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Sample records for central termoelectrica ramon

  1. Atmospheric emissions control at ENELVEN`s Ramon Laguna thermal power plant; Control de emisiones a la atmosfera en la central termoelectrica Ramon Laguna de ENELVEN

    Energy Technology Data Exchange (ETDEWEB)

    Rincon Rincon, Edis Rafael [Empresa de Servicio Electrico (ENELVEN), (Venezuela)

    1996-12-31

    ENELVEN is an electric utility that covers the areas of generation, transmission and distribution of the Western an South coast of the Maracaibo Lake of the Zulia State, Venezuela. General aspects of the Ramon Laguna of ENELVEN fossil power plant are presented, as well as the environmental measures implanted in this power station to avoid detrimental effects on the environment that could be caused by the emission of combustion products without the appropriate control, such as particulate matter, sulfur oxides, nitrogen oxides and carbon oxides [Espanol] ENELVEN es una empresa de servicio electrico que cubre las areas de generacion, transmision y distribucion de la Costa Occidental y Sur del Lago de Maracaibo, del Estado Zulia, Venezuela. Se presentan aspectos generales de la planta termoelectrica Ramon Laguna de la empresa ENELVEN, asi como las medidas ambientales implantadas en esta central para evitar efectos adversos sobre el ambiente que pudieran producirse por la emision de productos de la combustion si no existiera el debido control, tales como: particulas, oxidos de azufre, oxidos de nitrogeno y oxidos de carbono

  2. Integral power evaluation in fossil fuel power plants; Evaluacion energetica integral en unidades de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Figueroa I, Luis R; Sanchez H, Laura E; Rodriguez M, Jose H [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Nebradt G, Jesus [Unidad de Investigacion y Desarrollo de la Subdireccion de Generacion de la Comision Federal de Electricidad, (Mexico)

    2006-07-01

    In this occasion, a methodology is presented that carries out an integral energy evaluation of fossil fuel power plants units (FFPPU) with the purpose of determining the root of the significant decrements of power produced soon after the annual maintenance service. This proposal, besides identifying the origin of the energy efficiency problems, offers information about the contributions of each one of the involved equipment in the total decrement of the unit. With this methodology, the maintenance focuses in the equipment that contributes to the greater energy loss. This document presents such methodology along with its application in a real case, results and necessary remedial actions, demonstrating that its application offers bases for the investment in corrective measures. [Spanish] En esta ocasion se presenta una metodologia que efectua una evaluacion energetica integral de las unidades de centrales termoelectricas (UCT) con el fin de determinar la raiz de los decrementos de potencia significativos producidos luego del servicio anual de mantenimiento. Dicha propuesta, ademas de identificar el origen de los problemas de eficiencia energetica, brinda informacion acerca de las aportaciones de cada uno de los equipos involucrados al decremento total de la unidad. Con esta metodologia, el mantenimiento se enfoca a los equipos que contribuyen a la mayor perdida de potencia. Este documento exhibe tal metodologia junto con su aplicacion en un caso real, resultados y las acciones correctivas necesarias, demostrando que su aplicacion ofrece bases para una inversion futura en medidas correctivas.

  3. Modern techniques for the emissions control in thermal electric stations; Tecnicas modernas para el control de emisiones en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Romo Millares, C. A. [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1995-12-31

    This paper presents the techniques and the control equipment for emissions in thermal stations that have the highest possibilities of being considered in the immediate future in the national energy panorama and the established frame for the environmental normativity. The pollutant compounds subject to revision are the nitrogen and sulfur oxides and unburned particles. [Espanol] Se presentan las tecnicas y equipos de control de emisiones para centrales termoelectricas que tienen mayores posibilidades de ser consideradas en el futuro inmediato dentro del panorama energetico nacional y el marco establecido por la normatividad ambiental. Los compuestos contaminantes sujetos a revision son los oxidos de nitrogeno y azufre y las particulas inquemadas.

  4. Electrochemical techniques application in corrosion problems of fossil power plants; Aplicacion de tecnicas electroquimicas en problemas de corrosion en centrales termoelectricas

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    Cano Castillo, Ulises; Garcia Ochoa, Esteban Miguel; Martinez Villafane, Alberto; Mariaca Rodriguez, Liboria; Malo Tamayo, Jose Maria; Uruchurtu Chavarin, Jorge [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    Some aspects of the electrochemical techniques employed to evaluate the corrosion at low temperature in fossil power plants are commented, as well as the results obtained with the application of them in three power plants of this type. [Espanol] Se comentan algunos aspectos de tecnicas electroquimicas utilizadas para evaluar la corrosion en baja temperatura en centrales termoelectricas, asi como los resultados de la aplicacion de las mismas en tres centrales de este tipo.

  5. Methodology for carrying out energy diagnosis in auxiliaries systems in thermal electrical central stations; Metodologia para realizar un diagnostico energetico en sistemas auxiliares de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Nebradt Garcia, Jesus [Comision Federal de Electricidad (CFE), Mexico, D. F. (Mexico); Rojas Hidalgo, Ismael; Huante Perez, Liborio [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    One of the potential areas for energy saving in Central Electric Power Plants are the auxiliaries system, so as to based in a preliminary energy diagnosis and considering that energy saving measures would be taken, going from the instrumentation, operational changes in equipment, as well as in using velocity variators in motors, it turns out to be that the energy consumption of auxiliaries at 75% load in a 150 MW thermal power plant varies from 3% to 4% and for the case of a 350 MW power plant the energy consumption of the auxiliaries represents 2 to 3.5%. Nowadays this consumption are above 6%. Considering that the country has 40 units with capacities varying from 150 to 350 MW, the economical and the fuel saving would be substantial. This paper will present a summary of the methodology to be used to carry out this type of projects. [Espanol] Una de las areas potenciales de ahorro de energia en centrales termoelectricas son los sistemas auxiliares, de tal manera que basados en un diagnostico energetico preliminar y considerando que se aplicarian las medidas de ahorro de energia que van desde la instrumentacion, cambios operativos en equipos, asi como el uso de variadores de velocidad en motores, se tienen que los consumos de auxiliares para un 75% de carga en una central termoelectrica de 150 MW varian desde un 3% hasta un 4% y para el caso de una central termoelectrica de 350 MW, el consumo de auxiliares representa del 2 al 3.5%. Hoy en dia dichos consumos estan por encima del 6%. Si consideramos que el pais cuenta con 40 unidades que varian desde 150 MW hasta 350 MW, entonces los ahorros economicos y de combustible serian impactantes. La presente ponencia mostrara un resumen de la metodologia a emplear para la realizacion de este tipo de proyectos.

  6. Foreseeing techniques and control of emissions in thermal power plants. Workshop Latin American. [Selected Papers]; Control y tecnicas de prevision de las emisiones de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Saldana, R.; Morales, F.; Urrutia, M. [eds.] [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1996-12-31

    This document contains the conference proceedings of the Latin-American Workshop ``Control and Prevision Techniques of Emissions in Power Plants`` carried out in Cuernavaca, Mexico on June 1996, with the participation of representatives of Argentina, Chile, Guatemala, Colombia, Ecuador, Mexico, Nicaragua, Panama and Venezuela, as well as specialists from the European Union. The core issue analyzed in this workshop was the control and the evaluation techniques of polluting emissions in Power Plants [Espanol] Este documento contiene las memorias de conferencia del Taller Latinoamericano ``Control y tecnicas de prevision de las emisiones de centrales termoelectricas`` que se llevo a cabo en Cuernavaca, Mexico en junio de 1996. Participaron representantes de Argentina, Chile, Guatemala, Colombia, Ecuador, Mexico, Nicaragua, Panama y Venezuela, asi como especialistas de la Union Europea. El tema central tratado en este taller fue el control y tecnicas de evaluacion de las emisiones contaminantes en centrales termoelectricas

  7. Feasibility of the operation CFE`s conventional power plants for industrial cogeneration; Factibilidad de operar las centrales termoelectricas convencionales de la CFE para cogeneracion industrial

    Energy Technology Data Exchange (ETDEWEB)

    Buendia Dominguez, Eduardo H.; Acosta Torres, Rosa Aracely [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1997-12-31

    An analysis is made on how cogeneration could help to maximize the power plant performance since thanks to cogeneration this type of power plants could utilize a part of the waste energy to be supplied to other processes. Also mention is made of the utilization of computer programs to help the design and the realization of functioning tests of this type of power plants. An economic evaluation is presented on the feasibility of operating this type of power plants as cogeneration units and it is concluded that the operation of fossil power plants in the cogeneration mode is not affected by the site where the power plant is located [Espanol] Se analiza como la cogeneracion podria ayudar a maximizar el rendimiento de las centrales termoelectricas ya que gracias a la cogeneracion este tipo de centrales podrian utilizar una parte de la energia desechada para suministrarla a otros procesos. Tambien se menciona la utilizacion de programas de computo para auxiliar en el diseno o realizacion de pruebas de funcionamiento sobre este tipo de plantas. Se presenta una evaluacion economica sobre la factibilidad de operar este tipo de plantas como unidades de cogeneracion y se concluye en que la operacion de centrales termoelectricas en modo de cogeneracion no se ve afectado por el sitio donde se encuentra la central

  8. Analysis of pumping systems to large flows of cooling water in power plants; Analisis de sistemas de bombeo para grandes flujos de agua de enfriamiento en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Sanchez, Ramon; Herrera Velarde, Jose Ramon; Gonzalez Sanchez, Angel [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)]. E-mail: rsanchez@iie.org.mx; jrhv@iie.org.mx; ags@iie.org.mx

    2010-11-15

    Accurate measurement of large water flows remains being a challenge in the problems of implementation of circulating water systems of power plants and other applications. This paper, presents a methodology for the analysis in pumping systems with high rates of water in power plants, as well as their practical application and results in pipelines water flow of a thermoelectrical power plant of 350 MW. In this power plant, the water flow per pipeline for a half of condenser oscillates around 7 m{sup 3}/s (14 m{sup 3}/s per power generating unit). In this analysis, we present the techniques used to measure large flows of water with high accurately, as well as the computational model for water circulating system using PIPE FLO and the results of practical application techniques. [Spanish] La medicion precisa de grandes flujos de agua, sigue siendo un reto en los problemas de aplicacion de sistemas de agua de circulacion de centrales termoelectricas, entre otras aplicaciones. En este articulo, se presenta una metodologia para el analisis de sistemas de bombeo con grandes flujos de agua en centrales termoelectricas, asi como, su aplicacion practica y los resultados obtenidos en los ductos de agua de circulacion de una central generadora con unidades de 350 MW. En esta central, los flujos por caja de agua oscilan alrededor de los 7 m{sup 3}/s (14 m{sup 3}/s por unidad generadora). En el analisis, se presentan las tecnicas utilizadas para medir con precision grandes flujos de agua (tubo de Pitot), asi como, el modelado del sistema de agua de circulacion por medio de un paquete computacional (PIPE FLO) y resultados obtenidos de la aplicacion de dichas tecnicas.

  9. Environmental management in Chile: The power plants case; Gestion ambiental en Chile: Caso de las centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Jadrijevic, Maritza [Comision Nacional del Medio Ambiente, (Chile)

    1996-12-31

    In this paper are presented the general aspects of the historic evolution o the legal norms on environmental matters in Chile; general aspects of the electric generation system and the instruments of environmental management currently applied in the fossil fueled power plants, such as: the assessment system of the environmental impact; compliance of the air quality and emissions Standards and plans for decontamination [Espanol] En este trabajo se dan a conocer aspectos generales de la evolucion historica de las normas juridicas en materia ambiental en Chile; aspectos generales del sistema de generacion electrica y los instrumentos de gestion ambiental que actualmente se aplican a las plantas de generacion termoelectricas, tales como: el sistema de evaluacion de impacto ambiental; cumplimiento de normas de la calidad de aire y de emision y, planes de descontaminacion

  10. Thermal analysis of the heat recuperator of a combined cycle thermoelectric central; Analisis termico del recuperador de calor de una central termoelectrica de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Romero Paredes, Hernando; Sanchez, I.; Lazcano, L. C.; Ambriz, Juan Jose; Alvarez, M. [Universidad Autonoma Metropolitana-Iztapalapa, Mexico, D. F. (Mexico); Gonzalez, O. [Comision Federal de Electricidad, Tula (Mexico)

    1996-12-31

    The thermoelectric centrals of the combined cycle type (Brayton Cycle and Rankine Cycle) present a series of opportunities to increase the efficiency of the combined cycle or of the generated power. This paper shows the methodology for the performance of energy balances in a heat recuperator (H. R.), typically employed in the combined cycle stations operating in Mexico, for the assessment of the energy harnessing in the different sections conforming a H. R. The effect of the installation of evaporative coolers and/or an absorption cooling system at the gas turbine compressor intake on the steam generation in the heat recuperator, is evaluated. This extra generation of steam is quantified for its potential use in the same absorption refrigeration system. From the assessment, it follows up that the steam generation in the H.R. is inversely proportional to the ambient temperature and that, although the increased amount of steam generated can not be harnessed in total by the steam turbine, the remaining fraction is good enough to cover the heat demand for the operation of the refrigeration system. [Espanol] Las centrales termoelectricas del tipo ciclo combinado (ciclo Brayton y ciclo Rankine) presentan un conjunto de oportunidades para incrementar la eficiencia del ciclo combinado o bien la potencia generada. En el presente trabajo se expone la metodologia para realizar los balances de energia en un recuperador de calor (R.C.) tipicamente utilizado en las Centrales de Ciclo Combinado (CCC) que operan en Mexico, para evaluar el aprovechamiento de la energia en las diferentes secciones que conforman un R.C. Se evalua el efecto que tiene la instalacion de enfriadores evaporativos y/o un sistema de enfriamiento por absorcion en la succion del compresor de la turbina de gas sobre la generacion de vapor en el recuperador de calor. Se cuantifica esta generacion extra de vapor para su posible utilizacion en el mismo sistema de refrigeracion por absorcion. De la evaluacion se

  11. Environmental management project of the Patache power plant project and associated transmission line; Gestion ambiental proyecto central termoelectrica Patache y linea de transmision asociada

    Energy Technology Data Exchange (ETDEWEB)

    Carreno Paredes, Cristian [Compania Electrica Tapaca (CELTA, S. A.), (Chile)

    1996-12-31

    This report makes a brief description of the services developed by INGENDESA of the projects executed in the area of engineering as well as in the area of environmental matters. In a second instance a relatively detailed presentation is made of the most important background of the Chilean project: {sup E}nvironmental Management of the Patache Power Plant and the Associated Transmission Line-Compania Electrica Tarapaca (CELTA, S.A.) Region I{sup .} The justification for the construction of the power plant and the environmental problems associated with the same are described [Espanol] En el presente informe se hace una breve presentacion de los servicios desarrollados por INGENDESA, de los proyectos elaborados tanto en el area de la ingenieria como en la tematica ambiental. En segunda instancia, se hace una presentacion relativamente detallada de los antecedentes mas importantes del proyecto chileno {sup G}estion Ambiental Central Patache y Linea de Transmision Asociada - Compania Electrica Tarapaca (CELTA, S.A.) I Region{sup .} Se describe la justificacion de la construccion de esta central termoelectrica y los problemas ambientales asociados a la misma

  12. Coordinated control of a combined cycle thermoelectric central; Control coordinado de una central termoelectrica de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Parra, Marino; Castelo Cuevas, Luis [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-03-01

    In this paper the coordinated control (CC) of the Distributed Control System (Sistema de Control Distribuido) (SICODI) of the Combined Cycle Central of Gomez Palacio, Durango, is presented. The description of the control scheme and its realization in software is made. From the scheme the operation strategies and automation, supervision and control are described in detail. The software components of the programming are described, the program structure and control data and its implementation in working stations VAX 3100 under the operating system VMS (Virtual Memory System), are described. [Espanol] En este articulo se presenta el control coordinado (CC) del Sistema de Control Distribuido (Sicodi) de la central de ciclo combinado Gomez Palacio, Durango. Se describe el esquema de control y su realizacion en software. Del esquema se detallan las estrategias de operacion y automatizacion, supervision y control. Del software se describen los componentes de la programacion, la estructura de programas y datos del control y su implementacion en estaciones de trabajo VAX 3100 bajo el sistema operativo VMS (Virtual Memory System).

  13. Diagnosis of feed water, condensate and circulation pumps in electric power plants; Diagnostico de bombas de agua de alimentacion, condensado y circulacion en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Colin Castellanos, Carlos [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1991-12-31

    This article encompasses the analysis and the diagnosis of the pump`s performance that belong to the feed water, condensate and circulation systems of a fossil fuel power plant (FFPP). For this analysis pressure, temperature and flow data were collected by means of field installed instrumentation, as well as these pumps` motors current consumption and voltage values. Later on, the capacity and the pump efficiency are calculated and compared with the design values, to obtain the actual performance of the equipment with the aid of their characteristic curves (Q vs {Delta}H, Q vs {pi}, etc.). [Espanol] Este articulo comprende el analisis y el diagnostico de comportamiento de las bombas, las cuales forman parte de los sistemas de agua de alimentacion, condensado y circulacion de una central termoelectrica (CT). Para el analisis se recopilan datos de presion, temperatura y flujo de la instrumentacion instalada en campo, asi como de los valores de consumo de corriente y de voltaje en los motores de dichas bombas. Posteriormente, se calcula la capacidad y la eficiencia de las bombas en operacion real y se comparan con los valores de diseno, para obtener el comportamiento real del equipo con ayuda de las curvas caracteristicas (Q vs {Delta}H, Q vs {pi}, etcetera).

  14. Solution to the colloidal silica problem in the San Luis Potosi power plant; Solucion del problema de silice coloidal en la central termoelectrica San Luis Potosi

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Rubalcava, Humberto [Comision Federal de Electricidad (CFE), Mexico, D. F. (Mexico); Mercado, Sergio [Instituto de Investigaciones Electricas, Cuernavaca (Mexico); Guerra, Protasio [Comision Federal de Electricidad (CFE), Mexico, D. F. (Mexico)

    1988-12-31

    In June 1986 the Comision Federal de Electricidad (CFE) made tests to raise the load of the first normalized unit of 350 MW of the San Luis Potosi Power Plant; although the new system for colloidal silica removal had not yet been installed, consisting of a hollow fibers ultra-filtration system with a capacity of 110 m{sup 3}, that for the first time would be applied in a Mexican power plant. It was decided to install this system due to the fact that the well water supplying this power plant comes from a geothermal reservoir, with water at 38 degrees Celsius and a silica content of 15 to 250 parts per billion (ppb) of colloidal silica, which makes it necessary to eliminate it in order to enable the boiler operation at its design conditions (175 bars (2573 psig) and 540 degrees Celsius). Although a demineralizing plant existed for the boiler feed water make up, the ion exchange resins were not able to retain the colloidal silica. Also, the First Unit operation was held at 25% of its rated capacity; in trying to raise the output to 50%, the silica concentration in the boiler water went over the allowed limits, resulting in a concentration of 1,500 ppb in the boiler water and 28 ppb in the steam. One the ultra-filtration plant was installed, the power plant operated at full rated capacity with silica concentrations in the steam lower than the permitted concentration, i.e. 10 ppb . By the end of 1987 the Second Unit of 350 MW was put into operation with the ultra-filtration system in operation, reaching full load without any problem. Once confirmed the efficiency of the ultra-filtration for the colloidal silica removal, CFE will apply this system in other power plants of the country having the same problem. [Espanol] En junio de 1986, la Comision Federal de Electricidad (CFE) efectuo pruebas de elevacion de carga en la primera unidad normalizada de 350 MW de la central termoelectrica San Luis Potosi; sin embargo, aun no se terminaba de instalar el nuevo sistema para la

  15. Heat transfer equipment performance diagnosis of auxiliary systems in electric power stations; Diagnostico de comportamiento de equipo de transferencia de calor de sistemas auxiliares de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz Esparza Gutierrez, Rogelio [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    In this article the methodology followed to diagnose the performance of the equipment where heat is transferred from the feed water, condensate and circulation water systems in fossil power plants (FPP). The data collection is made with the unit in normal operation, using local instrumentation without taking the equipment out of service for its installation. The equipment diagnosis is made through the analysis of the collected data in actual operation and the design data; for this purpose a thermal balance of the interested systems is performed to obtain all the conditions an operation data. Later on the performance indicative parameters (PIP) of actual operation and design are calculated and compared one against the other. Such a comparison reveals the performance deterioration and the possible equipment faults. The data obtained and the supplementary information are stored in a data base whose objective is that Comision Federal de Electricidad has on hand a prompt access to them in order to control the performance, compare them among similar units and power stations, and inclusively verify possible recurrent causes of low availability in the referred systems. [Espanol] En este articulo se presenta la metodologia seguida para diagnosticar el comportamiento de equipos en los que se transfiere calor de los sistemas de agua de alimentacion, condensado y circulacion de las centrales termoelectricas (CTE). La toma de datos se realiza con la unidad en operacion normal, utilizando instrumentacion local sin necesidad de sacar de servicio a los equipos para su instalacion, ya que se ocupan los mismos puntos para instrumentos con que cuentan por diseno. El diagnostico de los equipos se realiza mediante el analisis de los datos recopilados, tanto de operacion real como de diseno; para ello, se efectua un balance termico de los sistemas de interes para obtener todas las condiciones y los datos de operacion. Posteriormente, se calculan los parametros indicativos de

  16. Modern concepts of thermodynamic optimization in Mexican thermoelectric stations; Conceptos modernos de optimacion termodinamica en centrales termoelectricas mexicanas

    Energy Technology Data Exchange (ETDEWEB)

    Cervantes-de Gortari, J; Vidal-Santo, A.; Mendez-Lavielle, F.; Bautista-Godinez, O. [Departamento de Termoenergia, from Facultad de Ingenieria UNAM (Mexico)

    2002-03-01

    In this paper, a summary review of the current thermodynamic concepts related to the maximum power generation and minimum entropy production are presented. The results of the analysis are considered in Mexican power stations using conventional cycles and are compared with other power stations around the world. [Spanish] En este trabajo se revisa el analisis de maxima generacion de potencia que implica la minimizacion de la produccion de entropia en centrales generadoras de potencia. De acuerdo con los lineamientos mas recientes publicados en la literatura. Los conceptos y resultados del analisis se aplican a varias centrales mexicanas y se comparan con otras centrales en el mundo.

  17. Control of a deareador level of a thermoelectric power station using modern control techniques; Control de nivel de un deareador de una central termoelectrica utilizando tecnicas de control moderno

    Energy Technology Data Exchange (ETDEWEB)

    Chavez Estrada, Jose Israel

    1997-01-01

    The present work shows the implementation of the scheme of predictive control IMC (Internal Model Control) in order to control the level of the deareador of a combined cycle thermoelectric power station of (C.C.T.S.). The implementation has the purpose of looking for alternative strategies of control to the classic ones (PID`s) that more efficiently control the variables of interest, in addition to getting into the new control techniques of control. Following the philosophy of predictive control IMC the form to applying this technique is shown, as well as the implementation of this type of controllers. A comparison of predictive control IMC is made with the scheme of conventional control (three control elements PID`s ) used at present to control the level of the deareador in the Combined Cycle Thermoelectric Power stations of Dos Bocas, Veracruz, Mexico and of Gomez Palacio, Durango, Mexico. [Espanol] El presente trabajo muestra la implementacion del esquema de control predictivo IMC (Control con Modelo Interno) con el objeto de controlar el nivel del deareador de una Central Termoelectrica de Ciclo Combinado (C.T.C.C.). La implementacion tiene la finalidad de buscar estrategias de control alternas a las clasicas (PID`s) que controlen mas eficientemente la variable de interes, ademas de incursionar en las nuevas tecnicas de control. Siguiendo la filosofia del control predictivo IMC se muestra la forma de aplicar esta tecnica, asi como la implementacion de este tipo de controladores. Se hace una comparacion del control predictivo IMC con el esquema de control convencional (control de tres elementos PID`s) utilizando actualmente para controlar el nivel del deareador en las centrales termoelectricas de ciclo combinado de Dos Bocas, Veracruz y de Gomez Palacio, Durango en Mexico.

  18. Diffusion and dispersion heat of hydrotermal discharge from power plant; Difusion y dispersion de calor de la descarga hidrotermal de una central termoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Rendon Villalobos, J. Rodolfo

    1996-12-31

    numerica del comportamiento hidrodinamico de la descarga al mar del agua de enfriamiento de la central termoelectrica Tuxpan (CTT) bajo dos distintas condiciones ambientales meteorologicas y oceanograficas, a saber: Caso I, viento variable de direccion SW con intensidad promedio igual a 3 m s-1 y Caso II, viento variable del NW con intensidad promedio igual a 11.10 m s-1. Las simulaciones numericas se realizaron mediante un modelo tridimensional de circulacion costera y difusion y dispersion de calor. El analisis estadistico del banco de datos de intensidad y direccion del viento medido del 1 de enero de 1981 al 31 de diciembre de 1983, indica que el numero de valores de mayor ocurrencia se presento dentro del intervalo de 180 grados a 315 grados. Por lo mismo, el efecto del viento proveniente del sector sur genera un patron de circulacion superficial de flujo norte que alejan de la obra de toma el agua caliente descargada. En contraste, el viento que proviene del sector norte genera corrientes superficiales de flujo sur que impulsa el efluente hidrotermico hacia la obra de toma. Las comparaciones entre los resultados de las simulaciones numericas y los datos de campo indican que, para una variedad de condiciones ambientales meteorologicas y oceanograficas representativas del Sitio Tuxpan (ST), el modelo simula correctamente los patrones de difusion y dispersion superficial de los efluentes medidos los dias 19, 20 y 21 de agosto de 1992 (Caso I) y 26 de noviembre de 1992 (Caso II). La precision promedio con la cual el modelo predice las areas de impacto de los efluentes descargados en el ST es de {+-} 11%. Para todos los casos analizados, el tamano real del area de impacto termico que podria alterar substancialmente el ecosistema marino no fue mayor a 0.1 Km{sup 2}. Los posibles efectos ecologicos que podrian resultar como consecuencia de los gradientes termicos inducidos por la descarga superficial de agua caliente solo podrian ser considerados de significancia local. Los

  19. Actions for the environmental adequateness and emissions control at the Martin del Corral power plant-Termozipa; Obras de adecuacion ambiental y control de emisiones para la central termoelectrica Martin del Corral - Termozipa

    Energy Technology Data Exchange (ETDEWEB)

    Arevalo Osorio, Luis [Empresa de Energia de Bogota, Bogota (Colombia)

    1996-12-31

    In this paper the general data on the Martin del Corral-Termozipa, of Colombia, fossil fueled power plant are exposed. The results of a study to determine the environmental impact originated in the influence zone of this Power Plant are presented, particularly on the Bogota River. The study was framed into the environmental policy driven by the Colombian sector. Different solutions addressed to the optimization of the handling, capacity and control of the emissions and counteract the pollution possibilities of the Bogota River are described [Espanol] En esta ponencia se exponen datos generales de la central termoelectrica Martin del Corral - Termozipa-, de Colombia. Se presentan los resultados de un estudio para determinar el impacto ambiental ocasionado en la zona de influencia de esta central, y en particular sobre el rio Bogota. El estudio se enmarco dentro de la politica ambiental impulsada por el sector colombiano. Se describen diversas soluciones encaminadas a optimizar el manejo, capacidad y control de las emisiones y contrarrestar las posibilidades de contaminacion del rio Bogota

  20. Present situation of the control of the transmissions of thermal power plants in Colombia; Situacion actual del control de las emisiones de centrales termoelectricas en Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Lozada, Hector [Consultor Ambiental, Bogota (Colombia)

    1996-12-31

    This paper presents, departing from a historical recollection, the evolution analysis of the Colombian Electric Sector, with emphasis in the electric component performance. Also, a general view is offered on the characteristics of the thermal electric resource in terms of energy production level, type of fuels used and annual amount of air pollutants originated in the combustion process. In the second part of the paper the normative scheme and the regulation for emissions control, particularly coming from power plants; and the tendencies in the policies that for the management of the atmospheric resource are being implemented in the country are identified. [Espanol] En este articulo se presenta, a partir de un breve recuento historico, el analisis de la evolucion del Sector Electrico Colombiano con enfasis en el comportamiento del componente termoelectrico. Asi mismo se ofrece una vision general sobre las caracteristicas del parque termico, en terminos de los niveles de produccion de energia, los tipos de combustibles utilizados y las cantidades anuales de contaminantes atmosfericos que se generan en el proceso de combustion. En la segunda parte del trabajo se comenta el esquema normativo y la regulacion para el control de las emisiones, en particular de las procedentes de plantas termoelectricas; y se identifican las tendencias de las politicas que para la administracion del recurso atmosferico se estan implantando en el pais.

  1. Starting of the steam generator of a fossil fuel power plant, using predictive control based in a neuronal model; Arranque del generador de vapor de una central termoelectrica, usando control predictivo basado en un modelo neuronal

    Energy Technology Data Exchange (ETDEWEB)

    Gallardo Dominguez, Tonatiuh

    2004-09-15

    In this thesis work it is presented the design and implementation of a simulator of total scope of a predictive controller based in the neuronal model of the temperature in two stages of the heating of the steam generator of a fossil fuel power plant. An implemented control scheme is detailed, as well as the methodology for the identification of a neuronal model utilized for the control. Finally the results of the implementation in the simulator located at the Instituto de Investigaciones Electricas (IIE) are shown to be satisfactory. This control structure is not applied directly in closed circuit, but provides the value of the control actions to a human operator. [Spanish] En este trabajo de tesis se presenta el diseno e implementacion, en un simulador de alcance total, de un controlador predictivo basado en un modelo neuronal para el control de la temperatura en dos etapas del calentamiento del generador de vapor de una central termoelectrica. Se detalla el esquema de control implementado, asi como la metodologia de identificacion de un modelo neuronal utilizado para la sintesis del control. Finalmente se muestran los resultados de la implementacion en el simulador que se encuentra en el Instituto de Investigaciones Electricas (IIE); dichos resultados fueron satisfactorios. Esta estructura de control no se aplica directamente en lazo cerrado, sino que provee el valor de las acciones de control a un operador humano.

  2. Advances in the research line of diagnosing of faults in fossil fuel power plants; Avances en la linea de investigacion de diagnostico de fallas en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Ruz H, Jose A [Universidad Autonoma del Carmen, Campeche (Mexico); Sanchez C, Edgar N [Centro de Investigacion y Estudios Avanzados del Instituto Politecnico Nacional, Mexico, D.F. (Mexico); Suarez Cerda, Dionisio A; Quintero R, Agustin [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2006-07-01

    This article deals with a research in progress searching to take care of the faults that occur with greatest frequency in the fossil fuel power plants of Mexico with the aid of tools of computational intelligence such as the neuronal networks and the fuzzy logic, for the online recognition of the dynamic behavior patterns of variable groups. What this research looks for is the development of individual systems, in relation to the computational intelligence techniques that continuously supervise the functioning of the unit and inform the operator of the eventual faults in the understanding that on time attention to the faults will result in a minimum cost. The advantages of these diagnosis mechanisms are established in comparison to alternative diagnosis methods, such as their associative memory useful to store fault patterns. [Spanish] Se trata de una investigacion en progreso que busca atender las fallas que ocurren con mayor frecuencia en las unidades termoelectricas de Mexico con la ayuda de herramientas de inteligencia computacional como las redes neuronales y la logica difusa, para el reconocimiento en linea de patrones de comportamiento dinamico de grupos de variables. Lo que esta investigacion busca es desarrollar sendos sistemas, en relacion a las tecnicas de inteligencia computacional, que supervisen continuamente el funcionamiento de la unidad e informen al operador de fallas eventuales, en el entendido que la oportuna atencion a fallas redituara en un costo minimo. Las ventajas de estos mecanismos de diagnostico se establecen en comparacion a metodos de diagnostico alternativos, como su memoria asociativa util para almacenar patrones de falla.

  3. Computerized system for the support of the predictive maintenance in thermoelectric power stations of Comision Federal de Electricidad; Sistema computarizado para el apoyo del mantenimiento predictivo en centrales termoelectricas de la Comision Federal de Electricidad

    Energy Technology Data Exchange (ETDEWEB)

    Aranda A, Segio; Garcia M, Raul; Poujol G, Francisco; Chairez C, Carlos; Dominguez M, Nely [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2002-07-01

    This paper describes the functionality of the Integral System of Information for the Diagnosis of Predictive Maintenance (SIIDMP) in the thermoelectric centrals, whose primary target is to give support to the personnel related with the maintenance and operation of the thermoelectric central to optimize the application of the inspection, maintenance and its associated costs. It is important to comment that in the generating power stations of Comision Federal de Electricidad (CFE) techniques and methodologies for the preventive and corrective maintenance are applied, in addition of which they count on electronic equipment of operation dedicated to the inspection and control of vibratory equipment. The architecture of the SIIDMP is of the client-server type and for its design and implantation Windows NT 4.0 was used as operating system, SQL Server 7.0 as server and manager of the database, Visual C++ for the programs of data mining, Vision Basic 6.0 for the codification of the application programs and Interface Man-Machine (IMM), the communication mechanism Open Data Base Connectivity (ODBC) to establish the connection with the different data sources, as well as libraries of symbols and graphs that were included in the interface of the user. The main objective of the SIIDMP is to take care of the own necessities on optimization, improvements and savings in the operation of the power stations. With systems like the SIIDMP, a reduction of the costs due to shutdowns by accidental failures of the main equipment is looked for, limiting the deterioration of the equipment, as well as to provide knowledge and aid to all the personnel who take part in the management of the operation and conservation of the facilities of the power station. [Spanish] Se describe la funcionalidad del Sistema Integral de Informacion para el Diagnostico de Mantenimiento Predictivo en las centrales termoelectricas (SIIDMP), cuyo objetivo principal es apoyar al personal relacionado con el

  4. Monitoring and diagnosis of condensation systems in thermoelectric power stations: behavior indicators; Monitoreo y diagnostico de sistemas de condensacion en centrales termoelectricas: indicadores de comportamiento

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Martinez, Hugo; Sanchez Sanchez, Ramon [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2009-07-01

    In this article are described the basic characteristics, capacities and benefits of a computer system for the monitoring and operation diagnosis of the main equipment of a condensation system of thermoelectric power plants. The system monitors the process variables in real time and, with base in these variables, it can realize a diagnosis of the cooling tower, the condenser, the circulation water and the circulating water pumps, deducting the possible problems (deficiency causes) and raising alternatives to improve the system performance or to solve the problem. It is important to mention that with base in the raised alternatives, the user can take decisions to diminish or eliminate the problem. The essential content of the article focuses in the description of the basic procedures for the calculation of the performance and diagnosis indicators of the condensation system of the equipment. The equipment evaluation is carried out by means of the comparison between the indicators values and the expected ones, whereas the diagnosis is realized by means of an expert system. [Spanish] En este articulo se describen las caracteristicas principales, capacidades y beneficios de un sistema computacional para el monitoreo y diagnostico del funcionamiento de los equipos principales de un sistema de condensacion de plantas termoelectricas. El sistema monitorea las variables del proceso en tiempo real y, con base en dichas variables, puede realizar un diagnostico de la torre de enfriamiento, el condensador y las bombas de agua de circulacion, deduciendo los posibles problemas (causas de las deficiencias) y planteando alternativas para mejorar el desempeno del sistema o solucionar el problema. Es importante mencionar que con base en las alternativas planteadas, el usuario puede tomar decisiones para reducir o eliminar el problema. El contenido esencial del articulo se enfoca en la descripcion de los procedimientos basicos para el calculo de los indicadores de desempeno y

  5. Robust velocity and load control of a steam turbine in a combined cycle thermoelectric power station; Control robusto de velocidad y carga de una turbina de vapor en una central termoelectrica de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Reyes Archundia, Enrique

    1998-12-31

    of the computation, the programming languages and the numerical methods allow to develop mathematical models that simulate in an approximate manner the processes to control, as it is the case of the combined cycle thermoelectric power station and in this way making the evaluation of algorithms of modern control possible. In chapter I a functional description of the steam turbine process is given. Since this belongs to a combined cycle thermoelectric power station, it is begun with the description of this power station, later to emphasize the subsystem of the steam turbine and emphasize each one of the elements that comprise this last one. [Espanol] Este trabajo de investigacion esta orientado a disenar, desarrollar y validar un algoritmo de control moderno, que permita la obtencion de mejores desempenos en el control de velocidad de una turbina de vapor perteneciente a una central termoelectrica de ciclo combinado, en todo el intervalo de operacion, asi como la obtencion de mejores desempenos en el control de la cantidad de megawatts generados por la misma cuando esta acoplada a un generador electrico, comparando el desempeno con el obtenido mediante el controlador convencional existente. Los cambios en la referencia de velocidad o carga, son a solicitud del operador y se dan siempre en forma de rampa, indicando la rapidez con la que se desea efectuar el cambio de valor en la referencia. Esta es la razon por la cual el objetivo principal del control a disenar es realizar un buen seguimiento a referencias del tipo rampa. En el subsistema de la turbina de vapor existente el inconveniente de que las valvulas que regulan el flujo de vapor hacia la turbina, presentan un acoplamiento con la valvula del bypass que permite derivar el flujo de vapor hacia el condensador principal sin tener que pasar por la turbina. Es por esto que se propone un control multivariable que contemple la interaccion que se presenta entre las valvulas antes mencionadas, partiendo de un diseno

  6. Results in energy saving obtained with the application of speed variator in fossil power stations; Resultados de ahorro de energia obtenidos con la aplicacion de variadores de velocidad en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Merlos Rueda, Rosa Maria [Programa de Ahorro de Energia del Sector Electrico (PAESE), Mexico, D. F. (Mexico)

    1999-07-01

    The project of installation of speed variator in fossil power stations (CT's) of Comision Federal de Electricidad (CFE), as an energy saving measure, is a pilot project that began with the support of the Subdivision de Generacion, and promoted by the Energy Saving Program of the Electric Sector (PAESE), with the putting in operation of an equipment in the condensate pump of the Punta Prieta II C. T. U3. The energy saving observed was substantial, fluctuating between the 19.4% at high loads (at 90% load) and the 71.1% at low loads (at 40% load) of the generating unit. With these results, it was decided to extend the scope of the project with the installation of 6 more equipment for equal number of fossil power stations, located in 4 of the 5 Regions of Generation. The fossil power stations, selected for this stage of the project were: C. T. Felipe Carrillo Puerto U1, C.T. Lerma U4, C.T. Salamanca U1, C.T. Monterrey U6, C.T. Francisco Villa U3 and the C.T. Punta Prieta II-U1. The equipment was in operation during the first quarter of 1998, and the first results indicate an energy savings average per equipment, between 39% and 52%. The recovery of the investment fluctuates between the 48.4% and the 87.6% in less than two years of operation, with which a maximum period of recovery of 3 years is expected. The estimated potential of energy saving, considering the application of these devices in condensate pumps, feedwater pumps (where no speed variator is installed) forced draft fans, induced draft fans and gas recirculation fans, as well as circulation water pumps, of the existing Generating Power stations, ascends to an annual total of 830,000, which represents an approximate 9.4% of the National consumption of self services. [Spanish] El proyecto de instalacion de variadores de velocidad en Centrales Termoelectricas (CT's) de la Comision Federal de Electricidad (CFE), como medida de ahorro de energia, es un proyecto piloto que se inicio con el apoyo de la

  7. General diagnosis on the control of the pollution by combustion gases of the fossil fueled power plants of the Instituto Ecuatoriano de Electrificacion (INECEL); Diagnostico general del control de la contaminacion de los gases de la combustion en las centrales termoelectricas del Instituto Ecuatoriano de Electrificacion (INECEL)

    Energy Technology Data Exchange (ETDEWEB)

    Romero Arce, Efren [Central Termica Gonzalo Zevallos, (Ecuador)

    1996-12-31

    In this paper are presented the characteristics of the electric sector of Ecuador, its interconnected system, the principal laws in effect on the prevention and control of the environmental pollution related to the electric sector and an overview of the pollution control in the fossil fueled power plants of the Instituto Ecuatoriano de Electrificacion (INECEL) [Espanol] En este trabajo se presentan las caracteristicas del Sector Electrico del Ecuador, su Sistema Nacional Interconectado, las principales leyes vigentes en el pais sobre la prevencion y control de la contaminacion ambiental relacionadas con el sector electrico y, un panorama general con respecto al control de la contaminacion en las centrales termoelectricas del Instituto Ecuatoriano de Electrificacion (INECEL)

  8. Santiago Ramon y Cajal and Neuron Doctrine

    Directory of Open Access Journals (Sweden)

    Simge Aykan Zergeroğlu

    2015-09-01

    Full Text Available Santiago Ramon y Cajal’s emergence in the world of science has led to a new era in neuroscience. He was the founder of modern neuroscience with the neuron doctrine he revealed. He showed that nervous system was not a continuum network structure as it is believed to that day, but consists of individual cell as in all other tissues. His contribution to modern neuroscience was not limited to the neuron doctrine, he also contributed to neuronal morphology, communication and development. All of these contributions was honored with a shared Nobel Prize Award with Camillo Golgi in 1906, for their studies on the nervous system. Santiago Ramon y Cajal, was a scientist with unusual observation and interpretation talents, who pushed the conditions until the end to access to information and share his findings in the underdeveloped scientific environment of Spain. Besides, he was involved in scientific breakthroughs of his country. Ramon y Cajal was not only a scientist but also a multi-faceted personality; a passionate chess player, gymnast, a very talented painter and photographer.

  9. Opportunities for the operation of the Comision Federal de Electricidad`s fossil fuel power plant stations eventually to be retired as cogeneration units; Oportunidades de operar las centrales termoelectricas de la Comision Federal de Electricidad, eventualmente retirables como unidades de cogeneracion

    Energy Technology Data Exchange (ETDEWEB)

    Buendia Dominguez, E. H. [Instituto de Investigaciones Electricas, Cuernavaca (Mexico); Merlos Rueda, R. M. [Programa de Ahorro de Energia para el Sector Electrico, Mexico, D. F. (Mexico)

    1995-12-31

    The Programa de Ahorro de Energia para el Sector Electrico (PAESE) (Program for Energy Conservation for the Electric Sector) in collaboration with the Instituto de Investigaciones Electricas (IIE), decided to evaluate technically and economically the possibilities of operating the Comision Federal de Electricidad`s Thermoelectric Power Stations (TPS), eventually to be retired as cogeneration units in supplying thermal energy to industry. The study was focussed to the Monterrey and San Jeronimo Power Stations, determining in a first stage, the optimum radius for handling and transporting steam and/or hot water and so to define the industries that potentially could obtain heat energy from the TPS, in this stage the thermal needs of the evaluated industries were determined (pressure, temperature and flow). In a second stage, the different arrangements to be made to operate the selected TPS, so as to be in position of satisfying such thermal energy demands were evaluated. This paper presents the results of this study. [Espanol] El Programa de Ahorro de Energia para el Sector Electrico (PAESE), en colaboracion con el Instituto de Investigaciones Electricas, decidieron evaluar tecnica y economicamente las posibilidades de operar las centrales termoelectricas (CT`s) de la Comision Federal de Electricidad, eventualmente retirables, como unidades de cogeneracion al ofrecer calor a la industria. El estudio se enfoco en las centrales de Monterrey y San Jeronimo, determinado en una primera etapa el radio optimo para el manejo y transporte de vapor y/o agua caliente y asi definir a las industrias que potencialmente podrian recibir calor de las CT`s, en esta etapa se determinaron las necesidades termicas de las industrias evaluadas (presion, temperatura y flujo). En una segunda etapa se evaluo los diferentes arreglos para operar las CT`s seleccionadas para que pudieran satisfacer dichas demandas termicas. En este trabajo se presentaron los resultados de dicho estudio.

  10. Intelligent system of aid for the starting of fossil fuel units; Sistema inteligente de ayuda para el arranque de unidades termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Suarez Cerda, Dionisio A; Ibargueengoytia Gonzalez, Pablo H; Villavicencio Ramirez, Alejandro [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    1999-07-01

    In this article the aid system for the starting of fossil fuel units is described (SIAAT) based on techniques of artificial intelligence, that the Management of Supervision of Processes of the Instituto de Investigaciones Electricas (IIE) develops. It analyzes the problem of the starting of fossil fuel units, which sets out to solve through computer techniques based on artificial intelligence. The system architecture is proposed and the challenges that are due to face are mentioned so that the system works in line with the process and along with it. In addition to the technical aspects covered in the project, the more relevant results that make an impact in the expectations of application of the system are mentioned, as well as the expected benefits of its use in fossil fuel power stations. [Spanish] En este articulo se describe el Sistema de ayuda para el Arranque de Unidades Termoelectricas (SIAAT) basado en tecnicas de inteligencia artificial, que desarrolla la Gerencia de Supervision de Procesos del Instituto de Investigaciones Electricas (IIE). Se analiza el problema del arranque de unidades termoelectricas, el cual se propone resolver a traves de tecnicas computacionales basadas en inteligencia artificial. Se presenta la arquitectura del sistema y se mencionan los retos que se deben enfrentar para que el sistema funcione en linea junto con el proceso. Ademas de los aspectos tecnicos abordados en el proyecto, se mencionan los resultados mas relevantes que impactan en las expectativas de aplicacion del sistema, asi como los beneficios esperados de su uso en centrales termoelectricas.

  11. On line chemical analyzers for high purity steam and water, applied to steam power plants; Analizadores quimicos en linea para agua y vapor de alta pureza, aplicados a centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Diaz Perez, Ruth [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1989-12-31

    This article presents a general overview of the advances in the subject of on line analyzers of chemical parameters for high purity water and steam and specifies which ones are commercially available. Also are mentioned besides, the criteria nowadays applied for the selection of the sites for sample grabbing and the analysis that is necessary to perform in each point, depending on the power plant type and the treatment administered (phosphates-Ph coordinated or AVT treatment). [Espanol] El articulo presenta un panorama general de los avances que en materia de analizadores de parametros quimicos en linea para agua y vapor de alta pureza, y especifica cuales estan disponibles en forma comercial. Se citan, ademas los criterios que se aplican actualmente para seleccionar los puntos de toma de muestra y los analisis que es necesario efectuar en cada punto, dependiendo del tipo de central y del tratamiento que se le administre (fosfatos-pH coordinado o tratamiento AVT).

  12. Ramon Lindali kõrgeim hüpe / Annika Poldre

    Index Scriptorium Estoniae

    Poldre, Annika

    2005-01-01

    Endisele tippsportlasele Ramon Lindalile kuulub viis firmat Eestis ja Soomes, kus valmistatakse eksklusiivsisustust laevadele, hotellidele ja restoranidele ning tegeldakse disaini ja projekteerimisega

  13. Fluvial systems response to rift margin tectonics: Makhtesh Ramon area, southern Israel

    Science.gov (United States)

    Ben-David, Ram; Eyal, Yehuda; Zilberman, Ezra; Bowman, Dan

    2002-06-01

    The geomorphic evolution of Makhtesh Ramon, a feather-shaped erosional valley, and the Nahal Neqarot drainage system to the south occurred largely in response to tectonic activity along the Dead Sea Rift and its western shoulder. Remnants of Miocene clastic sediments (Hazeva Formation) deposited on an erosional peneplain that formed over this area during the Oligocene epoch provide a datum plane for reconstructing subsequent fluvial evolution. These clastic remnants are presently located on the shoulders of Makhtesh Ramon at various elevations. The peneplain truncating the Makhtesh Ramon block has been tilted 0.7% northeastward since the Pliocene epoch (post-Hazeva Formation), whereas that of the Neqarot syncline, south of the Ramon, has been tilted 1.2%. The elliptical exposure of friable Lower Cretaceous sandstone, exposed in the core of the truncated Ramon structure, governed the development of a new ENE directed (riftward) drainage system through capture of streams that previously drained toward the Mediterranean Sea to the northwest. Incised fluvial gaps in the southern rim of Makhtesh Ramon and alluvial fan relicts within Makhtesh Ramon attest to original drainage into the Makhtesh from the south. Remnants of the Plio-Pleistocene Arava Conglomerate on the eastern end of the Neqarot syncline contain clasts from rocks exposed within Makhtesh Ramon, also indicating that streams flowed into the Makhtesh from the southern Neqarot block through the western gaps, then turning eastward and exiting the Makhtesh via the next (Sha'ar-Ramon) gap to the east. Further down-faulting of the Neqarot block during Mid-Late Pleistocene time led to westward retreat of the Neqarot valley and capture of the last stream flowing northward into the Ramon, leaving the modern Makhtesh Ramon isolated from the southern drainage system.

  14. Ramon Xuriguera (1901-1966): ideologia, activitat cultural i literatura

    OpenAIRE

    Camps i Arbós, Josep

    2005-01-01

    La tesi és una monografia sobre Ramon Xuriguera i Parramona (Menàrguens, 1901 - Bergerac, 1966), un autor poc conegut i, segurament, infravalorat de la nostra història cultural. L'estudi es divideix en nou capítols que avancen cronològicament. El primer s'ocupa del punt de partida de Xuriguera en el món de la literatura i del periodisme. El segon indaga en els anys de formació a la ciutat de Lleida i es comenta, de manera preferent, el paper fonamental que va tenir en l'intent d'articular une...

  15. Consideracions sobre el Patrimoni dels Ordes Militars a Catalunya en temps de Ramon Berenguer IV

    Directory of Open Access Journals (Sweden)

    Bonet Donato, Maria

    1998-12-01

    Full Text Available The patrimony and prominence of templars and hospitallers increased dramatically in the time of count Ramon Berenguer IV. Feudal lords made their first donations before 1134 and there were considerable increases from that year until 1148. During this period, these orders settled in central Catalonia, where they attracted or forced donations pro anima to assure their jurisdictional and, especially, their patrimonial rights. The count's support in this was crucial although initially it was merely an attempt to find favour, particularly with the templars. Following the testamentary agreements, the count's interests coincided with those of the orders and this positioned them at the vanguard of the country from 1148 onwards. In this period, the orders consolidated their position in the principality and the count granted them the large territories of "Catalunya Nova", from where the knights increased their patrimony by accumulating more land. The interests, strategies and actions of the feudal authorities placed important new domains in the hands of the templars and hospitallers who, because of the very nature of their orders, were in fact ideal for reorganizing both the lands and peoples recently brought under feudal control.[fr] A l’époque de Ramon Berenguer IV les templiers et les hospitaliers ont joué un rôle important et ont augmenté leur patrimoine. De grands seigneurs féodaux ont fait des premiers dons avant 1134, et Jusqu'en 1148. ceux-ci sont accrus considérablement. A cette époque, les ordres ont implanté leurs domaines dans la Catalogne centrale et ont attiré ou forcé les premiers dons pro anima dans le but de parachever les droits juridictionnels et surtout patrimoniaux. Le soutien de Ramon Berenguer IV a été déterminant, bien qu'au départ, il s'agissait d'une stratégie visant une approche vers le Temple. Suite aux accords testamentaires, les intérêts du comte ont rejoint ceux des ordres qui, dès lors, ont été à l

  16. Characterization of agua de Ramon marbles, Cordoba Province, Argentina

    International Nuclear Information System (INIS)

    Agua de Ramon district is located in the NW of Cordoba, Argentina, between 3 49' and 30052' S and 65021' and 65024' W, in the Eastern Pampean Range setting. It was a very important tungsten district until the end of 1950'decade when tungsten mining became of no economic interest. The objective is to report for the first time the petrological, mineralogical and geochemical characteristics of several marble lenses located in the sourthern of the area. Marble outcrops are lenticular ranging from 1 m to 80 m in length and 0.50 m to 20 m width. They appear massive, fine-grained and in light colors (white, pale green, very light brown and pale gray). These last varieties show a distinct banded structure due to little differences in color. These marbles are mainly composed of magnesian calcite accompanied by minor amounts of dolomite, forsterite, humite group minerals, tremolite, talc, serpentine and clinochlore, and scheelite, sphene, apatite and opaque minerals like hematite, magnetite, illmenite, pirrothite and pyrite as accessory minerals. Major chemical analyses indicate a relatively high SiO2 and MgO content, and minor CaO, in comparison with marbles of this type. Mineral paragenesis was useful to evaluate metamorphism conditions in this area

  17. Drawing into abstraction. Practices of observation and visualisation in the work of Santiago Ramon y Cajal

    NARCIS (Netherlands)

    De Rijcke, Sarah

    2008-01-01

    Santiago Ramon y Cajal's neurohistological work marked a turning point in ongoing debates on the morphology of the nervous system. From 1888 onwards, he published extensively on the anatomic unity of the nerve cell. His experiments with the chrome silver stain resulted in highly particular ways of s

  18. Toward a Trans(National) Reading of Ramon "Tianguis" Perez's "Diario de un mojado"

    Science.gov (United States)

    Sisk, Christina L.

    2009-01-01

    In Ramon "Tianguis" Perez's "Diario de un mojado", Perez identifies primarily as a "mojado" and a "macuiltianguense" (a person from San Pablo de Macuiltianguis, Oaxaca). The concept of community as elaborated in the diary incorporates macuiltianguenses on both sides of the border. This essay argues that Perez's transnational community must be…

  19. Thermoelectric power plant conversion from fuel oil to coal with integration of a CO{sub 2} capture plant. Part 1; Conversion de una central termoelectrica de combustoleo a carbon con integracion de una planta de captura de CO{sub 2}. Parte 1

    Energy Technology Data Exchange (ETDEWEB)

    Huante Perez, Liborio; Rodriguez Martinez, J. Hugo; Arriola Medellin, Alejandro M. [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2010-11-15

    The major features in the design of power plant conversion from fuel oil to coal, considering the new technical characteristics of fuel and his transportation to plant, equipment required to comply with Mexican environmental standards and additional requirements of auxiliaries are described. In addition, changes needed on power plant design were considered according to integrates CO{sub 2} capture plant alternatives. [Spanish] En este articulo se describen las caracteristicas principales en el diseno de la conversion de Centrales de combustoleo a carbon, considerando el nuevo combustible y su transporte hasta la central, los equipos requeridos para cumplir con las normas ambientales y los requerimientos adicionales de los servicios auxiliares. Adicionalmente, se lleva a cabo el analisis de los cambios requeridos en el diseno de la conversion considerando diferentes opciones para la integracion de una planta de captura de CO{sub 2}, la cual debera entregar este subproducto para su compresion y envio a su destino final para su almacenamiento.

  20. Ramon Rask võitleb põhimõtte pärast / Marian Männi

    Index Scriptorium Estoniae

    Männi, Marian

    2007-01-01

    Portreelugu Tartu Ülikooli õigusteaduskonna cum laude lõpetanud Ramon Raskist, tema kohtuvõitlusest ülikooliga; professionaalse tasuta õigusabi võimalustest tudengitele Paul Varuli advokaadibüroo poolt Eesti Üliõpilasliidu juures

  1. Bishop Ramon Despont and the Jews of the Kingdom of Valencia

    Directory of Open Access Journals (Sweden)

    Meyerson, Mark D.

    1999-12-01

    Full Text Available This article treats the intervention of Bishop Ramon Despont (1289-1312 in the affairs of the Jews of the kingdom of Valencia. It deals mainly with his efforts to put an end to Jewish usury and with the effects of his initiatives on Christian-Jewish relations.[fr] Cet article traite de l'intervention de l'évêque Ramon Despont (1289-1312 dans les affaires des juifs du royaume de Valence. Il s'occupe principalement des efforts de cet évêque pour mettre tin à l'usure juive et des conséquences de ses initiatives sur les relations entre chrétiens et juifs.

  2. In memoriam: Celso-Ramon Garcia, M.D. (1922–2004), reproductive medicine visionary

    OpenAIRE

    Strauss, Jerome F.; Mastroianni, Luigi

    2005-01-01

    This article traces the career of Celso-Ramon Garcia (1922–2004), noted physician, educator, and internationally renowned pioneer in the field of reproductive endocrinology. His work helped to formulate oral contraceptives used by millions of women throughout the world. Garcia's research collaborators included Gregory Pincus and John Rock, who together finalized the landmark clinical data needed to secure initial FDA approval for "the pill" in 1960. In addition to Garcia's monumental work in ...

  3. Control structures design for fossil power station units; Diseno de estructuras de control para unidades termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Palomares Gonzalez, Daniel; Ricano Castillo, Juan Manuel [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1989-12-31

    In this paper are designed an analyzed the control ties of a 300MW fossil unit at different operation levels. The design and analysis were developed on an operation range of 50% to 100% load. The main control ties were studied among which are the feedwater flow, the superheating zone temperatures and the generated output. The technique used for the design is the decomposition in singular values (DSV) of the plant transference matrix. This is a recent technique that permits finding the most important interactions among output-input variables, over a significative frequencies range for the transference matrix of the plant. For this purpose utilizes the control properties of the transference matrix, such as: control effort, output-input interaction and ruggedness with respect to uncertainties. The control structures obtained were tested in a digital model of a fossil plant unit. A comparison study of both structures (original and modified) showed enhancement in the performance of the power plant with modified structure. [Espanol] En este trabajo se disenan y analizan los lazos de control de una unidad termoelectrica de 300 MW, a diferentes niveles de operacion. El diseno y analisis se desarrollo sobre un rango de operacion de 50 a 100 por ciento de carga. Se estudiaron los principales lazos de control entre los que se encuentran el flujo de agua de alimentacion, las temperaturas de la zona de sobrecalentamiento y la potencia generada. La tecnica utilizada para el diseno es la descomposicion en valores singulares (DVS) de la matriz de transferencia de la planta. Esta es una tecnica reciente que permite encontrar las interacciones mas importantes entre variables entrada-salida, sobre un rango de frecuencias significativas para la matriz de transferencia de la planta. Utiliza para ello las propiedades de control de la matriz de transferencia, como son: esfuerzo de control, interaccion entrada-salida y robustez con respecto a incertidumbres. Las estructuras de control

  4. Digital viscosity controller for fossil power plants; Controlador digital de viscosidad para plantas termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Bautista B, Amberto; Ocampo P, Carlos; Gutierrez A, Ruben; Madinaveitia V, Miguel [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1989-12-31

    Upon the need of increasing the efficiency of the existing fossil power plants in Mexico, the Instrumentation and Control Department of the Instituto de Investigaciones Electricas (IIE) designed and built a viscosity controller to enhance the fuel oil heating process. The system strategy, that allows the control either by temperature or viscosity considers, as an important element, the changing characteristics of the supplied fuels. The equipment that is utilized forms apart of the line Acquisition and Control System (ACS) developed at the same Institute, that has been successfully applied in other systems. [Espanol] Ante la necesidad de aumentar la eficiencia de las plantas termoelectricas existentes en Mexico, el Departamento de Instrumentacion y Control, del Instituto de Investigaciones Electricas (IIE), diseno y construyo un controlador de viscosidad para mejorar el proceso de calentamiento del aceite combustible. La estrategia del sistema, que permite controlar ya sea por viscosidad o por temperatura, considera como elemento importante las caracteristicas cambiantes de los combustibles suministrados. El equipo que se utiliza forma parte de la linea SAC (sistema de adquisicion y control), desarrollada en el mismo Instituto, que se ha aplicado satisfactoriamente en otros sistemas.

  5. El nombre de Ramon Fernandez: Notas sobre ecología de la cultura

    OpenAIRE

    Lastra, Antonio

    2011-01-01

    El propósito de estas notas consiste en examinar la cultura a la luz de las ideas de producción y de orden y mediante las figuras diversas que adopta su productor. El caso de Ramon Fernandez proporciona el ejemplo que la argumentación requiere, como lo demuestra que Walter Benjamin y Wallace Stevens lo citaran en un momento significativo de su obra. These notes deal with the examination of culture in the light of the ideas of production and order, and through the several figures of i...

  6. 78 FR 37793 - In the Matter of: Jose Arturo Ramon-Herrada, Inmate Number #90903-279, CI Willacy County...

    Science.gov (United States)

    2013-06-24

    ... most recent being that of August 15, 2012 (77 FR 49699 (August 16, 2012)), has continued the... Bureau of Industry and Security In the Matter of: Jose Arturo Ramon-Herrada, Inmate Number 90903-279, CI...-Herrada, with a last known address at: Inmate Number 90903-279, CI Willacy County,...

  7. Arquitectura y urbanismo en la conturbación barcelonesa. Ramon Puig Gairalt arquitecto municipal de l'Hospitalet de Llobregat (1912-1937)

    OpenAIRE

    Vidal i Jansà, Mercè

    2013-01-01

    [spa]En este artículo planteamos que significaron los trabajos de los arquitectos Ramon y Antoni Puig Gairalt, que abarcan desde la primera década del siglo XX hasta el año 1937 y que aún perviven en muchas de las localidades del territorio catalán donde intervinieron. Hablamos en plural de los Puig Gairalt porque fueron dos hermanos, Ramon y Antoni, aunque en L'Hospitalet de Llobregat las intervencions corresponden mayoritariamente a Ramon Puig Gairalt. En la actualidad muchas de las obras p...

  8. Carbon, oxygen and sulfur isotope studies of hydrothermal mineralization in the Gavnunim valley, Makhtesh Ramon, Israel

    International Nuclear Information System (INIS)

    Quartz and sulfide mineral from polymetallic vein-type mineralization within the quartz syenites of the Gavnunim valley, Makhtesh Ramon, exhibit isotopic composition quite different from the hypothermal ore occurrence. Quartz samples have δ18O in the range 19.2 to 25.3 per mille and the δ34S of sulfides varies from 17.5 to -30.6 per mille. At mineral deposition temperatures of 200-350 degree Celsius this compositional ranges are strongly indicative of isotopic buffering of the fluids by sediments in contact with the intrusive rocks. The distribution of δ13C and δ18O in secondary carbonates is consistent with epigenetic remobilization. The mineralization phenomena in the Gavnunim valley are constraint to the later stages of magmatic activity, when circulating hypothermal fluids moving through the sediments infiltrated fractures within the roof of the igneous body and deposited primary sulfide and gangue minerals. (author)

  9. Intelligent support system online for the operation of fossil fuel units; Sistema inteligente de ayuda en linea para la operacion de unidades termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Quintero R, Agustin; Suarez C, Dionisio A; Sanchez L, Jose Alfredo [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2006-07-01

    The purpose of this publication is to present a support system online for the operation (SAO) of fossil fuel units, having as objective to support the operator of fossil fuel units when handling guidelines and essential information to carry out the starting and shutdown in a safe and efficient way, reducing the consumption of the useful life of the steam generator and the turbine, as well as the operational cost. Here are presented the intelligent systems for the support of the operation and are described the main characteristics in the dominion of application for the support system, its architecture and functionality, as well as the results obtained in the system assessment performed with the aid of total reach simulator of a fossil fuel unit and a pilot unit. [Spanish] Es motivo de esta publicacion, la presentacion de un sistema de ayuda en linea para la operacion (SAO) de unidades termoelectricas que tiene como objetivo asistir al operador de una unidad termoelectrica con guias de manejo e informacion esencial para llevar a cabo el arranque o paro en forma segura y eficiente, reducir el consumo de vida util del generador de vapor y la turbina, asi como el costo de operacion. Aqui se presentan los sistemas inteligentes de ayuda a la operacion y se describen las caracteristicas principales del dominio de aplicacion para el sistema de ayuda, su arquitectura y funcionalidad, asi como los resultados obtenidos de la evaluacion del sistema realizada con la ayuda de un simulador de alcance total de una unidad termoelectrica y una unidad piloto.

  10. Current status of the Colombia power plants emissions; Estado de las emisiones en las centrales termoelectricas de Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Quijano Hurtado, Ricardo [Ministerio de Minas y Energia, (Colombia)

    1996-12-31

    The characteristics of the Colombian thermal electric resource and the environmental characteristics of the region such as: the climate where the power plants are located; the Geology and the type of soils; the technology employed for the atmospheric emissions control; the water consumption in the region; the systems for ash extraction an social-economical aspects are described [Espanol] Se describen las caracteristicas del parque termico de Colombia y las caracteristicas ambientales de la region como son: el clima donde estan localizadas las plantas; la geologia y los tipos de suelos; la tecnologia utilizada en el control de las emisiones atmosfericas; el consumo de agua en la region; los sistemas de extraccion de cenizas y aspectos socioeconomicos

  11. Technical study of the CO{sub 2} capture process with monoethanolamine for a thermoelectric plant; Estudio tecnico del proceso de captura de CO{sub 2} con monoetanolamina para una planta termoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Diaz, Abigail; Franco Nava, Jose Manuel; Peralta Martinez, Maria Vita; Gonzalez Santalo, Jose Miguel [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Franco Lopez, Rogelio; Carreon Silva, Ramon [Comision Federal de Electricidad (Mexico)

    2010-07-01

    planta termoelectrica de 350 MW, que utilizaria carbon como combustible, en el simulador de procesos ASPEN HYSYS. Para este proceso se requieren dos columnas: una de absorcion, en la cual entran los gases y el solvente, que en este caso fue una solucion de monoetanolamina (MEA) al 30%. La MEA reacciona con el CO{sub 2} contenido en los gases, reteniendolo, de manera que los gases restantes que son emitidos al ambiente, ya no lo contienen. La MEA y el CO{sub 2} capturado pasan a la segunda columna donde estos dos componentes se separan, utilizando energia termica para regenerar la MEA liberando el CO{sub 2}. El CO{sub 2} liberado sale por la parte superior de la columna y la MEA recuperada, que es reutilizada en la columna de absorcion, por el fondo. La concentracion de CO{sub 2} en los gases de la combustion es de 14.54% volumen. La simulacion se realizo definiendo una eficiencia de captura de 90%, lo que arrojo un consumo de energia termica para regenerar la MEA de 4.75 GJt/ton CO{sub 2}, que seria suministrada por la central termoelectrica. Considerando una capacidad de gases a tratar de 280 ton/h (por tren) se determino la altura de las columnas de absorcion y desercion, asi como el flujo de solucion de MEA.

  12. Adjustable control in the steam zone of a steam power plant; Control ajustable de la zona de vapor de una unidad termoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez Gallegos, Joaquin; Bourguet Diaz, Rafael Ernesto [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    A general description is presented of self adjustable control systems, as well as of the design and its application for steam temperature regulation of a steam power plant unit model. The algorithm employed is a controller of minimum variance that ponders the output deviation as well as the control effort. The results are compared with the ones obtained in a conventional control scheme, showing in general a better performance in the conducted experiments. [Espanol] Se presenta una descripcion general de los sistemas de control autoajustable, asi como del diseno y su aplicacion para regular las temperaturas de vapor de un modelo de unidad termoelectrica. El algoritmo utilizado es un controlador de variancia minima que pondera tanto la desviacion de salida como el esfuerzo de control. Los resultados se comparan con los obtenidos en un esquema de control convencional, mostrando en general un mejor desempeno en los experimentos realizados.

  13. Visioon Eestist / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2006-01-01

    Autor leiab, et Eestis tuleb presidendivalimiste eel vastutustundlikult arutleda sisuliste väärtuste ja visioonide, mitte aga võimalike hääletuskombinatsioonide üle. Presidendikandidaatide mõtete baasil on võimalik kujundada ühiskonnale humanistlik ja tasakaalustatud visioon, millest tulevane president oma töös võiks lähtuda

  14. System of aid for the starting of the steam generator of a thermoelectric unit; Sistema de ayuda para el arranque del generador de vapor de una unidad termoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Quintero R, Agustin; Suarez C, Dionisio A; Aquino E, Juan C; Diaz H, Carlos A; Cruz T, Jorge A; Sanchez L, Jose A [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2002-07-01

    This article presents the development of an on line aid system, whose objective is to aid the operator of a thermoelectric unit, providing the information that is required to carry out the heating and pressurization of the steam generator in the shortest possible time. The former takes place respecting the operation limits determined by the manufacturer and the conditions of security established to carry out the maneuvers of operation of the equipment. The system incorporates a scheme of predictive control, based on a neuronal model that estimates the optimal position of two final elements of control to fulfill with the curves of reference for the temperature and pressure of the main steam. The system is based on an architecture client-server and uses technology Web for the access of the information through a navigator of the Internet. [Spanish] Este articulo presenta el desarrollo de un sistema de ayuda en linea, cuyo objetivo es asistir al operador de una unidad termoelectrica, proporcionando la informacion que requiere para llevar a cabo el calentamiento y presurizacion del generador de vapor en el menor tiempo posible. Lo anterior se efectua respetando los limites de operacion determinados por el fabricante y las condiciones de seguridad establecidas para efectuar las maniobras de operacion de los equipos. El sistema incorpora un esquema de control predictivo, basado en un modelo neuronal, que estima la posicion optima de dos elementos finales de control para cumplir con las curvas de referencia para la temperatura y presion del vapor principal. El sistema esta basado en una arquitectura cliente-servidor y utiliza tecnologia Web para el acceso a la informacion a traves de un navegador del Internet.

  15. Gaussian plume model for the SO{sub 2} in a thermoelectric power plant; Modelo de pluma gaussiano para el SO{sub 2} en una central termoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Reyes L, C.; Munoz Ledo, C. R. [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1992-12-31

    The Gaussian Plume Model is an analytical extension to simulate the dispersion of the SO{sub 2} concentration at ground level as a function of the emission changes in the spot sources, as well as the pollutant dispersion in the Wind Rose, when the necessary parameters are fed. The model was elaborated in a personal computer and the results produced are generated in text form. [Espanol] El modelo de pluma gaussiano es una extension analitica para simular la dispersion de las concentraciones de SO{sub 2} a nivel del piso en funcion de los cambios de las emisiones en las fuentes puntuales, asi como, la dispersion del contaminante en la rosa de los vientos cuando se le alimentan los parametros necesarios. El modelo fue elaborado en una computadora personal y los resultados que proporciona los genera en modo texto.

  16. "En la boca de las nubes" (A la boca dels núvols y con los pies en el suelo. Ramon Vinyes: contra la literatura, la vida

    Directory of Open Access Journals (Sweden)

    Jordi Marrugat i Doménech

    2005-01-01

    Full Text Available Este artículo propone una lectura unitaria del volumen de narraciones de Ramon Vinyes En la boca de las nubes (1946. Además, va a las fuentes de las cuales surge la estética del libro —la narrativa catalana y europea de los años 20-30 y el pensamiento teórico de Vinyes— para explicar como el autor decadentista de La ardiente cabalgata (1909 acaba por escribir un libro tan alejado de los posicionamientos que había mantenido durante el Modernismo. Y es que si en 1909 Vinyes decantaba la balanza de la dicotomía artevida hacia el primero de estos términos, en 1946, después de haber vivido una guerra civil y dos guerras mundiales, la decanta radicamente hacia el segundo. Así, el lector podrá encontrar sugestivas comparaciones entre Vinyes y escritores como T. Gautier, Villiers de l’Isle-Adam, Gabriele d’Annunzio o Gabriel Alomar por lo que se refiere a su época modernista; entre Vinyes y Malraux, Saint-Exupéry, V. Woolf, Joan Oliver o Salvador Espriu, por lo que se refiere a los años 30; y entre Vinyes i Pere Calders o Lluís Ferran de Pol, por lo que se refiere al exilio

  17. Sotsiaalliberaalid plagieerivad Keskerakonda / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2004-01-01

    Eesti Keskerakonnast eraldunud sotsiaalliberaalide saadikurühma poliitilise manifesti analüüs. Autori hinnangul on enamus nende seisukohti Keskerakonna programmilised seisukohad ümbersõnastatud kujul

  18. Chemical processes of coal for use in power plants. Part 1: Approximate analysis and associated indexes of pulverized coal; Procesos quimicos del carbon para su uso en centrales termoelectricas. Parte 1: Analisis aproximado e indices asociados del carbon pulverizado

    Energy Technology Data Exchange (ETDEWEB)

    Altamirano-Bedolla, J. A.; Manzanares-Papayanopoulos, E.; Herrera-Velarde, J. R. [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)]. E-mail: emp@iie.org.mx

    2010-11-15

    The usage of hydrocarbons, such as natural gas, oil products and coal, will be the main source of energy to the mankind for next generations. Therefore, the actual research and technological developments point out to employ with high efficiency those fuels. The main interests are to release most of the energy as possible and to guide the combustion reactions. It is well known that during the combustion process of coal, the chemical energy is converted to thermal energy, which it allows the steam production, and therefore to produce energy through an electric generator. The main interest of the work presented here is to study the behavior of the coal combustion processes in function of the approximate analysis and some associate indices of that analysis, to point out the optimization of the coal usage as main fuel in electrical power generation plants. [Spanish] El uso de hidrocarburos como son el gas natural, los derivados del petroleo y el carbon mineral, continuara siendo en las proximas decadas la principal fuente de energia de la humanidad. Por consiguiente, la investigacion cientifica y los desarrollos tecnologicos actualmente se enfocan en emplear de manera mas eficiente dichos combustibles, satisfaciendo entre otros factores, dos intereses principales: liberar la mayor cantidad de energia, reduciendo al minimo el material combustible no quemado, y direccionar las reacciones del proceso de combustion para minimizar la cantidad de productos no deseados resultantes de la reaccion. A traves de los procesos quimicos de combustion del carbon, se transforma la energia quimica a energia termica, lo que permite la produccion de vapor para a su vez impulsar una turbina la cual esta acoplada a un generador electrico. El objetivo del presente trabajo es el estudio del comportamiento de los procesos quimicos que se llevan a cabo durante las reacciones de combus-tion del carbon en funcion del analisis aproximado y de los indices asociados resultantes de dicho analisis; lo cual permitira la optimizacion del uso del carbon como materia prima para la generacion de energia electrica.

  19. Prefeasibility of the project for repowering the Nachi Cocom thermal station in Merida, Yucatan state; Prefactibilidad del proyecto de repotenciacion de la central termoelectrica de Nachi- Cocom, en Merida estado de Yucatan

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Perez, J.L. [Comision Federal de Electricidad (CFE) (Mexico)

    1995-12-31

    This paper presents an alternative to the solution of the more efficient use of energy and for the solution on environmental pollution at a reduced cost, satisfying the electric energy demand with additional capacity three times as much greater than the installed capacity and utilizing evaluation of projects techniques for the prefeasibility analysis of the project. The investment for this type of projects results are feasible and attractive because of the short amortization term. The summary of results is given in Table 4. [Espanol] El presenta trabajo da una alternativa de solucion al uso mas eficiente de la energia y solucion a los problemas de contaminacion ambiental a un costo reducido, satisfaciendo la demanda de energia electrica con capacidad adicional de tres veces mayor a la capacidad instalada. Empleando tecnicas de evaluacion de proyectos para analisis de la prefactibilidad del proyecto. La inversion para este tipo de proyectos resulta factible y atractiva por el corto tiempo de amortizacion. El resumen de los resultados se muestra en la tabla 4.

  20. Fault diagnosis in the steam generator of a thermoelectric power plant using Petri networks; Diagnostico de fallas en el generador de vapor de una termoelectrica usando redes de Petri

    Energy Technology Data Exchange (ETDEWEB)

    Suarez Cerda, Dionisio A; Sanchez Lopez, Alfredo [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Martinez Prieto, Jose E; Garcia Beltran, Carlos D. [Centro Nacional de Investigacion y Desarrollo Tecnologico, Cuernavaca, Morelos (Mexico)

    2007-07-01

    , disponibilidad, eficiencia, seguridad y continuidad de la operacion, las cuales afectan gravemente los indices de desempeno del sistema. En este articulo se presenta un esquema de diagnostico de fallas, aplicado al generador de vapor de una unidad termoelectrica, basado en tecnicas de modelado de sistemas dinamicos mediante redes de Petri. Frente a otros metodos, el esquema ofrece mayor facilidad para su implementacion, rapidez de adaptacion ante cambios de zona de operacion y buena robustez. Una manera de reducir el efecto de las fallas en un sistema de produccion, consiste de dos pasos. El primero es diagnosticar la falla tan pronto como ocurra y subsecuentemente poner en practica acciones correctivas. El concepto de diagnostico de fallas se relaciona con la primera etapa y comprende tanto la deteccion, como la localizacion de esta. Es decir, ademas de determinar que una falla esta presente, se sabe en que componente ha ocurrido. Con base en lo anterior, es claro que un sistema de diagnostico requiere supervisar las variables que caracterizan el comportamiento de las fallas, a fin de detectarlas en el momento en que se presenten e informarlo al operador. Con esta informacion, el operador podra realizar las acciones correctivas necesarias para que la planta siga operando en la medida de lo posible.

  1. Multicenter study in monitoring central venous catheters complications in hematologic patiennts

    Directory of Open Access Journals (Sweden)

    Carmen García Gabás

    2013-05-01

    Full Text Available Most hematological patients suffer a significant venous damage related to different administrated intravenous therapy, being necessary to place central venous catheters (CVC. CVC is associated with various complications. The most common catheter-related complications are occlusion and infection. To avoid such of them, the development of protocols for insertion and care are needed, as well as recording and following up complications. To this end, we propose a cross-sectional carried out during 13 months whose main goal is to know the incidence of CVC- related complications (mainly occlusion and infection in hematological patients.Population included all the =14 ages patients admitted to different hematological units at Ramon y Cajal and Gregorio Marañón hospitals in Madrid and who signed informed consent. Socio-demographic, clinical characteristics and complications were entered into a log which included a pursuit of care protocol.

  2. Nädal Riigikogus / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2003-01-01

    Järg 7.,14.,21. mai, 4.,11.,18. juuni, 24.september, 1.,15.,22.,29. oktoober, 12.,19.,26. november, 10.,17.,24. detsember, 5.,21.,28. jaanuar 2004. a., 4.,18., 25. veebruar, 3.,17.,24. märts, 21., 28. aprill, 12., 19., 26. mai, 9.,16. juuni, 22.,29. sept. lk. 5. Riigikogu töö tutvustus

  3. 21. sajandi alguse julgeolekudilemmadest / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2006-01-01

    21. sajandi alguse julgeolekuküsimused: riikidevahelised asümmeetrilised konfliktid, rünnakuohud, tuumaterrori oht, rahvusvaheline terrorism, võitlus selle vastu, Euroopast lähtuv terrorioht. Euroopa Liidu riikide ja USA vaheliste erimeelsuste allikatest julgeoleku küsimustes

  4. Eesti vajab vasakpoolsemat valitsust / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2005-01-01

    Autori sõnul valitseb Eestis peamiselt odavale allhankele orienteeritud ultraliberaalne mõtteviis, mis ei pööra inimkapitali arengule piisavat ja pidevat tähelepanu ning on kaugel euroopalikust ühiskonnamudelist

  5. Eesti Euroopas ja Euroopa Eestis / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2005-01-01

    Autor annab ülevaate, milliseid uudiseid on välisajakirjandus Eesti kohta avaldanud, millised on lähiaastatel EL-i ees seisvad probleemid, kuhu läheb lõviosa EL-i maksumaksja rahast. Autori sõnul on Eesti sattunud nn. musta nimekirja Euroopa sotsiaalharta rikkumise pärast

  6. Euroopa Liit ja Eesti erakonnad / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2005-01-01

    Autor arutleb, millised muutused on toimumas lähiajal Eesti erakondadega seoses Eesti liitumisega Euroopa Liiduga ja nendib, et juba praegu võib täheldada Eesti erakondade järkjärgulist üleminekut senistelt isikupõhistelt koalitsioonidelt suurema ideoloogilise konsolideerumise suunas

  7. Hoidkem Eesti õigel kursil! / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2007-01-01

    Järg 30. jaan. lk. 7, 9. veebr. lk. 7. Eestis tuleks välja arendada rahvuslik teadmistepõhine innovatsioonisüsteem. Tootlikkuse suurendamiseks tuleks enam panustada uutesse tehnoloogiatesse ja efektiivsematesse töömeetoditesse. Samuti tuleks luua sotsiaalne ja regionaalne tasakaal

  8. Analysis of the problems of induced draft fans in a carbo-electric power station; Analisis de la problematica de ventiladores de tiro inducido de una central carboelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Diaz Sanchez, Valentin de Jesus; Vital Flores, Francisco [LAPEM, Comision Federal de Electricidad (Mexico)

    2007-11-15

    The induced draft fans of the 350 MW units of a Thermo-electric power plant presented problems consisting of the failure of the capacity of gases extraction, together with the presence of cracks in the blades; this condition was observed since the stage of putting into service. Consequently, losses have been originated in the availability in two units, as well as, losses due to the manufacture of new impellers, which also originated that, in some cases, that the measures of the impellers, locally manufactured, differed from the originals, resulting in differences in the unit's efficiency. [Spanish] Los ventiladores tiro inducido de las unidades de 350 MW de una Central Termoelectrica presentaban una problematica consistente en la falla de capacidad de extraccion de gases, aunado a la presencia de fracturas en las aspas de los impulsores, esta condicion se observo desde la etapa de puesta en servicio. En consecuencia se han ocasionado perdidas de disponibilidad en dos unidades, asi como tambien, perdidas debido a la fabricacion de nuevos impulsores, lo que tambien origino que, en algunos casos, las medidas de los impulsores, fabricados localmente, diferian de los originales, dando como resultado diferencias en la eficiencia de las unidades.

  9. Training simulators for power plant operation based in multimedia, intelligent tutorials and virtual reality; Simuladores para entrenamiento en la operacion de centrales basados en multimedia, tutores inteligentes y realidad virtual

    Energy Technology Data Exchange (ETDEWEB)

    Rossano Roman, Miguel; Tavira Mondragon, Jose A.; Romero Jimenez, Guillermo; Buenabad Arias, Maria de los Angeles [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1997-12-31

    The possibility of utilizing simulators to support the fossil fuel power plants operation personnel training, is analyzed. These simulators can be based in multimedia, intelligent tutorials and virtual reality. The software and hardware advances of these technologies are analyzed and it is concluded that the simulators development for operators training supported in the fore mentioned technologies represents a new alternative for the instruction of personnel of this type of power stations that has to be analyzed and evaluated, since one of the disadvantages of this type of technologies is the equipment and software investment cost [Espanol] Se analiza la posibilidad de utilizar simuladores para ayudar al entrenamiento del personal en la operacion de centrales termoelectricas, dichos simuladores pueden estar basados en multimedia, tutores inteligentes y realidad virtual. Se describen los avances en software y hardware de estas tecnologias y se concluye en que el desarrollo de simuladores para el entrenamiento de operadores apoyados con las tecnologias antes mencionadas representa una nueva alternativa para la instruccion del personal de este tipo de centrales, que hay que analizar y evaluar, ya que una de las desventajas de este tipo de tecnologias es el costo de inversion en equipo y software

  10. Europa central

    Directory of Open Access Journals (Sweden)

    Karel BARTOSEK

    2010-02-01

    Full Text Available La investigación francesa continúa interesándose por Europa Central. Desde luego, hay límites a este interés en el ambiente general de mi nueva patria: en la ignorancia, producto del largo desinterés de Francia por este espacio después de la Segunda Guerra Mundial, y en el comportamiento y la reflexión de la clase política y de los medios de comunicación (una anécdota para ilustrar este ambiente: durante la preparación de nuestro coloquio «Refugiados e inmigrantes de Europa Central en el movimiento antifascista y la Resistencia en Francia, 1933-1945», celebrado en París en octubre de 1986, el problema de la definición fue planteado concreta y «prácticamente». ¡Y hubo entonces un historiador eminente, para quién Alemania no formaría parte de Europa Central!.

  11. Rehabilitation and extension of the useful operating life of a high pressure casing of the 75 MW steam turbine of the thermoelectric power plant President Juarez in Rosarito, B.C.; Rehabilitacion y extension de vida util de una carcasa de alta presion de la turbina de vapor de 75 MW de la central termoelectrica Presidente Juarez en Rosarito, B.C.

    Energy Technology Data Exchange (ETDEWEB)

    Mazur C, Zdzislaw; Hernandez R, Alejandro; Luna R, Alberto [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Fernandez, Rafael; Nieblas, Enrique [Comision Federal de Electricidad, Rosarito, Baja California (Mexico)

    2004-07-01

    The effective operation of the steam turbines is important to the world industries, but as all machinery, it is necessary to constantly examine and give maintenance to this equipment with the purpose of producing better results. Yet, many steam turbines arrive at an operation period of 30 or 40 years, over their original design capacity. A factor like this, only augments the probabilities of future problems with the casings, such as: thermal fatigue fissures, deformation of the horizontal union and erosion problems in the low pressure housings. The deformation of the casing can affect its capacity to maintain aligned the stationary parts of the turbine, as a consequence, damages can appear in the fixed and rotary components by interference or friction. Also, the water induction can deform the casing to such a degree that, the alignment of the stationary parts is altered until it causes contact and friction between stationary and rotary parts. However, depending on the type and degree of the casing deformation, different methods of rehabilitation can be applied. The core goal is to recover the planarity of the union of the flanges, re-machining the plane of the flange of the upper and lower casing or, alternatively, to carry out a scraping by hand. [Spanish] El funcionamiento eficaz de las turbinas de vapor es importante para las industrias del mundo, pero como toda maquinaria, es necesario examinar y dar mantenimiento constantemente a este equipo con la finalidad de producir mejores resultados. Con todo, muchas turbinas de vapor llegan a un periodo de operacion de 30 o 40 anos, por encima de su capacidad de diseno original. Un factor como este, solo eleva las probabilidades de futuros problemas con las carcasas, tales como: fisuras por fatiga termica, deformacion de la union horizontal y problemas de erosion en las carcasas de baja presion. La deformacion de la carcasa puede afectar su capacidad para mantener alineadas las partes estacionarias de la turbina, como consecuencia, pueden presentarse danos en los componentes fijos y rotatorios por interferencia o rozamiento. Asimismo, la induccion de agua puede deformar la carcasa a tal grado que, la alineacion de las partes estacionarias se altera hasta provoca contacto y rozamiento entre partes estacionarias y rotatorias. Ahora bien, dependiendo del tipo y grado de la deformacion de la carcasa, se pueden aplicar diferentes metodos de rehabilitacion. Lo medular es restaurarla planicidad de la union de las bridas, remaquinando el plano de la brida de la carcasa inferior y superior o, alternativamente, llevar a cabo un escrapeado manual.

  12. Central Pain Syndrome

    Science.gov (United States)

    ... Enhancing Diversity Find People About NINDS NINDS Central Pain Syndrome Information Page Table of Contents (click to ... being done? Clinical Trials Organizations What is Central Pain Syndrome? Central pain syndrome is a neurological condition ...

  13. Ramon Vinyes o la fecunda irreverencia. De Barcelona a Barranquilla

    OpenAIRE

    Jacques Gilard

    2005-01-01

    El presente trabajo es un ensayo del académico francés Jacques Gilard, que reflexiona en torno a la vida y la obra de Ramón Vinyes. No se puede olvidar que el fue la persona, que allá por los años ochenta, rescató del olvido, la obra del escritor catalán.

  14. Europarlament suurendab oma mõjujõudu / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2004-01-01

    Autori hinnangul andis Euroopa Parlamendi edukas vastuseis Rocco Buttiglione nimetamisele Euroopa Komisjoni volinikuks tunnistust parlamendi mõjujõu kasvust. Siiri Oviiri ja liberaalide fraktsiooni seisukohtadest Buttiglione küsimuses

  15. Siiri Oviir osales Euroopa Naise valimiskogus / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2004-01-01

    Euroopa Parlamendi liikme Siiri Oviiri osalemisest Rahvusvahelise Euroopa Naiste Assotsiatsiooni (AIPFE) valimiskogus 13. oktoobril 2004, kus nimetati Euroopa Naine 2004 kandidaadiks kreeklanna Aliki Moschi-Gauget

  16. Kriminaalvastutus juriidilise isiku jagunemisel / Ramon Rask, Marko Kairjak

    Index Scriptorium Estoniae

    Rask, Ramon

    2009-01-01

    Jagunemise tsiviilõiguslikust regulatsioonist (ÄS § 434), juriidilise isiku karistusõigusliku vastutuse eesmärkidest (KarS § 44 lg 8 - rahaline karistus, § 46 - sundlõpetamine, § 55 - riigisaladuse ja salastatud välisteabe töötlemise õiguse või loomapidamise õiguse äravõtmine), juriidilise isiku karistusõiguslikust vastutusest jagunemisel (ühinguidentiteet, vastutus eraldumise või jaotumise korral)

  17. To centralize or not to centralize?

    OpenAIRE

    Campbell, Andrew; Kunisch, Sven; Müller-Stewens, Günter

    2011-01-01

    The CEO's dilemma-were the gains of centralization worth the pain it could cause?-is a perennial one. Business leaders dating back at least to Alfred Sloan, who laid out GM's influential philosophy of decentralization in a series of memos during the 1920s, have recognized that badly judged centralization can stifle initiative, constrain the ability to tailor products and services locally, and burden business divisions with high costs and poor service.1 Insufficient centralization can deny bus...

  18. Central Neuropathic Pain Syndromes.

    Science.gov (United States)

    Watson, James C; Sandroni, Paola

    2016-03-01

    Chronic pain is common in patients with neurologic complications of a central nervous system insult such as stroke. The pain is most commonly musculoskeletal or related to obligatory overuse of neurologically unaffected limbs. However, neuropathic pain can result directly from the central nervous system injury. Impaired sensory discrimination can make it challenging to differentiate central neuropathic pain from other pain types or spasticity. Central neuropathic pain may also begin months to years after the injury, further obscuring recognition of its association with a past neurologic injury. This review focuses on unique clinical features that help distinguish central neuropathic pain. The most common clinical central pain syndromes-central poststroke pain, multiple sclerosis-related pain, and spinal cord injury-related pain-are reviewed in detail. Recent progress in understanding of the pathogenesis of central neuropathic pain is reviewed, and pharmacological, surgical, and neuromodulatory treatments of this notoriously difficult to treat pain syndrome are discussed. PMID:26944242

  19. NIDDK Central Repository

    Data.gov (United States)

    U.S. Department of Health & Human Services — The NIDDK Central Repository stores biosamples, genetic and other data collected in designated NIDDK-funded clinical studies. The purpose of the NIDDK Central...

  20. Central and peripheral demyelination

    OpenAIRE

    Man Mohan Mehndiratta; Natasha Singh Gulati

    2014-01-01

    Several conditions cause damage to the inherently normal myelin of central nervous system, perepheral nervous system or both central and perepheral nervous system and hence termed as central demyelinating diseases, perepheral demyelinating diseases and combined central and perepheral demyelinating diseases respectively. Here we analysed and foccused on the etiology, prevalance, incidence and age of these demyelinating disorders. Clinical attention and various diagnostic tests are needed to ad...

  1. CENTRAL ASIA'S POWER DILEMMAS

    OpenAIRE

    Budkin, Viktor

    2006-01-01

    It turned out to be much harder to create new power structures in Central Asia than elsewhere in the post-socialist world: no matter how hard it was for the Central European countries to acquire new political institutions, their advance toward the Western democratic model was much smoother. In the European part of the post-Soviet geopolitical expanse, Russia, Ukraine, and Moldova experienced fewer problems than the Central Asian region (CAR for short), though they too had their share of contr...

  2. Central Laboratories Services

    Data.gov (United States)

    Federal Laboratory Consortium — The TVA Central Laboratories Services is a comprehensive technical support center, offering you a complete range of scientific, engineering, and technical services....

  3. Central centrifugal cicatricial alopecia

    OpenAIRE

    Collin Blattner; Dennis C Polley; Frank Ferritto; Elston, Dirk M

    2013-01-01

    Central centrifugal cicatricial alopecia is a common cause of progressive permanent apical alopecia. This unique form of alopecia includes entities previously know as “hot comb alopecia,” “follicular degeneration syndrome,” “pseudopelade” in African Americans and “central elliptical pseudopelade” in Caucasians. The etiology appears to be multifactorial and the condition occurs in all races.

  4. Central pontine myelinolysis

    Science.gov (United States)

    ... from one nerve to another. The most common cause of central pontine myelinolysis is a quick change in the body's sodium ... The nerve damage caused by central pontine myelinolysis is usually ... The disorder can cause serious long-term (chronic) disability.

  5. Central Diffraction at ALICE

    CERN Document Server

    Lämsä, Jerry W

    2011-01-01

    The ALICE experiment is shown to be well suited for studies of exclusive final states from central diffractive reactions. The gluon-rich environment of the central system allows detailed QCD studies and searches for exotic meson states, such as glueballs, hybrids and new charmonium-like states. It would also provide a good testing ground for detailed studies of heavy quarkonia. Due to its central barrel performance, ALICE can accurately measure the low-mass central systems with good purity. The efficiency of the Forward Multiplicity Detector (FMD) and the Forward Shower Counter (FSC) system for detecting rapidity gaps is shown to be adequate for the proposed studies. With this detector arrangement, valuable new data can be obtained by tagging central diffractive processes.

  6. Central diffraction at ALICE

    Energy Technology Data Exchange (ETDEWEB)

    Laemsae, J W; Orava, R, E-mail: risto.orava@helsinki.fi [Helsinki Insitute of Physics, and Division of Elementary Particle Physics, Department of Physics, PL 64 (Gustaf Haellstroeminkatu 2a), FI-00014 University of Helsinki (Finland)

    2011-02-01

    The ALICE experiment is shown to be well suited for studies of exclusive final states from central diffractive reactions. The gluon-rich environment of the central system allows detailed QCD studies and searches for exotic meson states, such as glueballs, hybrids and new charmonium-like states. It would also provide a good testing ground for detailed studies of heavy quarkonia. Due to its central barrel performance, ALICE can accurately measure the low-mass central systems with good purity. The efficiency of the Forward Multiplicity Detector (FMD) and the Forward Shower Counter (FSC) system for detecting rapidity gaps is shown to be adequate for the proposed studies. With this detector arrangement, valuable new data can be obtained by tagging central diffractive processes.

  7. Central line infections - hospitals

    Science.gov (United States)

    ... risk is higher if you: Are in the intensive care unit (ICU) Have a weakened immune system or serious ... unless you have washed your hands. Tell your nurse if your central line: Gets dirty Is coming ...

  8. Central Data Exchange

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Central Data Exchange (CDX) enables fast, efficient and more accurate environmental data submissions from state and local governments, industry and tribes to...

  9. "Central Station" Londonis

    Index Scriptorium Estoniae

    2000-01-01

    Londoni galeriis Milch seitsme läti, leedu ja eesti kunstniku projekt "Central Station". Kuraatorid Lisa Panting, Sally Tallant. Eestist osalevad Hanno Soans (Catarina Campinoga koostöös valminud video), Kiwa, Kai Kaljo

  10. Central Asian Republic Info

    Data.gov (United States)

    US Agency for International Development — CAR Info is designed and managed by the Central Asian Republic Mission to fill in the knowledge and reporting gaps in existing agency systems for that Mission. It...

  11. Central nervous system

    Science.gov (United States)

    The central nervous system is composed of the brain and spinal cord. Your brain and spinal cord serve as the main "processing center" for your entire nervous system. They control all the workings of your body.

  12. Central nervous system resuscitation

    DEFF Research Database (Denmark)

    McIntosh, T K; Garde, E; Saatman, K E;

    1997-01-01

    Traumatic injury to the central nervous system induces delayed neuronal death, which may be mediated by acute and chronic neurochemical changes. Experimental identification of these injury mechanisms and elucidation of the neurochemical cascade following trauma may provide enhanced opportunities...

  13. Central Bank independence

    OpenAIRE

    Vasile DEDU; Tiberiu STOICA

    2012-01-01

    In this paper we present the key aspects regarding central bank’s independence. Most economists consider that the factor which positively influences the efficiency of monetary policy measures is the high independence of the central bank. We determined that the National Bank of Romania (NBR) has a high degree of independence. NBR has both goal and instrument independence. We also consider that the hike of NBR’s independence played an important role in the significant disin...

  14. EMT Central Offices

    OpenAIRE

    Campo Baeza, Alberto

    2001-01-01

    The brief was the construction of the Central Headquarters of the Municipal Transportation Company of Madrid (EMT) on a site edged by the train lines, near the Atocha train station. = Se trataba de la construcción de la sede central de la empresa EMT de Madrid, en un solar junto a las vías del tren cerca de la estación de Atocha.

  15. Centralization and political accountability

    OpenAIRE

    Hindriks, Jean; Lockwood, Ben

    2004-01-01

    In this paper we abstract from the usual gains and costs of decentralization (e.g. preference matching, spillovers and economies of scale). Instead we compare the political accountability of decentralized governments relative to centralized ones when there is a risk of "bad" governance. We study both the selection and incentive effects of accountability. A key aspect of centralization is to make the politician answerable to multiple constituencies subject to a common budget constraint. Our ma...

  16. SOCRATES Invades Central Europe

    OpenAIRE

    Joseph Slowinski

    1998-01-01

    The objective of this article is to explore the current reality faced by higher education students in Central and Eastern Europe and to draw out the implications of this current reality for policy makers in the future. In the article, I explore the influence of transnational corporations' training programs on education as it currently pertains to Central and Eastern European higher education and employment. In addition, multinational corporate entities exercise influence on European Union pol...

  17. Outsourcing central banking

    OpenAIRE

    Khoury, Sarkis Joseph; Wihlborg , Clas

    2005-01-01

    The literature on Currency Boards (CB) stops at the water edge in terms of dealing with the totality of the functions of a central bank. Monetary policy, and banking supervision can be "outsourced" in an open economy with substantial foreign direct investment (FDI) in the banking sector if political nationalism does not trump economic rationality. An orthodox CB renders the central banking function redundant in terms of interest rate and exchange rate determination. FDI in banking could...

  18. CENTRAL PLATEAU REMEDIATION

    Energy Technology Data Exchange (ETDEWEB)

    ROMINE, L.D.

    2006-02-01

    A systematic approach to closure planning is being implemented at the Hanford Site's Central Plateau to help achieve the goal of closure by the year 2035. The overall objective of Central Plateau remediation is to protect human health and the environment from the significant quantity of contaminated material that resulted from decades of plutonium production in support of the nation's defense. This goal will be achieved either by removing contaminants or placing the residual contaminated materials in a secure configuration that minimizes further migration to the groundwater and reduces the potential for inadvertent intrusion into contaminated sites. The approach to Central Plateau cleanup used three key concepts--closure zones, closure elements, and closure process steps--to create an organized picture of actions required to complete remediation. These actions were merged with logic ties, constraints, and required resources to produce an integrated time-phased schedule and cost profile for Central Plateau closure. Programmatic risks associated with implementation of Central Plateau closure were identified and analyzed. Actions to mitigate the most significant risks are underway while high priority remediation projects continue to make progress.

  19. CENTRAL PLATEAU REMEDIATION

    International Nuclear Information System (INIS)

    A systematic approach to closure planning is being implemented at the Hanford Site's Central Plateau to help achieve the goal of closure by the year 2035. The overall objective of Central Plateau remediation is to protect human health and the environment from the significant quantity of contaminated material that resulted from decades of plutonium production in support of the nation's defense. This goal will be achieved either by removing contaminants or placing the residual contaminated materials in a secure configuration that minimizes further migration to the groundwater and reduces the potential for inadvertent intrusion into contaminated sites. The approach to Central Plateau cleanup used three key concepts--closure zones, closure elements, and closure process steps--to create an organized picture of actions required to complete remediation. These actions were merged with logic ties, constraints, and required resources to produce an integrated time-phased schedule and cost profile for Central Plateau closure. Programmatic risks associated with implementation of Central Plateau closure were identified and analyzed. Actions to mitigate the most significant risks are underway while high priority remediation projects continue to make progress

  20. Colloquium on Central Asia

    International Nuclear Information System (INIS)

    This colloquium on Azerbaijan was organized by the direction of international relations of the French Senate and the French center of foreign trade (CFCE). This document gathers the interventions of the participants and the debates with the audience following these interventions. The topics treated concern: - the present day political-economical situation of Central Asia countries (problem of borders, relations with Russia and China); - the economies of Central Asia countries: short term problems and medium-term perspectives; - the relations with the European Union (political, economical, trade and investments, perspectives); - the European energy stakes of Caspian sea (oil and gas reserves, development of hydrocarbon resources, exploitation and transport constraints, stakes for Europe and France); - TotalFinaElf company in Central Asia (Kazakhstan, Azerbaijan, enclavement problem); - the economical impacts of the TRACECA pathway (Transport Corridor Europe Caucasus Asia). (J.S.)

  1. The Naive Central Banker

    Directory of Open Access Journals (Sweden)

    Marcelo de Carvalho Griebeler

    2015-09-01

    Full Text Available There has been in some countries a trend of assigning other functions to central banks besides price stability. The most suggested function to be added to monetary authority’s obligations is to pursue economic growth or full employment. In this paper we characterize the behavior and analyse the optimal monetary policy of, what we call, a naive central banker. We describe the naive behavior as one that does face the inflation-unemployment trade-off, but it tries to minimize both variables simultaneously. Our findings, both under discretion and commitment, indicate that the naive central banker delivers lower expected inflation and inflation variance than the benchmark behavior whenever the economy is rigid enough. However, the degree of conservativeness also affects this result, such that the less conservative the naive policymaker, the more rigidity is necessary.

  2. SOCRATES Invades Central Europe

    Directory of Open Access Journals (Sweden)

    Joseph Slowinski

    1998-04-01

    Full Text Available The objective of this article is to explore the current reality faced by higher education students in Central and Eastern Europe and to draw out the implications of this current reality for policy makers in the future. In the article, I explore the influence of transnational corporations' training programs on education as it currently pertains to Central and Eastern European higher education and employment. In addition, multinational corporate entities exercise influence on European Union policy through the role of lobby organizations and activities. I explore the influence of these practices on education with an emphasis on the emerging importance of Western language skills. In addition, I focus on the European Union and its efforts to expand into Central and Eastern Europe in order to provide a focal point for analysis.

  3. ORIC central region calculations

    International Nuclear Information System (INIS)

    The central region for the K = 100 Oak Ridge Isochronous Cyclotron, ORIC, will be modified to provide better orbit centering, focusing of orbits in the axial direction, and phase selection, in order to improve extraction efficiency, and reduce radioactive activation of cyclotron components. The central region is specifically designed for the acceleration of intense light ion beams such as 60 MeV protons and 15--100 MeV alphas. These beams will be used in the production of radioactive atoms in the Radioactive Ion Beam Project at Oak Ridge National Laboratory

  4. Hale Central Peak

    Science.gov (United States)

    2004-01-01

    19 September 2004 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows some of the mountains that make up the central peak region of Hale Crater, located near 35.8oS, 36.5oW. Dark, smooth-surfaced sand dunes are seen to be climbing up the mountainous slopes. The central peak of a crater consists of rock brought up during the impact from below the crater floor. This autumn image is illuminated from the upper left and covers an area approximately 3 km (1.9 mi) across.

  5. Channeling the Central Dogma.

    Science.gov (United States)

    Calabrese, Ronald L

    2014-05-21

    How do neurons and networks achieve their characteristic electrical activity, regulate this activity homeostatically, and yet show population variability in expression? In this issue of Neuron, O'Leary et al. (2014) address some of these thorny questions in this theoretical analysis that starts with the Central Dogma. PMID:24853932

  6. Central Dogma Goes Digital.

    Science.gov (United States)

    Lin, Yihan; Elowitz, Michael B

    2016-03-17

    In this issue of Molecular Cell, Tay and colleagues (Albayrak et al., 2016) describe a new technique to digitally quantify the numbers of protein and mRNA in the same mammalian cell, providing a new way to look at the central dogma of molecular biology. PMID:26990983

  7. Central areolar choroidal dystrophy.

    NARCIS (Netherlands)

    Boon, C.J.F.; Klevering, B.J.; Cremers, F.P.M.; Zonneveld-Vrieling, M.N.; Theelen, T.; Hollander, A.I. den; Hoyng, C.B.

    2009-01-01

    OBJECTIVE: To describe the clinical characteristics, follow-up data and molecular genetic background in a large group of patients with central areolar choroidal dystrophy (CACD). DESIGN: Retrospective case series study. PARTICIPANTS: One hundred three patients with CACD from the Netherlands. METHODS

  8. [Central manifestations of dystrophinopathies].

    Science.gov (United States)

    Cuisset, J-M; Rivier, F

    2015-12-01

    The dystrophin gene involved in Duchenne and Becker muscular dystrophy is expressed in three main tissues resulting in clinical manifestations: skeletal muscle, heart and central nervous system. The 6 different existing dystrophins in the brain may play a role in the maturation and plasticity of neuronal synapses in particular by their functions in clustering and stabilization of different receptors at the post synaptic membrane. The possibility of an intellectual deficiency in Duchenne muscular dystrophy is known from the original description by Duchenne himself. Current data are in line with a constant cognitive impairment with a Gaussian curve shifted intellectual quotient (IQ) at -1 standard deviation from the standard population with an average IQ around 80. Clinical manifestations suggestive of a central nervous system involvement can affect all dystrophinopathies, including isolated central presentations without myopathic sign. The phenotypic spectrum appears broader and more subtle than non specific intellectual deficiency. The isolated or shared involvement of specific cognitive functions is possible (memory functions, executive functions, attention) with or without intellectual deficiency. Autism spectrum disorders are also among the encountered events. In clinical practice, it seems worth to ask for a measurement of serum creatine kinase (CK) in these different situations, keeping in mind that pure forms of central dystrophinopathies with a normal CK level have been recently reported. PMID:26773588

  9. Retiring the central executive.

    Science.gov (United States)

    Logie, Robert H

    2016-10-01

    Reasoning, problem solving, comprehension, learning and retrieval, inhibition, switching, updating, or multitasking are often referred to as higher cognition, thought to require control processes or the use of a central executive. However, the concept of an executive controller begs the question of what is controlling the controller and so on, leading to an infinite hierarchy of executives or "homunculi". In what is now a QJEP citation classic, Baddeley [Baddeley, A. D. (1996). Exploring the central executive. Quarterly Journal of Experimental Psychology, 49A, 5-28] referred to the concept of a central executive in cognition as a "conceptual ragbag" that acted as a placeholder umbrella term for aspects of cognition that are complex, were poorly understood at the time, and most likely involve several different cognitive functions working in concert. He suggested that with systematic empirical research, advances in understanding might progress sufficiently to allow the executive concept to be "sacked". This article offers an overview of the 1996 article and of some subsequent systematic research and argues that after two decades of research, there is sufficient advance in understanding to suggest that executive control might arise from the interaction among multiple different functions in cognition that use different, but overlapping, brain networks. The article concludes that the central executive concept might now be offered a dignified retirement. PMID:26821744

  10. Centralizers of spin subalgebras

    Science.gov (United States)

    Arizmendi, Gerardo; Herrera, Rafael

    2015-11-01

    We determine the centralizers of certain isomorphic copies of spin subalgebras spin(r) in so(dr m), where dr is the dimension of a real irreducible representation of Clr0, the even Clifford algebra determined by the positive definite inner product on Rr, where r, m ∈ N.

  11. Outsourcing central banking

    DEFF Research Database (Denmark)

    Khoury, Sarkis Joseph; Wihlborg, Clas

    2005-01-01

    The literature on Currency Boards (CB) stops at the water edge in terms of dealing with the totality of the functions of a central bank. Monetary policy, and banking supervisioncan be "outsourced" in an open economy with substantial foreign direct investment (FDI)in the banking sector if politica...

  12. Central Station Design Options

    DEFF Research Database (Denmark)

    2011-01-01

    The purpose of EDISON Work Package 4.1 is the evaluation of possible Central (charging) Stations design options for making possible the public charging of Electric Vehicles (EVs). A number of scenarios for EVs are assessed, with special emphasis on the options of Fast Charging and Battery Swapping...... charging, rated at 50 kW, fast charging would be easier in both Denmark and Bornholm scenarios. For each scenario and charging power level, the possible number of EVs is estimated and finally architectural design options are proposed. Technical assessment is performed for evaluating the benefits.......g. due to vandalism, the charge supply circuit is disconnected. More electrical vehicles on the market are capable today of quick charging up to 50 kW power level. The feasibility of Central Stations with fast charging/swapping option, their capacity, design, costs and grid impact, as well as battery...

  13. Forward central jets correlations

    International Nuclear Information System (INIS)

    The azimuthal correlation between forward and central jets has been measured in pp collisions with the CMS detector at the LHC at the centre-of-mass energy of 7 TeV. The forward jet is required to be reconstructed in the hadronic forward calorimeter, within the pseudo-rapidity 3.2t>35 GeV. The measurement of the azimuthal angle between the jets is performed for different separations in pseudo-rapidity between the jets, with the largest separation being 7.5 units. The measurement is repeated for two subsamples of events, one in which an additional jet is required between the forward and the central jet, and one where the additional jet is vetoed. The measurement is compared to several different Monte Carlo models and tunes.

  14. Measuring Central Bank Communication:

    OpenAIRE

    David Lucca; Francesco Trebbi

    2008-01-01

    We present a new automated, objective and intuitive scoring method to measure the content of central bank communication about future policy rate moves. We apply the methodology to statements released by the Federal Open Market Commitee (FOMC) after monetary policy meetings. Using high-frequency financial data, we find that yields on short-term risk-free nominal rates respond both to changes in policy rates and the content of the statements, whereas, medium and long-term rates only respond to ...

  15. Central nervous system diseases

    International Nuclear Information System (INIS)

    It is shown that roentgenological examination plays an important role in diagnosis of central nervous system diseases in children. The methods of roentgenological examinations are divided into 3 groups: roentgenography without contrast media (conventional roentgenography), roentgenography with artificial contrasting of liquor space (ventriculopneumoencelography, myelography) and contrasting of brain and spinal blood vessels (angiography). Conventional contrastless roentgenography of skull and vertebral column occupies leadership in diagnosis of brain neoplasms and some vascular diseases

  16. Centrality Measures in Networks

    CERN Document Server

    Bloch, Francis; Tebaldi, Pietro

    2016-01-01

    We show that although the prominent centrality measures in network analysis make use of different information about nodes' positions, they all process that information in an identical way: they all spring from a common family that are characterized by the same simple axioms. In particular, they are all based on a monotonic and additively separable treatment of a statistic that captures a node's position in the network.

  17. FNAL central email systems

    Energy Technology Data Exchange (ETDEWEB)

    Schmidt, Jack; Lilianstrom, Al; Pasetes, Ray; Hill, Kevin; /Fermilab

    2004-10-01

    The FNAL Email System is the primary point of entry for email destined for an employee or user at Fermilab. This centrally supported system is designed for reliability and availability. It uses multiple layers of protection to help ensure that: (1) SPAM messages are tagged properly; (2) All mail is inspected for viruses; and (3) Valid mail gets delivered. This system employs numerous redundant subsystems to accomplish these tasks.

  18. Centrally Banked Cryptocurrencies

    OpenAIRE

    Danezis, G.; Meiklejohn, S.

    2016-01-01

    Current cryptocurrencies, starting with Bitcoin, build a decentralized blockchain-based transaction ledger, maintained through proofs-of-work that also serve to generate a monetary supply. Such decentralization has benefits, such as independence from national political control, but also significant limitations in terms of computational costs and scalability. We introduce RSCoin, a cryptocurrency framework in which central banks maintain complete control over the monetary supply, but rely on...

  19. Central simple Poisson algebras

    Institute of Scientific and Technical Information of China (English)

    SU; Yucai; XU; Xiaoping

    2004-01-01

    Poisson algebras are fundamental algebraic structures in physics and symplectic geometry. However, the structure theory of Poisson algebras has not been well developed. In this paper, we determine the structure of the central simple Poisson algebras related to locally finite derivations, over an algebraically closed field of characteristic zero.The Lie algebra structures of these Poisson algebras are in general not finitely-graded.

  20. Centrally Banked Cryptocurrencies

    OpenAIRE

    Danezis, George; Meiklejohn, Sarah

    2015-01-01

    Current cryptocurrencies, starting with Bitcoin, build a decentralized blockchain-based transaction ledger, maintained through proofs-of-work that also generate a monetary supply. Such decentralization has benefits, such as independence from national political control, but also significant limitations in terms of scalability and computational cost. We introduce RSCoin, a cryptocurrency framework in which central banks maintain complete control over the monetary supply, but rely on a distribut...

  1. Central osteosclerosis with trichothiodystrophy

    International Nuclear Information System (INIS)

    Trichothiodystrophy (TTD) is a rare, autosomal recessive, multisystem disorder associated with defects in nucleotide excision repair. We report a 7-year-old boy with TTD due to mutation in the XPD gene. The patient has classic features of this condition, including brittle, sulphur-deficient hair, ichthyosis, growth retardation and developmental delay. In addition, he has radiological evidence of progressive central osteosclerosis. Although similar radiological findings have previously been reported in a small number of patients, this association is not widely recognised. We review the radiological findings in this and other similar cases and discuss the natural history of these bony changes. (orig.)

  2. Solar thermal central receivers

    International Nuclear Information System (INIS)

    Market issues, environmental impact, and technology issues related to the Solar Central Receiver concept are addressed. The rationale for selection of the preferred configuration and working fluid are presented as the result of a joint utility-industry analysis. A $30 million conversion of Solar One to an external molten salt receiver would provide the intermediate step to a commercial demonstration plant. The first plant in this series could produce electricity at 11.2 cents/kWhr and the seventh at 8.2 cents/kWhr, completely competitive with projected costs of new utility plants in 1992

  3. Floods in Central China

    Science.gov (United States)

    2002-01-01

    This pair of true- and false-color images from the Moderate resolution Imaging Spectroradiometer (MODIS) shows flooding in central China on July 4, 2002. In the false-color image vegetation appears orange and water appears dark blue to black. Because of the cloud cover and the fact that some of the water is filled with sediment, the false-color image provides a clearer picture of where rivers have exceeded their banks and lakes have risen. The river in this image is the Yangtze River, and the large lake is the Poyang Hu. Credits: Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC

  4. Central ignition scenarios for TFTR

    International Nuclear Information System (INIS)

    The possibility of obtaining ignition in TFTR by means of very centrally peaked density profiles is examined. It is shown that local central alpha heating can be made to exceed local central energy losses (''central ignition'') under global conditions for which Q greater than or equal to 1. Time dependent 1-D transport simulations show that the normal global ignition requirements are substantially relaxed for plasmas with peaked density profiles. 18 refs., 18 figs

  5. Central Banking after the Crisis

    OpenAIRE

    Frederick S. Mishkin

    2013-01-01

    This paper explores where central banking is heading after the recent financial crisis. First it discusses the central bank consensus before the crisis and then outlines the key facts learned from the crisis that require changes in the way central banks conduct their business. Finally, it discusses four main areas in which central banks are altering their policy frameworks: 1) the interaction between monetary and financial stability policies, 2) nonconventional monetary policy, 3) risk manage...

  6. Three myths about central banks

    OpenAIRE

    Geoffrey P. Miller

    2002-01-01

    Do central banks control the business cycle? Should price stability be their only monetary policy goal? Do politicians give up a degree of power and gain nothing personally when they grant central banks independence? This Commentary argues that none of these widely held notions is true. The Commentary is based on a speech presented to participants at the conference on the Origins and Evolution of Central Banking, sponsored by the Central Bank Institute of the Federal Reserve Bank of Cleveland...

  7. Centralized vs. De-centralized Multinationals and Taxes

    DEFF Research Database (Denmark)

    Nielsen, Søren Bo; Raimondos-Møller, Pascalis; Schjelderup, Guttorm

    2005-01-01

    The paper examines how country tax differences affect a multinational enterprise's choice to centralize or de-centralize its decision structure. Within a simple model that emphasizes the multiple conflicting roles of transfer prices in MNEs - here, as a strategic pre-commitment device and a tax m...... manipulation instrument -, we show that (de-)centralized decisions are more profitable when tax differentials are (small) large.Keywords: Centralized vs. de-centralized decisions, taxes, MNEs.JEL-Classification: H25, F23, L23....

  8. en los pivotes centrales

    Directory of Open Access Journals (Sweden)

    Reynaldo Roque Rodés

    2005-01-01

    Full Text Available Se hace una revisión y comentarios sobre las ventajas y limitantes del empleo del LEPA (Low Enery Precision Aplication en los sistemas de riego de pivotes centrales. Estos sistemas o filosofía de manejo del agua para condiciones de escasez o mala calidad del líquido es una alternativa viable para la producción de alimentos. Introducida en la década del 80 en las planicies del sur de Texas, donde la alta evaporación del agua y la necesidad de regar grandes áreas con pivotes centrales obligaba a la búsqueda de una alternativa para incrementar al máximo la eficiencia de aplicación del riego. Aún en fase de estudio e introducción en Cuba para áreas específicas, puede ser una solución de incremento de los rendimientos de los cultivos, empleando menos agua y aguas con calidad limitada

  9. Central Sumatra enjoys success

    Energy Technology Data Exchange (ETDEWEB)

    Wongsosantiko, A.

    1977-05-02

    The Sihapas group contains the most prolific oil producing zones in the Central Sumatra Basin. It represents the transgressive, coarse clastic sequence deposited during the early Miocene. Some of these sandstone grade laterally into siltstones and shales of the Telisa Formation, believed to be a major source of rock for Central Sumatra oil. Recent exploratory wells drilled between the mountain front and coastal plain areas have provided more data for stratigraphic studies. These have resulted in subdivision of the lower Miocene transgressive sequence into discrete rock-stratigraphic units. The former Sihapas Formation has subsequently been elevated to group rank and now consists of several formations with the Duri Formation as the uppermost sand unit. This study covers Caltex's areas of operation, which includes the area between the Kampar River of the south, the Barumum River to the north, the Malacca Straits to the east, and the Barisan Mt. to the west. A basic map shows the regional scene, while a stratigraphic chart shows the lithology.

  10. Centrality Measures in Urban Networks

    CERN Document Server

    Crucitti, P; Porta, S; Crucitti, Paolo; Latora, Vito; Porta, Sergio

    2005-01-01

    Centrality has revealed crucial for understanding the structural order of complex relational networks. Centrality is also relevant for various spatial factors affecting human life and behaviors in cities. We present a comprehensive study of centrality distributions over geographic networks of urban streets. Four different measures of centrality, namely closeness, betweenness, straightness and information, are compared over eighteen 1-square-mile samples of different world cities. Samples are represented by primal geographic graphs, i.e. valued graphs defined by metric rather than topologic distance where intersections are turned into nodes and streets into edges. The spatial behavior of centrality indexes over the networks is investigated graphically by means of colour-coded maps. The results indicate that a spatial analysis, that we term Multiple Centrality Assessment(MCA), grounded not a single but on a set of different centrality indices, allows an extended comprehension of the city structure, nicely captu...

  11. Sucker rod centralizer

    Energy Technology Data Exchange (ETDEWEB)

    Rivas, O.; Newski, A.

    1989-10-03

    This patent describes a device for centralizing at least one sucker rod within a production pipe downhole in a well and for reducing frictional forces between the pipe and at least one sucker rod. It comprises an elongate, substantially cylindrical body member having a longitudinal axis, a plurality of slots within the member and a rotatable member mounted within each slot, each of the plurality of slots has its major dimension along a first axis parallel to the longitudinal axis of the body member and is oriented with respect to the other seats so as to form a helicoidal array for maximizing the total surface contact area between the rotatable members and the pipe and for decreasing the forces acting on each rotatable member.

  12. Centralizer for well casing

    International Nuclear Information System (INIS)

    This patent describes an improved centralizer for centering a well casing in a wellbore. It comprises: a first anchor adapted to fit around and be securely fixed to the casing, the first anchor being threaded on its external surface; a first collar adapted to fit around and be threadedly engaged by the first anchor; a second collar adapted to fit around and free to rotate and move axially with respect to the casing; a second anchor adapted to fit around and be securely fixed to the casing spaced from the first anchor and comprising a bearing surface for restraining axial movement of the second collar along the casing; and metallic straps extending between the first collar and the second collar, and being securely fixed to each

  13. Hope for Central China

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The cities surrounding Changsha and Wuhan in the middle reaches of the Yangtze River will ally to form a new pilot zone to boost regional economic development China’s fourth pilot zone for compre- hensive and coordinated economic reform will soon debut in the middle reaches of the Yangtze River,open- ing a new area to attract foreign investment. The application has been submitted to the State Council for approval. The pilot zone will include two clusters of cities in central China:One consists of Wuhan,capital of Hubei Province,and eight surrounding cities in Hubei,and the other is composed of Changsha,Zhuzhou and Xiangtan,three major cities in Hunan Province.

  14. UA2 central calorimeter

    CERN Multimedia

    The UA2 central calorimeter measured the energy of individual particles created in proton-antiproton collisions. Accurate calibration allowed the W and Z masses to be measured with a precision of about 1%. The calorimeter had 24 slices like this one, each weighing 4 tons. The slices were arranged like orange segments around the collision point. Incoming particles produced showers of secondary particles in the layers of heavy material. These showers passed through the layers of plastic scintillator, generating light which was taken by light guides (green) to the data collection electronics. The amount of light was proportional to the energy of the original particle. The inner 23 cm of lead and plastic sandwiches measured electrons and photons; the outer 80 cm of iron and plastic sandwiches measured strongly interacting hadrons. The detector was calibrated by injecting light through optical fibres or by placing a radioactive source in the tube on the bottom edge.

  15. UA1 central detector

    CERN Multimedia

    The UA1 central detector was crucial to understanding the complex topology of proton-antiproton events. It played a most important role in identifying a handful of Ws and Zs among billions of collisions. The detector was a 6-chamber cylindrical assembly 5.8 m long and 2.3 m in diameter, the largest imaging drift chamber of its day. It recorded the tracks of charged particles curving in a 0.7 Tesla magnetic field, measuring their momentum, the sign of their electric charge and their rate of energy loss (dE/dx). Atoms in the argon-ethane gas mixture filling the chambers were ionised by the passage of charged particles. The electrons which were released drifted along an electric field shaped by field wires and were collected on sense wires. The geometrical arrangement of the 17000 field wires and 6125 sense wires allowed a spectacular 3-D interactive display of reconstructed physics events to be produced.

  16. [Central auditory prosthesis].

    Science.gov (United States)

    Lenarz, T; Lim, H; Joseph, G; Reuter, G; Lenarz, M

    2009-06-01

    Deaf patients with severe sensory hearing loss can benefit from a cochlear implant (CI), which stimulates the auditory nerve fibers. However, patients who do not have an intact auditory nerve cannot benefit from a CI. The majority of these patients are neurofibromatosis type 2 (NF2) patients who developed neural deafness due to growth or surgical removal of a bilateral acoustic neuroma. The only current solution is the auditory brainstem implant (ABI), which stimulates the surface of the cochlear nucleus in the brainstem. Although the ABI provides improvement in environmental awareness and lip-reading capabilities, only a few NF2 patients have achieved some limited open set speech perception. In the search for alternative procedures our research group in collaboration with Cochlear Ltd. (Australia) developed a human prototype auditory midbrain implant (AMI), which is designed to electrically stimulate the inferior colliculus (IC). The IC has the potential as a new target for an auditory prosthesis as it provides access to neural projections necessary for speech perception as well as a systematic map of spectral information. In this paper the present status of research and development in the field of central auditory prostheses is presented with respect to technology, surgical technique and hearing results as well as the background concepts of ABI and AMI. PMID:19517084

  17. CENTRAL EUROPE: Role models

    International Nuclear Information System (INIS)

    Hungary is one of the newcomers to the CERN fold, having joined in 1992. The country's contributions are naturally in line with its slender resources and are not as immediately visible as those of the major Western European Member States. However the approach used and its consequent successes provide a good role model for a smaller nation in an international research environment. This was reflected on 24 September at a meeting of the European Committee for Future Accelerators (ECFA) convened in Budapest, continuing an ECFA tradition of holding meetings in national centres to learn more about the physics programmes of different countries. This tradition started with visits to major West European Centres, but last year ECFA held a meeting in Warsaw, its first in a central European country. By far the largest Hungarian population centre, Budapest is also a hub for national research in this sector, with university centres and the KFKI Research Institute for Particle and Nuclear Physics of the National Academy of Sciences. However important research work is also carried out in the eastern city of Debrecen. Hungarians look back to the classic investigations of Eotvos early this century as the starting point of their national tradition in fundamental physics. (In the mid-80s, these experiments briefly came back into vogue when there was a suggestion of an additional 'fifth force' contribution to nuclear masses.)

  18. Automatic system of tests for control equipment in combined cycle power stations; Sistema automatico de pruebas para equipos de control en centrales de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Martinez M, Miguel A; Flores L, Zenon; Delgadillo V, Miguel A; Gutierrez A, Ruben [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2001-07-01

    This article deals on the Automatic System of Tests, denominated PROBADOR, used by the Gerencia de Control e Instrumentation (GCI) of the Instituto de Investigaciones Electricas (IIE)for the accomplishment of dynamic tests in laboratory, to the systems of acquisition and control developed with the electronic line SAC-IIE that are installed in the Thermoelectric Power station of Combined Cycle (CTCC) of Dos Bocas, Veracruz and Gomez Palacio, Durango, Mexico. Also the architecture, the functions that are carried out in the equipment of the System of Acquisition and control (SAC) and in the personal computer (PC) that conforms it are described, as well as the methodology used for the development of the tests. The PC constitutes Interface Man-Machine (IMM) and in the SAC equipment the simulation of the processes is made (by means of the execution of algebraic-differential equations) in the compressor, combustion chamber, gas turbine, heat recuperators, steam turbines and condenser equipment that integrate a CTCC. The equations that are used are based in the thermodynamics, flow dynamics and heat transfer; they become attached to the real process with a margin of error that is estimated in 10%. Finally, the tendencies of the PROBADOR and the technical and economic advantages are described that it has provided for the improvement in the performance of the control systems, before different situations, with no need to have the real process. [Spanish] Este articulo versa sobre el Sistema Automatico de Pruebas, denominado PROBADOR, utilizado por la Gerencia de Control e Instrumentacion (GCI) del Instituto de Investigaciones Electricas para la realizacion de pruebas dinamicas en laboratorio, a los sistemas de adquisicion y control desarrollado con la linea electronica SAC-IIE que estan instalados en las Centrales Termoelectricas de Ciclo Combinado (CTCC) de Dos Bocas, Veracruz y Gomez Palacio, Durango, Mexico. Tambien se describen la arquitectura, las funciones que se llevan

  19. Central pontine myelinolysis.

    Science.gov (United States)

    Kiley, M A; King, M; Burns, R J

    1999-03-01

    Central pontine myelinolysis (CPM) was initially associated with alcoholism. Subsequently other factors, including rapid reversal of hyponatraemia and extreme serum hypoosmolality associated with severe burns, have been identified as other important factors in its pathogenesis. Extra-pontine lesions have also been described. CPM may be found at autopsy, either having been overlooked during life or as an incidental finding. Its precise incidence is not known but the ability to diagnose it during life has been helped by modern neuroimaging, particularly magnetic resonance imaging (MRI) of the brain stem. In the past the prognosis for CPM was thought to be invariably fatal. It is clear now that with the greater general awareness of the disorder and the ability to diagnose it during life that some degree of recovery is possible. However, the number who do recover and the degree of recovery is not known. We report a 40-year-old man who developed CPM presenting with quadriparesis and inability to speak and swallow. There were risk factors for CPM and the diagnosis was confirmed by MRI scanning. He made a complete recovery although he remains ataxic. We are reporting this case as we believe it is important to make clinicians aware of the potential for recovery of CPM. While no specific treatment has been shown to influence the degree and rate of recovery of the demyelination, the fact that the quadriplegia and bulbar paralysis can recover fully is of considerable importance. In particular, it means that when the diagnosis is made, complete and vigorous nursing and medical care is warranted. PMID:18639140

  20. Dublin South Central (DSC)

    LENUS (Irish Health Repository)

    O'Gorman, Clodagh S M

    2010-12-01

    Children who appear healthy, even if they have one or more recognized cardiovascular risk factors, do not generally have outcomes of cardiovascular or other vascular disease during childhood. Historically, pediatric medicine has not aggressively screened for or treated cardiovascular risk factors in otherwise healthy children. However, studies such as the P-Day Study (Pathobiological Determinants of Atherosclerosis in Youth), and the Bogalusa Heart Study, indicate that healthy children at remarkably young ages can have evidence of significant atherosclerosis. With the increasing prevalence of pediatric obesity, can we expect more health problems related to the consequences of pediatric dyslipidemia, hypertriglyceridemia, and atherosclerosis in the future? For many years, medications have been available and used in adult populations to treat dyslipidemia. In recent years, reports of short-term safety of some of these medications in children have been published. However, none of these studies have detailed long-term follow-up, and therefore none have described potential late side-effects of early cholesterol-lowering therapy, or potential benefits in terms of reduction of or delay in cardiovascular or other vascular end-points. In 2007, the American Heart Association published a scientific statement on the use of cholesterol-lowering therapy in pediatric patients. In this review paper, we discuss some of the current literature on cholesterol-lowering therapy in children, including the statins that are currently available for use in children, and some of the cautions with using these and other cholesterol-lowering medications. A central tenet of this review is that medications are not a substitute for dietary and lifestyle interventions, and that even in children on cholesterol-lowering medications, physicians should take every opportunity to encourage children and their parents to make healthy diet and lifestyle choices.

  1. Central nervous system tumors

    International Nuclear Information System (INIS)

    Central nervous system (CNS) tumors are relatively common in veterinary medicine, with most diagnoses occurring in the canine and feline species. Numerous tumor types from various cells or origins have been identified with the most common tumors being meningiomas and glial cell tumors. Radiation therapy is often used as an aid to control the clinical signs associated with these neoplasms. In general, these tumors have a very low metastatic potential, such that local control offers substantial benefit. Experience in veterinary radiation oncology would indicate that many patients benefit from radiation treatment. Current practice indicates the need for computed tomography or magnetic resonance imaging studies. These highly beneficial studies are used for diagnosis, treatment planning, and to monitor treatment response. Improvements in treatment planning and radiation delivered to the tumor, while sparing the normal tissues, should improve local control and decrease potential radiation related problems to the CNS. When possible, multiple fractions of 3 Gy or less should be used. The tolerance dose to the normal tissue with this fractionation schedule is 50 to 55 Gy. The most common and serious complications of radiation for CNS tumors is delayed radiation myelopathy and necrosis. Medical management of the patient during radiation therapy requires careful attention to anesthetic protocols, and medications to reduce intracranial pressure that is often elevated in these patients. Canine brain tumors have served as an experimental model to test numerous new treatments. Increased availability of advanced imaging modalities has spawned increased detection of these neoplasms. Early detection of these tumors with appropriate aggressive therapy should prove beneficial to many patients

  2. Central bank independence and ageing

    OpenAIRE

    Farvaque, Etienne; Héricourt, Jérôme; Lagadec, Gaël

    2008-01-01

    We contrast the influence of demography and central bank independence on inflation. The recent demographic trends in developed countries are shown to weight more on inflation than central bank independence, while the contrary stands for the period from 1960 to 1979.

  3. Central dose registration in Switzerland

    International Nuclear Information System (INIS)

    In 1990 the Central Swiss Dose Register of the Federal Health Office took up its activities. The following publication describes the organisation of dosimetry applicable to persons in Switzerland together with a brief history of dose registration, the central dose register and its applications. 2 refs

  4. Central control of body temperature.

    Science.gov (United States)

    Morrison, Shaun F

    2016-01-01

    Central neural circuits orchestrate the behavioral and autonomic repertoire that maintains body temperature during environmental temperature challenges and alters body temperature during the inflammatory response and behavioral states and in response to declining energy homeostasis. This review summarizes the central nervous system circuit mechanisms controlling the principal thermoeffectors for body temperature regulation: cutaneous vasoconstriction regulating heat loss and shivering and brown adipose tissue for thermogenesis. The activation of these thermoeffectors is regulated by parallel but distinct efferent pathways within the central nervous system that share a common peripheral thermal sensory input. The model for the neural circuit mechanism underlying central thermoregulatory control provides a useful platform for further understanding of the functional organization of central thermoregulation, for elucidating the hypothalamic circuitry and neurotransmitters involved in body temperature regulation, and for the discovery of novel therapeutic approaches to modulating body temperature and energy homeostasis. PMID:27239289

  5. SQUARE AND RHOMBUS CENTRAL CONFIGURATIONS

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    In this paper, we consider the flat central configurations of bodies using the characteristic set method. We completely solve two special cases of four planets, namely,the square and the rhombus. For the square case, we obtain that a square is a central configuration only in the case where the masses are equal and there exactly are two different square central configurations determined by the mass and the angular velocity; for the rhombus case, we obtain that if a rhombus is a central configuration, then the masses of the diagonal vertices must be equal. Furthermore, there are two or three or four different rhombus central configurations determined by the masses and the angular velocity.

  6. Central control of body temperature

    Science.gov (United States)

    Morrison, Shaun F.

    2016-01-01

    Central neural circuits orchestrate the behavioral and autonomic repertoire that maintains body temperature during environmental temperature challenges and alters body temperature during the inflammatory response and behavioral states and in response to declining energy homeostasis. This review summarizes the central nervous system circuit mechanisms controlling the principal thermoeffectors for body temperature regulation: cutaneous vasoconstriction regulating heat loss and shivering and brown adipose tissue for thermogenesis. The activation of these thermoeffectors is regulated by parallel but distinct efferent pathways within the central nervous system that share a common peripheral thermal sensory input. The model for the neural circuit mechanism underlying central thermoregulatory control provides a useful platform for further understanding of the functional organization of central thermoregulation, for elucidating the hypothalamic circuitry and neurotransmitters involved in body temperature regulation, and for the discovery of novel therapeutic approaches to modulating body temperature and energy homeostasis. PMID:27239289

  7. North Central Thailand

    Science.gov (United States)

    1998-01-01

    This radar image shows the dramatic landscape in the Phang Hoei Range of north central Thailand, about 40 kilometers (25 miles) northeast of the city of Lom Sak. The plateau, shown in green to the left of center, is the area of Phu Kradung National Park. This plateau is a remnant of a once larger plateau, another portion of which is seen along the right side of the image. The plateaus have been dissected by water erosion over thousands of years. Forest areas appear green on the image; agricultural areas and settlements appear as red and blue. North is toward the lower right. The area shown is 38 by 50 kilometers (24 by 31 miles) and is centered at 16.96 degrees north latitude, 101.67 degrees east longitude. Colors are assigned to different radar frequencies and polarizations as follows: red is L-band horizontally transmitted and horizontally received; green is L-band horizontally transmitted and vertically received; blue is C-band horizontally transmitted and vertically received. The image was acquired by the Spaceborne Imaging Radar-C/X-band Synthetic Aperture (SIR-C/X-SAR) imaging radar on October 3, 1994, when it flew aboard the space shuttle Endeavour. SIR-C/X-SAR is a joint mission of the U.S./German and Italian space agencies.Spaceborne Imaging Radar-C and X-Band Synthetic Aperture Radar (SIR-C/X-SAR) is part of NASA's Mission to Planet Earth. The radars illuminate Earth with microwaves allowing detailed observations at any time, regardless of weather or sunlight conditions. SIR-C/X-SAR uses three microwave wavelengths: L-band (24 cm), C-band (6 cm) and X-band (3 cm). The multi-frequency data will be used by the international scientific community to better understand the global environment and how it is changing. The SIR-C/X-SAR data, complemented by aircraft and ground studies, will give scientists clearer insights into those environmental changes which are caused by nature and those changes which are induced by human activity. SIR-C was developed by NASA

  8. Betweenness centrality profiles in trees

    CERN Document Server

    Fish, Benjamin; Turan, Gyorgy

    2016-01-01

    Betweenness centrality of a vertex in a graph measures the fraction of shortest paths going through the vertex. This is a basic notion for determining the importance of a vertex in a network. The k-betweenness centrality of a vertex is defined similarly, but only considers shortest paths of length at most k. The sequence of k-betweenness centralities for all possible values of k forms the betweenness centrality profile of a vertex. We study properties of betweenness centrality profiles in trees. We show that for scale-free random trees, for fixed k, the expectation of k-betweenness centrality strictly decreases as the index of the vertex increases. We also analyze worst-case properties of profiles in terms of the distance of profiles from being monotone, and the number of times pairs of profiles can cross. This is related to whether k-betweenness centrality, for small values of k, may be used instead of having to consider all shortest paths. Bounds are given that are optimal in order of magnitude. We also pre...

  9. Central European gas market perspectives

    International Nuclear Information System (INIS)

    This presentation deals with (1) Definition of the Central European market, (2) Factors driving up consumption of natural gas in Central and Eastern Europe, (3) Role of natural gas in regional energy consumption, (4) Position of natural gas in individual country markets, (5) Future sources of imported natural gas into the region. The Central European market are the eleven countries Albania, Bulgaria, Croatia, Czech Republic, Hungary, Macedonia, Poland, Romania, Serbia and Montenegro, Slovakia, and Slovenia, with a total population of 121 million. This market is comparable to combined France and Italy in terms of population, but only 30% of its size in terms of GDP

  10. Centralized digital control of accelerators

    International Nuclear Information System (INIS)

    In contrasting the title of this paper with a second paper to be presented at this conference entitled Distributed Digital Control of Accelerators, a potential reader might be led to believe that this paper will focus on systems whose computing intelligence is centered in one or more computers in a centralized location. Instead, this paper will describe the architectural evolution of SLAC's computer based accelerator control systems with respect to the distribution of their intelligence. However, the use of the word centralized in the title is appropriate because these systems are based on the use of centralized large and computationally powerful processors that are typically supported by networks of smaller distributed processors

  11. Payments and Central Bank Policy

    DEFF Research Database (Denmark)

    Korsgaard, Søren

    This thesis consists of three chapters. The rst, "Paying for Payments", examines the role of interchange fees in payment card networks. The second, "Bank Liquidity and the Interbank Market" (co-authored with Mikael Reimer Jensen), investigates how banks' liquidity holdings at the central bank a ect...... outcomes in the money market. The third, "Collateralized Lending and Central Bank Collateral Policy", considers the emergence of credit constraints under collateralized lending, and how central banks use collateral policy to mitigate these constraints. While the chapters can be read independently, they...... share common themes. Each chapter is concerned with payments in one way or another, each is concerned with the e ciency of market outcomes, and, to the extent that there is scope for improving these outcomes, each discusses the appropriate role for policy, in particular central bank policy....

  12. Central Exclusive Production at LHCb

    CERN Document Server

    McNulty, Ronan

    2015-01-01

    Central Exclusive Production is a unique QCD process in which particles are produced via colourless propagators. Several results have been obtained at LHCb for the production of single charmonia, pairs of charmonia, and single bottomonia.

  13. The Central Trigger Processor (CTP)

    CERN Multimedia

    Franchini, Matteo

    2016-01-01

    The Central Trigger Processor (CTP) receives trigger information from the calorimeter and muon trigger processors, as well as from other sources of trigger. It makes the Level-1 decision (L1A) based on a trigger menu.

  14. Congenital nystagmus and central hypothyroidism

    OpenAIRE

    Reynaert, Nele; Braat, Elke; de Zegher, Francis

    2015-01-01

    We observed a male newborn with bilateral nystagmus and central hypothyroidism without hypoprolactinemia due to a deletion of chromosome band Xq26.1q26.2, containing FRMD7 and IGSF1. These two loss-of function mutations are known to cause, respectively, congenital nystagmus and the ensemble of central hypothyroidism, hypoprolactinemia and testicular enlargement. These latter two features may not yet be present in early life.

  15. Central Control Over Distributed Routing

    OpenAIRE

    Vissicchio, Stefano; Tilmans, Olivier; Vanbever, Laurent; Rexford, Jennifer; ACM SIGCOMM

    2015-01-01

    Centralizing routing decisions offers tremendous flexibility, but sacrifices the robustness of distributed protocols. In this paper, we present Fibbing, an architecture that achieves both flexibility and robustness through central control over distributed routing. Fibbing introduces fake nodes and links into an underlying link-state routing protocol, so that routers compute their own forwarding tables based on the augmented topology. Fibbing is expressive, and readily supports flexible load b...

  16. Rogoff's 'Conservative' Central Banker Restored

    OpenAIRE

    Herrendorf, Berthold; Lockwood, Ben

    1996-01-01

    This paper shows that delegation of monetary policy to a weight-conservative central banker is optimal, although the government can also use an inflation contract, an employment target, an inflation target, or any combination of these, to control the central banker. The key feature of our model is a stochastic inflation bias, arising when wage-setters receive some information about a supply shock prior to signing nominal wage contracts. Weight-conservatism is shown to be desirable if the stoc...

  17. CENTRAL PLATEAU REMEDIATION OPTIMIZATION STUDY

    Energy Technology Data Exchange (ETDEWEB)

    BERGMAN, T. B.; STEFANSKI, L. D.; SEELEY, P. N.; ZINSLI, L. C.; CUSACK, L. J.

    2012-09-19

    THE CENTRAL PLATEAU REMEDIATION OPTIMIZATION STUDY WAS CONDUCTED TO DEVELOP AN OPTIMAL SEQUENCE OF REMEDIATION ACTIVITIES IMPLEMENTING THE CERCLA DECISION ON THE CENTRAL PLATEAU. THE STUDY DEFINES A SEQUENCE OF ACTIVITIES THAT RESULT IN AN EFFECTIVE USE OF RESOURCES FROM A STRATEGIC PERSPECTIVE WHEN CONSIDERING EQUIPMENT PROCUREMENT AND STAGING, WORKFORCE MOBILIZATION/DEMOBILIZATION, WORKFORCE LEVELING, WORKFORCE SKILL-MIX, AND OTHER REMEDIATION/DISPOSITION PROJECT EXECUTION PARAMETERS.

  18. Re-Centring Central Asia

    OpenAIRE

    Grenet, Frantz

    2015-01-01

    The “golden peaches” of Samarkand in the days of Sogdian trade As a cultural area Central Asia was recognized at a late stage, since its emergence as a geographical reality was very slow. The term Central Asia was coined in around 1825, simultaneously in Russia and in France, by the diplomat Georges de Meyendorff and by Julius Klaproth, respectively. It soon gained currency, along with its variant Middle Asia, sometimes preferred in Russia. Reading this nineteenth-century geographic literat...

  19. Audit Committees in Central Banks

    OpenAIRE

    Kenneth Sullivan; Marie-Therese Camilleri; Tonny Lybek

    2007-01-01

    This paper reviews the tasks and design of audit committees, increasingly recommended as a way to strengthen financial accountability and good central bank governance. It outlines the motivations for the establishment of audit committees in commercial corporations and public sector entities, and explains how audit committees interact with other governance bodies within a central bank. The paper focuses on the functions of an audit committee, since the terminology of the governance structure i...

  20. Tenor bass, dr02, Central Symphony

    OpenAIRE

    Helmlinger, Aurélie

    2011-01-01

    Tenor bass, dr02, augmented, Central Symphony Steel Orchestra panyard, Government House road, Tobago( erreur dans le nom de fichier : "central_symphony_steel_tenor_bass_1_dr02" ; nom correct ="central_symphony_tenor_bass_1_dr02 " )

  1. Network centrality of metro systems.

    Directory of Open Access Journals (Sweden)

    Sybil Derrible

    Full Text Available Whilst being hailed as the remedy to the world's ills, cities will need to adapt in the 21(st century. In particular, the role of public transport is likely to increase significantly, and new methods and technics to better plan transit systems are in dire need. This paper examines one fundamental aspect of transit: network centrality. By applying the notion of betweenness centrality to 28 worldwide metro systems, the main goal of this paper is to study the emergence of global trends in the evolution of centrality with network size and examine several individual systems in more detail. Betweenness was notably found to consistently become more evenly distributed with size (i.e. no "winner takes all" unlike other complex network properties. Two distinct regimes were also observed that are representative of their structure. Moreover, the share of betweenness was found to decrease in a power law with size (with exponent 1 for the average node, but the share of most central nodes decreases much slower than least central nodes (0.87 vs. 2.48. Finally the betweenness of individual stations in several systems were examined, which can be useful to locate stations where passengers can be redistributed to relieve pressure from overcrowded stations. Overall, this study offers significant insights that can help planners in their task to design the systems of tomorrow, and similar undertakings can easily be imagined to other urban infrastructure systems (e.g., electricity grid, water/wastewater system, etc. to develop more sustainable cities.

  2. Network centrality of metro systems.

    Science.gov (United States)

    Derrible, Sybil

    2012-01-01

    Whilst being hailed as the remedy to the world's ills, cities will need to adapt in the 21(st) century. In particular, the role of public transport is likely to increase significantly, and new methods and technics to better plan transit systems are in dire need. This paper examines one fundamental aspect of transit: network centrality. By applying the notion of betweenness centrality to 28 worldwide metro systems, the main goal of this paper is to study the emergence of global trends in the evolution of centrality with network size and examine several individual systems in more detail. Betweenness was notably found to consistently become more evenly distributed with size (i.e. no "winner takes all") unlike other complex network properties. Two distinct regimes were also observed that are representative of their structure. Moreover, the share of betweenness was found to decrease in a power law with size (with exponent 1 for the average node), but the share of most central nodes decreases much slower than least central nodes (0.87 vs. 2.48). Finally the betweenness of individual stations in several systems were examined, which can be useful to locate stations where passengers can be redistributed to relieve pressure from overcrowded stations. Overall, this study offers significant insights that can help planners in their task to design the systems of tomorrow, and similar undertakings can easily be imagined to other urban infrastructure systems (e.g., electricity grid, water/wastewater system, etc.) to develop more sustainable cities. PMID:22792373

  3. Coverage centralities for temporal networks*

    Science.gov (United States)

    Takaguchi, Taro; Yano, Yosuke; Yoshida, Yuichi

    2016-02-01

    Structure of real networked systems, such as social relationship, can be modeled as temporal networks in which each edge appears only at the prescribed time. Understanding the structure of temporal networks requires quantifying the importance of a temporal vertex, which is a pair of vertex index and time. In this paper, we define two centrality measures of a temporal vertex based on the fastest temporal paths which use the temporal vertex. The definition is free from parameters and robust against the change in time scale on which we focus. In addition, we can efficiently compute these centrality values for all temporal vertices. Using the two centrality measures, we reveal that distributions of these centrality values of real-world temporal networks are heterogeneous. For various datasets, we also demonstrate that a majority of the highly central temporal vertices are located within a narrow time window around a particular time. In other words, there is a bottleneck time at which most information sent in the temporal network passes through a small number of temporal vertices, which suggests an important role of these temporal vertices in spreading phenomena. Contribution to the Topical Issue "Temporal Network Theory and Applications", edited by Petter Holme.Supplementary material in the form of one pdf file available from the Journal web page at http://dx.doi.org/10.1140/epjb/e2016-60498-7

  4. Coverage centralities for temporal networks

    CERN Document Server

    Takaguchi, Taro; Yoshida, Yuichi

    2015-01-01

    Structure of real networked systems, such as social relationship, can be modeled as temporal networks in which each edge appears only at the prescribed time. Understanding the structure of temporal networks requires quantifying the importance of a temporal vertex, which is a pair of vertex index and time. In this paper, we define two centrality measures of a temporal vertex by the proportion of (normal) vertex pairs, the quickest routes between which can (or should) use the temporal vertex. The definition is free from parameters and robust against the change in time scale on which we focus. In addition, we can efficiently compute these centrality values for all temporal vertices. Using the two centrality measures, we reveal that distributions of these centrality values of real-world temporal networks are heterogeneous. For various datasets, we also demonstrate that a majority of the highly central temporal vertices are located within a narrow time window around a particular time. In other words, there is a bo...

  5. Centralized digital control of accelerators

    Energy Technology Data Exchange (ETDEWEB)

    Melen, R.E.

    1983-09-01

    In contrasting the title of this paper with a second paper to be presented at this conference entitled Distributed Digital Control of Accelerators, a potential reader might be led to believe that this paper will focus on systems whose computing intelligence is centered in one or more computers in a centralized location. Instead, this paper will describe the architectural evolution of SLAC's computer based accelerator control systems with respect to the distribution of their intelligence. However, the use of the word centralized in the title is appropriate because these systems are based on the use of centralized large and computationally powerful processors that are typically supported by networks of smaller distributed processors.

  6. Pathophysiology of central sleep apneas.

    Science.gov (United States)

    Hernandez, Adam B; Patil, Susheel P

    2016-05-01

    The transition from wake to sleep is accompanied by a host of physiologic changes, which result in major alterations in respiratory control and may result in sleep-related breathing disorders. The central sleep apneas are a group of sleep-related breathing disorders that are characterized by recurrent episodes of airflow reduction or cessation due to a temporary reduction or absence of central respiratory drive. The fundamental hallmark of central sleep apnea (CSA) disorders is the presence of ventilatory control instability; however, additional mechanisms play a role in one or more specific manifestations of CSA. CSA may manifest during conditions of eucapnia/hypocapnia or chronic hypercapnia, which is a useful clinical classification that lends understanding to the underlying pathophysiology and potential therapies. In this review, an overview of normal breathing physiology is provided, followed by a discussion of pathophysiologic mechanisms that promote CSA and the mechanisms that are specific to different manifestations of CSA. PMID:26782104

  7. Network Centrality of Metro Systems

    OpenAIRE

    Sybil Derrible

    2012-01-01

    Whilst being hailed as the remedy to the world's ills, cities will need to adapt in the 21(st) century. In particular, the role of public transport is likely to increase significantly, and new methods and technics to better plan transit systems are in dire need. This paper examines one fundamental aspect of transit: network centrality. By applying the notion of betweenness centrality to 28 worldwide metro systems, the main goal of this paper is to study the emergence of global trends in the e...

  8. Una ilusión renovada y vivencias compartidas con Ramon Margalef

    OpenAIRE

    P. Montserrat Recoder

    2005-01-01

    Cuando se pierde al amigo y termina lo iniciado con tanta naturalidad al empezar mi carrera investigadora, la imaginación rememora aquello que nos unió durante más de medio siglo; así, en mí aún revive algo de aquel Ramón que ya no puede morir y se perpetúa en el Ser sustancial, el permanente, origen y fin de todo.

  9. Ramon Vinyes, profesor del colegio de Barranquilla para señoritas. Testimonios

    Directory of Open Access Journals (Sweden)

    Jordi Lladó i Vilaseca

    2005-01-01

    Full Text Available El autor recoge una muestra del testimonio de aquellas alumnas del Colegio de Barranquilla para Señoritas que siguieron las clases de Ramón Vinyes entre 1940 y 1950 (Rebeca Álvarez Reales, Maria Ardila de Maury, Gloria Ortiz de Salcedo, Carmen Polo de Morales, Esperanza Salgado

  10. Keskerakond nõuab toidukaupade käibemaksu alandamist / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2004-01-01

    Eesti Keskerakonna fraktsioon esitas 5. mail Riigikogu menetlusse eelnõu toidukaupade käibemaksumäära alandamiseks, mille põhieesmärgiks on Euroopa Liitu astumisega kaasneva üldise hinnatõusu pidurdamine

  11. Euroopa tahab oma sõnumit inimestele lähemale tuua / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2004-01-01

    Ilmunud ka: Vali Uudised, 16. jaan. 2004, lk. 2; Pärnu Postimees, 16. jaan. 2004, lk. 11. Kokkuvõtteid Eesti Keskerakonna delegatsiooni visiidist Brüsselisse 6.-7. jaanuaril 2004 Euroopa Liberaaldemokraatliku Reformipartei Europarlamendi fraktsiooni küllakutsel

  12. Oviir : Euroopa Liit peab vältima sotsiaalsete äärealade teket / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2005-01-01

    Euroopa Parlament kiitis heaks tööhõive ja sotsiaalse solidaarsuse integreeritud programmi PROGRESS, millega eraldatakse aastatel 2007-2013 Euroopa Liidu eelarvest üle 800 milj. euro tööhõive, sotsiaalse kaitse ja kaasamise, töökeskkonna, töötervishoiu, tööohutuse, mittediskrimineerimise ning soolise võrdõiguslikkuse olukorra parandamiseks liikmesriikides ja Euroopa Liiduga assotsieerunud riikides

  13. EL rahastab stalinismiohvrite mälestuse jäädvustamist / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2006-01-01

    Euroopa Parlament võttis vastu resolutsiooni, millega on aastateks 2007-2013 loodud programm "Euroopa kodanikele" eesmärgiga vähemalt 235 miljoni euroga toetada Euroopa Liidu põhiõiguste hartaga sätestatud Euroopa väärtuste ja aktiivse Euroopa kodakondsuse edendamist

  14. Terrorismi koht rahvusvahelises õiguses ja tema karistusõiguslik määratlus / Ramon Rask

    Index Scriptorium Estoniae

    Rask, Ramon

    2006-01-01

    Terrorismi määratlusest, õigusliku positsiooni kujunemisest ja kohast rahvusvahelises õigussüsteemis. 28. märtsil 2006 valmis Justiitsministeeriumis karistusseadustiku muutmise seaduse eelnõu, milles kavandatakse muuta terrorismi põhikoosseisu ja lisada kolm terrorismi koosseisu

  15. Copycats of the Central Himalayas

    NARCIS (Netherlands)

    P.A. Arora (Payal)

    2009-01-01

    textabstractThis case study highlights practices of a rarely documented group of neo-users of the Internet or newbies from Central Himalayas, serving as a catalyst for delving deeply into the act of ‘plagiarism’ in online learning By looking at such ‘learning’ practices away from schools, namely at

  16. /S/ in Central American Spanish.

    Science.gov (United States)

    Lipski, John M.

    1985-01-01

    Describes the behavior of the phoneme /s/ in Central American Spanish by comparing the speech patterns of residents of Guatemala City, San Salvador, Tegucigalpa, San Jose, and Managua. Considers the possible diachronic processes which could have given rise to the current configurations and the theoretical consequences implied by the…

  17. The CMS central hadron calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Freeman, J.; E892 Collaboration

    1996-12-31

    The CMS central hadron calorimeter is a copper absorber/ scintillator sampling structure. We describe design choices that led us to this concept, details of the mechanical and optical structure, and test beam results. We discuss calibration techniques, and finally the anticipated construction schedule.

  18. A First for Central America

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    FTA gives impetus to China’s trade with Costa Rica and other countries in the region The free trade agreement (FTA) between China and Costa Rica, signed in April 2010,came into effect on August 1.It was the first free trade pact between China and a Central

  19. Vulnerability in north- central Vietnam

    DEFF Research Database (Denmark)

    Casse, Thorkil; Milhøj, Anders; Nguyen, Thao Phuong

    2015-01-01

    This article examines changes in livelihood strategies in response to flooding. It does so on the basis of a household survey which was undertaken in three provinces in north central Vietnam. All households in the survey were regularly affected by flooding, but only poor households experience...

  20. Illustrating the Central Limit Theorem

    Science.gov (United States)

    Corcoran, Mimi

    2016-01-01

    Statistics is enjoying some well-deserved limelight across mathematics curricula of late. Some statistical concepts, however, are not especially intuitive, and students struggle to comprehend and apply them. As an AP Statistics teacher, the author appreciates the central limit theorem as a foundational concept that plays a crucial role in…

  1. Centralized Allocation in Multiple Markets

    DEFF Research Database (Denmark)

    Monte, Daniel; Tumennasan, Norovsambuu

    | generalizations of Gale's Top Trading Cycles mechanism. We study the centralized allocation that takes place in multiple markets. For example, the assignment of multiple types of indivisible objects; or the assignment of objects in successive periods. We show that the set of strategy-proof, Pareto efficient and...

  2. From Centrality to Temporary Fame: Dynamic Centrality in Complex Networks

    OpenAIRE

    Braha, Dan; Bar-Yam, Yaneer

    2006-01-01

    We develop a new approach to the study of the dynamics of link utilization in complex networks using records of communication in a large social network. Counter to the perspective that nodes have particular roles, we find roles change dramatically from day to day. "Local hubs" have a power law degree distribution over time, with no characteristic degree value. Our results imply a significant reinterpretation of the concept of node centrality in complex networks, and among other conclusions su...

  3. Centralized versus Decentralized Infrastructure Networks

    CERN Document Server

    Hines, Paul D H; Schläpfer, Markus

    2015-01-01

    While many large infrastructure networks, such as power, water, and natural gas systems, have similar physical properties governing flows, these systems tend to have distinctly different sizes and topological structures. This paper seeks to understand how these different size-scales and topological features can emerge from relatively simple design principles. Specifically, we seek to describe the conditions under which it is optimal to build decentralized network infrastructures, such as a microgrid, rather than centralized ones, such as a large high-voltage power system. While our method is simple it is useful in explaining why sometimes, but not always, it is economical to build large, interconnected networks and in other cases it is preferable to use smaller, distributed systems. The results indicate that there is not a single set of infrastructure cost conditions under which optimally-designed networks will have highly centralized architectures. Instead, as costs increase we find that average network size...

  4. A centralized audio presentation manager

    Energy Technology Data Exchange (ETDEWEB)

    Papp, A.L. III; Blattner, M.M.

    1994-05-16

    The centralized audio presentation manager addresses the problems which occur when multiple programs running simultaneously attempt to use the audio output of a computer system. Time dependence of sound means that certain auditory messages must be scheduled simultaneously, which can lead to perceptual problems due to psychoacoustic phenomena. Furthermore, the combination of speech and nonspeech audio is examined; each presents its own problems of perceptibility in an acoustic environment composed of multiple auditory streams. The centralized audio presentation manager receives abstract parameterized message requests from the currently running programs, and attempts to create and present a sonic representation in the most perceptible manner through the use of a theoretically and empirically designed rule set.

  5. Centrality in Interconnected Multilayer Networks

    CERN Document Server

    De Domenico, Manlio; Omodei, Elisa; Gómez, Sergio; Arenas, Alex

    2013-01-01

    Real-world complex systems exhibit multiple levels of relationships. In many cases, they require to be modeled by interconnected multilayer networks, characterizing interactions on several levels simultaneously. It is of crucial importance in many fields, from economics to biology, from urban planning to social sciences, to identify the most (or the less) influent nodes in a network. However, defining the centrality of actors in an interconnected structure is not trivial. In this paper, we capitalize on the tensorial formalism, recently proposed to characterize and investigate this kind of complex topologies, to show how several centrality measures -- well-known in the case of standard ("monoplex") networks -- can be extended naturally to the realm of interconnected multiplexes. We consider diagnostics widely used in different fields, e.g., computer science, biology, communication and social sciences, to cite only some of them. We show, both theoretically and numerically, that using the weighted monoplex obta...

  6. PRIMARY CENTRAL NERVOUS SYSTEM LYMPHOMA

    Directory of Open Access Journals (Sweden)

    S.S. Anvari

    2009-08-01

    Full Text Available ObjectivePrimary central nervous system lymphoma (PCNSL is an extremely rare condition in childhood. We report the first case of PCNSL in a child in Iran.Clinical presentationA nine-year-old boy was referred to Mofid Hospital with the history of headache of four months and seizure of 2 months duration. Magnetic resonance imaging of the brain revealed a hyper-intense lesion in left fronto-parietal area with secondary satellite lesions. Biopsy of the brain mass was performed. Pathologic findings showed brain lymphoma and immunohistochemistry confirmed this diagnosis. The treatment started with intrathecal and systemic chemotherapy in combination with radiotherapy.Keywords:Lymphoma, Primary central nervous system lymphoma (PCNSL, Children

  7. A Randomized Central Limit Theorem

    Science.gov (United States)

    Eliazar, Iddo; Klafter, Joseph

    2010-05-01

    The Central Limit Theorem (CLT), one of the most elemental pillars of Probability Theory and Statistical Physics, asserts that: the universal probability law of large aggregates of independent and identically distributed random summands with zero mean and finite variance, scaled by the square root of the aggregate-size (√{n}), is Gaussian. The scaling scheme of the CLT is deterministic and uniform - scaling all aggregate-summands by the common and deterministic factor √{n}. This Letter considers scaling schemes which are stochastic and non-uniform, and presents a "Randomized Central Limit Theorem" (RCLT): we establish a class of random scaling schemes which yields universal probability laws of large aggregates of independent and identically distributed random summands. The RCLT universal probability laws, in turn, are the one-sided and the symmetric Lévy laws.

  8. A Randomized Central Limit Theorem

    International Nuclear Information System (INIS)

    The Central Limit Theorem (CLT), one of the most elemental pillars of Probability Theory and Statistical Physics, asserts that: the universal probability law of large aggregates of independent and identically distributed random summands with zero mean and finite variance, scaled by the square root of the aggregate-size (√(n)), is Gaussian. The scaling scheme of the CLT is deterministic and uniform - scaling all aggregate-summands by the common and deterministic factor √(n). This Letter considers scaling schemes which are stochastic and non-uniform, and presents a 'Randomized Central Limit Theorem' (RCLT): we establish a class of random scaling schemes which yields universal probability laws of large aggregates of independent and identically distributed random summands. The RCLT universal probability laws, in turn, are the one-sided and the symmetric Levy laws.

  9. Central exclusive production at RHIC

    Science.gov (United States)

    Adamczyk, Leszek; Guryn, Włodek; Turnau, Jacek

    2014-11-01

    The present status and future plans of the physics program of Central Exclusive Production (CEP) at RHIC are described. The measurements are based on the detection of the forward protons from the Double Pomeron Exchange (DPE) process in the Roman Pot system and of the recoil system of charged particles from the DPE process measured in the STAR experiment's Time Projection Chamber (TPC). The data described here were taken using polarized proton-proton collisions at √ {s} = 200 GeV. The preliminary spectra of two-pion mass reconstructed by STAR TPC in central region of pseudorapidity |η| < 1, are presented. Near future plans to take data with the current system at center-of-mass energy √ {s} = 200 GeV and plans to upgrade the forward proton tagging system are presented. Also a possible addition of the RPs to the sPHENIX detector is discussed.

  10. Information from the central stores

    CERN Multimedia

    GS Department

    2010-01-01

    All items sold in the CERN shop (Bldg. 33) are now available in the central stores (Bldg. 73) and can be purchased on-line via EDH “Material Request” or at the “Emergency Desk” of the stores on the ground floor of Bldg. 73. These items are visible in the CERN catalogue under the “SCEM” codes beginning with 92. Department of General Infrastructure Services (GS) GS-SEM Group

  11. Central Asian drug trafficking dilemma

    OpenAIRE

    McGowen, Richard S.

    2003-01-01

    Tajikistan, a state that is completely landlocked, consists of very rough terrain that is comprised of mountains, cliffs and glaciers. There are very few transportation links through the area that gives Tajikistan limited access to neighboring countries. Security problems resulting from the increasing flow of narcotics illegally smuggled across the 1200 km Tajikistan- Afghanistan border have become critical in understanding the nature of political instability within Central Asia. This thesis ...

  12. Four Central Points About Coevolution

    OpenAIRE

    Thompson, John N.

    2010-01-01

    Much of evolution is about the coevolution of species with each other. In recent years, we have learned that coevolution is much more pervasive, dynamic, and relentless than we previously thought. There are four central points about coevolution that we should teach the next generation of students to help them understand the importance of the coevolutionary process in shaping the web of life. (1) Complex organisms require coevolved interactions to survive and reproduce. (2) Species-rich ecosys...

  13. CENTRAL ASIA: ECONOMIC COOPERATION POTENTIAL

    OpenAIRE

    Rakhmatullina, Gulnur

    2007-01-01

    The Central Asian republics are rich in energy resources: three of them (Kazakhstan, Uzbekistan, and Turkmenistan) can boast of oil and gas deposits, while the other two (Kyrgyzstan and Tajikistan) have vast hydropower potential. This means that harmonized energy policy designed to meet their demands in energy, energy exports, and stronger positions in ensuring international energy security makes sense. By the same token, these countries can, potentially, develop metallurgy, machine building,...

  14. Central collisions of heavy ions

    International Nuclear Information System (INIS)

    This report describes the activities of the Heavy Ion Physics Group at the University of California, Riverside from October 1, 1991 to September 30, 1992. During this period, the program focused on particle production at AGS energies, and correlation studies at the Bevalac in nucleus-nucleus central collisions. As part of the PHENIX collaboration, contributions were made to the Preliminary Conceptual Design Report (pCDR), and work on a RHIC silicon microstrip detector R ampersand D project was performed

  15. Plague in Central Java, Indonesia

    OpenAIRE

    Williams, J.E.; Hudson, B. W.; Turner, R W; Saroso, J. Sulianti; Cavanaugh, D. C.

    1980-01-01

    Plague in man occurred from 1968 to 1970 in mountain villages of the Boyolali Regency in Central Java. Infected fleas, infected rats, and seropositive rats were collected in villages with human plague cases. Subsequent isolations of Yersinia pestis and seropositive rodents, detected during investigations of rodent plague undertaken by the Government of Indonesia and the WHO, attested to the persistence of plague in the region from 1972 to 1974.

  16. MR findings of central nerocytoma

    International Nuclear Information System (INIS)

    Central neurocytoma is a reae neuronal differentiated intraventricular tomor of young adults. The purpose of this study was to evaluate the characteristic MR appearance of central neurocytoma. We retrospectively reviewed MR images of 12 patients with central neurocytoma, confirmed by ultrastructural and immunohistochemical study. We analyzed patient age, and on all sequences, tumor location, extension into the third ventricle, involvement of brain parenchyma, cyst, hemorrhage, vascular signal void and signal intensity ; and egree of Gd-enhancement was examined on MR images, pattern of calcification on CT, and neovascularity, tumor staining on angiography. Age distribution was wide ranging from 26 to 64 years ; the most frequent age group was the fourth decade (five patients). All tumors except one (in the third ventricle) were located in the lateral ventricle and most were seen in the region of the foramen of Monro (10 cases). Tumors showed extension into the third ventricle and involvement of parenchyma in three cases. The internal architecture of the tumor was heterogenous and consisted of cysts (83%), hemorrhage (25%) and vascular signal void (25%). The solid portion of the tumor showed variable signal intensity on T1-weighted images and iso or high signal intensity on T2- and proton density-weighted images. On MR imaging, mild to moderate heterogenous Gd-enhancement was seen in ten cases (83%), and on CT, a spotted, amorphous, nodular pattern of calcifications was seen in seven cases (63%). On angiography, neovasevlarity and tumor staining was seen in three cases (100%). The typical location of the lateral and third ventricles and MR imaging characteristics including variable signal intensity and heterogenous internal architecture are helpful in the diagnosis of central neurocytoma in young adults

  17. Seismotectonic model of Central Europe

    International Nuclear Information System (INIS)

    Earthquakes belong to natural disasters which are associated with tectonic processes in the interior of the Earth. They are extremely devastating in populated areas; they cause human losses and damage personal estates and the environment. To mitigate the potential effects of earthquakes it is necessary that relief and mitigation structures operate following an earthquake, but it is also essential to stimulate and enhance preparedness and prevention. Prevention includes the development of scenarios of potential earthquakes, hazard mapping, formulation of regulations, etc. Preparedness includes the installation and operation of warning systems, establishing communication networks to operate before, during, and after earthquakes. As nuclear technology belongs to high-risk technologies with regard to human health and the environment and its hazard substantially increases in consequence of earthquakes, in the siting of a nuclear plant engineering solutions are generally available to mitigate the potential vibratory effects through design. For the choice of a suitable engineering solution, reliable data must be processed by reliable techniques. The IAEA safety guide of the safety series No. 50-SG-S1(Rev. 1) specifies the demands on data and on their processing and also on the regional seismotectonic model. With a view of this the regional seismotectonic model of Central Europe was created. The paper presents regional geological characteristics of Central Europe and a chronological model of neotectonic movements in Central Europe with specification of neotectonic regional units and their present movements. Moreover, it contains earthquake characteristics for Central Europe and the specification of seismogenic movements. It was found that the genesis of local regions with occurrence of the strongest earthquakes is connected with several movement trends in the last 5 Ma. Six more or less tectonically separate regional units were revealed. The earthquake epicenters often

  18. Political centralization and government accountability

    OpenAIRE

    Boffa, Federico; Piolatto, Amedeo; Giacomo A. M. Ponzetto

    2011-01-01

    This paper explains why decentralization can undermine accountability and answers three questions: what determines if power should be centralized or decentralized when regions are heterogeneous? How many levels of government should there be? How should state borders be drawn? We develop a model of political agency in which voters differ in their ability to monitor rent-seeking politicians. We find that rent extraction is a decreasing and convex function of the share of informed...

  19. Optimal Central Counterparty Risk Management

    OpenAIRE

    Philipp Haene; Andy Sturm

    2009-01-01

    In order to protect themselves against the potential losses in case of a participant's default and to contain systemic risk, central counterparties (CCPs) need to maintain sufficient financial resources. Typically, these financial resources consist of margin requirements and contributions to a collective default fund. Based on a stylized model of CCP risk management, this article analyzes the main factors affecting the trade-off between margins and default fund. The optimal balance between th...

  20. Wine markets in central Europe

    OpenAIRE

    Š BOJNEC

    2013-01-01

    This paper analyses the tendencies of grapes growing, wine trading and wine price competitiveness in Central European region. Croatia is net exporter of wines, Hungary is net exporter of grapes and wines, and Austria, Slovakia, and Slovenia are net importers of grapes and wines. Reductions in vineyards and increase in yields are found for Austria, Hungary, and Slovakia. More stable developments in vineyards, but decline in yields, are found for Croatia and Slovenia. Grape production increases...

  1. Central nervous system mesenchymal chondrosarcoma

    International Nuclear Information System (INIS)

    Central nervous system mesenchymal chondrosarcomas are rare malignant tumors that constitute a separate entity from the classical chondrosarcoma and myxoid variant. Clinical behaviour of central nervous system chondrosarcomas is still unknown. We describe two rare examples of intracranial mesenchymal chondrosarcoma with a review of the literature, in an attempt to clarify the clinical characteristics, prognosis and treatment of choice of these unusual tumors. Among the 55 reported cases, 23 had postoperative radiotherapy. Although there is no statistical significance according to the Log-Rank test (p=0.7), the patients treated with radiation therapy seem to have a better chance of survival. Patients who had adjuvant chemotherapy (only 5) showed survival times similar to those patients who had none. Although clinical behaviour of central nervous system chondrosarcomas remains to be defined, data from our series as well as literature show that radical removal is the best therapeutic choice. In addition, patients treated with postoperative radiotherapy seem to show a trend toward increased survival

  2. Sustaining volcanism in Central Kamchatka

    Science.gov (United States)

    Nikulin, Alex

    Flux-induced melting in the mantle wedge acts as the driving mechanism of arc volcanism in subduction zone environments. The primary control on the geographical position of arc volcanic centers is the depth of the subducting plate beneath the overriding plate. Globally, the average depth to the subducting plate beneath volcanic arcs is estimated at ˜100km. Volcanoes of the Central Kamchatka Depression in Eastern Russia comprise the most active volcanic arc system in the world with the depth of the subducting Pacific plate beneath the arc estimated at 180-200km, greatly in excess of the global average. In my research I attempt to describe the special tectonic circumstances that explain the deviation of the subduction depth constraint on arc volcanism in Central Kamchatka. In my study I rely on geophysical and geochemical data and petrological modeling to propose a new geodynamic model to explain voluminous volcanic activity in Central Kamchatka. In the initial stage of the study I conducted a geophysical investigation using receiver function methodology to map and describe the contact of the subducting Juan de Fuca Plate in the well-instrumented Cascadia subduction zone. I calculated and compiled a database of receiver function profiles from stations along the extent of the Cascadia forearc and mapped a low velocity anisotropic zone proposed to be serpentinized material along the forearc axis. In the second stage of my study I applied a similar methodology to describe the sub-crustal structure of Central Kamchatka. Results of this effort suggested presence of a low-velocity zone in the upper mantle separate from the subducting Pacific plate. I proceeded to investigate the tectonic origin of this feature in the final stage of my dissertation work with the use of receiver function migration, geochemical analysis and petrological modeling. I was able to further constrain the position of the low velocity anomaly and derive geochemical and petrological evidence linking

  3. Central hypersensitivity in chronic musculoskeletal pain

    DEFF Research Database (Denmark)

    Curatolo, Michele; Arendt-Nielsen, Lars

    2015-01-01

    Clinical research has consistently detected alteration in central pain processing leading to hypersensitivity. Most methods used in humans are reliable and have face validity to detect widespread central hypersensitivity. However, construct validity is difficult to investigate due to lack of gold...... standards. Reference values in the pain-free population have been generated, but need replication. Research on pain biomarkers that reflect specific central hypersensitivity processes is warranted. Few studies have analyzed the prognostic value of central hypersensitivity. Most medications acting at central...... level and some non-pharmacological approaches, including psychological interventions, are likely to attenuate central hypersensitivity....

  4. From Centrality to Temporary Fame: Dynamic Centrality in Complex Networks

    CERN Document Server

    Braha, D; Braha, Dan; Bar-Yam, Yaneer

    2006-01-01

    We develop a new approach to the study of the dynamics of link utilization in complex networks using records of communication in a large social network. Counter to the perspective that nodes have particular roles, we find roles change dramatically from day to day. "Local hubs" have a power law degree distribution over time, with no characteristic degree value. Our results imply a significant reinterpretation of the concept of node centrality in complex networks, and among other conclusions suggest that interventions targeting hubs will have significantly less effect than previously thought.

  5. Kalmanovitz y la Banca central / Kalmanovitz and central banking

    OpenAIRE

    Maya Muñoz, Guillermo

    2004-01-01

    Salomón Kalmanovitz, Codirector del Banco de la República (B de la R) hasta enero de 2005, uno de los economistas colombianos más brillantes, publicó un libro titulado Ensayos sobre Banca Central, Comportamiento, Independencia e Historia (Norma, 2003). Si los estudiantes de economía de los años 70 y 80 estudiaron a un Kalmanovitz marxista, los estudiantes de hoy estudian a un economista ortodoxo y liberal, igualmente brillante. Kalmanovitz es un partidario de la independencia de la BC para la...

  6. CHINA AND ENERGY SECURITY IN CENTRAL ASIA

    OpenAIRE

    Guang, PAN

    2007-01-01

    This paper is divided into three parts: China’s energy policy and energy development strategy; Central Asia’s significance for China’s overseas energy development strategy; and Central Asia’s energy security and energy development.

  7. Biomass energy in Central America

    International Nuclear Information System (INIS)

    The objective of this paper is to introduce the concept of biomass to energy issues and opportunities in Central America. In this region, made up of seven countries (Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua and Panama), the biomass sector has the potential to play a crucial role in alleviating the environmental and development predicaments faced by all economies of the region. This paper assesses the available biomass resources at the regional and country levels and gives an overview of the current utilization of biomass fuels. It also describes the overall context in which the biomass-to-energy initiatives are immersed. At the regional level, biomass energy consumption accounts for more than 50% of total energy consumption. In regard to the utilization of biomass for energy purposes, it is clear that Central America faces a critical juncture at two levels, both mainly in rural areas: in the productive sector and at the household level. The absence of sustainable development policies and practices has jeopardized the availability of biomass fuels, particularly wood. Firewood is an important source of energy for rural industries such as coffee processing, which is one of the largest productive activities in the region. This paper comments on some of the most successful technological innovations already in place in the region, for instance, the rapid development of co-generation projects by the sugar cane industry, especially in El Salvador and Guatemala, the substitution of coffee husks for firewood in coffee processing plants in Costa Rica and El Salvador and the sustainable use of pine forests for co-generation in Honduras. Only one out of every two inhabitants in Central America now has access to electricity from the public grid. Biomass fuels, mainly firewood but also, to a lesser extent, other crop residues such as corn stalks, are the main source of energy for cooking and heating by most of the population. (It is foreseen that by the end

  8. Neurocitoma no sistema nervoso central

    Directory of Open Access Journals (Sweden)

    José Torquato Severo

    1973-03-01

    Full Text Available É relatado o caso de uma paciente com 6 anos de idade, hospitalizada com síndrome de hipertensão intracraniana. Após o exame neuro-radiológico que evidenciou processo expansivo frontal direito, a paciente foi submetida à cirurgia, durante a qual ocorreu o óbito. O exame histo-patológico do material retirado durante o ato operatório, permitiu o diagnóstico de neurocitoma, tumor raro no sistema nervoso central.

  9. The ZEUS central tracking detector

    International Nuclear Information System (INIS)

    The Central Tracking Detector (CTD) of ZEUS covers a wide angular range, whilst the Forward Detector - comprising the Forward Tracking Detector (FTD) and electron identification by transition radiation - concentrates on the important forward cone. The RTD (Rear Tracking Detector) provides accurate angle measurement of the recoil electron and the vertex detector (VXD) aims to find particles from heavy flavour decay. To measure momentum accurately the CTD sits in a high magnetic field (B=1,8 T) within the ZEUS calorimeter. (orig./HSI)

  10. Central Clearing of OTC Derivatives

    DEFF Research Database (Denmark)

    Cont, Rama; Kokholm, Thomas

    2014-01-01

    netting agreements. When a CCP exists for interest rate derivatives, adding a CCP for credit derivatives is shown to decrease overall exposures. These findings are shown to be robust to the statistical assumptions of the model as well as the choice of risk measure used to quantify exposures....... classes are realistically taken into account. We argue that empirically plausible specifications of model parameters lead to the conclusion that central clearing does reduce interdealer exposures: the gain from multilateral netting in a CCP overweighs the loss of netting across asset classes in bilateral...

  11. Legal and actual central bank independence

    OpenAIRE

    Artha, I.K.D.S.; J. de Haan

    2010-01-01

    Indicators of central bank independence (CBI) based on the interpretation central bank laws in place may not capture the actual independence of the central bank. This paper develops an indicator of actual independence of the Bank Indonesia (BI), the central bank of Indonesia, for the period 1953-2008 and compares it with a new legal CBI indicator based on Cukierman (1992). The indicator of actual independence captures institutional and economic factors that affect CBI. We find that before 199...

  12. Distributed trace using central performance counter memory

    Science.gov (United States)

    Satterfield, David L.; Sexton, James C.

    2013-01-22

    A plurality of processing cores, are central storage unit having at least memory connected in a daisy chain manner, forming a daisy chain ring layout on an integrated chip. At least one of the plurality of processing cores places trace data on the daisy chain connection for transmitting the trace data to the central storage unit, and the central storage unit detects the trace data and stores the trace data in the memory co-located in with the central storage unit.

  13. Evidence for Central Regulation of Glucose Metabolism*

    OpenAIRE

    Carey, Michelle; Kehlenbrink, Sylvia; Hawkins, Meredith

    2013-01-01

    Evidence for central regulation of glucose homeostasis is accumulating from both animal and human studies. Central nutrient and hormone sensing in the hypothalamus appears to coordinate regulation of whole body metabolism. Central signals activate ATP-sensitive potassium (KATP) channels, thereby down-regulating glucose production, likely through vagal efferent signals. Recent human studies are consistent with this hypothesis. The contributions of direct and central inputs to metabolic regulat...

  14. "Christofest" New Yorgi Central Parkis / Rael Artel

    Index Scriptorium Estoniae

    Artel, Rael, 1980-

    2004-01-01

    12. II 2005. a. avatakse Christo ja Jeanne-Claude'i keskkonnainstallatsioon "The Gates" New Yorgi Central Parkis. Paralleelselt toimub Metropolitan Muuseumis näitus "Christo and Jeanne-Claude : The Gates, Central Park, New York", kus eksponeeritakse Central Parki installatsiooni ettevalmistavaid materjale: joonistusi, diagramme, fotosid jne

  15. Hazardous pesticides in Central America.

    Science.gov (United States)

    Wesseling, C; Aragón, A; Castillo, L; Corriols, M; Chaverri, F; de la Cruz, E; Keifer, M; Monge, P; Partanen, T J; Ruepert, C; van Wendel de Joode, B

    2001-01-01

    Pesticides are an extensively documented occupational and environmental hazard in Central America. Yet, severe problems persist. Toxic pesticide use in the Region increased during 1985-1999. High exposure levels and ineffectiveness of personal protective equipment evidence the difficulties for risk reduction. Acute poisonings remain a severe problem. Delayed and/or long-lasting health effects include dermatoses, cancer, and genotoxic, neurotoxic, and respiratory effects. The use of hazardous pesticides persists through deficiencies in government-driven assessment and risk management; excessive focus on regional harmonization; short-term economic interests; strong links between industry and governments; aggressive marketing; weak trade unions; and failure of universities to reach decision makers. Regulation based on local data is lacking. An agreement of the Ministries of Health for restricting the most toxic pesticides in Central America has potential for progress. The most effective way to reduce risk is to greatly reduce pesticide use. Actions needed include development of multidisciplinary strategies for local studies on health and environmental impact of pesticides; development of sustainable nonchemical agricultural technologies; evaluation of interventions; extending and sharing of expertise within the Region; strengthening of unions and communities; and redefining the role of industry toward development of safer products, with responsible marketing and reliable information. PMID:11783858

  16. Central and forward tracking collaboration

    International Nuclear Information System (INIS)

    The goal of this subsystem R ampersand D project is to carry out a detailed study and design of a complete wire chamber tracking system covering pseudorapidity |η| ≤ 2.5 in a solenoidal detector for the SSC. Most of our group are now part of the Solenoidal Detector Collaboration (SDC), so the work has evolved into developing a tracking system conceptual design for the SDC detector. The design discussed in this report uses straw tube drift chambers for the central tracking region. Because of the high rates in the SSC environment, a small cell design is needed for wire chambers in the central region. Straw tubes as small cells offer many advantages because the sense wire is enclosed in a continuous cathode, and the wire tension due to the sense wire only can be supported without a massive structure. The straw tubes are grouped together to form superlayers in order to provide local track segments. The superlayers are composed of modules consisting of about two hundred straw tubes enclosed in a carbon fiber composite shell. Straw tubes have been used in previous experiments for small vertex drift chambers. However, they have never before been used for a large tracking system

  17. Central Solenoid Insert Technical Specification

    Energy Technology Data Exchange (ETDEWEB)

    Martovetsky, Nicolai N [ORNL; Smirnov, Alexandre [ORNL

    2011-09-01

    The US ITER Project Office (USIPO) is responsible for the ITER central solenoid (CS) contribution to the ITER project. The Central Solenoid Insert (CSI) project will allow ITER validation the appropriate lengths of the conductors to be used in the full-scale CS coils under relevant conditions. The ITER Program plans to build and test a CSI to verify the performance of the CS conductor. The CSI is a one-layer solenoid with an inner diameter of 1.48 m and a height of 4.45 m between electric terminal ends. The coil weight with the terminals is approximately 820 kg without insulation. The major goal of the CSI is to measure the temperature margin of the CS under the ITER direct current (DC) operating conditions, including determining sensitivity to load cycles. Performance of the joints, ramp rate sensitivity, and stability against thermal or electromagnetic disturbances, electrical insulation, losses, and instrumentation are addressed separately and therefore are not major goals in this project. However, losses and joint performance will be tested during the CSI testing campaign. The USIPO will build the CSI that will be tested at the Central Solenoid Model Coil (CSMC) Test Facility at the Japan Atomic Energy Agency (JAEA), Naka, Japan. The industrial vendors (the Suppliers) will report to the USIPO (the Company). All approvals to proceed will be issued by the Company, which in some cases, as specified in this document, will also require the approval of the ITER Organization. Responsibilities and obligations will be covered by respective contracts between the USIPO, called Company interchangeably, and the industrial Prime Contractors, called Suppliers. Different stages of work may be performed by more than one Prime Contractor, as described in this specification. Technical requirements of the contract between the Company and the Prime Contractor will be covered by the Fabrication Specifications developed by the Prime Contractor based on this document and approved by

  18. 76 FR 22746 - Wiregrass Central Railway, LLC-Acquisition and Operation Exemption-Wiregrass Central Railroad...

    Science.gov (United States)

    2011-04-22

    ... Surface Transportation Board Wiregrass Central Railway, LLC--Acquisition and Operation Exemption--Wiregrass Central Railroad Company, Inc. Wiregrass Central Railway, LLC (WCR), a noncarrier, has filed a verified notice of exemption under 49 CFR 1150.31 to acquire from Wiregrass Central Railroad Company,...

  19. Central Exclusive Production at LHCb

    CERN Document Server

    McNulty, Ronan

    2016-01-01

    Central Exclusive Production (CEP) is a unique process at hadron machines in which particles are produced via colourless propagators. LHCb have measured the cross-sections for the CEP of vector mesons, $J/\\psi,\\psi(2S),\\Upsilon(1S),\\Upsilon(2S)$ and $\\Upsilon(3S)$, which are photo-produced. In the double pomeron exchange process, preliminary measurements have been made of $\\chi_{c0},\\chi_{c1}, \\chi_{c2}$ meson production while the first observations of the CEP of pairs of charmonia, $J/\\psi J/\\psi$ and $J/\\psi \\psi(2S)$, have been made and limits obtained on the pair production of other charmonia.

  20. WINE MARKETS IN CENTRAL EUROPE

    Directory of Open Access Journals (Sweden)

    Š BOJNEC

    2007-04-01

    Full Text Available This paper analyses the tendencies of grapes growing, wine trading and wine price competitiveness in Central European region. Croatia is net exporter of wines, Hungary is net exporter of grapes and wines, and Austria, Slovakia, and Slovenia are net importers of grapes and wines. Reductions in vineyards and increase in yields are found for Austria, Hungary, and Slovakia. More stable developments in vineyards, but decline in yields, are found for Croatia and Slovenia. Grape production increases in Austria, remains stable in Croatia, explores annual oscillations in Hungary, and declines in Slovakia and Slovenia. Export-to-import wine prices deteriorate for Austria and Hungary with most recent stabilization and price similarity, which hold also for Slovakia. Slovenian export-to-import wine prices are unstable, while Croatia experiences a bit higher export than import wine prices. Wine marketing, wine brand image of quality, and wine tourism are seen as tools to improve competitiveness in the wine sector.

  1. Fermilab central helium liquefier operations

    International Nuclear Information System (INIS)

    This chapter discusses the use of liquid helium to cool the Fermilab superconducting accelerator. Liquid from the Central Helium Liquefier (CHL) is transported in a six kilometer circular transfer line and each satellite withdraws the amount required to boost its refrigeration capacity to the necessary level. Topics considered include the compressor, the heater, the control system, gas storage, liquid storage, the nitrogen reliquefier, gas purification, initial and early operation, and recent operation. The liquid helium is warmed to near ambient temperature in the satellite heat exchangers. The satellite compressors return the excess inventory to the CHL via a 20 bar gas header. This gas is injected into the high pressure supply to the cold box. Some turbine instabilities have been experienced, including the destruction of a turbine during the initial start-up

  2. Banco Central de Costa Rica

    Directory of Open Access Journals (Sweden)

    Sauter, Franz

    1963-06-01

    Full Text Available This new building is intended to house the various services of the Central Bank of Costa Rica. It has a prestressed concrete structure, and consists of a basement parking space for 105 vehicles, and nine storeys, providing altogether a floor surface of 12,000 ms2. The building rests on a ground area of 40 by 60 ms, and the main structure occupies 22 by 45 ms. This Bank is located in a district of narrow streets, but its main side overlooks a green open space, which will improve its visibility and appearance. The building structure is made up of a framework of prestressed beams and columns. The beams have been concreted at the site, and the joists, which are also prestressed, are factory made. This framework, at each floor level, constitutes the basis of a continuous slab, which renders the total structure exceedingly stiff. The main continuous girders span 11.22 ms spaces, and vary in cross section. The prestressing reinforcements consist of 6 Loeba type cables. This is an original design by Dr. Leonhardt, in which the cables are placed on three horizontal layers, of parabolic outline. Each cable is made up of 12 x 5.4 mm wires, with a breaking stress of 180 kg/mm2 The tensioning stress was 108 kg/mm2, and the total prestress load is 29,700 kgs. The cables run in corrugated metal tubes, and these were kept in precise position with the aid of distance pieces.El nuevo edificio, destinado a agrupar los servicios del Banco Central de Costa Rica, está constituido por una estructura de hormigón pretensado. El inmueble dispone de un sótano, estacionamiento propio para 105 vehículos y nueve plantas, con una superficie total de 12.000 metros cuadrados. Se asienta sobre una base de 40x60 m, donde se levanta un núcleo central de 22x45 metros. Está situado en un barrio de calles estrechas, pero tiene su fachada, principal frente a una zona verde que le proporcionará mayor categoría y visibilidad. La estructura se compone de una retícula de vigas

  3. Hirsch index as a network centrality measure

    CERN Document Server

    Campiteli, Monica G; Soles, Paulo R C; Soares, Leonardo H D; Kinouchi, Osame

    2010-01-01

    We study the h Hirsch index as a local node centrality measure for complex networks in general. The h index is compared with the Degree centrality (a local measure), the Betweenness and Eigenvector centralities (two non-local measures) in the case of a biological network (Yeast interaction protein-protein network) and a linguistic network (Moby Thesaurus II) as test environments. In both networks, the Hirsch index has poor correlation with Betweenness centrality but correlates well with Eigenvector centrality, specially for the more important nodes that are relevant for ranking purposes, say in Search Machine Optimization. In the thesaurus network, the h index seems even to outperform the Eigenvector centrality measure as evaluated by simple linguistic criteria.

  4. Reduced central blood volume in cirrhosis

    DEFF Research Database (Denmark)

    Bendtsen, F; Henriksen, Jens Henrik Sahl; Sørensen, T I; Stadeager, C; Ring-Larsen, H

    1989-01-01

    The pathogenesis of ascites formation in cirrhosis is uncertain. It is still under debate whether the effective blood volume is reduced (underfilling theory) or whether the intravascular compartment is expanded (overflow theory). This problem has not yet been solved because of insufficient tools...... for measuring the central blood volume. We have developed a method that enables us to determine directly the central blood volume, i.e., the blood volume in the heart cavities, lungs, and central arterial tree. In 60 patients with cirrhosis and 16 control subjects the central blood volume was assessed...... according to the kinetic theory as the product of cardiac output and mean transit time of the central vascular bed. Central blood volume was significantly smaller in patients with cirrhosis than in controls (mean 21 vs. 27 ml/kg estimated ideal body weight, p less than 0.001; 25% vs. 33% of the total blood...

  5. Central sleep apnea – a case report

    OpenAIRE

    Dybala Andrzej; Dyczko Monika; Makaruk Boguslaw; Kicinski Pawel; Bartoszek Elzbieta; Myslinski Wojciech; Rahnama Mansur; Mosiewicz Jerzy

    2014-01-01

    Central sleep apnea (CSA) is a disease characterized by repetitive episodes of the socalled central apneas during sleep. The disease has a very complex etiology. In clinical practice, the most important causes of CSA are disorders of the central nervous system, congestive heart failure or certain pathological changes of the respiratory muscles. We present a case of a 43-year-old male with severe CSA, who was successfully treated with BiPAP ST equipment.

  6. Central sleep apnea – a case report

    Directory of Open Access Journals (Sweden)

    Dybala Andrzej

    2014-06-01

    Full Text Available Central sleep apnea (CSA is a disease characterized by repetitive episodes of the socalled central apneas during sleep. The disease has a very complex etiology. In clinical practice, the most important causes of CSA are disorders of the central nervous system, congestive heart failure or certain pathological changes of the respiratory muscles. We present a case of a 43-year-old male with severe CSA, who was successfully treated with BiPAP ST equipment.

  7. Clarity of Central Bank Communication About Inflation

    OpenAIRE

    Ales Bulir; David-Jan Jansen; Martin Cihak

    2011-01-01

    This paper examines whether the clarity of central bank communication about inflation has changed with the economic environment. We use readability statistics and content analysis to study the clarity of communication on the inflation outlook by seven central banks between 1997 and 2010. Overall, we find no strong indications that central banks were less clear in explaining their policies when faced with higher uncertainty or a less favorable inflation outlook. The global financial crisis, ho...

  8. 2. The Central American gang phenomenon

    OpenAIRE

    Does, Antonia

    2013-01-01

    2.1. Differentiating between pandillas and maras Youth gangs have existed since the 1960s and 1970s in Central America. However, there are different types of Central American gangs and thus one has to distinguish between pandillas and maras. The former are localized, homegrown gangs, which are “direct inheritors” (Jütersonke, Rodgers & Muggah 2009: 379) of the gangs that have historically characterized Central American societies, while the latter are a more recent phenomenon with transnationa...

  9. Central Neurogenic Respiratory Failure: A Challenging Diagnosis

    OpenAIRE

    Carvalho, Flávio A.; Bernardino, Tenille; Maciel, Ricardo O.H.; Felizola, Sérgio F.A.; Costa, Eduardo L.V.; Silva, Gisele S

    2011-01-01

    Background Central nervous system lesions are rare causes of respiratory failure. Simple observation of the breathing pattern can help localize the lesion, but the examiner needs to be aware of potential pitfalls such as metabolic or pulmonary alterations. Methods We describe 3 cases in which central neurogenic respiratory failure occurred simultaneously with other alterations or in an unusual presentation. Results All patients were diagnosed with central neurogenic respiratory failure and tr...

  10. Managing human resources - a central bank perspective

    OpenAIRE

    Donna Hickey; Geof Mortlock

    2002-01-01

    The adage that "people are our greatest asset" has been a recurrent theme in many businesses and organisations through history. This is no less true for a central bank. Indeed, people are, without doubt, a central bank's most important resource. Our business relies heavily on the expertise, experience and sound judgement of our staff. A central bank's effectiveness crucially depends on its credibility, and this in turn largely comes down to the quality of its staff. Therefore, managing human ...

  11. Transparency in Central Bank Financial Statement Disclosures

    OpenAIRE

    Kenneth Sullivan

    2000-01-01

    The IMF's development of the Code of Good Practices on Transparency in Monetary and Financial Policies and the introduction of safeguards assessments have increased emphasis on transparency of the disclosures made in central bank financial statements. This paper, which updates WP/00/186, looks at the disclosure requirements for central banks under International Financial Reporting Standards and provides practical guidance for those responsible for preparing central bank financial statements.

  12. On the Central Coefficients of Riordan Matrices

    OpenAIRE

    Barry, Paul

    2013-01-01

    We use the Lagrange-Bürmann inversion theorem to characterize the generating function of the central coefficients of the elements of the Riordan group of matrices. We apply this result to calculate the generating function of the central elements of a number of explicit Riordan arrays, defined by rational expressions, and in two cases we use the generating functions thus found to calculate the Hankel transforms of the central elements, which are themselves expressible as combinatorial polynomi...

  13. Urban history and modernity in Central Europe

    OpenAIRE

    Klautke, E. F.

    2010-01-01

    This historiographical review discusses recent literature on cities in modern Central Europe – mainly on Berlin and Vienna – which reflects the great variety of approaches to urban history and underlines the importance of urban history for the study of modernity. The history of urbanisation was a central event in the history of modernity. Especially in the Central European capitals of Berlin and Vienna, where modernisation and urban growth started later and then advanced quicker than in West ...

  14. Central banking and the economics of information

    OpenAIRE

    Green, Edward J.

    2001-01-01

    This article concerns the potential relevance of information technology to three aspects of central banking: setting the objectives of monetary policy, ensuring the integrity and security of financial system infrastructure, and maintaining the transparency of decision-making. Regarding integrity and security of infrastructure, a revised role for central banks may be appropriate. However, recent innovations in technology and advances in learning confirm the wisdom of central banks' efforts to ...

  15. The Information Value of Central School Exams

    OpenAIRE

    Schwerdt, Guido; Woessmann, Ludger

    2015-01-01

    The central vs. local nature of high-school exit exam systems can have important repercussions on the labor market. By increasing the informational content of grades, central exams may improve the sorting of students by productivity. To test this, we exploit the unique German setting where students from states with and without central exams work on the same labor market. Our difference-in-difference model estimates whether the earnings difference between individuals with high and low grades d...

  16. Transpleural central venous catheter discovered during thoracotomy

    OpenAIRE

    Ashima Malhotra; Prakash Sharma; Ashvini Kumar; Nikhil Malhotra

    2014-01-01

    We report an uncommon complication of subclavian central venous catheterization, discovered at thoracotomy. The central venous catheter (CVC) was placed by left infraclavicular route after induction of general anesthesia. CVC was secured after aspiration of blood and satisfactory central venous tracing. On thoracotomy, CVC was noticed to traverse the pleural cavity while the tracing was normal. CVC was thus removed consequent to which bleeding from each puncture site was noticed, that were se...

  17. The Centrality of Organization Design

    Directory of Open Access Journals (Sweden)

    Raymond E. Miles

    2012-05-01

    Full Text Available I am excited about this new journal focused on the subject of organization design. In my view, organization design is a central issue in the field of management. Designing an organization requires an understanding of strategy, as we pointed out some time ago (Miles & Snow, 1978. For example, if you want to be a prospector (a first-mover strategy, you have to design your firm to move quickly in new directions, which is likely to require that it be arranged so that various kinds of teams can interact across organizational units and levels. Designing an organization to follow a first-mover strategy also requires both an understanding of leadership and a commitment to the free flow of information throughout the organization. Leaders must understand how cross-functional teams pursue ideas and opportunities, and they must facilitate collaborative knowledge sharing to drive innovations that help the firm operate entrepreneurially. Because an organization is a complex, dynamic system, perhaps no other single topic is so deeply implanted at the core of management, organization theory, and organizational behavior as organization design. Moreover, organization design once was, and could be again, the topic of an ongoing dialogue between managers and academics focused on business organizations.

  18. Central nervous system tuberculosis: MRI

    International Nuclear Information System (INIS)

    The MRI findings of 18 proven cases of central nervous system (CNS) tuberculosis were reviewed; 10 patients were seropositive for HIV. All had medical, laboratory, or surgical proof of CNS tuberculosis. Eleven patients had meningitis, of whom two also had arachnoiditis. Five patients had focal intra-axial tuberculomas: four brain masses and one an intramedullary spinal lesion. Two patients had focal extra-axial tuberculomas: one in the pontine cistern, and one in the spine. In all 11 patients with meningitis MRI showed diffuse, thick, meningeal enhancement. All intraparenchymal tuberculomas showed low signal intensity on T2-weighted images and ring or nodular enhancement. The extra-axial tuberculomas had areas isointense or hypointense relative to normal brain and spinal cord on T2-weighted images. Although tuberculous meningitis cannot be differentiated from other meningitides on the basis of MR findings, intraparenchymal tuberculomas show characteristic T2 shortening, not found in most other space-occupying lesions. In the appropriate clinical setting, tuberculoma should be considered. (orig.)

  19. A Central Theory of Biology

    Science.gov (United States)

    Torday, John S.

    2015-01-01

    The history of physiologic cellular–molecular interrelationships can be traced all the way back to the unicellular state by following the pathway formed by lipids ubiquitously accommodating calcium homeostasis, and its consequent adaptive effects on oxygen uptake by cells, tissues and organs. As a result, a cohesive, mechanistically integrated view of physiology can be formulated by recognizing the continuum comprising conception, development, physiologic homeostasis and death mediated by soluble growth factor signaling. Seeing such seemingly disparate processes as embryogenesis, chronic disease and dying as the gain and subsequent loss of cell–cell signaling provides a novel perspective for physiology and medicine. It is emblematic of the self-organizing, self-referential nature of life, starting from its origins. Such organizing principles obviate the pitfalls of teleologic evolution, conversely providing a way of resolving such seeming dichotomies as holism and reductionism, genotype and phenotype, emergence and contingence, proximate and ultimate causation in evolution, cells and organisms. The proposed approach is scale-free and predictive, offering a Central Theory of Biology. PMID:25911556

  20. Towards a centralized Grid Speedometer

    International Nuclear Information System (INIS)

    Given the distributed nature of the Worldwide LHC Computing Grid and the way CPU resources are pledged and shared around the globe, Virtual Organizations (VOs) face the challenge of monitoring the use of these resources. For CMS and the operation of centralized workflows, the monitoring of how many production jobs are running and pending in the Glidein WMS production pools is very important. The Dashboard Site Status Board (SSB) provides a very flexible framework to collect, aggregate and visualize data. The CMS production monitoring team uses the SSB to define the metrics that have to be monitored and the alarms that have to be raised. During the integration of CMS production monitoring into the SSB, several enhancements to the core functionality of the SSB were required; They were implemented in a generic way, so that other VOs using the SSB can exploit them. Alongside these enhancements, there were a number of changes to the core of the SSB framework. This paper presents the details of the implementation and the advantages for current and future usage of the new features in SSB.

  1. A partitioned central solar receiver

    International Nuclear Information System (INIS)

    Else of solar energy as substitute for conventional fuels at a competitive cost requires efficient conversion from solar radiation to usable forms of energy. In solar thermal or thermochemical applications, high efficiency usually re- quires high temperature and high concentration of incoming radiation. The main form of energy loss from high temperature solar central receivers is thermal emission ('re radiation'), at an effective temperature close to the maximum receiver temperature. This loss is reduced if the aperture is divided into segments, most of which are maintained at lower temperatures. A two-stage partitioned receiver demonstrating this concept is under construction at the Weizman Solar Tower. The high-temperature stage is the DIAPR (Directly Irradiated Annular Pressurized Receiver). The low-temperature stage is made of tubular cavity receivers of simpler design. Preliminary optical and thermal design of the partitioned receiver is presented. For the design exit temperature of 1500 K, the aperture size of the partitioned receiver is about 60% of the equivalent single-stage receiver, indicating a significant increase of conversion efficiency. The exit temperature of the low-temperature stage is around 1100 K, allowing simpler design and inexpensive construction. (authors)

  2. Conductivity Anomalies in Central Europe

    Science.gov (United States)

    Neska, Anne

    2016-01-01

    This paper is a review of studies which, by applying the magnetotelluric, geomagnetic deep sounding, and magnetovariational sounding methods (the latter refers to usage of the horizontal magnetic tensor), investigate Central Europe for zones of enhanced electrical conductivity. The study areas comprise the region of the Trans-European Suture Zone (i.e. the south Baltic region and Poland), the North German Basin, the German and Czech Variscides, the Pannonian Basin (Hungary), and the Polish, Slovakian, Ukrainian, and Romanian Carpathians. This part of the world is well investigated in terms of data coverage and of the density of published studies, whereas the certainty that the results lead to comprehensive interpretations varies within the reviewed literature. A comparison of spatially coincident or adjacent studies reveals the important role that the data coverage of a distinct conductivity anomaly plays for the consistency of results. The encountered conductivity anomalies are understood as linked to basin sediments, asthenospheric upwelling, large differences in lithospheric age, and—this concerns most of them, which all concentrate in the middle crust—tectonic boundaries that developed during all mountain building phases that have taken place on the continent.

  3. Pyramidal central configurations and perverse solutions

    OpenAIRE

    Zhifu Xie; Shiqing Zhang

    2004-01-01

    For $n$-body problems, a central configuration (CC) plays an important role. In this paper, we establish the relation between the spatial pyramidal central configuration (PCC) and the planar central configuration. We prove that the base of PCC is also a CC and we also prove that for some given conditions a planar CC can be extended to a PCC. In particular, if the pyramidal central configuration has a regular polygon base, then the masses of base are equal and the distance between the top vert...

  4. The primary Maxillary Central Incisor in the Solitary Median Maxillary Central Incisor syndrome

    DEFF Research Database (Denmark)

    Kjaer, I; Balslev-Olesen, M

    2012-01-01

    Solitary Median Maxillary Central Incisor (SMMCI) is a developmental anomaly in the permanent dentition with one single central incisor in the maxilla, positioned exactly in the midline. This condition has been associated with extra- and intraoral malformations in the frontonasal segment of the...... cranium and face. It is not known whether the centrally located permanent incisor is always preceded by a centrally located primary incisor. The aim was to analyse whether a permanent single central incisor in SMMCI is always preceded by a primary single central incisor and to study extra- and intraoral...

  5. Digital data sets that describe aquifer characteristics of the Central Oklahoma aquifer in central Oklahoma

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digitized polygons of a constant recharge value for the Central Oklahoma aquifer in central Oklahoma. This area encompasses all or part of...

  6. Digital data sets that describe aquifer characteristics of the Central Oklahoma aquifer in central Oklahoma

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digitized polygons of a constant hydraulic conductivity value for the Central Oklahoma aquifer in central Oklahoma. This area encompasses...

  7. Digital data sets that describe aquifer characteristics of the Central Oklahoma aquifer in central Oklahoma

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digitized water-level elevation contours for the Central Oklahoma aquifer in central Oklahoma. This area encompasses all or part of...

  8. Nuclear Energy in Central Europe 98, Proceedings

    International Nuclear Information System (INIS)

    Regional Meeting for Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contain 63 articles from Slovenia, sorounding countries and countries of the Central and Eastern European Region. Topics are: Research Reactors, Nuclear Methods, Reactor Physics, Thermal Hydraulics, Structural Analysis, Probabilistic Safety Assessment, Severe Accidents, NPP Operation and Nuclear Waste disposal

  9. The Cartan Matrix of a Centralizer Algebra

    Indian Academy of Sciences (India)

    Umesh V Dubey; Amritanshu Prasad; Pooja Singla

    2012-02-01

    The centralizer algebra of a matrix consists of those matrices that commute with it. We investigate the basic representation-theoretic invariants of centralizer algebras, namely their radicals, projective indecomposable modules, injective indecomposable modules, simple modules and Cartan matrices. With the help of our Cartan matrix calculations we determine their global dimensions. Many of these algebras are of infinite global dimension.

  10. A SCALED CENTRAL PATH FOR LINEAR PROGRAMMING

    Institute of Scientific and Technical Information of China (English)

    Ya-xiang Yuan

    2001-01-01

    Interior point methods are very efficient methods for solving large scale linear programming problems. The central path plays a very important role in interior point methods. In this paper we propose a new central path, which scales the variables. Thus it has the advantage of forcing the path to have roughly the same distance from each active constraint boundary near the solution.

  11. Improved closeness centrality using arithmetic mean approach

    Science.gov (United States)

    Ruslan, Nuraimi; Sharif, Shamshuritawati

    2015-12-01

    In this paper, we improved the mathematical formulation of closeness centrality measure for weighted network. The proposed measure is used arithmetic mean approach and the performance is successfully better than the existing closeness centrality. This measure can be used as a measure of influential nodes.

  12. CENTRAL PONTINE MYELINOLYSIS: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Chethan Belgur

    2014-04-01

    Full Text Available Central Pontine Myelinolysis is a clinically heterogeneous condition with difficult clinical and radiological diagnosis. When the condition is found outside pons it is called extrapontine myelinolysis which is together termed as osmotic demyelination syndrome. We present a case of central pontine myelinolysis with characteristic MR imaging features

  13. Visualizing the Central Limit Theorem through Simulation

    Science.gov (United States)

    Ruggieri, Eric

    2016-01-01

    The Central Limit Theorem is one of the most important concepts taught in an introductory statistics course, however, it may be the least understood by students. Sure, students can plug numbers into a formula and solve problems, but conceptually, do they really understand what the Central Limit Theorem is saying? This paper describes a simulation…

  14. Guidance and Orientation Manual : Internal Diseases Ward 11 - Central Finland Central Hospital

    OpenAIRE

    Hirjaba, Marina

    2009-01-01

    The purpose of this Bachelor’s Thesis is to create an initiation manual for the foreign students, foreign visitors or anyone else interested about Internal Diseases ward 11, Central Finland Central Hospital. The aim of the guidance material is to help the foreign students, who are practicing on ward 11, to become acquainted with the Finnish Healthcare System, Central Finland Central Hospital and to offer orientation upon the nursing and organisation of Internal Diseases ward 11. It is taken i...

  15. Central station market development strategies for photovoltaics

    Science.gov (United States)

    1980-01-01

    Federal market development strategies designed to accelerate the market penetration of central station applications of photovoltaic energy system are analyzed. Since no specific goals were set for the commercialization of central station applications, strategic principles are explored which, when coupled with specific objectives for central stations, can produce a market development implementation plan. The study includes (1) background information on the National Photovoltaic Program, photovoltaic technology, and central stations; (2) a brief market assessment; (3) a discussion of the viewpoints of the electric utility industry with respect to solar energy; (4) a discussion of commercialization issues; and (5) strategy principles. It is recommended that a set of specific goals and objectives be defined for the photovoltaic central station program, and that these goals and objectives evolve into an implementation plan that identifies the appropriate federal role.

  16. Central station market development strategies for photovoltaics

    Science.gov (United States)

    1980-11-01

    Federal market development strategies designed to accelerate the market penetration of central station applications of photovoltaic energy system are analyzed. Since no specific goals were set for the commercialization of central station applications, strategic principles are explored which, when coupled with specific objectives for central stations, can produce a market development implementation plan. The study includes (1) background information on the National Photovoltaic Program, photovoltaic technology, and central stations; (2) a brief market assessment; (3) a discussion of the viewpoints of the electric utility industry with respect to solar energy; (4) a discussion of commercialization issues; and (5) strategy principles. It is recommended that a set of specific goals and objectives be defined for the photovoltaic central station program, and that these goals and objectives evolve into an implementation plan that identifies the appropriate federal role.

  17. Reduced central blood volume in cirrhosis

    DEFF Research Database (Denmark)

    Henriksen, Jens Henrik; Bendtsen, Flemming; Sørensen, T I;

    1989-01-01

    was inversely correlated to the systemic vascular resistance (r = -0.49, p less than 0.001), the latter being significantly reduced in the patient group. Patients with cirrhosis apparently are unable to maintain a normal central blood volume. This may be due to arteriolar vasodilation, portosystemic collateral......The pathogenesis of ascites formation in cirrhosis is uncertain. It is still under debate whether the effective blood volume is reduced (underfilling theory) or whether the intravascular compartment is expanded (overflow theory). This problem has not yet been solved because of insufficient tools...... for measuring the central blood volume. We have developed a method that enables us to determine directly the central blood volume, i.e., the blood volume in the heart cavities, lungs, and central arterial tree. In 60 patients with cirrhosis and 16 control subjects the central blood volume was assessed according...

  18. The central curve in linear programming

    CERN Document Server

    De Loera, Jesús A; Vinzant, Cynthia

    2010-01-01

    The central curve of a linear program is an algebraic curve specified by linear and quadratic constraints arising from complementary slackness. It is the union of the various central paths for minimizing or maximizing the cost function over any region in the associated hyperplane arrangement. We determine the degree, arithmetic genus and defining prime ideal of the central curve, thereby answering a question of Bayer and Lagarias. These invariants, along with the degree of the Gauss image of the curve, are expressed in terms of the matroid of the input matrix. Extending work of Dedieu, Malajovich and Shub, this yields an instance-specific bound on the total curvature of the central path, a quantity relevant for interior point methods. The global geometry of central curves is studied in detail.

  19. FROM CENTRAL ASIA TO GREAT CENTRAL ASIA: THE GOALS AND ADJUSTMENTS OF U.S. CENTRAL ASIAN STRATEGY

    OpenAIRE

    Tian, Robert

    2009-01-01

    To penetrate and maintain peaceful development of the Central Asian region is a consistent goal of the United States for its international interests. With the 9/11 event as the baseline, since 2001 America's awareness of the strategic importance of Central Asia and the latter's weight in U.S. global strategy has been greatly changed. According to Charles Manes, the 9/11 terrorist attack enabled the U.S. to "discover Central Asia. As a result of this discovery the United States effectively gai...

  20. Report of the Central Tracking Group

    International Nuclear Information System (INIS)

    Issues involved in building a realistic central tracking system for a general-purpose 4π detector for the SSC are addressed. Such a central tracking system must be capable of running at the full design luminosity of 1033 cm-2s-1. Momentum measurement was required in a general-purpose 4π detector. Limitations on charged particle tracking detectors at the SSC imposed by rates and radiation damage are reviewed. Cell occupancy is the dominant constraint, which led us to the conclusion that only small cells, either wires or straw tubes, are suitable for a central tracking system at the SSC. Mechanical problems involved in building a central tracking system of either wires or straw tubes were studied, and our conclusion was that it is possible to build such a large central tracking system. Of course, a great deal of research and development is required. We also considered central tracking systems made of scintillating fibers or silicon microstrips, but our conclusion was that neither is a realistic candidate given the current state of technology. We began to work on computer simulation of a realistic central tracking system. Events from interesting physics processes at the SSC will be complex and will be further complicated by hits from out-of-time bunch crossings and multiple interactions within the same bunch crossing. Detailed computer simulations are needed to demonstrate that the pattern recognition and tracking problems can be solved

  1. XNAT Central: Open sourcing imaging research data.

    Science.gov (United States)

    Herrick, Rick; Horton, William; Olsen, Timothy; McKay, Michael; Archie, Kevin A; Marcus, Daniel S

    2016-01-01

    XNAT Central is a publicly accessible medical imaging data repository based on the XNAT open-source imaging informatics platform. It hosts a wide variety of research imaging data sets. The primary motivation for creating XNAT Central was to provide a central repository to host and provide access to a wide variety of neuroimaging data. In this capacity, XNAT Central hosts a number of data sets from research labs and investigative efforts from around the world, including the OASIS Brains imaging studies, the NUSDAST study of schizophrenia, and more. Over time, XNAT Central has expanded to include imaging data from many different fields of research, including oncology, orthopedics, cardiology, and animal studies, but continues to emphasize neuroimaging data. Through the use of XNAT's DICOM metadata extraction capabilities, XNAT Central provides a searchable repository of imaging data that can be referenced by groups, labs, or individuals working in many different areas of research. The future development of XNAT Central will be geared towards greater ease of use as a reference library of heterogeneous neuroimaging data and associated synthetic data. It will also become a tool for making data available supporting published research and academic articles. PMID:26143202

  2. Central black hole masses of galaxies

    Institute of Scientific and Technical Information of China (English)

    樊军辉

    2003-01-01

    In this paper, the stellar velocity dispersions in the host galaxies are used to estimate the central black hole masses for a sample of elliptical galaxies. We find that the central black hole masses are in the range of 10(5.5-9.5) M(○). Based on the estimated masses in this paper and those by Woo & Urry (2002) and the measured host galaxy absolute magnitude,a relation, log(MBH/M(○)) = -(0.25 ± 4.3 × 10-3)MR + (2.98 4 0.208) is found for central black hole mass and the host galaxy magnitude. Some discussions are presented.

  3. Central versus institutional self-archiving

    OpenAIRE

    Harnad, Stevan

    2006-01-01

    NIH's, PLoS's, the Wellcome Trust's and now the UK MRC's unreflective support for PubMed Central (PMC), a Central Repository (CR), as the locus for direct self-archiving by authors is very unfortunate for Institutional Repositories (IRs), for self-archiving, and for Open Access (OA) progress in general. Alma Swan has published key papers on both OA self-archiving policy and institutional versus central self-archiving (IRs vs. CRs) analysing the reasons. (a) Institutional self-archiving and ce...

  4. Searchability of central nodes in networks

    CERN Document Server

    Klemm, Konstantin

    2013-01-01

    Social networks are discrete systems with a large amount of heterogeneity among nodes (individuals). Measures of centrality aim at a quantification of nodes' importance for structure and function. Here we ask to which extent the most central nodes can be found by purely local search. We find that many networks have close-to-optimal searchability under eigenvector centrality, outperforming searches for degree and betweenness. Searchability of the strongest spreaders in epidemic dynamics tends to be substantially larger for supercritical than for subcritical spreading.

  5. Performance contracting in central government in Denmark

    DEFF Research Database (Denmark)

    Kristiansen, Mads Bøge

    2015-01-01

    This paper looks into performance contracting in Danish central government. Management by Objectives and Results (MBOR) was adopted in central government in Denmark during the 1980s and early 1990s. In 1991, performance contracts between parent ministries and their agencies were introduced in...... observed across central government agencies, when the content of the performance contracts is compared. This makes it interesting to examine how variation in the content of the performance contracts across agencies can be explained? Based on a broad theoretical framework in which variation in...

  6. China and Central Asian Energy Geopolitics

    Directory of Open Access Journals (Sweden)

    Zafar Javed

    2014-04-01

    Full Text Available China is immediate neighbour of Central Asian States and has very long history of engagement with the region. A brief history of Chinese engagementis discussed in given paper. China is world largest economy and dependent of imported oil and gas form different part of world and this oiland gas supply is expensive and vulnerable because of various reasons, therefore China is focusing on Central Asia as this region has vast amountof hydrocarbons. Chinese policies and strategies to grab Central Asian oil and gas are also examined in given paper.

  7. Miniaturized Airborne Imaging Central Server System Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The innovation is a miniaturized airborne imaging central server system (MAICSS). MAICSS is designed as a high-performance computer-based electronic backend that...

  8. Miniaturized Airborne Imaging Central Server System Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The innovation is a miniaturized airborne imaging central server system (MAICSS). MAICSS is designed as a high-performance-computer-based electronic backend that...

  9. Central Gulf of Alaska Rockfish Permit Program

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The North Pacific Fishery Management Council adopted the Central Gulf of Alaska Rockfish Program (Rockfish Program) on June 14, 2010, to replace the expiring Pilot...

  10. Earthquakes in Central California, 1980-1984

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — There have been many earthquake occurrences in central California. This set of slides shows earthquake damage from the following events: Livermore, 1980, Coalinga,...

  11. Centrality measures for immunization of weighted networks

    Directory of Open Access Journals (Sweden)

    Mohammad Khansari

    2016-03-01

    Full Text Available Effective immunization of individual communities with minimal cost in vaccination has made great discussion surrounding the realm of complex networks. Meanwhile, proper realization of relationship among people in society and applying it to social networks brings about substantial improvements in immunization. Accordingly, weighted graph in which link weights represent the intensity and intimacy of relationships is an acceptable approach. In this work we employ weighted graphs and a wide variety of weighted centrality measures to distinguish important individuals in contagion of diseases. Furthermore, we propose new centrality measures for weighted networks. Our experimental results show that Radiality-Degree centrality is satisfying for weighted BA networks. Additionally, PageRank-Degree and Radiality-Degree centralities showmoreacceptable performance in targeted immunization of weighted networks.

  12. Legume Diversity Patterns in West Central Africa

    NARCIS (Netherlands)

    Estrella, de la M.; Mateo, M.A.; Wieringa, J.J.; Mackinder, B.; Munoz, J.

    2012-01-01

    Objectives - Species Distribution Models (SDMs) are used to produce predictions of potential Leguminosae diversity in West Central Africa. Those predictions are evaluated subsequently using expert opinion. The established methodology of combining all SDMs is refined to assess species diversity withi

  13. Early macroseismic maps in Central Europe

    Czech Academy of Sciences Publication Activity Database

    Kozák, Jan; Vaněk, Jiří

    2013-01-01

    Roč. 1, č. 2 (2013), s. 43-53. ISSN 2330-1740 Institutional support: RVO:67985530 Keywords : macroseismic maps * intensity scales * Central Europe * 19th century Subject RIV: DC - Siesmology, Volcanology, Earth Structure

  14. Alluvial Boundary of California's Central Valley

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital dataset defines the extent of the alluvial deposits in the Central Valley of California and encompasses the contiguous Sacramento, San Joaquin, and...

  15. Random walk centrality in interconnected multilayer networks

    Science.gov (United States)

    Solé-Ribalta, Albert; De Domenico, Manlio; Gómez, Sergio; Arenas, Alex

    2016-06-01

    Real-world complex systems exhibit multiple levels of relationships. In many cases they require to be modeled as interconnected multilayer networks, characterizing interactions of several types simultaneously. It is of crucial importance in many fields, from economics to biology and from urban planning to social sciences, to identify the most (or the less) influent nodes in a network using centrality measures. However, defining the centrality of actors in interconnected complex networks is not trivial. In this paper, we rely on the tensorial formalism recently proposed to characterize and investigate this kind of complex topologies, and extend two well known random walk centrality measures, the random walk betweenness and closeness centrality, to interconnected multilayer networks. For each of the measures we provide analytical expressions that completely agree with numerically results.

  16. Development of the ZEUS Central Tracking Detector

    International Nuclear Information System (INIS)

    The design concept and development of the ZEUS Central Tracking Detector is described. This is a cylindrical drift chamber designed for track reconstruction, electron identification and event triggering in a high crossing-rate, high magnetic field environment. (author)

  17. Ablated tektite from the central Indian Ocean

    Digital Repository Service at National Institute of Oceanography (India)

    Glass, B.P.; Chapman, D.R.; ShyamPrasad, M.

    ) australites found at Serpentine Lakes and Lake Wilson, Australia, and to some HMg microtektites found in deep-sea sediments from the central Indian Ocean. This discovery supports a previous conclusion that the Australasian tektite strewn field covers most...

  18. EXPLAINING TRAFFIC FLOW PATTERNS USING CENTRALITY MEASURES

    Directory of Open Access Journals (Sweden)

    Amila Jayasinghe

    2015-06-01

    Full Text Available This study examines the capability of centrality parameters of the road network to explain and predict traffic flow by types of vehicles. The case study was conducted in Colombo Metropolitan Area, Sri Lanka. Study used four centrality parameters i.e. connectivity, global integration, local integration and choice; and three analysis methods i.e. topological, metric and angular which introduced by space syntax analysis method to compute network centrality of the road network. Findings of this study stress that, (1 human beings perceive the space mostly from geometrical distance (topological and angular distance in comparison to metric distance. Further to this, it was found that angular distance is more powerful in global level whereas topological distance is more powerful in local level; (2 it is more appropriate to consider the multiple influences from multiple centrality parameters rather being confined to a single best parameter and influence of each parameter varies based on type of vehicles.

  19. Francis Crick, DNA, and the Central Dogma

    Science.gov (United States)

    Olby, Robert

    1970-01-01

    This essay describes how Francis Crick, ex-physicist, entered the field of biology and discovered the structure of DNA. Emphasis is upon the double helix, the sequence hypothesis, the central dogma, and the genetic code. (VW)

  20. The CMS central hadron calorimeter: Update

    International Nuclear Information System (INIS)

    The CMS central hadron calorimeter is a brass absorber/ scintillator sampling structure. We describe details of the mechanical and optical structure. We also discuss calibration techniques, and finally the anticipated construction schedule

  1. Random walk centrality in interconnected multilayer networks

    CERN Document Server

    Solé-Ribalta, Albert; Gómez, Sergio; Arenas, Alex

    2015-01-01

    Real-world complex systems exhibit multiple levels of relationships. In many cases they require to be modeled as interconnected multilayer networks, characterizing interactions of several types simultaneously. It is of crucial importance in many fields, from economics to biology and from urban planning to social sciences, to identify the most (or the less) influential nodes in a network using centrality measures. However, defining the centrality of actors in interconnected complex networks is not trivial. In this paper, we rely on the tensorial formalism recently proposed to characterize and investigate this kind of complex topologies, and extend two well known random walk centrality measures, the random walk betweenness and closeness centrality, to interconnected multilayer networks. For each of the measures we provide analytical expressions that completely agree with numerically results.

  2. NCPC Central Files Information System (CFIS)

    Data.gov (United States)

    National Capital Planning Commission — This dataset contains records from NCPC's Central Files Information System (CFIS), which is a comprehensive database of projects submitted to NCPC for design review...

  3. Central California 3 arc-second DEM

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 3-second Central California Elevation Grid provides bathymetric data in ASCII raster format of 3-second resolution in geographic coordinates. This grid is...

  4. Central Asian Snow Cover from Hydrometeorological Surveys

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Central Asian Snow Cover from Hydrometeorological Surveys data are based on observations made by personnel for three river basins: Amu Darya, Sir Darya, and...

  5. Central Station DHC Phase 1 feasibility

    Energy Technology Data Exchange (ETDEWEB)

    Henderson, H.L.

    1992-03-01

    This project assisted a private real estate developer in technically assessing the feasibility of integrating a central DHC system into a proposed 72 acre area mixed-use Planned Development (Central Station) just south of the Chicago Central Business District (Loop). The technical assessment concluded that a district heating and cooling system for Central Station will be feasible, provided that a major anchor load can be connected to the system. The system conceived for the site employs a modular approach that adjusts production capacity to actual load growth. The design concept includes gas-fired boilers for heating, gas turbine driven chillers for base loading, electric motor driven chillers for peaking, steam turbines for peak power and back pressure operation, and chilled water storage. Energy will be supplied to the users in the form of steam or low temperature hot water for heating, and low temperature chilled water for cooling.

  6. Veterans Affairs Central Cancer Registry (VACCR)

    Data.gov (United States)

    Department of Veterans Affairs — The Veterans Affairs Central Cancer Registry (VACCR) receives and stores information on cancer diagnosis and treatment constraints compiled and sent in by the local...

  7. Staging Childhood Central Nervous System Embryonal Tumors

    Science.gov (United States)

    ... children. See the PDQ summary on Adult Central Nervous System Tumors Treatment for more information on the treatment of adults. There are different types of CNS embryonal tumors. Enlarge Anatomy of the inside of the brain, showing the ...

  8. 1999 Yellow River Aerial Photos, Central Wisconsin

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The 25-mile stretch of the Yellow River adjacent to the Necedah National Wildlife Refuge in Central Wisconsin provides valuable habitat to numerous species of...

  9. Initial TMX central-cell ICRH experiments

    International Nuclear Information System (INIS)

    Four topics are discussed in this report: the feasibility of applying ion cyclotron resonance heating (ICRH) in the TMX central cell, some applications of heating, the results of preliminary experiments, and plans for further ICRH experiments

  10. Asset prices, financial fragility, and central banking

    OpenAIRE

    Tymoigne, Éric

    2006-01-01

    The paper reviews the current literature on the subject in both the New Consensus and Post Keynesian frameworks. It shows that both approaches give to central banks a wrong goal (inflation, distribution, curbing speculation, and so on) and a wrong instrument (interest rate rule). The paper claims that central banks should focus their attention on maintaining financial stability and leave other problems to public institutions better suited for this task. In doing so they should develop new too...

  11. Central management of experimental data network

    OpenAIRE

    Meixner, Jaroslav

    2012-01-01

    The aim of this diploma thesis is design and implementation of experimantal data network central management in convergent network technology laboratory. This diploma thesis is devided into several chapters. Management network fundamentals are described in introduction. Actually used experimental network is analyzed in the second chapter. Design and implemantion of web modular information system are presented in third part. Solution of central management network system is summarised at the end...

  12. Role of Central Bank in Islamic Finance

    OpenAIRE

    Shaikh, Salman

    2009-01-01

    The rapid growth in Islamic finance industry urges us to not only look for alternatives in the Islamic commercial banking, but also focus on the regulator and its role and functions to enable it to work in conformity with Islamic principles. This study reviews limited, but precious academic literature on central banking and monetary management in an environment where Islamic finance is in vogue. Refinance ratio and Qard-e-Hasan ratio and Mudarabah between central bank and Islamic commercial b...

  13. Central diffractive resonance production at the LHC

    Science.gov (United States)

    Fiore, Roberto; Jenkovszky, Laszlo; Schicker, Rainer

    2016-07-01

    Central production of resonances resulting from the scattering of Pomerons in the central rapidity region of proton-proton scattering is studied. Estimates for relevant cross sections are presented. L.J. gratefully acknowledges an EMMI visiting Professorship at the University of Heidelberg for completion of this work. He is grateful to the organizers of this meeting for their hospitality and support. His work was supported also by DOMUS, Hungarian Academy of Sciences

  14. Focal lesions in the central nervous system

    International Nuclear Information System (INIS)

    This report reviews the animal and human studies currently in progress at LBL with heavy-ion beams to induce focal lesions in the central nervous system, and discusses the potential future prospects of fundamental and applied brain research with heavy-ion beams. Methods are being developed for producing discrete focal lesions in the central nervous system using the Bragg ionization peak to investigate nerve pathways and neuroendocrine responses, and for treating pathological disorders of the brain

  15. Hitherto unreported Agaricus species of Central India

    OpenAIRE

    MAHENDRA KUMAR RAI; ALKA KARWA

    2010-01-01

    Karwa A, Rai MK. 2010. Hitherto unreported Agaricus species of Central India. Nusantara Bioscience 2: 141-145. Melghat forest region from Central India was surveyed for occurrence of medicinal and culinary mushrooms during the years 2005-2008. Out of total 153 species, ten species of Agaricus were recorded from different localities. Of these, seven species namely Agaricus bitorquis, A. subrufescens, A. augustus, A. placomyces, A. essettei, A. basioanolosus and Agaricus sp. nov (a new species)...

  16. "Lessons from an Unconventional Central Banker"

    OpenAIRE

    Thorvald Grung Moe

    2013-01-01

    The global financial crisis has generated renewed interest in the 1951 Treasury - Federal Reserve Accord and its lessons for central bank independence. A broader interpretation of the Accord and of Marriner S. Eccles's role at the Federal Reserve should teach central bankers that independence can be crucial for fighting inflation, but also encourage them to be more supportive of government efforts to fight deflation and mass unemployment.

  17. Central Serous Chorioretinopathy after Solar Eclipse Viewing

    OpenAIRE

    Allie Lee; Timothy Lai

    2010-01-01

    Purpose: To report a case of central serous chorioretinopathy after solar eclipse viewing. Case Report: A middle-age man developed a sudden-onset unilateral scotoma after viewing a partial solar eclipse in Hong Kong. Fundus examination, fluorescein angiography, and optical coherence tomography showed features compatible with central serous chorioretinopathy. The patient was managed conservatively and reevaluated periodically. Serial optical coherence tomographic evaluations demonstrated a...

  18. Central Institute for Nuclear Research (1956 - 1979)

    International Nuclear Information System (INIS)

    The Central Institute for Nuclear Research (ZfK) of the Academy of Sciences of the GDR is presented. This first overall survey covers the development of the ZfK since 1956, the main research activities and results, a description of the departments responsible for the complex implementation of nuclear research, the social services for staff and the activities of different organizations in the largest central institute of the Academy of Sciences of the GDR. (author)

  19. Transient central diabetes insipidus following ischemic stroke

    Directory of Open Access Journals (Sweden)

    Muthukrishnan Jayaraman

    2013-01-01

    Full Text Available Central Diabetes Insipidus (CDI following ischemic infarction of the brain has been described as a rare presentation. Posterior pituitary ischemia has also been postulated as a possible cause of idiopathic CDI. We encountered a young male with bilateral extensive ischemic infarction sustained at high altitude, who had transient polyuria due to central diabetes insipidus, requiring desmopressin therapy. DI completely resolved during the course of his neurological recovery.

  20. Transient central diabetes insipidus following ischemic stroke

    OpenAIRE

    Muthukrishnan Jayaraman; Sandeep Kumar; Ahmad, F. M. H.

    2013-01-01

    Central Diabetes Insipidus (CDI) following ischemic infarction of the brain has been described as a rare presentation. Posterior pituitary ischemia has also been postulated as a possible cause of idiopathic CDI. We encountered a young male with bilateral extensive ischemic infarction sustained at high altitude, who had transient polyuria due to central diabetes insipidus, requiring desmopressin therapy. DI completely resolved during the course of his neurological recovery.

  1. Transient central diabetes insipidus following ischemic stroke.

    Science.gov (United States)

    Jayaraman, Muthukrishnan; Kumar, Sandeep; Ahmad, F M H

    2013-10-01

    Central Diabetes Insipidus (CDI) following ischemic infarction of the brain has been described as a rare presentation. Posterior pituitary ischemia has also been postulated as a possible cause of idiopathic CDI. We encountered a young male with bilateral extensive ischemic infarction sustained at high altitude, who had transient polyuria due to central diabetes insipidus, requiring desmopressin therapy. DI completely resolved during the course of his neurological recovery. PMID:24251140

  2. Central regions of keloids are severely ischaemic.

    Science.gov (United States)

    Touchi, Ryoma; Ueda, Koichi; Kurokawa, Norifumi; Tsuji, Motomu

    2016-02-01

    We classified scars as keloids, hypertrophic scars and mature scars, and then examined the scars for differences in central and marginal vascularization. We found significant differences in localized hypoxia-induced factor-1α (HIF-1α) expression and vascular density in keloids, but no localized differences in hypertrophic or mature scars. The central areas of keloids exhibited higher HIF-1α expression and lower vascular density than marginal areas, suggesting that the former are severely ischaemic. PMID:26794626

  3. Central Asia's comparative advantage in international trade

    OpenAIRE

    Lücke, Matthias; Rothert, Jacek

    2006-01-01

    This paper outlines a strategy for identifying the pattern of Central Asia’s comparative advantage in international trade, based on factor prices and transport costs, historical production patterns, and recent trends in the geographical and product composition of Central Asian trade. The paper focuses on Kazakhstan, the Kyrgyz Republic, Tajikistan, and Uzbekistan, along with Azerbaijan and Mongolia. A country’s comparative advantage cannot be determined at the level of individual industries o...

  4. Association and Centrality in Criminal Networks

    DEFF Research Database (Denmark)

    Petersen, Rasmus Rosenqvist

    analyze the structural richness required to model and investigate criminal network entities and their associations. We demonstrate a need to rethink entity associations with one specific case (inspired by \\textit{The Wire}, a tv series about organized crime in Baltimore, United States) and corroborated by...... three of these associations and extend and test two centrality measures using CrimeFighter Investigator, a novel tool for criminal network investigation. Our findings show that the extended centrality measures offer new insights into criminal networks....

  5. Central Exams Improve Educational Performance: International Evidence

    OpenAIRE

    Wößmann, Ludger

    2002-01-01

    International comparative studies of student performance have initiated political discussions in countries all over the world on how to improve the educational achievement of students. The empirical evidence suggests that central exams help to achieve higher student performance. Central exams direct the incentives of all educational actors towards furthering students’ knowledge. By providing the education system with performance information they improve the monitoring of students, teachers, s...

  6. A handbook for solar central receiver design

    Energy Technology Data Exchange (ETDEWEB)

    Falcone, P.K.

    1986-12-01

    This Handbook describes central receiver technology for solar thermal power plants. It contains a description and assessment of the major components in a central receiver system configured for utility scale production of electricity using Rankine-cycle steam turbines. It also describes procedures to size and optimize a plant and discussed examples from recent system analyses. Information concerning site selection criteria, cost estimation, construction, and operation and maintenance is also included, which should enable readers to perform design analyses for specific applications.

  7. Entrapment of guidewire during central venous catheterization

    Directory of Open Access Journals (Sweden)

    Tarun S.

    2016-07-01

    Full Text Available Central venous catheterization (CVC is common in the setting of ICU for various reasons like monitoring of CVP, fluid administration and vasopressor or drug infusions. Guidewires are routinely used in the Seldinger technique during central venous catheter placement CVC placement is not innocuous as numerous complications may occur, with varying frequency and severity. [Int J Res Med Sci 2016; 4(7.000: 3080-3081

  8. Peritoneal dissemination from central neurocytoma: case report

    OpenAIRE

    Coelho Neto Maurício; Ramina Ricardo; Meneses Murilo Sousa de; Arruda Walter Oleschko; Milano Jerônimo Buzetti

    2003-01-01

    OBJECTIVE: central neurocytoma is a low grade tumor of neuroglial origin and a relatively new histological entity. Only a few cases have been reported and its biological behavior is still uncertain. Some cases have shown an aggressive behavior (local recurrence, malignant dedifferentiation or CSF dissemination) and challenged the initial view of its relative benignity. A case of central neurocytoma with peritoneal dissemination is presented. CASE: a six years-old boy with recurrent neurocytom...

  9. Central structure preservation of the reversal sign

    International Nuclear Information System (INIS)

    We report serial changes of central structure preservation of the reversal sign in a case of child abuse. The serial CT images show that the relatively spared attenuation at the basal ganglia, thalami, and posterior fossa develops before the occurrence of transtentorial herniation. This finding makes the theory that central preservation of the reversal sign is due to pressure relief after transtentorial herniation less convincible. (orig.)

  10. Central structure preservation of the reversal sign

    Energy Technology Data Exchange (ETDEWEB)

    Chen, C.J. [Dept. of Diagnostic Radiology, Chang Gung Memorial Hospital, Taipei (Taiwan)

    1999-12-01

    We report serial changes of central structure preservation of the reversal sign in a case of child abuse. The serial CT images show that the relatively spared attenuation at the basal ganglia, thalami, and posterior fossa develops before the occurrence of transtentorial herniation. This finding makes the theory that central preservation of the reversal sign is due to pressure relief after transtentorial herniation less convincible. (orig.)

  11. Yes, we need a central bank

    OpenAIRE

    Hanif, Muhammad Nadim

    2002-01-01

    The financial system of a country comprises entities engaged in transactions involving financial instruments in money, capital, and foreign exchange markets. This sector has strong linkages with other sectors of the economy like external, fiscal and real sectors. The apex financial institution in every country is its Central Bank and the State Bank of Pakistan functions as our Central Bank. Section 9A. 1. of the State Bank of Pakistan Act 1956 shoulders the function of securing the soundness ...

  12. Making Central Banks Serve The Real Economy

    Directory of Open Access Journals (Sweden)

    Suleika Reiners

    2013-10-01

    Full Text Available The challenge is to redirect central bank money into the real economy and to the needs of society. If new money is issued to expand the productive capacity, there is no reason for inflation. Long-term financing could become available at an affordable price. Central bank money must not replace a sound tax system and the distribution of income and wealth, but complement them. The remaining task, apart from the financing of real needs, is the prevention of speculative asset price inflation. For this, central banks and regulators should install debt brakes for the financial sector. Furthermore, independent monetary policy calls for capital account management. It enables national central banks to find space for the conduct of their own policies in an interdependent global economy. Coordination between central banks and governments might increase as policies combine monetary, fiscal and regulatory facets. The future role of central banks should particularly lie in their insights regarding capital flows and leverage cycles and in their ability to create and withdraw money, depend­ing on economic conditions.

  13. Community centrality and social science research.

    Science.gov (United States)

    Allman, Dan

    2015-12-01

    Community centrality is a growing requirement of social science. The field's research practices are increasingly expected to conform to prescribed relationships with the people studied. Expectations about community centrality influence scholarly activities. These expectations can pressure social scientists to adhere to models of community involvement that are immediate and that include community-based co-investigators, advisory boards, and liaisons. In this context, disregarding community centrality can be interpreted as failure. This paper considers evolving norms about the centrality of community in social science. It problematises community inclusion and discusses concerns about the impact of community centrality on incremental theory development, academic integrity, freedom of speech, and the value of liberal versus communitarian knowledge. Through the application of a constructivist approach, this paper argues that social science in which community is omitted or on the periphery is not failed science, because not all social science requires a community base to make a genuine and valuable contribution. The utility of community centrality is not necessarily universal across all social science pursuits. The practices of knowing within social science disciplines may be difficult to transfer to a community. These practices of knowing require degrees of specialisation and interest that not all communities may want or have. PMID:26440071

  14. Central alarm system replacement in NPP Krsko

    International Nuclear Information System (INIS)

    Current NPP Krsko central alarm system consists of three main segments. Main Control Board alarm system (BETA 1000), Ventilation Control Board alarm system (BETA 1000) and Electrical Control Board alarm system (BETA 1100). All sections are equipped with specific BetaTone audible alarms and silence, acknowledge as well as test push buttons. The main reason for central alarm system replacement is system obsolescence and problems with maintenance, due to lack of spare parts. Other issue is lack of system redundancy, which could lead to loss of several Alarm Light Boxes in the event of particular power supply failure. Current central alarm system does not provide means of alarm optimization, grouping or prioritization. There are three main options for central alarm system replacement: Conventional annunciator system, hybrid annunciator system and advanced alarm system. Advanced alarm system implementation requires Main Control Board upgrade, integration of process instrumentation and plant process computer as well as long time for replacement. NPP Krsko has decided to implement hybrid alarm system with patchwork approach. The new central alarm system will be stand alone, digital, with advanced filtering and alarm grouping options. Sequence of event recorder will be linked with plant process computer and time synchronized with redundant GPS signal. Advanced functions such as link to plant procedures will be implemented with plant process computer upgrade in outage 2006. Central alarm system replacement is due in outage 2004.(author)

  15. Health challenges in Kazakhstan and Central Asia.

    Science.gov (United States)

    Adambekov, Shalkar; Kaiyrlykyzy, Aiym; Igissinov, Nurbek; Linkov, Faina

    2016-01-01

    The Central Asian region, which encompasses Kazakhstan, Uzbekistan, Tajikistan, Turkmenistan and Kyrgyzstan, is an interesting geographic region with a rich history dating back to the Silk Road, Mongol conquests and expansion of the Russian Empire. However, from a public health viewpoint, the Central Asian region is under-investigated, and many public health challenges exist, as countries of Central Asia inherited the centralised medical systems practiced in the Soviet Union, and are currently undergoing rapid transitions. A large number of low and middle-income countries around the world, including countries of Central Asia, face a double burden of chronic and infectious disease. This essay focuses on the exploration of the most important public health challenges in the Central Asian region, including limited scientific productivity, the double burden of chronic and infectious disease, the need for healthcare reform and the reduction in care variation. Central Asia has a large number of medical schools, medical centres, and emerging research institutes that can be used to foster a change in medical and public health practice in the region. PMID:26254293

  16. Determinants of Central Adiposity among Iranian Population

    Directory of Open Access Journals (Sweden)

    Leila Azadbakht

    2013-03-01

    Full Text Available Background: Central obesity is one of the major public health problems. Recent studies have indicated that body fat distribution would be important in general health. Materials and Methods: The present study is a review of several studies which discuss the contributing factors of abdominal obesity, particulary in Iran. This study reviews 34 cross-sectional and interventional studies, which have been comducted during 1995-2012 and issued in English language. PubMed search engine and the related keywords were used to search the papers.Results: Breakfast skipping and also the sleep duration as well as the quality of diet are also associated with central adiposity. Dietary diversity score among Iranians can be related to abdominal adiposity. Fastfood consumption can increase the risk of central adiposity among young Iranian population. Red meat intake and food source of trans fat can increase the risk of central adiposity. Low quality diet with low amount of nutrients can increase the risk of central adiposity. Conclusion: Some behaviours such as sleep duration and eating breakfast can be associated with central adiposity among Iranians. Diet quality and dietary diversity score is also associated with this problem among Iranians.

  17. Central Banker Contracts, Incomplete Information, and Monetary Policy Surprises: In Search of a Selfish Central Banker?

    OpenAIRE

    Georgios E. Chortareas; Miller, Stephen M.

    2002-01-01

    Approaching monetary policy as a principal agent problem provides a useful framework for interpreting alternative delegation schemes. In this paper, we consider the effectiveness of central banker incentive schemes when the principal delegates monetary policy through contracts but remains uncertain about the central banker's responsiveness to such schemes. We adopt a simple principal-agent model and assume that the central banker's trade-off between social welfare and the incentive scheme is ...

  18. Market Information and Signaling in Central Bank Operations, or, How Often Should a Central Bank Intervene?

    OpenAIRE

    International Monetary Fund

    1997-01-01

    A central bank must decide on the frequency with which it will conduct open market operations and the variability in short-term money market that it will allow. The paper shows how the optimal operating procedure balances the value of attaining an immediate target and broadcasting the central bank's intentions against the informational advantages to the central bank of allowing the free play of market forces to reveal more of the information available to market participants.

  19. 21 CFR 1305.24 - Central processing of orders.

    Science.gov (United States)

    2010-04-01

    ... order with all linked records on the central computer system. (b) A company that has central processing... or more registered locations and maintains a central processing computer system in which orders are... the company owns and operates....

  20. Central depression of nuclear charge density distribution

    International Nuclear Information System (INIS)

    The center-depressed nuclear charge distributions are investigated with the parametrized distribution and the relativistic mean-field theory, and their corresponding charge form factors are worked out with the phase shift analysis method. The central depression of nuclear charge distribution of 46Ar and 44S is supported by the relativistic mean-field calculation. According to the calculation, the valence protons in 46Ar and 44S prefer to occupy the 1d3/2 state rather than the 2s1/2 state, which is different from that in the less neutron-rich argon and sulfur isotopes. As a result, the central proton densities of 46Ar and 44S are highly depressed, and so are their central charge densities. The charge form factors of some argon and sulfur isotopes are presented, and the minima of the charge form factors shift upward and inward when the central nuclear charge distributions are more depressed. Besides, the effect of the central depression on the charge form factors is studied with a parametrized distribution, when the root-mean-square charge radii remain constant.

  1. Generation of central exclusive final states

    CERN Document Server

    Lönnblad, Leif

    2016-01-01

    We present a scheme for the generation of central exclusive final states in the Pythia 8 program. The implementation allows for the investigation of higher order corrections to such exclusive processes as approximated by the initial-state parton shower in Pythia 8. To achieve this, the spin and colour decomposition of the initial-state shower has been worked out, in order to determine the probability that a partonic state generated from an inclusive sub-process followed by a series of initial-state parton splittings can be considered as an approximation of an exclusive colour- and spin-singlet process. We use our implementation to investigate effects of parton showers on some examples of central exclusive processes, and find sizeable effects on di-jet production, while the effects on e.g. central exclusive Higgs production are minor.

  2. Central functions of the orexinergic system

    Institute of Scientific and Technical Information of China (English)

    Xiao-Yang Zhang; Lei Yu; Qian-Xing Zhuang; Jing-Ning Zhu; Jian-Jun Wang

    2013-01-01

    The neuropeptide orexin is synthesized by neurons exclusively located in the hypothalamus.However,these neurons send axons over virtually the entire brain and spinal cord and therefore constitute a unique central orexinergic system.It is well known that central orexin plays a crucial role in the regulation of various basic non-somatic and somatic physiological functions,including feeding,energy homeostasis,the sleep/wake cycle,reward,addiction,and neuroendocrine,as well as motor control.Moreover,the absence of orexin results in narcolepsy-cataplexy,a simultaneous somatic and non-somatic dysfunction.In this review,we summarize these central functions of the orexinergic system and associated diseases,and suggest that this system may hold a key position in somatic-non-somatic integration.

  3. The Fermilab Central Computing Facility architectural model

    International Nuclear Information System (INIS)

    The goal of the current Central Computing Upgrade at Fermilab is to create a computing environment that maximizes total productivity, particularly for high energy physics analysis. The Computing Department and the Next Computer Acquisition Committee decided upon a model which includes five components: an interactive front end, a Large-Scale Scientific Computer (LSSC, a mainframe computing engine), a microprocessor farm system, a file server, and workstations. With the exception of the file server, all segments of this model are currently in production: a VAX/VMS Cluster interactive front end, an Amdahl VM computing engine, ACP farms, and (primarily) VMS workstations. This presentation will discuss the implementation of the Fermilab Central Computing Facility Architectural Model. Implications for Code Management in such a heterogeneous environment, including issues such as modularity and centrality, will be considered. Special emphasis will be placed on connectivity and communications between the front-end, LSSC, and workstations, as practiced at Fermilab. 2 figs

  4. Correcting intermittent central suppression improves binocular marksmanship.

    Science.gov (United States)

    Hussey, Eric S

    2007-04-01

    Intermittent central suppression (ICS) is a defect in normal binocular (two-eyed) vision that causes confusion in visual detail. ICS is a repetitive intermittent loss of visual sensation in the central area of vision. As the central vision of either eye "turns on and off", aiming errors in sight can occur that must be corrected when both eyes are seeing again. Any aiming errors in sight might be expected to interfere with marksmanship during two-eyed seeing. We compared monocular (one-eyed, patched) and binocular (two-eyed) marksmanship with pistol shooting with an Army ROTC cadet before and after successful therapy for diagnosed ICS. Pretreatment, monocular marksmanship was significantly better than binocular marksmanship, suggesting defective binocularity reduced accuracy. After treatment for ICS, binocular and monocular marksmanship were essentially the same. Results confirmed predictions that with increased visual stability from correcting the suppression, binocular and monocular marksmanship accuracies should merge. PMID:17484315

  5. Estimation for large non-centrality parameters

    Science.gov (United States)

    Inácio, Sónia; Mexia, João; Fonseca, Miguel; Carvalho, Francisco

    2016-06-01

    We introduce the concept of estimability for models for which accurate estimators can be obtained for the respective parameters. The study was conducted for model with almost scalar matrix using the study of estimability after validation of these models. In the validation of these models we use F statistics with non centrality parameter τ =‖λ/‖2 σ2 when this parameter is sufficiently large we obtain good estimators for λ and α so there is estimability. Thus, we are interested in obtaining a lower bound for the non-centrality parameter. In this context we use for the statistical inference inducing pivot variables, see Ferreira et al. 2013, and asymptotic linearity, introduced by Mexia & Oliveira 2011, to derive confidence intervals for large non-centrality parameters (see Inácio et al. 2015). These results enable us to measure relevance of effects and interactions in multifactors models when we get highly statistically significant the values of F tests statistics.

  6. Retail Market Structure Development in Central Europe

    Directory of Open Access Journals (Sweden)

    Martin Machek

    2012-12-01

    Full Text Available This article is analyzing the trends and development in the retailing sector in Central Europe, namely in the Czech Republic, Hungary, Poland and Slovakia. These markets serve about 63 million inhabitants. The retail industry in Central Europe has changed dramatically in the last two decades, and has become a model for successful transformation of emerging markets. The retail market is highly concentrated and dominated by Western European retail chains. International retail chains are using all formats of modern distribution. This article is focusing on the development of hypermarkets, supermarkets and discount stores. Due to the international retail chains, Central European countries benefit from a dense network of modern shopping places; the intense competition of highly productive retailers contributes to the lower level of inflation rate because of the so-called Wal-Mart Effect. The constant pressure on prices influences the marketing strategies of both retailers and suppliers.

  7. District Central Office Leadership as Teaching: How Central Office Administrators Support Principals' Development as Instructional Leaders

    Science.gov (United States)

    Honig, Meredith I.

    2012-01-01

    Purpose: Research on educational leadership underscores the importance of principals operating as instructional leaders and intensive job-embedded supports for such work; this research also identifies central office staff as key support providers. However, it teaches little about what central office staff do when they provide such support and how…

  8. 75 FR 14436 - Ameren Corporation, Illinois Power Company, Central Illinois Light Company, Central Illinois...

    Science.gov (United States)

    2010-03-25

    ... Energy Regulatory Commission Ameren Corporation, Illinois Power Company, Central Illinois Light Company, Central Illinois Public Service Company, Ameren Energy Resources Company, LLC, AmerenEnergy Resources Generating Company; Notice of Filing March 18, 2010. Take notice that on March 15, 2010, Ameren...

  9. The Crisis And Central Bank Reaction

    Directory of Open Access Journals (Sweden)

    Silviu CERNA

    2009-05-01

    Full Text Available The world economy is in the face of the strongest crisis of the last seventy years. This crisis is still ongoing, but authorities in many countries have already taken a series of measures to mitigate the effects. In this fight, the central banks are the first line. It is still too early to draw any lessons from the events taking place, but a reflection "sine ira et studio" over this experience is already possible. This paper aims to analyze this experience through the policies implemented by central banks to cope with the crisis.

  10. Central helium density measurements in PLT

    International Nuclear Information System (INIS)

    The central helium density in PLT has been deduced from measurements of the ratio of d-3He to d-d fusion reactions during deuterium neutral beam injection. The inward transport time for 3He puffed at the edge plasma was 10 → 30 msec. The decay time of the central 3He density increased with electron density, varying from 0.3 sec to greater than 1.0 sec over the density range of (1 → 5) x 1013 cm-3

  11. Progress in ATLAS central solenoid magnet

    CERN Document Server

    Yamamoto, A; Makida, Y; Tanaka, K; Haruyama, T; Yamaoka, H; Kondo, T; Mizumaki, S; Mine, S; Wada, K; Meguro, S; Sotoki, T; Kikuchi, K; ten Kate, H H J

    2000-01-01

    The ATLAS central solenoid magnet is being developed to provide a magnetic field of 2 Tesla in the central tracking volume of the ATLAS detector under construction at the CERN/LHC project. The solenoid coil design features high-strength aluminum stabilized superconductor to make the coil thinnest while maintaining its stability and the pure-aluminum strip technique for quench protection and safety. The solenoid coil is installed in a common cryostat with the LAr calorimeter in order to minimize the cryostat wall. A transparency of 0.66 radiation length is achieved with these integrated efforts. The progress in the solenoid coil fabrication is reported. (8 refs).

  12. MRI of central nervous system anomalies

    International Nuclear Information System (INIS)

    MRI was very useful in the evaluation of congenital anomalies of central nervous system as well as other nervous system disease with three-dimensional spatial resolution. We had experienced MRI of central nervous system anomalies, demonstrated characterisitic findings in each anomaly. MRI is useful to observe the coronal, horizontal and sagittal images of the brain and spinal cord in order to discuss the etiological mechanisms of spinal dysraphysm and its associated anomalies. In case of spina bifida cystica MRI was available to decide operative indication for radical operation and tetherd cord developed from postoperative scar or accompanied intraspinal lesions. (author)

  13. MRI of central nervous system anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Izawa, M.; Oikawa, A.; Matoba, A.

    1987-05-01

    MRI was very useful in the evaluation of congenital anomalies of central nervous system as well as other nervous system disease with three-dimensional spatial resolution. We had experienced MRI of central nervous system anomalies, demonstrated characterisitic findings in each anomaly. MRI is useful to observe the coronal, horizontal and sagittal images of the brain and spinal cord in order to discuss the etiological mechanisms of spinal dysraphysm and its associated anomalies. In case of spina bifida cystica MRI was available to decide operative indication for radical operation and tetherd cord developed from postoperative scar or accompanied intraspinal lesions.

  14. Metabolic syndrome and central retinal artery occlusion

    OpenAIRE

    Kosanović-Jaković Natalija; Petrović Lidija; Risimić Dijana; Milenković Svetislav; Matić Danica

    2005-01-01

    Background. The accumulation of risk factors for central retinal artery occlusion can be seen in a single person and might be explained by the metabolic syndrome. Case report. We presented the case of a 52-year-old man with no light perception in his right eye. The visual loss was monocular and painless, fundoscopy showed central retinal artery occlusion and the laboratory investigation showed the raised erythrocyte sedimentation rate of 105 mm/h and the raised C-reactive protein of 22 mg/l. ...

  15. Probabilistic seismic hazard assessment for Central Asia

    OpenAIRE

    Shahid Ullah; Dino Bindi; Marco Pilz; Laurentiu Danciu; Graeme Weatherill; Elisa Zuccolo; Anatoly Ischuk; Natalya N. Mikhailova; Kanat Abdrakhmatov; Stefano Parolai

    2015-01-01

    Central Asia is one of the seismically most active regions in the world. Its complex seismicity due to the collision of the Eurasian and Indian plates has resulted in some of the world’s largest intra-plate events over history. The region is dominated by reverse faulting over strike slip and normal faulting events. The GSHAP project (1999), aiming at a hazard assessment on a global scale, indicated that the region of Central Asia is characterized by peak ground accelerations for 10% probabili...

  16. Solitary median maxillary central incisor (SMMCI) syndrome

    OpenAIRE

    Hall Roger K

    2006-01-01

    Abstract Solitary median maxillary central incisor syndrome (SMMCI) is a complex disorder consisting of multiple, mainly midline defects of development resulting from unknown factor(s) operating in utero about the 35th–38th day(s) from conception. It is estimated to occur in 1:50,000 live births. Aetiology is uncertain. Missense mutation in the SHH gene (I111F) at 7q36 may be associated with SMMCI. The SMMCI tooth differs from the normal central incisor, in that the crown form is symmetric; i...

  17. Centralized rehabilitation after servere traumatic brain injury

    DEFF Research Database (Denmark)

    Engberg, Aase Worså; Liebach, Annette; Nordenbo, Annette Mosbæk

    2006-01-01

    OBJECTIVES: To present results from the first 3 years of centralized subacute rehabilitation after very severe traumatic brain injury (TBI), and to compare results of centralized versus decentralized rehabilitation. MATERIAL AND METHODS: Prospectively, the most severely injured group of adults from...... an uptake area of 2.4 million in Denmark were included at admission to a regional brain injury unit (BIU), on average 19 days after injury. Patients in the retrospective study used for comparison were randomly chosen from the national hospital register. RESULTS AND CONCLUSIONS: Out of 117 patients in...

  18. Church Orientations in Central and Eastern Europe

    Science.gov (United States)

    Laužikas, Rimvydas

    The objective of this case study is to discuss church orientation in Central and Eastern Europe. Due to its geographical situation, this region is a specific part of European cultural space: it is remote from the main cultural centers, it was the last to adopt Christianity, and it experienced intensive interactions with Byzantine culture. Therefore, we can assess church orientation in Central and Eastern Europe as a tradition affected by multicultural interactions and in which there is an interlacement of Catholicism from Western Europe, Byzantinism, local pagan faiths and, in part, the ideas of conception of geographical space of the Jews, Karaites, and Muslims.

  19. Simulating central forces in the classroom

    CERN Document Server

    Aguirregabiria, Juan M

    2015-01-01

    We describe the easy to customize and extend open source Java program Central force workbench that can be used in the classroom to simulate the motion of a particle (or a two-body system) under central forces. It may be useful to illustrate problems in which the analytical solution is not available as well as to help students to grasp a more intuitive understanding of the main features of this kind of problem and to realize the exceptional nature of the particular case of Newtonian (and harmonic) forces. We also include some suggestions on how to use the program as a pedagogical tool.

  20. Proceedings of the Women`s Technical and Professional Symposium, San Ramon, CA, October 3-4, 1996

    Energy Technology Data Exchange (ETDEWEB)

    Walling, R.; Norton, M. [eds.

    1996-08-01

    This year`s symposium showcases women`s contributions to science and technology, provide opportunities to learn new skills, discuss barriers that restrict women`s contributions to science and technology, and target actions for change. This 2-day event features presentations from women with a broad range of experiences, and also panel discussions, workshops, seminars, professional development workshops, and an opportunity for networking.

  1. Ühinev Euroopa tähistab sümboolset sünnipäeva / Ramon Loik

    Index Scriptorium Estoniae

    Loik, Ramon

    2006-01-01

    1951. a. allkirjastati Pariisis Euroopa Söe- ja Teraseühenduse asutamisleping, mille kuus osapoolt - Prantsusmaa, Saksamaa Liitvabariik, Belgia, Holland, Luksemburg ja Itaalia asusid koos turge ühendama ning tootmist laiendama

  2. Central Endoscopy Reading in Inflammatory Bowel Diseases.

    Science.gov (United States)

    Panés, Julián; Feagan, Brian G; Hussain, Fez; Levesque, Barrett G; Travis, Simon P

    2016-09-01

    Endoscopic assessment of the presence and severity of endoscopic lesions has become an essential part of clinical trials in ulcerative colitis and Crohn's disease, for both patient eligibility and outcome measures. Variability in lesion interpretation between and within observers and the potential bias of local investigators in patient assessment have long been recognized. This variability can be reduced, although not completely removed, by independent evaluation of the examinations by experienced off-site (central) readers, properly trained in regard to lesion definition and identification, that should be removed from direct patient contact and blinded to any other clinical or study data. Adding endoscopic demonstration of active disease to eligibility criteria has the potential to reduce placebo response rates, whereas in outcome assessment it has the potential to provide a more precise estimation of the treatment effect, increasing the efficiency of the study. Central endoscopy reading is still at the beginning of its development, and the paradigms of central reading need refinement in terms of the number of readers, the process by which a final score is assigned, the selection and sequence of central readers, and the endoscopic indices of choice. PMID:27604978

  3. The Marstal Central Solar Heating Plant

    DEFF Research Database (Denmark)

    Heller, Alfred; Jochen, Dahm

    1999-01-01

    The central solar heating plant in Marstal is running since 1996 and has been monitored since. The resulting data from the plant is analysed and the plant performance evaluated. A TRNSYS-model (computersimulation) id prepared and validated based on the measured data from the plant. Acceptable good...

  4. Imaging of the fetal central nervous system

    NARCIS (Netherlands)

    Pistorius, L.R.

    2008-01-01

    Introduction : Ultrasound and MR imaging of the fetal central nervous system (CNS) develop at an ever-increasing rate. Theoretically, the two modalities should be synergistic, but a literature review revealed the difficulties of determining the merit of either technique and revealed gaps in our know

  5. Gabapentin inhibits central sensitization during migraine

    Institute of Scientific and Technical Information of China (English)

    Yanbo Zhang; Guo Shao; Wei Zhang; Sijie Li; Jingzhong Niu; Dongmei Hu; Mingfeng Yang; Xunming Ji

    2013-01-01

    Peripheral and central sensitizations are phenomena that occur during migraine. The role of pentin, a migraine preventive drug, on central sensitization remains unclear. In this study, a rat model of migraine was established by electrical stimulation of the trigeminal ganglion, and the an-imals were given intragastric gabapentin. Changes in amino acid content in the cerebrospinal fluid and protein kinase C membrane translocation in the spinal trigeminal nucleus were examined to clarify the mechanisms underlying the efficacy of gabapentin in the treatment of central sensitization during migraine. Electrophysiology, liquid chromatography-mass spectrometry and western blot analysis results revealed that gabapentin reduces neuronal excitability in the spinal nucleus in the trigeminal nerve, decreases excitatory amino acid content and inhibits the activation of protein ki-nase C. This provides evidence that excitatory amino acids and protein kinase C are involved in the formation and maintenance of central sensitization during migraine. Gabapentin inhibits migraine by reducing excitatory amino acid content in the cerebrospinal fluid and inhibiting protein kinase C ac-tivation.

  6. Housing Abroad: Central and Eastern Europe

    Czech Academy of Sciences Publication Activity Database

    Lux, Martin

    2. Los Angeles : Sage Publications, 2012, s. 320-322. ISBN 9781412989572 R&D Projects: GA ČR GA403/09/1915 Institutional support: RVO:68378025 Keywords : Housing * housing policy * Central and Eeastern Europe Subject RIV: AO - Sociology, Demography

  7. Larger foraminifera from Central Falcon (Venezuela)

    NARCIS (Netherlands)

    Gorter, Nettie E.; Vlerk, van der I.M.

    1931-01-01

    Dr. H. G. Kugler, chief geologist of the North Venezuelan Petroleum Company, at Puerto Cabello, entrusted us with the examination of a collection of larger foraminifera, selected from material collected by the geologists of this Company in Central Falcon. Dr. A. Senn kindly added material that had a

  8. Central modulation of cyclosporine-induced hypertension.

    Science.gov (United States)

    El-Gowelli, Hanan M; El-Mas, Mahmoud M

    2015-03-01

    Arterial hypertension is a considerable side effect that accompanies the clinical use of immunosuppressant drugs such as cyclosporine (CSA). In addition to promoting graft rejection, uncontrolled hypertension is a major risk factor for atherosclerosis, left ventricular hypertrophy, heart failure, and premature death. Most, if not all, reports that reviewed the hypertensive effect of CSA and underlying mechanisms focused on the roles of peripheral vasoactive machinaries, perhaps because of the limited capacity of CSA to diffuse to brain tissues and the lack of any appreciable effect for centrally administered CSA on blood pressure (BP) or central sympathetic outflow. This review focuses primarily on evidence that supports a modulatory role for central neural pathways, as go-between afferent and efferent sympathetic circuits, in the elicitation of the hypertensive action of CSA. Other areas covered briefly in the review include (1) an outline of peripheral mechanisms that contribute to the hypertensive action of CSA, and (2) comparisons of the BP effects of CSA and other calcineurin-dependent (tacrolimus) and independent (sirolimus) immunosuppressants. The knowledge of these mechanisms, central and peripheral, may permit the identification of new therapeutic strategies against CSA hypertension. PMID:25430438

  9. Prehistoric archaeology in Central Europe: beyond diversity

    Czech Academy of Sciences Publication Activity Database

    Sosna, D.; Kolář, Jan; Květina, Petr; Trampota, F.

    2013-01-01

    Roč. 51, č. 2 (2013), s. 123-130. ISSN 0323-1119. [ Theory and method in the prehistoric archaeology of Central Europe. Mikulov, 24.10.2012-26.10.2012] Institutional support: RVO:67985912 ; RVO:67985939 Keywords : archaeological theory * artefact * communication * environment * history of archaeology * reflexivity Subject RIV: AC - Archeology, Anthropology, Ethnology

  10. A central spent fuel storage in Sweden

    International Nuclear Information System (INIS)

    A planned central spent fuel storage facility in Sweden is described. The nuclear power program and quantities of spent fuel generated in Sweden is discussed. A general description of the facility is given with emphasis on the lay-out of the buildings, transport casks and fuel handling. Finally a possible design of a Swedish transportation system is discussed. (author)

  11. Dust on UA1 central detector

    CERN Multimedia

    1982-01-01

    In March 1982 the central derector of UA1 was contaminated by dirt in the compressed air used for cooling during the bakeout of the beam pipe. The lengthy cleaning imposed a change of the collider schedule (Annual Report 1982 p. 114).

  12. Universities and Knowledge Production in Central Europe

    Science.gov (United States)

    Kwiek, Marek

    2012-01-01

    The article discusses an East/West divide in Europe in university knowledge production. It argues that the communist and post-communist legacies in the four major Central European economies studied (Poland, Hungary, the Czech Republic and the Slovak Republic) matter substantially for educational and research systems. The differences in university…

  13. Central Limit Theorem for Coloured Hard Dimers

    Directory of Open Access Journals (Sweden)

    Maria Simonetta Bernabei

    2010-01-01

    Full Text Available We study the central limit theorem for a class of coloured graphs. This means that we investigate the limit behavior of certain random variables whose values are combinatorial parameters associated to these graphs. The techniques used at arriving this result comprise combinatorics, generating functions, and conditional expectations.

  14. Centrality measures for networks with community structure

    Science.gov (United States)

    Gupta, Naveen; Singh, Anurag; Cherifi, Hocine

    2016-06-01

    Understanding the network structure, and finding out the influential nodes is a challenging issue in large networks. Identifying the most influential nodes in a network can be useful in many applications like immunization of nodes in case of epidemic spreading, during intentional attacks on complex networks. A lot of research is being done to devise centrality measures which could efficiently identify the most influential nodes in a network. There are two major approaches to this problem: On one hand, deterministic strategies that exploit knowledge about the overall network topology, while on the other end, random strategies are completely agnostic about the network structure. Centrality measures that can deal with a limited knowledge of the network structure are of prime importance. Indeed, in practice, information about the global structure of the overall network is rarely available or hard to acquire. Even if available, the structure of the network might be too large that it is too much computationally expensive to calculate global centrality measures. To that end, a centrality measure is proposed here that requires information only at the community level. Indeed, most of the real-world networks exhibit a community structure that can be exploited efficiently to discover the influential nodes. We performed a comparative evaluation of prominent global deterministic strategies together with stochastic strategies, an available and the proposed deterministic community-based strategy. Effectiveness of the proposed method is evaluated by performing experiments on synthetic and real-world networks with community structure in the case of immunization of nodes for epidemic control.

  15. Best Minds Sought for Central Office, Startups

    Science.gov (United States)

    Maxwell, Lesli A.

    2009-01-01

    The central office isn't being overlooked in the movement to find and develop top talent for school districts. Although ways to recruit, groom, and keep top teachers and strong principals tend to dominate discussions of "human capital" needs in education, a handful of nonprofit organizations and foundations also see providing smart managers as…

  16. Bank Consolidation: A Central Banker's Perspective

    OpenAIRE

    Mishkin, Frederic S.

    1996-01-01

    This paper looks at why bank consolidation has been taking place in the United States and what the structure of the banking industry might look like in the future. It then discusses the implications of bank consolidation for the economy and the challenge it poses for central bankers.

  17. Stone age transitions. Neolithisation in central Scandinavia

    Directory of Open Access Journals (Sweden)

    Helena Knutsson

    2003-01-01

    Full Text Available A summary of a series of individual research projects focused on the processes from the Mesolithic to the Late Neolithic in central Scandinavia. The projects were embeded in the "Coast to Coast project". The historicity in this process was emphasised.

  18. Observatories in East and Central Europe

    Czech Academy of Sciences Publication Activity Database

    Hejda, Pavel

    Dordrecht: Springer, 2007 - (Gubbins, D.; Herrero-Bervera, E.), s. 728-729. (Encyclopedia of Earth sciences series). ISBN 978-1-4020-3992-8 Institutional research plan: CEZ:AV0Z30120515 Keywords : magnetic observatory * East and Central Europe * INTERMAGNET network Subject RIV: DE - Earth Magnetism, Geodesy, Geography

  19. Quantum Central Processing Unit and Quantum Algorithm

    Institute of Scientific and Technical Information of China (English)

    王安民

    2002-01-01

    Based on a scalable and universal quantum network, quantum central processing unit, proposed in our previous paper [Chin. Phys. Left. 18 (2001)166], the whole quantum network for the known quantum algorithms,including quantum Fourier transformation, Shor's algorithm and Grover's algorithm, is obtained in a unitied way.

  20. Problem of heat pumps in central Russia

    International Nuclear Information System (INIS)

    This article describes the problems of heat pumps due to climatic conditions and the characteristics of energy sources. As energy sources for heat pumps, solar power, air, groundwater, soil, and rejected heat are considered. It is shown that in central Russia it is only rational to use waste heat as an energy source for heat pump systems. (author)

  1. Intracranial calcification in central diabetes insipidus

    International Nuclear Information System (INIS)

    Intracranial calcification is a known but extremely rare complication of diabetes insipidus. To date, only 16 patients have been reported and all had the peripheral (nephrogenic) type of diabetes insipidus. We report a child with intracranial calcification complicating central diabetes insipidus. We also report a child with nephrogenic diabetes insipidus, and compare the patterns of intracranial calcification. (orig.)

  2. Azole-Resistant Central Nervous System Aspergillosis

    NARCIS (Netherlands)

    J.W.M. van der Linden; R.R. Jansen; D. Bresters; C.E. Visser; S.E. Geerlings; E.J. Kuijper; W.J.G. Melchers; P.E. Verweij

    2009-01-01

    Three patients with central nervous system aspergillosis due to azole-resistant Aspergillus fumigatus (associated with a leucine substitution for histidine at codon 98 [L98H] and a 34-base pair repeat in tandem in the promoter region) are described. The patients were treated with combination therapy

  3. Azole-resistant central nervous system aspergillosis.

    NARCIS (Netherlands)

    Linden, J.W.M. van der; Jansen, R.R.; Bresters, D.; Visser, C.E.; Geerlings, S.E.; Kuijper, E.J.; Melchers, W.J.G.; Verweij, P.E.

    2009-01-01

    Three patients with central nervous system aspergillosis due to azole-resistant Aspergillus fumigatus (associated with a leucine substitution for histidine at codon 98 [L98H] and a 34-base pair repeat in tandem in the promoter region) are described. The patients were treated with combination therapy

  4. Notes on Central Asian dragonflies (Insecta: Odonata)

    OpenAIRE

    Schoorl Jr., J.W.

    2000-01-01

    New and old material from Central Asia is published. In total 38 species are recorded from various locations in this region. For the more interesting species notes and figures are provided. One probably new Ischnura species is briefly described, but not formally named. For a, possibly new, subspecies of Sympetrum sinaiticum Dumont, 1977, a short diagnosis with figures is provided.

  5. Enhancing the Capability of Central Finance Agencies

    OpenAIRE

    Allen, Richard; Grigoli, Francesco

    2012-01-01

    A well-organized and effective finance ministry and its associated central finance agencies (CFAs) are essential to good fiscal outcomes. Recent studies of CFAs in selected low-income countries demonstrate that their organizational structure varies widely and that decision making on public finance is strongly influenced by political economy factors. This note presents some common themes ar...

  6. Central Virginia Community College 1999 Fact Book.

    Science.gov (United States)

    Hicks, Geoffrey

    The Fact Book is an annual publication of the Office of Research, Assessment and Planning at Central Virginia Community College (CVCC). It includes data and trends from 1994-1998 and is divided into six parts: (1) "The College" includes information on the College Board, institutional history, facilities, mission and goals, revenues and…

  7. The Centrality of Engagement in Higher Education

    Science.gov (United States)

    Fitzgerald, Hiram E.; Bruns, Karen; Sonka, Steven T.; Furco, Andrew; Swanson, Louis

    2016-01-01

    The centrality of engagement is critical to the success of higher education in the future. Engagement is essential to most effectively achieving the overall purpose of the university, which is focused on the knowledge enterprise. Today's engagement is scholarly, is an aspect of learning and discovery, and enhances society and higher education.…

  8. Ichthyofauna of the reservoirs of Central Vietnam

    Directory of Open Access Journals (Sweden)

    I. A. Stolbunov

    2012-01-01

    Full Text Available Species composition, distribution and abundance of fish in the pelagic and littoral zone of four reservoirs of Central Vietnam (Suoi Chau, Kam Lam, Da Ban and Suoi Dau were studied first. According to the research data the fish community of the reservoirs is represented by 43 species of 19 fish families.

  9. On the dimension of twisted centralizer codes

    OpenAIRE

    Glasby, S. P.; Praeger, Cheryl E.; Alahmadi, Adel

    2016-01-01

    Given a field $F$, a scalar $\\lambda\\in F$ and a matrix $A\\in F^{n\\times n}$, the twisted centralizer code $C_F(A,\\lambda):=\\{B\\in F^{n\\times n}\\mid AB-\\lambda BA=0\\}$ is a linear code of length $n^2$. When $A$ is cyclic and $\\lambda\

  10. Hypersensitivity Responses in the Central Nervous System

    DEFF Research Database (Denmark)

    Khorooshi, Reza; Asgari, Nasrin; Mørch, Marlene Thorsen;

    2015-01-01

    of pathology in neuromyelitis optica (NMO), a central nervous system (CNS) demyelinating disease where activated neutrophils infiltrate, unlike in MS. The most widely used model for MS, experimental autoimmune encephalomyelitis, is an autoantigen-immunized disease that can be transferred to naive...

  11. Exercise, Stress Resistance, and Central Serotonergic Systems

    OpenAIRE

    Greenwood, Benjamin N.; Fleshner, Monika

    2011-01-01

    Voluntary exercise reduces the incidence of stress-related psychiatric disorders in humans and prevents serotonin-dependent behavioral consequences of stress in rodents. Evidence reviewed herein is consistent with the hypothesis that exercise increases stress resistance by producing neuroplasticity at multiple sites of the central serotonergic system, which all help to limit the behavioral impact of acute increases in serotonin during stressor exposure.

  12. Central Exclusive Production at the LHC

    CERN Document Server

    Forshaw, J R

    2009-01-01

    After a brief resume of the theory underpinning the central exclusive process (CEP) pp \\to p+H+p, attention is focussed upon Higgs bosons produced in the Standard Model, the MSSM and the NMSSM. In all cases, CEP adds significantly to the physics potential of the LHC and in some scenarios it may be crucial.

  13. Notes on Central Asian dragonflies (Insecta: Odonata)

    NARCIS (Netherlands)

    Schoorl Jr., J.W.

    2000-01-01

    New and old material from Central Asia is published. In total 38 species are recorded from various locations in this region. For the more interesting species notes and figures are provided. One probably new Ischnura species is briefly described, but not formally named. For a, possibly new, subspecie

  14. Medical segetal flora of Central Poland

    OpenAIRE

    Warcholińska, Aurelia Urszula

    2008-01-01

    In the paper a list and general characterization of medical segetal flora of Central Poland is given. This flora consists of 300 taxa. Among the most threatened species there are 6 taxa: Adonis aestivalis, A. flam mea, Anagallis foemina, Bupleurum rotundifolium, Camelina saliva, Cuscuta europaea.

  15. Central control element expands computer capability

    Science.gov (United States)

    Easton, R. A.

    1975-01-01

    Redundant processing and multiprocessing modes can be obtained from one computer by using logic configuration. Configuration serves as central control element which can automatically alternate between high-capacity multiprocessing mode and high-reliability redundant mode using dynamic mode switching in real time.

  16. The Mediterranean fruit fly in Central America

    International Nuclear Information System (INIS)

    Various methods of controlling the medfly are available and include the use of insecticides, bait sprays and the sterile insect technique (SIT). Each of these control strategies may be used alone or in sequence. With regard to the application of the SIT, the Joint FAO/IAEA Division of Atomic Energy in Food and Agriculture through its Insect and Pest Control Section and Entomology Laboratory is in an excellent position to assist in containing the medfly in Central America. For the past 12 years, the laboratory has participated in all phases of medfly control by sterile insect releases in various climates. This involvement has included planning of medfly campaigns, development of pre-release techniques (bait spraying, trapping, etc.) and shipment and release of sterilized medflies. Small-scale field tests utilizing the SIT have been carried out by nine countries: Italy (Procida, Capri), Spain, Cyprus, Israel, Tunisia, Peru, Panama, Costa Rica and Nicaragua. Other field projects presently being counselled and serviced are located in Argentina, Venezuela and the Canary Islands. The research and development that are still needed to effectively stabilize and gain control of the medfly situation in Central America include: The development and use of effective quarantine procedures in various countries; Development of effective conventional medfly control procedures under the conditions found in Central America; Development of methods to determine the geographic origin of medflies introduced into new areas; Medfly mass production (viz. all aspects of rearing Central American strains); Assessing the performance (competitiveness, etc.) of various strains; Logistics, including the development of systems for releasing pre-adult stages; Genetic rearing methods: developmental research in this area is particularly promising since the preferential production of males would allow considerable savings in the rearing costs of medflies for release; Development of adequate surveillance

  17. Clinical analysis and treatment of central pain due to headinjury

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    @@Central pain is induced by the involvement of the abnormal pain pathway due to diseases of the central nervous system. Central pain after brain trauma is common clinically, but it is often misdiagnosed and neglected because of lack of objective disturbances. We treated 20 cases of central pain after head injury by invigorating blood circulation and satisfactory result was obtained.

  18. Clinical significance of central corneal thickness and comparison of central corneal thickness

    Directory of Open Access Journals (Sweden)

    Özgür Çakıcı

    2014-03-01

    Full Text Available Significance of central corneal thickness has been increasing in ophthalmology practice. It is an important clinical evaluation tool especially prior to refractive surgery and in diagnosis of glaucoma and keratoconus. Refractive surgery is planned according to preoperative central corneal thickness measurements. Besides, in order to determine actual intraocular pressure, central corneal thickness is measured and corrected eye pressure is obtained. Today, devices used in measurement of central corneal thickness do the measurement according to two principles. First and relatively older method is ultrasonic method. Optic method is the second and more recent method. In daily practice, the most commonly used clinical method in measurement of central corneal thickness is ultrasound pachymeter. However, this measurement technique requires contact between cornea and probe and gives thinner measurement results compared to the methods that use optic principle. Recently, several technologic methods based on optics have been put in use; they provide advantages of non-contact technique and objective determination of central corneal thickness. Of these methods, most commonly used include Specular Microscopy, Optical coherence tomography, Laser Doppler Interferometry, Optical low coherence reflectometry pachymetry, Optic based topographic mapping (also called screening section pachymetry and Pentacam. In this article, it was aimed to evaluate importance of central corneal thickness in clinical use and compare measurement methods. J Clin Exp Invest 2014; 5 (1: 153-158

  19. Solitary Median Maxillary Central Incisor Versus Agenesis of the Maxillary Central Incisor.

    Science.gov (United States)

    de Carvalho, Fabrício Kitazono; Arid, Juliana; De Rossi, Andiara; Paula-Silva, Francisco W G; Nelson-Filho, Paulo

    2016-01-01

    A solitary median maxillary central incisor (SMMCI) is rare and affected individuals may carry a potentially serious condition known as SMMCI syndrome. However, many of these cases do not receive proper attention because they are misdiagnosed as agenesis of the maxillary central incisor. The purpose of this manuscript is to report two cases of children with only one maxillary central incisor and draw diagnostic differences between the entities. A correct diagnosis is very important because if an SMMCI is confirmed, the patient should be referred for genetic counseling. PMID:27098718

  20. Harada Group Uniquely Determined by Centralizer of a 2-Central Involution

    Institute of Scientific and Technical Information of China (English)

    M. Kratzer; G.O. Michler; M. Weller

    2003-01-01

    In this article we show that the sporadic simple Harada group G is uniquely determined up to isomorphism by the centralizer CG(z) of a 2-central involution z of G. This strengthens Y. Segev's uniqueness theorem [24] which required the known structure of the centralizers of two non-conjugate involutions.Using the second author's algorithm [19], we also provide a self-contained existence proof for the Harada group G by giving matrix generators inside GL133(19).Furthermore, the character table of G is determined and representatives for the conjugacy classes of the group are given as short words in the generating matrices.

  1. Modelling Central Bank Independence and Inflation: Deus Ex Machina?

    OpenAIRE

    Dumiter Florin; Brezeanu Petre; Radu Claudia; Turcas Florin

    2015-01-01

    Central bank independence represents the core element of assessing the complex relationship between government and central bank, having at background the fundamental issue of a free monetary policy decision-making process from the hands of the political circle. However, central bank independence is a multilevel concept within some social, economic and behavioral implications both for the central banks and for the society at whole. Central bank independence is needed in order to establish an a...

  2. Does a Good Central Banker make a Difference?

    OpenAIRE

    Matthias Neuenkirch; Peter Tillmann

    2013-01-01

    The personalities of central bankers moved center stage during the recent financial crisis. Some central bankers even gained "superstar" status. In this paper, we evaluate the pivotal role of superstar central bankers by assessing the difference an outstanding governor makes to economic performance. We employ school grades given to central bankers by the financial press. A superstar central banker is one receiving the top grade. In a probit estimation we first relate the grades to measures of...

  3. HANFORD SITE CENTRAL PLATEAU CLEANUP COMPLETION STRATEGY

    Energy Technology Data Exchange (ETDEWEB)

    BERGMAN TB

    2011-01-14

    Cleanup of the Hanford Site is a complex and challenging undertaking. The U.S. Department of Energy (DOE) has developed a comprehensive vision for completing Hanford's cleanup mission including transition to post-cleanup activities. This vision includes 3 principle components of cleanup: the {approx}200 square miles ofland adjacent to the Columbia River, known as the River Corridor; the 75 square miles of land in the center of the Hanford Site, where the majority of the reprocessing and waste management activities have occurred, known as the Central Plateau; and the stored reprocessing wastes in the Central Plateau, the Tank Wastes. Cleanup of the River Corridor is well underway and is progressing towards completion of most cleanup actions by 2015. Tank waste cleanup is progressing on a longer schedule due to the complexity of the mission, with construction of the largest nuclear construction project in the United States, the Waste Treatment Plant, over 50% complete. With the progress on the River Corridor and Tank Waste, it is time to place increased emphasis on moving forward with cleanup of the Central Plateau. Cleanup of the Hanford Site has been proceeding under a framework defmed in the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement). In early 2009, the DOE, the State of Washington Department of Ecology, and the U.S. Environmental Protection Agency signed an Agreement in Principle in which the parties recognized the need to develop a more comprehensive strategy for cleanup of the Central Plateau. DOE agreed to develop a Central Plateau Cleanup Completion Strategy as a starting point for discussions. This DOE Strategy was the basis for negotiations between the Parties, discussions with the State of Oregon, the Hanford Advisory Board, and other Stakeholder groups (including open public meetings), and consultation with the Tribal Nations. The change packages to incorporate the Central Plateau Cleanup Completion Strategy were

  4. Volar Central Portal in Wrist Arthroscopy.

    Science.gov (United States)

    Corella, F; Ocampos, M; Cerro, M Del; Larrainzar-Garijo, R; Vázquez, T

    2016-03-01

    Background Nowadays, the wrist is not limited to a dorsal visualization; the joint can be thought of as a "box," which can be visualized from almost every perspective. The purpose of this study was to describe a new volar central portal for the wrist, following three principles: a single incision that allows access to both the radiocarpal and midcarpal joints, centered on the lunate, with the volar structures at risk protected not only by retractors, but also by tendons. Description of Technique The incision begins in the distal wrist crease and extended 1.5 cm proximally up to the proximal wrist crease, following the axis of the third intermetacarpal space. The flexor superficialis tendons are identified and retracted toward the radial side. Next, the fourth and fifth flexor digitorum profundus tendons are retracted toward the ulnar side, while the third and second tendons are retracted toward the radial side. The volar central midcarpal portal is performed under direct vision just over the anterior horn of the lunate through the Poirier space. The volar central radiocarpal portal is created under the lunate through the interval between the ulnocarpal ligaments and the short radioulnar ligament. Methods An anatomical study was performed on 14 cadaver specimens. Two data were recorded: iatrogenic injuries of the structures at risk and the distances to the structures at risk. Results The median (interquartile range [IQR]) distances from the volar central radiocarpal portal to the median nerve, palmar cutaneous branch of the median nerve, and ulnar neurovascular bundle were 10.5 (7.8-15.0), 18.5 (15.8-20.3), and 7.0 (5.0-10.5) mm, respectively. The median (IQR) distances from the volar central midcarpal portal to the median nerve, palmar cutaneous branch of the median nerve, and ulnar neurovascular bundle were 7.0 (4.8-10.3), 16.0 (14.8-19.0), and 4.5 (3.8-9.0) mm, respectively. No iatrogenic injuries were observed. Conclusion The volar central portal is

  5. THE ALLIANCE TRACHYNION DISTACHYAE RIVAS-MARTINEZ 1978 IN CENTRAL ITALYIN CENTRAL ITALY

    Directory of Open Access Journals (Sweden)

    M. DE SANCTIS

    2010-01-01

    Full Text Available The therophytic basiphilous vegetation of Central Italy has been generally framed in a single association Trifolio scabri- Hypochoeridetum achyrophori Biondi et al. 1997. We show that a considerable floristic variation exists inside Trifolio-Hypochoeridetum in Central Italy, and that it should be treated as a complex of no less than five different associations: Medicagini rigidulae-Trifolietum scabri Fanelli et al. hoc loco, Trifolio scabri-Hypochoeridetum achyrophori Biondi, Izco. Ballelli & Formica 1997 s.s, Hippocrepido siliquosae- Brachypodietum distachyi Fanelli et al. ad interim, Trigonello gladiatae-Brachypodietum distachyi Fanelli et al. hoc loc, Crucianello latifoliae-Hypochoeridetum achyrophori Filesi, Blasi, Di Marzio 1996. These associations are floristically and ecologically distinct, and show different geographical ranges in Central Italy. The great diversity of Trachynion distachyae in Central Italy is related to the widespread occurrence of limestone and calcareous alluvial rocks and to a climate with abundant winter and autumn rains very favourable to the development of winter annuals.

  6. Communities, households and animals: convergent developments in Central Anatolian and Central European neolithic:

    OpenAIRE

    Marciniak, Arkadiusz

    2008-01-01

    This paper intends to scrutinize striking similarities in cultural developments and social transformations in Neolithic communities in the North European Plain of Central Europe and Central Anatolia in the early phase of their development and in the following post-Eearly Neolithic period. They will be explored through evidence pertaining to architecture and the organization of space, alongside changes in settlement pattern, as well as animal bone assemblages and zoomorphic representations. So...

  7. Communities, households and animals. Convergent developments in Central Anatolian and Central European Neolithic

    OpenAIRE

    Arkadiusz Marciniak

    2008-01-01

    This paper intends to scrutinize striking similarities in cultural developments and social transformations in Neolithic communities in the North European Plain of Central Europe and Central Anatolia in the early phase of their development and in the following post-Eearly Neolithic period. They will be explored through evidence pertaining to architecture and the organization of space, alongside changes in settlement pattern, as well as animal bone assemblages and zoomorphic representations. So...

  8. Central nervous control of energy and glucose balance: focus on the central melanocortin system

    OpenAIRE

    Xu, Yong; Elmquist, Joel K.; Fukuda, Makoto

    2011-01-01

    Studies have suggested that manipulations of the central melanocortin circuitry by pharmacological agents produce robust effects on the regulation of body weight and glucose homeostasis. In this review, we discuss recent findings from genetic mouse models that have further established the physiological relevance of this circuitry in the context of glucose and energy balance. In addition, we will discuss distinct neuronal populations that respond to central melanocortins to regulate food intak...

  9. Central Asia's raging waters the prospects of water conflict in Central Asia

    OpenAIRE

    Hartman, William B.

    2007-01-01

    This thesis examines the prospects of conflict caused by water scarcity in Central Asia. The thesis analyzes the three most recent political eras of Central Asia, Tsarist Russia, the Soviet Union and independence, utilizing indicators of water tensions including: water quality, water quantity, the management of water for multiple uses, the political divisions and geopolitical setting, state institutions and national water ethos. Although water is not likely to be the sole cause of a majo...

  10. Expansion of museums in Central Europe?

    Directory of Open Access Journals (Sweden)

    Jagodzińska, Katarzyna

    2015-06-01

    Full Text Available The paper presents reflections on the specificity of collections and museums of contemporary art in Central Europe and considers a possibility of creating a regional alternative for the West. The analysis is conducted in the context of the expansionist policy of contemporary museums – notably the Louvre, the Guggenheim Foundation, and the Hermitage – whose numerous new development projects gave rise to a number of dilemmas in the museological world. The author discusses global "museum brands" that invest in Central Europe and addresses the possible profits of the expansion of such "concerns" for culture in the region, as well as emphasises the potential of the region itself, which may be used for its development without the avail of the internationally renowned collectors' names.

  11. Centralizers in simple locally finite groups

    Directory of Open Access Journals (Sweden)

    Mahmut Kuzucuoğlu

    2013-03-01

    Full Text Available This is a survey article on centralizers of finitesubgroups in locally finite, simple groups or LFS-groups as wewill call them. We mention some of the open problems aboutcentralizers of subgroups in LFS-groups and applications of theknown information about the centralizers of subgroups to thestructure of the locally finite group. We also prove thefollowing: Let $G$ be a countably infinite non-linear LFS-groupwith a Kegel sequence $mathcal{K}={(G_i,N_i | iinmathbf{N} }$. If there exists an upper bound for ${ |N_i| |iin mathbf{N} }$, then for any finite semisimplesubgroup $F$ in $G$ the subgroup $C_G(F$ has elements oforder $p_i$ for infinitely many distinct prime $p_i$. Inparticular $C_G(F$ is an infinite group. This answers Hartley'squestion provided that there exists a bound on ${ |N_i| | iin mathbf{N}$.

  12. Hydropower development in the Central Himalayas

    Energy Technology Data Exchange (ETDEWEB)

    Singh, N. (Irrigation Design Organization, Rourkee (India))

    1992-10-01

    The Central Himalayas comprise eight hill districts of the State of Uttar Pradesh, India. These mountains are the source of the Ganga and its main tributaries: the Yamuna, Ramganga and Sarda rivers. The identified hydro potential of the Ganga, Yamuna, Sarda and their tributaries in the Central Himalayas is about 30 000 MW, with an annual average energy potential of 100 TWh. The projects which have been completed so far have only developed 3.2 per cent of this potential. The projects which are now under construction will exploit another 10.4 per cent of the potential. Thus, the untapped potential is as much as 85 per cent of the total. The minor tributaries also offer vast potential for mini and micro hydroelectric stations. In most conservative estimates, this potential is about 2000 MW. (author).

  13. Simulation of macroseismic field in Central Greece

    Directory of Open Access Journals (Sweden)

    J. Drakopoulos

    1996-06-01

    Full Text Available The distribution of seismic intensity is generally influenced by major geological and tectonic features and, on a smaller scale, by local geological conditions, such as the type of surface soil, the surface-to-bedrock soil structure in sedimentary basins and the depth of the saturated zone, The present paper attempted to determine the distribution of macroseismic intensities based on published attenuation laws in the area of Central Greece, using the epicentral intensity, magnitude, length and direction of fault and a considerable number of observation sites, for which the above mentioned information is available, The expected intensity values were then compared to those observed in the same sites, from four earthquakes in Volos, Central Greece, for which the fault plane solutions are also known. The deviations of the observed values from the theoretical model were then related to the local geological conditions and the corresponding correction factor determined for each site.

  14. Glandular odontogenic cyst mimicking central mucoepidermoid carcinoma

    Directory of Open Access Journals (Sweden)

    Prabhu Sudeendra

    2010-01-01

    Full Text Available Glandular odontogenic cyst (GOC is a rare developmental cyst of the jaws. The most common site of occurrence is the anterior mandible, and it is most commonly seen in middle-aged people. It is a destructive lesion with a high rate of recurrence. A predilection for men is observed. Clinical and radiographic findings are not specific, and it can mimic as any other destructive lesion of the jaw. The histopathological features of GOC and those of low-grade central mucoepidermoid carcinoma (MEC are similar. Often, they are misdiagnosed as MEC. We present a case of GOC in the posterior maxilla, which is a rare site. The similarities and differences between GOC and central MEC are also discussed.

  15. Hitherto unreported Agaricus species of Central India

    Directory of Open Access Journals (Sweden)

    MAHENDRA KUMAR RAI

    2010-11-01

    Full Text Available Karwa A, Rai MK. 2010. Hitherto unreported Agaricus species of Central India. Nusantara Bioscience 2: 141-145. Melghat forest region from Central India was surveyed for occurrence of medicinal and culinary mushrooms during the years 2005-2008. Out of total 153 species, ten species of Agaricus were recorded from different localities. Of these, seven species namely Agaricus bitorquis, A. subrufescens, A. augustus, A. placomyces, A. essettei, A. basioanolosus and Agaricus sp. nov (a new species are being reported for the first time from the region. The commercial button mushroom Agaricus bisporus lacks good breeding characters due to its bisporic nature. These wild cousins of the button mushroom can definitely prove to be a good source of genetic manipulations to the existing strains and also to develop new strains with improved characters.

  16. Spherical explosion with a central energy source

    Science.gov (United States)

    Masuyama, Miyu; Shigeyama, Toshikazu; Tsuboki, Yoichiro

    2016-04-01

    We present a novel semi-analytic solution that describes the propagation of a spherical blast wave driven by a central energy source. The initial density profile has a power-law function of the distance from the center and the energy is injected only into the central region at a rate given by a power-law function of time. This solution is composed of three regions separated by the contact surface and the shock front. The innermost region is assumed to be uniform and the outside of the contact surface includes the shocked matter described by self-similar solutions. We analytically derive the applicable range of parameters of this solution from requirements needed to satisfy the boundary conditions. We perform numerical simulations for flows with various values of parameters, some of which reside out of the thus-derived applicable range, and compare the results with the semi-analytic solutions.

  17. A study of Central Exclusive Production

    Energy Technology Data Exchange (ETDEWEB)

    Monk, James; /Manchester U.

    2008-09-01

    Central exclusive production of a system X in a collision between two hadrons h is defined as hh {yields} h + X + h with no other activity apart from the decay products of X. This thesis presents predictions for the production cross section of a CP violating supersymmetric Higgs boson and the radion of the Randall-Sundrum model. The ExHuME Monte Carlo generator was written to simulate central exclusive processes and is described and explored. A comparison to di-jet observations made by the D0 detector at the Tevatron, Fermilab between January and June 2004 is made and the distributions found support the predictions of ExHuME.

  18. Spherical explosion with central energy source

    CERN Document Server

    Masuyama, Miyu; Tsuboki, Yoichiro

    2015-01-01

    We present a novel semi-analytic solution describing the propagation of a spherical blast wave driven by a central energy source. The initial density profile has a power-law function of the distance from the center and the energy is injected only into the central region at a rate given by a power-law function of time. This solution is composed of three regions separated by the contact surface and the shock front. The innermost region is assumed to be uniform and the outside of the contact surface includes the shocked matter described by self-similar solutions. We analytically derive the applicable range of parameters of this solution from requirements to satisfy boundary conditions. We perform numerical simulations for flows with various values of parameters, some of which reside out of the thus derived applicable range, and compare with the semi-analytic solutions.

  19. Centralization vs. decentralization in medical school libraries.

    Science.gov (United States)

    Crawford, H

    1966-07-01

    Does the medical school library in the United States operate more commonly under the university library or the medical school administration? University-connected medical school libraries were asked to indicate (a) the source of their budgets, whether from the central library or the medical school, and (b) the responsibility for their acquisitions and cataloging. Returns received from sixtyeight of the seventy eligible institutions showed decentralization to be much the most common: 71 percent of the libraries are funded by their medical schools; 79 percent are responsible for their own acquisitions and processing. The factor most often associated with centralization of both budget and operation is public ownership. Decentralization is associated with service to one or two rather than three or more professional schools. Location of the medical school in a different city from the university is highly favorable to autonomy. Other factors associated with these trends are discussed. PMID:5945568

  20. Iowa Central Quality Fuel Testing Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Heach, Don; Bidieman, Julaine

    2013-09-30

    The objective of this project is to finalize the creation of an independent quality fuel testing laboratory on the campus of Iowa Central Community College in Fort Dodge, Iowa that shall provide the exploding biofuels industry a timely and cost-effective centrally located laboratory to complete all state and federal fuel and related tests that are required. The recipient shall work with various state regulatory agencies, biofuel companies and state and national industry associations to ensure that training and testing needs of their members and American consumers are met. The recipient shall work with the Iowa Department of Ag and Land Stewardship on the development of an Iowa Biofuel Quality Standard along with the Development of a standard that can be used throughout industry.

  1. Diagnosis and treatment of central diabetes insipidus

    Directory of Open Access Journals (Sweden)

    Ekaterina Aleksandrovna Pigarova

    2014-11-01

    Full Text Available Diabetes insipidus represents a serious disease that dramatically interferes with the everyday life of patients due to the need to constantly replenish of fluid lost in the urine, which comes amid shortage of synthesis, secretion or action of pituitary hormone vasopressin. The main difficulty is the differential diagnosis of types of diabetes insipidus in patients with the syndrome of polydipsia-polyuria as the correct differential diagnosis of these forms predetermine the safety and efficacy of further treatment. This lecture presents the current concepts of etiology, diagnosis and treatment of central diabetes insipidus (CDI. We give the comparative characteristics of various preparations of desmopressin for the treatment of the central form of the disease. We also consider the features of the management of selected patient populations with CDI: during pregnancy and lactation, pathology of the thirst sensation, after traumatic brain injury and neurosurgery.

  2. MINT centralized radiation monitoring system via ethernet

    International Nuclear Information System (INIS)

    Computer networking technologies allow user to receive data and other information easier and faster. This paper describes the development of centralized radiation monitoring system for monitoring of area radiation levels in various locations in MINT complex via Ethernet. The system utilizes a Local Area Network (LAN) known as MINT-NET as a communication media for data acquisition of the area radiation levels from radiation detectors. The development of the system involves system configuration, wiring and hardware installation, interface and software development. Apart from that data distribution package in a web form is also developed. Besides monitoring the area radiation levels in MINT centrally, additional features are developed for effective radiation level trend observation and studies. (Author)

  3. Central auditory neurons have composite receptive fields.

    Science.gov (United States)

    Kozlov, Andrei S; Gentner, Timothy Q

    2016-02-01

    High-level neurons processing complex, behaviorally relevant signals are sensitive to conjunctions of features. Characterizing the receptive fields of such neurons is difficult with standard statistical tools, however, and the principles governing their organization remain poorly understood. Here, we demonstrate multiple distinct receptive-field features in individual high-level auditory neurons in a songbird, European starling, in response to natural vocal signals (songs). We then show that receptive fields with similar characteristics can be reproduced by an unsupervised neural network trained to represent starling songs with a single learning rule that enforces sparseness and divisive normalization. We conclude that central auditory neurons have composite receptive fields that can arise through a combination of sparseness and normalization in neural circuits. Our results, along with descriptions of random, discontinuous receptive fields in the central olfactory neurons in mammals and insects, suggest general principles of neural computation across sensory systems and animal classes. PMID:26787894

  4. Regulation of protein prenyltransferase in central neurons

    OpenAIRE

    Zhou, Xiu-Ping; Luo, Zhen-Ge

    2009-01-01

    Geranylgeranyltransferase I (GGT) is a protein prenyltransferase that mediates lipid modification of some proteins such as Rho family small GTPases. Since the activation of Rho GTPases mediates tumorgenesis and metastasis, GGT has become an attractive target for anti-tumor drug design. Although GGT is extensively expressed in the brain, the function of GGT in central nervous system (CNS) is totally unknown. We have previously shown that GGT was involved in neuromuscular synaptogenesis. In thi...

  5. CDF Central Preshower and Crack Detector Upgrade

    OpenAIRE

    Artikov, A.

    2007-01-01

    The CDF Central Preshower and Crack Detector Upgrade consist of scintillator tiles with embedded wavelength-shifting fibers, clear-fiber optical cables, and multi-anode photomultiplier readout. A description of the detector design, test results from R&D studies, and construction phase are reported. The upgrade was installed late in 2004, and a large amount of proton-antiproton collider data has been collected since then. Detector studies using those data are also discussed.

  6. Ethnobotanical remarks on Central and Southern Italy

    OpenAIRE

    Lucia Leporatti; Guarrera Paolo

    2007-01-01

    Abstract Background The present paper is a brief survey on the ethnobotanical works published by the Authors since 1981, concerning the research carried out in some southern and central Italian regions. Before Roman domination these territories were first inhabited by local people, while the southern areas were colonized by the Greeks. These different cultural contributions left certain traces, both in the toponyms and in the vernacular names of the plants and, more generally, in the culture ...

  7. Nuclear insurance in Central and Eastern Europe

    International Nuclear Information System (INIS)

    In the world outside the former Soviet Union, insurance industries in their respective domestic markets have pooled their resources so as to provide a secure and cost-effective conduit for the transaction of insurance business on behalf of the nuclear industry. These are the so-called nuclear pools. This paper explains the four main principles behind nuclear liability insurance and discusses their application to Central Europe and in particular to the problems facing the nuclear industry in Eastern Europe. (author)

  8. A Central Limit Theorem for Punctuated Equilibrium

    OpenAIRE

    Bartoszek, Krzysztof

    2016-01-01

    Current evolutionary biology models usually assume that a phenotype undergoes gradual change. This is in stark contrast to biological intuition, which indicates that change can also be punctuated - the phenotype can jump. Such a jump can especially occur at speciation, i.e. dramatic change occurs that drives the species apart. Here we derive a central limit theorem for punctuated equilibrium. We show that, if adaptation is fast, for weak convergence to hold, dramatic change has to be a rare e...

  9. RETAIL SUPPLY CHAIN MANAGEMENT THROUGH CENTRALIZED DISTRIBUTION

    OpenAIRE

    Davor Dujak

    2012-01-01

    The paper reviews the trends in the design of distribution systems in retail supply chain management. Through goals, design decisions and costs of distribution system or distribution network, the paper points to the complexity and importance of this area of supply chain management. The goal of paper is to present modern trends in the distribution system, as well as specify the advantages and disadvantages of the leading distribution systems, with a special emphasis on the central distribution...

  10. Hedge funds: a central bank perspective.

    OpenAIRE

    Weber, A.A

    2007-01-01

    The international financial system is undergoing a sustained process of structural change characterised by features such as the rapid growth of the hedge fund industry and credit risk transfer markets. In general, this development should generate positive effects for the efficiency of the financial markets. As the financial system is becoming more complex and less transparent, however, it is becoming a growing challenge for central banks to make an adequate assessment of the potential risks t...

  11. Urban Governance and Participation in Central Mexico

    OpenAIRE

    Valeria Guarneros-Meza

    2007-01-01

    Valeria Guarneros-Meza looks at national aspects that characterize Mexico's democratization and decentralization processes, and their impact upon the central region of Mexico. Based on the region's social characteristics, she discusses the concept of ‘urban governance’ in terms of its ambiguity, which promotes municipal systems of participation at the same time as it fragments their internal organization. Development (2007) 50, 104–109. doi:10.1057/palgrave.development.1100340

  12. Virasoro central charges for Nichols algebras

    CERN Document Server

    Semikhatov, A M

    2011-01-01

    Virasoro central charge associated with Nichols algebras is invariant under the Weyl groupoid action and takes very suggestive values for some items in Heckenberger's list of rank-2 Nichols algebras. In particular, this might be taken as an indication of the existence of reasonable logarithmic extensions of W3==WA2, WB2, and WG2 models of conformal field theory. In the W3 case, the construction of an octuplet extended algebra is outlined.

  13. Probabilistic seismic hazard assessment for Central Asia

    Directory of Open Access Journals (Sweden)

    Shahid Ullah

    2015-04-01

    Full Text Available Central Asia is one of the seismically most active regions in the world. Its complex seismicity due to the collision of the Eurasian and Indian plates has resulted in some of the world’s largest intra-plate events over history. The region is dominated by reverse faulting over strike slip and normal faulting events. The GSHAP project (1999, aiming at a hazard assessment on a global scale, indicated that the region of Central Asia is characterized by peak ground accelerations for 10% probability of exceedance in 50 years as high as 9 m/s2. In this study, carried out within the framework of the EMCA project (Earthquake Model Central Asia, the area source model and different kernel approaches are used for a probabilistic seismic hazard assessment (PSHA for Central Asia. The seismic hazard is assessed considering shallow (depth < 50 km seismicity only and employs an updated (with respect to previous projects earthquake catalog for the region. The seismic hazard is calculated in terms of macroseismic intensity (MSK-64, intended to be used for the seismic risk maps of the region. The hazard maps, shown in terms of 10% probability of exceedance in 50 years, are derived by using the OpenQuake software [Pagani et al. 2014], which is an open source software tool developed by the GEM (Global Earthquake Model foundation. The maximum hazard observed in the region reaches an intensity of around 8 in southern Tien Shan for 475 years mean return period. The maximum hazard estimated for some of the cities in the region, Bishkek, Dushanbe, Tashkent and Almaty, is between 7 and 8 (7-8, 8.0, 7.0 and 8.0 macroseismic Intensity, respectively, for 475 years mean return period, using different approaches. The results of different methods for assessing the level of seismic hazard are compared and their underlying methodologies are discussed.

  14. Central Nevada Test Area Monitoring Report

    International Nuclear Information System (INIS)

    Water level measurements were performed and water samples collected from the Central Nevada Test Area model validation wells in September 2006. Hydraulic head measurements were compared to previous observations; the MV wells showed slight recovery from the drilling and testing operation in 2005. No radioisotopes exceeded limits set in the Corrective Action Decision Document/Corrective Action Plan, and no significant trends were observed when compared to previous analyses

  15. JUNO Central Detector and its prototyping

    Science.gov (United States)

    Wang, Zhimin

    2016-05-01

    JUNO is a multi-purpose underground liquid scintillator experiment; its R&D and civil construction all are in progress. During this July, 2015, JUNO collaboration selects the acrylic option as central detector (CD) scheme. The R&D progress of support point structure and acrylic panel of CD acrylic option all are in good shape. At the same time, a prototype detector of JUNO is designed and under construction, the goal is mainly to study different PMTs, background, electronics etc.

  16. Pandillas and Security in Central America

    OpenAIRE

    Thomas C. Bruneau

    2014-01-01

    This article introduces the topic of pandillas (street gangs) and their implications for security in Central America. There is minimal scholarly literature on pandillas and security. In part this is due to serious challenges in analyzing pandillas. First, pandilla members consider truth to be situational; data derived directly from them is suspect. Second, those who know most about them are involved in NGOs that rely on foreign assistance for their work. The project reports the...

  17. The energy future of Central Europe; Slovakia

    International Nuclear Information System (INIS)

    In this part of the book author deals with the energy future of Central Europe. The energy strategy, structure of energy supplies in Austria, Slovakia, the Czech Republic, Hungary and Bavaria, as well as restructuralization of the energy sources are analysed. From the ecological perspective, the Gabcikovo-Nagymaros Project (GNP) represents a very clear example, since the Project could play a very important role as a part of the strategy to reject nuclear energy , the same strategy that was clearly declared by the Austrian government, as well as for a transportation strategy based more on railroads and navigation. The GNP could serve as an impulse promoting further and more close Central European cooperation in renewable energy sources. It could assist in harmonization of the interest in the sphere of transportation policies of Switzerland, Bavaria, Austria, Slovakia, and Hungary. Such a community oriented towards common interests would definitely be of enormous importance for the development of transportation in Central Europe. Geothermal potential of Slovakia and other Central European states are presented. Surveys conducted in Slovakia show that it is possible to reduce pollution in specific areas by substituting fossil energy sources with geothermal heating a total reduction of pollution by 39,000 tons annually, out of which 159 tons represent the annual reduction of sulfur dioxide pollution. The reduction per GWh of geothermal heat in the particular cities was calculated to be about 527 tons of carbon dioxide and 2.1 ton of sulfur dioxide. Other opportunities for renewable energy in Slovakia, as well as potential of energy savings are estimated

  18. The Journal Rankings of Central Banks

    OpenAIRE

    Kohlscheen, Emanuel

    2011-01-01

    This paper analyzes the citation patterns of the central banks of the 15 largest monetary areas of the world that had an active working paper series in 2010. It proceeds to construct a novel journal ranking that is more suited for monetary authorities than the academic journal rankings currently in vogue. We report individual country rankings as well as the global rankings. While important regional differences emerge, the Journal of Monetary Economics, the American Economic Review, the Journa...

  19. INTERNATIONAL TERRORISM AND CENTRAL ASIA: PREMATURE ASSESSMENTS

    OpenAIRE

    Sabol, Steven

    2008-01-01

    In the months leading up to, and the first few years after, the Soviet Union collapsed numerous articles and books were published that claimed Islamic "fundamentalism" was likely to emerge in Central Asia. These fears were predicated on numerous scenarios, the most important being the ongoing political and military crisis in Afghanistan and Iranian attempts to increase its influence in the region. I will argue, however, that these concerns were premature and that the real threat to the stabil...

  20. CENTRAL ASIA IN SEARCH OF STABILITY

    OpenAIRE

    Plastun, Vladimir

    2008-01-01

    The tension in the Central Asian Region, particularly in its southern part, which includes Afghanistan, Pakistan, and Iran, largely affects the rest of this vast area and forces the United States and its allies to seek prompt settlement of the crisis they have on their hands. The situation in occupied Iraq is tense; the Turkish invasion into Iraqi Kurdistan in search of terrorists of the Kurdistan Workers’ Party did nothing to relieve the tension; the conflict area spread even further. Two ot...

  1. Central sleep apnoea—a clinical review

    OpenAIRE

    Muza, Rexford T.

    2015-01-01

    Central sleep apnoea (CSA) is characterised by recurrent apnoeas during sleep with no associated respiratory effort. It mostly results from withdrawal of the wakefulness drive in sleep leaving ventilation under metabolic control. A detailed physiological understanding of the control of breathing in wakefulness and sleep is essential to the understanding of CSA. It encompasses a diverse group of conditions with differing aetiologies and pathophysiology. Likewise treatment varies according to u...

  2. Human Rights Training for Central Government Officials

    Institute of Scientific and Technical Information of China (English)

    OUR STAFF REPORTER

    2007-01-01

    @@ More than 50 officials from central government departments attended a human rights training class held in Nanchang,Jiangxi Province, on May 29-June 2. The class was sponsored by the State Council Information Office, during which the trainees attended lectures given on China's human rights concepts and the current human rights conditions in the country,human rights theories and international human rights instruments and protection of human rights under the rule of law.

  3. Time perception mechanisms at central nervous system

    OpenAIRE

    Rhailana Fontes; Jéssica Ribeiro; Gupta, Daya S.; Dionis Machado; Fernando Lopes-Júnior; Francisco Magalhães; Victor Hugo Bastos; Kaline Rocha; Victor Marinho; Gildário Lima; Bruna Velasques; Pedro Ribeiro; Marco Orsini; Bruno Pessoa; Marco Antonio Araujo Leite

    2016-01-01

    The five senses have specific ways to receive environmental information and lead to central nervous system. The perception of time is the sum of stimuli associated with cognitive processes and environmental changes. Thus, the perception of time requires a complex neural mechanism and may be changed by emotional state, level of attention, memory and diseases. Despite this knowledge, the neural mechanisms of time perception are not yet fully understood. The objective is to relate the mechanisms...

  4. Central nervous system tumors: a histopathological study

    OpenAIRE

    Kailash Chand Jat; S. P. Vyas; Naseem A. Bihari; Kuldeep Mehra

    2016-01-01

    Background: Brain tumors can originate in almost any type of tissue, cell or mixture of cell types in the brain or spinal cord. Tumors in different areas of the central nervous system may be treated differently and have a different prognosis. Methods: In the period between 2011-2015, we studied on 59 patients diagnosed with CNS tumors according to the World Health Organization's diagnostic criteria. Patient data were retrieved from the archives of the department of Pathology, Sardar Patel...

  5. Central Nervous System Immune Reconstitution Inflammatory Syndrome

    OpenAIRE

    Bahr, Nathan; Boulware, David R; Marais, Suzaan; Scriven, James; Wilkinson, Robert J.; Meintjes, Graeme

    2013-01-01

    Central nervous system immune reconstitution inflammatory syndrome (CNS-IRIS) develops in 9 %–47 % of persons with HIV infection and a CNS opportunistic infection who start antiretroviral therapy and is associated with a mortality rate of 13 %–75 %. These rates vary according to the causative pathogen. Common CNS-IRIS events occur in relation to Cryptococcus, tuberculosis (TB), and JC virus, but several other mycobacteria, fungi, and viruses have been associated with IRIS. IRIS symptoms often...

  6. Serological study of Leptospirosis in central Nepal

    OpenAIRE

    2013-01-01

    Background: Leptospirosis, an infectious disease caused by spirochetes of the genus Leptospira, is the most wide-spread zoonosis in the world. Humans acquire infection through contact with the urine of infected or carrier animals, either directly or through contaminated water or soil. There are only few reports documenting the serological evidence of leptospirosis in Nepal. Thus, present study aims to determine the status of leptospirosis in central Nepal. Material and Methods: A descriptive ...

  7. The central part of CMS is lowered

    CERN Multimedia

    Maximilien Brice

    2007-01-01

    On 28 February 2007, the CMS central piece containing the magnet and weighing as much as five Jumbo jets (1920 tonnes) was gently lowered into place. Only 20 cm separated the detector, which was suspended by four huge cables, each with 55 strands and sophisticated monitoring to minimize sway and tilt, from the walls of the shaft. The entire process took about 10 hours to complete.

  8. Highly-anisotropic hydrodynamics for central collisions

    CERN Document Server

    Ryblewski, Radoslaw

    2016-01-01

    The framework of leading-order anisotropic hydrodynamics is supplemented with realistic equation of state and self-consistent freeze-out prescription. The model is applied to central proton-nucleus collisions. The results are compared to those obtained within standard Israel-Stewart second-order viscous hydrodynamics. It is shown that the resulting hadron spectra are highly-sensitive to the hydrodynamic approach that has been used.

  9. Solar activity and climate in Central America

    OpenAIRE

    Javier Bonatti; Esteban Araya; Walter Fernández

    2000-01-01

    Possible effects of solar activity on the records of air surface temperature and rainfall in Central America are analysed. The correlation between the series of sunspot numbers, surface air temperature and precipitation, is poor. However an increasing tendency in the series is observed for the time period considered. Using Fourier analysis, frequency peaks were found close to 11 years and 5 years for both solar and climate data. This suggest that solar activity might be a factor which affects...

  10. AMPHIBIAN MITIGATION MEASURES IN CENTRAL-EUROPE

    OpenAIRE

    Puky, Miklós

    2003-01-01

    Studies from different continents have proved amphibians to be the most frequently killed vertebrates on roads. In Central-Europe their ratio is between 70 and 88 percent. Local populations are known to become extinct or genetically isolated, and avoidance is also recognised, especially where the road network is dense and the traffi c is intensive. Besides ecological and conservation considerations, amphibian road kills also present a hazard for motorists when amphibians migrate in large numb...

  11. The emergence of echinococcosis in central Asia

    OpenAIRE

    Torgerson, P.R.

    2013-01-01

    Following the collapse of the Soviet Union in 1991, there was an increase in the number of cases of human echinococcosis recorded throughout central Asia. Between 1991 and 2001 incidence rates of cystic echinococcosis (CE) increased by 4 fold or more. There also appeared to be increases in prevalence of CE in livestock and prevalences of Echinococcus granulosus reported in dogs. The increase in human echinococcosis was associated with changes in livestock husbandry, decline in veterinary publ...

  12. WHITHER "HEARTLAND"? CENTRAL ASIA, GEOGRAPHY AND GLOBALIZATION

    OpenAIRE

    Hekimoglu, Levent

    2005-01-01

    This article attempts a double task. First, it looks at the main premises of Halford J. Mackinder's analysis in his renowned 1904 address to the Royal Geographical Society, The Geographical Pivot of History, and discusses some of the problems. It observes that these problems have actually rendered the whole Heartland thesis a fallacy from its very inception, and argues that this resilient fallacy continues to distort perceptions and policies in/on Central Asia. Second, it draws attention to t...

  13. Ocelot (Leopardus pardalis) Density in Central Amazonia

    OpenAIRE

    Daniel Gomes da Rocha; Rahel Sollmann; Emiliano Esterci Ramalho; Renata Ilha; Tan, Cedric K. W.

    2016-01-01

    Ocelots (Leopardus pardalis) are presumed to be the most abundant of the wild cats throughout their distribution range and to play an important role in the dynamics of sympatric small-felid populations. However, ocelot ecological information is limited, particularly for the Amazon. We conducted three camera-trap surveys during three consecutive dry seasons to estimate ocelot density in Amanã Reserve, Central Amazonia, Brazil. We implemented a spatial capture-recapture (SCR) model that shared ...

  14. Scripts and politics in modern Central Europe

    OpenAIRE

    Kamusella, Tomasz Dominik

    2012-01-01

    At present two scripts are employed in Central Europe, Latin and Cyrillic, or three,if we include Greece in the region. In this article I set out to problematise this oversimplisticpicture drawing at examples from the past and pointing to various politicaland identificational uses of scripts today. Until the mid-20th century, also other scripts(and different types of the Latin and Cyrillic script, for that matter) were used forofficial purposes and in book production, namely Arabic, Armenian,...

  15. Fragile isthmus under pressure. Central America.

    Science.gov (United States)

    Ypsilantis, J

    1992-01-01

    In Costa Rica the 1300 hectares of rainforest that comprise La Selva Biological Station support more than 1.5 times the number of plant and animal species found in California. In Central America over 2/3 of all deforestation has occurred since 1950, and closed canopy forest has shrunk dramatically during the past 40 years. The population in Central America, plus Mexico, grew by around 28% during the period 1977-87. At the same time the surface of forests and woodlands decreased by 13%, to 26% of the total land area. Croplands grew by 4% during these 10 years, to 13% of the total land area, and pastures by 2% to 37%; and unproductive lands grew by 14% to 24% of total land area. 50% of land is seriously eroded or degraded in El Salvador and over 30% in Guatemala. Central America's population was 22 million in 1980, 29 million in 1990, and it is anticipated to reach 63 million by 2025. Central America's urban population reached 46% in the 1990s: over 13 million with continuing increases in the next few decades. The growing population's need for fuelwood and the demand for agricultural land pose the main threat to forests in the coming decades. Close to 90% of the energy used by households comes from fuelwood. In the Telire reserve in Costa Rica 366 Cabecars are not yet an environmental threat for the forest. The Peten area in Guatemala is inhabited by around 300,000 people whose destructive slash and burn practices pose a serious threat to the environment which is exacerbated by a high population growth rate of 5.5% a year. PMID:12317701

  16. Financial inclusion - issues for central banks

    OpenAIRE

    Aaron Mehrotra; James Yetman

    2015-01-01

    Financial inclusion - access to financial services - is increasing worldwide, often with official support. This special feature discusses the implications for central banks. Greater financial inclusion changes the behaviour of firms and consumers in ways that could influence the effectiveness of monetary policy. The impact on financial stability may depend on how any improvements in financial access are achieved. Risks may rise if greater financial inclusion results from rapid credit growth, ...

  17. Lagrange, central norms, and quadratic Diophantine equations

    OpenAIRE

    R. A. Mollin

    2005-01-01

    We consider the Diophantine equation of the form x2−Dy2=c, where c=±1,±2, and provide a generalization of results of Lagrange with elementary proofs using only basic properties of simple continued fractions. As a consequence, we achieve a completely general, simple, and elegant criterion for the central norm to be 2 in the simple continued fraction expansion of D.

  18. Lagrange, central norms, and quadratic Diophantine equations

    Directory of Open Access Journals (Sweden)

    R. A. Mollin

    2005-01-01

    Full Text Available We consider the Diophantine equation of the form x2−Dy2=c, where c=±1,±2, and provide a generalization of results of Lagrange with elementary proofs using only basic properties of simple continued fractions. As a consequence, we achieve a completely general, simple, and elegant criterion for the central norm to be 2 in the simple continued fraction expansion of D.

  19. Central limit theorem and deformed exponentials

    International Nuclear Information System (INIS)

    The central limit theorem (CLT) can be ranked among the most important ones in probability theory and statistics and plays an essential role in several basic and applied disciplines, notably in statistical thermodynamics. We show that there exists a natural extension of the CLT from exponentials to so-called deformed exponentials (also denoted as q-Gaussians). Our proposal applies exactly in the usual conditions in which the classical CLT is used. (fast track communication)

  20. Strategy as Central and Peripheral Processes

    OpenAIRE

    Juul Andersen, Torben; Fredens, Kjeld

    2012-01-01

    Corporate entrepreneurship is deemed essential to uncover opportunities that shape the future strategic path and adapt the firm to environmental change (e.g., Covin and Miles, 1999; Wolcott and Lippitz, 2007). At the same time, rational central processes are important to execute strategic actions in a coordinated manner (e.g., Baum and Wally, 2003; Brews and Hunt, 1999; Goll and Rasheed, 1997). That is, the organization’s adaptive responses and dynamic capabilities are embedded...

  1. Legume Diversity Patterns in West Central Africa

    OpenAIRE

    Estrella, de la, M.; M. A. Mateo; Wieringa, J. J.; Mackinder, B.; Munoz, J

    2012-01-01

    Objectives - Species Distribution Models (SDMs) are used to produce predictions of potential Leguminosae diversity in West Central Africa. Those predictions are evaluated subsequently using expert opinion. The established methodology of combining all SDMs is refined to assess species diversity within five defined vegetation types. Potential species diversity is thus predicted for each vegetation type respectively. The primary aim of the new methodology is to define, in more detail, areas of s...

  2. Tectonomagmatic Associations on the Central Andean Plateau

    Science.gov (United States)

    de Silva, S. L.; Viramonte, J. G.

    2012-12-01

    The Neogene evolution of the Central Andes is characterized by a strong association between plate convergence, mountain building and plateau formation, and magmatism. Plateau uplift by crustal shortening and thickening in the lower crust is broadly coincident with large scale silicic magmatism defined by the Neogene Central Andean ignimbrite province. Of particular interest here are the spatiotemporal correlations between silicic magmatism and tectonic evolution of the Altiplano-Puna plateau. Although magmatism is driven by the subduction-related flux from mantle to crust, the shift to "crustal" magmatism as indicated by elevated crustal isotopic indices after ~10Ma suggests a link between crustal thickening, plateau formation and silicic magmatism. In particular, elevated geotherms associated with crustal thickening and enhanced mantle flux associated with lithospheric delamination may have played a role in thermally preparing the Central Andean crust for enhanced silicic magma production during the extensive Neogene ignimbrite flare-up. Emplacement of these magmas in the upper crust throughout the Neogene may have fuelled a period of significant interaction between magmatism and tectonism on the plateau. With particular reference to the 21° to 24°S segment of the Central Andes, spatial and structural coincidence of calderas of the Altiplano Puna Volcanic Complex with the NW-SE striking Calama-Olacapata-El Toro fault zone suggests significant tectonomagmatic interaction. Location of calderas suggest that these regional faults focused magma intrusion and storage, while spatially and temporally correlated eruption pulses connote a tectonic control. Indeed, current thermomechanical models of magma chamber development and eruption triggering promote a role for external triggering of "perched" upper crustal magma chambers. This might have been achieved by melt-enhanced deformation, or alternatively, significant uplift (~1km) associated with the development of large

  3. Acetaminophen prevents hyperalgesia in central pain cascade

    OpenAIRE

    Crawley, Brianna; Saito, Osamu; Malkmus, Shelle; Fitzsimmons, Bethany; Hua, Xiao-Ying; Yaksh, Tony L.

    2008-01-01

    Acetaminophen is an analgesic and antipyretic drug believed to exert its effect through interruption of nociceptive processing. In order to determine whether this effect is due to peripheral or central activity, we studied the efficacy of systemic (oral) and intrathecal (IT) application of acetaminophen in preventing the development of hyperalgesia induced through the direct activation of pro-algogenic spinal receptors. Spinal administration of substance P (SP, 30 nmol, IT) in rats produced a...

  4. Nucleotide Manipulatives to Illustrate the Central Dogma

    Directory of Open Access Journals (Sweden)

    Sonja B. Yung

    2015-08-01

    Full Text Available The central dogma is a core concept that is critical for introductory biology and microbiology students to master. However, students often struggle to conceptualize the processes involved, and fail to move beyond simply memorizing the basic facts. To encourage critical thinking, we have designed a set of magnetic nucleotide manipulatives that allow students to model DNA structure, along with the processes of replication, transcription, and translation.

  5. Nucleotide Manipulatives to Illustrate the Central Dogma†

    OpenAIRE

    Sonja B. Yung; Todd P. Primm

    2015-01-01

    The central dogma is a core concept that is critical for introductory biology and microbiology students to master. However, students often struggle to conceptualize the processes involved, and fail to move beyond simply memorizing the basic facts. To encourage critical thinking, we have designed a set of magnetic nucleotide manipulatives that allow students to model DNA structure, along with the processes of replication, transcription, and translation.

  6. Dry needling — peripheral and central considerations

    OpenAIRE

    Dommerholt, Jan

    2011-01-01

    Dry needling is a common treatment technique in orthopedic manual physical therapy. Although various dry needling approaches exist, the more common and best supported approach targets myofascial trigger points. This article aims to place trigger point dry needling within the context of pain sciences. From a pain science perspective, trigger points are constant sources of peripheral nociceptive input leading to peripheral and central sensitization. Dry needling cannot only reverse some aspects...

  7. Central Serous Chorioretinopathy Mistaken for Tuberculous Choroiditis

    OpenAIRE

    Marina Papadia; Herbort, Carl P.

    2011-01-01

    Purpose: To report a patient erroneously diagnosed with tuberculous choroiditis who was accordingly treated with long term steroids which in turn, worsened the actual disease process that turned out to be central serous chorioretinopathy (CSC). Case Report: A 59-year-old Caucasian man developed a chorioretinal disease in his right eye in 1997. Having a positive tuberculin skin test, tuberculous chorioretinitis was suspected and antituberculous therapy was administered for 4 months. In 200...

  8. Morphometric variation among the Central Indian populations

    OpenAIRE

    Gautam, Rajesh K.; Dipak K. Adak,; Pal, M.; P. Bharati

    2013-01-01

    Data on 8 anthropometric characters of 6663 adult males belonging to 22 caste groups, distributed in 38 districts of Central India were taken for present investigation, to study the morphometric variation. Cephalic index, nasal Index, Generalized Mahalanobis distances and its size and shape components were computed and dendrograms were drawn. Comparison of coefficient of variations shows that there exists variation in nasal breadth, nasal length, weight and hence in nasal index. But no marked...

  9. Geochemical drainage survey of central Argyll, Scotland

    OpenAIRE

    Coats, J.S.; Tandy, B.C.; Michie, U.McL

    1982-01-01

    A reconnaissance geochemical drainage survey of 720 km2 of Dalradian outcrop in central Argyll identified base-metal anomalies in the Pyrite Zone, Ardrishaig Phyllites, Loch Tay Limestone and the Green Beds. Faulting and igneous intrusion modified the distribution of metal content within these formations. In the results of the reconnaissance survey, copper reached maxima of 170 ppm and 1454 ppm in stream sediments and panned concentrates respectively; lead 1050 ppm ...

  10. Sensitivity Analysis of Centralized Dynamic Cell Selection

    DEFF Research Database (Denmark)

    Lopez, Victor Fernandez; Alvarez, Beatriz Soret; Pedersen, Klaus I.;

    2016-01-01

    mechanism and solutions involving cell switching in general. Simulation results show that such solutions can greatly benefit from the use of receivers with interference suppression capabilities and a larger number of antennas, with a maximum data rate gain of 120%. High performance gains are observed with...... two different traffic models, and it is not necessary to be able to connect to a large number of cells in order to reap most of the benefits of the centralized dynamic cell selection....

  11. Central serous chorioretinopathy: a pathogenetic model

    OpenAIRE

    et al; Manuela Imparato; Filippo Romanazzi; Antonio Caccavale

    2011-01-01

    Antonio Caccavale1, Filippo Romanazzi1, Manuela Imparato1, Angelo Negri2, Anna Morano3, Fabio Ferentini21Department of Ophthalmology, Neuropthalmology and Ocular Immunology Service, 2Department of Ophthalmology, Hospital “C. Cantù”, Abbiategrasso, Milan, Italy; 3University Eye Clinic, Foundation IRCCS San Matteo Hospital, Pavia, ItalyAbstract: Despite numerous studies describing predominantly its demography and clinical course, many aspects of central serous cho...

  12. Central Planning and Monetarism: Fellow Travelers?

    OpenAIRE

    Richard Portes

    1981-01-01

    We discuss the monetary institutions and macroeconomics of centrally planned economies (CPEs) ; objectives and techniques of monetary control; the relevance to CPEs of the neutrality property, the natural rate hypothesis, and the quantity theory; the roles of stock .and flow variables and the stability of asset demand and expenditure functions; the relation between monetary policy, fiscal policy and incomes policy in CPEs; the CPE equivalent of a floating exchange rate and its implications fo...

  13. A Quaternary fault database for central Asia

    Science.gov (United States)

    Mohadjer, Solmaz; Ehlers, Todd Alan; Bendick, Rebecca; Stübner, Konstanze; Strube, Timo

    2016-02-01

    Earthquakes represent the highest risk in terms of potential loss of lives and economic damage for central Asian countries. Knowledge of fault location and behavior is essential in calculating and mapping seismic hazard. Previous efforts in compiling fault information for central Asia have generated a large amount of data that are published in limited-access journals with no digital maps publicly available, or are limited in their description of important fault parameters such as slip rates. This study builds on previous work by improving access to fault information through a web-based interactive map and an online database with search capabilities that allow users to organize data by different fields. The data presented in this compilation include fault location, its geographic, seismic, and structural characteristics, short descriptions, narrative comments, and references to peer-reviewed publications. The interactive map displays 1196 fault traces and 34 000 earthquake locations on a shaded-relief map. The online database contains attributes for 123 faults mentioned in the literature, with Quaternary and geodetic slip rates reported for 38 and 26 faults respectively, and earthquake history reported for 39 faults. All data are accessible for viewing and download via http://www.geo.uni-tuebingen.de/faults/. This work has implications for seismic hazard studies in central Asia as it summarizes important fault parameters, and can reduce earthquake risk by enhancing public access to information. It also allows scientists and hazard assessment teams to identify structures and regions where data gaps exist and future investigations are needed.

  14. Embedding Orders Into Central Simple Algebras

    CERN Document Server

    Linowitz, Benjamin

    2010-01-01

    The question of embedding fields into central simple algebras $B$ over a number field $K$ was the realm of class field theory. The subject of embedding orders contained in the ring of integers of maximal subfields $L$ of such an algebra into orders in that algebra is more nuanced. The first such result along those lines is an elegant result of Chevalley \\cite{Chevalley-book} which says that with $B = M_n(K)$ the ratio of the number of isomorphism classes of maximal orders in $B$ into which the ring of integers of $L$ can be embedded (to the total number of classes) is $[L \\cap \\widetilde K : K]^{-1}$ where $\\widetilde K$ is the Hilbert class field of $K$. Chinburg and Friedman (\\cite{Chinburg-Friedman}) consider arbitrary quadratic orders in quaternion algebras satisfying the Eichler condition, and Arenas-Carmona \\cite{Arenas-Carmona} considers embeddings of the ring of integers into maximal orders in a broad class of higher rank central simple algebras. In this paper, we consider central simple algebras of d...

  15. The Centralizer on H- Separable Smash Products

    Institute of Scientific and Technical Information of China (English)

    祝家贵

    2002-01-01

    Let H be a finite dimensional Hopf algebra over a field and A an H-module algebra. The H induces an action on the CA#H(A) by adjoint and CA#H(A)H= Z(A # H) = C,where CA#H(A) denotes the centralizer which algebra A in A # H and Z(A # H) the center of A # H.The aim of this paper is to discuss ,the Galois conditions on the centralizer CA# H(A).We prove that CA# H(A)/ZA # H is H* -Galois if and only if CA# H(A)# H/CA# H(A) is H-separable). Furthermore , if H is a finite dimensional semisimple Hopf algebra and CA# H(A)# H is an Azumaya C-algebra or A # H/A is H-separable, CA# H(A) satisfies the double centralizer property in CA# H(A)# H, CA# H(A)/C is separable and there exists a cocommutative left integral t ∈∫1H,then CA# H(A)/C is H*-Galois.

  16. Visibility of the central canal on MRI

    Energy Technology Data Exchange (ETDEWEB)

    Petit-Lacour, M.C.; Lasjaunias, P.; Iffenecker, C.; Benoudiba, F.; Hadj Rabia, M.; Doyon, D. [Service de Neuroradiologie, Faculte de Paris Sud (France); Hurth, M. [Department of Neurosurgery, Faculte Paris Sud, Kremlin-Bicetre (France)

    2000-10-01

    The central canal of the spinal cord is present at birth and becomes progressively obliterated. Cadaver studies have shown that it may persiste partially or completely. To our knowledge, this entity has not been described on MRI. We reviewed 794 MRI studies of the spinal cord, and found 12 patients (aged 14 to 65 years) who had an intramedullary cavity. The cavity was at the junction of the ventral {sup 1}/{sub 3} and dorsal {sup 2}/{sub 3} of the spinal cord, except at the level of the lumbar enlargement, where it was central. It was filiform in most cases, although sometimes fusiform (3 to 4 mm in diameter), and had regular contours. The cavity were thoracic in 69 % of cases. The clinical features were totally unrelated to the image, and there were no anatomical factors (Chiari malformation, dysraphism) predisposing to syringomyelia. The images were perfectly compatible with a persistent central canal, which we interpret as a variant of normal anatomy. Therefore it is important to regard these findings as normal, to avoid unnecessary treatment and follow-up. (orig.)

  17. Fibromyalgia: the prototypical central sensitivity syndrome.

    Science.gov (United States)

    Boomershine, Chad S

    2015-01-01

    Fibromyalgia syndrome (FM), the most common central sensitivity syndrome (CSS) affecting over 5% of the population, is a disorder of chronic widespread pain accompanied by numerous other symptoms that causes significant functional impairment. The core FM symptom domains can be recalled using the FIBRO mnemonic and include Fatigue and Fog (cognitive dysfunction), Insomnia (difficulties with all aspects of sleep including initiation, maintenance and restorative), Blues (depression and anxiety), Rigidity (stiffness in muscles and joints) and Ow! (widespread pain and tenderness). While typically presenting in middle-aged women, FM can affect both sexes at any age. FM is a syndrome of abnormal central pain processing and increased central sensitivity caused by neurobiological changes that cause dysregulation of mechanisms that normally regulate pain sensation. There are currently three different methods for diagnosing FM; the 1990, 2010 and modified 2010 American College of Rheumatology (ACR) criteria. While disabling, FM symptoms can be managed with a regimen of pharmacologic and nonpharmacologic treatments. Medication types with benefit in treating FM include anticonvulsants, antidepressants, anti-inflammatories, muscle relaxers, tramadol, and stimulants. Beneficial nonpharmacologic therapies include aerobic and resistance exercise, stretching, cognitive behavioral therapy, and education. Effective management requires formulation of an individualized regimen since patients differ widely in symptoms and treatments they find beneficial. Such an individualized regimen should be based on a systematic assessment of problematic symptoms conducted at baseline and each follow-up with treatments modified over time. While challenging, FM symptoms can be effectively managed and patients can lead full, productive lives. PMID:26088213

  18. LANDSAT imagery of the Central Andes

    Science.gov (United States)

    Komer, C. A.; Morgan, P.

    1986-01-01

    The central Andes of South America extend from approximately 14 deg. S to 28 deg. S as an unbroken chain of mountains and volcanoes over 2000 km long. It is here that the Nazca plate dives under the South American plate at angles varying from 10 deg to 30 deg. Very little is known about the volcanoes comprising this classic, subduction-type plate margin. A catalogue of the volcanoes in the central Andes is being prepared by Dr. P.W. Francis and Dr. C.A. Wood at the NASA Lunar and Planetary Institute. At present, more than 800 volcanoes of Cenozoic age have been recognized in the chain, with an estimated 75-80 major, active Quarternary volcanoes. Approximately one hundred 1536 x 1536 pixel color composite Optronics positives were produced from six full LANDSAT Thermatic Mapper scenes and three partial TM scenes. These positives cover a large portion of the central Andes. The positives were produced from LANDSAT data using the VAX imaging package, LIPS. The scenes were first transferred from magnetic tape to disk. The LIPS package was then used to select volcanically interesting areas which were then electronically enhanced. Finally, the selected areas were transferred back to tape and printed on the Optronics equipment. The pictures are color composites using LANDSAT TM bands 7,4, and 2 in the red, green, and blue filters, respectively.

  19. Recent landscape change in California's Central Valley

    Science.gov (United States)

    Soulard, C. E.; Wilson, T. S.

    2012-12-01

    Long term monitoring of land use and land cover in California's intensively farmed Central Valley reveals several key physical and socioeconomic factors driving landscape change. As part of the USGS Land Cover Trends Project, we analyzed modern land-use/land-cover change for the California Central Valley ecoregion between 2000 and 2010, monitoring annual change between 2005 and 2010, while creating two new change intervals (2000-2005 and 2005-2010) to update the existing 27-year, interval-based analysis. Between 2000 and 2010, agricultural lands fluctuated due to changes in water allocations and emerging drought conditions, or were lost permanently to development (240 square km). Land-use pressure from agriculture and development also led to a decline in grasslands and shrublands across the region (280 square km). Overall, 400 square km of new developed lands were added in the first decade of the 21st century. From 2007 to 2010, development only expanded by 50 square km, coinciding with defaults in the banking system, the onset of historic foreclosure crisis in California and the global economic downturn. Our annual LULC change estimates capture landscape-level change in response to regional policy changes, climate, and fluctuations (e.g., growth or decline) in the national and global economy. The resulting change data provide insights into the drivers of landscape change in the California Central Valley and the combination of two consistent mapping efforts represents the first continuous, 37-year endeavor of its kind.

  20. The ATLAS Level-1 Central Trigger

    International Nuclear Information System (INIS)

    The ATLAS Level-1 trigger system is responsible for reducing the anticipated LHC collision rate from 40 MHz to less than 100 kHz. This Level-1 selection counts jet, tau/hadron, electron/photon and muon candidates, with additional triggers for missing and total energy. The results are used by the Level-1 Central Trigger to form a Level-1 Accept decision. This decision, along with timing signals, is sent to the sub-detectors from the Level-1 Central trigger, while summary information is passed into the higher levels of the trigger system. The performance of the Central Trigger during the first collisions will be shown. This includes details of how the trigger information, along with dead-time rates, are monitored and logged by the online system for physics analysis, data quality assurance and operational debugging. Also presented are the software tools used to efficiently display the relevant information in the control room in a way useful for shifters and experts.

  1. Is Centrality the Key to High Performance?

    Directory of Open Access Journals (Sweden)

    Eckenhofer Eva Maria

    2010-12-01

    Full Text Available Social Capital, the outcome for individuals from networks with shared norms and values, has already been discussed as a driver for innovation and performance improvement. Social Capital is a resource embedded in social structures, which can be accessed as well as mobilized in purposeful actions. There are various theories about social resources and structures leading to discussions on whether network closure or the absence of ties is the key to the success of Social Capital. Nevertheless, little is known about the relationship between network centrality and Social Capital. Therefore, this paper aims at contributing to the discussion by analyzing, using a case study, the structural position of actors who are rich in Social Capital. The study also assesses if the actors who are central in the social network are the ones with the highest performance. This study was based on a survey of 170 students from a Czech University, who form three different networks. For the detection of Social Capital, a procedure developed and tested in the European Values Study Surveys was applied. The relational data was analyzed using UCINET and illustrated with the use of VISONE. The outcomes suggest that there is a connection between the centrality of an actor and their performance, not only in terms of average grade but also Social Capital. Furthermore, the data analysis shows that the number of languages an actor speaks as well as experiences in foreign countries impacts on their performance and location within a network.

  2. The ATLAS level-1 Central Trigger

    CERN Document Server

    Spiwoks, R; Berge, D; Caracinha, D; Ellis, Nick; Farthouat, P; Gällnö, P; Haas, S; Klofver, P; Krasznahorkay, A; Messina, A; Ohm, C; Pauly, T; Perantoni, M; Pessoa Lima Junior, H; Schuler, G; De Seixas, J M; Wengler, T; PH-EP

    2007-01-01

    The ATLAS Level-1 Central Trigger consists of the Muon-to-Central-Trigger-Processor Interface (MUCTPI), the Central Trigger Processor (CTP), and the Timing, Trigger and Control (TTC) partitions of the sub-detectors. The MUCTPI connects the output of the muon trigger system to the CTP. At every bunch crossing it receives information on muon candidates from each of the 208 muon trigger sectors and calculates the total multiplicity for each of six pT thresholds. The CTP combines information from the calorimeter trigger and the MUCTPI and makes the final Level-1 Accept (L1A) decision on the basis of lists of selection criteria (trigger menus). The MUCTPI and the CTP provide trigger summary information to the Level-2 trigger and to the data acquisition (DAQ) for every event selected at the Level-1. They further provide accumulated and, for the CTP, bunch-by-bunch counter data for monitoring of the trigger, detector and beam conditions. The TTC partitions send timing, trigger and control signals from the CTP to the...

  3. Nuclear energy options for Central Asia

    International Nuclear Information System (INIS)

    Full text: The five countries of Central Asia have a strong basis for the development of commercial nuclear energy. Several test reactors have operated within the region, including the Ak tau BN350 - a very advanced fast breeder reactor combined with a large water desalination plant. The Central Asian countries have a large cadre of well-trained nuclear scientists and engineers who could operate and maintain nuclear power plants and expanded nuclear fuel infrastructure as they evolve. The Central Asia region experiences significant demand for base-load energy in major population centers and industrial development areas. A well-developed electricity transmission grid could transmit nuclear-generated electricity from the power stations to the load centers. Finally, given the large land area and the relatively small population (in relation to the size of the region) there exist many remote and stable sites where nuclear generation centers can be sited and connected to the transmission grid. A good example is the Semipalatinsk Nuclear Test Site (STS) whose vast area could easily contain several nuclear power plants, which would be cooled by the water flow of the Irtish River. The Kazakhstan authorities have already identified several potential nuclear power plant sites within the national transmission system, the STS being one such prospective site. The large-scale availability of uranium in the region affords the uranium exporting countries - particularly Kazakhstan and Uzbekistan - significant leverage with international nuclear reactor vendors in establishing the terms for nuclear plant imports into the region. Such leverage could further be increased if multiple reactor orders are submitted, for instance by two or more countries ordering similar types of plants to be installed at various sites in their territories. The added value of the uranium exports from Central Asia does not have to be measured only in terms of supporting the development of fuel cycle

  4. Plants and the central nervous system.

    Science.gov (United States)

    Carlini, E A

    2003-06-01

    This review article draws the attention to the many species of plants possessing activity on the central nervous system (CNS). In fact, they cover the whole spectrum of central activity such as psychoanaleptic, psycholeptic and psychodysleptic effects, and several of these plants are currently used in therapeutics to treat human ailments. Among the psychoanaleptic (stimulant) plants, those utilized by human beings to reduce body weight [Ephedra spp. (Ma Huang), Paullinia spp. (guaraná), Catha edulis Forssk. (khat)] and plants used to improve general health conditions (plant adaptogens) were scrutinized. Many species of hallucinogenic (psychodysleptic) plants are used by humans throughout the world to achieve states of mind distortions; among those, a few have been used for therapeutic purposes, such as Cannabis sativa L., Tabernanthe iboga Baill. and the mixture of Psychotria viridis Ruiz and Pav. and Banisteriopsis caapi (Spruce ex Griseb.) C.V. Morton. Plants showing central psycholeptic activities, such as analgesic or anxiolytic actions (Passiflora incarnata L., Valeriana spp. and Piper methysticum G. Forst.), were also analysed.Finally, the use of crude or semipurified extracts of such plants instead of the active substances seemingly responsible for their therapeutic effect is discussed. PMID:12895668

  5. Temporal node centrality in complex networks

    Science.gov (United States)

    Kim, Hyoungshick; Anderson, Ross

    2012-02-01

    Many networks are dynamic in that their topology changes rapidly—on the same time scale as the communications of interest between network nodes. Examples are the human contact networks involved in the transmission of disease, ad hoc radio networks between moving vehicles, and the transactions between principals in a market. While we have good models of static networks, so far these have been lacking for the dynamic case. In this paper we present a simple but powerful model, the time-ordered graph, which reduces a dynamic network to a static network with directed flows. This enables us to extend network properties such as vertex degree, closeness, and betweenness centrality metrics in a very natural way to the dynamic case. We then demonstrate how our model applies to a number of interesting edge cases, such as where the network connectivity depends on a small number of highly mobile vertices or edges, and show that our centrality definition allows us to track the evolution of connectivity. Finally we apply our model and techniques to two real-world dynamic graphs of human contact networks and then discuss the implication of temporal centrality metrics in the real world.

  6. Peritoneal dissemination from central neurocytoma: case report

    Directory of Open Access Journals (Sweden)

    Coelho Neto Maurício

    2003-01-01

    Full Text Available OBJECTIVE: central neurocytoma is a low grade tumor of neuroglial origin and a relatively new histological entity. Only a few cases have been reported and its biological behavior is still uncertain. Some cases have shown an aggressive behavior (local recurrence, malignant dedifferentiation or CSF dissemination and challenged the initial view of its relative benignity. A case of central neurocytoma with peritoneal dissemination is presented. CASE: a six years-old boy with recurrent neurocytoma of III ventricle and left thalamus showed fast growth of tumor rest and ascites three and a half years after subtotal removal of the lesion. Tumor cells were identified in the ascitic fluid and implanted in the peritoneum. Chemotherapy was initiated immediately after diagnosis of peritoneal dissemination (etoposide, carboplatin, doxorubicin and cyclophosphamide. The patient developed metabolic imbalance and respiratory failure due to rapid formation of ascitic fluid and died 3 days after the diagnosis of peritoneal dissemination was established. CONCLUSION: central neurocytoma is a low grade tumor with low values of the proliferative index in the majority of cases. In spite of that, some tumors may present a very aggressive behavior and extraneural dissemination. Evaluation of proliferative index may be a guideline parameter for planning adjuvant therapies after surgical treatment in selected cases. Extraneural dissemination may occur in some cases specially in patients with ventriculoperitoneal shunt.

  7. a New Central American Seismic Zonation

    Science.gov (United States)

    Camacho, E.; Rojas, W.; Alvarado-Induni, G.; Marroquin, G.; Molina, E.; Talavera, E.; Climent, A.; Benito, B.

    2013-05-01

    A new zonation for Central America is proposed, aimed at providing an input for regional seismic hazard studies. The zonation combined different kind of data: the seismotectonic model, a new an extensive earthquake catalog homogenized to a moment magnitude scale (Mw), focal mechanisms, geomorphologic features, GPS observations and other useful evidences for defining seismic sources. After a careful analysis of the seismicity and tectonics in the study area, the seismogenic zones have been identified, following the usual criteria assumed in probabilistic seismic hazard assessment (PSHA) based in zoning models: seismic activity modelled by a Poisson process and similar patterns of faulting, seismicity, and rupture mechanism inside each zone. The tectonic environment has required taking into account zones in three particular regimes: crustal faulting, subduction interplate and subduction intraplate (inslab). Therefore, three models including zones with different depths have been defined, each model being associated with the seismicity in a particular range: h 60 km for intraplate (inslab). The three models have been proposed for the whole of Central America, and also including zonations at the national level; i.e each country with their own zones based in the knowledge of the local faults and seismicity. A consensus was reached among the researchers to have country detailed zonations, but avoiding discontinuities at the national boundaries. This is the first zonation model for the whole Central America region which also includes detail zonation at the national level. This new zonation allows the generation of seismic hazard maps using a more homogeneous criteria.

  8. Central Asian Gypsies: identities and migrations

    Directory of Open Access Journals (Sweden)

    Elena Marushiakova

    2015-12-01

    Full Text Available Central Asian Gypsies: identities and migrationsDuring recent years the topic of Gypsy/Roma migration and identities became burning topic of pan-EUropean public discourse. Much less attention is paid to the Gypsy migrations outside the borders of European Union. The present article has ambitious goal to fulfill this gap and to present contemporary Gypsy migrations in Post-soviet Central Asian in order to see how this “burning” topic looks outside European space. After breakdown of Soviet Union and establishing of new independent republics in Central Asia and in connection to economical difficulties, wars and social unrest, in order to make their living, the communities of Central Asian ‘Gypsies’ revitalised their former nomadic traditions and migrate towards Russian Federation and in frames of Central Asia towards Kazakhstan. There they are earning their living through begging and sporadic work in construction and scrap collection.A central point of this article is the impact of these contemporary migrations on the development of identities and well being of Central Asian ‘Gypsies’. The multilevel, hierarchically structured identities of Central-Asian ‘Gypsies' are analysed as demonstrated in different historical contexts – as former “Soviet people”, member of former ruling class of agricultural proletariat, and as declassed community today; as Central-Asian ‘Gypsies’ or as citizens of respective Central Asian Republics during migrations in Russian Federation in front of Russian majority society and in front of Roma; and in context of the Central Asian region during the migrations to Kazakhstan and in their home countries.   Cyganie środkowoazjatyccy – tożsamości i migracje W ostatnich latach tematyka migracji i tożsamości Cyganów (Romów stała się tematem palącym w unijnoeuropejskim dyskursie publicznym. O wiele mniej uwagi poświęca się w nim migracjom Cyganów, które mają miejsce poza granicami Unii

  9. Measured compaction for 24 extensometers in the Central Valley

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital dataset contains the compaction data for 24 extensometers used for observations in the Central Valley Hydrologic Model (CVHM). The Central Valley...

  10. Distributed generation and centralized power system in Thailand

    DEFF Research Database (Denmark)

    Sukkumnoed, Decharut

    The paper examines and discusses conflicts between the development of distributed power and centralized power system in Thailand.......The paper examines and discusses conflicts between the development of distributed power and centralized power system in Thailand....

  11. Vasculitis Syndromes of the Central and Peripheral Nervous Systems

    Science.gov (United States)

    ... About NINDS Vasculitis Syndromes of the Central and Peripheral Nervous Systems Fact Sheet See a list of all NINDS ... 496-5717 "Vasculitis Syndromes of the Central and Peripheral Nervous Systems Fact Sheet", NINDS, Publication date July 2011. NIH ...

  12. Evapotranspiration Input Data for the Central Valley Hydrologic Model (CVHM)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital dataset contains monthly reference evapotranspiration (ETo) data for the Central Valley Hydrologic Model (CVHM). The Central Valley encompasses an...

  13. Theory of the central ion trajectory in the spiral inflector

    International Nuclear Information System (INIS)

    This paper presents the analytical and numerical theory of the central ion trajectory through the spiral inflector. Analytical expressions for the equations which describe the central ion trajectory are derived

  14. Central Asian gas in Eurasian power game

    International Nuclear Information System (INIS)

    Following the dissolution of the Soviet Union, various gas pipeline projects have been proposed to diversify transit routes and export markets of the landlocked Central Asian states. To evaluate the pipeline project's impact on the players' bargaining power, I apply the cooperate game theory to a quantitative model of the Eurasian gas trade and quantify the bargaining power structure via the Shapley value. Due to ample production capacities in Central Asia, I observe little strategic interaction between the West and China. Thus, demand competition with China is not necessarily a disadvantage for the West, and the Turkmenistan–China pipeline does not affect the impact of the westbound projects aiming Europe and Turkey. For Turkmenistan, i.e., the main supplier in the region, a link via the Caspian Sea to Turkey is the most beneficial westbound option. Although the projects carrying gas from Azerbaijan and Turkmenistan to Europe enjoy the European Commission's political support, they yield marginal benefits to the European consumers. Thanks to its transit position, Turkey collects a large share of the benefits in the East–West gas trade. - Highlights: • The Eurasian gas trade is represented as a cooperative game which is solved with the Shapley value. • There is no demand competition between the West and China for Central Asian gas. • For Turkmenistan the route via the Caspian Sea is the most beneficial westbound pipeline option. • Turkey emerges as a transit country and collects a large share of the benefits from the East–West gas trade. • A link to Europe yields marginal benefits to Turkmenistan and Europe

  15. Angiotensin II during experimentally simulated central hypovolemia

    Directory of Open Access Journals (Sweden)

    Theo Walther Jensen

    2016-03-01

    Full Text Available Abstract:Central hypovolemia, defined as diminished blood volume in the heart and pulmonary vascular bed, is still an unresolved problem from a therapeutic point of view. The development of pharmaceutical agents targeted at specific angiotensin II receptors, like the non-peptidergic AT2-receptor agonist compound 21, is yielding many opportunities to uncover more knowledge about angiotensin II receptor profiles and possible therapeutic use. Cardiovascular, anti-inflammatory and neuroprotective therapeutic use of compound 21 have been suggested. However, there has not yet been a focus on the use of these agents in a hypovolemic setting. We argue that the latest debates on the effect of angiotensin II during hypovolemia might guide for future studies investigating the effect of such agents during experimentally simulated central hypovolemia. The purpose of this review is to examine the role of angiotensin II during episodes of central hypovolemia.To examine this, we reviewed results from studies with three experimental models of simulated hypovolemia: head up tilt table test, lower body negative pressure, and hemorrhage of animals. A systemic literature search was made with the use of PubMed/MEDLINE for studies that measured variables of the renin-angiotensin system or its effect during simulated hypovolemia. 12 articles, using one of the three models, were included and showed a possible organ protective effect and an effect on the sympathetic system of angiotensin II during hypovolemia. The results support the possible organ protective vasodilatory role for the AT2-receptor during hypovolemia on both the kidney and the splanchnic tissue.

  16. The Case of NRENs in Central Asia

    Directory of Open Access Journals (Sweden)

    Robert Franciscus Janz

    2012-07-01

    Full Text Available National Research and Education Network organizations (NRENs provide advanced information and communication technology (ICT services for the academic community of their country. Their focus is often on providing affordable high speed bandwidth amongst their members and to other research networks, but NRENs also provide other advanced services such as electronic repositories, educational environments and supercomputing facilities. Higher Education and Research institutions have to play an active role in the transformation to the “Knowledge Society”. A recent (2010 report of the International Telecommunication Union has identified NRENs as important vehicles in reaching the goals of the World Summit of the Information Society. It is also demonstrated that the Central Asian countries score very low in the Networked Readiness Indices of the World Economic Forum, including areas where strong NRENs could improve the status quo. NRENs therefore have a role that is also important for the nation itself and therefore claims for government support are legitimate. About 62% of the countries of the world already have an NREN and there are four characteristics that are common to these NRENs. In nearly all of the cases the NREN is a not-for-profit organization that not only serves the academic community, but is also owned by the same community. Four out of five Central Asian countries have an active NREN and these NRENs all participate in the EC funded CAREN project that aims to set up a sustainable regional network for the academic communities in the participating countries. Today, the Central Asian Research and Education Network (CAREN is upgrading the ancient Silk Road to a 21st-century high-speed internet highway for research and educational institutions through the region. Operational since July 2010, CAREN currently interconnects scientists and students from Kazakhstan, Kyrgyzstan, Tajikistan, and Turkmenistan.

  17. La naturaleza artificial de Central Park

    OpenAIRE

    Martínez García-Posada, Ángel

    2009-01-01

    Central Park fue el primer gran parque público norteamericano, pionero en la adaptación de un modelo europeo según un lenguaje heredado del pintoresquismo y la jardinería inglesa, el resultado de una serie de transformaciones que intensificaban los efectos paisajistas: sobre la tierra había un paisaje diseñado y dibujado que copiaba a la naturaleza y bajo la tierra se disponía un eficiente sistema tecnológico. El parque reúne las cualidades de dos tipos de espacios libres en la ciudad: la ima...

  18. Regional geophysical investigations in central Colorado Plateau

    International Nuclear Information System (INIS)

    Gravity and aeromagnetic surveys covering about 15,000 square miles in the central Colorado Plateau in Utah, Colorado, Arizona, and New Mexico were conducted to assist in determining the regional subsurface geology as it may relate to uranium, oil, and potash exploration. The dominant gravity anomalies are conspicuous gravity lows over the salt anticlines. Both broad regional highs, which occur over the monoclinal uplifts where denser rocks are close to the surface, and regional lows, which occur over the basin and platform areas, are caused by lateral density contrasts related to structural relief. Most of the magnetic anomalies arise from contrasts in magnetization of the Precambrian basement

  19. Radionuclides at Descartes in the central highlands

    Science.gov (United States)

    Wrigley, R. C.

    1973-01-01

    Throium, uranium, potassium, aluminium-26, and sodium-22 were measured by nondestructive gamma ray spectrometry in six soil and two rock samples gathered by Apollo 16 in the lunar central highlands. The soil samples probably include both major geologic formations in the vicinity, the Cayley and Descartes Formations, although it is possible that the Descartes Formation is not represented. The rock samples have low concentrations of primordial radionuclides. The Al concentrations were lower than could be expected from the high abundance of alumina in the Apollo 16 soils reported earlier, but this could be due to lower concentrations of target elements in these soils, sampling depth variations, or regolithic mixing (exposure age variations).

  20. Effects of radiotherapy on central venous ports

    International Nuclear Information System (INIS)

    During radiotherapy of patients with implant able central venous ports we are often afraid of complications resulting from ports damage on the one hand and their interaction with surrounding tissues on the other hand. In experimental conditions venous ports were exposed to radiation. It was found that radiation reflected from a port is negligible and should not put patients at risk. Radiotherapy does not cause any changes within a port chamber, however it substantially affects elasticity of a polyurethane port catheter and to a minimal extent affects silicone catheter. (authors)

  1. Smoothed dynamics in the central field problem

    OpenAIRE

    Santoprete, Manuele; Stoica, Cristina

    2009-01-01

    Consider the motion of a material point of unit mass in a central field determined by a homogeneous potential of the form $(-1/r^{\\alpha})$, $\\alpha>0,$ where $r$ being the distance to the centre of the field. Due to the singularity at $r=0,$ in computer-based simulations, usually, the potential is replaced by a similar potential that is smooth, or at least continuous. In this paper, we compare the global flows given by the smoothed and non-smoothed potentials. It is shown that the two flows ...

  2. Sources of Economic Fluctuations in Central America

    Directory of Open Access Journals (Sweden)

    Wilfredo Toledo

    2014-06-01

    Full Text Available Using panel data from Central America, this paper studies the determining factors of inflation and aggregate output fluctuations by estimating two Structural Vector Autoregressive (SVAR models. Price and output variables are included in one of the models, whereas M2 and the price of oil are additional variables in the other one. Findings of this study suggest that price is determined by the demand, while output seems to be influenced mainly by the supply shocks in that area. It was also evidenced that the price of oil does not have a significant impact on the general price level in that region.

  3. Central waste complex interim safety basis

    International Nuclear Information System (INIS)

    This interim safety basis provides the necessary information to conclude that hazards at the Central Waste Complex are controlled and that current and planned activities at the CWC can be conducted safely. CWC is a multi-facility complex within the Solid Waste Management Complex that receives and stores most of the solid wastes generated and received at the Hanford Site. The solid wastes that will be handled at CWC include both currently stored and newly generated low-level waste, low-level mixed waste, contact-handled transuranic, and contact-handled TRU mixed waste

  4. Central waste complex interim safety basis

    Energy Technology Data Exchange (ETDEWEB)

    Cain, F.G.

    1995-05-15

    This interim safety basis provides the necessary information to conclude that hazards at the Central Waste Complex are controlled and that current and planned activities at the CWC can be conducted safely. CWC is a multi-facility complex within the Solid Waste Management Complex that receives and stores most of the solid wastes generated and received at the Hanford Site. The solid wastes that will be handled at CWC include both currently stored and newly generated low-level waste, low-level mixed waste, contact-handled transuranic, and contact-handled TRU mixed waste.

  5. Attitudes Concerning Wind Energy in Central Illinois

    OpenAIRE

    Theron, Sophie; Winter, J. Randy; David G. Loomis; Spaulding, Aslihan D.

    2011-01-01

    Energy consumption in the United Sates has been increasing and the cost of fossil fuels has been unstable in recent years. Expanding investment in renewable energy is one way to reduce the nation’s dependence on fossil fuels. However, the Not-In-My-Back- Yard (NIMBY) opposition and various concerns raised at public hearings may inhibit the expansion of wind energy in Illinois. This study aims to characterize the public beliefs and opinions toward wind energy in central Illinois.

  6. Seasonal Changes in Central England Temperatures

    DEFF Research Database (Denmark)

    Proietti, Tommaso; Hillebrand, Eric

    deterministic and stochastic trends, as well as seasonally varying autocorrelation and residual variances. The model can be summarized as containing a permanent and a transitory component, where global warming is captured in the permanent component, on which the seasons load differentially. The phase of the......The aim of this paper is to assess how climate change is reflected in the variation of the seasonal patterns of the monthly Central England Temperature time series between 1772 and 2013. In particular, we model changes in the amplitude and phase of the seasonal cycle. Starting from the seminal work...

  7. Central Waste Complex (CWC) Waste Analysis Plan

    International Nuclear Information System (INIS)

    The purpose of this waste analysis plan (WAP) is to document the waste acceptance process, sampling methodologies, analytical techniques, and overall processes that are undertaken for waste accepted for storage at the Central Waste Complex (CWC), which is located in the 200 West Area of the Hanford Facility, Richland, Washington. Because dangerous waste does not include the source, special nuclear, and by-product material components of mixed waste, radionuclides are not within the scope of this documentation. The information on radionuclides is provided only for general knowledge

  8. Starting up the Multilingual Central Repository

    OpenAIRE

    Atserias Batalla, Jordi; Rigau Claramunt, German; Villarejo Muñoz, Luis

    2003-01-01

    Este artículo presenta el diseño inicial del "Multilingual Central Repository". La primera versión del MCR integra, siguiendo en el marco de EuroWordNet, cinco wordnets locales (incluyendo tres versiones del WordNet de Princeton), la Top Ontology the EuroWordNet, los dominios de MultiWordNet y cientos de miles de nuevas relaciones semánticas y propiedades adquiridas automáticamente de corpus. De hecho, el MCR resultante constituye la más grande y rica base de conocimiento multilingüe nunca co...

  9. Central Limit Theorem for Nonlinear Hawkes Processes

    CERN Document Server

    Zhu, Lingjiong

    2012-01-01

    Hawkes process is a self-exciting point process with clustering effect whose jump rate depends on its entire past history. It has wide applications in neuroscience, finance and many other fields. Linear Hawkes process has an immigration-birth representation and can be computed more or less explicitly. It has been extensively studied in the past and the limit theorems are well understood. On the contrary, nonlinear Hawkes process lacks the immigration-birth representation and is much harder to analyze. In this paper, we obtain a functional central limit theorem for nonlinear Hawkes process.

  10. Performance evaluation of Central European companies

    Directory of Open Access Journals (Sweden)

    Petr Fiala

    2015-10-01

    Full Text Available The paper presents a modelling approach for performance comparison of Central European companies on three levels: country, industry, and company. The approach is based on Data Envelopment Analysis and Analytic Hierarchy Process. The proposed model consists of two basic sections. The first section estimates the importance of selected industries in the countries, whereas the second section evaluates the performance of companies within industries. The results of both sections are synthesized and finally the country performance is estimated. The evaluation is based on the data set resulting from a survey of companies from selected industries.

  11. The Central 3 kpc of NGC 5850

    CERN Document Server

    Bremer, M; Eckart, A; Zuther, J; Fischer, S; Valencias-S., M; Combes, F; Garcia-Burillo, S

    2013-01-01

    NGC 5850 is a nearby (z=0.0085) early type spiral galaxy classified as LINER. It is considered as a prototype double-barred system. Our optical Integral Field Spectroscopic (IFS) data of the central 21x19 arcsec^2 of NGC 5850 show extended LINER-like emission which we ascribe to the presence of a hot and evolved stellar population, possibly together with a faint AGN. Additionally NGC 5850 shows extended `composite' ionization patterns, likely to stem from a mixture of LINER-like ionization and photoionization by star formation. The kinematics of the gas deviates strongly from a simple rotational structure.

  12. Interferons in the central nervous system

    DEFF Research Database (Denmark)

    Owens, Trevor; Khorooshi, Reza M. H.; Wlodarczyk, Agnieszka;

    2014-01-01

    Interferons (IFNs) are implicated as an important component of the innate immune system influencing viral infections, inflammation, and immune surveillance. We review here the complex biological activity of IFNs in the central nervous system (CNS) and associated glial–immune interactions, with...... focus specifically on the Type I IFNs in physiological and pathological conditions. IFN-α and IFN-β are the predominant Type I IFNs in the CNS. They are produced in the CNS by glial cells, mostly microglia and astrocytes, as well as by neurons. A variety of mechanisms stimulate IFN production in glial...

  13. Central Nervous System Complications of Oncologic Therapy.

    Science.gov (United States)

    Hoeffner, Ellen G

    2016-08-01

    Traditional and newer agents used to treat cancer can cause significant toxicity to the central nervous system. MRI of the brain and spine is the imaging modality of choice for patients with cancer who develop neurologic symptoms. It is important to be aware of the agents that can cause neurotoxicity and their associated imaging findings so that patients are properly diagnosed and treated. In some instances conventional MRI may not be able to differentiate posttreatment effects from disease progression. In these instances advanced imaging techniques may be helpful, although further research is still needed. PMID:27444003

  14. D0 central tracking chamber performance studies

    International Nuclear Information System (INIS)

    The performance of the completed DO central tracking chamber was studied using cosmic rays at the State University of New York at Stony Brook. Also studied was a prototype tracking chamber identical in design to the completed DO tracking chamber. The prototype chamber was exposed to a collimated beam of 150 GeV pions at the Fermilab NWA test facility. Results indicate an RΦ tracking resolution compatible with the limitations imposed by physical considerations, excellent 2 track resolution, and a high track reconstruction efficiency along with a good rejection power against γ → e + e- events

  15. An air quality model for Central Mexico

    International Nuclear Information System (INIS)

    A computational air quality model for Central Mexico that includes the Basin of the Valley of Mexico, the Valleys of Toluca, Puebla and Cuernavaca already in experimental operation, is presented. The meteorology of the region is obtained combining two non-hydrostatic models: a model designed for synoptic scales called MM5 provides initial and boundary data to a model specially designed for urban environments and scales called MEMO. The transport model used numerical techniques developed by the authors that eliminate numerical diffusion and dispersion. For the photochemical model several ODE's integrators were tested. The emissions model developed uses the latest inventory data gathered in the region. (Author)

  16. D0 central tracking chamber performance studies

    Energy Technology Data Exchange (ETDEWEB)

    Pizzuto, D.

    1991-12-01

    The performance of the completed DO central tracking chamber was studied using cosmic rays at the State University of New York at Stony Brook. Also studied was a prototype tracking chamber identical in design to the completed DO tracking chamber. The prototype chamber was exposed to a collimated beam of 150 GeV pions at the Fermilab NWA test facility. Results indicate an R{Phi} tracking resolution compatible with the limitations imposed by physical considerations, excellent 2 track resolution, and a high track reconstruction efficiency along with a good rejection power against {gamma} {yields} e {sup +} e{sup {minus}} events.

  17. Vitamin D Status in Central Europe

    OpenAIRE

    Pawel Pludowski; Grant, William B; Harjit Pal Bhattoa; Milan Bayer; Vladyslav Povoroznyuk; Ema Rudenka; Heorhi Ramanau; Szabolcs Varbiro; Alena Rudenka; Elzbieta Karczmarewicz; Roman Lorenc; Justyna Czech-Kowalska; Jerzy Konstantynowicz

    2014-01-01

    Little published information is available regarding epidemiological data on vitamin D status in the large geographical region of Central Europe (CE). We searched the journal literature with regard to 25(OH)D concentrations among community-dwelling or healthy people living in CE. 25(OH)D concentrations varied by age, season, study sample size, and methodological approach [i.e., 25(OH)D assay used]. Concentrations of 25(OH)D in CE appeared lower than 30 ng/mL, and the magnitude of hypovitaminos...

  18. The trade off between central bank independence and conservativeness

    OpenAIRE

    Eijffinger, S.C.W.; Hoeberichts, M.M.

    1998-01-01

    This paper introduces a parameter for central bank independence in a monetary policy game with a conservative central banker.It tries to explain the optimal degree of central bank independence and conservativeness by four economic and political determinants, both theoretically and empirically.There appears to be a trade off between central bank independence and conservativeness.Then, by comparing the optimal degree of conservativeness and independence with the actual degree of independence, w...

  19. Investment Cooperation in Central Asia: Prospects and Challenges

    OpenAIRE

    Nawal K. Paswan

    2013-01-01

    Central Asia is becoming an increasingly attractive destination for foreign direct investment (FDI). Although a first wave of foreign investments targeted Central and Eastern Europe in the early 1990s, followed by a second one to South-east Europe in the early 2000s, FDI is now moving even further eastward towards Central Asia. The Central Asian countries are all relatively small landlocked economies and need to promote trade and investment which enable them to closely integrate into the inte...

  20. Colloquium on Central Asia; Colloque sur l'Asie centrale

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This colloquium on Azerbaijan was organized by the direction of international relations of the French Senate and the French center of foreign trade (CFCE). This document gathers the interventions of the participants and the debates with the audience following these interventions. The topics treated concern: - the present day political-economical situation of Central Asia countries (problem of borders, relations with Russia and China); - the economies of Central Asia countries: short term problems and medium-term perspectives; - the relations with the European Union (political, economical, trade and investments, perspectives); - the European energy stakes of Caspian sea (oil and gas reserves, development of hydrocarbon resources, exploitation and transport constraints, stakes for Europe and France); - TotalFinaElf company in Central Asia (Kazakhstan, Azerbaijan, enclavement problem); - the economical impacts of the TRACECA pathway (Transport Corridor Europe Caucasus Asia). (J.S.)