WorldWideScience

Sample records for alto lazio-1 reactor

  1. Yogurt funcional alto CLA

    OpenAIRE

    Massa Grilli, Elisa

    2012-01-01

    La presencia de compuestos bioactivos en la grasa láctea ha despertado gran interés ya que se le atribuyen efectos preventivos frente a enfermedades de alto impacto en la población. Se ha demostrado que los sistemas de alimentación basados en pastoreo incrementan la presencia de ácidos grasos poliinsaturados y específicamente del acido linoleico conjugado, obteniéndose un alimento funcional que presenta propiedades beneficiosas sobre la salud. El objetivo del presente ...

  2. ORDENAMENTO TERRITORIAL DO ALTO ACRE

    OpenAIRE

    Siviero, Amauri; Bayma, Marcio Muniz Albano; Medeiros, Magaly F.S.T.

    2008-01-01

    A implantação do ordenamento territorial do Alto Acre é etapa fundamental para o planejamento da ocupação dos espaços e direcionamento de atividades em busca do desenvolvimento regional. Este trabalho teve como objetivo criar um referencial teórico para a implantação do ordenamento territorial da região do Alto Acre. A organização deste trabalho foi dividida em duas partes: a primeira tratou da contextualização jurídico-institucional do ordenamento territorial da Amazônia, sua interface com z...

  3. Lacasa de alto potencial redox

    OpenAIRE

    Maté, Diana M.; Valdivieso, Malena; Fernández, Layla; Alcalde Galeote, Miguel

    2010-01-01

    La presente invención describe la evolución dirigida de una lacasa de alto potencial redox expresada funcionalmente en S. cerevisiae que presenta una alta tasa de producción, una elevada actividad y una gran termoestabilidad. La presente invención se refiere a la secuencia aminoacídica de dicha lacasa y a la secuencia nucleotídica que codifica para dicha lacasa. La lacasa de la invención presenta aplicaciones en diversos sectores: nano- biotecnología, industria papeler...

  4. Reactors

    International Nuclear Information System (INIS)

    Purpose: To provide a spray cooling structure wherein the steam phase in a bwr reactor vessel can sufficiently be cooled and the upper cap and flanges in the vessel can be cooled rapidly which kept from direct contaction with cold water. Constitution: An apertured shielding is provided in parallel spaced apart from the inner wall surface at the upper portion of a reactor vessel equipped with a spray nozzle, and the lower end of the shielding and the inner wall of the vessel are closed to each other so as to store the cooling water. Upon spray cooling, cooling water jetting out from the nozzle cools the vapor phase in the vessel and then hits against the shielding. Then the cooling water mostly falls as it is, while partially enters through the apertures to the back of the shielding plate, abuts against stoppers and falls down. The stoppers are formed in an inverted L shape so that the spray water may not in direct contaction with the inner wall of the vessel. (Horiuchi, T.)

  5. AP in PA (Advanced Programs in Palo Alto).

    Science.gov (United States)

    Lundy, Ruthe A.

    1979-01-01

    The article describes the various programs for gifted students in Palo Alto, California, a city with an unusually high percentage of gifted children. Programs are described at the elementary, middle school, and high school levels. (DLS)

  6. CALIFA, the Calar alto legacy integral field area survey

    DEFF Research Database (Denmark)

    Husemann, B.; Jahnke, K.; Sánchez, S. F.;

    2013-01-01

    We present the first public data release (DR1) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. It consists of science-grade optical datacubes for the first 100 of eventually 600 nearby (0.005 < z < 0.03) galaxies, obtained with the integral-field spectrograph PMAS/PPak mounted on th...

  7. The Alto Tandem and Isol Facility at IPN Orsay

    Science.gov (United States)

    Franchoo, Serge

    Alto is an infrastructure for experimental nuclear physics in France that comprises both an on-line isotope-separation facility based on the photofission of uranium and a stable-ion beam facility based on a 14.5-MV tandem accelerator. The isotope-separation on-line section of Alto is dedicated to the production of neutron-rich radioactive ion beams (RIB) from the interaction of the γ-flux induced by a 50-MeV 10-µA electron beam in a uranium-carbide target. It is dimensioned for 1011 fissions per second. The RIB facility is exploited in alternating mode with the tandem-based section of Alto, capable of accelerating both light ions for nuclear astrophysics and heavy ions for γ-spectroscopy. The facility thereby offers the opportunity to deliver beams to a large range of physics programmes from nuclear to interdisciplinary physics. In this article, we present the Alto facility as well as some of the highlights and prospects of the experimental programme.

  8. Open Spaces for Arts Education ‐ The ALTO Ecosystem

    NARCIS (Netherlands)

    Casey, John; Greller, Wolfgang; Davies, Hywel; Follows, Chris; Turner, Nancy; Webb-Ingall, Ed

    2012-01-01

    Casey, J., Greller, W., Davies, H., Follows, C., Turner, N., & Webb-­Ingall, E. (2011, 27-30 September). Open Spaces for Arts Education - The ALTO Ecosystem Model. Paper presentation of "Future Learning Spaces", at the 7th annual Designs on E-learning 2011 (DeoL) conference, Helsinki, Finland.

  9. Caracterización del entrenador de alto rendimiento deportivo

    OpenAIRE

    Pérez Ramírez, Mª del Carmen

    2002-01-01

    En este trabajo se hace una revisión de aquellos estudios que están relacionados con el proceso de entrenamiento, la formación del entrenador, los componentes que influyen en que su trabajo sea eficaz y las características de personalidad que le identifican. De esta forma, trataremos de conocer lo que caracteriza al entrenador de alto rendimiento deportivo.

  10. Automatic Terminal Information System for El Alto Airport

    OpenAIRE

    Vargas-Cuentas, Natalia Indira; Román-González, A

    2015-01-01

    The air traffic controllers of the El Alto airport must give to the landing and taking off aircrafts, necessary information such as the visibility of the runway, the wind speed and direction, cloud cover, temperature, pressure, etc. This information called Meteorological Terminal Aviation Routine Weather Report (METAR) is essential for taking decision respect to the landing procedure. At aerodromes with a considerable level of traffic, the METAR issue has become a problem, may cause congestio...

  11. Mejoramiento Habitacional en la Ciudad de El Alto

    OpenAIRE

    David Quezada Siles; Anelise Meléndez Lundgren

    2005-01-01

    El artículo reflexiona sobre el trabajo que realizamos en elProyecto de Mejoramiento de la Vivienda en la ciudad de ElAlto, que en su inicio estuvo bajo la responsabilidad de la ONGRed Hábitat con apoyo financiero de la cooperacióninternacional, que le permitía cubrir costos de administración ymanejar los recursos para la vivienda como un Fondo Rotatoriocon Asistencia Legal y Técnica, Fortalecimiento deOrganizaciones Sociales y labores de Investigación.Posteriormente y ante la importancia que...

  12. Burnout, locus de control y deportistas de alto rendimiento

    OpenAIRE

    Medina Mojena, Greisy; García Ucha, Francisco Enrique

    2002-01-01

    Los estudios sobre burnout comenzaron en los 70 por Freudenberg (1974) y en los 80 en el deporte. En Cuba este es de los primeros sobre el tema. Se estudiaron 40 deportistas de alto rendimiento de pesas, balonmano, baloncesto y tackewondo. Con una edad entre los 18 y 28 años y experiencia deportiva entre 5 y 16 años. Las técnicas utilizadas son una adaptación, de Garcés de Los Fayos (1999) del Maslach Burnout Inventory (1981) y un test de Locus de control. Los principales resultados c...

  13. Estudio cualitativo sobre entrenadores de alto rendimiento deportivo

    OpenAIRE

    Pérez Ramírez, Mª del Carmen

    2002-01-01

    En este trabajo se utiliza la perspectiva ideográfica para identificar el perfil del entrenador que actúa en el deporte de elite, analizar el proceso formativo y selectivo de estos profesionales y caracterizar los tipos de actuación que realizan. Para ello, se ha disenado un modelo de entrevista que permitirá conocer lo que caracteriza al entrenador de alto rendimiento deportivo. In this paper we use a idiographic perspective to identify the profile of a high performance sport coach. We an...

  14. The Calar Alto Observatory: current status and future instrumentation

    CERN Document Server

    Barrado, D; Aceituno, J; Pedraz, S; Sanchez, S F; Aguirre, A; Alises, M; Bergond, G; Galadi, D; Guijarro, A; Hoyo, F; Mast, D; Montoya, L; Sengupta, Ch; de Guindos, E; Solano, E

    2010-01-01

    The Calar Alto Observatory, located at 2168m height above the sea level in continental Europe, holds a signi?cant number of astronomical telescopes and experiments, covering a large range of the electromagnetic domain, from gamma-ray to near-infrared. It is a very well characterized site, with excellent logistics. Its main telescopes includes a large suite of instruments. At the present time, new instruments, namely CAFE, PANIC and Carmenes, are under development. We are also planning a new operational scheme in order to optimize the observatory resources.

  15. THE BURNED BONES IN TOCA DO ALTO DO CAPIM

    OpenAIRE

    Mauro Alexandre Farias Fontes; Lucas Braga da Silva

    2014-01-01

    Funerary practices are acts performed by a group and/or a family to the body of one or more individuals after death. Relating the terms funeral and practice is to admit the straight intentions of this research. By the way, it aims to search for archaeological evidence to attest the mortuary behavior in Toca do Alto do Capim, in the National Park of Serra das Confusões (Piauí). This site was dug up during three turns of researchthat happenedin 2008 and 2009. The remnants that were found are su...

  16. The Arctic Lower Troposphere Observed Structure (ALTOS) Campaign

    Energy Technology Data Exchange (ETDEWEB)

    Verlinde, J

    2010-10-18

    The ALTOS campaign focuses on operating a tethered observing system for routine in situ sampling of low-level (< 2 km) Arctic clouds. It has been a long-term hope to fly tethered systems at Barrow, Alaska, but it is clear that the Federal Aviation Administration (FAA) will not permit in-cloud tether systems at Barrow, even if unmanned aerial vehicle (UAV) operations are allowed in the future. We have provided the scientific rationale for long-term, routine in situ measurements of cloud and aerosol properties in the Arctic. The existing restricted air space at Oliktok offers an opportunity to do so.

  17. Nuclear Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Hogerton, John

    1964-01-01

    This pamphlet describes how reactors work; discusses reactor design; describes research, teaching, and materials testing reactors; production reactors; reactors for electric power generation; reactors for supply heat; reactors for propulsion; reactors for space; reactor safety; and reactors of tomorrow. The appendix discusses characteristics of U.S. civilian power reactor concepts and lists some of the U.S. reactor power projects, with location, type, capacity, owner, and startup date.

  18. Production and study of fission fragments, from Lohengrin to Alto

    International Nuclear Information System (INIS)

    The study of nuclei far from stability is constitutive of the history of nuclear physics at its very beginning and has been making considerable great strides since then. The study of these nuclei give the opportunity to reach new information on the nuclear structure and thus to measure the solidity of our knowledge on nuclear matter and its validity when it is pushed to its limits. The reaction selected for the production of exotic nuclei in the framework of the PARRNe program is the fission of uranium 238. The nuclei produced have an intermediate mass and are very rich in neutrons. The technique to recover them in order to accelerate them is the thick target method called also the Isol technique. The installation of the ancient Lep injector at the Tandem line in Orsay (IPN) is expected to increase by a factor 100 the production rate of exotic nuclei in the PARRNe program, it is the Alto project. The work presented here concerns studies carried out at the Lohengrin spectrometer installed at the ILL in Grenoble, and at the Tandem installation in Orsay. This document is divided into 4 parts: 1) in flight techniques at Lohengrin, 2) the Isol technique, 3) magic numbers in the domain N=50, and 4) the Alto project

  19. CAFE: Calar Alto Fiber-fed Echelle spectrograph

    CERN Document Server

    Aceituno, J; Grupp, F; Lillo, J; Hernan-Obispo, M; Benitez, D; Montoya, L M; Thiele, U; Pedraz, S; Barrado, D; Dreizler, S; Bean, J

    2013-01-01

    We present here CAFE, the Calar Alto Fiber-fed Echelle spectrograph, a new instrument built at the Centro Astronomico Hispano Alem\\'an (CAHA). CAFE is a single fiber, high-resolution ($R\\sim$70000) spectrograph, covering the wavelength range between 3650-9800\\AA. It was built on the basis of the common design for Echelle spectrographs. Its main aim is to measure radial velocities of stellar objects up to $V\\sim$13-14 mag with a precision as good as a few tens of $m s^{-1}$. To achieve this goal the design was simplified at maximum, removing all possible movable components, the central wavelength is fixed, so the wavelentgth coverage; no filter wheel, one slit and so on, with a particular care taken in the thermal and mechanical stability. The instrument is fully operational and publically accessible at the 2.2m telescope of the Calar Alto Observatory. In this article we describe (i) the design, summarizing its manufacturing phase; (ii) characterize the main properties of the instrument; (iii) describe the red...

  20. Natación de alto rendimiento en discapacitados

    OpenAIRE

    Astray Mendoza, Mario

    2014-01-01

    En este trabajo hago referencia a la evolución de la natación desde el inicio y su evolución histórica, haciendo una mención a sus principales fundadores y clubes, además de también nombrar a alguno de los nadadores más importantes de la historia de la natación española, para continuar con la evolución de las paralimpiadas y nuestros deportistas paralímpicos. Vemos las diferentes formas de entrenar en la natación de alto rendimiento, además de los músculos implicados en cada estilo y como ...

  1. EL ALTO MAGDALENA- COLOMBIA DE LA MANO CON ENERGIAS ALTERNATIVAS

    Directory of Open Access Journals (Sweden)

    Barragán-Alturo, Ancízar

    2013-12-01

    Full Text Available El afán por destruir un paradigma, que mantiene encadenados a los habitantes de Girardot y la región, a una compañía de distribución de la energía eléctrica con sus altos precios para el kilowatt-hora, ha inspirado la investigación CUNDINAMARCA DE LA MANO DE LAS ENERGIAS ALTERNATIVAS, demostrando por diversos caminos que el montaje de paneles solares para generación de energía eléctrica en las cubiertas de las casas es la energía alternativa para la solución de diversos problemas, entre ellos: los costos elevados, las fluctuaciones de voltaje, los cortes de energía, los daños en los electrodomésticos

  2. Technical and scientific report of the Alto project

    CERN Document Server

    Essabaa, S; Grialou, D; Ibrahim, F; Le Scornet, J C

    2002-01-01

    The Alto project means the installation of an electron linear accelerator inside the experimental area of the tandem accelerator of the nuclear physics institute of Orsay (IPNO, France). This linear accelerator comes from CERN where it was operating as a pre-injector for LEP. This equipment will allow IPNO'teams to perform fast kinetics studies in a domain different from that of ELYSE accelerator. The time resolution will not be as high as that of ELYSE (picosecond) but will be sufficient (microsecond) to produce free radicals in aqueous and gaseous media. The main expectations of this installation can be classified according 3 axis: 1) basic research (mainly the study of nuclear matter through photo-fission, 2) research and development of accelerators (by providing a test bench for new high frequency systems and superconducting components), and 3) applied research for industry concerning: biochemistry under irradiation, radiation sensibility, DNA breaking, food and drug sterilization and behaviour of electro...

  3. The Alto Paraguay Alkaline Province: petrographic, geochemical and geochronological characteristics

    International Nuclear Information System (INIS)

    The Alto Paraguay Province is located at the border of the State of Mato Grosso do Sul and Paraguay, between the coordinates 21 deg 10'to 23 deg 25'of Southern latitude and 57 deg 10' to 58 deg 00', having the city of Porto Murtinho as the main reference point. The geotectonic domain of the area is governed by the precambric units of the Southern extreme of the Amazonic craton which developed a long and accentuated activity, giving rise to folds and important faults, that in several cases seem to have exerted an effective control of the magmatic manifestations. Radiometric data indicate that the emplacement of the syenitic bodies took place in the Permo-Triassic period, with a major incidence in the interval 260-240 Ma, representing thus, an important phase of alkaline magmatic affinity associated to the Parana Basin which is believed is to be unique, since the other known areas (Central, Amambay and Rio Apa Provinces, Paraguay, Velasco Province, Bolivia) are considerably younger (140-120 Ma). Syenitic rocks from the Alto Paraguay Province show wide variation in the ratio 87 Sr/86 Sr (0.703361 - 0.707734). Excluding the Cerro Boggiani rocks (0.703837-0.707734), values for the nepheline syenites (0.703361-0.703672) general lower than those of the other syenites types. Alkaline syenites cover the interval 0.703510- 0.703872, while quartz syenites and syenogranites are 0.704562 and 0.707076, respectively. geologic evidence, in addition to petrographic, geochemical and isotopic (Sr) data, suggest that the syenitic rocks have been derived from an unique mantelic parental liquid, by fractional crystallization and assimilation processes, which are assumed to be occurred during the emplacement of the magma in the crust. (author)

  4. CAFE: Calar Alto Fiber-fed Échelle spectrograph

    Science.gov (United States)

    Aceituno, J.; Sánchez, S. F.; Grupp, F.; Lillo, J.; Hernán-Obispo, M.; Benitez, D.; Montoya, L. M.; Thiele, U.; Pedraz, S.; Barrado, D.; Dreizler, S.; Bean, J.

    2013-04-01

    We present here CAFE, the Calar Alto Fiber-fed Échelle spectrograph, a new instrument built at the Centro Astronomico Hispano Alemán (CAHA). CAFE is a single-fiber, high-resolution (R ~ 70 000) spectrograph, covering the wavelength range between 3650-9800 Å. It was built on the basis of the common design for Échelle spectrographs. Its main aim is to measure radial velocities of stellar objects up to V ~ 13-14 mag with a precision as good as a few tens of m s-1. To achieve this goal the design was simplified at maximum, removing all possible movable components, the central wavelength is fixed, as is the wavelength coverage; there is no filter wheel, etc. Particular care was taken with the thermal and mechanical stability. The instrument is fully operational and publically accessible at the 2.2 m telescope of the Calar Alto Observatory. In this article we describe (i) the design, summarizing its manufacturing phase; (ii) characterize the main properties of the instrument; (iii) describe the reduction pipeline; and (iv) show the results from the first light and commissioning runs. The preliminar results indicate that the instrument fulfills the specifications and can achieve the planned goals. In particular, the results show that the instrument is more efficient than anticipated, reaching a signal-to-noise of ~20 for a stellar object as faint as V ~ 14.5 mag in ~2700 s integration time. The instrument is a wonderful machine for exoplanetary research (by studying large samples of possible systems cotaining massive planets), galactic dynamics (highly precise radial velocities in moving groups or stellar associations), or astrochemistry.

  5. The Alto Tiberina Near Fault Observatory (northern Apennines, Italy

    Directory of Open Access Journals (Sweden)

    Lauro Chiaraluce

    2014-06-01

    Full Text Available The availability of multidisciplinary and high-resolution data is a fundamental requirement to understand the physics of earthquakes and faulting. We present the Alto Tiberina Near Fault Observatory (TABOO, a research infrastructure devoted to studying preparatory processes, slow and fast deformation along a fault system located in the upper Tiber Valley (northern Apennines, dominated by a 60 km long low-angle normal fault (Alto Tiberina, ATF active since the Quaternary. TABOO consists of 50 permanent seismic stations covering an area of 120 × 120 km2. The surface seismic stations are equipped with 3-components seismometers, one third of them hosting accelerometers. We instrumented three shallow (250 m boreholes with seismometers, creating a 3-dimensional antenna for studying micro-earthquakes sources (detection threshold is ML 0.5 and detecting transient signals. 24 of these sites are equipped with continuous geodetic GPS, forming two transects across the fault system. Geochemical and electromagnetic stations have been also deployed in the study area. In 36 months TABOO recorded 19,422 events with ML ≤ 3.8 corresponding to 23.36e-04 events per day per squared kilometres; one of the highest seismicity rate value observed in Italy. Seismicity distribution images the geometry of the ATF and its antithetic/synthetic structures located in the hanging-wall. TABOO can allow us to understand the seismogenic potential of the ATF and therefore contribute to the seismic hazard assessment of the area. The collected information on the geometry and deformation style of the fault will be used to elaborate ground shaking scenarios adopting diverse slip distributions and rupture directivity models.

  6. The Alto Paraguay Alkaline Province: petrographic, geochemical and geochronological characteristics; Provincia alcalina Alto Paraguai: caracteristicas petrograficas, geoquimicas e geocronologicas

    Energy Technology Data Exchange (ETDEWEB)

    Velazquez Fernandez, Victor

    1996-12-31

    The Alto Paraguay Province is located at the border of the State of Mato Grosso do Sul and Paraguay, between the coordinates 21 deg 10{sup `}to 23 deg 25{sup `}of Southern latitude and 57 deg 10{sup `} to 58 deg 00{sup `}, having the city of Porto Murtinho as the main reference point. The geotectonic domain of the area is governed by the precambric units of the Southern extreme of the Amazonic craton which developed a long and accentuated activity, giving rise to folds and important faults, that in several cases seem to have exerted an effective control of the magmatic manifestations. Radiometric data indicate that the emplacement of the syenitic bodies took place in the Permo-Triassic period, with a major incidence in the interval 260-240 Ma, representing thus, an important phase of alkaline magmatic affinity associated to the Parana Basin which is believed is to be unique, since the other known areas (Central, Amambay and Rio Apa Provinces, Paraguay, Velasco Province, Bolivia) are considerably younger (140-120 Ma). Syenitic rocks from the Alto Paraguay Province show wide variation in the ratio {sup 87} Sr/{sup 86} Sr (0.703361 - 0.707734). Excluding the Cerro Boggiani rocks (0.703837-0.707734), values for the nepheline syenites (0.703361-0.703672) general lower than those of the other syenites types. Alkaline syenites cover the interval 0.703510- 0.703872, while quartz syenites and syenogranites are 0.704562 and 0.707076, respectively. geologic evidence, in addition to petrographic, geochemical and isotopic (Sr) data, suggest that the syenitic rocks have been derived from an unique mantelic parental liquid, by fractional crystallization and assimilation processes, which are assumed to be occurred during the emplacement of the magma in the crust. (author) 124 refs., 52 figs., 7 tabs.

  7. Technical and scientific report of the Alto project

    International Nuclear Information System (INIS)

    The Alto project means the installation of an electron linear accelerator inside the experimental area of the tandem accelerator of the nuclear physics institute of Orsay (IPNO, France). This linear accelerator comes from CERN where it was operating as a pre-injector for LEP. This equipment will allow IPNO'teams to perform fast kinetics studies in a domain different from that of ELYSE accelerator. The time resolution will not be as high as that of ELYSE (picosecond) but will be sufficient (microsecond) to produce free radicals in aqueous and gaseous media. The main expectations of this installation can be classified according 3 axis: 1) basic research (mainly the study of nuclear matter through photo-fission, 2) research and development of accelerators (by providing a test bench for new high frequency systems and superconducting components), and 3) applied research for industry concerning: biochemistry under irradiation, radiation sensibility, DNA breaking, food and drug sterilization and behaviour of electronic components under irradiation. This rapport details the research program that could be achieved with this equipment, describes its contributions in terms of economic development, cooperation with industry, student training, and specifies the needed investment and the operating and maintenance costs. (A.C.)

  8. Production of exotic nuclei by photofission. ALTO Project: First results

    International Nuclear Information System (INIS)

    This PhD thesis has been carried out in the framework of ALTO Project (Accelerateur Lineaire Aupres du Tandem d'Orsay). a project exploiting photofission mode of neutron-rich nuclei for ISOL facilities. Our work deals with adaptation modes of the production environment represented by the target-ion source unit. We undertook an exhaustive radioprotection study in order to design and define the kinds of shielding necessary to face intense flux of photons and neutrons generated in the production target. Monte Carlo simulation with FLUKA code allowed to calculate the simultaneous transport of photons and neutrons with an entire modelling of very complicated geometrical structures. For the target-source unit and the critical points of beam loss, we propose an optimized shielding based mainly on the segmented structure. We have studied the adequacy of a thick carbide uranium target to produce neutron-rich nuclei by photofission. In particular, comparing the results of simulation with the experimental data, we have benchmarked FLUKA code for photofission with a 50 MeV electron beam. Finally, we present our works on the design and development of a FEBIAD-type-ion-source prototype: IRENA ion source, designed for next generation facilities. This work shows how important radioprotection considerations are also involved in the design of the ion source. (author)

  9. THE BURNED BONES IN TOCA DO ALTO DO CAPIM

    Directory of Open Access Journals (Sweden)

    Mauro Alexandre Farias Fontes

    2014-10-01

    Full Text Available Funerary practices are acts performed by a group and/or a family to the body of one or more individuals after death. Relating the terms funeral and practice is to admit the straight intentions of this research. By the way, it aims to search for archaeological evidence to attest the mortuary behavior in Toca do Alto do Capim, in the National Park of Serra das Confusões (Piauí. This site was dug up during three turns of researchthat happenedin 2008 and 2009. The remnants that were found are summarized in artifacts of chipped and polished stones, human and animal bones withburning marks, fires and a burial of a child. The results of this research were reached through spatial andosteological analysis, whichal lowed identifying a minimum number of five individuals, three chronological moments of occupation, as well as practices of primary burial and cremation.

  10. PANIC: the new panoramic NIR camera for Calar Alto

    CERN Document Server

    Baumeister, H; Vazquez, M C Cardenas; Fernández, M; Fried, J; Helmling, J; Huber, A; Mengual, J Ibanez; Gomez, J F Rodriguez; Laun, W; Lenzen, R; Mall, U; Naranjo, V; Ramos, J; Rohloff, R; Segura, A Garcia; Storz, C; Ubierna, M; Wagner, K

    2008-01-01

    PANIC is a wide-field NIR camera, which is currently under development for the Calar Alto observatory (CAHA) in Spain. It uses a mosaic of four Hawaii-2RG detectors and covers the spectral range from 0.8-2.5 micron(z to K-band). The field-of-view is 30x30 arcmin. This instrument can be used at the 2.2m telescope (0.45arcsec/pixel, 0.5x0.5 degree FOV) and at the 3.5m telescope (0.23arcsec/pixel, 0.25x0.25 degree FOV). The operating temperature is about 77K, achieved by liquid Nitrogen cooling. The cryogenic optics has three flat folding mirrors with diameters up to 282 mm and nine lenses with diameters between 130 mm and 255 mm. A compact filter unit can carry up to 19 filters distributed over four filter wheels. Narrow band (1%) filters can be used. The instrument has a diameter of 1.1 m and it is about 1 m long. The weight limit of 400 kg at the 2.2m telescope requires a light-weight cryostat design. The aluminium vacuum vessel and radiation shield have wall thicknesses of only 6 mm and 3 mm respectively.

  11. Ventaja de jugar en casa en voleibol de alto rendimiento

    Directory of Open Access Journals (Sweden)

    Rui Marcelino

    2009-01-01

    Full Text Available En este estudio se ha pretendido estudiar la ventaja en casa en el Voleibol de alto rendimiento, apoyándonos en las estadísticas de los partidos que más pueden explicar ese fenómeno. Se han analizado 65.949 acciones de juego seleccionadas de la Liga Mundial 2005. El instrumento de observación que se ha elaborado es una combinación de formato de campo con sistemas de categorías. Los datos se han obtenido mediante el "Volleyball Information System" y se han analizado mediante la prueba t de Student, y la prueba ji-cuadrado. Los resultados demuestran que hay ventaja en casa en Voleibol (57,5% de victorias jugando en casa. Las estadísticas del ataque (t= 2.49, p = 0.01, del servicio (t= -2.18, p= 0.03, de la recepción (t= 16.74, p<0.001 y de la distribución (t= 2.03, p= 0.04 muestran rendimientos superiores para los equipos que juegan en casa. No se han encontrado diferencias en el rendimiento del bloqueo (t= -0.25, p= 0.80 y la defensa (t= 0.11, p= 0.92 entre los juegos disputados en casa y los disputados fuera.

  12. The Low Redshift survey at Calar Alto (LoRCA)

    Science.gov (United States)

    Comparat, J.; Chuang, C.-H.; Rodríguez-Torres, S.; Pellejero-Ibanez, M.; Prada, F.; Yepes, G.; Courtois, H. M.; Zhao, G.-B.; Wang, Y.; Sanchez, J.; Maraston, C.; Metcalf, R. Benton; Peiro-Perez, J.; Kitaura, F. S.; Pérez, E.; González Delgado, R. M.

    2016-05-01

    The Baryon Acoustic Oscillation (BAO) feature in the power spectrum of galaxies provides a standard ruler to measure the accelerated expansion of the Universe. To extract all available information about dark energy, it is necessary to measure a standard ruler in the local, z < 0.2, universe where dark energy dominates most the energy density of the Universe. Though the volume available in the local universe is limited, it is just big enough to measure accurately the long 100 h-1 Mpc wave-mode of the BAO. Using cosmological N-body simulations and approximate methods based on Lagrangian perturbation theory, we construct a suite of a thousand light-cones to evaluate the precision at which one can measure the BAO standard ruler in the local universe. We find that using the most massive galaxies on the full sky (34 000 deg2), i.e. a K2MASS < 14 magnitude-limited sample, one can measure the BAO scale up to a precision of 4 per cent (˜1.2 per cent using reconstruction). We also find that such a survey would help to detect the dynamics of dark energy. Therefore, we propose a 3-year long observational project, named the Low Redshift survey at Calar Alto, to observe spectroscopically about 200 000 galaxies in the northern sky to contribute to the construction of aforementioned galaxy sample. The suite of light-cones is made available to the public.

  13. Aptitud combinatoria de líneas de maíz de valles altos en suelos con alto y bajo contenido de nitrógeno

    OpenAIRE

    Esaú del Carmen Moreno Pérez; David Lewis Beck; Tarcicio Cervantes Santana; José Luis Torres Flores

    2002-01-01

    El objetivo de este estudio fue identificar híbridos de maíz (Zea mays L.) de cruza simple de alto rendimiento en suelos de Valles Altos con alto y bajo contenido de nitrógeno. En 1999, en el Batán, México, se evaluaron 19 cruzas Ai x CML349 y x CML246, 33 cruzas Bj x CML244 y x CML352, donde Ai y Bj corresponden a líneas endogámicas derivadas de las poblaciones 902 y 903, respectivamente, del Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT); CML 349, 246, 244 y 352 son líneas pr...

  14. Wetlands at Palo Alto Battlefield National Historic Site and Surrounding Areas, Texas

    Data.gov (United States)

    National Park Service, Department of the Interior — This is a vector polygon coverage of wetlands at and surronding Palo Alto Battlefield National Historic Site, Texas. Roughly 20% of the park can be classified as...

  15. Farm Resilience in Organic and Nonorganic Cocoa Farming Systems in Alto Beni, Bolivia

    OpenAIRE

    Jacobi, Johanna; Schneider, Monika; Pillco Mariscal, María; Huber, Stephanie; Weidmann, Simon; Bottazzi, Patrick; Rist, Stephan

    2015-01-01

    Cocoa production in Alto Beni, Bolivia, is a major source of income and is severely affected by climate change impacts and other stress factors. Resilient farming systems are, thus, important for local families. This study compares indicators for social–ecological resilience in 30 organic and 22 nonorganic cocoa farms of Alto Beni. Organic farms had a higher tree and crop diversity, higher yields and incomes, more social connectedness, and participated in more courses on cocoa cultivation. Re...

  16. Metallogenic aspects of the feldspars and micas geochemistry in pegmatite from Alto-Ligonha (Mocambique)

    International Nuclear Information System (INIS)

    This paper deals with metallogenic aspects concerning the huge Alto Ligonha pegmatite Province. The geological setting of the pegmatites is briefly reviewed and the metamorphic grade of the country rocks of the pegmatites, ranging from granulitic to greenschist facies, has been considered. The economically most interesting pegmatites are those emplaced within rocks with lighter metamorphism. The available geochronological data allow us to link, the most interesting pegmatites from Alto Ligonha, to the Pan-African granitoid magmatism, about 500 Ma ago. (author)

  17. camarón del Alto Golfo de California

    Directory of Open Access Journals (Sweden)

    Homero R. Cabrera M.

    2006-01-01

    Full Text Available Actualmente la pesquería del camarón en el Alto Golfo de California genera preocupaciones referentes a su impacto sobre el medio ambiente, su viabilidad biológica y rentabilidad. Con el propósito de entender el manejo de esta pesquería y su productividad física, hemos examinado el comportamiento productivo de los barcos camaroneros de San Felipe, B.C. durante el periodo 1990-1993. Para ello usamos una función de producción frontera, flexible y no restringida, respecto a la cual estimamos la eficiencia técnica de cada una de las naves observadas. Nuestros resultados indican que la eficiencia promedio de la flota observada es del 80%, un valor de eficiencia cercano al mejor uso de la tecnología productiva y de los factores de la producción. Las naves más viejas resultaron menos eficientes, un resultado esperado; sin embargo, el tamaño de la cooperativa y calidad de su administración afectó positivamente los valores de eficiencia de las naves asociadas enmascarando con ello el efecto antes mencionado y favoreciendo el desarrollo de economías de escala. Los resultados indican también que el conocimiento acumulativo sobre la pesquería del camarón entre los productores es una variable importante, en términos de su efecto sobre la eficiencia productiva de las naves, mientras que la innovación tecnológica ha sido escasa, excepto por los excluidores de tortugas incorporados a su tecnología de captura durante 1996. Concluimos de nuestro análisis que la divulgación del conocimiento sobre la pesquería, como una variable social de cambio desincorporada a la función de producción, y el fortalecimiento de la calidad de los servicios administrativos, son dos aspectos fundamentales a promover para el desarrollo de esta pesquería. También argumentamos que la semejanza tecnológica y operativa entre ambas flotas, la de San Felipe, B.C. y el resto de la flota del camarón que pesca en el Golfo de California permite que nuestro an

  18. Bolivia. The new nuclear research center in El Alto

    Energy Technology Data Exchange (ETDEWEB)

    Nogarin, Mauro

    2016-05-15

    Research reactors in Latin America have become a priority in public policy in the last decade. Bolivia wants to become the 8th country to implement peaceful nuclear technology in this area with the new Center for Research and Development in the Nuclear Technology. The Center will be the most advanced in Latin America. It will provide for a wide use of radiation technologies in agriculture, medicine, and industry. After several negotiations Bolivia and the Russian Federation signed the Intergovernmental Agreement on cooperation in the peaceful use of atomic energy and the construction of the Nuclear Research and Technology Center.

  19. Bolivia. The new nuclear research center in El Alto

    International Nuclear Information System (INIS)

    Research reactors in Latin America have become a priority in public policy in the last decade. Bolivia wants to become the 8th country to implement peaceful nuclear technology in this area with the new Center for Research and Development in the Nuclear Technology. The Center will be the most advanced in Latin America. It will provide for a wide use of radiation technologies in agriculture, medicine, and industry. After several negotiations Bolivia and the Russian Federation signed the Intergovernmental Agreement on cooperation in the peaceful use of atomic energy and the construction of the Nuclear Research and Technology Center.

  20. N Reactor

    Data.gov (United States)

    Federal Laboratory Consortium — The last of Hanfordqaodmasdkwaspemas7ajkqlsmdqpakldnzsdflss nine plutonium production reactors to be built was the N Reactor.This reactor was called a dual purpose...

  1. CALIFA, the Calar Alto Legacy Integral Field Area survey: IV. Third Public data release

    OpenAIRE

    Sánchez, S. F.; García-Benito, R.; Zibetti, S.; Walcher, C. J.; Husemann, B.; Mendoza, M. A.; Galbany, L.; Falcón-Barroso, J.; D. Mast; Aceituno, J.; Aguerri, J. A. L.; Alves, J; de Amorim, A. L.; Ascasibar, Y.; Barrado-Navascues, D.

    2016-01-01

    This paper describes the Third Public Data Release (DR3) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. Science-grade quality data for 667 galaxies are made public, including the 200 galaxies of the Second Public Data Release (DR2). Data were obtained with the integral-field spectrograph PMAS/PPak mounted on the 3.5m telescope at the Calar Alto Observatory. Three different spectral setups are available, i) a low-resolution V500 setup covering the wavelength range 3749-7500 AA (...

  2. Estudio microbiológico de los alimentos elaborados en comedores colectivos de alto riesgo

    OpenAIRE

    Pérez-Silva García Mª del Carmen; Belmonte Cortés Susana; Martínez Corral Javier

    1998-01-01

    FUNDAMENTO: Valorar los resultados del análisis microbiológico de los alimentos preparados en comedores colectivos de alto riesgo, con el fin de conocer el grado de contaminación de los alimentos, analizar las causas de dicha contaminación y mejorar la situación sanitaria de estos establecimientos. MÉTODOS: Estudio observacional descriptivo con los datos obtenidos de la inspección sanitaria en 44 comedores colectivos de alto riesgo, que incluyó el análisis microbiológico de 90 alimentos, así ...

  3. Pilates como complemento del entrenamiento en fútbol de alto rendimiento

    OpenAIRE

    Olmo Cárceles, Natalia del

    2015-01-01

    Editar registro: Hoy en día existen muchos métodos distintos de entrenamiento que inciden en todas las cualidades físicas. El método Pilates es uno de ellos, y a pesar de sus múltiples beneficios, es un entrenamiento que no se ha incorporado en los clubes de alto rendimiento como complemento del entrenamiento. En este trabajo realizo una reflexión sobre las características y los beneficios que aporta este método. Su posible aplicación en el entrenamiento de fútbol de alto rendimiento, tanto c...

  4. Narrativas sobre a experiência de ser puérpera de alto risco

    OpenAIRE

    Ariane Thaise Frello Roque; Telma Elisa Carraro

    2015-01-01

    Objetivo: Quando o puerpério ocorre concomitantemente à hospitalização do recém-nascido, leva a puérpera a tornar-se acompanhante na Unidade Neonatal, o que pode influenciar seu poder vital conceituando-se o Puerpério de Alto Risco. O objetivo deste estudo foi conhecer a experiência de ser puérpera de alto risco. Métodos: Narrativo com abordagem qualitativa, sustentado em Florence Nightingale. Realizado em uma instituição pública do sul do Brasil, de janeiro a março de 2010, foram sujeitos da...

  5. El desarrollo del turismo en el Parque Natural del Alto Tajo

    OpenAIRE

    Antonio Mora Sánchez; María Jesús Such Devesa; José Luis Córdoba Leiva

    2001-01-01

    Este artículo analiza el espacio geográfico delimitado por el Parque Natural del Alto Tajo, buscando métodos y sistemas cuya implantación permitan un desarrollo de la zona desde el punto de vista turístico y que, por otro lado, asegure la compatibilidad de las medidas de desarrollo que se emprendan con las exigencias y ventajas que supone el área geográfica del espacio natural del Alto Tajo. Con objeto de establecer las bases que permitan comprender las posibilidades de desarro...

  6. Situación estimada de la zona cohesiva en el horno alto

    OpenAIRE

    Cores Sánchez, A.; Saiz de Ayala, J.; Mochón Muñoz, J.; Ruiz Bustinza, I.; Parra, R.

    2010-01-01

    [ES]En planta piloto se fabrica una serie de sinterizados a partir de mezclas minerales como las utilizadas en el horno alto. Se caracterizan los sinterizados mediante análisis químico y granulométrico y determinación de las temperaturas de reblandecimiento y fusión. En el horno alto, mediante una serie de sondas, se determinan las temperaturas en el horno, lo que permite situar la posición de la isoterma de mayor temperatura de 950 °C, que corresponde a la zona de reserva térmica...

  7. Reactor Physics

    International Nuclear Information System (INIS)

    The Reactor Physics and MYRRHA Department of SCK-CEN offers expertise in various areas of reactor physics, in particular in neutronics calculations, reactor dosimetry, reactor operation, reactor safety and control and non-destructive analysis of reactor fuel. This expertise is applied in the Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 reactor dosimetry, and the preparation and interpretation of irradiation experiments by means of neutron and gamma calculations. The activities of the Fuzzy Logic and Intelligent Technologies in Nuclear Science programme cover several domains outside the department. Progress and achievements in these topical areas in 2000 are summarised

  8. Reactor Physics

    International Nuclear Information System (INIS)

    SCK-CEN's Reactor Physics and MYRRHA Department offers expertise in various areas of reactor physics, in particular in neutron and gamma calculations, reactor dosimetry, reactor operation and control, reactor code benchmarking and reactor safety calculations. This expertise is applied in the Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 materials testing reactor dosimetry, and the preparation and interpretation of irradiation experiments by means of neutron and gamma calculations. The activities of the Fuzzy Logic and Intelligent Technologies in Nuclear Science programme cover several domains outside the department. Progress and achievements in these topical areas in 2001 are summarised

  9. Reactor Physics

    Energy Technology Data Exchange (ETDEWEB)

    Ait Abderrahim, A

    2001-04-01

    The Reactor Physics and MYRRHA Department of SCK-CEN offers expertise in various areas of reactor physics, in particular in neutronics calculations, reactor dosimetry, reactor operation, reactor safety and control and non-destructive analysis of reactor fuel. This expertise is applied in the Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 reactor dosimetry, and the preparation and interpretation of irradiation experiments by means of neutron and gamma calculations. The activities of the Fuzzy Logic and Intelligent Technologies in Nuclear Science programme cover several domains outside the department. Progress and achievements in these topical areas in 2000 are summarised.

  10. Reactor operation

    CERN Document Server

    Shaw, J

    2013-01-01

    Reactor Operation covers the theoretical aspects and design information of nuclear reactors. This book is composed of nine chapters that also consider their control, calibration, and experimentation.The opening chapters present the general problems of reactor operation and the principles of reactor control and operation. The succeeding chapters deal with the instrumentation, start-up, pre-commissioning, and physical experiments of nuclear reactors. The remaining chapters are devoted to the control rod calibrations and temperature coefficient measurements in the reactor. These chapters also exp

  11. Reactor safeguards

    CERN Document Server

    Russell, Charles R

    2013-01-01

    Reactor Safeguards provides information for all who are interested in the subject of reactor safeguards. Much of the material is descriptive although some sections are written for the engineer or physicist directly concerned with hazards analysis or site selection problems. The book opens with an introductory chapter on radiation hazards, the construction of nuclear reactors, safety issues, and the operation of nuclear reactors. This is followed by separate chapters that discuss radioactive materials, reactor kinetics, control and safety systems, containment, safety features for water reactor

  12. Procedimiento de obtención de aceites o grasas con alto contenido antioxidante

    OpenAIRE

    Cert, Arturo; Romero, Ana; Mateos Briz, Raquel; Alcudia-González, Felipe; Espartero, José L.; Trujillo Pérez-Lanzac, Mariana

    2010-01-01

    La presente invención se refiere a un nuevo procedimiento de obtención de aceites o grasas con alto contenido antioxidante, debido a la acción de compuestos de naturaleza fenólica y en concreto debido al hidroxitirosol y esteres grasos de hidroxitirosilo.

  13. Changes without changes: the Puebla's Alto Atoyac sub-basin case in Mexico

    NARCIS (Netherlands)

    Bressers, Hans; Casiano, Cesar

    2015-01-01

    Since the year 2000, actions at the three governmental levels have taken place to improve water quality in Mexico’s Puebla Alto Atoyac sub-basin. This paper reports a situation in which several policy actors have been striving for water quality improvement in that polluted sub-basin. However, when t

  14. Research Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Martens, Frederick H. [Argonne National Laboratory; Jacobson, Norman H.

    1968-09-01

    This booklet discusses research reactors - reactors designed to provide a source of neutrons and/or gamma radiation for research, or to aid in the investigation of the effects of radiation on any type of material.

  15. Research reactors

    International Nuclear Information System (INIS)

    This article proposes an overview of research reactors, i.e. nuclear reactors of less than 100 MW. Generally, these reactors are used as neutron generators for basic research in matter sciences and for technological research as a support to power reactors. The author proposes an overview of the general design of research reactors in terms of core size, of number of fissions, of neutron flow, of neutron space distribution. He outlines that this design is a compromise between a compact enough core, a sufficient experiment volume, and high enough power densities without affecting neutron performance or its experimental use. The author evokes the safety framework (same regulations as for power reactors, more constraining measures after Fukushima, international bodies). He presents the main characteristics and operation of the two families which represent almost all research reactors; firstly, heavy water reactors (photos, drawings and figures illustrate different examples); and secondly light water moderated and cooled reactors with a distinction between open core pool reactors like Melusine and Triton, pool reactors with containment, experimental fast breeder reactors (Rapsodie, the Russian BOR 60, the Chinese CEFR). The author describes the main uses of research reactors: basic research, applied and technological research, safety tests, production of radio-isotopes for medicine and industry, analysis of elements present under the form of traces at very low concentrations, non destructive testing, doping of silicon mono-crystalline ingots. The author then discusses the relationship between research reactors and non proliferation, and finally evokes perspectives (decrease of the number of research reactors in the world, the Jules Horowitz project)

  16. Reactor physics and reactor computations

    International Nuclear Information System (INIS)

    Mathematical methods and computer calculations for nuclear and thermonuclear reactor kinetics, reactor physics, neutron transport theory, core lattice parameters, waste treatment by transmutation, breeding, nuclear and thermonuclear fuels are the main interests of the conference

  17. Research reactors

    International Nuclear Information System (INIS)

    There are currently 284 research reactors in operation, and 12 under construction around the world. Of the operating reactors, nearly two-thirds are used exclusively for research, and the rest for a variety of purposes, including training, testing, and critical assembly. For more than 50 years, research reactor programs have contributed greatly to the scientific and educational communities. Today, six of the world's research reactors are being shut down, three of which are in the USA. With government budget constraints and the growing proliferation concerns surrounding the use of highly enriched uranium in some of these reactors, the future of nuclear research could be impacted

  18. Reactor container

    International Nuclear Information System (INIS)

    Object: To provide a jet and missile protective wall of a configuration being inflated toward the center of a reactor container on the inside of a body of the reactor container disposed within a biological shield wall to thereby increase safety of the reactor container. Structure: A jet and missile protective wall comprised of curved surfaces internally formed with a plurality of arch inflations filled with concrete between inner and outer iron plates and shape steel beam is provided between a reactor container surrounded by a biological shield wall and a thermal shield wall surrounding the reactor pressure vessel, and an adiabatic heat insulating material is filled in space therebetween. (Yoshino, Y.)

  19. Production and study of fission fragments, from Lohengrin to Alto; Production et etude des fragments de fission, de Lohengrin a Alto

    Energy Technology Data Exchange (ETDEWEB)

    Ibrahim, F

    2005-06-15

    The study of nuclei far from stability is constitutive of the history of nuclear physics at its very beginning and has been making considerable great strides since then. The study of these nuclei give the opportunity to reach new information on the nuclear structure and thus to measure the solidity of our knowledge on nuclear matter and its validity when it is pushed to its limits. The reaction selected for the production of exotic nuclei in the framework of the PARRNe program is the fission of uranium 238. The nuclei produced have an intermediate mass and are very rich in neutrons. The technique to recover them in order to accelerate them is the thick target method called also the Isol technique. The installation of the ancient Lep injector at the Tandem line in Orsay (IPN) is expected to increase by a factor 100 the production rate of exotic nuclei in the PARRNe program, it is the Alto project. The work presented here concerns studies carried out at the Lohengrin spectrometer installed at the ILL in Grenoble, and at the Tandem installation in Orsay. This document is divided into 4 parts: 1) in flight techniques at Lohengrin, 2) the Isol technique, 3) magic numbers in the domain N=50, and 4) the Alto project.

  20. Tromboembolismo pulmonar masivo de alto riesgo asociado a foramen oval permeable

    Directory of Open Access Journals (Sweden)

    Antonio Miranda

    2012-04-01

    Full Text Available La alta mortalidad de los pacientes con tromboembolismo pulmonar masivo de alto riesgo amerita un enfoque terapéutico enérgico e invasivo que incluya la embolectomía pulmonar quirúrgica en aquellos pacientes con contraindicación para trombolisis o trombolisis fallida. Describimos un caso de tromboembolismo pulmonar masivo de alto riesgo que recibió tratamiento quirúrgico en vez de trombolisis debido a que al momento del diagnóstico presentaba un trombo móvil a través de un foramen oval permeable con altísima posibilidad de embolismo paradójico arterial.

  1. Collective Agency and Living Well - Activism, community involvement and poetics in El Alto, Bolivia

    OpenAIRE

    Oltedal, Ane Lyngstad

    2012-01-01

    Demonstrations, communal discussions and resistance are everyday matters in the Bolivian highland city of El Alto. It took on a whole new dimension in October 2003 when thousands of protesters took to the streets in this city, demanding control of Bolivia’s gas resources. Two presidents had to withdraw, leading up to the historic victory of Bolivia’s first indigenous president, Evo Morales who won on a platform of nationalization and constitutional reform. From that moment, the people of El A...

  2. Moessbauer study of archaeological ceramics from Valle del Alto Sinu (Colombia)

    International Nuclear Information System (INIS)

    A physico-chemical characterization of ceramic samples from the arachaeological sites of El Cabrero, El Gallo, and El Frasquillo (Valle del Alto Sinu) is presented. Extensive use of Moessbauer spectroscopy data reveals that the currently used typological classification scheme of Dolmatoff is related to the production technology of the different artifacts. In addition, a model for firing conditions for ''Rojo Sencillo'', ''Tierra Impresa'', ''Tierra Incisa'', and ''Blanco'' types of ceramics is proposed. (orig.)

  3. A micro-computer based employee scheduling system for the Palo Alto Veterans Administration Medical Center

    OpenAIRE

    Buyske, James Michael; Call, Steven Verdell

    1988-01-01

    Approved for public release; distribution is unlimited This thesis provides the Palo Alto Veterans Administration Dietetics Division with a micro-computer based employee scheduling system. It includes a discussion of the system analysis and design, program development, and system implementation. The use of a prototyping development methodology and its implications is a central discussion point. http://archive.org/details/microcomputerbas00buys Lieutenant Commander. ...

  4. Reactor building

    International Nuclear Information System (INIS)

    The whole reactor building is accommodated in a shaft and is sealed level with the earth's surface by a building ceiling, which provides protection against penetration due to external effects. The building ceiling is supported on walls of the reactor building, which line the shaft and transfer the vertical components of forces to the foundations. The thickness of the walls is designed to withstand horizontal pressure waves in the floor. The building ceiling has an opening above the reactor, which must be closed by cover plates. Operating equipment for the reactor can be situated above the building ceiling. (orig./HP)

  5. Heterogeneous reactors

    International Nuclear Information System (INIS)

    The microscopic study of a cell is meant for the determination of the infinite multiplication factor of the cell, which is given by the four factor formula: K(infinite) = n(epsilon)pf. The analysis of an homogeneous reactor is similar to that of an heterogeneous reactor, but each factor of the four factor formula can not be calculated by the formulas developed in the case of an homogeneous reactor. A great number of methods was developed for the calculation of heterogeneous reactors and some of them are discussed. (Author)

  6. Digital Geologic Map of Palo Alto Battlefield National Historic Site and vicinity, Texas (NPS, GRD, GRE, PAAL, PAAL digital map)

    Data.gov (United States)

    National Park Service, Department of the Interior — The Digital Geologic Map of Palo Alto Battlefield National Historic Site and vicinity, Texas is composed of GIS data layers complete with ArcMap 9.2 layer (.LYR)...

  7. Aesthetic Communication and Intercultural Perspective. A Qualitative Analysis of Aesthetic Perceptions of the Brand "Südtirol/Alto Adige"

    OpenAIRE

    Bua, Vincenzo

    2009-01-01

    In the qualitative study of mental associations with the brand picture "Südtirol/Alto Adige" different images of the region among German speaking, Italian speaking and bilingually grown up South Tyroleans were analysed. The research interest was focused on the communalities and differences in these associations in order to identify potentially conflicting positions between the two major language groups in Südtirol/Alto Adige. In this paper the method is demonstrated which was used to display ...

  8. Plasma reactor

    OpenAIRE

    Molina Mansilla, Ricardo; Erra Serrabasa, Pilar; Bertrán Serra, Enric

    2008-01-01

    [EN] A plasma reactor that can operate in a wide pressure range, from vacuum and low pressures to atmospheric pressure and higher pressures. The plasma reactor is also able to regulate other important settings and can be used for processing a wide range of different samples, such as relatively large samples or samples with rough surfaces.

  9. Reactor physics

    International Nuclear Information System (INIS)

    Progress in research on reactor physics in 1997 at the Belgian Nuclear Research Centre SCK/CEN is described. Activities in the following four domains are discussed: core physics, ex-core neutron transport, experiments in Materials Testing Reactors, international benchmarks

  10. Compact Reactor

    International Nuclear Information System (INIS)

    Weyl's Gauge Principle of 1929 has been used to establish Weyl's Quantum Principle (WQP) that requires that the Weyl scale factor should be unity. It has been shown that the WQP requires the following: quantum mechanics must be used to determine system states; the electrostatic potential must be non-singular and quantified; interactions between particles with different electric charges (i.e. electron and proton) do not obey Newton's Third Law at sub-nuclear separations, and nuclear particles may be much different than expected using the standard model. The above WQP requirements lead to a potential fusion reactor wherein deuterium nuclei are preferentially fused into helium nuclei. Because the deuterium nuclei are preferentially fused into helium nuclei at temperatures and energies lower than specified by the standard model there is no harmful radiation as a byproduct of this fusion process. Therefore, a reactor using this reaction does not need any shielding to contain such radiation. The energy released from each reaction and the absence of shielding makes the deuterium-plus-deuterium-to-helium (DDH) reactor very compact when compared to other reactors, both fission and fusion types. Moreover, the potential energy output per reactor weight and the absence of harmful radiation makes the DDH reactor an ideal candidate for space power. The logic is summarized by which the WQP requires the above conditions that make the prediction of DDH possible. The details of the DDH reaction will be presented along with the specifics of why the DDH reactor may be made to cause two deuterium nuclei to preferentially fuse to a helium nucleus. The presentation will also indicate the calculations needed to predict the reactor temperature as a function of fuel loading, reactor size, and desired output and will include the progress achieved to date

  11. Estudio microbiológico de los alimentos elaborados en comedores colectivos de alto riesgo

    Directory of Open Access Journals (Sweden)

    Pérez-Silva García Mª del Carmen

    1998-01-01

    Full Text Available FUNDAMENTO: Valorar los resultados del análisis microbiológico de los alimentos preparados en comedores colectivos de alto riesgo, con el fin de conocer el grado de contaminación de los alimentos, analizar las causas de dicha contaminación y mejorar la situación sanitaria de estos establecimientos. MÉTODOS: Estudio observacional descriptivo con los datos obtenidos de la inspección sanitaria en 44 comedores colectivos de alto riesgo, que incluyó el análisis microbiológico de 90 alimentos, así como la inspección sanitaria de los establecimientos. RESULTADOS: En los colegios los microorganismos mesófilos fueron los contaminantes más frecuentes; en las guarderías y residencias de ancianos predominaron los indicadores de higiene deficiente en la manipulación de alimentos. Los microorganismos mesófilos se encontraron durante los meses fríos en mayor proporción que durante los meses cálidos. Los indicadores de higiene deficiente aparecieron generalmente en los alimentos preparados en establecimientos en los que se observaron deficiencias. Los microorganismos psicrótrofos no se encontraron en ninguno de los alimentos recogidos en guarderías y sí en colegios y residencias de ancianos. CONCLUSIONES: Este estudio indica qué problemas predominan en cada tipo de comedor colectivo de alto riesgo. Los mesófilos aparecen en los alimentos elaborados en cocinas de tamaño grande, los indicadores de higiene deficiente se encontraron asociados a una manipulación de alimentos por personal no profesional y a establecimientos con deficiencias, y los psicrótrofos se detectaron en aquellos establecimientos que guardan la comida sobrante. Se sugieren recomendaciones para la eliminación de los problemas detectados.

  12. Calidad del coque de Horno Alto en la Unión Europea

    Directory of Open Access Journals (Sweden)

    Alvarez, R.

    2002-10-01

    Full Text Available After a brief review of the coking technology at the beginning of the new millennium, blast furnace coke quality criteria of most of EU countries, presented by the European Blast Furnace Committee in the 4th European Coke and Ironmaking Congress, are compared with those used by the Spanish Steel Industry at Aceralia. Blast furnace coke quality is very high in EU's countries in order to meet the requirements of bigger blast furnaces commissioned in the last years. CSR index is the most important parameter in the control of coke quality in Europe.

    En el presente trabajo se ha llevado a cabo una breve revisión de las tecnologías de coquización existentes al comienzo del nuevo milenio. Los criterios de calidad del coque de Horno Alto de la mayoría de los países de la Unión Europea, recogidos por el European Blast Furnace Committee, y que fueron presentados en el 4th European Coke and Ironmaking Congress en París durante el año 2000, se comparan con los utilizados por la industria siderúrgica española Aceralia. Como consecuencia del sensible aumento experimentado en el tamaño de los modernos Hornos Altos durante los últimos años, se ha podido comprobar que, en la UE, los valores de los diversos parámetros de control de calidad del coque son bastante similares y con unos requerimientos muy elevados. Asimismo, en la UE el parámetro CSR se ha convertido en el más importante para el control de la calidad del coque de Horno Alto.

  13. Rb-Sr measurements on metamorphic rocks from the Barro Alto Complex, Goias, Brazil

    International Nuclear Information System (INIS)

    The Barro Alto Complex comprises a highly deformed and metamorphosed association of plutonic, volcanic, and sedimentary rocks exposed in a 150 x 25 Km boomerang-like strip in Central Goias, Brazil. It is the southernmost tip of an extensive yet discontinuous belt of granulite and amphibolite facies metamorphic rocks which include the Niquelandia and Cana Brava complexes to the north. Two rock associations are distinguished within the granulite belt. The first one comprises a sequence of fine-grained mafic granulite, hypersthene-quartz-feldspar granulite, garnet quartzite, sillimanite-garnet-cordierite gneiss, calc-silicate rock, and magnetite-rich iron formation. The second association comprises medium-to coarse-grained mafic rocks. The medium-grade rocks of the western/northern portion (Barro Alto Complex) comprise both layered mafic rocks and a volcanic-sedimentary sequence, deformed and metamorphosed under amphibolite facies conditions. The fine-grained amphibolite form the basal part of the Juscelandia meta volcanic-sedimentary sequence. A geochronologic investigation by the Rb-Sr method has been carried out mainly on felsic rocks from the granulite belt and gneisses of the Juscelandia sequence. The analytical results for the Juscelandia sequence are presented. Isotope results for rocks from different outcrops along the gneiss layer near Juscelandia are also presented. In conclusion, Rb-Sr isotope measurements suggest that the Barro Alto rocks have undergone at least one important metamorphic event during Middle Proterozoic times, around 1300 Ma ago. During that event volcanic and sedimentary rocks of the Juscelandia sequence, as well as the underlying gabbro-anorthosite layered complex, underwent deformation and recrystallization under amphibolite facies conditions. (author)

  14. Primeira Reportagem da Mosca Minadora em Cebola no Alto Paranaíba

    OpenAIRE

    Flávia Alves; Flávio Fernandes; Paulo Silva; Jéssica Gorri; Luan Ribeiro

    2014-01-01

    Liriomyza spp. é considera praga em várias culturas no Brasil. As larvas confeccionam minas nas folhas, reduzem a área fotossintética, causam murcha e queda precoce de folhas. Objetivou-se neste trabalho reportar o primeiro ataque de Liriomyza spp., seu dano e a sobrevivência em cebola (Allium cepa L.) no Alto Paranaíba-MG. A sua ocorrência e o prejuízo foram detectados em cinco avaliações em 12 lavouras de cebola (50 plantas/ha). Já a sobrevivência foi determinada em condições de temperatura...

  15. ??Desarrollo o decadencia? La Esmeralda como modelo de progreso para los yanomami del Alto Orinoco

    OpenAIRE

    Acu??a Delgado, ??ngel

    2008-01-01

    La Esmeralda ocupa la cabecera del municipio Alto Orinoco dentro del Estado Amazonas (Venezuela). Los yanomami, grupo ??tnico m??s numeroso de la zona, no tienen residencia fija en dicho lugar pero s?? acuden regularmente a ??l, por ser el espacio m??s pr??ximo donde se reproduce, supuestamente, el esquema m??s avanzado de la sociedad rural venezolana. Pero ??qu?? encuentran en ese lugar? ??Cu??l es el modelo de desarrollo que desde all?? se les propone? A ello responderemos en base a la expe...

  16. Computación de alto desempeño en GPU

    OpenAIRE

    Piccoli, María Fabiana

    2011-01-01

    Este libro es el resultado del trabajo de investigación sobre las características de la GPU y su adopción como arquitectura masivamente paralela para aplicaciones de propósito general. Su propósito es transformarse en una herramienta útil para guiar los primeros pasos de aquellos que se inician en la computación de alto desempeños en GPU. Pretende resumir el estado del arte considerando la bibliografía propuesta. El objetivo no es solamente describir la arquitectura many-core de la GPU y l...

  17. Studi limnologici sul Lago Alto Flumendosa (Sardegna centrale): stato trofico e fitoplancton

    OpenAIRE

    Lugliè, Antonella Gesuina Laura; Manca, Bastianina; Sechi, Nicola

    1997-01-01

    Alto Flumendosa Reservoir (Central Sardinia), was investigated from February 1990 to February 1993, to study either long time period phytoplankton variations in a mesotrophic mediterranean reservoir and to value the influence of a cage rearing pisciculture on its trophic status. The annual mean values of clorophyll a varied from 2.3 mg m-3 in 1991 to 11.1 mg m-3 in 1990, annual mean values of biomass from 0.5 mg l-1 in 1993 to 3.9 mg l-1 in 1990 and annual mean values of cellular densit...

  18. El Alto: una ficción política

    OpenAIRE

    Poupeau, Franck

    2014-01-01

    Desde inicios de los años 2000, la ciudad de El Alto se ha vuelto el símbolo de una Bolivia rebelde, popular y autoorganizada, donde se manifestaría más que en cualquier otro lugar, el renacer de las luchas indígenas. Si esta visión tiene que ser considerada como parte del objeto estudiado, no puede ser aceptada tal cual. Desde su fundación y crecimiento a principios del siglo XX, esta ciudad periférica, que obtuvo su independencia administrativa en los años 1980, siempre ha cumplido una func...

  19. Tendinitis rotuliana y pliometría en juniors de alto rendimiento

    OpenAIRE

    Esper Di Cesare, Pablo Alberto; Esper, Pablo Nicolás

    2013-01-01

    Habitualmente los trabajos y estudios publicados sobre el entrenamiento de la potencia pliométrica de miembros inferiores orientados hacia el alto rendimiento deportivo en baloncesto, son realizados sobre atletas de elite, pero no así sobre jugadores que están en la etapa del traspaso de las categorías Junior a las Elites, pero que, en muchos casos, entrenan juntos, sin que se respete su individualidad biológica, llevando en muchos casos a lesiones tendinosas por un inadecuado trabajo metodol...

  20. Productividad de variedades precoces de maíz de grano amarillo para Valles Altos

    OpenAIRE

    Margarita Tadeo Robledo; Alejandro Espinosa Calderón; Israel Arteaga Escamilla; Viridiana Trejo Pastor; Mauro Sierra Macías; Roberto Valdivia Bernal; Benjamín Zamudio González

    2012-01-01

    México importa anualmente diez millones de toneladas de grano de maíz amarillo; por lo que se requiere incrementar la producción. El uso de semilla mejorada es un elemento clave, para alcanzar niveles competitivos en la producción. Una opción para atender esta demanda y aminorar las dificultades por las condiciones limitantes del temporal, son las variedades de grano amarillo de ciclo corto, cuya disponibilidad en Valles Altos es escasa. En la Facultad de Estudios Superiores Cuautitlán, de la...

  1. RESULTADOS MATERNO PERINATALES EN LA CONSULTA DE ALTO RIESGO, SES HOSPITAL DE CALDAS, 2009-2011

    OpenAIRE

    Jorge Eduardo Vélez Arango; Luis Edilberto Herrera Morales; Fernando Arango Gómez; Ana Lucía Herrera Betancourt; Julio Alejandro Peña Duque

    2013-01-01

    Objetivo: Describir el resultado materno perinatal de las usuarias de la consulta de Alto Riesgo Obstétrico, SES Hospital de Caldas, atendidas desde septiembre 1 de 2009 hasta el 31 de agosto de 2011; estableciendo un comparativo con los resultados perinatales de las pacientes no consideradas de riesgo, dadas de alta de la consulta. Materiales y Métodos: Estudio de tipo prospectivo, descriptivo. Para la recolección de la información se consultaron historias clínicas hospitalarias, obteniendo ...

  2. Trastorno de espectro autista de alto funcionamiento y su relación con la familia

    OpenAIRE

    González Villafáñez, María Felisa

    2014-01-01

    El objetivo de este trabajo consiste en analizar las dificultades que tienen los adolescentes con Trastorno del Espectro Autista de Alto Funcionamiento (TEA-AF), en sus relaciones sociales y familiares. Este análisis ha requerido la revisión de las diversas definiciones y teorías explicativas del citado trastorno. A su vez también se describen las terapias conocidas hasta hoy para crear un programa de apoyo a los familiares (padres, hermanos, abuelos…) que se relacionan con dicho adolescente....

  3. Conservation and public presentation of the argaric site of Castellón Alto (Galera, Granada

    Directory of Open Access Journals (Sweden)

    Rodríguez-Ariza, M. Oliva

    2000-12-01

    Full Text Available The magnificent preservation of the archaeological site of Castellón Alto permitted reconstruction of the urbanism of this settlement and the life of its inhabitants. In addition to the necessary conservation, two interventions have been carried out with the principal objective of facilitating access, visiting, and the understanding of the site by the majority of the public. The first intervention happened in 1989 and the main task was centered on the consolidation, restoration, and delimiting of the archaeological bed. The second one happened in 1997 and was centered in the consolidation and reconstruction of both a hut and two tombs. With the opening of the Archaeological Museum of Galera, the cultural and touristic contribution of Castellón Alto will be complete. It will provide an interpretation of this prehistoric village, as well as the Argaric culture in general and all the other archaeological sites of the area.

    La magnífica conservación del registro arqueológico del Castellón Alto permitía reconstruir el urbanismo del poblado y la vida de estas poblaciones. Se han efectuado dos actuaciones con el objetivo principal de facilitar, además de la necesaria conservación, el acceso, la visita y la comprensión del poblado prehistórico por parte de un público mayoritario. La primera actuación se realizó en 1989 y los trabajos se centraron principalmente en la consolidación, restauración y cerramiento del área del yacimiento. La segunda se realizó en 1997 y se centró en el acondicionamiento y reconstrucción de una cabaña y dos sepulturas. La oferta turística y cultural que ofrece el Castellón Alto se completará con la próxima apertura del Museo Arqueológico de Galera, donde se efectuará una interpretación de este poblado y de la cultura argárica, así como del resto de yacimientos de la zona.

  4. Trayectorias sociales de jóvenes comerciantes ambulantes en la ciudad de El Alto

    OpenAIRE

    Luna Acevedo, Héctor

    2016-01-01

    El comercio informal representa una fuente de ingresos importantes para los jóvenes comerciantes ambulantes de la ciudad de El Alto. Entre 15 y 30 años, representan el 30% del total de la población del municipio, donde una proporción significativa de ellos, a parte de tener alguna actividad comercial, estudian en colegios de secundaria o en un centro de formación superior. Esta realidad expresa una combinación entre la actividad comercial y estudiantil. Ambas son imprescindibles para garantiz...

  5. Funciones ejecutivas en estudiantes universitarios que presentan bajo y alto rendimiento académico

    OpenAIRE

    Ernesto Barceló Martínez; Soraya Lewis Harb; Mayilín Moreno Torres

    2006-01-01

    Esta investigación se propuso encontrar la posible relación entre el rendimiento académico y la ausencia de ciertas habilidades cognoscitivas denominadas desde la neuropsicología como funciones ejecutivas, en un grupo de estudiantes universitarios. Se exploró entonces el estado de las funciones ejecutivas en estudiantes universitarios que presentaban bajo y alto rendimiento académico. El diseño utilizado en esta investigación fue el transeccional descriptivo. El análisis de los...

  6. NEUTRONIC REACTOR

    Science.gov (United States)

    Anderson, H.L.

    1960-09-20

    A nuclear reactor is described comprising fissionable material dispersed in graphite blocks, helium filling the voids of the blocks and the spaces therebetween, and means other than the helium in thermal conductive contact with the graphite for removing heat.

  7. 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.

  8. Nuclear reactors

    International Nuclear Information System (INIS)

    This draft chart contains graphical symbols from which the type of (nuclear) reactor can be seen. They will serve as illustrations for graphical sketches. Important features of the individual reactor types are marked out graphically. The user can combine these symbols to characterize a specific reactor type. The basic graphical symbol is a square with a point in the centre. Functional groups can be depicted for closer specification. If two functional groups are not clearly separated, this is symbolized by a dotted line or a channel. Supply and discharge lines for coolant, moderator and fuel are specified in accordance with DIN 2481 and can be further specified by additional symbols if necessary. The examples in the paper show several different reactor types. (orig./AK)

  9. Identidad, intercambio y aventura en el Alto Neuquén IDENTITY, TRADE, AND ADVENTURE IN THE ALTO NEUQUÉN

    Directory of Open Access Journals (Sweden)

    Rolando Silla

    2009-12-01

    Full Text Available Pretendemos analizar cómo son considerados los denominados chilenos que habitan el lado occidental de los Andes por los grupos denominados crianceros (pastores trashumantes que habitan una serie de localidades y parajes rurales del Alto Neuquén, patagonia argentina. Veremos que en el sistema clasificatorio y autoclasi- ficatorio de estos grupos opera el principio de los indiscernibles: las categorías adscriptivas se multiplican sin solución de continuidad. Se manifiesta así una superposición y continuidad de identidades más que oposiciones entre el argentino, el chileno, el mapuche, etc. Esto es lo que observamos cuando empezamos a analizar las categorías de adscripción en acto y no como modelo. Nos proponemos señalar cómo esta ambigüedad y superposición de identidades se hace también manifiesto en valoraciones ambiguas y superpuestas respecto a cómo los crianceros argentinos valoran moralmente a los crianceros chilenos. Para ello analizaré ciertas situaciones de intercambio que se caracterizan por ser poco claras, tales como el comercio, el robo y el contrabando de ganado que ocurre a ambos lados de la frontera internacional.This article examines how Chileans living in the Western Andes are thought of by the crianceros (transhumanance shepherds who live in the Alto Neuquén, (Argentinean Patagonian. It is observed that the principle of indiscernible operates in the classificatory and self-classificatory systems of these groups: the ascriptive categories cannot be discerned or distinguished from one another and multiply ad infinitum. A superposition and continuity of identities is manifested rather than an opposition between Argentineans, Chileans, Mapuche, and so on. These forms appear when ascriptive categories are analyzed in action rather than in models. It is shown that such ambiguity and superposition of identities is also made manifest in ambiguous and superposed moral judgments of Chilean shepherds by Argentinean

  10. Multifunctional reactors

    OpenAIRE

    Westerterp, K.R.

    1992-01-01

    Multifunctional reactors are single pieces of equipment in which, besides the reaction, other functions are carried out simultaneously. The other functions can be a heat, mass or momentum transfer operation and even another reaction. Multifunctional reactors are not new, but they have received much emphasis in research in the last decade. A survey is given of modern developments and the first successful applications on a large scale. It is explained why their application in many instances is ...

  11. NUCLEAR REACTOR

    Science.gov (United States)

    Anderson, C.R.

    1962-07-24

    A fluidized bed nuclear reactor and a method of operating such a reactor are described. In the design means are provided for flowing a liquid moderator upwardly through the center of a bed of pellets of a nentron-fissionable material at such a rate as to obtain particulate fluidization while constraining the lower pontion of the bed into a conical shape. A smooth circulation of particles rising in the center and falling at the outside of the bed is thereby established. (AEC)

  12. Nuclear reactor

    International Nuclear Information System (INIS)

    In order to reduce neutron embrittlement of the pressue vessel of an LWR, blanked off elements are fitted at the edge of the reactor core, with the same dimensions as the fuel elements. They are parallel to each other, and to the edge of the reactor taking the place of fuel rods, and are plates of neutron-absorbing material (stainless steel, boron steel, borated Al). (HP)

  13. Breeder reactors

    International Nuclear Information System (INIS)

    The reasons for the development of fast reactors are briefly reviewed (a propitious neutron balance oriented towards a maximum uranium burnup) and its special requirements (cooling, fissile material density and reprocessing) discussed. The three stages in the French program of fast reactor development are outlined with Rapsodie at Cadarache, Phenix at Marcoule, and Super Phenix at Creys-Malville. The more specific features of the program of research and development are emphasized: kinetics and the core, the fuel and the components

  14. ALTO RIESGO DE CONSUMO DE ALCOHOL EN TRABAJADORES DE ATENCIÓN PRIMARIA DE SALUD, LORETO, PERÚ, 2011

    Directory of Open Access Journals (Sweden)

    Henry Zagaceta Camiñas

    2012-06-01

    Full Text Available El consumo de alcohol de alto riesgo o dependencia puede afectar la salud y el desempeño profesional. Los trabajadores de la atención primaria de salud (TAPS son clave en la referencia, prevención y tratamiento de las consecuencias de este consumo. Sin embargo, existe poca evidencia sobre el nivel de consumo de alcohol en TAPS. La investigación fue de tipo transversal, aleatorizado por conveniencia. 150 TAPS (médicos, enfermeras y obstetras de 3 centros de salud primarios fueron reclutados y se les aplicó el Cuestionario de Identificación de los Trastornos debidos al Consumo de Alcohol (AUDIT. Los TAPS de los tres centros estudiados, presentaron un alto porcentaje de bebedores en alto riesgo (40%-46%, al menos 50% de bebedores de alto riesgo fueron de sexo masculino y en grupos de edad correspondiente al rango de 31 a 40 años (56.3%. El porcentaje de bebedores con dependencia encontrado en este estudio es mayor a lo encontrado en otros estudios nacionales que incluían Loreto. El alto riesgo de consumo de alcohol podría ser un problema laboral aun no evaluado en salud que necesita futura investigación.

  15. CALIFA, the Calar Alto Legacy Integral Field Area survey: IV. Third Public data release

    CERN Document Server

    Sánchez, S F; Zibetti, S; Walcher, C J; Husemann, B; Mendoza, M A; Galbany, L; Falcón-Barroso, J; Mast, D; Aceituno, J; Aguerri, J A L; Alves, J; Amorim, A L; Ascasibar, Y; Barrado-Navascues, D; Barrera-Ballesteros, J; Bekeraite, S; Bland-Hawthorn, J; Díaz, M Cano; Fernandes, R Cid; Cavichia, O; Cortijo, C; Dannerbauer, H; Demleitner, M; Díaz, A; Dettmar, R J; de Lorenzo-Cáceres, A; del Olmo, A; Gallazzi, A; García-Lorenzo, B; de Paz, A Gil; Delgado, R González; Holmes, L; Iglésias-Páramo, J; Kehrig, C; Kelz, A; Kennicutt, R C; Kleemann, B; Lacerda, E A D; Fernández, R López; Sánchez, A R López; Lyubenova, M; Marino, R; Márquez, I; Mendez-Abreu, J; Mollá, M; Minakata, R Ortega; Torres-Papaqui, J P; Pérez, E; Rosales-Ortega, F F; Roth, M M; Sánchez-Blázquez, P; Schilling, U; Spekkens, K; Asari, N Vale; Bosch, R C E van den; van de Ven, G; Vilchez, J M; Wild, V; Wisotzki, L; Yıldırım, A; Ziegler, B

    2016-01-01

    This paper describes the Third Public Data Release (DR3) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. Science-grade quality data for 667 galaxies are made public, including the 200 galaxies of the Second Public Data Release (DR2). Data were obtained with the integral-field spectrograph PMAS/PPak mounted on the 3.5m telescope at the Calar Alto Observatory. Three different spectral setups are available, i) a low-resolution V500 setup covering the wavelength range 3749-7500 AA (4240-7140 AA unvignetted) with a spectral resolution of 6.0 AA (FWHM), for 646 galaxies, ii) a medium-resolution V1200 setup covering the wavelength range 3650-4840 AA (3650-4620 AA unvignetted) with a spectral resolution of 2.3 AA (FWHM), for 484 galaxies, and iii) the combination of the cubes from both setups (called COMBO), with a spectral resolution of 6.0 AA and a wavelength range between 3700-7500 AA (3700-7140 AA unvignetted), for 446 galaxies. The Main Sample, selected and observed according to the CALIFA survey s...

  16. Comparison between global solar radiation models in Aquidauana, “Alto Pantanal” region, Brazil

    Directory of Open Access Journals (Sweden)

    Gabriel Queiroz de Oliveira

    2014-09-01

    Full Text Available Solar radiation is a meteorological component of great importance to soil-plant-atmosphere processes, and the majority of weather stations do not register this component since they do not have the equipment for its quantification. The objective of this study was to evaluate the efficiency of models to estimate solar radiation for the annual, rainy and dry periods in Aquidauana “Alto Pantanal” region of Mato Grosso do Sul, Brazil. This study was conducted using meteorological data obtained from January 2008 to December 201. The automatic meteorological station was located in Aquidauana, and belongs to the network of the Instituto Nacional de Meteorologia (INMET. The data collected included maximum and minimum temperatures, and solar radiation. The Annandale, Bristow-Campbell, Hargreaves-Samani and Weiss empirical models were evaluated, and all were compared with the solar radiation value measured by the meteorological station. In Aquidauana, the Alto Pantanal region of Mato Grosso do Sul, regardless of the time of year, the Bristow-Campbell model is recommended to estimate solar radiation.

  17. Development of robots for rehabilitation therapy: the Palo Alto VA/Stanford experience.

    Science.gov (United States)

    Burgar, C G; Lum, P S; Shor, P C; Machiel Van der Loos, H F

    2000-01-01

    For over 25 years, personal assistant robots for severely disabled individuals have been in development. More recently, using robots to deliver rehabilitation therapy has been proposed. This paper summarizes the development and clinical testing of three mechatronic systems for post-stroke therapy conducted at the VA Palo Alto in collaboration with Stanford University. We describe the philosophy and experiences that guided their evolution. Unique to the Palo Alto approach is provision for bimanual, mirror-image, patient-controlled therapeutic exercise. Proof-of-concept was established with a 2-degree-of-freedom (DOF) elbow/forearm manipulator. Tests of a second-generation therapy robot producing planar forearm movements in 19 hemiplegic and control subjects confirmed the validity and reliability of interaction forces during mechanically assisted upper-limb movements. Clinical trials comparing 3-D robot-assisted therapy to traditional therapy in 21 chronic stroke subjects showed significant improvement in the Fugl-Meyer (FM) measure of motor recovery in the robot group, which exceeded improvements in the control group. PMID:11321002

  18. Litho-structural and geophysics features of the Alto Paranaiba Uplift

    International Nuclear Information System (INIS)

    The Alto Paranaiba Uplift (APU) is an almost elliptical tectonic feature of the Western Minas Gerais/Southern Goias region, which was active mostly during the Cretaceous. It separated the Parana Basin, during the formation of the Sao Bento, Uberaba and Bauru sequences, from the Alto-Sanfranciscana Basin, at the time of formation of the Areado, Patos, Capacete and Urucuia sequences. The Bouguer anomaly data indicate that the APU developed at the southwestern border of the ancient Brasilia crustal block and is represented by an almost elliptical gravity high of 15 mgal, locally disturbed by positive and negative the presence of important lineaments of a NW-SE set, mostly crossing the southwestern half of the APU. The APU development, the magmatism and the lateral basin formation involved reactivation of preexisting discontinuities and are related to a mantle plume. The tectonic development was aborted at the uplift stage during Cretaceous, after the deposition of the Bauru and Urucuia sequences, as is indicated by the Pratinha peneplane, now elevated at about 1.100 m altitude, which sculpture ended at the beginning of the Tertiary. The APU is one tectonic feature like other similar anomalies also aborted in the uplift stage or in the rift stage, which developed in Southern Brazil during the time of Atlantic Ocean opening. (author)

  19. Liderar equipos de alto desempeño: un gran reto para las organizaciones actuales.

    Directory of Open Access Journals (Sweden)

    Ana Fernanda Uribe R.

    2013-12-01

    Full Text Available Los continuos e impredecibles cambios que deben afrontar las organizaciones en la actualidad les exigen asumir retos cada vez más complejos que les garanticen resultados para sobrevivir en un mercado altamente competitivo. Tal condición requiere de directivos que optimicen sus habilidades para liderar equipos, considerando unas características que antes parecían irrelevantes. El propósito de éste estudio es delimitar conceptualmente el liderazgo en relación con los equipos de alto desempeño y discutir entorno al rol que este debe tener en su conformación y mantenimiento. Se puntualiza sobre la necesidad de que el líder se convierta en un facilitador para la transformación no solo de las personas que componen los equipos, sino dela organización, a través de desarrollo y crecimiento. Se plantea la necesidad de incluir en los procesos de dirección exitosa de equipos de alto desempeño factores como la estrategia organizacional, la gestión humana y la estructura organizacional, todos ellos permeados necesariamente por los estilos de liderazgo y la actitud del líder hacia el cambio.

  20. Conservation and valorisation of Giovanni Boccaccio’s house museum in Certaldo Alto

    Directory of Open Access Journals (Sweden)

    Massimo Gennari

    2012-04-01

    Full Text Available The architectural restoration and functional redevelopment of Boccacio’s house in Certaldo Alto (Florence, has been carried out between 2006 and 2007 and finalized in 2011, including the reconstruction of the garden next to the house. The program which has been characterized by a strong civic, social and cultural involvement, is lead by the Ente Nazionale G. Boccaccio in partnership whit the local administration and aims at contributing to the valorization of the historical, architectural and cultural heritage of the historic center of Certaldo Alto. Valorization here is intended as a functional integration and synergy between predominantly cultural activities. The aim is to achieve the best results in terms of social development as well as intellectual growth within a virtuous economy, and therefore the construction of a complementary model for cultural assets in general. A model where the single cultural elements (museums, libraries, workrooms, exhibitions, auditorium, etc.. represent only the intersections of a wider net system established through the process of communication and exchange with the institutions, publics or privates, that operate in the sectors of research, experimentation, education and information. This means that the management of cultural assets will now aim mainly at the interaction between its components and nationals as well as international structures of education and research, institutes for the social and economical development and innovative business structures in the fields of communication and cultural and sustainable tourism. This establishes an additional value of his still underestimated significance.

  1. Comentario al libro Alto Purús: Biodiversidad, Conservación y Manejo

    Directory of Open Access Journals (Sweden)

    Antonio Brack

    2013-06-01

    Full Text Available La región del río Purús y las zonas aleda- ñas son unas de las menos conocidas del Perú; de muy difícil acceso, donde se logra llegar prácticamente sólo por avioneta. Es por eso que el revisar el libro Alto Purús: Biodiversidad, Conservación y Manejo constituye un verdadero placer y satisfacción pues permite conocer sobre la naturaleza y las actividades humanas que se realizan en esa región. En primer lugar podemos resaltar que el trabajo de campo y la recopilación de información fueron realizadas por un equipo de 40 biólogos, geógrafos, conservacionistas y sociólogos, y que recorrieron la zona realizando trabajos puntuales, porque es un área tan extensa que sólo se podría cubrir por completo en varios años. Los editores de la obra califican a la región del Alto Purús como de importancia estratégica por su función de corredor ecológico, al conectar otras áreas protegidas del Perú, además de ser el hogar de grupos humanos poco conocidos y en contacto incipiente.

  2. Structure of neutron rich nuclei of Germanium and Gallium beyond N equals 50 at Alto

    International Nuclear Information System (INIS)

    The gamma rays following the beta decay of the following very neutron-rich isotopes: 82,83,84Ga produced by photo-fission, have been studied at the newly built ISOL facility in Orsay: ALTO. In ALTO the interaction of an electron beam with U238 target generates a continuous spectra of Bremsstrahlung gamma radiation that triggers U238 fission. The fission fragments are then ionized, extracted and mass-separated. The analysis of the data has shown the existence of an isomer in 3184Ga53 and has enabled us to confirm known results on 3283Ge51 energy levels including the gamma transition between the 1/2+ state at 247,7 KeV and the fundamental state. We have also proposed the first energy level scheme for 3384As51. In order to understand the structure of the nucleus we have used the Thankappan and True model that gives a description of the coupling between the pair-pair core (half-magical) and the single nucleon. This model applied to the N=51 chain (3889Sr51, 3687Kr51, 3485Se51, 3283Ge51 and 3081Zn51) has allowed us to see the main features of odd isotope structure. We have also confirmed previous results concerning the nature of the states in the following decay 3183Ga52 → 3283Ge51

  3. Innovación, empresarialidad, y capital intelectual en PyMEs de alto crecimiento: Estudio realizado sobre PyMEs de alto crecimiento en Brasil, Chile y México

    OpenAIRE

    Rudi Loossens

    2009-01-01

    De cara a profundizar el conocimiento y la caracterización de los empresarios dinámicos en America Latina y el Caribe, y en particular los factores determinantes en la innovación y creación de valor en las PYMEs de Alto Crecimiento, el FOMIN, en colaboración con la División de Ciencia y Tecnología del BID han lanzado un estudio sobre PYMEs de Alto Crecimiento en América Latina con el apoyo financiero del Programa de Apoyo a la Innovación del Fondo General de Cooperación Española.

  4. Research reactors - an overview

    Energy Technology Data Exchange (ETDEWEB)

    West, C.D.

    1997-03-01

    A broad overview of different types of research and type reactors is provided in this paper. Reactor designs and operating conditions are briefly described for four reactors. The reactor types described include swimming pool reactors, the High Flux Isotope Reactor, the Mark I TRIGA reactor, and the Advanced Neutron Source reactor. Emphasis in the descriptions is placed on safety-related features of the reactors. 7 refs., 7 figs., 2 tabs.

  5. El deslizamiento de Palo Alto, Turrialba, Costa Rica : apuntes para su estudio

    Directory of Open Access Journals (Sweden)

    Peraldo Huertas, Giovanni

    2015-12-01

    Full Text Available En este trabajo se busca caracterizar, desde un punto de vista geomorfológico y geológico, el deslizamiento de Palo Alto, en el contexto de los megaprocesos de inestabilidad de laderas presentes en las laderas del río Reventazón. El corredor del río Reventazón, entre Turrialba y Siquirres, muestra una serie de procesos complejos de remoción en masa, que generan morfologías típicas de procesos de deslizamiento, tan continuas que dan una apariencia morfológica caótica, donde es difícil definir patrones de movimiento del terreno. El área de inestabilidad de Palo Alto se reconoce fácilmente incluso en el mapa topográfico correspondiente a escala 1:50 000, pues muestra una típica forma en herradura. Los límites del deslizamiento están bien marcados mediante escarpes bien definidos en campo, pero los extremos de las coronas laterales hacia el oeste se desdibujan debido, entre otras cosas, a que en esos sectores queda indefinido el límite al norte con el área de inestabilidad compleja de Bonilla y al sur con el área similar de Guayabo - Lajas. Se efectuó una fotointerpretación del área de estudio, mediante la revisión de fotos aéreas de la línea de vuelo Orosi-Pejibaye, escala 1:20 000 del año 1988, así como fotografías aéreas del proyecto Terra 1998, con el fin de observar posibles cambios en los procesos erosivos, así como en la forma del deslizamiento. Posteriormente, se realizó trabajo de campo para revisar la morfología fotointerpretada, analizar la conformación geológica a nivel de litología y estructura y así afinar la interpretación final de la geomorfología del área inestable de Palo Alto. Desde un punto de vista geológico, el área de estudio está compuesta por rocas sedimentarias del Neógeno, tales como la Fm. Uscari (Mioceno y las formaciones Suretka y Fm. Doán (Plioceno; además de aglomerados que posiblemente se relacionan al volcanismo holoceno de la cordillera volcánica Central. Mediante an

  6. Reactor utilization

    International Nuclear Information System (INIS)

    In 1962, the RA reactor was operated almost three times more than in 1961, producing total of 25 555 MWh. Diagram containing comparative data about reactor operation for 1960, 1961, and 1962, percent of fuel used and U-235 burnup shows increase in reactor operation. Number of samples irradiated was 659, number of experiments done was 16. mean powered level was 5.93 MW. Fuel was added into the core twice during the reporting year. In fact the core was increased from 56 to 68 fuel channels and later to 84 fuel channels. Fuel was added to the core when the reactivity worth decreased to the minimum operation level due to burnup. In addition to this 5 central fuel channels were exchanged with fresh fuel in february for the purpose of irradiation in the VISA-2 channel

  7. Reactor Neutrinos

    CERN Document Server

    Lasserre, T; Lasserre, Thierry; Sobel, Henry W.

    2005-01-01

    We review the status and the results of reactor neutrino experiments, that toe the cutting edge of neutrino research. Short baseline experiments have provided the measurement of the reactor neutrino spectrum, and are still searching for important phenomena such as the neutrino magnetic moment. They could open the door to the measurement of coherent neutrino scattering in a near future. Middle and long baseline oscillation experiments at Chooz and KamLAND have played a relevant role in neutrino oscillation physics in the last years. It is now widely accepted that a new middle baseline disappearance reactor neutrino experiment with multiple detectors could provide a clean measurement of the last undetermined neutrino mixing angle theta13. We conclude by opening on possible use of neutrinos for Society: NonProliferation of Nuclear materials and Geophysics.

  8. Evaluación de Riesgos Psicosociales en conductores de Altos Cargos de la Junta de Andalucía.

    OpenAIRE

    López-Zorzano, Fermín

    2013-01-01

    Este proyecto tiene por título “Evaluación de Riesgos Psicosociales en conductores de Altos cargos de la Junta de Andalucía”. Se trata de identificar los factores de riesgo y los niveles de riesgos asociados a estos, como puedan ser el estrés y los problemas asociados a éste, en los conductores de altos cargos de la Junta de Andalucía, para tratar de eliminarlos y poder establecer un programa de actuaciones, propuestas y medidas preventivas y/o correctivas para aquellos que no hayan podido el...

  9. El Alto - La Paz (Bolivia) : Las transformaciones socio territoriales del neoliberalismo y la derrota del movimiento obrero

    OpenAIRE

    Díaz, Mariela Paula

    2014-01-01

    La ciudad de El Alto, actualmente la segunda ciudad más grande de Bolivia luego de Santa Cruz, era un barrio periférico de la ciudad de La Paz hasta que se convierte en marzo de 1985 en capital de la cuarta sección de la provincia de Murillo del departamento de La Paz, y posteriormente en ciudad independiente en septiembre de 1988.Los informes gubernamentales y los periódicos actuales señalan que esta transformación de carácter político administrativo de El Alto se debe “al empuje de sus veci...

  10. Implantación de prácticas de recursos humanos en empresas manufactureras de alto rendimiento

    OpenAIRE

    Goñi Villegas, Iñaki

    2010-01-01

    Este proyecto aborda la posible implantación de prácticas de recursos humanos en empresas manufactureras denominadas de alto rendimiento (HPM, High Performance Manufacturing), mediante el estudio empírico de una encuesta realizada a 266 empresas de 9 países del mundo. El trabajo se enmarca en el proyecto “HPM Project-Spain: proyecto para la manufactura de alto rendimiento (High Performance Manufacturing)”, financiado por el Ministerio de Educación y Ciencia del Gobierno de España....

  11. Desarrollo de nuevas actividades docentes y de evaluación en asignaturas de alto contenido experimental

    OpenAIRE

    Moreno Pedraz, Pablo Manuel; Rodríguez Vázquez de Aldana, Javier; Conejero Jarque, Enrique

    2010-01-01

    El proyecto consistía en la elaboración de nuevas actividades docentes y de evaluación para una asignatura obligatoria del Máster en Física y Tecnología de los Láseres cuyo alto contenido experimental y su conexión con procesos industriales de alto contenido tecnológico, recomiendan una organización de las actividades docentes y de evaluación apartada de los modelos convencionales. Los objetivos específicos propuestos eran: - Introducir a los alumnos en un proceso de aprendizaje activo ...

  12. Procedimiento para obtener un producto prebiótico de alto contenido en fibra soluble, dicho producto y sus aplicaciones

    OpenAIRE

    Rupérez Antón, Pilar; Mateos-Aparicio, Inmaculada

    2008-01-01

    Procedimiento para obtener un producto prebiótico de alto contenido en fibra soluble, dicho producto y sus aplicaciones. La presente invención describe un procedimiento para obtener un producto prebiótico de alto contenido en fibra soluble a partir del uso de fibra insoluble proveniente de residuos vegetales y de la aplicación de altas presiones. Así sus aplicaciones son como suplemento dietético natural rico en fibra en alimentos utilizándose a residuos de soja, subpr...

  13. Morbimortalidad por Sangrado Digestivo Alto. Hospital Clínico Quirúrgico. Banes. Enero 2007_Diciembre 2008

    OpenAIRE

    Jorge Luís Pérez Jara; Lizandra Naranjo García; Antonio Ricardo García

    2011-01-01

    Se realizó un estudio descriptivo de corte transversal y retrospectivo para analizar la morbimortalidad por sangrado digestivo alto, de los casos atendidos en el servicio de cirugía del Hospital Clínico Quirúrgico de Banes, Holguín, motivados por la alta incidencia en nuestro territorio. La muestra estuvo conformada por los pacientes entre 15 a 65 años y más, se identificaron como principales causas de sangrado digestivo alto a la úlcera péptica crónica, las gastritis hemorrágicas por AINES y...

  14. Programa de educación participativa en el cuidado del recién nacido de alto riesgo

    OpenAIRE

    Lara Helena; Jiménez Gloria Teresa; González Fanny

    2010-01-01

    El programa de educación para padres de recién nacidos de alto riesgo está dirigido a los padres de aquellos niños que se encuentran hospitalizados en la Unidad Neonatal del Hospital Infantil Lorencita Villegas de Santos de Bogotá. Contiene aspectos relacionados con el cuidado general y específico del recién nacido de alto riesgo con el fin de hacer continua la atención en el hogar. Para el desarrollo de los temas del programa se utiliza la dinámica participativa como metodología de ...

  15. Valoración del deporte de alto rendimiento (gimnasia rítmica) en edades tempranas

    OpenAIRE

    Usero Gómez, Alba

    2014-01-01

    Comenzando por una introducción, en la cual se contextualiza el deporte y especialmente el de alto rendimiento, nos introduciremos en la cuestión de estudio, el deportista de élite y la preocupación por el comienzo en edades tempranas. Llevaremos a cabo este estudio, por medio de un análisis reflexivo de diversos autores y estudios que se sumergen en el deporte de alto rendimiento, especialmente en la infancia. Trataremos el objeto de estudio en relación a un deporte, la Gimnasia Rítmic...

  16. Nuclear reactors

    International Nuclear Information System (INIS)

    A nuclear reactor has a large prompt negative temperature coefficient of reactivity. A reactor core assembly of a plurality of fluid-tight fuel elements is located within a water-filled tank. Each fuel element contains a solid homogeneous mixture of 50-79 w/o zirconium hydride, 20-50 w/o uranium and 0.5-1.5 W erbium. The uranium is not more than 20 percent enriched, and the ratio of hydrogen atoms to zirconium atoms is between 1.5:1 and 7:1. The core has a long lifetime, E.G., at least about 1200 days

  17. Nuclear reactors

    International Nuclear Information System (INIS)

    In a liquid cooled nuclear reactor, the combination is described for a single-walled vessel containing liquid coolant in which the reactor core is submerged, and a containment structure, primarily of material for shielding against radioactivity, surrounding at least the liquid-containing part of the vessel with clearance therebetween and having that surface thereof which faces the vessel make compatible with the liquid, thereby providing a leak jacket for the vessel. The structure is preferably a metal-lined concrete vault, and cooling means are provided for protecting the concrete against reaching a temperature at which damage would occur. (U.S.)

  18. VIPRE modeling of VVER-1000 reactor core for DNB analyses

    International Nuclear Information System (INIS)

    Based on the one-pass modeling approach, the hot channels and the VVER-1000 reactor core can be modeled in 30 channels for DNB analyses using the VIPRE-01/MOD02 (VIPRE) code (VIPRE is owned by Electric Power Research Institute, Palo Alto, California). The VIPRE one-pass model does not compromise any accuracy in the hot channel local fluid conditions. Extensive qualifications include sensitivity studies of radial noding and crossflow parameters and comparisons with the results from THINC and CALOPEA subchannel codes. The qualifications confirm that the VIPRE code with the Westinghouse modeling method provides good computational performance and accuracy for VVER-1000 DNB analyses

  19. VIPRE modeling of VVER-1000 reactor core for DNB analyses

    Energy Technology Data Exchange (ETDEWEB)

    Sung, Y.; Nguyen, Q. [Westinghouse Electric Corporation, Pittsburgh, PA (United States); Cizek, J. [Nuclear Research Institute, Prague, (Czech Republic)

    1995-09-01

    Based on the one-pass modeling approach, the hot channels and the VVER-1000 reactor core can be modeled in 30 channels for DNB analyses using the VIPRE-01/MOD02 (VIPRE) code (VIPRE is owned by Electric Power Research Institute, Palo Alto, California). The VIPRE one-pass model does not compromise any accuracy in the hot channel local fluid conditions. Extensive qualifications include sensitivity studies of radial noding and crossflow parameters and comparisons with the results from THINC and CALOPEA subchannel codes. The qualifications confirm that the VIPRE code with the Westinghouse modeling method provides good computational performance and accuracy for VVER-1000 DNB analyses.

  20. Lixiviacion de concentrados de cobre con alto contenido en arsenico en medio cloro-cloruro

    OpenAIRE

    Herreros, O.; G. Fuentes; Quiroz, R.; Viñals Olia, Juan

    2003-01-01

    Se ha estudiado la lixiviación de concentrados de cobre con alto contenido de arsénico (hasta 2,5 %), mediante un proceso de oxidación con cloro formado 'in situ', por la reacción entre hipoclorito de sodio y ácido sulfúrico. El objetivo de estas experiencias es producir una solución de lixiviación, de características adecuadas para entrar a la etapa posterior de extracción por solventes (SX), es decir, entre 4 a 6 g/1 de cobre y 5 a 7 g/1 de ácido residual. Esta disolución, además, deberá co...

  1. Primeira Reportagem da Mosca Minadora em Cebola no Alto Paranaíba

    Directory of Open Access Journals (Sweden)

    Flávia Alves

    2014-12-01

    Abstract. Liriomyza spp. is considered pests in various crops in Brazil. The larvae mine the leaves cook up, reduce the photosynthetic area, cause wilting and premature leaf drop. The objective of this study report the first attack of Liriomyza spp., its damage and survival in onion (Allium cepa L. in Alto Parnaíba-MG. Their occurrence and injury ratings were detected in five of onion crops in 12 (50 plants/ha. Since survival was determined under conditions of controlled temperature. We observed the presence of Liriomyza spp. causing serpentine mines, with direct and negative relationship with the number of mines productivity, a loss of 120 kg ha-1 and survival rate of larva-pupa (57.89% and pupa-adult (63.63%. Thus, this phytophagous insect can become a serious pest in this crop.

  2. Sindicalismo da agricultura familiar e agroecologia no Alto Uruguai do RS

    Directory of Open Access Journals (Sweden)

    Everton Lazzaretti Picolotto

    2011-01-01

    Full Text Available Environmental concerns have influenced the political projects of family farmers’ organizations. The present paper aims to examine how these concerns were assimilated by the Federação dos Trabalhadores na Agricultura Familiar da região Sul (FETRAF-Sul in the Alto Uruguai in Rio Grande do Sul, mainly in setting the agenda of agroecology. A review about the process of building this agenda in the trade unionism was based on the consultation of documents produced by trade unions and their press offices, newspapers and interviews with farmers’ leaders. We decided to do a study about the town of Constantina-RS, where experiments have been carried out since the 1980s to assess how environmental issues have been internalized by unions in different periods.

  3. Pimelodus paranaensis, sp. n., um novo Pimelodidae (Pisces, Siluriformes) do Alto Paraná, Brasil

    OpenAIRE

    Heraldo A. Britski; Francisco Langeani

    1988-01-01

    Descreve-se Pimelodus paranaensis, sp. n., da bacia do Alto Paraná, Brasil, com base em 20 exemplares. A nova espécie pode ser assim diagnosticada: (i) dentes presentes e formando duas áreas isoladas no vômer; (ii) faixa pré-maxilar de dentes com um ângulo projetado para trás; (iii) teto do crânio coberto por pele fina; (iv) comprimento da nadadeira adiposa 3,9 a 4,3 vezes no comprimento padrão; (v) a maior altura da nadadeira adiposa 3,1 a 4.3 vezes no seu comprimento; (vi) região dorsal do ...

  4. DEVELOPMENT OF A NEW SURFACE ION-SOURCE AND ION GUIDE IN THE ALTO PROJECT

    OpenAIRE

    Cuong, P. V.

    2010-01-01

    Pour le projet ALTO à l'IPN d'Orsay, comme pour d'autres laboratoires qui exploitent la technique ISOL pour produire des faisceaux radioactifs intenses et purs, il est crucial, lorsque des isotopes de courte durée de vie sont produits dans des cibles épaisses, de réaliser des cibles et des sources d'ions avec des bonnes propriétés de sortie et de haute efficacité. Ainsi les études de R&D sur les cibles et les sources d'ions sont très importantes pour l'optimisation de la production, la sélect...

  5. Photo-fission for the production of radioactive beams ALTO project

    International Nuclear Information System (INIS)

    In order to probe neutron rich radioactive noble gases produced by photo-fission, a PARRNe-1 experiment (Production d'Atomes Radioactifs Riches en Neutrons) has been carried out at CERN. The incident electron beam of 50 MeV was delivered by the LIL machine: LEP Injector Linac. The experiment allowed us to compare under the same conditions two production methods of radioactive noble gases: fission induced by fast neutrons and photo-fission. The obtained results show that the use of the electrons is a promising mode to get intense neutron rich ion beams. After the success of this photo-fission experiment, a conceptual design for the installation at IPN Orsay of a 50 MeV electron accelerator close to the PARRNe-2 device has been worked out: ALTO Project. This work has started within a collaboration between IPNO, LAL (Laboratoire de l'Accelerateur Lineaire) and CERN groups

  6. Tratamento do paciente com mielodisplasia de alto risco Treatment of myelodysplastic syndrome in high risk patients

    OpenAIRE

    Evandro M. Fagundes

    2006-01-01

    O tratamento do paciente com mielodisplasia deve ser feito considerando o risco biológico da doença, a idade e as condições clínicas do paciente. De um modo geral, uma doença de alto risco necessitaria de um tratamento mais agressivo. Porém, devido à elevada idade mediana no diagnóstico, a maioria dos pacientes não tolera tratamentos intensivos. O transplante de células-tronco hematopoiéticas é a única opção para aqueles que objetivam a cura da doença. Para aqueles que não podem se submeter a...

  7. Desarrollo rural y deterioro del bosque. Región interestatal del Alto Lerma

    Directory of Open Access Journals (Sweden)

    María Estela Orozco-Hernández

    2009-01-01

    Full Text Available Esta investigación analiza las condiciones naturales y socioeconómicas de la región interestatal Alto Lerma, mediante una evaluación diagnóstica de las fortalezas, oportunidades, debilidades y amenazas que afectan la utilización de las áreas que corresponden a bosques templados. Se aportan elementos para repensar las formas de intervención y apropiación de los recursos forestales y se proponen estrategias para la atención social y ambiental de las comunidades rurales. Se analizó información cartográfica, estadística y documental, así como la obtenida por medio de entrevistas proporcionadas por funcionarios públicos.

  8. Biometria no crescimento do olho alto míope na infância

    OpenAIRE

    Adriana Miranda de Magalhães Franco; Yara Cristina Lopes; Paulo Henrique de Souza; Norma Allemann

    2013-01-01

    OBJETIVO: Determinar se o crescimento do globo ocular mensurado através da biometria óptica e ultrassônica em uma população pediátrica de altos míopes é significante, assim como variação significante da espessura do cristalino, profundidade da câmara anterior, curvatura corneana e achados fundoscópicos durante o acompanhamento. MÉTODOS: Uma população pediátrica (idade média: 8,7anos), 11 olhos de crianças portadoras de alta miopia (refração média inicial: -11,28D) foi submetida a avaliação se...

  9. Identidades en movimiento: familias chilenas en la fruticultura del Alto Valle de Río Negro, Argentina Identities in movement: chilean families in the fruit production of the Alto Valle de Río Negro, Argentina

    Directory of Open Access Journals (Sweden)

    Verónica Trpin

    2007-12-01

    Full Text Available Este artículo, basado en el trabajo de campo realizado en áreas rurales del Alto Valle de Río Negro, Argentina, desde el año 1999, tiene como propósito presentar las relaciones en las cuales se insertan hombres y mujeres chilenas que residen y trabajan en "chacras" destinadas a la producción frutícola. Las diferentes actividades en las chacras se organizan según el sexo y la edad, definiéndose una segmentación del mercado de trabajo en la que se ven involucrados los diferentes miembros de la familia. Como desarrollaré, ser trabajadores chilenos en la fruticultura del Alto Valle de Río Negro reproduce una identidad étnica y nacional en el seno de la cotidianeidad familiar y laboral.This article, based on field work conducted in rural areas of the Alto Valle de Río Negro, Argentina, from 1999 on, analyzes the relations in which Chilean men and women who reside and work in small farms destined to fruit production are inserted. The different activities in the small farms are organized according to sex and age, circumscribing a segment of the labor market in which different members of the family are involved. As I will demonstrate, to be a Chilean worker in the fruit growing region of the Alto Valle is to reproduce an ethnic and national identity through work routines mediated by family relations.

  10. Dermatological remedies in the traditional pharmacopoeia of Vulture-Alto Bradano, inland southern Italy

    Directory of Open Access Journals (Sweden)

    Bennett Bradley C

    2008-02-01

    Full Text Available Abstract Background Dermatological remedies make up at least one-third of the traditional pharmacopoeia in southern Italy. The identification of folk remedies for the skin is important both for the preservation of traditional medical knowledge and in the search for novel antimicrobial agents in the treatment of skin and soft tissue infection (SSTI. Our goal is to document traditional remedies from botanical, animal, mineral and industrial sources for the topical treatment of skin ailments. In addition to SSTI remedies for humans, we also discuss certain ethnoveterinary applications. Methods Field research was conducted in ten communities in the Vulture-Alto Bradano area of the Basilicata province, southern Italy. We randomly sampled 112 interviewees, stratified by age and gender. After obtaining prior informed consent, we collected data through semi-structured interviews, participant-observation, and small focus groups techniques. Voucher specimens of all cited botanic species were deposited at FTG and HLUC herbaria located in the US and Italy. Results We report the preparation and topical application of 116 remedies derived from 38 plant species. Remedies are used to treat laceration, burn wound, wart, inflammation, rash, dental abscess, furuncle, dermatitis, and other conditions. The pharmacopoeia also includes 49 animal remedies derived from sources such as pigs, slugs, and humans. Ethnoveterinary medicine, which incorporates both animal and plant derived remedies, is addressed. We also examine the recent decline in knowledge regarding the dermatological pharmacopoeia. Conclusion The traditional dermatological pharmacopoeia of Vulture-Alto Bradano is based on a dynamic folk medical construct of natural and spiritual illness and healing. Remedies are used to treat more than 45 skin and soft tissue conditions of both humans and animals. Of the total 165 remedies reported, 110 have never before been published in the mainland southern Italian

  11. Wine and cultural heritage. The experience of the Alto Douro Wine Region

    Directory of Open Access Journals (Sweden)

    Lina Lourenço-Gomes

    2015-12-01

    Full Text Available The Demarcated Douro Region is one of the oldest demarcated wine regions, and the largest and the most heterogeneous mountainous wine region in the world. Viticulture covers 44,000 ha, and since 2001 an area covering 24,600 ha has been designated as the most representative territory of the Demarcated Douro Region, the Alto Douro Wine Region. This region is included in the list of World Heritage Sites as an evolving and living cultural landscape. The Demarcated Douro Region fits the terroir model, as its economy is based on wine (Porto wine and Douro still wines, supplemented by tourism. During recent decades, both activities have witnessed deep and structural changes, with consequences for the maintenance of the traditional characteristics of the cultural landscape that drove the UNESCO classification. With this issue in mind, the goal of this paper is to describe the recent evolution of the main economic activities of the Demarcated Douro Region. In particular, we aim to deepen the knowledge about the preferences of Portuguese visitors towards the Alto Douro Wine Region and its attributes, thus determining those that deserve preservation and, consequently, public attention. The results of a mixed logit model show that visitors assign highest utility to the preservation of vineyards supported by schist walls, followed by the agglomerations and the characteristic mosaic nature of the landscape. Additionally, respondents who are richer, employed, better educated, better informed regarding the culture of the site and more influenced by the listing are more willing to participate in preserving the cultural heritage of the region.

  12. Situación estimada de la zona cohesiva en el horno alto

    Directory of Open Access Journals (Sweden)

    Cores, A.

    2010-08-01

    Full Text Available A series of sinters are manufactured in the pilot plant, using a mineral mixture, like that blast furnace. The sinters are characterised, by chemical and granulometric analysis and by determining the softening and melting temperatures. In the blast furnace temperatures are determined by using a series of probes in the furnace which make it possible to locate the position of the isotherm of higher temperature of 950°C, which correspond to the reserve thermic zone. A model has been developed, proposing and indirect estimation of the shape of the cohesive zone through the determination of the isotherm with the highest temperature in the thermic reserve zone. The values of the softening and melting temperatures of sinters can be used to estimate the isotherms limiting the cohesive zone in the 1300-1400 °C range.

    En planta piloto se fabrica una serie de sinterizados a partir de mezclas minerales como las utilizadas en el horno alto. Se caracterizan los sinterizados mediante análisis químico y granulométrico y determinación de las temperaturas de reblandecimiento y fusión. En el horno alto, mediante una serie de sondas, se determinan las temperaturas en el horno, lo que permite situar la posición de la isoterma de mayor temperatura de 950 °C, que corresponde a la zona de reserva térmica. Se ha desarrollado un modelo que propone una estimación indirecta de la forma de la zona cohesiva a través de la determinación de la isoterma de mayor temperatura de la zona de reserva térmica. Los valores de las temperaturas de reblandecimiento y fusión de los sinterizados permiten estimar las isotermas que limitan la zona cohesiva, en el intervalo de 1.300-1.400 °C.

  13. Nuclear reactor

    International Nuclear Information System (INIS)

    In an improved reactor core for a high conversion BWR reactor, Pu-breeding type BWR type reactor, Pu-breeding type BWR type rector, FEBR type reactor, etc., two types of fuel assemblies are loaded such that fuel assemblies using a channel box of a smaller irradiation deformation ratio are loaded in a high conversion region, while other fuel assemblies are loaded in a burner region. This enables to suppress the irradiation deformation within an allowable limit in the high conversion region where the fast neutron flux is high and the load weight from the inside of the channel box due to the pressure loss is large. At the same time, the irradiation deformation can be restricted within an allowable limit without deteriorating the neutron economy in the burner region in which fast neutron flux is low and the load weight from the inside of the channel box is small since a channel box with smaller neutron absorption cross section or reduced wall thickness is charged. As a result, it is possible to prevent structural deformations such as swelling of the channel box, bending of the entire assemblies, bending of fuel rods, etc. (K.M.)

  14. Estudio de viabilidad creación de empresa Auditores e Interventores del Alto Magdalena E.U.

    OpenAIRE

    Masmela Peñaloza, Sara Liliana; Quiroga Forero, Sara Liliana; Sánchez Miranda, Doris Yaneth

    2010-01-01

    Realización de un análisis técnico financiero para la creación de una empresa que preste servicios de auditoría e interventoría en la región del alto magdalena en entidades prestadoras de servicios de salud y entes territoriales

  15. Buurtconsolidatie en urbane transformatie in El Alto : Een longitudinaal onderzoek naar veranderingsprocessen in de voormalige periferie van La Paz, Bolivia

    NARCIS (Netherlands)

    Kranenburg, Ronald Hendrik

    2003-01-01

    This study is about the influence of the processes of neighbourhood consolidation and urban transformation in three self-help neighbourhoods in El Alto, a city on Bolivia’s plateau, adjacent the capital city of La Paz. Special attention was paid to the developments in the housing conditions, land us

  16. Entre aromas de incienso y pólvora : Los Altos de Jalisco, México, 1917-1940

    NARCIS (Netherlands)

    López Ulloa, José Luis

    2008-01-01

    This thesis focuses on the Mexican Revolution and on the opposition strategies followed by the opponents of the revolutionary regime who lived in the region known as Los Altos de Jalisco. In this particular region, the Catholic population, supported by the Clergy, was in constant conflict with the r

  17. Reactor container

    International Nuclear Information System (INIS)

    A reactor container has a suppression chamber partitioned by concrete side walls, a reactor pedestal and a diaphragm floor. A plurality of partitioning walls are disposed in circumferential direction each at an interval inside the suppression chamber, so that independent chambers in a state being divided into plurality are formed inside the suppression chamber. The partition walls are formed from the bottom portion of the suppression chamber up to the diaphragm floor to isolate pool water in a divided state. Operation platforms are formed above the suppression chamber and connected to an access port. Upon conducting maintenance, inspection or repairing, a pump is disposed in the independent chamber to transfer pool water therein to one or a plurality of other independent chambers to make it vacant. (I.N.)

  18. Reactor building

    International Nuclear Information System (INIS)

    The present invention concerns a structure of ABWR-type reactor buildings, which can increase the capacity of a spent fuel storage area at a low cost and improved earthquake proofness. In the reactor building, the floor of a spent fuel pool is made flat, and a depth of the pool water satisfying requirement for shielding is ensured. In addition, a depth of pool water is also maintained for a equipment provisionally storing pool for storing spent fuels, and a capacity for a spent fuel storage area is increased by utilizing surplus space of the equipment provisionally storing pool. Since the flattened floor of the spent fuel pool is flushed with the floor of the equipment provisionally storing pool, transfer of horizontal loads applied to the building upon occurrence of earthquakes is made smooth, to improve earthquake proofness of the building. (T.M.)

  19. Nuclear reactors

    International Nuclear Information System (INIS)

    Disclosed is a nuclear reactor cooled by a freezable liquid has a vessel for containing said liquid and comprising a structure shaped as a container, and cooling means in the region of the surface of said structure for effecting freezing of said liquid coolant at and for a finite distance from said surface for providing a layer of frozen coolant on and supported by said surface for containing said liquid coolant. In a specific example, where the reactor is sodium-cooled, the said structure is a metal-lined concrete vault, cooling is effected by closed cooling loops containing NaK, the loops extending over the lined surface of the concrete vault with outward and reverse pipe runs of each loop separated by thermal insulation, and air is flowed through cooling pipes embedded in the concrete behind the metal lining. 7 claims, 3 figures

  20. NEUTRONIC REACTORS

    Science.gov (United States)

    Anderson, J.B.

    1960-01-01

    A reactor is described which comprises a tank, a plurality of coaxial steel sleeves in the tank, a mass of water in the tank, and wire grids in abutting relationship within a plurality of elongated parallel channels within the steel sleeves, the wire being provided with a plurality of bends in the same plane forming adjacent parallel sections between bends, and the sections of adjacent grids being normally disposed relative to each other.

  1. Nuclear reactor

    International Nuclear Information System (INIS)

    The liquid metal (sodium) cooled fast breeder reactor has got fuel subassemblies which are bundled and enclosed by a common can. In order to reduce bending of the sides of the can because of the load caused by the coolant pressure the can has got a dodecagon-shaped crosssection. The surfaces of the can may be of equal width. One out of two surfaces may also be convex towards the center. (RW)

  2. Nuclear reactor

    International Nuclear Information System (INIS)

    A detector having high sensitivity to fast neutrons and having low sensitivity to thermal neutrons is disposed for reducing influences of neutron detector signals on detection values of neutron fluxes when the upper end of control rod pass in the vicinity of the neutron flux detector. Namely, the change of the neutron fluxes is greater in the thermal neutron energy region while it is smaller in the fast neutron energy region. This is because the neutron absorbing cross section of B-10 used as neutron absorbers of control rods is greater in the thermal neutron region and it is smaller in the fast neutron region. As a result, increase of the neutron detection signals along with the local neutron flux change can be reduced, and detection signals corresponding to the reactor power can be obtained. Even when gang withdrawal of operating a plurality of control rods at the same time is performed, the reactor operation cycle can be measured accurately, thereby enabling to shorten the reactor startup time. (N.H.)

  3. Estudio preliminar de la fauna Amphibia del valle de Sibundoy, Alto Putumayo, Colombia

    Directory of Open Access Journals (Sweden)

    Mueses-Cisneros Jonh Jairo

    2004-12-01

    Full Text Available Se realiza el estudio preliminar de la fauna Amphibia del Valle de Sibundoy, Alto Putumayo, Colombia; mediante la construcción del inventario de la fauna Amphibia, el mejoramiento en el conocimiento
    de la distribución en los Andes norecuatorianos y surcolombianos de las especies involucradas y la relación en cuanto a la composición de esta fauna con la de los estudios realizados en el transecto Napo en Ecuador y transecto Montañita-Alto Gabinete en Caquetá. El estudio se basó en: 1 tres salidas de campo al Valle de Sibundoy (localizado al suroccidente de Colombia, entre 1º 05’ y 1º 12’ N y 76º 53’ y 77º 00’ O entre 2.000-2.750 msnm, realizadas en diciembre 2000-enero 2001, julio 2002 y diciembre 2003-febrero 2004, con un esfuerzo de muestreo de 198 horas/hombre; 2 revisión bibliográfica; 3 revisión de especímenes depositados en la colección de anfibios del Instituto de Ciencias Naturales de la Universidad Nacional de Colombia, Sede Bogotá (ICN y en la revisión de la base de datos de la colección de Herpetología del Instituto de Investigaciones Alexander von Humboldt (IAvH de los anfibios colectados en los departamentos de Caquetá, Nariño, Putumayo y en Ecuador. La fauna consta de 32 especies (313 especímenes agrupadas en dos órdenes, cinco familias y siete géneros; para cada especie se presenta información
    sobre su historial taxonómico, reconocimiento, distribución geográfica (mapas de distribución y rangos altitudinales, coloración en vivo y en preservativo, abundancia y algunos aspectos relacionados con su historia natural; se realiza un análisis regional de esta fauna a nivel general
    (Valle de Sibundoy y por localidades muestreadas, se hace una comparación con las faunas realizadas en el transecto Napo en Ecuador y en el transecto Montañita-Alto Gabinete en Caquetá y se presenta una clave taxonómica y una serie de fotografías para facilitar su  reconocimiento. El estudio adem

  4. Adsorción de metales pesados sobre lodos de horno alto

    Directory of Open Access Journals (Sweden)

    López-Delgado, A.

    1998-05-01

    Full Text Available Most of industrial liquid effluents have high contents of heavy metals. The recovery of these metals is environmental and economically interesting. In this work we study the use of sludge, a by-product of the steel industry, as an adsorbent for the removal of heavy metals from liquid effluents. The adsorption of Pb2+, Zn2+, Cd2+, Cu2+ and Cr3+ on the sludge was investigated by determination of adsorption isotherms. The effect of time, equilibrium temperature and concentration of metal solution on sludge adsorption efficiency was evaluated. The adsorption process was analysed using the theories of Freundlich and Langmuir and the thermodynamic values ΔG, ΔH and ΔS corresponding to each adsorption process were calculated. Blast furnace sludge was found to be an effective sorbent for Pb, Zn, Cd, Cu and Cr-ions within the range of ion concentrations employed.

    Los efluentes líquidos de la mayoría de los procesos industriales contienen una carga importante de metales pesados que, por motivos tanto económicos como medioambientales interesa recuperar. En este trabajo, se estudia la utilización de lodos procedentes de la depuración por vía húmeda de los gases de horno alto como soporte para la retención de metales pesados contenidos en efluentes líquidos. La adsorción de Pb2+, Zn2+, Cd2+, Cu2+ y Cr3+ sobre el lodo de horno alto se determina mediante la obtención de las isotermas de adsorción, variando la concentración de las soluciones metálicas y analizando la influencia del tiempo y de la temperatura de equilibrio en la capacidad de adsorción del lodo. Para describir el proceso de adsorción se consideraron las teorías de Freundlich y Langmuir y, posteriormente, se calcularon los valores termodinámicos ΔG, ΔH y ΔS, correspondientes a cada proceso de adsorción. Para todos

  5. Reactor core of nuclear reactor

    International Nuclear Information System (INIS)

    In a BWR type nuclear reactor, the number of first fuel assemblies (uranium) loaded in a reactor core is smaller than that of second fuel assemblies (mixed oxide), the average burnup degree upon take-out of the first fuel assemblies is reduced to less than that of the second fuel assemblies, and the number of the kinds of the fuel rods constituting the first fuel assemblies is made smaller than that of the fuel rods constituting the second fuel assemblies. As a result, the variety of the plutonium enrichment degree is reduced to make the distribution of the axial enrichment degree uniform, thereby enabling to simplify the distribution of the enrichment degree. Then the number of molding fabrication steps for MOX fuel assemblies can be reduced, thereby enabling to reduce the cost for molding and fabrication. (N.H.)

  6. Types of Nuclear Reactors

    International Nuclear Information System (INIS)

    The presentation is based on the following areas: Types of Nuclear Reactors, coolant, moderator, neutron spectrum, fuel type, pressurized water reactor (PWR), boiling water reactor (BWR) reactor pressurized heavy water (PHWR), gas-cooled reactor, RBMK , Nuclear Electricity Generation,Challenges in Nuclear Technology Deployment,EPR, APR1400, A P 1000, A PWR, ATMEA 1, VVER-1000, A PWR, VVER 1200, Boiling Water Reactor, A BWR, A BWR -II, ESBUR, Ke ren, AREVA, Heavy Water Reactor, Candu 6, Acr-1000, HWR, Bw, Iris, CAREM NuCcale, Smart, KLT-HOS, Westinghouse small modular Reactor, Gas Cooled Reactors, PBMR.

  7. Nuclear reactor

    International Nuclear Information System (INIS)

    A nuclear reactor is described in which the core components, including fuel-rod assemblies, control-rod assemblies, fertile rod-assemblies, and removable shielding assemblies, are supported by a plurality of separate inlet modular units. These units are referred to as inlet module units to distinguish them from the modules of the upper internals of the reactor. The modular units are supported, each removable independently of the others, in liners in the supporting structure for the lower internals of the reactor. The core assemblies are removably supported in integral receptacles or sockets of the modular units. The liners, units, sockets and assemblies have inlet openings for entry of the fluid. The modular units are each removably mounted in the liners with fluid seals interposed between the opening in the liner and inlet module into which the fluid enters in the upper and lower portion of the liner. Each assembly is similarly mounted in a corresponding receptacle with fluid seals interposed between the openings where the fluid enters in the lower portion of the receptacle or fitting closely in these regions. As fluid flows along each core assembly a pressure drop is produced along the fluid so that the fluid which emerges from each core assembly is at a lower pressure than the fluid which enters the core assembly. However because of the seals interposed in the mountings of the units and assemblies the pressures above and below the units and assemblies are balanced and the units are held in the liners and the assemblies are held in the receptacles by their weights as they have a higher specific gravity than the fluid. The low-pressure spaces between each module and its liner and between each core assembly and its module is vented to the low-pressure regions of the vessel to assure that fluid which leaks through the seals does not accumulate and destroy the hydraulic balance

  8. Selección recíproca recurrente en poblaciones de maíz de valles altos en suelos con alto y bajo contenido de nitrógeno, en México

    OpenAIRE

    Esaú del Carmen Moreno Pérez; David Beck Lewis; Tarcicio Cervantes Santana; José L. Torres Flores

    2004-01-01

    El objetivo de este trabajo fue evaluar los efectos de dos ciclos de selección recíproca recurrente realizados en las poblaciones 902 (A) y 903 (B) de maíz (Zea mays L.), de Valles Altos, México, provenientes del Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), en suelos con alto y bajo contenido de nitrógeno. Con los ciclos 0, 1 y 2 de selección en las poblaciones A y B se formaron nueve cruzas Ai×Bj (i, j= ciclo 0, 1, 2). La generación F2 del ciclo i de la población A y del ci...

  9. Nuclear research reactors

    International Nuclear Information System (INIS)

    It's presented data about nuclear research reactors in the world, retrieved from the Sien (Nuclear and Energetic Information System) data bank. The information are organized in table forms as follows: research reactors by countries; research reactors by type; research reactors by fuel and research reactors by purpose. (E.G.)

  10. Nuclear reactor physics course for reactor operators

    International Nuclear Information System (INIS)

    The education and training of nuclear reactor operators is important to guarantee the safe operation of present and future nuclear reactors. Therefore, a course on basic 'Nuclear reactor physics' in the initial and continuous training of reactor operators has proven to be indispensable. In most countries, such training also results from the direct request from the safety authorities to assure the high level of competence of the staff in nuclear reactors. The aim of the basic course on 'Nuclear Reactor Physics for reactor operators' is to provide the reactor operators with a basic understanding of the main concepts relevant to nuclear reactors. Seen the education level of the participants, mathematical derivations are simplified and reduced to a minimum, but not completely eliminated

  11. The Interactive Dimension of Communication: The Pragmatics of the Palo Alto Group

    Directory of Open Access Journals (Sweden)

    Codruţa Porcar

    2011-11-01

    Full Text Available Our paper proposes to analyze from a semiotic perspective the process of communication as conceived within the Palo Alto Group. We will firstly show that, as a result of the Group's critiques and revisions of the linear or mechanistic theories of communication, new perspectives are brought about for the essential axes of transformation within communication: we do not communicate as from a distinct atom to another, through an isolated channel, but through parts which are equal to the whole, the whole itself being equal to the parts. This approach has been characterized as “organicist”, and communication is now studied and understood as a dynamic process where the relationship between the elements is of prime importance. Reciprocal inclusion replaces the discursive aspects of communication and expression replaces representation. The reference point is thus situated beyond the mechanical parts of a whole ready to be dis- and reassembled. We conclude that through this perspective on communication, the notion of interaction between partners and between codes becomes a capital one and that, in this point, semiotics intersects with disciplines such as conversational analysis and the ethnography of communication.

  12. "Grupos parque". Grupos de padres de bebés y alto riesgo.

    Directory of Open Access Journals (Sweden)

    Gonzalo Morandé Lavín

    1984-01-01

    Full Text Available Una unidad de nuestro equipo inició su trabajo en bebés en 1978. Inicialmente observando recién nacidos normales y luego aquellos que eran ingresados a las pocas horas o días de nacer por diferentes entidades clínicas. Se definió junto a los neonatólogos el concepto de alto riesgo, entendiendo dicho término como aquellos bebés que por sus alteraciones psiconeurológicas en el primer mes de vida tenían altas posibilidades de presentar un desarrollo psicológico disarmónico, enlentecido o deficitario. Progresivamente el concepto se amplió al incorporar criterios relacionales precoces, la capacidad materna y de la familia para hacer frente a la situación. Las primeras experiencias fueron de seguimiento de estos niños y sus familias y paulatinamente se fueron incorporando pautas de observación de la interacción, así como de estimulación temprana siempre desde un enfoque vincular y familiar.

  13. Reporte de cuatro casos clínicos de filariasis en Alto Nanay, Loreto

    Directory of Open Access Journals (Sweden)

    Javier Vargas-Herrera

    2013-07-01

    Full Text Available El presente estudio describe los hallazgos clínicos, parasitológicos y de laboratorio de cuatro pacientes residentes en el distrito de Alto Nanay, Maynas, Loreto, Perú; infectados con microfilarias de Mansonella ozzardi. La evaluación clínica incluyó las especialidades de oftalmología, cardiología y nefrología. En el caso 1, destaca la presencia de dos tumoraciones subcutáneas, una a nivel dorsal y la otra en el tercio inferior de la pierna izquierda; en el caso 2, la sensación de “hormigueo o frío en las piernas”; en el caso 3 se encontró asociada una infección crónica por hepatitis B y en el caso 4 una tumoración de gran tamaño en región lumbar izquierda. En los cuatro pacientes se encontró Mansonella ozzardi y eosinofilia, tres presentaron valores mayores a 20%. La tumoración en el caso 4 correspondió a una hernia de contenido intestinal. Es necesario ejecutar más estudios clínicos y evaluar su verdadero efecto patógeno, es también pertinente estudiar la diversidad genética de filarias de la Amazonia peruana.

  14. Las galerías filtrantes del Alto Lerma: usos y manejos sociales

    Directory of Open Access Journals (Sweden)

    Roberto Montes-Hernández

    2011-01-01

    Full Text Available La ubicación y estudio del manejo social del agua de las galerías filtrantes en el Estado de México no se ha realizado porque se ignora la existencia de este sistema hidráulico. En el presente artículo se informa por primera vez la georreferenciación y descripción del uso y manejo social del agua de las galerías filtrantes del Alto Lerma. Con base en trabajo de campo, revisión de archivos y etnografía, se verifica y describe la existencia de dicho sistema en esta región. El desarrollo de este trabajo es parte de una investigación más amplia, denominada "Caracterización del uso y manejo social del agua de las galerías filtrantes en el Estado de México", bajo la supervisión de Tonatiuh Romero.

  15. Estimation of forest attributes by integration of inventory and remotely sensed data in Alto Molise

    Directory of Open Access Journals (Sweden)

    Ugo Chiavetta

    2008-01-01

    Full Text Available Forest ecosystems for their important multifunctional value, need a complex and increasing amount of descriptive information to support their management. Ecological and environmental related attributes have became nowadays important as traditional ones, such as wood growing stock and basal area. The correct application of Sustainable Forest Management criteria is boosted by spatial contiguous knowledge of such attributes. For such a reason in the last years a huge number of scientific experiences in the forest area have been concentrated to study the relationship between data acquired in the field and remotely sensed multispectral images. Models based on such relationships can be used to estimate and map forest attributes acquired in the field on the basis of a statistical sampling design. can be sucould not take in consideration spatially structured data. In last years many researches have focused on possible relationships between field data and remote sensed informations derived from multispectral imagery. Modeling these relationships allows to extend inventory data to not explored surfaces. In this paper were discussed results on spatializing forest biometrical attributes, tree heterogeneity and dimensional heterogeneity assessed during an inventory of Mountain Community “Alto Molise” (IS throw Spot 5 and Lansat TM 7 imagery. For this purpose a multilinear regression and a k-Nearest Neighbor classifier were used.

  16. CALIFA, the Calar Alto Legacy Integral Field Area survey: II. First public data release

    CERN Document Server

    Husemann, B; Sánchez, S F; Barrado-Navascues, D; Bekeraitė, S; Bomans, D J; Castillo-Morales, A; Catalán-Torrecilla, C; Fernandes, R Cid; Falcón-Barroso, J; García-Benito, R; Delgado, R M González; Iglesias-Páramo, J; Johnson, B D; Kupko, D; López-Fernandez, R; Lyubenova, M; Marino, R A; Mast, D; Miskolczi, A; Monreal-Ibero, A; de Paz, A Gil; Pérez, E; Pérez, I; Rosales-Ortega, F F; Ruiz-Lara, T; Schilling, U; van de Ven, G; Walcher, J; Alves, J; de Amorim, A L; Backsmann, N; Barrera-Ballesteros, J K; Bland-Hawthorn, J; Dettmar, R -J; Demleitner, M; Díaz, A I; Enke, H; Florido, E; Flores, H; Galbany, L; Gallazzi, A; García-Lorenzo, B; Gomes, J M; Gruel, N; Haines, T; Holmes, L; Jungwiert, B; Kalinova, V; Kehrig, C; Kennicutt, R C; Klar, J; Lehnert, M D; Lóez-Sáchez, Á R; de Lorenzo-Cáceres, A; Mármol-Queraltó, E; Márquez, I; Mendez-Abreu, J; Mollá, M; del Olmo, A; Meidt, S E; Papaderos, P; Puschnig, J; Quirrenbach, A; Roth, M M; Sánchez-Blázquez, P; Spekkens, K; Singh, R; Stanishev, V; Trager, S C; Vilchez, J M; Wild, V; Wisotzki, L; Zibetti, S; Ziegler, B

    2012-01-01

    We present the first public data release of the CALIFA survey. It consists of science-grade optical datacubes for the first 100 of eventually 600 nearby (0.005Alto observatory. The galaxies in DR1 already cover a wide range of properties in color-magnitude space, morphological type, stellar mass, and gas ionization conditions. This offers the potential to tackle a variety of open questions in galaxy evolution using spatially resolved spectroscopy. Two different spectral setups are available for each galaxy, (i) a low-resolution V500 setup covering the nominal wavelength range 3745-7500A with a spectral resolution of 6.0A (FWHM), and (ii) a medium-resolution V1200 setup covering the nominal wavelength range 3650-4840A with a spectral resolution of 2.3A (FWHM). We present the characteristics and data structure of the CALIFA datasets that should be taken into account for scientific exploita...

  17. INSTRUMENTOS DE PROMOCIÓN DE LOS VINOS EN LOS RESTAURANTES DE ALTO NIVEL

    Directory of Open Access Journals (Sweden)

    Gil Saura, I.

    2009-01-01

    Full Text Available En los últimos años, la comercialización de vinos está adquiriendo un peso creciente en los establecimientos de restauración. El aumento en la complejidad de la oferta de vinos determina que la elección del consumidor esté condicionada por la oferta presente en la carta y por la influencia del personal de sala. El objetivo del presente trabajo es identificar y caracterizar los instrumentos relevantes de promoción de los vinos que utilizan los restaurantes, en función de la presencia de personal formado en vinos. Como resultado de un estudio realizado para una muestra de restaurantes de alto nivel, observamos que el contenido y el diseño de la carta de vinos se encuentran en granmedida condicionados por la presencia de sumiller, constituyéndose ambos en instrumentos básicos de promoción de los vinos en el restaurante.

  18. EL LIDERAZGO ÉTNICO EN ATACAMA, ALTOS DE ARICA, TACNA Y TARATA (SIGLO XVIII

    Directory of Open Access Journals (Sweden)

    Jorge Hidalgo Lehuedé

    2004-09-01

    Full Text Available En este artículo realizamos un análisis comparado de las dinámicas y transformaciones que experimentó el liderazgo étnico de los cacicazgos de Atacama, Codpa, Altos de Arica, Tacna y Tarata, durante el siglo XVIII. Sostenemos, además, que las dinámicas del liderazgo étnico se ajustaron, más que a proyectos comunitarios, a estrategias familiares. Estas últimas debieron enfrentarse a condiciones sociales de posibilidad en las que se entremezclaron las limitaciones, las demandas y las oportunidades que les ofrecía el campo social colonialIn this article we will realice a comparative analysis of the dynamic and transformations that experienced the ethnic leadership of the Atacama, Codpa, Tacna and Tarata chiefdom, during 18th century. We support, beside, that the ethnic leadership dynamics adjusted more to a family strategy than a communitary project. This family strategy should face a social conditions of possibilities, just a mixture of limitation, demands and opportunities that the colonial society offer them

  19. The crust role at Paramillos Altos intrusive belt: Sr and Pb isotope evidence

    International Nuclear Information System (INIS)

    Paramillos Altos Intrusive Belt (PAIB) (Ostera, 1996) is located in the thick skinned folded-thrust belt of Malargue, southwestern Mendoza, Argentina. Geochemical, geochronologic and isotopic studies were carried out in it (Ostera 1996, 1997, Ostera et al. 1999; Ostera et al. 2000) and these previous papers suggested a minor involvement of the crust in the genesis of the PAIB. According with Ostera et al. (2000) it is composed by stocks, laccoliths, dykes and sills which range in composition from diorites to granodiorites, and from andesites to rhyolites, and divided in five Members, which range in age from Middle Miocene to Early Miocene: a- Calle del Yeso Dyke Complex (CYDC), with sills and dykes of andesitic composition (age: 20±2 Ma). b- Puchenque-Atravesadas Intrusive Complex (PAIC), composed by dykes and stocks ranging from diorites to granodiorites (age: 12.5±1 Ma). c- Arroyo Serrucho Stock (SAS), an epizonal and zoned stock, with four facies, with K/Ar and Ar/Ar dates of 10±1 and 9.5±0.5 Ma. d- Portezuelo de los Cerros Bayos (PCB), that includes porphyritic rocks of rhyolitic composition, of 7.5±0.5 Ma. e- Cerro Bayo Vitrophyres (CBV), with andesitic sills and dykes (age: 4.8±0.2 Ma). We present in this paper new Sr and Pb isotopes data that constrain the evolution of the PAIB (au)

  20. La frontera a alto corrimiento al rojo historia de la formacion de las galaxias

    CERN Document Server

    Miralda-Escudé, J

    1999-01-01

    This review presents a brief discussion of the theory of Cold Dark Matter of structure formation in the universe, describing the main processes determining the power spectrum, the non-linear gravitational collapse, the formation of galaxies and the evolution of the intergalactic medium. Recent advances in the observations of high redshift galaxies, and their interpretation in the context of this theory, are then summarized. Este artí culo de revisión presenta una breve exposición de la teorí a de la Materia Invisible Frí a de la formación de estructura en el universo, describiendo los procesos más importantes que determinan el espectro de potencia, el colapso gravitatorio no lineal, la formación de galaxias y la evolución del medio intergaláctico. Resumimos también los avances recientes en las observaciones de galaxias a alto corrimiento al rojo, y la interpretación en el contexto de esa teorí a.

  1. Farmers typology and crops sustainability in Alto Urubamba, La Convencion – Cusco

    Directory of Open Access Journals (Sweden)

    Isaías Merma

    2012-06-01

    Full Text Available The research was conducted in the geographical region of Alto Urubamba, province of La Convencion, Cusco - Peru. The objective was to identify types of farmers and evaluate crops sustainability on farms of high forest. Surveys were applied to a sample of 106 farmers in both biophysical and socio-economic terms in order to identify typology; this information was analyzed through descriptive statistics. Multivariate analysis using preselected variables was performed to identify types of farmers. In addition, sustainability of eight tropical crops was evaluated; for this purpose, three farms for each crop were selected from 24 evaluated farms. Practical indicators of soil quality and crop health with a valuation from 0 to 10 were used; farmers participated during this evaluation. The results show that there are three types of farmers according to their efficiency in resources management and their economic logic. The crops of tea (6.65 and mango (6.50 obtained the highest values of sustainability, followed by coffee (6.25, cocoa (6.25, citrus (5.50, banana (5.45 and coca (5.10. Papaya (4.60 shows a value less than five; therefore, is considered as unsustainable according to local conditions.

  2. La obesidad: un desorden metabólico de alto riesgo para la salud.

    Directory of Open Access Journals (Sweden)

    Carlos Hernán Daza

    2009-11-01

    Full Text Available La obesidad es un trastorno metabólico y nutricional de serias consecuencias para la salud. A pesar de existir un mejor conocimiento clínico y epidemiológico del problema, la prevalencia de la obesidad ha aumentado significativamente en países industrializados y en desarrollo. Existen pautas estandarizadas para el diagnóstico clínico-nutricional y el tratamiento multifactorial de la obesidad con énfasis en la promoción de estilos de vida saludable que incluyan alimentación balanceada, mayor actividad física y disminución del sedentarismo. Se reconoce el alto riesgo que representa la obesidad en la incidencia de varias enfermedades crónicas: hipertensión arterial, enfermedad isquémica coronaria, accidentes cerebro-vasculares, diabetes tipo 2 y ciertas formas de cáncer, que son causa importante de morbilidad y mortalidad en los países del hemisferio occidental.

  3. Reporte de cuatro casos clínicos de filariasis en Alto Nanay, Loreto

    Directory of Open Access Journals (Sweden)

    Javier Vargas-Herrera

    2013-09-01

    Full Text Available El presente estudio describe los hallazgos clínicos, parasitológicos y de laboratorio de cuatro pacientes residentes en el distrito de Alto Nanay, Maynas, Loreto, Perú; infectados con microfilarias de Mansonella ozzardi. La evaluación clínica incluyó las especialidades de oftalmología, cardiología y nefrología. En el caso 1, destaca la presencia de dos tumoraciones subcutáneas, una a nivel dorsal y la otra en el tercio inferior de la pierna izquierda; en el caso 2, la sensación de “hormigueo o frío en las piernas”; en el caso 3 se encontró asociada una infección crónica por hepatitis B y en el caso 4 una tumoración de gran tamaño en región lumbar izquierda. En los cuatro pacientes se encontró Mansonella ozzardi y eosinofilia, tres presentaron valores mayores a 20%. La tumoración en el caso 4 correspondió a una hernia de contenido intestinal. Es necesario ejecutar más estudios clínicos y evaluar su verdadero efecto patógeno, es también pertinente estudiar la diversidad genética de filarias de la Amazonia peruana.

  4. Contribution for geochronological evolution study of the Pianco-Alto Brigida fold belt system

    International Nuclear Information System (INIS)

    The Proterozoic Painco-Alto Fold Belt is situated in the central portion of the Borborema Province and it probably is just a segment of a longer structural development encompassed between the Patos (N) and Pernambuco (S) lineaments. The geochronological study was carried out along a cross section in the central part of the belt (Paraiba State) where biotite-muscovite quartz schists are the predominating rock types, including intercalations of bi-modal volcanics, marbles and quartzites. These rocks were metamorphosed in the amphibolite facies, and they display a complex history of folding. Zircons of the acid volcanics (meta-rhyolytes where analysed through U/Pb method and they plot in a discordia diagram with superior intercept indicating ages around 1100 Ma. Whole rocks Rb/Sr analyses on the same meta-volcanics are indicating isochrons of 950Ma. These data are being respectively interpreted as ages of sedimentation (and volcanism) and regional metamorphism associated to the main (D sub(2)) phase of folding. One of the main purpose of this paper is to stress the importance of the ages around 950Ma, in the central domain of the Borborema Province, as result of regional folding and metamorphism. Some other occurence of ages in the 1000-900Ma range will be discussed as support for this interpretation from now on adopted. (author)

  5. Hyphessobrycon ocasoensis sp. n. (Teleostei, Characidae una nueva especie para el Alto Cauca, Colombia

    Directory of Open Access Journals (Sweden)

    García-Alzate, C. A.

    2008-12-01

    Full Text Available Hyphessobrycon ocasoensis n. sp. (Teleostei, Characidae a new species from the Alto Cauca, Colombia Hyphessobrycon ocasoensis n. sp. (Characiformes, Characidae from heterorhabdus group (Gery, 1977 is described from the upper Cauca River in Colombia. The new species is distinguished from all other known species by the following combination of characters: three unbranched and eight branched fins in the dorsal fin; short maxillary bone with one or no teeth; four small foramens in the maxillary bone, and five in the premaxillary; 5-17 scales with pores in the lateral line, six between the lateral line and anal-fin origin, six between the lateral line and pelvic-fin origin, and nine predorsals; depth of the caudal peduncle has a mean of 16.7% in standard length; interorbital width 50.6% in head; a dark spot on caudal peduncle and a dark lateral band that extends vertically from the dorsal–fin origin to the tips of the middle caudal fin rays. Physical and chemical data of their habitat are included.

  6. CANTOS DE PROTESTO - MODOS DE SER NO ALTO SERTÃO ALAGOANO

    Directory of Open Access Journals (Sweden)

    Alexandre Ferraz Herbetta

    2009-08-01

    Full Text Available Este artigo é resultado de um estudo mais amplo, presente na dissertação, sobre a teoria musical indígena dos Kalankó, relacionada à música dos outros grupos indígenas do alto sertão alagoano. Neste texto, tento demonstrar como, em um sistema cultural específico, a música é responsável pela constituição do grupo étnico, por sua identificação com outros grupos da região, a sociedade do entorno e o governo brasileiro, pela comunicação de símbolos e sentidos basilares ao grupo e também como forma de atuação política, o que acontece, especialmente, por meio do toré, um dos gêneros musicais das comunidades, que é entendido historicamente como elemento cultural diacrítico e símbolo de “indianidade”.

  7. Design provisions related to fire control in the Alto Lazio nuclear power plant

    International Nuclear Information System (INIS)

    The licensing activities at the Alto Lazio nuclear power plant included systematic revision of the fire control provisions and definition of several technical aspects related to specific design. The design of the plant was reviewed according to the Italian laws for nuclear installations in order to issue a construction permit and subsequently to allow the construction or installation of each building or system. Since the first stage of the review (construction permit and licences for civil work), special attention has been given to: analysis of fire risk, definition of fire areas and selection of materials. Specifically oriented criteria were defined in order to provide effective tools for decision making as well as adequate fire prevention and passive fire protection. Some problems that arise in applying the most recent standards were caused by limitations in the conceptual design and general layout that were already 'frozen' in the earliest stages. During the successive licensing activities, e.g. licences for system installation, it was necessary to hold further discussions on aspects such as: the extent of seismic qualification of the detection and extinguishing systems; centralized and local fire supervision; the role of smoke control and ventilation systems in fire fighting; plant control requirements in the event of control room unavailability; physical separation of equipment inside the primary containment; and the required reliability of extinguishing systems, including those features necessary to ensure manual recovery of the systems. (author). 1 fig., 1 tab

  8. a Comparative Study of Alto Saxophone Reeds Through Spectral and Subjective Analyses.

    Science.gov (United States)

    Henderson, Caroline Blythe

    The purpose of this study was to analyze six brands of cane reeds and five brands of synthetic reeds to determine the differences in tone quality produced by each. Spectral analysis was used to determine the individual reed which conformed most closely to the average profile of each brand. A panel of seven saxophone performers then presented their opinions of the each reed's tone quality upon hearing a live performance of an excerpt from Eugene Bozza's Aria for alto saxophone and piano performed on the reeds most representative of each brand. The evaluation form used by the judges included ten sets of bipolar adjectives: good-bad, harmonious-dissonant, clean-dirty, light-dark, pleasurable-painful, beautiful-ugly, strong-weak, complex -simple, masculine-feminine, and interesting-boring. The results indicated that the primary factors influencing the tone quality of a given reed were the strength of the overtones present regardless of their order and the dominance of either the fundamental or the first overtone. Although professional musicians normally hand-select their reeds for performance, this research based on both spectral and subjective analyses provides clear evidence for both musicians and music educators to refine and improve their reed selection process.

  9. The Early Triassic magmatism of the Alto Paraguay Province, Central South America: Paleomagnetic and ASM data

    Science.gov (United States)

    Ernesto, Marcia; Comin-Chiaramonti, Piero; Gomes, Celso de Barros

    2015-10-01

    A paleomagnetic studystudywork was carried out on the Alto Paraguay Province (APP), a belt of alkaline complexes that parallel the Paraguay river for more than 40 km at the border of Brazil and Paraguay. The province is well dated by 40Ar/39Ar method giving ages in the range 240-250 Ma with a preferred age of 241 Ma. Intrusive rocks are predominant but the stocks may be topped by lava flows and ignimbrites. Paleomagnetic work on stocks, dikes and flows of the APP identified normal and reversed magnetic components which are carried mainly by titanomagnetites. The calculated paleomagnetic pole located at 319ºE 78ºS (α95 = 6º; k = 23) is in agreement with other South American poles of Permo-Triassic age. Most of the sampling sites showed large variations in rock magnetization, but similar patterns in the variation of the within-site magnetizations, mainly in dikes, suggest geomagnetic polarity transition records. The magnetization data along with the anisotropy of magnetic susceptibility determinations suggested that the South and North areas of the province have different evolution characteristics.

  10. Energy and quality of life: a case study in HPP Tijuco Alto, Ribeira, SP; Energia e qualidade de vida: estudo de caso da Uhe Tijuco Alto no Municipio de Ribeira, SP

    Energy Technology Data Exchange (ETDEWEB)

    Conceicao, Andre Luiz da [Universidade Estadual de Campinas (FEM/UNICAMP), SP (BRazil). Fac. de Engenharia Mecanica], email: conceicao.andreluiz@yahoo.com.br; Seixas, Sonia Regina da Cal [Universidade Estadual de Campinas (NEPAM/UNICAMP), SP (BRazil). Nucleo de Estudos e Pesquisas Ambientais], email: srcal@unicamp.br

    2010-07-01

    This paper deals with a critical and reflexive that the issue involving the possibility of construction and operation of Hydroelectric Power (HEP) Tijuco Alto, the upper course of the Ribeira Valley between Sao Paulo and Parana, in the Vale do Ribeira. This project will directly affect the towns of Ribeira-SP, Itapirapua Paulista-SP, Cerro Azul-PR, Dr. Ulysses-PR and Adrianopolis-PR. Thus, we defined the main objective of the research examines the quality of life in the city of Ribeira-SP, at the possibility of deployment of the dam. Thus, field research was conducted in the city and interviews with residents, where it was possible to observe, among other things the precarious economic conditions, social, urban and cultural community. Another aspect noted was the fact that most respondents to position themselves for the construction of the HPP Tijuco Alto, citing primarily the need for local development and increased job opportunities. Those opposing the plant, highlighted environmental issues, mainly, reasons related to loss of peace and security site. Regardless of those who are for or against, a technical opinion issued by IBAMA in 2008 points to the likely deployment of the HPP Tijuco Alto. (author)

  11. Relación entre el estilo de vida de una joven deportista de alto rendimiento y los patrones funcionales de salud de Marjory Gordon

    OpenAIRE

    Fabra Heredia, Juan Manuel; Casadó Marín, Lina

    2014-01-01

    Estudio de caso que busca conocer y comprender la relación que hay entre el estilo de vida de una joven deportista de alto rendimiento y los patrones funcionales de salud, a través de la valoración realizada a una joven deportista de alto rendimiento, desde una perspectiva holística, para adentrarse en las peculiaridades propias de este estilo de vida y crear un punto de partida para los cuidados de enfermería dirigidos a deportistas de alto rendimiento. En este caso, se observaron factores p...

  12. Os agricultores familiares e a representação política do SUTRAF na região Alto Uruguai do RS

    OpenAIRE

    Seminotti, Jonas José

    2013-01-01

    Resumo: O presente trabalho teve como objetivo analisar as características socioeconômicas dos associados do Sindicato Unificado dos Trabalhadores na Agricultura Familiar do Alto Uruguai (SUTRAF) e as implicações para o processo de representação política exercida por esta entidade sindical na região Alto Uruguai. A realização deste trabalho contou com a pesquisa teórica que analisou o processo de ocupação e colonização da região Alto Uruguai e as noções de capital social, de movimento social,...

  13. Nuclear reactor

    International Nuclear Information System (INIS)

    Cover gas spaces for primary coolant vessel, such as a reactor container, a pump vessel and an intermediate heat exchanger vessel are in communication with each other by an inverted U-shaped pressure conduit. A transmitter and a receiver are disposed to the pressure conduit at appropriate positions. If vibration frequencies (pressure vibration) from low frequency to high frequency are generated continuously from the transmitter to the inside of the communication pipe, a resonance phenomenon (air-column resonance oscillation) is caused by the inherent frequency or the like of the communication pipe. The frequency of the air-column resonance oscillation is changed by the inner diameter and the clogged state of the pipelines. Accordingly, by detecting the change of the air-column oscillation characteristics by the receiver, the clogged state of the flow channels in the pipelines can be detected even during the reactor operation. With such procedures, steams of coolants flowing entrained by the cover gases can be prevented from condensation and coagulation at a low temperature portion of the pipelines, otherwise it would lead clogging in the pipelines. (I.N.)

  14. Sobre la determinación de la calidad de las escorias de horno alto y de las puzolanas

    Directory of Open Access Journals (Sweden)

    Wittekindt, W.

    1964-06-01

    Full Text Available Not availableEn la molienda de clínker portland con escoria de horno alto para obtener cemento portland de hierro y cemento de horno alto, uno está más seguro de la calidad del clínker que de la escoria. El análisis del clínker y el cálculo de los minerales de clínker, facilitado por este análisis, nos dice ya, en gran parte, si se puede fabricar con este clínker un cemento portland de mayor o menor resistencia, si pueden esperarse buenas resistencias iniciales o si hay que contar más bien con mayores resistencias finales, cual es la resistencia del cemento a los sulfatos, etc.

  15. Hybrid adsorptive membrane reactor

    Science.gov (United States)

    Tsotsis, Theodore T. (Inventor); Sahimi, Muhammad (Inventor); Fayyaz-Najafi, Babak (Inventor); Harale, Aadesh (Inventor); Park, Byoung-Gi (Inventor); Liu, Paul K. T. (Inventor)

    2011-01-01

    A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.

  16. Hybrid adsorptive membrane reactor

    Science.gov (United States)

    Tsotsis, Theodore T.; Sahimi, Muhammad; Fayyaz-Najafi, Babak; Harale, Aadesh; Park, Byoung-Gi; Liu, Paul K. T.

    2011-03-01

    A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.

  17. Irrigation modernization and water conservation in Spain: The case of Riegos del Alto Aragón

    OpenAIRE

    Lecina Brau, Sergio; Isidoro, Daniel; Playán Jubillar, Enrique; Aragüés Lafarga, Ramón

    2010-01-01

    This study analyzes the effects of irrigation modernization on water conservation, using the Riegos del Alto Aragón (RAA) irrigation project (NE Spain, 123354 ha) as a case study. A conceptual approach, based on water accounting and water productivity, has been used. Traditional surface irrigation systems and modern sprinkler systems currently occupy 73% and 27% of the irrigated area, respectively. Virtually all the irrigated area is devoted to field crops. Nowadays, farmers are investing on ...

  18. Study of the nuclear structure of exotic nuclei at ALTO: developments and results of two new experimental setups

    International Nuclear Information System (INIS)

    ALTO (Accelerateur Lineaire et Tandem d'Orsay) is a facility composed of two accelerators dedicated to research and industrial applications. There is a 15 MV tandem and a linear accelerator. My PhD work was to develop the instrumentation of the linear accelerator part of ALTO which provides radioactive beams for fundamental research. These radioactive beams are produced using the Isotope Separation On-Line method (ISOL). This technique allows three kinds of experiments: mass measurement, nuclear orientation and radioactivity experiments. Among those three types of experiments, I worked on the development of two new experimental platforms for the ALTO instrumentation. The first one, BEDO (Beta Decay studies in Orsay) is an ensemble of detectors dedicated to β-γ spectroscopy of β-decaying nuclei produced by ALTO. I present in this thesis, the commissioning of this new experimental set-up, its technical characteristics and the tools development leading to the first results. For this commissioning experiment a mass 82 radioactive beam was produced, taking this opportunity the 82Ge → 82As decay was re-investigated allowing to establish a new level scheme for 82As and giving the first evidences for the presence of intruder states in the N=49 odd-odd isotones. The second project, which is developed, is POLAREX (Polarization of Exotic nuclei), a new facility for nuclear orientation experiments. My thesis deals with the entire reconditioning of a 3He-4He dilution refrigerator (major and most complex element of the facility) and R and D and technical developments of the platform. These contributions allowed the successful commissioning of the new experimental platform with the first physical measurements on 54Mn, 56Co, 57Co created by activation of an iron foil with deuterons produced by the Tandem. (author)

  19. Informe de nuevas variedades. SAMILA, NUEVO CULTIVAR CUBANO DE PAPA CON RENDIMIENTO ALTO Y ESTABLE PARA EL CONSUMO FRESCO

    Directory of Open Access Journals (Sweden)

    Jorge L. Salomón Díaz

    2011-01-01

    Full Text Available Con el objetivo de obtener una nueva variedad depapa con rendimientos altos y estables, tolerancia a las principalesenfermedades que atacan al cultivo en Cuba, calidad del tubérculoy buena conservación en cámara refrigerada, se cruzaron lavariedad 'Desirée' con el cultivar cubano 'Lizette' de rendimientoalto y se obtuvo el nuevo cultivar cubano 'Samila'.

  20. Reactor container

    International Nuclear Information System (INIS)

    Purpose: To prevent shocks exerted on a vent head due to pool-swell caused within a pressure suppression chamber (disposed in a torus configuration around the dry well) upon loss of coolant accident in BWR type reactors. Constitution: The following relationship is established between the volume V (m3) of a dry well and the ruptured opening area A (m2) at the boundary expected upon loss of coolant accident: V >= 30340 (m) x A Then, the volume of the dry well is made larger than the ruptured open area, that is, the steam flow rate of leaking coolants upon loss of coolant accident to decrease the pressure rise in the dry well at the initial state where loss of coolant accident is resulted. Accordingly, the pressure of non-compressive gases jetted out from the lower end of the downcomer to the pool water is decreased to suppress the pool-swell. (Ikeda, J.)

  1. Ethnobotanical notes about some uses of medicinal plants in Alto Tirreno Cosentino area (Calabria, Southern Italy

    Directory of Open Access Journals (Sweden)

    Impieri Massimo

    2007-11-01

    Full Text Available Abstract Background The present paper contributes to enrich the ethnobotanical knowledge of Calabria region (Southern Italy. Research was carried out in Alto Tirreno Cosentino, a small area lying between the Tyrrhenian coast and the Pollino National Park. In the area studied medicinal plants still play a small role among farmers, shepherds and other people who live far from villages and built-up areas. Methods Information was collected by interviewing native people, mainly elderly – engaged in farming and stock-raising activities – and housewives. The plants collected, indicated by the locals, have been identified according to "Flora d'Italia". The exsiccata vouchers are preserved in the authors' own herbaria. Results 52 medicinal species belonging to 35 families are listed in this article. The family, botanical and vernacular name, part of the plant used and respective manipulation are reported there and, when present, similar or identical uses in different parts of Calabria or other Italian regions are also indicated. Conclusion Labiatae, Rosaceae and Leguminosae are the families most frequently present, whilst Compositae and Brassicaceae are almost absent. The uses of the recorded species relate to minor ailments, mainly those of the skin (15 species, respiratory apparatus diseases (11, toothache, decay etc. (10 and rheumatic pains (8. The easy availability of these remedies provides a quick way of curing various minor complaints such as tooth-ache, belly and rheumatic pain and headaches and can also serve as first aid as cicatrizing, lenitive, haemostatic agents etc. The role in veterinary medicine is, on the contrary, more important: sores, ulcers, tinea, dermatitis, gangrenous wounds of cattle, and even respiratory ailments are usually cured by resort to plants.

  2. 222 Rn exposure assessment in the caves of Parque Estadual Turistico do Alto Ribeira (PETAR)

    International Nuclear Information System (INIS)

    In the present work, radon concentrations in six caves of PETAR - Parque Estadual Turistico do Alto Ribeira (High Ribeira River Touristic State Park) were carried out with Makrofol E solid state nuclear track detectors (SSNTD) and used to assess the annual effective dose received by regional tour guides. The park has four visitation centers: Santana, Ouro Grosso, Caboclos e Casa de Pedra and receives nearly 40,000 people annually. The caves evaluated were Couto, Agua Suja, Laje Branca, Morro Preto and Santana, from Santana center and Alambari de Baixo from Ouro Grosso center, for being the most frequently visited caves. The exposure period of the SSNTD was, at least, three months, over a period of 26 months, from October 2003 to November 2005.The 222Rn concentrations lay in a range from 153 Bq.m-3 to 6607 Bq.m-3 and we observed that, in general, for chilly weather, the radon levels decrease. The annual effective dose, considering the most realistic scenario, with geometric mean concentrations, an equilibrium factor of 0.5 and annual exposure time for each cave, varied from 0.2 mSv.a-1 for the Couto cave, strongly ventilated, to 4.0 mSv.a-1 for the Santana cave, the most frequently visited and no external communication. For the worst scenario, with arithmetic mean concentrations, equilibrium factor 1 and annual exposure time for all caves, the annual effective dose was 16.1 mSv.a-1. All assessed effective doses received by the tour guides are bellow 20 mSv.a-1 suggested as an annual effective dose limit for occupational exposure by the International Commission of Radiological Protection (ICRP 60, 1990). (author)

  3. Diversidad de peces en la cuenca del Alto Yuruá (Ucayali, Perú

    Directory of Open Access Journals (Sweden)

    Blanca Rengifo

    2013-05-01

    Full Text Available El presente estudio compara los patrones de diversidad de peces en la Cuenca del Alto Yurúa. El área de estudio comprendió tres sub cuencas: Beu, Breu y Yurúa, todas sin impacto antropogénico. Mediante pesca con redes de arrastre a orilla, se colectaron 10564 individuos y se identificaron 185 especies de peces. En escala regional, el promedio del índice de diversidad Shannon (H’ para Beu fue de 2,02; para Breu 1,84 y para Yuruá 1,75. Según el análisis de rarefacción, Yurúa tuvo la riqueza de especies esperada más alta (91 spp. en comparación con Beu (87 y Breu (68. En la escala local, los ambientes lóticos presentaron mayor riqueza y diversidad que los lénticos. La diversidad promedio (H’ fue mayor en lóticos (Beu 2,04; Breu 1,90; y Yurúa 1,86, comparados con lénticos de los mismos (Beu 1,66; Breu 1,86; y Yurúa 1,82. La mayor diversidad de peces observada en ambiente lóticos podría explicarse por que la mayoría de peces amazónicos tienen el comportamiento de desplazarse por los canales principales de los ríos, mientras que los lagos pueden presentar condiciones de estrés estacional (alta presión de depredación y bajas concentraciones de oxígeno disuelto.

  4. Occupational safety and health practices among flower greenhouses workers from Alto Tietê region (Brazil)

    International Nuclear Information System (INIS)

    In this preliminary study the occupational safety and health practices among flower greenhouses workers were evaluated. The study was carried out in the alto Tietê region, located at the Sao Paulo State, Brazil. Inadequate welfare facilities; poor pesticide storage, use and disposal conditions; use of highly toxic pesticides; lack of adequate data regarding pesticide use; and incorrect use and maintenance of PPE were observed in most of the visited greenhouses. These results suggest that, in greenhouses, workers may be at higher risk of pesticide exposure, due to many factors that can intensify the exposure such as the lack of control on reentry intervals after pesticide application. Specific regulations are needed to ensure better OSH practices on pesticide use and to improve working conditions in greenhouses, in order to deal with the peculiarities of greenhouse working environment. Some of the special requirements for greenhouses workers' protection are the establishment of ventilation criteria for restricted entry interval; clear reentry restrictions; and EPI for workers other than applicators that need to enter the greenhouse before expiring REI interval. Another important way to improve OSH practices among workers includes the distribution of simple guidelines on the dos and don'ts regarding OSH practices in greenhouses and extensively training interventions to change the perception of hazards and the behavior towards risk. - Highlights: ► Occupational safety and health practices among flower greenhouses workers were evaluated. ► Lack of clear reentry restrictions can intensify the exposure in greenhouses. ► Specific regulations dealing with the peculiarities of greenhouse working environment are needed. ► Distribution of simple guidelines relying on greenhouse working can improve OSH practices. ► Training interventions are important to change the workers' perception of hazards and behavior towards risk.

  5. BENITO, NUEVO MUTANTE DE FLOR DE JAMAICA (Hibiscus sabdariffa, L.) DE ALTO POTENCIAL PRODUCTIVO EN CONDICIONES DE BAJOS SUMINISTROS DE AGUA

    OpenAIRE

    María C. González Cepero

    2015-01-01

    En el Instituto Nacional de Ciencias Agrícolasse desarrolló un programa de mejoramiento genético dirigidoa obtener variedades de Flor de Jamaica de alto potencialproductivo, en condiciones de bajos suministros de agua.

  6. Ästhetische Kommunikation unter interkultureller Perspektive. Eine qualitative Analyse von ästhetischen Wahrnehmungen zum Bild der Marke "Südtirol/Alto Adige"

    OpenAIRE

    Bua, Vincenzo

    2009-01-01

    In the qualitative study of mental associations with the brand picture "Südtirol/Alto Adige" different images of the region among German speaking, Italian speaking and bilingually grown up South Tyroleans were analysed. The research interest was focused on the communalities and differences in these associations in order to identify potentially conflicting positions between the two major language groups in Südtirol/Alto Adige. In this paper the method is demonstrated which was used to display ...

  7. Survey of research reactors

    International Nuclear Information System (INIS)

    A survey of reasearch reactors based on the IAEA Nuclear Research Reactor Data Base (RRDB) was done. This database includes information on 273 operating research reactors ranging in power from zero to several hundred MW. From these 273 operating research reactors 205 reactors have a power level below 5 MW, the remaining 68 reactors range from 5 MW up to several 100 MW thermal power. The major reactor types with common design are: Siemens Unterrichtsreaktors, 1.2 Argonaut reactors, Slowpoke reactors, the miniature neutron source reactors, TRIGA reactors, material testing reactors and high flux reactors. Technical data such as: power, fuel material, fuel type, enrichment, maximum neutron flux density and experimental facilities for each reactor type as well as a description of their utilization in physics and chemistry, medicine and biology, academic research and teaching, training purposes (students and physicists, operating personnel), industrial application (neutron radiography, silicon neutron transmutation doping facilities) are provided. The geographically distribution of these reactors is also shown. As conclusions the author discussed the advantages (low capital cost, low operating cost, low burn up, simple to operate, safe, less restrictive containment and sitting requirements, versatility) and disadvantages (lower sensitivity for NAA, limited radioisotope production, limited use of neutron beams, limited access to the core, licensing) of low power research reactors. 24 figs., refs. 15, Tab. 1 (nevyjel)

  8. Department of reactor technology

    International Nuclear Information System (INIS)

    The activities of the Department of Reactor Technology at Risoe during 1979 are described. The work is presented in five chapters: Reactor Engineering, Reactor Physics and Dynamics, Heat Transfer and Hydraulics, The DR 1 Reactor, and Non-Nuclear Activities. A list of the staff and of publications is included. (author)

  9. RB reactor noise analysis

    International Nuclear Information System (INIS)

    Statistical fluctuations of reactivity represent reactor noise. Analysis of reactor noise enables determining a series of reactor kinetic parameters. Fluctuations of power was measured by ionization chamber placed next to the tank of the RB reactor. The signal was digitized by an analog-digital converter. After calculation of the mean power, 3000 data obtained by sampling were analysed

  10. FORMAS DE LEITO E TRANSPORTE DE CARGA DE FUNDO DO ALTO RIO PARANÁ

    Directory of Open Access Journals (Sweden)

    Débora Pinto Martins

    2010-04-01

    Full Text Available O presente trabalho estima o transporte de carga de fundo no alto rio Paraná em Porto São José, PR (22º45’52”S e 53°10’34”W, num trecho de aproximadamente 2 km a jusante da Usina Hidrelétrica Engenheiro Sérgio Motta (Porto Primavera, onde o rio Paraná apresenta canal único com largura média de 1.200m e vazão média anual é de 8.912 m³/s. O cálculo da carga de fundo do canal foi baseado na determinação do tamanho das formas de leito e de sua velocidade de deslocamento linear, obtidos a partir de sucessivos levantamentos batimétricos. Foram realizadas três campanhas de levantamentos ecobatimétricos em diferentes momentos do ciclo hidrológico do rio, sendo cada campanha constituída por dois levantamentos separados em intervalos de 16 a 20 dias. O cálculo da carga de fundo baseou-se equação: Cf = (1-pH k Ud onde p é a porosidade (adimensional, H a altura média das formas de leito (m, k o coeficiente morfométrico das formas de leito (adimensional e Ud a velocidade de deslocamento das formas de leito (m/dia. As dunas são as formas de leito predominantes neste trecho do rio Paraná, com comprimento entre 50 e 100 m (média de 70,68 m e altura de 0,80 a 2,20 m (média de 1,30 m. A velocidade média de deslocamento linear das formas de fundo foi de 56,8 m/mês, para o período de maior vazão; e 45,0 m/mês para o período de menor vazão. O transporte médio de carga e fundo no rio Paraná foi estimado em 2.820,6 ton/dia, o que corresponde a 1.029.300 ton/ano. Comparando com dados anteriores, os autores sugerem que o transporte hidrossedimentar de fundo no trecho de canal estudado está sofrendo interferência da barragem de Porto Primavera.

  11. Pimelodus paranaensis, sp. n., um novo Pimelodidae (Pisces, Siluriformes do Alto Paraná, Brasil

    Directory of Open Access Journals (Sweden)

    Heraldo A. Britski

    1988-01-01

    Full Text Available Descreve-se Pimelodus paranaensis, sp. n., da bacia do Alto Paraná, Brasil, com base em 20 exemplares. A nova espécie pode ser assim diagnosticada: (i dentes presentes e formando duas áreas isoladas no vômer; (ii faixa pré-maxilar de dentes com um ângulo projetado para trás; (iii teto do crânio coberto por pele fina; (iv comprimento da nadadeira adiposa 3,9 a 4,3 vezes no comprimento padrão; (v a maior altura da nadadeira adiposa 3,1 a 4.3 vezes no seu comprimento; (vi região dorsal do corpo de cor castanha com pequenas manchas arredondadas, castanho-escuras. Apesar de possuir dentes vomerianos como em Pimelodus albicans, e como em certos exemplares de P. clarias (sensu Eigenmann & Eigenmann, 1890, achamos que as verdadeiras relações desta nova espécie e sua situação genérica só poderão ser estabelecidas após uma nova boa revisão do grupo.Pimelodus paranaensis, n. sp., from the Upper Paraná basin, is described on the basis of 20 specimens. The new species can be diagnosed as follows: (1 teeth present and forming two isolated on the vomer; (2 premaxillary band of teeth with a backward projecting angle; (3 top of head covered with thin layer of skin; (4 adipose fin basis 3,9 to 4.6 in standard length; (5 greatest depth of adipose fin 3.1 to 4.3 in its length, (6 dark spots along the dorsum. In spite of having teeth on the vomer as Pimelodus albicans, and as some specimens of P. clarias (sensu Eigenmann & Eigenmann, 1890 and in being similar to Bagropsis reinhardti in many respects, we feel that the true relationships and the generic status of the new species can be established only after a thorough revision of the group.

  12. Alto Patache fog oasis in the Atacama Desert: Geographical basis for a sustainable development program

    Science.gov (United States)

    Calderón, M.; Cereceda, P.; Larrain, H.; Osses, P.; Pérez, L.; Ibáñez, M.

    2010-07-01

    Alto Patache coastal fog oasis is a protected area located south of Iquique, Northern Chile, being presently in charge of the Atacama Desert Center (ADC) research group of the Pontificia Universidad Católica de Chile, since 1997. On 2007, the Chilean Government bestowed a piece of land stretch covering 1,114 hectares to ADC scientific group for scientific research, ecosystem protection and environmental education. This oasis has been recently studied from different points of view: climate, biogeography, fog collection, geomorphology, soil survey and land use planning, plant distribution, conservation and archaeology. During 2009, a study of the geographical basis to elaborate a general management plan was undertaken to collect information to fulfill our planned out objectives. Through this study, georreferenciated strategic information was compiled to evaluate future actions conducting to a sustainable development within the protected area. This information was translated into thematic maps showing the spatial distribution of variables like: climate, geology, geomorphology, soils, vegetation, fauna, archaeological sites and management zones. The methodology used is the analysis of satellite imagery, using GPS by creating a cartographic Data Base incorporated in GIS. Results show that the area starts at the littoral plain, ranging from 500 m to 2.000 m, being continued in parts by a piedmont intercepted by a very abrupt mega-cliff, or hectares of climbing sand dunes leading to a short high plateau limited by a soft hilly area to the East. Two soil types are characteristic: Entisols (Torriorthent) covering the coastal beach sediments, and Aridisols along the cliff and adjacent hills. Vegetation consists not only of a very rich lichen cover, but also of endangered vascular species associations constituting a very fragile sub-tropical coastal desert community, such as Eulychnia, Cumulopuntia, Eriosyce cacti, and Lycium - Nolana- Ephedra communities. Fog oasis

  13. Crustal Structure and Moho Geometry around the Alto Tiberina Fault (Northern Apennines) from Receiver Functions

    Science.gov (United States)

    Licciardi, A.; Chiaraluce, L.; Piana Agostinetti, N.; Amato, A.

    2013-12-01

    The Alto Tiberina Fault (ATF) is an unique example of active low angle normal fault (dip ≈ 15°), detected in the Northern Apennines from the interpretation of passive and active seismic data. This NW-SE striking structure has been mapped for a about 50 km along dip and is thought to have accumulated a total of 2 km of displacement in the last 2 Ma. In the last years, a dense, high resolution seismic network has been deployed in the area surrounding the ATF, with the aim of better understanding the physical mechanisms of earthquakes nucleation of such geological feature and assessing the potentially associated seismic hazard. In this context, a good knowledge of the elastic properties of rocks at depth is the starting points for building accurate and consistent physical models of ATF's style of deformation. We carried out a teleseismic receiver functions (RF) study on the 42 broadband seismic stations, using about 800 events from teleseismic distances, recorded from January 2010 to December 2011. We selected an average of about 70 high S/N ratio RFs per station, achieving a good azimuthal coverage for most of the stations. We separated the isotropic and the anisotropic component of the RF data-set through the harmonic decomposition. For each station, we performed a Monte Carlo inversion (using a reversible jump Markov chain Monte Carlo algorithm) of the isotropic component of the RF data-set, obtaining 1-D Vs profiles from the surface to 60km depth. This kind of inversion does not suffer of the problems related to the choice of a particular starting model, and has the advantage of inferring the degree of complexity (i.e. the number of layers) of the resulting model, directly from the data themselves. Preliminary results show an increasing level of structural complexity moving from west to east across the target area. A clear and shallow (~25 km) Moho is observed from the velocity profiles in the westernmost part of the region. Along the easternmost part, crustal

  14. Geophysical Survey in Iquique and Alto Hospicio, northern Chile Cities: Tectonic and Geologic Implications.

    Science.gov (United States)

    García-Pérez, T.; Yanez, G. A.; Cembrano, J. M.; Marquardt, C.; Gomila, R.; Santibanez, I.; Maringue, J.

    2015-12-01

    The crustal deformation nature during the Cenozoic in northern Chile forearc (Coastal Cordillera; CC) is complex due to the several tectonics process involved, such as plate convergence, a continental orocline (Arica bend) and great degree of coupling between Nazca and South America plates. Such deformation could be regionally explained by an EW-extension generally accommodated by trench parallel faults system (TPFS). Also between ca. 19°-22° S, a small but significant NS-shortening produce folds and faults scarps striking orthogonal to plate boundary denominated trench-orthogonal faults system (TOFS). The main goal of this study is to understand the recent deformation history of the rocks units making up this part of the CC and the structural controls exerted on them by this fault systems. To achieve this, geophysical surveys have been conducted in Iquique and Alto Hospicio cities, both located in northern Chile. The results obtained by Gravity and Electromagnetics Transient (TEM) surveys are consistent with the nature and geometry of geological units previously identified in the zone. Sedimentary and intrusive rocks shows high values of density and resistivity, whereas volcanic rocks are associated with high values of density but low values of resistivity. This difference could be explained by water hosted by the fractured volcanic unit. Moreover, the sedimentary units are related to low values of density and resistivity. A first-order feature shown by the gravity anomaly is the existence of a NS sedimentary basin filled with gravels. However, this basin presents several discrete depocentres coinciding with EW faults. This could be interpreted as Quaternary deformation of the CC. TEM data shows changes in resistivity of the subsurface suggesting different relative levels for the same lithological units. These variations can be explained by normal or inverse movements of NS and EW faults that cut and displace all the units. In conclusion, results obtained from

  15. 4D modelling of the Alto Tiberina Fault system (Northern Apennines, Italy)

    Science.gov (United States)

    De Donatis, Mauro; Susini, Sara; Mirabella, Francesco; Lupattelli, Andrea; Barchi, Massimiliano

    2014-05-01

    The Alto Tiberina Fault (ATF) in the Northern Apennines of Italy is a low-angle normal fault dipping to the East and accommodating up to 10 km of extension. The fault is ~70 km long and is the detachment for the SW-dipping Gubbio normal fault. The ATF fault system has been dramatically exhumed and the ATF footwall has evolved in a horst bounded to the east by ATF synthetic faults and to the west by the Corciano west-dipping normal fault. The fault has been widely studied over the last years in order to understand its mechanical behaviour, its present-day deformation rate and its seismological role. By using a wide data-set including subsurface data (seismic reflection profiles and boreholes) and surface geological data (new maps of the CARG project of Italy), we have reconstructed the 3D geometry of both the fault and of the main lithostratigraphic boundaries at the fault hanging-wall and foot-wall. The CARG map data were integrated by local observations and mapping using mobile GIS software (BeeGIS) and Android app (Geopaparazzi). Surface data were combined with seismic reflection profiles and wells interpretation and other data from available literature. The large amount of information were combined in MOVE software (Midland Valley Exploration ltd). Our reconstruction allows to i) build up a three-dimensional geological model of the subsurface including the main faults and lithostratigraphic boundaries; ii) identify a set of east-west trending faults the role of which was previously underestimated; iii) test a 3D-restoration of extension for the visualization of the time evolution and for the validation of the structural reconstruction. The restored structures are the main normal faults in the region. The sequential restoration was performed by taking into account the timing of deformation as derived from the literature. The model was sequentially restored according to the following chronological order from the latest to the oldest: 1a) last deformational event

  16. Metal and trace element sediment assessment from Guarapiranga reservoir, Alto Tiete Basin, Sao Paulo, SP, Brazil

    International Nuclear Information System (INIS)

    The Guarapiranga Reservoir, located in Sao Paulo metropolitan region, Brazil, is responsible for supplying about 20% of the entire population's water needs of this region or approximately 3.7 million people. However, this system has shown significant degradation in water quality, due to untreated domestic sewage and industrial effluents. In this study sediment samples were collected at five points along the reservoir and total concentration of some major (Fe, K and Na), trace (As, Ba, Br, Co, Cr, Cs, Hf, Hg, Rb, Sb, Sc, Ta, Tb, Th, U, V and Zn) and rare earth (Ce, Eu, La, Lu, Nd, Sm, Tb and Yb) elements were determined by instrumental neutron activation analysis (INAA). By inductively coupled plasma optical emission spectrometry (ICP OES) the concentrations of Al, Ba, Be, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb, Ti, V e Zn were determined after digestion procedure following US EPA 3051 methodology. The concentrations of metals Cd and Pb were determined by graphite furnace atomic absorption spectrometry (GFAAS) and total Hg by cold vapor atomic absorption spectrometry (CVAAS). Methodology validation according to precision and accuracy was performed by reference materials analyses for the three different analytical techniques used. Multielemental results obtained by INAA were compared to NASC (North American Shale Composite), Upper Continental Crust (UCC) and soil from Guarapiranga park values. The Enrichment Factor (EF) and Geo accumulation Index (Igeo) were also evaluated for these data. Metal concentration results by ICP OES and AAS in the samples were compared to the TEL and PEL oriented values established by the Canadian Council of Ministers of the Environment and also adopted by CETESB (Environmental Protection Agency of the Sao Paulo State). The results were also compared to regional reference values (VRR) of limnic sediments from the Alto Tiete Basin. From these data an assessment of metal and trace element accumulated in the sediments from the

  17. Guanaco traces and hunting strategies at Alto Patache North Chilean fog oasis

    Science.gov (United States)

    Larrain, H.; Cereceda, P.; Pérez, L.

    2010-07-01

    1. In foregoing Fog Conferences, some of us have made explicit the rich botanic and faunistic inventory to be found at this Chilean Fog site. This was specially apparent under strong ENSO conditions, as it happened in 1997/98 in the area. Among the mammal biggest species represented, the guanaco (Lama guanicoe Müller) merits special mention. Clear traces of their presence and eventual hunting and slaughtering by primitive populations have survived until present times. Among them, the myriads of guanaco trails still covering practically all the slopes along the foggy area, close to the sea, and their wollowing and defecating places are found. Also, although less studied, plant eating traces left behind by roaming camelids can be seen. 2. Guanaco hunting traces still visible at Alto Patache can be portrayed differently through : A) Analysis of lithic artifacts used as arms in hunting operations; B) Botanic response to animal attack; C) Examination of topographic traits used by primitive man in guanaco hunting strategies. A. Hundreds of lithic instruments made of stone, were abandoned by hunters in situ, some of them were intact, some fragmented, which would demonstrate a direct relationship with hunting and slaughtering, and also their elaboration in workshops at place. Lithic points, scrapers and knives were found at places specially apt for hunting or slaughtering activities. Total isolation of the mountain fog site previous to our arrival in 1996, favoured their conservation at place. B. Careful observation of some local plants showed clear traces of guanaco feeding habits. As a proof thereof, old cactus of the species Eulychnia iquiquensis show in their basal portions clear signals in the forms of scars, caused by the eating by guanacos. Guanaco faeces were found at the foot of Ephedra plants. Many dead Stipa ichu plants (Gramineae), in different areas of the oasis provide evidence of cutting close to their basis, caused by sharp guanaco tooth under severe food

  18. Research Nuclear Reactors

    International Nuclear Information System (INIS)

    Published in English and in French, this large report first proposes an overview of the use and history of research nuclear reactors. It discusses their definition, and presents the various types of research reactors which can be either related to nuclear power (critical mock-ups, material test reactors, safety test reactors, training reactors, prototypes), or to research (basic research, industry, health), or to specific particle physics phenomena (neutron diffraction, isotope production, neutron activation, neutron radiography, semiconductor doping). It reports the history of the French research reactors by distinguishing the first atomic pile (ZOE), and the activities and achievements during the fifties, the sixties and the seventies. It also addresses the development of instrumentation for research reactors (neutron, thermal, mechanical and fission gas release measurements). The other parts of the report concern the validation of neutronics calculations for different reactors (the EOLE water critical mock-up, the MASURCA air critical mock-up dedicated to fast neutron reactor study, the MINERVE water critical mock-up, the CALIBAN pulsed research reactor), the testing of materials under irradiation (OSIRIS reactor, laboratories associated with research reactors, the Jules Horowitz reactor and its experimental programs and related devices, irradiation of materials with ion beams), the investigation of accident situations (on the CABRI, Phebus, Silene and Jules Horowitz reactors). The last part proposes a worldwide overview of research reactors

  19. Reactor Physics Training

    International Nuclear Information System (INIS)

    University courses in nuclear reactor physics at the universities consist of a theoretical description of the physics and technology of nuclear reactors. In order to demonstrate the basic concepts in reactor physics, training exercises in nuclear reactor installations are also desirable. Since the number of reactor facilities is however strongly decreasing in Europe, it becomes difficult to offer to students a means for demonstrating the basic concepts in reactor physics by performing training exercises in nuclear installations. Universities do not generally possess the capabilities for performing training exercises. Therefore, SCK-CEN offers universities the possibility to perform (on a commercial basis) training exercises at its infrastructure consisting of two research reactors (BR1 and VENUS). Besides the organisation of training exercises in the framework of university courses, SCK-CEN also organizes theoretical courses in reactor physics for the education and training of nuclear reactor operators. It is indeed a very important subject to guarantee the safe operation of present and future nuclear reactors. In this framework, an understanding of the fundamental principles of nuclear reactor physics is also necessary for reactor operators. Therefore, the organisation of a basic Nuclear reactor physics course at the level of reactor operators in the initial and continuous training of reactor operators has proven to be indispensable. In most countries, such training also results from the direct request from the safety authorities to assure the high level of competence of the staff in nuclear reactors. The objectives this activity are: (1) to provide training and education activities in reactor physics for university students and (2) to organise courses in nuclear reactor physics for reactor operators

  20. Variación antropométrica y nutricional en Susques y Alto Comedero entre 2002-2007

    Directory of Open Access Journals (Sweden)

    Bejarano, Ignacio

    2007-01-01

    Full Text Available Las poblaciones humanas experimentan variaciones de los parámetros antropométricos como expresión de los cambios socioambientales. El objetivo de este trabajo fue analizar la variación temporal de talla, peso y estado nutricional en dos poblaciones jujeñas situadas a distintos niveles altitudinales. Los datos procedieron de mediciones realizadas en 2002 y 2007 en poblaciones de 6 a 17 años de Susques (3500 m y Alto Comedero (1200 m. Se calcularon las categorías nutricionales de Waterlow y las diferencias entre talla y peso y categorías nutricionales se establecieron con ANOVA y prueba de comparación de proporciones (χ2 respectivamente. Para ambas poblaciones se observaron diferencias interanuales estadísticamente significativas de los promedios de talla y peso, siendo menores en Susques en el 2007, lo contrario sucede en Alto Comedero. Las diferencias interanuales de la categorías nutricionales no fueron estadísticamente significativas en Alto Comedero, pero si en Susques para normonutridos y obesos que disminuyeron y aumentaron respectivamente entre 2002 y 2007. En el contexto de las modificaciones socioeconómicas experimentadas por la población susqueña en los últimos años, debido a su mayor conexión e integración con poblaciones vecinas por la apertura del Paso de Jama, los resultados indicarían un empeoramiento de las condiciones nutricionales de su población infanto juvenil.

  1. Definition of reference safety standards for the licensing process of nuclear power plants: The Alto Lazio case

    International Nuclear Information System (INIS)

    An overview of the regulatory experience gained in Italy through the licensing process of the Alto Lazio nuclear power plant is presented. The main structure of the reference standard for Alto Lazio is constituted by United States rules, because of the strong link between technology and standards. The implementation of this set of standards in the Italian context involved an adjustment process in order to take into account the specific legal and institutional framework, the social conditions and the experience of the Italian industrial system. Consistent with this approach, the regulatory authority was devoted to an activity of interpretation and integration of the US standards during all the steps of the licensing process. In performing this activity, the regulatory authority ensured that the international regulations, the experiences of other European countries and the previous Italian positions played a fundamental role. Examples of additional criteria, requirements and technical specifications set up in this framework are presented. They concern, for instance, the implementation of probabilistic techniques, the radiological protection objectives, with a link between estimated frequencies of the event sequences and allowed consequences in terms of doses to the public as well as protection against man-made events and the application of the new symptomatic emergency procedures. The paper also illustrates some specific aspects of Italian law which facilitate an ongoing, and then more effective, updating of the reference standards. Post-Three Mile Island anticipated transient without scram and hydrogen control requirements and a position recently developed by Comitato Nazionale per la Ricerca e per lo Sviluppo dell'Energia Nucleare e delle Energie Alternative (ENEA) on severe accident response capabilities are given as examples. Lastly some proposals regarding possible applications of the ''intrinsically safe'' concept to Alto Lazio are discussed. (author). 2 figs

  2. Introduction of Nuclear Reactor Engineering

    International Nuclear Information System (INIS)

    This book introduces development, status, supply and demand and resource of nuclear reactor. It deals with basic knowledge of nuclear reactor, which are reactor system, heat recovery in reactor core, structural feature in reactor, materials of structure in reactor, shielding of gamma ray, shielding of reactor, safety and environmental problem of nuclear power plant, nuclear fuel and economical efficiency of nuclear energy.

  3. Inteligencia fluida y cristalizada en el autismo de alto funcionamiento y el síndrome de Asperger

    OpenAIRE

    Pérez, P.F.

    2016-01-01

    La inteligencia en los trastornos del espectro autista, especialmente en el autismo de alto funcionamiento y el síndrome de Asperger, ha sido tema de numerosas investigaciones que pretenden establecer la capacidad intelectual que se observa en estos sujetos. Algunos de los resultados más sobresalientes señalan que la inteligencia fluida es uno de los aspectos de desempeño superior en esta población, en comparación con el desempeño en las pruebas que miden inteligencia cristalizada como la esc...

  4. Influencia del contexto de alto rendimiento deportivo en los vínculos sociafectivos de jugadoras de baloncesto

    OpenAIRE

    Díez Flórez, Gloria Mª; Requena Hernández, Mª del Carmen

    2012-01-01

    El deporte de equipo de alto rendimiento se caracteriza por una futura limitación temporal, la intensidad de contacto físico y social y la temprana edad de inicio. El objetivo de esta investigación es comprobar la influencia de dichas variables en la construcción socioafectiva de jugadoras profesionales en el contexto familiar y deportivo. La muestra se compone de 64 jugadoras profesionales en activo con edades comprendidas entre los 18 y 35 años. El instrumento recoge carac...

  5. Prevalencias de sobrepeso y obesidad en niños y adolescentes de barrios con alto NBI de Puerto Madryn

    OpenAIRE

    Botterón, Tania Vanesa; Alecio, Alberto; Dahinten, Silvia Lucrecia

    2005-01-01

    Estudios previos indican que Pto. Madryn presenta características de una población en transición nutricional, con bajos índices de desnutrición e incremento en la incidencia de sobrepeso infantil. En relación a ello en el presente trabajo se evalúa la prevalencia de sobrepeso y obesidad en niños y adolescentes de barrios con alto promedio de familias con NBI y valorados con tres referencias: NCHS, SAP-IOTF y Frisancho, 1991. Se relevaron peso, estatura total, pliegues subescapular y tricipita...

  6. Periódicos brasileiros em Odontologia e a fuga dos artigos científicos de alto impacto

    Directory of Open Access Journals (Sweden)

    Rubenildo Oliveira da Costa

    2014-09-01

    Full Text Available Introducción: El aumento de los títulos de revistas brasileñas indexadas por el Journal Citation Report desde 2008 no ha sido acompañado por un aumento de las citas a las mismas revistas. Es decir, las últimas ediciones de este informe revelan un bajo rendimiento de las revistas brasileñas en el Factor de Impacto. En este estudio tratamos de explicar por qué ocurre esto. Método: Aplicación de técnicas bibliométricas, utilizando software libre Bibexcel. El corpus compuesto por 797 artículos de investigación publicados en revistas indexadas en Scopus - en el período de 2009 a 2010 - por los investigadores en el campo de la Odontología, de la Universidad de São Paulo. Resultados: Se encontró en esta área, que los artículos de alto impacto brasileños se publican en revistas extranjeras, que también tienen un factor de impacto alto. Se puede decir que hay un círculo vicioso que impide el aumento de factor de impacto de los títulos de revistas brasileñas. Por un lado, los investigadores brasileños deciden publicar sus investigaciones a fin de obtener un mayor impacto en revistas extranjeras con alto factor de impacto (citando los mismos títulos. Por otro lado, las revistas brasileñas - que publican artículos de investigadores brasileños - también reciben citaciones, pero sobre todo de títulos investigadores / revistas brasileñas. Conclusión: La accesibilidad (acceso abierto y visibilidad (indexación por sí solas no son suficientes para aumentar el impacto de las revistas brasileñas de una manera globalizada, para que puedan competir con (impacto y alto títulos extranjeros.

  7. ¿Cognición semántica de alto nivel durante el sueño?

    Directory of Open Access Journals (Sweden)

    Agustín Ibáñez

    2008-07-01

    Full Text Available Estudios neurocientíficos recientes que sugieren una mente activa durante el sueño contradicen la idea platónica del sueño como muerte parcial. Dichos estudios muestran que el cerebro discrimina estímulos complejos durante el sueño, sugiriendo que permanecen activos procesos de alto nivel. Ello genera interrogantes sobre los mecanismos del sueño, replanteando la relación entre cognición y consciencia.

  8. Prevencion y deteccion de los trastornos de alimentacion en deportistas de alto rendimiento (CAR, CEARE y CTD)

    OpenAIRE

    Dosil Díaz, Joaquín; Díaz Ceballos, Isabel; Viñolas Ramisa, Anna

    2012-01-01

    En este trabajo se analizan los factores que determinan el riesgo de que un deportista desarrolle un Trastorno de la Conducta Alimentaria (TCA). Se ha comprobado como el nivel de competición o el tipo de práctica puede influir en que ese riesgo aumente. Dentro de los deportistas que a priori presentan mayor riesgo se encuentran los que compiten en el alto rendimiento, por lo tanto, a través de este trabajo de investigación pretendemos detectar a través del Cuestionario de Há...

  9. Diversificación de patrones en rutinas de solo en natación sincronizada de alto nivel

    OpenAIRE

    Iglesias, Xavier; Rodríguez-Zamora, Lara; Chaverri, Diego; Clapés, Pilar; Rodríguez, Ferran A.; Anguera Argilaga, Mª Teresa

    2015-01-01

    El objetivo del presente estudio es determinar y caracterizar la existencia de diferencias estructurales y T-Patterns en la disposición corporal entre las rutinas de solo técnico y libre en la natación sincronizada de alto nivel. Se utilizó un diseño observacional puntual, nomotético y multidimensional. El instrumento de registro fue el programa LINCE v. 1.1. La fiabilidad en la observación se determinó mediante el grado de concordancia intra e interobservador con valores de...

  10. Reparación del ligamento cruzado anterior en rodillas con alto potencial de crecimiento. Estudio experimental

    OpenAIRE

    Calvente Nomdedeu, Alejandro

    2005-01-01

    RESUMEN INTRODUCCIÓN La rotura del ligamento cruzado anterior en individuos con fisis abiertas, aparece en edades cada vez más tempranas, con frecuencia creciente. Una reparación anatómica, con un riesgo mínimo de lesión fisaria, sería la técnica ideal. OBJETIVOS Principal: 1ª Parte: estudiar el efecto de la perforación transfisaria femoral distal en individuos con alto potencial de crecimiento y el posible efecto protector del injerto tendinoso. 2ª Parte: investigar las variacion...

  11. Diagnosis by Teledermatology of a patient from the Alto Solimões River: a case of Crusted Scabies

    Directory of Open Access Journals (Sweden)

    Anderson da Paz Penha

    2013-04-01

    Full Text Available Teledermatology uses telecommunication technology and informatics on dermatologic practice without the presence of a specialist. This paper describes the diagnostic process of a Crusted Scabies (Norwegian Scabies case in an elderly patient from the Alto Solimões River region using teledermatology resources. Moreover, the authors discuss the progress of these technologies, which allow healthcare assistance for those living in remote indigenous and riverine communities, particularly in isolated areas of the Legal Amazon where many diseases are neglected or underdiagnosed.

  12. Armonización entre proceso de aprendizaje y práctica deportiva en universitarios deportistas de alto nivel

    OpenAIRE

    Álvarez Pérez, Pedro R.; David López Aguilar

    2012-01-01

    Este trabajo se ha centrado en el análisis de las dificultadesque los estudiantes universitarios deportistas de alto nivel encuentran para conciliar su proceso formativo con la práctica deportiva de alta competición. Sin una ayuda adecuada para gestionar la alternancia de esta doble actividad, muchos de estos estudiantes pueden verse abocados a situaciones de estrés, fracaso oabandono de los estudios o del deporte. Por eso, el objetivo de la investigación se orientó al diagnóstico de lascon...

  13. Prescrição de terapias baseadas em evidências para pacientes de alto risco cardiovascular: estudo REACT

    Directory of Open Access Journals (Sweden)

    Otávio Berwanger

    2013-03-01

    Full Text Available FUNDAMENTO: Dados de atendimento ambulatorial ao paciente de alto risco cardiovascular no Brasil são insuficientes. OBJETIVO: Descrever o perfil e documentar a prática clínica do atendimento ambulatorial de pacientes de alto risco cardiovascular no Brasil, no que diz respeito à prescrição de terapias baseadas em evidências. MÉTODOS: Registro prospectivo que documentou a prática clínica ambulatorial de indivíduos de alto risco cardiovascular, que foi definido como a presença de um dos seguintes fatores: doença arterial coronariana, cerebrovascular e vascular periférica; diabetes; ou aqueles com pelo menos três dos seguintes fatores: hipertensão arterial, tabagismo, dislipidemia, maiores 70 anos, histórico familiar de doença arterial coronariana, nefropatia crônica ou doença carotídea assintomática. Foram avaliadas características basais e a taxa de prescrição das intervenções medicamentosas e não medicamentosas. RESULTADOS: Foram incluídos 2.364 pacientes consecutivos, sendo 52,2% do gênero masculino, idade média de 66,0 anos (± 10,1. Dentre os pacientes incluídos, 78,3% utilizavam antiplaquetários, 77,0% estatinas e, dos pacientes com história de infarto do miocárdio, 58,0% receberam betabloqueadores. O uso concomitante destas três classes foi de 34%. Não atingiram as metas preconizadas pelas diretrizes 50,9% dos hipertensos, 67% dos diabéticos e 25,7% dos dislipidêmicos. Os principais preditores de prescrição de terapias com benefício comprovado foram centro com cardiologista e histórico de doença arterial coronariana. CONCLUSÃO: Este registro nacional e representativo identificou hiatos importantes na incorporação de terapias com benefício comprovado, oferecendo um panorama real dos pacientes de alto risco cardiovascular.

  14. AVALIAÇÃO SENSORIAL DE BARRAS DE CEREAIS DE CAJU AMEIXA COM ALTO TEOR DE FIBRAS

    OpenAIRE

    Luísa Helena Ellery MOURÃO; Dorasílvia Ferreira PONTES; Maria do Carmo Passos RODRIGUES; Isabela Montenegro BRASIL; Maria Thays Barroso CAVALCANTE

    2012-01-01

    Considerando o crescimento do segmento de barras de cereais no setor de alimentos este trabalho teve como objetivos desenvolver barras de cereais de caju ameixa com alto teor de fibras e realizar análise sensorial. Formulou-se 2 tipos de barras, (F1) e (F2) a partir de uma formulação básica (FB). A FB foi processada utilizando-se aveia, flocos de arroz, leite em pó desnatado, açúcar mascavo, glucose de milho, gordura vegetal hidrogenada, canela, lecitina de soja e floc...

  15. Modelación del nivel de ácido láctico para atletas de alto rendimiento

    OpenAIRE

    M. A. Leminszka; G. Dieck-Assad; S. O. Martínez; J. E. Garza

    2010-01-01

    El presente trabajo propone un modelo para la medición de ácido láctico de manera no invasiva. El modelo puede usarse de manera efectiva para medir ácido láctico en atletas de alto rendimiento. Se presentan diversos modelos que tratan de resolver el problema haciendo una correlación de variables físicas medibles. Los resultados indican que los modelos predicen en forma efectiva la cantidad de lactato en las pruebas físicas aplicadas a tres atletas. En las pruebas de campo presentadas el model...

  16. Propuesta de planificación y periodización para un competidor de crossfit de alto nivel

    OpenAIRE

    Mirón Aguilar, Fernando

    2014-01-01

    Este trabajo tratará de plantear un modelo de planificación válido para Crossfit, más concretamente para un competidor de alto nivel que tiene el objetivo de acudir a los Crossfit Games. Mediante la revisión de la literatura científica relacionada se propondrá un modelo que pueda conjugar todas las capacidades requeridas por el crossfiter de élite, para que estas puedan ser desarrolladas de una manera más o menos conjunta y le permitan llegar en su máximo de rendimiento a cada una d...

  17. Estudio farmacoepidemiológico de uso de antiinflamatorios no esteroideos en pacientes de alto riesgo cardiovascular

    OpenAIRE

    Jorge Enrique Machado-Alba; Verónica Alzate-Carvajal; Luis Echeverri-Cataño

    2013-01-01

    Con el objetivo de determinar la frecuencia de uso prolongado de antiinflamatorios no esteroideos (AINES) en pacientes colombianos de alto riesgo cardiovascular (ARC) se desarrolló un estudio retrospectivo en el cual se identificaron pacientes de ARC que usaron AINES por más de cinco meses continuos entre enero de 2011 y marzo de 2013. Se identificó a los pacientes que recibían crónicamente nitratos, digitálicos, y clopidogrel y ácido acetil salicílico (ASA), quienes fueron identificados como...

  18. Safeguarding research reactors

    International Nuclear Information System (INIS)

    The report is organized in four sections, including the introduction. The second section contains a discussion of the characteristics and attributes of research reactors important to safeguards. In this section, research reactors are described according to their power level, if greater than 25 thermal megawatts, or according to each fuel type. This descriptive discussion includes both reactor and reactor fuel information of a generic nature, according to the following categories. 1. Research reactors with more than 25 megawatts thermal power, 2. Plate fuelled reactors, 3. Assembly fuelled reactors. 4. Research reactors fuelled with individual rods. 5. Disk fuelled reactors, and 6. Research reactors fuelled with aqueous homogeneous fuel. The third section consists of a brief discussion of general IAEA safeguards as they apply to research reactors. This section is based on IAEA safeguards implementation documents and technical reports that are used to establish Agency-State agreements and facility attachments. The fourth and last section describes inspection activities at research reactors necessary to meet Agency objectives. The scope of the activities extends to both pre and post inspection as well as the on-site inspection and includes the examination of records and reports relative to reactor operation and to receipts, shipments and certain internal transfers, periodic verification of fresh fuel, spent fuel and core fuel, activities related to containment and surveillance, and other selected activities, depending on the reactor

  19. Research nuclear reactors

    International Nuclear Information System (INIS)

    Since the divergence of the first nuclear reactor in 1942, about 600 research or test reactors have been built throughout the world. Today 255 research reactors are operating in 57 countries and about 70% are over 25 years old. Whereas there are very few reactor types for power plants because of rationalization and standardisation, there is a great diversity of research reactors. We can divide them into 2 groups: heavy water cooled reactors and light water moderated reactors. Heavy water cooled reactors are dedicated to the production of high flux of thermal neutrons which are extracted from the core by means of neutronic channels. Light water moderated reactors involved pool reactors and slightly pressurized closed reactors, they are polyvalent but their main purposes are material testing, technological irradiations, radionuclide production and neutron radiography. At the moment 8 research reactors are being built in Canada, Germany, Iran, Japan, Kazakhstan, Morocco, Russia and Slovakia and 8 others are planned in 7 countries (France, Indonesia, Nigeria, Russia, Slovakia, Thailand and Tunisia. Different research reactors are described: Phebus, Masurca, Phenix and Petten HFR. The general principles of nuclear safety applied to test reactors are presented. (A.C.)

  20. Nuclear reactor building

    International Nuclear Information System (INIS)

    Purpose: To prevent seismic vibrations of external buildings from transmitting to the side walls of a reactor container in a tank type FBR reactor building. Constitution: The reactor building is structured such that the base mat for a reactor container chamber and a reactor container is separated from the base mat for the walls of building, and gas-tight material such as silicon rubber is filled in the gap therebetween. With such a constitution, even if the crane-supporting wall vibrates violently upon occurrence of earthqualkes, the seismic vibrations do not transmit toward the reactor container chamber. (Horiuchi, T.)

  1. El caso de la Federación de Comunidades Negras del Alto San Lorenzo

    Directory of Open Access Journals (Sweden)

    John Herlyn Antón Sánchez

    2015-10-01

    Full Text Available En 1994, con la Ley de Desarrollo Agrario, el Estado ecuatoriano otorgó 127.279,28 ha de tierras para uso colectivo a 37 comunidades afroecuatorianas campesinas en elnorte de Esmeraldas. Veinte años después, estas tierras sufren fuertes presiones por la penetración de capitales con fines extractivistas y agroindustriales. Este artículo realiza un examen de la situación de presión sobre dichos territorios y evidencia una pérdida sustancial de los mismos por parte de las comunidades. Esto ha generado graves consecuenciasque atentan contra la cultura, la seguridad alimentaria y el equilibrio entre prácticas sustentables de producción y la conservación de la naturaleza. De forma paradójica, la vulneración al derecho al territorio se produce en un contexto en el que el Ecuador cambia su modelo de Estado, pasando de monocultural a multiétnico, con la Constitución de 2008, y a plurinacional e intercultural, con la Constitución del 2008. Estos marcos normativos consagran a los afrodescendientes como pueblo y como titulares de veintiún derechos colectivos.La investigación se llevó a cabo en el norte de la provincia de Esmeraldas, en los cantones San Lorenzo y Eloy Alfaro. En concreto, en las comunas territoriales asociadas a la Federación de Comunas Negras del Alto San Lorenzo (Fecona, que hace parte de la Comarca Afroecuatoriana del Norte de Esmeraldas (Cane. Esta comarca es una red de organizaciones de base étnico-territoriales que defienden los derechos al territorio ancestral afrodescendiente en Ecuador. En el norte de Esmeraldas, precisamente, se desarrolla una importante experiencia de defensa del derecho al territorio ancestral afrodescendiente del Ecuador. Gracias a las luchas de las organizaciones campesinas afroecuatorianas, el Estado ha implementado una serie de derechos para la preservación y el fortalecimiento de su identidad, tradiciones y formas de organización social. Este reconocimiento viabiliza

  2. Estudio geoeléctrico en el valle alto del Rio Patía

    Directory of Open Access Journals (Sweden)

    Pérez Cerón Rosalbina

    1995-10-01

    Full Text Available

    The resistivity survey carried out at the upper valley of the Patía River, provided good information to define the sedimentary sequence of the area. A general sequence from top to base is described as follows: recent deposits with resistivity values between 20 and 400 Ohrn-m, fine to medium grain, sandstones with resistivity values between 20 and 70 Ohrn-m, fine grain sandstones and silstones with resistivity values between 8 and 20 Ohrn-rn, and clayli basement, with resistivity less than 20 Ohm-m. There are two kinds of aquifers; free, related to sands and gravels from alluvial fans and terraces (resistivity values between 70 and 400 Ohrn-m and thickness between 25 and 75, semi-confined related to tertiary sandstones (resistivities values between 20 and 30 Ohm-m, thickness between 35 and 150 m. The water quality of the upper aquifers is good enough with small amounts of salt content. Saline water is found at the lower aquifer.

    The resistivity method was useful to locate geological discontinuities; some of them found with surface expression associated with lineaments and faults. Some of these geological features have been mapped in previous geological works on the area. In general the interpretation based on the resistivity results shows a block tectonics environment affecting cretaceous and tertiary rocks and probably the quaternary deposit.

    La prospección eléctrica en el valle alto del Rio Patía, permitió definir una secuencia típica constituida de techo a base por

  3. Empresas electrónicas de alto potencial de crecimiento: Posicionamiento financiero ante retos de futuro

    Directory of Open Access Journals (Sweden)

    Nuria Arimany-Serrat

    2016-02-01

    Full Text Available Objetivo: La investigación posiciona les empresas electrónicas españolas a nivel financiero en el período 2011-2013 en el marco del espacio europeo; ya que el futuro mundo empresarial pasa por el progreso tecnológico y el impacto de las empresas electrónicas es decisivo y por tanto conocer su posición a nivel español y su situación económica financiera en los últimos años nos ayuda a delimitar como podrán afrontar los retos de futuro. Diseño/metodología/enfoque: Los datos que hemos utilizado para esta investigación, recogen los datos económicos financieros de una muestra de empresas electrónicas españolas consideradas de alto crecimiento ya que tienen un crecimiento del ROA mínimo del 3% y un crecimiento de los ingresos de explotación en el período analizado mínimo del 6%. Sobre estas compañías se lleva a cabo un análisis económico financiero y un estudio estadístico descriptivo con modelos de regresión para determinar resultados y conclusiones al respecto. Resultados: El estudio nos permite determinar la salud económica financiera de las empresas electrónicas que concentran un 97% de las ventas en España y determina variables financieras, de género y de innovación que inciden en los resultados de este sector empresarial, para determinar su sintonía en perspectiva europea. Limitaciones: Sería conveniente ampliar la muestra a otras empresas tecnológicas, a parte de la electrónicas, y ampliar el período temporal utilizado hasta el ejercicio 2014, aunque los datos no están disponibles en la base de datos SABI utilizada. Implicaciones prácticas: El trabajo permite valorar la proyección a nivel económico financiero de las empresas electrónicas en estos últimos años en España en relación con la situación europea, para poder valorar si podrán afrontar los retos de futuro inminentes. Implicaciones sociales: Los resultados permiten valorar los cambios a nivel económico financiero de estas empresas para

  4. Reactor Physics Programme

    International Nuclear Information System (INIS)

    The Reactor Physics and Department of SCK-CEN offers expertise in various areas of reactor physics, in particular in neutronics calculations, reactor dosimetry, reactor operation, reactor safety and control and non-destructive analysis on reactor fuel. This expertise is applied within the Reactor Physics and MYRRHA Research Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 reactor dosimetry, and the preparation and interpretation of irradiation experiments. Progress and achievements in 1999 in the following areas are reported on: (1) investigations on the use of military plutonium in commercial power reactors; (2) neutron and gamma calculations performed for BR-2 and for other reactors; (3) the updating of neutron and gamma cross-section libraries; (4) the implementation of reactor codes; (6) the management of the UNIX workstations; and (6) fuel cycle studies

  5. O suicídio Tikúna no Alto Solimões: uma expressão de conflitos

    Directory of Open Access Journals (Sweden)

    Regina M. de Carvalho Erthal

    2001-03-01

    Full Text Available O objetivo deste trabalho é buscar um entendimento a respeito da ocorrência de suicídios entre os índios Tikúna do Alto Solimões (Amazonas, um objeto de difícil aproximação e que aponta para a necessidade de abordagem interdisciplinar. A etnografia realizada preocupou-se em captar a vinculação entre os eventos de suicídio da última década com a exacerbação dos confrontos entre diferentes grupos faccionais que atualizam, em outro contexto histórico, os mecanismos de resolução de conflitos próprios das antigas malocas. Na base desses confrontos está o abandono a que tal população tem sido submetida pelos órgãos responsáveis pela definição e implementação das políticas públicas para as populações indígenas, com especial destaque para a falência do modelo de assistência proposto para a área do Alto Solimões.

  6. Caracterización de carbones para la inyección por toberas en el horno alto

    Directory of Open Access Journals (Sweden)

    Babich, A.

    1998-05-01

    Full Text Available The efficiency of blast furnace operation with pulverized coal injection (PCI by tuyeres is determined by the composition and properties of the used coals and by the quality of the ferrous burden and coke. A study in thermobalance of coals to be injected by tuyeres is carried out, and the softening and melting temperatures of coals ash are determined. The coal performance and its influence in the blast furnace operation is estimated.

    La eficacia de la operación del horno alto con inyección de carbón pulverizado (ICP por toberas, está determinada por la composición y propiedades de los carbones utilizados y por la calidad de la carga férrea y del coque. Se realiza el estudio en termobalanza de carbones destinados a la inyección por toberas y se determinan las temperaturas de reblandecimiento y fusión de la ceniza de estos carbones. Se estima el comportamiento de los carbones y su influencia en la operación del horno alto.

  7. Avances en la regulación y control del estado térmico del horno alto

    Directory of Open Access Journals (Sweden)

    Babich, A.

    1997-04-01

    Full Text Available An automated system of direction (SAD for the control of the thermal state of the hearth of the blast furnace is used, taking into account the interrelation existing between the pig iron temperature and its silicon content. By the magnitude of the thermal exergy of the process, which determines the heat work capacity the variations in the heating of the hearth can be valued and carried out the necessary control and regulation actions, such as the variations in the pulverized coal injection and in the sinter/coke relation in the melting bed of the blast furnace.

    Se utiliza un sistema automatizado de dirección (SAD para el control del estado térmico del crisol del horno alto, teniendo en cuenta la relación que existe entre la temperatura del arrabio y su contenido de silicio. Por la magnitud de la exergía térmica del proceso, que determina la capacidad de trabajo del calor, se pueden valorar las variaciones de calentamiento del crisol y realizar las acciones necesarias de control y regulación, como son las variaciones en la inyección de carbón pulverizado y en la relación sinterizado/coque en el lecho de fusión del horno alto.

  8. Angioplastia del tronco de la arteria coronaria izquierda no protegido en pacientes con alto riesgo quirúrgico

    Directory of Open Access Journals (Sweden)

    Victor Mauro

    2008-01-01

    Full Text Available IntroducciónEl tratamiento de elección de la enfermedad del tronco de la coronaria izquierda (TCI es la cirugía de revascularización miocárdica (CRM. Un número creciente de pacientes presenta comorbilidades y/o inestabilidad clínica que condicionan un alto riesgo quirúrgico.ObjetivosEvaluar los resultados de la angioplastia (ATC del TCI no protegido en pacientes con alto riesgo para CRM (EUROSCORE = 6.Material y métodosDe 59 pacientes con ATC de TCI no protegido se excluyeron 8 con infarto agudo de miocardio (IAM en shock cardiogénico y 12 sin características de alto riesgo; de los restantes pacientes de alto riesgo fueron objeto de este estudio los 32 tratados con stents convencionales.Se comparó la mortalidad hospitalaria predicha por EUROSCORE logístico con la observada, así como la incidencia de complicaciones mayores y su evolución alejada.ResultadosLa mediana de edad fue de 76,5 años, el 41% tenía 80 años o más, el 22% eran mujeres, el 28% diabéticos, el 56% tenía disfunción ventricular moderada a grave, el 31% insuficiencia renal crónica, el 50% vasculopatía periférica, el 53% angina refractaria, el 22% IAM reciente, el 28% procedimientos de emergencia y la mediana de EUROSCORE fue de 10,5 puntos.El 41% de los pacientes presentaban compromiso del TCI distal. El éxito angiográfico fue del 94%. Se utilizaron inhibidores IIb/IIIa en el 47%, cutting balloon en el 28%, Rotablator® en el 3% y balón de contrapulsación en el 31%. En todos se implantó un stent y en el 50% se trataron otras obstrucciones.La mortalidad hospitalaria fue del 3,1% (intervalo de confianza del 95% 0,2%-14,5%, p = 0,003, en tanto que la predicha era del 23,8%. Ningún paciente presentó déficit neurológico, IAM transmural ni requirió diálisis. Un paciente debió ser sometido a CRM electiva por fracaso del procedimiento.La mediana de seguimiento fue de 15,5 meses, período en el que se registraron 6 muertes (2 cardiovasculares y 4

  9. Adenomas colorretais: fatores de risco associados à displasia de alto grau Colorectal adenomas: risk factors for high-grade dysplasia

    Directory of Open Access Journals (Sweden)

    Julia Schmidt Silva

    2009-06-01

    Full Text Available FUNDAMENTOS: O estudo dos pólipos, em especial os adenomatosos, é relevante devido à correlação direta com o carcinoma colorretal. Objetivo: Analisar quais são os fatores de risco para uma displasia de alto grau do pólipo adenomatoso retirados endoscopicamente. MÉTODOS: Avaliamos todas as colonoscopias realizadas pelo Serviço de Coloproctologia no período de janeiro de 2003 a dezembro de 2006. Foram incluídos os pacientes com diagnóstico de pólipos adenomatosos. Analisamos a existência da relação entre adenomas com displasia de alto grau e os fatores associados dos pacientes e pólipos. RESULTADOS: Foram realizados 1821 exames e encontramos 208 pacientes com 326 adenomas. 51,4% do sexo masculino e 69,2% tinham um único adenoma. Foram encontrados 28 pacientes (13,5% com, ao total, 34 adenomas (10,4%, com displasia de alto grau. Entre os adenomas com displasia de alto grau, 64,7% eram = 1cm, 61,8% eram sésseis, 29,4% vilosos e 70,6% estavam localizados no cólon esquerdo. Comparando as características do grupo dos adenomas com displasia de baixo grau com o de alto grau, foi estatisticamente significativo o tamanho = 1cm e o componente viloso (P BACKGROUND: The study of polyps, especially adenomatous, is justified because of the straight correlation among them with the incidence of CRC. Objective: To analyze the risk factors for high-grade dysplasia of adenomatous polyps removed endoscopically. METHODS: All consecutive colonoscopies performed by the Colorectal Department of the Hospital Nossa Senhora da Conceição, in Porto Alegre/RS, from January 2003 to December 2006, were evaluated. Patients diagnosed with adenomatous polyps were included. The relationship among tumors with high-grade dysplasia and the features of the patients and polyps were analyzed. RESULTS: Among the 1,821 exams, 326 adenomas were detected in 208 patients. 51.4% of the patients were male; 69,2% had only one adenoma. A total of 28 patients (13,5% with 34

  10. Ship propulsion reactors technology

    International Nuclear Information System (INIS)

    This paper takes the state of the art on ship propulsion reactors technology. The french research programs with the corresponding technological stakes, the reactors specifications and advantages are detailed. (A.L.B.)

  11. Undergraduate reactor control experiment

    International Nuclear Information System (INIS)

    A sequence of reactor and related experiments has been a central element of a senior-level laboratory course at Pennsylvania State University (Penn State) for more than 20 yr. A new experiment has been developed where the students program and operate a computer controller that manipulates the speed of a secondary control rod to regulate TRIGA reactor power. Elementary feedback control theory is introduced to explain the experiment, which emphasizes the nonlinear aspect of reactor control where power level changes are equivalent to a change in control loop gain. Digital control of nuclear reactors has become more visible at Penn State with the replacement of the original analog-based TRIGA reactor control console with a modern computer-based digital control console. Several TRIGA reactor dynamics experiments, which comprise half of the three-credit laboratory course, lead to the control experiment finale: (a) digital simulation, (b) control rod calibration, (c) reactor pulsing, (d) reactivity oscillator, and (e) reactor noise

  12. Process heat reactors

    International Nuclear Information System (INIS)

    The consumption of heat, for industrial and domestic needs, takes up half of the national energy supply; direct utilization of the heat produced by nuclear reactors could therefore contribute to reduce the deficit in the energetic results. The restraints proper to heat consumption (dispersal and variety of consumers, irregular demand) involve the development of the heat transport system structures and adequate nuclear reactors. With this in view, the Commissariat a l'Energie Atomique and Technicatome are developing the CAS reactor series, pressurized water reactors (PWR), (CAS 3G reactor with a power of 420 MW.th.), and the Thermos reactor (100 MW.th.), directly conceived to produce heat at 1200C and whose technology derives from the experimental pool reactors type. In order to prove the value of the Thermos design, an experimental reactor should soon be constructed in the Saclay nuclear research centre

  13. Reactor System Design

    International Nuclear Information System (INIS)

    SMART NPP(Nuclear Power Plant) has been developed for duel purpose, electricity generation and energy supply for seawater desalination. The objective of this project IS to design the reactor system of SMART pilot plant(SMART-P) which will be built and operated for the integrated technology verification of SMART. SMART-P is an integral reactor in which primary components of reactor coolant system are enclosed in single pressure vessel without connecting pipes. The major components installed within a vessel includes a core, twelve steam generator cassettes, a low-temperature self pressurizer, twelve control rod drives, and two main coolant pumps. SMART-P reactor system design was categorized to the reactor coe design, fluid system design, reactor mechanical design, major component design and MMIS design. Reactor safety -analysis and performance analysis were performed for developed SMART=P reactor system. Also, the preparation of safety analysis report, and the technical support for licensing acquisition are performed

  14. Nuclear Reactor RA Safety Report, Vol. 11, Reactor operation

    International Nuclear Information System (INIS)

    This volume includes the following chapters describing: Organisation of reactor operation (including operational safety, fuel management, and regulatory rules for RA reactor operation); Control and maintenance of reactor components (reactor core, nuclear fuel, heavy water and cover gas systems, mechanical structures, electric power supply system, reactor instrumentation); Quality assurance and Training of the reactor personnel

  15. Caracterização morfológica do poliestireno de alto impacto (HIPS Morphological characterization of high impact psolystyrene (HIPS

    Directory of Open Access Journals (Sweden)

    Juliana Rovere

    2008-03-01

    Full Text Available Poliestireno de alto impacto (HIPS é uma blenda polimérica clássica de reator produzida por polimerização in-situ de estireno em solução com borracha butadiênica. Na literatura, está bem estabelecida a importância do tamanho de partícula e da densidade da ligação cruzada da borracha na capacidade de cavitação e no controle dos mecanismos de tenacificação na matriz estirênica. No presente trabalho as técnicas de microscopia eletrônica de transmissão (MET e espalhamento de luz laser de baixo ângulo (LALLS foram empregadas para observar a distribuição do tamanho de partícula, e a análise digital de imagem foi aplicada para quantificar os parâmetros morfológicos nas micrografias. Medidas do tamanho de partícula e da fração aparente volumétrica de partícula foram feitas para diferentes espessuras na MET e comparadas com o parâmetro estatístico D[4,3] obtido na LALLS.High impact polystyrene (HIPS is a classical reactor polymer blend produced by in-situ polymerization of styrene in solution with polybutadiene rubber. It is well established in the literature the importance of particle size and rubber crosslink density on the particle cavitation capability and on the controlling of toughening mechanisms in the styrene matrix. In the present work transmission electron microscopy (TEM and low-angle laser light scattering (LALLS were employed for investigating particle size distribution, with digital imaging being applied in the quantitative analysis of the micrographs. Measurements of apparent volume fraction and average particle size were carried out for different slice thicknesses in TEM and compared with the statistical parameter D[4,3] obtained by LALLS.

  16. The Chernobylsk reactor accident

    International Nuclear Information System (INIS)

    The construction, the safety philosophy, the major reactor physical parameters of RBMK-1000 type reactor units and the detailed description of the Chernobylsk-4 reactor accident, its causes and conclusions, the efforts to reduce the consequences on the reactor site and in the surroundings are discussed based on different types of Soviet documents including the report presented to the IAEA by the Soviet Atomic Energy Agency in August 1986. (V.N.)

  17. Zero energy reactor 'RB'

    International Nuclear Information System (INIS)

    In 1958 the zero energy reactor RB was built with the purpose of enabling critical experiments with various reactor systems to be carried out. The first core assembly built in this reactor consists of heavy water as moderator and natural uranium metal as fuel. In order to be able to obtain very accurate results when measuring the main characteristics of the assembly the reactor was built as a completely bare system. (author)

  18. High solids fermentation reactor

    Science.gov (United States)

    Wyman, Charles E.; Grohmann, Karel; Himmel, Michael E.; Richard, Christopher J.

    1993-01-01

    A fermentation reactor and method for fermentation of materials having greater than about 10% solids. The reactor includes a rotatable shaft along the central axis, the shaft including rods extending outwardly to mix the materials. The reactor and method are useful for anaerobic digestion of municipal solid wastes to produce methane, for production of commodity chemicals from organic materials, and for microbial fermentation processes.

  19. Fossil nuclear reactors

    Energy Technology Data Exchange (ETDEWEB)

    Maurette, M.

    1976-01-01

    The discussion of fossil nuclear reactors (the Oklo phenomenon) covers the earth science background, neutron-induced isotopes and reactor operating conditions, radiation-damage studies, and reactor modeling. In conclusion possible future studies are suggested and the significance of the data obtained in past studies is summarized. (JSR)

  20. Fusion reactor studies

    International Nuclear Information System (INIS)

    A review is given of fusion reactor systems studies, the objectives of these studies are outlined and some recent conceptual reactor designs are described. The need for further studies in greater depth is indicated so that progress towards a commercial fusion reactor may be consolidated. (U.K.)

  1. Reactor power measuring device

    International Nuclear Information System (INIS)

    The present invention provides a self-powered long detector having a sensitivity over the entire length of a reactor core as an entire control rod withdrawal range of a BWR type reactor, and a reactor power measuring device using a gamma ray thermometer which scarcely causes sensitivity degradation. That is, a hollow protection pipe is disposed passing through the reactor core from the outside of a reactor pressure vessel. The self-powered long detectors and the gamma ray thermometers are inserted and installed in the protection pipe. An average reactor power in an axial direction of the reactor relative to a certain position in the horizontal cross section of the reactor core is determined based on the power of the self-powered long detector over the entire length of the reactor core. Since the response of the self-powered detector relative to a local power change is rapid, the output is used as an input signal to a safety protection device of the reactor core. Further, a gamma ray thermometer secured in the reactor and having scarce sensitivity degradation is used instead of an incore travelling neutron monitor used for relative calibration of an existent neutron monitor secured in the reactor. (I.S.)

  2. ¿El buen entrenador nace o lo hace el deportista? El camino hacia el alto nivel en triatlón

    Directory of Open Access Journals (Sweden)

    Germ\\u00E1n Ruiz Tendero

    2014-01-01

    Full Text Available La figura del entrenador adquiere un peso importante en el sistema deportivo y por tanto en el éxito de sus deportistas. Las claves de su éxito han sido estudiadas desde diferentes perspectivas. El estudio en retrospectiva del recorrido por el cual se llega al alto nivel es una de ellas. El propósito de este estudio fue determinar el camino de los entrenadores de triatlón previo a su llegada al alto nivel, así como las circunstancias en las que se produjo el paso hacia el alto rendimiento. Para ello se entrevistó a una muestra de 14 entrenadores españoles de alto nivel en triatlón. Los resultados muestran un recorrido prevalente en el que el entrenador fue anteriormente deportista y entrenador en alguna/s de las disciplinas fundamentales (DF de las que se compone el triatlón (natación, ciclismo, atletismo, llegando al alto nivel de triatlón con una edad aproximada de 30 años. Los años de experiencia previa varían en función del pasado del entrenador, no llegándose a alcanzar los 10 años de media en ningún caso, hasta el inicio en la etapa de alto nivel. Sería recomendable, por tanto, contextualizar los años de experiencia previos, para optimizar la selección de muestras de entrenadores expertos.

  3. Estimación de la exposición a fluoruros en Los Altos de Jalisco, México Estimation of exposure to fluoride in "Los Altos de Jalisco", México

    Directory of Open Access Journals (Sweden)

    Roberto Hurtado-Jiménez

    2005-02-01

    Full Text Available OBJETIVO: Estimar la exposición a fluoruros y riesgos potenciales a la salud humana en Los Altos de Jalisco, México. MATERIAL Y MÉTODOS: Se midió electroquímicamente la concentración de fluoruros en 105 pozos y seis tomas de agua potable, en los Altos de Jalisco, de mayo a julio de 2002. Se estimó la dosis de exposición y la ingestión total de fluoruros para: bebés de 10 kg, niños de 20 kg y adultos de 70 kg. RESULTADOS: La concentración de fluoruros en las muestras de agua varió entre 0.1 y 17.7 mg/l. El 45% de las muestras excede el límite permitido por la normatividad (1.5 mg/l. La ingestión total y dosis de exposición a fluoruros estimados están en los rangos de 0.5-18.4 mg/d y 0.04-1.8 mg/kg/d, respectivamente. CONCLUSIONES: Una parte importante de la población está expuesta a fluorosis dental, fluorosis esquelética y fracturas óseas. Para reducir los riesgos se debe evitar el consumo de sal fluorada, pastas dentales con flúor y agua potable cuya concentración de fluoruros sea mayor de 0.7 mg/l.OBJECTIVE: To estimate the level of fluoride exposure and human health risks in Los Altos de Jalisco (Jalisco State Heights region. MATERIAL AND METHODS: This study was conducted between May and July 2002. The fluoride concentrations of 105 water wells and six tap water samples were electrochemically measured. Exposure doses to fluoride and total intake of fluoride were estimated for babies (10 kg, children (20 kg, and adults (70 kg. RESULTS: The fluoride concentration of the water samples ranged from 0.1 to 17.7 mg/l. More than 45% of the water samples exceeded the national guideline value for fluoride of 1.5 mg/l. The estimated values of the exposure doses to fluoride and total intake of fluoride were in the range of 0.04-1.8 mg/kg/d and 0.5-18.4 mg/d, respectively. CONCLUSIONS: Dental fluorosis, skeletal fluorosis, and bone fractures are some of the potential health risks due to the intake of high doses of fluoride for the

  4. Fundamentos psicopedagógicos de aplicación en el Centro de Investigación y Desarrollo del Alto Rendimiento en Fútbol (CIDARF)

    OpenAIRE

    Martí Mora, Jaume

    2002-01-01

    El objetivo del presente trabajo es dar a conocer el CIDARF, creado en Barcelona en 1997, haciendo especial hincapié en los aspectos psicológicos y pedagógicos que se trabajan en la entidad. La función del Centro es elaborar un trabajo a largo plazo (10 anos), con el fin de conseguir el más alto nivel deportivo de los jugadores que participan en la experiencia y con el objetivo principal de desarrollar un proceso de investigación de alto nivel, que permita obtener una extensa y contrastada in...

  5. Análise Computadorizada da Cardiotocografia Anteparto em Gestações de Alto Risco Computerized Antepartum Cardiotocography Analysis in High Risk Pregnancies

    OpenAIRE

    Roseli Mieko Yamamoto Nomura; Rossana Pulcineli Vieira Francisco; Débora Simões Steinman; Seizo Miyadahira; Marcelo Zugaib

    2002-01-01

    Objetivos: analisar a freqüência dos resultados das cardiotocografias computadorizadas realizadas em gestantes de alto risco e relacionar o critério proposto pelo sistema com os resultados perinatais. Métodos: estudamos prospectivamente 233 gestantes de alto risco que realizaram 485 cardiotocografias computadorizadas. Foram excluídos casos de anomalias fetais e os exames com perda de sinal superior a 20% (proporção de episódios de 3,75 milissegundos do traçado onde não se constata intervalo d...

  6. CARMENES: Calar Alto high-Resolution search for M dwarfs with Exo-earths with a Near-infrared Echelle Spectrograph

    CERN Document Server

    Quirrenbach, A; Mandel, H; Caballero, J A; Ribas, I; Reiners, A; Mundt, R; Abril, M; Afonso, C; Bean, J L; Bejar, V J S; Becerril, S; Boehm, A; Cardenas, C; Claret, A; Colome, J; Costillo, L P; Dreizler, S; Fernandez, M; Francisco, X; Garrido, R; Hernandez, J I Gonzalez; Guenther, E W; Gutierrez-Soto, J; Joergens, V; Hatzes, A P; Henning, T; Herrero, E; Kurster, M; Laun, W; Lenzen, R; Mall, U; Martin, E L; Martin-Ruiz, S; Montes, D; Morales, J C; Munoz, R Morales; Moya, A; Naranjo, V; Rabaza, O; Ramon, A; Rebolo, R; Reffert, S; Rodler, F; Rodriguez, E; Trinidad, A Rodriguez; Rohloff, R -R; Carrasco, M A Sanchez; Schmidt, C; Seifert, W; Setiawan, J; Stahl, O; Suarez, J C; Wiedemann, G; del Burgo, C; Galadi, D; Sanchez-Blanco, E; Xu, W

    2009-01-01

    CARMENES, Calar Alto high-Resolution search for M dwarfs with Exo-earths with a Near-infrared Echelle Spectrograph, is a study for a next-generation instrument for the 3.5m Calar Alto Telescope to be designed, built, integrated, and operated by a consortium of nine German and Spanish institutions. Our main objective is finding habitable exoplanets around M dwarfs, which will be achieved by radial velocity measurements on the m/s level in the near-infrared, where low-mass stars emit the bulk of their radiation.

  7. Edifícios altos – problemas associados e análise estrutural de um caso prático

    OpenAIRE

    Pereira, Rui

    2011-01-01

    Com a presente dissertação pretende-se analisar alguns dos problemas associados aos edifícios altos, na fase de projeto, bem como compilar um conjunto de informações e conhecimentos científicos sobre a área abordada. São descritas algumas soluções de sistemas estruturais possíveis de idealizar para edifícios altos. Posteriormente, tendo por base um projeto de estruturas de um edifício com 25 pisos localizado em Luanda, capital de Angola, o objetivo consistiu em analisar estátic...

  8. Prevalencia de infección por virus de papiloma humano (VPH) de alto riesgo y factores asociados en embarazadas derechohabientes del IMSS en el estado de Morelos

    OpenAIRE

    Carlos Hernández-Girón; Smith, Jennifer S.; Attila Lorincz; Emilio Arreola Cháidez; Eduardo Lazcano; Mauricio Hernández-Ávila; Jorge Salmerón

    2005-01-01

    Objetivo. Algunos estudios sugieren la posibilidad de que el proceso fisiológico del embarazo modifique algunas características del hospedero, lo que incrementa el riesgo de infección por VPH; sin embargo, esta asociación no está bien establecida. Pocos estudios se han realizado para determinar la prevalencia de infección por VPH de alto riesgo en mujeres embarazadas, y sus factores relacionados. El presente estudio busca determinar la prevalencia de infección por VPH de alto riesgo, en una m...

  9. Lesión eléctrica de alto voltaje en cabeza y extremidades en paciente de 15 años

    OpenAIRE

    R. Tarragona-Fernández; I. Ferreiro-González; F.J. Gabilondo-Zubizarreta

    2015-01-01

    Las lesiones eléctricas de alto voltaje son poco frecuentes en nuestro medio, pero resultan altamente mutilantes y constituyen por si mismas un criterio de ingreso del paciente en la Unidad de Grandes Quemados. Presentamos el caso clínico de una adolescente de 15 años que sufre quemaduras eléctricas de alto voltaje. Tras la resucitación y estabilización inicial, la paciente requirió 5 intervenciones quirúrgicas para el tratamiento de sus lesiones, incluyendo una amputación escápulo-humeral pa...

  10. Light water reactor safety

    CERN Document Server

    Pershagen, B

    2013-01-01

    This book describes the principles and practices of reactor safety as applied to the design, regulation and operation of light water reactors, combining a historical approach with an up-to-date account of the safety, technology and operating experience of both pressurized water reactors and boiling water reactors. The introductory chapters set out the basic facts upon which the safety of light water reactors depend. The central section is devoted to the methods and results of safety analysis. The accidents at Three Mile Island and Chernobyl are reviewed and their implications for light wate

  11. Nuclear reactor repairing device

    International Nuclear Information System (INIS)

    Purpose: To enable free repairing of an arbitrary position in an LMFBR reactor. Constitution: A laser light emitted from a laser oscillator installed out of a nuclear reactor is guided into a portion to be repaired in the reactor by using a reflecting mirror, thereby welding or cutting it. The guidance of the laser out of the reactor into the reactor is performed by an extension tube depending into a through hole of a rotary plug, and the guidance of the laser light into a portion to be repaired is performed by the transmitting and condensing action of the reflecting mirror. (Kamimura, M.)

  12. Fundamentals of reactor chemistry

    International Nuclear Information System (INIS)

    In the Nuclear Engineering School of JAERI, many courses are presented for the people working in and around the nuclear reactors. The curricula of the courses contain also the subject material of chemistry. With reference to the foreign curricula, a plan of educational subject material of chemistry in the Nuclear Engineering School of JAERI was considered, and the fundamental part of reactor chemistry was reviewed in this report. Since the students of the Nuclear Engineering School are not chemists, the knowledge necessary in and around the nuclear reactors was emphasized in order to familiarize the students with the reactor chemistry. The teaching experience of the fundamentals of reactor chemistry is also given. (author)

  13. Nuclear reactor physics

    CERN Document Server

    Stacey, Weston M

    2010-01-01

    Nuclear reactor physics is the core discipline of nuclear engineering. Nuclear reactors now account for a significant portion of the electrical power generated worldwide, and new power reactors with improved fuel cycles are being developed. At the same time, the past few decades have seen an ever-increasing number of industrial, medical, military, and research applications for nuclear reactors. The second edition of this successful comprehensive textbook and reference on basic and advanced nuclear reactor physics has been completely updated, revised and enlarged to include the latest developme

  14. The Alto Moxoto Terrain in Eastern Paraiba ('Caldas Brandao Massif'); O Terreno Alto Moxoto no leste da Paraiba ('Macico Caldas Brandao')

    Energy Technology Data Exchange (ETDEWEB)

    Neves, Benjamim Bley de Brito; Campos Neto, Mario da Costa; Souza, Solange Lucena de [Sao Paulo Univ., SP (Brazil). Inst. de Geociencias]. E-mail: bbleybn@usp.br; camposnt@usp.br; slsouza@usp.br; Schmus, William Randall Van [Kansas Univ., Lawrence, KS (United States). Dept. of Geology]. E-mail: rvschmus@eagle.cc.ukans.edu; Fernandes, Tania Maria Gomes [UNESP, Rio Claro, SP (Brazil). Inst. de Geociencias e Ciencias Exatas]. E-mail: taniamg@rcunesp.br

    2001-06-01

    The Alto Moxoto Terrane (TAM), at the east of Paraiba State is mostly composed of sheared ortho gneisses, porphyritic granodioritic gneisses and it bears an imbricated sheet of Al-rich (garnet-biotite-sillimanite) gneisses, deeply affected by migmatization phenomena. This litho-structural assemblage is drawing a regional asymmetric anti formal structure, with its axial zone running parallel to the B R-230 highway (E-W trending). It is limited in both, north (Alto Pajeu terrane) and south (Rio Capibaribe terrane) sides by important shear zones, which are feather faults connected with the development of the Pernambuco lineament, to the southwest. The adopted designation of 'terrane' is based upon its singular geological features, in terms of lithological and structural characteristics, Paleoproterozoic in age and sharp limits with the different confining terranes. TAM is here considered as a mega-fragment of the Atlantica Super continent, that was built up by the Paleoproterozoic Collage ('Transamazonian') and that was preserved in the framework of West Gondwana (Brasiliano/Pan African Collage) as a 'terrane'. This terrane shows conspicuous continuity to the far interior of the province, to the southwestern part of Pernambuco State, and so doing, it demonstrates that the former designation of 'Caldas Brandao Massif must be ruled out, as obsolete for many reasons. Geochronological determinations using Rb-Sr, Sm-Nd and U-Pb methods confirm the Paleoproterozoic age of this terrane, with the presence of some Archean protoliths as well as the various degrees of structural reworking and isotopic reseting promoted by the Brasiliano Cycle. This cycle was responsible for some intrusive granites, for most of the general geological features, like usual informal limits and even the present shape of the TAM, a typical reworked 'basement inlier'. (author)

  15. Generation III+ Reactor Portfolio

    International Nuclear Information System (INIS)

    While the power generation needs of utilities are unique and diverse, they are all faced with the double challenge of meeting growing electricity needs while curbing CO2 emissions. To answer these diverse needs and help tackle this challenge, AREVA has developed several reactor models which are briefly described in this document: The EPRTM Reactor: designed on the basis of the Konvoi (Germany) and N4 (France) reactors, the EPRTM reactor is an evolutionary model designed to achieve best-in-class safety and operational performance levels. The ATMEA1TM reactor: jointly designed by Mitsubishi Heavy Industries and AREVA through ATMEA, their common company. This reactor design benefits from the competencies and expertise of the two mother companies, which have commissioned close to 130 reactor units. The KERENATM reactor: Designed on the basis of the most recent German BWR reactors (Gundremmingen) the KERENATM reactor relies on proven technology while also including innovative, yet thoroughly tested, features. The optimal combination of active and passive safety systems for a boiling water reactor achieves a very low probability of severe accident

  16. The Maple reactor project

    International Nuclear Information System (INIS)

    MDS Nordion supplies the majority of the world's reactor-produced medical isotopes. These isotopes are currently produced in the NRU reactor at AECL's Chalk River Laboratories (CRL). Medical isotopes and related technology are relied upon around the world to prevent, diagnose and treat disease. The NRU reactor, which has played a key role in supplying medical isotopes to date, has been in operation for over 40 years. Replacing this aging reactor has been a priority for MDS Nordion to assure the global nuclear medicine community that Canada will continue to be a dependable supplier of medical isotopes. MDS Nordion contracted AECL to construct two MAPLE reactors dedicated to the production of medical isotopes. The MDS Nordion Medical Isotope Reactor (MMIR) project started in September 1996. This paper describes the MAPLE reactors that AECL has built at its CRL site, and will operate for MDS Nordion. (author)

  17. High temperature reactors

    International Nuclear Information System (INIS)

    With the advent of high temperature reactors, nuclear energy, in addition to producing electricity, has shown enormous potential for the production of alternate transport energy carrier such as hydrogen. High efficiency hydrogen production processes need process heat at temperatures around 1173-1223 K. Bhabha Atomic Research Centre (BARC), is currently developing concepts of high temperature reactors capable of supplying process heat around 1273 K. These reactors would provide energy to facilitate combined production of hydrogen, electricity, and drinking water. Compact high temperature reactor is being developed as a technology demonstrator for associated technologies. Design has been also initiated for a 600 MWth innovative high temperature reactor. High temperature reactor development programme has opened new avenues for research in areas like advanced nuclear fuels, high temperature and corrosion resistant materials and protective coatings, heavy liquid metal coolant technologies, etc. The paper highlights design of these reactors and their material related requirements

  18. Spinning fluids reactor

    Science.gov (United States)

    Miller, Jan D; Hupka, Jan; Aranowski, Robert

    2012-11-20

    A spinning fluids reactor, includes a reactor body (24) having a circular cross-section and a fluid contactor screen (26) within the reactor body (24). The fluid contactor screen (26) having a plurality of apertures and a circular cross-section concentric with the reactor body (24) for a length thus forming an inner volume (28) bound by the fluid contactor screen (26) and an outer volume (30) bound by the reactor body (24) and the fluid contactor screen (26). A primary inlet (20) can be operatively connected to the reactor body (24) and can be configured to produce flow-through first spinning flow of a first fluid within the inner volume (28). A secondary inlet (22) can similarly be operatively connected to the reactor body (24) and can be configured to produce a second flow of a second fluid within the outer volume (30) which is optionally spinning.

  19. Topolitossequências de solos do Alto Paranaíba: atributos físicos, químicos e mineralógicos Topolitosequences of soils in Alto Paranaíba region: physical, chemical and mineralogical properties

    Directory of Open Access Journals (Sweden)

    Fernando Cartaxo Rolim Neto

    2009-12-01

    Full Text Available Pouco se conhece sobre a diferenciação pedogenética no Alto Paranaíba (MG, quando são comparados materiais de composição química tão variada, como tufitos, rochas ígneas alcalinas e ultramáficas e carbonatitos, todos de ocorrência na região. Dessa forma, este trabalho teve como objetivo caracterizar física, química e mineralogicamente os solos representativos de três topolitossequências do Alto Paranaíba. Para isso, foram descritos e coletados 11 perfis de solos, entre os municípios de Serra do Salitre, Patrocínio e Coromandel, representando as variações litológicas na faixa do contato geológico entre os grupos Bambuí, rochas vulcânicas ultramáficas e Araxá. Nas amostras de solos foram realizadas análises físicas e químicas de rotina, além de determinações de Fe, Al e Si após extração por ataque sulfúrico; Fe por DCB e oxalato; Fe, Ca, Mg, K, P, Ti e outros metais pesados após digestão total (ataque triácido; e determinação dos diferentes componentes da fração argila por difratometria de raios X. Os Latossolos do Alto Paranaíba são extremamente intemperizados e com índices Ki e Kr muito baixos, indicativos de solos ricos em óxidos de Fe e de Al, não possuindo uma filiação definida com os materiais de origem subjacente, indicando intensa pedoturbação e provável mistura com materiais alóctones. As assinaturas geoquímicas indicativas da natureza ultramáfica são os teores elevados de Cr, Ni, Mn, Fe e Mg. A mineralogia da fração argila dos Latossolos indica a coexistência de vermiculita com hidroxi-Al entrecamadas, caulinita, gibbsita e anatásio, evidenciando uma gênese policíclica dos minerais da fração mais fina e o elevado grau de intemperismo. Nos Cambissolos, a rápida dessilificação atual conduz à coexistência de gibbsita e óxidos de Fe com esmectitas e illitas, em virtude da rápida ação do intemperismo nos substratos de rochas máficas ou ultramáficas-alcalinas, pobres

  20. Reactor Safety: Introduction

    International Nuclear Information System (INIS)

    The programme of the Reactor Safety Division focuses on the development of expertise on materials behaviour under irradiation for fission and fusion oriented applications. Furthermore, as nuclear energy needs international public acceptance with respect to safety and efficient management of natural resources and wants to reduce the burden of nuclear waste, the Reactor Safety Division enhanced its efforts to develop the MYRRHA project. MYRRHA, an accelerator driven sub-critical system, might have the potential to cope in Europe with the above mentioned constraints on acceptability and might serve as a technological platform for GEN IV reactor development, in particular the Liquid Metal Fast Reactor.The Reactor Safety Division gathers three research entities that are internationally recognised: the Reactor Materials Research department, the Reactor Physics and MYRRHA department and the Instrumentation department.The objectives of Reactor Materials Research are: to evaluate the integrity and behaviour of structural materials and nuclear fuels used in present and future nuclear power industry; to perform research to unravel and understand the parameters that determine the material and fuel behaviour under or after irradiation; to contribute to the interpretation and modelling of the materials and fuels behaviour in order to develop and assess strategies for optimum life management of nuclear power plant components. The programmes within the Reactor Materials Research department concentrate on four distinct disciplines: Reactor Pressure Vessel Steel embrittlement Stress corrosion cracking in reactor coolant environment, including Irradiation Assisted Stress Corrosion Cracking; Nuclear Fuel characterisation and development of new fuel types for commercial and test reactors. Development of materials for Fusion and advanced nuclear fission reactors. The safe operation of present nuclear power plants relies primarily on the integrity of the reactor pressure vessel

  1. MIGRATION AND POPULATION OUTBREAKS OF MILLIPEDES IN THE COFFEE PLANTATIONS, REGION OF ALTO PARANAIBA, MG, BRAZIL

    Directory of Open Access Journals (Sweden)

    Carlos Henrique Silva Penteado

    2002-01-01

    Full Text Available Migrations and population outbreaks of millipedes are phenomena that, due to their unpredictability, have attracted the attention of researchers in order to obtain information for a better understanding of this occurrence and for the adoption of efficient control methods when these arthropods cause damage to urban and cultivated areas.Cloudsley-Thompson (1949 reported that individuals of Fontariavirginensis spread over an area of 75 acres in West Virginia (USA farms in such large numbers that cattle were unable to graze and workers were nauseated by the odor exhaled by dead diplopods. At night and on cloudy days they moved in large numbers; most of them (a number estimated at 65 million animals were killed by the heat of the sun. Niijima e Shinohara (1988, in turn, reported that in Hungary in 1878, in France in 1900, and in Germany in 1906 and 1938, railroad tracks had to be covered with sand for train wheels to be able to adhere to them. In the same article, they pointed out that in Japan the millipede Parafontaria laminata became known by interrupting railroad traffic and emphasized that the population explosions of this millipede occurred at 7 to 8 year intervals and that most of the animals found were adults or sub-adults. This fact has raised speculations about the fact that mating could be a probable cause of such explosions. In Brazil, since the beginning of the 90’s, a population expansion of the millipede Plusioporus setiger (Brolemann, 1901 (Spirostreptida: Spirostreptidae has been observed in coffee plantations in the Alto Paranaíba region, MG (18º37´-19º00´S; 46º52´-47º30´W – a "cerrado" region that was deforested in the 70’s for coffee culture. The infestations probably started in the coffee plantations of the Macaúbas Farm – Patrocínio, and today reach coffee plantations in Monte Carmelo, Iraí de Minas and Ibiá. The phenomenon has been attributed to organic fertilization and irrigation of the coffee plantations

  2. Gentrificación de La Candelaria: reconfiguraciones de lugar de residencia y consumo de grupos de altos ingresos

    Directory of Open Access Journals (Sweden)

    Adrian Smith Manrique Gómez

    2013-07-01

    Full Text Available El sector de La Candelaria (Bogotá D. C., Colombia ha vuelto a ser un lugar de consumo y residencia de grupos de personas de altos ingresos económicos, luego de su abandono a mediados del siglo XX por efecto de múltiples problemáticas urbanas. Esta dinámica de relocalización es conocida por la geografía urbana como gentrificación; tendencia previamente registrada en otras urbes e integrante del proceso global de construcción urbana. El artículo ofrece una lectura de dicha dinámica urbana bogotana a partir del análisis de sus causas, el seguimiento a su funcionamiento y sus consecuencias.

  3. Economic Valuation of Cultural Heritage: Application to a museum located in the Alto Douro Wine Region– World Heritage Site

    Directory of Open Access Journals (Sweden)

    Susana Fonseca

    2010-04-01

    Full Text Available Cultural assets are increasingly being considered in the policies of social and economic development of territories due to spillover effects. However, since cultural assets are not transacted in the market, their use value should be calculated using indirect methods of evaluation or non market techniques. In this paper, the travel cost method was chosen to estimate the curve of demand in the Museum of Lamego which constitutes an important cultural item of the Alto Douro Wine Region, classified by UNESCO in 2001, as a world heritage site – a living and evolving cultural landscape. The results of the application of the Poisson model confirm the expected, that is, the probability of visiting the museum is positively influenced by the educational level, female gender and negatively by the travel cost.

  4. Género, leña y sostenibilidad: el caso de una comunidad de los Altos de Chiapas

    Directory of Open Access Journals (Sweden)

    Denise Soares

    2006-01-01

    Full Text Available In this paper we analyse the strategies of use and management of firewood by the families in Pozuelos, a community of the municipality of Chamula, located in the Altos de Chiapas. We also explain the factors that promote or hinder the acceptance of alternative technologies that aim to reduce the consumption of firewood among rural families and thus decrease the female workload and increase the conservation of the woods. The analysis is focussed on the times and workloads of bio-fuel supply as well as on the complementarity of functions in the domestic nucleus for the collection of the resource and on the factors that interfere with technology appropriation, in this case wood-saving stoves. This work identifies the role of the women as administrators of the forestal resources for energy purposes and points out the factors that restrict the acceptance of technological changes as sociocultural, economical, climatic and technical.

  5. Radial velocity confirmation of Kepler-91 b. Additional evidence of its planetary nature using the Calar Alto/CAFE instrument

    CERN Document Server

    Lillo-Box, J; Henning, Th; Mancini, L; Ciceri, S; Figueira, P; Santos, N C; Aceituno, J; Sánchez, S

    2014-01-01

    The object transiting the star Kepler-91 was recently assessed as being of planetary nature. The confirmation was achieved by analysing the light-curve modulations observed in the Kepler data. However, quasi-simultaneous studies claimed a self-luminous nature for this object, thus rejecting it as a planet. In this work, we apply an {independent} approach to confirm the planetary mass of Kepler-91b by using multi-epoch high-resolution spectroscopy obtained with the Calar Alto Fiber-fed Echelle spectrograph (CAFE). We obtain the physical and orbital parameters with the radial velocity technique. In particular, we derive a value of $1.09 \\pm 0.20\\,M_{\\mathrm{Jup}}$ for the mass of Kepler-91b, in excellent agreement with our previous estimate that was based on the orbital brightness modulation.

  6. Radial velocity confirmation of Kepler-91 b. Additional evidence of its planetary nature using the Calar Alto/CAFE instrument

    Science.gov (United States)

    Lillo-Box, J.; Barrado, D.; Henning, Th.; Mancini, L.; Ciceri, S.; Figueira, P.; Santos, N. C.; Aceituno, J.; Sánchez, S. F.

    2014-08-01

    The object transiting the star Kepler-91 was recently assessed as being of planetary nature. The confirmation was achieved by analysing the light-curve modulations observed in the Kepler data. However, quasi-simultaneous studies claimed a self-luminous nature for this object, thus rejecting it as a planet. In this work, we apply anindependent approach to confirm the planetary mass of Kepler-91b by using multi-epoch high-resolution spectroscopy obtained with the Calar Alto Fiber-fed Echelle spectrograph (CAFE). We obtain the physical and orbital parameters with the radial velocity technique. In particular, we derive a value of 1.09 ± 0.20 MJup for the mass of Kepler-91b, in excellent agreement with our previous estimate that was based on the orbital brightness modulation.

  7. Eclipsing binaries and fast rotators in the Kepler sample. Characterization via radial velocity analysis from Calar Alto

    CERN Document Server

    Lillo-Box, J; Mancini, L; Henning, Th; Figueira, P; Ciceri, S; Santos, N

    2015-01-01

    The Kepler mission has provided high-accurate photometric data in a long time span for more than two hundred thousands stars, looking for planetary transits. Among the detected candidates, the planetary nature of around 15% has been established or validated by different techniques. But additional data is needed to characterize the rest of the candidates and reject other possible configurations. We started a follow-up program to validate, confirm, and characterize some of the planet candidates. In this paper we present the radial velocity analysis (RV) of those presenting large variations, compatible with being eclipsing binaries. We also study those showing large rotational velocities, which prevents us from obtaining the necessary precision to detect planetary-like objects. We present new RV results for 13 Kepler objects of interest (KOIs) obtained with the CAFE spectrograph at the Calar Alto Observatory, and analyze their high-spatial resolution images and the Kepler light curves of some interesting cases. ...

  8. IMPACTOS DA ATIVIDADE TURÍSTICA À ECONOMIA MUNICIPAL DE ALTO PARAÍSO DE GOIÁS, BRASIL

    Directory of Open Access Journals (Sweden)

    Tathiana Rodrigues Salgado

    2014-01-01

    Full Text Available El turismo en Alto Paraíso de Goiás tiene un papel importante en la economía de la ciudad, ya sea moviendo las tiendas locales o mediante la generación de puestos de trabajo directos y de temporada. Sin embargo, una vertiente poco explorada por los administradores municipales son los ingresos fiscales relacionados con este segmento económico, como se ve en la investigación. El flujo de turistas, contribuye poco a la formación de las finanzas municipales, principalmente debido a la falta de una legislación específica para mejorar el uso de las actividades turísticas.

  9. Combinar trabajo y estudios superiores ¿Un privilegio de jóvenes de sectores de altos ingresos?

    Directory of Open Access Journals (Sweden)

    Mariana Busso

    2015-07-01

    Full Text Available El presente artículo ahonda en la comprensión de una relación muy discutida desde las ciencias sociales: educación y trabajo. En particular partiremos de un dato interesante de la realidad argentina que contrasta con los antecedentes académicos sobre el tema: los jóvenes de sectores medios y altos que acceden a estudios superiores, son más proclives a articular trabajo y estudio que aquellos de sectores bajos. El estudio procesa, analiza y complementa datos longitudinales provenientes de estrategias de investigación cuantitativas y cualitativas a fin de dar cuenta de distintos factores que confluyen en esa realidad: desde datos estructurales y sociodemográficos, a percepciones y motivaciones subjetivas de los jóvenes en relación al trabajo y el estudio.  

  10. Patrimonio Gastronómico e Turismo Como Estrategia de Desarrollo Local en El Alto Lerma, Toluca - México

    Directory of Open Access Journals (Sweden)

    Alejandro Tonatiuh Romero Contreras

    2012-11-01

    Full Text Available Este artigo tem como objetivos descrever e caracterizar a formação da cozinha tradicional da região de Alto Lerma, a fim de reconhecer o patrimônio culinário existente, iniciando pela parte mais básica da gastronomia desta região, no Valle de Toluca, México. Assim como o potencial para o desenvolvimento local das comunidades detentoras de tal saber. A fim de alcançar tais objetivos, utilizou-se a informação geográfica, arqueológica e etnográfica de projetos publicados, bem como teses profissionais e pesquisas de campo, identificando aquelas características ou sabores que conferem o caráter regional através do tempo.

  11. Agroindustria y extractivismo en el Alto Cauca. Impactos sobre los sistemas de subsistencia Afrocampesinos y resistencias (1950-2011

    Directory of Open Access Journals (Sweden)

    Irene Vélez Torres

    2013-12-01

    Full Text Available La agroindustria y el extractivismo han generado un profundo cambio en las prácticaseconómicas tradicionales del Alto Cauca en Colombia en detrimento de los sistemas socio-económicos de subsistencia de la población local Afro-campesina. El intenso conflictoarmado y la migración forzada han acompañado la instauración de estos modelos de acumulaciónpor despojo. Utilizando una metodología de investigación participativa, este artículoanaliza críticamente la disputa por el acceso y la propiedad sobre la tierra y los bienesambientales del territorio, rescatando el punto de vista de comunidades Afrodescendientesy organizaciones sociales que han resistido desde la colonia y hasta nuestros días para defendersus pueblos y territorios.

  12. Alto Douro Vinhateiro património da humanidade: a complexidade de um programa de preservação

    Directory of Open Access Journals (Sweden)

    Lina Lourenço-Gomes

    2012-01-01

    Full Text Available The Alto Douro Wine Region (ADW was listed by UNESCO in 2001 as a living and evolving cultural landscape. Besides the physical diversity of the landscape, there is a multiplicity of actors involved in ADW preservation defined at three levels: i instruments and public entities (interms of land management; ii property rights definition and liability management (asset level; and iii stakeholders (as regard the preservation effects. In this paper, we define the relevant attributes to formulate a program to preserve and safeguard the ADW, based on the evidence suggested in a previous study, on the results of a pretest and using information from public discussions and meetings with experts. The research carried out shows that the attributes to consider are: (a terraced vineyards supported by schist walls, (b landscape mosaic with agricultural diversity, including plots planted with and bordered by traditional crops, (c traditional agglomerations and built heritage and, (d a price, expressed by an annual tax increase per household..

  13. Coma imaging of comet P/Brorsen-Metcalf at Calar Alto in late July to mid August 1989

    Science.gov (United States)

    Boehnhardt, Hermann; Vanysek, Vladimir; Birkle, K.; Hopp, U.

    1992-01-01

    Comet P/Brorsen-Metcalf was observed on 1989/07/28+30 and on 1989/08/04+12(+14) with the 3.5 m telescope and the 0.8 m Schmidt camera at Calar Alto/Spain. The images exhibit a narrow plasma tail pointing into anti-solar direction. On 1989/07/30 a triple tail was found which can be interpreted as tail ray event. The coma isophotes show prominent asymmetries with the nucleus located on the tailward side of the isophote foci and with a slightly higher brightness in the Northern Hemisphere of the coma. A strong curved jet feature was detected in the coma on 1989/07/30. The jet extended at least 30,000 km into the sunward coma hemisphere. The rotation period of about 1.3 days, estimated from the curvature of the coma jet, needs verification by other observations.

  14. Gentrificación de La Candelaria: reconfiguraciones de lugar de residencia y consumo de grupos de altos ingresos

    OpenAIRE

    Adrian Smith Manrique Gómez

    2013-01-01

    El sector de La Candelaria (Bogotá D. C., Colombia) ha vuelto a ser un lugar de consumo y residencia de grupos de personas de altos ingresos económicos, luego de su abandono a mediados del siglo XX por efecto de múltiples problemáticas urbanas. Esta dinámica de relocalización es conocida por la geografía urbana como gentrificación; tendencia previamente registrada en otras urbes e integrante del proceso global de construcción urbana. El artículo ofrece una lectura de dicha dinámica urbana bog...

  15. Estudio florístico y aportaciones a la conservación del alto Cabriel (Cuenca)

    OpenAIRE

    Mayoral García-Berlanga, Olga

    2011-01-01

    El alto Cabriel es un área montañosa inmersa en plena Serranía de Cuenca (Sistema Ibérico meridional), con altitudes entre los 910 y los 1.840 m. La zona de estudio com-prende 93.311 hectáreas -repartidas en 20 cuadrículas UTM de 10 km de lado- y 16 muni-cipios. Casi la mitad de la longitud del río Cabriel, afluente izquierdo del Júcar, discurre por la zona de estudio. Dominan las litologías calcáreas, destacando dos afloramientos de areniscas del Bundsandstein. Desde un punto de vista bio...

  16. Adición de dl-metionina en dietas con sorgo alto en taninos para pollos de engorda

    OpenAIRE

    Emilio Reyes Sánchez; Arturo Cortéz Cuevas; Eduardo Morales Barrera; Ernesto Ávila González

    2000-01-01

    Se estudió una mayor inclusión de DL-metionina en dietas para pollos de engorda con sorgo alto en taninos. Experimento 1: 60 pollitos mixtos de 0 a 21 días se colocaron en 2 tratamientos, con 3 repeticiones de 10 aves; las dietas contenían 3000 kcal de EM/kg, 22% de proteína (PC) y 0.93% de metionina+cistina (M+C). Experimento 2: 180 pollitos mixtos de 0 a 49 días se asignaron a 3 tratamientos con 3 réplicas de 20 pollos. Para ambos experimentos en el tratamiento (T)1, la dieta fue con sorgo ...

  17. Modelación dinámica de lactato en isquemia para atletas de alto rendimiento

    OpenAIRE

    M. A. Leminszka; G. Dieck-Assad; S. O. Martínez; J. E. Garza

    2010-01-01

    El presente trabajo propone un modelo dinámico para la medición de ácido láctico para atletas de alto rendimiento en isquemia, es decir cuando hay reducción de flujo sanguíneo (fuente de oxígeno). Se presenta una introducción al proceso de regulación de lactato en isquemia para describir los parámetros involucrados en la modelación dinámica. Los resultados indican que el modelo dinámico predice en forma efectiva la cantidad de lactato en las pruebas físicas aplicadas a tres atletas. Al compar...

  18. Lixiviación de concentrados de cobre con alto contenido de arsénico en medio cloro-cloruro

    Directory of Open Access Journals (Sweden)

    Herreros, O.

    2003-04-01

    Full Text Available This work reports the results of copper concentrates leaching, which have high arsenic contents (up to 2.5 %. The treatments were carried out using chlorine that forms from sodium hypochlorite and sulphuric acid. The aim of this work is to obtain a solution having high copper content 4 to 6 g/1 and 5 to 7 g/1 free acid in order to submit it directly to a solvent extraction stage. In addition, this solution should have minimum content of arsenic and chloride ions. To carry out this investigation, an acrylic reactor was constructed where the leaching tests were made at constant temperature in a thermostatic bath under atmospheric pressure. The concentrate samples were obtained from mineral processing plants from Antofagasta, Chile. Typical variables were studied, such as leaching agent concentration, leaching time, pulp density and temperature among others. Some of the residues were analyzed by XRD and EPS. On the other hand, the solutions were analyzed by Atomic Absorption Spectroscopy. The results indicate solutions having the contents stated above can be obtained.

    Se ha estudiado la lixiviación de concentrados de cobre con alto contenido de arsénico (hasta 2,5 %, mediante un proceso de oxidación con cloro formado "in situ", por la reacción entre hipoclorito de sodio y ácido sulfúrico. El objetivo de estas experiencias es producir una solución de lixiviación, de características adecuadas para entrar a la etapa posterior de extracción por solventes (SX, es decir, entre 4 a 6 g/1 de cobre y 5 a 7 g/1 de ácido residual. Esta disolución, además, deberá contener cantidades mínimas de arsénico y cloruro. Las lixiviaciones se realizaron por agitación en un reactor de acrílico diseñado para tal efecto, a temperatura ambiente y a presión atmosférica. Se utilizaron concentrados de cobre de explotaciones mineras de Antofagasta (Chile. Se estudiaron algunas variables típicas de la lixiviación, como son: la concentración de

  19. DIAGNÓSTICO DE LA CAPACIDAD REPRODUCTIVA DE TOROS EN GANADERÍAS DE TRES MUNICIPIOS DEL ALTO MAGDALENA

    Directory of Open Access Journals (Sweden)

    Vejarano OA

    2005-12-01

    Full Text Available El objetivo del estudio fue evaluar la funcionalidad reproductiva de toros del alto magdalena analizandoel efecto de la edad y la raza sobre la calidad del semen y otras características reproductivas. La investigaciónse realizó en los municipios de Paicol, La Plata y Nátaga (Huila - Colombia, cubriendo zonas de bosqueseco tropical (bs-T y bosque húmedo premontano (bh-PM. 60 toros de diferentes razas y edades fueronevaluados bajo condiciones de monta natural y sin reposo sexual previo al examen, usando la metodologíarecomendada por la American Society of Therigenology (AST. Para evaluar el efecto del tipo racial sobrealgunas características reproductivas se utilizó un diseño completamente al azar con tres tratamientos ydiferentes número de repeticiones por tratamiento: T1: Bos indicus , T2: Bos indicus x Bos taurus y T3: Bostaurus . El efecto de la edad fue determinado estableciendo un diseño con siete tratamientos y diferentenúmero de repeticiones por tratamientoí: T1: 54 meses de edad. Se aplicó la prueba Diferencia Mínima Significativa para determinarlas diferencias estadísticas y se estableció un modelo de predicción para movilidad masal. Elcomportamiento reproductivo expresado en calidad del material seminal, libido y demás característicasreproductivas en los toros del alto magdalena, estuvo dentro de los valores normales. El tipo racial notuvo un efecto significativo sobre las características reproductivas. Con excepción de la circunferenciaescrotal y el volumen del eyaculado, la edad tampoco ejerció un efecto sobre las variables analizadas. Elmodelo de predicción para la movilidad masal (Y, a partir de un valor dado de circunferencia escrotal (Xes: Y = (1.90275 (X.

  20. Isotope hydrology to optimize the management of water resources in northern Peru: The Alto Piura aquifer - Peru

    International Nuclear Information System (INIS)

    During the period January 2001-December 2004, a study of the more productive areas of the Alto Piura aquifer, NW Peru, was carried out as part of the IAEA's regional project RLA8/0/31. The final objective of the project was to establish a numerical model of the aquifer that can be used for a sustainable management of water resources. The study was conducted by the University of Piura. Based on regional geology and hydrogeological information, isotope and hydrochemical techniques were applied to obtain a preliminary conceptual model of the aquifer, and set the premises to achieve the objectives of the study. The studies showed that the Alto Piura aquifer is an heterogeneous system, consisting of alluvial and fluvial sediments, constituting a semi-confined aquifer. A significant lateral recharge from the heavily weathered and fractured igneous metamorphic massifs was identified at the NE sector of the study area. The alluvial fans in the NE region represent a transition area from the tributaries of the Piura river to the local aquifers. The hydraulic connection between surface and groundwater is not evident in the SW area. In this area, groundwater is of the type sodiumchloride and sodium-sulphate, with electrical conductivity values higher than 1000 μS·cm-1. In the NE area, waters are of the type calcium to sodium bicarbonate, with electrical conductivity values lower than 1000 μS·cm-, derived from weathered rocks in the neighbouring massifs. A large isotope variability was observed in samples from precipitation, rivers and aquifers, and could not easily be explained as consequence of the altitude effect. As alternative, the analysis of the isotope contents of springs is proposed. (author)

  1. Research reactors in Argentina

    International Nuclear Information System (INIS)

    Argentine Nuclear Development started in early fifties. In 1957, it was decided to built the first a research reactor. RA-1 reactor (120 kw, today licensed to work at 40 kW) started operation in January 1958. Originally RA-1 was an Argonaut (American design) reactor. In early sixties, the RA-1 core was changed. Fuel rods (20% enrichment) was introduced instead the old Argonaut core design. For that reason, a critical facility named RA-0 was built. After that, the RA-3 project started, to build a multipurpose 5 MW nuclear reactor MTR pool type, to produce radioisotopes and research. For that reason and to define the characteristics of the RA-3 core, another critical facility was built, RA-2. Initially RA-3 was a 90 % enriched fuel reactor, and started operation in 1967. When Atucha I NPP project started, a German design Power Reactor, a small homogeneous reactor was donated by the German Government to Argentina (1969). This was RA-4 reactor (20% enrichment, 1W). In 1982, RA-6 pool reactor achieved criticality. This is a 500 kW reactor with 90% enriched MTR fuel elements. In 1990, RA-3 started to operate fueled by 20% enriched fuel. In 1997, the RA-8 (multipurpose critical facility located at Pilcaniyeu) started to operate. RA-3 reactor is the most important CNEA reactor for Argentine Research Reactors development. It is the first in a succession of Argentine MTR reactors built by CNEA (and INVAP SE ) in Argentina and other countries: RA-6 (500 kW, Bariloche-Argentina), RP-10 (10MW, Peru), NUR (500 kW, Algeria), MPR (22 MW, Egypt). The experience of Argentinian industry permits to compete with foreign developed countries as supplier of research reactors. Today, CNEA has six research reactors whose activities have a range from education and promotion of nuclear activity, to radioisotope production. For more than forty years, Argentine Research Reactors are working. The experience of Argentine is important, and argentine firms are able to compete in the design and

  2. Thai research reactor

    International Nuclear Information System (INIS)

    The Office of Atomic Energy for Peace (OAEP) was established in 1962, as a reactor center, by the virtue of the Atomic Energy for Peace Act, under operational policy and authority of the Thai Atomic Energy for Peace Commission (TAEPC); and under administration of Ministry of Science, Technology and Energy. It owns and operates the only Thai Research Reactor (TRR-1/M1). The TRR-1/M1 is a mixed reactor system constituting of the old MTR type swimming pool, irradiation facilities and cooling system; and TRIGA Mark III core and control instrumentation. The general performance of TRR-1/M1 is summarized in Table I. The safe operation of TRR-1/M1 is regulated by Reactor Safety Committee (RSC), established under TAEPC, and Health Physics Group of OAEP. The RCS has responsibility and duty to review of and make recommendations on Reactor Standing Orders, Reactor Operation Procedures, Reactor Core Loading and Requests for Reactor Experiments. In addition,there also exist of Emergency Procedures which is administered by OAEP. The Reactor Operation Procedures constitute of reactor operating procedures, system operating procedures and reactor maintenance procedures. At the level of reactor routine operating procedures, there is a set of Specifications on Safety and Operation Limits and Code of Practice from which reactor shift supervisor and operators must follow in order to assure the safe operation of TRR-1/M1. Table II is the summary of such specifications. The OAEP is now upgrading certain major components of the TRR-1/M1 such as the cooling system, the ventilation system and monitoring equipment to ensure their adequately safe and reliable performance under normal and emergency conditions. Furthermore, the International Atomic Energy Agency has been providing assistance in areas of operation and maintenance and safety analysis. (author)

  3. Nuclear Reactor Physics

    Science.gov (United States)

    Stacey, Weston M.

    2001-02-01

    An authoritative textbook and up-to-date professional's guide to basic and advanced principles and practices Nuclear reactors now account for a significant portion of the electrical power generated worldwide. At the same time, the past few decades have seen an ever-increasing number of industrial, medical, military, and research applications for nuclear reactors. Nuclear reactor physics is the core discipline of nuclear engineering, and as the first comprehensive textbook and reference on basic and advanced nuclear reactor physics to appear in a quarter century, this book fills a large gap in the professional literature. Nuclear Reactor Physics is a textbook for students new to the subject, for others who need a basic understanding of how nuclear reactors work, as well as for those who are, or wish to become, specialists in nuclear reactor physics and reactor physics computations. It is also a valuable resource for engineers responsible for the operation of nuclear reactors. Dr. Weston Stacey begins with clear presentations of the basic physical principles, nuclear data, and computational methodology needed to understand both the static and dynamic behaviors of nuclear reactors. This is followed by in-depth discussions of advanced concepts, including extensive treatment of neutron transport computational methods. As an aid to comprehension and quick mastery of computational skills, he provides numerous examples illustrating step-by-step procedures for performing the calculations described and chapter-end problems. Nuclear Reactor Physics is a useful textbook and working reference. It is an excellent self-teaching guide for research scientists, engineers, and technicians involved in industrial, research, and military applications of nuclear reactors, as well as government regulators who wish to increase their understanding of nuclear reactors.

  4. Prevalencia de genotipos del virus del papiloma humano de alto riesgo no vacunables dentro del programa de Detección Precoz de Cáncer de Cérvix en Cantabria

    Directory of Open Access Journals (Sweden)

    María Paz-Zulueta

    2016-06-01

    Conclusiones: Atendiendo al alto porcentaje de VPH de alto riesgo oncogénico no vacunable, habría que replantear la estrategia de prevención en la población, que podría tener una falsa sensación de protección.

  5. Reactor containment and reactor safety in the United States

    International Nuclear Information System (INIS)

    The reactor safety systems of two reactors are studied aiming at the reactor containment integrity. The first is a BWR type reactor and is called Peachbottom 2, and the second is a PWR type reactor, and is called surry. (E.G.)

  6. De Alto, Bruno Pedro, Autonomía tecnológica: La audacia de la División Electrónica de FATE

    OpenAIRE

    José A. Borello

    2014-01-01

    De Alto, Bruno Pedro, Autonomía tecnológica: La audacia de la División Electrónica de FATE, Buenos Aires, Ediciones CICCUS, Exi2 y UTN-Facultad Regional General Pacheco, 2013 (272 págs.), ISBN 978-987-693-019-2.

  7. De Alto, Bruno Pedro, Autonomía tecnológica: La audacia de la División Electrónica de FATE

    Directory of Open Access Journals (Sweden)

    José A. Borello

    2014-07-01

    Full Text Available De Alto, Bruno Pedro, Autonomía tecnológica: La audacia de la División Electrónica de FATE, Buenos Aires, Ediciones CICCUS, Exi2 y UTN-Facultad Regional General Pacheco, 2013 (272 págs., ISBN 978-987-693-019-2.

  8. BENITO, NUEVO MUTANTE DE FLOR DE JAMAICA (Hibiscus sabdariffa, L. DE ALTO POTENCIAL PRODUCTIVO EN CONDICIONES DE BAJOS SUMINISTROS DE AGUA

    Directory of Open Access Journals (Sweden)

    María C. González Cepero

    2015-01-01

    Full Text Available En el Instituto Nacional de Ciencias Agrícolasse desarrolló un programa de mejoramiento genético dirigidoa obtener variedades de Flor de Jamaica de alto potencialproductivo, en condiciones de bajos suministros de agua.

  9. A Review. The Use of the Alto, Bass and Contrabass Clarinets in Selected Wind Band Compositions Written Between 1951 and 1972.

    Science.gov (United States)

    Heim, Norman M.

    1987-01-01

    Reviews a dissertation which examined the scoring practices for alto, bass, and contrabass clarinets in selected compositions written between 1951-1972. The study identified new practices for scoring low clarinets in wind band compositions. The study is recommended to readers seeking a good understanding of the use of clarinets in these…

  10. TRIGA reactor main systems

    International Nuclear Information System (INIS)

    This module describes the main systems of low power (<2 MW) and higher power (≥2 MW) TRIGA reactors. The most significant difference between the two is that forced reactor cooling and an emergency core cooling system are generally required for the higher power TRIGA reactors. However, those TRIGA reactors that are designed to be operated above 3 MW also use a TRIGA fuel that is specifically designed for those higher power outputs (3 to 14 MW). Typical values are given for the respective systems although each TRIGA facility will have unique characteristics that may only be determined by the experienced facility operators. Due to the inherent wide scope of these research reactor facilities construction and missions, this training module covers those systems found at most operating TRIGA reactor facilities but may also discuss non-standard equipment that was found to be operationally useful although not necessarily required. (author)

  11. Evaluation of research reactors

    International Nuclear Information System (INIS)

    The present status of research reactors with highly enriched (93%) uranium fuel at JAERI, JRR-2 and JMTR is described. JRR-2 is a heterogeneous type of reactor, using heavy water as moderator and coolant. It uses both MTR type and cylindrical type of fuel elements. The maximum thermal power and the thermal neutron flux are 10 MW and 2x1014 n/cm2 see respectively. The reactor has been used for various experiments such as solid state physics, material irradiation, reactor fuel irradiation and radioisotope production. The JMTR is a multi-purpose tank type material testing reactor, and light water moderator and coolant, operated at 50 MW. The evaluation of lower enriched fuel and its consequences for both reactors is considered more especially

  12. Multipurpose research reactors

    International Nuclear Information System (INIS)

    The international symposium on the utilization of multipurpose research reactors and related international co-operation was organized by the IAEA to provide for information exchange on current uses of research reactors and international co-operative projects. The symposium was attended by about 140 participants from 36 countries and two international organizations. There were 49 oral presentations of papers and 24 poster presentations. The presentations were divided into 7 sessions devoted to the following topics: neutron beam research and applications of neutron scattering (6 papers and 1 poster), reactor engineering (6 papers and 5 posters), irradiation testing of fuel and material for fission and fusion reactors (6 papers and 10 posters), research reactor utilization programmes (13 papers and 4 posters), neutron capture therapy (4 papers), neutron activation analysis (3 papers and 4 posters), application of small reactors in research and training (11 papers). A separate abstract was prepared for each of these papers. Refs, figs and tabs

  13. The nuclear soliton reactor

    International Nuclear Information System (INIS)

    The basic reactor physics of a completely novel nuclear fission reactor design - the soliton-reactor - is presented on the basis of a simple model. In such a reactor, the neutrons in the critical region convert either fertile material in the adjacent layers into fissile material or reduce the poisoning of fissile material in such a manner that successively new critical regions emerge. The result is an autocatalytically driven burn-up wave which propagates throughout the reactor. Thereby, the relevant characteristic spatial distributions (neutron flux, specific power density and the associated particle densities) are solitons - wave phenomena resulting from non-linear partial differential equations which do not change their shape during propagation. A qualitativley new kind of harnessing nuclear fission energy may become possible with fuel residence times comparable with the useful lifetime of the reactor system. In the long run, fast breeder systems which exploit the natural uranium and thorium resources, without any reprocessing capacity are imaginable. (orig.)

  14. Fast Spectrum Reactors

    CERN Document Server

    Todd, Donald; Tsvetkov, Pavel

    2012-01-01

    Fast Spectrum Reactors presents a detailed overview of world-wide technology contributing to the development of fast spectrum reactors. With a unique focus on the capabilities of fast spectrum reactors to address nuclear waste transmutation issues, in addition to the well-known capabilities of breeding new fuel, this volume describes how fast spectrum reactors contribute to the wide application of nuclear power systems to serve the global nuclear renaissance while minimizing nuclear proliferation concerns. Readers will find an introduction to the sustainable development of nuclear energy and the role of fast reactors, in addition to an economic analysis of nuclear reactors. A section devoted to neutronics offers the current trends in nuclear design, such as performance parameters and the optimization of advanced power systems. The latest findings on fuel management, partitioning and transmutation include the physics, efficiency and strategies of transmutation, homogeneous and heterogeneous recycling, in addit...

  15. Fusion reactor research

    International Nuclear Information System (INIS)

    This work covers four separate areas: (1) development of technology for processing liquid lithium from blankets, (2) investigation of hydrogen isotope permeation in candidate structural metals and alloys for near-term fusion reactors, (3) analytical studies encompassing fusion reactor thermal hydraulics, tritium facility design, and fusion reactor safety, and (4) studies involving dosimetry and damage analysis. Recent accomplishments in each of these areas are summarized

  16. The Integral Fast Reactor

    International Nuclear Information System (INIS)

    The Integral Fast Reactor (IFR) is an innovative liquid metal reactor concept being developed at Argonne National Laboratory. It seeks to specifically exploit the inherent properties of liquid metal cooling and metallic fuel in a way that leads to substantial improvements in the characteristics of the complete reactor system. This paper describes the key features and potential advantages of the IFR concept, with emphasis on its safety characteristics. 3 refs., 4 figs., 1 tab

  17. The replacement research reactor

    International Nuclear Information System (INIS)

    As a consequences of the government decision in September 1997. ANSTO established a replacement research reactor project to manage the procurement of the replacement reactor through the necessary approval, tendering and contract management stages This paper provides an update of the status of the project including the completion of the Environmental Impact Statement. Prequalification and Public Works Committee processes. The aims of the project, management organisation, reactor type and expected capabilities are also described

  18. PFBR reactor protection

    International Nuclear Information System (INIS)

    Design philosophy adopted for Prototype Fast breeder Reactor (PFBR) is a classical one and has the following features: triplicated sensors for measuring important safety parameters; two independent reactor protection Logic Systems based on solid state devices; reactivity control achieved by control rods; gas equipped modules at the core blanket interface providing negative reactivity. Design verification of these features showed that safety of the reactor can be achieved by a traditional approach since the inherent features of LMFBR make this easy

  19. Reactor BR2

    International Nuclear Information System (INIS)

    The BR2 reactor is still SCK-CEN's most important nuclear facility. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. Various aspects concerning the operation of the BR2 Reactor, the utilisation of the CALLISTO loop and the irradiation programme, the BR2 R and D programme and the production of isotopes and of NTD-silicon are discussed. Progress and achievements in 1999 are reported

  20. TRIGA reactor characteristics

    International Nuclear Information System (INIS)

    This module describes the general design, characteristics and parameters of TRIGA reactors and fuels. It is recommended that most of this information should be incorporated into any reactor operator training program and, in many cases, the facility Safety Analysis Report. It is oriented to teach the basics of the physics and mechanical design of the TRIGA fuel as well as its unique operational characteristics and the differences between TRIGA fuels and others more traditional reactor fuels. (nevyjel)

  1. Reactor Safety Analysis

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on reactor safety is to develop expertise in probabilistic and deterministic reactor safety analysis. The research programme consists of four main activities, in particular the development of software for reliability analysis of large systems and participation in the international PHEBUS-FP programme for severe accidents, the development of an expert system for the aid to diagnosis; the development and application of a probabilistic reactor dynamics method. Main achievements in 1999 are reported

  2. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

    Research and development activities in the Department of Reactor Engineering in fiscal 1984 are described. The work of the Department is closely related to development of multipurpose Very High Temperature Gas Cooled Reactor and Fusion Reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, reactor physics experiment and analysis, fusion neutronics, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, safeguards technology, and activities of the Committee on Reactor Physics. (author)

  3. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research and development activities in the Division of Reactor Engineering in fiscal 1981 are described. The work of the Division is closely related to development of multipurpose Very High Temperature Gas Cooled Reactor and fusion reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, and fusion reactor technology, and activities of the Committee on Reactor Physics. (author)

  4. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities in the Division of Reactor Engineering in fiscal 1979 are described. The work of the Division is closely related to development of multi-purpose Very High Temperature Gas Cooled Reactor and fusion reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, and fusion reactor technology, and activities of the Committees on Reactor Physics and on Decomissioning of Nuclear Facilities. (author)

  5. New reactor concepts

    International Nuclear Information System (INIS)

    The document gives a summary of new nuclear reactor concepts from a technological point of view. Belgium supports the development of the European Pressurized-Water Reactor, which is an evolutionary concept based on the European experience in Pressurized-Water Reactors. A reorientation of the Belgian choice for this evolutionary concept may be required in case that a decision is taken to burn plutonium, when the need for flexible nuclear power plants arises or when new reactor concepts can demonstrate proved benefits in terms of safety and cost

  6. Reactor construction steels

    International Nuclear Information System (INIS)

    The basic functions of light water reactor components are shown on the example of a pressurized water reactor and the requirements resulting therefrom for steel, the basic structural material, are derived. A detailed analysis of three main groups of reactor steels is presented and the applications are indicated of low-alloyed steels, high-alloyed austenitic steels, and steels with a high content of Ni and of alloying additions for steam generator pipes. An outline is given of prospective fast breeder reactor steels. (J.K.)

  7. Commercialization of fast reactors

    International Nuclear Information System (INIS)

    Comparative analysis has been performed of capital and fuel cycle costs for fast BN-type and pressurized light water VVER-type reactors. As a result of materials demand and components costs comparison of NPPs with VVER-1000 and BN-600 reactors, respectively, conclusion was made, that under equal conditions of the comparison, NPP with fast reactor had surpassed the specific capital cost of NPP with VVER by about 30 - 40 %. Ways were determined for further decrease of this difference, as well as for the fuel cycle cost reduction, because at present it is higher than that of VVER-type reactors. (author)

  8. Mirror fusion reactors

    International Nuclear Information System (INIS)

    Conceptual design studies were made of fusion reactors based on the three current mirror-confinement concepts: the standard mirror, the tandem mirror, and the field-reversed mirror. Recent studies of the standard mirror have emphasized its potential as a fusion-fission hybrid reactor, designed to produce fuel for fission reactors. We have designed a large commercial hybrid and a small pilot-plant hybrid based on standard mirror confinement. Tandem mirror designs include a commercial 1000-MWe fusion power plant and a nearer term tandem mirror hybrid. Field-reversed mirror designs include a multicell commercial reactor producing 75 MWe and a single-cell pilot plant

  9. Natural convection type reactor

    International Nuclear Information System (INIS)

    In a natural convection type nuclear reactor, a reactor core is disposed such that the top of the reactor core is always situated in a flooded position even if pipelines connected to the pressure vessel are ruptured and the level at the inside of the reactor vessel is reduced due to flashing. Further, a lower dry well situated below the pressure vessel is disposed such that it is in communication with a through hole to a pressure suppression chamber situated therearound and the reactor core is situated at the level lower than that of the through hole. If pipelines connected to the pressure vessel are ruptured to cause loss of water, although the water level is lowered after the end of the flashing, the reactor core is always flooded till the operation of a pressure accummulation water injection system to prevent the top of the reactor core even from temporary exposure. Further, injected water is discharged to the outside of the pressure vessel, transferred to the lower dry well, and flows through the through hole to the pressure control chamber and cools the surface of the reactor pressure vessel from the outside. Accordingly, the reactor core is cooled to surely and efficiently remove the after-heat. (N.H.)

  10. INVAP's Research Reactor Designs

    International Nuclear Information System (INIS)

    INVAP, an Argentine company founded more than three decades ago, is today recognized as one of the leaders within the research reactor industry. INVAP has participated in several projects covering a wide range of facilities, designed in accordance with the requirements of our different clients. For complying with these requirements, INVAP developed special skills and capabilities to deal with different fuel assemblies, different core cooling systems, and different reactor layouts. This paper summarizes the general features and utilization of several INVAP research reactor designs, from subcritical and critical assemblies to high-power reactors IAEA safety

  11. Reactor power control device

    International Nuclear Information System (INIS)

    The present invention provides a control device which can conduct scram and avoid lowering of the power of a nuclear power plant upon occurrence of earthquakes. Namely, the device of the present invention comprises, in addition to an existent power control device, (1) an earthquake detector for detecting occurrence and annihilation of earthquakes and (2) a reactor control device for outputting control rod operation signals and reactor core flow rate control signals depending on the earthquake detection signals from the detector, and reactor and plant information. With such a constitution, although the reactor is vibrated by earthquakes, the detector detects slight oscillations of the reactor by initial fine vibration waves as premonitory symptoms of serious earthquakes. The earthquake occurrence signals are outputted to the reactor control device. The reactor control device, receiving the signals, changes the position of control rods by way of control rod driving mechanisms to make the axial power distribution in the reactor core to a top peak type. As a result, even if the void amount in the reactor core is reduced by the subsequent actual earthquakes, since the void amount is moved, effects on the increase of neutron fluxes by the actual earthquakes is small. (I.S.)

  12. Nuclear reactor internals arrangement

    International Nuclear Information System (INIS)

    A nuclear reactor internals arrangement is disclosed which facilitates reactor refueling. A reactor vessel and a nuclear core is utilized in conjunction with an upper core support arrangement having means for storing withdrawn control rods therein. The upper core support is mounted to the underside of the reactor vessel closure head so that upon withdrawal of the control rods into the upper core support, the closure head, the upper core support and the control rods are removed as a single unit thereby directly exposing the core for purposes of refueling

  13. Fusion Reactor Materials

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on fusion reactor materials is to contribute to the knowledge on the radiation-induced behaviour of fusion reactor materials and components as well as to help the international community in building the scientific and technical basis needed for the construction of the future reactor. Ongoing projects include: the study of the mechanical and chemical (corrosion) behaviour of structural materials under neutron irradiation and water coolant environment; the investigation of the characteristics of irradiated first wall material such as beryllium; investigations on the management of materials resulting from the dismantling of fusion reactors including waste disposal. Progress and achievements in these areas in 2001 are discussed

  14. Tobacco planters and collectors in the Alto Paraná colonization of Misiones (1930-1946 Tabacaleros y acopiadores en la colonización del Alto Paraná Misionero (1930-1946

    Directory of Open Access Journals (Sweden)

    María Cecilia Gallero

    2011-01-01

    Full Text Available During the settler expansion between the decades 1920-1930 in the Alto Paraná of Misiones, the tobacco was for German-Brazilian settlers a product to obtain monetary incomes and for their own consum. The aim of this paper is to analyze the link between producers and collectors of tobacco, trying to identify the conflicting elements of this relationship (disputes over the classification and the product price. The heuristic work focused on Johann Company, the company's largest collectors of Puerto Rico Colony and the only one that keeps the records since its beginings (1929. The product their collected the most time was tobacco (1929-1985, and in descending order of importance their also collected tung, cassava starch and lard. Throughout the book collection of tobacco sales it is showed both sides of the production of tobacco: tobacco producers and collectors. This information has been enriched by interviews with key informants.Durante la expansión colonizadora de las décadas de 1920-1930 en el Alto Paraná Misionero, el tabaco fue para los colonos alemanes-brasileños un cultivo destinado a la obtención de ingresos monetarios y bienes de consumo. El objetivo de este trabajo es analizar el vínculo entre productores y acopiadores de tabaco, tratando de identificar los elementos conflictivos de esta relación (disputas por la clasificación y el precio del producto. El trabajo heurístico se focalizó en la Compañía Johann, la empresa acopiadora más grande de la colonia Puerto Rico y la única que mantiene los registros desde su creación (1929. El producto que acopió por más tiempo fue el tabaco (1929-1985, y en orden de importancia decreciente también acopiaron tung, almidón de mandioca y grasa de cerdo. A través de los libros de acopio y de venta de tabaco enfardelado se da vida a las dos caras de la producción del tabaco: los productores tabacaleros y los acopiadores. Dicha información ha sido enriquecida con entrevistas a

  15. Evaluación de la exposición a selenio en Los Altos de Jalisco, México Evaluation of the exposure to selenium in Los Altos de Jalisco, México

    Directory of Open Access Journals (Sweden)

    Roberto Hurtado-Jiménez

    2007-08-01

    Full Text Available OBJETIVO: Evaluar la exposición a selenio (Se vía agua potable en los habitantes de Los Altos de Jalisco. MATERIAL Y MÉTODOS: Se determinó la concentración de Se en 125 pozos y se estimaron los niveles de exposición a Se en bebés, niños y adultos. RESULTADOS: La dosis de exposición y la ingestión de Se vía agua potable variaron en los siguientes rangos: a bebés: 1.3-6.7 µg/kg/d y 12.6-67.2 µg/d; b niños: 0.8-4.5 µg/kg/d y 16.8-89.6 µg/d; c adultos: 0.6-3.0 µg/kg/d y 33.6-179.2 µg/d. CONCLUSIONES: En este caso, la exposición a Se representa un riesgo potencial para la salud de la población, ya que en la mayoría de los casos es mayor que la recomendada por organismos internacionales de salud. Sin embargo, no es tan alta como para esperar la ocurrencia de selenosis.OBJECTIVE: To evaluate the exposure to selenium in drinking water in Los Altos de Jalisco (Jalisco State Heights. MATERIALS AND METHODS: The concentration of selenium was determined in 125 water wells, and the exposure doses to selenium were estimated for babies, children and adults. RESULTS: The estimated values of the exposure doses to selenium and total intake of selenium were in the following ranges, respectively: (a babies: 1.3-6.7 µg/kg/d and 12.6-67.2 µg/d; (b children: 0.8-4.5 µg/kg/d and 16.8-89.6 µg/d, (c adults: 0.6-3.0 µg/kg/d and 33.6-179.2 µg/d. CONCLUSIONS: The estimated exposure levels to selenium were higher than those recommended as optimum by international health organizations, representing a potential health risk. Nevertheless, estimated values are not high enough to produce selenosis.

  16. ESTADO NUTRICIONAL DE PREESCOLARES DE LA COMUNA ALTO BIOBIO Y SU RELACIÓN CON CARACTERÍSTICAS ETNODEMOGRÁFICAS NUTRITIONAL STATUS OF PRE-SCHOOL CHILDREN OF ALTO BIOBIO BOUROUGH AND ITS CORRELATION WITH ETHNO DEMOGRAPHIC FEATURES

    Directory of Open Access Journals (Sweden)

    Claudia Navarrete B

    2011-03-01

    Full Text Available Objetivo: Describir el estado nutricional de preescolares de la comuna Alto Biobio durante el período 20072009. Metodología: Estudio retrospectivo descriptivo del universo de preescolares evaluados nutricionalmente. La información se obtuvo del tarjetón de control de niño sano. Se determinaron los parámetros antropométricos P/T y T/E según referencia OMS y variables etnodemo-gráficas. Resultados: Fueron evaluados 1.144 preescolares, 65,7% correspondían a pehuenches y 52,3% eran mujeres. La prevalencia de obesidad fue 8,15%, 8,66% y 17,17% en pehuenches, mestizos y occidentales respectivamente; teniendo mayor riesgo de desnutrición en la etnia mestiza seguida por la pehuenche. La obesidad fue mayor (10,6% en varones, y el déficit de peso fue mayor en las niñas (5,3%. La talla baja fue mayor en los varones (25,3%. Conclusión: Coincidentemente con estudios previos, encontramos una mayor tendencia a la desnutrición con talla baja en pehuenches y a obesidad con talla normal en occidentales, resultados asociados a la extrema pobreza de la comuna.Aim: To describe the nutritional status of preschool children of Alto Bio Bio from year 2007 to 2009. Methods: Retrospective descriptive study of the universe of preschools children who were nutritionally evaluated. Data was obtained from the "Healthy Child Control" anthropometric parameters WIH and HIA according to WHO reference and ethno demographic variables were determined. Results: 1144 preschools were evaluated which were 65.7% pehuenches and 52.3% women. Obesity prevalence was 8.15%, 8.66% and 17.17% in pehuenches, mestizos and westerns respectively. There was a greater risk for malnutrition in mestizos followed by pehuenches. Obesity was higher in boys (10.6% and weight deficit was higher in girls (5.3%. Stunting was higher in men (25.3%. Conclusions: Coinciding with previous studies we found a tendency to short stature and malnutrition in pehuenches and to obesity in westerns, outcomes

  17. O eu e o outro no médio indígena: alto Rio Negro (AM The self and the other in indigenous secondary education: alto Rio Negro (AM

    Directory of Open Access Journals (Sweden)

    Dulce Maria Pompêo de Camargo

    2006-08-01

    Full Text Available As reflexões apresentadas estão calcadas nas experiências vivenciadas por nós em projetos de formação de professores índios e nos dados coletados em uma pesquisa de campo, no alto Rio Negro, no que se refere: a aos usos lingüísticos em sala de aula onde estudam alunos de dez a vinte etnias e línguas diferentes; b ao projeto político-pedagógico das escolas; c às dificuldades dos alunos em função de sua origem indígena. Para alcançar o objetivo proposto, apresentamos uma análise do 'sistema preventivo' de educação para jovens, proposto por D. Bosco, em meados do século XIX, e seguido, ainda hoje, pelos missionários salesianos que atuam na região. Tais reflexões podem subsidiar, de um lado, a apresentação de propostas que contribuam para a formulação de políticas de educação para o ensino médio indígena em todo o país e, de outro, contribuir para a construção de sistemas autônomos de educação, superando políticas integracionistas. Nossos principais interlocutores são autores ligados à perspectiva pós-colonial: Bhabha (2005, Hall (In: Sovik, 2003, Souza Santos (2000 e Shiva (2003.The reflections here presented are based on our experiences in projects to train Indian teachers and on the data collected in a field research, in the alto Rio Negro, with regard to: a the linguistic uses in classroom with students from ten to twenty different ethnic groups and languages; b the political-pedagogical project of the schools; c the difficulties faced by students because of their indigenous origin. To meet the objective proposed, we present an analysis of the 'prevention system' of youth education, proposed by D. Bosco in the mid-XIXth century, and still used by the Salesian missionaries who live in the region. Such reflections can support the presentation of proposals that contribute, on the one hand, to formulate educational policies for indigenous secondary education in Brazil and, on the other, to build autonomous

  18. The research reactors their contribution to the reactors physics

    International Nuclear Information System (INIS)

    The 19 october 2000, the french society of nuclear energy organized a day on the research reactors. This associated report of the technical session, reactors physics, is presented in two parts. The first part deals with the annual meeting and groups general papers on the pressurized water reactors, the fast neutrons reactors and the fusion reactors industry. The second part presents more technical papers about the research programs, critical models, irradiation reactors (OSIRIS and Jules Horowitz) and computing tools. (A.L.B.)

  19. Simwe model application on susceptibility analysis to linear erosion: a case study in Alto Douro wine region.

    Science.gov (United States)

    Fernandes, Joana; Bateira, Carlos; Soares, Laura; Faria, Ana; Moura, Rui; Gonçalves, José

    2016-04-01

    The wine production in Alto Douro Wine Region - one of the world's oldest regulated and demarcated wine region - is based on a slope system organized in agricultural terraces once supported exclusively by dry stone walls. It has been undergoing the necessary changes for the introduction of technological innovations partially associated to the mechanization of vineyards work. In this sense, different forms of terrain framing have been implemented, namely the substitution of stone walls by earth embankments. This evolution raises a group of problems related to the hydric soil erosion and landscape preservation, since Alto Douro Wine Region is classified as UNESCO World Heritage Site since 2001. The study area is mostly occupied by vineyards planted in the agriculture terraces without continuous vegetation, the flow proceeds superficially influenced by the weak infiltration capacity and hydraulic conductivity. So, because of this conditioning factor the erosive features present non-significant depth, and the length thereof is limited essentially by the slope of the land, where was registered 64 gullies and 78 rills This paper focuses on the evaluation of susceptibility to linear erosion, through the application of SIMWE (SIMulated Water Erosion), (Mitas and Mitasova, 1998), using a digital elevation model, with pixel of one square meter of spatial resolution, created through detail aerial photographs, (side pixel of 50 cm), submitted to automatic stereo-correlation procedures in Agisoft PhotoScan software. The results provided by the model are compared with hydrological characteristics of the soil, (infiltration capacity, and hydraulic conductivity), soil texture, and soil structure parameters (identified by electrical resistivity measurement) where obtained from field monitoring. This approach demonstrates an association between the spatial distribution of erosive features with high values of soil saturation, and reduced water discharge (10-110 cm3/s), that are

  20. One piece reactor removal

    International Nuclear Information System (INIS)

    Japan Research Reactor No.3 (JRR-3) was the first reactor consisting of 'Japanese-made' components alone except for fuel and heavy water. After reaching its initial critical state in September 1962, JRR-3 had been in operation for 21 years until March 1983. It was decided that the reactor be removed en-bloc in view of the work schedule, cost and management of the reactor following the removal. In the special method developed jointly by the Japanese Atomic Energy Research Institute and Shimizu Construction Co., Ltd., the reactor main unit was cut off from the building by continuous core boring, with its major components bound in the block with biological shield material (heavy concrete), and then conveyed and stored in a large waste store building constructed near the reactor building. Major work processes described in this report include the cutting off, lifting, horizontal conveyance and lowering of the reactor main unit. The removal of the JRR-3 reactor main unit was successfully carried out safely and quickly by the en-block removal method with radiation exposure dose of the workers being kept at a minimum. Thus the high performance of the en-bloc removal method was demonstrated and, in addition, valuable knowhow and other data were obtained from the work. (Nogami, K.)

  1. Reactor Materials Research

    International Nuclear Information System (INIS)

    The activities of the Reactor Materials Research Department of the Belgian Nuclear Research Centre SCK-CEN in 2000 are summarised. The programmes within the department are focussed on studies concerning (1) fusion, in particular mechanical testing; (2) Irradiation Assisted Stress Corrosion Cracking (IASCC); (3) nuclear fuel; and (4) Reactor Pressure Vessel Steel (RPVS)

  2. The fusion reactor

    International Nuclear Information System (INIS)

    Basic principles of the fusion reactor are outlined. Plasma heating and confinement schemes are described. These confinement systems include the linear Z pinch, magnetic mirrors and Tokamaks. A fusion reactor is described and a discussion is given of its environmental impact and its fuel situation. (R.L.)

  3. Polymerization Reactor Engineering.

    Science.gov (United States)

    Skaates, J. Michael

    1987-01-01

    Describes a polymerization reactor engineering course offered at Michigan Technological University which focuses on the design and operation of industrial polymerization reactors to achieve a desired degree of polymerization and molecular weight distribution. Provides a list of the course topics and assigned readings. (TW)

  4. Reactor Materials Research

    Energy Technology Data Exchange (ETDEWEB)

    Van Walle, E

    2001-04-01

    The activities of the Reactor Materials Research Department of the Belgian Nuclear Research Centre SCK-CEN in 2000 are summarised. The programmes within the department are focussed on studies concerning (1) fusion, in particular mechanical testing; (2) Irradiation Assisted Stress Corrosion Cracking (IASCC); (3) nuclear fuel; and (4) Reactor Pressure Vessel Steel (RPVS)

  5. Gas-cooled reactors

    International Nuclear Information System (INIS)

    The present study is the second part of a general survey of Gas Cooled Reactors (GCRs). In this part, the course of development, overall performance and present development status of High Temperature Gas Cooled Reactors (HTCRs) and advances of HTGR systems are reviewed. (author)

  6. Light water reactor program

    Energy Technology Data Exchange (ETDEWEB)

    Franks, S.M.

    1994-12-31

    The US Department of Energy`s Light Water Reactor Program is outlined. The scope of the program consists of: design certification of evolutionary plants; design, development, and design certification of simplified passive plants; first-of-a-kind engineering to achieve commercial standardization; plant lifetime improvement; and advanced reactor severe accident program. These program activities of the Office of Nuclear Energy are discussed.

  7. Reactor Safety Analysis

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on reactor safety is to develop expertise in probabilistic and deterministic reactor safety analysis. The research programme consists of two main activities, in particular the development of software for reliability analysis of large systems and participation in the international PHEBUS-FP programme for severe accidents. Main achievements in 1999 are reported

  8. Light water type reactor

    International Nuclear Information System (INIS)

    The nuclear reactor of the present invention prevents disruption of a reactor core even in a case of occurrence of entire AC power loss event, and even if a reactor core disruption should occur, it prevents a rupture of the reactor container due to excess heating. That is, a high pressure water injection system and a low pressure water injection system operated by a diesel engine are disposed in the reactor building in addition to an emergency core cooling system. With such a constitution, even if an entire AC power loss event should occur, water can surely be injected to the reactor thereby enabling to prevent the rupture of the reactor core. Even if it should be ruptured, water can be sprayed to the reactor container by the low pressure water injection system. Further, if each of water injection pumps of the high pressure water injection system and the low pressure water injection system can be driven also by motors in addition to the diesel engine, the pump operation can be conducted more certainly and integrally. (I.S.)

  9. Relación entre factores micro- estructurales e impacto repetido en aleaciones de alto cromo para bolas de molino.

    Directory of Open Access Journals (Sweden)

    E. Albertin

    2008-01-01

    Full Text Available Las aleaciones de alto cromo son empleadas para la fabricación de bolas de molino en industrias de procesamiento de minerales. Los usuarios y fabricantes requieren lograr mejores resultados técnicos-económicos en sus aplicaciones, por lo que necesitan aumentar los conocimientos relacionados con los aspectos estructurales de estos materiales. En este trabajo se realiza una investigación con vistas a establecer relaciones entre la estructura de las aleaciones y su comportamiento ante el impacto repetido que es un fenómeno característico en estos procesos. Se funden bolas con varias aleaciones hipo eutécticas, eutécticas, e hipereutécticas; se prueban en un equipo que simula el impacto repetido. Los resultados permiten comprobar los buenos resultados de aleaciones hipo eutécticas con relaciones de Cr/C altas y a su vez altos contenidos de Cr y de aleaciones eutécticas para menores relaciones de Cr/C y menores contenidos de Cr, en ambos casos los carburos eutécticos son de forma simétrica, regulares y no forman redes continuas de carburos asimétricos bordeando los granos, que presentan peores comportamiento en el impacto repetido y que son el caso de las hipoeutécticas con bajas relaciones Cr/C y las hipereutécticas donde aparecen también grandes carburos primarios.High Chromium alloys are used to manufacture grinding balls for the Industry of Construction Materials. Customers and users need to improve their knowledge about the relationships between microstructure and the parts damage in these alloys to obtain better technical-economics results. In this paper the results of a research to obtain different microstructures of eutectics, hipoeutectics and hipereutectics alloys are presented, searching for the lesser damage in these alloys. These alloys are tested in a repeated impact testing machine that simulate its mechanical behaviour .The results show a good behaviour for hipoeutectic alloys with high relations of Cr/C and high

  10. Eclipsing binaries and fast rotators in the Kepler sample. Characterization via radial velocity analysis from Calar Alto

    Science.gov (United States)

    Lillo-Box, J.; Barrado, D.; Mancini, L.; Henning, Th.; Figueira, P.; Ciceri, S.; Santos, N.

    2015-04-01

    Context. The Kepler mission has searched for planetary transits in more than two hundred thousand stars by obtaining very accurate photometric data over a long period of time. Among the thousands of detected candidates, the planetary nature of around 15% has been established or validated by different techniques. But additional data are needed to characterize the rest of the candidates and reject other possible configurations. Aims: We started a follow-up program to validate, confirm, and characterize some of the planet candidates. In this paper we present the radial velocity analysis of those that present large variations, which are compatible with being eclipsing binaries. We also study those showing high rotational velocities, which prevents us from reaching the necessary precision to detect planetary-like objects. Methods: We present new radial velocity results for 13 Kepler objects of interest (KOIs) obtained with the CAFE spectrograph at the Calar Alto Observatory and analyze their high-spatial resolution (lucky) images obtained with AstraLux and the Kepler light curves of some interesting cases. Results: We have found five spectroscopic and eclipsing binaries (group A). Among them, the case of KOI-3853 is of particular interest. This system is a new example of the so-called heartbeat stars, showing dynamic tidal distortions in the Kepler light curve. We have also detected duration and depth variations of the eclipse. We suggest possible scenarios to explain such an effect, including the presence of a third substellar body possibly detected in our radial velocity analysis. We also provide upper mass limits to the transiting companions of six other KOIs with high rotational velocities (group B). This property prevents the radial velocity method from achieving the necessary precision to detect planetary-like masses. Finally, we analyze the large radial velocity variations of two other KOIs, which are incompatible with the presence of planetary-mass objects

  11. Nuevo modelo matemático para la distribución de carga en el horno alto

    Directory of Open Access Journals (Sweden)

    Jiménez, J.

    1998-05-01

    Full Text Available A mathematical model for burden distribution in the blast furnace, has been developed. A set of operational variables related with the charging system (Paul Wurth plus other parameters related with the burden itself, such as ore and coke repose angles, weights discharged and the effect of the uprising gas, have been taken into account. These data are processed by modern computer tools. As a result, the burden distribution inside the blast furnace is obtained. Every time that a charge is added to the blast furnace, the model updates the burden distribution. The approach employed is based on considering each burden layer described by a set of interrelated polynomials. It has been tested comparing its results with burden layers obtained in a physical model of the blast furnace (scale 1/10. After installation in Aceralia blast furnace B control computers, the model is currently being employed as a tool for process control.

    El modelo matemático desarrollado describe la distribución de carga en el tragante de un horno alto. Se ha empleado un conjunto de variables operacionales relacionadas con el sistema de carga (Paul Wurth, junto con otras obtenidas de la carga, tales como el peso descargado, los ángulos de reposo de los materiales y el efecto del gas al atravesar el horno. Estos datos se procesan mediante herramientas informáticas. Como resultado, se obtiene la distribución de carga en el horno. Cada vez que se introduce una carga, el modelo actualiza la distribución. La aproximación empleada considera el perfil de cada capa de carga, el cual está descrito por un conjunto de polinomios interrelacionados. Los resultados se comparan con la distribución obtenida en un modelo físico del horno (escala 1/10. Tras su instalación en los ordenadores de proceso del horno alto B de Aceralia, el modelo se emplea actualmente para el control del mismo.

  12. OBTENÇÃO DE BARRAS DE CEREAIS DE CAJU AMEIXA COM ALTO TEOR DE FIBRAS

    Directory of Open Access Journals (Sweden)

    LUíSA HELENA ELLERY MOUR�O

    2010-03-01

    Full Text Available

    As barras de cereais vêm apresentando crescimento constante junto ao público consumidor. Considerando o crescimento do segmento de barras de cereais no setor de alimentos este trabalho teve como objetivos desenvolver barras de cereais de caju ameixa com alto teor de fi bras utilizando ingredientes funcionais e matéria-prima regional; inovar no uso de ingredientes não utilizados nas formulações convencionais; realizar análises físicas, físicoquímicas e químicas e avaliar as propriedades nutricionais. Formulou-se dois tipos de barras, (F1 e (F2 a partir de uma formulação básica (FB. A FB foi processada utilizando-se aveia, fl ocos de arroz, leite em pó desnatado, açúcar mascavo, glucose de milho, gordura vegetal hidrogenada, canela, lecitina de soja e fl ocos de milho. As formulações F1 e F2 diferiram da FB nas concentrações dos ingredientes, na adição de linhaça, de caju ameixa, de castanha de caju, na substituição da gordura vegetal hidrogenada por óleo de canola e na retirada dos fl ocos de milho. A FB resultou 94,39 kcal e F1 e F2 em 95,69 kcal e 101,06 kcal respectivamente em 25g utilizando os coefi cientes de ATWATER. A modifi - cação dos ingredientes provocou aumento signifi cativo no teor de fi bra alimentar tornando as barras F1 e F2 produtos com alto teor de fi bra alimentar (10,58g e 12,69g/100g, respectivamente. Conclui-se que as barras de cereais F1 e F2 podem ser indicadas para indivíduos com constipação intestinal, dislipidemias e sobrepeso. Além disso, ambas poderiam ser enquadradas no conceito de alimento funcional, devido ao fato de conterem um maior teor de fi bras dietéticas que contribuem para a manutenção da boa saúde.

  13. Crecimiento del maíz en vertisoles con alto aluminio en la Baixada Maranhense pre-Amazonia, Brasil.

    Directory of Open Access Journals (Sweden)

    Alessandro Costa-da Silva

    2014-07-01

    Full Text Available El objetivo de este trabajo fue evaluar el crecimiento del maíz en suelos con alto contenido de aluminio. Se midió el efecto del Al3+ en raíces y la cantidad de materia seca (raíz, hoja y tallo de maíz. Se efectuó la caracterización físico-química de cuatro muestras de suelo con alto aluminio colectadas del horizonte Ap, en tres municipios de la región conocida como Baixada Maranhense (Pre-Amazonia, Brasil: Santa Rita (SR, Arari (AR y Vitoria do Mearim (VM y un testigo colectado en el municipio de São Luís, Área del Núcleo de Tecnología Rural (T. El estudio, ejecutado en 2009, se llevó a cabo en invernadero y se utilizó 2 dm3 de suelo por maceta. Asimismo las muestras fueron divididas en muestras con y sin fertilización. La variación en la longitud de la raíz y de materia seca de las hojas difirió significativamente entre tratados con y sin fertilizante, excepto en la muestra de la localidad T. La producción de materia seca de raíz, tallo y hoja fue mayor en todos los suelos cuando se fertilizó. El suelo testigo también superó a todos los demás en cuanto a producción de materia seca en la raíz, posiblemente como resultado de una menor cantidad de Al3+ (1,2 cmolc/dm3 en comparación con los suelos SR, AR y VM (6,8; 8,0 y 7,0 cmolc/dm3 respectivamente. Se concluye la fertilización reduce el efecto detrimental del aluminio en la producción de maíz en la Baixada Maranhense.

  14. The geomechanical characterization of the rocky mass foundation of the Tijuco Alto hydroelectric power plant, Ribeira River, Sao Paulo/Parana States, Brazil; Caracterizacao geomecanica do Macico de Fundacao da UHE Tijuco Alto (Rio Ribeira - SP/PR)

    Energy Technology Data Exchange (ETDEWEB)

    Figueiredo, Amarilis Lucia Casteli de

    1996-07-01

    This work has as its main objective the geomechanical characterization on the future rocky mass foundation of the Tijuco Alto dam, sited at the Ribeira river, in the cities of Ribeirao, Sao Paulo state and Adrianopolis, Parana state, Brazil, owned by the Companhia Brasileira de Aluminio (Brazilian company of Aluminium). To reach that target, field studies were made to qualify the geotechnical parameters of the rocky mass, in the axis area open galleries. It was also used in situ deformability and stress test results performed in those galleries, that were reinterpreted for a better adaptation of the mass values. The knowledge of the mass inherent characteristics together with the laboratories test results, allowed for the geomechanical classification applications in several different gallery sectors. The geomechanical data obtained allowed through mathematical expressions, to reach the rocky mass values correlations of interest to the work (deformability and strength), that could be compared to the in situ test results. That analysis permitted, besides the classification critical system evaluation, the geomechanical characterization of the rocky mass, focusing its ability to the dam arch construction. (author)

  15. Selection of sweet potato clones for the region Alto Vale do Jequitinhonha Seleção de clones de batata-doce para a região do Alto Vale do Jequitinhonha

    Directory of Open Access Journals (Sweden)

    Valter C de Andrade Júnior

    2009-09-01

    Full Text Available An experiment was carried out from December 2005 to July 2006, in the Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM, in Diamantina, Minas Gerais State, Brazil, aiming at selecting sweet potato clones for the Alto Vale do Jequitinhonha. We evaluated nine clones from the UFVJM germplasm bank, using cultivars Brazlândia Branca, Brazlândia Roxa, and Princesa as controls. The experimental design was blocks at random, with four replications. Plants were harvested seven months after transplanting. We assessed the fresh mass yield of vines and roots, as well as root shape and resistance to soil insects. Genotypes did not differ from each other for the fresh mass yield of vines (ranging from 3.81 to 11.76 t ha-1. The total yield of roots ranged from 22.0 to 45.4 t ha-1 and clones BD-06, BD-113-TO, BD-15, BD-38, BD-25, BD-61, and cultivar Princesa had statistically the highest figures. However, only clone BD-06 significantly overcame the control cultivars Brazlândia Branca and Brazlândia Roxa. Clone BD-06 had also the highest commercial yield of roots (38.58 t ha-1, statically similar to most of the other clones and cultivar Princesa (25.87 t ha-1, but superior to cultivars Brazlândia Branca and Brazlândia Roxa. Most of the clones tested, including clone BD-06, produced good shaped roots and were resistant to soil insects. Considering our results, clone BD-06 stood out as a good option for growing sweet potato in the Upper Valley of Jequitinhonha.Com o objetivo de selecionar clones de batata-doce para a região do alto Vale do Jequitinhonha, conduziu-se um experimento de dezembro de 2005 a julho de 2006, no CampusJK da Universidade Federal dos Vales do Jequitinhonha e Mucuri, UFVJM, município de Diamantina-MG. Foram avaliados nove clones de batata-doce pertencentes ao banco de germoplasma da UFVJM, juntamente com as cultivares Brazlândia Branca, Brazlândia Roxa e Princesa, utilizadas como testemunhas. O delineamento experimental

  16. Naval propulsion reactors

    International Nuclear Information System (INIS)

    This article deals with the design and exploitation of naval propulsion reactors, mainly of PWR-type. The other existing or conceivable types of reactors are also presented: 1 - specificities of nuclear propulsion (integration in the ship, marine environment, maneuverability, instantaneous availability, conditions of exploitation-isolation, nuclear safety, safety authority); 2 - PWR-type reactor (stable operation, mastered technology, general design, radiation protection); 3 - other reactor types; 4 - compact or integrated loops architecture; 5 - radiation protection; 6 - reactor core; 7 - reactivity control (core lifetime, control means and mechanisms); 8 - core cooling (natural circulation, forced circulation, primary flow-rate program); 9 - primary loop; 10 - pressurizer; 11 - steam generators and water-steam secondary loop; 12 - auxiliary and safety loops; 13 - control instrumentation; 14 - operation; 15 - nuclear wastes and dismantling. (J.S.)

  17. Iris reactor conceptual design

    International Nuclear Information System (INIS)

    IRIS (International Reactor Innovative and Secure) is a modular, integral, light water cooled, low-to-medium power (100-350 MWe) reactor which addresses the requirements defined by the US DOE for Generation IV reactors, i.e., proliferation resistance, enhanced safety, improved economics and fuel cycle sustainability. It relies on the proven technology of light water reactors and features innovative engineering, but it does not require new technology development. This paper discusses the current reference IRIS design, which features a 1000 MWt thermal core with proven 5%-enriched uranium oxide fuel and five-year long straight burn fuel cycle, integral reactor vessel housing helical tube steam generators and immersed spool pumps. Other major contributors to the high level of safety and economic attractiveness are the safety by design and optimized maintenance approaches, which allow elimination of some classes of accidents, lower capital cost, long operating cycle, and high capacity factors. (author)

  18. Research reactor DHRUVA

    International Nuclear Information System (INIS)

    DHRUVA, a 100 MWt research reactor located at the Bhabha Atomic Research Centre, Bombay, attained first criticality during August, 1985. The reactor is fuelled with natural uranium and is cooled, moderated and reflected by heavy water. Maximum thermal neutron flux obtained in the reactor is 1.8 X 1014 n/cm2/sec. Some of the salient design features of the reactor are discussed in this paper. Some important features of the reactor coolant system, regulation and protection systems and experimental facilities are presented. A short account of the engineered safety features is provided. Some of the problems that were faced during commissioning and the initial phase of power operation are also dealt upon

  19. Reactor core monitoring method

    Energy Technology Data Exchange (ETDEWEB)

    Mori, Michitsugu [Tokyo Electric Power Co., Inc. (Japan); Kanemoto, Shigeru; Enomoto, Mitsuhiro; Ebata, Shigeo

    1998-05-06

    The present invention provides a method of monitoring the state of coolant flow in a reactor of a BWR power plant. Namely, a plurality of local power region monitors (LPRM) are disposed to the inside of the reactor core for monitoring a power distribution. Signals of at least two optional LPRM detectors situated at positions different in axial or radial positions of the reactor core are obtained. General fluctuation components which nuclear hydrothermally fluctuate in overall reactor core are removed from the components of the signals. Then, correlational functions between these signals are determined. The state of coolant flow in the reactor is monitored based on the correlational function. When the axial flowing rate and radial flow interference are monitored, the accuracy upon monitoring axial and radial local behaviors of coolants can be improved by thus previously removing the general fluctuation components from signals of LPRM detectors and extracting local void information near to LPRM detectors at high accuracy. (I.S.)

  20. Physics of nuclear reactors

    International Nuclear Information System (INIS)

    This manual covers all the aspects of the science of neutron transport in nuclear reactors and can be used with great advantage by students, engineers or even reactor experts. It is composed of 18 chapters: 1) basis of nuclear physics, 2) the interactions of neutrons with matter, 3) the interactions of electromagnetic radiations and charged-particles with matter, 4) neutron slowing-down, 5) resonant absorption, 6) Doppler effect, 7) neutron thermalization, 8) Boltzmann equation, 9) calculation methods in neutron transport theory, 10) neutron scattering, 11) reactor reactivity, 12) theory of the critical homogenous pile, 13) the neutron reflector, 14) the heterogeneous reactor, 15) the equations of the fuel cycle, 16) neutron counter-reactions, 17) reactor kinetics, and 18) calculation methods in neutron scattering

  1. Mirror reactor surface study

    International Nuclear Information System (INIS)

    A general survey is presented of surface-related phenomena associated with the following mirror reactor elements: plasma first wall, ion sources, neutral beams, director converters, vacuum systems, and plasma diagnostics. A discussion of surface phenomena in possible abnormal reactor operation is included. Several studies which appear to merit immediate attention and which are essential to the development of mirror reactors are abstracted from the list of recommended areas for surface work. The appendix contains a discussion of the fundamentals of particle/surface interactions. The interactions surveyed are backscattering, thermal desorption, sputtering, diffusion, particle ranges in solids, and surface spectroscopic methods. A bibliography lists references in a number of categories pertinent to mirror reactors. Several complete published and unpublished reports on surface aspects of current mirror plasma experiments and reactor developments are also included

  2. FBR type reactor

    International Nuclear Information System (INIS)

    A circular neutron reflector is disposed vertically movably so as to surround the outer circumference of a reactor core barrel. A reflector driving device comprises a driving device main body attracted to the outer wall surface of the reactor barrel by electromagnetic attraction force and an inertia body disposed above the driving device main body vertically movably. A reflector is connected below the reactor driving device. At the initial stage, a spontaneous large current is supplied to upper electromagnetic repulsion coils of the reflector driving device, impact electromagnetic repulsion force is caused between the inertia body and the reflector driving device, so that the driving device main body moves downwardly by a predetermined distance and stopped. The reflector driving device can be lowered in a step-like manner to an appropriate position suitable to restart the reactor during stoppage of the reactor core by conducting spontaneous supply of current repeatedly to the upper electromagnetic repulsion coils. (I.N.)

  3. TRIGA research reactors

    International Nuclear Information System (INIS)

    TRIGA (Training, Research, Isotope production, General-Atomic) has become the most used research reactor in the world with 65 units operating in 24 countries. The original patent for TRIGA reactors was registered in 1958. The success of this reactor is due to its inherent level of safety that results from a prompt negative temperature coefficient. Most of the neutron moderation occurs in the nuclear fuel (UZrH) because of the presence of hydrogen atoms, so in case of an increase of fuel temperature, the neutron spectrum becomes harder and neutrons are less likely to fission uranium nuclei and as a consequence the power released decreases. This inherent level of safety has made this reactor fit for training tool in university laboratories. Some recent versions of TRIGA reactors have been designed for medicine and industrial isotope production, for neutron therapy of cancers and for providing a neutron source. (A.C.)

  4. Status of French reactors

    Energy Technology Data Exchange (ETDEWEB)

    Ballagny, A. [Commissariat a l`Energie Atomique, Saclay (France)

    1997-08-01

    The status of French reactors is reviewed. The ORPHEE and RHF reactors can not be operated with a LEU fuel which would be limited to 4.8 g U/cm{sup 3}. The OSIRIS reactor has already been converted to LEU. It will use U{sub 3}Si{sub 2} as soon as its present stock of UO{sub 2} fuel is used up, at the end of 1994. The decision to close down the SILOE reactor in the near future is not propitious for the start of a conversion process. The REX 2000 reactor, which is expected to be commissioned in 2005, will use LEU (except if the fast neutrons core option is selected). Concerning the end of the HEU fuel cycle, the best option is reprocessing followed by conversion of the reprocessed uranium to LEU.

  5. Nuclear reactor design

    CERN Document Server

    2014-01-01

    This book focuses on core design and methods for design and analysis. It is based on advances made in nuclear power utilization and computational methods over the past 40 years, covering core design of boiling water reactors and pressurized water reactors, as well as fast reactors and high-temperature gas-cooled reactors. The objectives of this book are to help graduate and advanced undergraduate students to understand core design and analysis, and to serve as a background reference for engineers actively working in light water reactors. Methodologies for core design and analysis, together with physical descriptions, are emphasized. The book also covers coupled thermal hydraulic core calculations, plant dynamics, and safety analysis, allowing readers to understand core design in relation to plant control and safety.

  6. Compact torsatron reactors

    International Nuclear Information System (INIS)

    Low-aspect-ratio torsatron configurations could lead to compact stellarator reactors with R0 = 8--11m, roughly one-half to one-third the size of more conventional stellarator reactor designs. Minimum-size torsatron reactors are found using various assumptions. Their size is relatively insensitive to the choice of the conductor parameters and depends mostly on geometrical constraints. The smallest size is obtained by eliminating the tritium breeding blanket under the helical winding on the inboard side and by reducing the radial depth of the superconducting coil. Engineering design issues and reactor performance are examined for three examples to illustrate the feasibility of this approach for compact reactors and for a medium-size (R0 ≅ 4 m,/bar a/ /approx lt/ 1 m) copper-coil ignition experiment. 26 refs., 11 figs., 7 tabs

  7. Multi-purpose reactor

    International Nuclear Information System (INIS)

    The Multi-Purpose-Reactor (MPR), is a pool-type reactor with an open water surface and variable core arrangement. Its main feature is plant safety and reliability. Its power is 22MWth, cooled by light water and moderated by beryllium. It has platetype fuel elements (MTR type, approx. 20%. enriched uranium) clad in aluminium. Its cobalt (Co60) production capacity is 50000 Ci/yr, 200Ci/gr. The distribution of the reactor core and associated control and safety systems is essentially based on the following design criteria: - upwards cooling flow, to waive the need for cooling flow inversion in case the reactor is cooled by natural convection if confronted with a loss of pumping power, and in order to establish a superior heat transfer potential (a higher coolant saturation temperature); - easy access to the reactor core from top of pool level with the reactor operating at full power, in order to facilitate actual implementation of experiments. Consequently, mechanisms associated to control and safety rods s,re located underneath the reactor tank; - free access of reactor personnel to top of pool level with the reactor operating at full power. This aids in the training of personnel and the actual carrying out of experiments, hence: - a vast water column was placed over the core to act as radiation shielding; - the core's external area is cooled by a downwards flow which leads to a decay tank beyond the pool (for N16 to decay); - a small downwards flow was directed to stream downwards from above the reactor core in order to drag along any possibly active element; and - a stagnant hot layer system was placed at top of pool level so as to minimize the upwards coolant flow rising towards pool level

  8. The CAREM reactor and present currents in reactor design

    International Nuclear Information System (INIS)

    INVAP has been working on the CAREM project since 1983. It concerns a very low power reactor for electrical energy generation. The design of the reactor and the basic criteria used were described in 1984. Since then, a series of designs have been presented for reactors which are similar to CAREM regarding the solutions presented to reduce the chance of major nuclear accidents. These designs have been grouped under different names: Advanced Reactors, Second Generation Reactors, Inherently Safe Reactors, or even, Revolutionary Reactors. Every reactor fabrication firm has, at least, one project which can be placed in this category. Presently, there are two main currents of Reactor Design; Evolutionary and Revolutionary. The present work discusses characteristics of these two types of reactors, some revolutionary designs and common criteria to both types. After, these criteria are compared with CAREM reactor design. (Author)

  9. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities in the Division of Reactor Engineering in fiscal 1977 are described. Works of the Division are development of multi-purpose Very High Temperature Gas Cooled Reactor, fusion reactor engineering, and development of Liquid Metal Fast Breeder Reactor for Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, heat transfer and fluid dynamics, reactor and nuclear instrumentation, dynamics analysis and control method development, fusion reactor technology, and Committee on Reactor Physics. (Author)

  10. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

    Research and development activities in the Department of Reactor Engineering in fiscal 1983 are described. The work of the Department is closely related to development of multipurpose Very High Temperature Gas Cooled Reactor and Fusion Reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, integral experiment and analysis, fusion neutronics, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, and safeguards technology, and activities of the Committee on Reactor Physics. (author)

  11. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities conducted in Reactor Engineering Division in fiscal 1975 are summarized in this report. Works in the division are closely related to the development of multi-purpose High-temperature Gas Cooled Reactor, the development of Liquid Metal Fast Breeder Reactor by Power Reactor and Nuclear Fuel Development Corporation, and engineering research of thermonuclear fusion reactor. Many achievements are described concerning nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, heat transfer and fluid dynamics, reactor and nuclear instrumentation, dynamics analysis and control method development, fusion reactor technology and activities of the Committee on Reactor Physics. (auth.)

  12. Avaliação do estado nutricional e da composição corporal das crianças índias do Alto Xingu e da etnia Ikpeng Nutritional status and body composition of two South American native populations - Alto Xingu and Ikpeng

    Directory of Open Access Journals (Sweden)

    Ulysses Fagundes

    2004-12-01

    Full Text Available OBJETIVOS: Avaliar o estado nutricional e a composição corporal de crianças índias das populações alto-xinguana e Ikpeng, comparando as populações. MÉTODOS: Avaliamos 95 crianças do Alto Xingu e 69 Ikpeng com idades entre 24 e 117 meses. Obtivemos dados sobre idade, peso, estatura, pregas cutâneas, circunferência do braço e impedância bioelétrica. Calculamos escores z para peso, estatura e estimativas da composição corporal. Tendo como referência o NCHS 2000, determinamos diagnóstico de baixo peso e baixa estatura como sendo inferior a -2 escores z para os indicadores peso/idade ou índice de massa corporal/idade e estatura/idade, respectivamente. Para obesidade, o ponto de corte foi 2 escores do indicador índice de massa corporal/idade. As massas corporais magra e gordurosa foram calculadas a partir de duas equações validadas na literatura. RESULTADOS: Diagnosticamos baixa estatura em 8,4% das crianças do Alto Xingu e em 37,7% das Ikpeng (p OBJECTIVES: To assess the nutritional and body composition of two Brazilian indigenous populations by comparing their nutritional status. METHODS: 95 children from Alto Xingu and 69 from Ikpeng were evaluated, ages ranged from 24 to 117 months. The study was performed in the Xingu Indigenous Park. Data collected were: age, weight, height, skin folds, arm circumference, resistance and reactance. The z-scores were calculated and classified according to the parameters defined by the National Center for Health Statistics (NCHS 2000. Shortness was defined as length or stature below -2, underweight as body mass index below -2, and overweight as body mass index above 2. RESULTS: Among children from Alto Xingu, the prevalence of shortness was 8.4%, while among Ikpengs the prevalence was 37.7% (p < 0.001. Underweight was diagnosed in 12.5% of Ikpeng's children. Values of fat-free mass were greater for children from Alto Xingu and no case of obesity was found. CONCLUSION: In this study, Ikpeng

  13. Reactor performance calculations for water reactors

    International Nuclear Information System (INIS)

    The principles of nuclear, thermal and hydraulic performance calculations for water cooled reactors are discussed. The principles are illustrated by describing their implementation in the UKAEA PATRIARCH scheme of computer codes. This material was originally delivered as a course of lectures at the Technical University of Helsinki in Summer of 1969.

  14. Fourth Generation Reactor Concepts

    International Nuclear Information System (INIS)

    Concerns over energy resources availability, climate changes and energy supply security suggest an important role for nuclear energy in future energy supplies. So far nuclear energy evolved through three generations and is still evolving into new generation that is now being extensively studied. Nuclear Power Plants are producing 16% of the world's electricity. Today the world is moving towards hydrogen economy. Nuclear technologies can provide energy to dissociate water into oxygen and hydrogen and to production of synthetic fuel from coal gasification. The introduction of breeder reactors would turn nuclear energy from depletable energy supply into an unlimited supply. From the early beginnings of nuclear energy in the 1940s to the present, three generations of nuclear power reactors have been developed: First generation reactors: introduced during the period 1950-1970. Second generation: includes commercial power reactors built during 1970-1990 (PWR, BWR, Candu, Russian RBMK and VVER). Third generation: started being deployed in the 1990s and is composed of Advanced LWR (ALWR), Advanced BWR (ABWR) and Passive AP600 to be deployed in 2010-2030. Future advances of the nuclear technology designs can broaden opportunities for use of nuclear energy. The fourth generation reactors are expected to be deployed by 2030 in time to replace ageing reactors built in the 1970s and 1980s. The new reactors are to be designed with a view of the following objectives: economic competitiveness, enhanced safety, minimal radioactive waste production, proliferation resistance. The Generation IV International Forum (GIF) was established in January 2000 to investigate innovative nuclear energy system concepts. GIF members include Argentina, Brazil, Canada, Euratom, France Japan, South Africa, South Korea, Switzerland, United Kingdom and United States with the IAEA and OECD's NEA as permanent observers. China and Russia are expected to join the GIF initiative. The following six systems

  15. Safety of research reactors

    International Nuclear Information System (INIS)

    The number of research reactors that have been constructed worldwide for civilian applications is about 651. Of the reactors constructed, 284 are currently in operation, 258 are shut down and 109 have been decommissioned. More than half of all operating research reactors worldwide are over thirty years old. During this long period of time national priorities have changed. Facility ageing, if not properly managed, has a natural degrading effect. Many research reactors face concerns with the obsolescence of equipment, lack of experimental programmes, lack of funding for operation and maintenance and loss of expertise through ageing and retirement of the staff. Other reactors of the same vintage maintain effective ageing management programmes, conduct active research programmes, develop and retain high calibre personnel and make important contributions to society. Many countries that operate research reactors neither operate nor plan to operate power reactors. In most of these countries there is a tendency not to create a formal regulatory body. A safety committee, not always independent of the operating organization, may be responsible for regulatory oversight. Even in countries with nuclear power plants, a regulatory regime differing from the one used for the power plants may exist. Concern is therefore focused on one tail of a continuous spectrum of operational performance. The IAEA has been sending missions to review the safety of research reactors in Member States since 1972. Some of the reviews have been conducted pursuant to the IAEA' functions and responsibilities regarding research reactors that are operated within the framework of Project and Supply Agreements between Member States and the IAEA. Other reviews have been conducted upon request. All these reviews are conducted following procedures for Integrated Safety Assessment of Research Reactors (INSARR) missions. The prime objective of these missions has been to conduct a comprehensive operational safety

  16. “Entre propietarios y migrantes: los encuentros y desencuentros entre Colonos y Aguarunas en el alto mayo”

    Directory of Open Access Journals (Sweden)

    Kenneth E. Garces Montes

    2013-10-01

    Full Text Available La dinámica de conflictos entre colonos y nativos en el Alto Mayo, ha dado como producto continuosenfrentamientos entre caseríos de colonos y comunidades nativas colindantes, así como una seriede procesos judiciales por “usurpación de tierras”, en los cuales no se logra una ejecución efectiva dela sentencia a pesar que esta sea favorable a los nativos, debido a la distancia social que existe entrelos operadores estatales y el conflicto real. Por su parte los mecanismos de convivencia entre colonosy nativos se inician mediante el alquiler de tierras, diseñada como una fórmula temporal para quelos colonos se retiren una vez vencido el plazo del alquiler, sin embargo la ampliación de los plazosprovoca que los mismos adquieran vocación de permanencia.Una serie de actores, de primer, segundo y tercer orden interactúan alrededor de las dos dinámicasde relacionamiento mencionadas; tales como las ONGs, el Estado, organizaciones indígenas, einclusive mafias de traficantes de tierras. Ante esta realidad tan compleja conviene hacer el ejerciciode plantear propuestas de adaptabilidad (o subsistencia de las comunidades nativas, en las quese visualice la supervivencia de lo local frente a lo global en lo que a demarcación de tierras de lascomunidades nativas se refiere.

  17. Formación de equipos de alto desempeño y estrategias gerenciales en proyectos de empresas publicitarias

    Directory of Open Access Journals (Sweden)

    ROSA ESTHER PALAMARY D'AGUILLO

    2012-01-01

    Full Text Available Actualmente las empresas publicitarias se ven presionadas a competir en un entorno donde productos y estrategias se asemejan cada día más debido a la globalización. El éxito de estas empresas dependerá de la práctica de la innovación en sus actividades así como del desarrollo del capital humano. El objetivo de este trabajo es determinar la relación entre formación de equipos de alto desempeño y estrategias gerenciales en proyectos de empresas publicitarias; sustentada bajo una investigación descriptiva correlacional de campo transversal, con un diseño no experimental descriptivo transeccional. Se tomó como población a las empresas ubicadas en el municipio de Maracaibo (Venezuela pertenecientes a la Federación de Agencias Publicitarias. Los resultados obtenidos sirven para otras empresas que deseen asumir este reto.

  18. UNAPAL -Abanico 75: nuevo cultivar de zapallo con alto contenido de materia seca en el fruto para fines agroindustriales

    Directory of Open Access Journals (Sweden)

    Diosdado Baena García

    2010-07-01

    Full Text Available A partir de tres cruzamientos dialélicos entre poblaciones de zapallo, con diferente grado de endocría (S0 x S0, (S1 x S1 y (S2 x S2, se seleccionaron dos híbridos y dos líneas de zapallo, por su alto contenido de materia seca en fruto y producción por planta. Con los genotipos seleccionados se formaron siete poblaciones híbridas, que se estabilizaron genéticamente mediante cruzamientos fraternales y se evaluaron en diferentes ambientes del Valle del Cauca. Se seleccionó la población 1, que presentó una producción por planta entre 29 - 32 kg; peso promedio del fruto entre 5 -6 kg.; 4 -5 frutos por planta; 24 -26% de materia seca en el fruto; formato globular acostillado de color externo verde intenso y color de pulpa amarillo intenso a naranja (12 a 15 abanico de Roche. Esta población fue registrada en el Instituto Colombiano Agropecuario ICA con el nombre de UNAPAL-Abanico-75.

  19. Prevalencias de sobrepeso y obesidad en niños y adolescentes de barrios con alto NBI de Puerto Madryn

    Directory of Open Access Journals (Sweden)

    Botterón, Tania Vanesa

    2005-01-01

    Full Text Available Estudios previos indican que Pto. Madryn presenta características de una población en transición nutricional, con bajos índices de desnutrición e incremento en la incidencia de sobrepeso infantil. En relación a ello en el presente trabajo se evalúa la prevalencia de sobrepeso y obesidad en niños y adolescentes de barrios con alto promedio de familias con NBI y valorados con tres referencias: NCHS, SAP-IOTF y Frisancho, 1991. Se relevaron peso, estatura total, pliegues subescapular y tricipital y se calculó el IMC en 656 niños de ambos sexos (6 a 16 años. El análisis de datos se realizó según las referencias indicadas para comparar sus valoraciones. Los resultados obtenidos hasta el presente muestran para ambos sexos un promedio de 60 a 75 % de valores de IMC normales, un 25 % de sobrepeso y entre un 3 a 7 % de obesidad Esto se relaciona con lo hallado por otros autores, por cuanto el sobrepeso y la obesidad son independientes de la condición socioeconómica de los individuos y, contar con datos actualizados y transferirlos a las entidades de aplicación correspondientes, redundarán en una disminución del riesgo de obesidad y de enfermedades crónicas no transmisibles (ECNT.

  20. Pesquerías globalizadas: revisitando a la comunidad marítima en el Alto Golfo de California

    Directory of Open Access Journals (Sweden)

    Gloria Ciria Valdéz-Gardea

    2010-01-01

    Full Text Available Puerto Peñasco, ubicado en el Alto Golfo de California, protagoniza las consecuencias de las transformaciones estructurales de las pesquerías en México. Esta área muestra las desarticulaciones provocadas por el crecimiento urbano y turístico que ha dejado marginada a la producción pesquera como actividad económica identitaria. El desarrollo turístico ha impactado diferencialmente a los pobladores más aún; las percepciones de estos impactos en la vida social, cultural y económica de los residentes son diversas. La antropología marítima presenta desafíos en el estudio de lo que llamo pesquerías globalizadas: espacios en transición, híbridos en donde se gestan entornos nuevos los cuales se circunscriben, se apropian y compiten por los espacios, paisajes y recursos naturales, vividos, sentidos y practicados tradicionalmente por los usuarios de los recursos: los pescadores.

  1. ALTO DÉFICIT DE CONOCIMIENTOS Y PERCEPCIONES ADECUADAS SOBRE ALIMENTACIÓN EN GESTANTES DEL HOSPITAL APOYO IQUITOS, 2012

    Directory of Open Access Journals (Sweden)

    Irene Paima

    2012-12-01

    Full Text Available Los conocimientos y percepciones sobre los alimentos ingeridos en la gestación tienen una vital importancia porque dependiendo de una buena alimentación en esta etapa, periodo en el que se incrementan notablemente las necesidades nutritivas para el beneficio del binomio madre – feto, será de mayor ayuda para prevenir en cada nueva gestación un déficit nutricional. Se realizó un estudio de descriptivo y transversal, la población estuvo conformada por todas las gestantes que acudieron al servicio de control pre natal del Hospital Iquitos Cesar Garay García. La muestra fue de 220 gestantes se utilizó un cuestionario validado por expertos. Se evidenció un alto porcentaje de conocimiento deficiente (43% sobre alimentación y percepciones inadecuadas (65% sobre alimentación en las gestantes de nuestro estudio. Se evidencia la necesidad de mejorar  el conocimiento sobre los alimentos importantes para presentar una gestación saludable. 

  2. Chemical and mineralogical characterization of elbaites from the Alto Quixaba pegmatite, Seridó province, NE Brazil

    Directory of Open Access Journals (Sweden)

    Ferreira Ana C.M.

    2005-01-01

    Full Text Available The Alto Quixaba pegmatite, Seridó region, northeastern Brazil, is a 60º/80ºSW-trending subvertical dike discordantly intruded into biotite schists of the Upper Neoproterozoic Seridó Formation. It has three distinct mineralogical and textural zones, besides a replacement body that cuts the pegmatite at its central portion and in which occur, among other gem minerals, colored elbaites. Elbaites usually occur as prismatic crystals, elongate according to the c-axis, with rounded faces and striations parallel to this axis. Optically, crystals are uniaxial negative with strong pleochroism; refractive index extraordinary axis = 1.619-1.622 and ordinary axis = 1.639-1.643, birefringence between 0.019 and 0.021, average relative density of 3.07, and the following unit cell parameters: ao = 15.845 Å, co = 7.085 Å and V = 1540.476 Å. There is alkali deficiency in the X site of 12-17%. The elbaites are relatively enriched in MnO (1.69 to 2.87% and ZnO (up to 2.98%.

  3. Chemical and mineralogical characterization of elbaites from the Alto Quixaba pegmatite, Seridó province, NE Brazil.

    Science.gov (United States)

    Ferreira, Ana C M; Ferreira, Valderez P; Soares, Dwight R; Vilarroel-Leo, Hugo S

    2005-12-01

    The Alto Quixaba pegmatite, Seridó region, northeastern Brazil, is a 60 degrees/80 degrees SW-trending subvertical dike discordantly intruded into biotite schists of the Upper Neoproterozoic Seridó Formation. It has three distinct mineralogical and textural zones, besides a replacement body that cuts the pegmatite at its central portion and in which occur, among other gem minerals, colored elbaites. Elbaites usually occur as prismatic crystals, elongate according to the c-axis, with rounded faces and striations parallel to this axis. Optically, crystals are uniaxial negative with strong pleochroism; refractive index extraordinary axis = 1.619-1.622 and ordinary axis = 1.639-1.643, birefringence between 0.019 and 0.021, average relative density of 3.07, and the following unit cell parameters: ao = 15.845 A, co = 7.085 A and V = 1540.476 A. There is alkali deficiency in the X site of 12-17%. The elbaites are relatively enriched in MnO (1.69 to 2.87%) and ZnO (up to 2.98%). PMID:16341446

  4. Grupo Semco y las prácticas de recursos humanos de alto compromiso, una ventaja competitiva

    Directory of Open Access Journals (Sweden)

    Juan Nicolás Montoya Monsalve

    2012-12-01

    Full Text Available El presente artículo de reflexión trata de determinar si las prácticas de recursos humanos orientadas a mejorar el compromiso de los empleados con la empresa reportan una identidad común y diferenciadora del resto de empresas, logrando de esta forma una ventaja competitiva. Además de la fundamentación teórica, para analizar el objetivo principal señalado se han utilizado elementos del método del caso, que ayudan a determinar nuevas variables de estudio y permiten comprobar si existen realidades empresariales que consigan alcanzar, a través de las prácticas de alto compromiso, un mejor desempeño y una mayor pertinencia con las organizaciones, y estudiar cómo lo han conseguido. En esta parte de análisis empírico, se analiza la organización Semco, una compañía brasileña que ha atraído el interés de los expertos por las innovadoras prácticas en la gestión del talento humano, su diseño organizativo y la generación de una identidad propia, como base de su ventaja competitiva.

  5. Motor hidráulico de alto torque de cilindros y cigüeñal

    Directory of Open Access Journals (Sweden)

    Guillermo Arias Polo

    2008-01-01

    Full Text Available El presente trabajo contiene una nueva invención ®, de un tipo de motor hidráulico, para las aplicaciones llamadas de alto torque y baja velocidad de rotación, donde como característica, no es necesario interponer algún escalón de reducción de velocidad entre el motor y el equipo a ser movido. Esta sencilla maquinaria en su construcción tiene el atractivo de utilizar componentes de tecnología muy común en la práctica, de bajo costo, y de poca complejidad. Está compuesto esencialmente por tres cilindros hidráulicos de doble efecto y una válvula distribuidora de flujo rotatoria, montado todo en un bastidor. Tiene la novedad patentada que los tres cilindros hidráulicos mencionados realizan trabajo útil tanto a la ida como al regreso de su carrera, hecho este que le confiere una densidad de torque/masa superior a las soluciones conocidas. Se presenta un prototipo que trabajó en condiciones reales de producción en el ingenio Habana Libre de Cuba, con resultados muy prometedores. Se presenta además, el diseño de un nuevo modelo más robusto, mejorando las prestaciones del prototipo experimental.

  6. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

    This report summarizes the research and development activities in the Department of Reactor Engineering during the fiscal year of 1992 (April 1, 1992-March 31, 1993). The major Department's programs promoted in the year are the assessment of the high conversion light water reactor, the design activities of advanced reactor system and development of a high energy proton linear accelerator for the engineering applications including TRU incineration. Other major tasks of the Department are various basic researches on the nuclear data and group constants, the developments of theoretical methods and codes, the reactor physics experiments and their analyses, fusion neutronics, radiation shielding, reactor instrumentation, reactor control/diagnosis, thermohydraulics and technology developments related to the reactor physics facilities. The cooperative works to JAERI's major projects such as the high temperature gas cooled reactor or the fusion reactor and to PNC's fast reactor project were also progressed. The activities of the Research Committee on Reactor Physics are also summarized. (author)

  7. Reactor engineering department annual report

    International Nuclear Information System (INIS)

    This report summarizes the research and development activities in the Department of Reactor Engineering during the fiscal year of 1989 (April 1, 1989 - March 31, 1990). One of major Department's programs is the assessment of the high conversion light water reactor and the design activities of advanced reactor system. Development of a high energy proton linear accelerator for the nuclear engineering including is also TRU incineration promoted. Other major tasks of the Department are various basic researches on nuclear data and group constants, theoretical methods and code development, on reactor physics experiments and analyses, fusion neutronics, radiation shielding, reactor instrumentation, reactor control/diagnosis, thermohydraulics, technology assessment of nuclear energy and technology developments related to the reactor physics facilities. The cooperative works to JAERI's major projects such as the high temperature gas cooled reactor or the fusion reactor and to PNC's fast reactor project also progressed. The activities of the Research Committee on Reactor Physics are also summarized. (author)

  8. Slurry reactor design studies

    Energy Technology Data Exchange (ETDEWEB)

    Fox, J.M.; Degen, B.D.; Cady, G.; Deslate, F.D.; Summers, R.L. (Bechtel Group, Inc., San Francisco, CA (USA)); Akgerman, A. (Texas A and M Univ., College Station, TX (USA)); Smith, J.M. (California Univ., Davis, CA (USA))

    1990-06-01

    The objective of these studies was to perform a realistic evaluation of the relative costs of tublar-fixed-bed and slurry reactors for methanol, mixed alcohols and Fischer-Tropsch syntheses under conditions where they would realistically be expected to operate. The slurry Fischer-Tropsch reactor was, therefore, operated at low H{sub 2}/CO ratio on gas directly from a Shell gasifier. The fixed-bed reactor was operated on 2.0 H{sub 2}/CO ratio gas after adjustment by shift and CO{sub 2} removal. Every attempt was made to give each reactor the benefit of its optimum design condition and correlations were developed to extend the models beyond the range of the experimental pilot plant data. For the methanol design, comparisons were made for a recycle plant with high methanol yield, this being the standard design condition. It is recognized that this is not necessarily the optimum application for the slurry reactor, which is being proposed for a once-through operation, coproducing methanol and power. Consideration is also given to the applicability of the slurry reactor to mixed alcohols, based on conditions provided by Lurgi for an Octamix{trademark} plant using their standard tubular-fixed reactor technology. 7 figs., 26 tabs.

  9. FBR type reactor

    International Nuclear Information System (INIS)

    The present invention provides an FBR type reactor in which the combustion of reactor core fuels is controlled by reflectors, and the position of a reflector driving device can be controlled even during shut down of the reactor. Namely, the reflector driving device is attracted to the outer wall surface of a reactor core barrel by electromagnetic attraction force. An inertia body is disposed vertically movably to the upper portion of the reflector driving device. Magnetic repulsive coils generate instantaneous magnetic repulsive force between the inertia body and the reflector driving device. With such a constitution, the reflector driving device can be driven by using magnetic repulsion of the electromagnetic repulsive coils and inertia of the inertia body. As a result, not only the reflectors can be elevated at an ultraslow speed during normal reactor operation, but also fine position adjustment for the reflector driving device, as well as fine position adjustment of the reflectors required upon restart of the reactor can be conducted by lowering the reflector driving device during shut down of the reactor. (I.S.)

  10. Reactor water sampling device

    International Nuclear Information System (INIS)

    The present invention concerns a reactor water sampling device for sampling reactor water in an in-core monitor (neutron measuring tube) housing in a BWR type reactor. The upper end portion of a drain pipe of the reactor water sampling device is attached detachably to an in-core monitor flange. A push-up rod is inserted in the drain pipe vertically movably. A sampling vessel and a vacuum pump are connected to the lower end of the drain pipe. A vacuum pump is operated to depressurize the inside of the device and move the push-up rod upwardly. Reactor water in the in-core monitor housing flows between the drain pipe and the push-up rod and flows into the sampling vessel. With such a constitution, reactor water in the in-core monitor housing can be sampled rapidly with neither opening the lid of the reactor pressure vessel nor being in contact with air. Accordingly, operator's exposure dose can be reduced. (I.N.)

  11. Test reactor technology

    International Nuclear Information System (INIS)

    The Reactor Development Program created a need for engineering testing of fuels and materials. The Engineering Test Reactors were developed around the world in response to this demand. The design of the test reactors proved to be different from that of power reactors, carrying the fuel elements closer to the threshold of failure, requiring more responsive instrumentation, more rapid control element action, and inherent self-limiting behavior under accident conditions. The design of the experimental facilities to exploit these reactors evolved a new, specialized, branch of engineering, requiring a very high-lvel scientific and engineering team, established a meticulous concern with reliability, the provision for recovery from their own failures, and detailed attention to possible interactions with the test reactors. This paper presents this technology commencing with the Materials Testing Reactor (MTR) through the Fast Flux Test Facility, some of the unique experimental facilities developed to exploit them, but discusses only cursorily the experiments performed, since sample preparation and sample analyses were, and to some extent still are, either classified or proprietary. The Nuclear Engineering literature is filled with this information

  12. Advanced reactor licensing issues

    International Nuclear Information System (INIS)

    In July 1986 the US Nuclear Regulatory Commission issued a Policy Statement on the Regulation of Advanced Nuclear Power Plants. As part of this policy advanced reactor designers were encouraged to interact with NRC early in the design process to obtain feedback regarding licensing requirements for advanced reactors. Accordingly, the staff has been interacting with the Department of Energy (DOE) and its contractors on the review of three advanced reactor conceptual designs: one modular High Temperature Gas-Cooled Reactor (MHTGR) and two Liquid Metal Reactors (LMRs). As a result of these interactions certain safety issues associated with these advanced reactor designs have been identified as key to the licensability of the designs as proposed by DOE. The major issues in this regard are: (1) selection and treatment of accident scenarios; (2) selection of siting source term; (3) performance and reliability of reactor shutdown and decay heat removal systems; (4) need for conventional containment; (5) need for conventional emergency evacuation; (6) role of the operator; (7) treatment of balance of plant; and (8) modular approach. This paper provides a status of the NRC review effort, describes the above issues in more detail and provides the current status and approach to the development of licensing guidance on each

  13. Nuclear reactor power monitor

    International Nuclear Information System (INIS)

    The device of the present invention monitors phenomena occurred in a nuclear reactor more accurately than usual case. that is, the device monitors a reactor power by signals sent from a great number of neutron monitors disposed in the reactor. The device has a means for estimating a phenomenon occurred in the reactor based on the relationship of a difference of signals between each of the great number of neutron monitors to the positions of the neutron monitors disposed in the reactor. The estimation of the phenomena is conducted by, for example, conversion of signals sent from the neutron monitors to a code train. Then, a phenomenon is estimated rapidly by matching the code train described above with a code train contained in a data base. Further. signals sent from the neutron monitors are processed statistically to estimate long term and periodical phenomena. As a result, phenomena occurred in the reactor are monitored more accurately than usual case, thereby enabling to improve reactor safety and operationability. (I.S.)

  14. Reactor Sharing Program

    International Nuclear Information System (INIS)

    Support utilization of the RINSC reactor for student and faculty instructions and research. The Department of Energy award has provided financial assistance during the period 9/29/1995 to 5/31/2001 to support the utilization of the Rhode Island Nuclear Science Center (RINSC) reactor for student and faculty instruction and research by non-reactor owning educational institutions within approximately 300 miles of Narragansett, Rhode Island. Through the reactor sharing program, the RINSC (including the reactor and analytical laboratories) provided reactor services and laboratory space that were not available to the other universities and colleges in the region. As an example of services provided to the users: Counting equipment, laboratory space, pneumatic and in-pool irradiations, demonstrations of sample counting and analysis, reactor tours and lectures. Funding from the Reactor Sharing Program has provided the RINSC to expand student tours and demonstration programs that emphasized our long history of providing these types of services to the universities and colleges in the area. The funding have also helped defray the cost of the technical assistance that the staff has routinely provided to schools, individuals and researchers who have called on the RINSC for resolution of problems relating to nuclear science. The reactor has been featured in a Public Broadcasting System documentary on Pollution in the Arctic and how a University of Rhode Island Professor used Neutron Activation Analysis conducted at the RINSC to discover the sources of the ''Arctic Haze''. The RINSC was also featured by local television on Earth Day for its role in environmental monitoring

  15. Determination of research reactor safety parameters by reactor calculations

    International Nuclear Information System (INIS)

    Main research reactor safety parameters such as power density peaking factors, shutdown margin and temperature reactivity coefficients are treated. Reactor physics explanation of the parameters is given together with their application in safety evaluation performed as part of research reactor operation. Reactor calculations are presented as a method for their determination assuming use of widely available computer codes. (author)

  16. Reactor de plasma

    OpenAIRE

    Erra Serrabasa, Pilar; Molina Mansilla, Ricardo; Beltrán Serra, Eric

    2008-01-01

    Reactor de plasma. Se trata de un reactor de plasma que puede trabajar en un amplio rango de presión, desde el vacío y presiones reducidas hasta la presión atmosférica y presiones superiores. Adicionalmente el reactor de plasma tiene la capacidad de regular otros parámetros importantes y permite su uso para el tratamiento de muestras de tipología muy diversa, como por ejemplo las de tamaño relativamente grande o de superficie rugosa.

  17. Integral nuclear reactor

    International Nuclear Information System (INIS)

    The invention deals with an inprovement of the design of an integral pressurized water nuclear reactor. A typical embodyment of the invention includes a generally cylindrical pressure vessel that is assembled from three segments which are bolted together at transverse joints to form a pressure tight unit that encloses the steam generator and the reactor. The new construction permits primary to secondary coolant heat exchange and improved control rod drive mecanisms which can be exposed for full service access during reactor core refueling, maintenance and inspection

  18. Microfluidic electrochemical reactors

    Science.gov (United States)

    Nuzzo, Ralph G.; Mitrovski, Svetlana M.

    2011-03-22

    A microfluidic electrochemical reactor includes an electrode and one or more microfluidic channels on the electrode, where the microfluidic channels are covered with a membrane containing a gas permeable polymer. The distance between the electrode and the membrane is less than 500 micrometers. The microfluidic electrochemical reactor can provide for increased reaction rates in electrochemical reactions using a gaseous reactant, as compared to conventional electrochemical cells. Microfluidic electrochemical reactors can be incorporated into devices for applications such as fuel cells, electrochemical analysis, microfluidic actuation, pH gradient formation.

  19. Licensed operating reactors

    International Nuclear Information System (INIS)

    The Operating Units Status Report --- Licensed Operating Reactors provides data on the operation of nuclear units as timely and accurately as possible. This information is collected by the Office of Information Resources Management from the Headquarters staff on NRC's Office of Enforcement (OE), from NRC's Regional Offices, and from utilities. The three sections of the report are: monthly highlights and statistics for commercial operating units, and errata from previously reported data; a compilation of detailed information on each unit, provided by NRC's Regional Offices, OE Headquarters and the utilities; and an appendix for miscellaneous information such as spent fuel storage capability, reactor-years of experience and non- power reactors in the US

  20. First Algerian research reactor

    International Nuclear Information System (INIS)

    In 1985, both the Algerian Commissariat of New Energies and the Argentine National Atomic Energy Commission plus the firm INVAP S.E., started a series of mutual visits aimed at defining the mechanisms for cooperation in the nuclear field. Within this framework, a commercial contract was undersigned covering the supply of a low-power reactor (RUN), designed for basic and applied research in the fields of reactor physics and nuclear engineering. The reactor may also be used for performing experiences with neutron beams, for the irradiation of several materials and for the training of technicians, scientists and operators

  1. Course on reactor physics

    International Nuclear Information System (INIS)

    In Germany only few students graduate in nuclear technology, therefore the NPP operating companies are forced to develop their own education and training concepts. AREVA NP has started together with the Technical University of Dresden a one-week course ''reactor physics'' that includes the know-how of the nuclear power plant construction company. The Technical University of Dresden has the training reactor AKR-2 that is retrofitted by modern digital instrumentation and control technology that allows the practical training of reactor control.

  2. Fast Breeder Reactor studies

    International Nuclear Information System (INIS)

    This report is a compilation of Fast Breeder Reactor (FBR) resource documents prepared to provide the technical basis for the US contribution to the International Nuclear Fuel Cycle Evaluation. The eight separate parts deal with the alternative fast breeder reactor fuel cycles in terms of energy demand, resource base, technical potential and current status, safety, proliferation resistance, deployment, and nuclear safeguards. An Annex compares the cost of decommissioning light-water and fast breeder reactors. Separate abstracts are included for each of the parts

  3. Nuclear reactor theory

    International Nuclear Information System (INIS)

    This textbook is composed of two parts. Part 1 'Elements of Nuclear Reactor Theory' is composed of only elements but the main resource for the lecture of nuclear reactor theory, and should be studied as common knowledge. Much space is therefore devoted to the history of nuclear energy production and to nuclear physics, and the material focuses on the principles of energy production in nuclear reactors. However, considering the heavy workload of students, these subjects are presented concisely, allowing students to read quickly through this textbook. (J.P.N.)

  4. PWR type reactor

    International Nuclear Information System (INIS)

    From a PWR with a primary circuit, consisting of a reactor pressure vessel, a steam generator and a reactor coolant pump, hot coolant is removed by means of an auxiliary system containing h.p. pumps for feeding water into the primary circuit and being connected with a pipe, originating at the upper part, which has got at least one isolating value. This is done by opening an outlet in a part of the auxiliary system that has got a lower pressure than the reactor vessel. Preferably a water jet pump is used for mixing with the water of the auxiliary system. (orig.)

  5. Fusion Reactor Materials

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on fusion reactor materials is to contribute to the knowledge on the behaviour of fusion reactor materials and components during and after irradiation. Ongoing projects include: the study of the mechanical behaviour of structural materials under neutron irradiation; the investigation of the characteristics of irradiated first wall material such as beryllium; the detection of abrupt electrical degradation of insulating ceramics under high temperature and neutron irradiation; and the study of dismantling and waste disposal strategy for fusion reactors. Progress and achievements in these areas in 2000 are discussed

  6. International tokamak reactor

    International Nuclear Information System (INIS)

    Since 1978, the US, the European Communities, Japan, and the Soviet Union have collaborated on the definition, conceptual design, data base assessment, and analysis of critical technical issues for a tokamak engineering test reactor, called the International Tokamak Reactor (INTOR). During 1985-1986, this activity has been expanded in scope to include evaluation of concept innovations that could significantly improve the tokamak as a commercial reactor. The purposes of this paper are to summarize the present INTOR design concept and to summarize the work on concept innovations

  7. Joyo experimental reactor tour

    International Nuclear Information System (INIS)

    JAEA cooperation in remote monitoring focuses on the Joyo Experimental Reactor at the O'arai Research and Development Center. Joyo performs irradiation of test fuels to support development of the fast reactor cycle in Japan, both in international cooperation and in support of the Monju fast reactor, which is now undergoing reconstruction. The tour included an introduction at the model, a visit to the control room, entry into the containment vessel, and viewing of remote monitoring equipment in the Fresh Fuel Storage and at one of the Spent Fuel Ponds. (author)

  8. Fast Breeder Reactor studies

    Energy Technology Data Exchange (ETDEWEB)

    Till, C.E.; Chang, Y.I.; Kittel, J.H.; Fauske, H.K.; Lineberry, M.J.; Stevenson, M.G.; Amundson, P.I.; Dance, K.D.

    1980-07-01

    This report is a compilation of Fast Breeder Reactor (FBR) resource documents prepared to provide the technical basis for the US contribution to the International Nuclear Fuel Cycle Evaluation. The eight separate parts deal with the alternative fast breeder reactor fuel cycles in terms of energy demand, resource base, technical potential and current status, safety, proliferation resistance, deployment, and nuclear safeguards. An Annex compares the cost of decommissioning light-water and fast breeder reactors. Separate abstracts are included for each of the parts.

  9. nuclear reactor design calculations

    International Nuclear Information System (INIS)

    In this work , the sensitivity of different reactor calculation methods, and the effect of different assumptions and/or approximation are evaluated . A new concept named error map is developed to determine the relative importance of different factors affecting the accuracy of calculations. To achieve this goal a generalized, multigroup, multi dimension code UAR-DEPLETION is developed to calculate the spatial distribution of neutron flux, effective multiplication factor and the spatial composition of a reactor core for a period of time and for specified reactor operating conditions. The code also investigates the fuel management strategies and policies for the entire fuel cycle to meet the constraints of material and operating limitations

  10. Nuclear reactor internal structures

    International Nuclear Information System (INIS)

    The upper internal structures of the reactor are connected to the closing head so as to be readily removed with the latter and a skirt connected to the lower portion of said upper structures so as to surround the latter, extends under the control rods when they are removed from the reactor core. Through such an arrangement the skirt protects the control rods and supports the vessel closing-head and the core upper structures, whenever the head is severed from the vessel and put beside the latter in order to discharge the reactor

  11. Reactor monitoring system

    International Nuclear Information System (INIS)

    The present invention concerns a device for monitoring the inside of an FBR type reactor which can not be monitored by a usual optical camera. An ultrasonic camera having an excellent propagating property in a liquid metal sodium is scanned, and reflected waves of the ultrasonic waves are received as signals. The signals are processed by using a virtual realistic feeling (VR) technique such as a head mounting type image display (HMD) and a three dimensional pointing device. With such procedures, the inside of the FBR type reactor can be observed with such a realistic feeling that the inside of the FBR type reactor were seen directly. (I.S.)

  12. Research reactor support

    International Nuclear Information System (INIS)

    Research reactors (RRs) have been used in a wide range of applications including nuclear power development, basic physics research, education and training, medical isotope production, geology, industry and other fields. However, many research reactors are fuelled with High Enriched Uranium (HEU), are underutilized and aging, and have significant quantities of spent fuel. HEU inventories (fresh and spent) pose security risks Unavailability of a high-density-reprocessable fuel hinders conversion and limits back-end options and represents a survival dilemma for many RRs. Improvement of interim spent fuel storage is required at some RRs. Many RRs are under-utilized and/or inadequately funded and need to find users for their services, or permanently shut down and eventually decommission. Reluctance to decommission affect both cost and safety (loss of experienced staff ) and many shut down but not decommissioned RR with fresh and/or spent fuel at the sites invoke serious concern. The IAEA's research reactor support helps to ensure that research reactors can be operated efficiently with fuels and targets of lower proliferation and security concern and that operators have appropriate technology and options to manage RR fuel cycle issues, especially on long term interim storage of spent research reactor fuel. Availability of a high-density-reprocessable fuel would expand and improve back end options. The International Atomic Energy Agency provides assistance to Member States to convert research reactors from High Enriched Uranium fuel and targets (for medical isotope production) to qualified Low Enriched Uranium fuel and targets while maintaining reactor performance levels. The assistance includes provision of handbooks and training in the performance of core conversion studies, advice for the procurement of LEU fuel, and expert services for LEU fuel acceptance. The IAEA further provides technical and administrative support for countries considering repatriation of its

  13. Análise estatística multivariada dos dados de monitoramento de qualidade de água da Bacia do Alto Iguaçu

    OpenAIRE

    França, Marianne Schaefer

    2009-01-01

    Resumo: O principal objetivo deste trabalho foi realizar a análise multivariada dos dados de monitoramento de qualidade de água da bacia do Alto Iguaçu, utilizando-se das seguintes técnicas: Análise de omponentes Principais, Análise Fatorial e Análise de Agrupamentos. Adotaram-se duas estratégias de avaliação, a primeira refere-se à Análise Global da Bacia do Alto Iguaçu. Nesta análise as variáveis avaliadas oram 18 parâmetros de qualidade de água, incluindo a vazão. O objetivo foi identifi...

  14. Experiencias en el uso de hormigones de alto desempeño con áridos calizos, en estructuras sometidas a fuerte aerosol marino

    Directory of Open Access Journals (Sweden)

    Vitervo A. O´Reilly Díaz

    2008-01-01

    Full Text Available Los autores del presente trabajo realizaron una investigación con el objetivo de lograr hormigones de alto desempeño con áridos calizos .El diseño de estas mezclas fue usado en la producción de hormigones armados para las vigas de los puentes del pedraplen Turiguano-Cayo Coco, al norte de Cuba, los cuales están sometidos a la acción del aerosol marino. Se lograron hormigones de alto desempeño con áridos calizos, con el uso de un Método de dosificar hormigón que tiene en cuenta las formas del árido grueso.

  15. Rb-Sr geochronology from Barro Alto Complex, Goias: metamorphism evidence of high degree and continental collision around 1300 Ma ago in Central Brazil

    International Nuclear Information System (INIS)

    Rb-Sr geochronologic investigation carried out on rocks from the Barro Alto Complex, Goias, yielded iso chronic ages of 1266 +- 17 Ma, for felsic rocks from the granulite belt and 1330 +- 67 Ma, for gneisses belonging to the Juscelandia Sequence. Rb-Sr isotope measurements suggest that Barro Alto rocks have undergone an important metamorphic event during middle Proterozoic times, around 1300 Ma ago. During that event, volcanic and sedimentary rocks of Juscelandia Sequence, as well as the underlying gabbros-anorthosite layered complex, underwent deformation and recrystallization under amphibolite facies conditions. Deformation and metamorphism took place during the collision of two continental blocks, which resulted in a southeastward directed thrust complex, allowing the exposure of granulite slices from the middle-lower crust of the overthrusted block. (author)

  16. Environmental adaptation of the source of the subbasin of Rico Stream, Monte Alto - SP, Brazil Adequação ambiental da nascente da sub-bacia do Córrego Rico, Município de Monte Alto - SP

    Directory of Open Access Journals (Sweden)

    Teresa C. T. Pissarra

    2013-04-01

    Full Text Available The aim of this study was to define the photographic patterns that represent the use and occupation of the landcover of the "spring" of the Rico Stream subbasin, located at Monte Alto, state of São Paulo (SP, Brazil, for environmental adaptation regarding the Brazilian Forest Law. The mapping was performed using remote sensing techniques and visual interpretation of the World View image, followed by the digitalization of the net of drainage and vegetation (natural and agricultural at the AutoCad software with documents and field work. The study area has 2141.53 ha and the results demonstrated that the main crop is sugarcane with 546.34 ha, followed by 251.22 ha of pastures, 191.71 ha of perennial crops, 57.31 ha of Eucalyptus and 49.52 ha of onion, confirming the advance of sugarcane culture in the region. The region has 375.04 ha of areas of permanent preservation (APPs, and of this area it was found that only 72.17 ha (19.24% has arboreal vegetation or natural forest, and 302.87 ha of these areas need to be enriched and reforested with native vegetation from the region, according to the current legislation. The data of the area enable future proposals of models for environmental adaptation to the microbasin according to the current environmental legislation.Este trabalho teve como principal objetivo definir padrões fotográficos que representem o uso e a ocupação do solo da "cabeceira" de drenagem do Córrego Rico, localizada no Município de Monte Alto, Estado de São Paulo, para fins de adequação ambiental no que tange à legislação florestal brasileira. O mapeamento foi realizado utilizando técnicas de sensoriamento remoto e interpretação visual da imagem World View, seguida da digitalização da rede de drenagem e vegetações (naturais e agrícolas no AutoCad, com auxílio de documentos e trabalho de campo. A área de estudo apresenta uma superfície de 2.141,53 ha, e os resultados permitiram constatar que a principal cultura

  17. Factores asociados a la colonización por Streptococcus del grupo B en mujeres embarazadas de Los Altos, Chiapas Factors associated with group B Streptococcus colonization in pregnant women of Los Altos, Chiapas, Mexico

    Directory of Open Access Journals (Sweden)

    Moisés Ocampo-Torres

    2000-09-01

    Full Text Available OBJETIVO: Estimar la prevalencia de colonización por Streptococcus del grupo B (SGB en mujeres embarazadas de Los Altos, Chiapas, y analizar factores asociados a la misma. MATERIAL Y MÉTODOS: Es un estudio transversal realizado de febrero a septiembre de 1999 en tres hospitales públicos de segundo nivel en San Cristóbal de las Casas, Chiapas. A 910 mujeres que acudieron para atención de parto a dichos hospitales, se les tomaron muestras (vaginal y perianal para detección de SGB por cultivo e identificación de grupo y serotipo mediante aglutinación en látex. El análisis de factores asociados a la colonización se realizó medianteji² y modelos log-lineales. RESULTADOS: La colonización por SGB fue de 8.6% (IC 95% 6.8 - 10.5. Las mujeres con mayor probabilidad de colonización fueron las de > o = 5 embarazos, residentes de municipios marginados, de ocupación diferente al hogar y con jefe/jefa de familia agrícola (26.8%, RM= 7.25, IC 95% 1.83 - 28.67. CONCLUSIONES: Es necesario que las acciones para la prevención y control de infección por SGB se dirijan principalmente a la población de mayor riesgo de colonización en el área de estudio, con el fin de disminuir la transmisión perinatal de SGB.OBJECTIVE: To estimate the prevalence and analyze the factors associated with group B Streptococcus (GBS colonization in pregnant women of Los Altos, Chiapas, Mexico. MATERIAL AND METHODS: Between February and September 1999, a cross-sectional study was conducted among 910 women who sought delivery care at three public hospitals of San Cristobal de Las Casas, Chiapas. Vaginal and perianal samples were taken for GBS detection by bacteriological culture. Identification of groups and serotypes was performed using latex agglutination. The analysis of factors associated with colonization was done using chi-squared tests and log-linear modeling. RESULTS: GBS colonization was found in 8.6% (95% CI 6.8 - 10.5 of study subjects. Women with the

  18. Condições de nutrição em crianças Kamaiurá: povo indígena do Alto Xingu, Brasil Central Nutrition status in Kamaiurá Indian children: Alto Xingu, Central Brazil

    Directory of Open Access Journals (Sweden)

    Lenise Mondini

    2007-03-01

    Full Text Available Este estudo teve por objetivo avaliar o estado nutricional, incluindo a prevalência de anemia, de crianças Kamaiurá, povo indígena do Alto Xingu, Brasil Central. Foram estudadas 112 crianças menores de dez anos de idade em 2000/2001. O perfil do crescimento infantil foi descrito segundo a distribuição dos índices altura/idade e peso/altura expressos em escore-z da população de referência do National Center of Health Statistics - NCHS. Os diagnósticos de déficit de altura e da relação peso/altura e o diagnóstico de obesidade corresponderam, respectivamente, aos valores abaixo de -2 escores-z de altura/idade e peso/altura e aos valores acima de 2 escores-z de peso/altura. O diagnóstico de anemia foi determinado a partir de concentrações de hemoglobina sérica inferiores a 11 g/dl para crianças entre seis meses e cinco anos de idade e inferiores a 11,5 g/dl para as crianças com idade entre cinco e dez anos incompletos, conforme recomendação da OMS. Aproximadamente um terço das crianças apresentou déficit de crescimento, enquanto déficit de peso/altura e obesidade não foram diagnosticados entre elas. A anemia esteve presente em mais da metade das crianças índias estudadas, 15% delas apresentando anemia grave. Há necessidade de implementação de ações que visem a melhoria das condições socioambientais, de saúde e nutrição desse povo indígena.In order to evaluate nutritional and anemic status, 112 Indian children (Kamaiurá, aged from 0 to 119.9 months, from the Alto Xingu region of central Brazil were studied in 2000/2001. The international growth reference - NCHS was used to evaluate height and weight, according to the child's age and gender. Growth deficit (stunting and low weight status (wasting were determined when height-for-age and weight-for-height indices were below _2 z scores, respectively, and obesity status when the weight-for-height index was above 2 z scores. Stunting was observed in 1/3 of the

  19. Serpentes peçonhentas e ofidismo em Cruzeiro do Sul, Alto Juruá, Estado do Acre, Brasil Venomous snakes and ophidism in Cruzeiro do Sul, Alto Juruá, State of Acre, Brazil

    Directory of Open Access Journals (Sweden)

    Paulo Sérgio Bernarde

    2012-03-01

    Full Text Available Apesar da importância dos acidentes ofídicos na Saúde Pública, são relativamente poucas as pesquisas realizadas sobre esse tema no Brasil. Devido aos poucos estudos sobre ofidismo na Amazônia e especialmente no estado do Acre, trabalhos epidemiológicos são de grande relevância. Esse estudo apresenta a lista de serpentes peçonhentas e aspectos epidemiológicos dos acidentes ofídicos em Cruzeiro do Sul, região do Alto Juruá (Acre, verificando quais gêneros de serpentes são responsáveis pelos envenenamentos e aspectos que envolvem o acidente e o atendimento hospitalar. Os dados epidemiológicos foram coligidos a partir do SINAN (Sistema de Informações de Agravos de Notificação, no setor de vigilância epidemiológica do Hospital Regional do Juruá, no município de Cruzeiro do Sul. Sete espécies de serpentes peçonhentas foram registradas nesse município: três viperídeos (Bothrops atrox, Bothriopsis bilineata e Lachesis muta e quatro elapídeos (Micrurus hemprichii, M. lemniscatus, M. remotus and M. surinamensis. Durante o período de dois anos (agosto de 2007 a julho de 2009 foram registrados 195 casos de acidentes ofídicos. Cinquenta e um por cento dos acidentes foi classificado como laquético (Lachesis, seguido pelo botrópico (Bothrops e Bothriopsis com 38% e crotálico (Crotalus com 2%. Em 9% dos casos o gênero da serpente envolvida não foi informado. A maioria dos acidentes envolveu indivíduos adultos do gênero masculino em área rural, afetados principalmente nos membros inferiores. Os casos ocorreram mais frequentemente nos meses de novembro a abril, coincidindo com os maiores níveis pluviométricos. A maioria dos acidentes foi atribuída equivocadamente à serpente L. muta, tendo sido provavelmente causados por B. atrox.Despite the importance of accidents involving snakebites, research on this theme in Brazil is relatively rare, especially in the Amazon region. Due to the poor number of studies about ophidism

  20. Geografie e cartografie di guerra: "Il Trentino. Cenni geografici, storici, economici. Con un’appendice sull’Alto Adige" di Cesare Battisti (1915)

    OpenAIRE

    Matteo Proto

    2016-01-01

    Il Trentino. Cenni geografici, storici, economici. Con un’appendice sull’Alto Adige is a thematic atlas edited in 1915 by the Italian geographer and politician Cesare Battisti (1875-1916). The atlas represents an original and considerable work related to the exploitation and representation of a regional study. It also reproduces and applies the most important geographical theories of coeval Italian and international geography. In this work Battisti distanced himself from his traditional socia...

  1. Predicción del riesgo individual de alto coste sanitario para la identificación de pacientes crónicos complejos

    Directory of Open Access Journals (Sweden)

    Jordi Coderch

    2014-07-01

    Conclusiones: El consumo sanitario elevado se relaciona con la morbilidad crónica compleja. Un modelo basado en la edad, la morbilidad y la utilización previa es válido para predecir el riesgo de alto consumo, y así identificar la población diana de estrategias de atención proactiva para pacientes crónicos complejos.

  2. Discurso de autoayuda y comunicación: una lectura de La inteligencia emocional desde la escuela de Palo Alto

    OpenAIRE

    Canavire, Vanina Belén

    2011-01-01

    Desde su publicación en 1995, el libro Emotional Intelligence de Daniel Goleman se ha transformado en un fenómeno editorial. Se mantuvo en la lista de los libros más vendidos del The New York Times durante más de un año. Asimismo, alcanzó un alto nivel de ventas en Europa, Asia y Latinoamérica, y fue traducido a treinta idiomas.

  3. {sup 222} Rn exposure assessment in the caves of Parque Estadual Turistico do Alto Ribeira (PETAR); Avaliacao da exposicao ao {sup 222} Rn nas cavernas do Parque Estadual Turistico do Alto Ribeira (PETAR)

    Energy Technology Data Exchange (ETDEWEB)

    Alberigi, Simone

    2006-07-01

    In the present work, radon concentrations in six caves of PETAR - Parque Estadual Turistico do Alto Ribeira (High Ribeira River Touristic State Park) were carried out with Makrofol E solid state nuclear track detectors (SSNTD) and used to assess the annual effective dose received by regional tour guides. The park has four visitation centers: Santana, Ouro Grosso, Caboclos e Casa de Pedra and receives nearly 40,000 people annually. The caves evaluated were Couto, Agua Suja, Laje Branca, Morro Preto and Santana, from Santana center and Alambari de Baixo from Ouro Grosso center, for being the most frequently visited caves. The exposure period of the SSNTD was, at least, three months, over a period of 26 months, from October 2003 to November 2005.The {sup 222}Rn concentrations lay in a range from 153 Bq.m{sup -3} to 6607 Bq.m{sup -3} and we observed that, in general, for chilly weather, the radon levels decrease. The annual effective dose, considering the most realistic scenario, with geometric mean concentrations, an equilibrium factor of 0.5 and annual exposure time for each cave, varied from 0.2 mSv.a{sup -1} for the Couto cave, strongly ventilated, to 4.0 mSv.a{sup -1} for the Santana cave, the most frequently visited and no external communication. For the worst scenario, with arithmetic mean concentrations, equilibrium factor 1 and annual exposure time for all caves, the annual effective dose was 16.1 mSv.a{sup -1}. All assessed effective doses received by the tour guides are bellow 20 mSv.a{sup -1} suggested as an annual effective dose limit for occupational exposure by the International Commission of Radiological Protection (ICRP 60, 1990). (author)

  4. Study of power reactor dynamics by stochastic reactor oscillator method

    International Nuclear Information System (INIS)

    Stochastic reactor oscillator and cross correlation method were used for determining reactor dynamics characteristics. Experimental equipment, fast reactor oscillator (BOR-1) was activated by random pulses from the GBS-16 generator. Tape recorder AMPEX-SF-300 and data acquisition tool registered reactor response to perturbations having different frequencies. Reactor response and activation signals were cross correlated by digital computer for different positions of stochastic oscillator and ionization chamber

  5. Record of the sixth meeting of sub-group B, Palo Alto, California, 29-30 January 1979

    International Nuclear Information System (INIS)

    The items discussed include the collection of basic data, current methods of plutonium storage: base case, technological alternatives for plutonium storage, technological alternatives for plutonium transport, alternative institutional arrangements, assessment of base cases, plutonium recycle: reactor alternatives, plutonium recycle: reprocessing alternatives

  6. Aporte a la geología del Alto de Mogna, al norte de la depresión del Tulum, provincia de San Juan

    Directory of Open Access Journals (Sweden)

    J.J. Zambrano

    2005-06-01

    Full Text Available El Alto de Mogna, elevación estructural situada en la parte central de la provincia de San Juan, entre las provincias geológicas de las Sierras Pampeanas y la Precordillera Oriental, tiene rumbo este-oeste, transversal a las estructuras de las mencionadas cadenas montañosas, y separa dos depresiones tectónicas regionales: el valle del Bermejo, al norte, y la depresión de Tulum, al sur. En esta elevación estructural afloran fallas y pliegues, cuyo rumbo es prácticamente este-oeste, salvo en la zona adyacente a la Precordillera, donde se orientan de ONO a ESE. Los terrenos aflorantes son sedimentitas continentales mio-pliocenas. Las más antiguas son areniscas, limolitas y arcilitas rojizas y amarillentas, con abundante yeso. En la parte superior, al norte del Alto, afloran conglomerados pliocenos que quizás lleguen al Pleistoceno en sus intervalos más altos. El ascenso tectónico ha sido mayor en la zona próxima a la Precordillera Oriental, y disminuye gradualmente hacia el este. Esta actividad tectónica se ha producido durante el Plioceno y prácticamente todo el Cuaternario.

  7. Coal exploration in the Alto San Jorge area, Cordoba Department. Exploracion de carbones en el Ato San Jorge, Departamento de Cordoba

    Energy Technology Data Exchange (ETDEWEB)

    Ospina, L.H.; Oquendo, G.G. (Geominas Ltda, Medellin (Colombia))

    1989-01-01

    A Mining Feasibility Study in the Area of Alto San Jorge, Department of Cordoba, Colombia, was commissioned by CARBOCOL S.A. to the Consortium Geominas-NACI. An area of 800 Ka2 was explored to define surface mining possibilities within two subareas referred to as Alto San Jorge and San Pedro Ure. Rocks of Cretaceous, Tertiary and Quaternary age crop out in the zone. In the subarea Alto San Jorge the principal structure is a syncline with a south-north direction. The San Pedro Ure subarea is formed by undulations with flanks of low dip, the most important being the San Antonio Syncline because it contains the mining block. The geological study of the surface demonstrated the existence of coal in the Oligocene Cienaga de Oro Formation and the Niocene Cerrito Formation, with potential resources of 6.3 billion tons. The subsequent exploration of the subsoil, with 20.618 m of drilling, permitted determination of demonstrated reserves in the order of 2.9 billion tons within two areas. In the sector selected for the mine plan, in the area of San Pedro-Puerto Libertador, 7.791 m of drilling was accomplished to define a demonstrated reserve of 515 million tons of coal down to a depth of 200. The combustible type coal has 5.000 cal/g. Complete mining schedules were developed at the prefeasibility level for two surface mines with productions of 1.5 MMTY and 4 MMTY. 9 figs., 3 tabs., 28 refs.

  8. Nuclear reactor fuel elements

    International Nuclear Information System (INIS)

    An improved nuclear power reactor fuel element is described which consists of fuel rods, rod guide tubes and an end plate. The system allows direct access to an end of each fuel rod for inspection purposes. (U.K.)

  9. Reactor power control device

    International Nuclear Information System (INIS)

    The present invention concerns a method of controlling reactor power to shift it into a partial power operation upon occurrence of recycling pump tripping or loss of generator load. Operation state of a reactor is classified into a plurality of operation states based on values of the reactor core flow rate and the reactor power. Different insertion patterns for selected control rods are determined on every classified operation states. Then, an insertion pattern corresponding to the operation state upon occurrence of recycling pump tripping or loss of power generator load is carried out to shift into partial power operation. The operation is shifted to a load operation solely in the station while avoiding risks such as TPM scram. Then neutron fluxes are suppressed upon transient to increase margin of fuel integrity. Selected control rod pattern of the optimum reactivity is set to each of operation regions, thereby enabling to conduct flexible countermeasure so as to attain optimum operationability. (N.H.)

  10. Reactor pressure boundary materials

    International Nuclear Information System (INIS)

    With a long-term operation of nuclear power plants, the component materials are degraded under severe reactor conditions such as neutron irradiation, high temperature, high pressure and corrosive environment. It is necessary to establish the reliable and practical technologies for improving and developing the component materials and for evaluating the mechanical properties. Especially, it is very important to investigate the technologies for reactor pressure boundary materials such as reactor vessel and pipings in accordance with their critical roles. Therefore, this study was focused on developing and advancing the microstructural/micro-mechanical evaluation technologies, and on evaluating the neutron irradiation characteristics and radiation effects analysis technology of the reactor pressure boundary materials, and also on establishing a basis of nuclear material property database

  11. Reactor BR2. Introduction

    Energy Technology Data Exchange (ETDEWEB)

    Gubel, P

    2001-04-01

    The BR2 is a materials testing reactor and is still one of SCK-CEN's important nuclear facilities. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. During the last three years, the availability of the installation was maintained at an average level of 97.6 percent. In the year 2000, the reactor was operated for a total of 104 days at a mean power of 56 MW. In 2000, most irradiation experiments were performed in the CALLISTO PWR loop. The report describes irradiations achieved or under preparation in 2000, including the development of advanced facilities and concept studies for new programmes. An overview of the scientific irradiation programmes as well as of the R and D programme of the BR2 reactor in 2000 is given.

  12. Reactor BR2. Introduction

    Energy Technology Data Exchange (ETDEWEB)

    Gubel, P

    2002-04-01

    The BR2 materials testing reactor is one of SCK-CEN's most important nuclear facilities. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. In 2001, the reactor was operated for a total of 123 days at a mean power of 59 MW in order to satisfy the irradiation conditions of the internal and external programmes using mainly the CALLISTO PWR loop. The mean consumption of fresh fuel elements was 5.26 per 1000 MWd. Main achievements in 2001 included the development of a three-dimensional full-scale model of the BR2 reactor for simulation and prediction of irradiation conditions for various experiments; the construction of the FUTURE-MT device designed for the irradiation of fuel plates under representative conditions of geometry, neutron spectrum, heat flux and thermal-hydraulic conditions and the development of in-pile instrumentation and a data acquisition system.

  13. Reactor parameter simulation system

    International Nuclear Information System (INIS)

    A reactor parameter simulation system (RPSS) has been built with the capability of analyzing any reactor signals, decomposing those signals into their deterministic and stochastic components, then reconstructing new, simulated signals that possess the same statistical and correlation structure as the original plant variables. Important uses of the RPSS are for integration with reactor simulation software to provide tools for plant control strategy development, and for safety-study investigations of scenarios that can arise involving signal faults generated from degraded sensors. A third use of the RPSS is for frequency-domain filtering of reactor process variables contaminated with serially correlated noise, which is important for our ongoing development of expert systems for sensor-operability surveillance. 5 refs., 4 figs., 3 tabs

  14. Fusion Reactor Materials

    Energy Technology Data Exchange (ETDEWEB)

    Decreton, M

    2002-04-01

    The objective of SCK-CEN's programme on fusion reactor materials is to contribute to the knowledge on the radiation-induced behaviour of fusion reactor materials and components as well as to help the international community in building the scientific and technical basis needed for the construction of the future reactor. Ongoing projects include: the study of the mechanical and chemical (corrosion) behaviour of structural materials under neutron irradiation and water coolant environment; the investigation of the characteristics of irradiated first wall material such as beryllium; investigations on the management of materials resulting from the dismantling of fusion reactors including waste disposal. Progress and achievements in these areas in 2001 are discussed.

  15. New reactor type proposed

    CERN Multimedia

    2003-01-01

    "Russian scientists at the Research Institute of Nuclear Power Engineering in Moscow are hoping to develop a new reactor that will use lead and bismuth as fuel instead of uranium and plutonium" (1/2 page).

  16. Nuclear reactor fuel assembly

    International Nuclear Information System (INIS)

    A fuel assembly construction for liquid metal cooled fast breeder reactors is described in which the sub-assemblies carry a smaller proportion of parasitic material than do conventional sub-assemblies. (U.K.)

  17. Ageing of research reactors

    International Nuclear Information System (INIS)

    Historically, many of the research institutions were centred on a research reactor facility as main technological asset and major source of neutrons for research. Important achievements were made in time in these research institutions for development of nuclear materials technology and nuclear safety for nuclear energy. At present, ageing of nuclear research facilities among these research reactors and ageing of staff are considerable factors of reduction of competence in research centres. The safe way of mitigation of this trend deals with ageing management by so called, for power reactors, Plant Life Management and new investments in staff as investments in research, or in future resources of competence. A programmatic approach of ageing of research reactors in correlation with their actual and future utilisation, will be used as a basis for safety evaluation and future spending. (author)

  18. Experience with Kamini reactor

    International Nuclear Information System (INIS)

    Kamini is a 233U fuelled, 30 kW(th) research reactor. It is one of the best neutron source facility with a core average flux of 1012 n/cm2/s in IGCAR used for neutron radiography of active and nonradioactive objects, activation analysis and radiation physics research. The core consists of nine plate type fuel elements with a total fuel inventory of 590 g of 233U. Two safety control plates made of cadmium are used for start up and shutdown of the reactor. Three beam tubes, two-thimble irradiation site outside reflector and one irradiation site nearer to the core constitute the testing facilities of Kamini. Kamini attained first criticality on 29th October 96 and nominal power of 30 kW in September 1997. This paper covers the design features of the reactor, irradiation facilities and their utilities and operating experience of the reactor. (author)

  19. Dossier: research reactors

    International Nuclear Information System (INIS)

    Research reactors are used at the CEA (the French atomic energy commission) since many years. Their number has been reduced but they remain unique tools that CEA valorize continuously. The results of the programs involving such reactors are of prime importance for the operation of Electricite de France (EdF) park of existing power plants but also for the design of future nuclear power plants and future research reactors. This dossier presents three examples of research reactors in use at the CEA: Osiris and Orphee (CEA-Saclay), devoted to nuclear energy and fundamental research, respectively, and the critical mockups Eole, Minerve and Masurca (CEA-Cadarache) devoted to nuclear data libraries and neutronic calculation. (J.S.)

  20. Reactor vessel sealing plug

    International Nuclear Information System (INIS)

    This invention relates to an apparatus and method for sealing the cold leg nozzles of a nuclear reactor pressure vessel from a remote location during maintenance and inspection of associated steam generators and pumps while the pressure vessel and refueling canal are filled with water. The apparatus includes a sealing plug for mechanically sealing the cold leg nozzle from the inside of a reactor pressure vessel. The sealing plugs include a primary and a secondary O-ring. An installation tool is suspended within the reactor vessel and carries the sealing plug. The tool telescopes to insert the sealing plug within the cold leg nozzle, and to subsequently remove the plug. Hydraulic means are used to activate the sealing plug, and support means serve to suspend the installation tool within the reactor vessel during installation and removal of the sealing plug

  1. Future Reactor Experiments

    CERN Document Server

    He, Miao

    2013-01-01

    The measurement of the neutrino mixing angle $\\theta_{13}$ opens a gateway for the next generation experiments to measure the neutrino mass hierarchy and the leptonic CP-violating phase. Future reactor experiments will focus on mass hierarchy determination and the precision measurement of mixing parameters. Mass hierarchy can be determined from the disappearance of reactor electron antineutrinos based on the interference effect of two separated oscillation modes. Relative and absolute measurement techniques have been explored. A proposed experiment JUNO, with a 20 kton liquid scintillator detector of $3%/$$\\sqrt{E(MeV)}$ energy resolution, $\\sim$ 53 km far from reactors of $\\sim$ 36 GW total thermal power, can reach to a sensitivity of $\\Delta\\chi^{2}>16$ considering the spread of reactor cores and uncertainties of the detector response. Three of mixing parameters are expected to be measured to better than 1% precision. There are multiple detector options for JUNO under investigation. The technical challenges...

  2. Reactor hot spot analysis

    Energy Technology Data Exchange (ETDEWEB)

    Vilim, R.B.

    1985-08-01

    The principle methods for performing reactor hot spot analysis are reviewed and examined for potential use in the Applied Physics Division. The semistatistical horizontal method is recommended for future work and is now available as an option in the SE2-ANL core thermal hydraulic code. The semistatistical horizontal method is applied to a small LMR to illustrate the calculation of cladding midwall and fuel centerline hot spot temperatures. The example includes a listing of uncertainties, estimates for their magnitudes, computation of hot spot subfactor values and calculation of two sigma temperatures. A review of the uncertainties that affect liquid metal fast reactors is also presented. It was found that hot spot subfactor magnitudes are strongly dependent on the reactor design and therefore reactor specific details must be carefully studied. 13 refs., 1 fig., 5 tabs.

  3. Reactor BR2. Introduction

    International Nuclear Information System (INIS)

    The BR2 is a materials testing reactor and is still one of SCK-CEN's important nuclear facilities. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. During the last three years, the availability of the installation was maintained at an average level of 97.6 percent. In the year 2000, the reactor was operated for a total of 104 days at a mean power of 56 MW. In 2000, most irradiation experiments were performed in the CALLISTO PWR loop. The report describes irradiations achieved or under preparation in 2000, including the development of advanced facilities and concept studies for new programmes. An overview of the scientific irradiation programmes as well as of the R and D programme of the BR2 reactor in 2000 is given

  4. Research Reactor Benchmarks

    International Nuclear Information System (INIS)

    A criticality benchmark experiment performed at the Jozef Stefan Institute TRIGA Mark II research reactor is described. This experiment and its evaluation are given as examples of benchmark experiments at research reactors. For this reason the differences and possible problems compared to other benchmark experiments are particularly emphasized. General guidelines for performing criticality benchmarks in research reactors are given. The criticality benchmark experiment was performed in a normal operating reactor core using commercially available fresh 20% enriched fuel elements containing 12 wt% uranium in uranium-zirconium hydride fuel material. Experimental conditions to minimize experimental errors and to enhance computer modeling accuracy are described. Uncertainties in multiplication factor due to fuel composition and geometry data are analyzed by sensitivity analysis. The simplifications in the benchmark model compared to the actual geometry are evaluated. Sample benchmark calculations with the MCNP and KENO Monte Carlo codes are given

  5. Nuclear reactor (1960)

    International Nuclear Information System (INIS)

    The first French plutonium-making reactors G1, G2 and G3 built at Marcoule research center are linked to a power plant. The G1 electrical output does not offset the energy needed for operating this reactor. On the contrary, reactors G2 and G3 will each generate a net power of 25 to 30 MW, which will go into the EDF grid. This power is relatively small, but the information obtained from operation is great and will be helpful for starting up the power reactor EDF1, EDF2 and EDF3. The paper describes how, previous to any starting-up operation, the tests performed, especially those concerned with the power plant and the pressure vessel, have helped to bring the commissioning date closer. (author)

  6. Reactor Neutrino Spectra

    CERN Document Server

    Hayes, A C

    2016-01-01

    We present a review of the antineutrino spectra emitted from reactors. Knowledge of these and their associated uncertainties are crucial for neutrino oscillation studies. The spectra used to-date have been determined by either conversion of measured electron spectra to antineutrino spectra or by summing over all of the thousands of transitions that makeup the spectra using modern databases as input. The uncertainties in the subdominant corrections to beta-decay plague both methods, and we provide estimates of these uncertainties. Improving on current knowledge of the antineutrino spectra from reactors will require new experiments. Such experiments would also address the so-called reactor neutrino anomaly and the possible origin of the shoulder observed in the antineutrino spectra measured in recent high-statistics reactor neutrino experiments.

  7. Pulsed fusion reactors

    International Nuclear Information System (INIS)

    This summer school specialized in examining specific fusion center systems. Papers on scientific feasibility are first presented: confinement of high-beta plasma, liners, plasma focus, compression and heating and the use of high power electron beams for thermonuclear reactors. As for technological feasibility, lectures were on the theta-pinch toroidal reactors, toroidal diffuse pinch, electrical engineering problems in pulsed magnetically confined reactors, neutral gas layer for heat removal, the conceptual design of a series of laser fusion power plants with ''Saturn'', implosion experiments and the problem of the targets, the high brightness lasers for plasma generation, and topping and bottoming cycles. Some problems common to pulsed reactors were examined: energy storage and transfer, thermomechanical and erosion effects in the first wall and blanket, the problems of tritium production, radiation damage and neutron activation in blankets, and the magnetic and inertial confinement

  8. Reactor fueling of BWR type reactors

    International Nuclear Information System (INIS)

    Purpose: To enable the pattern exchange for control rods during burning in Control Cell Core type BWR reactors. Constitution: A plurality of control cells are divided into a plurality of groups such that the control cells is aparted from each other by way of at least two fuel assemblies other than the control cells with respect to the vertical and lateral directions of the reactor core cross section, as well as they are in adjacent with control cells of other groups with respect to the orthogonal direction. This enables to perform the pattern exchange for the control rods during burning in the control cell core with ease, and the control blade and the story effect harmful to the mechanical soundness of fuels can thus be suppressed. (Moriyama, K.)

  9. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities in fiscal 1974 in Reactor Engineering Division of eight laboratories and computing center are described. Works in the division are closely related with the development of a multi-purpose High-temperature Gas Cooled Reactor, the development of a Liquid Metal Fast Breeder Reactor in Power Reactor and Nuclear Fuel Development Corporation, and engineering of thermonuclear fusion reactors. They cover nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, heat transfer and fluid dynamics, reactor and nuclear instrumentation, dynamics analysis and control method development, fusion reactor technology and aspects of the computing center. (auth.)

  10. Special lecture on nuclear reactor

    International Nuclear Information System (INIS)

    This book gives a special lecture on nuclear reactor, which is divided into two parts. The first part has explanation on nuclear design of nuclear reactor and analysis of core with theories of integral transports, diffusion Nodal, transports Nodal and Monte Carlo skill parallel computer and nuclear calculation and speciality of transmutation reactor. The second part deals with speciality of nuclear reactor and control with nonlinear stabilization of nuclear reactor, nonlinear control of nuclear reactor, neural network and control of nuclear reactor, control theory of observer and analysis method of Adomian.

  11. The replacement research reactor

    International Nuclear Information System (INIS)

    The contract for the design, construction and commissioning of the Replacement Research Reactor was signed in July 2000. This was followed by the completion of the detailed design and an application for a construction licence was made in May 2001. This paper will describe the main elements of the design and their relation to the proposed applications of the reactor. The future stages in the project leading to full operation are also described

  12. OECD Halden reactor project

    International Nuclear Information System (INIS)

    This report summarizes the activities of the OECD Halden Reactor Project for the year 1976. The main items reported on are: a) the process supervision and control which have focused on core monitoring and control, and operator-process communication; b) the fuel performance and safety behavior which have provided data and analytical descriptions of the thermal, mechanical and chemical behavior of fuel under various operating conditions; c) the reactor operations and d) the administration and finance

  13. Nuclear reactor fuel elements

    International Nuclear Information System (INIS)

    A nuclear reactor fuel element comprising a column of vibration compacted fuel which is retained in consolidated condition by a thimble shaped plug. The plug is wedged into gripping engagement with the wall of the sheath by a wedge. The wedge material has a lower coefficient of expansion than the sheath material so that at reactor operating temperature the retainer can relax sufficient to accommodate thermal expansion of the column of fuel. (author)

  14. Small reactor return

    International Nuclear Information System (INIS)

    Current state of the development of present-day small reactors in different countries is performed. Various designs of low and middle power reactors, among which are CAREM (25 MW, PWR), KLT-40 (40 MW, PWR), MRX (30 MW, PWR), IRIS (50 MW, PWR), SMART (1000 MW, PWR), Modular SBWR (50 MW, BWR), PBMR (120 MW, HTGR), GT-HMR (285 MW, HTGR), are discussed

  15. Reactor lattice transport calculations

    International Nuclear Information System (INIS)

    The present lecture is a continuation of the lecture on Introduction to the Neutron Transport Phenomena. It comprises three aspects of lattice calculations. First the idea of a reactor lattice is introduced. Then the main definitions used in reactor lattice analysis are given, and finally two basic methods applied for solution of the transport equations are defined. Several remarks on secondary results from lattice transport calculations are added. (author)

  16. Thermal or epithermal reactor

    International Nuclear Information System (INIS)

    In a thermal or epithermal heavy-water reactor of the pressure tube design the reactivity is to be increased by different means: replacement of the moderator by additional rods with heavy metal in the core or in the reflector; separation of the moderator (heavy water) from the coolant (light water) by means of shroud tubes. In light-water reactor types neutron losses are to be influenced by using the heavy elements in different configurations. (orig./PW)

  17. Future reactor experiments

    International Nuclear Information System (INIS)

    The non-zero neutrino mixing angle θ13 has been discovered and precisely measured by the current generation short-baseline reactor neutrino experiments. It opens the gate of measuring the leptonic CP-violating phase and enables the neutrino mass ordering. The JUNO and RENO-50 proposals aim at resolving the neutrino mass ordering using reactors. The experiment design, physics sensitivity, technical challenges as well as the progresses of those two proposed experiments are reviewed in this paper

  18. Water cooled nuclear reactor

    International Nuclear Information System (INIS)

    The description is given of a water cooled nuclear reactor comprising a core, cooling water that rises through the core, vertical guide tubes located inside the core and control rods vertically mobile in the guide tubes. In this reactor the cooling water is divided into a first part introduced at the bottom end of the core and rising through it and a second part introduced at the top end of the guide tubes so as to drop in them

  19. Jet-Stirred Reactors

    OpenAIRE

    Herbinet, Olivier; Guillaume, Dayma

    2013-01-01

    The jet-stirred reactor is a type of ideal continuously stirred-tank reactor which is well suited for gas phase kinetic studies. It is mainly used to study the oxidation and the pyrolysis of hydrocarbon and oxygenated fuels. These studies consist in recording the evolution of the conversion of the reactants and of the mole fractions of reaction products as a function of different parameters such as reaction temperature, residence time, pressure and composition of the inlet gas. Gas chromatogr...

  20. Generation IV reactors: economics

    International Nuclear Information System (INIS)

    The operating nuclear reactors were built over a short period: no more than 10 years and today their average age rounds 18 years. EDF (French electricity company) plans to renew its reactor park over a far longer period : 30 years from 2020 to 2050. According to EDF this objective implies 3 constraints: 1) a service life of 50 to 60 years for a significant part of the present operating reactors, 2) to be ready to built a generation 3+ unit in 2020 which infers the third constraint: 3) to launch the construction of an EPR (European pressurized reactor) prototype as soon as possible in order to have it operating in 2010. In this scheme, generation 4 reactor will benefit the feedback experience of generation 3 and will take over in 2030. Economic analysis is an important tool that has been used by the generation 4 international forum to select the likely future reactor systems. This analysis is based on 4 independent criteria: the basic construction cost, the construction time, the operation and maintenance costs and the fuel cycle cost. This analysis leads to the evaluation of the global cost of electricity generation and of the total investment required for each of the reactor system. The former defines the economic competitiveness in a de-regulated energy market while the latter is linked to the financial risk taken by the investor. It appears, within the limits of the assumptions and models used, that generation 4 reactors will be characterized by a better competitiveness and an equivalent financial risk when compared with the previous generation. (A.C.)

  1. Future reactor experiments

    Science.gov (United States)

    Wen, Liangjian

    2015-07-01

    The non-zero neutrino mixing angle θ13 has been discovered and precisely measured by the current generation short-baseline reactor neutrino experiments. It opens the gate of measuring the leptonic CP-violating phase and enables the neutrino mass ordering. The JUNO and RENO-50 proposals aim at resolving the neutrino mass ordering using reactors. The experiment design, physics sensitivity, technical challenges as well as the progresses of those two proposed experiments are reviewed in this paper.

  2. Department of Reactor Technology

    DEFF Research Database (Denmark)

    Risø National Laboratory, Roskilde

    The general development of the Department of Reactor Technology at Risø during 1981 is presented, and the activities within the major subject fields are described in some detail. Lists of staff, publications, and computer programs are included.......The general development of the Department of Reactor Technology at Risø during 1981 is presented, and the activities within the major subject fields are described in some detail. Lists of staff, publications, and computer programs are included....

  3. AVR reactor physics

    International Nuclear Information System (INIS)

    A process for reactivity control was developed and used for fuelling the AVR reactor core, which is largely based on experimentally determined values. By adding fuel elements with different quantities of heavy metals paired with various experimental requirements, great demands were made of reactivity control. Although only a small range of control was available, this was sufficient to operate the reactor and to shut it down safely in the required power and temperature range. (orig.)

  4. Moon base reactor system

    Science.gov (United States)

    Chavez, H.; Flores, J.; Nguyen, M.; Carsen, K.

    1989-01-01

    The objective of our reactor design is to supply a lunar-based research facility with 20 MW(e). The fundamental layout of this lunar-based system includes the reactor, power conversion devices, and a radiator. The additional aim of this reactor is a longevity of 12 to 15 years. The reactor is a liquid metal fast breeder that has a breeding ratio very close to 1.0. The geometry of the core is cylindrical. The metallic fuel rods are of beryllium oxide enriched with varying degrees of uranium, with a beryllium core reflector. The liquid metal coolant chosen was natural lithium. After the liquid metal coolant leaves the reactor, it goes directly into the power conversion devices. The power conversion devices are Stirling engines. The heated coolant acts as a hot reservoir to the device. It then enters the radiator to be cooled and reenters the Stirling engine acting as a cold reservoir. The engines' operating fluid is helium, a highly conductive gas. These Stirling engines are hermetically sealed. Although natural lithium produces a lower breeding ratio, it does have a larger temperature range than sodium. It is also corrosive to steel. This is why the container material must be carefully chosen. One option is to use an expensive alloy of cerbium and zirconium. The radiator must be made of a highly conductive material whose melting point temperature is not exceeded in the reactor and whose structural strength can withstand meteor showers.

  5. BWR type nuclear reactor

    International Nuclear Information System (INIS)

    Purpose: To simplify the structure of an emergency core cooling system while suppressing the flow out of coolants upon rapture accidents in a coolant recycling device of BWR type reactors. Constitution: Recirculation pumps are located at a position higher than the reactor core in a pressure vessel, and the lower plenum is bisected vertically by a partition plate. Further, a gas-liquid separator is surrounded with a wall and the water level at the outer side of the wall is made higher than the water level in the inside of the wall. In this structure, coolants are introduced from the upper chamber in the lower plenum into the reactor core, and the steams generated in the reactor core are separated in the gas-liquid separator, whereby the separated liquid is introduced as coolants by way of the inner chamber into the lower chamber of the lower plenum and further sent by way of the outer chamber into the reactor core. Consequently, idle rotation of the recycling pumps due to the flow-in of saturated water is prevented and loss of coolants in the reactor core can also be prevented upon raptures in the pipeway and the driving section of the pump connected to the pressure vessel and in the bottom of the pressure vessel. (Horiuchi, T.)

  6. Emergency reactor scram system

    International Nuclear Information System (INIS)

    The present invention provides an emergency reactor scram system capable of shut down a reactor safely upon occurrence of pump trip by improving a passive scram performance for an FBR-type reactor. Namely, a driving motor and an electric generator are connected to a main pump of a primary system. An AC/DC convertor is connected to the electric generator. A shielding plug is disposed to the upper end opening of a reactor container, a control rod drive mechanism is erected on the shielding plug, and an extension pipe is attached to scram magnets of the control rod drive mechanism. The extension pipe is connected to a control rod. The rotation of the shaft of the pump is used as a direct rotator to provide an integrated-type electric generator. The electric generator is electrically connected with the power source of a scram magnet of the emergency scram system. Accordingly, the control rod of the emergency scram system is automatically and rapidly inserted to the reactor core using the power source of the electric generator upon trip of the main pump thereby enabling to scram the reactor safely. (I.S.)

  7. A modular reactor plant

    International Nuclear Information System (INIS)

    This paper describes a new concept in liquid metal reactors that is being developed by General Electric under contract to the Department of Energy. This concept is called the Modular Reactor Plant. While this effort is not expected to have a near-term impact, it is directed toward three principal issues currently affecting nuclear power in the United States. First, plant costs have escalated to the point where the startup of new plants require large electric rate increases. Second, the cost of new plants coming on-line today vary by as much as a factor of three. And, third, nuclear construction times often exceed the utilities prudent planning cycle. This paper describes how General Electric's Modular Reactor Plant addreses these issues through shop fabrication and assembly, rail shipment to the site for rapid installation of nuclear components and inherent reactor protection. In addition, it is expected the modular reactor plant will reduce the current cost of development and demonstration of liquid metal reactors to an affordable level

  8. New fission reactor designs

    International Nuclear Information System (INIS)

    A number of critical challenges to the expanded or continued use of nuclear power have developed. These can be categorized as: regulatory restrictions and complications; negative public attitudes; plant complexity; plant life, operations, and maintenance; uncertain load growth, financing; waste management. Solutions to these challenges through advanced reactor design centre around four key technical responses. Passive safety systems are being introduced which use the laws of physics to provide emergency reactor coding, control and shutdown thus eliminating the possibility of human error. Modular construction promises cuts in costs and construction time by shifting the major part of component manufacture from the site to the factory. Standardization also cuts capital costs and in addition operations and repair costs and expedites reactor licensing. Improvements to the fuel cycle include improved fuel types, designs and fabrication, and the reprocessing of and recycling spent fuel back into energy production, thus extending uranium resources and offering a partial solution to the problem of waste disposal. Examples of evolutionary and advanced water-cooled reactors, modular high temperature gas-cooled reactors, and advanced liquid metal cooled fast breeder reactors which are being developed round the world are presented. (author)

  9. OECD Halden reactor project

    International Nuclear Information System (INIS)

    This is the nineteenth annual Report on the OECD Halden Reactor Project, describing activities at the Project during 1978, the last year of the 1976-1978 Halden Agreement. Work continued in two main fields: test fuel irradiation and fuel research, and computer-based process supervision and control. Project research on water reactor fuel focusses on various aspects of fuel behavior under normal, and off-normal transient conditions. In 1978, participating organisations continued to submit test fuel for irradiation in the Halden boiling heavy-water reactor, in instrumented test assemblies designed and manufactured by the Project. Work included analysis of the impact of fuel design and reactor operating conditions on fuel cladding behavior. Fuel performance modelling included characterization of thermal and mechanical behavior at high burn-up, of fuel failure modes, and improvement of data qualification procedures to reduce and quantify error bands on in-reactor measurements. Instrument development yielded new or improved designs for measuring rod temperature, internal pressure, axial neutron flux shape determination, and for detecting cladding defects. Work on computer-based methods of reactor supervision and control included continued development of a system for predictive core surveillance, and of special mathematical methods for core power distribution control

  10. Reactor power measuring device

    International Nuclear Information System (INIS)

    The device of the present invention efficiently calibrates a fixed type gamma ray thermometer of a reactor power measuring device of a BWR type reactor. Namely, the device of the present invention calculates peripheral fuel rod power distribution by calibrating the reactor power distribution by heat generation amount, the reactor power distribution being obtained by a calculation based on a reactor model for converting the signals of a plurality of the gamma ray thermometers in the reactor core based on a conversion formula. In this case, the conversion formula is a relational formula between the power of a thermocouple of the gamma ray thermometer, gamma ray heat generation amount, thermocouple zero power sensitivity relative to a temperature coefficient. A conversion efficient calculation means makes a calibration heater to generate heat at a predetermined power, and the thermocouple zero power sensitivity and the temperature coefficient are obtained based on the output of the gamma ray thermometer in this case. The calibration means updates to conversion type thermocouple zero power sensitivity and temperature coefficient. A calibration execution means executes the operations described above successively, and when the thermocouple zero power sensitivity and the temperature coefficient are out of an allowable range, the means informs it and eliminates the corresponding gamma ray thermometer from the measuring meters. (I.S.)

  11. Reactor safety engineering

    International Nuclear Information System (INIS)

    The concept of the work is such that the basic safety philosophy for nuclear power plants as well as the safety features of both types of light water reactors, pressurized and boiling water reactors, and of the fast breeder reactor are dealt with. With the pressurized and boiling water reactors also variations, due to different supplies are mentioned. The state of development considered is characterized by the results of the American reactor safety study having very much influenced the way of presentation and the validity of the information contained. In the introduction the attentive reader is made familiar with the basic traits of safety engineering, the traditional deterministic way of proceeding being supplemented by a detailed illustration of probabilistic means used in the safety analysis. Added to this are comparative descriptions of the individual safety features, their design and mode of operation. There are, e.g., detailed discussion of the emergency core cooling systems, the power supply systems, the reactor protection system, and the containment. Special chapters are attributed to transients with and without the fast shutdown system working and to loss of coolant. The so-called external events are treated somewhat shortly whereas much space is given to core melting problems. The treatment of important events from the safety point of view, including the section on Harrisburg added for reasons of immediate interest, is limited to phenomenological description. (orig.)

  12. Regulations for RA reactor operation

    International Nuclear Information System (INIS)

    Regulations for RA reactor operation are written in accordance with the legal regulations defined by the Law about radiation protection and related legal acts, as well as technical standards according to the IAEA recommendations. The contents of this book include: fundamental data about the reactor; legal regulations for reactor operation; organizational scheme for reactor operation; general and detailed instructions for operation, behaviour in the reactor building, performing experiments; operating rules for operation under steady state and accidental conditions

  13. A Community in Life and Death: The Late Neolithic Megalithic Tomb at Alto de Reinoso (Burgos, Spain).

    Science.gov (United States)

    Alt, Kurt W; Zesch, Stephanie; Garrido-Pena, Rafael; Knipper, Corina; Szécsényi-Nagy, Anna; Roth, Christina; Tejedor-Rodríguez, Cristina; Held, Petra; García-Martínez-de-Lagrán, Íñigo; Navitainuck, Denise; Arcusa Magallón, Héctor; Rojo-Guerra, Manuel A

    2016-01-01

    The analysis of the human remains from the megalithic tomb at Alto de Reinoso represents the widest integrative study of a Neolithic collective burial in Spain. Combining archaeology, osteology, molecular genetics and stable isotope analysis (87Sr/86Sr, δ15N, δ13C) it provides a wealth of information on the minimum number of individuals, age, sex, body height, pathologies, mitochondrial DNA profiles, kinship relations, mobility, and diet. The grave was in use for approximately one hundred years around 3700 cal BC, thus dating from the Late Neolithic of the Iberian chronology. At the bottom of the collective tomb, six complete and six partial skeletons lay in anatomically correct positions. Above them, further bodies represented a subsequent and different use of the tomb, with almost all of the skeletons exhibiting signs of manipulation such as missing skeletal parts, especially skulls. The megalithic monument comprised at least 47 individuals, including males, females, and subadults, although children aged 0-6 years were underrepresented. The skeletal remains exhibited a moderate number of pathologies, such as degenerative joint diseases, healed fractures, cranial trauma, and a low intensity of caries. The mitochondrial DNA profiles revealed a pattern pointing to a closely related local community with matrilineal kinship patterns. In some cases adjacent individuals in the bottom layer showed familial relationships. According to their strontium isotope ratios, only a few individuals were likely to have spent their early childhood in a different geological environment, whilst the majority of individuals grew up locally. Carbon and nitrogen isotope analysis, which was undertaken to reconstruct the dietary habits, indicated that this was a homogeneous group with egalitarian access to food. Cereals and small ruminants were the principal sources of nutrition. These data fit in well with a lifestyle typical of sedentary farming populations in the Spanish Meseta during

  14. A Community in Life and Death: The Late Neolithic Megalithic Tomb at Alto de Reinoso (Burgos, Spain.

    Directory of Open Access Journals (Sweden)

    Kurt W Alt

    Full Text Available The analysis of the human remains from the megalithic tomb at Alto de Reinoso represents the widest integrative study of a Neolithic collective burial in Spain. Combining archaeology, osteology, molecular genetics and stable isotope analysis (87Sr/86Sr, δ15N, δ13C it provides a wealth of information on the minimum number of individuals, age, sex, body height, pathologies, mitochondrial DNA profiles, kinship relations, mobility, and diet. The grave was in use for approximately one hundred years around 3700 cal BC, thus dating from the Late Neolithic of the Iberian chronology. At the bottom of the collective tomb, six complete and six partial skeletons lay in anatomically correct positions. Above them, further bodies represented a subsequent and different use of the tomb, with almost all of the skeletons exhibiting signs of manipulation such as missing skeletal parts, especially skulls. The megalithic monument comprised at least 47 individuals, including males, females, and subadults, although children aged 0-6 years were underrepresented. The skeletal remains exhibited a moderate number of pathologies, such as degenerative joint diseases, healed fractures, cranial trauma, and a low intensity of caries. The mitochondrial DNA profiles revealed a pattern pointing to a closely related local community with matrilineal kinship patterns. In some cases adjacent individuals in the bottom layer showed familial relationships. According to their strontium isotope ratios, only a few individuals were likely to have spent their early childhood in a different geological environment, whilst the majority of individuals grew up locally. Carbon and nitrogen isotope analysis, which was undertaken to reconstruct the dietary habits, indicated that this was a homogeneous group with egalitarian access to food. Cereals and small ruminants were the principal sources of nutrition. These data fit in well with a lifestyle typical of sedentary farming populations in the

  15. DIETA DE LA NUTRIA NEOTROPICAL Lontra longicaudis (CARNÍVORA, MUSTELIDAE EN EL RÍO ROBLE, ALTO CAUCA, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Botero-Botero Alvaro

    2010-04-01

    Full Text Available Se estudio la dieta de la nutria neotropical en el río Roble, sistema del río La Vieja, alto Cauca, Colombia. Desde agosto de 2006 hasta marzo de 2007 dos veces por mes fueron colectadas heces de la nutria en bolsas plásticas en la zona baja del río Roble, en laboratorio las muestras fueron lavadas, tamizadas y comparadas con una colección de referencia.Se reconocieron 14 categorías alimenticias, dentro los cuales los peces de la Familia Loricariidae, presentaron el mayor porcentaje de frecuencia, particularmente la especie Chetostoma sp. (22,6%, seguida de Hypostomus sp.  (9,55% y  Ancistrus sp.  (8,54%;  otras especies de peces aprovechadas por la nutria en menor proporción son: Apteronotus sp. (11,6%, Brycon henni  (9,86%, Lebiasina sp. (0,70%, y Rhamdia sp. (9,15%. Los insectos fueron el siguiente grupo en importancia, con la especie Corydalus sp. (9% (Familia Corydalidae, y en menor presencia los reptiles de la Familia Corytophanidae, especie Basiliscus sp. Se encontró diferencias significativa, entre los ítems consumidos por temporada climática (Rs = 0,429; n= 11 p= 0.00001.

  16. Factores asociados a la colonización por Streptococcus del grupo B en mujeres embarazadas de Los Altos, Chiapas

    Directory of Open Access Journals (Sweden)

    Ocampo-Torres Moisés

    2000-01-01

    Full Text Available OBJETIVO: Estimar la prevalencia de colonización por Streptococcus del grupo B (SGB en mujeres embarazadas de Los Altos, Chiapas, y analizar factores asociados a la misma. MATERIAL Y MÉTODOS: Es un estudio transversal realizado de febrero a septiembre de 1999 en tres hospitales públicos de segundo nivel en San Cristóbal de las Casas, Chiapas. A 910 mujeres que acudieron para atención de parto a dichos hospitales, se les tomaron muestras (vaginal y perianal para detección de SGB por cultivo e identificación de grupo y serotipo mediante aglutinación en látex. El análisis de factores asociados a la colonización se realizó medianteji² y modelos log-lineales. RESULTADOS: La colonización por SGB fue de 8.6% (IC 95% 6.8 - 10.5. Las mujeres con mayor probabilidad de colonización fueron las de > o = 5 embarazos, residentes de municipios marginados, de ocupación diferente al hogar y con jefe/jefa de familia agrícola (26.8%, RM= 7.25, IC 95% 1.83 - 28.67. CONCLUSIONES: Es necesario que las acciones para la prevención y control de infección por SGB se dirijan principalmente a la población de mayor riesgo de colonización en el área de estudio, con el fin de disminuir la transmisión perinatal de SGB.

  17. GRUPOS FUNCIONALES DE PLANTAS EN BORDES DE AVANCE CON POTENCIAL PARA LA RESTAURACIÓN DE UN BOSQUE ALTO ANDINO

    Directory of Open Access Journals (Sweden)

    Bonilla Maria Argenis

    2011-04-01

    Full Text Available El estudio de grupos funcionales de plantas es una herramienta útil en la identificación de características ecológicas de importancia en la regeneración de una comunidad. El objetivo de este estudio fue la identificación de grupos funcionales de plantas en bordes de avance de un bosque alto andino y la evaluación de su importancia en el curso de la sucesión secundaria en pastizales abandonados. Con base en levantamientos de vegetación de 10 x 10m y en la revisión de atributos vitales de las especies registradas, se realizó una clasificación multivariante de las especies en grupos emergentes de plantas. Los atributos más importantes para la clasificación de los grupos emergentes fueron el método de dispersión, la formación de un banco de semillas y la presencia de propagación vegetativa y asociada a esta la ramificación basal de tallo. Se definieron tres grupos para las especies de estrato herbáceo y tres para las del estrato arbustivo-arbóreo, los cuales reúnen especies con estrategias morfo-fisiológicas similares. Dentro de los grupos definidos, las especies herbáceas dispersadas por diversos medios abióticos y las especies arbustivas con ramificación basal dispersadas por viento y por aves parecen ser claves en la colonización del terreno dominado por H. lanatus y en la facilitación del establecimiento de especies de bosque secundario.

  18. Plantas hipoglicemiantes utilizadas por comunidades tradicionais na Bacia do Alto Paraguai e Vale do Guaporé, Mato Grosso - Brasil

    Directory of Open Access Journals (Sweden)

    M. Macedo

    2004-01-01

    Full Text Available No Brasil, com inúmeras espécies tropicais, evidencia-se o conhecimento e uso da vegetação medicinal pelas comunidades quilombolas, ribeirinhas, rurais, tradicionais e indígenas, que são praticadas até os dias atuais. O Estado de Mato Grosso pela sua localização no Planalto Central brasileiro possui uma variedade destas comunidades, que utilizam estas plantas medicinais, levando em consideração o conhecimento popular passado de geração em geração. Esta pesquisa visa identificar a forma de coleta e os usos desse grupo vegetal indicados pelos usuários. O estudo foi realizado em 15 comunidades tradicionais (não indígenas na Bacia do Alto Paraguai e 2 (duas no Vale do Guaporé. A coleta de dados deu-se através de líderes comunitários, benzedeiras, parteiras e usuários utilizando o método qualitativo, mediante abordagem qualitativa, com auxílio de entrevistas estruturadas, semi-estruturadas e abertas. Dentre as espécies identificadas 17 estacam-se para o tratamento do Diabetes, dentre elas citam-se: Anacadium humile; Bauhinia glabra; Cecropia pachystachya; Hancornia speciosa; Heteropteris aphrodisiaca; Leonotis nepetifolia; Momordica charantia; Solanum lycocarpum. Registra-se ainda que as partes mais utilizadas desses vegetais são: folhas, casca do caule, raiz, planta toda, brotos, óleos dos frutos e polvilho dos frutos. De acordo com os usuários a maioria das plantas não podem ser colhidas após o nascer do sol e o preparo deve ser feito com folhas secas ou que tenham sido submetidas ao processo de secagem sobre o fogão de lenha ou em local abafado.

  19. Identidad social de un grupo de altos ingresos económicos. Social identity of a group of high income

    Directory of Open Access Journals (Sweden)

    Gabriela Dujarric Bermúdez

    2015-12-01

    Full Text Available La investigación indaga la existencia de una relación entre los ingresos económicos y la identidad, para lo cual se trabajó con un grupo de altos ingresos de la provincia de La Habana. Desde el Enfoque de Identidades Sociales se intenta comprender la configuración subjetiva de este grupo, así como su proyección ante la situación actual del país. Utilizamos un enfoque mixto, procesando la información a partir del Statistical Packetfor Social Sciencies (SPSS y el análisis de contenido. Los resultados obtenidos evidencian que los ingresos modelan una identidad social y constituyen un referente sobre cómo se está moviendo la subjetividad de este grupo social, así como de su proyección ante la situación actual del país. The research investigates the existence of a relationship between economic income and social identity, for which we worked with a group of high incomes in the province of Havana. From the Social Identity Perspective we try to understand the subjectivity of this group and its projection to the current situation. We worked with a mixed methodology and processed the information using the Statistical Packet for Social Sciencies (SPSS and the content analysis. The results show that incomes shape an identity and give some hints about the movement ofthis group social subjectivity, in this period of reforms.

  20. Plantas transgénicas con alto rendimiento en peso seco y almidón cuyos órganos de reserva presentanelevada textura, elevado contenido en almidón y elevado rendimiento en peso seco

    OpenAIRE

    Pozueta Romero, Javier; Alonso Casajús, Nora; Muñoz Pérez, Francisco José; Baroja Fernández, Miren Edurne

    2007-01-01

    Plantas transgénicas con alto rendimiento en peso seco y almidón cuyos órganos de reserva presentan elevada textura, elevado contenido en almidón y elevado rendimiento en peso seco. La presente invención proporciona plantas transgénicas con alto rendimiento en peso seco y almidón cuyos órganos de reserva presentan elevada textura, elevado contenido en almidón y elevado rendimiento en peso seco.

  1. Privatización del agua y racismo ambiental en ciudades segregadas. La empresa Aguas del Illimani en las ciudades de La Paz y El Alto (1997-2005)

    OpenAIRE

    Crespo Flores, Carlos O.

    2009-01-01

    Within the framework of environmental racism in the water sector, the water and sani - tation concession contract in the cities of La Paz and El Alto (Bolivia) to Aguas del Illimani company, filial of Suez Group. Both cities are characterised as racially segregated spaces. The differentiated inclusion service policy of the company to neighbourhoods in La Paz and El Alto, particularly costs of connexion and tariffs, the exclusion of poor aymara zones and the environmental risks and impacts.<...

  2. Structure des noyaux de gallium, de germanium et d'arsenic riches en neutrons autour de N=50 et : développement d'une source d'ionisation laser à ALTO

    OpenAIRE

    Tastet, Benoît

    2011-01-01

    During this thesis, we have studied β decays of gallium's nuclei around N=50 and prepared a laser ionization source at ALTO.The production of exotic isotopes has brought new beam production challenges. The one addressed here relates to the elimination of isobar contaminants that create background for experiments. To address this issue a laser ionization source has been developed at ALTO. Copper has been chosen to be the first element to be ionized for physical interests and to compare the res...

  3. The reactor Cabri

    International Nuclear Information System (INIS)

    It has become necessary to construct in France a reactor which would permit the investigation of the conditions of functioning of future installations, the choice, the testing and the development of safety devices to be adopted. A water reactor of a type corresponding to the latest CEA constructions in the field of laboratory or university reactors was decided upon: it appeared important to be able to evaluate the risks entailed and to study the possibilities of increasing the power, always demanded by the users; on the other hand, it is particularly interesting to clarify the phenomena of power oscillation and the risks of burn out. The work programme for CABRI will be associated with the work carried out on the American Sperts of the same type, during its construction, very useful contacts were made with the American specialists who designed the se reactors. A brief description of the reactor is given in the communication as well as the work programme for the first years with respect to the objectives up to now envisaged. Rough description of the reactor. CABRI is an open core swimming-pool reactor without any lateral protection, housed in a reinforced building with controlled leakage, in the Centre d'Etudes Nucleaires de Cadarache. It lies alone in the middle of an area whose radius is 300 meters long. Control and measurements equipment stand out on the edge of that zone. It consumes MTR fuel elements. The control-safety rods are propelled by compressed air. The maximum flow rate of cooling circuit is 1500 m3/h. Transient measurements are recorded in a RW330 unit. Aims and work programme. CABRI is meant for: - studies on the safety of water reactors - for the definition of the safety margins under working conditions: research of maximum power at which a swimming-pool reactor may operate with respect to a cooling accident, of local boiling effect on the nuclear behaviour of the reactor, performances of the control and safety instruments under exceptional

  4. REACTOR GROUT THERMAL PROPERTIES

    Energy Technology Data Exchange (ETDEWEB)

    Steimke, J.; Qureshi, Z.; Restivo, M.; Guerrero, H.

    2011-01-28

    Savannah River Site has five dormant nuclear production reactors. Long term disposition will require filling some reactor buildings with grout up to ground level. Portland cement based grout will be used to fill the buildings with the exception of some reactor tanks. Some reactor tanks contain significant quantities of aluminum which could react with Portland cement based grout to form hydrogen. Hydrogen production is a safety concern and gas generation could also compromise the structural integrity of the grout pour. Therefore, it was necessary to develop a non-Portland cement grout to fill reactors that contain significant quantities of aluminum. Grouts generate heat when they set, so the potential exists for large temperature increases in a large pour, which could compromise the integrity of the pour. The primary purpose of the testing reported here was to measure heat of hydration, specific heat, thermal conductivity and density of various reactor grouts under consideration so that these properties could be used to model transient heat transfer for different pouring strategies. A secondary purpose was to make qualitative judgments of grout pourability and hardened strength. Some reactor grout formulations were unacceptable because they generated too much heat, or started setting too fast, or required too long to harden or were too weak. The formulation called 102H had the best combination of characteristics. It is a Calcium Alumino-Sulfate grout that contains Ciment Fondu (calcium aluminate cement), Plaster of Paris (calcium sulfate hemihydrate), sand, Class F fly ash, boric acid and small quantities of additives. This composition afforded about ten hours of working time. Heat release began at 12 hours and was complete by 24 hours. The adiabatic temperature rise was 54 C which was within specification. The final product was hard and displayed no visible segregation. The density and maximum particle size were within specification.

  5. Materials for nuclear reactors

    International Nuclear Information System (INIS)

    The improved performance of present generation nuclear reactors and the realization of advanced reactor concepts, both, require development of better materials. Physical metallurgy/materials science principles which have been exploited in meeting the exacting requirements of nuclear reactor materials (fuels and structural materials), are outlined citing a few specific examples. While the incentive for improvement of traditional fuels (e.g., UO2 fuel) is primarily for increasing the average core burn up, the development of advanced fuels (e.g., MOX, mixed carbide, nitride, silicide and dispersion fuels) are directed towards better utilization of fissile and fertile inventories through adaptation of innovative fuel cycles. As the burn up of UO2 fuel reaches higher levels, a more detailed and quantitative understanding of the phenomena such as fission gas release, fuel restructuring induced by radiation and thermal gradients and pellet-clad interaction is being achieved. Development of zirconium based alloys for both cladding and pressure tube applications is discussed with reference to their physical metallurgy, fabrication techniques and in-reactor degradation mechanisms. The issue of radiation embrittlement of reactor pressure vessels (RPVs) is covered drawing a comparison between the western and eastern specifications of RPV steels. The search for new materials which can stand higher rates of atomic displacement due to radiation has led to the development of swelling resistant austenitic and ferritic stainless steels for fast reactor applications as exemplified by the development of the D-9 steel for Indian fast breeder reactor. The presentation will conclude by listing various materials related phenomena, which have a strong bearing on the successful development of future nuclear energy systems. (author)

  6. Reactor physics and economic aspects of the CANDU reactor system

    International Nuclear Information System (INIS)

    A history of the development of the CANDU system is given along with a fairly detailed description of the 600 MW(e) CANDU reactor. Reactor physics calculation methods are described, as well as comparisons between calculated reactor physics parameters and those measured in research and power reactors. An examination of the economics of CANDU in the Ontario Hydro system and a comparison between fossil fuelled and light water reactors is presented. Some physics, economics and resources aspects are given for both low enriched uranium and thorium-fuelled CANDU reactors. Finally the RβD program in Advanced Fuel Cycles is briefly described

  7. Reactor Safety Planning for Prometheus Project, for Naval Reactors Information

    Energy Technology Data Exchange (ETDEWEB)

    P. Delmolino

    2005-05-06

    The purpose of this letter is to submit to Naval Reactors the initial plan for the Prometheus project Reactor Safety work. The Prometheus project is currently developing plans for cold physics experiments and reactor prototype tests. These tests and facilities may require safety analysis and siting support. In addition to the ground facilities, the flight reactor units will require unique analyses to evaluate the risk to the public from normal operations and credible accident conditions. This letter outlines major safety documents that will be submitted with estimated deliverable dates. Included in this planning is the reactor servicing documentation and shipping analysis that will be submitted to Naval Reactors.

  8. Fast breeder reactor research

    International Nuclear Information System (INIS)

    Full text: The meeting was attended by 15 participants from seven countries and two international organizations. The Eighth Annual Meeting of the International Working Group on Fast Reactors (IWGFR) was attended by representatives from France, Fed. Rep. Germany, Italy, Japan, United Kingdom, Union of Soviet Socialist Republics and the United States of America - countries that have made significant progress in developing the technology and physics of sodium cooled fast reactors and have extensive national programmes in this field - as well as by representatives of the Commission of the European Communities and the IAEA. The design of fast-reactor power plants is a more difficult task than developing facilities with thermal reactors. Different reactor kinetics and dynamics, a hard neutron spectrum, larger integral doses of fuel and structural material irradiation, higher core temperatures, the use of an essentially novel coolant, and, as a result of all these factors, the additional reliability and safety requirements that are imposed on the planning and operation of sodium cooled fast reactors - all these factors pose problems that can be solved comprehensively only by countries with a high level of scientific and technical development. The exchange of experience between these countries and their combined efforts in solving the fundamental problems that arise in planning, constructing and operating fast reactors are promoting technical progress and reducing the relative expenditure required for various studies on developing and introducing commercial fast reactors. For this reason, the meeting concentrated on reviewing and discussing national fast reactor programmes. The situation with regard to planning, constructing and operating fast experimental and demonstration reactors in the countries concerned, the experience accumulated in operating them, the difficulties arising during operation and ways of over-coming them, the search for optimal designs for the power

  9. BR2 Reactor: Introduction

    International Nuclear Information System (INIS)

    The irradiations in the BR2 reactor are in collaboration with or at the request of third parties such as the European Commission, the IAEA, research centres and utilities, reactor vendors or fuel manufacturers. The reactor also contributes significantly to the production of radioisotopes for medical and industrial applications, to neutron silicon doping for the semiconductor industry and to scientific irradiations for universities. Along the ongoing programmes on fuel and materials development, several new irradiation devices are in use or in design. Amongst others a loop providing enhanced cooling for novel materials testing reactor fuel, a device for high temperature gas cooled fuel as well as a rig for the irradiation of metallurgical samples in a Pb-Bi environment. A full scale 3-D heterogeneous model of BR2 is available. The model describes the real hyperbolic arrangement of the reactor and includes the detailed 3-D space dependent distribution of the isotopic fuel depletion in the fuel elements. The model is validated on the reactivity measurements of several tens of BR2 operation cycles. The accurate calculations of the axial and radial distributions of the poisoning of the beryllium matrix by 3He, 6Li and 3T are verified on the measured reactivity losses used to predict the reactivity behavior for the coming decades. The model calculates the main functionals in reactor physics like: conventional thermal and equivalent fission neutron fluxes, number of displacements per atom, fission rate, thermal power characteristics as heat flux and linear power density, neutron/gamma heating, determination of the fission energy deposited in fuel plates/rods, neutron multiplication factor and fuel burn-up. For each reactor irradiation project, a detailed geometry model of the experimental device and of its neighborhood is developed. Neutron fluxes are predicted within approximately 10 percent in comparison with the dosimetry measurements. Fission rate, heat flux and

  10. Reactor coolant cleanup facility

    International Nuclear Information System (INIS)

    A depressurization device is disposed in pipelines upstream of recycling pumps of a reactor coolant cleanup facility to reduce a pressure between the pressurization device and the recycling pump at the downstream, thereby enabling high pressure coolant injection from other systems by way of the recycling pumps. Upon emergency, the recycling pumps of the coolant cleanup facility can be used in common to an emergency reactor core cooling facility and a reactor shutdown facility. Since existent pumps of the emergency reactor core cooling facility and the reactor shutdown facility which are usually in a stand-by state can be removed, operation confirmation test and maintenance for equipments in both of facilities can be saved, so that maintenance and reliability of the plant are improved and burdens on operators can also be mitigated. Moreover, low pressure design can be adopted for a non-regenerative heat exchanger and recycling coolant pumps, which enables to improve the reliability and economical property due to reduction of possibility of leakage. (N.H.)

  11. HTGR type reactor

    International Nuclear Information System (INIS)

    A reactor core is disposed at the center of a reactor container, a reflector is disposed on the outer side thereof, a steam generator is disposed further outer side thereof coaxially, and they are constituted as an integrated one container. A gas circulator and control rod drives are protruded at the outer side of the lower portion of the integrated container. Heat insulators are disposed on the inner side of the container wall in the upper portion of the reactor container. Helium gas risen in the reactor core and heated to a high temperature descends in a circular steam generator and undergoes heat exchange with water, and is then pressurized in the gas circulator after the lowering of the temperature, and returned to the inlet of the reactor core from the lower central portion of the container. With such procedures, the helium gas as primary coolants circulates only in the container to improve confinement. The device can be reduced in the size and the cost. (I.N.)

  12. Reactor container spray device

    International Nuclear Information System (INIS)

    Purpose: To enable decrease in the heat and the concentration of radioactive iodine released from the reactor vessel into the reactor container in the spray device of BWR type reactors. Constitution: A plurality of water receiving trays are disposed below the spray nozzle in the dry well and communicated to a pressure suppression chamber by way of drain pipeways passing through a diaphragm floor. When the recycling system is ruptured and coolants in the reactor vessel and radioactive iodine in the reactor core are released into the dry well, spray water is discharged from the spray nozzle to eliminate the heat and the radioactive iodine in the dry well. In this case, the receiving trays collect the portions of spray water whose absorption power for the heat and radioactive iodine is nearly saturated and falls them into the pool water of the pressure suppression chamber. Consequently, other portions of the spray water that still possess absorption power can be jetted with no hindrance, to increase the efficiency for the removal of the heat and iodine of the spray droplets. (Horiuchi, T.)

  13. PROTEUS research reactor

    International Nuclear Information System (INIS)

    The PROTEUS zero power reactor at the Paul Scherrer Institute (PSI) in Switzerland achieved first criticality in 1968 and since then has been operated as an experimental tool for reactor physics research on test lattices representative of a wide range of reactor concepts. Reactor design codes and their associated data libraries are validated on the basis of the experimental results obtained. PROTEUS is normally configured as a driven system, in which a subcritical test zone is made critical by the surrounding driver zones. The advantages of driven systems can be summarized as follows: - Smaller amount of test fuel is required; - Large range of test zone conditions (including k∞ < 1 states) can be investigated by changes in the driver loading alone, thus avoiding undesirable perturbations to the test zone which would influence the measurement conditions and thus affect the interpretability of the results; - Necessary reactor control and instrumentation equipment (usually perturbing from the experimental viewpoint) can be located in the outer driver regions, thereby avoiding disturbance of the test lattice

  14. Generalities about nuclear reactors

    International Nuclear Information System (INIS)

    From Zoe, the first nuclear reactor, till the current EPR, the French nuclear industry has always advanced by profiting from the feedback from dozens of years of experience and operations, in particular by drawing lessons from the most significant events in its history, such as the Fukushima accident. The new generations of reactors must improve safety and economic performance so that the industry maintain its legitimacy and its share in the production of electricity. This article draws the history of nuclear power in France, gives a brief description of the pressurized water reactor design, lists the technical features of the different versions of PWR that operate in France and compares them with other types of reactors. The feedback experience concerning safety, learnt from the major nuclear accidents Three Miles Island (1979), Chernobyl (1986) and Fukushima (2011) is also detailed. Today there are 26 third generation reactors being built in the world: 4 EPR (1 in Finland, 1 in France and 2 in China); 2 VVER-1200 in Russia, 8 AP-1000 (4 in China and 4 in the Usa), 8 APR-1400 (4 in Korea and 4 in UAE), and 4 ABWR (2 in Japan and 2 in Taiwan)

  15. China experimental fast reactor

    International Nuclear Information System (INIS)

    The Chinese experimental fast reactor (CEFR) is a pool-type sodium-cooled fast reactor whose short term purposes are: -) the validation of computer codes, -) the check of the relevance of standards, and -) the gathering of experimental data on fast reactors. On the long term the expectations will focus on: -) gaining experience in fast reactor operations, -) the testing of nuclear fuels and materials, and -) the study of sodium compounds. The main technical features of CEFR are: -) thermal power output: 65 MW (electrical power output: 20 MW), -) size of the core: height: 45 cm, diameter: 60 cm, -) maximal linear output: 430 W/cm, -) neutron flux: 3.7*1015 n/cm2/s, -) input/output sodium temperature: 360 / 530 Celsius degrees, -) 2 loops for the primary system and 2 loops for the secondary system. The temperature coefficient and the power coefficient are settled to stay negative for any change in the values of the core parameters. The installation of the reactor vessel will be completed by mid 2007. The first criticality of CEFR is expected during the first semester of 2010. (A.C.)

  16. EBT reactor analysis

    International Nuclear Information System (INIS)

    This report summarizes the results of a recent ELMO Bumpy Torus (EBT) reactor study that includes ring and core plasma properties with consistent treatment of coupled ring-core stability criteria and power balance requirements. The principal finding is that constraints imposed by these coupling and other physics and technology considerations permit a broad operating window for reactor design optimization. Within this operating window, physics and engineering systems analysis and cost sensitivity studies indicate that reactors with approx. 6 to 10%, P approx. 1200 to 1700 MW(e), wall loading approx. 1.0 to 2.5 MW/m2, and recirculating power fraction (including ring-sustaining power and all other reactors auxiliaries) approx. 10 to 15% are possible. A number of concept improvements are also proposed that are found to offer the potential for further improvement of the reactor size and parameters. These include, but are not limited to, the use of: (1) supplementary coils or noncircular mirror coils to improve magnetic geometry and reduce size, (2) energetic ion rings to improve ring power requirements, (3) positive potential to enhance confinement and reduce size, and (4) profile control to improve stability and overall fusion power density

  17. Modern research reactors in the world and RA research reactor

    International Nuclear Information System (INIS)

    This paper covers the following topics: fundamentals of research reactors, thermal neutron flux density, classification of research reactors in the world, properties of research reactors of higher power in the world according to IAEA data for 1995, their application, and trend of development, experimental feasibility and status of RA reactor. Trend of research reactors development in the world (after 1980) is directed towards increasing the neutron production quality factor, i.e. ratio between thermal neutron flux density and reactor power, which is achieved by designing compact reactor cores. With the aim of renewal of RA reactor (without analysis of reactor components and staff aging, possibility of restart and commercialization), according to the analysis in this paper, it can be concluded: there is very few reactors under construction in the world, all the important countries in Europe have research reactors; RA reactor is not very interesting for development of reactor physics; nowadays RA reactor is in the group of reactors which are 30-40 years old; its inventories of fuel and heavy water are enough for about 20 years of operation; it has achieved high quality factor of neutron production with low and highly enriched fuel; core transfer from low highly enriched to low enriched fuel should be carefully studies from operation, experimental and economical point of view; it is necessary to use the advantages of RA reactor (minimum investment): volume of the core and reflector which enables availability of neutron flux for the users (numerous experimental loops), fuel in shape of slugs enabling efficient fuel management and flexible neutron flux distribution in the core in the reflector, reactor operation should be directed towards commercial applications. Bibliography of more than 140 relevant papers used is included in this paper

  18. Sodium-cooled nuclear reactors

    International Nuclear Information System (INIS)

    This book first explains the choice of sodium-cooled reactors by outlining the reasons of the choice of fast neutron reactors (fast neutrons instead of thermal neutrons, recycling opportunity for plutonium, full use of natural uranium, nuclear waste optimization, flexibility of fast neutron reactors in nuclear material management, fast neutron reactors as complements of water-cooled reactors), and by outlining the reasons for the choice of sodium as heat-transfer material. Physical, chemical, and neutron properties of sodium are presented. The second part of the book first presents the main design principles for sodium-cooled fast neutron reactors and their core. The third part proposes an historical overview and an assessment of previously operated sodium-cooled fast neutron reactors (French reactors from Rapsodie to Superphenix, other reactors in the world), and an assessment of the main incidents which occurred in these reactors. It also reports the experience and lessons learned from the dismantling of various sodium-cooled fast breeder reactors in the world. The next chapter addresses safety issues (technical and safety aspects related to the use of sodium) and environmental issues (dosimetry, gaseous and liquid releases, solid wastes, and cooling water). Then, various technological aspects of these reactors are addressed: the energy conversion system, main components, sodium chemistry, sodium-related technology, advances in in-service inspection, materials used in reactors and their behaviour, and fuel system. The next chapter addresses the fuel cycle in these reactors: its integrated specific character, report of the French experience in fast neutron reactor fuel processing, description of the transmutation of minor actinides in these reactors. The last chapter proposes an overview of reactors currently projected or under construction in the world, presents the Astrid project, and gives an assessment of the economy of these reactors. A glossary and an index

  19. Scaleable, High Efficiency Microchannel Sabatier Reactor Project

    Data.gov (United States)

    National Aeronautics and Space Administration — A Microchannel Sabatier Reactor System (MSRS) consisting of cross connected arrays of isothermal or graded temperature reactors is proposed. The reactor array...

  20. Methanation assembly using multiple reactors

    Science.gov (United States)

    Jahnke, Fred C.; Parab, Sanjay C.

    2007-07-24

    A methanation assembly for use with a water supply and a gas supply containing gas to be methanated in which a reactor assembly has a plurality of methanation reactors each for methanating gas input to the assembly and a gas delivery and cooling assembly adapted to deliver gas from the gas supply to each of said methanation reactors and to combine water from the water supply with the output of each methanation reactor being conveyed to a next methanation reactor and carry the mixture to such next methanation reactor.

  1. Mimic of OSU research reactor

    International Nuclear Information System (INIS)

    The Ohio State University research reactor (OSURR) is undergoing improvements in its research and educational capabilities. A computer-based digital data acquisition system, including a reactor system mimic, will be installed as part of these improvements. The system will monitor the reactor system parameters available to the reactor operator either in digital parameters available to the reactor operator either in digital or analog form. The system includes two computers. All the signals are sent to computer 1, which processes the data and sends the data through a serial port to computer 2 with a video graphics array VGA monitor, which is utilized to display the mimic system of the reactor

  2. MINT research reactor safety program

    Energy Technology Data Exchange (ETDEWEB)

    Mohamad Idris bin Taib [Division of Special Project, Malaysian Institute for Nuclear Technology Research (MINT), Bangi (Malaysia)

    2000-11-01

    Malaysian Institute for Nuclear Technology Research (MINT) Research Reactor Safety Program has been done along with Reactor Power Upgrading Project, Reactor Safety Upgrading Project and Development of Expert System for On-Line Nuclear Process Control Project. From 1993 up to date, Neutronic and Thermal-hydraulics analysis, Probabilistic Safety Assessment as well as installation of New 2 MW Secondary Cooling System were done. Installations of New Reactor Building Ventilation System, Reactor Monitoring System, Updating of Safety Analysis Report and Upgrading Primary Cooling System are in progress. For future activities, Reactor Modeling will be included to add present activities. (author)

  3. RB research reactor Safety Report

    International Nuclear Information System (INIS)

    This RB reactor safety report is a revised and improved version of the Safety report written in 1962. It contains descriptions of: reactor building, reactor hall, control room, laboratories, reactor components, reactor control system, heavy water loop, neutron source, safety system, dosimetry system, alarm system, neutron converter, experimental channels. Safety aspects of the reactor operation include analyses of accident causes, errors during operation, measures for preventing uncontrolled activity changes, analysis of the maximum possible accident in case of different core configurations with natural uranium, slightly and highly enriched fuel; influence of possible seismic events

  4. Fusion reactor materials

    International Nuclear Information System (INIS)

    This is the fifteenth in a series of semiannual technical progress reports on fusion reactor materials. This report combines research and development activities which were previously reported separately in the following progress reports: Alloy Development for Irradiation Performance; Damage Analysis and Fundamental Studies; Special purpose Materials. These activities are concerned principally with the effects of the neutronic and chemical environment on the properties and performance of reactor materials; together they form one element of the overall materials programs being conducted in support of the Magnetic Fusion Energy Program of the U.S. Department of Energy. The Fusion Reactor Materials Program is a national effort involving several national laboratories, universities, and industries. The purpose of this series of reports is to provide a working technical record for the use of the program participants, and to provide a means of communicating the efforts of materials scientists to the rest of the fusion community, both nationally and worldwide

  5. Chernobyl reactor accident

    International Nuclear Information System (INIS)

    On April 26, 1986, an explosion occurred at the newest of four operating nuclear reactors at the Chernobyl site in the USSR. The accident initiated an international technical exchange of almost unprecedented magnitude; this exchange was climaxed with a meeting at the International Atomic Energy Agency in Vienna during the week of August 25, 1986. The meeting was attended by more than 540 official representatives from 51 countries and 20 international organizations. Information gleaned from that technical exchange is presented in this report. A description of the Chernobyl reactor, which differs significantly from commercial US reactors, is presented, the accident scenario advanced by the Russian delegation is discussed, and observations that have been made concerning fission product release are described

  6. International Thermonuclear Experimental Reactor

    International Nuclear Information System (INIS)

    An international design team comprised of members from Canada, Europe, Japan, the Soviet Union, and the United States of America, are designing an experimental fusion test reactor. The engineering and testing objectives of this International Thermonuclear Experimental Reactor (ITER) are to validate the design and to demonstrate controlled ignition, extended burn of a deuterium and tritium plasma, and achieve steady state using technology expected to be available by 1990. The concept maximizes flexibility while allowing for a variety of plasma configurations and operating scenarios. During physics phase operation, the machine produces a 22 MA plasma current. In the technology phase, the machine can be reconfigured with a thicker shield and a breeding blanket to operate with an 18 MA plasma current at a major radius of 5.5 meters. Canada's involvement in the areas of safety, facility design, reactor configuration and maintenance builds on our internationally recognized design and operational expertise in developing tritium processes and CANDU related technologies

  7. Licensed operating reactors

    International Nuclear Information System (INIS)

    The US Nuclear Regulatory Commission's monthly Licensed Operating Reactors Status Summary Report provides data on the operation of nuclear units as timely and accurately as possible. This information is collected by the Office of Information Resources Management, from the Headquarters Staff of NRC's Office of Inspection and Enforcement, from NRC's Regional Offices, and from utilities. This report is divided into three sections: the first contains monthly highlights and statistics for commercial operating units, and errata from previously reported data; the second is a compilation of detailed information on each unit, provided by NRC Regional Offices, IE Headquarters and the Utilities; and the third section is an appendix for miscellaneous information such as spent fuel storage capability, reactor years of experience and non-power reactors in the United States

  8. Licensed operating reactors

    International Nuclear Information System (INIS)

    THE OPERATING UNITS STATUS REPORT - LICENSED OPERATING REACTORS provides data on the operation of nuclear units as timely and accurately as possible. This information is collected by the Office of Information Resources Management from the Headquarters staff of NRC's Office of Enforcement (OE), from NRC's Regional Offices, and from utilities. The three sections of the report are: monthly highlights and statistics for commercial operating units, and errata from previously reported data; a compilation of detailed information on each unit, provided by NRC's Regional Offices, OE Headquarters and the utilities; and an appendix for miscellaneous information such as spent fuel storage capability, reactor-years of experience and non-power reactors in the US

  9. Licensed operating reactors

    International Nuclear Information System (INIS)

    The US Nuclear Regulatory Commission's monthly LICENSED OPERATING REACTORS Status Summary Report provides data on the operation of nuclear units as timely and accurately as possible. This information is collected by the Office of Information Resources Management, from the Headquarters Staff of NRC's Office of Inspection and Enforcement, from NRC's Regional Offices, and from utilities. This report is divided into three sections: the first contains monthly highlights and statistics for commercial operating units, and errata from previously reported data; the second is a compilation of detailed information on each unit, provided by NRC Regional Offices, IE Headquarters and the Utilities; and the third section is an appendix for miscellaneous information such as spent fuel storage capability, reactor years of experience and non-power reactors in the United States

  10. Colliding Beam Fusion Reactors

    Science.gov (United States)

    Rostoker, Norman; Qerushi, Artan; Binderbauer, Michl

    2003-06-01

    The recirculating power for virtually all types of fusion reactors has previously been calculated [1] with the Fokker-Planck equation. The reactors involve non-Maxwellian plasmas. The calculations are generic in that they do not relate to specific confinement devices. In all cases except for a Tokamak with D-T fuel the recirculating power was found to exceed the fusion power by a large factor. In this paper we criticize the generality claimed for this calculation. The ratio of circulating power to fusion power is calculated for the Colliding Beam Reactor with fuels D-T, D-He3 and p-B11. The results are respectively, 0.070, 0.141 and 0.493.

  11. The MNSR reactor

    International Nuclear Information System (INIS)

    This tank-in-pool reactor is based on the same design concept as the Canadian Slowpoke. The core is a right circular cylinder, 24 cm diameter by 25 cm long, containing 411 fuel pin positions. The pins are HEU-Aluminium alloy, 0.5 cm in diameter. Critical mass is about 900 g. The reactor has a single cadmium control rod. The back-up shutdown system is the insertion of a cadmium capsule in a core position. Excess reactivity is limited to 3.5mk. In both the MNSR and Slowpoke, the insertion of the maximum excess reactivity results in a power transient limited by the coolant/moderator temperature to safe values, independent of any operator action. This reactor is used primarily in training and neutron activation analysis. Up to 64 elements have been analyzed in a great variety of different disciplines. (author)

  12. Welding and reactor safety

    International Nuclear Information System (INIS)

    The high safety requirements which must be demanded of the quality of the welded joints in reactor technique have so far not been fulfilled in all cases. The errors occuring have caused considerable loss of availability and high material costs. They were not, however, so serious that one need have feared any immediate danger to the personnel or to the environment. The safety devices of reactor plants were only called upon in a few cases and to these they responded perfectly. The intensive efforts to complete and improve the specifications are to contribute to that in future, the reactor plants can be counted even more so as one of the safest technical plants ever. (orig./LH)

  13. Reactor operation experience

    International Nuclear Information System (INIS)

    Since the TRIGA Users Conference in Helsinki 1970 the TRIGA reactor Vienna was in operation without any larger undesired shutdown. The integrated thermal power production by August 15 1972 accumulated to 110 MWd. The TRIGA reactor is manly used for training of students, for scientific courses and research work. Cooperation with industry increased in the last two years either in form of research or in performing training courses. Close cooperation is also maintained with the IAEA, samples are irradiated and courses on various fields are arranged. Maintenance work was performed on the heat exchanger and to replace the shim rod magnet. With the view on the future power upgrading nine fuel elements type 110 have been ordered recently. Experiments, performed currently on the reactor are presented in details

  14. Nuclear Rocket Engine Reactor

    CERN Document Server

    Lanin, Anatoly

    2013-01-01

    The development of a nuclear rocket engine reactor (NRER ) is presented in this book. The working capacity of an active zone NRER under mechanical and thermal load, intensive neutron fluxes, high energy generation (up to 30 MBT/l) in a working medium (hydrogen) at temperatures up to 3100 K is displayed. Design principles and bearing capacity of reactors area discussed on the basis of simulation experiments and test data of a prototype reactor. Property data of dense constructional, porous thermal insulating and fuel materials like carbide and uranium carbide compounds in the temperatures interval 300 - 3000 K are presented. Technological aspects of strength and thermal strength resistance of materials are considered. The design procedure of possible emergency processes in the NRER is developed and risks for their origination are evaluated. Prospects of the NRER development for pilotless space devices and piloted interplanetary ships are viewed.

  15. Reactor accidents in perspective

    International Nuclear Information System (INIS)

    In each of the three major reactor accidents which have led to significant releases to the environment, and discussed in outline in this note, the reactor has been essentially destroyed - certainly Windscale and Chernobyl reactors will never operate and the cleanup operation for Three Mile Island is currently estimated to have cost in excess of US Pound 500 000 000. In each of the accidents there has not been any fatality off site in the short term and any long-term health detriment is unlikely to be seen in comparison with the natural cancer incidence rate. At Chernobyl, early fatalities did occur amongst those concerned with fighting the incident on site and late effects are to be expected. The assumption of a linear non-threshold risk, and hence no level of zero risk is the main problem in communication with the public, and the author calls for simplification of the presentation of the concepts of radiological protection. (U.K.)

  16. Reactor safety equipments

    International Nuclear Information System (INIS)

    Purpose: To positively recover radioactive substances discharged in a dry well at the time of failure of a reactor. Constitution: In addition to the emergency gas treating system fitted to a reactor building, a purification system connected through a pipeline to the dry well is arranged in the reactor building. This purification system is connected through pipes fitted to the dry well to forced circulation device, heat exchanger, and purification device. The atmosphere of high pressure steam gases in the dry well is derived to the heat exchanger for cooling, and then radioactive substances which are contained in the gases are removed by filter sets charged with the HEPA filters and the HECA filters. At last, there gases are returned to dry well by circulation pump, repeat this process. (Kamimura, M.)

  17. Licensed operating reactors

    International Nuclear Information System (INIS)

    The US Nuclear Regulatory Commission's monthly LICENSED OPERATING REACTORS Status Summary Report provides data on the operation of nuclear units as timely and accurately as possible. This information is collected by the Office of Information Resources Management, from the Headquarters Staff of NRC's Office of Inspection and Enforcement, from NRC's Regional Offices, and from utilities. This report is divided into three sections: the first contains monthly highlights and statistics for commercial operating units, and errata from previously reported data; the second is a compilation of detailed information on each unit, provided by NRC Regional Offices, IE Headquarters and the utilities; and the third section is an appendix for miscellaneous information such as spent fuel storage capability, reactor years of experience and non-power reactors in the United States

  18. Reactor protection system

    International Nuclear Information System (INIS)

    The report describes the reactor protection system (RPS-II) designed for use on Babcock and Wilcox 145-, later 177-, and 205-fuel assembly pressurized water reactors. In this system, relays in the trip logic have been replaced by solid state devices. A calculating module for the low DNBR, pump status, and offset trip functions has replaced the overpower trip (based on flow and imbalance), the power/RC pump trip, and the variable low-pressure trip. Included is a description of the changes from the present Oconee-type reactor protection system (RPS-I), a functional and hardware description of the calculating module, a description of the software programmed in the calculating module, and a discussion of the qualification program conducted to ensure that the degree of protection provided by RPS-II is not less than that provided by previously licensed systems supplied by B and W

  19. Backfitting swimming pool reactors

    International Nuclear Information System (INIS)

    Calculations based on measurements in a critical assembly, and experiments to disclose fuel element surface temperatures in case of accidents like stopping of primary coolant flow during full power operation, have shown that the power of the swimming pool type research reactor FRG-2 (15 MW, operating since 1967) might be raised to 21 MW within the present rules of science and technology, without major alterations of the pool buildings and the cooling systems. A backfitting program is carried through to adjust the reactor control systems of FRG-2 and FRG-1 (5 MW, housed in the same reactor hall) to the present safety rules and recommendations, to ensure FRG-2 operation at 21 MW for the next decade. (author)

  20. MERCHANT MARINE SHIP REACTOR

    Science.gov (United States)

    Mumm, J.F.; North, D.C. Jr.; Rock, H.R.; Geston, D.K.

    1961-05-01

    A nuclear reactor is described for use in a merchant marine ship. The reactor is of pressurized light water cooled and moderated design in which three passes of the water through the core in successive regions of low, intermediate, and high heat generation and downflow in a fuel region are made. The foregoing design makes a compact reactor construction with extended core life. The core has an egg-crate lattice containing the fuel elements confined between a lower flow baffle and upper grid plate, with the latter serving also as part of a turn- around manifold from which the entire coolant is distributed into the outer fuel elements for the second pass through the core. The inner fuel elements are cooled in the third pass.