WorldWideScience

Sample records for remoto orbital como

  1. Red privada virtual como alternativa para el acceso remoto

    OpenAIRE

    2010-01-01

    La comunicación es esencial para la eficiencia organizacional, pero al efectuarse a grandes distancias, se presentan altos costos y se expone información vital. Debido a esto, se propone diseñar una Red Privada Virtual como alternativa para el acceso remoto en ambientes corporativos donde empleados, clientes y socios comerciales puedan intercambiar información de forma económica y segura. Para ello, se realizó una investigación no experimental,...

  2. plataforma cloud computing como infraestructura tecnológica para laboratorios virtuales, remotos y adaptativos

    Directory of Open Access Journals (Sweden)

    Frey Alfonso Santamaría Buitrago,

    2016-01-01

    RESUMO Hoje em dia, as instituições de ensino superior estão a desenvolver processo de ensino apoiado em campus virtual, em sala de aula e blended learning; bem como a internacionalização do ensino cria novos desafios, tais como: a criação de redes de investigação, espaços de trabalho compartilhados, laboratórios virtuais e remotos, entre outros; apostando em sistemas de produção, publicação e distribuição de conteúdos digitais educativos que permitem a partilha de conhecimentos e material educativo. Esta proposta pretende potenciar o desenvolvimento de ecossistemas experimentação acadêmicos abertos, reutilizáveis e interoperáveis, através da concepção de um quadro ea integração tecnológica orientada para a implementação de laboratórios virtuais operados e tele, com base em IMS Learning Tools Interoperability ® (LTI® padrão . Isso, combinado com a caracterização de um conjunto de métodos e tecnologias aplicáveis ao desenvolvimento de laboratórios operados virtuais e tele, identificando o seu âmbito e critérios técnicos, a fim de oferecer serviços de informática em ambientes acadêmicos através da Internet e que permite uma alta escalabilidade e flexibilidade na modificar o dimensionamento do serviço, pesquisa acadêmica e científica, apoiada em padrões abertos, arquiteturas, tecnologias, ferramentas e aplicativos.

  3. Validación de requisitos funcionales de un Laboratorio Virtual Remoto como apoyo al blended learning

    OpenAIRE

    Javier Gamo Aranda; Jirina Novakova; Antonio Medina Rivilla; Covadonga Rodrigo San Juan

    2015-01-01

    Esta investigación analiza los requisitos detectados entre estudiantes y profesores de enseñanzas científico-técnicas, sobre el diseño y funcionalidad de una futura plataforma web que implemente un Laboratorio Virtual Remoto (VRL). El VRL actualmente está en fase de diseño, y pretende servir como complemento a la enseñanza experimental en el laboratorio presencial, en las áreas de Óptica y Fotónica. A tal fin, se han diseñado dos cuestionarios (para profesores y estudiantes, respectivame...

  4. Validación de requisitos funcionales de un Laboratorio Virtual Remoto como apoyo al blended learning

    Directory of Open Access Journals (Sweden)

    Javier Gamo Aranda

    2015-01-01

    Full Text Available Esta investigación analiza los requisitos detectados entre estudiantes y profesores de enseñanzas científico-técnicas, sobre el diseño y funcionalidad de una futura plataforma web que implemente un Laboratorio Virtual Remoto (VRL. El VRL actualmente está en fase de diseño, y pretende servir como complemento a la enseñanza experimental en el laboratorio presencial, en las áreas de Óptica y Fotónica. A tal fin, se han diseñado dos cuestionarios (para profesores y estudiantes, respectivamente, con el fin de recabar las necesidades y expectativas de ambos colectivos, en el uso y contenidos de la plataforma virtual. Los cuestionarios se han editado en inglés y español , su contenido ha sido validado previamente por expertos nacionales e internacionales en ciencias, ingeniería y educación, y se han distribuido en línea entre estudiantes y profesores de universidades españolas y extranjeras. El trabajo detalla la estructura de los cuestionarios, la valoración de los expertos sobre su contenido, el análisis de fiabilidad realizado, los resultados obtenidos en la cumplimentación por profesores y estudiantes, y la discusión de dichos resultados, realizada con la ayuda de un grupo de expertos.

  5. Control remoto telefónico

    OpenAIRE

    Río Armenteros, Carlos

    2006-01-01

    Este documento contiene el diseño y la explicación teórica de un control remoto telefónico y un detector de presencia que se presenta como uno de los posibles circuitos eléctricos que podría poner en marcha este control remoto. También contiene el desarrollo práctico donde se explica la realización del montaje de los dos circuitos y toma de medidas en el laboratorio. A continuación se muestran diferentes tipos de control remoto existentes en el mercado y finalmente se presen...

  6. Laboratorios remotos: Análisis; características y su desarrollo como alternativa a la práctica en la Facultad de Ingeniería

    Directory of Open Access Journals (Sweden)

    Ronald Zamora Musa

    2010-01-01

    Full Text Available El artículo tiene como propósito presentar los fundamentos conceptuales y los resultados preliminares de la investigación científica tecnológica sobre Desarrollo de un Laboratorio Remoto (LR, donde se esbozan las principales características que deben poseer los laboratorios remotos y las variables que se deben tener en cuenta durante la creación de un proyecto de teleoperación con el fin de convertirlo en un verdadero escenario de prácticas para los estudiantes de Ingeniería. La práctica para la ingeniería se constituye como una prioridad en la formación de los ingenieros, si se tiene en cuenta que el campo ocupacional les exige contar con las competencias necesarias para resolver problemas reales donde el componente práctico juega un papel preponderante. En la actualidad las instituciones educativas cuentan con limitados equipos y laboratorios para las prácticas de sus estudiantes, teniendo que recurrir a los laboratorios remotos como alternativa para suplir esta necesidad, ya que esta experimentación se puede llevar a cabo de manera remota a través de las Tecnologías de la Información y la Comunicaciones, TIC, sin restricción de tiempo y espacio. Es por ello que los LR han empezado a coexistir con los laboratorios tradicionales en el ámbito de la educación superior.

  7. Sensoriamento remoto como subsídio à modelagem do balanço energético superficial

    Directory of Open Access Journals (Sweden)

    Vassiliki Terezinha Galvão Boulomytis

    2010-09-01

    Full Text Available O balanço energético superficial interfere no funcionamento do sistema terrestre através da relação existente entre a água e a energia solar e do modo como ocorre o seu processo de partição. Para a sua estimativa, modelagens vêm sendo realizadas utilizando-se de um ou mais sensores com diferentes resoluções, a fim de se obter dados com resoluções temporal e espacial adequadas a uma escala local. Neste estudo serão apresentados modelos para estimar a evapotranspiração e outros parâmetros biofísicos através do balanço energético superficial com a utilização dos sensores MODIS e AMSR-E.

  8. LABORATORIO REMOTO APLICADO A LA EDUCACION A DISTANCIA

    OpenAIRE

    2008-01-01

    Este trabajo muestra la arquitectura de un laboratorio remoto aplicado a la educación a distancia, a través de esta herramienta los estudiantes pueden realizar prácticas desde cualquier punto de conexión a Internet. El artículo muestra la arquitectura de un sistema de acceso remoto aplicado en un área como lo es la automatización industrial. Se realizó una aplicación Web que permite la identificación de usuarios, la administración del laboratorio y el acceso remoto de los equipos conectad...

  9. Experiencia de uso de un laboratorio remoto de control

    OpenAIRE

    2010-01-01

    En los últimos años, hemos asistido a un desarrollo significativo de los laboratorios remotos. Su integración en el ámbito académico ofrece muchas ventajas desde el punto de vista logístico. No obstante, desde el punto de vistas pedagógico, el impacto de la experimentación remota no es tan evidente. En este trabajo, se presenta una experiencia de utilización de un laboratorio remoto de control, dando las opiniones de los alumnos y así como la del profesor como usuarios de un sistema de experi...

  10. Uso de sensoriamento remoto orbital para avaliação da distribuição espacial de Clorofila_a na Lagoa da Conceição - Florianópolis, SC Use of orbital remote sensing in the assessment of spatial distribution of Chlorophyll_a in Lagoa da Conceição - Florianópolis, SC

    Directory of Open Access Journals (Sweden)

    Luiz C. P. Martini

    2006-12-01

    Full Text Available O trabalho buscou identificar a possibilidade do uso de sensoriamento remoto orbital no monitoramento da qualidade da água na Lagoa da Conceição, Florianópolis (SC, em especial do parâmetro Clorofila_a e suas implicações à cor da água, propriedade que pode ser avaliada a partir de imagens de satélite. No estudo, procurou-se obter uma correlação entre os níveis de Clorofila_a medidos em amostras de água da lagoa e o padrão de resposta espectral detectado por sensores embarcados no satélite comercial Landsat TM5. Os resultados do estudo revelaram que sistemas orbitais como o Landsat TM5 podem ser utilizados na investigação de parâmetros de qualidade da água que alteram a cor superficial de corpos hídricos e a partir de imagens de satélite é possível obter distribuição espacial da concentração substâncias tais como a Clorofila_a.This work searches to identify the possibility to use orbital remote sensing in the monitoring of water quality in Lagoa da Conceição, Florianópolis, SC, specifically regarding levels of Chlorophyll_a and its implications in water color, a property which can be evaluated through satelite imagery. The aim of his study was to obtain a correlation between the levels of Chlorophylla_a found in water samples from Lagoa da Conceição and the spectral response pattern detected by sensors built into the commercial satellite TM5. The results show that orbital systems like Landsat TM5 can be utilized in the investigation of water quality parameters that effect surface color in bodies of water. Through satellite imagery it is possible to obtain the spatial distribution of concentrated substances such as Chlorophyll_a.

  11. Sensoriamento remoto como suporte para estudos cartográficos sobre o território da América Portuguesa entre 1500 e 1822

    Directory of Open Access Journals (Sweden)

    Paulo R. Martini

    2009-01-01

    connection between the Amazon and Paraná¿Prata river basins based on their geomorphologic attributes as shown on the orbital images. The results were compiled into an 800-megabyte database and displayed at Museu Paulista. This paper describes the methodological procedures used to generate and analyze the images, and provides a summary of the research findings.

  12. Los docentes investigadores de la Facultad de Filosofía y Humanidades de la Universidad Nacional de Córdoba como usuarios remotos de bibliotecas universitarias The Teacher Researchers Belong to the Facultad de Filosofía y Humanidades of the Universidad Nacional de Córdoba as Remote Users of the University Libraries

    Directory of Open Access Journals (Sweden)

    María Carmen Ladrón de Guevara

    2012-06-01

    Full Text Available Se presentan los resultados de la investigación "Los docentes investigadores de la Facultad de Filosofía y Humanidades (FFyH de la Universidad Nacional de Córdoba (UNC como usuarios remotos de bibliotecas universitarias". La misma tuvo como objetivos conocer si los docentes investigadores de la FFyH son usuarios remotos de las bibliotecas universitarias e identificar sus hábitos y conductas en relación con el uso de la Web, lo que ayudará a construir un perfil de esta tipología de usuarios para poder satisfacer sus necesidades de información. Mediante el análisis de los datos obtenidos, se pudo reconocer la situación de los docentes investigadores de la Facultad en cuanto a la integración y apropiación que han tenido de Internet por medio de diferentes herramientas y servicios remotos brindados, especialmente por la biblioteca de la FFyH.The results of the research "The teacher researchers belong to the Facultad de Filosofía y Humanidades (FFyH of the Universidad Nacional de Cordoba (UNC as remote users of the university libraries" are outlined. The aims of the research are to know if the PHS teacher researchers are remote users of the university libraries and to identify their habits and behaviors related to the use of the Web. This research will allow building a user profile in order to satisfy their information needs. The analysis of the information obtained revealed the teacher researchers situation about their integration and appropriation of the Internet, especially those remote tools and services offered by the PHS library.

  13. Diseño de un laboratorio remoto de robots y procesos de manufactura industriales

    Directory of Open Access Journals (Sweden)

    Rafael Castillo Ortega

    2013-12-01

    Full Text Available El presente artículo aborda el diseño de un Laboratorio Remoto de Robots y Procesos de Manufactura Industriales. Primero se presenta el estado del arte y después se expone una propuesta que consiste en acceder por software al escritorio remoto de las PC que controlan dichos dispositivos y también acceder por hardware a un dispositivo diseñado para manipular el Teach pendant (consola de programación de los robots industriales para su programación sin modificar tanto el software propietario como el hardware original de cada equipo. Se utilizó un servidor web tipo LAMP programado con software libre para la administración del uso de los equipos; la retroalimentación de los usuarios remotos se realizó mediante monitoreo con cámaras IP.

  14. Distribuição da leishmaniose tegumentar por imagens de sensoreamento remoto orbital, no Estado do Paraná, Brasil Tegumentary leishmaniasis distribution by satellite remote sensing imagery, in Paraná State, Brazil

    Directory of Open Access Journals (Sweden)

    Airton Pereira Lima

    2002-12-01

    Full Text Available FUNDAMENTOS: A leishmaniose tegumentar (LT tem sua epidemiologia pouco conhecida no Estado do Paraná. OBJETIVOS: Verificar a distribuição geográfica dos casos de LT em quatro municípios do Paraná, usando imagens por sensoriamento remoto orbital (ISRO, correlacionando-a com a presença de vegetação remanescente e cursos d'água. MÉTODOS: A distribuição de 4.416 casos no Paraná, de 1993 a 1998, foi feita com informações da ficha de notificação da Secretaria de Saúde do Estado do Paraná. Por ISRO verificou-se a distribuição de 231 casos de LT e a correlação destes com as matas residuais e o grau de antropia nos municípios de Cianorte, Japurá, Jussara e São Tomé. RESULTADOS: Houve concentração de casos no Norte e Oeste do Paraná. As ISRO mostram que há relação muito íntima da LT com as áreas de mata nativa modificada, pequenas matas ciliares ou resquícios destas, nos municípios de Cianorte, Japurá, Jussara e São Tomé. CONCLUSÃO: Em Cianorte, Japurá, Jussara e São Tomé a LT tem íntima relação com áreas de mata nativa modificada, pequenas matas ciliares ou resquícios de ambas. Possivelmente, as áreas onde há mais casos de LT no Paraná guardam semelhanças com as desses municípios.BACKGROUND: The epidemiology of tegumentary Leishmaniasis (TL is poorly known in the State of Paraná. OBJECTIVES: To verify the geographical distribution of TL cases in four municipalities in the State of Paraná and correlate the notified TL cases with the presence of the remaining vegetation and water streams, using images by satellite monitoring. METHODS: The distribution of 4,416 cases of TL in the State of Paraná, from 1993 to 1998, was done according to the notification records used by the State of Paraná Health Secretariat. The distribution of 231 cases of TL and the correlation between these cases and the remaining forest, as well as the extent to which man has influenced the environment in Cianorte, Japur

  15. Infraestructura para laboratorios de acceso remoto

    Directory of Open Access Journals (Sweden)

    López Luro, Francisco

    2009-01-01

    Full Text Available Las tecnologías de Internet permiten el uso de sistemas de software distribuido para el acceso en forma remota a laboratorios físicos y virtuales, para llevar a cabo actividades de investigación experimental a distancia. A partir de los marcos teóricos que definen los estructurantes de los laboratorios, los implementadores de laboratorios de acceso remoto deben diseñar y desarrollar arquitecturas de servicios que permitan un acceso flexible y controlado. Este trabajo define una infraestructura para la implementación de aplicaciones para el acceso remoto a laboratorios físicos y virtuales y para la gestión de los mismos. Se presentan conceptos que permiten extender la modalidad tradicional de conexión con un dispositivo, para llevar adelante actividades prácticas de laboratorio colaborativas y concurrentes.

  16. TÉCNICAS DE SENSORIAMENTO REMOTO APLICADAS À BIOGEOGRAFIA: METODOLOGIA GEOGRÁFICA PARA ESPACIALIZAÇÃO DE MOLUSCOS TERRESTRES

    Directory of Open Access Journals (Sweden)

    Thiago Morato de Carvalho

    2008-06-01

    Full Text Available Este artigo tem como objetivo aplicar algumas técnicasde sensoriamento remoto, como produtos topográficospara interpretação da biogeografia de onze espécies demoluscos terrestres em Lima, Peru. A metodologia consistiuem técnicas de sensoriamento remoto e geoprocessamentopara a elaboração de mapas de localizaçãoe produtos topográficos, como declividade, hipsometria eperfis topográficos para análises geoespacial.

  17. Infraestructura para laboratorios de acceso remoto

    OpenAIRE

    2009-01-01

    Las tecnologías de Internet permiten el uso de sistemas de software distribuido para el acceso en forma remota a laboratorios físicos y virtuales, para llevar a cabo actividades de investigación experimental a distancia. A partir de los marcos teóricos que definen los estructurantes de los laboratorios, los implementadores de laboratorios de acceso remoto deben diseñar y desarrollar arquitecturas de servicios que permitan un acceso flexible y controlado. Este trabajo define una infraestructur...

  18. Monitoreo remoto de sistemas y redes para la auditoria informática

    OpenAIRE

    Ciolli, María Elena; Porchietto, Claudio; Rossi, Roberto; Sapolski, Juan

    2013-01-01

    Esta ponencia presenta el resultado del análisis e implementación de herramientas para el control remoto del hardware y software de una red informática basado en la conceptualización GLPI (gestión libre del parque informático) y en la norma ISO 27002 dominio 7 (gestión de activos) sección 7.1(inventario de activos). Se realizó un estudio comparativo entre dos herramientas: OCS Inventory NG y Open Audit. Se tomaron como factores claves la identificación unívoca de hardware y el software del pa...

  19. Uso do sensoriamento remoto orbital no monitoramento da dispersão de macrófitas nos reservatórios do complexo Tietê Remote satellite sensing to monitor macrophyte dispersion in the Tietê river reservoirs

    Directory of Open Access Journals (Sweden)

    M.L.B.T. Galo

    2002-01-01

    Full Text Available A presença de algumas substâncias na água, como pigmentos fotossintetizantes, particulados, etc., afeta sua cor, provocando mudanças na radiância da água registrada por sensores orbitais. Nesse sentido, o sensoriamento remoto pode se constituir em uma fonte complementar de dados para o monitoramento da qualidade da água em grandes reservatórios (Novo et al., 1994. No contexto de um projeto de pesquisa realizado na AES Tietê S.A., com o objetivo de desenvolver técnicas para a avaliação da área com infestação de plantas aquáticas, imagens orbitais multiespectrais foram usadas tanto para mapear a dispersão espacial e estimar a área de ocorrência de macrófitas aquáticas, em duas épocas distintas, quanto para orientar a definição de pontos de amostragem in loco, visando a coleta e posterior análise da água e de sedimentos nos reservatórios. Este trabalho apresenta uma descrição do procedimento metodológico adotado na análise das imagens multiespectrais, bem como os resultados obtidos na caracterização dos reservatórios de Barra Bonita, Bariri, Ibitinga, Promissão e Nova Avanhandava, em termos de seu dimensionamento, variabilidade espectral da água e presença de macrófitas emersas, nas duas épocas do ano consideradas.Water color is affected by substances that change the water radiance detected by satellite sensors. Thus, remote sensing techniques may be used as a complementary data source to monitor water quality in large reservoirs (Novo et al., 1994. Within the context of a research project, whose main purpose is to develop techniques to evaluate macrophyte infestation levels in AES Tietê reservoirs, multi spectral satellite images were used to: a map microphyte spatial dispersion and evaluate their area of occurrence , in two periods and, b locate points to collect water samples. This paper presents the methodology adopted and the results obtained from Barra Bonita, Bariri, Ibitinga, Promissão and Nova

  20. FUTURO REMOTO 2015: researchers meet people.

    Science.gov (United States)

    De Lucia, Maddalena; Fedele, Alessandro; Esposito, Roberta; Torello, Vincenzo; Nave, Rosella; Pino, Nicola Alessandro; Russo, Massimo; Alessio, Giuliana; Gaudiosi, Germana; Nappi, Rosa; Belviso, Pasquale; Carandente, Antonio; De Cesare, Walter; Sansivero, Fabio; Siniscalchi, Valeria; Borgstrom, Sven; Milano, Girolamo; Pasquale Ricciardi, Giovanni; De Natale, Giuseppe

    2016-04-01

    As participant of the 29th Edition of the cultural initiative "Futuro Remoto 2015", the INGV section of Naples Osservatorio Vesuviano has realized a temporary exhibition aimed to build bridges between the scientific community and the public. The event, a festival of art, culture, science and technology, has taken place on October 15th - 19th 2015, in Naples, Italy, in the city center, and was organized by "Città della Scienza", the science center of the city of Naples, belonging to the ECSITE netwok.. The total number of visitors was about 130.000 people. It was a free and open access event, funded by public institutions. Sharing their scientific expertise with the public, in the "Terra" ("Earth") stand the INGV-OV researchers have shown, with interactive labs, how progress in technology and research develope and allow a better understanding of the dynamic processes and of the evolution of our planet. Popularizing science, when widely accessible to the people, make the knowledge not remaining confined to an elite, being efficiently spread in society, with deep implications in the social role of researchers. Practical activities and labs, dialogues and interaction with researchers of INGV-OV have allowed young and adult public, schools, students, experts or simply curious people to deepen burning issues in an area exposed to high seismic and volcanic risk.

  1. Protective effect of N-acetylcysteine on kidney as a remote organ after skeletal muscle ischemia-reperfusion Efeito protetor da N-acetilcisteína no rim como um órgão remoto músculo esquelético após isquemia-reperfusão

    Directory of Open Access Journals (Sweden)

    Mohammad Ashrafzadeh Takhtfooladi

    2012-09-01

    Full Text Available PURPOSE: To investigate whether N-acetylcysteine has a protective effect against renal injury as a remote organ after skeletal muscle ischemia-reperfusion in rats. METHODS: Twenty Wistar male rats were divided randomly into two experimental groups: group ischemia-reperfusion (group I and group ischemia-reperfusion + N-acetylcysteine (group II. After ketamine and xylazine anesthesia, femoral artery was exposed. All animals were undergone 2h of ischemia by occlusion femoral artery and 24h of reperfusion. Rats that were treated with N-acetylcysteine given IV at a dose of 150 mg/kg-¹, immediately before reperfusion. After 24h of reperfusion, the blood samples were collected and submitted for evaluation of plasmatic urea, creatinine values and then rats were euthanized and left kidney harvested for histopathological analysis under light microscopy. RESULTS: The urea (35±7.84 mg.dL-1, creatinine (1.46±0.47 mg.dL-1 values were significantly lower in group II (P=0.000. Renal histopathologic study in group I showed extensive distal and proximal tubular cells necrosis and sloughing of epithelial cells into the tubular lumen, cast formation in tubule and glomerul, glomerul fibrosis and hemorrhage. Histopathologically, there was a significant difference (p=0.037 between two groups. CONCLUSION: The N-acetylcysteine was able to decrease renal injury induced by skeletal muscle ischemia reperfusion in rats.OBJETIVO: Investigar se a N-acetilcisteína tem um efeito protetor contra a lesão renal como um órgão remoto músculo esquelético após isquemia-reperfusão em ratos. MÉTODOS: Vinte ratos Wistar machos foram distribuídos aleatoriamente em dois grupos experimentais: grupo isquemia-reperfusão (grupo I e grupo isquemia-reperfusão N-acetilcisteína (grupo II. Após a anestesia de ketamina e xilazina, a artéria femoral foi exposta. Todos os animais foram submetidos a 2h de isquemia pela oclusão da artéria femoral e 24h de reperfusão. Os ratos que

  2. DESARROLLO TECNOLÓGICO DE LOS LABORATORIOS REMOTOS DE ESTRUCTURAS E INGENIERÍA SÍSMICA Y DINÁMICA ESTRUCTURAL

    Directory of Open Access Journals (Sweden)

    John Anderson Sandoval Moreno

    2008-01-01

    Full Text Available Este documento presenta el diseño y automatización de dos Laboratorios Remotos manejados virtualmente a través de Internet: Laboratorio Remoto de Estructuras y Laboratorio Remoto de Ingeniería Sísmica y Dinámica Estructural; el laboratorio de estructuras consta de 3 módulos correspondientes al Módulo de Estabilidad, Módulo de Resistencia de Materiales y Módulo del Marco Universal. El módulo de dinámica estructural es una mesa vibratoria que a través de un sistema de control reproducediferentes movimientos como sismos, impulsos y vibraciones armónicas y permite realizar ensayos con pequeñas estructuras modelo. A cada módulo se le adicionaron actuadores y sensores electrónicos de desplazamiento, aceleración, y fuerza, una tarjeta de adquisición de datos para enviar y recibir señales y comunicar el hardware de experimentación con el computador asociado; los cuales se interconectan a un Servidor Central que recibe a los usuarios y autoriza el acceso al móduloexperimental adecuado gracias a la interconexión de estos equipos por medio de un switch. Además, se presenta la estructura general de las interfaces de experimentación y el procedimiento realizado por el estudiante para utilizar los laboratorios remotos.

  3. Laboratorios remotos mediante MATLAB Web Server y Easy Java Simulations

    OpenAIRE

    Crespo Sánchez, Rubén Darío

    2011-01-01

    En el presente proyecto se realiza un estudio de diferentes tecnologías para implementar laboratorios remotos. La finalidad es que los alumnos puedan realizar prácticas de asignaturas de ingeniería de control desde cualquier lugar en el que dispongan de un PC con conexión a internet. Este proyecto surge debido al gran número de estudiantes que existe y el reducido número de sistemas de laboratorio, sobre todo cuando se trata de sistemas de laboratorio específicos que tienen un coste realmente...

  4. Conectividad de Java con bases de datos mediante invocación de objetos con métodos remotos (objetos RMI

    Directory of Open Access Journals (Sweden)

    Daladier Jabba Molinares

    2003-01-01

    Full Text Available El desarrollo de aplicaciones distribuidas está teniendo cada vez más auge entre las empresas del mundo; esto se debe a la gran importancia que ha adquirido el Internet en los últimos años. Para dar solución a esta necesidad surge1l arquitecturas distribuidas como RMl (Invocaci6n de Métodos Remotos. En este artículo se describe una de las principales arquitecturas empleadas para desarrollar aplicaciones basadas en objetos distribuidos, Java RMI. Además se presenta una comparación entre esta arquitectura y otras como CORBA, RPC y DCOM.

  5. Orbits

    CERN Document Server

    Xu, Guochang

    2008-01-01

    This is the first book of the satellite era which describes orbit theory with analytical solutions of the second order with respect to all possible disturbances. Based on such theory, the algorithms of orbits determination are completely revolutionized.

  6. Aplicaciones y retos del sensado remoto hiperespectral en la geología colombiana

    Directory of Open Access Journals (Sweden)

    Ariolfo Camacho-Velasco

    2015-09-01

    Full Text Available El Sensado Remoto (SR es una técnica que permite captar información de una escena sin entrar en contacto físico con ella, mediante el empleo de sensores ubicados, principalmente, en plataformas aéreas, los cuales captan información en diferentes rangos del espectro electromagnético, incluyendo el visible (VIS, el cercano al infrarrojo (NIR y el de ondas cortas del infrarrojo (SWIR. Teniendo en cuenta que cada material presente en una escena tiene características espectrales diferentes, es posible, a través del análisis de las firmas espectrales, realizar su identificación o clasificación mediante algoritmos. Las Imágenes Hiperespectrales (HSI captadas por sensores remotos en cientos de bandas espectrales son de importancia en áreas como la geología, la mineralogía, la agronomía y la ecología, entre otras; sin embargo, el gran volumen de literatura dispersa en diferentes líneas (SR, HSI y geología dificulta su acceso y análisis. Este trabajo presenta un compendio de conceptos, principios básicos y fundamentos matemáticos del SR, e incluye investigaciones y tendencias de él, destacando su desarrollo y sus retos en Colombia, y un caso de uso de HSI en la geología colombiana, cuyas evaluaciones muestran la capacidad de detección del sensor hiperespectral Hyperion, ubicado en el satélite EO-1, para el mapeo geológico en un sitio de prueba al noroccidente del municipio de Girón, departamento de Santander. Los resultados de las evaluaciones son satisfactorios; espectralmente, el coeficiente de correlación fue alto y la relación espacial entre la firma espectral obtenida y la geología conocida del área fue aceptable y correspondió al análisis de Difracción de Rayos X (DRX realizado a muestras tomadas del área de estudio.

  7. Tumor orbitário como primeira manifestação clínica de mieloma múltiplo: relato de caso Orbital tumor as the first clinical manifestation of multiple myeloma: case report

    Directory of Open Access Journals (Sweden)

    Aline Ruilowa de Pinho

    2009-02-01

    Full Text Available O acometimento da órbita pelo mieloma múltiplo é raro. Neste estudo, os autores descrevem um caso infrequente de proptose como primeiro sinal clínico do mieloma múltiplo. A presença de lesão orbitária expansiva associada a destruição do rebordo superior da órbita, notáveis à tomografia computadorizada, fez com que a diagnóstico de mieloma múltiplo fosse considerado. Aspectos diagnósticos e terapêuticos são discutidos.Orbital involvement by multiple myeloma is rare. In this study, the authors report an unusual case of proptosis as the first clinical sign of multiple myeloma. The presence of an orbital lesion expanding and destroying the superior orbital rim, disclosed by computed tomography, lead us to consider multiple myeloma. Diagnostic and therapeutic aspects are discussed.

  8. Análisis y monitoreo remoto de las variables ambientales en un entorno indoor, por medio de un dispositivo móvil con android

    Directory of Open Access Journals (Sweden)

    Diego Felipe Prieto Morales

    2015-10-01

    Full Text Available La implementación de técnicas de automatización en el desarrollo de actividades en la vida cotidiana, ha permitido elaborar sistemas orientados a mejorar el confort en el interior de las estructuras habitadas por personas, permitiendo estudiar variables ambientales como la temperatura, humedad e intensidad de luz. Entre las temáticas con mayor interés en investigación, se encuentra la domótica, la cual integra la necesidad de proporcionar seguridad, gestión energética y bienestar en el mismo. En el presente artículo, se expone los resultados obtenidos del análisis y control remoto de las variables ambientales en el interior de un prototipo de un apartamento. Los resultados obtenidos se orientaron a mejorar las condiciones de hospedaje y seguridad, en entornos cotidianos de la población urbana y de este modo realizar un monitoreo remoto por medio de un dispositivo móvil con sistema operativo Android.

  9. DEL SÁNSCRITO AL ESPAÑOL. PRÉSTAMOS REMOTOS Y ADECUACIONES

    OpenAIRE

    Argüello Scriba, Sol

    2012-01-01

    Este artículo presenta los préstamos remotos del sánscrito al español, con el objetivo de analizar su significado de conformidad con la correspondiente etimología. This paper presents the presence of the remote lending Sanskrit words into Spanish language, with the objective to analize it’s meaning with the corresponding ethimology.

  10. SIG e Sensoramiento Remoto Orbital auxiliando o zoneamiento ecológico

    Directory of Open Access Journals (Sweden)

    Marisa Dantas Biencourt

    1998-01-01

    Full Text Available Since the 80´s, the use of satellite remote sensing and GIS have became progressively helpful, when users decide to start looking for homogeneous landscape units to establish the ecological zoning. Those landscape units should be based on geomorphologie, vegetation, and land use aspects. From satellite data one can extract phytophysiognomies and land use, from maps, one can generate hydrography and topography, and from digital terrain models one can obtain hypsometry and slope classes. Overlaying phytophysiognomies with geomorphology one can obtain landscape units, which, overlaid with slope classes, can generate fragility levels. The zoning map results from the combination of the fragilities, objectives and requirements to preserve the area, Predictive models using GIS and satellite data showed an excellent performance for the definition of ecological zoning.

  11. Proptose ocular como manifestação clínica de tumores malignos extra-orbitários: estudo pela tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Baptista Ana Célia

    2003-01-01

    Full Text Available Doenças sistêmicas, doenças orbitárias primárias e lesões extra-orbitárias com extensão secundária para a órbita podem causar proptose ocular. Foram estudados, por tomografia computadorizada, 11 pacientes com proptose ocular causada por tumores malignos extra-orbitários, sem qualquer tratamento prévio do tumor. Houve predomínio de neoplasias não-epiteliais (82%, tendo sido três rabdomiossarcomas (27% e três linfomas não-Hodgkin (27%. Outros sarcomas estiveram presentes em dois casos (18%, seguidos por linfoma de Burkitt (9%, carcinoma epidermóide (9% e carcinoma pouco diferenciado (9%. Nove tumores (82% tiveram origem nas cavidades sinonasais, a maioria (cinco casos com origem no seio etmoidal. Proptose ocular foi a única alteração oftálmica em quatro casos (36%, e um paciente teve proptose ocular bilateral como único sinal da doença. Dezessete órbitas foram acometidas pelos 11 tumores, já que seis pacientes tiveram comprometimento orbitário tumoral bilateral. Os tumores se estenderam às órbitas preferencialmente através da parede óssea orbitária (16 órbitas; 94%. Das 17 órbitas comprometidas, a maioria (59% teve todos os compartimentos lesados. Em 16 órbitas o tumor apresentou situação extraconal. À tomografia computadorizada, proptose ocular esteve presente em 15 das 17 órbitas (88%, tendo sido bilateral em quatro casos (oito órbitas. Houve predomínio de proptose ocular grau 2 à tomografia computadorizada (sete pacientes; 47%. Um total de 44 regiões crânio-faciais foi comprometido, além da órbita e do sítio de origem da neoplasia, indicando a grande extensão loco-regional desses tumores no momento do diagnóstico.

  12. Acceso remoto a datos en plataforma ARM vía ethernet

    OpenAIRE

    2010-01-01

    El Grupo de Investigación (GIDAM), de la Universidad de Pinar del Río, trabajó en un proyecto orientado al diagnóstico de sistemas electromecánicos (aerogeneradores), para lo cual se dispuso de un sistema embebido de tecnología ARM, que cuenta con datos de mediciones almacenados en una memoria local USB, pero sin garantizarse el acceso remoto a los datos. Este acceso es importante para monitorear el estado de los componentes electromecánicos de...

  13. ACCESO REMOTO A DATOS EN PLATAFORMA ARM VÍA ETHERNET

    OpenAIRE

    2010-01-01

    El Grupo de Investigación (GIDAM), de la Universidad de Pinar del Río, trabajó en un proyecto orientado al diagnóstico de sistemas electromecánicos (aerogeneradores), para lo cual se dispuso de un sistema embebido de tecnología ARM, que cuenta con datos de mediciones almacenados en una memoria local USB, pero sin garantizarse el acceso remoto a los datos. Este acceso es importante para monitorear el estado de los componentes electromecánicos desde una computadora situada centralmente en el pa...

  14. Sistema de Controlo Remoto de Luzes de Aeródromo

    OpenAIRE

    2015-01-01

    Este relatório apresenta o trabalho realizado no âmbito da unidade curricular de Dissertação do Mestrado em Engenharia Electrotécnica e de Computadores – área de especialização de Automação e Sistemas. O trabalho realizado consiste no desenvolvimento de um Sistema de Controlo Remoto de Luzes de Aeródromo (SCRLA) que pode ser aplicado em paralelo aos comandos locais de controlo das luzes de aproximação, pista ou circulação, entre outras, de uma infra-estrutura aeroportuária. O objectivo ...

  15. Evaluación de las prestaciones de la red GPRS para aplicaciones de monitoreo remoto

    OpenAIRE

    Friedrich, Guillermo Rodolfo; Ardenghi, Jorge Raúl

    2006-01-01

    Las redes de telefonía celular GSM, a través del servicio GPRS (General Packet Radio Service), son una alternativa interesante al momento de seleccionar una tecnología de comunicación para aplicaciones de monitoreo remoto. Si bien GPRS tiene un costo de utilización en función del volumen de datos transferidos, algunos aspectos favorables son: baja inversión inicial y simplicidad para transferir datos a cualquier sitio en la Internet. A diferencia de otros autores que han evaluado el desempeño...

  16. Sistemas de informacion geografica y sensores remotos. Aplicaciones en enfermedades transmitidas por vectores.(Perspectiva general de la enfermedad/trastorno)

    National Research Council Canada - National Science Library

    Parra-Henao, Gabriel

    2010-01-01

    Los sistemas de informacion geografica y los sensores remotos son poderosas herramientas para estudiar la distribucion actual y predecir areas de riesgo de presencia de insectos vectores de enfermedades...

  17. Análisis y monitoreo remoto de las variables ambientales en un entorno indoor, por medio de un dispositivo móvil con android

    National Research Council Canada - National Science Library

    Diego Felipe Prieto Morales; Fernando Antonio Moreno Forero

    2015-01-01

    ... del análisis y control remoto de las variables ambientales en el interior de un prototipo de un apartamento. Los resultados obtenidos se orientaron a mejorar las condiciones de hospedaje y seguridad, en entornos cotidianos de la población urbana y de este modo realizar un monitoreo remoto por medio de un dispositivo móvil con sistema operativo Android.

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

    Directory of Open Access Journals (Sweden)

    Walter Fuertes, Maritza Enríquez y Diego Veloz

    2011-05-01

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

  19. Efectividad Comparativa del Seguimiento Remoto a Personas con Marcapasos Cardíacos Frente al Convencional: Calidad de Vida a los 6 Meses

    Directory of Open Access Journals (Sweden)

    Antonio López - Villegas

    2015-01-01

    Full Text Available El uso del seguimiento remoto (SR de personas portadoras de marcapasos (MP es limitado en comparación con la modalidad hospitalaria (SH, siendo escasa la evidencia científica que muestre su efectividad. El objetivo de este estudio fue comparar la calidad de vida en personas con diferentes modalidades de seguimiento.Métodos: Ensayo clínico controlado, no aleatorizado ni enmascarado, con recogida de datos pre y post-implante del marcapasos durante los 6 meses de seguimiento. Se seleccionó a todos los pacientes mayores de 18 años a los que se les implantó un marcapasos en el periodo de estudio (n=83, sien¬do asignados al grupo SR (n=30 o al grupo SH (n=53, en función de sus características personales y preferencias. Se analizaron las características basales y número de visitas al hospital, y se administró el cuestionario EuroQol-5D (EQ-5D para evaluar la calidad de vida relacionada con la salud y el Duke Activity Status Index (DASI para valorar la capacidad funcional.Resultados: No hubo diferencias significativas entre ambos grupos en relación al análisis basal, EQ-5D (SR:0,7299; SH:0,6769 y DASI (SR:21,41; SH:19,99 iniciales. A los 6 meses la calidad de vida mejoró en ambos grupos (SR:0,8613; SH:0,8175; p=0,439 aun sin diferencias estadísticamente significativas entre ellos. La puntuación final en el DASI fue similar a la basal (20,51 vs 21,80. El grupo de SR realizó menos visitas/transmisiones por paciente (1,57 que el grupo hospitalario (1,96, la reducción relativa fue del 31% (p=0,015.Conclusiones: El seguimiento remoto de personas portadoras de marcapasos se podría considerar como una opción equivalente al hospitalario en relación a la calidad de vida y reduce el número de visitas al hospital.

  20. IDENTIFICAÇÃO DE ILHAS DE CALOR POR MEIO DE SENSORIAMENTO REMOTO: ESTUDO DE CASO NO MUNICÍPIO DE GOIÂNIA – GO/2001

    Directory of Open Access Journals (Sweden)

    Diego Tarley Ferreira Nascimento

    2009-06-01

    Full Text Available No presente trabalho são utilizadas técnicas de sensoriamento remoto para identificação e análise do fenômeno de ilhas de calor em Goiânia-GO, tendo como recorte temporal o ano de 2001. Foi utilizada a proposta metodológica de Monteiro (1976, do Sistema de Clima Urbano – SCU, em particular o subsistema Termodinâmico, visando proceder a uma análise do funcionamento, desempenho e organização do fenômeno de ilhas de calor. A elaboração do trabalho baseou-se na classificação da cobertura do solo e em um mapeamento do campo térmico do município de Goiânia, por meio das imagens das bandas 3, 4, 5 e 6 (banda termal do Landsat 7, nas quais foram considerados como instrumentos de análise: a urbanização, as características geoecológicas (topografia e o sistema meteorológico (clima regional. Os resultados demonstram que o fenômeno de ilha de calor é constatado no município de Goiânia, havendo diferenças de temperatura de até 10°C entre a área urbana e a rural do município, sendo possível caracterizar determinados usos antrópicos (classes de cobertura do solo e intervalos altimétricos como potencializadores de maiores valores de temperatura.

  1. Laboratorio remoto para la enseñanza de la programación de un robot industrial

    Directory of Open Access Journals (Sweden)

    Carlos Ariza L.

    2011-06-01

    Full Text Available El presente artículo describe la evolución del desarrollo y funcionamiento de un laboratorio remoto para la enseñanza de la automatización. Por medio de una aplicación Web, un software de acceso remoto que permite una conexión multiusuario independiente y archivos que contienen código con comandos del símbolo del sistema. Con esto se logra administrar el laboratorio evitando conflictos de uso entre los usuarios. Con este desarrollo se busca incrementar el tiempo de productividad y eliminar las restricciones de espacio y tiempo para la utilización de un robot manipulador de tipo industrial.

  2. Desarrollo de curvas espectrales del crecimiento anual de la vegetación, usando sensores remotos

    Directory of Open Access Journals (Sweden)

    Fernando Paz-Pellat

    2011-01-01

    Full Text Available El desarrollo de curvas del crecimiento de la vegetación (pastizales y matorrales, a nivel histórico, plantea retos importantes por falta de estadísticas en México. La tecnología de sensores remotos en plataformas espaciales, por medio de índices de vegetación o IV, permite realizar una aproximación en esta dirección. Este trabajo discute un esquema de modelación paramétrica (indirecta de la curva de crecimiento de la biomasa en píxeles individuales de sensores Advanced Very High Resolution Radiometer o AVHRR y Moderate Resolution Imaging Spectroradiometer o MODIS, permitiendo así su caracterización usando algoritmos de pre y post-proceso. Los resultados obtenidos de la aplicación de los algoritmos discutidos en este trabajo, permiten la obtención de curvas anuales del crecimiento a la escala de 100 ha (AVHRR y 6.25 ha (MODIS, que pueden ser usadas en estudios de cambio climático y del manejo de agostaderos en México.

  3. Manejo del enoftalmos como secuela de fracturas del complejo cigomático-orbitario con apoyo de estereolitografía Management of enophtalmos as sequelae of zygomatic complex orbital fractures with stereolitography model support

    Directory of Open Access Journals (Sweden)

    H. Malagón Hidalgo

    2011-03-01

    Full Text Available El enoftalmos postraumático se define como la discrepancia entre el volumen orbitario y su contenido; este balance puede verse alterado por múltiples factores, como el secuestro tardío del contenido orbitario por atrapamiento en el sitio de la fractura, herniación del contenido orbitario, necrosis del tejido adiposo orbitario, contracción cicatricial del tejido retrobulbar, pérdida del sistema de suspensión ligamentario del globo ocular y aumento de volumen de la cavidad orbitaria. El presente estudio aborda el problema del enoftalmos postraumático como una deformidad difícil de corregir. Están descritos abordajes cutáneos extensos como el coronal, el subciliar o el intraoral; la técnica descrita por Henry Kawamoto en 1998 describe un procedimiento de menor invasión mediante abordajes de mínima exposición que permiten la refracturación y el alineamiento del cuerpo zigomático, brindando así grandes ventajas sobre las técnicas convencionales. Presentamos el método aplicado en el servicio de Cirugía Reconstructiva del Centro Médico del Instituto de Seguridad Social del Estado de México y Municipios (ISSEMyM para el manejo de pacientes con enoftalmos como secuela de traumatismos del complejo cigomático-malar; para ello empleamos un método por asistencia con modelos estereolitográficos para la planificación quirúrgica del diseño de osteotomías para corregir la deformidad facial y para determinar las dimensiones del defecto a reparar, así como el tipo y cantidad de materiales aloplásticos o autólogos a emplear. Compartimos la experiencia de los casos tratados en nuestro Servicio entre 2006 y 2010.Post-traumatic enophthalmos is defined as the discrepancy between the orbital volume and its content; this balance can be altered by many factors, such as the entrapment or herniation of the orbital content at the fracture site, orbital adipose tissue necrosis, scar contraction of the retrobulbar tissue, loss of the eyeball

  4. Sensoriamento remoto da vegetação: evolução e estado-da-arte = Remote sensing of vegetation: evolution and state of the art

    Directory of Open Access Journals (Sweden)

    Laerte Guimarães Ferreira

    2008-10-01

    Full Text Available Levantamentos sistemáticos da cobertura vegetal no Brasil, à escala desemidetalhe, incluem aqueles realizados no âmbito dos projetos Radam e Radambrasil, no período de 1971 a 1977, tendo por base imagens de radar aerotransportadas e, mais recentemente, os mapeamentos, com base em imagens Landsat 7 ETM+, dos remanescentes da cobertura vegetal nos biomas brasileiros (projeto MMA/PROBIO, concluídos em 2006. Nestes pouco mais de 30 anos, muitas mudanças ocorreram, tanto na cobertura vegetal do país quanto no sensoriamento remoto orbital. Neste artigo de revisão, apresentamos, do ponto de vista conceitual e tecnológico, a evolução e o estado-da-arte dos sistemas sensorese discutimos algumas das técnicas mais utilizadas para decodificar (ex. em parâmetros biofísicos etc. e classificar a resposta espectral da vegetação. Da mesma forma, apresentamos as principais iniciativas, históricas ou em curso, voltadas ao monitoramento da cobertura vegetal dos biomas brasileiros.Systematic surveys of the vegetative cover in Brazil include the semi-detailed mappings conducted within the scope of the Radam and Radambrasil projects, between 1971 and 1977, based on side-looking airborne radar images, and more recently, the assessments, based on Landsat 7 ETM+ imagery, of the remnant vegetation cover of the Brazilian biomes (MMA/PROBIO, finished in 2006. In a little more than 30 years, many changes have occurred, both in vegetation cover as well as in orbital remote sensing. In this review article,we discuss, from a conceptual and technological perspective, the evolution and the state of the art of imager sensors, as well as some of the enhancement techniques utilized for decoding (e.g., in biophysical parameters, etc. and classifying the spectral response ofvegetation. Likewise, we present the main current (pioneering initiatives for land cover monitoring of the Brazilian biomes.

  5. Uso de imagens orbitais como base de dados para projetos de reforma agrária The use of orbital images as subsidies to agrarian reform projects

    Directory of Open Access Journals (Sweden)

    Marina de Fátima Vilela

    2005-08-01

    Full Text Available Análises técnica e econômica foram realizadas em imagens dos sensores IKONOS, TM/Landsat 5, ETM+/Landsat 7 e CCD/CBERS, objetivando a verificação da viabilidade destas como base de dados em projetos de reforma agrária. Essas análises efetuadas e a situação de mercado indicaram que a imagem IKONOS apresenta excelente desempenho técnico, mas o custo de aquisição inviabiliza sua utilização como base de dados para a reforma agrária. A imagem do Landsat 7, com baixo custo de aquisição, apresentou grande viabilidade técnica para fins de reforma agrária. No entanto, a perda do contato com a plataforma Landsat 7 inviabilizou a compra de novas imagens do sensor ETM+. A imagem CCD/CBERS apresentou a segunda maior similaridade com a verdade de campo e o menor índice Kappa para a classificação. Apesar do baixo índice de exatidão para a classificação, as análises de custo, o lançamento do CBERS-2 e a possibilidade de correção dos problemas de radiometria podem tornar as imagens da plataforma CBERS-2 concorrentes de peso no mercado e, ainda, preencher a lacuna deixada pela perda do Landsat 7. A imagem do Landsat 5 apresentou o mais baixo desempenho técnico nas análises efetuadas. Entretanto, seu potencial como base de dados é amplamente reconhecido pelo INCRA, que ainda utiliza tais imagens. O declínio da vida útil do Landsat-5 atribui mais importância ao lançamento do CBERS-2.Technical and economical analyses were performed on IKONOS, Landsat TM 5 and Landsat ETM+ 7 and CCD/CBERS data in order to verify their feasibilities to subsidy agrarian reform projects. Results showed that IKONOS data presented excellent technical viability but its high cost prevents its use. Landsat ETM+ 7 data, with low cost, presented good technical viability, however due to the problems occurring in the satellite operation, its use was also prevented . CCD/CBERS data presented the second best similarity with the ground truth data, although it

  6. Teleoperación de un vehículo remoto en un medio de acceso inalámbrico mediante el uso de una interfaz háptica Remote vehicle teleoperation through a haptic interface

    Directory of Open Access Journals (Sweden)

    Arys Carrasquilla Batista

    2012-11-01

    Full Text Available La teleoperación permite que el ser humano pueda llevar a cabo ciertas tareas en lugares muy lejanos, de difícil acceso o de condiciones hostiles para la presencia de un operador. Con este proyecto se logró teleoperar un vehículo remoto por medio del protocolo de comunicación Bluetooth, para lo cual se adaptó una interfaz háptica (Novint Falcon. Desde la interfaz, el operador puede enviar la consigna de movimiento y, además, obtener sensaciones conforme a la información de los sensores incluidos al sistema. Como vehículo remoto se utilizó un Lego Mindstorms con capacidad de comunicación Bluetooth, al cual se incorporó un sensor de contacto y otro de ultrasonido con el fin de percibir en la interfaz háptica la retroalimentación de fuerzas. A una computadora estándar se le dio capacidad de comunicación Bluetooth por medio de un adaptador USB, desde la cual se ejecuta un programa creado en C++ para controlar las acciones de la interfaz háptica, enviar los comandos de movimiento al vehículo y recibir la información de los sensores, la cual reproduce sensaciones al operador.Teleoperation allows human beings to carry out certain tasks in places far away, inaccessible or with hostile conditions for the presence of an operator. In this project a remote vehicle is teleoperated using a bluetooth wireless connection, to accomplish this an haptic interface (Novint Falcon was used. The operator can give movement instructions to the vehicle and obtain sensations, according to the information received from the sensors connected to the system. The remote vehicle was a Lego Mindstorms with bluetooth communication capabilities, a touch sensor and ultrasonic sensor were included in order to perceive reflection of forces through the haptic interface. A USB adapter for bluetooth communication was added to a standard computer; a program in C++ is executed over this computer to control the haptic interface, send movement commands to the vehicle and

  7. O ESTADO DA ARTE DA DESERTIFICAÇÃO: ANÁLISE DOS PRINCIPAIS PERIÓDICOS DA ÁREA DE SENSORIAMENTO REMOTO

    Directory of Open Access Journals (Sweden)

    Kelly de Oliveira Barros

    2012-07-01

    Full Text Available Foi realizada uma pesquisa para identificaçãor as metodologias que vêm sendo aplicadas no estudo da desertificação assim como a frequência com que trabalhos sobre esta temática estão sendo publicados. O Simpósio Brasileiro de Sensoriamento Remoto – SBSR e cinco revistas internacionais: Remote Sensing of Enviroment, Photogrammetric Engineering and Remote Sensing, International Journal of Remote Sensing, IEEE Transactions on Geoscience and Remote Sensing e International Journal of Applied Earth Observation and Geoinformation foram escolhidos para a triagem. Foram encontrados 24 artigos que trataram da desertificação no SBSR. Neste evento destacou-se o ano de 2010, quando foram identificados 10 trabalhos com a temática. Na análise das revistas foram registradas 31 publicações, e o maior número de trabalhos publicados também ocorreu em 2010, com cinco documentos. Destaque para a International Journal of Remote Sensing, com o maior número de trabalhos sobre a desertificação, 18. Percebeu-se uma carência ainda no âmbito de publicações internacionais em revistas sobre o processo da desertificação. Ressalta-se que a revista Photogrammetric Engineering and Remote Sensing não apresentou nenhum trabalho sobre o processo. As metodologias adotadas foram variadas e inovadoras, especialmente nos trabalhos publicados nas revistas. Pode-se perceber que a utilização do índice de vegetação (NDVI, seja de maneira individual ou complementar ao trabalho, foi uma metodologia que se destacou em número dentre as demais. No entanto, notou-se a falta de uma abordagem multidisciplinar para se estudar o processo. Porém, foi possível perceber que tanto o estudo da desertificação quanto o uso de geotecnologias para este fim, está em franco crescimento.

  8. COMPARTIMENTAÇÃO GEOMORFOLÓGICA E MORFOTECTÔNICA DO GRÁBEN DO CARIATÁ, PARAÍBA, A PARTIR DE IMAGEAMENTO REMOTO

    Directory of Open Access Journals (Sweden)

    Bruno Azevedo Cavalcanti Tavares

    2014-12-01

    Full Text Available Desde a sua identificação, a unidade geomórfica Gráben do Cariatá se tornou se fundamental importância para a interpretação do cenário morfotectônico regional no contexto do rebordo leste do nordeste do Brasil, desafiando algumas hipóteses prévias sobre a evolução geomórfica do piemonte do planalto da Borborema. Neste sentido faz-se necessário refinar o conhecimento referente à história geomórfica do gráben, de seus preenchimentos sedimentares, unidades pedo-estratigráficas e controles lito-estruturais sobre as associações de formas de relevo. Um estudo desta ordem pode lançar luz sobre a evolução dos compartimentos escalonados que antecedem a escarpa da Borborema e suas implicações sob pontos de vista páleo-climáticos e neotectônicos, a partir de abordagens que prescindam da utilização do conceito das superfícies regionais de aplainamento. A combinação de Modelos digitais do terreno e imagens de satélite propiciaram uma modelagem mais precisa da área de estudo, sendo uma importante ferramenta para a análise da influencia da neotectônica sobre a compartimentação do relevo. Desse modo, feições como escarpas, facetas triangulares, anfiteatros de erosão e vales lineares foram identificados a partir de técnicas de sensoriamento remoto e estão estritamente ligadas às linhas de reativação de falhas no gráben. A rede de drenagem principal da área de estudo, o rio Paraíba, também está influenciada pela dinâmica morfotectônica, o que se faz explicitar a partir de uma incisão de maior ordem em determinados setores, resultando mesmo no abandono da antiga planície sob a forma de terraços erosivos.

  9. Laboratório remoto para monitorização e controlo baseado em MATLAB/Simulink e LabVIEW

    OpenAIRE

    Silva, Luís Filipe Fernandes Brazão da

    2011-01-01

    Dissertação submetida à Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Electrotécnica e Computadores O uso de laboratórios remotos no ensino tem vindo a aumentar na última década. Em Portugal, verificou-se um esforço para introduzir laboratórios remotos no ensino básico, secundário e universitário. Hoje em dia são vastas as oportunidades que a Internet oferece no ensino, onde por exemplo são cada vez mais utilizadas técnicas de e-learning que permitem aos alunos ...

  10. Celulitis orbitaria como forma de presentación de la sinusitis complicada en el niño Orbital cellulitis as a way of presentation of the complicated sinusitis in the child

    Directory of Open Access Journals (Sweden)

    Odette Pantoja Pereda

    2012-03-01

    Full Text Available La sinusitis aguda es un proceso inflamatorio de la mucosa de los senos paranasales, de etiología bacteriana principalmente. Es más frecuente en las edades escolares y en las épocas de mayor circulación de los virus respiratorios. Se desarrolla cuando se afecta el drenaje normal de los senos y se retienen las secreciones mucosas. Las complicaciones más severas, como celulitis y abscesos periorbitarios, son raras. La celulitis orbitaria es una entidad poco frecuente, cuya importancia radica en que puede asociarse a la pérdida de la visión y otras complicaciones. Se presenta el caso de un paciente de 6 años, afectado con celulitis orbitaria, secundaria a sinusitis, y se comentan las peculiaridades del diagnóstico y el tratamiento, con el objetivo de alertar al pediatra para su diagnóstico temprano, lo que optimizaría su tratamiento.The acute sinusitis is a inflammatory process of the mucosa of paranasal sinuses, the more important bacterial etiology. It is more frequent in the school ages and in the periods of more circulation of the respiratory viruses, which develops when the normal drainage of the sinuses is involved and there is retention of the mucosa secretions. The more severe complications including cellulitis and periorbital abscesses are rare. The orbital cellulitis is an entity not much frequent, whose significance lie in it may be associated to loss of vision and other complications. Authors present the case of a patient aged 6 presenting with orbital cellulitis, secondary to sinusitis and the particular feature of diagnosis and treatment to alert pediatrician for its early diagnosis, optimizing its treatment.

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

    Directory of Open Access Journals (Sweden)

    José Geraldo de Abreu Sousa Junior

    2008-04-01

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

  12. Utilização de sensoriamento remoto em análises de albedo e temperatura de superfície em Londrina - PR: contribuições para estudos de ilha de calor urbana

    Directory of Open Access Journals (Sweden)

    Nancy Laura Rios Gamarra

    2014-12-01

    Full Text Available Este trabalho avaliou o albedo (αs e a temperatura de superfície continental (Tsup provenientes de sensoriamento remoto, e a temperatura do ar (Tar medida in situ no intuito de caracterizar a Ilha de Calor Urbana (ICU na cidade de Londrina (Paraná. Foram utilizados dados de αs e Tsup obtidos do sensor MODIS, e medições in situ de Tar realizadas entre junho e agosto de 2011 por sensores meteorológicos instalados em 13 locais na cidade. Os dados de αs e Tsup foram utilizados para calcular um índice de urbanização (IU na região e posteriormente comparado com Tar. A análise dos dados de αs e Tsup foi consistente com as medições in situ, evidenciando sua aplicabilidade na avaliação espaço-temporal de fenômenos acoplados continente-atmosfera, tais como a ICU. A mancha urbana da cidade de Londrina apresentou valores de IU compreendido entre 18 e 20, bem maiores que as áreas mais vegetadas (14 - 16. Nesse sentido, o IU demonstrou-se ser uma metodologia útil para representar a evolução espaço-temporal de áreas urbanas, o que pode propiciar uma avaliação detalhada do impacto da mudança de cobertura de solo no clima local e regional. Além disso, os resultados indicam que dados obtidos via satélite podem auxiliar grandemente na quantificação da ICU, quando dados in situ estiverem indisponíveis.

  13. Laboratorio remoto en un EVEA, para la enseñanza y el aprendizaje de la programación de microcontroladores

    OpenAIRE

    Revuelta, Miguel A.; Massa, Stella Maris; Bertone, Rodolfo Alfredo

    2014-01-01

    En este paper se describe y fundamenta la implementación de un trabajo de laboratorio en forma remota sobre un objeto de existencia real mediante un conjunto de actividades desarrolladas en un Entorno Virtual de Enseñanza y Aprendizaje (EVEA). Un laboratorio que integra recursos de e-learning con instrumentos tangibles o reales (tradicionalmente usados en las prácticas presenciales), se denomina en términos generales Laboratorio Remoto (LR) [1]. Específicamente esta iniciativa permitirá...

  14. Orbital cellulitis

    Science.gov (United States)

    ... hemolytic streptococci may also cause orbital cellulitis. Orbital cellulitis infections in children may get worse very quickly and ... in the space around the eye. An orbital cellulitis infection can get worse very quickly. A person with ...

  15. PATRONES ESPECTRALES MULTI-ANGULARES DE CLASES GLOBALES DE COBERTURAS DEL SUELO USANDO, EL SENSOR REMOTO POLDER-1

    Directory of Open Access Journals (Sweden)

    Fernando Paz

    2015-06-01

    Full Text Available El uso de información espectral multi-angular de sensores remotos en plataformas espaciales tiene el potencial de discriminar clases de coberturas del suelo y otras aplicaciones. En este trabajo se explora el uso de la base del sensor POLDER-1(fuera de operación en la plataforma ADEOS, el cual permitió obtener hasta 14 mediciones multi-angulares de un mismo pixel. La base de datos fue analizada ajustando un modelo de la función de distribución bidireccional de las reflectancias (BRDF en las bandas centradas en 443, 565, 670, 765 y 865 micrómetros, para diferentes clases de cobertura del suelo del sistema GLC2000 y así analizar el potencial de usar información multi-angular para discriminar clases de cobertura. Los resultados mostraron los mejores ajustes en las bandas 765 y 865, seguidos por las bandas 565 y 670 y, finalmente, los peores ajustes se dieron en la banda 443. Los errores de ajuste pueden ser interpretados por problemas en la corrección atmosférica asociada a los aerosoles troposféricos (mayores efectos en las bandas del visible. Con el modelo de la BRDF ajustado, que usa un solo parámetro (G, se analizó su uso para discriminar clases de cobertura, resultando que la banda 670, seguida por la 443, mostraron un mayor potencial, con una precisión aceptable, de realizar una clasificación de coberturas del suelo.

  16. Pizarra Virtual Compartida Websockets; una solución para trabajo remoto colaborativo

    Directory of Open Access Journals (Sweden)

    Xavier Sotomayor

    2017-02-01

    Full Text Available La Pizarra Virtual Compartida Websockets, PVCW, es un sistema para trabajo compartido que habilita a sus usuarios a colaborar de manera remota, en línea y en tiempo real. El sistema proporciona una pizarra virtual que actúa como un espacio de trabajo en el cual las interacciones de cualquier participante se sincronizan automática e inmediatamente con los demás. En el lado servidor el sistema se implementa mediante la Java Enterprise Edition utilizando la tecnología WebSockets. En el lado cliente no es necesario efectuar ninguno tipo de instalación dado que cualquier browser de nueva generación que soporte WebSockets mediante Javascript, sea en dispositivos de escritorio o móviles, es capaz de integrarse a una sesión de trabajo. Esta configuración permite a los usuarios, dibujar a mano alzada, utilizar figuras geométricas de base y cuadros de texto; pueden guardar una pizarra, cargarla nuevamente en cualquier momento y editar su contenido; adicionalmente se habilita una herramienta de chat que brinda un espacio complementario para añadir explicaciones contextuales a la sesión, todo en un entorno colaborativo.

  17. La evaluación como instrumento de formación para el aprendizaje a través de los laboratorios remotos

    OpenAIRE

    Albert Gómez, M. J.; García Pérez Calabuig, M.; G. Díaz Orueta

    2016-01-01

    [EN] The article provides information about the evaluation process that were conducted during the design of the RIPLECS instructional approach, system remote labs, evaluation methodologies and lifelong learning. The research project “Remote-labs access in Internetbased Performance-centred Learning Environment for curriculum Support” present the objective of the definition and development of an infrastructure based on European telematics for the organization ...

  18. Ciclo de vida da família e desmatamento na Amazônia: combinando informações de sensoriamento remoto com dados primários

    Directory of Open Access Journals (Sweden)

    Marcellus Marques Caldas

    2003-12-01

    Full Text Available Este artigo examina as relações entre as características sociodemográficas das famílias de pequenos produtores na Amazônia e a hipótese do ciclo de vida no processo de tomada de decisão de desmatar. A análise foi conduzida combinando informações de sensoriamento remoto e de sistema de informações geográficas com dados primários de 153 pequenos produtores estabelecidos ao longo da rodovia Transamazônica. Análises de regressões foram efetuadas juntamente com testes de autocorrelação espacial. Os resultados levaram à conclusão de que as características sociodemográficas das famílias, bem como fatores institucionais e de mercado, influenciam a tomada de decisão de uso da terra. Esses resultados permitem concluir ainda que, apesar de não serem muito populares entre os cientistas sociais brasileiros, os dados obtidos através das imagens de satélite podem ser muito úteis neste tipo de estudo. Além disso, a pesquisa aqui apresentada indica que dados sociodemográficos da família, bem como os de mercado, podem resultar em problemas de má especificação do modelo. O mesmo se aplica a modelos que não incorporem análises espaciais.This paper examines the relationships between the sociodemographic characteristics of small settlers in the Brazilian Amazon and the life cycle hypothesis in the process of deforestation. The analysis was conducted combining remote sensing and geographic data with primary data of 153 small settlers along the Transamazon Highway. Regression analyses and spatial autocorrelation tests were conducted. The results from the empirical model indicate that sociodemographic characteristics of households, as well as institutional and market factors, affect the land use decision. Although remotely sensed information are not yet very popular among Brazilian social scientists, these results confirm that they can be very useful for this kind of study. Furthermore, the research presented by this paper strongly

  19. Celulitis orbitaria como forma de presentación de la sinusitis complicada en el niño Orbital cellulitis as a way of presentation of the complicated sinusitis in the child

    National Research Council Canada - National Science Library

    Odette Pantoja Pereda; María del Carmen Luis Álvarez; Dayamí Benítez Rodríguez; Marlen Rivero González; Laura Pérez-Oliva Sánchez

    2012-01-01

    .... Las complicaciones más severas, como celulitis y abscesos periorbitarios, son raras. La celulitis orbitaria es una entidad poco frecuente, cuya importancia radica en que puede asociarse a la pérdida...

  20. USO DE FERRAMENTAS DA INTERNET NO ENSINO DO SENSORIAMENTO REMOTO NO CURSO DE GRADUAÇÃO EM ENGENHARIA AGRÍCOLA

    Directory of Open Access Journals (Sweden)

    Edilberto Bezerra de Sousa

    Full Text Available RESUMO Esta pesquisa consistiu no desenvolvimento de uma metodologia de ensino, a partir da utilização de ferramentas da INTERNET, para a disciplina de Sensoriamento Remoto I, ministrada no DEAg (Departamento de Engenharia Agrícola da UFPB (Universidade Federal da Paraíba e está vinculada ao programa da UFPB para informatização de disciplinas dos cursos de Engenharia. Nesta metodologia são abordados todos os tópicos do seu programa. Na abordagem, apesar de ser dirigida aos cursos de Engenharia Agrícola, os temas básicos e aplicações são de interesse de diversos cursos de engenharia e áreas afins. A deficiência de material didático básico para dar suporte a tal disciplina é muito grande, principalmente nos cursos de Engenharia Agrícola, que tratam de um segmento específico relacionado aos Recursos Naturais, o que motivou a realização deste trabalho que, certamente, preencherá a lacuna de um material didático ilustrado e com várias aplicações na Engenharia Agrícola. Nesta pesquisa constatou-se que a utilização da informática nos seus mais diversos modos é uma experiência que, além de estimular e familiarizar o aluno ao uso de novas ferramentas de trabalho, permite formar um engenheiro melhor preparado para as novas necessidades do mercado de trabalho. Verificou-se ainda que a metodologia de ensino desenvolvida nesta pesquisa mostrou-se eficaz no aprendizado do conteúdo da disciplina Sensoriamento Remoto I, ministrada no curso de graduação em Engenharia Agrícola da UFPB.

  1. Celulitis orbitaria como forma de presentación de la sinusitis complicada en el niño Orbital cellulitis as a way of presentation of the complicated sinusitis in the child

    OpenAIRE

    Odette Pantoja Pereda; María del Carmen Luis Álvarez; Dayamí Benítez Rodríguez; Marlen Rivero González; Laura Pérez-Oliva Sánchez

    2012-01-01

    La sinusitis aguda es un proceso inflamatorio de la mucosa de los senos paranasales, de etiología bacteriana principalmente. Es más frecuente en las edades escolares y en las épocas de mayor circulación de los virus respiratorios. Se desarrolla cuando se afecta el drenaje normal de los senos y se retienen las secreciones mucosas. Las complicaciones más severas, como celulitis y abscesos periorbitarios, son raras. La celulitis orbitaria es una entidad poco frecuente, cuya importancia radica en...

  2. Acute hypocomplementemic post-infectious glomerulonephritis as a complication of sinus-related orbital cellulitis: case report Glomerulonefrite pós-infecciosa hipocomplementêmica aguda como complicação de celulite orbitária relacionada aos seios paranasais: relato de caso

    Directory of Open Access Journals (Sweden)

    Jayter Silva Paula

    2008-08-01

    Full Text Available Group A beta-hemolytic streptococcus is the most common agent implicated in post-infectious acute glomerulonephritis. We report a case of acute poststreptococcal glomerulonephritis associated with sinus-related orbital abscess in an 11-year-old boy treated with surgical drainage and intravenous ceftriaxone and clindamycin. Twelve days after supportive measures, renal function was normalized. We also discuss this potentially severe nonsuppurative complication of orbital cellulitis caused by group A beta-hemolytic streptococcus.Os estreptococos beta-hemolíticos do grupo A são os agentes mais comumente envolvidos na glomerulonefrite aguda pós-infecciosa. Relatamos um caso de glomerulonefrite pós-estreptocócica aguda associada a um abscesso orbitário secundário à sinusite, em menino de 11 anos de idade, o qual foi tratado com ceftriaxona e clindamicina endovenosas e drenagem cirúrgica. Doze dias após tratamento de suporte, a função renal se normalizou. Também discutimos a importância desta grave e potencial complicação não supurativa das celulites orbitárias causadas pelos estreptococos beta-hemolíticos do grupo A.

  3. Orbital pseudotumor

    Science.gov (United States)

    ... Goodlick TA, Kay MD, Glaser JS, Tse DT, Chang WJ. Orbital disease and neuro-ophthalmology. In: Tasman ... 423. Review Date 8/20/2016 Updated by: Franklin W. Lusby, MD, ophthalmologist, Lusby Vision Institute, La ...

  4. Foreign body orbital cyst

    DEFF Research Database (Denmark)

    Yazdanfard, Younes; Heegard, Steffen; Fledelius, Hans C.

    2001-01-01

    Ophthalmology, penetrating orbital injury, orbital foreign body, ultrasound, computed tomography (CT), histology......Ophthalmology, penetrating orbital injury, orbital foreign body, ultrasound, computed tomography (CT), histology...

  5. Gerenciamento de serviços de TI: um estudo de caso em uma empresa de suporte remoto em Tecnologia da Informação

    Directory of Open Access Journals (Sweden)

    Charlene da Silva Leite

    2010-08-01

    Full Text Available Cada vez mais o mercado exige maior Qualidade, principalmente quando a abordagem érelacionada a TI, que é uma área dinâmica e cada vez mais vital para as empresas. Esseartigo foi elaborado com o objetivo de descrever informações relevantes ao processo decertificação NBR ISO/IEC 20000-1 com base na experiência da empresa CJHT noseguimento de Suporte Remoto ao usuário. A metodologia adotada é classificada comoqualitativa, aonde por via de uma pesquisa documental, foram realizadas críticas sobre oprocesso de implantação. Ao final do artigo são analisados os benefícios versus o esforçoempregado, de forma a concluir que há benefícios para a organização, para oscolaboradores. Ainda são relatadas as principais dificuldades encontradas durante oprocesso de certificação.

  6. Serious Game no tratamento de obesidade infantil: uma proposta de interação natural com monitoramento remoto

    OpenAIRE

    Santos, Marcio Rubens Sousa

    2014-01-01

    A quantidade de pessoas com sobrepeso vem aumentando nos últimos anos. Fatores como atenção aos hábitos alimentares e mudanças no estilo de vida são apontados como cruciais na prevenção e controle da obesidade e doenças ligadas a ela. Especialistas acreditam que tais ações são mais eficazes quando iniciadas durante a infância, e que crianças educadas em um ambiente que estimule a prática de atividades físicas acabam por se tornar adultos mais saudáveis. Porém, um grande desafio é despertar e ...

  7. Analysis system and remote monitoring of atmospheric discharges; Sistema de analisis y monitoreo remoto de descargas atmosfericas

    Energy Technology Data Exchange (ETDEWEB)

    Zabre Borgaro, Eric; Rodriguez Padilla, Ma. Consuelo [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1996-12-31

    A system for analysis and monitoring of atmospheric discharges (SAMDA (Sistema de Analisis y Monitoreo de Descargas Atmosfericas) (lightnings)) in an electronic device that subsequently transmits these data as automatic processing or by request of a user from a computer operating as a remote station, is described. Also, the characteristics of the SAMDA, its evolution, and the challenges encountered along the development of this project and comments on possible improvements to the equipment and data recordings of this nature, are described. [Espanol] Se presenta el sistema de analisis y monitoreo de descargas atmosfericas (SAMDA) utilizado en la deteccion y registro de descargas atmosfericas (rayos) en un equipo electronico que posteriormente transmite estos datos como procesamiento automatico o por peticion de un usuario desde una computadora, operando como estacion remota. Asimismo, se describen las caracteristicas del SAMDA, su evolucion, los retos encontrados a lo largo del desarrollo de este proyecto y comentarios sobre posibles mejoras a equipos y registros de datos de esta naturaleza.

  8. El Carnaval de Cádiz como generador de información, opinión y contrapoder: análisis crítico de su impacto en línea y fuera de línea

    OpenAIRE

    Sacaluga Rodríguez, Ignacio

    2014-01-01

    Tesis inédita presentada en la Universidad Europea de Madrid. Facultad de Artes y Comunicación El Carnaval de Cádiz puede considerarse un fenómeno sociológico de especial singularidad. Su evolución histórica, desde sus orígenes más remotos hasta hoy, lo ha dotado de un marcado carácter contestatario. Además, el desarrollo de sus agrupaciones (principalmente sus coros, chirigotas, comparsas y cuartetos) le diferencia de otros carnavales del mundo y lo identifica también como un fenómeno com...

  9. Sistema remoto para monitorização de ambientes refrigerados em viaturas automóveis

    OpenAIRE

    Vasconcelos, Sérgio Ricardo Martins

    2015-01-01

    Dissertação de mestrado, Engenharia Elétrica e Eletrónica (Tecnologias de Informação e Telecomunicações), Instituto Superior de Engenharia, Universidade do Algarve, 2015 Devido à constante necessidade das empresas de frotas de distribuição em aumentarem a eficiência dos seus sistemas através de processos de otimização, bem como o controlo de custos associado, os sistemas de monitorização remota e tracking de viaturas estão em franca evolução e expansão. Este trabalho, integrado no proje...

  10. Uso de sensoriamento remoto para análise ambiental do Parque Manguezal do Itacorubi, Florianópolis - SC

    OpenAIRE

    2000-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Entre as paisagens que aprensentam maior fragilidade na sua relação com o homem, os manguezais recebem impactos consideráveis, especialmente pela sua localização em terrenos inundáveis e quando receptores de efluentes dos centros urbanos. Desta forma, definiu-se como área de estudo o Parque Manguezal do Itacorubi localizado na área urbana do município de Florianópolis (SC), principalmente pelos diferentes ...

  11. Geometric orbit datum and orbit covers

    Institute of Scientific and Technical Information of China (English)

    梁科; 侯自新

    2001-01-01

    Vogan conjectured that the parabolic induction of orbit data is independent of the choice of the parabolic subgroup. In this paper we first give the parabolic induction of orbit covers, whose relationship with geometric orbit datum is also induced. Hence we show a geometric interpretation of orbit data and finally prove the conjugation for geometric orbit datum using geometric method.

  12. Modificación en la manera de calcular la energía total que producen las celdas solares de los sensores remotos de la Universidad de Alberta

    OpenAIRE

    Moya-Mora, Ana Lucía

    2015-01-01

    El artículo presente propone una mejora en la forma de calcular la cantidad de energía que producen las celdas solares de los sensores remotos construidos en la Universidad de Alberta, Edmonton, Canadá. De esta manera, se determinó que para los sitios en los que se tienen instalados los dispositivos, las celdas deben colocarse con un ángulo de 25°. Además, se planteó el cálculo de la cantidad de radiación absorbida por la cubierta del sensor, de esta manera se modificó el dato correspondiente...

  13. Classificação orientada a objeto de imagens de sensoriamento remoto em estudos epidemiológicos sobre leishmaniose visceral em área urbana

    Directory of Open Access Journals (Sweden)

    Andréa Sobral de Almeida

    2014-08-01

    Full Text Available Neste estudo, explorou-se o uso da classificação orientada a objeto de imagens de sensoriamento remoto em estudos epidemiológicos sobre leishmaniose visceral (LV em áreas urbanas. A classificação orientada a objeto foi aplicada a cenas Landsat 5 TM da cidade de Teresina, Piauí, Brasil, para obtenção de informações ambientais e temperatura. Para o período de 1993-1996, a taxa de incidência de LV nos setores censitários da cidade foi positivamente correlacionada com a área do setor censitário coberta por vegetação densa, rasteira e solo exposto e negativamente com a área coberta por água e áreas densamente ocupadas. No período de 2001-2006, foram encontradas correlações positivas com vegetação densa, rasteira, solo exposto e áreas densamente ocupadas e negativas com áreas urbanas com alguma vegetação. A temperatura da superfície terrestre foi negativamente associada à incidência de LV nos dois períodos. A classificação orientada a objeto pode ser útil para caracterizar paisagens associadas à ocorrência da LV em áreas urbanas e delimitar áreas de risco para definição de prioridades na implementação de intervenções.

  14. CLASIFICACIÓN NO SUPERVISADA DE COBERTURAS VEGETALES SOBRE IMÁGENES DIGITALES DE SENSORES REMOTOS: “LANDSAT - ETM+” NONSUPERVISED CLASSIFICATION OF VEGETABLE COVERS ON DIGITAL IMAGES OF REMOTE SENSORS: "LANDSAT - ETM+"

    Directory of Open Access Journals (Sweden)

    Mauricio Arango Gutiérrez

    2005-06-01

    Full Text Available La diversidad de especies vegetales presentes en Colombia y la falta de inventario sobre ellas hace pensar en un proceso que facilite la labor de los investigadores en estas disciplinas. Los sensores remotos satelitales como el LANDSAT ETM+ y las técnicas de inteligencia artificial no supervisadas, como los Self-Organizing Maps - SOM, podrían proveer una alternativa viable para avanzar en la obtención rápida de información que corresponda a zonas con diferentes coberturas vegetales presentes en la geografía nacional. La zona propuesta para el caso en estudio fue clasificada de forma supervisada por el método de máxima similitud en otro trabajo de investigación en ciencias forestales y se discriminaron ocho tipos de coberturas vegetales. Esta información sirvió como patrón de medida para evaluar el desempeño de los clasificadores no supervisados ISODATA y SOM. Sin embargo, la información que proveen las imágenes debió ser depurada previamente de acuerdo a los criterios de uso y calidad de los datos de manera que se utilizara la información adecuada para estos métodos no supervisados. Para esto se recurrió a varios conceptos como las estadísticas de las imágenes, el comportamiento espectral de las comunidades vegetales, las características del sensor y la divergencia promedio que permitieron definir las mejores bandas y sus combinaciones. Sobre éstas se aplicó el concepto de análisis de componentes principales que permitió reducir el número de datos conservando un gran porcentaje de la información. Sobre estos datos depurados se aplicaron las técnicas no supervisadas modificando algunos parámetros que pudieran mostrar una mejor convergencia de los métodos. Los resultados obtenidos se compararon con la clasificación supervisada a través de matrices de confusión y se concluye que no hay una buena convergencia de los métodos de clasificación no supervisada con este proceso para el caso de las coberturas vegetales

  15. Orbit analysis

    Energy Technology Data Exchange (ETDEWEB)

    Michelotti, L.

    1995-01-01

    The past fifteen years have witnessed a remarkable development of methods for analyzing single particle orbit dynamics in accelerators. Unlike their more classic counterparts, which act upon differential equations, these methods proceed by manipulating Poincare maps directly. This attribute makes them well matched for studying accelerators whose physics is most naturally modelled in terms of maps, an observation that has been championed most vigorously by Forest. In the following sections the author sketchs a little background, explains some of the physics underlying these techniques, and discusses the best computing strategy for implementing them in conjunction with modeling accelerators.

  16. TUBERCULOSIS COMO ENFERMEDAD OCUPACIONAL

    Science.gov (United States)

    Mendoza-Ticona, Alberto

    2014-01-01

    Existe evidencia suficiente para declarar a la tuberculosis como enfermedad ocupacional en diversos profesionales especialmente entre los trabajadores de salud. En el Perú están normados y reglamentados los derechos laborales inherentes a la tuberculosis como enfermedad ocupacional, como la cobertura por discapacidad temporal o permanente. Sin embargo, estos derechos aún no han sido suficientemente socializados. En este trabajo se presenta información sobre el riesgo de adquirir tuberculosis en el lugar de trabajo, se revisan las evidencias para declarar a la tuberculosis como enfermedad ocupacional en trabajadores de salud y se presenta la legislación peruana vigente al respecto. PMID:22858771

  17. Inflammation of the Orbit

    Science.gov (United States)

    ... Eye Exams, Study Finds Additional Content Medical News Inflammation of the Orbit (Inflammatory Orbital Pseudotumor) By James ... Introduction to Eye Socket Disorders Cavernous Sinus Thrombosis Inflammation of the Orbit Orbital Cellulitis Preseptal Cellulitis Tumors ...

  18. Imaging of Orbital Infections

    OpenAIRE

    Seyed Hassan Mostafavi

    2010-01-01

    Preseptal and orbital cellulitis occur more commonly in children than adults. The history and physical examination are crucial in distinguishing between preseptal and orbital cellulitis. The orbital septum delineates the anterior eyelid soft tissues from the orbital soft tissue. Infections anterior to the orbital septum are classified as preseptal cellulitis and those posterior to the orbital septum are termed orbital cellulitis. "nRecognition of orbital involvement is important not only...

  19. Orbital liposarcoma.

    Science.gov (United States)

    Borbolla-Pertierra, A M; Morales-Baños, D R; Martínez-Nava, L R; Garrido-Sánchez, G A; López-Hernández, C M; Velasco-Ramos, P

    2017-02-01

    The case is presented of a 46-year-old male with right eye proptosis and conjunctival hyperaemia, of 18 months onset. A well-defined intraconal mass was found in the computed tomography. In magnetic resonance this was hypo-intense on T1, enhanced with gadolinium and hyperintense on T2. Excisional biopsy was performed, which was reported as a well-differentiated liposarcoma in the histopathology study. Liposarcoma is a malignant adipose tissue tumour. It is very rare in the orbit, with 5 histological types, the most common being myxoid. The treatment of choice is wide surgical excision and may be accompanied with radiotherapy. As it is an infiltrative tumour, It has a high rate of recurrence. Copyright © 2016 Sociedad Española de Oftalmología. Publicado por Elsevier España, S.L.U. All rights reserved.

  20. El donjuanismo como conocimiento

    Directory of Open Access Journals (Sweden)

    Ernesto Cortés Ahumada

    1965-07-01

    Full Text Available ¡Don Juan! ¡Como un estudiante! ¡Como un infante! ¡Como un pirata! Se trata, por tanto, de pensar sobre el donjuanismo. Pero no bien acabo de escribir esta palabra, o mejor todavía, de balbucir una meditación acerca de esta perspectiva dinámica y en extremo viviente, porque aún sin saber nada de él algo de nosotros se dispara en emotivas tensiones y sensuales distensiones, cuando caigo en la cuenta de que el tema es sumamente complejo.

  1. Small Orbits

    CERN Document Server

    Borsten, L; Ferrara, S; Marrani, A; Rubens, W

    2012-01-01

    We study both the "large" and "small" U-duality charge orbits of extremal black holes appearing in D = 5 and D = 4 Maxwell-Einstein supergravity theories with symmetric scalar manifolds. We exploit a formalism based on cubic Jordan algebras and their associated Freudenthal triple systems, in order to derive the minimal charge representatives, their stabilizers and the associated "moduli spaces". After recalling N = 8 maximal supergravity, we consider N = 2 and N = 4 theories coupled to an arbitrary number of vector multiplets, as well as N = 2 magic, STU, ST^2 and T^3 models. While the STU model may be considered as part of the general N = 2 sequence, albeit with an additional triality symmetry, the ST^2 and T^3 models demand a separate treatment, since their representative Jordan algebras are Euclidean or only admit non-zero elements of rank 3, respectively. Finally, we also consider minimally coupled N = 2, matter coupled N = 3, and "pure" N = 5 theories.

  2. Updates in Orbital Tumors

    Institute of Scientific and Technical Information of China (English)

    Nila; F.Moeloek

    1993-01-01

    Orbital anatomy, the clinical features of orbital tumors, the recent development of the diagnosis and management of orbital tumors were described. The incidence of orbital tumors in Dr. Cipto Mangunkusumo Hospital in the past years were introduced. The principle of management of orbital tumors and their prognosis were discussed.

  3. El derecho como hecho o como norma

    Directory of Open Access Journals (Sweden)

    Roberto José Vernengo

    2015-10-01

    Full Text Available Para el historiador, antiguamente, y para el sociólogo, en nuestros días, el derecho es un fenómeno empírico. El derecho de una sociedad es un dato de su realidad: historiador o sociólogo tienen que buscar el derecho en alguna experiencia empírica accesible. Sin embargo, no es fácil toparse con el derecho de una sociedad, como, por caso, con el derecho argentino actual, pues no sabemos muy bien a qué datos de la realidad apuntar. Aquéllos que discernimos aparecen teñidos por alguna concepción previa que tengamos sobre qué haya de entenderse por derecho. (...

  4. Imaging of Orbital Infections

    Directory of Open Access Journals (Sweden)

    Seyed Hassan Mostafavi

    2010-05-01

    Full Text Available Preseptal and orbital cellulitis occur more commonly in children than adults. The history and physical examination are crucial in distinguishing between preseptal and orbital cellulitis. The orbital septum delineates the anterior eyelid soft tissues from the orbital soft tissue. Infections anterior to the orbital septum are classified as preseptal cellulitis and those posterior to the orbital septum are termed orbital cellulitis. "nRecognition of orbital involvement is important not only because of the threatened vision loss associated with orbital cellulitis but also because of the potential for central nervous system complications including cavernous sinus thrombosis, meningitis, and death. "nOrbital imaging should be obtained in all patients suspected of having orbital cellulitis. CT is preferred to MR imaging, as the orbital tissues have high con-trast and the bone can be well visualized. Orbital CT scanning allows localization of the disease process to the preseptal area, the extraconal or intraconal fat, or the subperiosteal space. Axial CT views allow evaluation of the medial orbit and ethmoid sinuses, whereas coronal scans image the orbital roof and floor and the frontal and maxillary sinuses. If direct coronal imaging is not possible, reconstruction of thin axial cuts may help the assessment of the orbital roof and floor. Potential sources of orbital cellulitis such as sinusitis, dental infection, and facial cellulitis are often detectable on CT imaging. "nIn this presentation, the imaging considerations of the orbital infections; including imaging differentiation criteria of all types of orbital infections are reviewed.

  5. Preseptal Cellulitis, Orbital Cellulitis, Orbital Abscess

    OpenAIRE

    Rana Altan Yaycıoğlu

    2012-01-01

    Patients with orbital infections present to our clinic usually with unilateral pain, hyperemia, and edema of the eyelids. The differentiation between preseptal and orbital cellulitis is utmost important in that the second requires hospitalization. Since in orbital cellulitis, the tissues posterior to the orbital septum are involved, signs such as conjunctival chemosis, limited eye movement, decreased vision, as well as afferent pupil defect secondary to optic nerve involvement may al...

  6. Bilateral orbital cavernous haemangiomas.

    OpenAIRE

    Fries, P D; Char, D. H.

    1988-01-01

    Simultaneous bilateral orbital lesions are rare. The differential diagnosis includes orbital pseudotumour, metastasis, leukaemia, lymphoma, Wegener's granulomatosis, and neurofibromatosis. We report what we believe to be the first case of bilateral orbital cavernous haemangiomas.

  7. Orbital and laboratory spectral data to optimize soil analysis Dados espectrais orbitais e de laboratório na otimização da análise do solo

    Directory of Open Access Journals (Sweden)

    Peterson Ricardo Fiorio

    2009-04-01

    Full Text Available Traditional soil analyses are time-consuming with high cost and environmental risks, thus the use of new technologies such as remote sensing have to be estimulated. The purpose of this work was to quantify soil attributes by laboratory and orbital sensors as a non-destructive and a non-pollutant method. The study area was in the region of Barra Bonita, state of São Paulo, Brazil, in a 473 ha bare soil area. A sampling grid was established (100 × 100 m, with a total of 474 locations and a total of 948 soil samples. Each location was georeferenced and soil samples were collected for analysis. Reflectance data for each soil sample was measured with a laboratory sensor (450 to 2,500 nm. For the same locations, reflectance data was obtained from a TM-Landsat-5 image. Multiple linear regression equations were developed for 50% of the samples. Two models were developed: one for spectroradiometric laboratory data and the second for TM-Landsat-5 orbital data. The remaining 50% of the samples were used to validate the models. The test compared the attribute content quantified by the spectral models and that determined in the laboratory (conventional methods. The highest coefficients of determination for the laboratory data were for clay content (R² = 0.86 and sand (R² = 0.82 and for the orbital data (R² = 0.61 and 0.63, respectively. By using the present methodology, it was possible to estimate CEC (R² = 0.64 by the laboratory sensor. Laboratory and orbital sensors can optimize time, costs and environment pollutants when associated with traditional soil analysis.Analises de solos tradicionais consomem tempo com alto custo e riscos ambientais. Dessa forma, o uso de novas tecnologias como o sensoriamento remoto tem sido estimulado. O objetivo do trabalho foi quantificar atributos dos solos por um método não destrutivo e não poluente utilizando sensor de laboratório e orbital. A área de estudo localiza-se na região de Barra Bonita, Brasil, com

  8. Orbital dystopia due to orbital roof defect.

    Science.gov (United States)

    Rha, Eun Young; Joo, Hong Sil; Byeon, Jun Hee

    2013-01-01

    We performed a retrospective review of patients who presented with delayed dystopia as a consequence of an orbital roof defect due to fractures and nontraumatic causes to search for a correlation between orbital roof defect size and surgical indications for the treatment thereof. Retrospective analyses were performed in 7 patients, all of whom presented with delayed dystopia due to orbital roof defects, between January 2001 and June 2011. The causes of orbital roof defects were displaced orbital roof fractures (5 cases), tumor (1 case), and congenital sphenoid dysplasia (1 case). All 7 patients had initially been treated conservatively and later presented with significant dystopia. The sizes of the defects were calculated on computed tomographic scans. Among the 7 patients, aspiration of cerebrospinal fluid, which caused ocular symptoms, in 1 patient with minimal displaced orbital roof and reconstruction with calvarial bone, titanium micromesh, or Medpor in 6 other patients were performed. The minimal size of the orbital roof in patients who underwent orbital roof reconstruction was 1.2 cm (defect height) x 1.0 cm (defect length), 0.94 cm(2). For all patients with orbital dystopia, displacement of the globe was corrected without any complications, regardless of whether the patient was evaluated grossly or by radiology. In this retrospective study, continuous monitoring of clinical signs and active surgical management should be considered for cases in which an orbital roof defect is detected, even if no definite symptoms are noted, to prevent delayed sequelae.

  9. O MAPA COMO RELATO

    Directory of Open Access Journals (Sweden)

    Renata Moreira Marquez

    2014-04-01

    Full Text Available Este ensaio propõe uma reflexão crítica sobre o mapa como modelo privilegiado de representação do espaço. Partindo da iconografia historicamente verificada com a disseminação do imaginário do globo terrestre e buscando os possíveis estratos heterotópicos ou margens de desobediência cartográfica atuantes nos mapas existentes bem como na emergência de novos mapas, aborda algumas das suas transformações históricas na tensão constantemente experimentada entre inventário e invenção, através de um conjunto selecionado de reflexões e proposições de autores vindos não da geografia mas das artes visuais e da literatura tais como Joaquín Torres-García, Georges Perec, Joan Brossa, Julio Cortázar e outros. Frente à análise da aplicabilidade do mapa como relato subjetivo e da sua aproximação com uma experiência cartográfica múltipla e diversa capaz de inventariar, nos lugares estudados, a qualidade poética da vida, o mapa ressurge, assim, como ciência das qualidades em detrimento de campo das quantidades. Propõe-se, conclusivamente, repensar a cartografia como uma plataforma científica que, mesmo nas suas origens, já guardava uma potência mítica para relatos abertos e transversais à ciência e que, no contexto atual, pode tornar-se uma plataforma de ação criativa em prol de novas sensibilidades perceptivas, novos mundos estéticos e novos movimentos prospectivos de transformação imaginativa do espaço, ampliando e complexificando o esforço de conhecer as nossas relações geográficas.

  10. El libro como performance

    OpenAIRE

    2015-01-01

    La comunidad poética Estación Pringles entabla un diálogo intrigante con el formato libro. Por una parte, su acercamiento teatral a la poesía parecería excluir la posibilidad de ver este medio como un modelo para el proyecto. Sin embargo, en su diálogo con la línea poética iniciada por Stéphane Mallarmé, esta iniciativa artística propone un concepto del libro como performance. Esta orientación es evidente, además, en la producción impresa de Estación Pringles. The poetry community Estación...

  11. O corpo como pulso

    Directory of Open Access Journals (Sweden)

    Flavia Liberman

    2010-06-01

    Full Text Available O corpo é foco de muitos estudos e intervenções. Alguns paradigmas o concebem apenas em seu aspecto sensório-motor, enquanto outros transitam prioritariamente por uma dimensão psicológica. Procurando contribuir para a formulação de outras perspectivas no campo, apresentam-se aspectos da concepção de corpo de Stanley Keleman em ressonância com os estudos de Regina Favre. A partir de cenas clínicas em grupos de seminários, podemos pensar o corpo como pulso, multimídia, multifacetado, que se (des constrói permanentemente nos encontros. Articulando experiências clínicas da autora como terapeuta ocupacional e docente da graduação e em grupos de estudos, essas concepções servem como guia para uma clínica pensada, construída e balizada pelo corpo mediante utilização de abordagens corporais para a promoção de encontros plasmados por afetos e acontecimentos, na tentativa de criar corpos que possam sustentar as intensidades vividas e permitam a observação de si, a aproximação com o outro e a produção de singularidades.

  12. O corpo como pulso

    Directory of Open Access Journals (Sweden)

    Flavia Liberman

    Full Text Available O corpo é foco de muitos estudos e intervenções. Alguns paradigmas o concebem apenas em seu aspecto sensório-motor, enquanto outros transitam prioritariamente por uma dimensão psicológica. Procurando contribuir para a formulação de outras perspectivas no campo, apresentam-se aspectos da concepção de corpo de Stanley Keleman em ressonância com os estudos de Regina Favre. A partir de cenas clínicas em grupos de seminários, podemos pensar o corpo como pulso, multimídia, multifacetado, que se (des constrói permanentemente nos encontros. Articulando experiências clínicas da autora como terapeuta ocupacional e docente da graduação e em grupos de estudos, essas concepções servem como guia para uma clínica pensada, construída e balizada pelo corpo mediante utilização de abordagens corporais para a promoção de encontros plasmados por afetos e acontecimentos, na tentativa de criar corpos que possam sustentar as intensidades vividas e permitam a observação de si, a aproximação com o outro e a produção de singularidades.

  13. Avaliação de áreas potenciais ao cultivo de biomassa para produção de energia e uma contribuição de sensoriamento remoto e sistemas de informações geográficas Assessment of potential areas to biomass cultivation for energy production and a contribution of remote sensing and geographic information systems

    Directory of Open Access Journals (Sweden)

    Adalberto K. Miura

    2011-06-01

    Full Text Available A humanidade sempre utilizou a biomassa para fins energéticos, porém com o aumento da demanda, ameaças à segurança energética e os danos para o ambiente e para a saúde decorrentes da utilização dos combustíveis fósseis, a importância desta fonte renovável vem sendo resgatada. Neste cenário, o planejamento agroenergético passa a ser de grande importância para países tropicais como o Brasil, pois permite viabilizar a produção de biomassa para energia onde esta é requerida, de forma sustentável, sem deixar de considerar os aspectos sociais e ambientais. Desta forma, o presente artigo tem por objetivo apresentar importantes questões relacionadas ao planejamento energético regional, como forma de contribuir para soluções e políticas públicas relacionadas à produção de energia de biomassa. Ademais, é apresentada a contribuição das técnicas de Sensoriamento Remoto e Sistemas de Informações Geográficas para avaliações de áreas potenciais ao cultivo de culturas bioenergéticas, além de um modelo conceitual que demonstra como essas técnicas podem constituir-se em ferramentas de apoio à tomada de decisão estratégica nesta área de bioenergia. Adicionalmente, algumas dificuldades e limitações para o planejamento territorial e agroenergético também foram relacionadas.Since early times, the human kind has been using the biomass for energy purposes. However, the current increasing energy demand can endanger the energy security of the nations and, as well, could put in risk the planet's environmental quality and human health. Thus, by the issues concern about the fossil fuels utilization, the importance of renewable energy sources is being rescued. In this scenario, the biomass energy planning becomes very important to tropical countries, like Brazil, because it would allow stimulating the production of biomass for energy where it is required, but in a sustainable way, considering the social and environmental

  14. Preseptal Cellulitis, Orbital Cellulitis, Orbital Abscess

    Directory of Open Access Journals (Sweden)

    Rana Altan Yaycıoğlu

    2012-12-01

    Full Text Available Patients with orbital infections present to our clinic usually with unilateral pain, hyperemia, and edema of the eyelids. The differentiation between preseptal and orbital cellulitis is utmost important in that the second requires hospitalization. Since in orbital cellulitis, the tissues posterior to the orbital septum are involved, signs such as conjunctival chemosis, limited eye movement, decreased vision, as well as afferent pupil defect secondary to optic nerve involvement may also be observed. Prompt intravenous antibiotic treatment should be started, and surgical drainage may be performed if patient shows failure to improve in 48 hours despite optimal management. Without treatment, the clinical course may progress to subperiosteal or orbital abscess, and even to cavernous sinus thrombosis. (Turk J Ophthalmol 2012; 42: Supplement 52-6

  15. COMO? PALETAS MEXICANAS BRASILEIRAS?

    Directory of Open Access Journals (Sweden)

    Daniela Maria Alves Chaud

    2016-03-01

    Full Text Available As informações sobre alimentação estão mais acessíveis e democráticas. As tendências alimentares são inspiradas por diversos fatores, mas sempre estão associados à moda, mídia e como forma de conjectura de um estilo de vida. Há pouco tempo, as grandes cidades brasileiras foram invadidas por uma nova mania: as paletas mexicanas, que, na verdade, não são “tão mexicanas”. Esses sorvetes apresentam qualidades organolépticas marcantes, em virtude, entre outros fatores, ao alto teor de açúcar e, em alguns casos, de gorduras. A concepção gourmetizada e natural dessa iguaria, seu custo e as propriedades nutricionais são peculiares e, aparentemente, um modismo. Esse trabalho teve como objetivo conhecer a composição desses produtos, a partir das informações nutricionais contidas nos sites das empresas produtoras, bem como as suas peculiaridades e concepções. Apesar da conotação natural e gastronômica, alto valor calórico, gorduras (especialmente na versão recheada sabor brigadeiro e elevadas quantidades de açúcares, foram encontrados, em média, por unidade: 207,2 Kcal; 38,4g de carboidratos; 3,9g de proteínas e 5,3g de gorduras. Uma rica ênfase na cultura mexicana, religiosidade e identidade visual marcante foram identificadas nos sites dos produtos pesquisados.

  16. COMO ANDAR SEM POESIA?

    Directory of Open Access Journals (Sweden)

    Angela Fronckowiak

    2008-11-01

    Full Text Available O artigo reflete sobre a fruição do gênero poético por crianças ainda não alfabetizadas a partir de momentos compartilhados com elas no cotidiano de escolas de Educação Infantil. Essa vivência, vinculada ao projeto de pesquisa Poesia e infância1, demonstrou a relevância de possibilitar às crianças um contato intenso com a poesia, texto singular que as capacita a expressar, na sua linguagem, o modo como interagem com o outro e com o mundo. Através de encontros semanais com crianças de 4 a 6 anos de duas escolas da região do Vale do Rio Pardo/RS, foi possível perceber uma extrema abertura da infância para os jogos vocabulares e sonoros. Na continuidade da pesquisa, pudemos estudar as características textuais mais valorizados pelas crianças na escuta de textos poéticos. Uma hipótese era a de que a audição regular de poemas potencializava a repercussão e a ressonância, aspectos apontados por Gaston Bachelard como intrínsecos ao devaneio poético, experiência oportunizada pela leitura/audição da poesia e que faculta ao leitor encontrar “um não-eu meu que me permite viver minha confiança de estar no mundo” (BACHELARD, 1988, p. 132. Ancorado nos resultados obtidos, este texto defende a rima e o discurso predominante do poema como fatores essenciais para os pequenos experimentarem a ressonância poética.

  17. El docente como investigador

    OpenAIRE

    Corrales Sánchez, Olga; Jiménez Carrillo, María de los Ángeles

    2009-01-01

    En el campo de la docencia se presenta a menudo un gran abismo entre teoría y práctica. Los docente en su mayoría consideran que la teoría y la investigación tienen muy poca la relación con su quehacer diario.El propósito de este trabajo es el de presentar algunas ideas acerca del rol del docente como investigador. Es del conocimiento de las autoras el temor y la preocupación que expresan lo maestros y profesores ante al posibilidad de realizar investigaciones sobre su trabajo en el aula.Segú...

  18. Licopeno como agente antioxidante

    OpenAIRE

    Najua Juma Ismail Esh Shami; Emília Addison Machado Moreira

    2004-01-01

    Este trabalho constitui uma revisão de dados científicos sobre o consumo de licopeno e sua ação como fator antioxidante. O licopeno é considerado o carotenóide que possui a maior capacidade seqüestrante do oxigênio singlete. Radicais livres agem continuamente no organismo, podendo desencadear danos celulares e serem os responsáveis pelo desenvolvimento de câncer e certas doenças crônicas. Estudos mostram que o licopeno protege moléculas de lipídios, lipoproteínas de baixa densidade, proteínas...

  19. La democracia como dictadura

    OpenAIRE

    Perez Soto, Carlos

    2015-01-01

    En este ensayo expongo una radical desmitificación de la imagen que se tiene de la dictadura chilena de Augusto Pinochet Ugarte, que es vista habitualmente como un período de terror uniforme y aplastante, que habría asfixiado todo protagonismo popular. A partir de la distinción de fases en los estilos represivos y en la respuesta popular, propongo que esta imagen ha sido construida artificialmente para encubrir la continuidad histórica entre la dictadura de Pinochet y el actual régimen democr...

  20. Lunar Orbiter Photo Gallery

    Data.gov (United States)

    National Aeronautics and Space Administration — The Lunar Orbiter Photo Gallery is an extensive collection of over 2,600 high- and moderate-resolution photographs produced by all five of the Lunar Orbiter...

  1. ASC Champ Orbit Model

    DEFF Research Database (Denmark)

    Riis, Troels; Jørgensen, John Leif

    1999-01-01

    This documents describes a test of the implementation of the ASC orbit model for the Champ satellite.......This documents describes a test of the implementation of the ASC orbit model for the Champ satellite....

  2. Polygons in billiard orbits

    CERN Document Server

    Don, Henk

    2011-01-01

    We study the geometry of billiard orbits on rectangular billiards. A truncated billiard orbit induces a partition of the rectangle into polygons. We prove that thirteen is a sharp upper bound for the number of different areas of these polygons.

  3. Traumatic transconjunctival orbital emphysema.

    OpenAIRE

    Stroh, E M; Finger, P T

    1990-01-01

    Orbital emphysema can be produced by trans-conjunctival migration of air from a high pressure airgun. In an industrial accident an 8 mm conjunctival laceration was produced in the superior fornix which acted as a portal of entry for air into the subconjunctival, subcutaneous, and retrobulbar spaces. Computed tomography revealed no evidence of orbital fracture and showed that traumatic orbital emphysema occurred without a broken orbital bone.

  4. Estimativa de estrutura biofísica florestal de Mata Atlântica em áreas declivosas por meio de sensores remotos

    OpenAIRE

    Jomar Magalhães Barbosa

    2013-01-01

    O mapeamento da estrutura florestal em escala de paisagem nos permite avaliar como as florestas respondem aos impactos da ação humana e a mudanças nas condições ambientais. Neste contexto, a tese tem como objetivo elaborar modelos de estimativa de biomassa acima do solo e fechamento de dossel utilizando imagens de satélite, em diferentes estágios de sucessão de Mata Atlântica localizada em área com complexidade topográfica. Para alcançar este objetivo geral, temos dois objetivos específicos: ...

  5. Aprendizaje como reconfiguracion de agencia

    National Research Council Canada - National Science Library

    Larreamendy Joerns, Jorge

    2011-01-01

    En este articulo se ofrece una perspectiva sobre el aprendizaje como cambio en la identidad, tomando como punto de referencia la teoria de la participacion periferica legitima (PPL) de Lave y Wenger (1991...

  6. Introducing Earth's Orbital Eccentricity

    Science.gov (United States)

    Oostra, Benjamin

    2015-01-01

    Most students know that planetary orbits, including Earth's, are elliptical; that is Kepler's first law, and it is found in many science textbooks. But quite a few are mistaken about the details, thinking that the orbit is very eccentric, or that this effect is somehow responsible for the seasons. In fact, the Earth's orbital eccentricity is…

  7. O ensaio como narrativa

    Directory of Open Access Journals (Sweden)

    Pedro Duarte

    2016-02-01

    Full Text Available O artigo tenta demonstrar que todos os textos, mesmo aqueles cuja natureza é teórica, têm alguma forma de narrativa. Nem sempre são personagens que os ocupam, podem ser ideias, mas mesmo assim há um enredo conceitual que se passa. Modernamente, a forma dessa narrativa foi sobretudo o sistema, com a pretensão totalizadora presente, por exemplo, na filosofia de Hegel. Contemporaneamente, porém, a forma do ensaio – surgida ainda na era moderna – ganha destaque por sua forma descontínua de narrar. O objetivo do artigo é apontar que, se o ensaio é uma forma, como explicitaram Lukács, Benjamin e Adorno, ele é também uma forma de narrar – ainda que de narrar conceitualmente objetos da cultura.

  8. Racismo como metaenquadre

    OpenAIRE

    2015-01-01

    RESUMO Este artigo pretende discutir questões relativas ao racismo tendo como lastro principalmente contribuições da psicologia social. Para tanto, faz menção a dois conceitos. São eles: enquadre e metaenquadre. O primeiro foi teorizado pelo psicólogo social José Bleger e o segundo é uma ampliação desse e foi conceituado por René Kaës, teórico da psicanálise dos laços sociais. O artigo finaliza-se com situações que envolvem processos socioculturais, histórico-educacionais que trazem à baila p...

  9. La identidad como performatividad

    Directory of Open Access Journals (Sweden)

    Andrés Felipe Castelar

    2008-12-01

    Full Text Available La presión social por constituir una forma indentitaria que sea acorde con el referente biológico es de origen histórico y se encuentra al servicio de prácticas de control y dominación social. Este artículo presenta una discusión sobre el lugar actual de la idea de identidad, especialmente en el plano de la sexualidad. Para esto recurre a la tesis de la filósofa Judith Butler, quien propone desde una visión deconstructivista y post-estructuralista una nueva definición de idenridad en términos de la iteración performativa. La identiclad es entendida entonces como una exigencia de inteligibiliclacl ante la sociedad, la cual limita las posibiliclades de expresión sexual.

  10. La persona como creatura

    OpenAIRE

    Emmanuel Housset

    2010-01-01

    El artículo de Emmanuel Housset implica un esfuerzo de rehabilitación del concepto «persona» para la filosofía contemporánea y la fenomenología. Para ello el autor busca mostrar cómo poco a poco «persona» tomó otra significación que la de «personaje» o sujeto de derecho. Es en autores como san Agustín y santo Tomás de Aquino que se halla un acceso diferente que pone el énfasis más bien en su carácter relacional y responsivo de la persona, antes que en su dimensión autónoma y autotélica. Tal d...

  11. El inquisidor como profesor

    Directory of Open Access Journals (Sweden)

    Adriano PROSPERI

    2009-12-01

    Full Text Available Giovanni Botero, en una célebre página de su Ragion di stato, se detuvo sobre el tema de la fuerza de la religión en los gobiernos. Esta función de la religión cristiana —para Botero, católica— es garante del orden público y se presenta también como opuesta a la generadora de desorden de Lutero y Calvino, quienes siembran por todo cizañas y revoluciones de estados y ruinas de los reinos. Estamos en los orígenes del esquema historiografía de la periodización de la Edad Moderna que confió precisamente a la Reforma el papel de nodriza de las revoluciones que nacieron en Europa.

  12. Painless orbital myositis

    Directory of Open Access Journals (Sweden)

    Rahul T Chakor

    2012-01-01

    Full Text Available Idiopathic orbital inflammation is the third most common orbital disease, following Graves orbitopathy and lymphoproliferative diseases. We present a 11 year old girl with 15 days history of painless diplopia. There was no history of fluctuation of symptoms, drooping of eye lids or diminished vision. She had near total restricted extra-ocular movements and mild proptosis of the right eye. There was no conjunctival injection, chemosis, or bulb pain. There was no eyelid retraction or lid lag. Rest of the neurological examination was unremarkable.Erythrocyte sedimentation rate was raised with eosinophilia. Antinuclear antibodies were positive. Liver, renal and thyroid functions were normal. Antithyroid, double stranded deoxyribonucleic acid and acetylcholine receptor antibodies were negative. Repetitive nerve stimulation was negative. Magnetic resonance imaging (MRI of the orbit was typical of orbital myositis. The patient responded to oral steroids. Orbital myositis can present as painless diplopia. MRI of orbit is diagnostic in orbital myositis.

  13. Orbital fractures: a review

    Directory of Open Access Journals (Sweden)

    Jeffrey M Joseph

    2011-01-01

    Full Text Available Jeffrey M Joseph, Ioannis P GlavasDivision of Ophthalmic Plastic and Reconstructive Surgery, Department of Ophthalmology, School of Medicine, New York University, New York, NY, USA; Manhattan Eye, Ear, and Throat Hospital, New York, NY, USAAbstract: This review of orbital fractures has three goals: 1 to understand the clinically relevant orbital anatomy with regard to periorbital trauma and orbital fractures, 2 to explain how to assess and examine a patient after periorbital trauma, and 3 to understand the medical and surgical management of orbital fractures. The article aims to summarize the evaluation and management of commonly encountered orbital fractures from the ophthalmologic perspective and to provide an overview for all practicing ophthalmologists and ophthalmologists in training.Keywords: orbit, trauma, fracture, orbital floor, medial wall, zygomatic, zygomatic complex, zmc fracture, zygomaticomaxillary complex fractures 

  14. La persona como creatura

    Directory of Open Access Journals (Sweden)

    Emmanuel Housset

    2010-01-01

    Full Text Available El artículo de Emmanuel Housset implica un esfuerzo de rehabilitación del concepto «persona» para la filosofía contemporánea y la fenomenología. Para ello el autor busca mostrar cómo poco a poco «persona» tomó otra significación que la de «personaje» o sujeto de derecho. Es en autores como san Agustín y santo Tomás de Aquino que se halla un acceso diferente que pone el énfasis más bien en su carácter relacional y responsivo de la persona, antes que en su dimensión autónoma y autotélica. Tal dimensión aparece, según Housset, junto con la idea de persona como creatura y en oposición a la de individuo racional dueño de sí. La dimensión afectiva, la personalidad despertada por las diversas figuras de la alteridad son algunas de las dimensiones de la persona que examina el autor a partir del examen de la carne, las pasiones, la memoria, la historicidad y el amor alteridad.Emmanuel Housset's paper is an effort to revitalize the concept of 'person' for contemporary philosophy and phenomenology To this end the author looks to show how little by little the understanding of 'person' took on a different meaning to that of 'character' or "right bearing individual". It is in authors such as St. Augustine and St. Thomas Aquinas that a different approach is found, one that puts emphasis on the relational and responsive character of a person, rather than on the autonomous and auto telic dimension. According to Housset, such a dimension appears together with the idea of the person as a creation, and in opposition to the idea of the rational individual, that is his own master. The emotional dimension and the personality that is awoken by the many figures of alterity are some of the dimensions of the person that the author analyzes, based on examining the flesh, passions, memory historicity and love.

  15. Modificación en la manera de calcular la energía total que producen las celdas solares de los sensores remotos de la Universidad de Alberta

    Directory of Open Access Journals (Sweden)

    Ana Lucía Moya-Mora

    2014-12-01

    Full Text Available El artículo presente propone una mejora en la forma de calcular la cantidad de energía que producen las celdas solares de los sensores remotos construidos en la Universidad de Alberta, Edmonton, Canadá. De esta manera, se determinó que para los sitios en los que se tienen instalados los dispositivos, las celdas deben colocarse con un ángulo de 25°. Además, se planteó el cálculo de la cantidad de radiación absorbida por la cubierta del sensor, de esta manera se modificó el dato correspondiente a la cantidad de radiación luminosa total que llega a las celdas y se propone agregar estas fórmulas al algoritmo utilizado para calcular la energía total que estas producen. Por último, se señalaron los cambios generados en el cálculo de la cantidad de energía total a raíz de las modificaciones anteriores.

  16. CONSTRUÇÃO DE SÉRIES TEMPORAIS DE EVAPOTRANSPIRAÇÃO REAL POR SENSORIAMENTO REMOTO USANDO REGRESSÃO LINEAR: ESTUDO DE CASO NA BACIA DO RIO PRETO –DF

    Directory of Open Access Journals (Sweden)

    Morris Scherer Warren

    2012-10-01

    Full Text Available Estimativas remotas de evapotranspiração real têm sido utilizadas no monitoramento do balanço hídrico de bacias hidrográficas. Diferentes métodos têm sido empregados para a estimativa da evapotranspiração por sensoriamento remoto, incluindo métodos de bases físicas que utilizam a equação de balanço de energia. Mas o processamento da equação de balanço de energia é complexo e operacionalmente não eficiente. O objetivo do presente artigo é apresentar um procedimento que utiliza regressão linear para estimar a evapotranspiração real em diferentes imagens do sensor Moderate Resolution Imaging Spectroradiometer (MODIS, tornando mais ágil a construção de uma série temporal de evapotranspiração. A utilização de regressão linear, conjuntamente com o emprego da equação de balanço de energia em uma imagem de referência, se mostrou um procedimento viável, com erro máximo de 6% em todas as imagens analisadas.

  17. El signo como emblema

    Directory of Open Access Journals (Sweden)

    Sáez, Carlos

    2003-06-01

    Full Text Available The aim of this article is to study the signs and symbols that appear in the hispanic medieval documents and manuscripts. These signs and symbols have usually been considered simply as mere elements to validate the charters. However, these alements were useful as a mean of visual communication between the high classes, able to generate charters, and the rest of medieval society—the majority illiterate— who received those charters. Because of their inability of understand an alphabetical code, they needed the graphic help to comprehend the message. Besides this, the article deals with non diplomatic signs and their function.

    Este artículo se centra en los signos o símbolos presentes en los documentos y manuscritos medievales hispanos, que habitualmente han sido tratados como meros elementos de validación de los diplomas. Pero estos elementos servían también de nexos de comunicación visual entre las clases poderosas, capaces de producir escritos, y los demás miembros de la sociedad medieval, receptores y destinatarios de tales escritos, en su mayoría analfabetos. Precisamente por esta razón, su incapacidad de descifrar un código alfabético, necesitan de auxilio gráfico para acercarse a la comprensión del mensaje. Asimismo, tratamos de los signos no diplomáticos y de su función.

  18. Arte como espelho

    Directory of Open Access Journals (Sweden)

    Pedro Süssekind

    2016-12-01

    Full Text Available Este artigo tem como ponto de partida o exemplo da relação espelhada entre um livro e uma pintura de mesmo nome: o retrato que Lucian Freud fez do crítico de arte Martin Gayford e o diário que esse crítico escreveu sobre seu retratista, ambas as obras chamadas Homem com cachecol azul. A partir do exemplo, discuto a metáfora do espelho para caracterizar a arte, recorrendo para isso à teoria da representação artísticas elaborada pelo filósofo norte-americano Arthur Danto no artigo “O mundo da arte”, de 1964, e no primeiro capítulo do livro A transfiguração do lugar-comum, de 1981. Recorro, por fim, a dois exemplos artísticos de espelhamento na representação analisados por Danto em O abuso da beleza, de 2003, um quadro holandês do século dezessete e um poema de Rainer Maria Rilke.

  19. El riesgo como oportunidad

    Directory of Open Access Journals (Sweden)

    Daniela Gargantini

    2003-01-01

    Full Text Available Durante los últimos años el crecimiento mundial de catástrofes naturales ha ido en franco aumento. Sin embargo, desde un enfoque sistémico puede verificarse que la gran mayoría de los desastres se origina en los países en desarrollo (entre ellos los latinoamericanos, siendo las pérdidas en ellos significativamente más altas que en los países industrializados. Bajo esta postura los desastres no son sólo naturales sino socio- naturales, enfatizando la estrecha relación de causalidad entre modelos de desarrollo y urbanización y procesos de generación de riesgos, al incrementar la vulnerabilidad de los sectores más desprotegidos. El desastre pone en evidencia así una situación (la pobreza y segregación urbana ya existente, pero no considerada hasta el momento de la catástrofe. Frente a este panorama el desastre aparece como oportunidad que precipita tres catalizadores de políticas habitacionales: tierra, asistencia técnica y financiamiento, incrementando la celeridad y la creatividad de las respuestas. El interrogante que surge es por qué esperar el desastre para ponerlos en marcha, cuando ninguno de ellos es estrictamente dependiente de la situación de riesgo, sino sujeto de luchas de poder.

  20. como fuentes mutuas

    Directory of Open Access Journals (Sweden)

    Gabriel Morales Hernández

    2006-01-01

    Full Text Available En este artículo, el autor analiza, a partir de la antropología filosófica de Martín Heidegger y de la filosofía ilustrada de Immanuel Kant, la postura del filósofo francés Étienne Balibar en torno a la categoría de ciudadanía como base para esbozar una antropología filosófica renovada. A partir de la concepción kantiana de ciudadanía, Balibar construye una propuesta de antropología filosófica estructurada alrededor de tres pares de polos: el par hombresujeto, el par subjectus-subjectum y el par cosmos-polis. El autor va mostrando, a lo largo del trabajo, la manera en que la categoría «ciudadanía» articula cada uno de estos pares de términos y concluye con algunas consideraciones sobre las ventajas de la propuesta balibariana.

  1. Endomarketing: como diferencial competitivo

    Directory of Open Access Journals (Sweden)

    Karin Birck

    2013-05-01

    Full Text Available Atualmente, com a profissionalização das empresas e com a grande concorrência no mercado, observa-se uma demanda cada vez maior de gestores comprometidos com o bem-estar pessoal e profissional de seus colaboradores. E, com esse intuito, de apresentar algumas idéias básicas de gestão voltadas à aplicação nas mais diversas técnicas de Endomarketing. Demonstra assim, a importância da utilização de feedback, tanto por parte dos colaboradores quanto dos gestores, destacando a importância de trabalhos de motivação, do clima organizacional favorável e de uma comunicação interna eficaz e a necessidade ímpar de tratar o colaborador como o diferencial dentro de uma empresa. Desta forma, foi realizada uma pesquisa bibliográfica que auxiliará e dará subsídios que lhe permitam retribuir em ações e atitudes de sucesso e, também, fazer um confronto de idéias, onde os autores apresentam suas mais diversas opiniões. Contudo, valendo-se, muitas vezes, de narrativas de experiências de outros gestores e até mesmo de suas próprias, tirando cada um suas próprias conclusões.

  2. The Exoplanet Orbit Database

    CERN Document Server

    Wright, Jason T; Marcy, Geoffrey W; Han, Eunkyu; Feng, Ying; Johnson, John Asher; Howard, Andrew W; Valenti, Jeff A; Anderson, Jay; Piskunov, Nikolai

    2010-01-01

    We present a database of well determined orbital parameters of exoplanets. This database comprises spectroscopic orbital elements measured for 421 planets orbiting 357 stars from radial velocity and transit measurements as reported in the literature. We have also compiled fundamental transit parameters, stellar parameters, and the method used for the planets discovery. This Exoplanet Orbit Database includes all planets with robust, well measured orbital parameters reported in peer-reviewed articles. The database is available in a searchable, filterable, and sortable form on the Web at http://exoplanets.org through the Exoplanets Data Explorer Table, and the data can be plotted and explored through the Exoplanets Data Explorer Plotter. We use the Data Explorer to generate publication-ready plots giving three examples of the signatures of exoplanet migration and dynamical evolution: We illustrate the character of the apparent correlation between mass and period in exoplanet orbits, the selection different biase...

  3. O direito como imperativo

    Directory of Open Access Journals (Sweden)

    Cloter Miglioriani

    1988-08-01

    Full Text Available We have examined one of the facets which Law presents to society, looking at the theme through a brief history of Law, in which Roman Law stands out, up to modem times, comparing current juridical systems such as the Continental System, Common Law, and Soviet Law. We have looked at Law from the viewpoint of society 's need to have basic mies for living together, with the juridical ruZe being one of the most important. We have highlighted the views of Hart and Kelsen on the foundations of the validity of Law. We have also considered the obligatoriness of Law; giving the point of view of tadbruch who, explaining his ''Theory of the Obligatoriness of Law ", concluded that the obligatoriness of Law can only be withdraw when there is a Clash between morals, law, use and social conventions. We have looked at the notion of the imperativeness of Law the central theme of the work -drawing on the views of Miguel Reale, for whom the juridical nonn cannot be reduced to a "command of a volitional nature", but rather the obligatory character of the juridical nonn arises from the pressure of social values. Del Vecchio, who is also quoted, recognized that imperativeness exists in the juridical norm, whether it is preceptive (a positive command or permissive. Also mentioned is the opinion of Tercio Sampaio Ferraz, for whom the juridical norm has imperativeness to the extent that the imposition of behaviour is unconditionally guaranteed. Foi feita a abordagem de uma das facetas com que o Direito se apresenta à sociedade, enfocando o tema a partir de um brevíssimo histórico do Direito, onde revela a fase romana, até os períodos modernos, com comparações dos sistemas jurídicos hodiernos, como o sistema continental, o da Commum Law e o soviético. Foi enfocado o Direito em face da necessidade sociedade em ter básicas de convivência, despontando a regra jurídica como das mais importantes. Foi dado destaque às posições de Hart e Kelsen, sobre os

  4. Ouabaina como Hormona

    Directory of Open Access Journals (Sweden)

    J. Hernando Ordoñez

    1996-04-01

    Full Text Available

    Comentario sobre su origen endógeno y sus aplicaciones terapéuticas

    Pocas drogas han sido más estudiadas que el grupo de los digitálicos, estrofantinas y ouabaina, cuyo estudio es objeto del presente trabajo.

    La ouabaina empezó a ser estudiada desde el siglo pasado. La primera referencia conocida corresponde a Pelikan, 1865 (1, como veneno que empleaban para las flechas en Gabón (Africa. (.

    (. Vinieron luego los trabajos de Fraser, 1869, (2, 3, 6, Polaillon, 1871 (4, Amaud, 1888 (5, Vaquez y Lutembacher, 1917 (7, Stoll, 1939 (8, Lapicque, 1929 (9, Wiggers, 1927 (10, Ytantos otros (11, 12, 13. En la obra de Kisch (14 aparecen más de 700 referencias bibliográficas sobre el particular.

    Ouabaina de origen endógeno. Purificación
    Durante muchos años se conoció la ouabaina como de origen vegetal, elaborada por las plantas Strophanthus Glaber(k-estrofantina,AcocantheraOuabaio(Ouabaina yStrophanthus Kombe (k-estrofantina y kestrofantósido. Una propiedad común a todos los digitálicos, estrofantina y ouabaina es que todos son inhibidores de la bomba de Na-K, encargada de regular la salida de Na y la entrada de K celular.

    Estudiando los inhibido res de esta bomba han encontrado en años recientes resultados extraordinarios en relación con el origen endógeno de algunos de estos inhibidores, entre ellos la ouabaina. Por considerarlos de extrema importancia y actualidad científica me permito citar algunos de ellos. Hamlyn y Manunta (15, 16, 17, 18, Y 19 hicieron estudios sobre el particular y lograron identificar en el plasma humano un compuesto igual a la ouabaina. Estos hallazgos fueron confirmados después por otros autores (20, 21, 22, 23 Y24.

    Ham bl yn (19 da varios argumentos que ponen en evidencia que el compuesto químico encontrado es ouabaina pura, y, lo que es más interesante, que tiene un origen endógeno. a Por espectroscopia de alta resoluci

  5. Preseptal and orbital cellulitis

    OpenAIRE

    Emine Akçay; Gamze Dereli Can; Nurullah Çağıl

    2014-01-01

    Preseptal cellulitis (PC) is defined as an inflammation of the eyelid and surrounding skin, whereas orbital cellulitis (OC) is an inflammation of the posterior septum of the eyelid affecting the orbit and its contents. Periorbital tissues may become infected as a result of trauma (including insect bites) or primary bacteremia. Orbital cellulitis generally occurs as a complication of sinusitis. The most commonly isolated organisms are Staphylococcus aureus, Streptococcus pneumoniae, S. epid...

  6. Orbital inflammation: Corticosteroids first.

    Science.gov (United States)

    Dagi Glass, Lora R; Freitag, Suzanne K

    2016-01-01

    Orbital inflammation is common, and may affect all ages and both genders. By combining a thorough history and physical examination, targeted ancillary laboratory testing and imaging, a presumptive diagnosis can often be made. Nearly all orbital inflammatory pathology can be empirically treated with corticosteroids, thus obviating the need for histopathologic diagnosis prior to initiation of therapy. In addition, corticosteroids may be effective in treating concurrent systemic disease. Unless orbital inflammation responds atypically or incompletely, patients can be spared biopsy.

  7. Geometric orbit datum and orbit covers

    Institute of Scientific and Technical Information of China (English)

    LIANG; Ke(

    2001-01-01

    [1]Vogan, D. , Dixmier algebras, sheets and representation theory (in Actes du colloque en I' honneur de Jacques Dixmier),Progress in Math. 92, Boston: Birkhauser Verlag, 1990, 333-397.[2]McGovern, W., Dixmier Algebras and Orbit Method, Operator Algebras, Unitary Representations and Invariant Theory,Boston: Birkhauser, 1990, 397-416.[3]Liang, K. , Parabolic inductions of nilpotent geometric orbit datum, Chinese Science Bulletin (in Chinese) , 1996, 41 (23):2116-2118.[4]Vogan, D., Representations of Real Reductive Lie Groups, Boston-Basel-Stuttgart: Birkhauser, 1981.[5]Lustig, G., Spaltenstein, N., Induced unipotent class, J. London Math. Soc., 1997, 19. 41-52.[6]Collingwood, D. H. , McGovern, W. M. , Nilpotent Orbits in Semisimple Lie Algebras, New York: Van Nostremt Reinhold,1993.

  8. Family of Orbiters

    Science.gov (United States)

    2008-01-01

    This image shows the paths of three spacecraft currently in orbit around Mars, as well as the path by which NASA's Phoenix Mars Lander will approach and land on the planet. The t-shaped crosses show where the orbiters will be when Phoenix enters the atmosphere, while the x-shaped crosses show their location at landing time. All three orbiters, NASA's Mars Reconnaissance Orbiter, NASA's Mars Odyssey and the European Space Agency's Mars Express, will be monitoring Phoenix during the final steps of its journey to the Red Planet. Phoenix will land just south of Mars's north polar ice cap.

  9. Casamento como contrato. Brasil - Portugal

    OpenAIRE

    Souza, Carla Giselle Neves

    2014-01-01

    O casamento como contrato, trata-se de um dos negócios jurídicos mais celebrados, assim como, também é dos negócios jurídicos mais minuciosos, e que, por algumas vezes, ou mais que isso, é, de certa forma, ignorado os efeitos que advém do mesmo contrato. O casamento como contrato, assim como os demais negócios jurídicos, também domina o princípio da autonomia privada. Contudo, existe uma certa imperatividade na lei, uma vez que, no contrato de casamento pode-se escolher o regim...

  10. Diseño de un sistema de control, automatización y monitoreo remoto para viviendas o negocios utilizando multimedia sobre ip

    OpenAIRE

    Molina, Maria Belen; Montesdeoca, Daniel J.; Leyton, Edgar

    2009-01-01

    El aumento constante en la demanda de mejorar la calidad de vida de las personas ha exigido un desarrollo tecnológico continuo. Se han diseñado diferentes artefactos que día a día pasan de ser lujos a necesidades. Dos de estos adelantos tecnológicos fueron las ideas del control automático y del control automático. Ambos se usan en diversos sistemas en la actualidad como son los acondicionadores de aire (control automático para establecer temperaturas en un ambiente, y ya la mayoría tienen...

  11. Estudio, diseño y construcción de un hovercraft por control remoto de 0,63 metros de eslora

    OpenAIRE

    Reina Jerez, Kevin; Peiró Vispe, Sergi

    2016-01-01

    El proyecto consistirá en una revisión bibliográfica sobre la historia, funcionamiento, aplicaciones y usos de los hovercraft, así como de los elementos que lo componen, con el objetivo de adquirir los conocimientos necesarios para diseñar y construir una maqueta radio control propia. El hovercraft tendrá una eslora de 0,63 m de longitud y se realizaran pruebas con diferentes materiales para escoger el más adecuado para su funcionamiento. Se buscarán materiales lo más ligeros posibles ya que ...

  12. Congenital orbital encephalocele, orbital dystopia, and exophthalmos.

    Science.gov (United States)

    Hwang, Kun; Kim, Han Joon

    2012-07-01

    We present here an exceedingly rare variant of a nonmidline basal encephalocele of the spheno-orbital type, and this was accompanied with orbital dystopia in a 56-year-old man. On examination, his left eye was located more inferolaterally than his right eye, and the patient said this had been this way since his birth. The protrusion of his left eye was aggravated when he is tired. His naked visual acuity was 0.7/0.3, and the ocular pressure was 14/12 mm Hg. The exophthalmometry was 10/14 to 16 mm. His eyeball motion was not restricted, yet diplopia was present in all directions. The distance from the midline to the medial canthus was 20/15 mm. The distance from the midline to the midpupillary line was 35/22 mm. The vertical dimension of the palpebral fissure was 12/9 mm. The height difference of the upper eyelid margin was 11 mm, and the height difference of the lower eyelid margin was 8 mm. Facial computed tomography and magnetic resonance imaging showed left sphenoid wing hypoplasia and herniation of the left anterior temporal pole and dura mater into the orbit, and this resulted into left exophthalmos and encephalomalacia in the left anterior temporal pole. To the best of our knowledge, our case is the second case of basal encephalocele and orbital dystopia.

  13. Patterns of orbital disorders

    Directory of Open Access Journals (Sweden)

    Balasubramanian Thiagarajan

    2014-08-01

    Full Text Available This article discusses various patterns of presentations of orbital lesions. Since this article has been authored by an otolaryngologist, the entire concept has been viewed from otolaryngologist's angle. With the advent of nasal endoscope trans nasal access to orbit is becoming the order of the day. Major advantage being that external skin incision is avoided.

  14. LUNISOLAR INVARIANT RELATIVE ORBITS

    OpenAIRE

    Walid Ali Rahoma

    2013-01-01

    The present study deal with constructing an analytical model within Hamiltonian formulation to design invariant relative orbits due to the perturbation of J2 and the lunisolar attraction. To fade the secular drift separation over the time between two neighboring orbits, two second order conditions that guarantee that drift are derived and enforced to be equal.

  15. Reticulohistiocytoma of the Orbit

    Science.gov (United States)

    Weissman, Heather M.; Hayek, Brent R.; Grossniklaus, Hans E.

    2015-01-01

    Reticulohistiocytoma is a rare, benign histiocytic proliferation of the skin or soft tissue. While ocular involvement has been documented in the past, there have been no previously reported cases of reticulohistiocytoma of the orbit. In this report, the authors describe a reticulohistiocytoma of the orbit in a middle-aged woman. PMID:24807799

  16. Orbital Plots Using Gnuplot

    Science.gov (United States)

    Moore, Brian G.

    2000-06-01

    The plotting program Gnuplot is freely available, general purpose, easy to use, and available on a variety of platforms. Complex three-dimensional surfaces, including the familiar angular parts of the hydrogen atom orbitals, are easily represented using Gnuplot. Contour plots allow viewing the radial and angular variation of the probability density in an orbital. Examples are given of how Gnuplot is used in an undergraduate physical chemistry class to view familiar atomic orbitals in new ways or to generate views of orbital functions that the student may have not seen before. Gnuplot may also be easily integrated into the environment of a Web page; an example of this is discussed (and is available at http://onsager.bd.psu.edu/~moore/orbitals_gnuplot). The plotting commands are entered with a form and a CGI script is used to run Gnuplot and display the result back to the browser.

  17. El CO2 como disolvente y como reactivo

    OpenAIRE

    La Franca Pitarresi, Vincenzo Rosario

    2016-01-01

    Existen numerosas ventajas asociada con el uso de CO2 , tanto como disolvente que como reactivo, y todas se pueden resumir en cuatro categorías generales: beneficios ambiental, beneficios de salud y seguridad, beneficios en el procedimiento y beneficios químicos. Los procesos que implican el CO2 como disolvente no aumentaría las emisiones de CO2, más bien proporcionaría una oportunidad para el reciclaje de CO2 residual. Además, los esfuerzos para secuestrar el CO2 producido de los gases de co...

  18. Utilização de tecnicas de sensoriamento remoto e sistemas de informações geograficas para atualização e geração do mapa compilado de solos da area de proteçãoambiental - APA de Guaratuba (PR)

    OpenAIRE

    Schmidlin, Dirley

    1998-01-01

    Orientador: Helio Olympio da Rocha Dissertação (mestrado) - Universidade Federal do Parana, Setor de Ciencias Agrarias Resumo: O presente estudo objetivou a analise, atualização e compilação de mapas de solos, utilizando técnicas de sensoriamento remoto e sistemas de informações geogníficas. A Área de Proteçao Ambiental - AP A de Guaratuba, onde foi realizado o estudo, possuía sua área coberta com 9 mapas de solos de diversos autores, escalas e épocas. Empregando-se técnicas de processa...

  19. Control de posicionamiento de vehículos remotos a través de la transmisión de la señal de gps

    OpenAIRE

    Velasco Castañeda, Jorge; Vera Mora, John; Estrada Pico, Rebeca

    2009-01-01

    El proyecto abarcó el diseño de un software que permita manejar la información transmitida por un helicóptero vía UHF y la enviada por el sistema GPS para la automatización del cálculo de marcación y distancia desde el buque propio al buque blanco. Además del diseño de una interfaz que permita recibir la información de el rumbo de la unidad de la Red de Datos Nave, así como el envío de datos de marcación relativa y distancia a la Instalación de Tiro Ligero (ITL), Esta modernización ...

  20. Orbit Stabilization of Nanosat

    Energy Technology Data Exchange (ETDEWEB)

    JOHNSON,DAVID J.

    1999-12-01

    An algorithm is developed to control a pulsed {Delta}V thruster on a small satellite to allow it to fly in formation with a host satellite undergoing time dependent atmospheric drag deceleration. The algorithm uses four short thrusts per orbit to correct for differences in the average radii of the satellites due to differences in drag and one thrust to symmetrize the orbits. The radial difference between the orbits is the only input to the algorithm. The algorithm automatically stabilizes the orbits after ejection and includes provisions to allow azimuthal positional changes by modifying the drag compensation pulses. The algorithm gives radial and azimuthal deadbands of 50 cm and 3 m for a radial measurement accuracy of {+-} 5 cm and {+-} 60% period variation in the drag coefficient of the host. Approaches to further reduce the deadbands are described. The methodology of establishing a stable orbit after ejection is illustrated in an appendix. The results show the optimum ejection angle to minimize stabilization thrust is upward at 86{sup o} from the orbital velocity. At this angle the stabilization velocity that must be supplied by the thruster is half the ejection velocity. An ejection velocity of 0.02 m/sat 86{sup o} gives an azimuthal separation after ejection and orbit stabilization of 187 m. A description of liquid based gas thrusters suitable for the satellite control is included in an appendix.

  1. ANÁLISE DA DISTRIBUIÇÃO ESPAÇO-TEMPORAL DA CHUVA, NA MESORREGIÃO METROPOLITANA DE BELÉM-PARÁ: CONTRIBUIÇÕES DA TÉCNICA DE SENSORIAMENTO REMOTO

    Directory of Open Access Journals (Sweden)

    Marcos Ronielly Silva Santos

    2017-06-01

    Full Text Available A identificação dos montantes de chuva para uma região corrobora para a gestão eficiente das politicas públicas e o desenvolvimento social, econômico e ambiental dos centros urbanos.  A mesorregião metropolitana de Belém detém a maior concentração populacional e urbana da Amazônia Oriental, apresentando elevados índices pluviômetros durante todo o ano. Neste contexto o presente trabalho visa identificar a distribuição temporal e espacial da precipitação na mesorregião metropolitana de Belém e associa-la aos principais sistemas precipitantes que atuam na região. Para isto se utilizou o sensoriamento remoto por meio da técnica do CPC MORPHing technique (CMORPH com resolução temporal de 30 min e espacial de 8/8 km. A partir da técnica empregada foram gerados mapas da distribuição têmporo-espacial da chuva com as médias mensais para os dozes meses do ano, decorrentes dos acumulados do período de Jan/2000 a Dez/2010. Os resultados mostram que há uma grande variação temporal e espacial da chuva na mesorregião evidenciando de modo satisfatório a sazonalidade regional da precipitação, com altos índices durante o período chuvoso e baixos índices no período menos chuvoso. Trabalhos que visem à interdisciplinaridade podem contribuir de forma eficaz para estruturação das ciências ambientais e para a tomada de decisões.

  2. La invención de los ancestros: el «patagón antiguo» y la construcción discursiva de un pasado nacional remoto para la Argentina (1870-1915

    Directory of Open Access Journals (Sweden)

    Navarro Floria, Pedro

    2004-08-01

    Full Text Available We intend to demonstrate that the existence of an «Antique Patagon» was an idea stemming from the political need —at the end of the 19th Century— of imagining a remote past for the young Argentinian nation. This article studies in historical context a group of anthropological writings of the 1870’s and 1880’s. Firstly, those of the Argentinian F.P. Moreno and the German-Argentinian H. Burmeister. Secondly, those of the Argentinian E. Zeballos. The former show the relation between nationalist interests and the scientifical debates of the time; the latter are the historical narrative corresponding to those interests.

    Nos proponemos demostrar que la idea de la existencia de un «patagón antiguo» respondió a la necesidad política de imaginar, a fines del siglo XIX, un pasado remoto para la joven nación argentina. Estudiamos en su contexto histórico una serie de trabajos antropológicos de las décadas de 1870 y 1880, del argentino F.P. Moreno y del alemán-argentino H. Burmeister, y de escritos de divulgación del argentino E.S. Zeballos. Los primeros muestran la relación entre los intereses nacionalistas y los debates científicos vigentes en la época; los segundos constituyen el relato histórico funcional a aquellos intereses.

  3. Quark Orbital Angular Momentum

    Directory of Open Access Journals (Sweden)

    Burkardt Matthias

    2015-01-01

    Full Text Available Definitions of orbital angular momentum based on Wigner distributions are used as a framework to discuss the connection between the Ji definition of the quark orbital angular momentum and that of Jaffe and Manohar. We find that the difference between these two definitions can be interpreted as the change in the quark orbital angular momentum as it leaves the target in a DIS experiment. The mechanism responsible for that change is similar to the mechanism that causes transverse single-spin asymmetries in semi-inclusive deep-inelastic scattering.

  4. Prototyping LHC Orbit Control

    CERN Document Server

    Wijnands, Thijs; Srinivasan, B

    2002-01-01

    Orbit correction consists in adjusting the strengths of the corrector magnets to make the measured beam position match a predefined reference. In the LHC, this involves around 2000 sensors and more than 1000 actuators that are distributed along both rings. The orbit correction scheme should be able to compensate for very slow orbit drifts in the range of a 10-2 Hz but also for fast motions (vibrations) up to 1 Hz. In this paper we investigate correction schemes that could be used in either case. The choice of design formalisms is based on the experience we gained with the SPS and the LEP.

  5. O Taekwondo como modalidade paradesportiva

    OpenAIRE

    Jacqueline Martins Patatas

    2012-01-01

    Resumo: O fenômeno Lutas nos remete a um conjunto de modalidades, cada uma com sua história, filosofia e características específicas. Considerando o Taekwondo e suas características como o objeto deste estudo, observamos suas manifestações como esporte para pessoas com deficiência. Então, o presente estudo desenvolve-se sob as bases de uma pesquisa do tipo qualitativa e teve como objetivos gerais apresentar aos profissionais da área da Educação Física conhecimentos sobre o Para-Taekwondo em n...

  6. Análise da qualidade visual da paisagem da região de Tibagi, PR, aplicando o sensoriamento remoto Landscape quality analysis of Tibagi, Paraná state, applying the remote sensing

    Directory of Open Access Journals (Sweden)

    Geraldo S. Landovsky

    2006-03-01

    Full Text Available A avaliação da qualidade visual de paisagens tem-se mostrado ferramenta eficiente para a determinação de diretrizes de usos adequados do solo, levando-se em conta o potencial atrativo dos diversos tipos de cobertura da superfície terrestre. Dentre os empregos das imagens orbitais, é bastante difundida a geração de mapas de ocupação do solo que podem, por sua vez, servir de base para a avaliação da paisagem. Com o presente trabalho objetivou-se propor e testar uma metodologia para a avaliação da qualidade visual da paisagem, através do emprego de imagem orbital classificada e pós-processada e da implementação de um algoritmo específico, para avaliação dos diversos usos da superfície na área em estudo. Para tanto e com base no método indireto de avaliação da paisagem, desenvolveu-se um algoritmo computacional que se utiliza de imagens orbitais para a valoração paisagística. Os resultados obtidos foram mosaicos e mapas da qualidade visual da paisagem da área de estudo. Ao final, concluiu-se que a técnica de avaliação através do programa computacional mostrou-se adequada à finalidade proposta; no entanto, deve ainda ser tida como resultado prévio e base para estudos mais detalhados.The evaluation of landscapes has been showing an efficient tool for purposes of determining the appropriate land uses, considering the potential attraction of the several types of terrestrial surface covering. Among the employments of the orbital images, the generation of land use maps is quite spread, which serves as base for the landscape evaluation. The present work has the objective to propose and to test a methodology for the visual quality evaluation of the landscape, through the employment of classified and post-processed orbital image and implementing a specific algorithm, for evaluation of several uses of the land surface in the study area. Thus, on the basis of indirect method of landscape evaluation, an algorithm that uses of

  7. Congenital orbital teratoma

    Directory of Open Access Journals (Sweden)

    Shereen Aiyub

    2013-01-01

    Full Text Available We present a case of mature congenital orbital teratoma managed with lid-sparing exenteration and dermis fat graft. This is a case report on the management of congenital orbital teratoma. A full-term baby was born in Fiji with prolapsed right globe which was surrounded by a nonpulsatile, cystic mass. Clinical and imaging features were consistent with congenital orbital teratoma. Due to limited surgical expertise, the patient was transferred to Adelaide, Australia for further management. The patient underwent a lid-sparing exenteration with frozen section control of the apical margin. A dermis fat graft from the groin was placed beneath the lid skin to provide volume. Histopathology revealed mature tissues from each of the three germ cell layers which confirmed the diagnosis of mature teratoma. We describe the successful use of demis fat graft in socket reconstruction following lid-sparing exenteration for congenital orbital teratoma.

  8. Envelopes of Cometary Orbits

    Directory of Open Access Journals (Sweden)

    Mijajlović, Ž.

    2008-12-01

    Full Text Available We discuss cometary orbits from the standpoint of Nonstandard (Leibnitz analysis, a relatively new branch of mathematics. In particular, we consider parabolic cometary paths. It appears that, in a sense, every parabola is an ellipse.

  9. Las organizaciones educativas como instituciones

    OpenAIRE

    1999-01-01

    Caracterizar los centros educativos como instituciones o como organizaciones institucionalizadas tiene connotaciones precisas y de gran relevancia en cuanto a su comprensión, diseño. funcionamiento y cambio. Se abordan los conceptos de cultura, institución y organización institucionalizada, prestando especial atención al papel desempeñado por las estructuras organizativas, en conexión con el ambiente. Abstract: The portrait of schools as institutions and institutionalized organizatio...

  10. Orbital interactions in chemistry

    CERN Document Server

    Albright, Thomas A; Whangbo, Myung-Hwan

    2013-01-01

    Explains the underlying structure that unites all disciplines in chemistry Now in its second edition, this book explores organic, organometallic, inorganic, solid state, and materials chemistry, demonstrating how common molecular orbital situations arise throughout the whole chemical spectrum. The authors explore the relationships that enable readers to grasp the theory that underlies and connects traditional fields of study within chemistry, thereby providing a conceptual framework with which to think about chemical structure and reactivity problems. Orbital Interactions

  11. Antisymmetric Orbit Functions

    Directory of Open Access Journals (Sweden)

    Anatoliy Klimyk

    2007-02-01

    Full Text Available In the paper, properties of antisymmetric orbit functions are reviewed and further developed. Antisymmetric orbit functions on the Euclidean space $E_n$ are antisymmetrized exponential functions. Antisymmetrization is fulfilled by a Weyl group, corresponding to a Coxeter-Dynkin diagram. Properties of such functions are described. These functions are closely related to irreducible characters of a compact semisimple Lie group $G$ of rank $n$. Up to a sign, values of antisymmetric orbit functions are repeated on copies of the fundamental domain $F$ of the affine Weyl group (determined by the initial Weyl group in the entire Euclidean space $E_n$. Antisymmetric orbit functions are solutions of the corresponding Laplace equation in $E_n$, vanishing on the boundary of the fundamental domain $F$. Antisymmetric orbit functions determine a so-called antisymmetrized Fourier transform which is closely related to expansions of central functions in characters of irreducible representations of the group $G$. They also determine a transform on a finite set of points of $F$ (the discrete antisymmetric orbit function transform. Symmetric and antisymmetric multivariate exponential, sine and cosine discrete transforms are given.

  12. SENSORIAMENTO REMOTO E GEOPROCESSAMENTO APLICADOS AO ZONEAMENTO GEOAMBIENTAL: Bacia Hidrográfica do Açude Camará - PB

    Directory of Open Access Journals (Sweden)

    Sâmara Rachel Ribeiro da Silva

    2010-01-01

    Full Text Available La diversidad de paisajes en la cuenca de la presa de Cámara, sobre todo en relación con la forma del relieve, el suelo y en la producción, inducida por la realización de la zonifi cación geoambiental. Su importancia radica en su preocupación por la conservación del medio ambiente y el desarrollo socio-económico y la preservación de los recursos naturales en la zona en búsqueda del desarrollo sostenible. Este estudio tuvo como objetivo crear una base de datos actualizada y con la zonifi cación geoambiental, realizar un breve análisis de las características fi siográfi cas, el suelo, el clima, la topografía y el uso de la tierra, la separación y la descripción de las unidades de paisaje, sus fortalezas y limitaciones. Se utilizaron en esta imagen CBERS investigación y técnicas de SIG, SPRING del programa, bases para el trabajo descriptivo en el campo. De la información de suelo, topografía y el uso de la tierra se describieron las zonas propensas a la degradación del medio ambiente. Los resultados obtenidos permitieron en la cuenca dividirlo en 19 unidades ambientales.

  13. [Orbital complications of sinusitis].

    Science.gov (United States)

    Šuchaň, M; Horňák, M; Kaliarik, L; Krempaská, S; Koštialová, T; Kovaľ, J

    2014-12-01

    Orbital complications categorised by Chandler are emergency. They need early diagnosis and agresive treatment. Stage and origin of orbital complications are identified by rhinoendoscopy, ophtalmologic examination and CT of orbite and paranasal sinuses. Periorbital cellulitis and early stage of orbital cellulitis can be treated conservatively with i. v. antibiotics. Monitoring of laboratory parameters and ophtalmologic symptoms is mandatory. Lack of improvement or worsening of symptoms within 24-48 hours and advanced stages of orbital complications are indicated for surgery. The purpose of the study is to evaluate epidemiology, clinical features and management of sinogenic orbital complications. Retrospective data of 8 patients with suspicion of orbital complication admited to hospital from 2008 to 2013 were evaluated. Patients were analyzed in terms of gender, age, CT findings, microbiology, clinical features, stage and treatment. Male and female were afected in rate 1,66:1. Most of patients were young adult in 3rd. and 4th. decade of life (62,5 %). Acute and chronic sinusitis were cause of orbital complication in the same rate. The most common origin of orbital complication was ethmoiditis (62,5 %), than maxillary (25 %) and frontal (12,5 %) sinusitis. Polysinusitis with affection of ethmoidal, maxillary and frontal sinuses (75 %) was usual CT finding. Staphylococcus epidermidis and Staphylococcus aureus were etiological agens in half of cases. Periorbital oedema (100 %), proptosis, chemosis (50 %), diplopia and glaucoma (12,5 %) were observed. Based on examinations, diagnosis of periorbital oedema/preseptal cellulitis was made in 3 (37,5 %), orbital cellulitis in 3 (37,5 %) and subperiosteal abscess in 2 cases (25 %). All patients underwent combined therapy - i. v. antibiotics and surgery within 24 hours. Eradication of disease from ostiomeatal complex (OMC), drainage of affected sinuses and drainage of subperiosteal abscess were done via fuctional endonasal

  14. Técnicas avançadas de sensoriamento remoto aplicadas ao estudo de mudanças climáticas e ao funcionamento dos ecossistemas amazônicos Advanced remote sensing techniques for global changes and Amazon ecosystem functioning studies

    Directory of Open Access Journals (Sweden)

    Evlyn Márcia Leão de Moraes Novo

    2005-06-01

    Full Text Available Este artigo se propõe a apresentar exemplos de questões científicas que puderam ser respondidas no contexto do Projeto LBA (Large Sale Biosphere-Atmosphere Experiment in Amazonia graças à contribuição de informações derivadas de sensoriamento remoto. Os métodos de sensoriamento remoto permitem integrar informações sobre os vários processos físicos e biológicos em diferentes escalas de tempo e espaço. Nesse artigo, são enfatizados aqueles avanços de conhecimento que jamais seriam alcançados sem a concorrência da informação derivada de sensoriamento.This paper aims to assess the contribution of remote sensing technology in addressing key questions raised by the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA. The answers to these questions foster the knowledge on the climatic, biogechemical and hydrologic functioning of the Amazon, as well as on the impact of human activities at regional and global scales. Remote sensing methods allow integrating information on several processes at different temporal and spatial scales. By doing so, it is possible to perceive hidden relations among processes and structures, enhancing their teleconnections. Key advances in the remote sensing science are summarized in this article, which is particularly focused on information that would not be possible to be retrieved without the concurrence of this technology.

  15. Orbit Propagation and Determination of Low Earth Orbit Satellites

    OpenAIRE

    Ho-Nien Shou

    2014-01-01

    This paper represents orbit propagation and determination of low Earth orbit (LEO) satellites. Satellite global positioning system (GPS) configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit propagation (OP). The main contradictions in real-time orbit which is determined by the problem are orbit positioning accuracy and the amount of calculating two indicators. This paper is dedicated to solving the problem of tradeoffs. To plan t...

  16. Orbits for sixteen binaries

    Directory of Open Access Journals (Sweden)

    Cvetković Z.

    2006-01-01

    Full Text Available In this paper orbits for 13 binaries are recalculated and presented. The reason is that recent observations show higher residuals than the corresponding ephemerides calculated by using the orbital elements given in the Sixth Catalog of Orbits of Visual Binary Stars. The binaries studied were: WDS 00182+7257 = A 803, WDS 00335+4006 = HO 3, WDS 00583+2124 = BU 302, WDS 01011+6022 = A 926, WDS 01014+1155 = BU 867, WDS 01112+4113 = A 655, WDS 01361−2954 + HJ 3447, WDS 02333+5219 = STT 42 AB,WDS 04362+0814 = A 1840 AB,WDS 08017−0836 = A 1580, WDS 08277−0425 = A 550, WDS 17471+1742 = STF 2215 and WDS 18025+4414 = BU 1127 Aa-B. In addition, for three binaries - WDS 01532+1526 = BU 260, WDS 02563+7253 = STF 312 AB and WDS 05003+3924 = STT 92 AB - the orbital elements are calculated for the first time. In this paper the authors present not only the orbital elements, but the masses dynamical parallaxes, absolute magnitudes and ephemerides for the next five years, as well.

  17. Helioseismology with Solar Orbiter

    CERN Document Server

    Löptien, Björn; Gizon, Laurent; Schou, Jesper; Appourchaux, Thierry; Rodríguez, Julián Blanco; Cally, Paul S; Dominguez-Tagle, Carlos; Gandorfer, Achim; Hill, Frank; Hirzberger, Johann; Scherrer, Philip H; Solanki, Sami K

    2014-01-01

    The Solar Orbiter mission, to be launched in July 2017, will carry a suite of remote sensing and in-situ instruments, including the Polarimetric and Helioseismic Imager (PHI). PHI will deliver high-cadence images of the Sun in intensity and Doppler velocity suitable for carrying out novel helioseismic studies. The orbit of the Solar Orbiter spacecraft will reach a solar latitude of up to 21 deg (up to 34 deg by the end of the extended mission) and thus will enable the first local helioseismology studies of the polar regions. Here we consider an array of science objectives to be addressed by helioseismology within the baseline telemetry allocation (51 Gbit per orbit, current baseline) and within the science observing windows (baseline 3 x 10 days per orbit). A particularly important objective is the measurement of large-scale flows at high latitudes (rotation and meridional flow), which are largely unknown but play an important role in flux transport dynamos. The full range of Earth-Sun-spacecraft angles provi...

  18. Orbital Fluid Resupply Assessment

    Science.gov (United States)

    Eberhardt, Ralph N.

    1989-01-01

    Orbital fluid resupply can significantly increase the cost-effectiveness and operational flexibility of spacecraft, satellites, and orbiting platforms and observatories. Reusable tankers are currently being designed for transporting fluids to space. A number of options exist for transporting the fluids and propellant to the space-based user systems. The fluids can be transported to space either in the Shuttle cargo bay or using expendable launch vehicles (ELVs). Resupply can thus be accomplished either from the Shuttle bay, or the tanker can be removed from the Shuttle bay or launched on an ELV and attached to a carrier such as the Orbital Maneuvering Vehicle (OMV) or Orbital Transfer Vehicle (OTV) for transport to the user to be serviced. A third option involves locating the tanker at the space station or an unmanned platform as a quasi-permanent servicing facility or depot which returns to the ground for recycling once its tanks are depleted. Current modular tanker designs for monopropellants, bipropellants, and water for space station propulsion are discussed. Superfluid helium tankers are addressed, including trade-offs in tanker sizes, shapes to fit the range of ELVs currently available, and boil-off losses associated with longer-term (greater than 6-month) space-basing. It is concluded that the mixed fleet approach to on-orbit consumables resupply offers significant advantages to the overall logistics requirements.

  19. Extended duration orbiter (EDO) insignia

    Science.gov (United States)

    1990-01-01

    Extended duration orbiter (EDO) insignia incorporates a space shuttle orbiter with payload bay doors (PLBDs) open and a spacelab module inside. Trailing the orbiter are the initials EDO. The EDO-modified Columbia, Orbiter Vehicle (OV) 102, will be flown for the first EDO mission, STS-50.

  20. El museo como espacio educativo

    OpenAIRE

    2013-01-01

    El Trabajo Fin de Grado titulado "El museo como espacio educativo" tutelado por D. Jesús Féliz Pascual Molina, trata sobre el estudio acerca de cómo se usan los museos como espacios lúdicos y como mediadores de enseñanza. Para su realización se ha tenido en cuenta la legislación vigente y sobre todo el Decreto 122/2007 de 27 de Diciembre, por el que se establece el currículo de Educación Infantil en Castilla y León. En él se hace mención a la evolución de los museos, los diferentes tipos exis...

  1. Estado es a individuo como tutor a pupilo: Posibilidades y límites de la soberanía popular en Colombia a la luz de la institución de la tutela del Derecho romano

    Directory of Open Access Journals (Sweden)

    Nelcy López-Cuéllar

    2010-01-01

    Full Text Available Una retrospectiva lingüística permite afirmar que la acción de tutela del Derecho público constitucional tiene raíces en el Derecho privado romano. El término tutela proviene del latín tutelae, expresión usada en Derecho romano para hablar de la relación entre pupilo y tutor. Tal origen se soporta no sólo en la similitud textual de las dos instituciones, sino en el origen remoto del juicio de amparo mexicano en el Derecho romano, juicio que inspiró la tutela colombiana. El origen de la actual tutela tiene repercusiones en la forma como en Colombia se percibe la relación entre individuos y Estado. En efecto, desde 1991, estando la tutela en el corazón de la Constitución, se puede construir la siguiente comparación: Estado es a individuo como tutor es a pupilo. Con base en esta comparación, al Estado le corresponde la diligente administración de los bienes de los individuos en interés de éstos. No obstante esta consecuencia positiva, tal administración se da en virtud de que los individuos se estiman incapaces de tal tarea, situación diferente a la de los individuos dentro de un contrato social. Por tanto, la opción de una democracia participativa parece inalcanzable.

  2. Vertical orbital dystopia.

    Science.gov (United States)

    Tan, S T; Ashworth, G; Czypionka, S; Poole, M D; Briggs, M

    1996-06-01

    Many pathologic processes may lead to vertical orbital dystopia. We reviewed 47 consecutive cases seen over a 13-year period. Twenty-nine patients underwent eye leveling procedures to improve cosmesis, 2 of these by camouflage procedures and 27 by orbital translocation. Ten patients had 16 secondary operations. There was one death, serious complications occurred in 3 patients, and nuisance complications occurred in 20 others. Seven patients developed diplopia postoperatively, and in 6 patients it was troublesome. In these, it resolved fully in 2 patients, improved to be of no consequence in 2, and in the remaining 2 troublesome symptoms persisted requiring inferior oblique muscle recession in 1. Binocular vision was never restored when not present preoperatively, and in 3 patients temporary loss occurred. There was an overall modest but significant improvement in appearance after surgery. It is concluded that vertical orbital translocation is rewarding and worthwhile.

  3. Deceleration Orbit Improvements

    Energy Technology Data Exchange (ETDEWEB)

    Church, M.

    1991-04-26

    During the accelerator studies period of 12/90-1/91 much study time was dedicated to improving the E760 deceleration ramps. 4 general goals were in mind: (1) Reduce the relative orbit deviations from the nominal reference orbit as much as possible. This reduces the potential error in the orbit length calculation - which is the primary source of error in the beam energy calculation. (2) Maximize the transverse apertures. This minimizes beam loss during deceleration and during accidental beam blow-ups. (3) Measure and correct lattice parameters. Knowledge of {gamma}{sub T}, {eta}, Q{sub h}, Q{sub v}, and the dispersion in the straight sections allows for a more accurate energy calculation and reliable SYNCH calculations. (4) Minimize the coupling. This allows one to discern between horizontal and vertical tunes.

  4. [Secondary orbital lymphoma].

    Science.gov (United States)

    Basanta, I; Sevillano, C; Álvarez, M D

    2015-09-01

    A case is presented of an 85 year-old Caucasian female with lymphoma that recurred in the orbit (secondary ocular adnexal lymphoma). The orbital tumour was a diffuse large B-cell lymphoma according to the REAL classification (Revised European-American Lymphoma Classification). Orbital lymphomas are predominantly B-cell proliferations of a variety of histological types, and most are low-grade tumours. Patients are usually middle-aged or elderly, and it is slightly more common in women. A palpable mass, proptosis and blepharoptosis are the most common signs of presentation. Copyright © 2011 Sociedad Española de Oftalmología. Published by Elsevier España, S.L.U. All rights reserved.

  5. Montagem e Imagem como Paradigma

    Directory of Open Access Journals (Sweden)

    Cesar Huapaya

    2016-01-01

    Full Text Available O pensar como montagem e imagem tornou-se um método revelador nos processos de estudos práticos e teóricos do artista e dos pesquisadores nos séculos XX e XXI. Este artigo procura articular três formas de pensar por montagem: nas obras de Bertolt Brecht, Sergei Eisenstein e Georges DidiHuberman. O filósofo e historiador da arte Georges Didi-Huberman reinaugura o debate e o exercício de pensar a antropologia da imagem e a montagem como metalinguagem e forma de conhecimento.

  6. Optical orbital angular momentum

    Science.gov (United States)

    Barnett, Stephen M.; Babiker, Mohamed; Padgett, Miles J.

    2017-01-01

    We present a brief introduction to the orbital angular momentum of light, the subject of our theme issue and, in particular, to the developments in the 13 years following the founding paper by Allen et al. (Allen et al. 1992 Phys. Rev. A 45, 8185 (doi:10.1103/PhysRevA.45.8185)). The papers by our invited authors serve to bring the field up to date and suggest where developments may take us next. This article is part of the themed issue ‘Optical orbital angular momentum’. PMID:28069775

  7. Optical orbital angular momentum

    Science.gov (United States)

    Barnett, Stephen M.; Babiker, Mohamed; Padgett, Miles J.

    2017-02-01

    We present a brief introduction to the orbital angular momentum of light, the subject of our theme issue and, in particular, to the developments in the 13 years following the founding paper by Allen et al. (Allen et al. 1992 Phys. Rev. A 45, 8185 (doi:10.1103/PhysRevA.45.8185)). The papers by our invited authors serve to bring the field up to date and suggest where developments may take us next. This article is part of the themed issue 'Optical orbital angular momentum'.

  8. Caracterização mineralógica de solos tropicais por sensoriamento remoto hiperespectral Mineralogical characterization of tropical soils by hyperspectral remote sensing

    Directory of Open Access Journals (Sweden)

    Marco Antonio Pizarro

    2001-10-01

    Full Text Available Dados hiperespectrais coletados no Brasil pelo sensor AVIRIS (Airborne Visible/Infrared Imaging Spectrometer foram utilizados para a caracterização espectral de uma típica cena agropastoril e para testar o uso da técnica Spectral Feature Fitting (SFF na identificação de minerais argilosos na imagem. Utilizou-se um modelo linear de mistura espectral, usando como membros de referência a vegetação verde e seca, a água, e os solos Nitossolo Vermelho, Latossolo Vermelho e Neossolo Quartzarênico órtico. Na identificação dos minerais, foram selecionados espectros de referência da biblioteca espectral do JPL/NASA. Os espectros dos pixels e das referências foram normalizados pelo método do contínuo espectral, entre 2.100 e 2.330 nm, e depois comparados quanto à similaridade com o uso da técnica SFF. A caulinita predomina na cena, cuja identificação remota é dependente do tipo de solo e das proporções dos componentes da cena no interior do pixels. Os melhores resultados foram obtidos em solos de reflectância intermediária a alta e em pixels com valor de abundância da fração solo superior a 70%. Isto ocorreu devido, respectivamente, à menor quantidade de substâncias opacas nestes solos e à redução nos pixels dos efeitos espectrais da lignina-celulose. Estes fatores tendem a mascarar as bandas de absorção das argilas.AVIRIS (Airborne Visible/Infrared Imaging Spectrometer data collected in Brazil were used for the spectral characterization of a typical crop-pasture scene, and for the evaluation of the Spectral Feature Fitting (SFF technique for clay mineral identification in the image. A six-endmember linear spectral unmixing model was applied, consisting of green and senescent vegetation, water, and the soils Alfisol, Oxisol and Entisol. For mineral identification of kaolinite, montmorillonite and gibbsite in the AVIRIS image, reference spectra from the JPL/NASA spectral library were selected. Pixel and reference spectra

  9. La ciudad como ecosistema urbano

    OpenAIRE

    Higueras García, Esther

    2013-01-01

    LA CIUDAD COMO ECOSISTEMA URBANO .- La ecología y los ecosistemas .- El ecosistema urbano, definición, alcance y oportunidad .- El metabolismo urbano .- Los síntomas de la patología urbana .- Los objetivos del nuevo ecosistema urbano .- Las aportaciones de los ecobarrios

  10. La ciudad como ecosistema urbano

    OpenAIRE

    Higueras García, Esther

    2013-01-01

    LA CIUDAD COMO ECOSISTEMA URBANO .- La ecología y los ecosistemas .- El ecosistema urbano, definición, alcance y oportunidad .- El metabolismo urbano .- Los síntomas de la patología urbana .- Los objetivos del nuevo ecosistema urbano .- Las aportaciones de los ecobarrios

  11. Sobre la escritura como experiencia

    Directory of Open Access Journals (Sweden)

    Oscar Pulido Cortés

    2017-01-01

    Full Text Available Escribir se ha convertido en una de las prácticas más solicitadas y promocionadas en la actualidad. En el mundo académico no solo como una posibilidad de comunicación de los hallazgos de los procesos y proyectos de investigación, sino como una forma de mercantilización de los saberes y circulación de discursos impersonales que se han constreñido a formatos, condiciones específicas y normas para seguir paso a paso. Qué pena que este arte de la vida, la existencia y la razón haya sido colonizado y utilizado por los centros de poder y de saber, que en favor del capital y de sus flujos e intensidades la han colocado, a la escritura, como una esclava, para legitimar la circulación y apropiación de ciertos estatutos teóricos hegemónicos, a los intelectuales y académicos, a su vez como los medios para conseguir estos fines a cambio de salarios, puntos, índices de citación y clasificación en los rankings propios de las diferentes manifestaciones de la ciencia.

  12. Local orbitals by minimizing powers of the orbital variance

    DEFF Research Database (Denmark)

    Jansik, Branislav; Høst, Stinne; Kristensen, Kasper;

    2011-01-01

    It is demonstrated that a set of local orthonormal Hartree–Fock (HF) molecular orbitals can be obtained for both the occupied and virtual orbital spaces by minimizing powers of the orbital variance using the trust-region algorithm. For a power exponent equal to one, the Boys localization function...... is obtained. For increasing power exponents, the penalty for delocalized orbitals is increased and smaller maximum orbital spreads are encountered. Calculations on superbenzene, C60, and a fragment of the titin protein show that for a power exponent equal to one, delocalized outlier orbitals may...

  13. Solar Orbiter Status Report

    Science.gov (United States)

    Gilbert, Holly; St. Cyr, Orville Chris; Mueller, Daniel; Zouganelis, Yannis; Velli, Marco

    2017-08-01

    With the delivery of the instruments to the spacecraft builder, the Solar Orbiter mission is in the midst of Integration & Testing phase at Airbus in Stevenage, U.K. This mission to “Explore the Sun-Heliosphere Connection” is the first medium-class mission of ESA’s Cosmic Vision 2015-2025 program and is being jointly implemented with NASA. The dedicated payload of 10 remote-sensing and in-situ instruments will orbit the Sun as close as 0.3 A.U. and will provide measurments from the photosphere into the solar wind. The three-axis stabilized spacecraft will use Venus gravity assists to increase the orbital inclination out of the ecliptic to solar latitudes as high as 34 degrees in the extended mission. The science team of Solar Orbiter has been working closely with the Solar Probe Plus scientists to coordinate observations between these two highly-complementary missions. This will be a status report on the mission development; the interested reader is referred to the recent summary by Müller et al., Solar Physics 285 (2013).

  14. Sedna Orbit Animation

    Science.gov (United States)

    2004-01-01

    This animation shows the location of the newly discovered planet-like object, dubbed 'Sedna,' in relation to the rest of the solar system. Starting at the inner solar system, which includes the orbits of Mercury, Venus, Earth, and Mars (all in yellow), the view pulls away through the asteroid belt and the orbits of the outer planets beyond (green). Pluto and the distant Kuiper Belt objects are seen next until finally Sedna comes into view. As the field widens the full orbit of Sedna can be seen along with its current location. Sedna is nearing its closest approach to the Sun; its 10,000 year orbit typically takes it to far greater distances. Moving past Sedna, what was previously thought to be the inner edge of the Oort cloud appears. The Oort cloud is a spherical distribution of cold, icy bodies lying at the limits of the Sun's gravitational pull. Sedna's presence suggests that this Oort cloud is much closer than scientists believed.

  15. Myxoma of the orbit.

    Directory of Open Access Journals (Sweden)

    Rambhatla Saptagirish

    2003-01-01

    Full Text Available Myxomas are rare, benign neoplasms of mesenchymal origin that usually develop in soft tissues. As the clinical manifestations are non-specific, it is difficult to diagnose the tumour without biopsy and histopathological examination. We report a case of orbital myxoma with histopathological correlation.

  16. Sedna Orbit Animation

    Science.gov (United States)

    2004-01-01

    This animation shows the location of the newly discovered planet-like object, dubbed 'Sedna,' in relation to the rest of the solar system. Starting at the inner solar system, which includes the orbits of Mercury, Venus, Earth, and Mars (all in yellow), the view pulls away through the asteroid belt and the orbits of the outer planets beyond (green). Pluto and the distant Kuiper Belt objects are seen next until finally Sedna comes into view. As the field widens the full orbit of Sedna can be seen along with its current location. Sedna is nearing its closest approach to the Sun; its 10,000 year orbit typically takes it to far greater distances. Moving past Sedna, what was previously thought to be the inner edge of the Oort cloud appears. The Oort cloud is a spherical distribution of cold, icy bodies lying at the limits of the Sun's gravitational pull. Sedna's presence suggests that this Oort cloud is much closer than scientists believed.

  17. Unusual Sclerosing Orbital Pseudotumor Infiltrating Orbits and Maxillofacial Regions

    Directory of Open Access Journals (Sweden)

    Huseyin Toprak

    2014-01-01

    Full Text Available Idiopathic orbital pseudotumor (IOP is a benign inflammatory condition of the orbit without identifiable local or systemic causes. Bilateral massive orbital involvement and extraorbital extension of the IOP is very rare. We present an unusual case of IOP with bilateral massive orbital infiltration extending into maxillofacial regions and discuss its distinctive magnetic resonance imaging (MRI features that help to exclude other entities during differential diagnoses.

  18. Orbit correction algorithm for SSRF fast orbit feedback system

    Institute of Scientific and Technical Information of China (English)

    LIU Ming; YIN Chongxian; LIU Dekang

    2009-01-01

    A fast orbit feedback system is designed at SSRF to suppress beam orbit disturbance within sub-micron in the bandwidth up to 100 Hz.The SVD (Singular value decomposition) algorithm is applied to calculate the inverse response matrix in global orbit correction.The number of singular eigenvalues will influence orbit noise suppression and corrector strengths.The method to choose singular eigenvalue rejection threshold is studied in this paper,and the simulation and experiment results are also presented.

  19. Comparison of Low Earth Orbit and Geosynchronous Earth Orbits

    Science.gov (United States)

    Drummond, J. E.

    1980-01-01

    The technological, environmental, social, and political ramifications of low Earth orbits as compared to geosynchronous Earth orbits for the solar power satellite (SPS) are assessed. The capital cost of the transmitting facilities is dependent on the areas of the antenna and rectenna relative to the requirement of high efficiency power transmission. The salient features of a low orbit Earth orbits are discussed in terms of cost reduction efforts.

  20. El arte como posible conocimiento

    Directory of Open Access Journals (Sweden)

    Janitzio Alatriste Tobilla

    2010-01-01

    Full Text Available Este artículo es producto de una investigación que intenta construir un modelo metodológico para concebir la producción artística como una forma de conocimiento e incorporar el quehacer imaginario del artista dentro de los esquemas que regulan la investigación académica tanto en México como en el mundo. La construcción de esta propuesta metodológica ha sido creada desde tres posiciones con respecto al conocimiento: la semiótica de Charles S. Peirce, la teoría psicoanalítica de Jacques Lacan y la práctica artística visual.

  1. El singular como diferencia divina

    Directory of Open Access Journals (Sweden)

    Maria Jose Binetti

    2012-01-01

    Full Text Available Mucho se ha hablado sobre la posición de la diferencia como motor dialéctico de la existencia singular kierkegaardiana. El pecado, el otro o el Otro fisuran la subjetividad humana y la obligan a una identidad que guardará siempre la herida. El sujeto de la escisión es, en este sentido, el existente mismo, y tal debe ser el caso si la perspectiva se concentra en la individualidad. No obstante, y desde el punto de vista especulativo, creemos que los mismos principios utilizados por Kierkegaard para explicar el dinamismo de la existencia singular nos llevan más lejos, a saber, nos conducen al absoluto mismo como sujeto último de toda alteridad, respecto del cual el singular hace la diferencia.

  2. del museo como proyecto ilustrado

    Directory of Open Access Journals (Sweden)

    Adolfo Vásquez Rocca

    2008-01-01

    Full Text Available Se intenta aquí superar la tradicional antinomia entre arte y tecnología. En cambio, se propone una comprensión del arte posmoderno a partir de la inscripción del artista en el seno de una cultura de la información. Es así como asistimos a un cambio de paradigma en el estatuto del arte, a una revolución en la escena artística y de nuestros regímenes de visibilidad, de allí la necesidad de explorar el desarrollo de las estéticas de la virtualidad que nos instalan en nuevas lógicas de producción de verdad, emancipadas del museo como instancia última de legitimación artística.

  3. A literatura como antropologia especulativa

    Directory of Open Access Journals (Sweden)

    Alexandre Andre Nodari

    2015-11-01

    Full Text Available Se décadas atrás, Lyotard identificou a crise de legitimação política e do conhecimento de então como a crise dos grandes relatos, talvez se possa dizer que a crise atual é uma crise do grande Relator: a crise das humanidades seria, assim, parte mais geral da crise do Humano. Diante do Antropoceno, as ciências do homem (as antropologias têm como um dos seus desafios converterem-se em humanidades, isto é, especular sobre as definições de homem e mundo, descobrindo outras humanidades e mundos. Aqui, a literatura, entendida a partir de Juan José Saer como uma “antropologia especulativa”, pode revelar-se uma linha de fuga: diante do contingenciamento econômico das humanidades, ela apresenta a contingência ecológica desse modelo de mundo.     This work is licensed under a Creative Commons Attribution 3.0 License.

  4. Diplopia secondary to orbital surgery.

    Science.gov (United States)

    Silbert, David I; Matta, Noelle S; Singman, Eric L

    2012-01-01

    Diplopia may occur following any type of ocular or pericocular surgery. The surgeries most frequently associated with postoperative diplopia include: repair of orbital fracture, endoscopic sinus surgery (from inadvertent orbital penetration), and orbital decompression for thyroid-related immune orbitopathy (TRIO). Postoperative diplopia after orbital tumor resection has been reported--e.g., after excision of fibrous dysplasia and osteoma. However, a recent case series suggests diplopia after orbital tumor resection is uncommon and transient. Surgical intervention for orbital trauma carries the highest risk of postoperative diplopia and will be the focus of this review. We will also present a case report of worsening diplopia following repair of orbital floor fracture to highlight potential motility issues that can arise when implants are employed to treat orbital floor fractures.

  5. Topics in orbit equivalence

    CERN Document Server

    Kechris, Alexander S

    2004-01-01

    This volume provides a self-contained introduction to some topics in orbit equivalence theory, a branch of ergodic theory. The first two chapters focus on hyperfiniteness and amenability. Included here are proofs of Dye's theorem that probability measure-preserving, ergodic actions of the integers are orbit equivalent and of the theorem of Connes-Feldman-Weiss identifying amenability and hyperfiniteness for non-singular equivalence relations. The presentation here is often influenced by descriptive set theory, and Borel and generic analogs of various results are discussed. The final chapter is a detailed account of Gaboriau's recent results on the theory of costs for equivalence relations and groups and its applications to proving rigidity theorems for actions of free groups.

  6. Small Mercury Relativity Orbiter

    Science.gov (United States)

    Bender, Peter L.; Vincent, Mark A.

    1989-01-01

    The accuracy of solar system tests of gravitational theory could be very much improved by range and Doppler measurements to a Small Mercury Relativity Orbiter. A nearly circular orbit at roughly 2400 km altitude is assumed in order to minimize problems with orbit determination and thermal radiation from the surface. The spacecraft is spin-stabilized and has a 30 cm diameter de-spun antenna. With K-band and X-band ranging systems using a 50 MHz offset sidetone at K-band, a range accuracy of 3 cm appears to be realistically achievable. The estimated spacecraft mass is 50 kg. A consider-covariance analysis was performed to determine how well the Earth-Mercury distance as a function of time could be determined with such a Relativity Orbiter. The minimum data set is assumed to be 40 independent 8-hour arcs of tracking data at selected times during a two year period. The gravity field of Mercury up through degree and order 10 is solved for, along with the initial conditions for each arc and the Earth-Mercury distance at the center of each arc. The considered parameters include the gravity field parameters of degree 11 and 12 plus the tracking station coordinates, the tropospheric delay, and two parameters in a crude radiation pressure model. The conclusion is that the Earth-Mercury distance can be determined to 6 cm accuracy or better. From a modified worst-case analysis, this would lead to roughly 2 orders of magnitude improvement in the knowledge of the precession of perihelion, the relativistic time delay, and the possible change in the gravitational constant with time.

  7. Preseptal and orbital cellulitis

    Directory of Open Access Journals (Sweden)

    Emine Akçay

    2014-09-01

    Full Text Available Preseptal cellulitis (PC is defined as an inflammation of the eyelid and surrounding skin, whereas orbital cellulitis (OC is an inflammation of the posterior septum of the eyelid affecting the orbit and its contents. Periorbital tissues may become infected as a result of trauma (including insect bites or primary bacteremia. Orbital cellulitis generally occurs as a complication of sinusitis. The most commonly isolated organisms are Staphylococcus aureus, Streptococcus pneumoniae, S. epidermidis, Haempphilus influenzae, Moraxella catarrhalis and S. pyogenes. The method for the diagnosis of OS and PS is computed tomography. Using effective antibiotics is a mainstay for the treatment of PC and OC. There is an agreement that surgical drainage should be performed in cases of complete ophthalmoplegia or significant visual impairment or large abscesses formation. This infections are also at a greater risk of acute visual loss, cavernous sinus thrombosis, meningitis, cerebritis, endophthalmitis, and brain abscess in children. Early diagnosis and appropriate treatment are crucial to control the infection. Diagnosis, treatment, management and complications of PC and OC are summarized in this manuscript. J MicrobiolInfect Dis 2014; 4(3: 123-127

  8. Chaos Behaviour of Molecular Orbit

    Institute of Scientific and Technical Information of China (English)

    LIU Shu-Tang; SUN Fu-Yan; SHEN Shu-Lan

    2007-01-01

    Based on H(u)ckel's molecular orbit theory,the chaos and;bifurcation behaviour of a molecular orbit modelled by a nonlinear dynamic system is studied.The relationship between molecular orbit and its energy level in the nonlinear dynamic system is obtained.

  9. Orbiter OMS and RCS technology

    Science.gov (United States)

    Boudreaux, R. A.

    1982-01-01

    Orbiter Orbital Maneuver Subsystem (OMS) and Reaction Control Subsystem (RCS) tankage has proved to be highly successful in shuttle flights on-orbit propellant transfer tests were done. Tank qualification tests along with flight demonstrations were carried out future uses of storable propellants are cited.

  10. Alternative remote sensing materials and inventory strategies in tropical forest inventory - Case Lao PDR / Materiais alternativos de sensoriamento remoto e estratégias de inventário no inventário de florestas tropicais – Caso Lao PDR

    Directory of Open Access Journals (Sweden)

    Timo Tokola

    2012-10-01

    Full Text Available In this study, the potential of remote sensing in tropical forests is examined in relation to the diversification of sensors. We report here on the comparison of alternative methods that use multisource data from Airborne Laser Scanning (ALS, Airborne Color Infrared Photograph (CIR, Quickbird and ALOS AVNIR-2 to estimate stem volume and basal area, in Laos. The predictors of ALS metrics were calculated by means of the canopy height distribution approach, while predictors from both spectral and textual features. The correlation of remote sensing materials and field data were used to demonstrate needs for field inventory in different forest landscapes and varying tropical forest conditions. Variogram based analysis was used to derive optimal forest inventory procedure for different parts of case country.ResumoNeste estudo, o potencial do sensoriamento remoto em florestas tropicais é examinado em relação a diversidade de sensores. Registramos aqui a comparação de métodos alternativos que utilizam dados de fontes múltiplas do Airborne Laser Scanning (ALS, Airborne CIR, Quickbird e ALOS AVNIR-2 para estimar o volume do caule e a área basal em Laos. Os preditores dos dados ALS foram calculados pelo método da distribuição de altura do dossel enquanto preditores para características espectrais e textuais foram geradas, respectivamente, para os dados Airbone CIR e ALOS AVNIR-2. A correlação dos materiais de sensoriamento remoto e dados de campo foram usados para demonstrar a necessidade do inventário de campo em diferentes paisagens florestais e condições variáveis em floresta tropical. A análise baseada no variograma foi utilizada para gerar um procedimento otimizado para o inventário florestal de diferentes partes do país em estudo.

  11. La cronicidad como concepto contratransferencial.

    OpenAIRE

    Josep Vidal Otero

    1998-01-01

    Durante años, el discurso de la reforma psiquiátrica -tanto el institucional como el reivindicativo-ha venido utilizando una serie de expresiones y conceptos que hoy parecen gastados, convertidos en meros referentes formales de la retórica de dicho discurso. Fenómeno éste que en parte está relacionado con la actual mengua conceptual dentro de los campos ideológico y epistemológico. En parte, también, con la deficiente concreción práctica de las reformas que dichos conceptos sugerían. Pero que...

  12. Sazonalidade de variáveis biofísicas em regiões semiáridas pelo emprego do sensoriamento remoto Biophysics variables seasonality on surface in semiarid regions by using remote sensing

    Directory of Open Access Journals (Sweden)

    Joseilson O. Rodrigues

    2009-09-01

    Full Text Available Para investigar alterações no albedo, no Índice de Vegetação por Diferença Normalizada (NDVI, no saldo de radiação e no fluxo de calor no solo, em decorrência do regime pluviométrico no semiárido cearense, desenvolveu-se um estudo na bacia do Rio Trussu - Ceará, empregando-se sensoriamento remoto. Foram utilizadas duas imagens Landsat 7 ETM+, datadas de 25-10-2000 e 24-7-2001, sendo as variáveis estimadas pelo emprego do algoritmo SEBAL (Surface Energy Balance Algorithms for Land. Os resultados mostraram que as variáveis investigadas apresentaram alterações entre as duas estações, sendo os maiores valores de albedo registrados na estação seca. O NDVI apresentou maior sensibilidade ao regime hídrico, mostrando alto potencial de recuperação da vegetação ao efeito da precipitação. As margens do Rio Trussu apresentaram NDVI superior a 0,39, sendo indicativo de preservação da mata ciliar. A vegetação da bacia mostrou alto poder resiliente expresso pelo incremento nos valores de NDVI para o ano de 2001. A estação chuvosa exerceu também influência marcante sobre o saldo de radiação e fluxo de calor no solo, confirmando o efeito da estação climática na modificação do balanço de energia sobre a bacia.To investigate the rainfall regime effects over the albedo, NDVI (normalized difference vegetation index, net radiation and soil heat flux in a semiarid region (Northeast of Brazil, a study in the Trussu watershed was developed by using remote sensing. The study focuses on two images (Landsat 7 ETM+ provided by Instituto Nacional de Pesquisas Espaciais (INPE, from October 25, 2000 and July 24, 2001, each of them having a different rainfall regime (dry and wet seasons. The images were analyzed by using the SEBAL algorithm (surface energy balance algorithm for land. The results showed that the amount of rainfall affected the investigated variables, and the highest values of albedo were registered during the dry season

  13. Orbit Propagation and Determination of Low Earth Orbit Satellites

    Directory of Open Access Journals (Sweden)

    Ho-Nien Shou

    2014-01-01

    Full Text Available This paper represents orbit propagation and determination of low Earth orbit (LEO satellites. Satellite global positioning system (GPS configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit propagation (OP. The main contradictions in real-time orbit which is determined by the problem are orbit positioning accuracy and the amount of calculating two indicators. This paper is dedicated to solving the problem of tradeoffs. To plan to use a nonlinear filtering method for immediate orbit tasks requires more precise satellite orbit state parameters in a short time. Although the traditional extended Kalman filter (EKF method is widely used, its linear approximation of the drawbacks in dealing with nonlinear problems was especially evident, without compromising Kalman filter (unscented Kalman Filter, UKF. As a new nonlinear estimation method, it is measured at the estimated measurements on more and more applications. This paper will be the first study on UKF microsatellites in LEO orbit in real time, trying to explore the real-time precision orbit determination techniques. Through the preliminary simulation results, they show that, based on orbit mission requirements and conditions using UKF, they can satisfy the positioning accuracy and compute two indicators.

  14. Galactic Habitable Orbits

    Science.gov (United States)

    Rahimi, A.; Mao, S.; Kawata, D.

    2014-03-01

    The fossil record shows that the Earth has experienced several mass extinctions over the past 500 million years1, and it has been suggested that there is a periodicity in extinction events on timescales of tens1 and/or hundreds of millions of years. Various hypotheses have been proposed to explain the cause of the mass extinctions, including the suggestion that the Earth's ozone layer may have been destroyed by intense radiation from a nearby supernovae2- 3, exposing the Earth's surface to damaging UV radiation. Recent observations of cores taken from the ocean floor revealed atoms of a very rare isotope of iron (60Fe) believed to have arrived on Earth around 2 million years ago as fallout from a nearby supernovae4. Astronomical evidence for that past supernovae was recently found in the debris of a young cluster of massive stars5, by tracing its past orbit, putting it at the right place at the right time to explain the mild extinction event. Here we report new high-resolution (both in space and time) N-body chemodynamical simulations (carried out with our novel code GCD+6) of the evolution of a model Milky Way Galaxy, tracing the orbit of èsun-like' stars over a 500 million year period, checking the proximity to supernovae throughout the history of the orbit and comparing the times when this occurs with past mass extinctions on Earth. We additionally explain the important effects of the spiral arm pattern, radial migration of stars and Galactic chemistry on habitability.

  15. Review of orbital imaging

    Energy Technology Data Exchange (ETDEWEB)

    Goh, P.S. [Department of Diagnostic Imaging, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074 (Singapore)], E-mail: dnrgohps@nus.edu.sg; Gi, M.T. [Department of Diagnostic Imaging, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074 (Singapore); Charlton, A. [Department of Pathology, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074 (Singapore); Tan, C.; Gangadhara Sundar, J.K.; Amrith, S. [Department of Ophthalmology, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074 (Singapore)

    2008-06-15

    CT and MRI are commonly used in the evaluation of patients with suspected orbital disease. Many different diseases may present within this small anatomical space. The purpose of this article is to present a diagnostic strategy based on a compartment model. Localizing pathology to sinus, bone, extraconal space, muscle cone, intraconal space, optic nerve, globe or lacrimal fossa allows significant reduction in the number of differential diagnoses as these compartments contain different tissues which disease may involve or arise from. Certain diseases may also present in multiple compartments. Common diseases which might present in one or multiple compartments will be discussed.

  16. Lunar Exploration Orbiter (LEO)

    Science.gov (United States)

    Jaumann, R.; Spohn, T.; Hiesinger, H.; Jessberger, E. K.; Neukum, G.; Oberst, J.; Helbert, J.; Christensen, U.; Keller, H. U.; Mall, U.; Böhnhardt, H.; Hartogh, P.; Glassmeier, K.-H.; Auster, H.-U.; Moreira, A.; Werner, M.; Pätzold, M.; Palme, H.; Wimmer-Schweingruber, R.; Mandea, M.; Lesur, V.; Häusler, B.; Hördt, A.; Eichentopf, K.; Hauber, E.; Hoffmann, H.; Köhler, U.; Kührt, E.; Michaelis, H.; Pauer, M.; Sohl, F.; Denk, T.; van Gasselt, S.

    2007-08-01

    The Moon is an integral part of the Earth-Moon system, it is a witness to more than 4.5 b. y. of solar system history, and it is the only planetary body except Earth for which we have samples from known locations. The Moon is our closest companion and can easily be reached from Earth at any time, even with a relatively modest financial budget. Consequently, the Moon was the first logical step in the exploration of our solar system before we pursued more distant targets such as Mars and beyond. The vast amount of knowledge gained from the Apollo and other lunar missions of the late 1960's and early 1970's demonstrates how valuable the Moon is for the understanding of our planetary system. Even today, the Moon remains an extremely interesting target scientifically and technologically, as ever since, new data have helped to address some of our questions about the Earth-Moon system, many questions remained. Therefore, returning to the Moon is the critical stepping-stone to further exploring our immediate planetary neighborhood. In this concept study, we present scientific and technological arguments for a national German lunar mission, the Lunar Explorations Orbiter (LEO). Numerous space-faring nations have realized and identified the unique opportunities related to lunar exploration and have planned missions to the Moon within the next few years. Among these missions, LEO will be unique, because it will globally explore the Moon in unprecedented spatial and spectral resolution. LEO will significantly improve our understanding of the lunar surface composition, surface ages, mineralogy, physical properties, interior, thermal history, gravity field, regolith structure, and magnetic field. The Lunar Explorations Orbiter will carry an entire suite of innovative, complementary technologies, including high-resolution camera systems, several spectrometers that cover previously unexplored parts of the electromagnetic spectrum over a broad range of wavelengths, microwave and

  17. Seleção de áreas de interesse ecológico através de sensoriamento remoto e de otimização matemática: um estudo de caso no município de Cocalinho, MT Selection of areas of ecological importance through remote sensing and mathematics optimization: a case study in the municipality of Cocalinho, Mato Grosso

    Directory of Open Access Journals (Sweden)

    Teresa Cristina da Silveira Anacleto

    2005-12-01

    Full Text Available A criação de unidades de conservação tem sido a principal estratégia para preservar a biodiversidade. O recente emprego de técnicas como o sensoriamento remoto e a otimização matemática, aliados a dados biológicos, ajudam a definir as áreas prioritárias para conservação, indicando a representação máxima da biodiversidade com base em medidas de complementaridade. O presente trabalho objetivou selecionar áreas de interesse ecológico, com base na heterogeneidade de hábitats, através da integração de imagens de satélite com dados biológicos, em Cocalinho, MT. As 66 parcelas quadradas estabelecidas foram comparadas com base na heterogeneidade e na representatividade mínima (ha dos ambientes em cada parcela, através do programa SITES. O parque de cerrado é a fitofisionomia predominante em Cocalinho (38,44%. A região central do município concentrou o maior agrupamento de parcelas, indicando a maior heterogeneidade de hábitats do local. Oficialmente, 6% da área total do município estão protegidos em duas unidades de conservação na categoria de Refúgios de Vida Silvestre. Esses refúgios foram demarcados em locais com cobertura vegetal homogênea e sem considerar a composição faunística e florística. O modelo usado neste estudo pode ser uma boa abordagem a ser empregada no processo de indicação de novas unidades de conservação no bioma Cerrado ou em outros biomas do Brasil.The creation of conservation areas has been a major strategy for biodiversity conservation. The recent use of techniques such as remote sensing and the optimization of mathematics contribute to the identification of priority areas for conservation through the use of biological data. Thus, maximal representativeness of biodiversity based on measures of complementarity can be achieved. This study aimed to identify areas of ecological importance in the municipality of Cocalinho, Mato Grosso. The selection was based on habitat heterogeneity

  18. La paz como proyecto constitucional

    Directory of Open Access Journals (Sweden)

    Leonardo García Jaramillo

    2013-01-01

    Full Text Available A pesar de la históricamente alegada estabilidad democrática de Colombia, se trata de un país que ha oscilado desde hace más de 50 años entre indicadores desfavorables respecto de la violencia y la inestabilidad institucional, en algunas ocasiones particularmente negativos. A finales de 1980 una serie de factores políticos, jurídicos, económicos y sociales, agravados por la confrontación entre el Estado y el cartel de Medellín, así como por el surgimiento de nuevas guerrillas y luego de los paramilitares, confluyeron en la necesidad imperativa de cambiar el texto constitucional. No solo se consignó en la nueva Constitución que "la paz es un derecho y un deber de obligatorio cumplimiento", sino que tras 20 años de desarrollo legislativo y judicial de esta disposición la paz se ha procurado alcanzar aumentando la seguridad pero con cada vez mayor consciencia de la necesidad de implementar políticas de justicia social. En pocos contextos como el colombiano se ha procurado reivindicar la idea de Bobbio: "Una constitución es un pacto de paz".

  19. Terroristas como pessoas no direito?

    Directory of Open Access Journals (Sweden)

    Günther Jakobs

    2009-03-01

    Full Text Available A punição de terroristas, em larga medida preliminar, ou os severos interrogatórios, não se adequam a um perfeito Estado de direito. Pertencem ao direito de exceção. Um Estado de direito que tudo abarque não poderia travar esta guerra, pois ele deveria tratar seus inimigos como pessoas e, conseqüentemente, não poderia tratá-las como fonte de perigo. Em Estados de direito que operam na prática de modo ótimo procede-se de outra maneira, e isso lhes dá a chance de não se quebrarem durante o ataque a seus inimigos.The preemptive punishment of terrorists and the use of harsh interrogation techniques are not within the classical standards of the Rule of Law. They belong rather to a state of exception. A State committed to all the usually accepted requirements of the Rule of Law would not be allowed to carry such a war, because it would have the duty to treat its enemies as persons. Therefore, it would not be authorized to treat them as a source of danger. Nevertheless, these classical standards have been challenged in the last two decades by major institutional changes that are now being discussed both in theoretical as in practical levels.

  20. El dictado como tarea comunicativa

    Directory of Open Access Journals (Sweden)

    Daniel Cassany

    2004-01-01

    Full Text Available El artículo explora las utilidades didácticas del dictado (la práctica comunicativa de oralizar o leer en voz alta un escrito para el aprendizaje funcional de una lengua materna o extranjera, en los diversos niveles de enseñanza. Después de criticar el uso tradicional de este ejercicio lingüístico, presentamos once formas diferentes de desarrollar un dictado en clase, con sus particulares contenidos, objetivos y metodologías. También analizamos con detalle la técnica más tradicional del dictado magistral, en la que el docente dicta palabra por palabra un texto al alumnado, poniendo énfasis en la ortografía; ofrecemos algunas orientaciones para incrementar el componente comunicativo de esta propuesta. Las conclusiones finales proponen entender esta técnica como un recurso metodológico variado, rico y sugerente, adaptado a cada situación de aprendizaje —y no como una práctica obligatoria y fosilizada.

  1. Periodic orbits for three and four co-orbital bodies

    Science.gov (United States)

    Verrier, P. E.; McInnes, C. R.

    2014-08-01

    We investigate the natural families of periodic orbits associated with the equilibrium configurations of the planar-restricted 1 + n-body problem for the case 2 ≤ n ≤ 4 equal-mass satellites. Such periodic orbits can be used to model both trojan exoplanetary systems and parking orbits for captured asteroids within the Solar system. For n = 2, there are two families of periodic orbits associated with the equilibria of the system: the well-known horseshoe and tadpole orbits. For n = 3, there are three families that emanate from the equilibrium configurations of the satellites, while for n = 4, there are six such families as well as numerous additional connecting families. The families of periodic orbits are all of the horseshoe or tadpole type, and several have regions of neutral linear stability.

  2. Periodic orbits for 3 and 4 co-orbital bodies

    CERN Document Server

    Verrier, Patricia

    2014-01-01

    We investigate the natural families of periodic orbits associated with the equilibrium configurations of the the planar restricted $1+n$ body problem for the case $2\\leq n \\leq 4$ equal mass satellites. Such periodic orbits can be used to model both trojan exoplanetary systems and parking orbits for captured asteroids within the solar system. For $n=2$ there are two families of periodic orbits associated with the equilibria of the system: the well known horseshoe and tadpole orbits. For $n=3$ there are three families that emanate from the equilibrium configurations of the satellites, while for $n=4$ there are six such families as well as numerous additional connecting families. The families of periodic orbits are all of the horseshoe or tadpole type, and several have regions of neutral linear stability.

  3. Orbital debris issues

    Science.gov (United States)

    Kessler, D. J.

    Orbital debris issues fall into three major topics: Environment Definition, Spacecraft Hazard, and Space Object Management. The major issue under Environment Definition is defining the debris flux for sizes smaller (10 cm in diameter) than those tracked by the North American Aerospace Defense Command (NORAD). Sources for this size debris are fragmentation of larger objects, either by explosion or collision, and solid rocket motor products. Modeling of these sources can predict fluxes in low Earth orbit which are greater than the meteoroid environment. Techniques to measure the environment in the size interval between 1 mm and 10 cm are being developed, including the use of telescopes and radar both on the ground and in space. Some impact sensors designed to detect meteoroids may have detected solid rocket motor products. Once the environment is defined, it can be combined with hypervelocity impact data and damage criteria to evaluate the Spacecraft Hazard. Shielding may be required to obtain an acceptable damage level. Space Object Management includes techniques to control the environment and the desired policy to effectively minimize the hazard to spacecraft. One control technique - reducing the likelihood of future explosions in space - has already been implemented by NASA. The effectiveness of other techniques has yet to be evaluated.

  4. [Endoscopic approaches to the orbit].

    Science.gov (United States)

    Cebula, H; Lahlou, A; De Battista, J C; Debry, C; Froelich, S

    2010-01-01

    During the last decade, the use of endoscopic endonasal approaches to the pituitary has increased considerably. The endoscopic endonasal and transantral approaches offer a minimally invasive alternative to the classic transcranial or transconjunctival approaches to the medial aspect of the orbit. The medial wall of the orbit, the orbital apex, and the optic canal can be exposed through a middle meatal antrostomy, an anterior and posterior ethmoidectomy, and a sphenoidotomy. The inferomedial wall of the orbit can be also perfectly visualized through a sublabial antrostomy or an inferior meatal antrostomy. Several reports have described the use of an endoscopic approach for the resection or the biopsy of lesions located on the medial extraconal aspect of the orbit and orbital apex. However, the resection of intraconal lesions is still limited by inadequate instrumentation. Other indications for the endoscopic approach to the orbit are the decompression of the orbit for Graves' ophthalmopathy and traumatic optic neuropathy. However, the optimal management of traumatic optic neuropathy remains very controversial. Endoscopic endonasal decompression of the optic nerve in case of tumor compression could be a more valid indication in combination with radiation therapy. Finally, the endoscopic transantral treatment of blowout fracture of the floor of the orbit is an interesting option that avoids the eyelid or conjunctive incision of traditional approaches. The collaboration between the neurosurgeon and the ENT surgeon is mandatory and reduces the morbidity of the approach. Progress in instrumentation and optical devices will certainly make this approach promising for intraconal tumor of the orbit.

  5. Acute sinusitis in children: a retrospective study of orbital complications

    OpenAIRE

    Levon Mekhitarian Neto; Shirley Pignatari; Sérgio Mitsuda; Antonio Sérgio Fava; Aldo Stamm

    2007-01-01

    Das complicações da sinusite, as que envolvem a região orbitária são mais freqüentes. OBJETIVO: Este trabalho tem por objetivo mostrar a incidência de celulite orbitária (CO) como complicação de sinusite aguda em crianças. Forma de Estudo: Retrospectivo. MÉTODO: Após autorização específica, foram avaliados todos os prontuários de pacientes pediátricos, com idade até 12 anos, com diagnóstico de complicação orbitária por sinusite, admitidos na Clínica de ORL e Pediátrica do HPEV no período de 1...

  6. A Typical Presentation of Orbital Pseudotumor Mimicking Orbital Cellulitis

    Directory of Open Access Journals (Sweden)

    J. Ayatollahi

    2013-10-01

    Full Text Available Introduction: Orbital pseudotumor, also known as idiopathic orbital inflammatory syndrome (IOIS, is a benign, non- infective inflammatory condition of the orbit without identifiable local or systemic causes. The disease may mimics a variety of pathologic conditions. We pre-sent a case of pseudotumor observed in a patient admitted under the name of orbital celluli-ties. Case Report: A 26-year-old woman reffered to our hospital with the history of left ocular pain and headache 2 days before her visit.. Ophthalmological examination of the patient was normal except for the redness and lid edema, mild chemosis and conjunctival injection. Gen-eral assessment was normal but a low grade fever was observed. She was hospitalized as an orbital cellulitis patient. She was treated with intravenous antibiotics. On the third day , sud-denly diplopia, proptosis in her left eye and ocular pain in her right side appeared. MRI re-vealed bilateral enlargement of extraocular muscles. Diagnosis of orbital pseudotumor was made and the patient was treated with oral steroid.She responded promptly to the treatment. Antibiotics were discontinued and steroid was tapered in one month period under close fol-low up. Conclusion: The clinical features of orbital pseudotumor vary widely . Orbital pseudotumor and orbital cellulitis can occasionally demonstrate overlapping features.. Despite complete physical examination and appropriate imaging, sometimes correct diagnosis of the disease would be difficult (Sci J Hamadan Univ Med Sci 2013; 20 (3:256-259

  7. Como Lo Hago Yo: Myelomeningocele

    Science.gov (United States)

    Lazareff, Jorge

    2014-01-01

    Fortificación con ádico fólico es efectiva, pero aún falta conciencia en los jóvenes. La legalidad del aborto aumenta la importancia de la consulta prenatal. Realizo la cirugía bajo microcoscopio por razones didácticas. Irrigación continua para reducir la temperatura del tejido. Trato a la plaqueta como tejido viable. No suturo la plaqueta. No cierro músculo. ATB por una semana después de cirugía. Hidrocefalia: Válvula en todos los casos de ventriculomegalia. Médula anclada: Desanclar una sola vez. Chiari II: Revisar la válvula. Incluir en el seguimiento rendimiento escolar, puede indicar obstrucción de la válvula o médula anclada. PMID:24791217

  8. Vivencias afectivas como discurso virtual

    Directory of Open Access Journals (Sweden)

    Mijaíl Málishev

    2011-01-01

    Full Text Available El discurso virtual expresa nuestras vivencias afectivas tanto en el futuro -esperanza- como en el pasado -culpa y venganza-. La esperanza es un estímulo que nos alienta a alcanzar nuestras metas. A diferencia del futuro, el pasado es irreversible y, sin embargo, el pluscuamperfecto es un "mago" que "transforma" lo irreparable en lo virtual. Nuestra conciencia nos hace sentir culpables, haciéndonos creer que lo indebido que hemos cometido, hubiéramos podido hacerlo de otra manera. El pluscuamperfecto expresa la venganza que nos hace "lavar la ofensa" causada por nuestro adversario, pero el discurso virtual en el pluscuamperfecto nos ayuda a sublimar nuestros rencores sin causar algún daño a nuestro adversario y a nuestra propia reputación.

  9. administra como anticonceptivo de emergencia

    Directory of Open Access Journals (Sweden)

    Horacio Croxatto

    2007-01-01

    Full Text Available La anticoncepción hormonal de emergencia (AHE es uno de los pocos recursos que la mujer puede usar para prevenir un embarazo no deseado después de haber tenido una relación sexual en la que no usó método anticonceptivo o el que usó presentó una falla. Actualmente, el método preferido para la AHE es la píldora que contiene solamente levonorgestrel (LNG. Según la OMS, puede prevenir embarazos si se usa hasta 120 horas después del acto sexual, pero su eficacia disminuye drásticamente desde 85% a 31% mientras más se posterga su administración. La introducción de la AHE ha generado controversia en muchos países latinoamericanos por la percepción errónea de que induce aborto y la oposición de los sectores más conservadores de la sociedad que temen que favorezca la promiscuidad. Con el propósito de dar a conocer la evidencia científica producida por las investigaciones diseñadas para dilucidar como el LNG previene el embarazo cuando se administra como AHE, y su correcta interpretación, este artículo analiza críticamente dichos estudios y explica además en que circunstancias este método no logra prevenir el embarazo. El conjunto de la evidencia indica que LNG previene el embarazo solamente cuando impide la fecundación y descarta que el prevenga el embarazo interfiriendo con la implantación del embrión, por lo que la creencia de que es abortivo no tiene sustento científico.

  10. Lunar Reconnaissance Orbiter

    Science.gov (United States)

    Morgan, T.; Chin, G.

    2007-08-01

    NASA's Lunar Reconnaissance Orbiter (LRO) plans to launch in October 2008 with a companion secondary impactor mission, LCROSS, as the inaugural missions for the Exploration System Mission Directorate. LRO is a pathfinder whose objective is to obtain the needed information to prepare for eventual human return to the Moon. LRO will undertake at least one baseline year of operation with additional extended mission phase sponsored by NASA's Science Mission Directorate. LRO will employ six individual instruments to produce accurate maps and high-resolution images of future landing sites, to assess potential lunar resources, and to characterize the radiation environment. LRO will also test the feasibility of one advanced technology demonstration package. The LRO payload includes: Lunar Orbiter Laser Altimeter (LOLA) which will determine the global topography of the lunar surface at high resolution, measure landing site slopes, surface roughness, and search for possible polar surface ice in shadowed regions; Lunar Reconnaissance Orbiter Camera (LROC) which will acquire targeted narrow angle images of the lunar surface capable of resolving meter-scale features to support landing site selection, as well as wide-angle images to characterize polar illumination conditions and to identify potential resources; Lunar Exploration Neutron Detector (LEND) which will map the flux of neutrons from the lunar surface to search for evidence of water ice, and will provide space radiation environment measurements that may be useful for future human exploration; Diviner Lunar Radiometer Experiment (DLRE) which will chart the temperature of the entire lunar surface at approximately 300 meter horizontal resolution to identify cold-traps and potential ice deposits; Lyman-Alpha Mapping Project (LAMP) which will map the entire lunar surface in the far ultraviolet. LAMP will search for surface ice and frost in the polar regions and provide images of permanently shadowed regions illuminated only

  11. Orbital State Uncertainty Realism

    Science.gov (United States)

    Horwood, J.; Poore, A. B.

    2012-09-01

    Fundamental to the success of the space situational awareness (SSA) mission is the rigorous inclusion of uncertainty in the space surveillance network. The *proper characterization of uncertainty* in the orbital state of a space object is a common requirement to many SSA functions including tracking and data association, resolution of uncorrelated tracks (UCTs), conjunction analysis and probability of collision, sensor resource management, and anomaly detection. While tracking environments, such as air and missile defense, make extensive use of Gaussian and local linearity assumptions within algorithms for uncertainty management, space surveillance is inherently different due to long time gaps between updates, high misdetection rates, nonlinear and non-conservative dynamics, and non-Gaussian phenomena. The latter implies that "covariance realism" is not always sufficient. SSA also requires "uncertainty realism"; the proper characterization of both the state and covariance and all non-zero higher-order cumulants. In other words, a proper characterization of a space object's full state *probability density function (PDF)* is required. In order to provide a more statistically rigorous treatment of uncertainty in the space surveillance tracking environment and to better support the aforementioned SSA functions, a new class of multivariate PDFs are formulated which more accurately characterize the uncertainty of a space object's state or orbit. The new distribution contains a parameter set controlling the higher-order cumulants which gives the level sets a distinctive "banana" or "boomerang" shape and degenerates to a Gaussian in a suitable limit. Using the new class of PDFs within the general Bayesian nonlinear filter, the resulting filter prediction step (i.e., uncertainty propagation) is shown to have the *same computational cost as the traditional unscented Kalman filter* with the former able to maintain a proper characterization of the uncertainty for up to *ten

  12. Precise Orbit Determination for ALOS

    Science.gov (United States)

    Nakamura, Ryo; Nakamura, Shinichi; Kudo, Nobuo; Katagiri, Seiji

    2007-01-01

    The Advanced Land Observing Satellite (ALOS) has been developed to contribute to the fields of mapping, precise regional land coverage observation, disaster monitoring, and resource surveying. Because the mounted sensors need high geometrical accuracy, precise orbit determination for ALOS is essential for satisfying the mission objectives. So ALOS mounts a GPS receiver and a Laser Reflector (LR) for Satellite Laser Ranging (SLR). This paper deals with the precise orbit determination experiments for ALOS using Global and High Accuracy Trajectory determination System (GUTS) and the evaluation of the orbit determination accuracy by SLR data. The results show that, even though the GPS receiver loses lock of GPS signals more frequently than expected, GPS-based orbit is consistent with SLR-based orbit. And considering the 1 sigma error, orbit determination accuracy of a few decimeters (peak-to-peak) was achieved.

  13. Orbital Eccrine Hidrocystoma

    Directory of Open Access Journals (Sweden)

    Deniz Marangoz

    2016-10-01

    Full Text Available A 29-year-old female patient presented with a painless mass on her upper eyelid medially. She noticed the mass 4 years earlier and it had increased in size over time. She had no diplopia, eyelid swelling, skin lesion overlying the mass, or visual disturbances. On ocular examination, eye movements and funduscopy were normal. The mass was movable and painless with palpation. Magnetic resonance imaging with contrast showed a 12x8x7 mm well-circumscribed cystic lesion with no contrast dye appearance. Surgical removal was performed delicately and no capsular rupture occured. Pathological examination revealed an eccrine hidrocystoma. Our aim is to underline that eccrine hidrocystoma should be included in differential diagnosis of orbital masses.

  14. Exploratory orbit analysis

    Energy Technology Data Exchange (ETDEWEB)

    Michelotti, L.

    1989-03-01

    Unlike the other documents in these proceedings, this paper is neither a scientific nor a technical report. It is, rather, a short personal essay which attempts to describe an Exploratory Orbit Analysis (EOA) environment. Analyzing the behavior of a four or six dimensional nonlinear dynamical system is at least as difficult as analyzing events in high-energy collisions; the consequences of doing it badly, or slowly, would be at least as devastating; and yet the level of effort and expenditure invested in the latter, the very attention paid to it by physicists at large, must be two orders of magnitude greater than that given to the former. It is difficult to choose the model which best explains the behavior of a physical device if one does not first understand the behavior of the available models. The time is ripe for the development of a functioning EOA environment, which I will try to describe in this paper to help us achieve this goal.

  15. Orbital angular momentum microlaser

    Science.gov (United States)

    Miao, Pei; Zhang, Zhifeng; Sun, Jingbo; Walasik, Wiktor; Longhi, Stefano; Litchinitser, Natalia M.; Feng, Liang

    2016-07-01

    Structured light provides an additional degree of freedom for modern optics and practical applications. The effective generation of orbital angular momentum (OAM) lasing, especially at a micro- and nanoscale, could address the growing demand for information capacity. By exploiting the emerging non-Hermitian photonics design at an exceptional point, we demonstrate a microring laser producing a single-mode OAM vortex lasing with the ability to precisely define the topological charge of the OAM mode. The polarization associated with OAM lasing can be further manipulated on demand, creating a radially polarized vortex emission. Our OAM microlaser could find applications in the next generation of integrated optoelectronic devices for optical communications in both quantum and classical regimes.

  16. Orbital science's 'Bermuda Triangle'

    Science.gov (United States)

    Sherrill, Thomas J.

    1991-02-01

    The effects of a part of the inner Van Allen belt lying closest to the earth, known as the South Atlantic Anomaly (SAA) upon spacecraft including the Hubble Space Telescope (HST), are discussed. The area consists of positively charged ions and electrons from the Van Allen Belt which become trapped in the earth's dipole field. Contor maps representing the number of protons per square centimeter per second having energies greater than 10 million electron volts are presented. It is noted that the HST orbit causes it to spend about 15 percent of its time in the SAA, but that, unlike the experience with earlier spacecraft, the satellite's skin, internal structure, and normal electronic's packaging provides sufficient protection against eletrons, although some higher energy protons still get through. Various charged particle effects which can arise within scientific instruments including fluorescence, Cerenkov radiation, and induced radioactivity are described.

  17. Geology orbiter comparison study

    Science.gov (United States)

    Cutts, J. A. J.; Blasius, K. R.; Davis, D. R.; Pang, K. D.; Shreve, D. C.

    1977-01-01

    Instrument requirements of planetary geology orbiters were examined with the objective of determining the feasibility of applying standard instrument designs to a host of terrestrial targets. Within the basic discipline area of geochemistry, gamma-ray, X-ray fluorescence, and atomic spectroscopy remote sensing techniques were considered. Within the discipline area of geophysics, the complementary techniques of gravimetry and radar were studied. Experiments using these techniques were analyzed for comparison at the Moon, Mercury, Mars and the Galilean satellites. On the basis of these comparative assessments, the adaptability of each sensing technique was judged as a basic technique for many targets, as a single instrument applied to many targets, as a single instrument used in different mission modes, and as an instrument capability for nongeoscience objectives.

  18. El investigador como educador musical y como divulgador

    Directory of Open Access Journals (Sweden)

    Suárez-Pajares, Javier

    2000-05-01

    Full Text Available La presente ponencia trataba de plantear en la Mesa redonda "Investigación aplicada a la educación musical" una serie de problemas que surgen no tanto a quienes se dedican profesionalmente a la educación musical, sino a quienes, dedicados a la investigación y al estudio de temas relacionados con la historia de la música desde perspectivas diversas, tienen finalmente que transmitirlos a una audiencia determinada, ya sea otros colegas, alumnos de universidad, u otros públicos en los que se centra el concepto "divulgación" aludido en el título.Se incide particularmente en los problemas de la educación musical universitaria para no especialistas y en la divulgación científica aplicada a la música, un campo casi yermo sobre el que hay mucho que reflexionar: desde las nuevas posibilidades para la explicación de la música que ofrecen soportes nuevos como el CD-Rom, hasta las tradicionales formas de relación con un público melómano a través de notas a programas y críticas de conciertos.

  19. Orbit Determination Toolbox

    Science.gov (United States)

    Carpenter, James R.; Berry, Kevin; Gregpru. Late; Speckman, Keith; Hur-Diaz, Sun; Surka, Derek; Gaylor, Dave

    2010-01-01

    The Orbit Determination Toolbox is an orbit determination (OD) analysis tool based on MATLAB and Java that provides a flexible way to do early mission analysis. The toolbox is primarily intended for advanced mission analysis such as might be performed in concept exploration, proposal, early design phase, or rapid design center environments. The emphasis is on flexibility, but it has enough fidelity to produce credible results. Insight into all flight dynamics source code is provided. MATLAB is the primary user interface and is used for piecing together measurement and dynamic models. The Java Astrodynamics Toolbox is used as an engine for things that might be slow or inefficient in MATLAB, such as high-fidelity trajectory propagation, lunar and planetary ephemeris look-ups, precession, nutation, polar motion calculations, ephemeris file parsing, and the like. The primary analysis functions are sequential filter/smoother and batch least-squares commands that incorporate Monte-Carlo data simulation, linear covariance analysis, measurement processing, and plotting capabilities at the generic level. These functions have a user interface that is based on that of the MATLAB ODE suite. To perform a specific analysis, users write MATLAB functions that implement truth and design system models. The user provides his or her models as inputs to the filter commands. The software provides a capability to publish and subscribe to a software bus that is compliant with the NASA Goddard Mission Services Evolution Center (GMSEC) standards, to exchange data with other flight dynamics tools to simplify the flight dynamics design cycle. Using the publish and subscribe approach allows for analysts in a rapid design center environment to seamlessly incorporate changes in spacecraft and mission design into navigation analysis and vice versa.

  20. The conservation of orbital symmetry

    CERN Document Server

    Woodward, R B

    2013-01-01

    The Conservation of Orbital Symmetry examines the principle of conservation of orbital symmetry and its use. The central content of the principle was that reactions occur readily when there is congruence between orbital symmetry characteristics of reactants and products, and only with difficulty when that congruence does not obtain-or to put it more succinctly, orbital symmetry is conserved in concerted reaction. This principle is expected to endure, whatever the language in which it may be couched, or whatever greater precision may be developed in its application and extension. The book ope

  1. Homogeneous orbit closures and applications

    CERN Document Server

    Lindenstrauss, Elon

    2011-01-01

    We give new classes of examples of orbits of the diagonal group in the space of unit volume lattices in R^d for d > 2 with nice (homogeneous) orbit closures, as well as examples of orbits with explicitly computable but irregular orbit closures. We give Diophantine applications to the former, for instance we show that if x is the cubic root of 2 then for any y,z in R liminf |n|=0 (as |n| goes to infinity), where denotes the distance of a real number c to the integers.

  2. Orbit Alignment in Triple Stars

    Science.gov (United States)

    Tokovinin, Andrei

    2017-08-01

    The statistics of the angle Φ between orbital angular momenta in hierarchical triple systems with known inner visual or astrometric orbits are studied. A correlation between apparent revolution directions proves the partial orbit alignment known from earlier works. The alignment is strong in triples with outer projected separation less than ∼50 au, where the average Φ is about 20^\\circ . In contrast, outer orbits wider than 1000 au are not aligned with the inner orbits. It is established that the orbit alignment decreases with the increasing mass of the primary component. The average eccentricity of inner orbits in well-aligned triples is smaller than in randomly aligned ones. These findings highlight the role of dissipative interactions with gas in defining the orbital architecture of low-mass triple systems. On the other hand, chaotic dynamics apparently played a role in shaping more massive hierarchies. The analysis of projected configurations and triples with known inner and outer orbits indicates that the distribution of Φ is likely bimodal, where 80% of triples have {{Φ }}< 70^\\circ and the remaining ones are randomly aligned.

  3. Linfangioma orbitário: relato de caso Orbital lymphangioma: case report

    Directory of Open Access Journals (Sweden)

    Filipe José Pereira

    2010-02-01

    Full Text Available Descrevemos um caso de linfangioma orbitário em uma paciente de nove anos de idade que apresentava proptose à direita (Hertel= 29 mm, acompanhada de restrição da motilidade ocular, dor e perda visual decorrente de neuropatia óptica compressiva. A ressonância magnética demonstrou a lesão expansiva, localizada na órbita direita, de aspecto cístico, não infiltrativa, extraconal e com sinais sugestivos de hemorragia intralesional. Não houve melhora com corticoterapia oral. Foi, então, realizada punção via transconjuntival, com aspiração de 35 ml delíquido "cor-de-chocolate" (confirmado como hemorrágico pela citologia. Ocorreram exacerbações do quadro clínico, manifestadas por dor e piora da proptose, devido à hemorragia intralesional, optando-sepela exérese dos cistos orbitários, usando o acesso orbitário lateral (cantólise e retirada de parede orbitária lateral, a qual não foi recolocada para efeito de descompressão e inferior (transconjuntival inferior, com resolução do quadro. CONCLUSÃO: Foi relatado um caso de linfangioma, uma doença desafiadora, de difícil tratamento, com potenciais complicações visuais e estéticas, além da possibilidade de recidivas frequentes.A case of orbital lymphangioma in a 9 year-old female, with proptosis (Hertel= 29 mm, ocular motility restriction, pain and visual loss due to compressive optic neuropathy is described. A magnetic resonance imaging (MRI exam showed an expansive cystic lesion in the extraconal space of the right orbit, non-infiltrating with intralesional hemorrhage. The patient had no improvement with steroid treatment. A transconjunctival puncture with 35 ml aspiration of a "chocolate color" fluid (which was confirmed by cytologic study as a hemorrhagic fluid was performed. Exacerbations occurred after an intralesional hemorrhage (pain and increase of proptosis. The lesion was excised via lateral cutaneous approach (a lateral canthotomy and removal of the right

  4. New orbit correction method uniting global and local orbit corrections

    Science.gov (United States)

    Nakamura, N.; Takaki, H.; Sakai, H.; Satoh, M.; Harada, K.; Kamiya, Y.

    2006-01-01

    A new orbit correction method, called the eigenvector method with constraints (EVC), is proposed and formulated to unite global and local orbit corrections for ring accelerators, especially synchrotron radiation(SR) sources. The EVC can exactly correct the beam positions at arbitrarily selected ring positions such as light source points, simultaneously reducing closed orbit distortion (COD) around the whole ring. Computer simulations clearly demonstrate these features of the EVC for both cases of the Super-SOR light source and the Advanced Light Source (ALS) that have typical structures of high-brilliance SR sources. In addition, the effects of errors in beam position monitor (BPM) reading and steering magnet setting on the orbit correction are analytically expressed and also compared with the computer simulations. Simulation results show that the EVC is very effective and useful for orbit correction and beam position stabilization in SR sources.

  5. PyORBIT: A Python Shell For ORBIT

    Energy Technology Data Exchange (ETDEWEB)

    Jean-Francois Ostiguy; Jeffrey Holmes

    2003-07-01

    ORBIT is code developed at SNS to simulate beam dynamics in accumulation rings and synchrotrons. The code is structured as a collection of external C++ modules for SuperCode, a high level interpreter shell developed at LLNL in the early 1990s. SuperCode is no longer actively supported and there has for some time been interest in replacing it by a modern scripting language, while preserving the feel of the original ORBIT program. In this paper, we describe a new version of ORBIT where the role of SuperCode is assumed by Python, a free, well-documented and widely supported object-oriented scripting language. We also compare PyORBIT to ORBIT from the standpoint of features, performance and future expandability.

  6. Orbital Chondroma: A rare mesenchymal tumor of orbit

    Directory of Open Access Journals (Sweden)

    Ruchi S Kabra

    2015-01-01

    Full Text Available While relatively common in the skeletal system, cartilaginous tumors are rarely seen originating from the orbit. Here, we report a rare case of an orbital chondroma. A 27-year-old male patient presented with a painless hard mass in the superonasal quadrant (SNQ of left orbit since 3 months. On examination, best-corrected visual acuity of both eyes was 20/20, with normal anterior and posterior segment with full movements of eyeballs and normal intraocular pressure. Computerized tomography scan revealed well defined soft tissue density lesion in SNQ of left orbit. Patient was operated for anteromedial orbitotomy under general anesthesia. Mass was excised intact and sent for histopathological examination (HPE. HPE report showed lobular aggregates of benign cartilaginous cells with mild atypia suggesting of benign cartilaginous tumor - chondroma. Very few cases of orbital chondroma have been reported in literature so far.

  7. El plomo como contaminante alimentario

    Directory of Open Access Journals (Sweden)

    C. Rubio

    2004-01-01

    Full Text Available El plomo es un metal pesado caracterizado por ocasionar efectos tóxicos sobre el tracto gastrointestinal, sobre el sistema renal y sobre el SNC y periférico, así como interferencias con sistemas enzimáticos implicados en la síntesis del grupo hemo. A pesar de que en los últimos diez años, los contenidos de plomo de los productos alimenticios se han reducido sensiblemente gracias a los esfuerzos realizados para reducir la emisión de plomo en su origen y por los progresos en la garantía de calidad de los análisis químicos, la dieta sigue siendo una fuente importante de exposición de plomo. Es por ello que, el objetivo a largo plazo de las autoridades sanitarias es el de continuar reduciendo los contenidos medios de plomo en los productos alimenticios con el fin de que las ingestas medias dietéticas de Pb de las poblaciones cumplan con la PTWI (Provisional Tolerable Weekly Intake de 25 µg Pb/Kg/semana establecida por el Comité Mixto FAO/OMS

  8. La Justicia como valor Constitucional

    Directory of Open Access Journals (Sweden)

    Lavilla Alsina, Landelino

    2003-07-01

    Full Text Available La Constitución Española, sin menoscabo de su carácter prescriptivo, atiende a la necesidad de poner un vigoroso acento —y mejor si lo hace en términos jurídicos— sobre las notas identificadoras del aliento político que más y mejor expresan el fundamento y orientación de la voluntad constituyente. Pero, con independencia de tal aseveración, es definitiva la interpretación del precepto, según criterios y métodos jurídicos, en cuanto enuncia unos «valores» que el Estado constituido «propugna», que se califican como «superiores» y que se predican, precisamente, del «ordenamiento jurídico». La justicia es, desde luego y en sí misma, un valor, al que conviene la nota de clásico en la determinación de los que han de regir una convivencia política estable. Uno u otro sentido de la justicia ha latido con fuerza en la conciencia humana y en toda pretensión racional de ordenación de la convivencia.

  9. Diplopia and orbital wall fractures

    NARCIS (Netherlands)

    Boffano, P.; Roccia, F.; Gallesio, C.; Karagozoglu, K.H.; Forouzanfar, T.

    2014-01-01

    Diplopia is a symptom that is frequently associated with orbital wall fractures. The aim of this article was to present the incidence and patterns of diplopia after orbital wall blow-out fractures in 2 European centers, Turin and Amsterdam, and to identify any correlation between this symptom and su

  10. [Enophthalmos in an orbital tumor].

    Science.gov (United States)

    Szabo, Bianca; Szabo, I; Nicula, Cristina; Popescu, Livia Adriana

    2013-01-01

    Enophtalmus is an unusual sign of the orbital tumors often represented by proptosis. One patient with enophtalmus and intraorbital tumor and aplasy is presented. The treatment of choice of orbital tumor is complete surgical excision and careful follow-up. Considering the more aggressive course followed by recurrent tumor, correct diagnosis and management is essential.

  11. Diffractive molecular-orbital tomography

    Science.gov (United States)

    Zhai, Chunyang; Zhu, Xiaosong; Lan, Pengfei; Wang, Feng; He, Lixin; Shi, Wenjing; Li, Yang; Li, Min; Zhang, Qingbin; Lu, Peixiang

    2017-03-01

    High-order-harmonic generation in the interaction of femtosecond lasers with atoms and molecules opens the path to molecular-orbital tomography and to probe the electronic dynamics with attosecond-Ångström resolutions. Molecular-orbital tomography requires both the amplitude and phase of the high-order harmonics. Yet the measurement of phases requires sophisticated techniques and represents formidable challenges at present. Here we report a scheme, called diffractive molecular-orbital tomography, to retrieve the molecular orbital solely from the amplitude of high-order harmonics without measuring any phase information. We have applied this method to image the molecular orbitals of N2, CO2, and C2H2 . The retrieved orbital is further improved by taking account the correction of Coulomb potential. The diffractive molecular-orbital tomography scheme, removing the roadblock of phase measurement, significantly simplifies the molecular-orbital tomography procedure and paves an efficient and robust way to the imaging of more complex molecules.

  12. GridOrbit public display

    DEFF Research Database (Denmark)

    Ramos, Juan David Hincapie; Tabard, Aurélien; Bardram, Jakob

    2010-01-01

    We introduce GridOrbit, a public awareness display that visualizes the activity of a community grid used in a biology laboratory. This community grid executes bioin-formatics algorithms and relies on users to donate CPU cycles to the grid. The goal of GridOrbit is to create a shared awareness about...

  13. Diplopia and orbital wall fractures

    NARCIS (Netherlands)

    Boffano, P.; Roccia, F.; Gallesio, C.; Karagozoglu, K.H.; Forouzanfar, T.

    2014-01-01

    Diplopia is a symptom that is frequently associated with orbital wall fractures. The aim of this article was to present the incidence and patterns of diplopia after orbital wall blow-out fractures in 2 European centers, Turin and Amsterdam, and to identify any correlation between this symptom and

  14. Low Earth Orbiter: Terminal

    Science.gov (United States)

    Kremer, Steven E.; Bundick, Steven N.

    1999-01-01

    In response to the current government budgetary environment that requires the National Aeronautics and Space Administration (NASA) to do more with less, NASA/Goddard Space Flight Center's Wallops Flight Facility has developed and implemented a class of ground stations known as a Low Earth Orbiter-Terminal (LEO-T). This development thus provides a low-cost autonomous ground tracking service for NASA's customers. More importantly, this accomplishment provides a commercial source to spacecraft customers around the world to purchase directly from the company awarded the NASA contract to build these systems. A few years ago, NASA was driven to provide more ground station capacity for spacecraft telemetry, tracking, and command (TT&C) services with a decreasing budget. NASA also made a decision to develop many smaller, cheaper satellites rather than a few large spacecraft as done in the past. In addition, university class missions were being driven to provide their own TT&C services due to the increasing load on the NASA ground-tracking network. NASA's solution for this ever increasing load was to use the existing large aperture systems to support those missions requiring that level of performance and to support the remainder of the missions with the autonomous LEO-T systems. The LEO-T antenna system is a smaller, cheaper, and fully autonomous unstaffed system that can operate without the existing NASA support infrastructure. The LEO-T provides a low-cost, reliable space communications service to the expanding number of low-earth orbiting missions around the world. The system is also fostering developments that improve cost-effectiveness of autonomous-class capabilities for NASA and commercial space use. NASA has installed three LEO-T systems. One station is at the University of Puerto Rico, the second system is installed at the Poker Flat Research Range near Fairbanks, Alaska, and the third system is installed at NASA's Wallops Flight Facility in Virginia. This paper

  15. Video Orbits of the Geminids

    Science.gov (United States)

    Hajdukova, M.

    2014-07-01

    Geminid meteoroids, observed by the video technique, were analysed with the aim of determining the actual dispersion of their reciprocal semimajor axes 1/a within the stream. Orbits were selected from the European Video Meteor Network Database, EDMOND, (Kornos et al., 2013), from the SonotaCo Shower Catalogue (SonotaCo, 2009), and from the Czech Catalogue of Video Meteor Orbits (Koten et al., 2003). The observed orbital dispersion, including the measurement errors, was compared with that obtained from the precisely-reduced photographic orbits of Geminids from the IAU Meteor Data Center (Lindblad et al., 2003). In this paper, we concentrate on the influence of errors on the orbital dispersion. The size and distribution of observational errors determined from the long-period meteoroid streams (Hajdukova 2013), were applied to determine the real dispersion within this short-period meteoroid stream. The observed dispersions, described by the median absolute deviation in terms of 1/a, range from 0.041 to 0.050 1/au. The deviation of the median reciprocal semimajor axis from the parent (3200) Phaethon, obtained from Japanese video orbits, is 0.009 1/au, and that from the EDMOND data 0.01 1/au. This deviation obtained from the photographic orbits of the IAU Meteor Data Center was significantly greater (Hajdukova 2009). Similar results were obtained from the Czech Video Orbits Catalogue, where the value is 0.05 1/au. The investigation showed that semimajor axes of meteor orbits in both the SonotaCo and EDMOND datasets are systematically biased as a consequence of the method used for the video orbit determination, probably because corrections for atmospheric deceleration were either incorrectly made or were not done at all. Thus, the determined heliocentric velocities are underestimated, and the semimajor axes medians shifted towards smaller values. The observed distributions in 1/a from these video data become biased towards higher values of 1/a. The orbits of the Geminid

  16. Measuring Scars of Periodic Orbits

    CERN Document Server

    Kaplan, L

    1999-01-01

    The phenomenon of periodic orbit scarring of eigenstates of classically chaotic systems is attracting increasing attention. Scarring is one of the most important ``corrections'' to the ideal random eigenstates suggested by random matrix theory. This paper discusses measures of scars and in so doing also tries to clarify the concepts and effects of eigenfunction scarring. We propose a new, universal scar measure which takes into account an entire periodic orbit and the linearized dynamics in its vicinity. This measure is tuned to pick out those structures which are induced in quantum eigenstates by unstable periodic orbits and their manifolds. It gives enhanced scarring strength as measured by eigenstate overlaps and inverse participation ratios, especially for longer orbits. We also discuss off-resonance scars which appear naturally on either side of an unstable periodic orbit.

  17. The 2009 Mars Telecommunications Orbiter

    Science.gov (United States)

    Wilson, G. R.; Depaula, R.; Diehl, R. E.; Edwards, C. D.; Fitzgerald, R. J.; Franklin, S. F.; Gibbs, R. G.; Kerridge, S. A.; Komarek, T. A.; Noreen, G. K.

    The first spacecraft with a primary function of providing communication links while orbiting a foreign planet has begun development for a launch in 2009. NASA's Mars Telecommunications Orbiter would use three radio bands to magnify the benefits of other future Mars missions and enable some types of missions otherwise impractical. It would serve as the Mars hub for a growing interplanetary Internet. And it would pioneer the use of planet-to-planet laser communications to demonstrate the possibility for even great networking capabilities in the future. During its nearly 10-year mission in orbit, Mars Telecommunications Orbiter would aid navigation of arriving spacecraft to their martian landing sites and monitor critical events during landings and orbit insertions. In addition, it would enable data-transmission volumes great enough to bring a virtual Mars presence to the public through a range of Internet and video features.

  18. Halo orbit to science orbit captures at planetary moons

    Science.gov (United States)

    Bokelmann, Kevin A.; Russell, Ryan P.

    2017-05-01

    Ballisticly connecting halo orbits to science orbits in the circular-restricted three-body problem is investigated. Two classes of terminal science orbits are considered: low-altitude, tight orbits that are deep in the gravity well of the secondary body, and high-altitude, loose orbits that are strongly perturbed by the gravity of the primary body. General analytic expressions are developed to provide a minimum bound on impulse cost in both the circular restricted and the Hill's approximations. The equations are applied to a broad range of planetary moons, providing a mission design reference. Systematic grid search methods are developed to numerically find feasible transfers from halo orbits at Europa, confirming the analytical lower bound formulas. The two-impulse capture options in the case of Europa reveal a diverse set of potential solutions. Tight captures result in maneuver costs of 425-550 m/s while loose captures are found with costs as low as 30 m/s. The terminal orbits are verified to avoid escape or impact for at least 45 days.

  19. VSOP-2 Orbit Determination

    Science.gov (United States)

    Takeuchi, H.; VSOP-2 Orbit Determination Sub-Working Group

    2009-08-01

    Precise orbit determination (POD) is a key factor to enable phase referencing observations with Astro-G. A POD accuracy of 30 cm is required for efficient X-band phase referencing observations, accuracy of 6 cm for K-band observations, and accuracy of 3 cm for Q-band observations. For the POD, Astro-G will be equipped with a GPS/Galileo receiver and a SLR (Satellite Laser Ranging) retroreflector array. Four POD antennas will be equipped on four sides of the satellite body, to cover all directions. The SLR will be used as a complement to the GPS at middle-to-high altitude. Because the refroreflector array should always face to the Earth direction, it will be set up on the Ka-link antenna gimbal. The most significant perturbing force for the Astro-G is solar radiation pressure (SRP). The reflectivity of each surface component should be preliminary measured in detail to model the SRP. The estimated achievable POD accuracy at apogee is 10 ˜ 30 cm in nominal case. Phase referencing observations in K- or Q-band can be performed if the enough amount of SLR tracking data can be obtained at high altitudes.

  20. Hydrogenoid orbitals revisited: From Slater orbitals to Coulomb Sturmians

    Indian Academy of Sciences (India)

    Danilo Calderini; Simonetta Cavalli; Cecilia Coletti; Gaia Grossi; Vincenzo Qquilanti

    2012-01-01

    The simple connection between the Slater orbitals, venerable in quantum chemistry, and the Coulomb Sturmian orbitals, more recently employed in atomic and molecular physics, is pointed out explicitly in view of the renewed interest in both as basis sets in applied quantum mechanics. Research in Slater orbitals mainly concerns multicentre, many-body integrals, whereas that on Sturmians exploits their orthonormality and completeness with no need of continuum states. An account of recent progress is outlined, also with reference to relationships between the two basis sets, and with the momentum space and hyperspherical harmonics representations.

  1. Los videojuegos como objetos desarrolladores de aprendizaje

    OpenAIRE

    Rojas Rusinque, Claudia Victoria; Gómez Sánchez, Ligda; Guarnizo Pinto, María Isabel

    2014-01-01

    El principal objetivo de este proyecto, es valorar el uso y apropiación de los videojuegos como objetos desarrolladores de aprendizaje; así como, analizar el uso de los videojuegos como medio de alfabetización; reconocer las diferentes características de los videojuegos, diseñar una ruta de videojuegos que amplíe la visión del maestro en la utilización de herramientas pedagógicas

  2. Como responder ao momento presente?

    Directory of Open Access Journals (Sweden)

    Maria Filomena Molder

    2013-12-01

    Full Text Available http://dx.doi.org/10.5007/1984-784X.2013v13n19p13 Foi com esta pergunta — já um efeito de um primeiro encontro entre Irene Pimentel e eu própria — que decidimos desafiar colegas, estudantes e funci­onários da nossa Faculdade, FCSH (Faculdade de Ciências Sociais e Huma­nas, de outras Faculdades da Universidade Nova de Lisboa, de outras Uni­versidades e todos os interessados em con­siderar e discutir em comum aquilo que se passava em Portugal e que no anúncio da Jornada de 6 de De­zembro de 2012 se descrevia como um “processo de desmantela­mento social, económico e cultural sem precedentes — pese embora tantas compara­ções, baseadas na premissa da ‘eterna repetição’ — e cujas consequências não param de exceder as previsões dos responsáveis por esse desmantelamento”. Acedendo com todo o empenho e gratidão ao convite que me foi dirigido por Humberto Brito para fazer uma resenha da Jornada a publicar no primeiro número de Forma de Vida (saúdo a revista e o título, decidi-me, no entanto, a pôr de lado a resenha, que sob a forma de “Editorial” será em breve publi­cada no blogue Responder ao Momento Presente, entre­tanto criado, conjuntamente com os textos escritos pelos nossos convidados, com as parti­cipações de pessoas que corresponderam ao nosso apelo e ainda com contri­bui­ções que se alargaram para lá da Jornada; a que se juntará uma gravação em video, também disponível no Youtube.   Texto publicado originalmente em Forma de Vida, Lisboa, n.1, fev. 2013. Agrade­cemos à autora por permitir a republicação neste número do Boletim. [N.E.

  3. La lengua inglesa como neolengua

    Directory of Open Access Journals (Sweden)

    Fernando BELTRÁN LLAVADOR

    2009-11-01

    Full Text Available RESUMEN: El artículo examina algunos usos y abusos de la lengua inglesa en la actualidad en el contexto de la globalización. Se define la neolengua, se ofrecen similitudes de la misma en el lenguaje publicitario en España, se trazan sus orígenes y se apuntan algunos antecedentes en la historia de la literatura inglesa, al tiempo que se ilustran ejemplos de variantes contemporáneas de la misma bajo la denominación de «nukespeak», especialmente abundantes en el discurso de los conflictos bélicos. La lengua inglesa está indisociablemente unida a complejos factores de orden económico, tecnológico y cultural que afectan a su misma morfología. Por otra parte, la presencia ubicua de la lengua inglesa, como idioma global, opera sobre las estructuras de sentimiento, pensamiento y acción de los ciudadanos en todo el mundo. Para los profesionales de la enseñanza del idioma inglés, ello comporta la obligación de discernir y resistir sus efectos potencialmente perversos al tiempo que siguen promoviendo sus valiosos beneficios culturales.ABSTRACT: Contemporary uses and abuses of the English language are examined in the context of complex issues and globalization trends. The term «newspeak» is defined, similitudes of it are found today in the language of advertising in Spain, its origins are traced back and antecedents are located in the history of English literature, while the presence of new modalities of the Orwellian reductionist language, such as «nukespeak», is illustrated within the language of warfare. The English language is inextricably bound up with economical, technological and cultural factors which affect its very morphology just as much as the pervasive influence of English as a global language affects the structures of feeling, thought and action of citizens all over the world, which poses an obligation on the part of EFL teachers to discern and resist its ill effects while they promote its still highly valuable cultural

  4. Como responder ao momento presente?

    Directory of Open Access Journals (Sweden)

    Maria Filomena Molder

    2013-06-01

    Full Text Available Foi com esta pergunta — já um efeito de um primeiro encontro entre Irene Pimentel e eu própria — que decidimos desafiar colegas, estudantes e funci­onários da nossa Faculdade, FCSH (Faculdade de Ciências Sociais e Huma­nas, de outras Faculdades da Universidade Nova de Lisboa, de outras Uni­versidades e todos os interessados em con­siderar e discutir em comum aquilo que se passava em Portugal e que no anúncio da Jornada de 6 de De­zembro de 2012 se descrevia como um “processo de desmantela­mento social, económico e cultural sem precedentes — pese embora tantas compara­ções, baseadas na premissa da ‘eterna repetição’ — e cujas consequências não param de exceder as previsões dos responsáveis por esse desmantelamento”. Acedendo com todo o empenho e gratidão ao convite que me foi dirigido por Humberto Brito para fazer uma resenha da Jornada a publicar no primeiro número de Forma de Vida (saúdo a revista e o título, decidi-me, no entanto, a pôr de lado a resenha, que sob a forma de “Editorial” será em breve publi­cada no blogue Responder ao Momento Presente, entre­tanto criado, conjuntamente com os textos escritos pelos nossos convidados, com as parti­cipações de pessoas que corresponderam ao nosso apelo e ainda com contri­bui­ções que se alargaram para lá da Jornada; a que se juntará uma gravação em video, também disponível no Youtube. Texto publicado originalmente em Forma de Vida, Lisboa, n.1, fev. 2013. Agrade­cemos à autora por permitir a republicação neste número do Boletim. [N.E.

  5. SPHERES Mars Orbiting Sample Return External Orbiting Capture Project

    Data.gov (United States)

    National Aeronautics and Space Administration — NASA's Mars Sample Return (MSR) mission scenario utilizes a small Orbiting Sample (OS) satellite, launched from the surface of Mars, which will rendezvous with an...

  6. Orbital Infarction due to Sickle Cell Disease without Orbital Pain

    Directory of Open Access Journals (Sweden)

    Cameron L. McBride

    2016-01-01

    Full Text Available Sickle cell disease is a hemoglobinopathy that results in paroxysmal arteriolar occlusion and tissue infarction that can manifest in a plurality of tissues. Rarely, these infarcted crises manifest in the bony orbit. Orbital infarction usually presents with acute onset of periorbital tenderness, swelling, erythema, and pain. Soft tissue swelling can result in proptosis and attenuation of extraocular movements. Expedient diagnosis of sickle cell orbital infarction is crucial because this is a potentially sight-threatening entity. Diagnosis can be delayed since the presentation has physical and radiographic findings mimicking various infectious and traumatic processes. We describe a patient who presented with sickle cell orbital crisis without pain. This case highlights the importance of maintaining a high index of suspicion in patients with known sickle cell disease or of African descent born outside the United States in a region where screening for hemoglobinopathy is not routine, even when the presentation is not classic.

  7. [Orbital tumor emergencies in childhood].

    Science.gov (United States)

    Morax, S; Desjardins, L

    2009-05-01

    Emergencies in childhood orbital tumorals are rare. The absolute emergency involves malignant primary orbital tumors, such as rhabdomyosarcoma or secondary malignant tumors (metastatic neuroblastoma, leukemia), involving a vital prognosis requiring prompt diagnosis. Delayed emergencies are usually vascular lesions. Among these lesions, immature orbital hemangioma, with a good prognosis, must be distinguished from orbital adnexal lymphangiomas, which are less frequent but can lead to dramatic cosmetic and functional disorders. In rare cases, they can be responsible for sudden, painful proptosis, due to orbital hemorrhage, with a risk of optic nerve compression, requiring emergency surgical treatment. Neurogenous lesions, either isolated, such as in gliomas, or associated with a systemic disease, such as Recklinghausen neurofibromatosis, threaten the functional prognosis. Diagnosis of pediatric orbital tumors is based on a good clinical examination, precise imaging investigations, and evaluation of the locoregional extension of the tumor. Biopsy is required in emergency situations, when rhabdomyosarcoma is suspected, in order to start the chemotherapy. However, the biopsy can be superfluous, and even useless or dangerous, when clinical and imaging investigations are sufficient to provide a diagnosis of capillary hemangioma, lymphangioma, or metastatic tumor from an abdominal malignancy. Treatment is closely related to the etiopathogenesis of the tumor. The outcomes are vital, functional and cosmetic. They may require orbital surgery (biopsy, tumoral resection, orbital decompression in case of a compressive hemorrhage), systemic corticotherapy (as in immature adnexal hemangioma), radiation, and chemotherapy (rhabdomyosarcoma, secondary malignant tumor). These diseases require a pediatric ophthalmological medical center specializing in orbital surgery, with close collaboration of multiple specialists such as onco-pediatricians and neurosurgeons.

  8. Ocular complications of orbital venography.

    Science.gov (United States)

    Safer, J N; Guibor, P

    1975-03-01

    Three ocular complications directly related to orbital venography are described, one resulting in permanent loss of vision,. The patient had lymphangioma of the orbit which evidently had bled secondary to increased venous pressure and injection of contrast bolus. Both of the 2 patients with transient visual disturbances had diabetic retinopathy. The common factor is felt to be an imparied vascular bed which cannot meet the stress of increased venous pressure and contrast medium injection. Conditions which predispose to ocular-orbital stasis and/or hemorrhage are discussed.

  9. Modelo computacional para o gerenciamento de dados e exames de pacientes para o acompanhamento remoto por meio de conferência multimídia Computational model for data and patients' exams management for remote follow-up by multimedia conferences

    Directory of Open Access Journals (Sweden)

    Huei Diana Lee

    2010-12-01

    Full Text Available OBJETIVO: Desenvolver um modelo computacional para aquisição, gerenciamento e armazenamento de dados e exames de pacientes, e definir uma arquitetura de conferência multimídia para o acompanhamento remoto de exames. MATERIAIS E MÉTODOS: Definiu-se uma arquitetura computacional para a aquisição de exames a partir de equipamentos hospitalares, e para o armazenamento e gerenciamento de dados e exames de pacientes foram utilizados o servidor de aplicações Jboss, o sistema gerenciador de banco de dados MySQL, o servidor de páginas Apache e o framework Jboss-Seam para o desenvolvimento de aplicações. Para a conferência multimídia, foi aplicado um estudo de caso utilizando a arquitetura Openmeetings. RESULTADOS: Foram definidos modelos computacionais para o gerenciamento consistente e seguro de dados e exames de pacientes e estudou-se uma arquitetura para conferência multimídia. CONCLUSÃO: Os modelos computacionais, o protótipo implementado e a arquitetura de conferência multimídia avaliada poderão ser aplicados em situações reais da área médica, contribuindo para o acompanhamento remoto de pacientes.OBJECTIVE: To develop a computational model for acquisition, management and storing data and patients' exams, and to define a multimedia conference architecture to remote patients' follow-up. MATERIALS AND METHODS: A computational architecture was defined to acquire exams' information from hospital equipment and to store and manage patients' data and exams using the JBoss application server, the MySql database manager system, the Apache web page server and the Jboss Seam framework for application development. For multimedia conference, a case study using the Openmeetins architecture was performed. RESULTS: computational models intended to the consistent and safe management of data and patients' exams were defined and a multimedia conference architecture was studied. CONCLUSION: The computational models, the prototype developed and

  10. CODIMENSION 3 BIFURCATIONS OF HOMOCLINIC ORBITS WITH ORBIT FLIPS AND INCLINATION FLIPS

    Institute of Scientific and Technical Information of China (English)

    SHUI SHULIANG; ZHU DEMING

    2004-01-01

    The homoclinic bifurcations in four dimensional vector fields are investigated by setting up a local coordinates near the homoclinic orbit. This homoclinic orbit is nonprincipal in the meanings that its positive semi-orbit takes orbit flip and its unstable foliation takes inclination flip. The existence, nonexistence, uniqueness and coexistence of the 1-homoclinic orbit and the 1-periodic orbit are studied. The existence of the twofold periodic orbit and three-fold periodic orbit are also obtained.

  11. Review "Derecho y salud como realidades interactivas"

    OpenAIRE

    Vivas, Marcelo Dayrell

    2015-01-01

    Review "DERECHO Y SALUD COMO REALIDADES INTERACTIVAS" (Jorge Tomillo Urbina e Joaquín Cayón de Las Cuevas (Coord.), Aranzadi, Espanha, 2015) Resenha sobre a publicação "DERECHO Y SALUD COMO REALIDADES INTERACTIVAS", de Jorge Tomillo Urbina e Joaquín Cayón de Las Cuevas (Coord.) (Aranzadi, Espanha, 2015)

  12. Real and Hybrid Atomic Orbitals.

    Science.gov (United States)

    Cook, D. B.; Fowler, P. W.

    1981-01-01

    Demonstrates that the Schrodinger equation for the hydrogenlike atom separates in both spheroconal and prolate spheroidal coordinates and that these separations provide a sound theoretical basis for the real and hybrid atomic orbitals. (Author/SK)

  13. [Orbital metastasis in malignant melanoma].

    Science.gov (United States)

    Pedroli, G L; Hamedani, M; Barraco, P; Oubaaz, A; Morax, S

    2001-03-01

    We report the case of a 60-year-old man presenting bilateral progressive proptosis with diplopia, weight loss, tachycardia, nervosity, and stomach pain. These signs seemed at first to favor a diagnosis of Graves'ophthalmopathy. Thyroid tests were negative and the initial orbital CT scan was considered normal. A new radiological investigation 4 months later in our hospital revealed typical hypertrophy of the extraocular muscles compatible with orbital metastasis. The systemic investigations demonstrated a pulmonary tumor, multiple hepatic lesions, and several pigmented nodules of gastric mucosa. The pathology of pulmonary and gastric specimens confirmed the diagnosis of malignant melanoma. The primary lesion remains unknown. The authors discuss the differential diagnoses of orbital metastasis and the radiological characteristics of orbital metastasis in malignant melanoma.

  14. NASA Orbital Debris Baseline Populations

    Science.gov (United States)

    Krisko, Paula H.; Vavrin, A. B.

    2013-01-01

    The NASA Orbital Debris Program Office has created high fidelity populations of the debris environment. The populations include objects of 1 cm and larger in Low Earth Orbit through Geosynchronous Transfer Orbit. They were designed for the purpose of assisting debris researchers and sensor developers in planning and testing. This environment is derived directly from the newest ORDEM model populations which include a background derived from LEGEND, as well as specific events such as the Chinese ASAT test, the Iridium 33/Cosmos 2251 accidental collision, the RORSAT sodium-potassium droplet releases, and other miscellaneous events. It is the most realistic ODPO debris population to date. In this paper we present the populations in chart form. We describe derivations of the background population and the specific populations added on. We validate our 1 cm and larger Low Earth Orbit population against SSN, Haystack, and HAX radar measurements.

  15. Quark spin-orbit correlations

    CERN Document Server

    Lorcé, Cédric

    2014-01-01

    The proton spin puzzle issue focused the attention on the parton spin and orbital angular momentum contributions to the proton spin. However, a complete characterization of the proton spin structure requires also the knowledge of the parton spin-orbit correlation. We showed that this quantity can be expressed in terms of moments of measurable parton distributions. Using the available phenomenological information about the valence quarks, we concluded that this correlation is negative, meaning that the valence quark spin and kinetic orbital angular momentum are, in average, opposite. The quark spin-orbit correlation can also be expressed more intuitively in terms of relativistic phase-space distributions, which can be seen as the mother distributions of the standard generalized and transverse-momentum dependent parton distributions. We present here for the first time some examples of the general multipole decomposition of these phase-space distributions.

  16. ORBITAL MANIFESTATIONS OF SINUS DISEASE

    Directory of Open Access Journals (Sweden)

    Jyothirmayi

    2015-01-01

    Full Text Available AIM : To study the orbital manifestations in patients with sinus disease. METHODS : Patients wit h paranasal sinus disease presenting to OPD at Government ENT Hospital, AMC, Visakhapatnam from January 2012 to June 2014 were screened for orbital manifestations. Out of these, thirteen patients with orbital disease were referred to GREH, AMC, Visakhapatn am and were thoroughly investigated and managed appropriately. RESULTS : Out of the 14 patients 4 were female and 10 were male. Age ranged from 19 years to 70 years. 5 had maxillary sinus disease (4 - carcinoma and 1 case of mucormycosis. Frontal sinus dis ease was seen in two patients, one fibrous dysplasia and one malignancy. Five patients had ethmoidal sinus disease of which three patients were found to have ethmoidal sinus tumour (Malignant melanoma, Squamous cell Carcinoma. More than two sinuses were i nvolved in 2 patients. CONCLUSIONS : Early screening of patients with sinus disease by an Ophthalmologist can help in preventing severe vision threatening orbital complications.

  17. Closed Orbits in Phase Space

    Science.gov (United States)

    Murphy, Andrew; Haestad, Jace; Morgan, Thomas

    2015-09-01

    We report characteristics of closed classical orbits in an electric field in phase space produced in photoabsorption. Rydberg states of atomic and molecular hydrogen and helium are considered. The core potential used for the hydrogen molecule is an effective one electron one center core potential evaluated at the internuclear equilibrium distance. Poincare surfaces of section in phase space are generated by integrating the equations of motion in semiparabolic coordinates u = (r + z) 1 / 2 and v = (r - z) 1 / 2, and plotting the location in phase space (pv versus v) whenever u = 0, with the electric field in the z direction. Combination orbits produced by Rydberg electron core scattering are studied and the evolution in phase space of these combination orbits due to scattering from one closed orbit into another is investigated. Connections are made to measured laser photoabsorption experiments that excite Rydberg states (20 recurrence spectra. The phase space structures responsible for the spectra are identified.

  18. A Case of Orbital Histoplasmosis.

    Science.gov (United States)

    Krakauer, Mark; Prendes, Mark Armando; Wilkes, Byron; Lee, Hui Bae Harold; Fraig, Mostafa; Nunery, William R

    2016-01-01

    Histoplasma capsulatum var capsulatum is a dimorphic fungus endemic to the Ohio and Mississippi River Valleys of the United States. In this case report, a 33-year-old woman who presented with a right orbital mass causing progressive vision loss, diplopia, and facial swelling is described. Lateral orbitotomy with lateral orbital wall bone flap was performed for excisional biopsy of the lesion. The 1.5 × 1.8 × 2.3 cm cicatricial mass demonstrated a granulomatous lesion with necrosis and positive staining consistent with Histoplasma capsulatum var capsulatum infection. To the authors' knowledge, this is the first case of orbital histoplasmosis to be reported in the United States and the first case worldwide of orbital histoplasmosis due to Histoplasma capsulatum var capsulatum.

  19. Formation around planetary displaced orbit

    Institute of Scientific and Technical Information of China (English)

    GONG Sheng-ping; LI Jun-feng; BAOYIN He-xi

    2007-01-01

    The paper investigates the relative motion around the planetary displaced orbit. Several kinds of displaced orbits for geocentric and martian cases were discussed. First, the relative motion was linearized around the displaced orbits. Then, two seminatural control laws were investigated for each kind of orbit and the stable regions were obtained for each case. One of the two control laws is the passive control law that is very attractive for engineering practice. However, the two control laws are not very suitable for the Martian mission. Another special semi-natural control law is designed based on the requirement of the Martian mission. The results show that large stable regions exist for the control law.

  20. Orbital entanglement in quantum chemistry

    CERN Document Server

    Boguslawski, Katharina

    2014-01-01

    The basic concepts of orbital entanglement and its application to chemistry are briefly reviewed. The calculation of orbital entanglement measures from correlated wavefunctions is discussed in terms of reduced $n$-particle density matrices. Possible simplifications in their evaluation are highlighted in case of seniority-zero wavefunctions. Specifically, orbital entanglement allows us to dissect electron correlation effects in its strong and weak contributions, to determine bond orders, to assess the quality and stability of active space calculations, to monitor chemical reactions, and to identify points along the reaction coordinate where electronic wavefunctions change drastically. Thus, orbital entanglement represents a useful and intuitive tool to interpret complex electronic wavefunctions and to facilitate a qualitative understanding of electronic structure and how it changes in chemical processes.

  1. How to Orbit the Earth.

    Science.gov (United States)

    Quimby, Donald J.

    1984-01-01

    Discusses the geometry, algebra, and logic involved in the solution of a "Mindbenders" problem in "Discover" magazine and applies it to calculations of satellite orbital velocity. Extends the solution of this probe to other applications of falling objects. (JM)

  2. Orbital mechanics near Lagrange's points

    OpenAIRE

    Utashima, Masayoshi; 歌島 昌由

    1997-01-01

    The first libration-point satellite ISEE-3 (International Sun-Earth Explorer-3) was launched in 1978. Though, no libration-point satellites were realized after the launch of the ISEE-3, NASA launched the ESA's Solar and Heliospheric Observatory (SOHO) spacecraft into the halo orbit in the sun-earth system in late 1995. The halo orbit in the sun-earth system is adequate for missions such as solar observation, astronomical observation, NEO (Near Earth Objects) observation, communications with t...

  3. Orbit Determination Analysis for SSAPurposes

    OpenAIRE

    2015-01-01

    Space Situational Awareness (SSA) is the characterization of the space environmentand of space activities. The fundament of SSA is the access to information about theorbit of space objects. There exist several techniques to determine the orbit of objects inspace, both from space-based and from ground-based observations. This Master's Thesisproject aims at investigating orbit determinations from ground-based radar observations.In particular, the use of the EISCAT Ultra-High-Frequency (UHF) inc...

  4. Orbits in a logarithmic potential

    Energy Technology Data Exchange (ETDEWEB)

    Hooverman, R. H.

    2014-04-15

    The characteristics of charged particle orbits in the logarithmic electrostatic potential field surrounding a straight conducting wire at a fixed potential are investigated. The equations of motion of an electron in a logarithmic potential are derived, the limiting cases are considered, and the results of numerical integration of the equations of motion are presented along with sketches of a few representative orbits. (C.E.S.)

  5. Diplopia and orbital wall fractures.

    Science.gov (United States)

    Boffano, Paolo; Roccia, Fabio; Gallesio, Cesare; Karagozoglu, K Hakki; Forouzanfar, Tymour

    2014-01-01

    Diplopia is a symptom that is frequently associated with orbital wall fractures. The aim of this article was to present the incidence and patterns of diplopia after orbital wall blow-out fractures in 2 European centers, Turin and Amsterdam, and to identify any correlation between this symptom and such fractures. This study is based on 2 databases that have continuously recorded data of patients hospitalized with maxillofacial fractures between 2001 and 2010. On the whole, 447 patients (334 males, 113 females) with pure blow-out orbital wall fractures were included. The most frequently involved orbital site was the floor (359 fractures), followed by medial wall (41 fractures) and lateral wall (5 fractures). At presentation, 227 patients (50.7%) had evidence of diplopia. In particular, in most patients, a diplopia in all directions was referred (78 patients). Statistically significant associations were found between diplopia on eye elevation and orbital floor fractures (P diplopia and medial wall fractures (P diplopia on eye elevation and horizontal diplopia at presentation could be useful clinical indicators orbital floor and medial wall fractures, respectively.

  6. Microbiological profile of orbital abscess

    Directory of Open Access Journals (Sweden)

    N Suneetha

    2012-01-01

    Full Text Available Background: Knowledge of the culture and sensitivity pattern is necessary, for the institution of appropriate empirical antibiotic therapy in orbital abscess. Objective: The objective of this study is to describe culture and sensitivity patterns of specimens from the orbit and surrounding structures. Materials and Methods: Retrospectively the medical records of 56 cases of orbital abscess were reviewed. Results: Cultures were positive in 38/56 (68.8% orbital specimens and the organisms included Staphylococcus aureus 18, Streptococci 7, Pseudomonas aeruginosa 3, 2 each of Enterobactersp, Escherichia coli, Proteus mirabilis, Acinetobacter sp. and 1 each of Actinomyces israelii, Diptheroids, Coagulase negative Staphylococcus, Citrobacter freundii, Methicillin-resistant S. aureus and Enterococcus faecalis. Four had polymicrobial infection. Culture of purulent nasal discharge, swabs taken from foci of infection on the face, and blood cultures were done in 26/56, and positive cultures were obtained in 16/26 (61.5% specimens. In 12 patients, there was a concurrence in the organism cultured from the orbit and from cultures from other sites. Gram-negative organisms were associated with increased ocular morbidity. Conclusion: Gram-positive cocci, especially S. aureus are the most common organisms isolated from orbital abscesses. Infections by Gram-negative organisms were associated with more complications. Empirical intravenous antibiotic therapy should have a broad spectrum of activity effective against a wide range of Staphylococcal organisms and Gram-negative bacilli.

  7. Low Earth orbit communications satellite

    Science.gov (United States)

    Moroney, D.; Lashbrook, D.; Mckibben, B.; Gardener, N.; Rivers, T.; Nottingham, G.; Golden, B.; Barfield, B.; Bruening, J.; Wood, D.

    1992-01-01

    A current thrust in satellite communication systems considers a low-Earth orbiting constellations of satellites for continuous global coverage. Conceptual design studies have been done at the time of this design project by LORAL Aerospace Corporation under the program name GLOBALSTAR and by Motorola under their IRIDIUM program. This design project concentrates on the spacecraft design of the GLOBALSTAR low-Earth orbiting communication system. Overview information on the program was gained through the Federal Communications Commission licensing request. The GLOBALSTAR system consists of 48 operational satellites positioned in a Walker Delta pattern providing global coverage and redundancy. The operational orbit is 1389 km (750 nmi) altitude with eight planes of six satellites each. The orbital planes are spaced 45 deg., and the spacecraft are separated by 60 deg. within the plane. A Delta 2 launch vehicle is used to carry six spacecraft for orbit establishment. Once in orbit, the spacecraft will utilize code-division multiple access (spread spectrum modulation) for digital relay, voice, and radio determination satellite services (RDSS) yielding position determination with accuracy up to 200 meters.

  8. Orbital Volumetry in Graves' Orbitopathy

    DEFF Research Database (Denmark)

    Al-Bakri, Moug; Rasmussen, Åse Krogh; Thomsen, Carsten

    2014-01-01

    .6 cm(3) in controls, 8.7 ± 8.0 cm(3) in GO without DON, and 9.4 ± 3.1 cm(3) in GO with DON. The muscle and fat volumes were higher in patients with GO than in controls (P orbits with and without DON were not significantly different. The volume of the optic nerve were...... similar in the 3 groups. The number of apical, coronal 2 mm thick slices with no fat was 2.9 ± 0.9 in normal orbits, it was 4.1 ± 1.0 in GO orbits without DON and 5.3 ± 0.8 in GO orbits with DON (P = 0.007). Conclusion. Apical muscle enlargement may be more important than orbital fat enlargement......Purpose. We wanted to investigate the relative significance of fat and muscle enlargement in the development of dysthyroid optic neuropathy (DON) in Graves' orbitopathy (GO). Methods. Preoperative coronal CT scans of 13 patients with and without DON who subsequently underwent orbital decompression...

  9. Space Tourism: Orbital Debris Considerations

    Science.gov (United States)

    Mahmoudian, N.; Shajiee, S.; Moghani, T.; Bahrami, M.

    2002-01-01

    Space activities after a phase of research and development, political competition and national prestige have entered an era of real commercialization. Remote sensing, earth observation, and communication are among the areas in which this growing industry is facing competition and declining government money. A project like International Space Station, which draws from public money, has not only opened a window of real multinational cooperation, but also changed space travel from a mere fantasy into a real world activity. Besides research activities for sending man to moon and Mars and other outer planets, space travel has attracted a considerable attention in recent years in the form of space tourism. Four countries from space fairing nations are actively involved in the development of space tourism. Even, nations which are either in early stages of space technology development or just beginning their space activities, have high ambitions in this area. This is worth noting considering their limited resources. At present, trips to space are available, but limited and expensive. To move beyond this point to generally available trips to orbit and week long stays in LEO, in orbital hotels, some of the required basic transportations, living requirements, and technological developments required for long stay in orbit are already underway. For tourism to develop to a real everyday business, not only the price has to come down to meaningful levels, but also safety considerations should be fully developed to attract travelers' trust. A serious hazard to space activities in general and space tourism in particular is space debris in earth orbit. Orbiting debris are man-made objects left over by space operations, hazardous to space missions. Since the higher density of debris population occurs in low earth orbit, which is also the same orbit of interest to space tourism, a careful attention should be paid to the effect of debris on tourism activities. In this study, after a

  10. Orbital, subconjunctival, and subcutaneous emphysema after an orbital floor fracture

    Directory of Open Access Journals (Sweden)

    Ababneh OH

    2013-06-01

    Full Text Available Osama H Ababneh Department of Ophthalmology, The University of Jordan and Jordan University Hospital, Amman, Jordan Abstract: A 16-year-old boy presented to the emergency department with the complaint of a sudden, painful left eye and proptosis after an episode of sneezing. A few hours earlier, he had sustained a blunt trauma to the left orbit as the result of a fistfight. The initial examination showed subcutaneous and subconjunctival emphysema. Visual acuity in the left eye was 20/30 (0.67, the pupils were reactive with no relative afferent pupillary defect, and there were mild limitations in levoduction and supraduction. A slit-lamp examination showed normal anterior and posterior segments with an intraocular pressure of 26 mmHg. An orbital computed tomography scan showed orbital, subconjunctival, and subcutaneous emphysema associated with a small fracture of the orbital floor. Following conservative management with broad-spectrum oral antibiotics, a topical antiglaucoma drug, and lubricating eye drops, the patient improved dramatically within one week. Keywords: emphysema, orbital fracture, trauma

  11. La tipografía como marca

    OpenAIRE

    Rodríguez Valero, Daniel

    2015-01-01

    Según Interbrand una marca es una combinación de atributos, tangibles e intangibles, simbolizados por una marca registrada que, si se gestiona adecuadamente, genera valor e influencia. La tipografía y la letra en general, como vehículo natural de expresión de la parte verbal de la marca, posee una capacidad de marcación especial que muchas veces no aprovechamos como merece. El objetivo de este estudio es tratar las tipografías como si fueran marcas y no productos para conseguir incrementar su...

  12. Los ritmos como terapia para la impulsividad

    Directory of Open Access Journals (Sweden)

    Mónica Triviño

    2012-10-01

    Full Text Available Investigaciones recientes muestran que el uso de patrones rítmicos facilita la respuesta óptima en el tiempo, por lo que el entrenamiento mediante ritmos podría proponerse como terapia novedosa ante problemas como la impulsividad. Esto podría beneficiar a pacientes con daño prefrontal o personas con trastorno por déficit de atención e hiperactividad (TDAH, que suelen mostrar conductas impulsivas, así como dificultad para estimar el paso del tiempo.

  13. La universidad como organización

    Directory of Open Access Journals (Sweden)

    Luis Aurelio Ordoñez Burbano

    2001-07-01

    Full Text Available El presente artículo versa sobre la unviersidad como organización y tiene como objetivo hacer una reflexión sobre la misión de la universidad colombiana en el marco de diversos entornos. Como punto de partida, se propone una precisión sobre la misión de la universidad moderna y la investigación, a diferencia de la universidad colonial y decimonónica limitada a la divulgación de conocimientos preexistentes.

  14. Orbit graphs and face-transitivity of k-orbit polytopes

    OpenAIRE

    Cunningham, Gabe

    2012-01-01

    The orbit graph of a k-orbit polytope is a graph on k nodes that shows how the flag orbits are related by flag adjacency. Using orbit graphs, we classify k-orbit polytopes and determine when a k-orbit polytope is i-transitive. We then provide an explicit classification of three-orbit polytopes, and we describe a generating set for their automorphism groups.

  15. Tumor pathology of the orbit.

    Science.gov (United States)

    Héran, F; Bergès, O; Blustajn, J; Boucenna, M; Charbonneau, F; Koskas, P; Lafitte, F; Nau, E; Roux, P; Sadik, J C; Savatovsky, J; Williams, M

    2014-10-01

    The term orbital tumor covers a wide range of benign and malignant diseases affecting specific component of the orbit or developing in contact with them. They are found incidentally or may be investigated as part of the assessment of a systemic disorder or because of orbital signs (exophthalmos, pain, etc.). Computed tomography, MRI and Color Doppler Ultrasound (CDU), play a varying role depending on the clinical presentation and the disease being investigated. This article reflects long experience in a reference center but does not claim to be exhaustive. We have chosen to consider these tumors from the perspective of their usual presentation, emphasizing the most common causes and suggestive radiological and clinical presentations (progressive or sudden-onset exophthalmos, children or adults, lacrimal gland lesions, periorbital lesions and enophthalmos). We will describe in particular muscle involvement (thyrotoxicosis and tumors), vascular lesions (cavernous sinus hemangioma, orbital varix, cystic lymphangioma), childhood lesions and orbital hematomas. We offer straightforward useful protocols for simple investigation and differential diagnosis. Readers who wish to go further to extend their knowledge in this fascinating area can refer to the references in the bibliography.

  16. First Spacecraft Orbit of Mercury

    Science.gov (United States)

    Showstack, Randy

    2011-03-01

    After a 7.9-billion-kilometer flight since its launch on 3 August 2004—which included flybys of Earth, Venus, and Mercury—NASA's MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft entered a planned, highly elliptical orbit around the closest planet to our Sun on 17 March. Engineers in the mission operations center at the Johns Hopkins University Applied Physics Laboratory (JHU/APL) in Laurel, Md., which manages the mission for NASA, received radiometric signals indicating a successful orbit insertion at 9:10 P.M. local time. "Tonight we will have orbited the fifth planet in the solar system. This is a major accomplishment," Ed Weiler, NASA assistant administrator for the Science Mission Directorate, said at a 17 March public forum at JHU/APL, noting that spacecraft have previously entered orbit around several other planets. "You only go into orbit for the first time around Mercury once in human history, and that is what was accomplished tonight."

  17. Featured Image: Globular Cluster Orbits

    Science.gov (United States)

    Kohler, Susanna

    2017-04-01

    This figure (click for the full view) shows the meridional galactic orbits of 12 globular clusters that orbit the Milky Way. The recent release of stellar parallax data from Gaia allowed a team of scientists at Dartmouth College to improve measurements of a number of galactic globular clusters very old clusters of stars that can either orbit within the galactic disk and bulge or more distantly in the galactic halo. In a recent publication led by Erin OMalley, the team presents their findings and combines their new measurements for the clusters with proper motions from past studies to calculate the orbits that these globulars take. These calculations show us whether the clusters reside in the galactic disk and bulge (as only NGC 104 does in the sample shown here, since its orbit is confined to 8 kpc radially and 4 kpc vertically of the galactic center), or if they are halo clusters. To learn more about the authors work, you can check out the paper below!CitationErin M. OMalley et al 2017 ApJ 838 162. doi:10.3847/1538-4357/aa6574

  18. El Derecho como argumentación

    Directory of Open Access Journals (Sweden)

    Atienza, Manuel

    1999-11-01

    Full Text Available Not available

    Frente a las concepciones del Derecho como norma, como hecho o como valor (que caracterizan, respectivamente, al norrnativismo, al realismo jurídico y al iusnaturalismo, se propone aquí un cuarto enfoque que consiste en ver el Derecho como argumentación (y que cohra especial relevancia en las sociedades democráticas. Sin embargo, no hay una única forma de entender la argumentación jurídica. Aunque conectadas entre sí, en el trabajo se distinguen tres concepciones: la formal, la material y la pragmática o dialéctica; muchas cuestiones que se plantean en el ámbito de la teoría de la argumentación jurídica pueden resolverse -o aclararse- teniendo en cuenta esa triple perspectiva.

  19. El videojuego como material educativo: La Odisea

    Directory of Open Access Journals (Sweden)

    Belén Mainer Blanco

    2012-04-01

    Full Text Available La investigación se basa en la función educativa que pueden cumplir los videojuegos, un campo que consideramos inexplorado por tres motivos principalmente: su reciente incorporación, su impopularidad educativa (el rechazo el videojuego como herramienta de aprendizaje y considerado, por el contrario, como una distracción, y la incompleta incorporación de las nuevas tecnologías de información y comunicación (TIC en el ámbito familiar y educativo. En una segunda parte, se ha realizado una aplicación práctica tomando como referencia la gran obra universal “La Odisea”, cuya intención es mostrar la utilidad del videojuego como complemento educativo.

  20. Las bellas artes como terapia en Aristoteles

    National Research Council Canada - National Science Library

    Gonzalez A., Sergio

    2010-01-01

    .... Para empezar, se expone la vision de la salud como armonia en el pensamiento de Aristoteles, a continuacion se describen y comparan los conceptos de tekhne y phronesis, se demuestra la necesidad...

  1. "La noche boca arriba" como encrucijada literaria

    OpenAIRE

    Amícola, José

    1997-01-01

    El principio de deslizamiento de planos había aparecido ya como principio constructivo tangencial en un cuento de Borges como "Tlön, Uqbar, Orbis Tertius"; sería tarea de Cortázar catapultarlo a factor dominante. Objetivo de nuestro análisis es demostrar la función que este principio desempeña en el relato. (Párrafo extraído del texto a modo de resumen)

  2. COMO ENTENDER AS PRINCIPAIS TEORIAS DA LE

    OpenAIRE

    Nascimento, Francisco de Assis do; Carvalho, Jander Ramos; Costa, Priscila Márcia de Andrade; Bastos, Rafael Lira Gomes

    2013-01-01

    O presente artigo mostrará algumas das principais teorias de aquisiçãode LE. Desta forma mostraremos como fatores como afetividadee o meio, encontrados nessas teorias podem influenciar no processode aquisição de uma língua estrangeira. Observaremos também quecada teoria observa pontos diferentes do processo de aquisição de L2,uns tendem ao cognitivismo outras ao social, e outras aos aspectos lingüísticos.

  3. The Eccentric Behavior of Nearly Frozen Orbits

    Science.gov (United States)

    Sweetser, Theodore H.; Vincent, Mark A.

    2013-01-01

    Frozen orbits are orbits which have only short-period changes in their mean eccentricity and argument of periapse, so that they basically keep a fixed orientation within their plane of motion. Nearly frozen orbits are those whose eccentricity and argument of periapse have values close to those of a frozen orbit. We call them "nearly" frozen because their eccentricity vector (a vector whose polar coordinates are eccentricity and argument of periapse) will stay within a bounded distance from the frozen orbit eccentricity vector, circulating around it over time. For highly inclined orbits around the Earth, this distance is effectively constant over time. Furthermore, frozen orbit eccentricity values are low enough that these orbits are essentially eccentric (i.e., off center) circles, so that nearly frozen orbits around Earth are bounded above and below by frozen orbits.

  4. Las leyendas regionales como intangibles territoriales

    Directory of Open Access Journals (Sweden)

    Eloy Martos Núñez

    2015-01-01

    Full Text Available El artículo examina el concepto de leyenda como intangible territorial en diversas escalas, desde la local a la regional o nacional, y su relación con la construcción de mitos étnicos y la emergencia de tradiciones translocales. Para ello, se revisan la metodología de los estudios corográficos y las nociones de ecotipo y de paisaje cultural, así como la etnografía de los territorios simbólicos a la luz de conceptos como el clásico «témenos» y modernos como el «mytho-moteur» (Abadal, 1958. Se aplican estudios de casos que evidencian cómo es el Imaginario, en interacción con factores geohistóricos del lugar, el que a menudo acota y perimetrea un territorio a través de cauces como la fabulación legendaria y los ritos paralitúgicos, como procesiones o peregrinaciones. La conclusión es que las leyendas y los arquetipos de origen étnico y genealógico reescriben tradiciones que crean identidades y se pueden proyectar en ámbitos diferentes de la vida política o recreativa, con perfiles igualmente diferentes.

  5. El humor como herramienta para lograr aprendizajes

    Directory of Open Access Journals (Sweden)

    Hilda Torres de Sánchez

    2003-09-01

    Full Text Available Una tendencia mundial se ha originado: el uso del humor como herramienta para lograr aprendizajes y mejorar el ambiente donde la persona se encuentre. En el área educativa hay pruebas que demuestran su utilidad y que efectivamente origina cambios positivos, medidos en las evaluaciones, tanto en los estudiantes como en participantes de sesiones de facilitación. El objetivo del experimento realizado fue: Determinar el comportamiento a través de la calificaciones en la primera prueba, del efecto del uso del humor en el dictado de clases utilizando diferentes herramientas como: chistes, anécdotas, analogías en los contenidos. A través de un estudio experimental con un grupo de control realizado en dos aulas de clases con 35 alumnos cada uno, al grupo experimental se le aplicó diferentes recursos humorísticos como herramientas de aprendizaje. Se analizaron las calificaciones en la primera prueba a través de porcentajes de aprobados y aplazados, observándose que el grupo experimental arrojó los mayores porcentajes de aprobados. Tales resultados confirman que el humor como herramienta, si induce a un desempeño excelente en alumnos, lo que lleva a implementar acciones de adiestramiento para los facilitadores, así como el surgimiento de investigaciones más profundas sobre el uso del humor en la educación.

  6. MRI of orbital hydroxyapatite implants

    Energy Technology Data Exchange (ETDEWEB)

    Flanders, A.E. [Dept. of Radiology, Thomas Jefferson Univ. Hospital, Philadelphia, PA (United States); De Potter, P. [Dept. of Ophthalmology, Wills Eye Inst., Philadelphia, PA (United States); Rao, V.M. [Dept. of Radiology, Thomas Jefferson Univ. Hospital, Philadelphia, PA (United States); Tom, B.M. [Dept. of Radiology, Thomas Jefferson Univ. Hospital, Philadelphia, PA (United States); Shields, C.L. [Dept. of Ophthalmology, Wills Eye Inst., Philadelphia, PA (United States); Shields, J.A. [Dept. of Ophthalmology, Wills Eye Inst., Philadelphia, PA (United States)

    1996-04-01

    Our aim was to use MRI for the postsurgical assessment of a new form of integrated orbital implant composed of a porous calcium phosphate hydroxyapatite substrate. We studied ten patients 24-74 years of age who underwent enucleation and implantation of a hydroxyapatite ball; 5-13 months after surgery, each patient was examined by spin-echo MRI, with fat suppression and gadolinium enhancement. Fibrovascular ingrowth was demonstrated in all ten patients as areas of enhancement at the periphery of the hydroxyapatite sphere that extended to the center to a variable degree. The radiologist should aware of the MRI appearances of the coralline hydroxyapatite orbital implant since it is now widely used following enucleation. MRI is a useful means to determine successful incorporation of the substrate into the orbital tissues. The normal pattern of contrast enhancement should not be mistaken for recurrent tumor or infection. (orig.)

  7. Orbital Evolution of 4179 Toutatis

    CERN Document Server

    Siregar, Suryadi

    2013-01-01

    Asteroid 1934 CT;1989 AC, well known as 4179 Toutatis, is an Apollo and Mars-crosser asteroid with a chaotic orbit produced by a 3:1 resonance with Jupiter and a 1:4 resonance with the Earth, and frequent close approaches to the Earth. It is listed as a potential hazardous object (PHA). The aim of this study is to investigate the possibility of 4179 Toutatis to be ejected from the Solar System. This paper presents an orbital evolution of 4179 Toutatis in time interval of ~300 kyr. Investigation of its orbital evolution is conducted by using the Mercury subroutine package, where the gravitational perturbations of eight major planets in the Solar System are considered. Over very short time scales (~300 kyr) relative to the Solar System life time (~10 Gyr), the asteroid 4179 Toutatis gave an example of chaotic motion that can cause asteroid to move outward and may be followed by escaping from the Solar System.

  8. Oncocytic Adenocarcinoma of the Orbit.

    Science.gov (United States)

    Harris, Gerald J; Paul, Sean; Hunt, Bryan C

    Oncocytic adenocarcinoma of the orbit is a rare tumor, with 1 case of nonlacrimal sac, nonlacrimal gland origin, and a poor outcome previously reported. An 85-year-old man with a 2-month history of left-sided epiphora, enlarging eyelid nodules, and diplopia in left gaze was found on imaging to have a poorly circumscribed, nodular mass of uniform radiodensity in the inferomedial orbit. Incisional biopsy revealed morphologic and immunohistochemical features of oncocytic adenocarcinoma with origin in the caruncle suspected, and CT of the neck, chest, abdomen, and pelvis showed no metastases or remote primary tumor source. Based on multidisciplinary consensus, orbital exenteration with adjuvant radiation therapy was performed, and there was no evidence of residual or recurrent tumor 2 years after treatment.

  9. Multiple Myeloma of the Orbit

    Directory of Open Access Journals (Sweden)

    Mona Hassan

    2012-01-01

    Full Text Available The authors report a case of a 62-year-old female with history of multiple myeloma who presents with complains of swelling and pain in her right eye. On examination, it was found that she has proptosis, chemosis, and diplopia along with decreased vision. Initial workup and treatment did not yield significant results, eventually she was found to have myelomatous changes in her right orbit on MRI and was diagnosed with multiple myeloma of the orbit which resolved solely with radiation. This case tends to highlight the importance of considering myeloma of the orbit as a very important and early differential diagnosis in a patient with a history of multiple myeloma presenting with a swollen and painful eye.

  10. GridOrbit public display

    DEFF Research Database (Denmark)

    Ramos, Juan David Hincapie; Tabard, Aurélien; Bardram, Jakob

    2010-01-01

    We introduce GridOrbit, a public awareness display that visualizes the activity of a community grid used in a biology laboratory. This community grid executes bioin-formatics algorithms and relies on users to donate CPU cycles to the grid. The goal of GridOrbit is to create a shared awareness about...... the research taking place in the biology laboratory. This should promote contribu-tions to the grid, and thereby mediate the appropriation of the grid technology. GridOrbit visualizes the activity in the grid, shows information about the different active projects, and supports a messaging functionality where...... people comment on projects. Our work explores the usage of interactive technologies as enablers for the appropriation of an otherwise invisible infrastructure....

  11. Orbital computed tomography for exophthalmos

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Ok Keun; Lee, Hyun; Sol, Chang Hyo; Kim, Byung Soo [College of Medicine, Pusan National University, Busan (Korea, Republic of)

    1987-06-15

    Since exophthalmos is caused by any decrease in the size of bony orbit or occurrence of mass within the rigid orbit, the accurate diagnosis of its causes are essential in determining the therapeutic aims. Exophthalmos is one of the important signs being the indication for orbital computed tomography along with periorbital swelling, visual loss, orbital trauma and diplopia. CT as the diagnostic tool for the cause of exophthalmos not only displays a superb role with uncomparable quality in comparison to any conventional diagnostic methods but also has a decisive role in determining the therapeutic aims and the appropriate operative method when the operation is indicated. The orbital CT was performed from May in 1983 to May in 1985 whose with chief complaints were exophthalmos and 23 cases were confirmed by operation, biopsy, clinical progression or other diagnostic procedures. Here was report thoroughly analyzed 23 cases. The results were as follows : 1. The etiologic disease of exophthalmos were 6 cases of pseudotumor, 4 cases of thyroid ophthalmopathy, 4 cases of maxill ary sinus and nasal cavity Ca., 3 cases of mucocele and 1 case of alveolar soft part sarcoma, osteoma, dermoid cyst, pleomorphic adenoma, meningioma, and C.C.F. each. 2. The origin of the etiologic diseases of exophthalmos were 13 cases of primary within bony orbit and 10 cases of secondary from adjacent structure. 3. The site of lesions were 11 cases of intraconal and extraconal, 10 cases of extraconal, and 2 cases of intraconal origin. 4. The degree of exophthalmos in CT scan was in proportion to the volume of the mass except in the case of thyroid ophthalmopathy. The upper limit of normal range by CT scan using regression line equation was 16.2 mm in approximation. 5. CT was a very useful diagnostic tool in the accurate assessment of the kinds of lesion, its location, and its relationship to adjacent structures in the diagnosis of etiologic diseases of exophthalmos.

  12. Energy and the Elliptical Orbit

    Science.gov (United States)

    Nettles, Bill

    2009-03-01

    In the January 2007 issue of The Physics Teacher, Prentis, Fulton, Hesse, and Mazzino describe a laboratory exercise in which students use a geometrical analysis inspired by Newton to show that an elliptical orbit and an inverse-square law force go hand in hand. The historical, geometrical, and teamwork aspects of the exercise are useful and important. This paper presents an exercise which uses an energy/angular momentum conservation model for elliptical orbits. This exercise can be done easily by an individual student and on regular notebook-sized paper.

  13. AA, closed orbit observation pickup

    CERN Multimedia

    CERN PhotoLab

    1980-01-01

    Electrostatic pickups around the circumference of the AA served for the measurement of the closed orbits across the wide momentum range of +- 3% to either side of central orbit. The pickups were of the "shoebox" type, with diagonal cuts, a horizontal and a vertical one mechanically coupled together. They were located where they would not require extra space. The wide ones (very wide indeed: 70 cm), like the one we see here, were placed inside the vacuum chamber of the wide quadrupoles QFW, at maximum dispersion. See also 8001372, 8001383, 8010045

  14. AA, closed orbit observation pickup

    CERN Multimedia

    CERN PhotoLab

    1980-01-01

    Electrostatic pickups around the circumference of the AA served for the measurement of the closed orbits across the wide momentum range of +- 3% to either side of central orbit. The pickups were of the "shoebox" type, with diagonal cuts, a horizontal and a vertical one mechanically coupled together. They were located where they would not require extra space. The wide ones (very wide indeed: 70 cm), like the one we see here, were placed inside the vacuum chamber of the wide quadrupoles, QFW, at maximum dispersion. See also 8001372,8001383, 8010042

  15. Orbital resonances around black holes.

    Science.gov (United States)

    Brink, Jeandrew; Geyer, Marisa; Hinderer, Tanja

    2015-02-27

    We compute the length and time scales associated with resonant orbits around Kerr black holes for all orbital and spin parameters. Resonance-induced effects are potentially observable when the Event Horizon Telescope resolves the inner structure of Sgr A*, when space-based gravitational wave detectors record phase shifts in the waveform during the resonant passage of a compact object spiraling into the black hole, or in the frequencies of quasiperiodic oscillations for accreting black holes. The onset of geodesic chaos for non-Kerr spacetimes should occur at the resonance locations quantified here.

  16. AA, closed orbit observation pickup

    CERN Multimedia

    1980-01-01

    Electrostatic pickups around the circumference of the AA served for the measurement of the closed orbits across the wide momentum range of +- 3% to either side of central orbit. The pickups were of the "shoebox" type, with diagonal cuts, a horizontal and a vertical one mechanically coupled together. They were located where they would not require extra space. The small ones, like the one we see here, were inserted into the vacuum chamber of the BLG (long and narrow) bending magnets. See also 8001372, 8010042, 8010045

  17. AA, closed orbit observation pickup

    CERN Multimedia

    CERN PhotoLab

    1980-01-01

    Electrostatic pickups around the circumference of the AA served for the measurement of the closed orbits across the wide momentum range of +- 3% to either side of central orbit. The pickups were of the "shoebox" type, with diagonal cuts, a horizontal and a vertical one mechanically coupled together. They were located where they would not require extra space. The small ones, like the one we see here, were inserted into the vacuum chamber of the BLG (long and narrow) bending magnets. Werner Sax contemplates his achievement. See also 8001383, 8010042, 8010045.

  18. Primary orbital squamous cell carcinoma

    Directory of Open Access Journals (Sweden)

    Ana L. Campos Arbulú

    2017-02-01

    Full Text Available Primary orbital squamous cell carcinoma is a rare entity. There is little published literature. We report a case of primary squamous cell carcinoma of the orbital soft tissues. Surgical resection offered the best treatment for the patient. Complete resection of the lesion was achieved. The patient received adjuvant radiotherapy due to the proximity of the lesion to the surgical margins. Surgical treatment is feasible and should be considered as part of the surgeon's arsenal. However, therapeutic decisions must be made on a case-by-case basis

  19. Nodular Fasciitis of the Orbit.

    Science.gov (United States)

    Compton, Christopher J; Clark, Jeremy D; Thompson, Matthew P; Lee, Hui Bae H; Nunery, William R

    A 13-month-old boy was presented with new onset proptosis of the right eye. CT scan and MRI showed an enhancing mass in the right superior orbit with local bone remodeling and erosion. A craniotomy was performed for biopsy and sub-total resection. Histopathology and immunohistochemistry confirmed the lesion to be nodular fasciitis. Nodular fasciitis lesions are classically found in the anterior ocular adnexa, especially in pediatric patients. This is the first reported case of nodular fasciitis arising in the posterior orbit of a child younger than 16.

  20. Desarrollo de un método de captación de movimiento humano para el control remoto de terapias de rehabilitación robóticas

    OpenAIRE

    Vivas Mateos, Guillermo

    2016-01-01

    Ciertas patologías de origen neurológico como los infartos cerebrales o la parálisis cerebral pueden provocar deficiencias en las capacidades motrices de los afectados. Las plataformas robóticas de rehabilitación, son robots especialmente diseñados para asistir en terapias de rehabilitación, ayudando a mejorar la recuperación del paciente. Además, estas terapias robóticas aportan una mejora en su motivación, ya que el uso de robots suele resultar atractivo a la población, en especial a los ni...

  1. Precision Orbit Determination for the Lunar Reconnaissance Orbiter: orbit quality and gravity field estimation

    Science.gov (United States)

    Mazarico, E.; Rowlands, D. D.; Neumann, G. A.; Lemoine, F. G.; Torrence, M. H.; Smith, D. E.; Zuber, M. T.; Mao, D.

    2010-12-01

    We present results of the Precision Orbit Determination work undertaken by the Lunar Orbiter Laser Altimeter (LOLA) Science Team for the Lunar Reconnaissance Orbiter (LRO) mission, in order to meet the position knowledge accuracy requirements (50-m total position) and to precisely geolocate the LRO datasets. In addition to the radiometric tracking data, one-way laser ranges (LR) between Earth stations and the spacecraft are made possible by a small telescope mounted on the spacecraft high-gain antenna. The photons received from Earth are transmitted to one LOLA detector by a fiber optics bundle. The LOLA timing system enables 5-s LR normal points with precision better than 10cm. Other types of geodetic constraints are derived from the altimetric data itself. The orbit geometry can be constrained at the times of laser groundtrack intersections (crossovers). Due to the Moon's slow rotation, orbit solutions and normal equations including altimeter crossovers are processed and created in one month batches. Recent high-resolution topographic maps near the lunar poles are used to produce a new kind of geodetic constraints. Purely geometric, those do not necessitate actual groundtrack intersections. We assess the contributions of those data types, and the quality of our orbits. Solutions which use altimetric crossover meet the horizontal 50-m requirement, and perform usually better (10-20m). We also obtain gravity field solutions based on LRO and historical data. The various LRO data are accumulated into normal equations, separately for each one month batch and for each measurement type, which enables the final weights to be adjusted during the least-squares inversion step. Expansion coefficients to degree and order 150 are estimated, and a Kaula rule is still needed to stabilize the farside field. The gravity field solutions are compared to previous solutions (GLGM-3, LP150Q, SGM100h) and the geopotential predicted from the latest LOLA spherical harmonic expansion.

  2. Optimal Reorientation Of Spacecraft Orbit

    Directory of Open Access Journals (Sweden)

    Chelnokov Yuriy Nikolaevich

    2014-06-01

    Full Text Available The problem of optimal reorientation of the spacecraft orbit is considered. For solving the problem we used quaternion equations of motion written in rotating coordinate system. The use of quaternion variables makes this consideration more efficient. The problem of optimal control is solved on the basis of the maximum principle. An example of numerical solution of the problem is given.

  3. DOT strategies versus orbiter strategies

    NARCIS (Netherlands)

    Rutten, R.J.

    2001-01-01

    The Dutch Open Telescope is a high-resolution solar imager coming on-line at La Palma. The definition of the DOT science niche, strategies, and requirements resemble Solar Orbiter considerations and deliberations. I discuss the latter in the light of the former, and claim that multi-line observation

  4. Three planets orbiting Wolf 1061

    CERN Document Server

    Wright, D J; Tinney, C G; Bentley, J S; Zhao, Jinglin

    2015-01-01

    We use archival HARPS spectra to detect three planets orbiting the M3 dwarf Wolf1061 (GJ 628). We detect a 1.36 Mearth minimum-mass planet with an orbital period P = 4.888d (Wolf1061b), a 4.25 Mearth minimum-mass planet with orbital period P = 17.867d (Wolf1061c), and a likely 5.21 Mearth minimum-mass planet with orbital period P = 67.274d (Wolf1061d). All of the planets are of sufficiently low mass that they may be rocky in nature. The 17.867d planet falls within the habitable zone for Wolf 1061 and the 67.274d planet falls just outside the outer boundary of the habitable zone. There are no signs of activity observed in the bisector spans, cross-correlation full-width-half-maxima, Calcium H & K indices, NaD indices, or H-alpha indices near the planetary periods. We use custom methods to generate a cross-correlation template tailored to the star. The resulting velocities do not suffer the strong annual variation observed in the HARPS DRS velocities. This differential technique should deliver better exploi...

  5. Orbital abscess: Management and outcome

    Directory of Open Access Journals (Sweden)

    N Suneetha

    2000-01-01

    Full Text Available Purpose: To discuss the diagnosis, management and outcome of various types of orbital abscess. Methods: The medical records of 13 patients diagnosed and treated for orbital abscess were reviewed. The sources of infection included: paranasal sinusitis (n = 5, odontogenic origin of infection (n = 4, one each, temporal fossa abscess, palatal abscess, furuncle on the nose, and secondary to retrobulbar injection of steroid. Computed tomographic scans revealed the presence of an abscess in all 13 cases. Associated findings on CT scan included: sinus disease (n = 8, cavernous sinus thrombosis (n = 2 and subdural empyema (n = 2. All patients were treated with intensive, multiple, intravenous antibiotics and early surgical drainage. Results: Purulent material collected surgically from the orbit cultured Staphylococcus aureus (n = 3, two each Pseudomonas aeruginosa, Proteus mirabilis, Acinetobacter species and one each β-haemolytic Streptococci, Citrobacter frundi and Enterobacter. Final visual acuity was good in 6 patients (6/12 - 6/6 and no light perception in 6 others. Visual acuity could not be recorded in the infant. The other complications were intracranial abscess (n = 4, cavernous sinus thrombosis (n = 2 and restricted ocular motility (n = 1. Conclusions: A high index of suspicion is necessary, along with early institution of appropriate diagnostic imaging, and aggressive medical and surgical treatment for a favourable outcome in cases of orbital abscess.

  6. Myeloid Sarcoma in the Orbit.

    Science.gov (United States)

    Qian, Xiaoxiao; Gigantelli, James W; Abromowitch, Minnie; Morgan, Linda A; Suh, Donny W

    2016-12-08

    The authors describe a case of myeloid sarcoma of the orbit in a pediatric patient. An 8-month-old male infant presented to the ophthalmology clinic with a left orbital mass, which had been increasing in size over the previous 2 months. The mass was initially diagnosed at another clinic as an infantile hemangioma, and had been treated with a topical formulation of timolol. In the ophthalmology clinic, orbital magnetic resonance imaging showed a solid enhancing mass. A biopsy was performed, and histopathology revealed myeloid sarcoma. The disease responded well to a standard chemotherapy regimen. Myeloid sarcoma is a rare, extra-medullary presentation that can occur as an isolated tumor, concurrently with or at relapse of acute myeloid leukemia. Because few cases of myeloid sarcoma in the orbit have been reported, this case report aids in the management of myeloid sarcoma in pediatric patients. The report describes an 8-month-old male infant, the youngest patient to develop myeloid sarcoma without preexisting acute myeloid leukemia. [J Pediatr Ophthalmol Strabismus. 2016;53:e64-e68.].

  7. Getting a Crew into Orbit

    Science.gov (United States)

    Riddle, Bob

    2011-01-01

    Despite the temporary setback in our country's crewed space exploration program, there will continue to be missions requiring crews to orbit Earth and beyond. Under the NASA Authorization Act of 2010, NASA should have its own heavy launch rocket and crew vehicle developed by 2016. Private companies will continue to explore space, as well. At the…

  8. Energy and the Elliptical Orbit

    Science.gov (United States)

    Nettles, Bill

    2009-01-01

    In the January 2007 issue of "The Physics Teacher," Prentis, Fulton, Hesse, and Mazzino describe a laboratory exercise in which students use a geometrical analysis inspired by Newton to show that an elliptical orbit and an inverse-square law force go hand in hand. The historical, geometrical, and teamwork aspects of the exercise are useful and…

  9. Removing Orbital Debris with Lasers

    CERN Document Server

    Phipps, Claude R; Bradford, Brian; George, E Victor; Libby, Stephen B; Liedahl, Duane A; Marcovici, Bogdan; Olivier, Scot S; Pleasance, Lyn D; Reilly, James P; Rubenchik, Alexander; Strafford, David N; Valley, Michael T

    2011-01-01

    Orbital debris in low Earth orbit (LEO) are now sufficiently dense that the use of LEO space is threatened by runaway collisional cascading. A problem predicted more than thirty years ago, the threat from debris larger than about 1 cm demands serious attention. A promising proposed solution uses a high power pulsed laser system on the Earth to make plasma jets on the objects, slowing them slightly, and causing them to re-enter and burn up in the atmosphere. In this paper, we reassess this approach in light of recent advances in low-cost, light-weight modular design for large mirrors, calculations of laser-induced orbit changes and in design of repetitive, multi-kilojoule lasers, that build on inertial fusion research. These advances now suggest that laser orbital debris removal (LODR) is the most cost-effective way to mitigate the debris problem. No other solutions have been proposed that address the whole problem of large and small debris. A LODR system will have multiple uses beyond debris removal. Internat...

  10. THREE PLANETS ORBITING WOLF 1061

    Energy Technology Data Exchange (ETDEWEB)

    Wright, D. J.; Wittenmyer, R. A.; Tinney, C. G.; Bentley, J. S.; Zhao, Jinglin, E-mail: duncan.wright@unsw.edu.au [Department of Astronomy and Australian Centre for Astrobiology, School of Physics, University of New South Wales, NSW 2052 (Australia)

    2016-02-01

    We use archival HARPS spectra to detect three planets orbiting the M3 dwarf Wolf 1061 (GJ 628). We detect a 1.36 M{sub ⊕} minimum-mass planet with an orbital period P = 4.888 days (Wolf 1061b), a 4.25 M{sub ⊕} minimum-mass planet with orbital period P = 17.867 days (Wolf 1061c), and a likely 5.21 M{sub ⊕} minimum-mass planet with orbital period P = 67.274 days (Wolf 1061d). All of the planets are of sufficiently low mass that they may be rocky in nature. The 17.867 day planet falls within the habitable zone for Wolf 1061 and the 67.274 day planet falls just outside the outer boundary of the habitable zone. There are no signs of activity observed in the bisector spans, cross-correlation FWHMs, calcium H and K indices, NaD indices, or Hα indices near the planetary periods. We use custom methods to generate a cross-correlation template tailored to the star. The resulting velocities do not suffer the strong annual variation observed in the HARPS DRS velocities. This differential technique should deliver better exploitation of the archival HARPS data for the detection of planets at extremely low amplitudes.

  11. NATO: In-orbit experience

    Science.gov (United States)

    Capulli, J. J.

    1980-01-01

    The performance of the NATO-111-A and NATO 111-B satellite battery is reported. The electrical power subsystem is briefly described. The electrical characteristics and the reconditioning experience of the batteries is cited. The in-orbit experience is compared with results of preflight accelerated life tests.

  12. Shadowing Lemma and Chaotic Orbit Determination

    CERN Document Server

    Spoto, Federica

    2015-01-01

    Orbit determination is possible for a chaotic orbit of a dynamical system, given a finite set of observations, provided the initial conditions are at the central time. In a simple discrete model, the standard map, we tackle the problem of chaotic orbit determination when observations extend beyond the predictability horizon. If the orbit is hyperbolic, a shadowing orbit is computed by the least squares orbit determination. We test both the convergence of the orbit determination iterative procedure and the behaviour of the uncertainties as a function of the maximum number $n$ of map iterations observed. When the initial conditions belong to a chaotic orbit, the orbit determination is made impossible by numerical instability beyond a computability horizon, which can be approximately predicted by a simple formula. Moreover, the uncertainty of the results is sharply increased if a dynamical parameter is added to the initial conditions as parameter to be estimated. The uncertainty of the dynamical parameter decrea...

  13. The globe and orbit in Laron syndrome.

    Science.gov (United States)

    Kornreich, L; Konen, O; Lilos, P; Laron, Z

    2011-09-01

    Patients with LS have an inborn growth hormone resistance, resulting in failure to generate IGF-1. The purpose of this study was to evaluate the size of the eye and orbit in LS. We retrospectively reviewed the MR imaging of the brain in 9 patients with LS for the following parameters: axial diameter of the globe, interzygomatic distance, perpendicular distance from the interzygomatic line to margins of the globe, medial-to-lateral diameter of the orbit at the anterior orbital rim, distance from the anterior orbital rim to the anterior globe, maximal distance between the medial walls of the orbits, lateral orbital wall angle, lateral orbital wall length, and mediolateral thickness of the intraorbital fat in the most cranial image of the orbit. All measurements were made bilaterally. Twenty patients referred for MR imaging for unrelated reasons served as control subjects. Compared with the control group, the patients with LS had a significantly smaller maximal globe diameter and shallower but wider orbits due to a shorter lateral wall, a smaller medial distance between the orbits, and a larger angle of the orbit. The ratio between the most anterior orbital diameter and the globe was greater than that in controls. The position of the globe was more anterior in relation to the interzygomatic line. Shallow and wide orbits and small globes relative to orbital size are seen in LS and may be secondary to IGF-1 deficiency.

  14. [Orbital mycetoma: a case report].

    Science.gov (United States)

    Gueye, N N; Seck, S M; Diop, Y; Ndiaye Sow, M N; Agboton, G; Diakhaté, M; Dieng, M; Dieng, M T

    2013-05-01

    Mycetomas are pathological processes through which exogenous fungal or actinomycotic etiological agents produce grains. These etiological agents live in the soil and plants of endemic areas. They are introduced traumatically, primarily into the foot. The orbital location is rare. We report the case of a 17-year-old student admitted for progressive left proptosis over 2 years, following penetrating trauma by a fork in a rural setting. Examination revealed a heterogenous orbital mass with multiple fistulae, producing pus and black grains, and suggested, due to the color of the grains, a diagnosis of fungal mycetoma. MRI revealed a destructive process at the level of the lamina papracea of the ethmoid and the orbital floor. Anatomopathological examination confirmed the fungal nature of the infection, while culture in Sabouraud's medium was inconclusive. The outcome was favorable after exenteration and debridementof the ipsilateral maxillary sinus and nasal cavities, along with 4 months of ketoconazole. No recurrence has been observed for 14 months after surgery. Mycetomas are endemic to northwest Africa. Most frequently located in the foot, they are seldom seen in the orbit. The color of the grains provides a clue as to the etiology. Black-grain mycetomas are always fungal and are treated surgically--essentially like cancer--as the persistence of a single grain will cause a recurrence. The orbital location of a mycetoma is rare. In the present case report, the concept of port of entry, the clinical appearance, and the color of the grains guided the diagnosis. The histological examination of the surgical specimen confirmed the diagnosis. Copyright © 2012 Elsevier Masson SAS. All rights reserved.

  15. Space Shuttle Orbiter-Illustration

    Science.gov (United States)

    2001-01-01

    This illustration is an orbiter cutaway view with callouts. The orbiter is both the brains and heart of the Space Transportation System (STS). About the same size and weight as a DC-9 aircraft, the orbiter contains the pressurized crew compartment (which can normally carry up to seven crew members), the huge cargo bay, and the three main engines mounted on its aft end. There are three levels to the crew cabin. Uppermost is the flight deck where the commander and the pilot control the mission. The middeck is where the gallery, toilet, sleep stations, and storage and experiment lockers are found for the basic needs of weightless daily living. Also located in the middeck is the airlock hatch into the cargo bay and space beyond. It is through this hatch and airlock that astronauts go to don their spacesuits and marned maneuvering units in preparation for extravehicular activities, more popularly known as spacewalks. The Space Shuttle's cargo bay is adaptable to hundreds of tasks. Large enough to accommodate a tour bus (60 x 15 feet or 18.3 x 4.6 meters), the cargo bay carries satellites, spacecraft, and spacelab scientific laboratories to and from Earth orbit. It is also a work station for astronauts to repair satellites, a foundation from which to erect space structures, and a hold for retrieved satellites to be returned to Earth. Thermal tile insulation and blankets (also known as the thermal protection system or TPS) cover the underbelly, bottom of the wings, and other heat-bearing surfaces of the orbiter to protect it during its fiery reentry into the Earth's atmosphere. The Shuttle's 24,000 individual tiles are made primarily of pure-sand silicate fibers, mixed with a ceramic binder. The solid rocket boosters (SRB's) are designed as an in-house Marshall Space Flight Center project, with United Space Boosters as the assembly and refurbishment contractor. The solid rocket motor (SRM) is provided by the Morton Thiokol Corporation.

  16. La realidad como materia novelable: Alejo Carpentier

    OpenAIRE

    Raquel Arias Careaga

    2007-01-01

    Desde que en 1897 Benito Pérez Galdós defendiera como materia prima legítima de la literatura «la vida misma, de donde el artista saca las ficciones que nos instruyen y embelesan» (Pérez Galdós, 1990: 159), el realismo como instrumento de indagación y análisis de la sociedad no ha dejado de crecer y expandirse. Realismo crítico, como este de Galdós, que implica una ampliación del concepto chato de «realidad», incluyendo en ella «recuerdos, sueños, imaginación, locura, símbolos» para contribui...

  17. 'Orbital volume restoration rate after orbital fracture'; a CT-based orbital volume measurement for evaluation of orbital wall reconstructive effect.

    Science.gov (United States)

    Wi, J M; Sung, K H; Chi, M

    2017-01-13

    PurposeTo evaluate the effect of orbital reconstruction and factors related to the effect of orbital reconstruction by assessing of orbital volume using orbital computed tomography (CT) in cases of orbital wall fracture.MethodsIn this retrospective study, 68 patients with isolated blowout fractures were evaluated. The volumes of orbits and herniated orbital tissues were determined by CT scans using a three-dimensional reconstruction technique (the Eclipse Treatment Planning System). Orbital CT was performed preoperatively, immediately after surgery, and at final follow ups (minimum of 6 months). We evaluated the reconstructive effect of surgery making a new formula, 'orbital volume reconstruction rate' from orbital volume differences between fractured and contralateral orbits before surgery, immediately after surgery, and at final follow up.ResultsMean volume of fractured orbits before surgery was 23.01±2.60 cm(3) and that of contralateral orbits was 21.31±2.50 cm(3) (P=0.005). Mean volume of the fractured orbits immediately after surgery was 21.29±2.42 cm(3), and that of the contralateral orbits was 21.33±2.52 cm(3) (P=0.921). Mean volume of fractured orbits at final follow up was 21.50±2.44 cm(3), and that of contralateral orbits was 21.32±2.50 cm(3) (P=0.668). The mean orbital volume reconstruction rate was 100.47% immediately after surgery and 99.17% at final follow up. No significant difference in orbital volume reconstruction rate was observed with respect to fracture site or orbital implant type. Patients that underwent operation within 14 days of trauma had a better reconstruction rate at final follow up than patients who underwent operation over 14 days after trauma (P=0.039).ConclusionComputer-based measurements of orbital fracture volume can be used to evaluate the reconstructive effect of orbital implants and provide useful quantitative information. Significant reduction of orbital volume is observed immediately after orbital wall

  18. La realidad como materia novelable: Alejo Carpentier

    Directory of Open Access Journals (Sweden)

    Raquel Arias Careaga

    2007-12-01

    Full Text Available Desde que en 1897 Benito Pérez Galdós defendiera como materia prima legítima de la literatura «la vida misma, de donde el artista saca las ficciones que nos instruyen y embelesan» (Pérez Galdós, 1990: 159, el realismo como instrumento de indagación y análisis de la sociedad no ha dejado de crecer y expandirse. Realismo crítico, como este de Galdós, que implica una ampliación del concepto chato de «realidad», incluyendo en ella «recuerdos, sueños, imaginación, locura, símbolos» para contribuir a la formación de un «realismo total» (Rodríguez Puértolas, 2000, II: 93, al que se une también la asimilación de enseñanzas esenciales como la que representa la narrativa de Cervantes: La novelística de Galdós hunde sus raíces en el mejor Cervantes, como puede verse en su peculiar sentido del humor y de la ironía, en la concepción perspectivista de la realidad y en tantas otras cosas, algunas de ellas en verdad fundamentales. Así el concepto de la Naturaleza y sus relaciones dialécticas con el ser humano; así el Amor como elemento vital y animador del orden cósmico, muy alejado del idealismo vulgar romántico (Ibid., 93.

  19. Computed tomographic patterns of orbital cellulitis due to sinusitis Padrões tomográficos de celulite orbitária secundária à sinusite

    Directory of Open Access Journals (Sweden)

    Filipe José Pereira

    2006-08-01

    ,23%. Abscesso orbitário comprovado cirurgicamente foi detectado em 6 pacientes (13,33%. CONCLUSÕES: Em todos os casos de celulite orbitária secundária à sinusite foram detectadas mudanças intra-orbitárias na tomografia computadorizada: infiltração difusa da gordura orbitária, descolamento da periórbita (abscesso subperiósteo ou abscesso orbitário verdadeiro. A categoria I da classificação de celulite orbitária de Chandler (edema inflamatório deve ser entendida como estágio de um processo que já está ocorrendo dentro da órbita. Nesse sentido, a expressão "celulite pré-septal" que designa infecção palpebral não deve ser usada para nomear a categoria I da classificação de Chandler.

  20. La desigualdad como texto: relatos docentes

    OpenAIRE

    Scabuzzo, Tomás

    2013-01-01

    Nuestra hipótesis de trabajo se orienta a la interpretación de la especificidad de la relación, en el marco de la desigualdad educativa, entre la escuela como texto y los sujetos pedagógicos (estudiantes y docentes) en términos de encuentro - desencuentro, diferencia, malestar, multivocidad, discontinuidad, tensión, equivocidad, malentendido, etc. Planteamos como metodología de trabajo un abordaje de tipo cualitativo. Nuestro universo de estudio para la realización de esta investigación de ca...

  1. La norma penal como norma de conducta

    OpenAIRE

    Regis Prado, Luiz

    2011-01-01

    El artículo trata de la dicotomía entre norma de determinación y norma de valoración, para concluir que la norma penal es una norma jurídica de conducta, que prescribe un modo determinado de actuar. De esta forma, señala su estructura lógica y principales características, así como sus efectos en el campo de la antijuridicidad. SUMARIO: 1. Consideraciones generales; 2. Norma penal como norma de conducta. Norma de determinación o norma de valoración: distinción conceptual; 3. Nor...

  2. O teatro como um estado de encontro

    OpenAIRE

    Fagundes, Silvia Patricia

    2009-01-01

    A partir da teoria da “estética relacional” proposta por Nicolas Bourriaud, o artigo desenvolve uma concepção do teatro como um estado de encontro, um fenômeno que só acontece em um espaço-tempo compartilhado entre atores e espectadores , condicionado por um mecanismo de autopoiesis: teatro como um processo que gera eventos e não obras acabadas, que só acontecem em relação. Esta dimensão pode ser identificada com muita intensidade nos processos criativos da cena, que implicam uma dinâmica col...

  3. El conflicto como constructor de ciudad

    OpenAIRE

    2012-01-01

    El planteamiento central de este articulo, es el de sugerir una análisis en torno a algunas de las condiciones o mecanismo necesarios para que el conflicto opere como un potenciador de la diferencia y creador de alternativas para la convivencia Se realiza una distinción del concepto, un análisis de contenidos interaccionales en dinámicas de conflicto y su relación con el contexto urbano de Bogotá, enfocándose en ámbitos escolares. En ciudades como Bogotá, las discusiones y acciones que di...

  4. La entrevista como encuentro de subjetividades

    OpenAIRE

    Ruiz Martín del Campo, Emma; Facultad de Ciencias Sociales, Universidad Nacional Mayor de San Marcos. Lima - Perú.

    2014-01-01

    Entrevistar es generar un proceso de interacción en el que se implican al menos dos sujetos humanos. Como instrumento metodológico al servicio de las ciencias sociales, la entrevista puede variar tanto en su modalidad como en sus pretensiones. En el presente trabajo la reflexión se centra en las diferencias entre la entrevista psicoanalítica a profundidad y la entrevista etnológica y antropológica. La entrevista a profundidad de orientación psicoanalítica se usa para explorar la subjetividad...

  5. Como cumplir los mandatos de acceso abierto

    OpenAIRE

    Hernández San Miguel, Francisco Javier

    2013-01-01

    [ES] Mapa conceptual de como cumplir los mandatos de acceso abierto. Horizonte 2020 (UE) y la Ley de la ciencia [CAT] Mapa conceptual de com complir els mandats d'accés obert. Horitzó 2020 (UE) i la Llei de la ciència [EN] Conceptual map to fulfill the mandates of open access. 2020 horizon (UE) and Spanish Law of science Hernández San Miguel, FJ. (2013). Como cumplir los mandatos de acceso abierto. http://hdl.handle.net/10251/34087.

  6. Bullying: a escola como campo de guerra

    OpenAIRE

    Cossalter, Mônica Elizabeth

    2012-01-01

    A presente pesquisa tem como foco de estudos os bullies. Para tal, apresenta um amplo quadro de casos de bullying no Brasil e no mundo, estudados por pesquisadores diversos e ocorridos em ambientes físicos e virtuais. Analisa questões como agressividade, violência, preconceito, indústria cultural e instituição escolar. Realiza um levantamento semântico dos termos das agressões verbais dos bullies apontando preconceitos subjacentes, investiga qual o discurso social por trás dos ...

  7. La imagen del Inca como benefactor

    Directory of Open Access Journals (Sweden)

    Juan Miguel Espinoza Portocarrero

    2010-07-01

    Full Text Available A partir de tres crónicas coloniales y de tres visiones historiográficas sobre los incas producidas en el siglo XX, y apelando a las herramientas metodológicas de la historia de las categorías, se pretende rastrear los discursos sobre la imagen del Inca como benefactor de la sociedad andina. El objetivo es dar luces sobre los discursos históricos que entienden al Inca como un modelo ideal de autoridad política y su carácter de construcción social afianzada por la historiografía.

  8. La fenomenología como atavismo

    OpenAIRE

    Galán, Iván

    2009-01-01

    This paper deals with phenomenology as a result of phenomenological freedom in its possibility of understanding a phenomenon as wild phenomenon. From this perspective, we are enabled to transcend established symbolic systems and to pose the question on the existence of a sense which is immature, not-saturated and imperfect without exception.El artículo pretende mostrar la vigencia de la fenomenología como expresión de la libertad fenomenológica, como posibilidad siempre abierta de acceder al ...

  9. [Rhino-orbital mucormycosis with orbital abscess: a case report].

    Science.gov (United States)

    Tatar, Emel Cadallı; Sürenoğlu, Unzile Akpınar; Işık, Eray; Tütüncü, Ediz; Korkmaz, Hakan

    2011-01-01

    Sinonasal mucormycosis is a rare, life-threatening and insidious fungal infection. Uncontrolled diabetes mellitus and immunsupression are the most important risk factors. The infection is clinically characterized by black necrotic tissues and crusting in the nasal cavity. In acute fulminant rhinosinusitis and particularly in infections caused by mucor species, black scar tissues seen on the nasal mucosa are pathognomonic. High level of suspicion in the risk group the diagnosis is confirmed by histopathological examination. The rhinoorbital form is even rarer and the findings may range from orbital pain to ophtalmoplegia and blindness. In this report we present a 72-year-old female patient with uncontrolled type 2 diabetes mellitus who was admited with the complaints of exophtalmos in the left eye, diplopia and headache. In the physical examination there was purulent discharge in the middle meatus and left orbital abscess was detected on computed tomography. We performed an emergency endoscopic sinus surgery. While we did not observe any necrotic tissues, granulation tissues were detected and pus was drained from the orbital cavity. The result of the histopathological examination was reported as invasive mucormycosis. We presented this case to emphasize the importance of early diagnosis and treatment of rhinoorbital mucormycosis.

  10. Gestão agroecológica de microbacias hidrográficas através de técnicas de geoprocessamento e sensoriamento remoto: caso Fazenda Pantanoso Agroecological management of wathersheds trough remote sensing and geoprocessing techniques: the Pantanoso Farm case

    Directory of Open Access Journals (Sweden)

    Fioravante Jaekel dos Santos

    2004-12-01

    Full Text Available O manejo sustentado de agroecossistemas passa pelo planejamento de uso dos mesmos, para o que necessita serem avaliados os recursos naturais e as condições sociais, culturais e econômicas dos habitantes. Técnicas de geoprocessamento e sensoriamento remoto, que permitem avaliar os recursos de grandes áreas e anexá-los a bancos de dados georreferenciados, foram utilizados para caracterizar o meio físico e planejar o uso da fazenda El Pantanoso, Departamento de Cerro Largo, Uruguai. Dados topográficos, planialtimétricos, de solo e uso atual, foram usados para gerar os planos de informação: mapa base, modelo numérico do terreno, declividade, solos, aptidão de uso agrícola dos solos, uso atual, zoneamento ambiental e conflitos de uso. A pesquisa mostra que a região apresenta Planossolos, Argissolos, Chernossolos, Vertissolos, Organossolos, Neossolos e Gleissolos e que os mesmos apresentam ampla faixa de aptidão de uso, o que facilita seu zoneamento ambiental. Considerando-se que a tradicional pecuária desenvolvida nas áreas de topografia ondulada e arroz nas várzeas, constitui o uso adequado dos solos, então lavouras de arroz encontradas ao longo dos sistemas de drenagem, onde deveria ser mantida a vegetação ciliar natural, constitui o principal conflito de uso relacionado ao zoneamento ambiental da região. O geoprocessamento e sensoriamento remoto mostraram-se eficientes no planejamento de uso da Fazenda Pantanoso.The sustainable management of agro-ecological systems go through the planning of their use. To reach this objective, the natural resources as well as the social, cultural and economical conditions of the inhabitants of the study area need to be evaluated. Remote sensing and geoprocessing techniques, which permit the evaluation of the natural resources and organize georeferenced data bases, were applied to characterize the physical environment and to plan the use of the El Pantanoso Farm, Cerro Largo Department

  11. Integração de Dados de Sensoriamento Remoto e Métodos de Análise Espacial em Remanescentes Florestais: Uma Contribuição para o Laboratório de Geografia da Saúde da UNESP de Presidente Prudente | Integration of Remote Sensing and Spatial Analysis Methods i

    Directory of Open Access Journals (Sweden)

    Eduardo Augusto Werneck Ribeiro

    2014-05-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE Introdução: Este projeto de pesquisa é parte de uma proposta de desenvolvimento institucional que dará subsídios técnico–científicos para a implementação de métodos de aquisição, representação e análise de dados em sensores remotos voltados aos estudos do Laboratório de Geografia da Saúde da UNESP de Presidente Prudente, em particular no desenvolvimento e análise de indicadores ambientais em remanescentes florestais e suas correlações com a saúde pública. Desenvolvimento: Estamos desenvolvendo e aprimorando métodos de análise espacial em Geografia, por meio de dados de sensores remotos e levantamentos fitossociológicos nas áreas de remanescentes florestais no oeste paulista. Nesta etapa, estamos aprimorando o modelo de predição (inferência de ocorrência de insetos transmissores de doenças. Atualmente, o projeto já colabora com outros três atividades desenvolvidas no laboratório, com a participação e coorientação em iniciação cientifica e aprimoramento técnico. Considerações finais: Colaborando com outras pesquisas (projeto Biota/FAPESP esperamos suprir a deficiência de dados relativos à características descritoras da paisagem para inferência de vetores de doenças endêmicas. Espera-se a partir deste estudo exploratório, utilizar imagens de satélite multi e hiperespectrais, a fim de mapear áreas propícias para a ocorrência de doenças decorrentes da degradação e desequilíbrio ambiental, a partir da integração de dados espectrorradiométricos. /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso

  12. Aiming at a 1-cm orbit for low earth orbiters: Reduced-dynamic and kinematic precise orbit determination

    NARCIS (Netherlands)

    Visser, P.N.A.M.; Van den IJssel, J.

    2003-01-01

    The computation of high-accuracy orbits is a prerequisite for the success of Low Earth Orbiter (LEO) missions such as CHAMP, GRACE and GOCE. The mission objectives of these satellites cannot be reached without computing orbits with an accuracy at the few cm level. Such a level of accuracy might be a

  13. Heidegger E A Técnica Moderna Como Perigo E Como Salvação

    Directory of Open Access Journals (Sweden)

    Robson Costa Cordeiro

    2014-04-01

    Full Text Available O mundo contemporâneo é marcado por uma compreensão de técnica que se ergue como tal a partir de um sentido próprio e autônomo. Este sentido pode ser caracterizado como um logos que se constitui a partir de sua própria natureza e se manifesta como tecnologia no decorrer da história. Compreender esse sentido e assumi-lo como condição de nossa existência no mundo é comprender a técnica como nossa herança e nosso envio. Nesse sentido, compreender a essência da técnica é fundamental para o mundo contemporâneo, assumindo que, nesse processo, consiste o perigo e a salvação da espécie.

  14. Diseno e Implementación de un Sistema Automatizado para Control Remoto de Iluminación en Conformidad de la Tecnología INSTEON y Optimización del Sistema de Seguridad CCTV en el Edificio GIMPROMED

    Directory of Open Access Journals (Sweden)

    Ronald Moreno

    2012-11-01

    Full Text Available El presente documento describe la implementación de un sistema automatizado y la optimización del sistema de seguridad CCTV (circuito cerrado de televisión para el edificio GIMPROMED. El sistema estará basado en la tecnología INSTEON y se orientara principalmente al control remoto de iluminación, y del equipo de climatización (aire acondicionado. La monitorización, supervisión y control del sistema se realizará a través de un software propietario desarrollado en lenguaje de programación de alto nivel JAVA, con un diseño personalizado y en base a los requerimientos del usuario. Los dispositivos del sistema automatizado serán seleccionados tomando en cuenta los tipos de cargas a controlar, el espacio físico disponible y la distribución de circuitos eléctricos. La optimización del circuito cerrado de televisión traerá consigo la implementación de un sistema flexible que permite integrar los dispositivos analógicos con las nuevas tecnologías existentes a fin de ofrecer una solución eficiente, robusta y flexible. En suma, este sistema, coadyuvará al desarrollo integral de la empresa, y proporcionara un ambiente productivo y eficiente a través de la automatización con el fin de brindar seguridad y respaldo a las personas que trabajan en ella.

  15. Robustness analysis method for orbit control

    Science.gov (United States)

    Zhang, Jingrui; Yang, Keying; Qi, Rui; Zhao, Shuge; Li, Yanyan

    2017-08-01

    Satellite orbits require periodical maintenance due to the presence of perturbations. However, random errors caused by inaccurate orbit determination and thrust implementation may lead to failure of the orbit control strategy. Therefore, it is necessary to analyze the robustness of the orbit control methods. Feasible strategies which are tolerant to errors of a certain magnitude can be developed to perform reliable orbit control for the satellite. In this paper, first, the orbital dynamic model is formulated by Gauss' form of the planetary equation using the mean orbit elements; the atmospheric drag and the Earth's non-spherical perturbations are taken into consideration in this model. Second, an impulsive control strategy employing the differential correction algorithm is developed to maintain the satellite trajectory parameters in given ranges. Finally, the robustness of the impulsive control method is analyzed through Monte Carlo simulations while taking orbit determination error and thrust error into account.

  16. Overview of the Mars Reconnaissance Orbiter mission

    Science.gov (United States)

    Mateer, B.; Graf, J.; Zurek, R.; Jones, R.; Eisen, H.; Johnston, M.; Jai, D. B.

    2002-01-01

    The Mars Reconnaissance Orbiter will deliver to Mars orbit a payload to conduct remote sensing science observations, characterize sites for future landers, and provide critical telecom/navigation relay capability for follow-on missions.

  17. Tumors of the orbit; Orbitatumoren

    Energy Technology Data Exchange (ETDEWEB)

    Mueller-Forell, Wibke [Klinikum der Univ. Mainz (Germany). Inst. fuer Neuroradiologie

    2008-09-15

    This short review will present an overview not only of the findings in imaging, but the main clinical symptoms of the different orbital space occupying lesions, (not only different tumors, but even tumor-like lesions), as those should be included in differential diagnostic consideration. This should lead to a targeted diagnostic procedure in the individual patient. Basic knowledge of orbital anatomy is as important as the knowledge of the pros and contra's of computed tomography (CT) and magnetic resonance imaging (MRI), which should influence the examination protocol. Imaging findings of the most important tumors/lesions of the globe, the intraconal and extraconal space as well as of the optic nerve are presented with different examples (without any demand of completeness). (orig.)

  18. Canadian Meteor Orbit Radar (CMOR

    Directory of Open Access Journals (Sweden)

    A. R. Webster

    2004-01-01

    Full Text Available The radar system described here (CMOR comprises a basic 5-element receiving system, co-located with a pulsed transmitter, specifically designed to observe meteor echoes and to determine their position in space with an angular resolution of ~1° and a radial resolution of ~3 km. Two secondary receiving sites, a few km distant and arranged to form approximately a right angle with the base station, allow the determination of the velocity (speed and direction of the meteor that, together with the time of occurrence, lead to an estimate of the orbit of the original meteoroid. Some equipment details are presented along with a method used to determine the orbits. Representative echoes are shown and observations on the 2002 Leonid shower presented.

  19. SILEX in-orbit performances

    Science.gov (United States)

    Planche, Gilles; Chorvalli, Vincent

    2004-06-01

    PASTEL embarked on-board SPOT4, French LEO earth observation satellite, and OPALE mounted on-board ARTEMIS, European GEO telecommunication satellite are the key components of SILEX (Semi-conductor Inter-satellite Link Experiment) system. Launched in March 1998, PASTEL terminal was first verified via star tracking. Then, first SILEX optical communication was successfully performed in December 2001 with ARTEMIS at 31000 km. Following 12 months ARTEMIS orbit rising, SILEX commissioning phase was successfully achieved in spring 2003. Today, more than hundred successful optical communications have been achieved. On 1st of October 2003, the SILEX optical link was declared fully operational by the European and French space agencies. After a recall of SILEX architecture, design and on-ground verification, this paper reports on in-orbit results.

  20. Como una luna en el agua [Score

    Directory of Open Access Journals (Sweden)

    Francisco del Pino

    2014-12-01

    Full Text Available The title of the solo piano piece Como una luna en el agua, composed between June and July of 2014, refers to the end of the seventh chapter of the novel Rayuela (Hopscotch by the Argentine writer Julio Cortázar, in which an allegorical description of a kiss takes the form of a prose poem.

  1. El tesoro como objeto de derechos reales

    OpenAIRE

    Montes Bru, Rafael

    1989-01-01

    Posibilidad de constituir sobre el tesoro un derecho real independiente del bien que lo contiene. Bien sea un derecho real at??pico o una servidumbre personal de acuerdo con el numerus apertus que impera en nuestro derecho y del principio de autonom??a de la voluntad. As?? como otras materias relacionadas con el tesoro.

  2. Definitivamente, la arquitectura como modo de vida

    Directory of Open Access Journals (Sweden)

    Luis Fernando Carrasco Zaldúa

    2015-05-01

    Full Text Available Arturo Robledo. La arquitectura como modo de vida. Beatriz García Moreno et al. Alcaldía Mayor de Bogotá, Instituto Distrital de Patrimonio Cultural, Universidad Nacional de Colombia, Bogotá, 2010, 240 págs., il.

  3. La biblioteca como editora de contenidos

    Directory of Open Access Journals (Sweden)

    Alonso-Arévalo, Julio

    2015-12-01

    Full Text Available Una de las características más innovadoras de la biblioteca del siglo 21 tiene que ver con la toma de una postura activa frente a la gestión y generación de contenidos. Con la llegada de la Web 2.0 las bibliotecas no sólo siguen salvaguardando y difundiendo información como han venido realizando a lo largo de su historia, también cada vez con más frecuencia crean nueva información con el objetivo de prestar los mejores servicios a sus ciudadanos, a través de recursos y servicios tales como la elaboración guías de investigación, boletines de alerta y novedades, recursos web, información a través de sus blogs, y como administradores de contenidos a través de repositorios y revistas de acceso abierto. Un paso más allá en esta dinámica tienen que ver con la biblioteca como editora y distribuidora de libros, especialmente en el ámbito local, siendo la impulsora, formadora, dinamizador y difusoras de las obras de los autores de su comunidad.

  4. El lenguaje como fundamento del derecho

    OpenAIRE

    2012-01-01

    En este artículo se rebate la concepción tradicional de la cultura jurídica según la cual el lenguaje es un simple instrumento de los juristas. Muestra como el Estado de Derecho y la democracia, fundan su legitimidad en el lenguaje, lo cual exige considerarlo en su significado más profundo.

  5. DENEGRINDO A FILOSOFIA: O PENSAMENTO COMO COREOGRAFIA

    Directory of Open Access Journals (Sweden)

    Renato Noguera

    2011-12-01

    Full Text Available Partindo da ideia de Deleuze que filosofia é criar conceitos, este artigo tem como objetivo apresentar a filosofia afroperspectivista, criando conceitos para articular ensino de filosofia e a educação das relações etnicorraciais. O conceito de denegrir trabalha para problematizar o nascimento da filosofia na busca por uma nova coreografia do pensamento.

  6. Hume: a teoria social como sistema

    National Research Council Canada - National Science Library

    Kuntz, Rolf

    2011-01-01

    Hume defende na Investigação sobre o Entendimento Humano a parcimônia no uso de princípios explicativos. Tenta-se mostrar, neste artigo, como ele procurou seguir essa diretriz em seus trabalhos sobre os sentimentos morais...

  7. EL PERIODISMO CIVICO COMO COMUNICACION POLITICA

    Directory of Open Access Journals (Sweden)

    Ana María Miralles C.

    1998-01-01

    Full Text Available La autora retoma el ejercicio del periodismo cívico como el espacio en el cual la formación de la opinión pública adquiere características de un proyecto político dinámico en el que el ciudadano es el ente fundamental.

  8. COMO CONSTRUIR CIDADES SUSTENTÁVEIS?

    Directory of Open Access Journals (Sweden)

    Mônica Michelotti Loureiro

    2013-04-01

    Full Text Available Alcançar para as Cidades o patamar de sustentáveis, é uma pretensão necessária, já que, atualmente, são evidentes as consequências do desenvolvimento desenfreado e irresponsável. A abordagem da questão ambiental urbana está entre os temas de maior relevância no mundo atual, devido ao crescimento demasiado das cidades e à ausência de estruturas sustentáveis capazes de manter ambientes equilibrados nos espaços urbanos. Propõem-se, ações conjuntas tanto da administração, como dos grupos sociais, na busca de um ambiente urbano sustentável. A metodologia utilizada para realização do trabalho foi revisão bibliográfica, onde se almeja destacar a sustentabilidade como forma de prevenção do meio ambiente, assim como, a importância de ações sustentáveis como fonte de promoção de cidadania. Por fim, há uma gama de atitudes, que podem melhorar a qualidade de vida dos cidadãos de forma equitativa.

  9. The rehybridization of electronic orbitals in carbon nanotubes

    Institute of Scientific and Technical Information of China (English)

    Ouyang Yu; Peng Jing-Cui; Wang Hui; Peng Zhi-Hua

    2008-01-01

    Rehybridization of electronic orbitals in carbon nanotubes contains tilting angles of π orbital, electrons wavefunc-tions of π orbital and σ orbital, degrees of hybridization, etc. In this paper, we have obtained analytical formulas of tilting angle of π orbital relative to tube surface, electrons wavefunctions of π orbital and σ orbital, degrees of hybridization, separately, as well as the numerical results.

  10. Anteromedial Approach to the Orbit

    OpenAIRE

    DEDA, Haluk; Ugur, Hasan Çaglar; Yorulmaz, Irfan; Kucuk, Babur

    2001-01-01

    This study evaluated the surgical results of the anteromedial approach for treatment of orbital lesions in 16 patients. Pre- and postoperatively, all patients underwent a complete physical examination focusing on the head and neck area including a thorough ophthalmologic evaluation, computerized tomography, and magnetic resonance imaging. The surgical approach was limited to a medial orbitotomy in five patients; the remaining 11 patients underwent a medial orbitotomy combined with an external...

  11. A new kinematical definition of orbital eccentricity

    Directory of Open Access Journals (Sweden)

    Ninković S.

    2009-01-01

    Full Text Available A new concept of orbital eccentricity is given. The dimensionless quantities proposed in the present paper to serve as orbital eccentricities have a kinematical nature. The purpose is to use them in describing the motion for the case of three-dimensional orbits. A comparison done for nearly planar orbits shows that the values of the eccentricities proposed here do not differ significantly from those corresponding to the eccentricities of geometric nature usually applied.

  12. Understanding pediatric bacterial preseptal and orbital cellulitis

    Directory of Open Access Journals (Sweden)

    Gonzalez Mithra

    2010-01-01

    Full Text Available Pediatric preseptal and orbital cellulitis are infectious disorders that result in periorbital inflammation. Preseptal cellulitis is often associated with breaches in the skin barrier whereas orbital cellulitis is commonly associated with paranasal sinusitis. Orbital cellulitis may be associated with subperiosteal abscess. It is important to distinguish between preseptal from orbital cellulitis. Clinical examination and diagnostic imaging are useful in determining appropriate management. Patients are usually treated with broad spectrum antibiotics and surgery when indicated.

  13. Spin-orbit ferromagnetic resonance

    Science.gov (United States)

    Ferguson, Andrew

    2013-03-01

    In conventional magnetic resonance techniques the magnitude and direction of the oscillatory magnetic field are (at least approximately) known. This oscillatory field is used to probe the properties of a spin ensemble. Here, I will describe experiments that do the inverse. I will discuss how we use a magnetic resonance technique to map out the current-induced effective magnetic fields in the ferromagnetic semiconductors (Ga,Mn)As and (Ga,Mn)(As,P). These current-induced fields have their origin in the spin-orbit interaction. Effective magnetic fields are observed with symmetries which resemble the Dresselhaus and Rashba spin-orbit interactions and which depend on the diagonal and off-diagonal strain respectively. Ferromagnetic semiconductor materials of different strains, annealing conditions and concentrations are studied and the results compared with theoretical calculations. Our original study measured the rectification voltage coming from the product of the oscillatory magnetoresistance, during magnetisation precession, and the alternating current. More recently we have developed an impedance matching technique which enables us to extract microwave voltages from these high resistance (10 k Ω) samples. In this way we measure the microwave voltage coming from the product of the oscillating magneto-resistance and a direct current. The direct current is observed to affect the magnetisation precession, indicating that anti-damping as well as field-like torques can originate from the spin-orbit interaction.

  14. Proxima's orbit around Alpha Centauri

    CERN Document Server

    Kervella, P

    2016-01-01

    Proxima and Alpha Centauri AB have almost identical distances and proper motions with respect to the Sun. Although the probability of such similar parameters is in principle very low, the question whether they actually form a single gravitationally bound triple system has been open since the discovery of Proxima one century ago. Owing to recent high precision radial velocity measurements and the revision of the parameters of the Alpha Cen pair, we show that Proxima and Alpha Cen are gravitationally bound with a high degree of confidence. The orbital period of Proxima is approximately 600 000 years, with a moderate excentricity of 0.42 +0.07 -0.08. Proxima comes within 5.3 -0.9 +1.2 kAU of Alpha Cen at periastron, and the apastron occurs at 12.9 +0.3 -0.1 kAU. This orbital motion may have influenced the formation or evolution of the recently discovered planet orbiting Proxima as well as circumbinary planet formation around Alpha Cen.

  15. Los nematodos como indicadores ambientales en agroecosistemas

    Directory of Open Access Journals (Sweden)

    S. Sánchez-Moreno

    2013-01-01

    Full Text Available El suelo es una unidad básica en el funcionamiento y dinámica de los agroecosistemas, ya que proporciona el sustento físico y biológico para la producción vegetal. Aunque el efecto de las prácticas antropógenas sobre el componente abiótico del suelo está ampliamente documentado, existen pocas herramientas capaces de medir el impacto de estas prácticas en la biodiversidad del ecosistema edáfico. Los nematodos del suelo constituyen un grupo de invertebrados de elevada importancia ecológica que presentan atributos que les convierte en valiosas herramientas como indicadores biológicos. Su extraordinaria diversidad taxonómica y funcional, su abundancia y ubiquidad, y la rápida respuesta de las comunidades de nematodos edáficos a perturbaciones ambientales, como el laboreo o la aplicación de insumos químicos, han convertido la nematofauna en un indicador clave en la evaluación del efecto del manejo agrario sobre los ecosistemas. La participación de los nematodos en múltiples eslabones funcionales dentro de la red trófica edáfica hace que sean también indicadores de numerosos procesos ecológicos y biológicos, como el mantenimiento del ciclo de nutrientes o el control de especies plaga.Este trabajo sintetiza los resultados obtenidos en la utilización de la nematofauna como indicadora de perturbaciones ambientales en los agroecosistemas, y expone una breve reseña del estado de la Nematología como disciplina científica en España.

  16. The geostationary orbit and developing countries

    Science.gov (United States)

    Medina, E. R.

    1982-01-01

    The geostationary orbit is becoming congested due to use by several countries throughout the world, and the request for use of this orbit is increasing. There are 188 geostationary stations in operation. An equitable distribution of stations on this orbit is requested.

  17. Information Measures for Statistical Orbit Determination

    Science.gov (United States)

    Mashiku, Alinda K.

    2013-01-01

    The current Situational Space Awareness (SSA) is faced with a huge task of tracking the increasing number of space objects. The tracking of space objects requires frequent and accurate monitoring for orbit maintenance and collision avoidance using methods for statistical orbit determination. Statistical orbit determination enables us to obtain…

  18. The History of the Molniya Orbit

    Science.gov (United States)

    Kettering Group

    Arthur C. Clarke's name is often linked with the Geostationary orbit as a result of his 1945 paper in Wireless World. Less well-known is where the credit for discovering the Molniya orbit should lie. This paper presents the evidence uncovered to date concerning the original concept and provides some insight into the ways in which the orbit has subsequently been exploited.

  19. Atomic Orbitals for the New Millennium

    CERN Document Server

    Williams, J M

    1999-01-01

    This very short article introduces a set of nested atomic orbitals, called MCAS, to replace the current s, p, d, and f orbitals. The simplest orbital is a tetrahedrally directed, four lobed, mono-orbital instead of the spherical s orbital. All the other orbitals, no matter what their energy (shell) level is, are nested with this one. All the electrons have the same spin and only one electron is allotted to each orbital. Electron spin pairing is accomplished through opposing orbitals instead of actual electron spin reversal. Orbital energy level is maintained by nuclear propulsion through perigee kick. Orbitals hybridize as Aufbau proceeds, in contrast to the inflexible, current building model. The inert gases have completely uniform electronic shells that contain only one orbital type per shell. Since outer completed shells have only one type of orbital, all eight outer electrons are identical rather than being of two types as occurs in the current model; hence, Lewis' electron-dot octet. Hydrogen should resi...

  20. The orbital record in stratigraphy

    Science.gov (United States)

    Fischer, Alfred G.

    1992-01-01

    Orbital signals are being discovered in pre-Pleistocene sediments. Due to their hierarchical nature these cycle patterns are complex, and the imprecision of geochronology generally makes the assignment of stratigraphic cycles to specific orbital cycles uncertain, but in sequences such as the limnic Newark Group under study by Olsen and pelagic Cretaceous sequence worked on by our Italo-American group the relative frequencies yield a definitive match to the Milankovitch hierarchy. Due to the multiple ways in which climate impinges on depositional systems, the orbital signals are recorded in a multiplicity of parameters, and affect different sedimentary facies in different ways. In platform carbonates, for example, the chief effect is via sea-level variations (possibly tied to fluctuating ice volume), resulting in cycles of emergence and submergence. In limnic systems it finds its most dramatic expression in alternations of lake and playa conditions. Biogenic pelagic oozes such as chalks and the limestones derived from them display variations in the carbonate supplied by planktonic organisms such as coccolithophores and foraminifera, and also record variations in the aeration of bottom waters. Whereas early studies of stratigraphic cyclicity relied mainly on bedding variations visible in the field, present studies are supplementing these with instrumental scans of geochemical, paleontological, and geophysical parameters which yield quantitative curves amenable to time-series analysis; such analysis is, however, limited by problems of distorted time-scales. My own work has been largely concentrated on pelagic systems. In these, the sensitivity of pelagic organisms to climatic-oceanic changes, combined with the sensitivity of botton life to changes in oxygen availability (commonly much more restricted in the Past than now) has left cyclic patterns related to orbital forcing. These systems are further attractive because (1) they tend to offer depositional continuity

  1. Orbital, subconjunctival, and subcutaneous emphysema after an orbital floor fracture

    OpenAIRE

    2013-01-01

    Osama H Ababneh Department of Ophthalmology, The University of Jordan and Jordan University Hospital, Amman, Jordan Abstract: A 16-year-old boy presented to the emergency department with the complaint of a sudden, painful left eye and proptosis after an episode of sneezing. A few hours earlier, he had sustained a blunt trauma to the left orbit as the result of a fistfight. The initial examination showed subcutaneous and subconjunctival emphysema. Visual acuity in the left eye was 20/30 (0.67...

  2. A Survey of Research on Service-Spacecraft Orbit Design

    Institute of Scientific and Technical Information of China (English)

    LI Yue; ZHANG Jian-xin; ZHANG Qiang; WEI Xiao-peng

    2013-01-01

    On-orbit service spacecraft orbit problem has been addressed for decades. The research of on-orbit service spacecraft orbit can be roughly divided into orbit design and orbit optimization. The paper mainly focuses on the orbit design problem. We simply summarize of the previous works, and point out the main content of the on-orbit service spacecraft orbit design. We classify current on-orbit service spacecraft orbit design problem into parking-orbit design, maneuvering-orbit design and servicing-orbit design. Then, we give a detail description of the three specific orbits, and put forward our own ideas on the existed achievements. The paper will provide a meaningful reference for the on-orbit service spacecraft orbital design research.

  3. EL DERECHO COMO COMPLEJIDAD DE SABERES DIVERSOS

    Directory of Open Access Journals (Sweden)

    María Isolina Dabove

    2011-08-01

    Full Text Available El motivo principal de este trabajo consiste en observar la estrecha vinculación que existe entre los distintos grados del saber y la configuración misma del mundo jurídico como objeto cultural. Así pues, desde esta perspectiva, se advierte que el Derecho puede ser considerado un fenómeno complejo, en gran medida, debido a los distintos tipos de conocimiento que intervienen en su construcción. El saber, en este marco, será entendido como aquel conjunto de información referida a hechos o abstracciones, que se expresan en proposiciones lógicas y responden a algún criterio de verdad admitido como válido para el caso. Sin embargo, es preciso señalar también que esta definición genérica del conocimiento debe completarse con los conceptos propios de los distintos grados (o clases de saberes que fueron consolidándose históricamente, tales como la filosofía, la ciencia, la tecnología, el saber empírico o popular y el religioso[1]. Hasta donde entendemos, sobre cada uno de estos términos se ha ido desplegando una rica trama teórica. No obstante, en este artículo sólo expondré una breve caracterización de los mismos, con el propósito de señalar de manera aproximativa, por qué razón el Derecho puede ser comprendido como una complejidad, resultante de la interacción diversa de todos los tipos de conocimiento mencionados y no sólo, como el producto de la ciencia o la filosofía, en particular. Veamos, entonces en primer lugar, cuáles son los rasgos más destacados de los modelos gnoseológicos vigentes; para poder observar, en segundo término, los modos por los cuales todos ellos posibilitan la construcción del Derecho en la actualidad.

  4. New Orbit Propagator to Be Used in Orbital Debris Evolutionary Models

    OpenAIRE

    Narumi, Tomohiro; Hanada, Toshiya

    2007-01-01

    An orbital environment debris evolutionary model for low Earth orbit has been developed at Kyushu University. A fast orbit propagator is essentially needed in such an evolutionary model because the number of space debris larger than 1 cm in low earth orbit is very large and it takes much time to compute long-term orbital changes of space debris. The effects of orbital perturbations are investigated for hundreds of years, and the rate of change in orbital elements were invented by earlier publ...

  5. Space Shuttle Orbiter auxiliary power unit status

    Science.gov (United States)

    Reck, M.; Loken, G.; Horton, J.; Lukens, W.; Scott, W.; Baughman, J.; Bauch, T.

    An overview of the United States Space Shuttle Orbiter APU, which provides power to the Orbiter vehicle hydraulic system, is presented. Three complete APU systems, each with its own separate fuel system, supply power to three dedicated hydraulic systems. These in turn provide power to all Orbiter vehicle critical flight functions including launch, orbit, reentry, and landing. The basic APU logic diagram is presented. The APU includes a hydrazine-powered turbine that drives a hydraulic pump and various accessories through a high-speed gearbox. The APU also features a sophisticated thermal management system designed to ensure safe and reliable operation in the various launch, orbit, reentry, and landing environments.

  6. Liouville theory and special coadjoint Virasoro orbits

    OpenAIRE

    Gorsky, A.; Johansen, A.

    1993-01-01

    We describe the Hamiltonian reduction of the coajoint Kac-Moody orbits to the Virasoro coajoint orbits explicitly in terms of the Lagrangian approach for the Wess-Zumino-Novikov-Witten theory. While a relation of the coajoint Virasoro orbit $Diff \\; S^1 /SL(2,R)$ to the Liouville theory has been already studied we analyse the role of special coajoint Virasoro orbits $Diff \\; S^1/\\tilde{T}_{\\pm ,n}$ corresponding to stabilizers generated by the vector fields with double zeros. The orbits with ...

  7. Astrometric Determination of VSOP-2 Orbital Parameters

    Science.gov (United States)

    Fomalont, E.; Moellenbrock, G.; Claussen, M.

    2009-08-01

    VSOP-2 phase referencing, needed to image faint sources and to determine accurate positions, will require an orbit accuracy of about 2 cm at 23 GHz. This accuracy, however, may not be obtainable by direct orbital measurements. We propose an observation scheme, similar to that used at the VLBA, to be included during a phase referencing observation of about one orbit in order to determine a more accurate orbit determination. We show the effects of orbit errors, explain the suggested observations and reduction methods, and discuss the potential problems that might impede the use of this technique.

  8. Novel Surgical Approaches to the Orbit.

    Science.gov (United States)

    Campbell, Ashley A; Grob, Seanna R; Yoon, Michael K

    2015-01-01

    Determining safe surgical access to the orbit can be difficult given the complex anatomy and delicacy of the orbital structures. When considering biopsy or removal of an orbital tumor or repair of orbital fractures, careful planning is required to determine the ideal approach. Traditionally, this has at times necessitated invasive procedures with large incisions and extensive bone removal. The purpose of this review was to present newly techniques and devices in orbital surgery that have been reported over the past decade, with aims to provide better exposure and/or minimally invasive approaches and to improve morbidity and/or mortality.

  9. Holonomy invariance, orbital resonances, and kilohertz QPOs

    CERN Document Server

    Abramowicz, M A; Kluzniak, W; Thampan, A V; Wallinder, F

    2002-01-01

    Quantized orbital structures are typical for many aspects of classical gravity (Newton's as well as Einstein's). The astronomical phenomenon of orbital resonances is a well-known example. Recently, Rothman, Ellis and Murugan (2001) discussed quantized orbital structures in the novel context of a holonomy invariance of parallel transport in Schwarzschild geometry. We present here yet another example of quantization of orbits, reflecting both orbital resonances and holonomy invariance. This strong-gravity effect may already have been directly observed as the puzzling kilohertz quasi-periodic oscillations (QPOs) in the X-ray emission from a few accreting galactic black holes and several neutron stars.

  10. Membrana de poli (L-CO-D, L ÁCIDO LÁTICO-CO-TMC (PLDLA-TMC (70/30 com aloe vera para ser usado como curativo no tratamento de queimadura

    Directory of Open Access Journals (Sweden)

    Newton Maciel de Oliveira

    2016-10-01

    Full Text Available Ao longo da história, muitos tratamentos diferentes e, por vezes bizarros, têm sido prescritos para queimaduras. Desde os tempos mais remotos até os dias atuais, existe a necessidade de buscar novas terapias e drogas que funcionem como agentes tópicos para aliviar a dor e controlar a infecção em queimaduras. Dessa maneira, uma alternativa interessante às drogas sintéticas é a utilização de plantas, como um recurso natural, as quais podem ser úteis para o desenvolvimento de novas formulações e estratégias para melhorar a qualidade de vida. Neste trabalho foi utilizado o terpolímero poli (L-co-D, L ácido lático-co-TMC (PLDLA-co-TMC como matriz polimérica para a fabricação do curativo, sendo misturado a esse curativo o extrato de Aloe Vera, uma planta tropical que pertence à família Liliaceae, sendo conhecida por ser a mais antiga planta medicinal na natureza, a qual exibe propriedades anti-cancerígena, anti-oxidante, anti-bacteriana, cicatrizante e anti-viral. Além disso, outra vantagem do uso destes materiais está relacionada ao custo, uma vez que os produtos atualmente disponíveis para o tratamento de queimaduras são importados e apresentam valor elevado, inviabilizando o uso em larga escala. Neste trabalho, o estudo in vivo foi realizado por meio de 30 animais (ratos Wistar, divididos em 02 grupos conforme o tempo dos curativos (7 dias e 15 dias. Cada um, por sua vez, foi subdividido em 03 grupos de acordo com o tratamento aplicado: um grupo controle (sem a membrana PLDLA-co-TMC, tratamento 1 (com a membrana PLDLA-co-TMC sem Aloe Vera e tratamento 2 (com a membrana PLDLA-co-TMC/Aloe Vera com concentração de 10%.

  11. The harmonic structure of generic Kerr orbits

    CERN Document Server

    Grossman, Rebecca; Perez-Giz, Gabe

    2011-01-01

    Generic Kerr orbits exhibit intricate three-dimensional motion. We offer a classification scheme for these intricate orbits in terms of periodic orbits. The crucial insight is that for a given effective angular momentum $L$ and angle of inclination $\\iota$, there exists a discrete set of orbits that are geometrically $n$-leaf clovers in a precessing {\\it orbital plane}. When viewed in the full three dimensions, these orbits are periodic in $r-\\theta$. Each $n$-leaf clover is associated with a rational number, $1+q_{r\\theta}=\\omega_\\theta/\\omega_r$, that measures the degree of perihelion precession in the precessing orbital plane. The rational number $q_{r\\theta}$ varies monotonically with the orbital energy and with the orbital eccentricity. Since any bound orbit can be approximated as near one of these periodic $n$-leaf clovers, this special set offers a skeleton that illuminates the structure of all bound Kerr orbits, in or out of the equatorial plane.

  12. MEMORIA VISUAL COMO PARTE DEL PROCESO LECTOR

    OpenAIRE

    Gamero-Muñiz, Antonia

    2013-01-01

    Este trabajo tiene como objetivo indagar la relación entre los movimientos sacádicos, velocidad y comprensión lectora y la memoria visual en alumnos de 2ºESO, con el propósito de contribuir a la labor docente en los apoyos del aprendizaje de una correcta lectura y tomando como fundamentación teórica la importancia de la memoria visual en el proceso lector. Se ha seleccionado una muestra de 24 niños y 21 niñas con edades comprendidas entre 13 y 15 años. Se evaluaron los movimientos sacádico...

  13. La fenomenología como atavismo

    Directory of Open Access Journals (Sweden)

    Galán, Iván

    2009-04-01

    Full Text Available This paper deals with phenomenology as a result of phenomenological freedom in its possibility of understanding a phenomenon as wild phenomenon. From this perspective, we are enabled to transcend established symbolic systems and to pose the question on the existence of a sense which is immature, not-saturated and imperfect without exception.El artículo pretende mostrar la vigencia de la fenomenología como expresión de la libertad fenomenológica, como posibilidad siempre abierta de acceder al fenómeno en cuanto fenómeno puro, registro arquitectónico en el que, saltando por sobre los sistemas simbólicos instituidos, nos es permitido plantear en toda su radicalidad la pregunta por la existencia de un sentido siempre prematuro, no saturado y jamás clausurable.

  14. Como (Não crescer a 7%

    Directory of Open Access Journals (Sweden)

    Paulo Roberto Almeida

    2010-07-01

    Full Text Available Comentários a texto de Samuel Pinheiro Guimarães sobre a necessidade de o Brasil crescer a 7% como forma de superar o subdesenvolvimento e de aproximar a renda per capita dos níveis registrados nos EUA. Críticas tópicas das inconsistências econômicas do artigo, manifestadas nas preferências de políticas setoriais, entre elas a leniência com o fenômeno inflacionário, evidenciando lacunas dos argumentos expostos (mais políticos do que econômicos e indicando, como contraponto, os requisitos do crescimento e as reformas indispensáveis a tal efeito.

  15. La verdad como valor ético

    Directory of Open Access Journals (Sweden)

    Martínez Lupe

    1993-08-01

    Full Text Available

    Se considera la ''verdad'' como un valor ético, pues dá sentido al respeto ante los demás hombres, constituye uno de los pilares básicos sobre los que se asienta la conciencia moral de la comunidad y abarca todos los ámbitos de la vida humana. La "verdad", es definida semánticamente "como el momento en el cual una intención, un propósito, deben encontrar una verificación en la realidad". Sin embargo cada sistema filosófico implica y encarna una determinada concepción de la verdad, es decir el modo de relacionarse cognoscitivamente el hombre con la realidad.

  16. Orbital compression syndrome presenting as orbital cellulitis in a child with sickle cell anemia.

    Science.gov (United States)

    Douvoyiannis, Miltiadis; Fakioglu, Esra; Litman, Nathan

    2010-04-01

    Orbital bone infarction with subsequent orbital compression syndrome presenting as orbital cellulitis is reported in a child with sickle cell anemia. She deteriorated despite the use of antibiotics and improved after the surgical drainage of the collection. Radiographic findings, absence of sinusitis, hemorrhagic nature of the collection, and negative cultures all were consistent with orbital compression syndrome secondary to a vasoocclusive crisis. This condition needs to be differentiated from the more common orbital cellulitis secondary to sinusitis.

  17. El rock como conformador de identidades juveniles

    Directory of Open Access Journals (Sweden)

    Adrián de Garay

    1996-04-01

    Full Text Available El autor analiza la relación entre el rock y las identidades juveniles, a partir del abordaje de cinco “estilos” que se pueden identificar como constitutivos de éstas identidades. Ellos son: la jerga, la estética, las producciones culturales, los no-lugares y el territorio. Finaliza el artículo señalando algunos hitos importantes de la culturarockera en la ciudad de México.

  18. LAS COMUNICACIONES INTERPERSONALES COMO FACTOR DE APRENDIZAJE

    Directory of Open Access Journals (Sweden)

    Paco Cerezo Sánchez

    2010-01-01

    Full Text Available Durante la impartición de un curso en red aparecen múltiples comunicaciones, crecen como árboles que impiden ver el bosque, hasta que ese bosque de comunicaciones impide ver cada uno de los árboles. La formación en red funciona como un sistema complejo, donde las intervenciones de cada parte (alumno o docente influyen en todos los demás. Este documento aporta instrumentos que sirven al docente para ordenar ese bosque, para convertir ese bosque en un jardín a goce de todos, facilitando así los procesos de aprendizaje. El docente-formador, si actúa como facilitador de procesos, necesita comprender y manejar las comunicaciones y ese dominio es necesario tanto en el nivel semántico como en el nivel relacional de la comunicación. Este documento desarrolla las competencias de comunicación interpersonal del docente en su nivel relacional. Primero presenta un marco teórico para analizar las comunicaciones interpersonales que se dan en los grupos de aprendizaje en red, luego sugiere un gráfico en 2 coordenadas para situar dichas comunicaciones (y roles y propone un orden en la toma de decisiones sobre qué hacer con dichas comunicaciones. Los ejemplos aquí expuestos provienen de numerosos cursos de formación continua impartidos en red entre 2002 y 2008 a formadores y a técnicos adultos de la Unión Europea y de Latinoamérica.

  19. La Realidad Aumentada como complemento motivacional

    Directory of Open Access Journals (Sweden)

    Gazcón, Nicolás Fernando

    2016-06-01

    Full Text Available El acelerado avance de la tecnología permite que las tecnologías emergentes sean accesibles por todos los usuarios. Ejemplos de estas tecnologías son la Realidad Aumentada y la Reconstrucción 3D, que gracias a dispositivos como tabletas o teléfonos inteligentes, pueden utilizarse de manera ubicua. Éstas tienen un enorme potencial en el campo de la educación, ya sea como recurso para entender conceptos complejos, como para motivar el aprendizaje de nuevos contenidos. El desafío de estas tecnologías es integrarlas para que sean accesibles y fáciles de utilizar por los docentes y los alumnos. En este trabajo presentamos una metodología para motivar el aprendizaje tanto en tareas de campo, mediante el uso de la Reconstrucción 3D, como en el ámbito escolar mediante libros aumentados. Por medio de un caso de estudio introducimos la Reconstrucción 3D de elementos fósiles de un sitio paleontológico bonaerense, para luego incorporar estos contenidos generados en un libro aumentado. A partir de la digitalización de huellas y fósiles de sitios paleontológicos, se obtuvieron modelos 3D que se integraron en un ambiente de aprendizaje inmersivo en el aula mediante los libros aumentados. Presentamos las opiniones de docentes de distintas disciplinas, que resaltan las posibilidades de esta metodología para su inclusión en el ámbito educacional regional.

  20. Unidades de conservação como estratégia para a redução do desmatamento na Amazônia: o caso do Parque Estadual Monte Alegre / Protected Areas as a strategy to reduce deforestation in the Amazon: the case of Monte Alegre State Park

    Directory of Open Access Journals (Sweden)

    Denise Zanatta Martini

    2012-08-01

    Full Text Available ResumoUnidades de conservação de proteção integral buscam a manutenção dos ecossistemas livres de alterações causadas por interferência humana, admitindo apenas o uso indireto de seus recursos naturais. Portanto, este trabalho estudou a dinâmica do uso e cobertura da terra na unidade de conservação de proteção integral Parque Estadual Monte Alegre (PEMA do município de Monte Alegre (PA, bem como sua respectiva Zona de Amortecimento, para avaliar a efetividade de sua criação como iniciativa de preservação da biodiversidade local. Foram avaliados produtos de sensoriamento remoto dos anos de 1990, 2001 e 2011, sendo 2001 o ano de criação da unidade em estudo. O resultado permite afirmar que a criação da unidade de conservação PEMA foi importante, uma vez que ao observar dados referentes a dez anos de unidade percebe-se a diminuição do desflorestamento quando comparado ao período anterior à sua implantação. Porém, do ponto de vista conservacionista, tal resultado não é satisfatório, já que fatores que ameaçam a integridade biológica das áreas protegidas não deveriam ocorrer após sua criação. Medidas de proteção mais adequadas devem ser tomadas visando atingir o objetivo da unidade de conservação.

  1. Kalman Orbit Optimized Loop Tracking

    Science.gov (United States)

    Young, Lawrence E.; Meehan, Thomas K.

    2011-01-01

    Under certain conditions of low signal power and/or high noise, there is insufficient signal to noise ratio (SNR) to close tracking loops with individual signals on orbiting Global Navigation Satellite System (GNSS) receivers. In addition, the processing power available from flight computers is not great enough to implement a conventional ultra-tight coupling tracking loop. This work provides a method to track GNSS signals at very low SNR without the penalty of requiring very high processor throughput to calculate the loop parameters. The Kalman Orbit-Optimized Loop (KOOL) tracking approach constitutes a filter with a dynamic model and using the aggregate of information from all tracked GNSS signals to close the tracking loop for each signal. For applications where there is not a good dynamic model, such as very low orbits where atmospheric drag models may not be adequate to achieve the required accuracy, aiding from an IMU (inertial measurement unit) or other sensor will be added. The KOOL approach is based on research JPL has done to allow signal recovery from weak and scintillating signals observed during the use of GPS signals for limb sounding of the Earth s atmosphere. That approach uses the onboard PVT (position, velocity, time) solution to generate predictions for the range, range rate, and acceleration of the low-SNR signal. The low- SNR signal data are captured by a directed open loop. KOOL builds on the previous open loop tracking by including feedback and observable generation from the weak-signal channels so that the MSR receiver will continue to track and provide PVT, range, and Doppler data, even when all channels have low SNR.

  2. EL HOSPITAL COMO ORGANISMO ÉTICO

    Directory of Open Access Journals (Sweden)

    Gonzalo Herranz Rodríguez

    2008-01-01

    Full Text Available En la medicina hospitalaria se entrelazan las relaciones entre la ética médica y la ética de la gestión sanitaria. Son las relaciones entre el hospital en cuanto institución y las personas singulares. Algunos autores opinan que el hospital no puede existir como un organismo ético con vida propia en una sociedad pluralista. El autor defiende que el hospital no sólo es y se porta como una agente moral, sino que necesita serlo para sobrevivir. Para eso conviene que el hospital autodefina públicamente su misión y su filosofía, sus valores y sus principios, como normas que conformen un código o ideario ético pues, en buena medida, es un sujeto de responsabilidad moral, jurídica y social. Éste ideario es el proyecto humano que el hospital se debe dar a sí mismo y que ha de ser un estímulo interior para todos los que trabajan en él. Así mismo, debe hacer una apuesta decidida por la educación ética de los estudiantes y residentes que en él se forman.

  3. EL CONFLICTO COMO CONSTRUCTOR DE CIUDAD

    Directory of Open Access Journals (Sweden)

    Twiggy Ortegón

    2012-04-01

    Full Text Available El planteamiento central de este articulo, es el de sugerir una análisis en torno a algunas de las condiciones o mecanismo necesarios para que el conflicto opere como un potenciador de la diferencia y creador de alternativas para la convivencia Se realiza una distinción del concepto, un análisis de contenidos interaccionales en dinámicas de conflicto y su relación con el contexto urbano de Bogotá, enfocándose en ámbitos escolares. En ciudades como Bogotá, las discusiones y acciones que diferentes estamentos han emprendido frente a la manera de concebir y gestionar el conflicto, desembocan en la creación de diferentes organismos como los centros de conciliación, la aplicación de fórmulas y técnicas para la solución de conflictos, el desarrollo de propuestas desde entes administrativos a nivel distrital y las nuevas disposiciones que plantea la Ley 115 sobre Gobierno Escolar y manuales de convivencia.

  4. La escritura como dispositivo constituyente de sujeto

    Directory of Open Access Journals (Sweden)

    Francisco Antonio Arias Murillo

    2012-01-01

    Full Text Available Este artículo pretende demostrar el modo como la escritura se convierte en un “dispositivo transformador del hombre”, en la medida en que posibilita la creación de una nueva realidad. Esta es una actividad que le permite al hombre tomar distancia de su sí natural, trascender hasta saberse otro, repleto de alternativas, abierto y expuesto al cambio. Lo anterior le permite pensarse y tomar la existencia en sus manos, superar la dependencia y asumir su autonomía, como diría Foucault: “haciendo de su vida una obra de arte”. Además de lo anterior, el presente artículo expone cómo la escritura, particularmente académica, puede ser un referente válido e importante para visibilizar los modos como se constituye el sujeto, especialmente docente; o, por el contrario, cómo o de qué manera es constituido el sujeto docente por los discursos clásicos representacionales con los que se expresan y comunican las ciencias, las disciplinas y las profesiones actualmente.

  5. LA VIOLENCIA COMO EFECTO DE SOCIALIZACION

    Directory of Open Access Journals (Sweden)

    Gisela Daza Navarrete

    1995-01-01

    Full Text Available El espacio teórico abierto por Winnicott con el concepto de Espacio Potencial es un terreno fecundo para pensar la socialización, constituye por tanto el punto de partida de las reflexiones que aquí se presentan. Punto de partida solamente en cuanto su desarrollo en términos de un espacio, requiere de una nueva conceptualización que determine su lógica independientemente de la relación de un «yo» con lo «no- yo». Un espacio independiente del sujeto en el que la experiencia del vivir y la experiencia cultural tienen lugar como creación de sentido de la que resulta el sujeto como efecto de esa creación. La producción de sentido cobra así una importancia capital en la conceptualización de la socialización, por ello, la realizacion del proceso de producción o su impedimento constituyen el eje en el que se instalan o no las disponibilidades para la violencia. La institución se plantea entonces como acción que agencia u obstruye la posibilidad del proceso.

  6. SIG e sensoriamento remoto para a determinação do potencial da aqüicultura no baixo São João – RJ

    Directory of Open Access Journals (Sweden)

    Claudio Michael Völcker

    2009-05-01

    Full Text Available Este estudo foi realizado com o objetivo de identificar o potencial para o desenvolvimento da
    aqüicultura ao longo do baixo curso do rio São João, RJ. Para tal, foi construído um Sistema
    de Informação Geográfica a partir de várias imagens. Dois modelos foram desenvolvidos,
    integrando critérios ambientais importantes para as espécies eurihalinas já estabelecidas e
    cultivadas na área de estudo que incluem Litopenaeus vannamei (camarão branco,
    Macrobrachium rosenbergii (pitu, e Oreochromis niloticus (tilápia. Para a escolha das áreas
    aptas, utilizou-se processamento de diversas imagens integradas numa avaliação
    multicritério (MCE. Áreas com restrições para o desenvolvimento foram identificadas e
    excluídas. O Processo de Hierarquia Analítico (PHA foi usado para estabelecer pesos do
    MCE gerando áreas viáveis para cada espécie. A área total adequada encontrada foi de
    55,79 km2. No total foram encontrados 667 ha para L. vannamei, 4.697 ha para M.
    rosenbergii e 4.905 ha para O. niloticus. Estas informações poderão ser úteis ao processo
    de planejamento regional e tomada de decisões de gestores e investidores. Os resultados
    mostram o potencial de geração de novos empregos assim como o desenvolvimento da
    aqüicultura regional.

  7. On-orbit Passive Thermography

    Science.gov (United States)

    Howell, Patricia A.; Winfree, William P.; Cramer, K. Elliott

    2008-01-01

    On July 12, 2006, British-born astronaut Piers Sellers became the first person to conduct thermal nondestructive evaluation experiments in space, demonstrating the feasibility of a new tool for detecting damage to the reinforced carbon-carbon (RCC) structures of the Shuttle. This new tool was an EVA (Extravehicular Activity, or spacewalk) compatible infrared camera developed by NASA engineers. Data was collected both on the wing leading edge of the Orbiter and on pre-damaged samples mounted in the Shuttle s cargo bay. A total of 10 infrared movies were collected during the EVA totaling over 250 megabytes of data. Images were downloaded from the orbiting Shuttle to Johnson Space Center for analysis and processing. Results are shown to be comparable to ground-based thermal inspections performed in the laboratory with the same type of camera and simulated solar heating. The EVA camera system detected flat-bottom holes as small as 2.54cm in diameter with 50% material loss from the back (hidden) surface in RCC during this first test of the EVA IR Camera. Data for the time history of the specimen temperature and the capability of the inspection system for imaging impact damage are presented.

  8. Kepler's Constant and WDS Orbit

    CERN Document Server

    Siregar, S

    2012-01-01

    The aim of this work are to find a Kepler's constant by using polynomial regression of the angular separation \\rho = \\rho(t) and the position angle \\theta = \\theta(t). The Kepler's constant obtained is used to derive the element of orbit. As a case study the angular separation and the position angle of the WDS 00063 +5826 and the WDS 04403-5857 were investigated. For calculating the element of orbit the Thiele-Innes van den Bos method is used. The rough data of the angular separation \\rho(t) and the position angle \\theta(t) are taken from the US Naval Observatory, Washington. This work also presents the masses and absolute bolometric magnitudes of each star.These stars include into the main-sequence stars with the spectral class G5V for WDS04403-5857and the type of spectrum G3V for WDS 00063+5826. The life time of the primary star and the secondary star of WDS 04403-5857 nearly equal to 20 Gyr. The life time of the primary star and the secondary star of WDS 00063+5826 are 20 Gyr and 19 Gyr, respectively.

  9. Fungal infections of the orbit

    Directory of Open Access Journals (Sweden)

    Bipasha Mukherjee

    2016-01-01

    Full Text Available Fungal infections of the orbit can lead to grave complications. Although the primary site of inoculation of the infective organism is frequently the sinuses, the patients can initially present to the ophthalmologist with ocular signs and symptoms. Due to its varied and nonspecific clinical features, especially in the early stages, patients are frequently misdiagnosed and even treated with steroids which worsen the situation leading to dire consequences. Ophthalmologists should be familiar with the clinical spectrum of disease and the variable presentation of this infection, as early diagnosis and rapid institution of appropriate therapy are crucial elements in the management of this invasive sino-orbital infection. In this review, relevant clinical, microbiological, and imaging findings are discussed along with the current consensus on local and systemic management. We review the recent literature and provide a comprehensive analysis. In the immunocompromised, as well as in healthy patients, a high index of suspicion must be maintained as delay in diagnosis of fungal pathology may lead to disfiguring morbidity or even mortality. Obtaining adequate diagnostic material for pathological and microbiological examination is critical. Newer methods of therapy, particularly oral voriconazole and topical amphotericin B, may be beneficial in selected patients.

  10. Introducing the Moon's Orbital Eccentricity

    Science.gov (United States)

    Oostra, Benjamin

    2014-11-01

    I present a novel way to introduce the lunar orbital eccentricity in introductory astronomy courses. The Moon is perhaps the clearest illustration of the general orbital elements such as inclination, ascending node, eccentricity, perigee, and so on. Furthermore, I like the students to discover astronomical phenomena for themselves, by means of a guided exercise, rather than just telling them the facts.1 The inclination and nodes may be found by direct observation, monitoring carefully the position of the Moon among the stars. Even the regression of the nodes may be discovered in this way2 To find the eccentricity from students' observations is also possible,3 but that requires considerable time and effort. if a whole class should discover it in a short time, here is a method more suitable for a one-day class or home assignment. The level I aim at is, more or less, advanced high school or first-year college students. I assume them to be acquainted with celestial coordinates and the lunar phases, and to be able to use algebra and trigonometry.

  11. The earth orbiting space debris

    Directory of Open Access Journals (Sweden)

    Rossi A.

    2005-01-01

    Full Text Available The space debris population is similar to the asteroid belt, since it is subject to a process of high-velocity mutual collisions that affects the long-term evolution of its size distribution. Presently, more than 10 000 artificial debris particles with diameters larger than 10 cm (and more than 300 000 with diameters larger than 1 cm are orbiting the Earth, and are monitored and studied by a large network of sensors around the Earth. Many objects of different kind compose the space debris population, produced by different source mechanisms ranging from high energy fragmentation of large spacecraft to slow diffusion of liquid metal. The impact against a space debris is a serious risk that every spacecraft must face now and it can be evaluated with ad-hoc algorithms. The long term evolution of the whole debris population is studied with computer models allowing the simulation of all the known source and sink mechanisms. One of these codes is described in this paper and the evolution of the debris environment over the next 100 years, under different traffic scenarios, is shown, pointing out the possible measures to mitigate the growth of the orbital debris population. .

  12. Orbital variations, climate and paleoecology.

    Science.gov (United States)

    Bartlein, P J; Prentice, I C

    1989-07-01

    One of the most exciting discoveries in the earth sciences in recent decades has been the proof that ice ages are governed by deterministic variations in the earth's orbit. These variations modify the latitudinal and seasonal distribution of solar radiation at periods ranging from 103 to 10(5) years, and alternately produce conditions for building and melting continental ice. The same solar radiation variations also govern other aspects of world climate, including the temperatures of the midlatitude continental interiors, the intensity of upwelling in the tropical oceans, and the strength and extent of the monsoons. The interplay of solar radiation, seasonality and ice-sheet changes is responsible for the complex ecological history documented in the fossil record of the past 20 000 years. But the orbital variations have occurred throughout earth's history, and have caused periodic environmental changes in both terrestrial and marine environments even during times when there was no ice. Species have responded to these changes by range migration, an evolved ability that may maintain their genetic coherence in the face of a continually changing environment.

  13. LROC - Lunar Reconnaissance Orbiter Camera

    Science.gov (United States)

    Robinson, M. S.; Eliason, E.; Hiesinger, H.; Jolliff, B. L.; McEwen, A.; Malin, M. C.; Ravine, M. A.; Thomas, P. C.; Turtle, E. P.

    2009-12-01

    The Lunar Reconnaissance Orbiter (LRO) went into lunar orbit on 23 June 2009. The LRO Camera (LROC) acquired its first lunar images on June 30 and commenced full scale testing and commissioning on July 10. The LROC consists of two narrow-angle cameras (NACs) that provide 0.5 m scale panchromatic images over a combined 5 km swath, and a wide-angle camera (WAC) to provide images at a scale of 100 m per pixel in five visible wavelength bands (415, 566, 604, 643, and 689 nm) and 400 m per pixel in two ultraviolet bands (321 nm and 360 nm) from the nominal 50 km orbit. Early operations were designed to test the performance of the cameras under all nominal operating conditions and provided a baseline for future calibrations. Test sequences included off-nadir slews to image stars and the Earth, 90° yaw sequences to collect flat field calibration data, night imaging for background characterization, and systematic mapping to test performance. LRO initially was placed into a terminator orbit resulting in images acquired under low signal conditions. Over the next three months the incidence angle at the spacecraft’s equator crossing gradually decreased towards high noon, providing a range of illumination conditions. Several hundred south polar images were collected in support of impact site selection for the LCROSS mission; details can be seen in many of the shadows. Commissioning phase images not only proved the instruments’ overall performance was nominal, but also that many geologic features of the lunar surface are well preserved at the meter-scale. Of particular note is the variety of impact-induced morphologies preserved in a near pristine state in and around kilometer-scale and larger young Copernican age impact craters that include: abundant evidence of impact melt of a variety of rheological properties, including coherent flows with surface textures and planimetric properties reflecting supersolidus (e.g., liquid melt) emplacement, blocks delicately perched on

  14. LLOFX earth orbit to lunar orbit delta V estimation program user and technical documentation

    Science.gov (United States)

    1988-01-01

    The LLOFX computer program calculates in-plane trajectories from an Earth-orbiting space station to Lunar orbit in such a way that the journey requires only two delta V burns (one to leave Earth circular orbit and one to circularize into Lunar orbit). The program requires the user to supply the Space Station altitude and Lunar orbit altitude (in km above the surface), and the desired time of flight for the transfer (in hours). It then determines and displays the trans-Lunar injection (TLI) delta V required to achieve the transfer, the Lunar orbit insertion (LOI) delta V required to circularize the orbit around the Moon, the actual time of flight, and whether the transfer orbit is elliptical or hyperbolic. Return information is also displayed. Finally, a plot of the transfer orbit is displayed.

  15. Analytical representations of precise orbit predictions for Earth orbiting space objects

    Science.gov (United States)

    Sang, Jizhang; Li, Bin; Chen, Junyu; Zhang, Pin; Ning, Jinsheng

    2017-01-01

    Accurate orbits of Earth orbiting space objects are usually generated from an orbit determination/prediction process using numerical integrators, and presented to users in a tabulated form or a state vector including force model parameters. When dealing with hundreds of thousands of space objects such as in the space conjunction assessment, the memory required for the tabulated orbits or the computing time for propagating orbits using the state vector are both confronting to users. This paper presents two methods of analytically representing numerical orbits considering the accuracy, computing efficiency and memory. The first one is a two-step TLE-based method in which the numerical orbits are first fitted into a TLE set and then correction functions are applied to improve the position accuracy. In the second method, the orbit states are represented in equinoctial elements first, and then again correction functions are applied to reduce the position errors. Experiments using six satellite laser ranging (SLR) satellites and 12 debris objects with accurate orbits show that both methods can represent the accurate orbits over 5 days in an accuracy of a few dozens of meters for the circular orbits and several hundred meters for the eccentric orbits. The computing time is similar to that using the NORAD TLE/SGP4 algorithm, and storage for the orbit elements and function coefficients is about 3-5 KB. These features could make the two methods beneficial for the maintenance of orbit catalog of large numbers of space objects.

  16. Homoclinic Bifurcation of Orbit Flip with Resonant Principal Eigenvalues

    Institute of Scientific and Technical Information of China (English)

    Tian Si ZHANG; De Ming ZHU

    2006-01-01

    Codimension-3 bifurcations of an orbit-flip homoclinic orbit with resonant principal eigenvalues are studied for a four-dimensional system. The existence, number, co-existence and non-coexistence of 1-homoclinic orbit, 1-periodic orbit, 2n-homoclinic orbit and 2n-periodic orbit are obtained. The bifurcation surfaces and existence regions are also given.

  17. Degenerate Orbit Flip Homoclinic Bifurcations with Higher Dimensions

    Institute of Scientific and Technical Information of China (English)

    Ran Chao WU; Jian Hua SUN

    2006-01-01

    Bifurcations of a degenerate homoclinic orbit with orbit flip in high dimensional system are existence and uniqueness of 1-homoclinic orbit and 1-periodic orbit are given. Also considered is the existence of 2-homoclinic orbit and 2-periodic orbit. In additon, the corresponding bifurcation surfaces are given.

  18. Hematoma subperiosteal de órbita: relato de caso Subperiosteal hematoma of the orbit: case report

    Directory of Open Access Journals (Sweden)

    Jacinto Barbosa Lay Chaves

    2007-08-01

    Full Text Available Descrevemos um paciente de 16 anos que após traumatismo crânio-encefálico leve evoluiu com dor ocular, hematoma palpebral unilateral e proptose do olho esquerdo. Tomografia computadorizada de órbitas evidenciou hematoma subperiosteal em órbita esquerda. Foi realizada drenagem cirúrgica da coleção. O hematoma subperiosteal de órbita, apesar de raro, deve ser incluído como etiologia de proptose ocular e seu diagnóstico deve ser precoce a fim de evitar a morbidade associada.We describe a sixteen years old male patient that suffered a craniocerebral trauma and presented at the emergency room, with ocular pain, palpebral hematoma and left eye proptosis. Orbital computed tomography showed left subperiosteal orbital hematoma. A surgical drainage was performed. Subperiosteal hematoma of the orbit is a rare cause of proptosis; its early diagnosis must be made in order to avoid possible complications.

  19. Sensoriamento remoto e geoprocessamento aplicados ao uso da terra em microbacias hidrográficas, Botucatu - SP Remote sensing and gis applied to study the land use in watersheds in Botucatu, Brazil

    Directory of Open Access Journals (Sweden)

    Sérgio Campos

    2004-08-01

    Full Text Available O presente trabalho teve como objetivo identificar e quantificar o uso da terra em dez microbacias ocorrentes na bacia do Rio Capivara, município de Botucatu - SP, a partir da estruturação de um banco de dados utilizando o Sistema de Informações Geográficas (SIG - IDRISI. Os resultados mostram que as classes de uso da terra, "uso agrícola" e "pastagem", foram as mais significativas, pois ocuparam mais da metade da área das microbacias. O alto índice de uso da terra por pastagens, capoeiras, reflorestamento e matas reflete a predominância de solos arenosos com baixa fertilidade. As imagens obtidas do satélite LANDSAT 5 permitiram o mapeamento do uso da terra de maneira rápida, além de fornecer um excelente banco de dados para futuro planejamento e gerenciamento das atividades agropecuárias regionais. O SIG-IDRISI permitiu identificar, por meio de seus diferentes módulos para georreferenciamento, classificação digital e modelo matemático, as classes de uso da terra com rapidez.This study aimed to identify and quantify the land use in ten watersheds in the Capivara river-basin, in the municipality of Botucatu - SP, Brazil. A database was made using the Geographical Information System - IDRISI. The results showed that the classes of agriculture and pasture were the most significant land use, as they occupied more than half of the area of the watersheds. The high index of land use by pasture, brushwood, reforestation and forests, reflected the predominance of sandy soils with low fertility. The images of the satellite LANDSAT-5 allowed the mapping of the land use in a fast and reliable way. In addition they supplied an excellent database for future planning and management of the regional agricultural activities. GIS - IDRISI allowed the identification, digital classification and mathematical modeling of several areas of land use.

  20. Cambios de los receptores de benzodiazepinas en la sustancia negra como consecuencia de lesión del territorio de la arteria cerebral media en un modelo experimental de isquemia con reperfusión en ratas

    Directory of Open Access Journals (Sweden)

    Hernán J. Pimienta J.

    2005-03-01

    Full Text Available Se han demostrado cambios remotos o exofocales en la sustancia negra, en modelos experimentales de isquemia focal, con compromiso de la corteza cerebral y el estriado dorsolateral.  Se ha propuesto que estos cambios obedecen al desbalance entre las actividades excitatorias e inhibitoria.

  1. Continuation of Sets of Constrained Orbit Segments

    DEFF Research Database (Denmark)

    Schilder, Frank; Brøns, Morten; Chamoun, George Chaouki

    Sets of constrained orbit segments of time continuous flows are collections of trajectories that represent a whole or parts of an invariant set. A non-trivial but simple example is a homoclinic orbit. A typical representation of this set consists of an equilibrium point of the flow and a trajecto...... orbit segments, this is very disadvantageous in practice. In this talk we will present an algorithm that allows the efficient continuation of sets of constrained orbit segments together with the solution of the full variational problem.......Sets of constrained orbit segments of time continuous flows are collections of trajectories that represent a whole or parts of an invariant set. A non-trivial but simple example is a homoclinic orbit. A typical representation of this set consists of an equilibrium point of the flow and a trajectory...

  2. Orbital behavior around a nonuniform celestial body

    Science.gov (United States)

    Rosson, Z.; Hall, F.; Vogel, T.

    2016-09-01

    To effectively model the orbit around a nonuniform celestial body, detailed information needs to be determined of the perturbations. This research looked at one of the most crucial perturbations: the nonuniform gravitational field of a celestial body. Given an orbiting particle (a satellite), we utilized numerical methods to calculate its orbit in two dimensions around a discretized center mass structure. The gravitational acceleration imposed on the particle due to each mass point sums vectorally as the particle completes each infinitesimal time step of one orbit. There are noticeable effects on the orbit as the conditions of the center mass change. The development of a simulation code allows for the modelling of the orbit about an irregular body with satisfactory accuracy.

  3. Electronic structure interpolation via atomic orbitals.

    Science.gov (United States)

    Chen, Mohan; Guo, G-C; He, Lixin

    2011-08-17

    We present an efficient scheme for accurate electronic structure interpolation based on systematically improvable optimized atomic orbitals. The atomic orbitals are generated by minimizing the spillage value between the atomic basis calculations and the converged plane wave basis calculations on some coarse k-point grid. They are then used to calculate the band structure of the full Brillouin zone using the linear combination of atomic orbitals algorithms. We find that usually 16-25 orbitals per atom can give an accuracy of about 10 meV compared to the full ab initio calculations, and the accuracy can be systematically improved by using more atomic orbitals. The scheme is easy to implement and robust, and works equally well for metallic systems and systems with complicated band structures. Furthermore, the atomic orbitals have much better transferability than Shirley's basis and Wannier functions, which is very useful for perturbation calculations.

  4. On Orbital Period Changes in Nova Outbursts

    CERN Document Server

    Martin, Rebecca G; Schaefer, Bradley E

    2011-01-01

    We propose a new mechanism that produces an orbital period change during a nova outburst. When the ejected material carries away the specific angular momentum of the white dwarf, the orbital period increases. A magnetic field on the surface of the secondary star forces a fraction of the ejected material to corotate with the star, and hence the binary system. The ejected material thus takes angular momentum from the binary orbit and the orbital period decreases. We show that for sufficiently strong magnetic fields on the surface of the secondary star, the total change to the orbital period could even be negative during a nova outburst, contrary to previous expectations. Accurate determinations of pre- and post-outburst orbital periods of recurrent nova systems could test the new mechanism, in addition to providing meaningful constraints on otherwise difficult to measure physical quantities. We apply our mechanism to outbursts of the recurrent nova U Sco.

  5. como proyecto lingüístico

    Directory of Open Access Journals (Sweden)

    Ana María Rivas Rivas

    2005-01-01

    Full Text Available Este artículo tiene como objetivo analizar las estructuras discursivas, cognitivas y de representación de algunos de los sectores más desfavorecidos del mercado laboral español y su relación con los modelos interpretativos de la realidad generados y difundidos por el pensamiento economicista neoliberal. Se trata de estudiar los mecanismos por medio de los cuales estos modelos dominantes de la realidad son incorporados por los propios trabajadores y trabajadoras para definir y comprender su situación y para determinar la propia capacidad y posibilidad de modificarla.

  6. La sutileza como germen educacional copernicano

    OpenAIRE

    Calvo Muñoz, Carlos

    2011-01-01

    Por siglos hemos vivido convenciéndonos que la escuela es importante y que su innegable valor social se acrecienta con el tiempo.  Hoy, se nos informa con cifras tan dramáticas como elocuentes, que el desertor del sistema escolar está condenado a vivir la peor de las pobrezas y a depender de trabajos precarios y mal remunerados. A los profesores se les recomienda con vigor evitar que sus alumnos deserten y que permanezcan más tiempo en el escuela; incluso se le ofrecen becas para que no salga...

  7. La ciencia como base del conocimiento

    OpenAIRE

    Thompson, Héctor

    2006-01-01

    La ciencia ha seguido un camino de posible descripción histórica hasta tener la relevancia actual. Surge la pregunta ¿es posible pensar en caminos diferentes para llegar al conocimiento? Desde los griegos, pasando por el renacimiento y el positivismo lógico, se buscó lograr un conocimiento totalizador. A comienzos del siglo XX ocurre una revolución dentro de la ciencia (percibida por algunos, como el comienzo de la revolución permanente). A partir de ese momento se manifiesta cierto desorden ...

  8. La indiferencia como instrumento de poder

    Directory of Open Access Journals (Sweden)

    Sergio Carlos Staude

    2014-10-01

    Full Text Available La indiferencia como respuestaante las situaciones de horror queprovoca la guerra llega a adquirirdiferentes funciones. Puede ser unindicador del resguardo necesariopara tramitar lo traumático de losacontecimientos, también un modode desmentir la responsabilidad deestos o bien ser un instrumentosiniestro de poder destinado agarantizar la eficacia de quienesejercen la violencia, neutralizar lasrespuestas del medio social y marginarlas reacciones posibles de lasvíctimas. Se destacan los recursosque aportan el psicoanálisis, lacreación ficcional del arte y, en particular,los esfuerzos de legitimaciónde la justicia para paliar los efectosiatrogénicos de la indiferencia.

  9. O cubismo como método

    OpenAIRE

    Gonçalves,Rosa Gabriella

    2017-01-01

    Este artigo busca discutir a relevância do Cubismo para a concepção de Modernismo elaborada pelo crítico de arte norte-americano Clement Greenberg a partir da análise de ensaios e textos críticos publicados por ele ao longo de mais de três décadas, nos quais transparece a identificação da unidade do plano pictórico – entendida pelo crítico como uma das características mais essenciais da pintura moderna, ao lado da planaridade – com o pensamento plástico cubista.

  10. I jornadas el cuerpo como medida

    OpenAIRE

    Abad Tejerina, María Jesús; Sardá, Raquel

    2016-01-01

    Exposición creada con motivo de las "I jornadas el cuerpo como medida" 18 y 19 de Febrero de 2016 Sala de palmeras URJC, Fuenlabrada ISBN: 978-84-608-1694-2 (Jornadas) ISBN: 978-84-608-4651-2 (Catálogo) Decía Protágoras que el hombre es la medida de todas las cosas. Y, con ese aparentemente sencillo pensamiento, el sofista griego inauguró dos corrientes diferentes: aquellos que interpretaban que el hombre se refería a cada individuo y, por tanto, todo respondía a...

  11. Daimien Hirst : el artista como preparador

    OpenAIRE

    Verena Fakiner, Nike

    2006-01-01

    El cuerpo más allá de su razón biológica, es un espacio de proyección donde se escenifican las normas y los valores socioculturales y científicos. La ciencia médica constituye un régimen escópico, en cuyo marco se construye un imaginario acerca del cuerpo, que modela y normaliza la percepción que el sujeto moderno establece con él. Hirst trabaja desde el cuerpo muerto, como medio y material de trabajo, para cuestionar el posicionamiento del cuerpo en el discur...

  12. Justicia juvenil restaurativa como respuesta alternativa

    OpenAIRE

    Mariño Rojas, Cielo

    2016-01-01

    El artículo explora las posibilidades de la justicia juvenil restaurativa como respuesta alternativa en los sistemas de justicia juvenil en la región. Si bien la justicia restaurativa no aparece explícitamente en los instrumentos internacionales sobre justicia penal juvenil, estos dan la oportunidad para que aquella se desarrolle dentro de los sistemas de justicia juvenil. Inicialmente se aborda su evolución histórica para establecer el origen de sus principales características. A continuació...

  13. OS DIREITOS DOS TRABALHADORES COMO DIREITOS FUNDAMENTAIS

    OpenAIRE

    Vecchi, Ipojucan Demétrius

    2012-01-01

    O objetivo do presente texto é tentar responder, sumariamente diante das limitações próprias de um artigo, ao seguinte questionamento: quais as consequências do reconhecimento dos direitos dos trabalhadores como direitos fundamentais albergados pela Constituição Federal Brasileira de 1988? No momento em que a Ordem Constitucional de um Estado Democrático de Direito, fundado na dignidade humana e no valor social do trabalho, entre outros princípios fundamentais, eleva ao patamar de direitos fu...

  14. La entrevista como encuentro de subjetividades

    OpenAIRE

    Emma Ruiz Martín del Campo

    2003-01-01

    Se parte de la comprensión de la subjetividad como la expresión preñada de cultura de cada ser humano que se gesta en las relaciones interpersonales, primero entre el infante y las personas que le prodigan los cuidados tempranos, y después en la adolescencia y la edad adulta, con cada vez más representantes de la cultura de la socialización. En dicha interacción, la persona aprende a convivir con otros y a modelar sus impulsos, lo que le permite encontrar las formas más satisfactoria...

  15. La entrevista como encuentro de subjetividades

    OpenAIRE

    Emma Ruiz Martín del Campo

    2003-01-01

    Se parte de la comprensión de la subjetividad como la expresión preñada de cultura de cada ser humano que se gesta en las relaciones interpersonales, primero entre el infante y las personas que le prodigan los cuidados tempranos, y después en la adolescencia y la edad adulta, con cada vez más representantes de la cultura de la socialización. En dicha interacción, la persona aprende a convivir con otros y a modelar sus impulsos, lo que le permite encontrar las formas más satisfactorias posible...

  16. La inteligencia emocional como estrategia educativa inclusiva

    OpenAIRE

    Fernández Rodicio, Clara Isabel

    2011-01-01

    La educación inclusiva es, sin duda, uno de los temas estrellas que ocupa las agendas de la política educativa. Temas como la atención a la diversidad, la intervención social, conlleva a que le sistema educativo defina las estrategias para el desarrollo integral de la persona, desde la concepción de la integración que implique la intervención fundamental de la familia, la escuela, la comunidad y las instituciones en general. En este contexto educativo, adquiere una especial signif...

  17. La entrevista como encuentro de subjetividades

    Directory of Open Access Journals (Sweden)

    Emma Ruiz Martín del Campo

    2003-01-01

    Full Text Available Se parte de la comprensión de la subjetividad como la expresión preñada de cultura de cada ser humano que se gesta en las relaciones interpersonales, primero entre el infante y las personas que le prodigan los cuidados tempranos, y después en la adolescencia y la edad adulta, con cada vez más representantes de la cultura de la socialización. En dicha interacción, la persona aprende a convivir con otros y a modelar sus impulsos, lo que le permite encontrar las formas más satisfactorias posibles de experimentarse a sí misma y tomar parte en las actividades de su entorno social. El equilibrio entre el individuo que busca satisfacer sus impulsos y necesidades y la cultura a la que pertenece es dinámico, por lo que la subjetividad se transforma a lo largo de toda la vida. Tras abundar sobre la subjetividad, se describen dos formas de orientar la entrevista a profundidad: la psicoanalítica y la etnopsicoanalítica. La entrevista psicoanalítica explora la subjetividad como tal y en ella el entrevistador actúa como un acompañante del sujeto en la progresiva comprensión de sí mismo y de su historia individual, desentrañando significados del comportamiento hasta entonces inconscientes para sí mismo, que se clarifican en la interacción. La entrevista etnopiscoanalítica busca explorar la experiencia cultural de las personas. Expertos en ciencias sociales entrenados a la vez en el descubrimiento del inconsciente se involucran en un medio cultural nuevo para ellos y a través de entrevistas y conversaciones con los integrantes de la comunidad que visitan van descubriendo formas de participación de estos en los espacios de vida social, así como las maneras que dan cuenta de símbolos y modos de reacción propios de su cultura. Cada una de estas dos formas de entrevista es ilustrada con un ejemplo que da muestra plásticamente del encuentro de las subjetividades

  18. La fatiga como estado motivacional subjetivo

    Directory of Open Access Journals (Sweden)

    D. Cárdenas

    2017-03-01

    No obstante, la tendencia actual es entender la fatiga como un estado motivacional complejo cuyo origen tiene lugar en numerosos procesos fisiológicos y psicológicos que sirven para regular el esfuerzo y proteger al organismo de daños graves. Los objetivos de la presente revisión narrativa son analizar los diferentes enfoques existentes para el estudio y la explicación de la fatiga, establecer el vínculo con el concepto de carga de entrenamiento y justificar la importancia de evaluar las repercusiones de la carga mental para conseguir una adecuada planificación y control del proceso de entrenamiento.

  19. High Precision Orbit Determination of CHAMP Satellite

    Institute of Scientific and Technical Information of China (English)

    ZHAO Qile; LIU Jingnan; GE Maorong

    2006-01-01

    The precision orbit determination of challenging minisatellite payload(CHAMP) satellite was done based on position and navigation data analyst(PANDA) software which is developed in Wuhan University, using the onboard GPS data of year 2002 from day 126 to 131. The orbit accuracy was assessed by analyzing the difference from GFZ post-processed science orbits (PSO), the GPS carrier and pseudo-range data residuals and the satellite laser ranging (SLR) residuals.

  20. Wavefunction Intensity Statistics from Unstable Periodic Orbits

    CERN Document Server

    Kaplan, L

    1998-01-01

    We examine the effect of short unstable periodic orbits on wavefunction statistics in a classically chaotic system, and find that the tail of the wavefunction intensity distribution in phase space is dominated by scarring associated with the least unstable periodic orbits. In an ensemble average over systems with classical orbits of different instabilities, a power law tail is found, in sharp contrast to the exponential prediction of random matrix theory. The calculations are compared with numerical data and quantitative agreement is obtained

  1. Mercury's resonant rotation from secular orbital elements

    OpenAIRE

    Stark, Alexander; Oberst, Jürgen; Hussmann, Hauke

    2015-01-01

    We used recently produced Solar System ephemerides, which incorporate 2 years of ranging observations to the MESSENGER spacecraft, to extract the secular orbital elements for Mercury and associated uncertainties. As Mercury is in a stable 3:2 spin-orbit resonance, these values constitute an important reference for the planet’s measured rotational parameters, which in turn strongly bear on physical interpretation of Mercury’s interior structure. In particular, we derive a mean orbital period o...

  2. Langerhans cell histiocytosis of the orbit.

    Directory of Open Access Journals (Sweden)

    Shetty S

    2001-01-01

    Full Text Available Langerhans cell histiocytosis (LCH accounts for less than 1% of all orbital tumours. Though rare, orbital involvement in LCH is not uncommon. Most reports so far have been in Western literature. We report here a case of LCH of orbit with intracranial extension. To the best of our knowledge, this is the first case of single system multifocal LCH reported from India.

  3. The Atomic orbitals of the topological atom

    OpenAIRE

    Ramos-Cordoba, Eloy; Salvador Sedano, Pedro

    2013-01-01

    The effective atomic orbitals have been realized in the framework of Bader's atoms in molecules theory for a general wavefunction. This formalism can be used to retrieve from any type of calculation a proper set of orthonormalized numerical atomic orbitals, with occupation numbers that sum up to the respective Quantum Theory of Atoms in Molecules (QTAIM) atomic populations. Experience shows that only a limited number of effective atomic orbitals exhibit significant occupation numbers. These c...

  4. Growth and development of the orbit.

    Science.gov (United States)

    Berger, Aaron J; Kahn, David

    2012-11-01

    Every surgeon operating on the face, and particularly around the eye, should possess a working knowledge of the critical details related to development of the human orbit and recognized changes that occur during the course of aging. The anatomy of the orbit and periorbital region is complex, and the diagnosis and treatment of patients with orbital/periorbital disease requires expertise in congenital differences and awareness of the changes that occur as individuals age.

  5. Semiclassical quantization with short periodic orbits

    CERN Document Server

    Vergini, E G; Vergini, Eduardo G.; Carlo, Gabriel

    2000-01-01

    We apply a recently developed semiclassical theory of short peridic orbits to the stadium billiard. We give explicit expresions for the resonances of periodic orbits and for the application of the semiclassical Hamiltonian operator to them. Then, by using the 3 shortest periodic orbits and 2 more living in the bouncing ball region, we obtain the first 25 odd-odd eigenfunctions with surprising accuracy.

  6. Orbit stability in billiards in magnetic field

    CERN Document Server

    Kovács, Z

    1997-01-01

    We study the stability properties of orbits in dispersing billiards in a homogeneous magnetic field by using a modified formalism based on the Bunimovich-Sinai curvature (horocycle method). We identify simple periodic orbits that can be stabilized by the magnetic field in the four-disk model and the square-lattice Lorentz gas. The stable orbits can play a key role in determining the transport properties of these models.

  7. Orbit IMU alignment: Error analysis

    Science.gov (United States)

    Corson, R. W.

    1980-01-01

    A comprehensive accuracy analysis of orbit inertial measurement unit (IMU) alignments using the shuttle star trackers was completed and the results are presented. Monte Carlo techniques were used in a computer simulation of the IMU alignment hardware and software systems to: (1) determine the expected Space Transportation System 1 Flight (STS-1) manual mode IMU alignment accuracy; (2) investigate the accuracy of alignments in later shuttle flights when the automatic mode of star acquisition may be used; and (3) verify that an analytical model previously used for estimating the alignment error is a valid model. The analysis results do not differ significantly from expectations. The standard deviation in the IMU alignment error for STS-1 alignments was determined to the 68 arc seconds per axis. This corresponds to a 99.7% probability that the magnitude of the total alignment error is less than 258 arc seconds.

  8. The Orbital Workshop Shower Compartment

    Science.gov (United States)

    1972-01-01

    This photograph shows technicians performing a checkout of the Metabolic Analyzer (center background) and the Ergometer (foreground) in the Orbital Workshop (OWS). The shower compartment is at right. The Ergometer (Skylab Experiment M171) evaluated man's metabolic effectiveness and cost of work in space environment. Located in the experiment and work area of the OWS, the shower compartment was a cylindrical cloth enclosure that was folded flat when not in use. The bottom ring of the shower was fastened to the floor and contained foot restraints. The upper ring contained the shower head and hose. To use the shower, the astronaut filled a pressurized portable bottle with heated water and attached the bottle to the ceiling. A flexible hose cornected the water bottle to a handheld shower head. The astronaut pulled the cylindrical shower wall up into position and bathed, using liquid soap. Both soap and water were carefully rationed, having been premeasured for economical use.

  9. Airbreathing Acceleration Toward Earth Orbit

    Energy Technology Data Exchange (ETDEWEB)

    Whitehead, J C

    2007-05-09

    As flight speed increases, aerodynamic drag rises more sharply than the availability of atmospheric oxygen. The ratio of oxygen mass flux to dynamic pressure cannot be improved by changing altitude. The maximum possible speed for airbreathing propulsion is limited by the ratio of air capture area to vehicle drag area, approximately Mach 6 at equal areas. Simulation of vehicle acceleration shows that the use of atmospheric oxygen offers a significant potential for minimizing onboard consumables at low speeds. These fundamental calculations indicate that a practical airbreathing launch vehicle would accelerate to near steady-state speed while consuming only onboard fuel, then transition to rocket propulsion. It is suggested that an aircraft carrying a rocket-propelled vehicle to approximately Mach 5 could be a realistic technical goal toward improving access to orbit.

  10. Phonons with orbital angular momentum

    Energy Technology Data Exchange (ETDEWEB)

    Ayub, M. K. [Theoretical Plasma Physics Division, PINSTECH, P. O. Nilore, Islamabad (Pakistan); National Centre for Physics, Shahdra Valley Road, Quaid-i-Azam University Campus, Islamabad 44000 (Pakistan); Ali, S. [National Centre for Physics, Shahdra Valley Road, Quaid-i-Azam University Campus, Islamabad 44000 (Pakistan); Mendonca, J. T. [IPFN, Instituto Superior Tecnico, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal)

    2011-10-15

    Ion accoustic waves or phonon modes are studied with orbital angular momentum (OAM) in an unmagnetized collissionless uniform plasma, whose constituents are the Boltzmann electrons and inertial ions. For this purpose, we have employed the fluid equations to obtain a paraxial equation in terms of ion density perturbations and discussed its Gaussian beam and Laguerre-Gauss (LG) beam solutions. Furthermore, an approximate solution for the electrostatic potential problem is presented, allowing to express the components of the electric field in terms of LG potential perturbations. The energy flux due to phonons is also calculated and the corresponding OAM is derived. Numerically, it is shown that the parameters such as azimuthal angle, radial and angular mode numbers, and beam waist, strongly modify the profiles of the phonon LG potential. The present results should be helpful in understanding the phonon mode excitations produced by Brillouin backscattering of laser beams in a uniform plasma.

  11. The orbital TUS detector simulation

    Science.gov (United States)

    Grinyuk, A.; Grebenyuk, V.; Khrenov, B.; Klimov, P.; Lavrova, M.; Panasyuk, M.; Sharakin, S.; Shirokov, A.; Tkachenko, A.; Tkachev, L.; Yashin, I.

    2017-04-01

    The TUS space experiment is aimed at studying energy and arrival distribution of UHECR at E > 7 × 1019 eV by using the data of EAS fluorescent radiation in atmosphere. The TUS mission was launched at the end of April 2016 on board the dedicated ;Lomonosov; satellite. The TUSSIM software package has been developed to simulate performance of the TUS detector for the Fresnel mirror optical parameters, the light concentrator of the photo detector, the front end and trigger electronics. Trigger efficiency crucially depends on the background level which varies in a wide range: from 0.2 × 106 to 15 × 106 ph/(m2 μ s sr) at moonless and full moon nights respectively. The TUSSIM algorithms are described and the expected TUS statistics is presented for 5 years of data collection from the 500 km solar-synchronized orbit with allowance for the variability of the background light intensity during the space flight.

  12. Orbital cysticercosis: A case report

    Science.gov (United States)

    Damani, Mehul; Mehta, Vinod C.; Baile, Rahul B.; Nakwa, Bhalachandra

    2012-01-01

    A 22 years old male presented to us with a history of lid swelling and chemosis of conjunctiva since 2 days. The patient had a history of convulsions 4 days back and 2 months back. The patient had undergone a CT scan which showed granulomas in temporal and parietal lobes. The patient was started on Anti tuberculosis treatment by the Physician. The Patient underwent USG B scan which revealed cysticercosis cyst in the anterior orbit inferiorly .The patient was treated with albendazole and wysolone for a month. The patient was reviewed after 1 month .The lesion resolved with the treatment both clinically and on USG. PMID:23961034

  13. Mars Reconnaissance Orbiter Wrapper Script

    Science.gov (United States)

    Gladden, Roy; Fisher, Forest; Khanampornpan, Teerapat

    2008-01-01

    The MRO OLVM wrapper script software allows Mars Reconnaissance Orbiter (MRO) sequence and spacecraft engineers to rapidly simulate a spacecraft command product through a tool that simulates the onboard sequence management software (OLVM). This script parses sequence files to determine the appropriate time boundaries for the sequence, and constructs the script file to be executed by OLVM to span the entirety of the designated sequence. It then constructs script files to be executed by OLVM, constructs the appropriate file directories, populates these directories with needed input files, initiates OLVM to simulate the actual command product that will be sent to the spacecraft, and captures the results of the simulation run to an external file for later review. Additionally, the tool allows a user to manually construct the script, if desired, and then execute the script with a simple command line.

  14. Spin-orbit-coupled superconductivity.

    Science.gov (United States)

    Lo, Shun-Tsung; Lin, Shih-Wei; Wang, Yi-Ting; Lin, Sheng-Di; Liang, C-T

    2014-06-25

    Superconductivity and spin-orbit (SO) interaction have been two separate emerging fields until very recently that the correlation between them seemed to be observed. However, previous experiments concerning SO coupling are performed far beyond the superconducting state and thus a direct demonstration of how SO coupling affects superconductivity remains elusive. Here we investigate the SO coupling in the critical region of superconducting transition on Al nanofilms, in which the strength of disorder and spin relaxation by SO coupling are changed by varying the film thickness. At temperatures T sufficiently above the superconducting critical temperature T(c), clear signature of SO coupling reveals itself in showing a magneto-resistivity peak. When T superconductivity. By studying such magneto-resistivity peaks under different strength of spin relaxation, we highlight the important effects of SO interaction on superconductivity.

  15. Managing resonant trapped orbits in our Galaxy

    CERN Document Server

    Binney, James

    2016-01-01

    Galaxy modelling is greatly simplified by assuming the existence of a global system of angle-action coordinates. Unfortunately, global angle-action coordinates do not exist because some orbits become trapped by resonances, especially where the radial and vertical frequencies coincide. We show that in a realistic Galactic potential such trapping occurs only on thick-disc and halo orbits (speed relative to the guiding centre >~80 km/s). We explain how the Torus Mapper code (TM) behaves in regions of phase space in which orbits are resonantly trapped, and we extend TM so trapped orbits can be manipulated as easily as untrapped ones. The impact that the resonance has on the structure of velocity space depends on the weights assigned to trapped orbits. The impact is everywhere small if each trapped orbit is assigned the phase space density equal to the time average along the orbit of the DF for untrapped orbits. The impact could be significant with a different assignment of weights to trapped orbits.

  16. Impulsive orbit control for spacecraft around asteroid

    Institute of Scientific and Technical Information of China (English)

    崔祜涛; 崔平远; 栾恩杰

    2003-01-01

    An impulse feedback control law to change the mean orbit elements of spacecraft around asteroid is presented. First, the mean orbit elements are transferred to the osculating orbit elements at the burning time.Then, the feedback control law based on Gauss' s perturbation equations of motion is given. And the impulse control for targeting from the higher circulation orbit to the specified periapsis is developed. Finally, the numerical simulation is performed and the simulation results show that the presented impulse control law is effective.

  17. The fundamental group of the orbit space

    Directory of Open Access Journals (Sweden)

    Hattab Hawete

    2015-12-01

    Full Text Available Let G be a subgroup of the group Homeo(X of homeomorphisms of a topological space X. Let G¯$\\bar G$ be the closure of G in Homeo(X. The class of an orbit O of G is the union of all orbits having the same closure as O. We denote by X/G˜$X/\\widetildeG$ the space of classes of orbits called the orbit class space. In this paper, we study the fundamental group of the spaces X/G, X/G¯$X/\\bar G$ and X/G˜$X/\\widetildeG$

  18. Primary orbital neuroblastoma in a neonate

    Directory of Open Access Journals (Sweden)

    Mirzai Hasan

    2006-01-01

    Full Text Available Neuroblastoma is an undifferentiated malignant tumor of the primitive neuroblasts. Orbital neuroblastoma is typically a metastatic tumor. We describe a two-days-old girl, who presented with a large tumor in her left orbit. Magnetic resonance imaging revealed that the tumor originated from the retrobulbar area, extending into the upper and lateral orbit. She was operated on the fifth day of life. A histopathologic diagnosis of neuroblastoma was made. Medical evaluation including chest roentgenogram, ultrasonography of the abdomen, whole body computerized tomogram and bone scintigraphy showed no evidence of systemic involvement or metastasis. Neuroblastoma should be considered in the differential diagnosis of neonatal orbital tumors.

  19. Sun-synchronous satellite orbit determination

    Science.gov (United States)

    Ma, Der-Ming; Zhai, Shen-You

    2004-02-01

    The linearized dynamic equations used for on-board orbit determination of Sun-synchronous satellite are derived. Sun-synchronous orbits are orbits with the secular rate of the right ascension of the ascending node equal to the right ascension rate of the mean sun. Therefore the orbit is no more a closed circle but a tight helix about the Earth. In the paper, instead of treating the orbit as a closed circle, the actual helix orbit is taken as nominal trajectory. The details of the linearized equations of motion for the satellite in the Sun-synchronous orbit are derived. The linearized equations are obtained by perturbing the Keplerian motion with the J2 correction and the effect of sun's attraction being neglected. Combined with the GPS navigation equations, the Kalman filter formulation is given. The particular application considered is the circular Sun-synchronous orbit with the altitude of 800 km and inclination of 98.6°. The numerical example simulated by MATLAB® shows that only the pseudo-range data used in the algorithm still gives acceptable results. Based on the simulation results, we can use the on-board GPS receivers' signal only as an alternative to determine the orbit of Sun-Synchronous satellite and therefore circumvents the need for extensive ground support.

  20. Frontal mucocele with an accompanying orbital abscess mimicking a fronto-orbital mucocele: case report

    Directory of Open Access Journals (Sweden)

    Akkuzu Guzin

    2006-04-01

    Full Text Available Abstract Background Mucoceles are slowly expanding cystic lesions with respiratory epithelium containing mucus most commonly affecting the frontal and ethmoidal sinuses. They are caused by obstruction of sinus ostium. Mucoceles exert pressure on the bony boundaries and due to the proximity to the brain and orbit extension to these areas are common. Case presentation A case of a frontal mucocele with an accompanying orbital abscess mimicking a fronto-orbital mucocele is reported. A 77 year old female patient suffering from left sided proptosis and pain around the left eye was admitted to our department. She had a history of left frontal sinus mucocele one year ago that was offered an osteoplastic frontal sinus surgery that the patient refused. Patient had limitation of eye movements. Fundoscopic examination revealed a minimal papilledema. Coronal computerized tomography and orbital magnetic resonance imaging showed a frontal mucocele with suspicious erosion of the orbital roof and a superiorly localized extraconal mass displacing the orbit lateroinferiorly. Frontal and orbital masses had similar intensities. Thus surgery was planned for a fronto-orbital mucocele. During surgery no defect was found on the orbital roof. Frontal mucocele and orbital cystic mass was removed separately. Pathological examination showed a frontal mucocele and an orbital abscess wall. Postoperatively eye movements returned to normal and papilledema resolved. Conclusion Fronto-orbital mucoceles are commonly encountered pathologies, but frontal mucocele with an orbital abscess is a rarely seen and should be kept in mind because their treatments differ.

  1. Evolução do processo de ocupação da soja de 2000 a 2006 em Campo Novo dos Parecis - Mato Grosso, através do sensoriamento remoto Evolução do processo de ocupação da soja de 2000 a 2006 em Campo Novo dos Parecis - Mato Grosso, através do sensoriamento remoto

    Directory of Open Access Journals (Sweden)

    Lunalva Moura Schwenk

    2008-12-01

    2006, apresentando também incremento na vegetação alterada e com remanescente. Este município já se encontrava consolidado pela soja em 2000, de forma que, praticamente não tinha mais pra onde expandir a soja. Parte deste incremento foi pela substituição das pastagens bovinas em área de cultivo da soja, parte pelo desmate da vegetação natural e também pela ocupação da terra indígena Utiariti que tem uma grande parcela de sua reserva localizada neste município. Em 2000, esta parte da reserva, encontrava-se preservada deste tipo de ocupação, obtendo apenas a cultura tradicional que era de 1,28% subindo para 6% em 2006 com a soja mecanizada. A parceria com os grandes produtores e os indígenas na incorporação desta economia mecanizada e altamente tecnificada, resulta no desmatamento e fragmentação do cerrado, com tendências a aumentar a cada ano, em áreas que antes eram refúgios e que proporcionava a preservação desta formação que rapidamente está desaparecendo do país. Assim como, o agravamento das desigualdades culturais e sociais já existentes entre os mesmos e as manifestações de prostituição e de doenças como a Aids, sífilis e também, das drogas. A ocupação produtiva da soja tem simplificado e fragmentado a cobertura vegetal natural com perdas na biodiversidade e de espécies de alto valor econômico, industrial e farmacêutico. Também, contribuído para os processos erosivos, perdas de solo e o assoreamento e mudança no regime hidrológico dos rios, assim como a contaminação tanto das águas quanto dos solos causados pelo uso dos agrotóxicos. 

  2. Guatemala como alternativa de desarrollo local

    Directory of Open Access Journals (Sweden)

    Rosa Elba Hernandez Cruz

    2015-01-01

    Full Text Available El área aledaña a la Reserva de la biósfera del Volcán Tacaná, en Chiapas México destaca por la producción de café, además de una alta diversidad de flora y fauna; sin embargo las comunidades rurales que habitan estos espacios están en constante búsqueda de alternativas productivas para mejorar sus medios de vida y cuidar el ambiente el cual está sufriendo deterioro. Ante esta situación se planteó como objetivo la integración de una red de fincas agroecoturísticas en los municipios de Cacahoatán, Tuxtla Chico, Unión Juárez en Chiapas, México y una comunidad en Guatemala. Para construir la propuesta se utilizó la metodología de modos de vida, se realizaron talleres participativos, recorridos en campo y se identificaron los productos turísticos. Se concluye, a partir del análisis de los modos de vida, que la región presenta características y oportunidades para desarrollar la red de agroecoturismo como una alternativa económica.

  3. El lenguaje como instrumento de poder

    Directory of Open Access Journals (Sweden)

    MARÍA TERESA SUÁREZ GONZÁLEZ

    2009-01-01

    Full Text Available La investigación denominada 'El lenguaje como instrumento de poder' planteó dos interrogantes que permitieron, por un lado, evidenciar ¿cuáles estrategias discursivas permiten analizar la relación entre lenguaje y poder en el discurso de la segunda posesión del presidente Álvaro Uribe Vélez y, por otro, analizar las implicaciones que tienen las mencionadas estrategias en la construcción de sentido. Lo anterior con el fin de mirar cómo se ejerce poder mediante las prácticas discursivas, dado que quien emite un discurso busca, ante todo, convencer y cambiar la mentalidad de los receptores, a través de la comunicación de creencias, actitudes, valores y un sinnúmero de saberes tomados de su entorno y de la cultura, por medio de estrategias discusivas que son empleadas de manera consciente, de acuerdo con el fin que se persiga. Teniendo en cuenta lo anterior, esta ponencia presenta los resultados obtenidos en la investigación, desarrollada en la Maestría en Lingüística de la UPTC, los cuales muestran el discurso como una interacción a través de la cual se evidencian marcas de poder y se construyen los acontecimientos y las identidades de los sujetos, mediante la comunicación.

  4. El manual como texto Schoolbook as text

    Directory of Open Access Journals (Sweden)

    Agustín Escolano Benito

    2012-12-01

    Full Text Available Este trabajo aborda la cuestión de la identidad del libro escolar como un género textual específico en el contexto de la manualística clásica y moderna, contextualizando los análisis en el marco de la cultura de la escuela tradicional y en la era de la revolución digital y bajo una perspectiva historiográfica y teórica. También plantea el nacimiento y primeros desarrollos de la manualística como campo intelectual y académico y sus contribuciones a la definición de la identidad del libro escolar.This paper discusses the question of identifying a coursebook as a specific text genre in the context of the classical and modern manualistics, situating the analysis within the traditional school culture and the digital revolution era, under a historical and theoretical perspective. It also covers the birth and initial development of manualistics as an intelectual and academic field and its contributions to the definition of the schoolbook identity.

  5. Bloque de tierra comprimida como material constructivo

    Directory of Open Access Journals (Sweden)

    Karen Tatiana Arteaga Medina

    2012-05-01

    Full Text Available La construcción con tierra es poco usada en la actualidad debido a la falta de difusión e investigación, y a que es relacionada con la pobreza; por ende, se desaprovechan muchas de sus ventajas, como la abundancia demateria prima, la localización, la disponibilidad, el reciclaje, la producción sin consumo de energía (calorífica, el bajo costo y la resistencia –con un adecuado estudio del material tierra, de la estructuración y del suelo de fundación–; otras de sus ventajas son el aislamiento térmico y acústico. Con el paso del tiempo se han mejorado las técnicas constructivas con tierra, realizando estabilizaciones e implementando el uso de maquinaria y herramienta mecánica para elaborar bloques de tierra comprimida, y así facilitar el trabajo y obtener mayor rendimiento. Este artículo presenta la tierra como material constructivo, las técnicas o sistemas constructivos, los bloques de tierra comprimida (BTC y algunos ensayos realizados a estos bloques.

  6. Vosotros pensaréis como yo...

    Directory of Open Access Journals (Sweden)

    Fernando Colina Pérez

    1986-01-01

    Full Text Available Vosotros pensaréis, como yo, que el asunto de la feminidad es vano, incluso cargante, y, sin embargo, convendréis, también conmigo, que no hay tema más personal, más superlativamente propio de uno mismo; hasta franquea la soledad. Vosotros pensaréis que desvarío si os propongo que atendáis al pensamiento para poder pensar de otra manera, pero eso intento convocandoos sobre lo femenino. Lo femenino no es retomado en su dimensión ética, anatómica, ni social, sino como una inquietud epistemológica. La ya clásica y manoseada apelación por el deseo de la mujer, deseo tal que parece dar cuenta de su esencia femenina, delata, más que una ignorancia sobre el objetivo de su apetencia o por la substancia de su querer, una galvanizante y más primitiva incertidumbre sobre el conocer. Husmear sobre la mujer es el núcleo del conocimiento, un recorrido que desde lo olfativo nos desborda en la lógica.

  7. Las enfermedades periodontales como infecciones bacterianas

    Directory of Open Access Journals (Sweden)

    A. Bascones Martínez

    Full Text Available Las infecciones periodontales son un conjunto de enfermedades localizadas en las encías y estructuras de soporte del diente. Están producidas por ciertas bacterias provenientes de la placa bacteriana. Estas bacterias son esenciales para el inicio de la enfermedad, pero existen factores predisponentes del hospedador y microbianos que influyen en la patogénesis de la enfermedad. La microbiota bacteriana periodontopatógena es necesaria pero no suficiente para que exista enfermedad, siendo necesaria la presencia de un hospedador susceptible. Estas enfermedades se han clasificado en gingivitis, limitadas a las encías y periodontitis, extendidas a tejidos más profundos. La clasificación de las enfermedades periodontales ha ido variando a lo largo de los años y es en el International Workshop for a Clasification of Periodontal Diseases and Conditions, en 1999, cuando se aprueba la clasificación que se expone en este trabajo. En él, se hace una revisión global de los diferentes cuadros de las enfermedades periodontales. Posteriormente, se propone el empleo de antibioterapia de utilización sistémica como la amoxicilina, amoxicilina-clavulánico y metronidazol como primera opción de tratamiento coadyuvante de estas enfermedades.

  8. Marañón como modelo

    Directory of Open Access Journals (Sweden)

    Gracia, Diego

    2013-02-01

    Full Text Available As a result of his consistent attitude as citizen and doctor and his “liberal spirit”, Marañón has gone down in the history of the twentieth century as an archetype. Marañón was, above all, a moralist in the Kantian sense, an autonomous person not governed by external criteria but by duty; a thinker convinced of the transforming role of the positive sciences, towards a happier and more just society through a deep intellectual reform. Marañón, like Fernando de los Rios, integrated Kraussism, neo-Kantianism and socialism and from this ideological platform sought the necessary moral change in the Spanish people.Marañón ha pasado a la historia del siglo XX como arquetipo, debido a su actitud coherente y a su “talante liberal”. Marañón fue, sobre todo, un moralista en el sentido kantiano. Una persona autónoma que no se rigió por criterios externos, sino por deber; un convencido del papel transformador de las ciencias positivas en pos de una sociedad más feliz y más justa gracias a una profunda reforma intelectual. Marañón, como Fernando de los Ríos, integró krausismo, neokantismo y socialismo y desde esa plataforma ideológica, propugnó el necesario cambio moral del pueblo español.

  9. Quitina y carboximetilquitosana como agentes desintegrantes

    Directory of Open Access Journals (Sweden)

    Sol A Fernández Monagas

    1998-08-01

    Full Text Available Se realizó un estudio comparativo de la quitina y la carboximetilquitosana como agentes desintegrantes, y se evaluó la influencia ejercida por el método empleado en la elaboración de las tabletas sobre la actividad desintegrante de ambos polímeros. La quitina presentó buenas características como agente desintegrante independientemente del método utilizado en la elaboración de las tabletas, mientras que la actividad desintegrante de la carboximetilquitosana fue afectada por el proceso de granulación.A comparative study of chitin and carboxymethylchitosan as disintegrating agents was wade made. The influence exerted bu tje method used in the preparation of the tablets on the disintegrating activity of both polymers was evaluated. Chitin proved to have good characteristics as a disintegrating agent independently of the method used to make tablets. The disintegrating activity of carboxymethylchitosan was affected by the granulation process.

  10. Conocimiento como diseño

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Garzón Gaitán

    1998-06-01

    Full Text Available El artículo es una síntesis de un trabajo experimental en curso que tiene un hilo conductor: la educación en ingeniería y la preocupación acerca de cómo mejorarla; específicamente se busca precisar qué papel desempeña el diseño en la creación de capacidades tecnológicas, especialmente de innovación, en nuestros ingenieros para poder incidir en el desarrollo nacional y como la mejor manera de aprender. Se mostrará que diseño y aprendizaje tienen estructuras paralelas y, por tanto, la formación de ingenieros e innovadores debe darse en un doble sentido: aprendiendo a diseñar y aprender diseñando; se argumentará, además, como los problemas débilmente estructurados contribuyen a la creación de las competencias deseadas en los ingenieros.

  11. A Liberdade como tema: um debate italiano

    Directory of Open Access Journals (Sweden)

    Rego Walquiria D. Leão

    2002-01-01

    Full Text Available O presente trabalho rememora e analisa os termos e as categorias mobilizadas no debate teórico e político, sobre a questão da liberdade, realizado entre liberais-socialistas e comunistas italianos ocorrido nos anos vinte e trinta do século XX. De certo modo, a polêmica esteve presente na fundação mesma do Partido Comunista Italiano, através das reflexões teóricas e da colaboração estreita existente entre o liberal, Piero Gobetti e o marxista, Antonio Gramsci. O diálogo acompanhou a vida do PCI nos mais diversos momentos de sua história, tanto nos momentos de compartilhamento cívico, como o da luta antifascista e a organização da resistência, como nos tempos de reconstrução da Itália nos anos de 1950. Polemizaram assim, pelo lado liberal socialista, Norberto Bobbio, e pelo comunista, o então secretário geral do P.C.I., Palmiro Togliatti.

  12. Bloque de tierra comprimida como material constructivo

    Directory of Open Access Journals (Sweden)

    Óscar Javier Gutiérrez Junco

    2011-07-01

    Full Text Available La construcción con tierra es poco usada en la actualidad debido a la falta de difusión e investigación, y a que es relacionada con la pobreza; por ende, se desaprovechan muchas de sus ventajas, como la abundancia demateria prima, la localización, la disponibilidad, el reciclaje, la producción sin consumo de energía (calorífica, el bajo costo y la resistencia –con un adecuado estudio del material tierra, de la estructuración y del suelo de fundación–; otras de sus ventajas son el aislamiento térmico y acústico. Con el paso del tiempo se han mejorado las técnicas constructivas con tierra, realizando estabilizaciones e implementando el uso de maquinaria y herramienta mecánica para elaborar bloques de tierra comprimida, y así facilitar el trabajo y obtener mayor rendimiento. Este artículo presenta la tierra como material constructivo, las técnicas o sistemas constructivos, los bloques de tierra comprimida (BTC y algunos ensayos realizados a estos bloques.

  13. Las comunidades locales como estructuras meso.

    Directory of Open Access Journals (Sweden)

    Ferrand, Alexis

    2002-09-01

    Full Text Available Entre el nivel micro y el nivel macro: meso. Si el nivel macro está definido por la regulación nacional, estatal o del mercado y el nivel micro por la regulación interpersonal, una agencia de regulación intermediaria de mayor importancia ha sido definida como “comunidad local” (Wellman, Fischer. Aparte de las dimensiones organizacionales (organizaciones locales, clubes, tiendas... e institucionales (poder local, partidos... locales, es posible definir algunas propiedades estructurales pertinentes de los sistemas de relaciones interpersonales privadas: uno es el grado de “cerrado” (closure local (Barnes: redes locales vs. transversales, o la “dualidad” de estos sistemas. Apoyándose en la idea de que la eficiencia de los “puentes” reside en el tipo de cliques que conectan (Lin, es posible definir tipos variados de micro-estructuras, cuyas distribuciones en diferentes localidades son indicadores sucedáneos o aproximaciones de las diferentes meso estructuras de sistemas relacionales como combinaciones de redes “locales” y “no locales”.

  14. Consumo y entretenimiento: los grandes almacenes como espacio de sociabilidad

    National Research Council Canada - National Science Library

    Rocha, Everardo; Amaral, Maria

    2009-01-01

    .... Por un lado, la aparicion de los grandes almacenes como un nuevo lugar de sociabilidad y, por el otro, este mismo lugar como parte de la construccion de la propia identidad del consumidor moderno...

  15. Trimer effects in fragment molecular orbital-linear combination of molecular orbitals calculation of one-electron orbitals for biomolecules.

    Science.gov (United States)

    Kobori, Tomoki; Sodeyama, Keitaro; Otsuka, Takao; Tateyama, Yoshitaka; Tsuneyuki, Shinji

    2013-09-07

    The fragment molecular orbital (FMO)-linear combination of molecular orbitals (LCMO) method incorporates as an efficient post-process calculation of one-electron orbitals of the whole system after the FMO total energy calculation. A straightforward way to increase the accuracy is inclusion of the trimer effect. Here, we derive a comprehensive formulation called the FMO3-LCMO method. To keep the computational costs of the trimer term low enough, we use a matrix-size reduction technique. We evaluated the accuracy and efficiency of the FMO3-LCMO scheme in model biological systems (alanine oligomer and chignolin). The results show that delocalized electronic orbitals with covalent and hydrogen bonds are better described at the trimer level, and the FMO3-LCMO method is applicable to quantitative evaluations of a wide range of frontier orbitals in large biosystems.

  16. Small Orbital Stereo Tracking Camera Technology Development

    Science.gov (United States)

    Bryan, Tom; MacLeod, Todd; Gagliano, Larry

    2016-01-01

    On-Orbit Small Debris Tracking and Characterization is a technical gap in the current National Space Situational Awareness necessary to safeguard orbital assets and crew. This poses a major risk of MOD damage to ISS and Exploration vehicles. In 2015 this technology was added to NASA's Office of Chief Technologist roadmap. For missions flying in or assembled in or staging from LEO, the physical threat to vehicle and crew is needed in order to properly design the proper level of MOD impact shielding and proper mission design restrictions. Need to verify debris flux and size population versus ground RADAR tracking. Use of ISS for In-Situ Orbital Debris Tracking development provides attitude, power, data and orbital access without a dedicated spacecraft or restricted operations on-board a host vehicle as a secondary payload. Sensor Applicable to in-situ measuring orbital debris in flux and population in other orbits or on other vehicles. Could enhance safety on and around ISS. Some technologies extensible to monitoring of extraterrestrial debris as well To help accomplish this, new technologies must be developed quickly. The Small Orbital Stereo Tracking Camera is one such up and coming technology. It consists of flying a pair of intensified megapixel telephoto cameras to evaluate Orbital Debris (OD) monitoring in proximity of International Space Station. It will demonstrate on-orbit optical tracking (in situ) of various sized objects versus ground RADAR tracking and small OD models. The cameras are based on Flight Proven Advanced Video Guidance Sensor pixel to spot algorithms (Orbital Express) and military targeting cameras. And by using twin cameras we can provide Stereo images for ranging & mission redundancy. When pointed into the orbital velocity vector (RAM), objects approaching or near the stereo camera set can be differentiated from the stars moving upward in background.

  17. REPENSANDO LA CRISIS COMO CONCRECIÓN CONCEPTUAL

    Directory of Open Access Journals (Sweden)

    Mario González Arencibia

    2006-07-01

    Full Text Available El ensayo pretende contribuir a la reflexión sobre la crisis como concreción conceptual desde el enfoque marxista. Desde el punto de vista metodológico, asume como aspecto central a la crisis como el resultado de múltiples manifestaciones, siendo un proceso de determinaciones, que contiene una relación de causa y efecto, que abarca esta como un todo único y de manera dialéctica.

  18. Las javieradas como caso de estudio

    Directory of Open Access Journals (Sweden)

    Mª Cruz Porcal Gonzalo

    2006-01-01

    Full Text Available A pesar de su todavía modesta participación en la economía y en el empleo regional, el turismo en Navarra ha mostrado durante los últimos años un significativo dinamismo tal y como, por ejemplo, lo testimonia el incremento del número de visitantes y de las empresas turísticas. Favorecido por una serie de circunstancias de índole variada, este desarrollo turístico se sustenta en una gran diversidad geográfica y cultural patente en los paisajes, el arte, las fiestas, la gastronomía, etc. Pero Navarra es, a su vez, una región que secularmente ha otorgado un gran peso a la tradición y a las creencias religiosas. En este contexto, algunas de las numerosas acciones emprendidas por la administración regional para dinamizar el sector turístico se han encaminado a revalorizar dos importantes legados culturales: el castillo de Javier y el Camino de Santiago. Se aprecia que ambos se hallan estrechamente relacionados con el turismo cultural, el turismo religioso y las peregrinaciones, unos fenómenos que hunden sus raíces en tiempos pasados pero que continúan teniendo en la actualidad una indudable relevancia a escala mundial. La intención primordial del presente trabajo es analizar el turismo de peregrinaciones en Navarra, más concretamente, el que tiene como destino del viaje la cuna de San Francisco Javier. Con dicho afán, se realiza una reflexión conceptual previa y un breve repaso de las fiestas y tradiciones religiosas que forman parte del patrimonio cultural intangible de Navarra, haciendo particular hincapié en las romerías y en el Camino de Santiago. Al hilo de ello, se afronta, a continuación, el estudio de la peregrinación más singular y populosa de Navarra: la Javierada. Su origen, sus principales rasgos, el perfil y las motivaciones de los peregrinos, los caracteres e hitos más importantes del recorrido, las peculiaridades del destino —entendido como lugar sagrado y espacio turístico— constituyen las principales

  19. Arquitectura como percepción

    Directory of Open Access Journals (Sweden)

    Mañana Borrazás, Patricia

    2003-12-01

    Full Text Available This text sets out to illustrate types of basic analysis in researching a question as intrinsically human as perception. In the analysis of a construction, the aspects relative to perception allow us to access interesting information as to how a construction functions and what is implied by its different spaces, information which is in direct relation to more human, living aspects of architecture. These analyses complement formal analyses, as while these allow us to describe a construction in time and space, analyses of perception seek to stress the existing relationship between the human being and the construction, understanding architecture as a physical element to be experienced and which has been constructed to create a favourable atmosphere for certain perceptions. The study first shows the most basic elements in perception analysis and how these support a methodology that attempts to understand a construction in all its aspects (formal, social, symbolic, giving as an example a Neolithic Galician burial mound.Este texto trata de ilustrar los tipos de análisis básicos para investigar una cuestión tan intrínsecamente humana como la percepción. En el análisis de una construcción, los aspectos relativos a la percepción nos permiten acceder a una interesante información de cómo una construcción funciona y qué implican sus distintos espacios, información en directa relación con los aspectos más humanos y vivenciales de la arquitectura. Son unos análisis complementarios a los análisis formales, ya que mientras estos nos permiten describir en el espacio y en el tiempo una construcción, los análisis de percepción tratan de incidir en la relación existente entre el ser humano y la construcción, entendiendo a la arquitectura también como elemento físico a experimentar y que ha sido construido para propiciar ciertas percepciones. Se exponen en primer lugar las claves más básicas de los análisis de percepción y cómo estos se

  20. A strange attractor in the unfolding of an orbit-flip homoclinic orbit

    NARCIS (Netherlands)

    Naudot, [No Value

    2002-01-01

    An orbit-flip homoclinic orbit Gamma of a vector field defined on R-3 is a homoclinic orbit to an equilibrium point for which the one-dimensional unstable manifold of the equilibrium point is connected to the one-dimensional strong stable manifold. In this paper, we show that in a generic unfolding

  1. Predictability in orbital reconstruction: a human cadaver study: part I: endoscopic-assisted orbital reconstruction

    NARCIS (Netherlands)

    Dubois, L.; Jansen, J.; Schreurs, R.; Saeed, P.; Beenen, L.; Maal, T.J.J.; Gooris, P.J.J.; Becking, A.G.

    2015-01-01

    In the treatment of orbital defects, surgeon errors may lead to incorrect positioning of orbital implants and, consequently, poor clinical outcomes. Endoscopy can provide additional visualization of the orbit through the transantral approach. We aimed to evaluate whether endoscopic guidance during o

  2. Predictability in orbital reconstruction: A human cadaver study. Part II: Navigation-assisted orbital reconstruction

    NARCIS (Netherlands)

    Dubois, L.; Schreurs, R.; Jansen, J; Maal, T.J.J.; Essig, H.; Gooris, P.J.; Becking, A.G.

    2015-01-01

    Preformed orbital reconstruction plates are useful for treating orbital defects. However, intraoperative errors can lead to misplaced implants and poor outcomes. Navigation-assisted surgery may help optimize orbital reconstruction. We aimed to explore whether navigation-assisted surgery is more pred

  3. Predictability in orbital reconstruction: A human cadaver study. Part I: Endoscopic-assisted orbital reconstruction

    NARCIS (Netherlands)

    Dubois, L.; Jansen, J; Schreurs, R.; Saeed, P.; Beenen, L.; Maal, T.J.J.; Gooris, P.J.; Becking, A.G.

    2015-01-01

    In the treatment of orbital defects, surgeon errors may lead to incorrect positioning of orbital implants and, consequently, poor clinical outcomes. Endoscopy can provide additional visualization of the orbit through the transantral approach. We aimed to evaluate whether endoscopic guidance during o

  4. Predictability in orbital reconstruction: a human cadaver study: part II: navigation-assisted orbital reconstruction

    NARCIS (Netherlands)

    Dubois, L.; Schreurs, R.; Jansen, J.; Maal, T.J.J.; Essig, H.; Gooris, P.J.J.; Becking, A.G.

    2015-01-01

    Preformed orbital reconstruction plates are useful for treating orbital defects. However, intraoperative errors can lead to misplaced implants and poor outcomes. Navigation-assisted surgery may help optimize orbital reconstruction. We aimed to explore whether navigation-assisted surgery is more pred

  5. Objective measurement of motion in the orbit

    NARCIS (Netherlands)

    Abramoff, M.D.

    2001-01-01

    The research described in the thesis had two major aims: to find methods for objective measurement of motion in the orbit, and to determine the clinical use of these methods in patients with orbital disorders. This implied that a number of research questions had to be answered in the fields of both

  6. Orbital pseudotumor imaged with Ga-67 citrate

    Energy Technology Data Exchange (ETDEWEB)

    Jaikishen, P.; Bateman, J.L.; Shreeve, W.W. (Veterans Administration Medical Center, Northport, NY (USA))

    1989-11-01

    An orbital pseudotumor causing proptosis, diplopia, and gaze palsy was imaged with Ga-67 citrate and showed persistent intense activity for five days. This may be the first case of gallium uptake into an orbital pseudotumor to be reported in the literature. This case report demonstrates the use of Ga-67 citrate imaging in the early diagnostic workup of this disorder.

  7. The Homoclinic Orbits in Nonlinear Schroedinger Equation

    Institute of Scientific and Technical Information of China (English)

    PengchengXU; BolingGUO; 等

    1998-01-01

    The persistence of Homoclinic orbits for perturbed nonlinear Schroedinger equation with five degree term under een periodic boundary conditions is considered.The exstences of the homoclinic orbits for the truncation equation is established by Melnikov's analysis and geometric singular perturbation theory.

  8. Orbiter Water Dump Nozzles Redesign Lessons Learned

    Science.gov (United States)

    Rotter, Hank

    2017-01-01

    Hank Rotter, NASA Technical Fellow for Environmental Control and Life Support System, will provide the causes and lessons learned for the two Space Shuttle Orbiter water dump icicles that formed on the side of the Orbiter. He will present the root causes and the criticality of these icicles, along with the redesign of the water dump nozzles and lessons learned during the redesign phase.

  9. Extraskeletal myxoid chondrosarcoma of the orbit

    Directory of Open Access Journals (Sweden)

    Abdullah M Al-Osaily

    2016-01-01

    Full Text Available Extraskeletal myxoid chondrosarcoma (EMC is a rare soft tissue tumor. Numerous cases of EMC have been reported in different anatomical locations. There is currently only a single case of EMC of the orbit and that was reported in 1985. We report a second case of orbital EMC in a 34-year-old healthy male.

  10. Orbital dissection defatting technique for Graves disease.

    Science.gov (United States)

    Hecht, S D; Guibor, P; Wolfley, D; Wiggs, E O

    1984-04-01

    Five patients with Graves disease and bilateral proptosis were treated with different incisional approaches. They all underwent orbital decompression by removal of the anterior medial orbital walls, the anterior ethmoidal sinuses, the orbital floors, and multiple incisions of the orbital periosteums . The defatting technique, which consists of applying manual anterior orbital pressure with alternate removing of small lobules of fat, was added when it was intraoperatively decided by Hertel exophthalmometer measurement that more decompression was needed. It is estimated that one-third more reduction in proptosis resulted. An average total decrease in proptosis of 9 mm per orbit occurred. Both visual accuities and visual fields returned to normal. The only important complication was the development of hypertropia in down gaze in one patient. A potential value of this technique is its use with orbital floor decompression alone. It may be possible to avoid removing the medial and lateral walls of the orbit, thereby decreasing complications. Defatting may also be a valuable addition in those rare cases where all decompression techniques available are needed to affect an adequate decompression.

  11. Posttraumatic Orbital Emphysema: A Numerical Model

    Directory of Open Access Journals (Sweden)

    Andrzej Skorek

    2014-01-01

    Full Text Available Orbital emphysema is a common symptom accompanying orbital fracture. The pathomechanism is still not recognized and the usually assumed cause, elevated pressure in the upper airways connected with sneezing or coughing, does not always contribute to the occurrence of this type of fracture. Observations based on the finite model (simulating blowout type fracture of the deformations of the inferior orbital wall after a strike in its lower rim. Authors created a computer numeric model of the orbit with specified features—thickness and resilience modulus. During simulation an evenly spread 14400 N force was applied to the nodular points in the inferior rim (the maximal value not causing cracking of the outer rim, but only ruptures in the inferior wall. The observation was made from 1·10-3 to 1·10-2 second after a strike. Right after a strike dislocations of the inferior orbital wall toward the maxillary sinus were observed. Afterwards a retrograde wave of the dislocation of the inferior wall toward the orbit was noticed. Overall dislocation amplitude reached about 6 mm. Based on a numeric model of the orbit submitted to a strike in the inferior wall an existence of a retrograde shock wave causing orbital emphysema has been found.

  12. Optimal parking orbits for manned Mars missions

    Science.gov (United States)

    Cupples, Michael L.; Nordwall, Jill A.

    This paper summarizes a Mars parking orbit optimization effort. This parking orbit study includes the selection of optimal elliptic Mars parking orbits that meet mission constraints and that include pertinent apsidal misalignment losses. Mars missions examined are for the opportunity years of 2014, 2016, and 2018. For these mission opportunities, it is shown that the optimal parking orbits depend on the year that the mission occurs and are coupled with the outbound, Mars stay, and return phases of the mission. Constraints included in the parking orbit optimization process are periapsis lighting angle (related to a daylight landing requirement), periapsis latitude (related to a landing latitude range requirement) and the vehicle Trans-Earth-Injection stage mass. Also, effects of mission abort requirements on optimal parking orbits are investigated. Off-periapsis maneuvers for Mars orbit capture were found to be cost effective in reducing the mission delta-V for the 2016 abort from Mars capture scenario. The total capture and departure delta-V was `split' between the capture maneuver and the departure maneuver to reduce the 2016 Mars departure delta-V to below the level of the corresponding stage of the 2014 baseline mission. Landing results are provided that show Mars landing site access from the optimal elliptic parking orbits for Mars excursion vehicles with low (0.2) and high (1.3 and 1.6) lift to drag ratio.

  13. Linear Magnetoelectric Effect by Orbital Magnetism

    NARCIS (Netherlands)

    Scaramucci, A.; Bousquet, E.; Fechner, M.; Mostovoy, M.; Spaldin, N. A.

    2012-01-01

    We use symmetry analysis and first-principles calculations to show that the linear magnetoelectric effect can originate from the response of orbital magnetic moments to the polar distortions induced by an applied electric field. Using LiFePO4 as a model compound we show that spin-orbit coupling part

  14. Spin-Orbit induced semiconductor spin guides

    OpenAIRE

    Valin-Rodriguez, Manuel; Puente, Antonio; Serra, Llorens

    2002-01-01

    The tunability of the Rashba spin-orbit coupling allows to build semiconductor heterostructures with space modulated coupling intensities. We show that a wire-shaped spin-orbit modulation in a quantum well can support propagating electronic states inside the wire only for a certain spin orientation and, therefore, it acts as an effective spin transmission guide for this particular spin orientation.

  15. Three Temperate Neptunes Orbiting Nearby Stars

    CERN Document Server

    Fulton, Benjamin J; Weiss, Lauren M; Sinukoff, Evan; Petigura, Erik A; Isaacson, Howard; Hirsch, Lea; Marcy, Geoffrey W; Henry, Gregory W; Grunblatt, Samuel K; Huber, Daniel; von Braun, Kaspar; Boyajian, Tabetha S; Kane, Stephen R; Wittrock, Justin; Horch, Elliott P; Ciardi, David R; Howell, Steve B; Wright, Jason T; Ford, Eric B

    2016-01-01

    We present the discovery of three modestly-irradiated, roughly Neptune-mass planets orbiting three nearby Solar-type stars. HD 42618 b has a minimum mass of $15.4 \\pm 2.4$ M$_{\\oplus}$, a semi-major axis of 0.55 AU, an equilibrium temperature of 337 K, and is the first planet discovered to orbit the solar analogue host star, HD 42618. We also discover new planets orbiting the known exoplanet host stars HD 164922 and HD 143761 ($\\rho$ CrB). The new planet orbiting HD 164922 has a minimum mass of $12.9 \\pm 1.6$ M$_{\\oplus}$ and orbits interior to the previously known Jovian mass planet orbiting at 2.1 AU. HD 164922 c has a semi-major axis of 0.34 AU and an equilibrium temperature of 418 K. HD 143761 c orbits with a semi-major axis of 0.44 AU, has a minimum mass of $25 \\pm 2$ M$_{\\oplus}$, and is the warmest of the three new planets with an equilibrium temperature of 445 K. It orbits exterior to the previously known warm Jupiter in the system. A transit search using space-based CoRoT data and ground-based photom...

  16. Orbital infarction in sickle cell disease.

    Science.gov (United States)

    Blank, J P; Gill, F M

    1981-06-01

    Bone infarction is a common occurrence in sickle cell disease. Described are three cases in which frontal headache, proptosis, and lid edema were seen with infarction of the orbital bone. Radionuclide scanning was useful in distinguished bone infarction from orbital infection in one case.

  17. On-Orbit Propulsion OMS/RCS

    Science.gov (United States)

    Hurlbert, Eric A.

    2001-01-01

    This slide presentation reviews the Space Shuttle's On-Orbit Propulsion systems: the Orbital Maneuvering System (OMS) and the Reaction Control System (RCS). The functions of each of the systems is described, and the diagrams of the systems are presented. The OMS/RCS thruster is detailed and a trade study comparison of non-toxic propellants is presented.

  18. Hume: a teoria social como sistema

    Directory of Open Access Journals (Sweden)

    Rolf Kuntz

    2011-12-01

    Full Text Available Hume defende na Investigação sobre o Entendimento Humano a parcimônia no uso de princípios explicativos. Tenta-se mostrar, neste artigo, como ele procurou seguir essa diretriz em seus trabalhos sobre os sentimentos morais, a história, a política e a economia. Explora-se, ao mesmo tempo, o caráter sistemático do projeto enunciado no começo do Tratado da Natureza Humana.In his Enquiry on Human Understanding Hume proposes a rule of parcimony in the use of explanatory principles. This essay is an attempt to show how the philosopher managed to follow that rule in his writings on moral sentiments, history, politics and economics. At the same time, it explores the systematic character of the project described in the presentation of the Treatise on Human Nature.

  19. El "Clientelismo" politico como material novelable

    Directory of Open Access Journals (Sweden)

    Cesar de Vicente Hernando

    2002-12-01

    Full Text Available Lo que instituye el "realismo" en los aproximadamente cien años que median entre la "revolución" burguesa de 1868 ("la Gloriosa" y la ruptura estética de los años sesenta ya en el siglo XX es precisamente lo que definió (y subyace a su producción novelística Benito Peréz Galdós con el título de "La sociedad presente como materia novelable", discurso leído ante la Real Academia Española, con motivo de su recepción en 1897. Este texto es una justificación teórica de lo que viene a ser la inscripción en la literatura de las lunchas y transformaciones ideológicas que la burguesía establece.

  20. Como medir e combater a pobreza?

    Directory of Open Access Journals (Sweden)

    Henrique Rattner

    2010-09-01

    Full Text Available

    Esta semana, começo de agosto de 2010, o IBGE – Instituto Brasileiro de Geografia e Estatística iniciou o Censo de 2010, o maior e mais aperfeiçoado levantamento de dados sobre a população brasileira. Serão coletadas informações sobre a situação econômica, social e cultural da nação, além de dados básicos para os estudos demográficos, tais como a distribuição por gênero, estrutura etária, situação familiar, escolaridade e posse de bens materiais considerados essenciais para um padrão de vida decente.

  1. Los adjuntos como componentes del sintagma nominal

    DEFF Research Database (Denmark)

    Müller, Henrik Høeg

    2000-01-01

    Suponiendo una profunda analogía entre la oración y el sintagma nominal, se comprueba en el presente artículo que la distinción funcional entre argumentos y adjuntos, ampliamente reconocida en el ámbito oracional, encuentra su contrapartida directa en el nivel sintagmático. Establecida esta...... división fundamental, el artículo se concentra en la descripción de la función de los adjuntos dentro del sintagma nominal, poniendo énfasis en los conceptos de referencialidad, incorporación y grado de cohesión como factores determinantes para el alcance predicativo del adjunto. Además, en un intento de...

  2. El desarrollo organizacional como facilitador del cambio

    Directory of Open Access Journals (Sweden)

    Henry Molina

    2000-01-01

    Full Text Available El Desarrollo Organizacional (DO ha surgido de las exigencias de un ambiente cambiante y del conocimiento originado por la evolución de las ciencias sociales aplicadas. Los cambios rápidos dentro del entorno organizacional han exigido procesos y estructuras organizacionales que sean mucho más flexibles y que brinden mayor capacidad de respuesta que las estructuras tradicionales. Se requieren nuevas capacidades individuales y organizacionales que puedan impulsar las iniciativas individuales y la disposición para asumir riesgos. Igualmente, debemos considerar que existen marcadas diferencias entre las características individuales de los gerentes, las características individuales de los profesionales del desarrollo organizacional, sus habilidades y conocimientos y los estilos de las intervenciones del desarrollo organizacional. Tbdas estas diferencias hacen que sea virtualmente imposible predecir con precisión el curso y los resultados de las intervenciones en las organizaciones cliente. En este documento presento un resumen de lecturas acerca del desarrollo organizacional como facilitador del cambio; y expongo un marco de referencia para la comprensión de los factores determinantes de la relación entre las intervenciones del DO y los cambios organizacionales con el fin de mejorar la predictabilidad y la efectividad de los esfuerzos de cambio de sus intervenciones. El propósito central de este documento es dotar a los agentes de cambio de conocimiento y herramientas para que comprendan las características del cambio, los métodos de aprendizaje tanto de las organizaciones como de la gente y de cómo los agentes de cambio deben diseñar sus intervenciones y posteriormente mejorar los resultados de las mismas

  3. O corpo como sintoma da cultura

    Directory of Open Access Journals (Sweden)

    Lúcia Santaella

    2008-09-01

    Full Text Available Este artigo busca refletir sobre a contemporânea onipresença do corpo em todas as esferas da cultura. Para alguns autores, o corpo virou uma verdadeira obsessão. Está perturbadoramente em todas as partes. Indo além da mera constatação, o argumento que desenvolvo neste artigo é o de que o corpo está obsessivamente onipresente porque se tornou um dos sintomas da cultura do nosso tempo. Diferentemente dos sintomas histéricos do século XIX, que se davam no corpo, que marcavam o corpo, gradativamente esses sintomas foram crescendo até tomar o corpo ele mesmo como sintoma da cultura. Como o conceito de sintoma exige, o tratamento teórico da discussão que aqui se desenvolverá está baseado na psicanálise, especialmente de Freud e Lacan. Abstrat: This paper discusses the contemporary omnipresence of the body in every cultural sphere. For some authors, the body has become a real obsession. It is disturbingly everywhere. Going beyond the mere recognition of the problem, this article argues that the body is obsessively present because it has become a symptom of our cultural era. Different from the nineteenth century hysterical symptoms that occurred in the body, that marked the body, gradually these symptoms grew to the extent of turning the body itself into a symptom of the culture. As the concept of symptom demands, the theoretical treatment of this discussion is based on psychoanalysis, especially on Freudian and Lacanian discourses. Palavras-chave: Cultura, sintoma, corpo, psicanálise, real, imaginário, simbólico. Key-words: Culture, symptom, body, psychoanalysis, the real, the imaginary, the symbolic.

  4. Las comunidades de nematodos como indicadores ambientales

    Directory of Open Access Journals (Sweden)

    Ingrid Varela-Benavides

    2014-03-01

    Full Text Available El uso de indicadores ambientales que permitan describir el estado de un ecosistema y las presiones a las que está sometido, así como indicar los avances logrados con las prácticas de mitigación establecidas son temas de interés en la actualidad. Entre los organismos que han sido estudiados por su potencial como indicadores ambientales se encuentran los nemátodos. Estos animales son cos­mopolitas y juegan un papel importante en todos los ecosistemas; además, la comunidad de nemátodos cambia de forma predecible con las perturbaciones del ambiente. Estos cambios están correlacionados con indicadores del funcionamiento del ecosistema. Aunque existen taxones indicadores de condiciones en particular, también se han desarrollado índices que permiten describir la diversidad, la estructura de la comunidad y la sucesión ecológica. También se han creado modelos indicadores de las vías metabólicas en el ecosistema del suelo. Estos índices y modelos se basan en las diferentes estrategias de supervivencia que tienen los taxones de nematodos, ya sean colonizadores o persisten­tes. Los colonizadores se consideran oportunistas de ambientes enriquecidos y los persistentes son indicadores de sistemas no perturbados. Por otro lado, con el desarrollo de modernas técnicas de secuenciación se espera poder evaluar la diversidad biológica de manera más eficiente, logrando utili­zar a los nemátodos en programas de monitoreo ambiental a nivel nacional e internacional.

  5. O PRODUTO COMO CAUSADOR DE ACIDENTES

    Directory of Open Access Journals (Sweden)

    Widomar Carpes Jr

    2004-06-01

    Full Text Available Neste artigo analisa-se a contribuição dos produtos para a geração de acidentes, apresentando-se estatísticas de acidentes de trabalho, de trânsito e aeronáuticos. Além disso, para melhor ilustrar a relação entre produtos e a ocorrência de acidentes, alguns casos de acidentes ocorridos e divulgados pela mídia são comentados. As estatísticas e os casos comentados demonstram a importância do estudo dos acidentes envolvendo produtos, evidenciando que praticamente todos os acidentes estão relacionados com o uso de produtos industrializados. Então, se analisa histórica e criticamente as principais teorias de acidentes de trabalho, porque são as únicas teorias existentes em relação aos acidentes. Além delas, são analisados os diversos conceitos sobre o erro humano e sua ocorrência, pois estes são apontados como grandes causadores de acidentes. Nesta análise, se observa que os acidentes estão mais relacionados aos perigos ou às características perigosas dos produtos do que às atitudes e ao comportamento do usuário. Faz-se uma revisão dos conceitos associados aos acidentes, tais como perigo, risco, acidente e dano, a partir dos quais apresenta-se um fluxograma contendo os elementos necessários para a manifestação dos acidentes. Ao final, conclui-se que a participação dos produtos na ocorrência de acidentes é evidente e que o comportamento do usuário é dependente das características do produto e da situação na qual ele é utilizado.

  6. Taxonomia como elemento estruturante em portais corporativos

    Directory of Open Access Journals (Sweden)

    Luciane Paula Vital

    2012-01-01

    Full Text Available Este trabalho busca discutir os objetivos e requisitos necessários a um portal corporativo e de que forma a construção de uma taxonomia possibilita atingi-los, configurando-se em um modelo de representação da informação e do conhecimento nesse contexto. Apresenta a evolução das intranets em direção aos portais, construindo um ponto de acesso comum as informações organizacionais. Apresenta uma revisão sobre as funcionalidades que um portal corporativo deve apresentar. Conceitua e caracteriza os diferentes tipos de taxonomia e a forma com que organiza e representa a informação. Por fim, apresenta a taxonomia como ferramenta para a determinação de categorias conceituais e de relacionamentos semânticos de uma área, assim como, da estrutura navegacional, permitindo qualificar o processo de recuperação da informação. Palavras-chave Taxonomia. Portais Corporativos. Representação da Informação. Organização da Informação. Abstract This article discusses the objectives and requirements necessary for a corporate portal and how to build a taxonomy allows for to reach them, becoming a model of representation information and knowledge in this context. Shows the evolution of intranets into the portal, building a common access point to information organizational. Presents an overview of the features that an enterprise portal should present. Conceptualizes and describes the different types of taxonomy and the way it organizes and represents information. Finally, the taxonomy as a tool for determining the conceptual categories and semantic relationships of an area, as well as the navigational structure, allowing the process to qualify for retrieval. Keywords Taxonomy. Enterprise Portal. Information Representation. Information Organization.

  7. The Orbits of Saturn's Small Satellites

    Science.gov (United States)

    Spitale, J. N.; Jacobson, R. A.; Porco, C. C.; Owen, W. M.; Charnoz, S.

    2005-05-01

    We report on the orbits of the small, inner Saturnian satellites, either recovered or newly-discovered in recent Cassini imaging observations (excluding Helene, Telesto and Calypso, which will be discussed by another group). Using combined Cassini and Voyager observations, the mean motions of Pan and Atlas have been refined by several orders of magnitude. The Atlas orbit is based on a numerical integration perturbed by all of the massive Saturnian satellites including Prometheus, Pandora, Janus, and Epimetheus. We find that the dominant perturber is Prometheus. Cassini, Voyager, HST, and Earth-based data have been used to refine the orbits of Janus, Epimetheus, Prometheus and Pandora. The orbits of the co-orbitals, Janus and Epimetheus, remain stable; their orbital swap does not occur until Februrary, 2006. The orbits of Prometheus and Pandora remain close to recent values (Jacobson and French 2004, Icarus, 172, 382). Six new objects have been discovered to date -- three (S/2004 S3, S4, S6) in close proximity to the F ring, two (S/2004 S1(Methone), S/2004 S2(Pallene)) between the orbits of Mimas and Enceladus, and one (S/2004 S5(Polydeuces)) co-orbital with Dione, trailing by ˜60 deg (Porco et al., Science 307, 25 Feb 2005). One of the F-ring objects -- S/2004 S3 -- was seen over a 118-day interval, but none of those objects, including S/2004 S3, were subsequently recovered in an F-ring movie acquired on 15 November 2004 (29 days after the last sighting of S/2004 S3) with an image scale of 4 km/pixel, in which all were expected to appear. Consequently, we are confident only that Methone, Pallene and Polydeuces are solid satellites; S/2004 S3, S4 and S6 may be transient clumps. Our orbital fits, both precessing ellipse models and orbital integrations, suggest that Pallene is the same object as S/1981 S14, imaged by Voyager 2 on 23 August 1981, contrary to our initial reports (IAU circular 8389). The orbital inclination and eccentricity of Methone are considerably

  8. Automated Selection of Active Orbital Spaces

    CERN Document Server

    Stein, Christopher J

    2016-01-01

    One of the key challenges of quantum-chemical multi-configuration methods is the necessity to manually select orbitals for the active space. This selection requires both expertise and experience and can therefore impose severe limitations on the applicability of this most general class of ab initio methods. A poor choice of the active orbital space may yield even qualitatively wrong results. This is obviously a severe problem, especially for wave function methods that are designed to be systematically improvable. Here, we show how the iterative nature of the density matrix renormalization group combined with its capability to include up to about one hundred orbitals in the active space can be exploited for a systematic assessment and selection of active orbitals. These benefits allow us to implement an automated approach for active orbital space selection, which can turn multi-configuration models into black box approaches.

  9. CASA Uno GPS orbit and baseline experiments

    Science.gov (United States)

    Schutz, B. E.; Ho, C. S.; Abusali, P. A. M.; Tapley, B. D.

    1990-01-01

    CASA Uno data from sites distributed in longitude from Australia to Europe have been used to determine orbits of the GPS satellites. The characteristics of the orbits determined from double difference phase have been evaluated through comparisons of two-week solutions with one-week solutions and by comparisons of predicted and estimated orbits. Evidence of unmodeled effects is demonstrated, particularly associated with the orbit planes that experience solar eclipse. The orbit accuracy has been assessed through the repeatability of unconstrained estimated baseline vectors ranging from 245 km to 5400 km. Both the baseline repeatability and the comparison with independent space geodetic methods give results at the level of 1-2 parts in 100,000,000. In addition, the Mojave/Owens Valley (245 km) and Kokee Park/Ft. Davis (5409 km) estimates agree with VLBI and SLR to better than 1 part in 100,000,000.

  10. Orbital Motion During Gravitational Lensing Events

    CERN Document Server

    Di Stefano, Rosanne

    2014-01-01

    Gravitational lensing events provide unique opportunities to discover and study planetary systems and binaries. Here we build on previous work to explore the role that orbital motion can play in both identifying and learning more about multiple-mass systems that serve as gravitational lenses. We find that a significant fraction of planet-lens and binary-lens light curves are influenced by orbital motion. Furthermore, the effects of orbital motion extend the range of binaries for which lens multiplicity can be discovered and studied. Orbital motion will play an increasingly important role as observations with sensitive photometry, such as those made by the space missions Kepler, Transiting Exoplanet Survey Satellite, (TESS), and WFIRST discover gravitational lensing events. Similarly, the excellent astrometric measurements made possible by GAIA will allow it to study the effects of orbital motion. Frequent observations, such as those made possible with the Korean Microlensing Telescope Network, KMTNet, will al...

  11. Orbital dystopia managed with unilateral brow suspension.

    Science.gov (United States)

    Taub, Peter J; Koch, R Michael

    2006-11-01

    Patients with orbital dystopia present with symptoms of diplopia and/or facial asymmetry. Repositioning of the orbit requires multiple osteotomies around the orbit, which presents significant complications. The authors present an alternative method to restore facial symmetry in the case of a 14-year-old patient with congenital orbital dystopia due to fibrosis of the sternocleidomastoid muscle. The patient had no ocular symptoms but did have asymmetric descent of the ipsilateral brow. He refused box osteotomy and repositioning of the orbit. Unilateral brow suspension was performed using an endoscopic technique and suspension sutures fixed to resorbable screws. Adequate brow elevation was noted in the immediate postoperative period and at 6 months; it successfully restored facial symmetry.

  12. Molecular orbital imaging for partially aligned molecules

    Science.gov (United States)

    Qin, Meiyan; Zhu, Xiaosong

    2017-01-01

    We investigate molecular orbital reconstruction using high-order harmonic emissions from partially aligned molecular ensembles. By carrying out the reconstruction procedure using the harmonic sampling with or without the spectral minimum, the roles of the harmonic phase and amplitude modulation due to the partial alignment can be separately studied. It is found that with the prior knowledge of the orbital symmetry, the reconstructed result is very sensitive to the modulation of the harmonic phase for the πg orbital, while in the case of σg orbital, the reconstructed result is mainly determined by the harmonic amplitude. These results can provide an important reference for the future experiment of molecular orbital imaging.

  13. Continuation of Sets of Constrained Orbit Segments

    DEFF Research Database (Denmark)

    Schilder, Frank; Brøns, Morten; Chamoun, George Chaouki;

    Sets of constrained orbit segments of time continuous flows are collections of trajectories that represent a whole or parts of an invariant set. A non-trivial but simple example is a homoclinic orbit. A typical representation of this set consists of an equilibrium point of the flow and a trajectory...... that starts close and returns close to this fixed point within finite time. More complicated examples are hybrid periodic orbits of piecewise smooth systems or quasi-periodic invariant tori. Even though it is possible to define generalised two-point boundary value problems for computing sets of constrained...... orbit segments, this is very disadvantageous in practice. In this talk we will present an algorithm that allows the efficient continuation of sets of constrained orbit segments together with the solution of the full variational problem....

  14. Primary orbital neuroblastoma with intraocular extension

    Directory of Open Access Journals (Sweden)

    Muthukrishnan Vallinayagam

    2015-01-01

    Full Text Available Neuroblastoma is an undifferentiated malignancy of primitive neuroblasts. Neuroblastoma is among the most common solid tumors of childhood. Orbital neuroblastoma is typically a metastatic tumor. In this case report, we describe a 2-year-old child with a rapidly progressing orbital tumor. Computed tomography revealed an orbital mass lesion with extraocular and intraocular components. An incisional biopsy was done, and a histopathological examination showed features suggestive of neuroblastoma. Systemic workup including ultrasonography of the abdomen, chest roentgenogram, whole body computed tomography, and bone scintigraphy showed no evidence of systemic involvement. The diagnosis of primary orbital neuroblastoma was made, and the child was subjected to chemotherapy followed by rapid melting of the tumor. Neuroblastoma should be considered in the differential diagnosis of childhood orbital tumors.

  15. Spin-orbit interactions between two baryons

    Energy Technology Data Exchange (ETDEWEB)

    Takeuchi, Sachiko [Japan College of Social Work, Kiyose, Tokyo (Japan); Morimatsu, Osamu [High Energy Accelerator Research Organization, Tanashi Branch (KEK-Tanashi), Tanashi, Tokyo (Japan); Tani, Yoshihiro; Oka, Makoto [Tokyo Inst. of Tech. (Japan). Dept. of Physics

    2000-04-01

    The spin-orbit interactions in the quark cluster models are reviewed in this article. The observed spin-orbit force between two nucleons is strong, while that in the excited baryons or in the {lambda}N interaction is small. We try to sort out whether the quark cluster model can produce a spin-orbit force which explains these features simultaneously. Various works which include the spin-orbit force with different origins such as gluons, mesons, or coupling to other channels are compared to each other. The roles of the symmetric and anti-symmetric spin- orbit forces in the NN scattering phase shifts and in the YN low-energy cross sections and the phase shifts are investigated. (author)

  16. CASA Uno GPS orbit and baseline experiments

    Science.gov (United States)

    Schutz, B. E.; Ho, C. S.; Abusali, P. A. M.; Tapley, B. D.

    1990-01-01

    CASA Uno data from sites distributed in longitude from Australia to Europe have been used to determine orbits of the GPS satellites. The characteristics of the orbits determined from double difference phase have been evaluated through comparisons of two-week solutions with one-week solutions and by comparisons of predicted and estimated orbits. Evidence of unmodeled effects is demonstrated, particularly associated with the orbit planes that experience solar eclipse. The orbit accuracy has been assessed through the repeatability of unconstrained estimated baseline vectors ranging from 245 km to 5400 km. Both the baseline repeatability and the comparison with independent space geodetic methods give results at the level of 1-2 parts in 100,000,000. In addition, the Mojave/Owens Valley (245 km) and Kokee Park/Ft. Davis (5409 km) estimates agree with VLBI and SLR to better than 1 part in 100,000,000.

  17. The statistical mechanics of planet orbits

    CERN Document Server

    Tremaine, Scott

    2015-01-01

    The final "giant-impact" phase of terrestrial planet formation is believed to begin with a large number of planetary "embryos" on nearly circular, coplanar orbits. Mutual gravitational interactions gradually excite their eccentricities until their orbits cross and they collide and merge; through this process the number of surviving bodies declines until the system contains a small number of planets on well-separated, stable orbits. In this paper we explore a simple statistical model for the orbit distribution of planets formed by this process, based on the sheared-sheet approximation and the ansatz that the planets explore uniformly all of the stable region of phase space. The model provides analytic predictions for the distribution of eccentricities and semimajor axis differences, correlations between orbital elements of nearby planets, and the complete N-planet distribution function, in terms of a single parameter that is determined by the planetary masses. The predicted properties are generally consistent ...

  18. Como reescribir funciones aleatorias multivariadas como univariadas para hacer cokrigeage. La teoría

    Directory of Open Access Journals (Sweden)

    Adrian Martínez-Vargas

    2010-03-01

    Full Text Available En el año 2005 Martínez-Vargas formuló un sistema de cokrigeage puro heterotópico para estimar una función aleatoria regionalizada (RF Z*(x definida como la combinación lineal de n RF's univariadas Zi(x, cuyos coeficientes 1i(x son indicatrices de un set disyuntivo de categorías i. Aparentemente este modelo se contradice pues asume que las covarianzas cruzadas existen en un mismo punto, a pesar de su carácter puramente heterotópico. Para evadir dicha contradicción se redefinió el set de RF Zi(x como una única RF Z(x,i, siendo los puntos (x,i y (x,j no coincidentes si i y j no son iguales. La heterotopía fue simplemente considerada como una omisión de la RF Z(x,. en los datos y en los puntos a estimar, no impuesta por el modelo; entonces el resultado es simplemente un caso particular del cokrigeage clásico. Con esta notación se reescribió el sistema de cokrigeage clásico como el sistema de krigeage de la RF univariada Z(x,i, asumiendo que esta posee un drift definido como m(x,i,j, donde los miembros fl(x,i,j de m(x,i,j pueden ser linealmente dependientes o independientes. Bajo esta notación el sistema de krigeage se reduce a un sistema univariado, la existencia de más de una variable o la presencia de heterotropía no impone la necesidad de manipulaciones extras para definir el sistema de ecuaciones de krigeage, incrementándose la eficiencia computacional.

  19. Small Orbital Stereo Tracking Camera Technology Development

    Science.gov (United States)

    Bryan, Tom; MacLeod, Todd; Gagliano, Larry

    2017-01-01

    Any exploration vehicle assembled or Spacecraft placed in LEO or GTO must pass through this debris cloud and survive. Large cross section, low thrust vehicles will spend more time spiraling out through the cloud and will suffer more impacts.Better knowledge of small debris will improve survival odds. Current estimated Density of debris at various orbital attitudes with notation of recent collisions and resulting spikes. Orbital Debris Tracking and Characterization has now been added to NASA Office of Chief Technologists Technology Development Roadmap in Technology Area 5 (TA5.7)[Orbital Debris Tracking and Characterization] and is a technical gap in the current National Space Situational Awareness necessary to safeguard orbital assets and crews due to the risk of Orbital Debris damage to ISS Exploration vehicles. The Problem: Traditional orbital trackers looking for small, dim orbital derelicts and debris typically will stare at the stars and let any reflected light off the debris integrate in the imager for seconds, thus creating a streak across the image. The Solution: The Small Tracker will see Stars and other celestial objects rise through its Field of View (FOV) at the rotational rate of its orbit, but the glint off of orbital objects will move through the FOV at different rates and directions. Debris on a head-on collision course (or close) will stay in the FOV at 14 Km per sec. The Small Tracker can track at 60 frames per sec allowing up to 30 fixes before a near-miss pass. A Stereo pair of Small Trackers can provide range data within 5-7 Km for better orbit measurements.

  20. Spacewire on Earth orbiting scatterometers

    Science.gov (United States)

    Bachmann, Alex; Lang, Minh; Lux, James; Steffke, Richard

    2002-01-01

    The need for a high speed, reliable and easy to implement communication link has led to the development of a space flight oriented version of IEEE 1355 called SpaceWire. SpaceWire is based on high-speed (200 Mbps) serial point-to-point links using Low Voltage Differential Signaling (LVDS). SpaceWIre has provisions for routing messages between a large network of processors, using wormhole routing for low overhead and latency. {additionally, there are available space qualified hybrids, which provide the Link layer to the user's bus}. A test bed of multiple digital signal processor breadboards, demonstrating the ability to meet signal processing requirements for an orbiting scatterometer has been implemented using three Astrium MCM-DSPs, each breadboard consists of a Multi Chip Module (MCM) that combines a space qualified Digital Signal Processor and peripherals, including IEEE-1355 links. With the addition of appropriate physical layer interfaces and software on the DSP, the SpaceWire link is used to communicate between processors on the test bed, e.g. sending timing references, commands, status, and science data among the processors. Results are presented on development issues surrounding the use of SpaceWire in this environment, from physical layer implementation (cables, connectors, LVDS drivers) to diagnostic tools, driver firmware, and development methodology. The tools, methods, and hardware, software challenges and preliminary performance are investigated and discussed.