of valor

  20. Nuclear medicine

    International Nuclear Information System (INIS)

    Kand, Purushottam

    2012-01-01

    Nuclear medicine is a specialized area of radiology that uses very small amounts of radioactive materials to examine organ function and structure. Nuclear medicine is older than CT, ultrasound and MRI. It was first used in patients over 60-70 years ago. Today it is an established medical specialty and offers procedures that are essential in many medical specialities like nephrology, pediatrics, cardiology, psychiatry, endocrinology and oncology. Nuclear medicine refers to medicine (a pharmaceutical) that is attached to a small quantity of radioactive material (a radioisotope). This combination is called a radiopharmaceutical. There are many radiopharmaceuticals like DTPA, DMSA, HIDA, MIBI and MDP available to study different parts of the body like kidneys, heart and bones etc. Nuclear medicine uses radiation coming from inside a patient's body where as conventional radiology exposes patients to radiation from outside the body. Thus nuclear imaging study is a physiological imaging, whereas diagnostic radiology is anatomical imaging. It combines many different disciplines like chemistry, physics mathematics, computer technology, and medicine. It helps in diagnosis and to treat abnormalities very early in the progression of a disease. The information provides a quick and accurate diagnosis of wide range of conditions and diseases in a person of any age. These tests are painless and most scans expose patients to only minimal and safe amounts of radiation. The amount of radiation received from a nuclear medicine procedure is comparable to, or often many times less than, that of a diagnostic X-ray. Nuclear medicine provides an effective means of examining whether some tissues/organs are functioning properly. Therapy using nuclear medicine in an effective, safe and relatively inexpensive way of controlling and in some cases eliminating, conditions such as overactive thyroid, thyroid cancer and arthritis. Nuclear medicine imaging is unique because it provides doctors with

  1. Nuclear inheritance

    International Nuclear Information System (INIS)

    Delpech, Therese

    1997-01-01

    Since the end of the East-West confronting, the nuclear weapon issue has been focused in an international debate with obvious repercussions in Europe, because it is the European continent which indicated first the significance of nuclear deterrence. This debate refers first upon the past, as the German unification allowed capturing numerous documents of Warsaw treaty which revealed the intentions and the plans of Soviet Union during the cold war, and secondly concerns the future, since the role of nuclear weapons must be re-thought in a new context. This is the subject of this book, which refers also to the problem of the nuclear proliferation in the world and evolution of different countries in a political and regional context. The extension of the non-proliferation treaty for an undefined duration, in May 1995, is a incontestable victory because this treaty rules the renouncement to nuclear weapons of 185 countries. However, it does not solve most sensible problems like the Iraq case, for which a specific inspection regime has been instituted, or the case of Iran, which is suspected to acquire the bomb, although no clear evidence has been provided up to now. This is also the case of Israel, India and Pakistan which allege plainly their willingness of keeping open, from security reasons, their nuclear option. The content is displayed in five chapters: 1. Introduction; 2. The role of the nuclear weapons after the cold war; 3. The nuclear proliferation at crossroads; 4. Undefined extension of the NPT, a striking but fragile victory; 5. Conclusions. An appendix containing the text of the Nuclear Weapon Non-Proliferation Treaty and a chronology are added

  2. Nuclear energy

    International Nuclear Information System (INIS)

    Hladky, S.

    1985-01-01

    This booklet appeared in a series on technical history. It tries to communicate some of the scientific, technical and social stresses, which have been connected with the application of nuclear energy since its discovery. The individual sections are concerned with the following subjects: the search for the 'smallest particles'; the atomic nucleus; nuclear fission; the 'Manhattan Project'; the time after this - from the euphoria of the 1950's via disillusionment and change of opinion to the state of nuclear energy at the start of the 1980's. The booklet contains many details and is generously illustrated. (HSCH) [de

  3. Nuclear transport

    International Nuclear Information System (INIS)

    Anon.

    2003-01-01

    During january and february 2003, a unique event concerning nuclear transport was reported and rated 1 on the INES scale. This event concerns the absence of a maintenance operation on a shipping cask. This shipping cask was used for several years for nuclear transport inside La-hague site before being re-assigned to transport on public thoroughfare. The re-assignment of the cask should have been preceded and conditioned by a maintenance operation whose purpose is to check the efficiency of its radiation shield. During this period 2 on-site inspections concerning the transport of nuclear materials were performed. (A.C.)

  4. Nuclear energy

    International Nuclear Information System (INIS)

    Luxo, Armand.

    1977-01-01

    The reasons and conditions of utilizing nuclear power in developing countries are examined jointly with the present status and future uses already evaluated by some organizations. Some consequences are deduced in the human, financial scientific and technological fields, with provisional suggestions for preparing the nuclear industry development in these countries. As a conclusion trends are given to show how the industrialized countries having gained a long scientific and technological experience in nuclear energy can afford their assistance in this field, to developing countries [fr

  5. Nuclear questions

    International Nuclear Information System (INIS)

    Hohlfeld, W.

    1977-01-01

    This brochure 'nuclear problems' deals with the attitude of the protestant church in the region around the northern Elbe towards further quantitative economic growth, esp. nuclear energy, with the following essays: preaching the Gospel in an environment in danger: the Christian occident and the problems of the third world, facing the problems of exhausted supplies, the role of the prophet, problem of environment - a problem of theology, the political dimension, against ATW, signal Brokdorf, strange effects (defense of the church from unqualified teachings by non-professionals), Christian liberty, church and nuclear energy, violence and robes. (HP) [de

  6. Rotterdam Nuclear

    International Nuclear Information System (INIS)

    Anon.

    1975-01-01

    In 1965 Rotterdam Nuclear received an order for the design, supply of materials, manufacture, testing, inspection and preparation for shipment of one 450MW Boiling Water Reactor pressure vessel. This was one of the first orders for a reactor pressure vessel, ever obtained by a European Manufacturer. The Company has since supplied 19 reactor pressure vessels for nuclear power stations, having a total weight of about 10,000,000kg. The nuclear power stations in which these are installed represent an electrical output of about 15,000MW and they are located in seven different countries (USA, Spain, Switzerland, Argentina, Sweden, Germany and the Netherlands). (Auth.)

  7. Nuclear law

    International Nuclear Information System (INIS)

    Bringuier, P.

    2009-01-01

    The object of this report is to present the evolution of the nuclear law during the period from 2006 to 2008, period that was characterized in France by a real rewriting from the implementation of a control authority. The prescriptive backing of nuclear activities has been deeply changed by numerous texts. In this first part are presented: (1) the institutional aspects, (2) openness and public information, (7) radioactive wastes and (9) liability and insurance. In a next publication will be treated: (3) safety and radiation protection; (4) nuclear matter, inspection, physical protection; (5) transports; (6) trade, non-proliferation; (8) radiological accidents. (N.C.)

  8. Nuclear fuel

    International Nuclear Information System (INIS)

    D Hondt, P.

    1998-01-01

    The research and development programme on nuclear fuel at the Belgian Nuclear Research Centre SCK/CEN is described. The objective of this programme is to enhance the quantitative prediction of the operational limits of nuclear fuel and to assess the behaviour of fuel under incidental and accidental conditions. Progress is described in different domains including the modelling of fission gas release in LWR fuel, thermal conductivity, basic physical phenomena, post-irradiation examination for fuel performance assessment, and conceptual studies of incidental and accidental fuel experiments

  9. Nuclear energy

    International Nuclear Information System (INIS)

    Wethe, Per Ivar

    2009-01-01

    Today we know two forms of nuclear energy: fission and fusion. Fission is the decomposition of heavy nuclei, while fusion is the melting together of light nuclei. Both processes create a large surplus of energy. Technologically, we can currently only use fission to produce energy in today's nuclear power plants, but there is intense research worldwide in order to realize a controlled fusion process. In a practical context, today's nuclear energy is a sustained source of energy since the resource base is virtually unlimited. When fusion technology is realized, the resource supply will be a marginal problem. (AG)

  10. Nuclear electronics

    International Nuclear Information System (INIS)

    Lucero B, E.

    1989-01-01

    The rapid technical development of Colombia over the past years, resulted among others, a considerable increase in the number of measuring instrumentation and testing laboratories, scientific research and metrology centers, in industry, agriculture, public health, education on the nuclear field, etc. IAN is a well organized institution with qualified management, trained staff and reasonably equipped laboratories to carry out tasks as: Metrology, standardization, quality control and maintenance and repair of nuclear instruments. The government of Colombia has adopted a policy to establish and operate through the country maintenance and repair facilities for nuclear instrumentation. This policy is reflected in the organization of electronic laboratories in Bogota-IAN

  11. Nuclear wastes

    International Nuclear Information System (INIS)

    2002-01-01

    This scientific document presents an introduction to the nuclear wastes problems, the separation process and the transmutation, the political and technical aspects of the storage, the radioprotection standards and the biological effects. (A.L.B.)

  12. Nuclear Disarmament.

    Science.gov (United States)

    Johnson, Christopher

    1982-01-01

    Material about nuclear disarmament and the arms race should be included in secondary school curricula. Teachers can present this technical, controversial, and frightening material in a balanced and comprehensible way. Resources for instructional materials are listed. (PP)

  13. Nuclear analysis

    International Nuclear Information System (INIS)

    1988-01-01

    Basic studies in nuclear analytical techniques include the examination of underlying assumptions and the development and extention of techniques involving the use of ion beams for elemental and mass analysis. 1 ref., 1 tab

  14. Nuclear reaction

    CERN Multimedia

    Penwarden, C

    2001-01-01

    At the European Research Organization for Nuclear Research, Nobel laureates delve into the mysteries of particle physics. But when they invited artists from across the continent to visit their site in Geneva, they wanted a new kind of experiment.

  15. [Nuclear theory

    International Nuclear Information System (INIS)

    1989-06-01

    This report discusses concepts in nuclear theory such as: neutrino nucleosynthesis; double beta decay; neutrino oscillations; chiral symmetry breaking; T invariance; quark propagator; cold fusion; and other related topics

  16. Nuclear constants

    International Nuclear Information System (INIS)

    Foos, J.

    1999-01-01

    This paper is written in two tables. The first one describes the different particles (bosons and fermions). The second one gives the isotopes nuclear constants of the different elements, for Z = 1 to 56. (A.L.B.)

  17. Nuclear constants

    International Nuclear Information System (INIS)

    Foos, J.

    2000-01-01

    This paper is written in two tables. The first one describes the different particles (bosons and fermions). The second one gives the isotopes nuclear constants of the different elements, for Z = 56 to 68. (A.L.B.)

  18. Nuclear constants

    International Nuclear Information System (INIS)

    Foos, J.

    1998-01-01

    This paper is made of two tables. The first table describes the different particles (bosons and fermions) while the second one gives the nuclear constants of isotopes from the different elements with Z = 1 to 25. (J.S.)

  19. Nuclear constants

    International Nuclear Information System (INIS)

    Foos, J.

    1999-01-01

    This paper is written in two tables. The first one describes the different particles (bosons and fermions). The second one gives the isotopes nuclear constants of the different elements, for Z = 56 to 68. (A.L.B.)

  20. Nuclear transmutations

    International Nuclear Information System (INIS)

    Mikulaj, V.

    1992-01-01

    Two types of nuclear transmutations are outlined, namely the radioactive transmutations and nuclear reactions. The basic characteristics are given of radioactive transmutations (gamma transmutations and isomeric transitions, beta, alpha transmutations, spontaneous fission and spontaneous emission of nucleons), their kinetics and the influence of the physical and chemical state of the radionuclide on the transmutation rate. The basic characteristics are described of nuclear reactions (reactions of neutrons including fission, reactions induced by charged particles and photons), their kinetics, effective cross sections and their mechanism. Chemical reactions caused by nuclear transmutations are discussed (recoil energy, properties of hot atoms, Szilard-Chalmers effect). A brief information is given on the behavior of radionuclides in trace concentrations. (Z.S.) 2 tabs., 19 figs., 12 refs

  1. Nuclear waste

    International Nuclear Information System (INIS)

    1992-05-01

    The Nuclear Waste Policy Act of 1982, as amended in 1987, directed the Secretary of Energy to, among other things, investigate Yucca Mountain, Nevada, as a potential site for permanently disposing of highly radioactive wastes in an underground repository. In April 1991, the authors testified on Yucca Mountain project expenditures before your Subcommittee. Because of the significance of the authors findings regrading DOE's program management and expenditures, you asked the authors to continue reviewing program expenditures in depth. As agreed with your office, the authors reviewed the expenditures of project funds made available to the Department of Energy's (DOE) Lawrence Livermore National Laboratory, which is the lead project contractor for developing a nuclear waste package that wold be used for disposing of nuclear waste at Yucca Mountain. This report discusses the laboratory's use of nuclear waste funds to support independent research projects and to manage Yucca Mountain project activities. It also discusses the laboratory's project contracting practices

  2. Nuclear shields

    International Nuclear Information System (INIS)

    Linares, R.C.; Nienart, L.F.; Toelcke, G.A.

    1976-01-01

    A process is described for preparing melt-processable nuclear shielding compositions from chloro-fluoro substituted ethylene polymers, particularly PCTFE and E-CTFE, containing 1 to 75 percent by weight of a gadolinium compound. 13 claims, no drawings

  3. Nuclear option

    International Nuclear Information System (INIS)

    Olson, P.S.

    1983-01-01

    The energy demand complexion of this country is always changing and promises to change in the future. The nuclear industry is responding to changing energy demands through standards writing activities. Since the oil embargo of 1973, there has been a change in the mix of fuels contributing to energy growth in this country; virtually all of the energy growth has come from coal and nuclear power. The predicted expansion of coal use by 1985, over 1977 level, is 37%, while the use of oil is expected to decline by 17%. Use of nuclear power is expected to increase 62% from the 1977 level. The feasibility of using nuclear energy to meet the needs of the USA for electric power is discussed

  4. Nuclear safety

    International Nuclear Information System (INIS)

    Tarride, Bruno

    2015-10-01

    The author proposes an overview of methods and concepts used in the nuclear industry, at the design level as well as at the exploitation level, to ensure an acceptable safety level, notably in the case of nuclear reactors. He first addresses the general objectives of nuclear safety and the notion of acceptable risk: definition and organisation of nuclear safety (relationships between safety authorities and operators), notion of acceptable risk, deterministic safety approach and main safety principles (safety functions and confinement barriers, concept of defence in depth). Then, the author addresses the safety approach at the design level: studies of operational situations, studies of internal and external aggressions, safety report, design principles for important-for-safety systems (failure criterion, redundancy, failure prevention, safety classification). The next part addresses safety during exploitation and general exploitation rules: definition of the operation domain and of its limits, periodic controls and tests, management in case of incidents, accidents or aggressions

  5. Nuclear fission

    International Nuclear Information System (INIS)

    Kodama, T.

    1981-01-01

    The nuclear fission process is pedagogically reviewed from a macroscopic-microscopic point of view. The Droplet model is considered. The fission dynamics is discussed utilizing path integrals and semiclassical methods. (L.C.) [pt

  6. Nuclear physics

    International Nuclear Information System (INIS)

    Connell, K.A.; Warner, D.D.

    1990-01-01

    The first volume of the Annual Report for 1989/90 gives an overview of the Nuclear Structure Facility at Daresbury, its development and a selection of highlights of the year's programme. This volume is complementary, presenting brief specialist reports, submitted by the users, describing the progress and results of each individual proposal. The contents reflect the extremely successful year due in good measure to the performance of the tandem accelerator which provided a record number of hours with ''beam on target''. Reports are grouped in four sections: research into nuclear structure with contributions ordered in increasing Z numbers of the nuclei studied; investigations of nuclear reaction mechanisms; nuclear theory; accelerator operations and development plus experimental instrumentation and techniques. The appendix forms a concise summary of the work at the facility for the year. (author)

  7. Nuclear waste

    International Nuclear Information System (INIS)

    Pligt, J. van der

    1989-01-01

    This chapter present a brief overview of the current situation of siting radioactive wastes. This is followed by an overview of various psychological approaches attempting to analyse public reactions to nuclear facilities. It will be argued that public reactions to nuclear waste factilities must be seen in the context of more general attitudes toward nuclear energy. The latter are not only based upon perceptions of the health and environmental risks but are built on values, and sets of attributes which need not be similar to the representations o the experts and policy-makers. The issue of siting nuclear waste facilities is also embedded in a wider moral and political domain. This is illustrated by the importance of equity issues in siting radioactive wastes. In the last section, the implications of the present line of argument for risk communication and public participation in decisions about siting radioactive wastes will be briefly discussed. (author). 49 refs

  8. Producción de Biogás a Nivel Laboratorio Utilizando Estiércol de Cabras Producción de Biogás a Nivel Laboratorio Utilizando Estiércol de Cabras

    Directory of Open Access Journals (Sweden)

    Rosalía Hernández Cantero

    2012-02-01

    Full Text Available Se aplicó el proceso de digestión anaerobia para la obtención de biogás a partir de estiércol de cabras. Para ello se implementaron dos tipos de experimentos: El primero se efectuó mediante dos lotes utilizando matraces kitazato de cristal con una capacidad de 1 litro como depósito de la mezcla agua-excremento. Los matraces kitazato se introdujeron dentro de una tina con agua calentada por una resistencia eléctrica para mantener la temperatura adecuada para el crecimiento de las bacterias metanogénicas. El objetivo de esta experimentación fue determinar la producción diaria de biogás al utilizar estiércol de cabras. El segundo se efectuó mediante un biodigestor a escala de laboratorio. Para ello se procedió primero a pesar las bolitas de estiércol de cabras. En seguida se pasaron a un recipiente en donde se les agregó agua. Luego se procedió a deshacer las bolitas hasta alcanzar una mezcla homogénea y en estas condiciones cargar el biodigestor. Elobjetivo de esta experimentación fue determinar la cantidad de metano del biogás mediante análisis cromatográfico.The anaerobic digestion process was applied in order to get biogas from goat’s manure. Two experiments were implemented. The first one was carried out by means of two lots, using matraces kitazatos of crystal with a capacity of 1 liter, as deposit of the mixture water - excrement. The kitazatos were put inside a tub with water warmed by an electrical resistance in order to supply the adapted temperature for the growth of the methanogenic bacteriums. The aim of this experimentation was to determine the daily production of biogas when goats’ manure is used. The second one was carried out by means of a biodigestor at laboratory scale. The small balls of goats’ manure were weighted and immediately were passed to a container where water was added. Then, these were dissolved in order to obtain a homogeneous mixture that could be loaded into the biodigestor. The aim of

  9. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Physician Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses ... limitations of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of ...

  10. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small amounts ... Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical imaging ...

  11. General Nuclear Medicine

    Science.gov (United States)

    ... Resources Professions Site Index A-Z General Nuclear Medicine Nuclear medicine imaging uses small amounts of radioactive ... of General Nuclear Medicine? What is General Nuclear Medicine? Nuclear medicine is a branch of medical imaging ...

  12. Children's (Pediatric) Nuclear Medicine

    Science.gov (United States)

    ... Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small amounts ... Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical imaging ...

  13. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging ... the limitations of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch ...

  14. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small ... of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical ...

  15. Nuclear instrumentation

    International Nuclear Information System (INIS)

    Weill, Jacky; Fabre, Rene.

    1981-01-01

    This article sums up the Research and Development effort at present being carried out in the five following fields of applications: Health physics and Radioprospection, Control of nuclear reactors, Plant control (preparation and reprocessing of the fuel, testing of nuclear substances, etc.), Research laboratory instrumentation, Detectors. It also sets the place of French industrial activities by means of an estimate of the French market, production and flow of trading with other countries [fr

  16. Nuclear hadrodynamics

    International Nuclear Information System (INIS)

    Geesaman, D.F.

    1984-01-01

    The role of hadron dynamics in the nucleus is illustrated to show the importance of nuclear medium effects in hadron interactions. The low lying hadron spectrum is considered to provide the natural collective variables for nuclear systems. Recent studies of nucleon-nucleon and delta-nucleon interactions are reviewed, with emphasis on the type of experimental phenomena which signal the importance of the many-body dynamics. 28 references

  17. Seguro Nuclear

    International Nuclear Information System (INIS)

    Oliveira, S.C.C. de.

    1978-04-01

    A description of the constitutive elements of insurance and its features in the field of law, and special legislation about the matter are given. The relationship between the liability of the nuclear power plant operator and the international conventions about civil liability on nuclear damage is discussed. Some considerations on damage reparing in the United States, Germany, France and Spain are presented. (A.L.S.L.) [pt

  18. Nuclear medicine

    International Nuclear Information System (INIS)

    Sibille, L.; Nalda, E.; Collombier, L.; Kotzki, P.O.; Boudousq, V.

    2011-01-01

    Nuclear medicine is a medical specialty using the properties of radioactivity. Radioactive markers associated with vectors are used as a tracer or radiopharmaceutical for diagnostic purposes and/or therapy. Since its birth more than half a century ago, it has become essential in the care of many patients, particularly in oncology. After some definitions, this paper presents the main nuclear techniques - imaging for diagnostic, radiopharmaceuticals as therapeutic agents, intra-operative detection, technique of radioimmunoassay - and the future of this field. (authors)

  19. Nuclear waste

    International Nuclear Information System (INIS)

    1988-01-01

    The Department of Energy has proposed a draft plan for investigating the Yucca Mountain, Nevada, site to determine if it suitable for a waste repository. This fact sheet provides information on the status of DOE's and the Nuclear Regulatory Commission's efforts to streamline what NRC expects will be the largest and most complex nuclear-licensing proceeding in history, including the development of an electronic information management system called the Licensing Support System

  20. Nuclear safety

    International Nuclear Information System (INIS)

    Arnott, D.

    1981-01-01

    Dr Arnott, scientific consultant to PANDORA, emphasises our lack of knowledge of the behaviour of highly active radioactive wastes, particularly effluents, and their characteristics. He proposes that they should be stored, preferably in a solidified state, until our knowledge allows their safe disposal. Political aspects and government policies are discussed and human fallibility is stressed. The nuclear establishment and nuclear power programme are severely criticised. (U.K.)

  1. Nuclear astrophysics

    International Nuclear Information System (INIS)

    Lehoucq, Roland; Klotz, Gregory

    2015-11-01

    Astronomy deals with the position and observation of the objects in our Universe, from planets to galaxies. It is the oldest of the sciences. Astrophysics is the study of the physical properties of these objects. It dates from the start of the 20. century. Nuclear astrophysics is the marriage of nuclear physics, a laboratory science concerned with the infinitely small, and astrophysics, the science of what is far away and infinitely large. Its aim is to explain the origin, evolution and abundance of the elements in the Universe. It was born in 1938 with the work of Hans Bethe, an American physicist who won the Nobel Prize for physics in 1967, on the nuclear reactions that can occur at the center of stars. It explains where the incredible energy of the stars and the Sun comes from and enables us to understand how they are born, live and die. The matter all around us and from which we are made, is made up of ninety-two chemical elements that can be found in every corner of the Universe. Nuclear astrophysics explains the origin of these chemical elements by nucleosynthesis, which is the synthesis of atomic nuclei in different astrophysical environments such as stars. Nuclear astrophysics provides answers to fundamental questions: - Our Sun and the stars in general shine because nuclear reactions are taking place within them. - The stars follow a sequence of nuclear reaction cycles. Nucleosynthesis in the stars enables us to explain the origin and abundance of elements essential to life, such as carbon, oxygen, nitrogen and iron. - Star explosions, in the form of supernovae, disperse the nuclei formed by nucleosynthesis into space and explain the formation of the heaviest chemical elements such as gold, platinum and lead. Nuclear astrophysics is still a growing area of science. (authors)

  2. Nuclear physics

    International Nuclear Information System (INIS)

    Spicer, B.M.

    1981-01-01

    Major centres of experimental nuclear physics are at Melbourne University, A.N.U., the A.A.E.C., James Cook University and the University of Western Australia. Groups working in theoretical nuclear physics exist at Melbourne, A.N.U., the A.A.E.C., Flinders and Adelaide Universities and the University of Western Australia. The activities of these groups are summarised

  3. Nuclear energy

    International Nuclear Information System (INIS)

    1996-01-01

    Several issues concerning nuclear energy in France during 1996 are presented: permission of a demand for installing underground laboratories in three sites (Marcoule, Bure and Chapelle-Baton); a report assessing the capacity of Superphenix plant to operate as a research tool; the project of merging between Framatome and Gec-Alsthom companies; the revision of a general report on nuclear energy in France; the issue of military plutonium management

  4. Nuclear Data

    Energy Technology Data Exchange (ETDEWEB)

    White, Morgan C. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-01-23

    PowerPoint presentation targeted for educational use. Nuclear data comes from a variety of sources and in many flavors. Understanding where the data you use comes from and what flavor it is can be essential to understand and interpret your results. This talk will discuss the nuclear data pipeline with particular emphasis on providing links to additional resources that can be used to explore the issues you will encounter.

  5. Nuclear medicine

    International Nuclear Information System (INIS)

    Blanquet, Paul; Blanc, Daniel.

    1976-01-01

    The applications of radioisotopes in medical diagnostics are briefly reviewed. Each organ system is considered and the Nuclear medicine procedures pertinent to that system are discussed. This includes, the principle of the test, the detector and the radiopharmaceutical used, the procedure followed and the clinical results obtained. The various types of radiation detectors presently employed in Nuclear Medicine are surveyed, including scanners, gamma cameras, positron cameras and procedures for obtaining tomographic presentation of radionuclide distributions [fr

  6. Nuclear medicine

    International Nuclear Information System (INIS)

    Chamberlain, M.J.

    1986-01-01

    Despite an aggressive, competitive diagnostic radiology department, the University Hospital, London, Ontario has seen a decline of 11% total (in vivo and in the laboratory) in the nuclear medicine workload between 1982 and 1985. The decline of in vivo work alone was 24%. This trend has already been noted in the U.S.. Nuclear medicine is no longer 'a large volume prosperous specialty of wide diagnostic application'

  7. Nuclear cardiac

    International Nuclear Information System (INIS)

    Slutsky, R.; Ashburn, W.L.

    1982-01-01

    The relationship between nuclear medicine and cardiology has continued to produce a surfeit of interesting, illuminating, and important reports involving the analysis of cardiac function, perfusion, and metabolism. To simplify the presentation, this review is broken down into three major subheadings: analysis of myocardial perfusion; imaging of the recent myocardial infarction; and the evaluation of myocardial function. There appears to be an increasingly important relationship between cardiology, particularly cardiac physiology, and nuclear imaging techniques

  8. Nuclear medicine

    Energy Technology Data Exchange (ETDEWEB)

    Sharma, S M [Bhabha Atomic Research Centre, Bombay (India). Radiation Medicine Centre

    1967-01-01

    The article deals with the growth of nuclear medicine in India. Radiopharmaceuticals both in elemental form and radiolabelled compounds became commercially available in India in 1961. Objectives and educational efforts of the Radiation Medicine Centre setup in Bombay are mentioned. In vivo tests of nuclear medicine such as imaging procedures, dynamic studies, dilution studies, thyroid function studies, renal function studies, linear function studies, blood flow, and absorption studies are reported. Techniques of radioimmunoassay are also mentioned.

  9. Nuclear technology

    International Nuclear Information System (INIS)

    1983-03-01

    This report examines nuclear technology in Canada, with emphasis on Quebec, as a means of revitilizing industry. The historical, present day, and future states of Atomic Energy of Canada Limited are examined. Future research programs are discussed in greatest detail. These range from disposal of porcine wastes to new applications for electricity to nuclear medical techniques (to cite only a few examples). The executive summary is written in English. (23 fig., 16 tab.)

  10. Nuclear risk

    International Nuclear Information System (INIS)

    Mulkers, G.

    1988-01-01

    This file includes data on risks insured by the nuclear insurance pool in Belgium and on the Chernobyl accident covering injury, economic damage and compensation for the latter. Also included are the texts of the IAEA Conventions on Early Notification and on Assistance in Case of a Nuclear Accident as well as that of a Convention on long-distance transfrontier atmospheric pollution signed in Geneva [fr

  11. Nuclear accidents

    International Nuclear Information System (INIS)

    1987-01-01

    On 27 May 1986 the Norwegian government appointed an inter-ministerial committee of senior officials to prepare a report on experiences in connection with the Chernobyl accident. The present second part of the committee's report describes proposals for measures to prevent and deal with similar accidents in the future. The committee's evaluations and proposals are grouped into four main sections: Safety and risk at nuclear power plants; the Norwegian contingency organization for dealing with nuclear accidents; compensation issues; and international cooperation

  12. Nuclear education

    International Nuclear Information System (INIS)

    Kemeny, L.G.

    1987-01-01

    All scientists and technologists are agreed that the coal based fuel cycle is somewhere between 50 to 300 times more dangerous than the uranium fuel cycle. Under these circumstances it is not difficult to show that on a more quantitative basis, the nuclear industry, in all countries, has an unblemished safety record when compared with other energy sources. Various hazards and benefits of nuclear power are analyzed in this paper comparing with other energy sources. (Liu)

  13. Nuclear astrophysics

    International Nuclear Information System (INIS)

    Arnould, M.; Takahashi, K.

    1999-01-01

    Nuclear astrophysics is that branch of astrophysics which helps understanding of the Universe, or at least some of its many faces, through the knowledge of the microcosm of the atomic nucleus. It attempts to find as many nuclear physics imprints as possible in the macrocosm, and to decipher what those messages are telling us about the varied constituent objects in the Universe at present and in the past. In the last decades much advance has been made in nuclear astrophysics thanks to the sometimes spectacular progress made in the modelling of the structure and evolution of the stars, in the quality and diversity of the astronomical observations, as well as in the experimental and theoretical understanding of the atomic nucleus and of its spontaneous or induced transformations. Developments in other subfields of physics and chemistry have also contributed to that advance. Notwithstanding the accomplishment, many long-standing problems remain to be solved, and the theoretical understanding of a large variety of observational facts needs to be put on safer grounds. In addition, new questions are continuously emerging, and new facts endangering old ideas. This review shows that astrophysics has been, and still is, highly demanding to nuclear physics in both its experimental and theoretical components. On top of the fact that large varieties of nuclei have to be dealt with, these nuclei are immersed in highly unusual environments which may have a significant impact on their static properties, the diversity of their transmutation modes, and on the probabilities of these modes. In order to have a chance of solving some of the problems nuclear astrophysics is facing, the astrophysicists and nuclear physicists are obviously bound to put their competence in common, and have sometimes to benefit from the help of other fields of physics, like particle physics, plasma physics or solid-state physics. Given the highly varied and complex aspects, we pick here some specific nuclear

  14. Utilizando a Maquinaria Celular

    Directory of Open Access Journals (Sweden)

    Fernanda Serpa Cardoso

    2006-07-01

    Full Text Available The cell machinery, especially its molecular biology, is a subject of difficult comprehension and visualization due to its broadness and complexity. In face of this difficulty, the development of new teaching approaches that go beyond the traditional  lectures  and  textbooks  is  needed  to  deal  with  this  issue.  Educational  games  are  an  alternative  for  the teaching and learning processes, working as a tool that makes the comprehension of the subject contents easier and more enjoyable, at the same time it stimulates student's thinking, competition and cooperative work. To facilitate the teaching of Molecular Biology, a game called "Using the Molecular Biology" has been proposed. For its development, a data bank with 48 questions and answers was created based on College textbooks and web sites dealing with this issue.  The  game  uses  the  lymphocyte  B  as  a  cell  model  to  approach  the  processes  of  DNA  replication  and transcription,  and  RNA  translation,  which  are  involved in  the  synthesis  of antibodies. The  game  has  been  originally conceived as a complement for laboratory classes in the undergraduate medical courses at the Universidade Federal Fluminense.  However,  to  broaden  the  use  of  "Using  the  Molecular  Biology"  to  the  High  School,  a  survey  form  was elaborated  and  handed  out  to  nine  teachers  from  private  and  public  schools.  This  form  allowed  us  to  classify  the game  questions  into  three  difficulty  levels  for  teachers  and  students,  according  with  teacher's  opinion:  easy, intermediate, and difficult. This material has been offered to the schools registered in the "The future in the schools" Project, where  it was tested  and used  as  an educational  tool  complementary to the traditional  Biology  classes. The student's receptivity to and the efficacy of this support material have been evaluated.

  15. Nuclear safety

    International Nuclear Information System (INIS)

    2014-01-01

    The Program on Nuclear Safety comprehends Radioprotection, Radioactive Waste Management and Nuclear Material Control. These activities are developed at the Nuclear Safety Directory. The Radioactive Waste Management Department (GRR) was formally created in 1983, to promote research and development, teaching and service activities in the field of radioactive waste. Its mission is to develop and employ technologies to manage safely the radioactive wastes generated at IPEN and at its customer’s facilities all over the country, in order to protect the health and the environment of today's and future generations. The Radioprotection Service (GRP) aims primarily to establish requirements for the protection of people, as workers, contractors, students, members of the general public and the environment from harmful effects of ionizing radiation. Furthermore, it also aims to establish the primary criteria for the safety of radiation sources at IPEN and planning and preparing for response to nuclear and radiological emergencies. The procedures about the management and the control of exposures to ionizing radiation are in compliance with national standards and international recommendations. Research related to the main activities is also performed. The Nuclear Material Control has been performed by the Safeguard Service team, which manages the accountability and the control of nuclear material at IPEN facilities and provides information related to these activities to ABACC and IAEA. (author)

  16. Nuclear fuel

    Energy Technology Data Exchange (ETDEWEB)

    Nakano, H [Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)

    1976-10-01

    It is expected that nuclear power generation will reach 49 million kW in 1985 and 129 million kW in 1995, and the nuclear fuel having to be supplied and processed will increase in proportion to these values. The technical problems concerning nuclear fuel are presented on the basis of the balance between the benefit for human beings and the burden on the human beings. Recently, especially the downstream of nuclear fuel attracts public attention. Enriched uranium as the raw material for light water reactor fuel is almost monopolized by the U.S., and the technical information has not been published for fear of the diversion to nuclear weapons. In this paper, the present situations of uranium enrichment, fuel fabrication, transportation, reprocessing and waste disposal and the future problems are described according to the path of nuclear fuel cycle. The demand and supply of enriched uranium in Japan will be balanced up to about 1988, but afterwards, the supply must rely upon the early establishment of the domestic technology by centrifugal separation method. No problem remains in the fabrication of light water reactor fuel, but for the fabrication of mixed oxide fuel, the mechanization of the production facility and labor saving are necessary. The solution of the capital risk for the construction of the second reprocessing plant is the main problem. Japan must develop waste disposal techniques with all-out efforts.

  17. Nuclear safety

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2014-07-01

    The Program on Nuclear Safety comprehends Radioprotection, Radioactive Waste Management and Nuclear Material Control. These activities are developed at the Nuclear Safety Directory. The Radioactive Waste Management Department (GRR) was formally created in 1983, to promote research and development, teaching and service activities in the field of radioactive waste. Its mission is to develop and employ technologies to manage safely the radioactive wastes generated at IPEN and at its customer’s facilities all over the country, in order to protect the health and the environment of today's and future generations. The Radioprotection Service (GRP) aims primarily to establish requirements for the protection of people, as workers, contractors, students, members of the general public and the environment from harmful effects of ionizing radiation. Furthermore, it also aims to establish the primary criteria for the safety of radiation sources at IPEN and planning and preparing for response to nuclear and radiological emergencies. The procedures about the management and the control of exposures to ionizing radiation are in compliance with national standards and international recommendations. Research related to the main activities is also performed. The Nuclear Material Control has been performed by the Safeguard Service team, which manages the accountability and the control of nuclear material at IPEN facilities and provides information related to these activities to ABACC and IAEA. (author)

  18. Nuclear energy

    International Nuclear Information System (INIS)

    Seidel, J.

    1990-01-01

    This set of questions is based on an inquiry from the years 1987 to 1989. About 250 people af all age groups - primarily, however, young people between 16 and 25 years of age - were asked to state the questions they considered particularly important on the subject of nuclear energy. The survey was carried out without handicaps according to the brain-storming principle. Although the results cannot claim to be representative, they certainly reflect the areas of interest of many citizens and also their expectations, hopes and fears in connection with nuclear energy. The greater part of the questions were aimed at three topic areas: The security of nuclear power-stations, the effects of radioactivity on people and the problem of waste disposal. The book centres around these sets of questions. The introduction gives a general survey of the significance of nuclear energy as a whole. After this follow questions to do with the function of nuclear power stations, for the problems of security and waste disposal - which are dealt with in the following chapters - are easier to explain and to understand if a few physical and technical basics are understood. In the final section of the book there are questions on the so-called rejection debate and on the possibility of replacing nuclear energy with other energy forms. (orig./HP) [de

  19. Nuclear technologies

    International Nuclear Information System (INIS)

    Toyama, Makoto; Hamasaki, Manabu; Kobayashi, Masahiko; Hoshide, Akihiko; Katayama, Kimio; Nozawa, H.; Karigome, Satoshi

    2010-01-01

    In recent days, energy security is becoming a major global concern and it has been recognized that a major reduction in greenhouse-gas emissions is required to combat climate change. Considerable expansion and new introduction of nuclear power generation are currently being planned and considered for the further in various parts of the world. Nuclear technologies of the latest 10 years in Japan were reviewed with their characteristics, advancement and future perspective. Steady efforts have been made to construct new nuclear power stations with computer-aided engineering system and modular and prefabricated structures, extend the interval of periodic inspections under the new inspection system that should improve both safety and reliability, implement advanced measures against aging and develop the next-generation light water reactors including a medium small reactor. Export of nuclear power plants has been promoted with international business alliance or cooperation. Activities to close nuclear fuel cycle to ensure sustainable nuclear energy utilization have been promoted. Decommissioning technologies for Tokai power station have been developed and accumulated know-how will be utilized in light water reactors. (T. Tanaka)

  20. Nuclear watershed

    International Nuclear Information System (INIS)

    Makovich, L.; Parish, T.

    1984-01-01

    In 1979 the accident at Three Mile Island brought nuclear power to the forefront of national attention. Over the last five years there have been no new orders for nuclear plants, construction costs and lead times have increased drastically, and numerous plants have been cancelled. In the coming years many new plants will come on line, and the first round of nuclear plant retirements will begin. Thus, the new set of issues faced by utilities are whether to complete plants currently under construction, how to recover the cost of abandoned plants, how to handle the potential rate shock of bringing costly plants into rate base, and how to accomplish decommissioning and retirement of nuclear plants. This paper presents and analyzes these issues. First, the history of the nuclear electric generation industry is reviewed. Next a case study illustrating the cost momentum built into nuclear power plant construction is presented. The issues involved in plant cancellation are discussed. Finally, a case study involving rate phase-in strategies is analyzed. 1 reference, 7 figures

  1. Estudio molecular preliminar de accesiones de maíz (Zea maysL. criollo e indígena Colombiano, utilizando una región de ADN cloroplástico

    Directory of Open Access Journals (Sweden)

    Ediel Armando Revelo Portilla

    2015-01-01

    Full Text Available Se exploró en forma preliminar la diversidad genética existente en las 23 razas de maíz criollo e indígena descritas para Colombia por Roberts y colaboradores (1957, para el efecto se evaluaron 28 cebadores nucleares y cloroplásticos. Catorce de ellos amplificaron en la reacción en cadena de la polimerasa (PCR y fueron enviados para secuenciar a Macrogen Inc. (Corea. Mediante programas bioinformáticos (BioEdit 7.1.0, ClustalW versión 1.81, EditPlus Text Editor versión 3.20 y Gblock 0.91b 8 se encontró que ocho de estos cebadores presentaron un nivel alto de polimorfismo. La región genómica cloroplástica AtpB-1-RbcL-1 mostró el mayor polimorfismo y por tanto se utilizó para evaluar 23 materiales representativos de las 23 razas conservadas en el Banco de Germoplasma del CIMMYT (Centro Internacional de Mejoramiento de Maíz y Trigo en México. Con el análisis de secuencias se revalidaron y confrontaron los grupos raciales obtenidos en el presente estudio -tres razas primitivas, siete razas probablemente introducidas, y 13 razas híbridas colombianas- con aquellos establecidos por Roberts y colaboradores, en los cuales se encontraron dos razas primitivas, nueve probablemente introducidas y 12 híbridas colombianas y con los grupos establecidos por Cardona (2010 utilizando la metodología Ward-MLM para los mismos caracteres descritos por Roberts et al. (1957, donde se encontraron cinco razas primitivas, siete probablemente introducidas y nueve híbridas colombianas. Con base en lo anterior, en el presente trabajo se hizo un aporte metodológico para revalidar datos históricos y redefinir grupos raciales.

  2. PROPAGACIÓN DE Tabebuia Donnell-Smithii Rose (GUAYACÁN BLANCO UTILIZANDO HORMONAS DE ENRAIZAMIENTO

    Directory of Open Access Journals (Sweden)

    Mercedes Susana Carranza Patiño

    2013-02-01

    Full Text Available Resumen La amplia distribución y abundancia natural de Tabebuia donnell-smithii (guayacán blanco se ha visto reducida por la tala excesiva de los árboles, lo que ha ocasionado la desaparición de genotipos valiosos así como disminución de las poblaciones naturales, existiendo además carencia de alternativas de producción de plantas a gran escala. Se hace por tanto necesario orientar la investigación a establecer una técnica para la propagación vegetativa de guayacán blanco utilizando fitorreguladores. La metodología se basó en el uso de las hormonas de enraizamiento ácido naftalenacético (ANA y ácido indolbutírico (AIB, en concentraciones de 0, 1,500 y 2,000 mg kg-1 en sustratos turba y arena. Las yemas apicales fueron colocadas en una cámara húmeda en condiciones de invernadero. Se aplicó un Diseño Completamente al Azar (DCA en un arreglo factorial 2 sustratos x 3 dosis de hormona ANA x 3 dosis de hormona AIB, con cuatro repeticiones y cuatro unidades de observación. A los 45 días se evaluó el porcentaje de sobrevivencia y el enraizamiento, el número de raíces, la longitud de la raíz mayor, el número de brotes, la longitud de brotes, y el vigor. Los resultados no mostraron diferencias significativas entre los distintos tratamientos para todas las variables, sin embargo para el efecto simple e interacciones se observó diferencias para las variables evaluadas, siendo el mejor sustrato turba y las concentraciones óptimas de auxinas de 0 a 1,500 mg Kg-1. Se concluye que el guayacán blanco es una especie de fácil enraizamiento, ya que con y sin la aplicación de hormonas enraizadoras en el sustrato turba y arena se logró la obtención de clones, disminuyendo el tiempo de obtención de nuevas plantas.

  3. Detecção de Brucella abortus em tecidos bovinos utilizando ensaios de PCR e qPCR¹

    Directory of Open Access Journals (Sweden)

    Marrielen A.B. Caitano

    2014-06-01

    Full Text Available Objetivou-se no presente estudo avaliar as técnicas reação em cadeia da polimerase (PCR e PCR em Tempo Real (qPCR para detectar Brucella abortus, a partir de tecidos bovinos com lesões sugestivas de brucelose. Para isto, 21 fragmentos de tecidos bovinos coletados em abatedouros de Mato Grosso do Sul foram processados e submetidos ao cultivo microbiológico e extração do DNA genômico para realização das reações de PCR e qPCR. No cultivo microbiológico, oito amostras apresentaram crescimento bacteriano e cinco foram confirmadas como B. abortus por PCR. Diretamente das amostras de tecido, DNA do gênero Brucella (oligonucleotídeos IS711 foi detectado em 13 (61,9% amostras de tecido e 17 (81% amostras de homogeneizado. Já com os oligonucleotídeos espécie-específicos BruAb2_0168F e BruAb2_0168R, 14 (66% amostras de tecido e 18 (85,7% amostras de homogeneizado foram amplificadas. Seis amostras positivas na PCR espécie-específica foram sequenciadas e o best hit na análise BLASTn foi B. abortus. Na qPCR, 21 (100% amostras de tecidos e 19 (90,5% amostras de homogeneizado foram positivas para B. abortus. Dez amostras de DNA de sangue bovino de rebanho certificado livre foram utilizadas como controle negativo nas análises de PCR e qPCR utilizando-se os oligonucleotídeos BruAb2_0168F e BruAb2_0168R. Na PCR nenhuma amostra amplificou, enquanto que na qPCR 2 (20% amplificaram. Conclui-se que as duas técnicas detectam a presença de B. abortus diretamente de tecidos e homogeneizados, porém a qPCR apresentou maior sensibilidade. Os resultados obtidos indicam que a qPCR pode representar uma alternativa rápida e precisa para a detecção de B. abortus diretamente de tecidos, e ser utilizada em programas de vigilância sanitária, por apresentar sensibilidade e especificidade satisfatórias.

  4. Interfaz Gráfica Computacional para Destilación Multicomponente utilizando Métodos Cortos

    Directory of Open Access Journals (Sweden)

    A. Osorio Mirón

    2011-12-01

    Full Text Available En este trabajo, se elaboró una interfaz gráfica que determina por medio de simulación en estado estacionario el número de platos necesarios en el proceso de destilación multicomponente, así como la composición en el flujo de destilado y fondos de una torre de destilación utilizando métodos cortos. La interfaz gráfica de usuario, se construyó en el lenguaje de programación Python 2.5, permite presentar los datos de entrada y salida para el caso de columnas de destilación operando en régimen permanente. Los resultados del uso de la interfaz gráfica muestran una forma simple de realizar diseños preliminares de torres de destilación y su potencialidad como material de apoyo para el estudio y comprensión de conceptos básicos en destilación multicomponente. En un trabajo posterior se podrá visualizar el desempeño del modelo dinámico a través de perturbaciones programadas en las condiciones de operación.   Palabras claves: destilación multicomponente; métodos cortos; interfaz gráfica de usuario; Phyton 2.5.In this work, we developed a graphical interface that determines by steady-state simulation the number of plates required for multicomponent distillation process and the composition of distillate and bottoms flow of a distillation tower using short-cut methods. The graphical user interface was built in the programming language Python 2.5, allows to present the input and output data for the case of distillation columns operating in steady state. The results of using the graphical interface shows a simple way to make preliminary designs of distillation towers and its potential as support material for the study and understanding of basic concepts in multicomponent distillation. In a later work it will can display the dynamic model performance through scheduled disturbances in operating conditions.   Keywords: multicomponent distillation; shorcut methods;graphical user interface; Phyton 2.5.

  5. Evaluación del cultivo de la dorada ( Brycon moorei sinuensis en jaulas flotantes utilizando cuatro alimentos concentrados.

    Directory of Open Access Journals (Sweden)

    Robinsón Rosado

    2003-12-01

    Full Text Available El presente estudio se inició el 30 de septiembre del2000 con el cultivo de Dorada (Brycon mooreisinuensis en jaulas flotantes en el reservorio de laGranja Piscícola Tamarindo (El Espinal, Colombia,utilizando cuatro alimentos concentrados durante 180días. Se determinó el crecimiento mediante laganancia en longitud, ganancia en peso, tasa decrecimiento específico, sobre-vivencia final, biomasatotal, factor de condición, factor de conversiónalimenticia. Se sembraron 816 juveniles con longitudpromedio de 17.8 cm y peso promedio de 78.9 g,divididos en cuatro tratamientos con densidad desiembra de 25 peces/cm3 y tres réplicas cada uno.Las dietas balanceadas (proteína bruta y la cantidadde energía (Kcal/Kg suministrada fueron: Tratamiento1: 20% y 2637; tratamiento 2: 32% y 3127;tratamiento 3: 28% y 2852; y tratamiento 4: 24% y2751, respectivamente. El diseño experimental fuecompletamente aleatorio y se aplicó la técnica deanálisis de varianza a los datos biométricos yparámetros físico-químicos. Como prueba designificancia se usó la prueba de Tukey-Kramer con95% de confiabilidad. El modelo matemático de VIONBERTALANFY y la transformación de FOR-WALFORDfueron válidos para el ajuste de las curvas decrecimiento en longitud, peso y la relación longitud– peso. Se puede afirmar que la Dorada consumiólas dietas de origen vegetal de igual manera que lasde origen animal, sin embargo la dieta del 28% deproteína bruta (tratamiento 3 muestra los mejoresresultados, sin diferencias significativas entretratamientos (p > 0.05. De acuerdo con la literaturacitada no hay investigaciones que muestren losrequerimientos nutricionales óptimos para laalimentación de esta especie. En todos los trabajosanteriores, la ganancia de peso diaria fue baja, peromejores que las obtenidas en esta investigación.Mientras que el rendimiento en biomasa fue mayorque los reportados para cultivo en tierra, para todoslos tratamientos en este estudio fue muy bajo.

  6. Obtención de silicatos de calcio utilizando el método de precipitación controlada

    Directory of Open Access Journals (Sweden)

    Rodríguez-Páez, J. E.

    2005-12-01

    obtenido, al ser sometido a tratamientos térmicos, utilizando para ello Difracción de Rayos X (DRX y espectroscopía infrarroja (FTIR.

  7. Recuperación de oro a partir de disoluciones de amoniaco y tiosulfato utilizando carbón activado

    Directory of Open Access Journals (Sweden)

    Vargas, C.

    2006-06-01

    Full Text Available The recovery of gold from solutions containing thiosulfate and ammonia using granular activated carbon was studied, evaluating the adsorption and elution stages. The influence of ammonia and thiosulfate concentration and the presence of impurities such as copper and zinc were also evaluated. In the presence of ammonia there was a concentration which maximized the adsorption of gold, while thiosulfate and impurities presence was harmful for the adsorption of gold. During elution, ammonia and thiosulfate concentration, pH regulator and temperature were evaluated. Ammonia favored the process as long as thiosulfate showed a maximum starting from which the elution diminishes. The effect of the pH regulator was very important; If was revealed that when the pH was regulated with caustic ammonia, a synergic effect appeared which favored the elution. Temperature favored the elution process, with activation energy of 9.13 kJ/mol.

    Se estudió la recuperación de oro de disoluciones de tiosulfato y amoniaco, utilizando carbón activado en gránulos, evaluando las etapas de adsorción y desorción. En la etapa de adsorción se evaluaron la concentración de amoniaco, de tiosulfato y de impurezas como cobre y cinc. En las condiciones experimentales ensayadas se encontró que, en presencia de amoniaco, existe una concentración óptima que maximiza la adsorción de oro, mientras que la presencia de tiosulfato e impurezas, tales como cobre y cinc, es perjudicial para la adsorción de oro. Para la desorción se evaluó la concentración de amoniaco, de tiosulfato, el regulador de pH y la temperatura. El amoniaco favoreció el proceso, en tanto que el tiosulfato presentó un máximo a partir del cual la desorción disminuyó. El efecto del regulador de pH fue muy importante, determinándose que cuando el pH era controlado con hidróxido de amonio, se presentaba un efecto sinérgico que favorecía la desorción. La temperatura favoreció el proceso de

  8. Evaluación de Aprendizajes Mediante Rúbricas Utilizando Rubricarte / Evaluation of Learning by Rubrics Using Rubricarte

    Directory of Open Access Journals (Sweden)

    Vanessa Miguel

    2015-12-01

    Full Text Available Los diseños curriculares por competencias buscan promover el desarrollo de capacidades amplias e integrales que le permitan a las personas un desempeño adecuado en situaciones cambiantes, lo cual requiere de nuevas estrategias en la docencia universitaria donde se aprovechen las potencialidades de las Tecnologías de la Información y la Comunicación (TIC. En este contexto, las matrices de valoración o rúbricas han surgido como un instrumento útil para la evaluación de competencias, ya que a través de un conjunto de criterios permiten valorar el aprendizaje enfocándose en el desempeño del alumno en un contexto determinado. En este trabajo se analiza una experiencia educativa del uso para la evaluación de aprendizajes de RubricArte, una herramienta de software colaborativa desarrollada en la UCV que facilita el desarrollo, uso y divulgación de rúbricas en línea. La experiencia se desarrolló durante el período académico 2015-I (marzo –julio 2015 en la asignatura Modalidades Educativas y Tecnología de la Maestría en Educación, mención TIC de la Facultad de Humanidades y Educación (FHE de la UCV. El curso se dictó bajo la modalidad mixta con actividades presenciales y actividades en un entorno virtual de aprendizaje a través del Campus Virtual de la UCV. RubricArte permitió tanto la evaluación colaborativa como la autoevaluación y la heteroevaluación utilizando rúbricas en línea de una manera sencilla donde se compartieron los criterios de evaluación y donde esta actividad se convirtió en parte del proceso de aprendizaje promoviendo la reflexión acerca del mismo.

  9. CALIDAD EDUCATIVA EN UN CENTRO DE EDUCACIÓN PARVULARIA UTILIZANDO EL CATÁLOGO DE CRITERIOS DE CALIDAD

    Directory of Open Access Journals (Sweden)

    María Eugenia Soto Muñoz

    2016-01-01

    Full Text Available La calidad de la educación que se imparte en Chile y en otros países de América Latina representa una situación preocupante, ya que se ha demostrado que los procesos educativos de calidad, sobre todo en la primera infancia, impactan positivamente en el futuro desarrollo escolar de la niñez, relevando la importancia del nivel pre-escolar para superar las desventajas iniciales de los niños provenientes de sectores vulnerables. El artículo reporta un estudio no experimental de tipo mixto, basado en la Investigación Acción Colaborativa en un Jardín Infantil específico de la provincia de Concepción, Chile. La intervención se llevó cabo siguiendo los pasos propuestos por el Catálogo de Criterios de Calidad. Además, para constatar incremento de la calidad, se realizó una evaluación inicial y otra posterior a la intervención utilizando los instrumentos internacionales estandarizados ITERS-R y ECERS-R; también, se utiliza el test chileno TEVI-R para medir el vocabulario pasivo de los niños. A su vez, se utilizó Focus Group para recoger la opinión y percepciones del equipo técnico pedagógico del Jardín, respecto a la intervención realizada. En coherencia con el propósito del estudio, se pudo establecer que hubo avances en el desarrollo de la calidad educativa del jardín, pero no es posible asegurar que ella se mantenga a largo plazo, pues ello implica una internalización de procesos de reflexión y autocrítica en el equipo técnico pedagógico, lo que requiere mayor tiempo. Con esta experiencia se espera aportar evidencia para mejorar procesos educativos en Educación Parvularia.

  10. Nuclear waste

    International Nuclear Information System (INIS)

    Anon.

    1983-01-01

    The Koeberg nuclear power station, planned to come on stream in 1984, is expected to save South Africa some six million t/annum of coal, and to contribute some 10 per cent of the country's electricity requirements. The use of nuclear energy will provide for growing national energy needs, and reduce high coal transport costs for power generation at the coast. In the long term, however, it gives rise to the controversial question of nuclear waste storage. The Atomic Energy Corporation of South Africa Ltd (AEC) recently announced the purchase of a site in Namaqualand (NW Cape) for the storage of low-level radioactive waste. The Nuclear Development Corporation of South Africa (Pty) Ltd, (NUCOR) will develop and operate the site. The South African Mining and Engineering Journal interviewed Dr P.D. Toens, manager of the Geology Department and Mr P.E. Moore, project engineer, on the subject of nuclear waste, the reasons behind Nucor's choice of site and the storage method

  11. Nuclear risk

    International Nuclear Information System (INIS)

    Levenson, M.

    1989-01-01

    The title of our session, Nuclear Risk Versus Other Power Options, is provocative. It is also a title with different meanings to different people. To the utility chief executive officer, nuclear power is a high-risk financial undertaking because of political and economic barriers to cost recovery. To the utility dispatcher, it is a high-risk future power source since plant completion and start-up dates can be delayed for very long times due to uncertain legal and political issues. To the environmentalist, concerned about global effects such as greenhouse and acid rain, nuclear power is a relatively low risk energy source. To the financial people, nuclear power is a cash cow turned sour because of uncertainties as to what new plants will cost and whether they will even be allowed to operate. The statistics on risk are known and the results of probability risk assessment calculations of risks are known. The challenge is not to make nuclear power safer, it is already one of the safest, if not the safest, source of power currently available. The challenge is to find a way to communicate this to the public

  12. Nuclear recession

    International Nuclear Information System (INIS)

    Speth, G.

    1978-01-01

    The private sector's growing doubts about nuclear power plants, as reflected in the decline in new orders and the number of rescinded orders, will result in an estimated total of under 300 nuclear power plants by the year 2000 rather than the 1200 to 1500 that were projected several years ago. The decline is a result of construction and equipment costs and a lower operating efficiency than anticipated. The growth of electricity demand also declined after 1974 and, although it is increasing again, there are concerns about future growth rates. Besides its noncompetitive position relative to coal, nuclear plant construction suffers from restrictive policies based on the uncertainties of safety, security, waste disposal, and proliferation. Unless these problems can be resolved, many consider nuclear power to be an impractical option as an energy source. The Council on Environmental Quality supports policies that will permit further nuclear or coal development only after a clear demonstration of technical and institutional capacity to handle these problems. A commitment to solar technology is urged

  13. Nuclear fusion

    International Nuclear Information System (INIS)

    Al-zaelic, M.M.

    2013-01-01

    Nuclear fusion can be relied on to solve the global energy crisis if the process of limiting the heat produced by the fusion reaction (Plasma) is successful. Currently scientists are progressively working on this aspect whereas there are two methods to limit the heat produced by fusion reaction, the two methods are auto-restriction using laser beam and magnetic restriction through the use of magnetic fields and research is carried out to improve these two methods. It is expected that at the end of this century the nuclear fusion energy will play a vital role in overcoming the global energy crisis and for these reasons, acquiring energy through the use of nuclear fusion reactors is one of the most urge nt demands of all mankind at this time. The conclusion given is that the source of fuel for energy production is readily available and inexpensive ( hydrogen atoms) and whole process is free of risks and hazards, especially to general health and the environment . Nuclear fusion importance lies in the fact that energy produced by the process is estimated to be about four to five times the energy produced by nuclear fission. (author)

  14. Optimización de la succión de sólidos sumergidos utilizando bombas centrífugas con velocidad variable

    OpenAIRE

    Moreno Ávalos, Víctor Manuel

    2012-01-01

    La acumulación de material sólido en embalses, cauces fluviales y en zonas marítimas hace que la extracción mecánica de estos materiales por medio de succión sea cada vez mas frecuente, por ello resulta importante estudiar el rendimiento de la succión de estos materiales analizando la forma de las boquillas y los parámetros del flujo incluyendo la bomba. Esta tesis estudia, mediante equipos experimentales, la eficacia de distintos dispositivos de extracción de sólidos (utilizando boquillas...

  15. Análise numérica de provas de carga em sapatas utilizando o método dos elementos finitos

    OpenAIRE

    Burnier, Andréia Aparecida Lopes

    2006-01-01

    Nesse trabalho apresentam-se as análises numéricas de duas provas de carga instrumentadas realizadas em fundações superficiais rígidas (sapatas) por GOUVÊA (2000) e DUARTE (2006). As análises foram realizadas com o método dos elementos finitos, utilizando os programas SIGMA/W da Geo-Slope International Ltd. e ANLOG (Análise Não-Linear de Obras Geotécnicas) desenvolvido por NOGUEIRA (1998). Na modelagem do comportamento tensão-deformação do solo foram utilizados os modelos constitutivos linear...

  16. Análisis de estabilidad del reactor PFTR para una reacción con cinética de primer orden utilizando la funcional de Lyapunov

    OpenAIRE

    Héctor Armando Durán Peralta; Luis Fernando Córdoba C

    2007-01-01

    Abunda la literatura referente al análisis de estabilidad de reactores con parámetros globalizados de concentración y temperatura (por ejemplo el CSTR), en cambio es escasa la literatura sobre la estabilidad de reactores con parámetros distribuidos donde existe distribución espacial de concentración y temperatura, como es el caso del reactor tubular PFTR. Este documento analiza la estabilidad del reactor PFTR isotérmico y no isotérmico para una reacción con cinética de primer orden utilizando...

  17. Predicción de la epidemia del virus sincitial respiratorio en Bogotá, D.C., utilizando variables climatológicas

    Directory of Open Access Journals (Sweden)

    Gilberto González-Parra

    2016-09-01

    Full Text Available Introducción. El virus sincitial respiratorio es uno de los principales causantes de mortalidad de niños y adultos mayores en el mundo. Objetivo. Predecir las semanas de inicio de los brotes de infección por el virus sincitial respiratorio en Bogotá entre 2005 y 2010, utilizando variables climatológicas como variables de predicción. Materiales y métodos. Se establecieron las fechas de inicio de los brotes en niños menores de cinco años ocurridas entre 2005 y 2010, en Bogotá D.C., Colombia. Se seleccionaron las variables climatológicas utilizando una matriz de correlación y, posteriormente, se construyeron 1.020 modelos resultado de la combinación de las distintas variables climatológicas y las semanas de antelación al inicio del brote. Se seleccionaron los modelos utilizando los datos correspondientes a periodos de seis (2005-2010, cuatro (2005-2008 y dos años (2009-2010. Se determinaron los mejores modelos y las variables climatológicas más relevantes, utilizando clasificadores bayesanos ingenuos y curvas características de operación del receptor (Receiver Operating Characteristic, ROC. Resultados. Los mejores resultados se obtuvieron con los modelos que utilizaron el periodo de dos años (2009-2010 y la semana 0, con 52 y 60 % de aciertos, respectivamente. La humedad mínima fue la variable que más apareció en los mejores modelos (62 %. Los clasificadores bayesanos ingenuos permitieron establecer cuáles eran los mejores modelos para predecir la semana de inicio del brote. Conclusiones. Los resultados sugieren que los modelos en que se utilizaron la humedad mínima, la velocidad del viento y la temperatura mínima serían los modelos de predicción más eficaces.

  18. Sorologia da hanseníase utilizando PGL-I: revisão sistemática Leprosy serology using PGL-I: a systematic review

    OpenAIRE

    Rodrigo Scaliante de Moura; Karla Lucena Calado; Maria Leide W. Oliveira; Samira Bührer-Sékula

    2008-01-01

    A sorologia utilizando o antígeno espécie-específico do Mycobacterium leprae, PGL-I, pode ser um marcador de carga bacteriana em pacientes com hanseníase. Estudos identificaram potencial de uso da sorologia na classificação de pacientes para fins de tratamento, monitoramento de terapia, risco de recidiva e na seleção dos contatos com maior risco de adoecer. Foi realizada uma revisão sistemática e 26 artigos foram incluídos na análise comparativa. Avaliamos os resultados do uso da sorologia PG...

  19. Precisão do posicionamento maxilar em cirurgias bimaxilares utilizando sequência cirúrgica convencional e sequência invertida

    OpenAIRE

    Fabio Gambôa Ritto

    2012-01-01

    Resumo: O objetivo deste trabalho foi avaliar a precisão do posicionamento maxilar em cirurgias ortognáticas bimaxilares utilizando sequência cirúrgica convencional e sequência invertida, isto é, quando a mandíbula foi osteotomizada e fixada antes da maxila. Neste estudo retrospectivo, 80 telerradiografias obtidas em norma lateral de pacientes submeditos à cirurgia ortognática foram analisadas, sendo 40 obtidas no período pré-operatório e 40 no pós-operatório. A amostra foi dividida em 2 grup...

  20. Estudio de comparación del tratamiento de aguas residuales domésticas utilizando lentejas y buchón de agua en humedales artificiales

    OpenAIRE

    Rodríguez-Miranda, Juan Pablo; Gómez, Esteban; Garavito, Laura; López, Francy

    2010-01-01

    El estudio de comparación del tratamiento de aguas residuales domésticas utilizando sistemas naturales como los humedales artificiales presenta resultados de remoción de materia orgánica (DBO5) de entre 70 y 86% al utilizar el buchón de agua, y de 58% cuando se utiliza lenteja de agua. El sistema de humedales artificiales se comporta hidráulicamente como un modelo de flujo pistón, sin distinción del tipo de planta acuática que se use. Durante la experimentación se observó que cuando se utiliz...

  1. PRODUCCIÓN DE BIOMASA Y EXOPOLISACÁRIDOS DE Grifóla frondosa BAJO CULTIVO SUMERGIDO UTILIZANDO FUENTES DE CARBONO NO CONVENCIONALES

    OpenAIRE

    Zapata, Paula; Rojas, Diego; Fernández, Carlos; Ramírez, David; Restrepo, Gloria; Orjuela, Viviana; Arroyave, Marcela; Gómez, Tatiana; Atehortüa, Lucía

    2007-01-01

    Grifóla frondosa es un hongo Basidiomycete comestible y medicinal que produce polisacáridos tipo glucanos (β-1,6 y β-1,3) con actividad antitumoral e inmunomoduladora. Para el presente trabajo, el objetivo fue evaluar la incidencia de diferentes fuentes de carbono (FC) en la producción de biomasa y exopolisacári-dos (EPS), bajo condiciones de cultivo sumergido, utilizando un diseño estadístico factorial con dos factores: fuente de carbono (FC(1-7)) y medio (MB y MS). La máxima produ...

  2. Estudio cinético de una fermentación alcohólica utilizando miel de abejas como sustrato

    Directory of Open Access Journals (Sweden)

    José Ángel Gómez

    1997-01-01

    Full Text Available El artículo describe un estudio cinético de una fermentación alcohólica utilizando miel de abejas como sustrato; para este efecto se realizaron nueve fermentaciones en proceso discontinuo con un volumen, de 10 L, siguiendo el comportamiento de las concentraciones de sustrato, biomasa y producto en el tiempo. Se evaluó la conveniencia de factores como la agitación y la adición de nutrientes, además, se observa el efecto de las concentraciones iniciales de sustrato e inocula y el tipo de miel.

  3. Nuclear scales

    International Nuclear Information System (INIS)

    Friar, J.L.

    1998-01-01

    Nuclear scales are discussed from the nuclear physics viewpoint. The conventional nuclear potential is characterized as a black box that interpolates nucleon-nucleon (NN) data, while being constrained by the best possible theoretical input. The latter consists of the longer-range parts of the NN force (e.g., OPEP, TPEP, the π-γ force), which can be calculated using chiral perturbation theory and gauged using modern phase-shift analyses. The shorter-range parts of the force are effectively parameterized by moments of the interaction that are independent of the details of the force model, in analogy to chiral perturbation theory. Results of GFMC calculations in light nuclei are interpreted in terms of fundamental scales, which are in good agreement with expectations from chiral effective field theories. Problems with spin-orbit-type observables are noted

  4. Nuclear forces

    International Nuclear Information System (INIS)

    Holinde, K.

    1990-01-01

    In this paper the present status of the meson theory of nuclear forces is reviewed. After some introductory remarks about the relevance of the meson exchange concept in the era of QCD and the empirical features of the NN interaction, the exciting history of nuclear forces is briefly outlined. In the main part, the author gives the basic physical ideas and sketch the derivation of the one-boson-exchange model of the nuclear force, in the Feynman approach. Secondly we describe, in a qualitative way, various necessary extensions, leading to the Bonn model of the N interaction. Finally, points to some interesting pen questions connected with the extended quark structure of the hadrons, which are topics of current research activity

  5. Nuclear astrophysics

    International Nuclear Information System (INIS)

    Penionzhkevich, Yu. E.

    2010-01-01

    The International Year of Astronomy 2009 (IYA2009) was declared by the 62nd General Assembly of the United Nations and was also endorsed by UNESCO. Investigations in the realms of particle and nuclear physicsmake a large contribution in the development of our ideas of the properties of the Universe. The present article discusses some problems of the evolution of the Universe, nucleosyntheses, and cosmochronology from the point of view of nuclear and particle physics. Processes occurring in the Universe are compared with the mechanisms of the production and decay of nuclei, as well as with the mechanisms of their interaction at high energies. Examples that demonstrate the potential of nuclearphysics methods for studying cosmic objects and the properties of the Universe are given. The results that come from investigations into nuclear reactions induced by beams of radioactive nuclei and which make it possible to take a fresh look at the nucleosynthesis scenario in the range at light nuclei are presented.

  6. Nuclear scales

    Energy Technology Data Exchange (ETDEWEB)

    Friar, J.L.

    1998-12-01

    Nuclear scales are discussed from the nuclear physics viewpoint. The conventional nuclear potential is characterized as a black box that interpolates nucleon-nucleon (NN) data, while being constrained by the best possible theoretical input. The latter consists of the longer-range parts of the NN force (e.g., OPEP, TPEP, the {pi}-{gamma} force), which can be calculated using chiral perturbation theory and gauged using modern phase-shift analyses. The shorter-range parts of the force are effectively parameterized by moments of the interaction that are independent of the details of the force model, in analogy to chiral perturbation theory. Results of GFMC calculations in light nuclei are interpreted in terms of fundamental scales, which are in good agreement with expectations from chiral effective field theories. Problems with spin-orbit-type observables are noted.

  7. Nuclear waste

    International Nuclear Information System (INIS)

    Anon.

    1996-01-01

    The NEA Nuclear Waste Bulletin has been prepared by the Radiation Protection and Waste Management Division of the OECD Nuclear Energy Agency to provide a means of communication amongst the various technical and policy groups within the waste management community. In particular, it is intended to provide timely and concise information on radioactive waste management activities, policies and programmes in Member countries and at the NEA. It is also intended that the Bulletin assists in the communication of recent developments in a variety of areas contributing to the development of acceptable technology for the management and disposal of nuclear waste (e.g., performance assessment, in-situ investigations, repository engineering, scientific data bases, regulatory developments, etc)

  8. Nuclear policy

    International Nuclear Information System (INIS)

    Ford, G.R.

    1976-01-01

    Then-President Gerald Ford outlines the potential benefits of nuclear power as opposed to the danger of proliferation. He points out that not all nations have the same interest or views toward nuclear energy; but also he says that if a choice must be made, nonproliferation objectives must take precedence over economic and energy benefits. It is pointed out that the management of nuclear energy can be only partial and temporary by technical measures, and that full management can result only if nations realistically face the task prepared to forego preconceived short-term advantages in favor of long-term gains. Coordination of the policies of all nations toward the common goal of nonproliferation is predicted to lead to success

  9. Nuclear proliferation and terrorism

    International Nuclear Information System (INIS)

    Anon.

    1977-01-01

    This section of the book, Part III, has two chapters (9 and 10). Chapter 9, Nuclear Power and Proliferation of Nuclear Weapons, is disucssed under these subjects: nuclear nonproliferation: origins and status; requirements for nuclear weapons manufacture; current nuclear programs and proliferation capabilities; encouraging decisions to forego weapons; arms control; safeguards; attitudes and expectations. Chapter 10, Nuclear Terrorism, discusses these areas: theft of nuclear materials; attacks on nuclear reactors; responding to nuclear terrorism; security and civil liberties

  10. Nuclear politics

    International Nuclear Information System (INIS)

    Hall, Tony.

    1986-01-01

    Written by an arts graduate journalist this is intended for a non-technical general readership. It chronicles the history of the nuclear power industry in Britain from its beginnings, which were inextricably tied to the development of the atomic bomb, to the Sellafield investigation and Sizewell public inquiry. In particular the government decisions which have influenced the present structure and state of the industry are criticised. With important decisions about to be made the author questions the accountability of the nuclear industry and the government's ability to understand the complex technical aspects of the industry. (U.K.)

  11. Nuclear dilemma

    Energy Technology Data Exchange (ETDEWEB)

    Penn, J.

    Declaring nuclear preparedness 'immoral' helps to recreate the pacifism of 50 years ago. War itself is a dilemma, not the weapons with which it is waged. We must ask of the anti-war proposals: whom do they benefit. On the whole people concerned are ordinary citizens who are fearful of nuclear incineration. But marching with them is a spectrum of forces with other motivations and purposes. In a real life situation of international tension or crises, numbers of weapons in combination with their particular charateristics could mean the difference between peace and outbreak of war.

  12. Nuclear energy

    International Nuclear Information System (INIS)

    Lotter, A.C.

    1979-01-01

    The recent, terrifying threat of a major calamity at Pennsylvania's Three Mile Island power plant near Harrisburg reverberated across practically the whole of the civilised world. An almost incredible sequence of human and mechanical failures at this installation had stopped just short of disaster and had brought the unthinkable perilously close to happening. The accident had sprayed radioactive waste into the air and had led to the large scale evacuation of people from the endangered area, disrupted hundreds of thousands of lives and caused a crippling setback to the nuclear industry. In this article the author discusses the impact the Harrisburg incident has had on the nuclear industry

  13. Nuclear cardiology

    International Nuclear Information System (INIS)

    Bashore, T.M.; Shaffer, P.B.

    1985-01-01

    The birth of nuclear cardiology has generally been attributed to a 1927 experiment during which a radium salt was injected in one arm vein and the circulation time calculated by recording the arrival of the radioactivity in the opposite arm. This simple experiment lead to the radiocardiogram in the late 1940s that was used to measure left ventricular function and, later, cardiac output. This chapter provides a brief overview of nuclear cardiology. Methodology is presented when it is important for the understanding of test results. The use of these studies in the diagnosis and evaluation of patients with suspected cardiovascular disease is emphasized

  14. Nuclear fuel

    International Nuclear Information System (INIS)

    Azevedo, J.B.L. de.

    1980-01-01

    All stages of nuclear fuel cycle are analysed with respect to the present situation and future perspectives of supply and demand of services; the prices and the unitary cost estimation of these stages for the international fuel market are also mentioned. From the world resources and projections of uranium consumption, medium-and long term analyses are made of fuel availability for several strategies of use of different reactor types. Finally, the cost of nuclear fuel in the generation of electric energy is calculated to be used in the energetic planning of the electric sector. (M.A.) [pt

  15. Nuclear reactions

    International Nuclear Information System (INIS)

    Lane, A.M.

    1980-01-01

    In reviewing work at Harwell over the past 25 years on nuclear reactions it is stated that a balance has to be struck in both experiment and theory between work on cross-sections of direct practical relevance to reactors and on those relevant to an overall understanding of reaction processes. The compound nucleus and direct process reactions are described. Having listed the contributions from AERE, Harwell to developments in nuclear reaction research in the period, work on the optical model, neutron capture theory, reactions at doorway states with fine structure, and sum-rules for spectroscopic factors are considered in more detail. (UK)

  16. The nuclear

    International Nuclear Information System (INIS)

    2011-01-01

    This report proposes an overview of knowledge and technical aspects regarding nuclear energy. It presents the phenomenon of radioactivity and its measurement and thresholds, describes the fuel cycle, presents the different principles and types of nuclear reactors, and more precisely the pressurized water reactors and their various models (900, 1300, 1400 and 1600 MW). It presents other reactors: boiling water reactors, heavy water reactors, high temperature reactors, fourth generation reactors. It addresses the issues of wastes and releases, presents the OSPAR convention, the issues of management and safety. It presents the national safety bodies (ASN, IRSN, HCTISM) and international bodies

  17. Nuclear medicine

    International Nuclear Information System (INIS)

    Reichelt, H.G.

    1980-01-01

    Nuclear medicine as a complex diagnostical method is used mainly to detect functional organic disorders, to locate disorders and for radioimmunologic assays (RIA) in vitro. In surgery, its indication range comprises the thyroid (in vivo and in vitro), liver and bile ducts, skeletal and joint diseases, disorders of the cerebro-spinal liquor system and the urologic disorders. In the early detection of tumors, the search for metastases and tumor after-care, scintiscanning and the tumor marcher method (CEA) can be of great practical advantage, but the value of myocardial sciritiscanning in cardiac respectively coronary disorders is restricted. The paper is also concerned with the radiation doses in nuclear medicine. (orig.) [de

  18. Nuclear energy and nuclear technology

    International Nuclear Information System (INIS)

    Luescher, E.

    1982-01-01

    This book originated in the training courses for teachers of grammar- and secondary schools in Dillingen (Bavaria). The aim of these courses is to become informed about the latest state in one field of physics. The lectures are well-known experts in the respective fields. In the latest study (1980) of the National Academy of Sciences the experts came to the conclusion that without further development nuclear power plants the utilization of too much coal would become necessary and involve irreversible environmental damage (see chapter 6). There are two important obstacles impeding the further extension of nuclear energy. The first problem to be solved is the processing and storage of radioactive waste. This is a more technical task and can be treated in a satisfactory way. The second obstacle is less easy to take as the population has to be convinced that a nuclear power plant can be operated with almost unbelievable safety (see chapter 5) and be shut down safely in the case of incidents. The most promising possibility of controlled nuclear fusion as energy source is still many decades- if feasible at all- away from being performed (see chapter. 7). In the Soviet Union 25% of the electric energy production shall be proceed from nuclear power plants by the year 1990. (orig./GL) [de

  19. Nuclear winter or nuclear fall?

    Science.gov (United States)

    Berger, André

    Climate is universal. If a major modern nuclear war (i.e., with a large number of small-yield weapons) were to happen, it is not even necessary to have a specific part of the world directly involved for there to be cause to worry about the consequences for its inhabitants and their future. Indeed, smoke from fires ignited by the nuclear explosions would be transported by winds all over the world, causing dark and cold. According to the first study, by Turco et al. [1983], air surface temperature over continental areas of the northern mid-latitudes (assumed to be the nuclear war theatre) would fall to winter levels even in summer (hence the term “nuclear winter”) and induce drastic climatic conditions for several months at least. The devastating effects of a nuclear war would thus last much longer than was assumed initially. Discussing to what extent these estimations of long-term impacts on climate are reliable is the purpose of this article.

  20. Nuclear crime

    International Nuclear Information System (INIS)

    Braun, P.; Ferchland, B.

    1993-01-01

    The article discusses the legal provisions (Criminal Code (StGB), weapons Control Act) applicable in Germany to combat illegal trading of nuclear fuels and other readioactive materials. The authors conclude that part of the provisions are not in live with the rights and duties of the police, and they evolve near-practice proposals for remedy and legal improvement. (hP) [de

  1. Nuclear reactor

    International Nuclear Information System (INIS)

    Mysels, K.J.; Shenoy, A.S.

    1976-01-01

    A nuclear reactor is described in which the core consists of a number of fuel regions through each of which regulated coolant flows. The coolant from neighbouring fuel regions is combined in a manner which results in an averaging of the coolant temperature at the outlet of the core. By this method the presence of hot streaks in the reactor is reduced. (UK)

  2. Nuclear energy

    International Nuclear Information System (INIS)

    Reuss, Paul

    2012-01-01

    With simple and accessible explanations, this book presents the physical principles, the history and industrial developments of nuclear energy. More than 25 years after the Chernobyl accidents and few months only after the Fukushima one, it discusses the pros and cons of this energy source with its assets and its risks. (J.S.)

  3. Nuclear imaging

    International Nuclear Information System (INIS)

    Miller, J.H.; Reid, B.S.

    1985-01-01

    Nuclear imaging, utilizing relatively low photon energy emitting isotopes, allows an assessment of anatomic configuration and organ function. This method of imaging is predicted on the utilization of physiologically active radioisotope-labeled compounds or biologically active radioisotopes. Localization of such isotopes in normal or abnormal concentrations may be due to varying physiological or pathological mechanisms

  4. Nuclear Energy

    International Nuclear Information System (INIS)

    1982-11-01

    A brief indication is given of the United Kingdom nuclear power programme including descriptions of the fission process, the Magnox, AGR and PWR type reactors, the recycling process, waste management and decommissioning, safety precautions, the prototype fast reactor at Dounreay, and the JET fusion experiment. (U.K.)

  5. Nuclear physics

    International Nuclear Information System (INIS)

    Guzman B, O.; Vallejo M, J.I.; Cardenas C, H.F.

    1989-01-01

    A historical review of the evolution of the Nuclear Physics Section at the IAN is presented along the 30 years of existence of the Institute. Objectives, structure, programs and goal are historically examined. Present status of the section and its projection on national development is also analyzed

  6. Nuclear films

    International Nuclear Information System (INIS)

    Malone, Peter.

    1985-01-01

    This booklet is a resource for the study of feature films that highlight the theme of nuclear war. It provides basic credits and brief indication of the theme, treatment, quality and particular notable aspects; and a series of questions raised by the film. Seventy feature films and thirty documentaries are examined

  7. Nuclear reactions

    International Nuclear Information System (INIS)

    Corner, J.; Richardson, K.; Fenton, N.

    1990-01-01

    Nuclear reactions' marks a new development in the study of television as an agency of public policy debate. During the Eighties, nuclear energy became a major international issue. The disasters at Three-mile Island and Chernobyl created a global anxiety about its risks and a new sensitivity to it among politicians and journalists. This book is a case-study into documentary depictions of nuclear energy in television and video programmes and into the interpretations and responses of viewers drawn from many different occupational groupings. How are the complex and specialist arguments about benefit, risk and proof conveyed through the different conventions of commentary, interview and film sequence? What symbolic associations does the visual language of television bring to portrayals of the issue? And how do viewers make sense of various and conflicting accounts, connecting what they see and hear on the screen with their pre-existing knowledge, experience and 'civic' expectations. The authors examine some of the contrasting forms and themes which have been used by programme makers to explain and persuade, and then give a sustained analysis of the nature and sources of viewers' own accounts. 'Nuclear Reactions' inquires into the public meanings surrounding energy and the environment, spelling out in its conclusion some of the implications for future media treatments of this issue. It is also a key contribution to the international literature on 'television knowledge' and the processes of active viewing. (author)

  8. Nuclear fragmentation

    International Nuclear Information System (INIS)

    Chung, K.C.

    1989-01-01

    An introduction to nuclear fragmentation, with emphasis in percolation ideas, is presented. The main theoretical models are discussed and as an application, the uniform expansion approximation is presented and the statistical multifragmentation model is used to calculate the fragment energy spectra. (L.C.)

  9. Nuclear physics

    International Nuclear Information System (INIS)

    1990-01-01

    This work describes the actual situation of nuclear physics in Brazil as well as its perspectives of developments and real needs in the next decade. It discusses the main projects and the financing of brazilian research groups and Universities. (A.C.A.S.)

  10. Nuclear waste

    International Nuclear Information System (INIS)

    1990-06-01

    DOE estimates that disposing of radioactive waste from civilian nuclear power plants and its defense-related nuclear facilities could eventually end up costing $32 billion. To pay for this, DOE collects fees from utilities on electricity generated by nuclear power plants and makes payments from its defense appropriation. This report states that unless careful attention is given to its financial condition, the nuclear waste program is susceptible to future shortfalls. Without a fee increase, the civilian-waste part of the program may already be underfunded by at least $2.4 billion (in discounted 1988 dollars). Also, DOE has not paid its share of cost-about $480 million-nor has it disclosed this liability in its financial records. Indexing the civilian fee to the inflation rate would address one major cost uncertainty. However, while DOE intends to do this at an appropriate time, it does not use a realistic rate of inflation as its most probable scenario in assessing whether that time has arrived

  11. Composición de sedimentos en las zonas costeras de Costa Rica utilizando Fluorescencia de Rayos-X (FRX

    Directory of Open Access Journals (Sweden)

    Alfonso Salazar M

    2004-12-01

    Full Text Available Utilizando Fluorescencia de Rayos-X dispersiva en energía, que permite la evaluación simultánea de los isótopos estables de trece elementos, se analizaron setenta y cuatro muestras de sedimentos marinos de las regiones intermareales para las costas del Caribe y del Pacífico Norte, Central y Sur de Costa Rica. Los elementos calcio y hierro fueron los más abundantes y son representativos del origen de la formación natural del sedimento, estando el primero asociado a procesos biogénicos, tales como sistemas arrecifales coralinos cercanos al sitio de muestreo y el segundo esta asociado mas bien a sedimentos de carácter litogénico. En general, las playas del Pacífico Norte mostraron la mayor concentración de calcio lo que es indicativo de mayor existencia de estructuras arrecifales en sus alrededores. El análisis de los elementos traza, ligados a un origen terrígeno, muestras un patrón similar al hierro en la mayoría de las regiones. Las playas del Pacífico Central y Sur muestran las mayores concentraciones de estos elementos traza, indicando una mayor contribución terrígena y/o poco contribución de carbonato de calcio debido al escaso desarrollo de estructuras coralinas en estas regiones. Por último, el análisis no mostró evidencia de contaminación antropogénica y solo una sección al norte de la Playa Puerto Viejo presentaron concentraciones altas de plomo zinc y titanio, lo cual podría estar ligado a fuentes hidrotermales en esta regiónUsing an energy dispersive X-Ray fluorescence analysis, simultaneous evaluation of K, Ca, Ti, Cr, Mn, Ge, Ni, Cu, Zn, Br, Rb, Sr and Pb in 74 marine sediment samples from the Costa Rica intertidal zones was conducted. Samples were collected between June 1999 and December 2001, from Caribbean and Pacific beaches of Costa Rica. Calcium and iron showed the highest abundances and are indicators of the natural origin of the sediments. Calcium is associated with biogenic processes such as coral

  12. Detección en línea de onda-P en sismogramas 3-D utilizando redes neuronales

    Directory of Open Access Journals (Sweden)

    Alzate Carlos

    2003-08-01

    Full Text Available

    We have developed a P-wave arrival time detector of tectonic events over digital three-component records online. This process uses two different methods: the first one works with a LVR detector, and the second one uses a statistical classifier of classes (signal with P-wave and signal with seismic noise. Detection uses multi-layer perceptron neural network where is taken advantage of non-lineal input-output, relation, well-generalization, low computational demands, etc. These appropriate qualities for real time signal processing. The input data for the system becomes a normalized vector of seismic signal and its polarization arguments. Testes were done with data from IRIS and INGEOMINAS database. Although the system has a good perforance, its accuracy is not acceptable.

    Se desarrolla un detector en línea del tiempo de arribo de ondas P sobre registros electrónicos de tres componentes de eventos tectónicos. Se lleva a cabo la detección en línea de la onda-p empleando redes neuronales (RN, utilizando dos diferentes formas: en la primera se sintetiza el detector de LRV, mientras en la segunda se desarrolla un clasificador estadístico con las respectivas clases (señal con onda-p presente y señal con solo ruido presente. La detección se realiza empleando redes neuronales de tipo perceptrón multi-capa, en las cuales se aprovechan las siguientes cualidades: su capacidad de mapeo no lineal de entrada-salida, buena generalización, bajo costo computacional, entre otras. Las anteriores cualidades hacen que las RN sean apropiadas para el proceso de señales en tiempo real. Las entradas a la RN corresponden a

  13. Nuclear safety culture and nuclear safety supervision

    International Nuclear Information System (INIS)

    Chai Jianshe

    2013-01-01

    In this paper, the author reviews systematically and summarizes up the development process and stage characteristics of nuclear safety culture, analysis the connotation and characteristics of nuclear safety culture, sums up the achievements of our country's nuclear safety supervision, dissects the challenges and problems of nuclear safety supervision. This thesis focused on the relationship between nuclear safety culture and nuclear safety supervision, they are essential differences, but there is a close relationship. Nuclear safety supervision needs to introduce some concepts of nuclear safety culture, lays emphasis on humanistic care and improves its level and efficiency. Nuclear safety supervision authorities must strengthen nuclear safety culture training, conduct the development of nuclear safety culture, make sure that nuclear safety culture can play significant roles. (author)

  14. Estudio de las características fisicoquímicas de los carbones mesoporosos obtenidos utilizando sílica mesoporosa tipo SBA-16 como molde

    Directory of Open Access Journals (Sweden)

    Leidy Hoyos

    2010-01-01

    Full Text Available En este trabajo se determinan las características porosas y químicas de carbones mesoporosos sintetizados utilizando sílica mesoporosa tipo SBA- 16 como molde y se correlacionan estas características con la capacidad de adsorció de colorantes, lo cual a su vez se constituye en una técnica mas de caracterización fisicoquímica de estos materiales. Se utilizan dos moldes silíceos tipo SBA-16 con diferencias en su porosidad y sacarosa y etileno como fuente de carbón. Se encuentra que el tamaño, volumen de poro y área superficial de estos materiales se pueden modular mediante la selección del molde pero no sus características químicas. Los carbones mesoporosos se sintetizan por el método húmedo, en el cual se utiliza sacarosa como fuente de carbono o por deposición de vapores de etileno utilizando dos sílicas mesporosas con diferentes características de porosidad.

  15. The Arabidopsis Nuclear Pore and Nuclear Envelope

    OpenAIRE

    Meier, Iris; Brkljacic, Jelena

    2010-01-01

    The nuclear envelope is a double membrane structure that separates the eukaryotic cytoplasm from the nucleoplasm. The nuclear pores embedded in the nuclear envelope are the sole gateways for macromolecular trafficking in and out of the nucleus. The nuclear pore complexes assembled at the nuclear pores are large protein conglomerates composed of multiple units of about 30 different nucleoporins. Proteins and RNAs traffic through the nuclear pore complexes, enabled by the interacting activities...

  16. Sediment Radiochronology Using Coastal {sup 210P}b: Model, Validation and Applications (Spanish Edition); Radiocronologia de Sedimentos Costeros Utilizando {sup 210}Pb: Modelos, Validacion y Aplicaciones

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez-Cabeza, Joan-Albert; Diaz-Asencio, Misael; Ruiz-Fernandez, Ana Carolina [eds.

    2012-07-01

    Gran Caribe. En Johannesburgo 2002 se propuso y aprobo una Iniciativa Caribena para el Desarrollo Sostenible. Su objetivo es la gestion integral de ecosistemas marinos costeros a traves de la implementacion de planes de accion regionales. En 2005 los Jefes de Estado de la Asociacion de Estados del Caribe firmaron la Declaracion de Panama, la cual afirma que el Mar Caribe es un patrimonio comun de la region y se tomaron decisiones para apoyar la resolucion de la Organizacion de las Naciones Unidas para 'Promocionar una Gestion Integrada del Area del Mar del Caribe en el Contexto del Desarrollo Sostenible'. Estas iniciativas estaban dirigidas a la adopcion de acciones concretas en diferentes areas del desarrollo sostenible como la biodiversidad, recursos acuaticos y vulnerabilidad, prestando atencion a aspectos sociales y economicos. En 2006, la Asamblea General de las Naciones Unidas adopto la resolucion 'Hacia el desarrollo sostenible del Mar Caribe para las generaciones presentes y futuras'. En el ano 2007, la OIEA inicio un proyecto de 4 anos sobre la 'Aplicacion de tecnicas nucleares en la solucion de problemas especificos del manejo integrado de las zonas costeras en el Caribe', RLA/7/012. El objetivo del proyecto era desarrollar y mejorar las capacidades para reducir la degradacion por causas humanas de los ecosistemas costeros de la region del Gran Caribe utilizando tecnicas nucleares, en apoyo de la gestion integrada de la zona costera. Este proyecto esta alineado con los objetivos del OIEA en medio ambiente, en particular 'facilitando el uso sostenible de los recursos naturales donde los isotopos pueden mejorar el conocimiento de sistemas naturales que permita, por ejemplo, la prediccion de tendencias futuras globales a partir del pasado y la evaluacion global de recursos'. En el proyecto participan Colombia, Costa Rica, Cuba, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Republica Dominicana y Venezuela, con el apoyo del Centro de

  17. The nuclear controversy

    International Nuclear Information System (INIS)

    Walske, C.; Dobkin, R.A.

    1984-01-01

    The article deals with the nuclear controversy, especially in the United States. To a certain extent the nuclear debate has become heavily politicised. Public opinion and anti-nuclear groups are mentioned as well as nuclear disarmament

  18. Institute for Nuclear Research and Nuclear Energy and Nuclear Science

    International Nuclear Information System (INIS)

    Stamenov, J.

    2004-01-01

    The Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences is the leading Bulgarian Institute for scientific investigations and applications of nuclear science. The main Institute's activities in the field of elementary particles and nuclear physics, high energy physics and nuclear energy, radiochemistry, radioecology, radioactive wastes treatment, monitoring of the environment, nuclear instruments development ect. are briefly described. Several examples for: environmental radiation monitoring; monitoring of the radioactivity and heavy metals in aerosols, 99m Tc clinical use, Boron Neutron Capture Therapy application of IRT-2000 Research Reactor, neutron fluence for reactor vessel embrittlement, NPP safety analysis, nuclear fuel modelling are also presented

  19. Nuclear power without nuclear weapons

    International Nuclear Information System (INIS)

    Kaiser, K.; Klein, F.J.

    1982-01-01

    In this study leading experts summarize the work of a working group meeting during several years, and they represent the state of the art of the international discussion about the non-proliferation of nuclear weapons. The technical basis of proliferation, the relations between energy policy and nuclear energy, as well as the development of the non-proliferation system up to the present are thoroughly studied. Special attention is paid to the further development of the instruments of the non-proliferation policy, and approaches and ways to improving the control of the fuel cycle, e.g. by means of multinational methods or by improving the control requirements are analyzed. Also the field of positive inducements and negative sanctions to prevent the proliferation as well as the question of ensured supply are elucidated in detail. A further section then analyzes the functions of the international organizations active in this field and the nuclear policy of the most important western industrial nations, the RGW-states and the threshold countries of the Third World. This volume pays special attention to the nuclear policy of the Federal Republic of Germany and to the possibilities and necessities of a further development of the non-proliferation policy. (orig.) [de

  20. Nuclear power of Korea

    International Nuclear Information System (INIS)

    Chun Bee-Ho

    2011-01-01

    National nuclear is presented. Nuclear energy safety after Fukushima, international cooperation in nuclear energy is discussed. Nuclear projects with the United Arab Emirates have been developed to build 4 nuclear power plants in the UAE - APR 1400. At the Korea-Bulgaria Industrial Committee Meeting in Sofia (March 2011) Korean side proposed Nuclear Safety Training Program in Korea for Bulgarian government officials and experts transfer of know-how and profound expertise on world-class nuclear technology and nuclear safety

  1. Nuclear power plants

    International Nuclear Information System (INIS)

    1985-01-01

    Data concerning the existing nuclear power plants in the world are presented. The data was retrieved from the SIEN (Nuclear and Energetic Information System) data bank. The information are organized in table forms as follows: nuclear plants, its status and type; installed nuclear power plants by country; nuclear power plants under construction by country; planned nuclear power plants by country; cancelled nuclear power plants by country; shut-down nuclear power plants by country. (E.G.) [pt

  2. Diseño de la ampliación de la red de comunicación de EMELNORTE utilizando fibra óptica y tecnología inalámbrica

    OpenAIRE

    Román Vásquez, Roberto Xavier; Hidalgo Lascano, Pablo William

    2010-01-01

    El presente proyecto de titulación aborda la descripción de las técnicas de transmisión de datos utilizando fibra óptica y tecnología inalámbrica. Presenta además, el diseño detallado de la ampliación de la red utilizando enlaces de comunicación requeridos por EMELNORTE para la integración de sus estaciones operativas que se encuentran distribuidas en toda su área de concesión utilizando los medios de transmisión citados. Los enlaces se dimensionan de manera que soporten la transmisión de da...

  3. Nuclear energy and the nuclear industry

    International Nuclear Information System (INIS)

    1979-01-01

    These notes have been prepared by the Department of Energy to provide information and to answer questions often raised about nuclear energy and the nuclear industry and in the hope that they will contribute to the public debate about the future of nuclear energy in the UK. The subject is dealt with under the headings; contribution of nuclear power, energy forecasts, nuclear fuels and reactor types, cost, thermal reactor strategy, planning margin, safety, nuclear licensing, unlike an atomic bomb, radiation, waste disposal, transport of nuclear materials, emergency arrangements at nuclear sites, siting of nuclear stations, security of nuclear installations, world nuclear programmes, international regulation and non-proliferation, IAEA safeguards arrangements in the UK, INFCE, and uranium supplies. (U.K.)

  4. Nuclear astrophysics: An application of nuclear physics

    International Nuclear Information System (INIS)

    Fueloep, Z.

    2005-01-01

    Nuclear astrophysics, a fruitful combination of nuclear physics and astrophysics can be viewed as a special application of nuclear physics where the study of nuclei and their reactions are motivated by astrophysical problems. Nuclear astrophysics is also a good example for the state of the art interdisciplinary research. The origin of elements studied by geologists is explored by astrophysicists using nuclear reaction rates provided by the nuclear physics community. Due to the high interest in the field two recent Nuclear Physics Divisional Conferences of the European Physical Society were devoted to nuclear astrophysics and a new conference series entitled 'Nuclear Physics in Astrophysics' has been established. Selected problems of nuclear astrophysics will be presented emphasizing the interplay between nuclear physics and astrophysics. As an example the role of 14 N(p,r) 15 O reaction rate in the determination of the age of globular clusters will be discussed in details

  5. I wonder nuclear energy

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Eun Cheol

    2009-04-15

    This book consists seven chapters, which are powerful nuclear energy, principle of nuclear fission, nuclear energy in our daily life, is nuclear energy safe?, what is radiation?, radiation spread in pur daily life and radiation like a spy. It adds nuclear energy story through quiz. This book with pictures is for kids to explain nuclear energy easily.

  6. Nuclear insurance

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    The yearbook contains among others the figures of the nuclear insurance line. According to these these the DKVG (German nuclear power plant insurance association) has 102 member insurance companies all registered in the Federal Republic of Germany. By using reinsurance capacities of the other pools at present property insurance amounts to 1.5 billion DM and liability insurance to 200 million DM. In 1991 the damage charges on account of DKV amounted to 3.1 (1990 : 4.3) million DM. From these 0.6 million DM are apportioned to payments and 2.5 million DM to reserves. One large damage would cost a maximum gross sum of 2.2 billion DM property and liability insurance; on account of DKVG 750 million DM. (orig./HSCH) [de

  7. Nuclear power

    Energy Technology Data Exchange (ETDEWEB)

    Hodgson, P.

    1985-01-01

    The question 'Do we really need nuclear power' is tackled within the context of Christian beliefs. First, an estimate is made of the energy requirements in the future and whether it can be got in conventional ways. The dangers of all the ways of supplying energy (eg coal mining, oil and gas production) are considered scientifically. Also the cost of each source and its environmental effects are debated. The consequences of developing a new energy source, as well as the consequences of not developing it, are considered. Decisions must also take into account a belief about the ultimate purpose of life, the relation of men to each other and to nature. Each issue is raised and questions for discussion are posed. On the whole the book comes down in favour of nuclear power.

  8. Nuclear reactor

    International Nuclear Information System (INIS)

    Sasaki, Tomozo.

    1987-01-01

    Purpose: To improve the nuclear reactor availability by enabling to continuously exchange fuels in the natural-slightly enriched uranium region during operation. Constitution: A control rod is withdrawn to the midway of a highly enriched uranium region by means of control rod drives and the highly enriched uranium region is burnt to maintain the nuclear reactor always at a critical state. At the same time, fresh uranium-slightly enriched uranium is continuously supplied gravitationally from a fresh fuel reservoir through fuel reservoir to each of fuel pipes in the natural-slightly enriched uranium region. Then, spent fuels reduced with the reactivity by the burn up are successively taken out from the bottom of each of the fuel pipes through an exit duct and a solenoid valve to the inside of a spent fuel reservoir and the burn up in the natural-slightly enriched uranium region is conducted continuously. (Kawakami, Y.)

  9. Nuclear reactors

    International Nuclear Information System (INIS)

    Barre, Bertrand

    2015-10-01

    After some remarks on the nuclear fuel, on the chain reaction control, on fuel loading and unloading, this article proposes descriptions of the design, principles and operations of different types of nuclear reactors as well as comments on their presence and use in different countries: pressurized water reactors (design of the primary and secondary circuits, volume and chemistry control, backup injection circuits), boiling water reactors, heavy water reactors, graphite and boiling water reactors, graphite-gas reactors, fast breeder reactors, and fourth generation reactors (definition, fast breeding). For these last ones, six concepts are presented: sodium-cooled fast reactor, lead-cooled fast reactor, gas-cooled fast reactor, high temperature gas-cooled reactor, supercritical water-cooled reactor, and molten salt reactor

  10. Nuclear waste

    International Nuclear Information System (INIS)

    1991-01-01

    The Privacy Act of 1974 restricts both the type of information on private individuals that federal agencies may maintain in their records and the conditions under which such information may be disclosed. The Nuclear Regulatory Commission, which must approve DOE plans to build a nuclear waste repository at the Yucca Mountain site in Nevada, requires a quality assurance program to guarantee that studies of the site are done by qualified employees. Under such a program, the training and qualifications of DOE and contractor employees would be verified. This report reviews DOE's efforts to identify and resolve the implications of the Privacy Act for DOE's quality assurance program and how the delay in resolving Privacy Act issues may have affected preliminary work on the Yucca Mountain project

  11. Nuclear physics

    International Nuclear Information System (INIS)

    Warner, D.D.; Aitken, T.W.; Rowley, N.

    1989-01-01

    The many diverse programmes of fundamental research and technical development at the Daresbury Nuclear Structure Facility (NSF) have continued at their usual hectic pace throughout the period 1988/89. An overview of the overall programme and of the Facility has been presented in the first volume of this report, along with an expanded discussion of some of the highlights of the year's work. This second volume presents the more technical and detailed reports on the progress and results of individuals proposals and hence will be of most interest to the more expert reader. The reports are grouped in terms of experimental studies aimed at probing the structure of individual nuclei or series of nuclei, studies devoted to probing the primary nuclear reaction mechanism itself, theoretical work and research devoted to the development of the accelerator, and experimental equipment/techniques. Overall, they provide a concise summary of the year's work at the NSF. (author)

  12. Nuclear safeguards

    International Nuclear Information System (INIS)

    Estrampres, J.

    2010-01-01

    Close cooperation with the Ministry of Industry with representation from the UNESA Safeguards Group, has meant that, after almost two years of intense meetings and negotiations, Spain has a specific plant to plant agreement for the application of Safeguards under this new method. This is an agreement which aims to be a benchmark for all other EU countries, as the IAEA tends to apply a generic agreement that, in many cases, majority interferes in the nuclear power plants own processes. (Author).

  13. Nuclear structure

    International Nuclear Information System (INIS)

    Joy, T.; Price, H.G.

    1984-01-01

    The appendix to the Daresbury Annual report contains detailed summaries of experiments carried out, or in progress, for the period 1983/84, using the Nuclear Structure Facility tandem accelerator. The experimental work is carried out by University groups from the UK and abroad, and Daresbury Staff. Developments in instrumentation, and a report on the first year of scheduled operation of the Facility, are also given. (U.K.)

  14. Nuclear terrorism

    International Nuclear Information System (INIS)

    Watson, C.

    2005-01-01

    This article is aimed at those professional scientists and engineers who believe that issues of international peace and security are too important to be left to the politicians. Nuclear Terrorism is a hostile act (or a threat of such an act) involving nuclear materials (fissile or radioactive) performed by a terrorist, a term which covers a wide range of individuals. What they all have in common is that, for some reason they have become motivated to hurt or destroy sections of society which they have come to regard as the enemy; their motivation varies enormously. They also vary enormously in the extent and nature of their technical/scientific education. There are 'PhD terrorists' and 'Peasant terrorists', and they differ greatly in the threat that they represent, and the steps which can appropriately be taken to counter it. The most serious threat comes from the potential ability of terrorists to steal or manufacture nuclear weapons of mass destruction (e.g. capable of causing thousands of deaths). Unless the underlying causes of terrorism can be quickly removed, we have a duty to mankind to make terrorist access to such weapons, and to the nuclear materials which are their essential ingredients, as difficult as possible. Improvements in the arrangements for denying unauthorised access to radioactive material should be made such that the protective measures made are proportionate to the number of Curies at risk and the likelihood of a terrorist initiative. The preventative measures, sadly, need to take account of the possibility that the terrorist will use lethal force to access the material. (author)

  15. Nuclear medicine

    International Nuclear Information System (INIS)

    Casier, Ph.; Lepage, B.

    1998-01-01

    Except for dedicated devices for mobile nuclear cardiology for instance, the market is set on variable angulation dual heads cameras. These cameras are suited for all general applications and their cost effectiveness is optimized. Now, all major companies have such a camera in their of products. But, the big question in nuclear medicine is about the future of coincidence imaging for the monitoring of treatments in oncology. Many companies are focused on WIP assessments to find out the right crustal thickness to perform both high energy FDG procedures and low energy Tc procedures, with the same SPECT camera. The classic thickness is 3/8''. Assessments are made with 1/2'', 5/8'' or 3/4'' crystals. If FDG procedures proved to be of great interest in oncology, it may lead to the design of a dedicated SPECT camera with a 1'' crustal. Due to the short half of FDG, it may be the dawning of slip ring technology. (e.g. Varicam from Elscint). The three small heads camera market seems to be depressed. Will the new three large heads camera unveiled by Picker, reverse that trend? The last important topic in nuclear medicine is the emergence of new flat digital detectors to get rid of the old bulky ones. Digirad is the first company to manufacture a commercial product based on that technology. Bichron, Siemens and General Electric are working on that development, too. But that technology is very expensive and the market for digital detection in nuclear medicine is not as large as the market in digital detection in radiology. (author)

  16. Nuclear transport

    International Nuclear Information System (INIS)

    Anon.

    2002-01-01

    During September and October 2001, 1 event has been reported and classified at the first level of the INES scale. This incident concerns the violation of the European regulation that imposes to any driver of radioactive matter of being the holder of a certificate asserting that he attended a special training. During this period, 13 in-site inspections have been made in places related to nuclear transport. (A.C.)

  17. Nuclear stethoscope

    Energy Technology Data Exchange (ETDEWEB)

    Shen, W.F.; Singer, I.; Hackworthy, R.A.; Morris, J.; Kelly, D.T. (Royal Prince Alfred Hospital, Camperdown (Australia))

    1983-05-14

    A portable, computerized nuclear probe designed to measure left ventricular function is described. The ejection fraction was reproducible and correlated well with that obtained by means of a gamma camera. The limitations of the machine are that it measures the global, rather than the segmental, function of the left ventricle and, when discrete large areas of regional dysfunction occur, the global ejection fraction may be overestimated. An advantage is that continuous beat-to-beat measurements are easily performed and displayed.

  18. Nuclear shelters

    International Nuclear Information System (INIS)

    Prendergast, L.; Prendergast, P.; Prendergast, E.J.; Prendergast, L.J.

    1982-01-01

    An underground nuclear shelter, fabricated from a series of transverse metal hoop frames connected by longitudinal metal members and plates, is described. The shelter chamber has two hatches in the roof each with a shaft fitted with a shield cover. One shaft houses an air inlet and filter, the other is used for access. Two or more shelter units can be linked. (U.K.)

  19. Nuclear decommissioning

    Energy Technology Data Exchange (ETDEWEB)

    Lawton, H.

    1987-02-01

    Sufficient work has now been done, on a world-wide basis, to justify confidence that full decommissioning of nuclear installations, both plant and reactors, can be carried out safely and efficiently. Projects in several countries should confirm this in the next few years. In the UK, good progress has been made with the WAGR and supporting development work is finding solutions to resolve uncertainties. Estimates from several sources suggest that decommissioning costs can be kept to an acceptable level.

  20. Nuclear decommissioning

    International Nuclear Information System (INIS)

    Lawton, H.

    1987-01-01

    Sufficient work has now been done, on a world-wide basis, to justify confidence that full decommissioning of nuclear installations, both plant and reactors, can be carried out safely and efficiently. Projects in several countries should confirm this in the next few years. In the UK, good progress has been made with the WAGR and supporting development work is finding solutions to resolve uncertainties. Estimates from several sources suggest that decommissioning costs can be kept to an acceptable level. (author)

  1. Nuclear reactors

    International Nuclear Information System (INIS)

    Humphreys, P.; Davidson, D.F.; Thatcher, G.

    1980-01-01

    The cooling system of a liquid metal cooled fast breeder nuclear reactor of the pool kind is described. It has an intermediate heat exchange module comprising a tube-in-shell heat exchanger and an electromagnetic flow coupler in the base region of the module. Primary coolant is flowed through the heat exchanger being driven by electromagnetic interaction with secondary liquid metal coolant flow effected by a mechanical pump. (author)

  2. Nuclear reactor

    International Nuclear Information System (INIS)

    Batheja, P.; Huber, R.; Rau, P.

    1985-01-01

    Particularly for nuclear reactors of small output, the reactor pressure vessel contains at least two heat exchangers, which have coolant flowing through them in a circuit through the reactor core. The circuit of at least one heat exchanger is controlled by a slide valve, so that even for low drive forces, particularly in natural circulation, the required even loading of the heat exchanger is possible. (orig./HP) [de

  3. Nuclear therapy

    International Nuclear Information System (INIS)

    Roux, Henry

    1977-01-01

    Having first recalled the biological action of ionizing radiations, the main problems relating to the therapeutical use of radioelements were analyzed. Stressing the good results recorded with this method for the treatment of some diseases, the present limits were also defined, stating however that the progress made in biochemistry in the direction of metabolism, combined with the progress made in nuclear medicine, still allows some hope [fr

  4. Nuclear Britain

    Energy Technology Data Exchange (ETDEWEB)

    Bunyard, P

    1981-01-01

    The subject is dealt with in chapters, entitled: (preface) the new resistance; (1) the weapons connection; (2) the AGR - a bungled programme; (3) reactor choice - a fearful dilemma; (4) the deadly atom (uranium - mining, processing, enrichment of U-235, political and international aspects); (5) the fast reactor - how safe; (6) radiation risk and cancer; (7) atomic waste - the industry's Achilles Heel; (8) accidents - the ever-present threat; (9) the growing opposition; (10) the nuclear state.

  5. Nuclear decisions

    International Nuclear Information System (INIS)

    Dunster, H.J.; Farmer, F.R.; Gaines, M.J.

    1979-01-01

    In the Correspondence section of this issue of Nature three letters are published each of which has a bearing on the article by P. Taylor in the issue of 22 February. In that article Taylor calls for changes in the way decisions are taken on nuclear energy matters. The three articles are by H.J. Dunster of the UKAEA Health and Safety Executive, F.R. Farmer, Safety Adviser to the UKAEA, and M.J. Gaines, National Radiological Protection Board. (UK)

  6. Nuclear energy

    International Nuclear Information System (INIS)

    1978-01-01

    2 1/2 years ago a consultation group was formed to help the Section for Social Questions of the Council of Churches in the Netherlands, to answer questions in the area of nuclear energy. During this time the character of the questions has changed considerably. In the beginning people spoke of fear and anxiety over the plans for the application of this new technical development but later this fear and anxiety turned to protest and opposition. This brochure has been produced to enlighten people and try and answer their alarm, by exploring the many facets of the problems. Some of these problems are already being deeply discussed by the public, others play no role in the forming of public opinion. The points of view of the churches over nuclear energy are not expressed, the brochure endeavours to express that nuclear energy problems are a concern for the churches. Technical and economic information and the most important social questions are discussed. (C.F.)

  7. Nuclear medicine

    International Nuclear Information System (INIS)

    James, A.E. Jr.; Squire, L.F.

    1977-01-01

    The book presents a number of fundamental imaging principles in nuclear medicine. The fact that low radiation doses are sufficient for the study of normal and changed physiological functions of the body is an important advancement brought about by nuclear medicine. The possibility of quantitative investigations of organs and organ regions and of an assessment of their function as compared to normal values is a fascinating new diagnostic dimension. The possibility of comparing the findings with other pathological findings and of course control in the same patient lead to a dynamic continuity with many research possibilities not even recognized until now. The limits of nuclear scanning methods are presented by the imprecise structural information of the images. When scintiscans are compared with X-ray images or contrast angiography, the great difference in the imaging of anatomical details is clearly seen. But although the present pictures are not optimal, they are a great improvement on the pictures that were considered clinically valuable a few years ago. (orig./AJ) [de

  8. Nuclear physics

    International Nuclear Information System (INIS)

    Dacre, J.

    1990-01-01

    This book fills a gap in current literature by covering the increasing nuclear physics content of various A-level syllabuses. In section 1 we outline the background and early development of the subject, in section 2 we deal with nuclear properties and theories at a level suitable for the pre-university student. The majority of topics have been treated with the limited use of mathematics, this necessitating some simplification which we hope to have accomplished without undue error. A few topics have been developed mathematically, to some extent, e.g. series decay. While it is the purpose of a book at this level to introduce the reader to the facts and theories of nuclear physics, we have to recognise that any teacher of science, at any level, must attempt to instill in the young scientist a sense of responsibility and an understanding of the problems attendant on the technological applications are important. These problems have been touched on in the text but we hope the student will be persuaded to read further; for this purpose we have added a short list of suggested additional reading. A selection of A-level past paper questions has been included. (author)

  9. Nuclear facilities

    International Nuclear Information System (INIS)

    Anon.

    2002-01-01

    During September and October 2001, 15 events were recorded on the first grade and 1 on the second grade of the INES scale. The second grade event is in fact a re-classification of an incident that occurred on the second april 2001 at Dampierre power plant. This event happened during core refueling, a shift in the operation sequence led to the wrong positioning of 113 assemblies. A preliminary study of this event shows that this wrong positioning could have led, in other circumstances, to the ignition of nuclear reactions. Even in that case, the analysis made by EDF shows that the consequences on the staff would have been limited. Nevertheless a further study has shown that the existing measuring instruments could not have detected the power increase announcing the beginning of the chain reaction. The investigation has shown that there were deficiencies in the control of the successive operations involved in refueling. EDF has proposed a series of corrective measures to be implemented in all nuclear power plants. The other 15 events are described in the article. During this period 121 inspections have been made in nuclear facilities. (A.C.)

  10. Nuclear fuels

    International Nuclear Information System (INIS)

    2008-01-01

    The nuclear fuel is one of the key component of a nuclear reactor. Inside it, the fission reactions of heavy atoms, uranium and plutonium, take place. It is located in the core of the reactor, but also in the core of the whole nuclear system. Its design and properties influence the behaviour, the efficiency and the safety of the reactor. Even if it represents a weak share of the generated electricity cost, its proper use represents an important economic stake. Important improvements remain to be made to increase its residence time inside the reactor, to supply more energy, and to improve its robustness. Beyond the economical and safety considerations, strategical questions have to find an answer, like the use of plutonium, the management of resources and the management of nuclear wastes and real technological challenges have to be taken up. This monograph summarizes the existing knowledge about the nuclear fuel, its behaviour inside the reactor, its limits of use, and its R and D tracks. It illustrates also the researches in progress and presents some key results obtained recently. Content: 1 - Introduction; 2 - The fuel of water-cooled reactors: aspect, fabrication, behaviour of UO 2 and MOX fuels inside the reactor, behaviour in loss of tightness situation, microscopic morphology of fuel ceramics and evolution under irradiation - migration and localisation of fission products in UOX and MOX matrices, modeling of fuels behaviour - modeling of defects and fission products in the UO 2 ceramics by ab initio calculations, cladding and assembly materials, pellet-cladding interaction, advanced UO 2 and MOX ceramics, mechanical behaviour of the fuel assembly, fuel during a loss of coolant accident, fuel during a reactivity accident, fuel during a serious accident, fuel management inside reactor cores, fuel cycle materials balance, long-term behaviour of the spent fuel, fuel of boiling water reactors; 3 - the fuel of liquid metal fast reactors: fast neutrons radiation

  11. The CNA-1 (Nuclear Power Plant Atucha-1) QK-01 repairing project; Proyecto de reparacion del QK-01 de CNA-1 (Central Nuclear Atucha-1)

    Energy Technology Data Exchange (ETDEWEB)

    Pizzaferri, J C [Nucleoelectrica Argentina S.A. (NASA), Buenos Aires (Argentina); Cabot, P [Comision Nacional de Energia Atomica, San Martin (Argentina). Centro Atomico Constituyentes

    1998-12-31

    The repair/maintenance of the CNA-1 QK-01 Moderator Cooler will be a leading case of the repair of a class 1 nuclear component in a high radiation environment; utilizing for the work, sophisticated remotely operated equipment. This paper describes the component, the repair-maintenance objective, and the equipment-procedures developed for the intervention. (author) 9 refs., 5 figs. [Espanol] La reparacion/mantenimiento del enfriador del moderador QK-01 de CNA-1 sera un caso sobresaliente de reparacion de un componente nuclear clase 1 en un ambiente de alta radiacion, utilizando equipamiento sofisticado de accion remota. En este trabajo se describen caracteristicas de diseno del componente, objetivos del mantenimiento, y las facilidades y procedimientos desarrollados en el marco del proyecto para realizar la tarea en cuestion. (autor)

  12. The nuclear arsenals and nuclear disarmament.

    Science.gov (United States)

    Barnaby, F

    1998-01-01

    Current world stockpiles of nuclear weapons and the status of treaties for nuclear disarmament and the ultimate elimination of nuclear weapons are summarised. The need for including stockpiles of civil plutonium in a programme for ending production and disposing of fissile materials is emphasized, and the ultimate difficulty of disposing of the last few nuclear weapons discussed.

  13. Nuclear power and the nuclear fuel cycle

    International Nuclear Information System (INIS)

    Hardy, C.J.; Silver, J.M.

    1985-09-01

    The report provides data and assessments of the status and prospects of nuclear power and the nuclear fuel cycle. The report discusses the economic competitiveness of nuclear electricity generation, the extent of world uranium resources, production and requirements, uranium conversion and enrichment, fuel fabrication, spent fuel treatment and radioactive waste management. A review is given of the status of nuclear fusion research

  14. Carga de enfermedad en la comunidad autónoma de Cataluña utilizando años de vida ajustados por discapacidad (2005-2010

    Directory of Open Access Journals (Sweden)

    Anna Cuadras Andreu

    2014-01-01

    Full Text Available Fundamentos: La carga de enfermedad permite medir la salud de la población incluyendo mortalidad y morbididad. Los objetivos de este estudio son estimar la carga de enfermedad en Cataluña, comparar los resultados con España y con la comarca del Tarragonés, y evaluar la aportación de los registros locales en la estimación de la discapacidad. Métodos: Se calcularon los años de vida perdidos ajustados por discapacidad (AVAD para 123 causas utilizando la metodología descrita por la Organización Mundial de la Salud. Las tasas estandarizadas se compararon con las españolas. En la comarca del Tarragonés, se calcularon losAVAD, se compararon con Cataluña, y para los tumores malignos se calcularon los AVAD utilizando el registro local de incidencia de cáncer. Resultados: Los AVAD en Cataluña fueron 801.140 de media anual. El 60,3% se atribuyó a discapacidad y el 39,7% a mortalidad prematura. Neuropsiquiátricas (30,9%, tumores malignos (15,8% y cardiovasculares (11,3% fueron las principales causas en AVAD. La tasa estandarizada de las enfermedades respiratorias (7,5 por 1.000 fue significativamente superior a la española. Causas perinatales (3,1 por 1.000, lesiones intencionadas (2,2 por 1.000 y enfermedades del aparato digestivo (4,9 por 1.000 fueron significativamente superiores en el Tarragonés. Los AVAD para los tumores malignos se incrementaron un 13,4% utilizando la incidencia de casos para su cálculo. Conclusiones: Las enfermedades no transmisibles aportan la mayor parte de AVAD en Cataluña. Existen diferencias entre territorios en enfermedades respiratorias, perinatales, digestivas y lesiones intencionadas. Los registros locales pueden ser muy útiles en el cálculo de los AVAD.

  15. Nuclear power economic database

    International Nuclear Information System (INIS)

    Ding Xiaoming; Li Lin; Zhao Shiping

    1996-01-01

    Nuclear power economic database (NPEDB), based on ORACLE V6.0, consists of three parts, i.e., economic data base of nuclear power station, economic data base of nuclear fuel cycle and economic database of nuclear power planning and nuclear environment. Economic database of nuclear power station includes data of general economics, technique, capital cost and benefit, etc. Economic database of nuclear fuel cycle includes data of technique and nuclear fuel price. Economic database of nuclear power planning and nuclear environment includes data of energy history, forecast, energy balance, electric power and energy facilities

  16. Degradation of ion spent resin using the Fenton's reagent; Degradacao da resina de troca ionica utilizando o reagente de Fenton

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Leandro Goulart de

    2013-07-01

    The most common method for spent radioactive ion exchange resin treatment is its immobilization in cement, which reduces the radionuclides release into the environment. Although this method is efficient, it increases considerably the final volume of the waste due to the low incorporation capacity. The objective of this work was to develop a degradation method of spent resins arising from the nuclear research reactor located at the Nuclear and Energy Research Institute (IPEN-CNEN/SP), using an Advanced Oxidation Process (AOP) with Fenton's reagents. This method would allow a higher incorporation in cement. Three different resins were evaluated: cationic, anionic and a mixture of both resins. The reactions were conducted varying the catalyst concentration (25, 50, 100 and 150 mM), the volume of hydrogen peroxide (320 to 460 mL), and three different temperatures, 50, 60 and 70 deg C. Degradation of about 98% was achieved using a 50 mM catalyst solution and 330 mL of hydrogen peroxide solution. The most efficient temperature was 60 deg C. (author)

  17. Nuclear danger and nuclear history

    International Nuclear Information System (INIS)

    Howard, M.

    1988-01-01

    This article makes a review of the books Danger and Survival: Choices about the Bomb in the First Fifty Years written by McGeorge Bundy, and War and Peace in the Nuclear Age written by John Newhouse. A history of political decisions on weapon development is given, along with a what if analysis of other options. The lesson of these two books is that it has proved considerably easier to live with nuclear weapons and the Soviet Union than anyone expected forty years ago. It is all the easier if arms control issues, based on worst case analyses, are kept in their place, which is firmly in the background of the overall conduct of foreign policy

  18. Artrodese na coluna cervical utilizando SICAP como substituto de enxerto ósseo Artrodesis en la columna cervical utilizando SICAP como sustituto de injerto óseo Cervical spine fusion utilizing silicated calcium phosphate bone graft substitute (SICAP

    Directory of Open Access Journals (Sweden)

    Juliano Fratezi

    2011-01-01

    Full Text Available OBJETIVO: Substitutos de enxerto ósseo autólogo foram desenvolvidos para evitar as complicações da retirada de enxerto ósseo autólogo. SiCaP (Actifuse, ApaTech EUA, Reino Unido é um enxerto ósseo composto de cálcio-fosfato com um substituição de silicato na estrutura química, com uma estrutura tridimensional que parece osso natural. MÉTODOS: 19 pacientes foram submetidos à fusão óssea cervical e analisados retrospectivamente. A avaliação radiográfica e avaliação clínica foram realizadas utilizando o questionário Neck Disability Index e a escala análoga da dor (VAS pré- e pós-operação. RESULTADOS: O período médio de acompanhamento pós-operatório foi de 14 meses ± 5 meses (7-30 meses. 11 pacientes foram submetidos à fusão via anterior; 5 pacientes via posterior e 3 pacientes via anterior e posterior. A revisão radiográfica mostrou 19/19 (100% de fusão óssea, nenhum caso apresentou subsidência, quebra ou soltura de material de implante ou movimento nos níveis fusionados. Nenhum exemplo de ossificação heterotópica ou de crescimento ósseo intracanal foi observado. Clinicamente, os escores médios do Neck Disability decresceram 13,3 pontos (media pré-op. de 34,5, pós-op. de 21,2, melhora de 39%, a média da VAS para dor cervical decresceu 2 pontos (2,7 pré-op para 0,7 pós-op.; melhora de 74,1%. Não foram observadas complicações como infecção, osteólise ou edema excessivo das partes moles. CONCLUSÃO: Os resultados preliminares obtidos nesta série foram encorajadores com o uso do SICaP como enxerto ósseo, com sólida fusão óssea obtida em todos os casos e sem formação de ossificação heterotópica ou crescimento de osso intracanal. SIcaP demonstra ser um substituto confiável para o enxerto ósseo autólogo na coluna cervical.OBJETIVO: Sustitutos de injerto óseo autólogo fueron desarrollados para evitar las complicaciones de la recogida de injerto óseo autólogo. SiCaP (Actifuse, Apa

  19. Nuclear Law: A Key Against Nuclear Terrorism

    International Nuclear Information System (INIS)

    Cardozo, P.

    2004-01-01

    The role of the legal instruments in the war against nuclear terrorism. Control of radioactive sources. Elements of Nuclear Law: Definition: it is the body of special legislation that regulates the pacific uses of nuclear energy and the conduct of the persons engaged in activities related to fissionable materials and ionizing radiation . Objective: to provide a legal framework in order to protect individuals , property and the environment against the harmful effects of the use of nuclear energy and ionising radiation. Principles of nuclear energy legislation: safety principle, exclusively operator responsibility, authorization, independence of the regulatory body, inspections and enforcement, nuclear damage compensation, international cooperation. National regulatory infrastructure. Establishment of special law in Emergency Preparedness for nuclear or radiological disaster. IAEA Conventions. Transportation of nuclear material. IAEA regulations on radioactive material. Compensation for nuclear damage. Nuclear safety, security and terrorism. International and domestic instruments. Anti terrorism acts. International agreements on Safety Cooperation. (Author)

  20. Nuclear tele medicine; Telemedicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Vargas, L.; Hernandez, F.; Fernandez, R. [Departamento de Medicina Nuclear, Imagenologia Diagnostica, Xalapa, Veracruz (Mexico)

    2005-07-01

    The great majority of the digital images of nuclear medicine are susceptible of being sent through internet. This has allowed that the work in diagnosis cabinets by image it can benefit of this modern technology. We have presented in previous congresses works related with tele medicine, however, due to the speed in the evolution of the computer programs and the internet, becomes necessary to make a current position in this modality of work. (Author)

  1. Applications of nuclear physics

    Science.gov (United States)

    Hayes, A. C.

    2017-02-01

    Today the applications of nuclear physics span a very broad range of topics and fields. This review discusses a number of aspects of these applications, including selected topics and concepts in nuclear reactor physics, nuclear fusion, nuclear non-proliferation, nuclear-geophysics, and nuclear medicine. The review begins with a historic summary of the early years in applied nuclear physics, with an emphasis on the huge developments that took place around the time of World War II, and that underlie the physics involved in designs of nuclear explosions, controlled nuclear energy, and nuclear fusion. The review then moves to focus on modern applications of these concepts, including the basic concepts and diagnostics developed for the forensics of nuclear explosions, the nuclear diagnostics at the National Ignition Facility, nuclear reactor safeguards, and the detection of nuclear material production and trafficking. The review also summarizes recent developments in nuclear geophysics and nuclear medicine. The nuclear geophysics areas discussed include geo-chronology, nuclear logging for industry, the Oklo reactor, and geo-neutrinos. The section on nuclear medicine summarizes the critical advances in nuclear imaging, including PET and SPECT imaging, targeted radionuclide therapy, and the nuclear physics of medical isotope production. Each subfield discussed requires a review article unto itself, which is not the intention of the current review; rather, the current review is intended for readers who wish to get a broad understanding of applied nuclear physics.

  2. Applications of nuclear physics

    International Nuclear Information System (INIS)

    Hayes-Sterbenz, Anna Catherine

    2017-01-01

    Today the applications of nuclear physics span a very broad range of topics and fields. This review discusses a number of aspects of these applications, including selected topics and concepts in nuclear reactor physics, nuclear fusion, nuclear non-proliferation, nuclear-geophysics, and nuclear medicine. The review begins with a historic summary of the early years in applied nuclear physics, with an emphasis on the huge developments that took place around the time of World War II, and that underlie the physics involved in designs of nuclear explosions, controlled nuclear energy, and nuclear fusion. The review then moves to focus on modern applications of these concepts, including the basic concepts and diagnostics developed for the forensics of nuclear explosions, the nuclear diagnostics at the National Ignition Facility, nuclear reactor safeguards, and the detection of nuclear material production and trafficking. The review also summarizes recent developments in nuclear geophysics and nuclear medicine. The nuclear geophysics areas discussed include geo-chronology, nuclear logging for industry, the Oklo reactor, and geo-neutrinos. The section on nuclear medicine summarizes the critical advances in nuclear imaging, including PET and SPECT imaging, targeted radionuclide therapy, and the nuclear physics of medical isotope production. Lastly, each subfield discussed requires a review article unto itself, which is not the intention of the current review; rather, the current review is intended for readers who wish to get a broad understanding of applied nuclear physics.

  3. Glossary of nuclear energy

    International Nuclear Information System (INIS)

    Seo, Du Hwan

    1987-01-01

    This book gives descriptions of explanations of terminologies concerning to nuclear energy such as analysis of financial safety of nuclear energy, radwaste disposal, fast breeder reactor, nuclear reactor and device, nuclear fuel and technique for concentration, using of nuclear energy radiation and measurement, plan for development of nuclear energy and international institution. This book includes 160 terms on nuclear energy and arranges in Korean alphabetical order.

  4. Nuclear energy - some aspects

    International Nuclear Information System (INIS)

    Bandeira, Fausto de Paula Menezes

    2005-05-01

    This work presents a brief history of research and development concerning to nuclear technology worldwide and in Brazil, also information about radiations and radioactive elements as well; the nuclear technology applications; nuclear reactor types and functioning of thermonuclear power plants; the number of existing nuclear power plants; the nuclear hazards occurred; the national fiscalization of nuclear sector; the Brazilian legislation in effect and the propositions under proceduring at House of Representatives related to the nuclear energy

  5. Nuclear Installations Act 1965

    International Nuclear Information System (INIS)

    1965-01-01

    This Act governs all activities related to nuclear installations in the United Kingdom. It provides for the licensing procedure for nuclear installations, the duties of licensees, the competent authorities and carriers of nuclear material in respect of nuclear occurrences, as well as for the system of third party liability and compensation for nuclear damage. The Act repeals the Nuclear Installations (Licensing and Insurance) Act 1959 and the Nuclear Installations (Amendment Act) 1965 except for its Section 17(2). (NEA) [fr

  6. Applications of Nuclear Physics

    OpenAIRE

    Hayes, Anna C.

    2017-01-01

    Today the applications of nuclear physics span a very broad range of topics and fields. This review discusses a number of aspects of these applications, including selected topics and concepts in nuclear reactor physics, nuclear fusion, nuclear non-proliferation, nuclear-geophysics, and nuclear medicine. The review begins with a historic summary of the early years in applied nuclear physics, with an emphasis on the huge developments that took place around the time of World War II, and that und...

  7. Nuclear emergencies

    International Nuclear Information System (INIS)

    1991-01-01

    This leaflet, which is in the form of a fold-up chart, has panels of text which summarize the emergencies that could arise and the countermeasures and emergency plans that have been prepared should nuclear accident occur or affect the United Kingdom. The levels of radiation doses at which various measures would be introduced are outlined. The detection and monitoring programmes that would operate is illustrated. The role of NRPB and the responsible government departments are set out together with an explanation of how the National Arrangements for Incidents involving Radioactivity would be coordinated. (UK)

  8. Nuclear reactor

    International Nuclear Information System (INIS)

    Scholz, M.

    1976-01-01

    An improvement of the accessibility of that part of a nuclear reactor serving for biological shield is proposed. It is intended to provide within the biological shield, distributed around the circumference of the reactor pressure vessel, several shielding chambers filled with shielding material, which are isolated gastight from the outside by means of glass panes with a given bursting strength. It is advantageous that, on the one hand, inspection and maintenance will be possible without great effort and, on the other, a large relief cross section will be at desposal if required. (UWI) [de

  9. Nuclear recycling

    International Nuclear Information System (INIS)

    Spinrad, B.I.

    1985-01-01

    This paper discusses two aspects of the economics of recycling nuclear fuel: the actual costs and savings of the recycling operation in terms of money spent, made, and saved; and the impact of the recycling on the future cost of uranium. The authors review the relevant physical and chemical processes involved in the recycling process. Recovery of uranium and plutonium is discussed. Fuel recycling in LWRs is examined and a table presents the costs of reprocessing and not reprocessing. The subject of plutonium in fast reactors is addressed. Safeguards and weapons proliferation are discussed

  10. Nuclear power

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    The Single Channel Trip System for the Dungeness B AGRs in the United Kingdom has enabled Nuclear Electric to enhance the performance of each of the twin reactors progressively towards the design figure of 660MW. The unique self-testing dynamic nature of the microprocessor-based ISAT system was one of the key factors in satisfying the UK Regulator that the system met the demanding requirements of the Dungeness B application, and current operational and maintenance experience is very encouraging. Systems based on the ISAT principle have application in reactor protection systems throughout the world. (Author)

  11. Nuclear stethoscope

    Energy Technology Data Exchange (ETDEWEB)

    Inagaki, Yoshiaki; Saito, Toshihiro; Shimizu, Masahiko (Chiba Univ. (Japan). School of Medicine)

    1983-06-01

    The nuclear stethoscope consisting of radiocardiography and data processing by a microcomputer was introduced with respect to its outline, reliability and clinical application. Ejection fractions (EF) obtained by this device showed a satisfactory correlation with values obtained by the cardiac pool multigate (MUGA) method using a scinticamera and minicomputer, with a slight tendency to overestimation. They showed a good correlation with left ventriculography, accompanied by a slight tendency to underestimation. The reproducibility of this device was also satisfactory. Clinically, EF values during exercise in ischemic heart disease were well correlated with those obtained by the MUGA method. This device permitted real time evaluation of left ventricular function and was highly reliable.

  12. Nuclear stethoscope

    International Nuclear Information System (INIS)

    Inagaki, Yoshiaki; Saito, Toshihiro; Shimizu, Masahiko

    1983-01-01

    The nuclear stethoscope consisting of radiocardiography and data processing by a microcomputer was introduced with respect to its outline, reliability and clinical application. Ejection fractions (EF) obtained by this device showed a satisfactory correlation with values obtained by the cardiac pool multigate (MUGA) method using a scinticamera and minicomputer, with a slight tendency to overestimation. They showed a good correlation with left ventriculography, accompanied by a slight tendency to underestimation. The reproducibility of this device was also satisfactory. Clinically, EF values during exercise in ischemic heart disease were well correlated with those obtained by the MUGA method. This device permitted real time evaluation of left ventricular function and was highly reliable. (Chiba, N.)

  13. Nuclear reactor

    International Nuclear Information System (INIS)

    Rau, P.

    1980-01-01

    The reactor core of nuclear reactors usually is composed of individual elongated fuel elements that may be vertically arranged and through which coolant flows in axial direction, preferably from bottom to top. With their lower end the fuel elements gear in an opening of a lower support grid forming part of the core structure. According to the invention a locking is provided there, part of which is a control element that is movable along the fuel element axis. The corresponding locking element is engaged behind a lateral projection in the opening of the support grid. The invention is particularly suitable for breeder or converter reactors. (orig.) [de

  14. Nuclear sound

    International Nuclear Information System (INIS)

    Wambach, J.

    1991-01-01

    Nuclei, like more familiar mechanical systems, undergo simple vibrational motion. Among these vibrations, sound modes are of particular interest since they reveal important information on the effective interactions among the constituents and, through extrapolation, on the bulk behaviour of nuclear and neutron matter. Sound wave propagation in nuclei shows strong quantum effects familiar from other quantum systems. Microscopic theory suggests that the restoring forces are caused by the complex structure of the many-Fermion wavefunction and, in some cases, have no classical analogue. The damping of the vibrational amplitude is strongly influenced by phase coherence among the particles participating in the motion. (author)

  15. Nuclear decommissioning

    International Nuclear Information System (INIS)

    Lawton, H.

    1987-01-01

    Sufficient work has now been done, on a world-wide basis, to justify confidence that full decommissioning of nuclear installations, both plant and reactors, can be carried out safely and efficiently. Projects in several countries should confirm this in the next few years. In the United Kingdom, good progress has been made with the Windscale Advanced Gas-cooled Reactor and supporting development work is finding solutions to resolve uncertainties. Estimates from several sources suggest that decommissioning costs can be kept to an acceptable level. (author)

  16. Nuclear dualism.

    Science.gov (United States)

    Karrer, Kathleen M

    2012-01-01

    Nuclear dualism is a characteristic feature of the ciliated protozoa. Tetrahymena have two different nuclei in each cell. The larger, polyploid, somatic macronucleus (MAC) is the site of transcriptional activity in the vegetatively growing cell. The smaller, diploid micronucleus (MIC) is transcriptionally inactive in vegetative cells, but is transcriptionally active in mating cells and responsible for the genetic continuity during sexual reproduction. Although the MICs and MACs develop from mitotic products of a common progenitor and reside in a common cytoplasm, they are different from one another in almost every respect. Copyright © 2012 Elsevier Inc. All rights reserved.

  17. Nuclear waste

    International Nuclear Information System (INIS)

    England-Joseph, J.

    1991-03-01

    This paper discusses the Department of Energy's (DOE) procedures for annually assessing the adequacy of the fee that utilities pay for disposal of spent (used) nuclear fuel. In a June 1990 report, it was recommended, among other things, that the Congress authorize DOE to automatically adjust the fee each year on the basis of an inflation index. At that time, DOE also favored fee indexing; however, it subsequently reversed its position. Because of this change, it is now believe that Congress should require DOE to index the fee to the rate of inflation

  18. Nuclear reactor

    International Nuclear Information System (INIS)

    Anthony, A.J.; Gruber, E.A.

    1979-01-01

    A nuclear reactor with control rods in channels between fuel assemblies wherein the fuel assemblies incorporate guide rods which protrude outwardly into the control rod channels to prevent the control rods from engaging the fuel elements. The guide rods also extend back into the fuel assembly such that they are relatively rigid members. The guide rods are tied to the fuel assembly end or support plates and serve as structural members which are supported independently of the fuel element. Fuel element spacing and support means may be attached to the guide rods. 9 claims

  19. Modelo de auxílio à identificação de trabalho escravo ou degradante utilizando lógica fuzzy

    OpenAIRE

    Silva Filho, Benedito de Lima

    2006-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção Esta dissertação apresenta um modelo de auxílio de decisão na identificação de trabalho escravo ou degradante utilizando lógica fuzzy. O mesmo aumenta a transparência nas identificações das condições de trabalho escravo ou degradante, capacitando os agentes do Ministério do Trabalho e Emprego e os profissionais que atuam na área para uma melhor compreensã...

  20. Desarrollo de metodologías analíticas para el estudio del metabolismo del azufre utilizando isótopos estables enriquecidos

    OpenAIRE

    Giner Martínez-Sierra, Justo

    2013-01-01

    La alteración intencionada de la composición isotópica de un elemento dado en un organismo vivo permite obtener información metabólica del elemento. La composición isotópica del azufre varía en la naturaleza por lo que para seguir la pista del azufre en un ser vivo utilizando un trazador marcado isotópicamente, la cantidad de trazador metabólico utilizada debe ser lo suficientemente elevada como para alterar la composición isotópica del azufre por encima de los límites de variabilidad natural...

  1. Optimización de parámetros de deposición de capas delgadas de cobre utilizando diseño de experimentos

    OpenAIRE

    Shirkavand, Nazanin

    2013-01-01

    Una investigación, denominada Optimización de parámetros de deposición de capas delgadas de cobre utilizando diseño de experimentos y desarrollada en el Centro de Investigación en Ciencia e Ingeniería de Materiales (CICIMA), de la Universidad de Costa Rica, tuvo como objetivo poder encontrar la relación de los parámetros del magnetrón (presión, potencia y tiempo) con el grosor de formación de las capas delgadas de cobre. Se utilizó el método estadístico de 2K (donde K es el número de parámetr...

  2. Evaluación de la degradación del plaguicida clorpirifos en muestras de suelo utilizando el hongo Phanerochaete chrysosporium

    Directory of Open Access Journals (Sweden)

    Margarita María Lopera Mesa

    2005-01-01

    Full Text Available Se evaluó la degradación del insecticida clorpirifos en muestras de suelo durante 21 días, utilizando el hongo Phanerochaete chrysosporium. En los ensayos se obtuvieron porcentajes de degradación, en promedio, para las muestras con hongo, de 96,3, 82,4 y 62,2% cuando se trabajaron, respectivamente, con concentraciones iniciales de clorpirifos de 0,95, 5,3 y 9,4 µg/g. Igualmente, los porcentajes de degradación estuvieron acompañados del aumento en la velocidad de degradación, cuando se partió de la concentración inicial de 0,95 µg/g.

  3. Calculos de potenciais de ionização de algumas bases e aza-analogas utilizando o metodo semi-empirico HAM/3

    OpenAIRE

    Jose Jair Vianna Cirino

    1994-01-01

    Resumo: Inicialmente procedeu-se a otimização de geometrias das bases purinas guanina, 8-azaguanjna, xantina, 8-azaxantina e hipoxantina com o uso dos métodos semi-empíricos MNDO, AMI e MNDO-PM3. Nesta etapa também fez-se uso de métodos ab initio utilizando o conjunto de base cep-31G. Os potenciais de ionização dos elétrons do caroço das bases purinas foram calculados posteriormente por meio do método semi-empírico HAM/3 empregando as geometrias otimizadas pelos métodos semi-empíricos na etap...

  4. Segmentação das áreas isquêmicas no acidente vascular cerebral utilizando imagens de tomografia computadorizada de perfusão

    OpenAIRE

    Lilian Contin

    2011-01-01

    As técnicas de processamento digital de imagens têm sido vastamente aplicadas às imagens médicas. Um dos benefícios ocasionado por estas ferramentas é o de prover medidas de parâmetros que são difíceis de estimar e suscetíveis a viés do médico. O presente trabalho teve por objetivo desenvolver um software semi-automático de segmentação das áreas isquêmicas, core e penumbra, no acidente vascular cerebral, utilizando técnicas de segmentação por limiarização e baseada em regiões. Os dois algorit...

  5. Determinação da fragilidade ambiental utilizando técnicas de suporte à decisão e SIG

    OpenAIRE

    Donha,Annelissa G.; Souza,Luiz C. de P.; Sugamosto,Maria L.

    2006-01-01

    O trabalho objetivou determinar a fragilidade ambiental de uma área no município de Pinhais, região metropolitana de Curitiba, utilizando-se a técnica de avaliação por múltiplos critérios, presente no SIG Idrisi 32. Depois de gerados os mapas de classes de declividade, distância a partir dos rios, distância a partir das nascentes, distância a partir da represa, solos e uso atual, foram atribuídos pesos de importância para cada um dos fatores e através de Combinação Linear Ponderada geradas im...

  6. Modelos de distribuição de diâmetros utilizando a função log gama

    Directory of Open Access Journals (Sweden)

    Daniel Henrique Breda Binoti

    2013-03-01

    Full Text Available Objetivou-se neste estudo avaliar a eficiência da função log gama para a descrição da estrutura diamétrica de povoamentos equiâneos, bem como propor um modelo de distribuição diamétrica utilizando esta função. A função foi ajustada a dados de parcelas permanentes de inventário, mensuradas em seis idades. A aderência da função aos dados foi comprovada pelo teste Kolmogorov-Smirnov. A análise gráfica de resíduos não apresentou tendenciosidade para os modelos construídos. A função log gama pode ser utilizada para a construção de modelos de distribuição diamétrica de eucalipto.

  7. CONCEPTUALIZACIÓN Y ANÁLISIS DE UN SISTEMA MULTI-AGENTE PEDAGÓGICO UTILIZANDO LA METODOLOGÍA MAS-COMMONKADS

    Directory of Open Access Journals (Sweden)

    JOVANI ALBERTO JIMÉNEZ BUILES

    2009-01-01

    Full Text Available En este artículo se presentan la conceptualización y el análisis de un sistema multi-agente (MAS pedagógico utilizando la metodología MAS-CommonKADS; la cual es una de las más reconocidaspara el modelado de MAS. El propósito de la fase de conceptualización es comprender el problema, identificar los actores activos y pasivo, además de elaborar los requisitos que permitan formular unos objetivos para generar la solución. En la fase de análisis se definen los modelos de agente, tareas, coordinación, comunicación, organizacióny experiencia (conocimientos. Ambas fases fueron validadas mediante la construcción del ambiente multi agente pedagógico ALLEGRO.

  8. Desenvolvimento de uma aplicação para reconhecer significado de palavras homônimas utilizando redes neurais artificiais

    Directory of Open Access Journals (Sweden)

    Eduardo Gabriel Côrtes

    2016-07-01

    Full Text Available Este trabalho propõe desenvolver uma aplicação para auxiliar no entendimento do significado de palavras ambíguas da língua portuguesa, que dependem necessariamente do contexto para serem identificadas. A aplicação foi implementada na linguagem de programação JAVA, utilizando a IDE NetBeans, juntamente com a ferramenta ADReNA, que permitiu modelar e treinar a rede neural artificial backpropagation. Foram desenvolvidas duas versões da aplicação, que se diferenciam pela forma que representam a camada de entrada da rede neural artificial. Testes realizados mostraram que a forma que a rede neural é representada gera influência em seus resultados. Após a realização dos testes, a aplicação se mostrou promissora no reconhecimento de significados de palavras homônimas.

  9. Contribuição ao desenvolvimento de tecnologia de fabricação de celulas solares utilizando "dopant papers"

    OpenAIRE

    Alexandre Guass Junior

    1995-01-01

    Resumo: Este trabalho teve como objetivo o desenvolvimento de um conjunto de processos de baixo custo para fabricação de células solares. As células solares foram fabricadas utilizando lâminas de silício monocristalino, com orientação cristalografica e resistividade típica de 4.1 à 9.0 ohm.cm, tipo p dopadas com boro. Ajunção n-p foi obtida por difusão usando papéis dopantes. Estes papéis são de dois tipos, os que possuem boro e os com fósforo.A montagem de um conjunto de lâminas de s...

  10. Avaliação de Micro e Pequenas Empresas Utilizando a Metodologia Multicritério e o Método do Fluxo de Caixa Descontado

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Andrade de Lima

    2010-01-01

    Full Text Available Neste artigo é apresentada uma contribuição ao método do fluxo de caixa descontado utilizando a metodologia multicritério de apoio à decisão. Essa metodologia incorpora variáveis de natureza qualitativa e subjetiva ao método tradicional do fluxo de caixa descontado utilizado na avaliação de empresas. Para ilustrar o método proposto foi realizado um estudo descritivo de natureza exploratória aplicado a um multicaso. A intervenção foi em Micro e Pequenas Empresas (MPE do ramo químico, farmacêutico e de turismo. Como resultado, o avaliador ajustou o preço do negócio levando em conta a resultante da mixagem entre as duas metodologias.

  11. Diseño de Herramientas Didácticas Enfocadas al Aprendizaje de Sistemas de Control Utilizando Instrumentación Virtual

    Directory of Open Access Journals (Sweden)

    J. Martínez

    2017-10-01

    Full Text Available Resumen: En este artículo se describe el diseño de tres herramientas didácticas enfocadas al aprendizaje de sistemas de control implementadas en el software de instrumentación virtual LabVIEW. Estas herramientas están dirigidas al análisis de estabilidad en sistemas de control, el diseño de compensadores utilizando la técnica del lugar geométrico de las raíces y el diseño de compensadores utilizando la técnica de respuesta en frecuencia con trazas de Bode. Cada una de estas herramientas didácticas cuenta con una interfaz gráfica amigable con el usuario. La ventaja de estas herramientas didácticas es que incluyen opciones para realizar simulación en las áreas de control que software especializado no tiene. Abstract: This paper describes the design of three didactic tools focused on learning of control systems implemented in LabVIEW virtual instruments software. These tools are dedicated to stability analysis in control systems, compensator design using root locus approach and Bode diagrams in the frequency domain. Each of them has a friendly interface with the user. The advantage of these didactic tools is the several options to simulate some characteristics referent to control in contrast with others teaching tools. Palabras clave: Estabilidad, Simulación de Sistemas, Educación en Control, Laboratorio Virtual, Keywords: Stability, simulation systems, control education, virtual laboratory

  12. Modelo experimental estável de aneurisma sacular em artéria carótida de suínos utilizando veia jugular interna

    Directory of Open Access Journals (Sweden)

    Severino Lourenço da Silva Júnior

    Full Text Available OBJETIVO: Desenvolver um modelo experimental estável de aneurisma sacular em carótida de suínos utilizando veia jugular interna. MÉTODOS: Em 12 suínos sadios, com peso variando entre 25 e 50kg, cinco machos e sete fêmeas, foi confeccionado aneurisma na artéria carótida comum direita. Após arteriotomia elíptica, foi realizada anastomose terminolateral com coto distal de veia jugular interna. O volume do aneurisma era calculado de maneira que o valor não excedesse em 27 vezes o valor da área da arteriotomia. Após seis dias, era realizada angiografia e análise microscópica do aneurisma para avaliar perviedade e trombose parcial ou total. RESULTADOS: Houve ganho de peso significante dos suínos no intervalo de tempo entre a confecção do aneurisma e a angiografia (p = 0,04. Foi observada perviedade aneurismática em dez suínos (83%. Ocorreram infecções de feridas operatórias em dois animais (16,6%, ambas com início de aparecimento em três dias após a confecção do aneurisma. Análise histológica dos aneurismas mostrou trombos ocluindo parcialmente a luz em nove suínos (75%. Nesses animais, observou-se que, em média, 9% da luz aneurismática estava preenchida por trombos. CONCLUSÃO: Pôde ser desenvolvido um modelo experimental estável de aneurisma sacular em carótida de suínos utilizando veia jugular interna.

  13. Nuclear cardiology

    International Nuclear Information System (INIS)

    Vos, P.H.

    1982-01-01

    This thesis deals with two topics in nuclear cardiology. In the first, left ventricular wall motion assessment using Fourier transform of local left ventricular time-activity curves in gated blood pool studies is evaluated. In the second, the interpretation of myocardial perfusion scintigrams is assessed which are obtained with thallium-201 or with another radiopharmaceutical with different physical, but identical biological properties. In all these investigations data acquisition and analysis by computer played an essential role. In chapter 1 the desirable properties of a nuclear medicine computer system are given and the computer system used for this work is described. Wall motion analysis of the left ventricle using Fourier transform of local time-activity curves in the left ventricular region in gated blood pool studies is described in chapter 2. In chapter 3 detection of non-perfused lesions in myocardial perfusion scintigraphy with thallium-201 is described. Detection of partly perfused lesions and the influence of scatter and photon energy on myocardial perfusion scintigraphy is described in chapter 4. (Auth.)

  14. Nuclear reactors

    International Nuclear Information System (INIS)

    Pearson, K.G.

    1977-01-01

    Reference is made to auxiliary means of cooling the nuclear fuel clusters used in light or heavy water cooled nuclear reactors. One method is to provide one or more spray cooling tubes. From holes in the side walls of those tubes coolant water may be sprayed laterally into the cluster against the rods. The flow of main coolant may thus be supplemented or even replaced by the auxiliary coolant. A difficulty, however, is that only those fuel rods close to a spray cooling tube can readily be reached by the auxiliary coolant. In the arrangement described, where the fuel rods are spaced apart by transverse grids, at least one of the interspaces between the grids is provided with an axially extending auxiliary coolant conduit having lateral holes through which an auxiliary coolant is sprayed into the cluster. A deflector is provided that extends from a transverse grid into a position in front of the holes and deflects auxiliary coolant on to parts of the fuel rods otherwise inaccessible to the auxiliary coolant. The construction of the deflector is described. (U.K.)

  15. Nuclear reactors

    International Nuclear Information System (INIS)

    Matheson, J.E.

    1983-01-01

    A nuclear reactor has an upper and a lower grid plate. Protrusions project from the upper grid plate. Fuel assemblies having end fittings fit between the grid plates. An arrangement is provided for accepting axial forces generated during the operation of the nuclear reactor by the flow of the cooling medium and thermal expansion and irradiation-induced growth of the fuel assembly, which comprises rods. Each fuel assembly rests on the lower grid plate and its upper end is elastically supported against the upper grid plate by the above-mentioned arrangement. The arrangement comprises four (for example) torsion springs each having a torsion tube and a torsion bar nested within the torsion tube and connected at one end thereto. The other end of the torsion bar is connected to an associated one of four lever arms. The torsion tube is rigidly connected to the other end fitting and the springs are disposed such that the lever arms are biassed against the protrusions. (author)

  16. Vitrificação de ovócitos imaturos de bovinos utilizando etilenoglicol associado à trehalose e polivinilpirrolidona Vitrification of immature bovine oocytes, by the ethylene glycol associated with trehalose and polivinylpyrrolidone

    Directory of Open Access Journals (Sweden)

    M.R. Souza

    2003-10-01

    Full Text Available Avaliaram-se os efeitos da vitrificação de ovócitos imaturos de bovinos utilizando o etilenoglicol (EG associado à trehalose e à polivinilpirrolidona (PVP. Utilizaram-se ovócitos provenientes de ovários de vacas abatidas em matadouro, distribuídos aleatoriamente em três tratamentos (T. TI - ovócitos não desnudados e não congelados, TII - ovócitos vitrificados com cumulus oophorus e TIII - ovócitos desnudados vitrificados. A percentagem de ovócitos recuperados e ovócitos com morfologia normal após a vitrificação foi diferente entre TII e TIII (92,2 e 72,6%; 79,0 e 63,6%, respectivamente. Os ovócitos normais foram cultivados à 38,5ºC em atmosfera de 5% de CO2 por 24 horas. Após o cultivo, os ovócitos foram fecundados e os embriões cultivados in vitro por sete dias. Foram encontradas diferenças entre tratamentos quanto às taxas de maturação nuclear, fecundação e clivagem (83,9, 70,0 e 44,0%; 17,5, 23,7 e 5,1%; 0,0, 0,0 e 0,0% para os tratamentos I, II e III, respectivamente. Apenas no TI foram obtidas mórulas e blastocistos (21,4%. Os procedimentos de vitrificação, segundo os protocolos utilizados, não são indicados para a criopreservação de ovócitos imaturos de bovinos.This study aimed to evaluate the effects of vitrification procedure of immature bovine oocytes using ethylene glycol (EG associated with trehalose and polivinylpyrrolidone on the percentage of recovered oocytes with normal morphology and nuclear maturation, fecundation and cleavage rates for in vitro cultivated embryos. Ovary oocytes of slaughtered cows were randomly allotted to three treatments (T: TI - oocytes neither undenuded nor vitrified, TII - vitrified oocytes with cumulus oophorus, TIII - undenuded vitrified oocytes. The percentage of recovered oocytes and oocytes with normal morphology after vitrification was different for TII and TIII (92.2 and 72.6%, 79.0 and 63.3% for TII and TIII, respectively. All normal oocytes were cultivated

  17. Efficacy of nuclear forensics

    International Nuclear Information System (INIS)

    Kazi, Reshmi

    2011-01-01

    In a strange turn of history, the threat of global nuclear war has gone down, but the risk of a nuclear attack has gone up. The danger of nuclear terrorism and ways to thwart it, tackle it and manage it in the event of an attack is increasingly gaining the attention of nuclear analysts all over the world. There is rising awareness among nuclear experts to develop mechanisms to prevent, deter and deal with the threat of nuclear terrorism. Nuclear specialists are seeking to develop and improve the science of nuclear forensics so as to provide faster analysis during a crisis. Nuclear forensics can play an important role in detecting illicit nuclear materials to counter trafficking in nuclear and radiological materials. An effective nuclear forensic and attribution strategy can enable policy makers, decision makers and technical managers to respond to situations involving interception of special nuclear materials

  18. On China's Nuclear Doctrine

    Directory of Open Access Journals (Sweden)

    Xia Liping

    2015-12-01

    Full Text Available Nuclear weapons have played an important role in China's national strategy. China’s nuclear doctrine has a very strong continuity. Nevertheless, China has made readjustments in its nuclear doctrine according to the changes of its internal and external situation and its general strategic threat perception. China’s nuclear doctrine has experienced a process of evolution from anti-nuclear blackmail to minimum deterrence. There are five major parts in China's nuclear doctrine: policy of declaration, nuclear development, nuclear deployment, nuclear employment, and nuclear disarmament. Because China is faced with a different situation from other nuclear powers and has its own strategic culture, China has a nuclear doctrine with its own characteristics. China’s nuclear doctrine has been affiliated with and has served the national development strategy, national security strategy, national defense policy and military strategy of China.

  19. Reconversion of nuclear weapons

    CERN Document Server

    Kapitza, Sergei P

    1992-01-01

    The nuclear predicament or nuclear option. Synopsis of three lectures : 1- The physical basis of nuclear technology. Physics of fission. Chain reaction in reactors and weapons. Fission fragments. Separration of isotopes. Radiochemistry.2- Nuclear reactors with slow and fast neutrons. Power, size, fuel and waste. Plutonium production. Dose rate, shielding and health hazard. The lessons of Chernobyl3- Nuclear weapons. Types, energy, blast and fallout. Fusion and hydrogen bombs. What to do with nuclear weapons when you cannot use them? Testing. Nonmilittary use. Can we get rid of the nuclear weapon? Nuclear proliferation. Is there a nuclear future?

  20. Tratamento de resíduo líquido de laticínios utilizando Caixas de Gordura e Reator Anaeróbio Compartimentado seguido de Leitos Cultivados

    Directory of Open Access Journals (Sweden)

    Ana Cristina Ferreira Moreira da Silva

    2014-10-01

    Full Text Available Neste trabalho foram avaliados o desempenho e a eficiência de um sistema de tratamento de resíduos líquidos de laticínios na remoção da carga orgânica do resíduo em uma indústria de laticínios, utilizando um sistema composto por caixas de gordura, reator anaeróbio compartimentado e leitos cultivados de fluxo subsuperficial vegetado com Typha sp. e utilizando como meio suporte brita #1, sob diferentes tempos de detenção hidráulica (3 e 5 dias nos leitos cultivados. Como média geral na remoção de DBO e de DQO, o tratamento utilizando tempo de detenção de 3 dias conseguiu remover 98,87% de DBO e  99,77% de DQO, enquanto o tratamento utilizando 5 dias de detenção hidráulica removeu, em média, 99,51% de DBO e 99,56% de DQO. Os resultados indicam que o sistema foi eficiente no tratamento de resíduos líquidos de laticínios.

  1. Modelo predictivo de la variación de los niveles de contaminación en función del tráfico urbano utilizando herramientas de Inteligencia Artificial

    OpenAIRE

    Aguilar Calvo, Federico

    2017-01-01

    Elaboración de un modelo predictivo de los niveles de contaminación, con el fin de identificar aquellas situaciones en las que el tráfico va a provocar que se superen determinados límites de contaminantes. El modelo se creará utilizando herramientas de Inteligencia Artificial.

  2. Nuclear power in Asia

    Energy Technology Data Exchange (ETDEWEB)

    Hagen, Ronald E.

    1998-08-01

    Contains Executive Summary and Chapters on: Nuclear Energy in the Asian context; Types of nuclear power reactors used in Asia; A survey of nuclear power by country; The economics of nuclear power; Fuels, fuel cycles and reprocessing; Environmental issues and waste disposal; The weapons issues and nuclear power; Conclusions. (Author)

  3. Fundamentals of nuclear physics

    International Nuclear Information System (INIS)

    Jelley, N.A.

    1990-01-01

    The book is aimed at undergraduates in their final year, to give the student a thorough understanding of the principal features of nuclei, nuclear decays and nuclear reactions. Several models are described and used to explain nuclear properties with many illustrative examples. Sections follow on α-, β- and γ-decay, fission, thermonuclear fusion, reactions, nuclear forces and nuclear collective motion. (author)

  4. Nuclear energy basic knowledge

    International Nuclear Information System (INIS)

    Volkmer, Martin

    2013-11-01

    The following topics are dealt with: Atoms, nuclear decays and radioactivity, energy, nuclear fission and the chain reaction, controlled nuclear fission, nuclear power plants, safety installations in nuclear power plants, fuel supply and disposal, radiation measurement and radiation exposition of man. (HSI)

  5. The nuclear dilemma

    International Nuclear Information System (INIS)

    Mason, Colin.

    1983-01-01

    This paper discusses nuclear war, disarmament and national defence policies. The author argues that in spite of the obvious advantages of nuclear power in many parts of the world, the world cannot afford the risk of continuing with it because of the demonstrated close and deadly association of nuclear power and nuclear reactors with nuclear weapons

  6. Nuclear energy data

    International Nuclear Information System (INIS)

    1990-01-01

    Nuclear Energy Data is the OECD Nuclear Energy Agency's annual compilation of basic statistics on electricity generation and nuclear power in OECD countries. The reader will find quick and easy reference to the present status of and projected trends in total electricity generating capacity, nuclear generating capacity, and actual electricity production as well as on supply and demand for nuclear fuel cycle services [fr

  7. Nuclear safety and nuclear insurance

    International Nuclear Information System (INIS)

    Abramovitz, A.

    1983-01-01

    To an extent, public opinion is against Koeberg, inspite of the fact that Escom, Koeberg's prospective licensee, are liable for damages caused in the event of an accident, that they carry public liability insurance bought in the market place to the maximum of ten million rand, and if that is not enough the government will take over responsibility for the rest. A question is put that if this kind of protection carries on, won't there always be a minority of the public who will find nuclear power socially, psychologically and politically unacceptable

  8. Nuclear war nuclear proliferation and their consequences

    International Nuclear Information System (INIS)

    Aga Khan, Sadruddin

    1986-01-01

    The paper concerns the proceedings of a conference hosted by the Groupe de Bellerive to explore and discuss the implications for humanity of nuclear war, nuclear proliferation and their consequences, Geneva 1985. The conference was divided into five sessions, headed by the subject titles: the nuclear non-proliferation treaty (NPT) and its future, the spread of nuclear weapons among nations, global effects of a nuclear war, the nuclear arms race and arms control, the NPT and its future. Twenty eight papers were presented in the five sessions. (UK)

  9. Nuclear dewatering

    International Nuclear Information System (INIS)

    Anon.

    1989-01-01

    The Sizewell 'B' Nuclear Power Station, the first in a new family of PWR (Pressurised Water Reactor) stations in the UK, is currently under construction on the Suffolk coast. One of the first civil engineering tasks associated with the power station construction was the necessity to lower the water table by 17-18 m over an area of approximately 8 hectares to allow the excavation for the foundations to be carried out in the dry. The way chosen to do this was to construct a diaphragm wall around the site area. This had the least effect on surrounding sites -the Sizewell-A station and various nature reserves and wetlands. The reasons for the choice of method are discussed. Following the construction of the wall the water was pumped out from within the diaphragm wall in January 1988. (author)

  10. Nuclear prophecy

    International Nuclear Information System (INIS)

    Michaelis, A.R.

    1981-01-01

    It is shown that there are at least four instances known of reasonably accurate forecasts of the benefits and dangers of nuclear energy. H.G. Wells' atomic bomb of 1914, A.W. Stewart's chain reaction of 1923, Olaf Stapeldon's mushroom cloud of 1930 and Hans Dominik's tactical atomic weapon of 1927 are briefly reviewed as well as a forecast of the Three Mile island accident. These examples show that although the trained imagination of writers can approach the truth none can claim accuracy in predicting the facts. Where they do approach the truth is in the prediction of the consequences of the discoveries, social as well as military, of unlimited energy and of unlimited disasters. (U.K.)

  11. Nuclear waste

    International Nuclear Information System (INIS)

    1989-10-01

    The Department of Energy is awarding grants to the state of Nevada for the state's participation in DOE's program to investigate Yucca Mountain as a possible site for the disposal of civilian nuclear waste. This report has found that DOE's financial assistance budget request of $15 million for Nevada's fiscal year 1990 was not based on the amount the state requested but rather was derived by increasing Nevada's grant funds from the previous year in proportion to the increase that DOE requested for its own activities at the Nevada site. DOE's evaluations of Nevada's requests are performed too late to be used in DOE's budget formulation process because Nevada has been applying for financial assistance at about the same time that DOE submits its budget request to Congress

  12. Nuclear reactors

    International Nuclear Information System (INIS)

    Prescott, R.F.

    1976-01-01

    A nuclear reactor containment vessel faced internally with a metal liner is provided with thermal insulation for the liner, comprising one or more layers of compressible material such as ceramic fiber, such as would be conventional in an advanced gas-cooled reactor and also a superposed layer of ceramic bricks or tiles in combination with retention means therefor, the retention means (comprising studs projecting from the liner, and bolts or nuts in threaded engagement with the studs) being themselves insulated from the vessel interior so that the coolant temperatures achieved in a High-Temperature Reactor or a Fast Reactor can be tolerated with the vessel. The layer(s) of compressible material is held under a degree of compression either by the ceramic bricks or tiles themselves or by cover plates held on the studs, in which case the bricks or tiles are preferably bedded on a yielding layer (for example of carbon fibers) rather than directly on the cover plates

  13. Nuclear reactors

    Energy Technology Data Exchange (ETDEWEB)

    Prescott, R F; George, B V; Baglin, C J

    1978-05-10

    Reference is made to thermal insulation on the inner surfaces of containment vessels of fluid cooled nuclear reactors and particularly in situations where the thermal insulation must also serve a structural function and transmit substantial load forces to the surface which it covers. An arrangement is described that meets this requirement and also provides for core support means that favourably influences the flow of hot coolant from the lower end of the core into a plenum space in the hearth of the reactor. The arrangement comprises a course of thermally insulating bricks arranged as a mosaic covering a wall of the reactor and a course of thermally insulating tiles arranged as a mosaic covering the course of bricks. Full constructional details are given.

  14. Nuclear energy

    International Nuclear Information System (INIS)

    Anon.

    1994-01-01

    The Administrative Court of Braunschweig judges the Ordinance on Advance Funding of Repositories (EndlagervorausleistungsVO) to be void. The Hannover Regional Court passes a basic judgment concerning the Gorleben salt mine (repository) and an action for damages. The Federal Administrative Court dismisses actions against part-permits for the Hanau fuel element fabrication plant. The Koblenz Higher Administrative Court dismisses actions against a part-permit for the Muelheim-Kaerlich reactor. 31st Amendment of the German Criminal Code passed, involving amendments in environmental criminal code, defined in the 2nd amendment to the Act on Unlowful Practices Causing Damage to the Environment (UKG); here: Amendments to the law relating to the criminal code and penal provisions governing unlawful conduct in the operation of nuclear installations. (orig.) [de

  15. Nuclear waste

    International Nuclear Information System (INIS)

    1989-01-01

    This paper reviews the Department of Energy's management of underground single-shell waste storage tanks at its Hanford, Washington, site. The tanks contain highly radioactive and nonradioactive hazardous liquid and solid wastes from nuclear materials production. Hundreds of thousands of gallons of these wastes have leaked, contaminating the soil, and a small amount of leaked waste has reached the groundwater. DOE does not collect sufficient data to adequately trace the migration of the leaks through the soil, and studies predicting the eventual environmental impact of tank leaks do not provide convincing support for DOE's conclusion that the impact will be low or nonexistent. DOE can do more to minimize the environmental risks associated with leaks. To reduce the environmental impact of past leaks, DOE may be able to install better ground covering over the tanks to reduce the volume of precipitation that drains through the soil and carries contaminants toward groundwater

  16. Nuclear facilities

    International Nuclear Information System (INIS)

    Anon.

    2000-01-01

    Here is given the decree (2000-1065) of the 25. of October 2000 reporting the publication of the convention between the Government of the French Republic and the CERN concerning the safety of the LHC (Large Hadron Collider) and the SPS (Proton Supersynchrotron) facilities, signed in Geneva on July 11, 2000. By this convention, the CERN undertakes to ensure the safety of the LHC and SPS facilities and those of the operations of the LEP decommissioning. The French legislation and regulations on basic nuclear facilities (concerning more particularly the protection against ionizing radiations, the protection of the environment and the safety of facilities) and those which could be decided later on apply to the LHC, SPS and auxiliary facilities. (O.M.)

  17. Nuclear reactors

    International Nuclear Information System (INIS)

    Prescott, R.F.; George, B.V.; Baglin, C.J.

    1978-01-01

    Reference is made to thermal insulation on the inner surfaces of containment vessels of fluid cooled nuclear reactors and particularly in situations where the thermal insulation must also serve a structural function and transmit substantial load forces to the surface which it covers. An arrangement is described that meets this requirement and also provides for core support means that favourably influences the flow of hot coolant from the lower end of the core into a plenum space in the hearth of the reactor. The arrangement comprises a course of thermally insulating bricks arranged as a mosaic covering a wall of the reactor and a course of thermally insulating tiles arranged as a mosaic covering the course of bricks. Full constructional details are given. (UK)

  18. Nuclear reactor

    International Nuclear Information System (INIS)

    Gibbons, J.F.; McLaughlin, D.J.

    1978-01-01

    In the pressure vessel of the water-cooled nuclear reactor there is provided an internal flange on which the one- or two-part core barrel is hanging by means of an external flange. A cylinder is extending from the reactor vessel closure downwards to a seat on the core cupport structure and serves as compression element for the transmission of the clamping load from the closure head to the core barrel (upper guide structure). With the core barrel, subject to tensile stress, between the vessel internal flange and its seat on one hand and the compression of the cylinder resp. hold-down element between the closure head and the seat on the other a very strong, elastic sprung structure is obtained. (DG) [de

  19. Nuclear reactor

    International Nuclear Information System (INIS)

    Miyashita, Akio.

    1981-01-01

    Purpose: To facilitate and accelerate a leakage test of valves of a main steam pipe by adding a leakage test partition valve thereto. Constitution: A leakage testing partition valve is provided between a pressure vessel for a nuclear reactor and the most upstream side valve of a plurality of valves to be tested for leakage, a testing branch pipe is communicated with the downstream side of the partition valve, and the testing water for preventing leakage is introduced thereto through the branch pipe. Since main steam pipe can be simply isolated by closing the partition valve in the leakage test, the leakage test can be conducted without raising or lowering the water level in the pressure vessel, and since interference with other work in the reactor can be eliminated, the leakage test can be readily conducted parallel with other work in the reactor in a short time. Clean water can be used without using reactor water as the test water. (Yoshihara, H.)

  20. Nuclear reactor

    International Nuclear Information System (INIS)

    Aleite, W.; Bock, H.W.; Struensee, S.

    1976-01-01

    The invention concerns the use of burnable poisons in a nuclear reactor, especially in PWRs, in order to improve the controllability of the reactor. An unsymmetrical arrangement in the lattice is provided, if necessary also by insertion of special rods for these additions. It is proposed to arrange the burnable poisons in fuel elements taken over from a previous burn-up cycle and to distribute them, going out from the side facing the control rods, over not more than 20% of the lenth of the fuel elements. It seems sufficient, for the burnable poisons to bind an initial reactivity of only 0.1% and to become ineffective after normal operation of 3 to 4 months. (ORU) [de

  1. Nuclear reactor

    International Nuclear Information System (INIS)

    Schweiger, F.; Glahe, E.

    1976-01-01

    In a nuclear reactor of the kind which is charged with spherical reaction elements and in which control rods are arranged to be thrust directly into the charge, each control rod has at least one screw thread on its external surface so that as the rod is thrust into the charge it is caused to rotate and thus make penetration easier. The length of each control rod may have two distinct portions, a latter portion which carries a screw thread and a lead-in portion which is shorter than the latter portion and which may carry a thread of greater pitch than that on the latter portion or may have a number of axially extending ribs instead of a thread

  2. Nuclear cardiology

    Energy Technology Data Exchange (ETDEWEB)

    Cuaron, A

    1993-12-31

    Today, nuclear medicine techniques are routinely used in cardiological practice. They include procedures for the atraumatic investigation of different physiological processes in the various structures included in the central circulation: pericardium, myocardium, myocardial adrenergic innervation, cardiac chambers and valves, coronary microcirculation, and great vessels. Beside these in-Vivo procedures, they also comprise of in-Vitro methods for the detection and measurement in blood of various biological molecules of significance in the management of cardiac diseases. A common feature in this collection of in-Vivo and in-Vitro techniques is their ability to provide helpful clinical information for the diagnosis, prognosis and management of cardiac diseases. Their simplicity and safety for the patient allow their repeated use in the follow up of the progress of disease and in the assessment of the efficacy of the therapeutic measures 15 figs, 14 tabs

  3. NUCLEAR REACTOR

    Science.gov (United States)

    Miller, H.I.; Smith, R.C.

    1958-01-21

    This patent relates to nuclear reactors of the type which use a liquid fuel, such as a solution of uranyl sulfate in ordinary water which acts as the moderator. The reactor is comprised of a spherical vessel having a diameter of about 12 inches substantially surrounded by a reflector of beryllium oxide. Conventionnl control rods and safety rods are operated in slots in the reflector outside the vessel to control the operation of the reactor. An additional means for increasing the safety factor of the reactor by raising the ratio of delayed neutrons to prompt neutrons, is provided and consists of a soluble sulfate salt of beryllium dissolved in the liquid fuel in the proper proportion to obtain the result desired.

  4. Nuclear cardiology

    International Nuclear Information System (INIS)

    Cuaron, A.

    1992-01-01

    Today, nuclear medicine techniques are routinely used in cardiological practice. They include procedures for the atraumatic investigation of different physiological processes in the various structures included in the central circulation: pericardium, myocardium, myocardial adrenergic innervation, cardiac chambers and valves, coronary microcirculation, and great vessels. Beside these in-Vivo procedures, they also comprise of in-Vitro methods for the detection and measurement in blood of various biological molecules of significance in the management of cardiac diseases. A common feature in this collection of in-Vivo and in-Vitro techniques is their ability to provide helpful clinical information for the diagnosis, prognosis and management of cardiac diseases. Their simplicity and safety for the patient allow their repeated use in the follow up of the progress of disease and in the assessment of the efficacy of the therapeutic measures

  5. Nuclear waste

    International Nuclear Information System (INIS)

    1988-01-01

    As required by the Nuclear Waste Policy Act of 1982, the Department of Energy is to annually determine whether the waste disposal fee will produce sufficient revenues to offset the total estimated costs of the waste disposal program. In its June 1987 assessment, DOE recommended that the fee remain unchanged even though its analysis showed that at an inflation rate of 4 percent the current fee would result in end-of-program deficits ranging from $21 billion to $76 billion in 2085. The 1988 assessment calls for reduced total costs because of program changes. Thus, DOE may be able to begin using a realistic inflation rate in determining fee adequacy in 1988 without proposing a major fee increase

  6. Nuclear reactor

    International Nuclear Information System (INIS)

    Tilliette, Z.

    1975-01-01

    A description is given of a nuclear reactor and especially a high-temperature reactor in which provision is made within a pressure vessel for a main cavity containing the reactor core and a series of vertical cylindrical pods arranged in spaced relation around the main cavity and each adapted to communicate with the cavity through two collector ducts or headers for the primary fluid which flows downwards through the reactor core. Each pod contains two superposed steam-generator and circulator sets disposed in substantially symmetrical relation on each side of the hot primary-fluid header which conveys the primary fluid from the reactor cavity to the pod, the circulators of both sets being mounted respectively at the bottom and top ends of the pod

  7. Nuclear waste

    International Nuclear Information System (INIS)

    1990-01-01

    Each year, nuclear power plants, businesses, hospitals, and universities generate more than 1 million cubic feet of hardware, rags, paper, liquid waste, and protective clothing that have been contaminated with radioactivity. While most of this waste has been disposed of in facilities in Nevada, South Carolina, and Washington state, recent legislation made the states responsible - either individually, or through groups of states called compacts - for developing new disposal facilities. This paper discusses the states' progress and problems in meeting facility development milestones in the law, federal and state efforts to resolve issues related to mixed waste (low-level waste that also contains hazardous chemicals) and waste with very low levels of radioactivity, and the Department of Energy's progress in discharging the federal government's responsibility under the law to manage the most hazardous low-level waste

  8. Nuclear insurance

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    The German Nuclear Power Plant Insurance (DKVG) Association was able to increase its net capacity in property insurance to 637 million marks in 1993 (1992: 589 million). The reinsurance capacity of the other pools included, the total amount covered now amounts to 2 billion marks in property incurance and 200 million marks in liability incurance. As in the year before the pool can reckon with a stable gross premium yield around 175 million marks. The revival of the US dollar has played a decisive role in this development. In 1993 in the domestic market, the DKVG offered policies for 22 types of property risk and 43 types to third-party risk, operating with a gross target premium of 65 million marks and 16 million marks, respectively. The DKVG also participated in 540 foreign insurance contracts. (orig./HSCH) [de

  9. Nuclear fuels

    International Nuclear Information System (INIS)

    Beauvy, M.; Berthoud, G.; Defranceschi, M.; Ducros, G.; Guerin, Y.; Limoge, Y.; Madic, Ch.; Santarini, G.; Seiler, J.M.; Sollogoub, P.; Vernaz, E.; Guillet, J.L.; Ballagny, A.; Bechade, J.L.; Bonin, B.; Brachet, J.Ch.; Delpech, M.; Dubois, S.; Ferry, C.; Freyss, M.; Gilbon, D.; Grouiller, J.P.; Iracane, D.; Lansiart, S.; Lemoine, P.; Lenain, R.; Marsault, Ph.; Michel, B.; Noirot, J.; Parrat, D.; Pelletier, M.; Perrais, Ch.; Phelip, M.; Pillon, S.; Poinssot, Ch.; Vallory, J.; Valot, C.; Pradel, Ph.; Bonin, B.; Bouquin, B.; Dozol, M.; Lecomte, M.; Vallee, A.; Bazile, F.; Parisot, J.F.; Finot, P.; Roberts, J.F.

    2009-01-01

    Fuel is one of the essential components in a reactor. It is within that fuel that nuclear reactions take place, i.e. fission of heavy atoms, uranium and plutonium. Fuel is at the core of the reactor, but equally at the core of the nuclear system as a whole. Fuel design and properties influence reactor behavior, performance, and safety. Even though it only accounts for a small part of the cost per kilowatt-hour of power provided by current nuclear power plants, good utilization of fuel is a major economic issue. Major advances have yet to be achieved, to ensure longer in-reactor dwell-time, thus enabling fuel to yield more energy; and improve ruggedness. Aside from economics, and safety, such strategic issues as use of plutonium, conservation of resources, and nuclear waste management have to be addressed, and true technological challenges arise. This Monograph surveys current knowledge regarding in-reactor behavior, operating limits, and avenues for R and D. It also provides illustrations of ongoing research work, setting out a few noteworthy results recently achieved. Content: 1 - Introduction; 2 - Water reactor fuel: What are the features of water reactor fuel? 9 (What is the purpose of a nuclear fuel?, Ceramic fuel, Fuel rods, PWR fuel assemblies, BWR fuel assemblies); Fabrication of water reactor fuels (Fabrication of UO 2 pellets, Fabrication of MOX (mixed uranium-plutonium oxide) pellets, Fabrication of claddings); In-reactor behavior of UO 2 and MOX fuels (Irradiation conditions during nominal operation, Heat generation, and removal, The processes involved at the start of irradiation, Fission gas behavior, Microstructural changes); Water reactor fuel behavior in loss of tightness conditions (Cladding, the first containment barrier, Causes of failure, Consequences of a failure); Microscopic morphology of fuel ceramic and its evolution under irradiation; Migration and localization of fission products in UOX and MOX matrices (The ceramic under irradiation

  10. Nuclear fuels

    Energy Technology Data Exchange (ETDEWEB)

    Beauvy, M.; Berthoud, G.; Defranceschi, M.; Ducros, G.; Guerin, Y.; Limoge, Y.; Madic, Ch.; Santarini, G.; Seiler, J.M.; Sollogoub, P.; Vernaz, E.; Guillet, J.L.; Ballagny, A.; Bechade, J.L.; Bonin, B.; Brachet, J.Ch.; Delpech, M.; Dubois, S.; Ferry, C.; Freyss, M.; Gilbon, D.; Grouiller, J.P.; Iracane, D.; Lansiart, S.; Lemoine, P.; Lenain, R.; Marsault, Ph.; Michel, B.; Noirot, J.; Parrat, D.; Pelletier, M.; Perrais, Ch.; Phelip, M.; Pillon, S.; Poinssot, Ch.; Vallory, J.; Valot, C.; Pradel, Ph.; Bonin, B.; Bouquin, B.; Dozol, M.; Lecomte, M.; Vallee, A.; Bazile, F.; Parisot, J.F.; Finot, P.; Roberts, J.F

    2009-07-01

    Fuel is one of the essential components in a reactor. It is within that fuel that nuclear reactions take place, i.e. fission of heavy atoms, uranium and plutonium. Fuel is at the core of the reactor, but equally at the core of the nuclear system as a whole. Fuel design and properties influence reactor behavior, performance, and safety. Even though it only accounts for a small part of the cost per kilowatt-hour of power provided by current nuclear power plants, good utilization of fuel is a major economic issue. Major advances have yet to be achieved, to ensure longer in-reactor dwell-time, thus enabling fuel to yield more energy; and improve ruggedness. Aside from economics, and safety, such strategic issues as use of plutonium, conservation of resources, and nuclear waste management have to be addressed, and true technological challenges arise. This Monograph surveys current knowledge regarding in-reactor behavior, operating limits, and avenues for R and D. It also provides illustrations of ongoing research work, setting out a few noteworthy results recently achieved. Content: 1 - Introduction; 2 - Water reactor fuel: What are the features of water reactor fuel? 9 (What is the purpose of a nuclear fuel?, Ceramic fuel, Fuel rods, PWR fuel assemblies, BWR fuel assemblies); Fabrication of water reactor fuels (Fabrication of UO{sub 2} pellets, Fabrication of MOX (mixed uranium-plutonium oxide) pellets, Fabrication of claddings); In-reactor behavior of UO{sub 2} and MOX fuels (Irradiation conditions during nominal operation, Heat generation, and removal, The processes involved at the start of irradiation, Fission gas behavior, Microstructural changes); Water reactor fuel behavior in loss of tightness conditions (Cladding, the first containment barrier, Causes of failure, Consequences of a failure); Microscopic morphology of fuel ceramic and its evolution under irradiation; Migration and localization of fission products in UOX and MOX matrices (The ceramic under

  11. Mean nuclear volume

    DEFF Research Database (Denmark)

    Mogensen, O.; Sørensen, Flemming Brandt; Bichel, P.

    1999-01-01

    We evaluated the following nine parameters with respect to their prognostic value in females with endometrial cancer: four stereologic parameters [mean nuclear volume (MNV), nuclear volume fraction, nuclear index and mitotic index], the immunohistochemical expression of cancer antigen (CA125...

  12. Nuclear analytical chemistry

    Energy Technology Data Exchange (ETDEWEB)

    Brune, D.; Forkman, B.; Persson, B.

    1984-01-01

    This book covers the general theories and techniques of nuclear chemical analysis, directed at applications in analytical chemistry, nuclear medicine, radiophysics, agriculture, environmental sciences, geological exploration, industrial process control, etc. The main principles of nuclear physics and nuclear detection on which the analysis is based are briefly outlined. An attempt is made to emphasise the fundamentals of activation analysis, detection and activation methods, as well as their applications. The book provides guidance in analytical chemistry, agriculture, environmental and biomedical sciences, etc. The contents include: the nuclear periodic system; nuclear decay; nuclear reactions; nuclear radiation sources; interaction of radiation with matter; principles of radiation detectors; nuclear electronics; statistical methods and spectral analysis; methods of radiation detection; neutron activation analysis; charged particle activation analysis; photon activation analysis; sample preparation and chemical separation; nuclear chemical analysis in biological and medical research; the use of nuclear chemical analysis in the field of criminology; nuclear chemical analysis in environmental sciences, geology and mineral exploration; and radiation protection.

  13. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... interventions. Children's (pediatric) nuclear medicine refers to imaging examinations done in babies, young children and teenagers. Nuclear ... nuclear medicine procedure work? With ordinary x-ray examinations, an image is made by passing x-rays ...

  14. NATO's Nuclear Glue

    National Research Council Canada - National Science Library

    Horton, Scott T

    2007-01-01

    .... nuclear weapons prepositioned in Europe? This paper reviews the past and current role of US nuclear forces in NATO, considers future nuclear policy options, and discusses potential consequences of those decisions...

  15. Nuclear Heart Scan

    Science.gov (United States)

    ... Home / Nuclear Heart Scan Nuclear Heart Scan Also known as Nuclear Stress Test , ... Learn More Connect With Us Contact Us Directly Policies Privacy Policy Freedom of Information Act (FOIA) Accessibility ...

  16. Nuclear analytical chemistry

    International Nuclear Information System (INIS)

    Brune, D.; Forkman, B.; Persson, B.

    1984-01-01

    This book covers the general theories and techniques of nuclear chemical analysis, directed at applications in analytical chemistry, nuclear medicine, radiophysics, agriculture, environmental sciences, geological exploration, industrial process control, etc. The main principles of nuclear physics and nuclear detection on which the analysis is based are briefly outlined. An attempt is made to emphasise the fundamentals of activation analysis, detection and activation methods, as well as their applications. The book provides guidance in analytical chemistry, agriculture, environmental and biomedical sciences, etc. The contents include: the nuclear periodic system; nuclear decay; nuclear reactions; nuclear radiation sources; interaction of radiation with matter; principles of radiation detectors; nuclear electronics; statistical methods and spectral analysis; methods of radiation detection; neutron activation analysis; charged particle activation analysis; photon activation analysis; sample preparation and chemical separation; nuclear chemical analysis in biological and medical research; the use of nuclear chemical analysis in the field of criminology; nuclear chemical analysis in environmental sciences, geology and mineral exploration; and radiation protection

  17. Nuclear energy in Japan

    International Nuclear Information System (INIS)

    Guillemard, B.

    1978-01-01

    After having described the nuclear partners in Japan, the author analyzes the main aspects of Japan's nuclear energy: nuclear power plants construction program; developping of light water reactors; fuel cycle politics [fr

  18. Themes in nuclear law

    International Nuclear Information System (INIS)

    2003-01-01

    The nuclear law was analyzed during a workshop. The main aspects were: the law of population to access to information on nuclear energy and the relationship between the Regulator Organism and the nuclear power plants managers

  19. Essay about nuclear right

    International Nuclear Information System (INIS)

    Puig, D.

    1994-01-01

    The present essay treat about all Uruguaian Nuclear Energy legislation. Nuclear energy history, international treaties, agreements, national programs, nuclear government politics, radiation protection regulations, wastes, radioactive materials transport, environment and safeguards has been given in this compilation

  20. Prediction of inspection intervals using the Markov analysis; Prediccion de intervalos de inspeccion utilizando analisis de Markov

    Energy Technology Data Exchange (ETDEWEB)

    Rea, R.; Arellano, J. [IIE, Calle Reforma 113, Col. Palmira, Cuernavaca, Morelos (Mexico)]. e-mail: rrea@iie.org.mx

    2005-07-01

    To solve the unmanageable number of states of Markov of systems that have a great number of components, it is intends a modification to the method of Markov, denominated Markov truncated analysis, in which is assumed that it is worthless the dependence among faults of components. With it the number of states is increased in a lineal way (not exponential) with the number of components of the system, simplifying the analysis vastly. As example, the proposed method was applied to the system HPCS of the CLV considering its 18 main components. It thinks about that each component can take three states: operational, with hidden fault and with revealed fault. Additionally, it takes into account the configuration of the system HPCS by means of a block diagram of dependability to estimate their unavailability at level system. The results of the model here proposed are compared with other methods and approaches used to simplify the Markov analysis. It also intends the modification of the intervals of inspection of three components of the system HPCS. This finishes with base in the developed Markov model and in the maximum time allowed by the code ASME (NUREG-1482) to inspect components of systems that are in reservation in nuclear power plants. (Author)

  1. Personnel dosimetry of extremities by using Harshaw rings XD-100 at Centro Regional de Ciencias Nucleares, CRCN, Brazilian CNEN; Dosimetria pessoal de extremidades utilizando aneis Harshaw XD-100 no Centro Regional de Ciencias Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Ricardo de Andrade; Vilela, Eudice; Nogueira, Maria do Socorro; Ferreira Filho, Alfredo Lopes; Castro, Walber Amorim [Centro Regional de Ciencias Nucleares (CRCN), Recife, PE (Brazil)]. E-mail: ral@elogica.com.br

    2000-07-01

    Data concerning calibration and type tests of an extremity system based on XD100 rings (Harshaw) are presented. Dosemeter used is a thermoluminescent chip inserted in a sealed pouch and was read out using a Harshaw 6600 reader. The dosimetric system complied with all ISO/DIS 12794-1 draft report suggested tests, in which this work was based on. This work obtained results point to the applicability of those recommendations to Brazilian institutes and suggest its adoption by the national regulatory commission. (author)

  2. Nuclear experts and nuclear weapons proliferation

    International Nuclear Information System (INIS)

    Mueller, H.

    1979-01-01

    In Germany the issue of nuclear weapons proliferation has attracted scant attention. Most potential nuclear weapon states are important trade partners of the FRG and, since further proliferation of nuclear weapons could worsen conflicts involving these, it should be in the FRG's interest to limit proliferation. The security of the FRG is also dependent on the common interest of the great powers to avoid nuclear war. The contradictory positions of Usa and the USSR on nuclear weapons policy regarding themselves and non-nuclear weapon states encourages less developed countries to see nuclear weaponry as useful. The NPT and IAEA safeguards have only limited inhibiting effect. The nuclear export policy of the FRG has been dominated by short term economic advantage, neglecting the negative long term effects of decreased political stability. The FRG should formulate a policy based on self-restraint, positive stimuli and extension of controls, using its economic strength to deter proliferation. (JIW)

  3. Nuclear reaction data and nuclear reactors

    Energy Technology Data Exchange (ETDEWEB)

    Paver, N [University of Trieste (Italy); Herman, M [International Atomic Energy Agency, Vienna (Austria); Gandini, A [ENEA, Rome (Italy)

    2001-12-15

    These two volumes contain the lecture notes of the workshop 'Nuclear Reaction Data and Nuclear Reactors: Physics, Design and Safety', which was held at the Abdus Salam ICTP in the Spring of 2000. The workshop consisted of five weeks of lecture courses followed by practical computer exercises on nuclear data treatment and design of nuclear power systems. The spectrum of topics is wide enough to timely cover the state-of-the-art and the perspectives of this broad field. The first two weeks were devoted to nuclear reaction models and nuclear data evaluation. Nuclear data processing for applications to reactor calculations was the subject of the third week. On the last two weeks reactor physics and on-going projects in nuclear power generation, waste disposal and safety were presented.

  4. Nuclear Fuel Cycle & Vulnerabilities

    Energy Technology Data Exchange (ETDEWEB)

    Boyer, Brian D. [Los Alamos National Laboratory

    2012-06-18

    The objective of safeguards is the timely detection of diversion of significant quantities of nuclear material from peaceful nuclear activities to the manufacture of nuclear weapons or of other nuclear explosive devices or for purposes unknown, and deterrence of such diversion by the risk of early detection. The safeguards system should be designed to provide credible assurances that there has been no diversion of declared nuclear material and no undeclared nuclear material and activities.

  5. Nuclear energy data 2010

    CERN Document Server

    2010-01-01

    This 2010 edition of Nuclear Energy Data , the OECD Nuclear Energy Agency's annual compilation of official statistics and country reports on nuclear energy, provides key information on plans for new nuclear plant construction, nuclear fuel cycle developments as well as current and projected nuclear generating capacity to 2035 in OECD member countries. This comprehensive overview provides authoritative information for policy makers, experts and other interested stakeholders.

  6. The Iranian nuclear diplomacy

    International Nuclear Information System (INIS)

    Tabatabaei, Seyed Mohammad

    2008-01-01

    While assuming that civil nuclear means progress, and that military nuclear means danger, the author explains why Iran had decided to perform nuclear research and to implement electro-nuclear science, why Iran emphasises its willingness to develop uranium enrichment, what is the Iranian policy in terms of civil nuclear industry, why Iran does not want any shift of its nuclear programme towards military purposes

  7. Nuclear power and nuclear safety 2006

    International Nuclear Information System (INIS)

    Lauritzen, B.; Oelgaard, P.L.; Kampmann, D.; Majborn, B.; Nonboel, E.; Nystrup, P.E.

    2007-04-01

    The report is the fourth report in a series of annual reports on the international development of nuclear power production, with special emphasis on safety issues and nuclear emergency preparedness. The report is written in collaboration between Risoe National Laboratory and the Danish Emergency Management Agency. The report for 2006 covers the following topics: status of nuclear power production, regional trends, reactor development and development of emergency management systems, safety related events of nuclear power, and international relations and conflicts. (LN)

  8. Nuclear Deterrence in a New Nuclear Era

    International Nuclear Information System (INIS)

    Miraillet, Michel

    2010-01-01

    Within an unstable international environment and an unpredictable future, nuclear weapons will continue to play a major role in defense policies. Indeed, since disarmament currently seems an unlikely objective, nuclear weapons remain as a security guarantee. Within this context, talk of the global abolition of nuclear weapons remains essentially rhetorical and the supposed link between disarmament and non-proliferation is a tenuous one. The foremost purpose of both disarmament and nuclear deterrence must be security

  9. Nuclear power and nuclear safety 2004

    International Nuclear Information System (INIS)

    2005-03-01

    The report is the second report in a new series of annual reports on the international development of nuclear power production, with special emphasis on safety issues and nuclear emergency preparedness. The report is written in collaboration between Risoe National Laboratory and the Danish Emergency Management Agency. The report for 2004 covers the following topics: status of nuclear power production, regional trends, reactor development and development of emergency management systems, safety related events of nuclear power and international relations and conflicts. (ln)

  10. Nuclear power and nuclear safety 2005

    International Nuclear Information System (INIS)

    Lauritzen, B.; Oelgaard, P.L.; Kampman, D.; Majborn, B.; Nonboel, E.; Nystrup, P.E.

    2006-03-01

    The report is the third report in a series of annual reports on the international development of nuclear power production, with special emphasis on safety issues and nuclear emergency preparedness. The report is written in collaboration between Risoe National Laboratory and the Danish Emergency Management Agency. The report for 2005 covers the following topics: status of nuclear power production, regional trends, reactor development and development of emergency management systems, safety related events of nuclear power and international relations and conflicts. (ln)

  11. Nuclear power and nuclear safety 2008

    International Nuclear Information System (INIS)

    Lauritzen, B.; Oelgaard, P.L.; Kampmann, D.

    2009-06-01

    The report is the fifth report in a series of annual reports on the international development of nuclear power production, with special emphasis on safety issues and nuclear emergency preparedness. The report is written in collaboration between Risoe DTU and the Danish Emergency Management Agency. The report for 2008 covers the following topics: status of nuclear power production, regional trends, reactor development, safety related events of nuclear power, and international relations and conflicts. (LN)

  12. Nuclear standardization development study

    International Nuclear Information System (INIS)

    Pan Jianjun

    2010-01-01

    Nuclear industry is the important part of national security and national economic development is key area of national new energy supported by government. nuclear standardization is the important force for nuclear industry development, is the fundamental guarantee of nuclear safe production, is the valuable means of China's nuclear industry technology to the world market. Now nuclear standardization faces to the new development opportunity, nuclear standardization should implement strategy in standard system building, foreign standard research, company standard building, and talented people building to meet the requirement of nuclear industry development. (author)

  13. Nuclear safety and regulation

    International Nuclear Information System (INIS)

    Kim, Hho Jung

    2000-03-01

    This book contains 12 chapters, which are atom and radiation, nuclear reactor and kinds of nuclear power plant, safeguard actuation system and stability evaluation for rock foundation of nuclear power plant, nuclear safety and principle, safety analysis and classification of incident, probabilistic safety assessment and major incident, nuclear safety regulation, system of nuclear safety regulation, main function and subject of safety regulation in nuclear facilities, regulation of fuel cycle and a nuclear dump site, protection of radiation and, safety supervision and, safety supervision and measurement of environmental radioactivity.

  14. Nuclear weapons modernizations

    Energy Technology Data Exchange (ETDEWEB)

    Kristensen, Hans M. [Federation of American Scientists, Washington, DC (United States)

    2014-05-09

    This article reviews the nuclear weapons modernization programs underway in the world's nine nuclear weapons states. It concludes that despite significant reductions in overall weapons inventories since the end of the Cold War, the pace of reductions is slowing - four of the nuclear weapons states are even increasing their arsenals, and all the nuclear weapons states are busy modernizing their remaining arsenals in what appears to be a dynamic and counterproductive nuclear competition. The author questions whether perpetual modernization combined with no specific plan for the elimination of nuclear weapons is consistent with the nuclear Non-Proliferation Treaty and concludes that new limits on nuclear modernizations are needed.

  15. [Cyclotron based nuclear science

    International Nuclear Information System (INIS)

    1989-06-01

    This report contains papers on the following topics: Heavy ion reactors, nuclear structure and fundamental interactions; atomic and materials studies; nuclear theory; and superconducting cyclotron and instrumentation

  16. Nuclear energy data 2011

    CERN Document Server

    2011-01-01

     . Nuclear Energy Data, the OECD Nuclear Energy Agency's annual compilation of statistics and country reports on nuclear energy, contains official information provided by OECD member country governments on plans for new nuclear plant construction, nuclear fuel cycle developments as well as current and projected nuclear generating capacity to 2035. For the first time, it includes data for Chile, Estonia, Israel and Slovenia, which recently became OECD members. Key elements of this edition show a 2% increase in nuclear and total electricity production and a 0.5% increase in nuclear generating ca

  17. Sunken nuclear submarines

    International Nuclear Information System (INIS)

    Eriksen, V.O.

    1990-01-01

    The increasing number of accidents with nuclear submarines is a worriment to the general public. Five nuclear submarines are resting on the bottom of the North Atlantic. Design information on nuclear propulsion plants for submarines is classified. The author describes a potential generic nuclear submarine propulsion plant. Design information from the civilian nuclear industry, nuclear power plants, research reactors, nuclear cargo vessels and nuclear propelled icebreakers are used for illustration of relevant problems. A survey is given of nuclear submarines. Factors influencing the accident risks and safety characteristics of nuclear submarines are considered, and potential accident scenarios are described. The fission product content of the nuclear plant can be estimated, '' source terms'' can be guessed and potential release rates can be judged. The mechanisms of dispersion in the oceans is reviewed and compared with the dumping of radioactive waste in the Atlantic and other known releases. 46 refs., 49 figs., 14 tabs

  18. Nuclear energy. Economical aspects

    International Nuclear Information System (INIS)

    Legee, F.

    2010-01-01

    This document present 43 slides of a power point presentation containing detailed data on economical and cost data for nuclear energy and nuclear power plants: evolution from 1971 to 2007 of world total primary energy supply, development of nuclear energy in the world, nuclear power plants in the world in 2009, service life of nuclear power plants and its extension; nuclear energy market and perspectives at 2030, the EPR concept (generation III) and its perspectives at 2030 in the world; cost assessment (power generation cost, nuclear power generation cost, costs due to nuclear safety, comparison of investment costs for gas, coal and nuclear power generation, costs for building a nuclear reactor and general cost; cost for the entire fuel cycle, the case of the closed cycle with recycling (MOX); costs for radioactive waste storage; financial costs and other costs such as environmental impacts, strategic stocks, comparative evaluation of the competitiveness of nuclear versus coal and gas

  19. Nuclear knowledge management

    International Nuclear Information System (INIS)

    2007-01-01

    The management of nuclear knowledge has emerged as a growing challenge in recent years. The need to preserve and transfer nuclear knowledge is compounded by recent trends such as ageing of the nuclear workforce, declining student numbers in nuclear-related fields, and the threat of losing accumulated nuclear knowledge. Addressing these challenges, the IAEA promotes a 'knowledge management culture' through: - Providing guidance for policy formulation and implementation of nuclear knowledge management; - Strengthening the contribution of nuclear knowledge in solving development problems, based on needs and priorities of Member States; - Pooling, analysing and sharing nuclear information to facilitate knowledge creation and its utilization; - Implementing effective knowledge management systems; - Preserving and maintaining nuclear knowledge; - Securing sustainable human resources for the nuclear sector; and - Enhancing nuclear education and training

  20. Development of nuclear energy and nuclear policy in China

    International Nuclear Information System (INIS)

    You Deliang

    1993-11-01

    Status of nuclear power development in China, nuclear policy and nuclear power programme are described. Issues regarding nuclear fuel cycle system, radioactive waste management and international cooperation in the field of peaceful use of nuclear energy are discussed

  1. PRODUCCIÓN DE BIOMASA Y EXOPOLISACÁRIDOS DE Grifóla frondosa BAJO CULTIVO SUMERGIDO UTILIZANDO FUENTES DE CARBONO NO CONVENCIONALES

    Directory of Open Access Journals (Sweden)

    Paula Zapata

    2007-06-01

    Full Text Available Grifóla frondosa es un hongo Basidiomycete comestible y medicinal que produce polisacáridos tipo glucanos (β-1,6 y β-1,3 con actividad antitumoral e inmunomoduladora. Para el presente trabajo, el objetivo fue evaluar la incidencia de diferentes fuentes de carbono (FC en la producción de biomasa y exopolisacári-dos (EPS, bajo condiciones de cultivo sumergido, utilizando un diseño estadístico factorial con dos factores: fuente de carbono (FC(1-7 y medio (MB y MS. La máxima producción de biomasa micelial (21,10 ± 0,82 g/l y la máxima producción de EPS (6,53 ± 0,14 g/l se logró utilizando el medio MB suplementado con FC4. Además de lo anterior, se logró desarrollar un medio de cultivo que cumple con el objetivo de disminuir costos, de Col $18.455 a $656 por litro de medio, produciendo (14,14 ± 0,82 g/l de biomasa y (5,16 ± 0,14 g/l de EPS, utilizando el medio MS suplementando con FC4. Estos resultados abren nuevas alternativas y posibilidades en nuestro país para el desarrollo de productos a partir de esta especie con costos que estén al alcance de la población.Grifóla frondosa is a Basidiomycete fungus edible and medicinal, it produces polysaccharides such a glucans (β-1,6 and β-1,3 with anti-tumor and inmuno-stimulating activity. For this work, the aim was evaluate the incidence of different carbon sources (FC in biomass and exo-polymer (EPS production, under submerged culture conditions, by using a factorial statistical design with two factors: carbon source (FC(1-7 and medium (MB and MS. The maximal yield of mycelial biomass (21,10 ± 0,82 g/l and the maximal yield in EPS (6,53 ± 0,14 g/l was achieved by using the MB medium supplemented with FC4. Besides, it was possible to develop a medium that fulfills the objective of reducing costs from $18.455 to $656 Colombian pesos for each liter of medium used, which produces (14,14 ± 0,82 g/l of biomass and (5,16 ± 0,14 g/l of EPS, using the MS medium supplemented with FC4

  2. Estimativa da área da folha da batateira utilizando medidas lineares Evaluation of the potato plant leaf area using linear measures

    Directory of Open Access Journals (Sweden)

    Marcelo CC Silva

    2008-03-01

    Full Text Available O objetivo deste experimento foi determinar o modelo mais apropriado para estimar a área da folha da batateira, utilizando-se medidas de comprimento e largura da folha. Foram coletadas 300 folhas de 300 plantas de batata, cultivar Monalisa, de forma aleatória, aos 21 e 56 dias após a emergência (DAE. Em laboratório, foram medidos o comprimento (C, a largura (L e a área de cada folha (AF. Os dados foram submetidos à análise de regressão com o valor da AF sendo considerado a variável dependente e os valores de comprimento e largura de folha as variáveis independentes. Foram testados três modelos estatísticos: linear, exponencial e logarítmico. A AF da batateira foi mais precisamente estimada (R² = 0,88, usando as medidas, L e C (AF = 0,2798**LC + 71,267. Para maior rapidez e praticidade, a AF da batateira, foi também apropriadamente estimada medindo-se apenas L ou C da folha e utilizando-se as equações AF = 0,0479**L + 10,777 (R² = 0,83 ou AF = 0,0659**C + 12,979 (R² = 0,82. A área foliar estimada 21 DAE, utilizando o modelo linear foi de 234,41 cm², sendo que o valor real medido, foi de 185,52 cm². Aos 56 DAE, a área foliar estimada pelo mesmo modelo foi de 175,60 cm², o valor real medido, foi de 176,01 cm². Com um dos modelos propostos, a área da folha pode ser estimada em tempo real, de forma rápida e sem a necessidade de coletar a folha.The objective of this experiment was to determine the most appropriate model to estimate potato leaf area through the leaf length and width. 300 leaves of 300 potato plants, cv. Monalisa were collected in an aleatory way, 21 and 56 days after the plant emergence (DAE. In laboratory, the length (C, width (L and area of each leaf (AF were measured. The data were submitted to the regression analysis with the AF value as a dependent variable and the leaf length and width values as the independent variables. Three statistical models were tested (linear, exponential and logarithmic. Potato

  3. Nuclear regulation

    International Nuclear Information System (INIS)

    1990-04-01

    Because of an accidental release in 1986 of low-level waste stored at the Wright-Patterson Air Force Base, Ohio, several individuals inhaled small amounts of a radioactive substance. GAO examined the Nuclear Regulatory Commission's oversight of the Department of Defense's use, handling, and disposal of radioactive material and found that no comprehensive DOD waste disposal program exists and none of the three services knows the full extent of its low-level radioactive waste disposal problems. Throughout the 1980s, the Army and the Air Force had, on occasion, been banned from disposal sites for failing to comply with federal and state requirements. By December 1992, two of the three sites now used by DOD to disposed of waste will close, and only a limited number of new sites may be available for several years. In the interim, DID will pay substantial surcharges to dispose of waste. After January 1993, DOD will have to comply with disposal requirements for as many as 16 sites or store waste on-site pending the availability of new sites. This report discusses how GAO believes DOD needs to take full advantage of the time between now and January 1993 to establish a low-level radioactive waste disposal program. DOD also needs to work with other federal agencies, compacts, and states to determine the feasibility of dedicating a portion of one or more disposal sites for the government's use

  4. Nuclear fusion

    International Nuclear Information System (INIS)

    Huber, H.

    1978-01-01

    A comprehensive survey is presented of the present state of knowledge in nuclear fusion research. In the first part, potential thermonuclear reactions, basic energy balances of the plasma (Lawson criterion), and the main criteria to be observed in the selection of appropriate thermonuclear reactions are dealt with. This is followed by a discussion of the problems encountered in plasma physics (plasma confinement and heating, transport processes, plasma impurities, plasma instabilities and plasma diagnostics) and by a consideration of the materials problems involved, such as material of the first wall, fuel inlet and outlet, magnetic field generation, as well as repair work and in-service inspections. Two main methods have been developed to tackle these problems: reactor concepts using the magnetic pinch (stellarator, Tokamak, High-Beta reactors, mirror machines) on the one hand, and the other concept using the inertial confinement (laser fusion reactor). These two approaches and their specific problems as well as past, present and future fusion experiments are treated in detail. The last part of the work is devoted to safety and environmental aspects of the potential thermonuclear aspects of the potential thermonuclear reactor, discussing such problems as fusion-specific hazards, normal operation and potential hazards, reactor incidents, environmental pollution by thermal effluents, radiological pollution, radioactive wastes and their disposal, and siting problems. (orig./GG) [de

  5. Nuclear security

    International Nuclear Information System (INIS)

    1991-12-01

    This paper reports that despite their crucial importance to national security, safeguards at the Department of Energy's (DOE) weapons facilities may be falling short. DOE security inspections have identified many weaknesses, including poor performance by members of DOE's security force, poor accountability for quantities of nuclear materials, and the inability of personnel to locate documents containing classified information. About 13 percent of the 2,100 identified weakness resulted in DOE inspectors giving out unsatisfactory security ratings; another 38 percent led to marginal ratings. In addition, DOE's centralized safeguards and security information tracking system lacks current data on whether DOE field offices have corrected the identified weaknesses. Without reliable information, DOE has no way of knowing whether timely action was taken to correct problems, nor can it determine whether weaknesses are systematic. DOE has tried to minimize the impact of these security weaknesses at its facilities by establishing multiple layers of protection measures and instituting interim and compensatory measures for identified weaknesses. DOE is planning enhancements to the centralized tracking system that should improve its reliability and increase its effectiveness

  6. Nuclear reactors

    International Nuclear Information System (INIS)

    Prescott, R.F.; George, B.V.; Baglin, C.J.

    1979-01-01

    In a nuclear reactor (e.g. one having coolant down-flow through a core to a hearth below) thermal insulation (e.g. of a floor of the hearth) comprises a layer of bricks and a layer of tiles thereon, with smaller clearances between the tiles than between the bricks but with the bricks being of reduced cross-section immediately adjacent the tiles so as to be surrounded by interconnected passages, of relatively large dimensions, constituting a continuous chamber extending behind the layer of tiles. By this arrangement, lateral coolant flow in the inter-brick clearances is much reduced. The reactor core is preferably formed of hexagonal columns, supported on diamond-shaped plates each supported on a pillar resting on one of the hearth-floor tiles. Each plate has an internal duct, four upper channels connecting the duct with coolant ducts in four core columns supported by the plate, and lower channels connecting the duct to a downwardly-open recess common to three plates, grouped to form a hexagon, at their mutually-adjacent corners. This provides mixing, and temperature-averaging, of coolant from twelve columns

  7. Nuclear standards

    International Nuclear Information System (INIS)

    Fichtner, N.; Becker, K.; Bashir, M.

    1981-01-01

    This compilation of all nuclear standards available to the authors by mid 1980 represents the third, carefully revised edition of a catalogue which was first published in 1975 as EUR 5362. In this third edition several changes have been made. The title has been condensed. The information has again been carefully up-dated, covering all changes regarding status, withdrawal of old standards, new projects, amendments, revisions, splitting of standards into several parts, combination of several standards into one, etc., as available to the authors by mid 1980. The speed with which information travels varies and requires in many cases rather tedious and cumbersome inquiries. Also, the classification scheme has been revised with the goal of better adjustment to changing situations and priorities. Whenever it turned out to be difficult to attribute a standard to a single subject category, multiple listings in all relevant categories have been made. As in previous editions, within the subcategories the standards are arranged by organization (in Categorie 2.1 by country) alphabetically and in ascending numerical order. It covers all relevant areas of power reactors, the fuel cycle, radiation protection, etc., from the basic laws and governmental regulations, regulatory guides, etc., all the way to voluntary industrial standards and codes of pratice. (orig./HP)

  8. Nuclear stethoscope

    International Nuclear Information System (INIS)

    1976-01-01

    A built-up image illustrating heart activity within the cardiac cycle is produced by simultaneously displaying a plurality of memory channels which accumulate respectively the amount of radioactivity detected within a cardiac chamber during successive intervals throughout the cardiac cycle. The parallel lines of a raster scan display correspond respectively to the memory channels. The count stored in a particular memory channel causes the video signal for the corresponding line to be maintained at a binary level for a corresponding time interval thus generating a bar graph in which the length of each bar indicates the amount of radioactivity sensed during the corresponding interval of the cardiac cycle. As each memory channel accumulates radioactivity data with each successive cardiac cycle, each bar displayed in the bar graph lengthens to indicate the cumulative activity until an interpretable curve is obtained. The invention relates generally to the field of nuclear medicine and, more specifically, to diagnostic techniques of analyzing blood flow through the heart by detecting radioactivity from radioisotopes injected into the bloodstream

  9. Nuclear reactors

    International Nuclear Information System (INIS)

    Yoshioka, Michiko.

    1985-01-01

    Purpose: To obtain an optimum structural arrangement of IRM having a satisfactory responsibility to the inoperable state of a nuclear reactor and capable of detecting the reactor power in an averaged manner. Constitution: As the structural arrangement of IRM, from 6 to 16 even number of IRM are bisected into equial number so as to belong two trip systems respectively, in which all of the detectors are arranged at an equal pitch along a circumference of a circle with a radius rl having the center at the position of the central control rod in one trip system, while one detector is disposed near the central control rod and other detectors are arranged substantially at an equal pitch along the circumference of a circle with a radius r2 having the center at the position for the central control rod in another trip system. Furthermore, the radius r1 and r2 are set such that r1 = 0.3 R, r2 = 0.5 R in the case where there are 6 IRM and r1 = 0.4 R and R2 = 0.8 R where there are eight IRM where R represents the radius of the reactor core. (Kawakami, Y.)

  10. Nuclear chemistry

    International Nuclear Information System (INIS)

    Anon.

    1979-01-01

    Topics covered include: mass asymmetry and total kinetic energy release in the spontaneous fission of 262 105; calculation of spontaneous fission properties of very heavy nuclei - 98 less than or equal to Z less than or equal to 106 and 150 less than or equal to N less than or equal to 164; energy losses for 84 Kr ions in nickel, aluminium and titanium; differences in compound nuclei formed with 40 Ar and 84 Kr projectiles; measurement of the energy division vs. mass in highly damped reactions; ambiguities in the inference of precompound emission from excitation function analysis; selective laser one-atom detection of neutral prompt fission fragments; laser induced nuclear polarization - application to the study of spontaneous fission isomers; quadrupole and hexadecapole deformations in the actinide nuclei; high-spin states in 164 Yb; contrasting behavior of h/sub 9/2/ and i/sub 13/2/ bands in 185 Au; multiple band crossings in 164 Er; recoil-distance measurement of lifetimes of rotational states in 164 Dy, lifetimes of ground-band states in 192 Pt and 194 Pt and application of the rotation-alignment model; coulomb excitation of vibrational nuclei with heavy ions; surface structure of deformed nuclei; valency contribution to neutron capture in 32 S; neutron capture cross section of manganese; search for superheavy elements in natural samples by neutron multiplicity counting; and gamma-ray studies on the geochemistry of achondritic meteorites

  11. Nuclear medicine

    International Nuclear Information System (INIS)

    Price, D.C.

    1989-01-01

    The spleen is a sinusoidal vascular filter that is an integral part of the reticuloendothelial system and is the largest single lymphoid organ in the body. Thus it has important scavenging and immunologic functions in humans. It is also a site for normal hematopoiesis in humans during the third to sixth months of gestation. Solenic hematopoiesis does occur normally in adult animals of other species (for instance, mouse, rat, rabbit), but it is seen postnatally in humans only when they have certain hematologic disorders such as myelofibrosis with myeloid metaplasia and severe hemolytic anemias. In its role as a reticuloendothelial organ the adult human spleen serves as a vascular scavenger. Arterial blood filters through a network of arterioles, cords, and sinuses in a closed system that requires the blood cells to be pliable and brings them into intimate contact with macrophages suspended on the reticulin stroma of the cords. Erythrocyte culling and pitting functions as described by Crosby result in a transient retention of immature circulating erythroid cells until residual intracellular nuclear fragments have been extruded. The increased risk for overwhelming infection in children and adults whose spleen have been removed for reasons other than acute trauma would appear to be caused by the loss of both its phagocytic and its immunologic (antibody-producing) contributions to the monitoring of the circulating blood. This paper reports that the ability of the spleen to phagocytose intravascular foreign particles and to recognize and destroy damaged erythrocytes is the basis for the current use of radiopharmaceuticals in spleen scintigraphy

  12. Nuclear decisions

    International Nuclear Information System (INIS)

    Fischhoff, B.

    1991-01-01

    This attempts to identify the role of judgmental processes in various nuclear arms/war decisions. That task analysis is done with some confidence. The next two steps, diagnosing potential weaknesses in those judgments and suggesting ameliorative procedures, are done with increasing timidity. The empirical research base is not (ever) as large as one would like. It is particularly weak with regard to studies of experts forced to go beyond hard data and rely on intuitive judgments within their field of expertise. further evidence is needed to substantiate the claim that experts think like everyone else unless they have had the opportunity to master a particular kind of judgment as a learned skill. Although there is both theoretical and empirical reason to believe that various forms of decision aiding are possible, the high stakes involved mandate caution before proposing any intervention. Ineffective steps may make matters worse if they raise confidence without improving performance, or if they disrupt the cognitive ecology within which decision makers are accustomed to functioning, so that they lose touch with their own imperfect intuitions without acquiring viable alternatives

  13. Nuclear waste

    International Nuclear Information System (INIS)

    1990-07-01

    The state of Nevada opposed DOE's development of a nuclear waste repository at Yucca Mountain. As a result, disputes have arisen over how Nevada has spent financial assistance provided by DOE to pay the state's repository program costs. This report reviews Nevada's use of about $32 million in grant funds provided by DOE through June 1989 and found that Nevada improperly spent about $1 million. Nevada used as much as $683,000 for lobbying and litigation expenses that were unauthorized or were expressly prohibited by law, court decision, or grant terms; exceeded a legislative spending limit on socioeconomic studies by about $96,000; and used, contrary to grant terms, about $275,000 from one grant period to pay expenses incurred in the prior year. Also, Nevada did not always exercise adequate internal controls over grant funds, such as timely liquidation of funds advanced to contractors. A permissive approach to grant administration by DOE contributed to Nevada's inappropriate use of grant funds

  14. Nuclear energy and nuclear technology in Switzerland

    International Nuclear Information System (INIS)

    Graf, P.

    1975-01-01

    The energy crisis, high fuel costs and slow progress in the development of alternative energy sources, e.g. solar energy have given further impetus to nuclear power generation. The Swiss nuclear energy programme is discussed and details are given of nuclear station in operation, under construction, in the project stage and of Swiss participation in foreign nuclear stations. Reference is made to the difficulties, delays and resulting cost increases caused by local and regional opposition to nuclear power stations. The significant contributions made by Swiss industry and Swiss consulting engineers are discussed. (P.G.R.)

  15. Nuclear disarmament and peaceful nuclear technology

    International Nuclear Information System (INIS)

    Taylor, T.B.

    1989-01-01

    According to the author, it remains to be seen whether nuclear disarmament can reduce the risks of nuclear war sufficiently for the residual risks to be acceptable to a majority of the world's population, while at the same time vigorous growth in the world's dependence on nuclear energy for peaceful purposes continues. This paper discusses how use of nuclear materials from dismantled weapons as fuel for peaceful purposes may help progress to be made towards that goal, by stimulating considerable improvements in the effectiveness of arrangements for preventing diversion of the materials from peaceful to military purposes, while at the same time eliminating large numbers of nuclear weapons

  16. Nuclear power and the nuclear fuel cycle

    International Nuclear Information System (INIS)

    Scurr, I.F.; Silver, J.M.

    1990-01-01

    Australian Nuclear Science and Technology Organization maintains an ongoing assessment of the world's nuclear technology developments, as a core activity of its Strategic Plan. This publication reviews the current status of the nuclear power and the nuclear fuel cycle in Australia and around the world. Main issues discussed include: performances and economics of various types of nuclear reactors, uranium resources and requirements, fuel fabrication and technology, radioactive waste management. A brief account of the large international effort to demonstrate the feasibility of fusion power is also given. 11 tabs., ills

  17. PROPOSTA DE MODELO PARA IMPLANTAÇÃO DE PROCESSO DE PROJETO UTILIZANDO O CONCEITO BIM EM ESCRITÓRIOS DE ARQUITETURA

    Directory of Open Access Journals (Sweden)

    Marcele Ariane Lopes Garbini

    2015-02-01

    Full Text Available Este trabalho trata do modelo de processo de projeto utilizando BIM (Building Information Modeling em escritórios de arquitetura. O conceito de BIM surgiu há mais de trinta anos, no entanto vem sendo divulgado com maior abrangência no mercado da construção civil apenas nos últimos dez anos. As vantagens de sua adoção são visíveis nos projetos, considerando o aumento na rapidez do desenvolvimento e na qualidade, dentre outros benefícios. O objetivo desta pesquisa está em propor um modelo de processo de projeto, utilizando o conceito BIM voltado para escritórios de arquitetura, de tal forma que estes possam obter um grau maior de eficiência na sua utilização. Fundamenta-se metodologicamente em estudos de casos múltiplos, interpretados qualitativamente e realizados em escritórios nas cidades de Cuiabá, São Paulo e Goiânia, perfazendo quatro empresas. Na fase de preparação foi elaborado um protocolo de pesquisa com questões para a coleta de dados nos escritórios. A condução dos estudos foi de ordem exploratória, por meio de documentos, entrevistas e observação direta. Nas entrevistas foram obtidos dados de caracterização da empresa e dados sobre o desenvolvimento dos projetos: planejamento para implantação da BIM; tecnologia da informação; processo de projeto e procedimentos de trabalho. Após a validação, foi realizada uma análise comparativa destas informações, onde ficaram claras as mudanças ocorridas nos processos de projeto, nos procedimentos de trabalho e na capacitação da equipe técnica dos escritórios. Dentre os produtos desta pesquisa, destaca-se a proposta de um modelo de processo de projeto que é o objeto do presente artigo. Este modelo se compõe de diretrizes de trabalho e de instrumentos para o desenvolvimento dos projetos nos escritórios de arquitetura que vem, paulatinamente, realizando a migração para os sistemas BIM.

  18. Nuclear power and the nuclear fuel cycle

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1976-07-01

    The IAEA is organizing a major conference on nuclear power and the nuclear fuel cycle, which is to be held from 2 to 13 May 1977 in Salzburg, Austria. The programme for the conference was published in the preceding issue of the IAEA Bulletin (Vol.18, No. 3/4). Topics to be covered at the conference include: world energy supply and demand, supply of nuclear fuel and fuel cycle services, radioactivity management (including transport), nuclear safety, public acceptance of nuclear power, safeguarding of nuclear materials, and nuclear power prospects in developing countries. The articles in the section that follows are intended to serve as an introduction to the topics to be discussed at the Salzburg Conference. They deal with the demand for uranium and nuclear fuel cycle services, uranium supplies, a computer simulation of regional fuel cycle centres, nuclear safety codes, management of radioactive wastes, and a pioneering research project on factors that determine public attitudes toward nuclear power. It is planned to present additional background articles, including a review of the world nuclear fuel reprocessing situation and developments in the uranium enrichment industry, in future issues of the Bulletin. (author)

  19. Nuclear theory progress report

    International Nuclear Information System (INIS)

    1991-01-01

    This report discusses research performed at University of Washington in nuclear theory. Some of the topics discussed are: nuclear astrophysics; symmetry; time reversal invariance; quark matter; superallowed beta decay; exclusive reactions; nuclear probes; soliton model; relativistic heavy ion collisions; supernova explosions; neutrino processes in dense matter; field theories; weak interaction physics; and nuclear structure

  20. Fundamentals of nuclear chemistry

    International Nuclear Information System (INIS)

    Majer, K.

    1982-01-01

    The textbook is a Czech-to-German translation of the second revised edition and covers the subject under the headings: general nuclear chemistry, methods of nuclear chemistry, preparative nuclear chemistry, analytical nuclear chemistry, and applied chemistry. The book is especially directed to students

  1. Nuclear power publications

    International Nuclear Information System (INIS)

    1982-01-01

    This booklet lists 69 publications on nuclear energy available free from some of the main organisations concerned with its development and operation in the UK. Headings are: general information; the need for nuclear energy; the nuclear industry; nuclear power stations; fuel cycle; safety; waste management. (U.K.)

  2. Nuclear energy and security

    International Nuclear Information System (INIS)

    Blejwas, Thomas E.; Sanders, Thomas L.; Eagan, Robert J.; Baker, Arnold B.

    2000-01-01

    Nuclear power is an important and, the authors believe, essential component of a secure nuclear future. Although nuclear fuel cycles create materials that have some potential for use in nuclear weapons, with appropriate fuel cycles, nuclear power could reduce rather than increase real proliferation risk worldwide. Future fuel cycles could be designed to avoid plutonium production, generate minimal amounts of plutonium in proliferation-resistant amounts or configurations, and/or transparently and efficiently consume plutonium already created. Furthermore, a strong and viable US nuclear infrastructure, of which nuclear power is a large element, is essential if the US is to maintain a leadership or even participatory role in defining the global nuclear infrastructure and controlling the proliferation of nuclear weapons. By focusing on new fuel cycles and new reactor technologies, it is possible to advantageously burn and reduce nuclear materials that could be used for nuclear weapons rather than increase and/or dispose of these materials. Thus, the authors suggest that planners for a secure nuclear future use technology to design an ideal future. In this future, nuclear power creates large amounts of virtually atmospherically clean energy while significantly lowering the threat of proliferation through the thoughtful use, physical security, and agreed-upon transparency of nuclear materials. The authors must develop options for policy makers that bring them as close as practical to this ideal. Just as Atoms for Peace became the ideal for the first nuclear century, they see a potential nuclear future that contributes significantly to power for peace and prosperity

  3. The French nuclear law

    International Nuclear Information System (INIS)

    Ito, Hiroshi

    2013-01-01

    The nuclear law had been out of the environmental law. The act on the transparency and the security of the nuclear matter was enacted in 2006 and set in the code of the environment in 2012. It means that the nuclear law is part of the environmental law and that it is advanced. I will report the French nuclear law. (author)

  4. Review of nuclear energy

    International Nuclear Information System (INIS)

    Mattila, L.; Anttila, M.; Pirilae, P.; Vuori, S.

    1997-05-01

    The report is an overview on the production of the nuclear energy all over the world. The amount of production at present and in future, availability of the nuclear fuel, development of nuclear technology, environmental and safety issues, radioactive waste management and commissioning of the plants and also the competitivity of nuclear energy compared with other energy forms are considered. (91 refs.)

  5. Nuclear literacy - Hungarian experiences

    International Nuclear Information System (INIS)

    Toth, E.; Marx, G.

    1996-01-01

    The operation of nuclear power plants and the related environmental sentiments make basic nuclear education to a precondition of modern democratic decision making. Nuclear chapters of the curriculum used to treat the topics in historical and descriptive, thus less convincing way. The question arises: how to offer nuclear literacy to the youth in general, to show its empirical aspects and relevance to citizens. (author)

  6. China and nuclear power

    International Nuclear Information System (INIS)

    Fouquoire-Brillet, E.

    1999-01-01

    This book presents the history of nuclear power development in China from the first research works started in the 1950's for the manufacturing of nuclear weapons to the recent development of nuclear power plants. This study tries to answer the main questions raised by the attitude of China with respect to the civil and military nuclear programs. (J.S.)

  7. Nuclear energy worldwide

    International Nuclear Information System (INIS)

    Fertel, M.

    2000-01-01

    In this short paper the author provides a list of tables and charts concerning the nuclear energy worldwide, the clean air benefits of nuclear energy, the nuclear competitiveness and the public opinion. He shows that the nuclear energy has a vital role to play in satisfying global energy and environmental goals. (A.L.B)

  8. Nuclear Reaction Data Centers

    International Nuclear Information System (INIS)

    McLane, V.; Nordborg, C.; Lemmel, H.D.; Manokhin, V.N.

    1988-01-01

    The cooperating Nuclear Reaction Data Centers are involved in the compilation and exchange of nuclear reaction data for incident neutrons, charged particles and photons. Individual centers may also have services in other areas, e.g., evaluated data, nuclear structure and decay data, reactor physics, nuclear safety; some of this information may also be exchanged between interested centers. 20 refs., 1 tab

  9. Security with nuclear weapons

    International Nuclear Information System (INIS)

    Karp, R.C.

    1991-01-01

    Recent improvements in East-West relations and the process of dramatic political change in Europe may result in unprecedented opportunities to reduce the global arsenal of nuclear weapons. Despite these welcome developments, the prospects for effectively controlling the spread of nuclear capability in the Third World have remained much less encouraging. The possibility of large reductions in nuclear weapons poses fundamental questions about their purpose. Why have some states chosen to acquire nuclear weapons? How and why have these decisions been maintained over time? Why have some states elected to approach, but not cross, the nuclear threshold? This book examines the commonalities and differences in political approaches to nuclear weapons both within and between three groups of states: nuclear, non-nuclear and threshold. The chapters explore the evolution of thinking about nuclear weapons and the role these weapons play in national security planning, and question the official security rationales offered by the nuclear weapon states for the maintenance of nuclear capabilities. For the non-nuclear weapon states, the book presents an analysis of alternative ways of assuring security and foreign policy effectiveness. For the threshold states, it examines the regional contexts within which these states maintain their threshold status. This book transcends traditional East-West approaches to analysis of nuclear issues by giving equal prominence to the issues of nuclear proliferation and non-nuclearism. The book also provides a comprehensive analysis of how current approaches to nuclear weapons have evolved both within and among the groups of countries under study

  10. Nuclear power revisited

    International Nuclear Information System (INIS)

    Grear, B.

    2008-01-01

    Modern development of nuclear power technology and the established framework of international agreements and conventions are responding to the major political, economic and environmental issues - high capital costs, the risks posed by nuclear wastes and accidents, and the proliferation of nuclear weaponry - that until recently hindered the expansion of nuclear power.

  11. Argentina's nuclear red herring

    International Nuclear Information System (INIS)

    Perera, J.

    1983-01-01

    The article deals with Argentina's nuclear power programme over the last 30 years, including the country's efforts to be nuclear independent of the United States, as well as its aspirations to be a nuclear supplier to latin America. The latter policy on economic, rather than military grounds for nuclear weapons, has led to Argentina's decision to build a uranian enrichment plant. (U.K.)

  12. Essay on nuclear law

    International Nuclear Information System (INIS)

    Puig, Diva

    1994-01-01

    This book is divided in seven parts, covering international organizations in nuclear energy. agreements, nuclear laws and environment, national legislation program and Uruguayan legislation. The texts of the nuclear laws in Uruguay are reproduced, and several aspects on nuclear energy are discussed

  13. Climatic change and nuclear

    International Nuclear Information System (INIS)

    Schneider, M.

    2003-01-01

    One of the main priorities of the WWF is to increase the implementing of solutions relative to the greenhouse effect fight. In this framework the foundation published a study on the nuclear facing the climatic change problem. The following chapters are detailed: the nuclear and the negotiations on the climatic change; the nuclear close; the unrealistic hypothesis of the nuclear forecast; the nuclear facing other energy supplying options; supplying efficiency for heating, electric power, gas and renewable energies; the consumption efficiency facing the nuclear; the economical aspects; the deregulation effect; the political aspects; the nuclear AND the greenhouse effect. (A.L.B.)

  14. Energy from nuclear fission()

    Science.gov (United States)

    Ripani, M.

    2015-08-01

    The main features of nuclear fission as physical phenomenon will be revisited, emphasizing its peculiarities with respect to other nuclear reactions. Some basic concepts underlying the operation of nuclear reactors and the main types of reactors will be illustrated, including fast reactors, showing the most important differences among them. The nuclear cycle and radioactive-nuclear-waste production will be also discussed, along with the perspectives offered by next generation nuclear assemblies being proposed. The current situation of nuclear power in the world, its role in reducing carbon emission and the available resources will be briefly illustrated.

  15. Collective nuclear dynamics. Proceedings

    International Nuclear Information System (INIS)

    Ivanyuk, F.A.

    1994-01-01

    The Fourth International school on nuclear physics was help on 29 Aug - 7 Sep, 1994 in Ukraine. The specialists discussed following subjects:liquid drop and the shell correction method; nuclear deformation energy and fission; nuclear structure at high spins, superdeformed states, structure of excited and exotic nuclei; nuclear fluid dynamics and large scale collective motion; order and chaos as they relate to the collective motion; quantum and interference phenomena in nuclear collisions; quasi-fission and multinucleon fragmentation effects; shell effects in non-nuclear systems; new nuclear facilities

  16. IAEA nuclear security program

    Energy Technology Data Exchange (ETDEWEB)

    Ek, D. [International Atomic Energy Agency, Vienna (Austria)

    2006-07-01

    Although nuclear security is a State responsibility, it is nevertheless an international concern, as the consequences of a nuclear security incident would have worldwide impact. These concerns have resulted in the development of numerous international instruments on nuclear security since the terrorist events in the USA on September 11, 2001. The IAEA Office of Nuclear Security has been charged to assist Member States to improvement their nuclear security and to meet the intent of these international obligations in order to ensure a cohesive thread of nuclear security protects the global community. The programs underway and planned by the Office of Nuclear Security will be discussed in this paper. (author)

  17. IAEA nuclear security program

    International Nuclear Information System (INIS)

    Ek, D.

    2006-01-01

    Although nuclear security is a State responsibility, it is nevertheless an international concern, as the consequences of a nuclear security incident would have worldwide impact. These concerns have resulted in the development of numerous international instruments on nuclear security since the terrorist events in the USA on September 11, 2001. The IAEA Office of Nuclear Security has been charged to assist Member States to improvement their nuclear security and to meet the intent of these international obligations in order to ensure a cohesive thread of nuclear security protects the global community. The programs underway and planned by the Office of Nuclear Security will be discussed in this paper. (author)

  18. The nuclear nineties

    International Nuclear Information System (INIS)

    Campbell, D.

    1990-01-01

    Although United States Customs recently prevented 40 krytrons, fast triggers to start a nuclear fission detonation, from being exported, other countries have been able to acquire similar items without questions being asked. Nuclear power plants have been exported to Pakistan and it is expected that this will enable Pakistan to become the world's ninth nuclear weapons state. Not all current or potential nuclear weapons states have signed and ratified the Non-Proliferation Treaty. Some nuclear plant have been built in developing countries without proper International Atomic Energy Authority Control. It would seem that there is a general indifference to nuclear proliferation by some of the western nuclear countries. (UK)

  19. Collective nuclear dynamics. Abstracts

    International Nuclear Information System (INIS)

    Abrosimov, V.I.; Kolomietz, V.M.

    1994-01-01

    The fourth International school on nuclear physics was help on 29 Aug - 7 Sep, 1994 in Ukraine. The specialists discussed following subjects: liquid drop and the shell correction method; nuclear deformation energy and fission; nuclear structure at high spins, superdeformed states, structure of excited and exotic nuclei; nuclear fluid dynamics and large scale collective motion; order and chaos as they relate to the collective motion; quantum and interference phenomena in nuclear collisions; quasi-fission and multinucleon fragmentation effects; shell effects in non-nuclear systems; new nuclear facilities

  20. Nuclear safety in France

    International Nuclear Information System (INIS)

    Servant, J.

    1979-12-01

    The main areas of nuclear safety are considered in this paper, recalling the laws and resolutions in force and also the appropriate authority in each case. The following topics are reviewed: radiological protection, protection of workers, measures to be taken in case of an accident, radioactive effluents, impact on the environment of non-nuclear pollution, nuclear plant safety, protection against malicious acts, control and safeguard of nuclear materials, radioisotopes, transport of radioactive substances, naval propulsion, waste management, nuclear plant decommissioning and export of nuclear equipment and materials. Finally, the author describes the role of the general Secretariat of the Interdepartmental Committee on Nuclear Safety