DYNA3D/ParaDyn Regression Test Suite Inventory

Energy Technology Data Exchange (ETDEWEB)

Lin, Jerry I. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

2016-09-01

The following table constitutes an initial assessment of feature coverage across the regression test suite used for DYNA3D and ParaDyn. It documents the regression test suite at the time of preliminary release 16.1 in September 2016. The columns of the table represent groupings of functionalities, e.g., material models. Each problem in the test suite is represented by a row in the table. All features exercised by the problem are denoted by a check mark (√) in the corresponding column. The definition of “feature” has not been subdivided to its smallest unit of user input, e.g., algorithmic parameters specific to a particular type of contact surface. This represents a judgment to provide code developers and users a reasonable impression of feature coverage without expanding the width of the table by several multiples. All regression testing is run in parallel, typically with eight processors, except problems involving features only available in serial mode. Many are strictly regression tests acting as a check that the codes continue to produce adequately repeatable results as development unfolds; compilers change and platforms are replaced. A subset of the tests represents true verification problems that have been checked against analytical or other benchmark solutions. Users are welcomed to submit documented problems for inclusion in the test suite, especially if they are heavily exercising, and dependent upon, features that are currently underrepresented.

Diseño mediante elementos finitos de componentes estructurales de un cuadricóptero para impresión 3D

OpenAIRE

PARDO APARISI, IVÁN

2016-01-01

El trabajo tiene como objetivo diseñar componentes estructurales, mediante el método de elementos finitos, que serán utilizados en un dron de cuatro rotores (cuadricóptero). Una característica particular de este proyecto es que los componentes estructurales a diseñar serán fabricados mediante impresión 3D. Pardo Aparisi, I. (2016). Diseño mediante elementos finitos de componentes estructurales de un cuadricóptero para impresión 3D. http://hdl.handle.net/10251/75994. TFGM

Desarrollo práctico del proceso de captura y tratamiento digital en 3D de imágenes para ser utilizadas en impresión 3D y aplicaciones de animación y realidad aumentada

OpenAIRE

Soler Abelló, Joan

2014-01-01

El desarrollo práctico que se quiere elaborar tiene como objetivo describir paso a paso el proceso de captura o adquisición de datos de formas reales con cámaras capaces de obtener información 3D. Una vez realizada la captura, se deberá proceder a su tratamiento digital en 3D para posteriormente ser utilizadas en aplicaciones de realidad aumentada, animación e impresión 3D. The practical development that it is wanted to develop is to describe step by step the process for data capture or ac...

Nuevo cuestionario de emociones positivas para niños

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Laura Beatriz Oros

2014-05-01

Full Text Available El propósito de este trabajo fue diseñar y validar un nuevo instrumento para medir la experiencia emocional positiva de niños de 8 a 12 años de edad. La muestra piloto estuvo conformada por 445 niños (n= 221 y niñas (n = 224, con una media de edad de 9.54 años (DT= 1.25, pertenecientes a diferentes provincias argentinas. La muestra definitiva estuvo integrada por 1046 niños (n= 540 y niñas (n= 505 con un promedio de edad de 9.74 años (DT= 1.33. Luego de ser analizado según diferentes parámetros de validez y fiabilidad, el cuestionario definitivo quedó conformado por 23 ítems y cuatro dimensiones: (a alegría y gratitud (a = .92; (b serenidad (a = .75; (c simpatía (a = .64; y (d satisfacción personal (a = .71. El Alpha de Cronbach para la escala total fue de .90. Los resultados del estudio psicométrico fueron adecuados, observándose un buen poder discriminativo de los ítems, una elevada consistencia interna y una estructura factorial coherente.

Análisis comparativo de descriptores de forma 3D para detección de características faciales / Comparative analysis of 3D shape descriptors for facial feature detection

OpenAIRE

Cerón Correa, Alexander

2011-01-01

El rostro humano presenta una gran cantidad de características que actualmente pueden ser modeladas mediante un simple patrón 2D, un conjunto complejo de vértices 3D que forman una malla poligonal o un conjunto de par�ametros para cada grado de libertad o variación. La caracterización del rostro tiene gran cantidad de aplicaciones dentro de las cuales se tienen: identificación de rostros, modelado de la cara, síntesis de voz, identificación de expresiones y cirugía facial. Los modelos t...

Mundo virtual 3D e internet das coisas para motivar mudança de comportamento saudável

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Sgobbi, Fabiana

2017-06-01

Full Text Available A obesidade, atualmente, é um dos problemas mais importantes de Saúde Pública no Brasil e em diversos países no mundo porque pode ocasionar diversas doenças (cardíacas, diabetes, alteração nas taxas do colesterol e outras. O sucesso do tratamento das doenças crônicas, em especial a obesidade, depende fortemente da participação e envolvimento do indivíduo enquanto sujeito ativo de seu tratamento. O uso de mundos virtuais 3D foi estudado no presente trabalho como estratégia de apoio com vistas a oferecer ao usuário a sensação de “estar presente” num contexto especialmente preparado para promover a motivação e permitir a interação com objetos 3D. Estes elementos têm potencial para motivar e influenciar o indivíduo participante do programa. Este artigo relata um estudo que investigou o impacto da combinação de mundos virtuais 3D com Internet das Coisas e dispositivos móveis como elementos capazes de promover a motivação de sujeitos envolvidos em um programa de controle de obesidade. O trabalho foi apoiado na teoria da autodeterminação usando estratégias de motivação extrínseca, com vistas a alcançar mudança de comportamento e em consequência, ganhos em melhoria da saúde e qualidade de vida.

Competencia Digital: Uso y manejo de modelos 3D tridimensionales digitales e impresos en 3D

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Jose Luis Saorín

2017-07-01

Full Text Available El uso y manejo de modelos tridimensionales digitales no está concebido dentro de la competencia digital de los currículos de secundaria y Bachillerato. Sin embargo muchos autores relacionan la competencia digital con el manejo de modelos 3D, el modelado 3D y entornos virtuales tridimensionales (Realidad aumentada, virtual,…. En este artículo se presenta un recurso educativo para facilitar el acceso a contenidos didácticos de carácter tridimensional digital y tangible. Determinadas materias precisan de la comprensión e interpretación de conceptos volumétricos: los recursos didácticos innovadores para la edición, visualización e impresión 3D ofrecen una alternativa a las representaciones 2D en los procesos de enseñanza y aprendizaje. En este artículo se describe la creación de un catálogo escultórico que contempla versiones digitales y tangibles de modelos tridimensionales de las esculturas a través de tecnologías innovadoras de bajo coste como la visualización e impresión 3D. La prueba piloto desarrollada con 15 alumnos de bachillerato recoge una alta valoración de los participantes sobre las tecnologías empleadas.

Deploying 3D technologies for the documentation of tangible cultural heritage

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Karina Rodríguez Echavarria

2012-05-01

Full Text Available Cada vez más, los visitantes y profesionistas del patrimonio cultural esperan más de las tecnologías 3D. Es por esto que el proyecto 3D-COFORM pretende hacer que la tecnología 3D sea una realidad para el sector. El proyecto está desarrollando herramientas dirigidas a diversos tipos de usuarios y a la vez investigando sobre las cuestiones prácticas para su implementación en organizaciones de patrimonio. En esta comunicación se describe la metodología para lograr esto, así como diferentes tipos de pruebas llevadas a cabo por el proyecto. También propone tres modelos para la implementación de las tecnologías 3D y describe una de ellas con más detalle. Aunque estos resultados son preliminares, se espera que contribuyan a que el sector vea la implementación de tecnologías 3D como una opción sustentable.

Applicability of 3D-CT facial reconstruction for forensic individual identification Aplicabilidade da reconstrução facial em 3D-TC para identificação individual forense

Directory of Open Access Journals (Sweden)

Sara dos Santos Rocha

2003-03-01

Full Text Available Computed tomography (CT is used in several clinical dentistry applications even by axial slices and two and three-dimensional reconstructed images (2D-CT and 3D-CT. The purpose of the current study is to assess the precision of linear measurements made in 3D-CT using craniometric patterns for individual identification in Forensic Dentistry. Five cadaver heads were submitted to a spiral computed tomography using axial slices, and 3D-CT reconstructions were obtained by volume rendering technique with computer graphics tools. Ten (10 craniometric measurements were determined in 3D-CT images by two examiners independently, twice each, and the standard error of intra- and inter-examiner measurements was assessed. The results demonstrated a low standard error of those measurements, from 0.85% to 3.09%. In conclusion, the linear measurements obtained in osseous and soft tissue structures were considered to be precise in 3D-CT with high imaging quality and resolution.A tomografia computadorizada (TC tem sido utilizada em diversas áreas clínicas da Odontologia; utilizam-se tanto seus cortes originais quanto as reconstruções em duas e três dimensões (2D-TC e 3D-TC. O presente estudo propõe avaliar a precisão das medidas lineares realizadas na 3D-TC, utilizando a craniometria, para fins de identificação individual na Odontologia Forense. Cinco cabeças de cadáveres foram submetidas a tomografia computadorizada em espiral por meio de cortes axiais e reconstruções em 3D-TC foram obtidas por meio da técnica de volume, utilizando recursos da computação gráfica. Medidas craniométricas (n = 10 foram determinadas nas imagens em 3D-TC por dois examinadores independentemente, duas vezes cada um, e uma análise de erro padrão percentual das medidas intra- e inter-examinadores foi realizada. Os resultados demonstraram um erro padrão percentual baixo apresentado por essas medidas, variando entre 0,85% e 3,09%. Em conclusão, as medidas lineares

d_21 system: un juego para ser habitado

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Reyes, J. M.

2008-12-01

Full Text Available d21_system is a prototype for a convertible room built with compatible construction component systems. It consists in: 1- a catalogue of massproduced, fully equipped booths. 2- a bolted steel structure with identical and standardized staircase sections. 3- a wood structure comprising four different frames compatible with the steel structure. 4- three service systems with a fi xed layout where the booths, as well as lighting and all the electrical outlets needed, can be plugged in. 5- wheeled cabinets and sliding panels to divide different areas and uses. These "open meccanos" take their inspiration from the application of "open industrialization" processes. d21_system was set up, in just two weeks’ time, in the central courtyard at the Madrid fairgrounds for the CONSTRUTEC’04 event.d21_system es un prototipo de habitación transformable construido a base de S.3c (sistemas de construcción por componentes compatibles que consiste en: 1- un catalogo de cabinas producidas en serie. Totalmente equipadas2- una estructura de acero atornillada con sus tramos de escalera idénticos y normalizados3- una estructura de madera compuesta de 4 marcas distintas compatible con la estructura de acero4- tres redes de instalaciones capaces de enchufar- desenchufar en su trazado fi jo tanto las cabinas equipadas, como los focos y enchufes de corriente eléctrica que se necesiten5- armarios- rodantes y paneles deslizantes para dividir y separar las diferentes zonas de usos. La aplicación de los procesos pertenecientes a "la industrialización abierta" es lo que permite pensar en esta clase de "mecanos abiertos". d21_system fue montado en el patio central de IFEMA para el certamen CONSTRUTEC`o4 y se montó en tan sólo 15 días.

Are 3-D Movies Bad for Your Eyes?

Medline Plus

Full Text Available ... Sections Are 3-D Movies Bad for Your Eyes? Leer en Español: ¿Son Malas para los Ojos ... if any, effect the technology has on your eyes. Is 3-D technology healthy for your or ...

Computer system to manage information rigs by 3D electronic models; Sistema computacional para administrar la informacion de plataformas petroleras mediante modelos electronicos 3D

Energy Technology Data Exchange (ETDEWEB)

Vazquez Bustos, Jesus; Segura Ozuna, Victor Octavio [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

2012-06-22

The evolution and incorporation of new hardware technologies, as well as recent advances in computer systems have enabled the development of applications of computer aided design of most complete scope, such as those used for the design of industrial process plants. This article describes a software system developed to complement the capabilities of one of these systems for the design of process plants. A 3D electronic model is generated through the user interface of the design system that at the same time gives the user the ability to generate, publish, review and control the engineering document that are generated during the entire life cycle of a marine oil platform, a very particular type of industrial process plant. This way, the user obtains not only a tool for the design of an industrial plant, but also a system for managing information and engineering documents that are developed. This allows the user to do a more efficient job by putting at his disposal and in the same system, all documents and information required to perform his duty. [Spanish] La evolucion e incorporacion de nuevas tecnologias de hardware, junto con los avances recientes en sistemas de computo ha permitido el desarrollo de aplicaciones de interesante diseno de computo de mayor alcance, tales como los que se emplean en las plantas de procesos industriales. Este articulo describe un sistema de software desarrollado para complementar las capacidades de uno de estos sistemas para el diseno de proceso. Un modelo electronico se genera por medio de la interfaz de usuario del sistema de diseno, que al mismo tiempo da al usuario la capacidad para crear, publicar, revisar y controlar los documentos de ingenieria que se producen durante el ciclo de vida completo de una plataforma marina petrolera, un tipo muy particular de planta de proceso industrial. De este modo, el usuario no solo obtiene una herramienta para el diseno de una planta industrial, sino tambien un sistema para manejar informacion y

Conciencia pedagógica: Una oportunidad para aprender

OpenAIRE

Badilla Zamora, Isabel; Ramírez García, Anthia; Rojas Acevedo, Kattia

2016-01-01

La investigación aborda el tema de la conciencia pedagógica: sentir, pensar y hacer en el marco de la práctica profesional docente desarrolladas en la División de Educación Básica (DEB) de la Universidad Nacional de Costa Rica. Se concibe que el aprendizaje no sólo se produce a nivel conceptual, procedimental y actitudinal, sino que es complementado por la conciencia pedagógica. La investigación se basa en una unidad didáctica conformada por estrategias para la acción reflexión, aplicada en e...

Desarrollo de herramientas de procesado y visualización para audio 3D con auriculares

OpenAIRE

Magro Sastre, Julio

2016-01-01

La Auralización o “realidad virtual acústica” es un término relativamente nuevo. Integra métodos de la física y la ingeniería acústica con la teoría de la Psicoacústica y de reproducción electroacústica [1]. El término Auralización es el análogo de la técnica de “visualización” en video 3D para el audio. En este Proyecto Fin de Carrera se describe el proceso de visualizar ciertas características, efectos o señales del sonido. Los sistemas estéreo convencionales son capaces de posicionar la im...

Competencia Digital: Uso y manejo de modelos 3D tridimensionales digitales e impresos en 3D

OpenAIRE

Jose Luis Saorín; Cecile Meier; Jorge de la Torre-Cantero; Carlos Carbonell-Carrera; Dámari Melián-Díaz; Alejandro Bonnet de León

2017-01-01

El uso y manejo de modelos tridimensionales digitales no está concebido dentro de la competencia digital de los currículos de secundaria y Bachillerato. Sin embargo muchos autores relacionan la competencia digital con el manejo de modelos 3D, el modelado 3D y entornos virtuales tridimensionales (Realidad aumentada, virtual,…). En este artículo se presenta un recurso educativo para facilitar el acceso a contenidos didácticos de carácter tridimensional digital y tangible. Determinadas materias ...

Advantages and disadvantages of using non-coplanar techniques in radiotherapy of the abdomen formed 3D; Ventajas e inconvenientes del uso de tecnicas con coplanares en radiaoterpia 3D conformada de abdomen

Energy Technology Data Exchange (ETDEWEB)

Urena Llinares, A.; Castro Ramirez, I.; Iborra Oquendo, M. A; Quinones Rodriguez, L. A.; Angulo Pain, E.

2011-07-01

3D Radiotherapy locations abdomen, especially in pancreas and stomach cancers is often extremely difficult if we are to meet the dose constraints to organs at risk due to proximity and many of these (liver, kidneys, intestines, lungs, bone. ..). Of these, the most critical are the kidneys, which also present values of tolerance, in most cases difficult to meet. This is done in our hospital are using non-coplanar techniques performing well both as coating PTV dose to both kidneys.

Programación de gráficos 3D con Mathematica, DrawGraphics, CurvesGraphics, LiveGraphics3D y JavaView

OpenAIRE

Mora Flores, Walter; Instituto Tecnológico de Costa Rica; Figueroa, Geovanni; Instituto Tecnológico de Costa Rica

2015-01-01

Se muestra como integrar las herramientas: Mathematica (y los paquetes DrawGraphics y CurvesGraphics), LiveGraphics3D, JavaView y html, para crear algunas figuras 3D las cuales se pueden incrustar en páginas Web independientes y con posibilidad de interacción.

Las cooperativas como estrategia de gestión para el fomento de la economía social en el municipio Maracaibo del estado Zulia. Período: 1999-2006

OpenAIRE

Graterol, Angela; Alizo, María Alexandra; Molero, Norma

2010-01-01

La presente investigación tuvo como objetivo analizar las cooperativas como estrategias de gestión para el fomento de la economía social. Se enmarca en el paradigma positivista, de carácter descriptiva analítica y el diseño es no experimental- transeccional. La muestra estuvo conformada por dos mil doscientos cuarenta y dos socios de cooperativas del municipio Maracaibo, registradas en la superintendencia nacional de cooperativas (SUNACOOP). Se utilizaron fuentes primarias y secundarias para ...

Estrategias para el desarrollo de contenido educativo 3D: Producción de animaciones modeladas por ordenador utilizando software libre

Directory of Open Access Journals (Sweden)

Estéfano Vizconde Veraszto

2012-01-01

Full Text Available Este artículo presenta los resultados preliminares de la utilización de herramientas computacionales orientadas hacia el desarrollo de contenido 3D, en particular para la educación, en una Institución de Educación Superior en la ciudad de Mogi Guaçu/SP/Brasil, la Faculdade Municipal “Professor Franco Montoro”. Para ello, tenemos la intención de utilizar un conjunto de herramientas basadas en software libre, de calidad excelente y con un gran potencial para el desarrollo de las aplicaciones propuestas. Como primer resultado de este proyecto, se presentan los resultados de un experimento donde los estudiantes del curso de  Graduación en Ciéncias Informáticas han desarrollado una serie de animaciones modeladas por ordenador con la utilización de software libre. En este contexto, se prevé la creación de nuevas "células" para el desarrollo de animaciones y simulaciones con la participación de los alumnos interesados en este ámbito profesional, ya sean profesionales actuantes en el área de computación, o no.

Efectividad del Programa Educativo Desarrollando Habilidades con Estimulación Temprana para Mejorar el Nivel de Conocimientos, Actitudes y Prácticas en Madres con Niños de 2 a 5 Años de la I.E.I Nº 143, La Era, Lima 2008.

OpenAIRE

Flores Dávila, Celina Del Carmen; Muñoz Hilasaca, Gloria Pilar

2015-01-01

Objetivo. Determinar la efectividad del programa educativo Desarrollando Mis Habilidades con Estimula- ción Temprana para mejorar el nivel de conocimientos, actitudes y prácticas sobre estimulación temprana en madres con niños de 2 a 5 años de la I.E.I. Nº 143, La Era-Ñaña, Lima-Perú,2008. Metodología de tipo Pre- Experimental. La población estuvo conformada por un grupo de madres a quienes se les aplicó el pre y post test de conocimientos, actitudes y prácticas sobre estimulación temprana. D...

¿Es equivalente la suplementación diaria con vitamina D2 o vitamina D3 en adultos mayores?

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Mariana Seijo

2012-06-01

Full Text Available Tanto la equivalencia entre colecalciferol (D3 y ergocalciferol (D2, como las dosis y forma de administración de ambos, son actualmente un tema controvertido. El objetivo de este estudio fue comparar la efectividad de 800 UI/día de D2 (gotas y D3 (comprimidos para alcanzar niveles adecuados de 25 hidroxivitamina D (25OHD (= 30 ng/ml. Veintiún mujeres posmenopáusicas que vivían en la Ciudad de Buenos Aires, edad promedio ( ± DS 77.1 ± 6.8 años fueron incluidas y asignadas en forma aleatoria a uno de los siguientes grupos: GD2 (n = 13: 800 UI (gotas y GD3 (n = 8: 800 UI (comprimidos. Se midió 25OHD sérica (RIA-DIASORIN basal y a los 7, 28 y 45 días del estudio. Basalmente, 19 de las 21 mujeres presentaron niveles de deficiencia de 25(OHD (< 20 ng/ml: GD2: 14.0 ± 4.8 y GD3: 13.2 ± 4.9 (NS. Se observó en el día 7 un incremento del ~25% solo en GD3 y un aumento significativo al final del estudio en ambos grupos, sin alcanzar los valores adecuados de 25OHD (GD2: 17.4 ± 5.5 vs. GD3:22.9 ± 4.6 ng/ml p < 0.001. La administración por 45 días de 800 UI de vitamina D3 fue más efectiva que D2 para incrementar los niveles de 25OHD, aunque ambas fueron insuficientes para alcanzar niveles adecuados de 25OHD (= 30 ng/ml.

Desarrollo de una escala para medir las áreas sensible, racional y moral en estudiantes universitarios

OpenAIRE

Álvarez-Izazaga, Marsela Alejandra; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (México); Roldán-Amaro, José Antonio; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (México); Reidl-Martínez, Lucy María; Universidad Nacional Autónoma de México

2015-01-01

El objetivo del estudio fue evaluar la efectividad de la Escala Tridimensional de la Toma de Decisiones en la Vida Cotidiana (ETDVC) para medir las características conductuales en tres áreas: sensible, racional y moral. La muestra estuvo conformada por 646 estudiantes de las carreras de Filosofía, Teología, Ciencias y Artes Plásticas en universidades de la Ciudad de México, de los cuales 261 son mujeres y 385 hombres, la edad promedio fue de 22,5 años. El instrumento final está conformado por...

Estado actual de fruticultura colombiana y perspectivas para su desarrollo

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Diego Miranda Lasprilla

2011-10-01

Full Text Available La horticultura en Colombia comprende las áreas de floricultura, fruticultura, olerícultura, producción de plantas aromáticas y medicinales y la horticultura urbana. La promoción y desarrollo del sector frutícola representa para Colombia una importante fuente de crecimiento de la agricultura, de generación de empleo rural y de desarrollo con equidad para las distintas regiones puesto que las frutas pueden asentarse en los diversos pisos térmicos de que dispone el país, a la vez que conforma una producción administrada con criterios de eficiencia y sostenibilidad en escalas que van desde micro, pequeños y medianos productores hasta grandes productores y empresas. Durante las últimas cuatro décadas el área sembrada en frutas expresa una dinámica de constante crecimiento, consiguiendo así aumentar su participación tanto en el área dedicada a cultivos no transables, como en el total del área de la agricultura sin café. Así, mientras en 1970 la participación del área frutícola en los no transables era del 1,6%, en el 2005 ésta era del 12,6%. Las áreas plantadas en frutas en Colombia pasaron de 191.035 ha en 2003 a 225.325 ha en 2007 lo que representa un crecimiento de 17,9 %, mientras que los volúmenes de producción pasaron de 2.675.736 t a 3.279.264 t en el mismo período en 47 especies frutícolas. El Plan Frutícola Nacional - PFN, constituye una propuesta estratégica conformada por conjunto coherente de objetivos, estrategias y programas que, con base en una visión de futuro, buscan la meta inicial de duplicar el área de la producción frutícola nacional, asegurar las condiciones tecnológicas y de innovación para una producción sostenible y de calidad, agregar valor en la cadena frutícola, y lograr una vinculación plena en los mercados internacionales. Se busca que los participantes conozcan los principales desarrollos de la fruticultura Colombiana, sus retos y oportunidades para la próxima década.

HyperCAL3D, uma ferramenta computacional para o apoio do processo de ensino-aprendizagem de geometria descritiva

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Fábio Gonçalves Teixeira

2013-12-01

Full Text Available Este trabalho apresenta o HyperCAL3D, um aplicativo de apoio ao ensino de Geometria Descritiva, através do estudo de objetos sólidos. São descritas a metodologia utilizada para a sua implementação e as principais funcionalidades do aplicativo. Foi realizada uma seleção de conceitos a fim de determinar a estrutura funcional que o software deveria atender. A partir disso, foram modeladas as principais funcionalidades através de processos de Geometria vetorial equivalentes aos utilizados na Geometria Descritiva. Dentre as principais funcionalidades apresentadas destacam-se: o processo de projeção, a representação de linhas ocultas no modelo tridimensional e nas projeções, vistas auxiliares sucessivas em tempo real e em 3D, representação em épura e o processo de interseção. Todas estas ferramentas são implementadas em um aplicativo que auxilia o processo de aprendizagem dos alunos e os procedimentos didáticos dos professores.

Upper limit for the D2H+ ortho-to-para ratio in the prestellar core 16293E (CHESS)

Science.gov (United States)

Vastel, C.; Caselli, P.; Ceccarelli, C.; Bacmann, A.; Lis, D. C.; Caux, E.; Codella, C.; Beckwith, J. A.; Ridley, T.

2012-11-01

The H_3^+ ion plays a key role in the chemistry of dense interstellar gas clouds where stars and planets are forming. The low temperatures and high extinctions of such clouds make direct observations of H_3^+ impossible, but lead to large abundances of H2D+ and D2H+, which are very useful probes of the early stages of star and planet formation. The ground-state rotational ortho-D2H+ 11,1-00,0 transition at 1476.6 GHz in the prestellar core 16293E has been searched for with the Herschel HIFI instrument, within the CHESS (Chemical HErschel Surveys of Star forming regions) Key Program. The line has not been detected at the 21 mK km s-1 level (3σ integrated line intensity). We used the ortho-H2D+ 11,0-11,1 transition and para-D2H+ 11,0-10,1 transition detected in this source to determine an upper limit on the ortho-to-para D2H+ ratio as well as the para-D2H+/ortho-H2D+ ratio from a non-local thermodynamic equilibrium analysis. The comparison between our chemical modeling and the observations suggests that the CO depletion must be high (larger than 100), with a density between 5 × 105 and 106 cm-3. Also the upper limit on the ortho-D2H+ line is consistent with a low gas temperature (~11 K) with a ortho-to-para ratio of 6 to 9, i.e. 2 to 3 times higher than the value estimated from the chemical modeling, making it impossible to detect this high frequency transition with the present state of the art receivers. The chemical network is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/547/A33Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

Aplicação de medidas cefalométricas em 3D-TC: Application of cephalometric measurements in 3D-TC

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Patrícia de Medeiros Loureiro Lopes

2007-01-01

Full Text Available OBJETIVO: o objetivo desta pesquisa foi avaliar a precisão e acurácia (validade de medidas cefalométricas lineares em imagens reconstruídas em terceira dimensão (3D, pela técnica de volume, a partir da tomografia computadorizada (TC multislice. METODOLOGIA: o material da pesquisa consistiu de 10 (dez crânios secos, previamente selecionados, sem distinção de etnia ou gênero, os quais foram submetidos à TC multislice 16 cortes com 0,5mm de espessura por 0,3mm de intervalo de reconstrução. Posteriormente, os dados obtidos foram enviados para uma estação de trabalho independente, contendo o programa Vitrea®. Os pontos cefalométricos (n=13 foram localizados e as respectivas medidas ósseas lineares (n=15 foram realizadas por 2 examinadores, previamente treinados, medindo cada um duas vezes, independentemente, em 3D. As medidas físicas foram obtidas por um terceiro examinador, utilizando um paquímetro digital. A análise dos dados foi realizada mediante um estudo comparativo entre as medidas inter e intra-examinadores, em 3D-TC, e entre estas e as medidas físicas obtidas diretamente nos crânios, utilizando ANOVA (análise de variância. RESULTADOS: não foram encontradas diferenças estatisticamente significantes entre os valores das medidas inter e intra-examinadores, nem entre as medidas físicas e em 3D, com p>0,6 para todas as medidas. O erro percentual foi de 2,05% para as medidas interexaminadores e de 2,11% para as medidas intra-examinadores. A média do erro percentual entre as medidas físicas e em 3D variou de 0,96% a 1,47%. CONCLUSÃO: todas as medidas cefalométricas lineares foram consideradas precisas e acuradas utilizando a técnica de volume em 3D por meio da TC multislice.AIM: To test the precision and accuracy of conventional linear cephalometric measurements in 3D reconstructed images using a multislice CT. METHODS: The study population consisted of 10 dry skulls, previously selected, without distinction of

Algoritmo evolucionário para otimização do plano de tratamento em radioterapia conformal 3D

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Marco César Goldbarg

2009-08-01

Full Text Available O planejamento do tratamento por radioterapia tem por objetivo atingir um volume alvo com altas doses de radiação tomando cuidado para não expor órgãos sadios a doses elevadas. É, portanto, muito importante que se encontre um balanço ideal entre esses objetivos conflitantes. O presente trabalho relata um modelo de programação matemática multiobjetivo e introduz um Algoritmo Transgenético para o problema de seleção do direcionamento dos feixes de radiação no planejamento em radioterapia conformal 3D. A seleção das direções dos feixes é feita através de uma técnica denominada de isocentros variáveis. Com a finalidade de testar o potencial do algoritmo desenvolvido, realiza-se um experimento comparativo com um Algoritmo Genético Multiobjetivo. O experimento computacional obtém dados quantitativos e qualitativos que são analisados no trabalho.The radiotherapy treatment planning aims to achieve a target volume with high doses of radiation taking care not to expose healthy organs to high doses. It is therefore very important to find an optimal balance between these conflicting goals. This paper reports a mathematical model of multiobjective programming and presents a Transgenetic Algorithm for the problem of selecting the direction of radiation beams in 3D conformal radiotherapy planning. The selection of beams directions is done with a technique called variable isocenters. In order to test the potential of the developed algorithm, a comparative experiment with a multiobjective genetic algorithm was done. The computational experiment obtains quantitative and qualitative data that are analyzed in this paper.

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

OpenAIRE

Irene Paima; Edwin Zevallos

2012-01-01

Los conocimientos y percepciones sobre los alimentos ingeridos en la gestación tienen una vital importancia porque dependiendo de una buena alimentación en esta etapa, periodo en el que se incrementan notablemente las necesidades nutritivas para el beneficio del binomio madre – feto, será de mayor ayuda para prevenir en cada nueva gestación un déficit nutricional. Se realizó un estudio de descriptivo y transversal, la población estuvo conformada por todas las gestantes que acudieron al servic...

New tools for subsurface imaging of 3D seismic Node data in hydrocarbon exploration =

Science.gov (United States)

Benazzouz, Omar

A aquisicao de dados sismicos de reflexao multicanal 3D/4D usando Ocean Bottom NODES de 4 componentes constitui atualmente um sector de importancia crescente no mercado da aquisicao de dados reflexao sismica marinha na industria petrolifera. Este tipo de dados permite obter imagens de sub-superficie de alta qualidade, com baixos niveis de ruido, banda larga, boa iluminacao azimutal, offsets longos, elevada resolucao e aquisicao de tanto ondas P como S. A aquisicao de dados e altamente repetitiva e portanto ideal para campanhas 4D. No entanto, existem diferencas significativas na geometria de aquisicao e amostragem do campo de ondas relativamente aos metodos convencionais com streamers rebocados a superficie, pelo que e necessario desenvolver de novas ferramentas para o processamento deste tipo de dados. Esta tese investiga tres aspectos do processamento de dados de OBSs/NODES ainda nao totalmente resolvidos de forma satisfatoria: a deriva aleatoria dos relogios internos, o posicionamento de precisao dos OBSs e a implementacao de algoritmos de migracao prestack 3D em profundidade eficientes para obtencao de imagens precisas de subsuperficie. Foram desenvolvidos novos procedimentos para resolver estas situacoes, que foram aplicados a dados sinteticos e a dados reais. Foi desenvolvido um novo metodo para deteccao e correccao de deriva aleatoria dos relogios internos, usando derivadas de ordem elevada. Foi ainda desenvolvido um novo metodo de posicionamento de precisao de OBSs usando multilateracao e foram criadas ferramentas de interpolacao/extrapolacao dos modelos de velocidades 3D de forma a cobrirem a extensao total area de aquisicao. Foram implementados algoritmos robustos de filtragem para preparar o campo de velocidades para o tracado de raios e minimizar os artefactos na migracao Krichhoff pre-stack 3D em profundidade. Os resultados obtidos mostram um melhoramento significativo em todas as situacoes analisadas. Foi desenvolvido o software necessario para o

Are 3-D Movies Bad for Your Eyes?

Medline Plus

Full Text Available ... Tips & Prevention News Ask an Ophthalmologist Patient Stories Español Eye Health / Tips & Prevention Sections Are 3-D Movies Bad for Your Eyes? Leer en Español: ¿Son Malas para los Ojos las Películas en ...

USO DE UN SOFTWARE DE EVALUACIÓN DEL APRENDIZAJE PARA MEJORAR LOS RESULTADOS ACADÉMICOS

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Carlos Antonio Li Loo Kung

2012-06-01

Full Text Available La investigación tuvo como objetivo: Aplicar un software de evaluación del aprendizaje para mejorar los resultados académicos en estudiantes, de la Facultad de Industrias Alimentarias de la Universidad Nacional de la Amazonía Peruana, Iquitos en el año 2011. El estudio pertenece al tipo experimental y el diseño fue el pre-experimental de tipo pre-test y post-test con un solo grupo. La población estuvo conformada por los estudiantes de la Escuela de Ingeniería en Industrias Alimentarias, de la Universidad Nacional de la Amazonia Peruana que fueron 205, la determinación de la muestra fue en forma no probabilística intencional conformada por 62 estudiantes. La técnica que se empleó en la recolección de los datos fue: la encuesta. El instrumento fue el cuestionario. Para el análisis e interpretación de los datos se empleó la estadística descriptiva: frecuencia, promedios simples, porcentaje y la estadística inferencial no paramétrica Chi-cuadrado (X2, obteniendo X2c = 69,04; X2t = 9,21; es decir como X2c>X2t , gl = 2, µ = 0,01; aceptando la hipótesis de investigación: “El software de evaluación de los aprendizajes ayudará a mejorar la obtención de resultados académicos de estudiantes, en la Facultad de Industrias Alimentarias de la Universidad Nacional de la Amazonía Peruana, durante el año 2011”.

USO DE UN SOFTWARE DE EVALUACIÓN DEL APRENDIZAJE PARA MEJORAR LOS RESULTADOS ACADÉMICOS

Directory of Open Access Journals (Sweden)

Carlos Antonio Li Loo Kung

2012-06-01

Full Text Available La investigación tuvo como objetivo: Aplicar un software de evaluación del aprendizaje para mejorar los resultados académicos en estudiantes, de la Facultad de Industrias Alimentarias de la Universidad Nacional de la Amazonía Peruana, Iquitos en el año 2011. El estudio pertenece al tipo experimental y el diseño fue el pre-experimental de tipo pre-test y post-test con un solo grupo. La población estuvo conformada por los estudiantes de la Escuela de Ingeniería en Industrias Alimentarias, de la Universidad Nacional de la Amazonia Peruana que fueron 205, la determinación de la muestra fue en forma no probabilística intencional conformada por 62 estudiantes. La técnica que se  empleó en la recolección de los datos fue: la encuesta. El instrumento fue el cuestionario. Para el análisis e interpretación de los datos se empleó la estadística descriptiva: frecuencia, promedios simples, porcentaje y la estadística inferencial no paramétrica Chi-cuadrado (X2, obteniendo X2c = 69,04; X2t = 9,21; es decir como X2c>X2t , gl = 2, µ = 0,01; aceptando la hipótesis de investigación: “El software de evaluación de los aprendizajes ayudará a mejorar la obtención de resultados académicos de estudiantes, en la Facultad de Industrias Alimentarias de la Universidad Nacional de la Amazonía Peruana, durante el año 2011”.

Relleno de huecos en mallas 3D completas mediante algoritmos de restauración de imagen

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Emiliano Pérez Hernàndez

2012-10-01

Full Text Available Resumen: En este artículo se propone un método para rellenar huecos en objetos 3D. La idea principal es la de utilizar un algoritmo de restauración de imágenes para reconstruir las partes que se han de completar. Para ello es necesario hacer una transformación de los datos de la superficie 3D en datos de imagen 2D. Por tanto, el algoritmo propuesto parte de una etapa inicial de identificación de huecos. A continuación se hace la selección, para cada hueco, de una porción de malla representativa. Seguidamente se calcula el punto de vista o plano de proyección adecuado para obtener una imagen de rango de esa porción de malla. A la imagen de rango obtenida se le aplica el algoritmo de restauración de imagen. Finalmente, se aplica una transformación inversa 2D a 3D y se integra el éresultado con la malla inicial. Se trata de un algoritmo robusto, válido para diversos tipos de huecos y diferentes tamaños de los mismos. Abstract: In this work a method for filling holes in 3D meshes based on a 2D image restoration algorithm is expounded. To do that, data must be converted to a suitable input format, a 3D to 2D transformation is executed by projecting the 3D surface onto a grid. Therefore, the proposed algorithm starts by a first stage of holes identification. Then, a meaningful mesh portiéon is choosen for each hole. Afterward, the suitable plane of projection must be computed to get the range image of the mesh portion. Later, it is applied the restauration image algorithm to the range image. Finally, an inverse transformation 2D to 3D is performed and the new produced data are integrated with the initial mesh. The result is a robust algorithm which works correctly with several kind of holes and for di_erent sizes of them. Palabras clave: visión por computador, gráficos por computador, imágenes digitales, imágenes de rango, restauración de imágenes, Keywords: computer vision, computer graphics, digital images, range images

Uso de un videojuego inmersivo 3D para el aprendizaje del español: El caso de "Lost in La Mancha"

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David Maniega Legarda

2011-05-01

Full Text Available Perdido en La Mancha (Lost in La Mancha consiste en la creación de un videojuego educativo e inmersivo online (Serious Game para el aprendizaje del español orientado a hablantes anglosajones. Dentro del entorno inmersivo del videojuego, el protagonista Collin debe adquirir el conocimiento necesario de español para poder sobrevivir en un remoto pueblo de La Mancha, de ahí su nombre “Perdido en La Mancha”. La base del proyecto subyace en un curso de español en línea basado en un videojuego inmersivo 3D, accesible a través de web y de dispositivos móviles (telefonía de última generación, PDA, iPods, Tablet Pc, etc.. El contenido del curso está creado según el plan curricular del Instituto Cervantes correspondiente al Nivel A1 (equivalente con la certificación internacional E/LE.

Desarrollo de un videojuego para móviles con Unity o Cocos2d-x

OpenAIRE

Egea Canales, José María

2016-01-01

Los dispositivos móviles se han convertido en una de las principales plataformas para videojuegos. Una de las principales problemáticas al desarrollar aplicaciones para estos dispositivos es la alta fragmentación que existe en cuanto a sistemas operativos y características de la interfaz. Existen determinadas librerías y herramientas como Unity 3D dirigidas a resolver este problema, permitiendo desarrollar videojuegos que puedan ser portados a las principales plataformas móviles existentes....

Estrategias de gestión de la inteligencia emocional para la prevención del Sindrome de Burnout en docentes de aula

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Pablo Torres

2016-01-01

Full Text Available Este trabajo tiene como finalidad proponer estrategias para la prevención del Síndrome de Burnout en docentes de aula, mediante la estimulación de la inteligencia emocional. El tipo de investigación es de naturaleza proyectiva, cuyo diseño es documental - contemporáneo. Como resultado se obtuvo una propuesta conformada por tres fases de ejecución secuencial, las cuáles contienen una serie de competencias, y de estrategias para su estimulación. En conclusión, un educador que tenga la capacidad de autoconciencia, que sepa gestionar positivamente sus emociones, y que pueda automotivarse, tendrá mayor calidad de vida y bienestar, y, por ende, su desempeño será más exitoso.

An approach to 3D modeling of marine platforms in operation; Un enfoque al modelado 3D de plataformas marinas en operacion

Energy Technology Data Exchange (ETDEWEB)

Gomez Camargo, Octavio [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

2007-07-01

During the useful life of the marine platforms it is of great importance to have an intelligent three-dimensional model, that faithfully represents the facilities, in order to optimize the operative and maintenance procedures as well as to have a real information of the condition of the equipment and of each one of the components to facilitate the decision making, to make a risk analysis and dangerous operation analyses (HAZOP) and to make designs of improvements, modernization, substitutions and extensions. At the moment, the marine platforms are being designed with CAD tools, reason why before its installation they have a 3D model, which is updated as the design advances, until arriving at the approved version for construction. Later, the digital model of the marine platform serves to guide in the construction and follow up the advance of the same. Similarly, the model 3D is due to update with respect to the changes that arise during the construction and installation, until the commissioning of the platform, nevertheless, many of these were constructed when these tools were not yet available, reason why it becomes necessary to construct the digital model according to the present condition they exhibit. In order to develop the digital model of the marine platforms in operation, the activities are grouped in three large stages: specification of scope, retrieval of the information and modeling. [Spanish] Durante la vida util de las plataformas marinas es de gran importancia contar con un modelo tridimensional inteligente, que represente fielmente las instalaciones, con la finalidad de optimizar los procedimientos operativos y de mantenimiento asi como de disponer de informacion real del estado de los equipos y de cada uno de los componentes para facilitar la toma de decisiones, para hacer analisis de riesgos y analisis de operaciones peligrosas (HAZOP) y para hacer disenos de mejoras, modernizaciones, sustituciones y ampliaciones. Actualmente, las plataformas

Reconstrucción 3D usando superficies trianguladas dados contornos paralelos

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Manuel Guillermo Forero

2001-07-01

Full Text Available El presente artículo muestra una técnica de triangulación empleada para la reconstrucción de superficies tridimensionales (3D a partir de contornos paralelos. Esta técnica es usada para el modelamiento de la cabeza y el cerebro a partir de imágenes de resonancia magnética (IRM.

Análisis de relevancia de descriptores de forma para el reconocimiento de gestos faciales en imágenes 3D

OpenAIRE

Rodríguez Acevedo, Julián Severiano

2012-01-01

Actualmente existe un creciente interés por estudiar técnicas basadas en visión artificial y computación gráfica para caracterizar el rostro humano, con el fin de realizar antropometría facial, reconocimiento e identificación de personas y sistemas de interacción hombre - máquina. Gracias a los métodos actuales es posible tener modelos 3D del rostro que permiten sacar provecho de la gran cantidad de información geométrica que tiene el rostro. Esta información es obtenida frecuentemente me...

3DPublish: solución web para crear museos virtuales 3D dinámicos

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P. Aguirrezabal

2012-11-01

aplicación 3DPublish que representa una alternativa a estas 2 soluciones estáticas ya que ofrece la posibilidad de gestionar dinámicamente un escenario 3D (real o virtual y las obras de arte que componen la exposición. 3DPublish proporciona además al usuario una experiencia realista a través de diferentes exposiciones, usando métodos que añaden valor como los visitas virtuales guiadas o la técnica de storytelling. 3DPublish facilitará las tareas diarias de los comisarios de los museos y mejorará el resultado final de las exposiciones de los muesos virtuales en 3D. Este artículo presentará también el caso de aplicación de la Sala Kubo en San Sebastián (ESPAÑA como ejemplo de un caso de uso de 3DPublish.

Vitamina D y cáncer: acción antineoplásica de la 1α, 25(OH2 -vitamina D3 Vitamin D and cancer: antineoplastic effects of 1α,25(OH2-vitamin D3

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Verónica González Pardo

2012-04-01

Full Text Available La forma hormonalmente activa de la vitamina D, 1α,25(OH2-vitamina D3 (1α,25(OH2D3, además de desempeñar un rol crucial en el mantenimiento de la homeostasis de calcio en el cuerpo, también regula el crecimiento y la diferenciación de diferentes tipos celulares, incluyendo células cancerosas. Actualmente hay numerosos estudios que investigan los efectos de la hormona en estas células, debido al interés en el uso terapéutico del 1α,25(OH2D3 y de análogos con menor actividad calcémica para el tratamiento o prevención del cáncer. En este trabajo de revisión se describe el sistema endocrino de la vitamina D, su mecanismo de acción, su acción antineoplásica y se provee información sobre los últimos avances en el estudio de nuevos análogos de la hormona con menos actividad calcémica para el tratamiento del cáncer.The hormonal form of vitamin D, 1α,25(OH2-vitamin D3 (1α,25(OH2D3, in addition of playing a central role in the control of calcium homeostasis in the body, regulates the growth and differentiation of different cell types, including cancer cells. At present several epidemiologic and clinical studies investigate the effect of the hormone in these cells due to the interest in the therapeutic use of 1α,25(OH2D3 and analogues with less calcemic activity for prevention or treatment of cancer. This review describes vitamin D endocrine system, its mechanism of action, its antineoplastic activity and provides information about the latest advances in the study of new hormone analogues with less calcemic activity for cancer treatment.

Experimental study of para- and ortho-H3+ recombination

International Nuclear Information System (INIS)

Plasil, R; Varju, J; Hejduk, M; Dohnal, P; KotrIk, T; Glosik, J

2011-01-01

Recombination of H 3 + with electrons is a key process for many plasmatic environments. Recent experiments on storage ring devices used ion sources producing H 3 + with enhanced populations of H 3 + ions in the para nuclear spin configuration to shed light on the theoretically predicted faster recombination of para states. Although increased recombination rates were observed, no in situ characterization of recombining ions was performed. We present a state selective recombination study of para- and ortho-H 3 + ions with electrons at 77 K in afterglow plasma in a He/Ar/H 2 gas-mixture. Both spin configurations of H 3 + have been observed in situ with a near infrared cavity ring down spectrometer (NIR-CRDS) using the two lowest energy levels of H 3 + . Using hydrogen with an enhanced population of H 2 molecules in para states allowed us to influence the [para-H 3 + ]/[ortho-H 3 + ] ratio in the discharge and in the afterglow. We observed an increase in the measured effective recombination rate coefficients with the increase of the fraction of para-H 3 + . Measurements with different fractions of para-H 3 + at otherwise identical conditions allowed us to determine the binary recombination rate coefficients for pure para-H 3 + p α bin (77 K) = (2.0±0.4)x10 -7 cm 3 s -1 and pure ortho-H 3 + o α bin (77 K) = (4±3)x10 -8 cm 3 s -1 .

Experimental study of para- and ortho-H3+ recombination

Science.gov (United States)

Plašil, R.; Varju, J.; Hejduk, M.; Dohnal, P.; Kotrík, T.; Glosík, J.

2011-07-01

Recombination of H3+ with electrons is a key process for many plasmatic environments. Recent experiments on storage ring devices used ion sources producing H3+ with enhanced populations of H3+ ions in the para nuclear spin configuration to shed light on the theoretically predicted faster recombination of para states. Although increased recombination rates were observed, no in situ characterization of recombining ions was performed. We present a state selective recombination study of para- and ortho-H3+ ions with electrons at 77 K in afterglow plasma in a He/Ar/H2 gas-mixture. Both spin configurations of H3+ have been observed in situ with a near infrared cavity ring down spectrometer (NIR-CRDS) using the two lowest energy levels of H3+. Using hydrogen with an enhanced population of H2 molecules in para states allowed us to influence the [para-H3+]/[ortho-H3+] ratio in the discharge and in the afterglow. We observed an increase in the measured effective recombination rate coefficients with the increase of the fraction of para-H3+. Measurements with different fractions of para-H3+ at otherwise identical conditions allowed us to determine the binary recombination rate coefficients for pure para-H3+ pαbin(77 K) = (2.0±0.4)×10-7 cm3s-1 and pure ortho-H3+ oαbin(77 K) = (4±3)×10-8 cm3s-1.

Diseño, integración y experimentación de un sistema 3D de navegación para personas invidentes

OpenAIRE

Santiago Praderas, Víctor Manuel

2012-01-01

La presente tesis refleja el trabajo de investigación y de integración llevado a cabo durante los últimos años con el propósito de aplicar los avances tecnológicos al mundo de las personas invidentes. A principio de la década del 2000, se llevaron a cabo numerosas reuniones y encuentros entre diferentes científicos para compartir opiniones acerca de las ayudas existentes para invidentes. Las que había, estaban muy enfocadas hacia personas de baja visión, pero no había casi nada para personas ...

ANÁLISE QUALITATIVA DE SÓLIDOS ELASTOPLÁSTICOS SOB DEFORMAÇÃO FINITA UTILIZANDO ELEMENTOS DE BARRA BI-ARTICULADOS 2D E 3D

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William Taylor Matias Silva

2016-09-01

Full Text Available RESUMO: Neste trabalho apresenta-se uma descrição Lagrangeana Total para retratar sólidos elastoplásticos sob deformação finita. Discretiza-se estes sólidos com elementos de treliça 2D e 3D com o intuito de obter analiticamente o vetor de forças internas e a matriz de rigidez tangente. Assume-se um modelo constitutivo hiperelástico para o estado uniaxial de tensão-deformação, utilizando a tensão de Kirchhoff e a deformação logarítmica, que formam um par energeticamente conjugado. Para descrever as deformações plásticas finitas utiliza-se a hipótese da decomposição multiplicativa do estiramento uniaxial do elemento de treliça. Por fim, apresentam-se algumas simulações numéricas de sólidos 3D discretizados com elementos de treliça 2D e 3D. ABSTRACT: This paper presents a Lagrangian Total description to describe elastoplastic solids under finite deformation. These solids are discretized with truss elements 2D and 3D aiming to obtain analytically internal force vector and the tangent stiffness matrix. Are assumed a hyperelastic constitutive model for the state of uniaxial stress-strain using the Kirchhoff's stress and logarithmic strain, to form a conjugate pair energetically. To describe the finite plastic deformation using the hypothesis of the multiplicative decomposition of uniaxial stretching of the truss element. Finally, we present some numerical simulations of solid 3D discretized with 2D and 3D truss elements.

Método para obtenção de medidas antropométricas utilizando um digitalizador 3D de baixo custo

OpenAIRE

Clariana Fischer Bendler; Fábio Gonçalves Teixeira

2016-01-01

O objetivo é desenvolver um método para obtenção de medidas antropométricas através de um digitalizador 3D de baixo custo. A metodologia da pesquisa consiste em seis etapas: pesquisa bibliográfica, coleta e análise dos dados antropométricos pelo método direto e o desenvolvimento do método indireto de obtenção de medidas antropométricas, comparação e análise dos dados obtidos, discussão dos resultados e a finalização. O processo de digitalização utilizado está baseado em um dispositivo de baix...

Diseño e implementación de procedimientos administrativos, contables y comerciales para el mejoramiento de una microempresa de consumo masivo de alimentos del Barrio Cuba

OpenAIRE

Chávez Garcés, Diana; Maingón Escobar, Katherine

2011-01-01

Se considera al sector microempresarial como parte primordial para el crecimiento y desarrollo del país, pues emplea un alto porcentaje de la fuerza laboral. Las microempresas están conformadas generalmente por personas de escasos recursos que no cuentan con un trabajo fijo o que además desean complementar sus ingresos; los mismos que toman la iniciativa al poner en marcha su deseo de superación, convirtiéndose en emprendedores creando una microempresa. Nuestra sociedad denota que la m...

Conocimientos y actitudes sobre sexualidad humana de alumnos de la Universidad Nacional de la Amazonía Peruana; lineamientos para el programa de educación sexual

OpenAIRE

Ríos Pérez, Rodolfo

2003-01-01

El estudio tuvo como objetivo evaluar los conocimientos y actitudes sobre sexualidad humana según el sexo y tipo de colegio de procedencia de los alumnos de las facultades de la Universidad Nacional de la Amazonía Peruana y plantear lineamientos para un programa de educación sexual de alumnos universitarios. El estudio fue una investigación no experimental , cuyo diseño fue transeccional correlacional La población estuvo conformada por todos los alumnos del sistema presencial, de todas las fa...

DIGITALIZACIÓN 3D DEL RODETE DE UN COMPRESOR CENTRÍFUGO: UN PROCEDIMIENTO ALTERNATIVO 3D-DIGITIZING OF A CENTRIFUGAL COMPRESSOR'S IMPELLER: AN ALTERNATIVE PROCEDURE

Directory of Open Access Journals (Sweden)

Jairo Andrés Acosta Rojas

2007-12-01

Full Text Available En la digitalización 3D del rodete del compresor centrífugo de un turbo cargador HT3B, se evaluaron numerosas metodologías que permitieran reproducir su geometría satisfactoriamente, de modo que a partir del modelo virtual obtenido se pudiera llevar a cabo una simulación computacional de flujo en el compresor centrífugo. Tras analizar dichas metodologías se decidió que la toma de tomografías axiales computarizadas era la más indicada, a pesar de que requirió previamente la construcción de un modelo en acrílico del rodete. Una vez se contó con las tomografías axiales computarizadas del rodete, se procedió a construir el modelo virtual del mismo usando un programa CAD 3D, integrando una metodología analítica para la generación de la geometría de los álabes del rodete de un compresor centrífugo, con la información metrológica adquirida a través de las tomografías. El modelo virtual del rodete presentó características aptas para el posterior trabajo de simulación, demostrando que el procedimiento planteado constituye una alternativa viable para la digitalización 3D de piezas mecánicas de alta complejidad.In the 3D digitizing of an HT3B turbocharger's centrifugal compressor's impeller, several methodologies were evaluated, reproducing its shape in such a way, that the obtained virtual model could be used to perform a computational flow simulation in the whole centrifugal compressor. After analyzing these methodologies, computerized axial tomographies were chosen as the most suitable methodology, despite requiring the previous construction of an impeller's acrylic-made model. Once the impeller's computerized axial tomographies had been taken, the generation of the virtual model was performed by software CAD 3D, by integrating an analytic methodology for the impeller's vanes' geometrical shape generation, with the metrological information extracted from the tomographies. The virtual model generated presented

Reconstruction of 3d video from 2d real-life sequences

Directory of Open Access Journals (Sweden)

Eduardo Ramos Diaz

2010-01-01

Full Text Available En este artículo, se propone un método novedoso que permite generar secuencias de video en 3D usando secuencias de video reales en 2D. La reconstrucción de la secuencia de video en 3D se realiza usando el cálculo del mapa de profundidad y la síntesis de anaglifos. El mapa de profundidad es formado usando la técnica de correspondencia estéreo basada en la minimización de la energía de error global a partir de funciones de suavizado. La construcción del anaglifo es realizada usando la alineación del componente de color interpolándolo con el mapa de profundidad previamente formado. Adicionalmente, se emplea la transformación del mapa de profundidad para reducir el rango dinámico de los valores de disparidad, minimizando el efecto fantasma mejorando la preservación de color. Se usaron numerosas secuencias de video a color reales que contienen diferentes tipos de movimientos como traslacional, rotacional, acercamiento, y la combinación de los anteriores, demostrando buen funcionamiento visual de la reconstrucción de secuencias de video en 3D propuesta.

Funcionalidad familiar relacionada al desarrollo psicomotor en niños de 2 y 3 años con desnutrición crónica que asisten al Wawa Wasi - Juliaca 2010.

OpenAIRE

Mamani Zapana, William Harold

2012-01-01

La presente investigación se realizó con el objetivo de Determinar el tipo de funcionalidad familiar que se relaciona con el desarrollo psicomotor de niños menores de 2 y 3 años con desnutrición crónica que asisten al Programa Nacional Wawa Wasi, Juliaca 2010. La investigación fue de tipo analítico transversal de diseño correlaciona! con metodología cuantitativa. La muestra de estudio estuvo conformada por 85 niños y niñas. El instrumento utilizado para medir la funcionalidad familiar fue el ...

Rediseño y fabricación de una impresora 3D RepRap.

OpenAIRE

Huertas González, Joan

2014-01-01

El objetivo principal de este proyecto es conseguir las habilidades necesarias para fabricar una impresora 3D del tipo Rep Rap, una tipología de impresoras Open source. Una vez conseguido este objetivo se rediseñan piezas de la propia impresora con el objetivo de mejorar el diseño actual. Se plantea el proyecto como iniciación al mundo de la impresión 3D y de los materiales plásticos con los que se puede trabajar, PLA, HDPE, ABS o NYLON. Se instruye al lector para que tambié...

Validez predictiva del instrumento de evaluación de riesgos y recursos para la intervención FER-R, en adolescentes chilenos infractores de ley / Predictive Validity at the Instrument Risk and Resources (FER-R for Intervention Assessment with Young Offenders: Preliminary Study

Directory of Open Access Journals (Sweden)

Paula Alarcón

2012-12-01

Full Text Available Se estudió la validez predictiva del instrumento Ficha de Evaluación de Riesgos y Recursos (FER-R para adolescentes infractores de ley, en un lapso de dos años (2009-2011. La FER-R consta de 60 ítems y permite el registro de 10 dominios, riesgos criminogénicos, recursos y el registro de un índice de escalada delictiva. La muestra estuvo conformada por 101 adolescentes varones, entre 14 y 19 años de edad, judicializados y deriva- dos a programas de intervención en medio libre. Los principales resultados muestran que el índice general de riesgo medido por la FER-R, presenta un 68.3 % de aciertos, con un área bajo la curva ROC = 0.73, indicando una magnitud predictiva fuerte de la escala total para predecir reincidencia en los adolescentes infractores chilenos.

Vitamina D y cáncer: acción antineoplásica de la 1α, 25(OH2 -vitamina D3

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Verónica González Pardo

2012-04-01

Full Text Available La forma hormonalmente activa de la vitamina D, 1α,25(OH2-vitamina D3 (1α,25(OH2D3, además de desempeñar un rol crucial en el mantenimiento de la homeostasis de calcio en el cuerpo, también regula el crecimiento y la diferenciación de diferentes tipos celulares, incluyendo células cancerosas. Actualmente hay numerosos estudios que investigan los efectos de la hormona en estas células, debido al interés en el uso terapéutico del 1α,25(OH2D3 y de análogos con menor actividad calcémica para el tratamiento o prevención del cáncer. En este trabajo de revisión se describe el sistema endocrino de la vitamina D, su mecanismo de acción, su acción antineoplásica y se provee información sobre los últimos avances en el estudio de nuevos análogos de la hormona con menos actividad calcémica para el tratamiento del cáncer.

Recursos pragmático-retóricos de las narrativas de queja para la construcción social de la identidad de mujeres desplazadas por la violencia política en Colombia

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Yudi Herrera Núñez

2015-12-01

Full Text Available Las mujeres desplazadas por la violencia política en Colombia, no solo se enfrentan a este flagelo sino que además son expuestas a condiciones de precariedad y al estigma por las comunidades de ‘acogida’. Esta investigación pretendeidentificar los correlatos retórico-pragmáticos de los procesos narrativos de construcciónidentitaria, y del enfoque de posicionamiento interaccional de Bamberg (1997 en el contexto de la entrevista de investigación. La muestra está conformada por 17 entrevistas semi-estructuradas conformadas como relatos de experiencias personales vividas a luego del proceso de desplazamiento forzado. Los principales resultados, extraídos de nuestro estudio, destacan el uso de ‘narrativas de queja’ (Günthner (2007 como uno de los recursos preferidos que las narradoras emplean para construir su identidad. En estos relatos, el amplio despliegue de recursos narrativos, pragmáticos, retóricos y evaluativos pareciesen estar en función del objetivo interaccional de producir el alineamiento del interlocutor. En las narrativas de queja los recursosmás frecuentes son el discurso directo, el uso de presente histórico y diversos recursos evaluativos. Las narrativas se constituyen en los principales territorios donde los co-conversadores buscan y encuentran formas para mitigar el ‘problema interactivo’ y conforman una imagen de sí mismos de formas que sean interactivamente útiles.

Estimate of the damage in organs induced by neutrons in three-dimensional conformal radiotherapy; Estimacion del dano en organos inducido por neutrones en radioterapia conformada en 3D

Energy Technology Data Exchange (ETDEWEB)

Benites R, J. L. [Centro Estatal de Cancerologia de Nayarit, Servicio de Seguridad Radiologica, Calzada de la Cruz 118 sur, 63000 Tepic, Nayarit (Mexico); Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico); Uribe, M. del R., E-mail: jlbenitesr@prodigy.net.mx [Instituto Tecnico Superior de Radiologia, Calle Leon No. 129, 63000 Tepic, Nayarit (Mexico)

2014-08-15

By means of Monte Carlo methods was considered the damage in the organs, induced by neutrons, of patients with cancer that receive treatment in modality of three-dimensional conformal radiotherapy (3D-CRT) with lineal accelerator Varian Ix. The objective of this work was to estimate the damage probability in radiotherapy patients, starting from the effective dose by neutrons in the organs and tissues out of the treatment region. For that a three-dimensional mannequin of equivalent tissue of 30 x 100 x 30 cm{sup 3} was modeled and spherical cells were distributed to estimate the Kerma in equivalent tissue and the absorbed dose by neutrons. With the absorbed dose the effective dose was calculated using the weighting factors for the organ type and radiation type. With the effective dose and the damage factors, considered in the ICRP 103, was considered the probability of damage induction in organs. (Author)

Redes de organizaciones inteligentes: capacidades dinámicas para la generación de conocimiento.

Directory of Open Access Journals (Sweden)

Diego Fernando Cardona Madariaga

2013-04-01

Full Text Available Las redes conformadas por organizaciones, desarrollan intuitivamente nuevos modelos de interacción que generan pequeños mundos, autorganizados con un conjunto de reglas, costumbres, acuerdos, formas de negociación, intercambios de información y de recursos, precios, costos y trueques, entre otros, potenciando la capacidad de la Red hacia la satisfacción de necesidades de los grupos de interés, y procreando entornos mucho más sanos; esto facilita la reacción, el funcionamiento, la flexibilidad y la cooperación en la Red, frente a la inestabilidad que hoy en día prevalece en el contexto mundial. El objetivo de este trabajo, es describir la razón de lo que posiblemente ocurre, concentrándose en la capacidad de transferencia que tienen las Organizaciones para desplegar su conocimiento a la formulación y ejecución de la estrategia organizacional en la Red, evolucionando a esta última a un organismo dinámico e inteligente, que ayuda a potenciar dicho proceso de despliegue de información, energía y recursos en el ecosistema (entorno & contexto, así como a potenciar los ciclos de retroalimentación requeridos por las Organizaciones, para que realicen un repliegue hacia su interior, con la suficiente carga de conocimiento del ecosistema, y de esta forma, permitirle que inicie los ajustes y el fortalecimiento de procesos y bucles, que fomentan la innovación y el desarrollo de cada Organizaciones, de la red y su estrategia.

Tecnologías emergentes para la captura y visualización de imagen 3D

OpenAIRE

Salvador Balaguer, Eva

2017-01-01

En el mundo en el que vivimos se reconocen tres dimensiones espaciales. Sin embargo, los sensores más extendidos son bidimensionales y la tecnología 3D presenta numerosas limitaciones que impiden un uso más extendido. En la presente tesis se hace un recorrido por parte de la tecnología 3D disponible estudiando ventajas, limitaciones y aplicaciones. De las diferentes alternativas de imagen 3D, se exploran los dispositivos autoestereoscópicos multivista, la imagen integral, la imagen con inform...

Case study: Beauty and the Beast 3D: benefits of 3D viewing for 2D to 3D conversion

Science.gov (United States)

Handy Turner, Tara

2010-02-01

From the earliest stages of the Beauty and the Beast 3D conversion project, the advantages of accurate desk-side 3D viewing was evident. While designing and testing the 2D to 3D conversion process, the engineering team at Walt Disney Animation Studios proposed a 3D viewing configuration that not only allowed artists to "compose" stereoscopic 3D but also improved efficiency by allowing artists to instantly detect which image features were essential to the stereoscopic appeal of a shot and which features had minimal or even negative impact. At a time when few commercial 3D monitors were available and few software packages provided 3D desk-side output, the team designed their own prototype devices and collaborated with vendors to create a "3D composing" workstation. This paper outlines the display technologies explored, final choices made for Beauty and the Beast 3D, wish-lists for future development and a few rules of thumb for composing compelling 2D to 3D conversions.

FATORES ASSOCIADOS À VIOLÊNCIA EM ESCOLARES: AMPLIANDO SABERES E PRÁTICAS PARA A ENFERMAGEM

Directory of Open Access Journals (Sweden)

Camila Biazus Dalcin

2016-01-01

Full Text Available El presente estudio tuvo como objetivo identificar factores asociados a violencia en estudiantes de escuelas públicas de la región central del Río Grande do Sul. Estudio observacional, analítico y transversal. La muestra estuvo conformada por 435 estudiantes de quinto grado de escuela primaria hasta el nivel secundario. Los datos fueron recolectados por medio de entrevistas utilizando cuestionario estructurado. Las asociaciones entre variables dependientes e independientes se tomaron del modelo de regresión de Poisson. El análisis de datos indicó un aumentó en la prevalencia entre violencia y variables de sexo masculino, mayor número de hermanos y bajos ingresos, mientras que la religión se asoció como indicador de protección de violencia psicológica. Se concluye que los enfoques intersectoriales, interdisciplinarios y multidimensionales se revelan como estrategias para acciones de enfrentamiento a la violencia. Algunas estrategias específicas de intervenciones de enfermería son indicadas para prevenir los riesgos asociados a violencia.

Repercusión de los estilos de crianza en los rasgos de Racismo de Niños de Educación Inicial de 3 a 5 años de edad de dos Instituciones Educativas de Pueblo Libre-Ima y Miraflores-Arequipa-2015

OpenAIRE

Lovera Herrera, Claudia Yolanda

2017-01-01

La presente investigación se desarrolló con la finalidad de establecer la relación entre los Estilos de Crianza y los Rasgos de Racismo en niños de dos Instituciones Educativas de Nivel Inicial, por tal motivo se identifico en primer lugar los Rasgos de Racismo y en segundo lugar los Estilos de Crianza de los niños para luego poder establecer la relacion exitente entre variables. La muestra estuvo conformada por 60 niños de 3, 4 y 5 años, 30 niños de la ciudad de Arequipa y ...

Projeto de layout de biblioteca assistido por ferramenta de software para criação de arranjo físico em 3D: estudo aplicado à biblioteca da faculdade iDEZ

Directory of Open Access Journals (Sweden)

Sanderli José da Silva Segundo

2013-06-01

Full Text Available Introdução: Projetar uma biblioteca consiste em concentrar esforços para criar ou aprimorar atividades que estejam de acordo com a função e objetivos da mesma e da instituição a qual está subordinada. Regularmente os responsáveis por diferentes tipos de bibliotecas se deparam com o problema de gestão do seu espaço físico. O estudo do layout proporciona experimentar novas formas e permite modificações de ambientação com o intuito de buscar os requisitos citados. Contudo fazer isso em um ambiente real, nem sempre é possível, nestes casos uma ferramenta que permita ao bibliotecário projetar, promover alterações e visualizar os resultados em formatos 3D é de grande auxilio.Objetivo: Estudar o arranjo físico de bibliotecas sob a ótica de OS&M usando ferramentas 3D.Metodologia: Apresenta um estudo de caso na biblioteca da Faculdade iDEZ, localizada em João Pessoa – PB, onde foi aplicado os princípios da disciplina de Organização, Sistemas e Métodos (OS&M para arranjo físico (layout utilizando uma ferramenta de software livre para auxiliar projetos em terceira dimensão.Resultados: São indicadas e discutidas as motivações que levam um profissional de informação a ter que gerenciar seu espaço físico e as barreiras encontradas. O resultado obtido na avaliação indicou o Sweet Home 3D como ferramenta com melhor pontuação.Conclusão: A proposta de projeto resultante do estudo de caso, facilitou a visualização das mudanças, sendo aceita e implementada pelos gestores da biblioteca.

La Agenda para el Desarrollo a través del Turismo En Perú y su Relación con Intereses Internacionales

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María Luisa Rendón Puertas

2015-01-01

Full Text Available Este ensayo evidencia la relación entre la agenda para el desarrollo a través del turismo en Perú y los intereses internacionales en torno al desarrollo en este campo. Para ello, se emplea elementos teóricos desde la perspectiva constructivista acerca del desarrollo, de las políticas publicas y las relaciones internacionales, partiendo de una descripción de antecedentes históricos en la construcción política y económica del estado Peruano. Se señala rasgos principales en la configuración de la política exterior del Perú en el siglo XXI y se identifica la agenda nacional para el desarrollo a través del turismo, conformada por normas, estrategias, aparatos técnicos y programas que muestran inter subjetividades y vínculos con intereses internacionales. La informacion se obtuvo mediante entrevistas en profundidad y consultando documentos oficiales y publicaciones. Se espera aportar al mejor conocimiento de ideas a vinculadas a paradigmas del desarrollo, compartidas por actores globales y locales, así como elementos para el análisis critico del turismo.

Refined 3d-3d correspondence

Energy Technology Data Exchange (ETDEWEB)

Alday, Luis F.; Genolini, Pietro Benetti; Bullimore, Mathew; Loon, Mark van [Mathematical Institute, University of Oxford, Andrew Wiles Building,Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG (United Kingdom)

2017-04-28

We explore aspects of the correspondence between Seifert 3-manifolds and 3d N=2 supersymmetric theories with a distinguished abelian flavour symmetry. We give a prescription for computing the squashed three-sphere partition functions of such 3d N=2 theories constructed from boundary conditions and interfaces in a 4d N=2{sup ∗} theory, mirroring the construction of Seifert manifold invariants via Dehn surgery. This is extended to include links in the Seifert manifold by the insertion of supersymmetric Wilson-’t Hooft loops in the 4d N=2{sup ∗} theory. In the presence of a mass parameter for the distinguished flavour symmetry, we recover aspects of refined Chern-Simons theory with complex gauge group, and in particular construct an analytic continuation of the S-matrix of refined Chern-Simons theory.

RECOMENDACIONES SOBRE SUPLEMENTOS DE VITAMINA D Y CALCIO PARA LAS PERSONAS ADULTAS EN ESPAÑA

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Ana Isabel Rigueira García

2012-01-01

Full Text Available Fundamentos: Los suplementos de calcio y vitamina D están involucrados en debates sanitarios actuales, como la seguridad cardiovascular del calcio y la corrección de los niveles vitamínicos. El objetivo de esta revisión es la evaluación de la información existente de los suplementos de calcio y/o vitamina D disponibles y financiados en España, así como la evaluación de las recomendaciones para su utilización. Métodos: Análisis de la oferta comercial e información disponible sobre aspectos farmacológicos de los suplementos medicamentos españoles en 39 fichas técnicas, guías e informes institucionales y profesionales actualizados, con búsqueda complementaria de información y de datos epidemiológicos españoles relacionados en Cochrane Database of Systematic Reviews®, PubMed® (herramienta "Clinical Queries", base de datos Dialnet y búsqueda manual en revistas españolas directamente relacionadas. Resultados: No existe uniformidad en cuanto a indicación, expresión de contenido, posologías, precauciones y seguridad ni en fichas técnicas ni en los informes técnicos. La búsqueda bibliográfica ha encontrado un mayor volumen de publicaciones recientes para la vitamina D que para el calcio. No se han encontrado pruebas científicas apropiadas para establecer regímenes posológicos indiscutibles ni universales, ni pruebas de biodisponibilidad para colecalciferol con vehiculización acuosa. En España se constata una situación nutricional generalmente adecuada para el calcio pero un estatus mayoritariamente inadecuado para la vitamina D, con varias referencias de insuficiencia y carencia vitamínica en adultos. Los tratamientos correctores inciden fundamentalmente en el uso de suplementos de calcio. Conclusiones: Existe una amplia oferta de suplementos de calcio y vitamina D en España cuyo diseño farmacológico debería replantearse puesto que no responden a las necesidades detectadas ni a las posibilidades de correcci

YouDash3D: exploring stereoscopic 3D gaming for 3D movie theaters

Science.gov (United States)

Schild, Jonas; Seele, Sven; Masuch, Maic

2012-03-01

Along with the success of the digitally revived stereoscopic cinema, events beyond 3D movies become attractive for movie theater operators, i.e. interactive 3D games. In this paper, we present a case that explores possible challenges and solutions for interactive 3D games to be played by a movie theater audience. We analyze the setting and showcase current issues related to lighting and interaction. Our second focus is to provide gameplay mechanics that make special use of stereoscopy, especially depth-based game design. Based on these results, we present YouDash3D, a game prototype that explores public stereoscopic gameplay in a reduced kiosk setup. It features live 3D HD video stream of a professional stereo camera rig rendered in a real-time game scene. We use the effect to place the stereoscopic effigies of players into the digital game. The game showcases how stereoscopic vision can provide for a novel depth-based game mechanic. Projected trigger zones and distributed clusters of the audience video allow for easy adaptation to larger audiences and 3D movie theater gaming.

PROSPECÇÃO DE MERCADO VISANDO P&D PARA MEDICAMENTOS VETERINÁRIOS PARA BOVINOCULTURA NO BRASIL

Directory of Open Access Journals (Sweden)

Helio De Sena Gouvea Omote

2014-07-01

Full Text Available A indústria de medicamentos veterinários no Brasil possui desafios relacionados à inovação em produtos. A Embrapa Pecuária Sudeste atua em uma linha de pesquisa relacionada a alternativas de controle de parasitas na bovinocultura. E a formação de redes de inovação é uma estratégia importante para catalisar a obtenção dos resultados de P&D neste setor. Assim, este trabalho objetivou prospectar o mercado de medicamentos veterinários, com foco na bovinocultura no Brasil, visando oportunidades de parceria para inovação. A análise das informações coletadas neste estudo prospectivo indica que o mercado de medicamentos veterinários no Brasil é concentrado e os clientes dispersos. As características mais relevantes desta indústria são relativas à intensidade em capital e em P&D, alto grau de interdependência entre os segmentos e estrutura de produção complexa e com forte cunho tecnológico. Foram identificadas seis grandes empresas de atuação global, sendo duas de capital nacional, e outras pequenas empresas com foco regional, que ocupam nichos de mercado. Quanto a produtos, focando em antiparasitários, são muitos disponíveis no mercado, entretanto com poucos princípios ativos. Desta forma, vislumbram-se oportunidades de parceria frente às pesquisas desenvolvidas na Embrapa Pecuária Sudeste, principalmente às relacionadas com alternativas para controle parasitário na pecuária.

3D-mallien muokkaus 3D-tulostamista varten CAD-ohjelmilla

OpenAIRE

Lehtimäki, Jarmo

2013-01-01

Insinöörityössäni käsitellään 3D-mallien tulostamista ja erityisesti 3D-mallien mallintamista niin, että kappaleiden valmistaminen 3D-tulostimella onnistuisi mahdollisimman hyvin. Työ tehtiin Prohoc Oy:lle, joka sijaitsee Vaasassa. 3D-tulostuspalveluun tuli jatkuvasti 3D-malleja, joiden tulostuksessa oli ongelmia. Työssäni tutkin näiden ongelmien syntyä ja tein ohjeita eri 3D-mallinnusohjelmille, joiden tarkoituksena on auttaa tekemään helpommin tulostettavia 3D-malleja. Työhön kuului myös et...

3D imaging, 3D printing and 3D virtual planning in endodontics.

Science.gov (United States)

Shah, Pratik; Chong, B S

2018-03-01

The adoption and adaptation of recent advances in digital technology, such as three-dimensional (3D) printed objects and haptic simulators, in dentistry have influenced teaching and/or management of cases involving implant, craniofacial, maxillofacial, orthognathic and periodontal treatments. 3D printed models and guides may help operators plan and tackle complicated non-surgical and surgical endodontic treatment and may aid skill acquisition. Haptic simulators may assist in the development of competency in endodontic procedures through the acquisition of psycho-motor skills. This review explores and discusses the potential applications of 3D printed models and guides, and haptic simulators in the teaching and management of endodontic procedures. An understanding of the pertinent technology related to the production of 3D printed objects and the operation of haptic simulators are also presented.

Sistema de comercio electrónico para el sector textil: generar maniquíes 3D a partir de imágenes del sensor Kinect

OpenAIRE

Olabarria Iñarra, Ibon

2014-01-01

Este proyecto consiste en analizar la viabilidad técnica un sistema de información para mejorar el comercio electrónico de compra –venta de ropa. El nuevo sistema de comercio electrónico ayudará al usuario a escoger el tamaño de la prenda con más precisión. El sistema consiste en calcular las medidas esenciales del cuerpo del cliente utilizando el dispositivo Kinect. Posteriormente, estas medidas se introducen en el programa Makehuman que genera un maniquí en 3D. Con la idea de que en el futu...

A 3d-3d appetizer

Energy Technology Data Exchange (ETDEWEB)

Pei, Du; Ye, Ke [Walter Burke Institute for Theoretical Physics, California Institute of Technology, Pasadena, CA, 91125 (United States)

2016-11-02

We test the 3d-3d correspondence for theories that are labeled by Lens spaces. We find a full agreement between the index of the 3d N=2 “Lens space theory” T[L(p,1)] and the partition function of complex Chern-Simons theory on L(p,1). In particular, for p=1, we show how the familiar S{sup 3} partition function of Chern-Simons theory arises from the index of a free theory. For large p, we find that the index of T[L(p,1)] becomes a constant independent of p. In addition, we study T[L(p,1)] on the squashed three-sphere S{sub b}{sup 3}. This enables us to see clearly, at the level of partition function, to what extent G{sub ℂ} complex Chern-Simons theory can be thought of as two copies of Chern-Simons theory with compact gauge group G.

Capacidad discriminante de la Escala de Componentes Emocionales (ECE-I en un diseño con grupos pareados

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Diego Quirós-Morales

2009-01-01

Full Text Available Se evaluaron las características discriminantes y predictivas de la Escala de Componentes Emocionales (ECE-I en personas diagnosticadas con fibromialgia. La escala está conformada por 24 ítems distribuidos en 4 factores: problemas fisiológicos (F-PF, autoevaluación negativa (F-AN, desesperanza (F-D, estrés (F-E. Se utilizó una muestra de 124 mujeres (62 diagnosticadas con fibromialgia y 62 sin fibromialgia. Los niveles de predicción y clasificación expresan que la escala puede ser un instrumento útil en psicología de la salud para discriminar la presencia de indicadores emocionales para personas con diagnóstico de fibromialgia.

Quasi 3D dosimetry (EPID, conventional 2D/3D detector matrices)

International Nuclear Information System (INIS)

Bäck, A

2015-01-01

Patient specific pretreatment measurement for IMRT and VMAT QA should preferably give information with a high resolution in 3D. The ability to distinguish complex treatment plans, i.e. treatment plans with a difference between measured and calculated dose distributions that exceeds a specified tolerance, puts high demands on the dosimetry system used for the pretreatment measurements and the results of the measurement evaluation needs a clinical interpretation. There are a number of commercial dosimetry systems designed for pretreatment IMRT QA measurements. 2D arrays such as MapCHECK ® (Sun Nuclear), MatriXX Evolution (IBA Dosimetry) and OCTAVIOUS ® 1500 (PTW), 3D phantoms such as OCTAVIUS ® 4D (PTW), ArcCHECK ® (Sun Nuclear) and Delta 4 (ScandiDos) and software for EPID dosimetry and 3D reconstruction of the dose in the patient geometry such as EPIDose TM (Sun Nuclear) and Dosimetry Check TM (Math Resolutions) are available. None of those dosimetry systems can measure the 3D dose distribution with a high resolution (full 3D dose distribution). Those systems can be called quasi 3D dosimetry systems. To be able to estimate the delivered dose in full 3D the user is dependent on a calculation algorithm in the software of the dosimetry system. All the vendors of the dosimetry systems mentioned above provide calculation algorithms to reconstruct a full 3D dose in the patient geometry. This enables analyzes of the difference between measured and calculated dose distributions in DVHs of the structures of clinical interest which facilitates the clinical interpretation and is a promising tool to be used for pretreatment IMRT QA measurements. However, independent validation studies on the accuracy of those algorithms are scarce. Pretreatment IMRT QA using the quasi 3D dosimetry systems mentioned above rely on both measurement uncertainty and accuracy of calculation algorithms. In this article, these quasi 3D dosimetry systems and their use in patient specific

Irradiación subletal de fibroblastos murinos 3T3 con rayos X para su utilización como capa celular alimentadora

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Andrea Ramírez-Téllez

2015-05-01

Full Text Available Los queratinocitos, las principales células de la epidermis, requieren una capa alimentadora de células viables mitóticamente inactivadas para su supervivencia y proliferación in vitro. Para la producción de capas alimentadoras a partir de fibroblastos murinos 3T3, se evaluaron cuatro dosis de radiación con rayos X. Los efectos de las dosis se evaluaron mediante recuentos celulares y determinación de la viabilidad (MTT, adhesión (eficiencia de plateo y migración celular (scratch wound healing. Además, se encontraron evidencias que sugieren el arresto mitótico mediante una tinción nuclear (GIEMSA. Se observó que una dosis de radiación correspondiente a 80 Gy generó daños suficientes en la línea celular para causar el arresto mitótico, manteniendo a la vez la actividad metabólica basal durante 25 días.

Control monocular 3D dinámico basado en imagen

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Luis Hernández Santana

2011-09-01

Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow: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:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} En este trabajo se presenta un sistema de control servovisual para regulación de posición de un robot manipulador con cámara en mano que se mueve en el espacio cartesiano 3D. El objetivo es control el robot de tal forma que la imagen de una esfera en movimiento se mantenga en el centro del plano imagen con radio constante. Se propone una estrategia de control con dos lazos en cascada, el lazo interno resuelve el control articular y el lazo externo implementa el control con realimentación visual. El robot y el sistema de visión son modelados para pequeñas variaciones alrededor del punto de operación para control de posición. Para estas condiciones se muestran la estabilidad del sistema y la respuesta en estado estable para trayectorias del objeto. Para ilustrar las prestaciones del sistema, se presentan los resultados experimentales para un manipulador ASEAIRB6.

3D MR cisternography to identify distal dural rings. Comparison of 3D-CISS and 3D-SPACE sequences

International Nuclear Information System (INIS)

Watanabe, Yoshiyuki; Makidono, Akari; Nakamura, Miho; Saida, Yukihisa

2011-01-01

The distal dural ring (DDR) is an anatomical landmark used to distinguish intra- and extradural aneurysms. We investigated identification of the DDR using 2 three-dimensional (3D) magnetic resonance (MR) cisternography sequences-3D constructive interference in steady state (CISS) and 3D sampling perfection with application optimized contrasts using different flip angle evolutions (SPACE)-at 3.0 tesla. Ten healthy adult volunteers underwent imaging with 3D-CISS, 3D-SPACE, and time-of-flight (TOF) MR angiography (TOF-MRA) sequences at 3.0T. We analyzed DDR identification and internal carotid artery (ICA) signal intensity and classified the shape of the carotid cave. We identified the DDR using both 3D-SPACE and 3D-CISS, with no significant difference between the sequences. Visualization of the outline of the ICA in the cavernous sinus (CS) was significantly clearer with 3D-SPACE than 3D-CISS. In the CS and petrous portions, signal intensity was lower with 3D-SPACE, and the flow void was poor with 3D-CISS in some subjects. We identified the DDR with both 3D-SPACE and 3D-CISS, but the superior contrast of the ICA in the CS using 3D-SPACE suggests the superiority of this sequence for evaluating the DDR. (author)

3D video

CERN Document Server

Lucas, Laurent; Loscos, Céline

2013-01-01

While 3D vision has existed for many years, the use of 3D cameras and video-based modeling by the film industry has induced an explosion of interest for 3D acquisition technology, 3D content and 3D displays. As such, 3D video has become one of the new technology trends of this century.The chapters in this book cover a large spectrum of areas connected to 3D video, which are presented both theoretically and technologically, while taking into account both physiological and perceptual aspects. Stepping away from traditional 3D vision, the authors, all currently involved in these areas, provide th

3D composite image, 3D MRI, 3D SPECT, hydrocephalus

International Nuclear Information System (INIS)

Mito, T.; Shibata, I.; Sugo, N.; Takano, M.; Takahashi, H.

2002-01-01

The three-dimensional (3D)SPECT imaging technique we have studied and published for the past several years is an analytical tool that permits visual expression of the cerebral circulation profile in various cerebral diseases. The greatest drawback of SPECT is that the limitation on precision of spacial resolution makes intracranial localization impossible. In 3D SPECT imaging, intracranial volume and morphology may vary with the threshold established. To solve this problem, we have produced complimentarily combined SPECT and helical-CT 3D images by means of general-purpose visualization software for intracranial localization. In hydrocephalus, however, the key subject to be studied is the profile of cerebral circulation around the ventricles of the brain. This suggests that, for displaying the cerebral ventricles in three dimensions, CT is a difficult technique whereas MRI is more useful. For this reason, we attempted to establish the profile of cerebral circulation around the cerebral ventricles by the production of combined 3D images of SPECT and MRI. In patients who had shunt surgery for hydrocephalus, a difference between pre- and postoperative cerebral circulation profiles was assessed by a voxel distribution curve, 3D SPECT images, and combined 3D SPECT and MRI images. As the shunt system in this study, an Orbis-Sigma valve of the automatic cerebrospinal fluid volume adjustment type was used in place of the variable pressure type Medos valve currently in use, because this device requires frequent changes in pressure and a change in pressure may be detected after MRI procedure. The SPECT apparatus used was PRISM3000 of the three-detector type, and 123I-IMP was used as the radionuclide in a dose of 222 MBq. MRI data were collected with an MAGNEXa+2 with a magnetic flux density of 0.5 tesla under the following conditions: field echo; TR 50 msec; TE, 10 msec; flip, 30ueK; 1 NEX; FOV, 23 cm; 1-mm slices; and gapless. 3D images are produced on the workstation TITAN

3D Printing and 3D Bioprinting in Pediatrics.

Science.gov (United States)

Vijayavenkataraman, Sanjairaj; Fuh, Jerry Y H; Lu, Wen Feng

2017-07-13

Additive manufacturing, commonly referred to as 3D printing, is a technology that builds three-dimensional structures and components layer by layer. Bioprinting is the use of 3D printing technology to fabricate tissue constructs for regenerative medicine from cell-laden bio-inks. 3D printing and bioprinting have huge potential in revolutionizing the field of tissue engineering and regenerative medicine. This paper reviews the application of 3D printing and bioprinting in the field of pediatrics.

3D Printing and 3D Bioprinting in Pediatrics

OpenAIRE

Vijayavenkataraman, Sanjairaj; Fuh, Jerry Y H; Lu, Wen Feng

2017-01-01

Additive manufacturing, commonly referred to as 3D printing, is a technology that builds three-dimensional structures and components layer by layer. Bioprinting is the use of 3D printing technology to fabricate tissue constructs for regenerative medicine from cell-laden bio-inks. 3D printing and bioprinting have huge potential in revolutionizing the field of tissue engineering and regenerative medicine. This paper reviews the application of 3D printing and bioprinting in the field of pediatrics.

A microfluidic device for 2D to 3D and 3D to 3D cell navigation

International Nuclear Information System (INIS)

Shamloo, Amir; Amirifar, Leyla

2016-01-01

Microfluidic devices have received wide attention and shown great potential in the field of tissue engineering and regenerative medicine. Investigating cell response to various stimulations is much more accurate and comprehensive with the aid of microfluidic devices. In this study, we introduced a microfluidic device by which the matrix density as a mechanical property and the concentration profile of a biochemical factor as a chemical property could be altered. Our microfluidic device has a cell tank and a cell culture chamber to mimic both 2D to 3D and 3D to 3D migration of three types of cells. Fluid shear stress is negligible on the cells and a stable concentration gradient can be obtained by diffusion. The device was designed by a numerical simulation so that the uniformity of the concentration gradients throughout the cell culture chamber was obtained. Adult neural cells were cultured within this device and they showed different branching and axonal navigation phenotypes within varying nerve growth factor (NGF) concentration profiles. Neural stem cells were also cultured within varying collagen matrix densities while exposed to NGF concentrations and they experienced 3D to 3D collective migration. By generating vascular endothelial growth factor concentration gradients, adult human dermal microvascular endothelial cells also migrated in a 2D to 3D manner and formed a stable lumen within a specific collagen matrix density. It was observed that a minimum absolute concentration and concentration gradient were required to stimulate migration of all types of the cells. This device has the advantage of changing multiple parameters simultaneously and is expected to have wide applicability in cell studies. (paper)

3D game environments create professional 3D game worlds

CERN Document Server

Ahearn, Luke

2008-01-01

The ultimate resource to help you create triple-A quality art for a variety of game worlds; 3D Game Environments offers detailed tutorials on creating 3D models, applying 2D art to 3D models, and clear concise advice on issues of efficiency and optimization for a 3D game engine. Using Photoshop and 3ds Max as his primary tools, Luke Ahearn explains how to create realistic textures from photo source and uses a variety of techniques to portray dynamic and believable game worlds.From a modern city to a steamy jungle, learn about the planning and technological considerations for 3D modelin

Plasma and milk concentrations of vitamin D3 and 25-hydroxy vitamin D3 following intravenous injection of vitamin D3 or 25-hydroxy vitamin D3.

OpenAIRE

Hidiroglou, M; Knipfel, J E

1984-01-01

Plasma levels of vitamin D3 or 25-hydroxyvitamin D3 in ewes after administration of a single massive intravenous dose of vitamin D3 (2 X 10(6) IU) or 25-hydroxy vitamin D3 (5 mg) were determined at zero, one, two, three, five, ten and 20 days postinjection. In six ewes injected with vitamin D3 conversion of vitamin D3 to 25-hydroxy vitamin D3 resulted in a six-fold increase in the plasma 25-hydroxy vitamin D3 level within one day. Elevated levels were maintained until day 10 but by day 20 a s...

CARACTERÍSTICAS DA REPRESENTAÇÃO 2D E SUAS LIMITAÇÕES PARA A COMPATIBILIZAÇÃO ESPACIAL

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Rita Cristina Ferreira

2007-11-01

Full Text Available Em artigo anterior (FERREIRA; SANTOS, 2004, os autores mostraram, através de um estudo de caso, como o uso do CAD 3D permitiu acelerar significativamente o desenvolvimento de um projeto de vedações e compatibilização de subsistemas em relação ao tradicional processo baseado em CAD 2D. Ao contrário do que se esperava, o mesmo caso não permitiu averiguar ganhos de eficácia na detecção de incompatibilidades espaciais, tendo ambos os métodos identificado essencialmente o mesmo número de conflitos. A hipótese para esse resultado foi a de que o projeto estudado no caso foi tão simples que não chegou a exigir o recurso 3D para identificação dos problemas. Com a finalidade de aprofundar esse estudo, analisou-se um conjunto significativo de projetos de vedações e compatibilização já realizados, buscando-se identificar padrões nas causas das incompatibilidades detectadas. Dentre essas causas, foram selecionadas aquelas em que o uso do CAD 3D potencialmente poderia auxiliar o projetista a evitar a interferência. Essas causas normalmente estão ligadas a limitações da representação 2D tradicional (plantas, elevações, cortes e simbologias, que induzem os projetistas das diversas disciplinas a soluções espaciais incompatíveis, por não permitirem a visualização clara das interferências.

Los mapas conceptuales y su influencia en lo afectivo-valorativo del estudiante para aprender biología

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Acosta, Savier

2010-09-01

Full Text Available El objetivo de esta investigación fue identificar la influencia de los mapas conceptuales en lo afectivo-valorativo del estudiante para aprender Biología. Las teorías que sirvieron de apoyo las fueron Díaz y Hernández (2007, Novak (1998. La investigación se realizó en la Unidad Educativa José Antonio Almarza; fue de tipo experimental con un diseño cuasi-experimental. La población estuvo conformada por 468 estudiantes, de donde se seleccionó una muestra de 68 estudiantes (33 del grupo control y (35 el grupo experimental. La técnica utilizada para recolectar información fue la observación; el instrumento, una hoja de registro validado previamente por expertos en el área. Se aplicó la prueba t de student para establecer los grados de significancia entre el pre y postest, el análisis de los resultados se efectuó mediante la estadística descriptiva y la inferencial a través de frecuencias, porcentajes, media y la desviación estándar. Como resultados los mapas conceptuales aumentan en los estudiantes su responsabilidad para aprender Biología, respeto hacia la forma de pensar de los demás, valoración del trabajo en equipo, importancia para aprender Biología e incorporación de experiencias significativas del contexto. En conclusión que los mapas conceptuales ejercen influencia en el desarrollo de sentimientos y valores en los estudiantes para aprender dicha ciencia.

Isotopic analysis of H{sub 2}, HD, D{sub 2} mixtures and analysis of ortho-para-hydrogen mixtures by gas chromatography; Dosages par chromatographie en phase gazeuse de melanges d'hydrogene, d'hydrogene deutere, de deuterium et de melanges ortho-para-hydrogene

Energy Technology Data Exchange (ETDEWEB)

Botter, F; Perriere, G de la; Tistchenko, S [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

1961-07-01

This communication describes the present situation concerning the possibilities of vapor phase chromatography for the separation and analysis of mixtures of H{sub 2}, HD and D{sub 2} and of ortho- and para-hydrogen mixtures. Separation factors for physical adsorption of the various varieties of hydrogen have been deduced from chromatograms and have also been measured directly with a static method - the agreements is good. (author) [French] Le present rapport decrit diverses possibilites qu'offre la chromatographie gazeuse d'elution en ce qui concerne le dosage des melanges H{sub 2}, HD, D{sub 2} et des varietes ortho et para de l'hydrogene. On a calcule, a partir des chromatogrammes obtenus, les facteurs de separation par adsorption physique des differentes varietes d'hydrogene, et compare aux facteurs de separation determines par mesure directe. (auteur)

3-D Whole-Core Transport Calculation with 3D/2D Rotational Plane Slicing Method

Energy Technology Data Exchange (ETDEWEB)

Yoo, Han Jong; Cho, Nam Zin [Korea Advanced Institute of Science and Technology, Daejeon (Korea, Republic of)

2014-10-15

Use of the method of characteristics (MOC) is very popular due to its capability of heterogeneous geometry treatment and widely used for 2-D core calculation, but direct extension of MOC to 3-D core is not so attractive due to huge calculational cost. 2-D/1-D fusion method was very successful for 3-D calculation of current generation reactor types (highly heterogeneous in radial direction but piece-wise homogeneous in axial direction). In this paper, 2-D MOC concept is extended to 3-D core calculation with little modification of an existing 2-D MOC code. The key idea is to suppose 3-D geometry as a set of many 2-D planes like a phone-directory book. Dividing 3-D structure into a large number of 2-D planes and solving each plane with a simple 2-D SN transport method would give the solution of a 3-D structure. This method was developed independently at KAIST but it is found that this concept is similar with that of 'plane tracing' in the MCCG-3D code. The method developed was tested on the 3-D C5G7 OECD/NEA benchmark problem and compared with the 2-D/1-D fusion method. Results show that the proposed method is worth investigating further. A new approach to 3-D whole-core transport calculation is described and tested. By slicing 3-D structure along characteristic planes and solving each 2-D plane problem, we can get 3-D solution. The numerical test results indicate that the new method is comparable with the 2D/1D fusion method and outperforms other existing methods. But more fair comparison should be done in similar discretization level.

From 2D to 3D turbulence through 2D3C configurations

Science.gov (United States)

Buzzicotti, Michele; Biferale, Luca; Linkmann, Moritz

2017-11-01

We study analytically and numerically the geometry of the nonlinear interactions and the resulting energy transfer directions of 2D3C flows. Through a set of suitably designed Direct Numerical Simulations we also study the coupling between several 2D3C flows, where we explore the transition between 2D and fully 3D turbulence. In particular, we find that the coupling of three 2D3C flows on mutually orthogonal planes subject to small-scale forcing leads to a stationary 3D out-of-equilibrium dynamics at the energy containing scales where the inverse cascade is directly balanced by a forward cascade carried by a different subsets of interactions. ERC AdG Grant No 339032 NewTURB.

3D Space Shift from CityGML LoD3-Based Multiple Building Elements to a 3D Volumetric Object

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Shen Ying

2017-01-01

Full Text Available In contrast with photorealistic visualizations, urban landscape applications, and building information system (BIM, 3D volumetric presentations highlight specific calculations and applications of 3D building elements for 3D city planning and 3D cadastres. Knowing the precise volumetric quantities and the 3D boundary locations of 3D building spaces is a vital index which must remain constant during data processing because the values are related to space occupation, tenure, taxes, and valuation. To meet these requirements, this paper presents a five-step algorithm for performing a 3D building space shift. This algorithm is used to convert multiple building elements into a single 3D volumetric building object while maintaining the precise volume of the 3D space and without changing the 3D locations or displacing the building boundaries. As examples, this study used input data and building elements based on City Geography Markup Language (CityGML LoD3 models. This paper presents a method for 3D urban space and 3D property management with the goal of constructing a 3D volumetric object for an integral building using CityGML objects, by fusing the geometries of various building elements. The resulting objects possess true 3D geometry that can be represented by solid geometry and saved to a CityGML file for effective use in 3D urban planning and 3D cadastres.

Effect of 24,25-dihydroxyvitamin D3 on 1,25-dihydroxyvitamin D3 [1,25-(OH)2D3] metabolism in vitamin D-deficient rats infused with 1,25-(OH)2D3

International Nuclear Information System (INIS)

Yamato, H.; Matsumoto, T.; Fukumoto, S.; Ikeda, K.; Ishizuka, S.; Ogata, E.

1989-01-01

Previous studies revealed that administration of 24,25-dihydroxyvitamin D3 [24,25-(OH)2D3] to calcium (Ca)-deficient rats causes a dose-dependent reduction in markedly elevated serum 1,25-(OH)2D3 level. Although the results suggested that the metabolism of 1,25-(OH)2D3 was accelerated by 24,25-(OH)2D3, those experiments could not define whether the enhanced metabolism of 1,25-(OH)2D3 played a role in the reduction in the serum 1,25-(OH)2D3 level. In the present study, in order to address this issue more specifically, serum 1,25-(OH)2D3 was maintained solely by exogenous administration through miniosmotic pumps of 1,25-(OH)2D3 into vitamin D-deficient rats. Thus, by measuring the serum 1,25-(OH)2D3 concentration, the effect of 24,25-(OH)2D3 on the MCR of 1,25-(OH)2D3 could be examined. Administration of 24,25-(OH)2D3 caused a dose-dependent enhancement in the MCR of 1,25-(OH)2D3, and 1 microgram/100 g rat.day 24,25-(OH)2D3, which elevated serum 24,25-(OH)2D3 to 8.6 +/- 1.3 ng/ml, significantly increased MCR and suppressed serum levels of 1,25-(OH)2D3. The effect of 24,25-(OH)2D3 on 1,25-(OH)2D3 metabolism developed with a rapid time course, and the recovery of iv injected [1 beta-3H]1,25-(OH)2D3 in blood was significantly reduced within 1 h. In addition, there was an increase in radioactivity in the water-soluble fraction of serum as well as in urine, suggesting that 1,25-(OH)2D3 is rapidly degraded to a water-soluble metabolite(s). Furthermore, the reduction in serum 1,25-(OH)2D3 was associated with a reduction in both serum and urinary Ca levels. Because the conversion of [3H]24,25-(OH)2D3 to [3H]1,24,25-(OH)2D3 or other metabolites was minimal in these rats, 24,25-(OH)2D3 appears to act without being converted into other metabolites. These results demonstrate that 24,25-(OH)2D3 rapidly stimulates the metabolism of 1,25-(OH)2D3 and reduces its serum level

EMPODERAMIENTO DIGITAL: INTEGRACIÓN UNIVERSIDAD, EMPRESA Y POLÍTICAS PÚBLICAS PARA EL DESARROLLO ENDÓGENO

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Norcelly Carruyo

2017-03-01

Full Text Available El artículo tiene como finalidad analizar el empoderamiento digital como estrategia de integración universidad, empresa y políticas públicas para el desarrollo endógeno. Se sustenta en los postulados de Guitert (2013, Negroponte (2010, Pérez (2012, entre otros. Metodológicamente se basa en un paradigma científico-positivista, de tipo descriptivo con un diseño no experimental, transversal, de campo. La población estuvo conformada por (22 sujetos con las siguientes características: activos en los sectores universitario, empresarial y político en el Departamento de Sucre- Colombia. Entre los resultados se concluye que existen debilidades en las estrategias y fases de integración así como la realización de actividades que propicien la sostenibilidad local.

Estrategia educativa sobre hipertensión arterial para adultos mayores de un consultorio del Policlínico Previsora Educational strategy on hypertension for elderly patients from Previsora Polyclinic

Directory of Open Access Journals (Sweden)

Magalys Álvarez Reyes

2011-12-01

Full Text Available Se realizó un estudio de intervención educativa cuasi-experimental para incrementar el nivel de conocimiento sobre hipertensión arterial de adultos mayores de un consultorio del Policlínico Universitario Previsora, Camagüey, de febrero de 2009 a febrero de 2010. El universo fue de 82 pacientes y la muestra quedó conformada por 38 personas a las que se aplicó una encuesta para identificar las necesidades de aprendizaje sobre la enfermedad. Posteriormente se empleó un programa instructivo a partir de técnicas participativas. Transcurridos 90 días se aplicó una segunda encuesta para verificar la eficacia de la intervención y se constató un aumento de las respuestas correctas en los factores de riesgos y tratamiento. Al final del estudio la mayor parte de los participantes fueron evaluados de bien, lo que ratifica la utilidad y eficacia de la intervención.From February 2009 to February 2010, a quasi-experimental educational intervention was carried out at Camagüey’s Previsora University Polyclinic to increase elderly patients’ knowledge about hypertension. Out of a universe of 82, the sample comprised 38 patients who were surveyed to identify their learning needs concerning the illness. After receiving an educational program, patients answered a second survey to confirm effectiveness. Results showed an increase of correct answers about risk factors and treatment of the illness. At the end of the study, most of he patients were graded as good. The latter validated the usefulness of the intervention.

RAG-3D: a search tool for RNA 3D substructures

Science.gov (United States)

Zahran, Mai; Sevim Bayrak, Cigdem; Elmetwaly, Shereef; Schlick, Tamar

2015-01-01

To address many challenges in RNA structure/function prediction, the characterization of RNA's modular architectural units is required. Using the RNA-As-Graphs (RAG) database, we have previously explored the existence of secondary structure (2D) submotifs within larger RNA structures. Here we present RAG-3D—a dataset of RNA tertiary (3D) structures and substructures plus a web-based search tool—designed to exploit graph representations of RNAs for the goal of searching for similar 3D structural fragments. The objects in RAG-3D consist of 3D structures translated into 3D graphs, cataloged based on the connectivity between their secondary structure elements. Each graph is additionally described in terms of its subgraph building blocks. The RAG-3D search tool then compares a query RNA 3D structure to those in the database to obtain structurally similar structures and substructures. This comparison reveals conserved 3D RNA features and thus may suggest functional connections. Though RNA search programs based on similarity in sequence, 2D, and/or 3D structural elements are available, our graph-based search tool may be advantageous for illuminating similarities that are not obvious; using motifs rather than sequence space also reduces search times considerably. Ultimately, such substructuring could be useful for RNA 3D structure prediction, structure/function inference and inverse folding. PMID:26304547

NECESIDADES DE APRENDIZAJE PARA LA SEXUALIDAD DE JÓVENES ENTRE 10 Y 19 AÑOS EN EL CARIBE COLOMBIANO

Directory of Open Access Journals (Sweden)

Nydia Ninna Valencia Jiménez

2009-01-01

Full Text Available En este trabajo se identifican el tipo de necesidades de aprendizaje para la sexualidad de los adolescentes entre 10 y 19 años del municipio de Tierralta, Córdoba (Colombia, y se analizan los conocimientos, actitudes y prácticas que tienen los sujetos de estudio y aspiran tener. La investigación es de tipo etnográfica, y se inscribe en el estudio de casos. La muestra estuvo conformada por 69 adolescentes escolarizados del casco urbano del municipio de Tierralta. Los datos se recolectaron mediante grupos focales, talleres, entrevistas, observación participante y juego de roles. Las necesidades de aprendizaje para la formación sexual de los jóvenes están encaminadas en el deseo que tienen de conocer acerca del noviazgo, el amor, manifestaciones de afecto, lo que siente una persona con VIH y lo que se experimenta cuando se está en embarazo. Además, se puede aseverar que la visión patriarcal y el contexto sociocultural marcan los imaginarios sexuales de la población joven.

Determination of the 3d34d and 3d35s configurations of Fe V

International Nuclear Information System (INIS)

Azarov, V.I.

2001-01-01

The analysis of the spectrum of four times ionized iron, Fe V, has led to the determination of the 3d 3 4d and 3d 3 5s configurations. From 975 classified lines in the region 645-1190 A we have established 123 of 168 theoretically possible 3d 3 4d levels and 26 of 38 possible 3d 3 5s levels. The estimated accuracy of values of energy levels of these two configurations is about 0.7 cm -1 and 1.0 cm -1 , respectively. The level structure of the system of the 3d 4 , 3d 3 4s, 3d 3 4d and 3d 3 5s configurations has been theoretically interpreted and the energy parameters have been determined by a least squares fit to the observed levels. A comparison of parameters in Cr III and Fe V ions is given. (orig.)

Modelo estructural para evaluar el estrés en profesionales que orientan a la niñez en programas de formación inclusiva

Directory of Open Access Journals (Sweden)

Henry de Jesús Gallardo Pérez

2018-04-01

Full Text Available La investigación tuvo por objetivo crear un modelo estructura asociado a establecer la validez y fiabilidad de escala para evaluar el estrés en docentes de instituciones educativas que orientan clases a niños en situación de discapacidad. Método: Estudio descriptivo de corte transversal, analiza validez de constructo a través de análisis factorial confirmatorio, correlación y comparación; la consistencia interna se estimó mediante el coeficiente alfa de cronbach. La muestra estuvo constituida por 107 participantes seleccionados de la población de docentes de instituciones educativas públicas y privadas del municipio de Cúcuta, Colombia. Resultados: fiabilidad y validez alta para el diagnóstico de estrés en docentes, escala conformada por 70 ítems Conclusión: empatía, autoconcepto, ansiedad, competencias y depresión, son factores correlacionados explicativos del estrés en profesionales.

Axionic D3-D7 Inflation

CERN Document Server

Burgess, C P; Postma, M

2009-01-01

We study the motion of a D3 brane moving within a Type IIB string vacuum compactified to 4D on K3 x T_2/Z_2 in the presence of D7 and O7 planes. We work within the effective 4D supergravity describing how the mobile D3 interacts with the lightest bulk moduli of the compactification, including the effects of modulus-stabilizing fluxes. We seek inflationary solutions to the resulting equations, performing our search numerically in order to avoid resorting to approximate parameterizations of the low-energy potential. We consider uplifting from D-terms and from the supersymmetry-breaking effects of anti-D3 branes. We find examples of slow-roll inflation (with anti-brane uplifting) with the mobile D3 moving along the toroidal directions, falling towards a D7-O7 stack starting from the antipodal point. The inflaton turns out to be a linear combination of the brane position and the axionic partner of the K3 volume modulus, and the similarity of the potential along the inflaton direction with that of racetrack inflat...

3D Volume Rendering and 3D Printing (Additive Manufacturing).

Science.gov (United States)

Katkar, Rujuta A; Taft, Robert M; Grant, Gerald T

2018-07-01

Three-dimensional (3D) volume-rendered images allow 3D insight into the anatomy, facilitating surgical treatment planning and teaching. 3D printing, additive manufacturing, and rapid prototyping techniques are being used with satisfactory accuracy, mostly for diagnosis and surgical planning, followed by direct manufacture of implantable devices. The major limitation is the time and money spent generating 3D objects. Printer type, material, and build thickness are known to influence the accuracy of printed models. In implant dentistry, the use of 3D-printed surgical guides is strongly recommended to facilitate planning and reduce risk of operative complications. Copyright © 2018 Elsevier Inc. All rights reserved.

3D object-oriented image analysis in 3D geophysical modelling

DEFF Research Database (Denmark)

Fadel, I.; van der Meijde, M.; Kerle, N.

2015-01-01

Non-uniqueness of satellite gravity interpretation has traditionally been reduced by using a priori information from seismic tomography models. This reduction in the non-uniqueness has been based on velocity-density conversion formulas or user interpretation of the 3D subsurface structures (objects......) based on the seismic tomography models and then forward modelling these objects. However, this form of object-based approach has been done without a standardized methodology on how to extract the subsurface structures from the 3D models. In this research, a 3D object-oriented image analysis (3D OOA......) approach was implemented to extract the 3D subsurface structures from geophysical data. The approach was applied on a 3D shear wave seismic tomography model of the central part of the East African Rift System. Subsequently, the extracted 3D objects from the tomography model were reconstructed in the 3D...

Craniofacial duplication (diprosopus) with trioftalmos, diagnosed by 3D obstetric ultrasound

OpenAIRE

Pachajoa, Harry; Vargas, Carolina; López-Morales, Marisol; Isaza, Carolina; Quintero-Mejía, Juan Carlos

2016-01-01

La duplicación cráneo-facial (diprosopus) es el resultado de la forma menos común de gemelos acoplados. La utilización de la ecografía 3D para el diagnóstico de esta patología ha sido reportada. Se presenta el segundo caso de esta patología en Colombia. Caso clínico de hijo de madre de 28 años a quien se le realizó diagnóstico prenatal con ecografía 3D, de duplicación craneofacial y de la columna vertebral. Cariotipo prenatal bandeo G: 46, XX. Al nacimiento se encontró feto de sexo femenino c...

3D IBFV : Hardware-Accelerated 3D Flow Visualization

NARCIS (Netherlands)

Telea, Alexandru; Wijk, Jarke J. van

2003-01-01

We present a hardware-accelerated method for visualizing 3D flow fields. The method is based on insertion, advection, and decay of dye. To this aim, we extend the texture-based IBFV technique for 2D flow visualization in two main directions. First, we decompose the 3D flow visualization problem in a

3D IBFV : hardware-accelerated 3D flow visualization

NARCIS (Netherlands)

Telea, A.C.; Wijk, van J.J.

2003-01-01

We present a hardware-accelerated method for visualizing 3D flow fields. The method is based on insertion, advection, and decay of dye. To this aim, we extend the texture-based IBFV technique presented by van Wijk (2001) for 2D flow visualization in two main directions. First, we decompose the 3D

Eficacia de un programa cognitivo conductual para la disminución de los niveles de presión arterial

Directory of Open Access Journals (Sweden)

Marcela Arrivillaga Quintero

2007-01-01

Full Text Available Este artículo presenta la eficacia de un programa de intervención cognitivo conductual para la disminución de los niveles de presión arterial, a partir de un estudio cuasiexperimental con dos grupos intactos -experimental y control-, medidas pre y post intervención y análisis intra e intergrupo. La muestra estuvo conformada por 94 pacientes que asisten a control médico por hipertensión arterial en una institución de salud de la ciudad de Cali, Colombia. Se utilizaron como medidas los niveles de presión arterial sistólica y presión arterial diastólica, la Escala de estrés percibido y el Cuestionario de adherencia al tratamiento para casos de hipertensión arterial. La intervención logró disminuir significativamente los niveles de presión arterial sistólica, mantuvo controlados los niveles de presión arterial diastólica, disminuyó el nivel de estrés percibido e incrementó significativamente la adherencia al tratamiento. Los resultados del estudio respaldan la eficacia de las intervenciones cognitivo conductuales para el manejo de la hipertensión arterial.

Acute D2/D3 dopaminergic agonism but chronic D2/D3 antagonism prevents NMDA antagonist neurotoxicity.

Science.gov (United States)

Farber, Nuri B; Nemmers, Brian; Noguchi, Kevin K

2006-09-15

Antagonists of the N-methyl-D-aspartate (NMDA) glutamate receptor, most likely by producing disinhibtion in complex circuits, acutely produce psychosis and cognitive disturbances in humans, and neurotoxicity in rodents. Studies examining NMDA Receptor Hypofunction (NRHypo) neurotoxicity in animals, therefore, may provide insights into the pathophysiology of psychotic disorders. Dopaminergic D2 and/or D3 agents can modify psychosis over days to weeks, suggesting involvement of these transmitter system(s). We studied the ability of D2/D3 agonists and antagonists to modify NRHypo neurotoxicity both after a one-time acute exposure and after chronic daily exposure. Here we report that D2/D3 dopamine agonists, probably via D3 receptors, prevent NRHypo neurotoxicity when given acutely. The protective effect with D2/D3 agonists is not seen after chronic daily dosing. In contrast, the antipsychotic haloperidol does not affect NRHypo neurotoxicity when given acutely at D2/D3 doses. However, after chronic daily dosing of 1, 3, or 5 weeks, haloperidol does prevent NRHypo neurotoxicity with longer durations producing greater protection. Understanding the changes that occur in the NRHypo circuit after chronic exposure to dopaminergic agents could provide important clues into the pathophysiology of psychotic disorders.

3D Semantic Modeling of Indoor Environments based on Point Clouds and Contextual Relationships

Directory of Open Access Journals (Sweden)

Angie Quijano

2016-10-01

Conclusiones: se presenta un método para el etiquetado semántico 3D de escenas en interiores basado en relaciones contextuales entre los objetos. Las reglas contextuales usadas para clasificación y etiquetado permiten un buen entendimiento del proceso y, también, una identificación de las razones por las que se presentan algunos errores en el etiquetado. El tiempo de respuesta del algoritmo es corto y la exactitud alcanzada es satisfactoria. Además, los requerimientos computacionales no son altos.

Electrochromic behavior of poly(3,5-bis(4-bromophenyl)dithieno[3,2-b;2',3'-d]thiophene)

International Nuclear Information System (INIS)

Osken, Ipek; Bildirir, Hakan; Ozturk, Turan

2011-01-01

Electropolymerization of 3,5-bis(4-bromophenyl)dithieno[3,2-b;2',3'-d]thiophene, having a mild electron-withdrawing bromine atom attached to the para position of the two phenyl groups of dithienothiophene, was performed, utilizing a potentiodynamic method. The resultant homopolymer was characterized by cyclic volyammetry, fourier transform infrared and ultraviolet-visible spectroscopy. Spectroelectrochemical and electrochromic properties were investigated and a device was constructed with polyethylenedioxythiophene to understand the characteristics in detail, which had the potential range of 0.0-2.0 V for operating the device between green and blue colors. It had a good optical contrast of 18% with a switching time of less than a second. Moreover, open circuit memory and stability of the device were investigated.

Characterizing 3D sensors using the 3D modulation transfer function

Science.gov (United States)

Kellner, Timo; Breitbarth, Andreas; Zhang, Chen; Notni, Gunther

2018-03-01

The fields of optical 3D measurement system applications are continuously expanding and becoming more and more diverse. To evaluate appropriate systems for various measurement tasks, comparable parameters are necessary, whereas the 3D modulation transfer function (3D-MTF) has been established as a further criterion. Its aim is the determination of the system response between the measurement of a straight, sharp-edged cube and its opposite ideal calculated one. Within the scope of this work simulations and practical investigations regarding the 3D-MTF’s influences and its main issues are specifically investigated. Therefore, different determined edge radii representing the high-frequency spectra lead to various decreasing 3D-MTF characteristics. Furthermore, rising sampling frequencies improve its maximum transfer value to a saturation point in dependence of the radius. To approve these results of previous simulations, three fringe projection scanners were selected to determine the diversity. As the best 3D-MTF characteristic, a saturated transfer value of H_3D( f_N, 3D) = 0.79 has been identified at a sufficient sampling frequency, which is reached at four times the Nyquist limit. This high 3D resolution can mainly be achieved due to an improved camera projector interaction. Additionally, too small sampling ratios lead to uncertainties in the edge function determination, while higher ratios do not show major improvements. In conclusion, the 3D-MTF algorithm has thus been practically verified and its repeatability as well as its robustness have been confirmed.

Aspects of defects in 3d-3d correspondence

International Nuclear Information System (INIS)

Gang, Dongmin; Kim, Nakwoo; Romo, Mauricio; Yamazaki, Masahito

2016-01-01

In this paper we study supersymmetric co-dimension 2 and 4 defects in the compactification of the 6d (2,0) theory of type A_N_−_1 on a 3-manifold M. The so-called 3d-3d correspondence is a relation between complexified Chern-Simons theory (with gauge group SL(N,ℂ)) on M and a 3d N=2 theory T_N[M]. We study this correspondence in the presence of supersymmetric defects, which are knots/links inside the 3-manifold. Our study employs a number of different methods: state-integral models for complex Chern-Simons theory, cluster algebra techniques, domain wall theory T[SU(N)], 5d N=2 SYM, and also supergravity analysis through holography. These methods are complementary and we find agreement between them. In some cases the results lead to highly non-trivial predictions on the partition function. Our discussion includes a general expression for the cluster partition function, which can be used to compute in the presence of maximal and certain class of non-maximal punctures when N>2. We also highlight the non-Abelian description of the 3d N=2T_N[M] theory with defect included, when such a description is available. This paper is a companion to our shorter paper http://dx.doi.org/10.1088/1751-8113/49/30/30LT02, which summarizes our main results.

Estrategias utilizadas por los docentes para promover el aprendizaje de la biología a nivel universitario

Directory of Open Access Journals (Sweden)

Adriana C. Vera

2011-09-01

Full Text Available El propósito de este artículo es divulgar los resultados de la investigación,cuyo objetivo fue identificar los tipos de estrategias utilizadas por los docentes para promover el aprendizaje en biología. Las teorías que sirvieron de apoyo fueron los aportes de Díaz y Hernández (2007, Ausubel et al. (1991, entre otros. La investigación se llevó a cabo en la Escuela de Educación, Mención Biología de la Universidad del Zulia; fue de tipo descriptiva, con diseño de campo, no experimental y transversal. La población estuvo conformada por 1050 estudiantes, la muestra fue de 91 estudiantes estratificados por semestres, para el segmento de profesores fue población censal de 16 docentes. La técnica utilizada para recolectar la información fue la encuesta; el instrumento, un cuestionario con 12 itemes, validado por expertos en el área, con una confiabilidad de 0.93 determinada a través del método Alfa de Cronbach. Para analizar los datos se utilizó la estadística descriptiva a través de medias aritméticas. Se concluye que existe baja presencia de las estrategias para la promoción del aprendizaje significativo, por lo que se recomienda considerar al proceso educativo como hecho humano y social gestiona do por el profesor, quien debe planificar y desarrollar las actividades innovadoras,creativas, dejando a un lado la postura tradicionalista en el aula para que se logre el aprendizaje significativo esperado en el área de la Biología.

D3-??????????????????????? ? ???? ?????????? ?2 ?????? ?????? ?????

OpenAIRE

?????????, ????; ???????, ???????; ??????, ?????????; ?????????????, ????; ??????, ??????

2011-01-01

????? ?????? ??????? ????? ????? ??????????? ?????? ?????? ????? ? ?????? ? ???????? ????? ?????????. ?????????? ???????????? ?????? ?? ?2 ?????? ?????? ????? ??????? ?? D3 ???????????????? ??????? ??????????? ?????? ????????? ????? ?????????? ??? ??? ??????????. ? ????? ????????????? ??????????? ??? ????????? ????????????? ?????????? ???? ?????????? ?????????? ????? ????????? ?????? ???????? ?? D3-????????????????? ???????.

Photoaffinity labeling of serum vitamin D binding protein by 3-deoxy-3-azido-25-hydroxyvitamin D3

International Nuclear Information System (INIS)

Link, R.P.; Kutner, A.; Schnoes, H.K.; DeLuca, H.F.

1987-01-01

3-Deoxy-3-azido-25-hydroxyvitamin D3 was covalently incorporated in the 25-hydroxyvitamin D3 binding site of purified human plasma vitamin D binding protein. Competition experiments showed that 3-deoxy-3-azido-25-hydroxyvitamin D3 and 25-hydroxyvitamin D3 bind at the same site on the protein. Tritiated 3-deoxy-3-azido-25-hydroxyvitamin D3 was synthesized from tritiated 25-hydroxyvitamin D3, retaining the high specific activity of the parent compound. The tritiated azido label bound reversibly to human vitamin D binding protein in the dark and covalently to human vitamin D binding protein after exposure to ultraviolet light. Reversible binding of tritiated 3-deoxy-3-azido-25-hydroxyvitamin D3 was compared to tritiated 25-hydroxyvitamin D3 binding to human vitamin D binding protein. Scatchard analysis of the data indicated equivalent maximum density binding sites with a KD,app of 0.21 nM for 25-hydroxyvitamin D3 and a KD,app of 1.3 nM for the azido derivative. Covalent binding was observed only after exposure to ultraviolet irradiation, with an average of 3% of the reversibly bound label becoming covalently bound to vitamin D binding protein. The covalent binding was reduced 70-80% when 25-hydroxyvitamin D3 was present, indicating strong covalent binding at the vitamin D binding site of the protein. When tritiated 3-deoxy-3-azido-25-hydroxyvitamin D3 was incubated with human plasma in the absence and presence of 25-hydroxyvitamin D3, 12% of the azido derivative was reversibly bound to vitamin D binding protein. After ultraviolet irradiation, four plasma proteins covalently bound the azido label, but vitamin D binding protein was the only protein of the four that was unlabeled in the presence of 25-hydroxyvitamin D3

3D for free using the Mac's standard apps : converting raw 3D text files to QuickDraw 3D's 3DMF format using AppleScript

NARCIS (Netherlands)

Djajadiningrat, J.P.

2003-01-01

This article introduces you to the basics of 3D files in general and the 3D Metafile (3DMF), QuickDraw 3D's native 3D format, in particular. It shows how you can use AppleScript to easily convert a raw 3D text file into a 3DMF readable by the QuickDraw 3D Viewer or any other QuickDraw 3D compatible

Construcción y validación de un instrumento exploratorio que haga parte del proceso de evaluación del Trastorno por Déficit de Atención con Hiperactividad en niños de las edades de 7 a 10 años de la población de Tunja

OpenAIRE

Sotomonte Ariza, Sonia Marcela; Jiménez Mendoza, Gina Lorena; Cárdenas Niño, Lucila

2011-01-01

El propósito de esta investigación de tipo tecnológica psicométrica, fue construir y validar un instrumento que hiciera parte del proceso exploratorio del trastorno por déficit de atención con hiperactividad (TDAH) llamada Escala del Trastorno por Déficit de Atención con Hiperactividad (ETDAH). La muestra estuvo conformada por padres y maestros de 315 niños de 7 a 10 años de seis colegios de Tunja. El instrumento comprendió una escala para padres con una confiabilidad de 0,93, una validez de ...

Influencia de la terapia periodontal no quirúrgica en nivel de pH salival y líquido crevicular gingival en pacientes con enfermedad periodontal atendidos en la Clínica Especializada de la FO-USMP

OpenAIRE

Villaverde Moscol, Lizeth Rosario

2016-01-01

Determina la influencia de la terapia periodontal no quirúrgica en el nivel de pH salival y el pH líquido crevicular gingival en los pacientes con enfermedad periodontal atendidos en la Clínica Especializada de FO-USMP. La muestra fue conformada por 64 pacientes. Se utilizó tiras reactivas para la recolección del pH salival y pH del líquido crevicular gingival antes y después (07 días) de realizado el terapia periodontal no quirúgica en los pacientes diagnosticados con dos de los tipos de enf...

Aplicación Android con tablón de anuncios ordenados enfocado a la impresión 3D

OpenAIRE

KYRCH, RUSLAN

2017-01-01

[ES] Diseño e implementación de aplicación Android destinada para poner en contacto propietarios de impresoras 3D con usuarios que precisen de estas para sus impresiones. Los dueños de las impresoras podrán crear anuncios ofreciendo información de su impresora, detalles técnicos, imágenes de sus diseños impresos e información de contacto. Los usuarios de la aplicación que deseen dar forma a sus diseños 3D podrán navegar en el tablón principal donde estarán los anuncios ordenado...

3D Elevation Program—Virtual USA in 3D

Science.gov (United States)

Lukas, Vicki; Stoker, J.M.

2016-04-14

The U.S. Geological Survey (USGS) 3D Elevation Program (3DEP) uses a laser system called ‘lidar’ (light detection and ranging) to create a virtual reality map of the Nation that is very accurate. 3D maps have many uses with new uses being discovered all the time.  

Bioanálisis predictivo de tolerancia dérmica de cosméticos para bebés in vivo

Directory of Open Access Journals (Sweden)

Flor Ángela Tobón Marulanda

Full Text Available Objetivo: prever el riesgo potencial de irritabilidad dérmica de una crema y una loción para bebés, con el fin de obtener el registro sanitario y disminuir la eventualidad de riesgo para la salud. Métodos: se realizó el bioanálisis predictivo de tolerancia dérmica in vivo en conejos, a través de un estudio de tipo exploratorio clínico cualitativo e histopatológico, basado en el enfoque de la ley del Arte para explicar el riesgo/efectividad comparable en humanos. Se aplicó la técnica de exposición aguda simple (prueba parche oclusivo en seis conejos, por cada producto. Se estimaron los efectos dérmicos mediante una escala de valores que define la probabilidad de inseguridad atribuible por la exposición al cosmético, según prueba de toxicidad dérmica de la Organización para la Cooperación Económica y Desarrollo 2004 (OCED, con ciertas modificaciones por los autores. Resultados: en el bioanálisis se encontró cierta irritabilidad dérmica en la piel de los conejos al aplicarles el cosmético en una dosis única por 92 días. El estudio clínico se complementó con el análisis histopatológico de una muestra de piel irritada y no mostró cambios significativos a los observados. Conclusiones: el bioanálisis clínico e histopatológico permite inferir una irritabilidad dérmica entre insignificante y leve, lo que sugiere la necesidad de mejorar la formulación de los cosméticos estudiados para obtener el registro sanitario, y así alertar tempranamente al productor y a la comunidad de la seguridad y eficacia de los productos.

3D Animation Essentials

CERN Document Server

Beane, Andy

2012-01-01

The essential fundamentals of 3D animation for aspiring 3D artists 3D is everywhere--video games, movie and television special effects, mobile devices, etc. Many aspiring artists and animators have grown up with 3D and computers, and naturally gravitate to this field as their area of interest. Bringing a blend of studio and classroom experience to offer you thorough coverage of the 3D animation industry, this must-have book shows you what it takes to create compelling and realistic 3D imagery. Serves as the first step to understanding the language of 3D and computer graphics (CG)Covers 3D anim

3DSEM: A 3D microscopy dataset

Directory of Open Access Journals (Sweden)

Ahmad P. Tafti

2016-03-01

Full Text Available The Scanning Electron Microscope (SEM as a 2D imaging instrument has been widely used in many scientific disciplines including biological, mechanical, and materials sciences to determine the surface attributes of microscopic objects. However the SEM micrographs still remain 2D images. To effectively measure and visualize the surface properties, we need to truly restore the 3D shape model from 2D SEM images. Having 3D surfaces would provide anatomic shape of micro-samples which allows for quantitative measurements and informative visualization of the specimens being investigated. The 3DSEM is a dataset for 3D microscopy vision which is freely available at [1] for any academic, educational, and research purposes. The dataset includes both 2D images and 3D reconstructed surfaces of several real microscopic samples. Keywords: 3D microscopy dataset, 3D microscopy vision, 3D SEM surface reconstruction, Scanning Electron Microscope (SEM

Incorporación de las TIC en las prácticas educativas: el caso de las herramientas, recursos, servicios y aplicaciones digitales de Internet para la mejora de los procesos de aprendizaje escolar

Directory of Open Access Journals (Sweden)

Hugo Moreno Reyes

2016-01-01

Full Text Available Este artículo se deriva del trabajo de investigación realizado para la incorporación de las TIC en las prácticas educativas a partir de la clasificación de los diferentes recursos de Internet de uso más común en este ámbito. Para ello, se retoma y se adapta la clasificación planteada por Puente, Ballesteros y Palazón (2002 que está conformada por tres categorías de utilización de los recursos de Internet: para la comunicación, para la organización y para la documentación. Con base en esta clasificación y resultado de la investigación se presenta una visión más precisa y orientada hacia la utilización de los recursos de Internet en los procesos de enseñanza y aprendizaje, lo cual es un punto clave que contribuye al uso apropiado de las TIC en la educación. Por lo que, este trabajo puede resultar de utilidad a los profesores para la incorporación de los recursos de Internet en el rediseño de los procesos de aprendizaje escolar.

Entorno 3D para el análisis y la recreación virtual de las actuaciones arqueológicas en Cueva de la Cocina (Dos Aguas, Valencia, España)

OpenAIRE

Agustín Diez Castillo; Alfredo Cortell Nicolau; Oreto García Puchol; Pilar Esribá Ruiz

2017-01-01

[EN] In this paper we present our procedure for digitising fieldwork information on the fly (data management), and its combination with the virtual reconstruction of the stratigraphy (virtualisation), of the Cueva de la Cocina site in Dos Aguas (Valencia, Spain). The main tool for the Geographic Information System (GIS) implementation has been OpenJUMP, whilst for the three-dimensional (3D) recreation of the cave virtual environment MeshLab, ParaView, CloudCompare and R open software have bee...

Interfaz cerebro computador basada en P300 para la comunicación alternativa: estudio de caso en dos adolescentes en situación de discapacidad motora

Directory of Open Access Journals (Sweden)

Eliana García Cossio

2011-01-01

Full Text Available Las interfaces cerebro computador son sistemas que a partir del uso de las señales cerebrales hacen posible, que personas en situación de discapacidad motora severa, puedan controlar dispositivos externos, como: comunicadores, sillas de ruedas, entre otros. En este estudio piloto se describe cómo dos jóvenes con discapacidad motora, fueron entrenados para aprender a usar una Interfaz cerebro-computador (ICC controlada por el potencial evocado P300 a partir de electoencefalografía (EEG, para la comunicación alternativa de modo verbal. Se hizo uso de una matriz de estimulación de 4x3 (filas - columnas que contenía imágenes de jugadores de fútbol actuales. En primer lugar se realizaron unas pruebas de preparación que permitieron a los usuarios conocer el funcionamiento del sistema ICC. Seguido a esto se llevaron a cabo las pruebas reales que estaban conformadas por dos secciones: la sección de entrenamiento y la sección de pruebas de libre deletreo, en donde la persona podía seleccionar los íconos que deseara de la matriz a partir de uso de sus ondas de EEG. Los niveles promedio de porcentaje de acierto para cada uno de los usuarios en la prueba de libre deletreo fueron de 95% y 85%, respectivamente. El promedio de tiempo de elección de cada ícono fue de 36 segundos (1,67 letras por minuto.

Phase correction for three-dimensional (3D) diffusion-weighted interleaved EPI using 3D multiplexed sensitivity encoding and reconstruction (3D-MUSER).

Science.gov (United States)

Chang, Hing-Chiu; Hui, Edward S; Chiu, Pui-Wai; Liu, Xiaoxi; Chen, Nan-Kuei

2018-05-01

Three-dimensional (3D) multiplexed sensitivity encoding and reconstruction (3D-MUSER) algorithm is proposed to reduce aliasing artifacts and signal corruption caused by inter-shot 3D phase variations in 3D diffusion-weighted echo planar imaging (DW-EPI). 3D-MUSER extends the original framework of multiplexed sensitivity encoding (MUSE) to a hybrid k-space-based reconstruction, thereby enabling the correction of inter-shot 3D phase variations. A 3D single-shot EPI navigator echo was used to measure inter-shot 3D phase variations. The performance of 3D-MUSER was evaluated by analyses of point-spread function (PSF), signal-to-noise ratio (SNR), and artifact levels. The efficacy of phase correction using 3D-MUSER for different slab thicknesses and b-values were investigated. Simulations showed that 3D-MUSER could eliminate artifacts because of through-slab phase variation and reduce noise amplification because of SENSE reconstruction. All aliasing artifacts and signal corruption in 3D interleaved DW-EPI acquired with different slab thicknesses and b-values were reduced by our new algorithm. A near-whole brain single-slab 3D DTI with 1.3-mm isotropic voxel acquired at 1.5T was successfully demonstrated. 3D phase correction for 3D interleaved DW-EPI data is made possible by 3D-MUSER, thereby improving feasible slab thickness and maximum feasible b-value. Magn Reson Med 79:2702-2712, 2018. © 2017 International Society for Magnetic Resonance in Medicine. © 2017 International Society for Magnetic Resonance in Medicine.

EUROPEANA AND 3D

Directory of Open Access Journals (Sweden)

D. Pletinckx

2012-09-01

Full Text Available The current 3D hype creates a lot of interest in 3D. People go to 3D movies, but are we ready to use 3D in our homes, in our offices, in our communication? Are we ready to deliver real 3D to a general public and use interactive 3D in a meaningful way to enjoy, learn, communicate? The CARARE project is realising this for the moment in the domain of monuments and archaeology, so that real 3D of archaeological sites and European monuments will be available to the general public by 2012. There are several aspects to this endeavour. First of all is the technical aspect of flawlessly delivering 3D content over all platforms and operating systems, without installing software. We have currently a working solution in PDF, but HTML5 will probably be the future. Secondly, there is still little knowledge on how to create 3D learning objects, 3D tourist information or 3D scholarly communication. We are still in a prototype phase when it comes to integrate 3D objects in physical or virtual museums. Nevertheless, Europeana has a tremendous potential as a multi-facetted virtual museum. Finally, 3D has a large potential to act as a hub of information, linking to related 2D imagery, texts, video, sound. We describe how to create such rich, explorable 3D objects that can be used intuitively by the generic Europeana user and what metadata is needed to support the semantic linking.

Estado de la gerencia de proyectos en PYMES del sector artes gráficas y propuestas de lineamientos para su mejoramiento

Directory of Open Access Journals (Sweden)

Óscar Rubiano Ovalle

2012-06-01

Full Text Available El propósito de este artículo es presentar los resultados de una investigación mediante la cual se diagnosticó el estado de la gerencia de proyectos en un grupo de empresas del sector artes gráficas de la ciudad de Cali. En una población conformada por 30 empresas catalogadas como MIPYME, de acuerdo con la Ley 905 del 2004, se aplicó un instrumento basado en los modelos de madurez de gerencia de proyectos más referenciados, como el Organizational Project Management Maturity Model (OPM3 y el Programme and Project Management Maturity Model (P3M3. El instrumento, respondido en entrevistas personales por gerentes y jefes de producción, permitió detectar que en términos generales existe un bajo nivel de la gerencia de proyectos que permita identificar, evaluar y ejecutar proyectos exitosamente y que a su vez generen un impacto estratégico para las organizaciones. En vista de los resultados, en este artículo se expone un marco de lineamientos que propicie la adherencia de las pequeñas y medianas empresas a una metodología de proyectos aliado a una gestión estratégica.

Procedure for making mannequins tailor for image quality control of PET by 3D printing systems; Procedimiento para la fabricacion de maniquies a medida, para control de calidad de imagen PET, mediante sistemas de impresion 3D

Energy Technology Data Exchange (ETDEWEB)

Collado Chamorro, P. M.; Saez Beltran, F.; Diaz Pascual, V.; Benito Bejarado, M. A.; Sanz Freire, C. J.; Lopo Casqueiro, N.; Gonzalez Fernandez, M. P.; Lopez de Gamarra, M. S.

2015-07-01

There is a software free both for be the processes of modeling of the objects 3D to split of medical images, as for convert said modeling to file ready for be read and executed by the 3D printers (sequence or slicer). This lets make mannequins of Control of quality with a investment minimum. In this work is built a mannequin of brain refillable to measurement for be used in studies PET. (Author)

TOMOGRAFÍA DE RESISTIVIDAD ELÉCTRICA 3D EN LA CATEDRAL DE MORELIA, MÉXICO (3D Electrical Resistivity Tomography in Morelia Cathedral, Mexico

Directory of Open Access Journals (Sweden)

Gerardo Cifuentes-Nava

2017-12-01

Full Text Available La tradición oral en la ciudad de Morelia, México, así como evidencias parciales en algunos edificios, han llevado a la creencia de la existencia de túneles subterráneos en el centro de esta ciudad, los cuales pertenecerían a la época colonial de nuestro país. Dicho centro fue declarado patrimonio cultural de la humanidad en 1991 por la UNESCO, por lo que es poco factible la excavación o perforación directa destructiva con la intención de explorar. En este contexto, la implementación de técnicas no invasivas es perfecta para localizar zonas de interés, de tal forma que los métodos de exploración geofísica son adecuados, al no ser destructivos y proporcionar una imagen del subsuelo para corroborar la existencia indirecta de estructuras en profundidad. Se presentan los estudios con tomografía de resistividad eléctrica tridimensional (TRE-3D llevados a cabo en 2014, 2016 y 2017 en la Catedral de Morelia y su frente norte, en donde se pueden ubicar estructuras organizadas no acordes con el entorno geológico del sitio, los cuales pueden suministrar indicios de la existencia de diversas estructuras de origen antrópico. La TRE-3D aplicada para este estudio es una combinación entre metodologías convencionales y no convencionales; ofrece una imagen de la distribución de estructuras en profundidad que muestran características concordantes con tradiciones orales y hechos históricos documentados referentes al desarrollo de la Catedral de Morelia a través del tiempo. ENGLISH: Oral traditions, as well as partial evidence in some buildings, have led to a belief in the existence of underground tunnels dating to the colonial period in downtown Morelia, Mexico. The city of Morelia was declared a UNESCO World Heritage Site in 1991, making excavation impossible. Nondestructive geophysical exploration methods, however, can provide an image of the subsoil to test for existence of tunnels or other subterranean structures. This paper reports

Usabilidad de sitios web para la transparencia de la gestión en alcaldía

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Dra. Nora Belloso de Núñez

2015-09-01

Full Text Available La información representa un elemento esencial para la gestión pública, porque permite a sus gestores el manejo eficiente de sus recursos financieros, al tiempo que la usan para informar sobre acciones ejecutadas y rendición de cuentas, utilizando para ello medios comunicacionales como los sitios web en su interés por apoyar la democratización y transparencia de la gestión. El presente trabajo analiza la usabilidad de los sitios web para transparentar la gestión en alcaldías del estado Zulia, Venezuela. Con una investigación descriptiva y la aplicación de dos tipos de instrumentos en las alcaldías de Lagunillas, Cabimas, San Francisco, Mara y Maracaibo. Los resultados evidencian que: a los sitios web presentan diseño amigable, lenguaje comprensible y libertad de acceso al no presentar condición, ni clave para el uso de la información presentada, b la difusión y disponibilidad de la información pública es considerada una manera de rendir cuentas y c la calidad del contenido de los sitios web revisados se direcciona más a noticias y publicidad de acciones cumplidas por los gobernantes, sin responder a políticas formales y necesidades informacionales de los ciudadanos. Se concluye que la usabilidad de los sitios web en los gobiernos locales presenta debilidades en cuanto a su contenido, debido a que los insumos suministrados para su elaboración es decisión de las autoridades de turno y la usabilidad es efectiva, si la trilogía conformada por diseño del sitio, rendición de cuentas y accesibilidad a la información actúan de manera sistémica y equilibrada

Digitalizador 3D para imagens antropométricas do pé

OpenAIRE

Bez, Marta R.; Seligman, Luiza; Estivalet, Patricia S.; Silva, Magalí P.

2006-01-01

Este artigo apresenta um sistema de hardware e software para extrair medidas de pés da população brasileira. Sabe-se que os pés são diferentes, dependendo de diversos fatores como sexo, idade, raça, etc. Atualmente, pouco se tem levado em consideração estas diferenças no processo de construção do calçado brasileiro. A idéia é, colher uma imagem plantar do pé através de um scanner e ao mesmo tempo cinco imagens laterais através de uma câmera giratória. A partir destas imagens obter medidas ...

From 3D view to 3D print

Science.gov (United States)

Dima, M.; Farisato, G.; Bergomi, M.; Viotto, V.; Magrin, D.; Greggio, D.; Farinato, J.; Marafatto, L.; Ragazzoni, R.; Piazza, D.

2014-08-01

In the last few years 3D printing is getting more and more popular and used in many fields going from manufacturing to industrial design, architecture, medical support and aerospace. 3D printing is an evolution of bi-dimensional printing, which allows to obtain a solid object from a 3D model, realized with a 3D modelling software. The final product is obtained using an additive process, in which successive layers of material are laid down one over the other. A 3D printer allows to realize, in a simple way, very complex shapes, which would be quite difficult to be produced with dedicated conventional facilities. Thanks to the fact that the 3D printing is obtained superposing one layer to the others, it doesn't need any particular work flow and it is sufficient to simply draw the model and send it to print. Many different kinds of 3D printers exist based on the technology and material used for layer deposition. A common material used by the toner is ABS plastics, which is a light and rigid thermoplastic polymer, whose peculiar mechanical properties make it diffusely used in several fields, like pipes production and cars interiors manufacturing. I used this technology to create a 1:1 scale model of the telescope which is the hardware core of the space small mission CHEOPS (CHaracterising ExOPlanets Satellite) by ESA, which aims to characterize EXOplanets via transits observations. The telescope has a Ritchey-Chrétien configuration with a 30cm aperture and the launch is foreseen in 2017. In this paper, I present the different phases for the realization of such a model, focusing onto pros and cons of this kind of technology. For example, because of the finite printable volume (10×10×12 inches in the x, y and z directions respectively), it has been necessary to split the largest parts of the instrument in smaller components to be then reassembled and post-processed. A further issue is the resolution of the printed material, which is expressed in terms of layers

MODELO PARA EL DESARROLLO DEL POTENCIAL HUMANO BASADO EN COMPETENCIAS PARA EL DESARROLLO DE LA ACTIVIDAD EMPRESARIAL, EN LA POBLACIÓN VULNERABLE DE SANTIAGO DE CALI

Directory of Open Access Journals (Sweden)

Luis Fernando Parra Villanueva

2010-01-01

Full Text Available El artículo es producto de la investigación "Modelo de gestión del potencial humano, basado en competencias, para el desarrollo de la actividad empresarial, en la población vulnerable de Santiago de Cali". Su objetivo general está enfocado en diseñar, estructurar e implementar un modelo de gestión del potencial humano, basado en competencias, en la población vulnerable de Santiago de Cali, tomando como base de estudio e implementación, las comunas 20 y 21, que posibilite mejorar su actividad empresarial, y contribuya al mejoramiento de su calidad de vida. Debido a que el desarrollo de la actividad empresarial que caracteriza a la población marginal de las grandes ciudades es precario, en particular, en la ciudad de Cali, en esta investigación se plantea el diseño de un modelo cuyas estrategias se fundamentan en: los modelos de Spin off, con las incubadoras o viveros empresariales, el aprendizaje continuo y colaborativo, la generación de unidades productivas de base tecnológica, la vinculación de agentes externos e internos de apoyo para integrar y dinamizar el modelo, para lo cual se estructura desde la Facultad de Ciencias Económicas Administrativas y Contables de la Universidad Libre Cali, un nodo que articula la unidad de emprendimiento, el centro de prácticas empresariales y el centro de investigaciones, igualmente se establecen los canales de interrelación estratégica con una red social de apoyo empresarial conformada por actores como: Gobierno, sector financiero, sector productivo y ONG.

Vitamin D3 and 25-hydroxyvitamin D3 in pork and their relationship to vitamin D status in pigs

DEFF Research Database (Denmark)

Burild, Anders; Lauridsen, Charlotte; Faqir, Nasrin

2016-01-01

The content of vitamin D in pork produced in conventional systems depends on the vitamin D concentration in the pig feed. Both vitamin D3 and 25-hydroxyvitamin D3 (25(OH)D3) are essential sources of dietary vitamin D; however, bioavailability assessed by serum 25(OH)D3 concentration is reported...... of vitamin D3 and 25(OH)D3 in the pig feed for 49 d before slaughter. Concurrently, the 25(OH)D3 level in serum was investigated as a biomarker to assess the content of vitamin D3 and 25(OH)D3 in pig tissues. Adipose tissue, white and red muscle, the liver and serum were sampled from pigs fed feed containing...... either vitamin D3 or 25(OH)D3 at 5, 20, 35 or 50 µg/kg feed for 7 weeks before slaughter. The tissue 25(OH)D3 level was significantly higher in the pigs fed 25(OH)D3 compared with those fed vitamin D3, while the tissue vitamin D3 level was higher in the pigs fed vitamin D3 compared with those fed 25(OH...

A 2D driven 3D vessel segmentation algorithm for 3D digital subtraction angiography data

International Nuclear Information System (INIS)

Spiegel, M; Hornegger, J; Redel, T; Struffert, T; Doerfler, A

2011-01-01

Cerebrovascular disease is among the leading causes of death in western industrial nations. 3D rotational angiography delivers indispensable information on vessel morphology and pathology. Physicians make use of this to analyze vessel geometry in detail, i.e. vessel diameters, location and size of aneurysms, to come up with a clinical decision. 3D segmentation is a crucial step in this pipeline. Although a lot of different methods are available nowadays, all of them lack a method to validate the results for the individual patient. Therefore, we propose a novel 2D digital subtraction angiography (DSA)-driven 3D vessel segmentation and validation framework. 2D DSA projections are clinically considered as gold standard when it comes to measurements of vessel diameter or the neck size of aneurysms. An ellipsoid vessel model is applied to deliver the initial 3D segmentation. To assess the accuracy of the 3D vessel segmentation, its forward projections are iteratively overlaid with the corresponding 2D DSA projections. Local vessel discrepancies are modeled by a global 2D/3D optimization function to adjust the 3D vessel segmentation toward the 2D vessel contours. Our framework has been evaluated on phantom data as well as on ten patient datasets. Three 2D DSA projections from varying viewing angles have been used for each dataset. The novel 2D driven 3D vessel segmentation approach shows superior results against state-of-the-art segmentations like region growing, i.e. an improvement of 7.2% points in precision and 5.8% points for the Dice coefficient. This method opens up future clinical applications requiring the greatest vessel accuracy, e.g. computational fluid dynamic modeling.

3D gaze tracking system for NVidia 3D Vision®.

Science.gov (United States)

Wibirama, Sunu; Hamamoto, Kazuhiko

2013-01-01

Inappropriate parallax setting in stereoscopic content generally causes visual fatigue and visual discomfort. To optimize three dimensional (3D) effects in stereoscopic content by taking into account health issue, understanding how user gazes at 3D direction in virtual space is currently an important research topic. In this paper, we report the study of developing a novel 3D gaze tracking system for Nvidia 3D Vision(®) to be used in desktop stereoscopic display. We suggest an optimized geometric method to accurately measure the position of virtual 3D object. Our experimental result shows that the proposed system achieved better accuracy compared to conventional geometric method by average errors 0.83 cm, 0.87 cm, and 1.06 cm in X, Y, and Z dimensions, respectively.

Generación de modelos 3D a partir de imágenes SEM (Scanning Electron Microscopy)

OpenAIRE

MÍNGUEZ HERNÁNDEZ, MARÍA TERESA

2017-01-01

[ES] Con la realización del presente trabajo, se pretenden obtener Modelos Digitales 3D (MD-3D) de imágenes de muy alta resolución obtenidas con un Microscopio Electrónico de Barrido (SEM), utilizando la técnica fotogramétrica Structure from Motion (SfM) mediante el software Agisoft-PhotoScan. El objetivo es comprobar si este tipo de software, que utiliza la técnica SfM, es apto para imágenes obtenidas con equipos SEM y generar Modelos 3D. Esto permitiría poder realizar impr...

Herramienta para el cálculo de personal de cuidado intensivo neonatal

Directory of Open Access Journals (Sweden)

Juan Guillermo Rojas

2011-01-01

Full Text Available La gestión del cuidado de enfermería supone la utilización de métodos y herramientas que de manera práctica permitan una aproximación a las necesidades de cuidado de los pacientes y ayuden a planear los requerimientos humanos y técnicos para tal fin. Objetivo: identificar la utilidad del Neonatal Therapeutic Intervention Scoring System (NTISS en el cálculo de personal de enfermería en la unidad de cuidado intensivo (UCIN e intermedio neonatal (UCEN de la Clínica Universitaria Bolivariana (CUB en Medellín, Colombia. Método: estudio descriptivo, transversal, realizado durante el mes de abril de 2007. La población estuvo conformada por los neonatos ingresados y hospitalizados en la UCIN y UCEN, para lo que fue necesario aplicar el instrumento al final de cada turno. Se calculó una muestra de 384 instrumentos (proporción desconocida y un intervalo de confianza de 0,5. La consistencia interna del instrumento se determinó con el alfa de Cronbach (0,8. Resultados: se recolectaron 425 instrumentos diligenciados de 22 neonatos. Las patologías más frecuentes fueron las de tipo respiratorio. El puntaje total de los NTISS analizados fue de 5.200 puntos, con un promedio de 12,3, equivalentes a 123 minutos de trabajo de enfermería por turno de 6 horas. Del total de intervenciones el 62% están asignadas a las enfermeras, el 22% a las auxiliares de enfermería y el 16% a terapia respiratoria. Se calculó el requerimiento de 4 enfermeras por turno en la UCIN y UCEN. Conclusiones: el NTISS es útil para la asignación y el cálculo del personal de enfermería y contribuye a mejorar los procesos de gestión del cuidado.

LandSIM3D: modellazione in real time 3D di dati geografici

Directory of Open Access Journals (Sweden)

Lambo Srl Lambo Srl

2009-03-01

Full Text Available LandSIM3D: realtime 3D modelling of geographic data LandSIM3D allows to model in 3D an existing landscape in a few hours only and geo-referenced offering great landscape analysis and understanding tools. 3D projects can then be inserted into the existing landscape with ease and precision. The project alternatives and impact can then be visualized and studied into their immediate environmental. The complex evolution of the landscape in the future can also be simulated and the landscape model can be manipulated interactively and better shared with colleagues. For that reason, LandSIM3D is different from traditional 3D imagery solutions, normally reserved for computer graphics experts. For more information about LandSIM3D, go to www.landsim3d.com.

Identification of the transition arrays 3d74s-3d74p in Br X and 3d64s-3d64p in Br XI

International Nuclear Information System (INIS)

Zeng, X.T.; Jupen, C.; Bengtsson, P.; Engstroem, L.; Westerlind, M.; Martinson, I.

1991-01-01

We report a beam-foil study of multiply ionized bromine in the region 400-1300A, performed with 6 and 8 MeV Br ions from a tandem accelerator. At these energies transitions belonging to Fe-like Br X and Mn-like Br XI are expected to be prominent. We have identified 31 lines as 3d 7 4s-3d 7 4p transitions in Br X, from which 16 levels of the previously unknown 3d 7 4s configuration could be established. We have also added 6 new 3d 7 4p levels to the 99 previously known. For Br XI we have classified 9 lines as 3d 6 4s-3d 6 4p combinations. The line identifications have been corroborated by isoelectronic comparisons and theoretical calculations using the superposition-of-configurations technique. (orig.)

¿Es equivalente la suplementación diaria con vitamina D2 o vitamina D3 en adultos mayores? Is daily supplementation with vitamin D2 equivalent to daily supplementation with vitamin D3 in the elderly?

Directory of Open Access Journals (Sweden)

Mariana Seijo

2012-06-01

Full Text Available Tanto la equivalencia entre colecalciferol (D3 y ergocalciferol (D2, como las dosis y forma de administración de ambos, son actualmente un tema controvertido. El objetivo de este estudio fue comparar la efectividad de 800 UI/día de D2 (gotas y D3 (comprimidos para alcanzar niveles adecuados de 25 hidroxivitamina D (25OHD (= 30 ng/ml. Veintiún mujeres posmenopáusicas que vivían en la Ciudad de Buenos Aires, edad promedio ( ± DS 77.1 ± 6.8 años fueron incluidas y asignadas en forma aleatoria a uno de los siguientes grupos: GD2 (n = 13: 800 UI (gotas y GD3 (n = 8: 800 UI (comprimidos. Se midió 25OHD sérica (RIA-DIASORIN basal y a los 7, 28 y 45 días del estudio. Basalmente, 19 de las 21 mujeres presentaron niveles de deficiencia de 25(OHD (The equivalence of cholecalciferol (D3 and ergocalciferol (D2 as well as their corresponding doses and administration route remain controversial to date. The aim of this study was to compare the effectiveness of daily supplementation with 800 IU of D2 (drops and D3 (pills on 25-hydroxivitamin D (25OHD levels (= 30 ng/ml. Twenty-one ambulatory postmenopausal women from Buenos Aires City with a mean ( ± SD age of 77.1 ± 6.8 years were included. The participants were randomly assigned to one of the following groups: GD2 (n = 13: 800 IU (drops and GD3 (n = 8: 800 IU (pills. Serum 25OHD levels were measured (RIA-DIASORIN at baseline, and at 7, 28 and 45 days. Nineteen out of twenty one women showed deficient levels of 25OHD at baseline (< 20 ng/ml: GD2: 14.0 ± 4.8 ng/ml and GD3: 13.2 ± 4.9 ng/ml (NS. Whereas only GD3 exhibited an increase (~25% at 7 days, both groups showed a significant increase at the end of the study. However, neither attained adequate 25OHD levels (GD2: 17.4 ± 5.5 vs. GD3:22.9 ± 4.6 ng/ml; p < 0.001. Administration of 800 IU of vitamin D3 during 45 days was more effective than D2 in increasing 25OHD, but both failed to achieve adequate levels of 25OHD (= 30 ng/ml. but neither

SISTEMA DE MEMORIA ORGANIZACIONAL PARA CENTROS I+D DE UNA INSTITUCIÓN DE EDUCACIÓN SUPERIOR

Directory of Open Access Journals (Sweden)

Ruth Reátegui

2015-01-01

Full Text Available El objetivo del artículo es proponer un modelo de Sistemas de Memoria Organizacional (SMO para un centro de Investigación y Desarrollo (I+D basado en cuatro componentes: social, cultural, tecnológico y de procesos para una IES de Ecuador. Las instituciones de educación superior (IES son organizaciones donde la investigación es una de sus actividades fundamentales que requiere una adecuada gestión del conocimiento. Para esta propuesta se utilizó un método de investigación inductiva basado en entrevistas a los docentes involucrados para conocer las actividades y procesos que conlleva el desarrollo de este tipo de proyectos. Los SMO permiten preservar el conocimiento para ser utilizarlo en las actividades actuales y futuras. Uno de los problemas encontrados es que no se está conservando ni mucho menos compartiendo el conocimiento que las personas poseen como resultado de experiencias, prácticas, actitudes, entre otros aspectos, relacionados con los proyectos. Además el modelo resultante se implementó en un sistema basado en software libre y tecnologías web. La implementación de este modelo muestra como resultado un alto nivel de aceptación por parte de directivos e inves tigadores de los centros de I+D

Investigation of the C-3-epi-25(OH)D3 of 25-hydroxyvitamin D3 in urban schoolchildren.

Science.gov (United States)

Berger, Samantha E; Van Rompay, Maria I; Gordon, Catherine M; Goodman, Elizabeth; Eliasziw, Misha; Holick, Michael F; Sacheck, Jennifer M

2018-03-01

The physiological relevance C-3 epimer of 25-hydroxyvitamin D (3-epi-25(OH)D) is not well understood among youth. The objective of this study was to assess whether demographic/physiologic characteristics were associated with 3-epi-25(OH)D 3 concentrations in youth. Associations between 3-epi-25(OH)D 3 and demographics and between 3-epi-25(OH)D 3 , total 25-hydroxyvitamin (25(OH)D) (25(OH)D 2 + 25(OH)D 3 ), total cholesterol, high-density lipoprotein, low-density lipoprotein, and triglycerides were examined in racially/ethnically diverse schoolchildren (n = 682; age, 8-15 years) at Boston-area urban schools. Approximately 50% of participants had detectable 3-epi-25(OH)D 3 (range 0.95-3.95 ng/mL). The percentage of 3-epi-25(OH)D 3 of total 25(OH)D ranged from 2.5% to 17.0% (median 5.5%). Males were 38% more likely than females to have detectable 3-epi-25(OH)D 3 concentrations. Both Asian and black race/ethnicity were associated with lower odds of having detectable 3-epi-25(OH)D 3 compared with non-Hispanic white children (Asian vs. white, odds ratio (OR) 0.28, 95% confidence interval (CI) 0.14-0.53; black vs. white, OR 0.38, 95%CI 0.23-0.63, p 30 ng/mL) 25(OH)D concentration was associated with higher odds of having detectable 3-epi-25(OH)D 3 than having an inadequate (<20 ng/mL) concentration (OR 4.78, 95%CI 3.23-6.94 or OR 14.10, 95%CI 7.10-28.0, respectively). There was no association between 3-epi-25(OH)D 3 and blood lipids. However, when considering 3-epi-25(OH)D 3 as a percentage of total 25(OH)D, total cholesterol was lower in children with percent 3-epi-25(OH)D 3 above the median (mean difference -7.1 mg/dL, p = 0.01). In conclusion, among schoolchildren, sex, race/ethnicity, and total serum 25(OH)D concentration is differentially associated with 3-epi-25(OH)D. The physiological relevance of 3-epi-25(OH)D 3 may be related to the 3-epi-25(OH)D 3 as a percentage of total 25(OH)D and should be considered in future investigations.

"3D fusion" echocardiography improves 3D left ventricular assessment: comparison with 2D contrast echocardiography.

Science.gov (United States)

Augustine, Daniel; Yaqub, Mohammad; Szmigielski, Cezary; Lima, Eduardo; Petersen, Steffen E; Becher, Harald; Noble, J Alison; Leeson, Paul

2015-02-01

Three-dimensional fusion echocardiography (3DFE) is a novel postprocessing approach that utilizes imaging data acquired from multiple 3D acquisitions. We assessed image quality, endocardial border definition, and cardiac wall motion in patients using 3DFE compared to standard 3D images (3D) and results obtained with contrast echocardiography (2DC). Twenty-four patients (mean age 66.9 ± 13 years, 17 males, 7 females) undergoing 2DC had three, noncontrast, 3D apical volumes acquired at rest. Images were fused using an automated image fusion approach. Quality of the 3DFE was compared to both 3D and 2DC based on contrast-to-noise ratio (CNR) and endocardial border definition. We then compared clinical wall-motion score index (WMSI) calculated from 3DFE and 3D to those obtained from 2DC images. Fused 3D volumes had significantly improved CNR (8.92 ± 1.35 vs. 6.59 ± 1.19, P echocardiography (1.06 ± 0.09 vs. 1.07 ± 0.15, P = 0.69), whereas unfused images produced significantly more variable results (1.19 ± 0.30). This was confirmed by a better intraclass correlation coefficient (ICC 0.72; 95% CI 0.32-0.88) relative to comparisons with unfused images (ICC 0.56; 95% CI 0.02-0.81). 3DFE significantly improves left ventricular image quality compared to unfused 3D in a patient population and allows noncontrast assessment of wall motion that approaches that achieved with 2D contrast echocardiography. © 2014, Wiley Periodicals, Inc.

iCAVE: an open source tool for visualizing biomolecular networks in 3D, stereoscopic 3D and immersive 3D.

Science.gov (United States)

Liluashvili, Vaja; Kalayci, Selim; Fluder, Eugene; Wilson, Manda; Gabow, Aaron; Gümüs, Zeynep H

2017-08-01

Visualizations of biomolecular networks assist in systems-level data exploration in many cellular processes. Data generated from high-throughput experiments increasingly inform these networks, yet current tools do not adequately scale with concomitant increase in their size and complexity. We present an open source software platform, interactome-CAVE (iCAVE), for visualizing large and complex biomolecular interaction networks in 3D. Users can explore networks (i) in 3D using a desktop, (ii) in stereoscopic 3D using 3D-vision glasses and a desktop, or (iii) in immersive 3D within a CAVE environment. iCAVE introduces 3D extensions of known 2D network layout, clustering, and edge-bundling algorithms, as well as new 3D network layout algorithms. Furthermore, users can simultaneously query several built-in databases within iCAVE for network generation or visualize their own networks (e.g., disease, drug, protein, metabolite). iCAVE has modular structure that allows rapid development by addition of algorithms, datasets, or features without affecting other parts of the code. Overall, iCAVE is the first freely available open source tool that enables 3D (optionally stereoscopic or immersive) visualizations of complex, dense, or multi-layered biomolecular networks. While primarily designed for researchers utilizing biomolecular networks, iCAVE can assist researchers in any field. © The Authors 2017. Published by Oxford University Press.

3D accelerator magnet calculations using MAGNUS-3D

International Nuclear Information System (INIS)

Pissanetzky, S.; Miao, Y.

1989-01-01

The steady trend towards increased magnetic and geometric complexity in the design of accelerator magnets has caused a need for reliable 3D computer models and a better understanding of the behavior of magnetic system in three dimensions. The capabilities of the MAGNUS-3D family of programs are ideally suited to solve this class of problems and provide insight into 3D effects. MAGNUS-3D can solve any problem of magnetostatics involving permanent magnets, nonlinear ferromagnetic materials and electric conductors. MAGNUS-3D uses the finite element method and the two-scalar-potentials formulation of Maxwell's equations to obtain the solution, which can then be used interactively to obtain tables of field components at specific points or lines, plots of field lines, function graphs representing a field component plotted against a coordinate along any line in space (such as the beam line), and views of the conductors, the mesh and the magnetic bodies. The magnetic quantities that can be calculated include the force or torque on conductors or magnetic parts, the energy, the flux through a specified surface, line integrals of any field component along any line in space, and the average field or potential harmonic coefficients. We describe the programs with emphasis placed on their use for accelerator magnet design, and present an advanced example of actual calculations. (orig.)

Recording stereoscopic 3D neurosurgery with a head-mounted 3D camera system.

Science.gov (United States)

Lee, Brian; Chen, Brian R; Chen, Beverly B; Lu, James Y; Giannotta, Steven L

2015-06-01

Stereoscopic three-dimensional (3D) imaging can present more information to the viewer and further enhance the learning experience over traditional two-dimensional (2D) video. Most 3D surgical videos are recorded from the operating microscope and only feature the crux, or the most important part of the surgery, leaving out other crucial parts of surgery including the opening, approach, and closing of the surgical site. In addition, many other surgeries including complex spine, trauma, and intensive care unit procedures are also rarely recorded. We describe and share our experience with a commercially available head-mounted stereoscopic 3D camera system to obtain stereoscopic 3D recordings of these seldom recorded aspects of neurosurgery. The strengths and limitations of using the GoPro(®) 3D system as a head-mounted stereoscopic 3D camera system in the operating room are reviewed in detail. Over the past several years, we have recorded in stereoscopic 3D over 50 cranial and spinal surgeries and created a library for education purposes. We have found the head-mounted stereoscopic 3D camera system to be a valuable asset to supplement 3D footage from a 3D microscope. We expect that these comprehensive 3D surgical videos will become an important facet of resident education and ultimately lead to improved patient care.

Diseño y Validación de un Cuestionario de Imagen Corporal Para Personas en Situación de Discapacidad Física

Directory of Open Access Journals (Sweden)

PAULA ANDREA BOTERO SOTO

2015-01-01

Full Text Available El presente estudio pretendió diseñar y validar el Cuestionario de Imagen Corporal para Personas con Discapacidad Física. La muestra incidental estuvo conformada por 114 personas de 18 a 50 años, residentes en Bogotá, que presentaban una discapacidad física. Se diseñaron 40 ítems, evaluados por jueces expertos, se aplicaron a la muestra y se definieron los criterios de calificación. El análisis factorial evidenció la existencia de tres factores constituyentes del constructo de imagen corporal: atractivo, funcionalidad y satisfacción. El cuestionario cumplió con las condiciones de confiabilidad y validez necesarias, por lo que se concluye que es posible utilizarlo, aunque es preciso continuar con el proceso de validación.

2D-Driven 3D Object Detection in RGB-D Images

KAUST Repository

Lahoud, Jean

2017-12-25

In this paper, we present a technique that places 3D bounding boxes around objects in an RGB-D scene. Our approach makes best use of the 2D information to quickly reduce the search space in 3D, benefiting from state-of-the-art 2D object detection techniques. We then use the 3D information to orient, place, and score bounding boxes around objects. We independently estimate the orientation for every object, using previous techniques that utilize normal information. Object locations and sizes in 3D are learned using a multilayer perceptron (MLP). In the final step, we refine our detections based on object class relations within a scene. When compared to state-of-the-art detection methods that operate almost entirely in the sparse 3D domain, extensive experiments on the well-known SUN RGB-D dataset [29] show that our proposed method is much faster (4.1s per image) in detecting 3D objects in RGB-D images and performs better (3 mAP higher) than the state-of-the-art method that is 4.7 times slower and comparably to the method that is two orders of magnitude slower. This work hints at the idea that 2D-driven object detection in 3D should be further explored, especially in cases where the 3D input is sparse.

E3D, 3-D Elastic Seismic Wave Propagation Code

International Nuclear Information System (INIS)

Larsen, S.; Harris, D.; Schultz, C.; Maddix, D.; Bakowsky, T.; Bent, L.

2004-01-01

1 - Description of program or function: E3D is capable of simulating seismic wave propagation in a 3D heterogeneous earth. Seismic waves are initiated by earthquake, explosive, and/or other sources. These waves propagate through a 3D geologic model, and are simulated as synthetic seismograms or other graphical output. 2 - Methods: The software simulates wave propagation by solving the elasto-dynamic formulation of the full wave equation on a staggered grid. The solution scheme is 4-order accurate in space, 2-order accurate in time

Modelo 3D del antopomorfo de Petón da Campaíña (Corme, Ponteceso, A Coruña)

OpenAIRE

Mañana-Borrazás, Patricia

2013-01-01

En este pdf 3D presentamos el detalle de uno de los motivos grabados localizados en el abrigo de Petón da Camapaíña, en Corme (Ponteceso, A Coruña). Este documento, un pdf 3D, permite interactuar con el modelo 3d: se puede mover el modelo 3D, rotarlo, girarlo, desplazarlo, hacer zoom, cambiar el aspecto e iluminación. Para ello es necesario tener instalado el programa gratuito ACROBAT READER 8 o superior. Recomendamos la instalación de la última versión disponible. Contiene además enlaces a c...

Pirâmide alimentar para crianças de 2 a 3 anos

Directory of Open Access Journals (Sweden)

Philippi Sonia Tucunduva

2003-01-01

Full Text Available Com a finalidade de promover orientação nutricional e hábitos alimentares saudáveis para crianças de 2 a 3 anos de idade, fez-se a adaptação da Pirâmide Alimentar. A pirâmide foi baseada em dieta padrão (1300kcal com seis refeições, calculada de acordo com as recomendações para a idade. As porções e os equivalentes foram estabelecidos de acordo com o total de energia de cada alimento utilizando-se o software Virtual Nutri. Foi avaliada a distribuição percentual dos macronutrientes em relação ao valor energético total, obtendo-se 15% para proteínas, 59% para carboidratos e 26% para lipídios. Foram calculados ainda os valores para ferro total e ferro biodisponível. Os alimentos estão organizados em oito grupos: arroz, pão, massa, batata, mandioca (5 porções, verduras e legumes (3 porções, frutas (3 porções, carnes e ovos (2 porções, leite, queijo e iogurte (3 porções, feijões (1 porção, óleos e gorduras (1 porção e açúcares e doces (1 porção. A pirâmide alimentar apresenta-se como um instrumento importante para orientação nutricional, servindo como guia para o planejamento de uma alimentação saudável para crianças de 2 a 3 anos de idade.

Binary recombination of para- and ortho-H3+ with electrons at low temperatures.

Science.gov (United States)

Dohnal, P; Hejduk, M; Varju, J; Rubovic, P; Roucka, S; Kotrík, T; Plasil, R; Johnsen, R; Glosík, J

2012-11-13

Results of an experimental study of binary recombination of para- and ortho-H(3)(+) ions with electrons are presented. Near-infrared cavity-ring-down absorption spectroscopy was used to probe the lowest rotational states of H(3)(+) ions in the temperature range of 77-200 K in an H(3)(+)-dominated afterglow plasma. By changing the para/ortho abundance ratio, we were able to obtain the binary recombination rate coefficients for pure and para-H(3)(+) and ortho-H(3)(+). The results are in good agreement with previous theoretical predictions.

Innovations in 3D printing: a 3D overview from optics to organs.

Science.gov (United States)

Schubert, Carl; van Langeveld, Mark C; Donoso, Larry A

2014-02-01

3D printing is a method of manufacturing in which materials, such as plastic or metal, are deposited onto one another in layers to produce a three dimensional object, such as a pair of eye glasses or other 3D objects. This process contrasts with traditional ink-based printers which produce a two dimensional object (ink on paper). To date, 3D printing has primarily been used in engineering to create engineering prototypes. However, recent advances in printing materials have now enabled 3D printers to make objects that are comparable with traditionally manufactured items. In contrast with conventional printers, 3D printing has the potential to enable mass customisation of goods on a large scale and has relevance in medicine including ophthalmology. 3D printing has already been proved viable in several medical applications including the manufacture of eyeglasses, custom prosthetic devices and dental implants. In this review, we discuss the potential for 3D printing to revolutionise manufacturing in the same way as the printing press revolutionised conventional printing. The applications and limitations of 3D printing are discussed; the production process is demonstrated by producing a set of eyeglass frames from 3D blueprints.

On Alternative Approaches to 3D Image Perception: Monoscopic 3D Techniques

Science.gov (United States)

Blundell, Barry G.

2015-06-01

In the eighteenth century, techniques that enabled a strong sense of 3D perception to be experienced without recourse to binocular disparities (arising from the spatial separation of the eyes) underpinned the first significant commercial sales of 3D viewing devices and associated content. However following the advent of stereoscopic techniques in the nineteenth century, 3D image depiction has become inextricably linked to binocular parallax and outside the vision science and arts communities relatively little attention has been directed towards earlier approaches. Here we introduce relevant concepts and terminology and consider a number of techniques and optical devices that enable 3D perception to be experienced on the basis of planar images rendered from a single vantage point. Subsequently we allude to possible mechanisms for non-binocular parallax based 3D perception. Particular attention is given to reviewing areas likely to be thought-provoking to those involved in 3D display development, spatial visualization, HCI, and other related areas of interdisciplinary research.

3D Modelling and Printing Technology to Produce Patient-Specific 3D Models.

Science.gov (United States)

Birbara, Nicolette S; Otton, James M; Pather, Nalini

2017-11-10

A comprehensive knowledge of mitral valve (MV) anatomy is crucial in the assessment of MV disease. While the use of three-dimensional (3D) modelling and printing in MV assessment has undergone early clinical evaluation, the precision and usefulness of this technology requires further investigation. This study aimed to assess and validate 3D modelling and printing technology to produce patient-specific 3D MV models. A prototype method for MV 3D modelling and printing was developed from computed tomography (CT) scans of a plastinated human heart. Mitral valve models were printed using four 3D printing methods and validated to assess precision. Cardiac CT and 3D echocardiography imaging data of four MV disease patients was used to produce patient-specific 3D printed models, and 40 cardiac health professionals (CHPs) were surveyed on the perceived value and potential uses of 3D models in a clinical setting. The prototype method demonstrated submillimetre precision for all four 3D printing methods used, and statistical analysis showed a significant difference (p3D printed models, particularly using multiple print materials, were considered useful by CHPs for preoperative planning, as well as other applications such as teaching and training. This study suggests that, with further advances in 3D modelling and printing technology, patient-specific 3D MV models could serve as a useful clinical tool. The findings also highlight the potential of this technology to be applied in a variety of medical areas within both clinical and educational settings. Copyright © 2017 Australian and New Zealand Society of Cardiac and Thoracic Surgeons (ANZSCTS) and the Cardiac Society of Australia and New Zealand (CSANZ). Published by Elsevier B.V. All rights reserved.

Conocimientos sobre la lectoescritura emergente y prácticas en las aulas para su promoción: Un estudio con docentes de Educación preescolar en Costa Rica

Directory of Open Access Journals (Sweden)

L. Diego Conejo

2017-12-01

Full Text Available Las concepciones y los conocimientos docentes afectan la práctica docente y esta, a su vez, influye en los logros de desarrollo en lectoescritura emergente de los niños preescolares. Esta investigación explora las valoraciones docentes de prácticas efectivas en el aula para la promoción de la lectoescritura emergente y sus conocimientos sobre conciencia fonológica y fonemas. Una muestra conformada por 284 docentes a cargo de salones de educación preescolar contestó un cuestionario en línea. Los resultados indicaron diferencias según tipo de universidad en la cual se tituló la docente. Las docentes graduadas de universidades públicas otorgaron mayor importancia a prácticas efectivas en el aula para la promoción de la lectoescritura emergente que las docentes graduadas de universidades privadas. Si bien la mayoría de participantes consideró la conciencia fonológica como un factor importante para el desarrollo de la lectoescritura, los conocimientos sobre esta fueron deficientes en toda la muestra. Igualmente, los conocimientos docentes sobre los fonemas y su habilidad para identificarlos en palabras concretas también fueron deficientes. Estos y otros hallazgos se discuten a la luz de sus implicaciones para la promoción de la calidad en la educación preescolar costarricense.

Validación de una metodología por cromatografía líquida de alta eficiencia para la determinación simultánea de vitaminas A, D3 y E en inyectables de uso veterinario Validação de metodologia por cromatografia líquida de alta eficiência para a determinação simultânea de vitaminas A, D3 e E em injetáveis de uso veterinário

Directory of Open Access Journals (Sweden)

Noralba Sierra

2007-12-01

Full Text Available Se presentan en este artículo los resultados del desarrollo y de la validación de una metodología analítica para la cuantificación simultánea de vitamina A palmitato, vitamina D3 y vitamina E acetato en inyectables de uso pecuario. El procedimiento consiste en una separación por cromatografía líquida de alta eficiencia (CLAE en fase inversa empleando como fase móvil una mezcla de acetonitrilo, metanol, agua (45:50:2.5, una columna C18 a 45 °C y detección a una longitud de onda de 280 nm. Se encontró que el método es selectivo, lineal y preciso. Estas características junto con su sencillez hacen que el método sea adecuado y conveniente para el objetivo propuesto. La robustez de la metodología fue también investigada. El método validado se aplicó para la determinación de las vitaminas en tres productos inyectables del mercado colombiano con registro sanitario del Instituto Colombiano Agropecuario (ICA.Neste artigo se apresentam os resultados do desenvolvimento e validação da metodologia analítica para a determinação simultânea de palmitato de vitamina A, vitamina D3 e vitamina E em injetáveis para uso de acetato na pecuária. O procedimento consiste na separação cromatográfica por cromatografia liquida de alta eficiência (CLAE em fase reversa, utilizando como fase móvel mistura de acetonitrila, metanol, água (45:50:2.5, coluna C18 a 45 °C e detecção em comprimento de onda de 280 nm. O método mostrou-se seletivo, linear e preciso. As características e a facilidade de execução do método indicam que ele é adequado e conveniente para o objetivo proposto. A robustez do método também foi pesquisada. O método validado foi aplicado para a determinação de vitaminas em três produtos injetáveis do mercado colombiano com registro no ICA (Instituto Colombiano Agropecuário.

Procedure for preparation of 3-fluor-D-alanine, 2-deutero-3-fluor-D-alanine and 2,3,3-trideutero-3-fluor-D-alanine and their salts

International Nuclear Information System (INIS)

Kollonitsch, J.; Kahan, F.M.

1971-01-01

Procedures for the preparation of 3-fluor-D-alanine, 2-deutero-3-fluor-D-alanine and 2,3,3-trideutero-3-fluor-D-alanine, and salts of these compounds, are described. These new compounds are useful antibacterial substances not only applicable in the disinfection of pharmaceutical, dental and medical equipment, but also in the treatment of diseases caused by bacteria, and may be administered orally. While 3-fluor-L-alanine metabolises rapidly with toxic results, 3-fluor-D-alanine is much more slowly broken down in vivo and is not harmful in normal doses. Further it has been found that deuteration gives new deutero-analogues which are less subject to metabolic breaking down and still retain the antibacterial strength of the original compound. The in vivo activity is thereby increased and maintained. (JIW)

Accurate and reproducible reconstruction of coronary arteries and endothelial shear stress calculation using 3D OCT: comparative study to 3D IVUS and 3D QCA.

Science.gov (United States)

Toutouzas, Konstantinos; Chatzizisis, Yiannis S; Riga, Maria; Giannopoulos, Andreas; Antoniadis, Antonios P; Tu, Shengxian; Fujino, Yusuke; Mitsouras, Dimitrios; Doulaverakis, Charalampos; Tsampoulatidis, Ioannis; Koutkias, Vassilis G; Bouki, Konstantina; Li, Yingguang; Chouvarda, Ioanna; Cheimariotis, Grigorios; Maglaveras, Nicos; Kompatsiaris, Ioannis; Nakamura, Sunao; Reiber, Johan H C; Rybicki, Frank; Karvounis, Haralambos; Stefanadis, Christodoulos; Tousoulis, Dimitris; Giannoglou, George D

2015-06-01

Geometrically-correct 3D OCT is a new imaging modality with the potential to investigate the association of local hemodynamic microenvironment with OCT-derived high-risk features. We aimed to describe the methodology of 3D OCT and investigate the accuracy, inter- and intra-observer agreement of 3D OCT in reconstructing coronary arteries and calculating ESS, using 3D IVUS and 3D QCA as references. 35 coronary artery segments derived from 30 patients were reconstructed in 3D space using 3D OCT. 3D OCT was validated against 3D IVUS and 3D QCA. The agreement in artery reconstruction among 3D OCT, 3D IVUS and 3D QCA was assessed in 3-mm-long subsegments using lumen morphometry and ESS parameters. The inter- and intra-observer agreement of 3D OCT, 3D IVUS and 3D QCA were assessed in a representative sample of 61 subsegments (n = 5 arteries). The data processing times for each reconstruction methodology were also calculated. There was a very high agreement between 3D OCT vs. 3D IVUS and 3D OCT vs. 3D QCA in terms of total reconstructed artery length and volume, as well as in terms of segmental morphometric and ESS metrics with mean differences close to zero and narrow limits of agreement (Bland-Altman analysis). 3D OCT exhibited excellent inter- and intra-observer agreement. The analysis time with 3D OCT was significantly lower compared to 3D IVUS. Geometrically-correct 3D OCT is a feasible, accurate and reproducible 3D reconstruction technique that can perform reliable ESS calculations in coronary arteries. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

The 3d8-(3d74p + 3p53d9) transitions in Br X: A striking case of configuration interaction

International Nuclear Information System (INIS)

Kleef, T.A.M. van; Uylings, P.H.M.; Ryabtsev, A.N.; Podobedova, L.I.; Joshi, Y.N.

1988-01-01

The spectrum of nine times ionized bromine (Br X) was photographed in the 90-120 A wavelength region on a variety of grazing incidence spectrographs using an open spark and a triggered spark as light sources. The analysis of the 3d 8 -(3d 7 4p + 3p 5 3d 9 ) transitions has resulted in establishing all 9 levels of the 3d 8 configuration, all 12 levels of the 3p 5 3d 9 configuration and 99 out of 110 levels of the 3d 7 4p configuration. The excitation probability of the 3p inner-shell electron increases with nuclear charge and in Br X is comparable with the excitation probability of the optical electrons resulting in a very strong configuration interaction between the 3p 5 3d 9 and 3d 7 4p configurations. Parametric calculations treating these configurations as one super configuration support the analysis. Two hundred and thirty two lines have been classified in this spectrum. (orig.)

ROOFN3D: DEEP LEARNING TRAINING DATA FOR 3D BUILDING RECONSTRUCTION

Directory of Open Access Journals (Sweden)

A. Wichmann

2018-05-01

Full Text Available Machine learning methods have gained in importance through the latest development of artificial intelligence and computer hardware. Particularly approaches based on deep learning have shown that they are able to provide state-of-the-art results for various tasks. However, the direct application of deep learning methods to improve the results of 3D building reconstruction is often not possible due, for example, to the lack of suitable training data. To address this issue, we present RoofN3D which provides a new 3D point cloud training dataset that can be used to train machine learning models for different tasks in the context of 3D building reconstruction. It can be used, among others, to train semantic segmentation networks or to learn the structure of buildings and the geometric model construction. Further details about RoofN3D and the developed data preparation framework, which enables the automatic derivation of training data, are described in this paper. Furthermore, we provide an overview of other available 3D point cloud training data and approaches from current literature in which solutions for the application of deep learning to unstructured and not gridded 3D point cloud data are presented.

Comparative evaluation of HD 2D/3D laparoscopic monitors and benchmarking to a theoretically ideal 3D pseudodisplay: even well-experienced laparoscopists perform better with 3D.

Science.gov (United States)

Wilhelm, D; Reiser, S; Kohn, N; Witte, M; Leiner, U; Mühlbach, L; Ruschin, D; Reiner, W; Feussner, H

2014-08-01

Though theoretically superior to standard 2D visualization, 3D video systems have not yet achieved a breakthrough in laparoscopy. The latest 3D monitors, including autostereoscopic displays and high-definition (HD) resolution, are designed to overcome the existing limitations. We performed a randomized study on 48 individuals with different experience levels in laparoscopy. Three different 3D displays (glasses-based 3D monitor, autostereoscopic display, and a mirror-based theoretically ideal 3D display) were compared to a 2D HD display by assessing multiple performance and mental workload parameters and rating the subjects during a laparoscopic suturing task. Electromagnetic tracking provided information on the instruments' pathlength, movement velocity, and economy. The usability, the perception of visual discomfort, and the quality of image transmission of each monitor were subjectively rated. Almost all performance parameters were superior with the conventional glasses-based 3D display compared to the 2D display and the autostereoscopic display, but were often significantly exceeded by the mirror-based 3D display. Subjects performed a task faster and with greater precision when visualization was achieved with the 3D and the mirror-based display. Instrument pathlength was shortened by improved depth perception. Workload parameters (NASA TLX) did not show significant differences. Test persons complained of impaired vision while using the autostereoscopic monitor. The 3D and 2D displays were rated user-friendly and applicable in daily work. Experienced and inexperienced laparoscopists profited equally from using a 3D display, with an improvement in task performance about 20%. Novel 3D displays improve laparoscopic interventions as a result of faster performance and higher precision without causing a higher mental workload. Therefore, they have the potential to significantly impact the further development of minimally invasive surgery. However, as shown by the

Minimally invasive vascular imaging using 3D-CTA and 3D-MRA. Update

International Nuclear Information System (INIS)

Hayashi, Hiromitsu; Kawamata, Hiroshi; Takagi, Ryo; Amano, Yasuo; Wakabayashi, Hiroyuki; Ichikawa, Kazuo; Kumazaki, Tatsuo

1998-01-01

Conventional angiography is considered the standard of reference for diagnostic imaging of vascular diseases with respect to its temporal and spatial resolution. This procedure, however is invasive and repeated studies are difficult, and arterial complications are occasionally associated in catheter-based conventional angiography. Recent advances in diagnostic imaging have facilitated three-dimensional CT angiography (3D-CTA) using the volumetric acquisition capabilities inherent in spiral CT and three-dimensional MR angiography (3D-MRA) using the 3D gradient-echo sequence with a bolus injection of Gd-DTPA. These techniques can provide vascular images exceedingly similar to conventional angiograms within a short acquisition time. 3D-CTA and 3D-MRA are considered to be promising, minimally invasive methods for obtaining images of the vasculature, and alternatives to catheter angiography. This study reviews the current status of 3D-CTA and 3D-MRA, with emphasis on the clinical usefulness of three-dimensional diagnostic imaging for the evaluation of diverse vascular pathologies. (author)

Extracció de crani en imatges de ressonància magnètica del cervell utilizant una xarxa neuronal convolucional 3D

OpenAIRE

Rodriguez Castello, David

2017-01-01

Implementation of a 3D convolutional neural network system that gets the information of each voxel from a magnetic resonance image in order to separate the skull from the brain tissue Implementación de un sistema basado en redes convolucionales 3D que extrae la información de los vóxeles de una resonancia magnética del cerebro para poder extraer el cráneo del tejido cerebral. Implementació d'un sistema basat en xarxes neuronals convolucionals 3D que extrau la informació dels vóxels d'un...

3dRPC: a web server for 3D RNA-protein structure prediction.

Science.gov (United States)

Huang, Yangyu; Li, Haotian; Xiao, Yi

2018-04-01

RNA-protein interactions occur in many biological processes. To understand the mechanism of these interactions one needs to know three-dimensional (3D) structures of RNA-protein complexes. 3dRPC is an algorithm for prediction of 3D RNA-protein complex structures and consists of a docking algorithm RPDOCK and a scoring function 3dRPC-Score. RPDOCK is used to sample possible complex conformations of an RNA and a protein by calculating the geometric and electrostatic complementarities and stacking interactions at the RNA-protein interface according to the features of atom packing of the interface. 3dRPC-Score is a knowledge-based potential that uses the conformations of nucleotide-amino-acid pairs as statistical variables and that is used to choose the near-native complex-conformations obtained from the docking method above. Recently, we built a web server for 3dRPC. The users can easily use 3dRPC without installing it locally. RNA and protein structures in PDB (Protein Data Bank) format are the only needed input files. It can also incorporate the information of interface residues or residue-pairs obtained from experiments or theoretical predictions to improve the prediction. The address of 3dRPC web server is http://biophy.hust.edu.cn/3dRPC. yxiao@hust.edu.cn.

Uma perspectiva metodológica para o estudo epigráfico: O caso de Sagunto ( I d.C.

Directory of Open Access Journals (Sweden)

Carlos Eduardo da Costa Campos

2015-10-01

Full Text Available A proposta é de apresentar uma metodologia para análise epigráfica que seja útil aos pesquisadores de História. Afinal, acreditamos que metodologia para epigrafia pode auxiliar a extrair diversas informações preciosas para uma pesquisa que poderiam ser omitidas em uma análise superficial. Assim iremos expor as etapas e categorias de análise com um estudo de caso sobre a cidade romana de Sagunto, no século I d.C..

Vitamin D3 increases in abdominal subcutaneous fat tissue after supplementation with vitamin D3

DEFF Research Database (Denmark)

Didriksen, Allan; Burild, Anders; Jakobsen, Jette

2015-01-01

stored in all adipose tissue in the body, the median body store was 6.6 mg vitamin D-3 and 0.12 mg 25(OH)D-3 in those given vitamin D-3. Conclusions: Subcutaneous adipose tissue may store large amounts of vitamin D-3. The clinical importance of this storage needs to be determined.......Objective: The objective was to assess the amount of vitamin D-3 stored in adipose tissue after long-term supplementation with high dose vitamin D-3. Design: A cross-sectional study on 29 subjects with impaired glucose tolerance who had participated in a randomized controlled trial with vitamin D-3...... 20 000 IU (500 mu g) per week vs placebo for 3-5 years. Methods: Abdominal subcutaneous fat tissue was obtained by needle biopsy for the measurements of vitamin D-3 and 25-hydroxyvitamin D-3 (25(OH)D-3). Body fat was measured with dual-energy X-ray absorptiometry, and serum 25(OH)D-3 level...

3D analysis of semiconductor devices: A combination of 3D imaging and 3D elemental analysis

Science.gov (United States)

Fu, Bianzhu; Gribelyuk, Michael A.

2018-04-01

3D analysis of semiconductor devices using a combination of scanning transmission electron microscopy (STEM) Z-contrast tomography and energy dispersive spectroscopy (EDS) elemental tomography is presented. 3D STEM Z-contrast tomography is useful in revealing the depth information of the sample. However, it suffers from contrast problems between materials with similar atomic numbers. Examples of EDS elemental tomography are presented using an automated EDS tomography system with batch data processing, which greatly reduces the data collection and processing time. 3D EDS elemental tomography reveals more in-depth information about the defect origin in semiconductor failure analysis. The influence of detector shadowing and X-rays absorption on the EDS tomography's result is also discussed.

Diseño y Validación de un Cuestionario de Imagen Corporal para Personas en Situación de Discapacidad Física/ Design and Validation of a Body Image Questionnaire for Physically Disabled Persons/ Desenho e Validação de um Questionário de Imagem Corporal para Pessoas com Necessidades Físicas Especiais

Directory of Open Access Journals (Sweden)

Paula Andrea Botero Soto

2015-05-01

Full Text Available El presente estudio pretendió diseñar y validar el Cuestionario de Imagen Corporal para Personas con Discapacidad Física. La muestra incidental estuvo conformada por 114 personas de 18 a 50 años, residentes en Bogotá, que presentaban una discapacidad física. Se diseñaron 40 ítems, evaluados por jueces expertos, se aplicaron a la muestra y se definieron los criterios de calificación. El análisis factorial evidenció la existencia de tres factores constituyentes del constructo de imagen corporal: atractivo, funcionalidad y satisfacción. El cuestionario cumplió con las condiciones de confiabilidad y validez necesarias, por lo que se concluye que es posible utilizarlo, aunque es preciso continuar con el proceso de validación.

EVALUACIÓN DE DIFERENTES DRENAJES EN TANQUES CIRCULARES PARA CULTIVO DE TRUCHA EN SISTEMAS DE RECIRCULACIÓN

Directory of Open Access Journals (Sweden)

ROBERTO GARCÍA-CRIOLLO

Full Text Available La evaluación de diferentes alternativas de captura y remoción eficiente de sólidos en tanques de cultivo en sistemas de recirculación para acuacultura cobra importancia como primer mecanismo para garantizar un adecuado tratamiento de las aguas residuales y su posterior vertimiento o reuso. El objetivo de esta investigación fue evaluar durante un mes el desempeño de remoción aparente de sólidos sedimentables en 12 tanques de cultivo circulares de 250 L en un sistema de recirculación de agua para cuatro diferentes mecanismos de drenaje: D1-tubería perforada de fondo con salida lateral y rebalse externo, D2-rebalse lateral, D3-rebalse interno, D4-doble drenaje, y para tres tiempos de retención hidráulica Q1, Q2 y Q3 equivalentes a un recambio cada 25, 50 y 82 minutos. El experimento se desarrolló con alevinos de trucha arco iris con biomasa inicial de 1,6 kg/m³ alimentados a una tasa del 3% del peso vivo diario, se monitorearon los parámetros oxígeno disuelto, temperatura y pH. Hubo diferencias significativas tanto para los drenajes como para los tiempos de retención, los mejores resultados se obtuvieron para el D3-Q1, cuya combinación reportó una eficiencia media del 88,02% de remoción de sólidos, seguido del D1-Q1; el tratamiento con menor eficiencia fue el constituido por el D2-Q3.

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

Directory of Open Access Journals (Sweden)

Irene Paima

2012-12-01

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

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

Directory of Open Access Journals (Sweden)

Irene Paima

2012-12-01

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

Vitamin D-3 and 25-hydroxyvitamin D-3 in raw and cooked pork cuts

DEFF Research Database (Denmark)

Clausen, Ina; Jakobsen, Jette; Leth, Torben

2003-01-01

The contents of vitamin D-3 and its metabolically active metabolite 25-hydroxyvitamin D-3 (25OHD(3)) were examined by HPLC in different parts of four common raw pork cuts (loin boneless, leg inside, thin belly, neck) and in cooked meat (loin boneless). In whole raw pork cuts, varying in fat content......, and that rind, despite its limited fat content, has a high concentration of vitamin D-3 and 25OHD(3). Cooking increased vitamin D-3 and 25OHD(3) calculated per 100 g of tissue in all parts and in the whole cut (in whole cuts in raw and cooked meat, respectively: vitamin D-3: 0.15 (0.08-0.24) mug/100 g and 0...... 25OHD(3) contributes significantly to vitamin D activity. Food databases should include concentrations of both vitamin D and 25OHD(3). (C) 2003 Elsevier Ltd. All rights reserved....

Structure of the Human Dopamine D3 Receptor in Complex with a D2/D3 Selective Antagonist

Energy Technology Data Exchange (ETDEWEB)

Chien, Ellen Y.T.; Liu, Wei; Zhao, Qiang; Katritch, Vsevolod; Han, Gye Won; Hanson, Michael A.; Shi, Lei; Newman, Amy Hauck; Javitch, Jonathan A.; Cherezov, Vadim; Stevens, Raymond C. (Cornell); (Scripps); (NIDA); (Columbia); (UCSD); (Receptos)

2010-11-30

Dopamine modulates movement, cognition, and emotion through activation of dopamine G protein-coupled receptors in the brain. The crystal structure of the human dopamine D3 receptor (D3R) in complex with the small molecule D2R/D3R-specific antagonist eticlopride reveals important features of the ligand binding pocket and extracellular loops. On the intracellular side of the receptor, a locked conformation of the ionic lock and two distinctly different conformations of intracellular loop 2 are observed. Docking of R-22, a D3R-selective antagonist, reveals an extracellular extension of the eticlopride binding site that comprises a second binding pocket for the aryl amide of R-22, which differs between the highly homologous D2R and D3R. This difference provides direction to the design of D3R-selective agents for treating drug abuse and other neuropsychiatric indications.

Un almuerzo para llevar saludable (Packing Smart)

Centers for Disease Control (CDC) Podcasts

2011-08-22

En este podcast para niños, los chicos de Kidtastics hablan sobre almuerzos creativos para llevarse a la escuela, que ayuden a mantenerse con energía el resto del día.  Created: 8/22/2011 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 1/3/2012.

Open 3D Projects

Directory of Open Access Journals (Sweden)

Felician ALECU

2010-01-01

Full Text Available Many professionals and 3D artists consider Blender as being the best open source solution for 3D computer graphics. The main features are related to modeling, rendering, shading, imaging, compositing, animation, physics and particles and realtime 3D/game creation.

Modification of 3D milling machine to 3D printer

OpenAIRE

Taska, Abraham

2014-01-01

Tato práce se zabývá přestavbou gravírovací frézky na 3D tiskárnu. V první části se práce zabývá možnými technologiemi 3D tisku a možností jejich využití u přestavby. Dále jsou popsány a vybrány vhodné součásti pro přestavbu. V další části je realizováno řízení ohřevu podložky, trysky a řízení posuvu drátu pomocí softwaru TwinCat od společnosti Beckhoff na průmyslovém počítači. Výsledkem práce by měla být oživená 3D tiskárna. This thesis deals with rebuilding of engraving machine to 3D pri...

Anti-3D Weapon Model Detection for Safe 3D Printing Based on Convolutional Neural Networks and D2 Shape Distribution

Directory of Open Access Journals (Sweden)

Giao N. Pham

2018-03-01

Full Text Available With the development of 3D printing, weapons are easily printed without any restriction from the production managers. Therefore, anti-3D weapon model detection is necessary issue in safe 3D printing to prevent the printing of 3D weapon models. In this paper, we would like to propose an anti-3D weapon model detection algorithm to prevent the printing of anti-3D weapon models for safe 3D printing based on the D2 shape distribution and an improved convolutional neural networks (CNNs. The purpose of the proposed algorithm is to detect anti-3D weapon models when they are used in 3D printing. The D2 shape distribution is computed from random points on the surface of a 3D weapon model and their geometric features in order to construct a D2 vector. The D2 vector is then trained by improved CNNs. The CNNs are used to detect anti-3D weapon models for safe 3D printing by training D2 vectors which have been constructed from the D2 shape distribution of 3D weapon models. Experiments with 3D weapon models proved that the D2 shape distribution of 3D weapon models in the same class is the same. Training and testing results also verified that the accuracy of the proposed algorithm is higher than the conventional works. The proposed algorithm is applied in a small application, and it could detect anti-3D weapon models for safe 3D printing.

CASTLE3D - A Computer Aided System for Labelling Archaeological Excavations in 3D

Science.gov (United States)

Houshiar, H.; Borrmann, D.; Elseberg, J.; Nüchter, A.; Näth, F.; Winkler, S.

2015-08-01

Documentation of archaeological excavation sites with conventional methods and tools such as hand drawings, measuring tape and archaeological notes is time consuming. This process is prone to human errors and the quality of the documentation depends on the qualification of the archaeologist on site. Use of modern technology and methods in 3D surveying and 3D robotics facilitate and improve this process. Computer-aided systems and databases improve the documentation quality and increase the speed of data acquisition. 3D laser scanning is the state of the art in modelling archaeological excavation sites, historical sites and even entire cities or landscapes. Modern laser scanners are capable of data acquisition of up to 1 million points per second. This provides a very detailed 3D point cloud of the environment. 3D point clouds and 3D models of an excavation site provide a better representation of the environment for the archaeologist and for documentation. The point cloud can be used both for further studies on the excavation and for the presentation of results. This paper introduces a Computer aided system for labelling archaeological excavations in 3D (CASTLE3D). Consisting of a set of tools for recording and georeferencing the 3D data from an excavation site, CASTLE3D is a novel documentation approach in industrial archaeology. It provides a 2D and 3D visualisation of the data and an easy-to-use interface that enables the archaeologist to select regions of interest and to interact with the data in both representations. The 2D visualisation and a 3D orthogonal view of the data provide cuts of the environment that resemble the traditional hand drawings. The 3D perspective view gives a realistic view of the environment. CASTLE3D is designed as an easy-to-use on-site semantic mapping tool for archaeologists. Each project contains a predefined set of semantic information that can be used to label findings in the data. Multiple regions of interest can be joined under

Do-It-Yourself: 3D Models of Hydrogenic Orbitals through 3D Printing

Science.gov (United States)

Griffith, Kaitlyn M.; de Cataldo, Riccardo; Fogarty, Keir H.

2016-01-01

Introductory chemistry students often have difficulty visualizing the 3-dimensional shapes of the hydrogenic electron orbitals without the aid of physical 3D models. Unfortunately, commercially available models can be quite expensive. 3D printing offers a solution for producing models of hydrogenic orbitals. 3D printing technology is widely…

3D motion graphics for 2D artists conquering the 3rd dimension

CERN Document Server

Byrne, Bill

2011-01-01

Add 3D to your mograph skillset! For the experienced 2D artist, this lavishly illustrated, 4 color book presents the essentials to building and compositing 3D elements into your 2D world of film and broadcast. Concepts and techniques are presented in concise, step-by-step tutorials, hundreds of which are featured throughout. Featured applications include Photoshop, Illustrator, After Effects, and Cinema 4D. Lessons include exploring the expanded 3D functionality of the Adobe Creative Suite applications (After Effects, Photoshop, and Illustrator) through a series of practical tutorials. More

3D Systems” ‘Stuck in the Middle’ of the 3D Printer Boom?

NARCIS (Netherlands)

A. Hoffmann (Alan)

2014-01-01

textabstract3D Systems, the pioneer of 3D printing, predicted a future where "kids from 8 to 80" could design and print their ideas at home. By 2013, 9 years after the creation of the first working 3D printer, there were more than 30 major 3D printing companies competing for market share. 3DS and

FUN3D Manual: 13.3

Science.gov (United States)

Biedron, Robert T.; Carlson, Jan-Renee; Derlaga, Joseph M.; Gnoffo, Peter A.; Hammond, Dana P.; Jones, William T.; Kleb, Bil; Lee-Rausch, Elizabeth M.; Nielsen, Eric J.; Park, Michael A.;

3D deblending of simultaneous source data based on 3D multi-scale shaping operator

Science.gov (United States)

Zu, Shaohuan; Zhou, Hui; Mao, Weijian; Gong, Fei; Huang, Weilin

2018-04-01

We propose an iterative three-dimensional (3D) deblending scheme using 3D multi-scale shaping operator to separate 3D simultaneous source data. The proposed scheme is based on the property that signal is coherent, whereas interference is incoherent in some domains, e.g., common receiver domain and common midpoint domain. In two-dimensional (2D) blended record, the coherency difference of signal and interference is in only one spatial direction. Compared with 2D deblending, the 3D deblending can take more sparse constraints into consideration to obtain better performance, e.g., in 3D common receiver gather, the coherency difference is in two spatial directions. Furthermore, with different levels of coherency, signal and interference distribute in different scale curvelet domains. In both 2D and 3D blended records, most coherent signal locates in coarse scale curvelet domain, while most incoherent interference distributes in fine scale curvelet domain. The scale difference is larger in 3D deblending, thus, we apply the multi-scale shaping scheme to further improve the 3D deblending performance. We evaluate the performance of 3D and 2D deblending with the multi-scale and global shaping operators, respectively. One synthetic and one field data examples demonstrate the advantage of the 3D deblending with 3D multi-scale shaping operator.

Underwater 3D filming

Directory of Open Access Journals (Sweden)

Roberto Rinaldi

2014-12-01

Full Text Available After an experimental phase of many years, 3D filming is now effective and successful. Improvements are still possible, but the film industry achieved memorable success on 3D movie’s box offices due to the overall quality of its products. Special environments such as space (“Gravity” and the underwater realm look perfect to be reproduced in 3D. “Filming in space” was possible in “Gravity” using special effects and computer graphic. The underwater realm is still difficult to be handled. Underwater filming in 3D was not that easy and effective as filming in 2D, since not long ago. After almost 3 years of research, a French, Austrian and Italian team realized a perfect tool to film underwater, in 3D, without any constrains. This allows filmmakers to bring the audience deep inside an environment where they most probably will never have the chance to be.

3D histomorphometric quantification from 3D computed tomography

International Nuclear Information System (INIS)

Oliveira, L.F. de; Lopes, R.T.

2004-01-01

The histomorphometric analysis is based on stereologic concepts and was originally applied to biologic samples. This technique has been used to evaluate different complex structures such as ceramic filters, net structures and cancellous objects that are objects with inner connected structures. The measured histomorphometric parameters of structure are: sample volume to total reconstructed volume (BV/TV), sample surface to sample volume (BS/BV), connection thickness (Tb Th ), connection number (Tb N ) and connection separation (Tb Sp ). The anisotropy was evaluated as well. These parameters constitute the base of histomorphometric analysis. The quantification is realized over cross-sections recovered by cone beam reconstruction, where a real-time microfocus radiographic system is used as tomographic system. The three-dimensional (3D) histomorphometry, obtained from tomography, corresponds to an evolution of conventional method that is based on 2D analysis. It is more coherent with morphologic and topologic context of the sample. This work shows result from 3D histomorphometric quantification to characterize objects examined by 3D computer tomography. The results, which characterizes the internal structures of ceramic foams with different porous density, are compared to results from conventional methods

Scoops3D: software to analyze 3D slope stability throughout a digital landscape

Science.gov (United States)

Reid, Mark E.; Christian, Sarah B.; Brien, Dianne L.; Henderson, Scott T.

2015-01-01

The computer program, Scoops3D, evaluates slope stability throughout a digital landscape represented by a digital elevation model (DEM). The program uses a three-dimensional (3D) method of columns approach to assess the stability of many (typically millions) potential landslides within a user-defined size range. For each potential landslide (or failure), Scoops3D assesses the stability of a rotational, spherical slip surface encompassing many DEM cells using a 3D version of either Bishop’s simplified method or the Ordinary (Fellenius) method of limit-equilibrium analysis. Scoops3D has several options for the user to systematically and efficiently search throughout an entire DEM, thereby incorporating the effects of complex surface topography. In a thorough search, each DEM cell is included in multiple potential failures, and Scoops3D records the lowest stability (factor of safety) for each DEM cell, as well as the size (volume or area) associated with each of these potential landslides. It also determines the least-stable potential failure for the entire DEM. The user has a variety of options for building a 3D domain, including layers or full 3D distributions of strength and pore-water pressures, simplistic earthquake loading, and unsaturated suction conditions. Results from Scoops3D can be readily incorporated into a geographic information system (GIS) or other visualization software. This manual includes information on the theoretical basis for the slope-stability analysis, requirements for constructing and searching a 3D domain, a detailed operational guide (including step-by-step instructions for using the graphical user interface [GUI] software, Scoops3D-i) and input/output file specifications, practical considerations for conducting an analysis, results of verification tests, and multiple examples illustrating the capabilities of Scoops3D. Easy-to-use software installation packages are available for the Windows or Macintosh operating systems; these packages

MAP3D: a media processor approach for high-end 3D graphics

Science.gov (United States)

Darsa, Lucia; Stadnicki, Steven; Basoglu, Chris

1999-12-01

Equator Technologies, Inc. has used a software-first approach to produce several programmable and advanced VLIW processor architectures that have the flexibility to run both traditional systems tasks and an array of media-rich applications. For example, Equator's MAP1000A is the world's fastest single-chip programmable signal and image processor targeted for digital consumer and office automation markets. The Equator MAP3D is a proposal for the architecture of the next generation of the Equator MAP family. The MAP3D is designed to achieve high-end 3D performance and a variety of customizable special effects by combining special graphics features with high performance floating-point and media processor architecture. As a programmable media processor, it offers the advantages of a completely configurable 3D pipeline--allowing developers to experiment with different algorithms and to tailor their pipeline to achieve the highest performance for a particular application. With the support of Equator's advanced C compiler and toolkit, MAP3D programs can be written in a high-level language. This allows the compiler to successfully find and exploit any parallelism in a programmer's code, thus decreasing the time to market of a given applications. The ability to run an operating system makes it possible to run concurrent applications in the MAP3D chip, such as video decoding while executing the 3D pipelines, so that integration of applications is easily achieved--using real-time decoded imagery for texturing 3D objects, for instance. This novel architecture enables an affordable, integrated solution for high performance 3D graphics.

The 3d84s and 3d84d configurations of the fourth spectrum of zinc: Zn IV

International Nuclear Information System (INIS)

Joshi, Y.N.; Van Kleef, T.A.M.

1987-01-01

The spectrum of zinc was photographed in the region 2000 A - 820 A on a 6.65 m and a 10.7 m normal incidence spectrograph using a sliding spark and a triggered spark source. The new measurements have helped us to confirm the earlier analysis of the 3d 8 4s-3d 8 4p transitions and locate the missing level 3d 8 4s 2 S 1/2 , and study the 3d 8 4p-3d 8 4d transitions. 59 out of 67 levels of the 3d 8 4d configuration have been established. Parametric least-squares-fitted calculations support the analysis. Two hundred and eight (208) additional lines have been classified in the Zn IV analysis. (orig.)

Diseño y desarrollo de una instalación experimental mediante el uso de herramientas de impresión 3D para el estudio y simulación de flujos granulares

OpenAIRE

Martínez Pedrero, Borja

2017-01-01

El presento proyecto surge de la motivación para realizar una práctica teórico experimental, llevada a cabo por alumnos de la Escuela Técnica Superior de Ingenieros Industriales de Madrid (ETSIIM), en la que se estudie el comportamiento de sólidos granulares en una instalación experimental de almacenamiento y descarga elaborada mediante herramientas de impresión 3D. A este tipo de sólidos se les denomina granulares porque están compuestos por numerosas partículas, cuyas propiedades unitar...

Prospective use of the 3D printing technology for the microstructural engineering of Solid Oxide Fuel Cell components

Directory of Open Access Journals (Sweden)

Hernández-Rodríguez, E. M.

2014-10-01

Full Text Available A cost-effective micro-manufacturing process to accurately build 3D microstructures for their prospective use in the fabrication of Solid Oxide Fuel Cells components has been tested. The 3D printing method, based on the stereolithography, allows solidifying layer by layer a dispersion of ceramic material in a liquid photosensitive organic monomer. A simple projector, a computer-controlled z-stage and a few PowerPoint slides may be used for the fabrication of a wide range of complex 3D microstructures in few minutes. In this work, 3D ceramic microstructures based on the yttria-stabilized zirconia (YSZ were successfully fabricated. The microstructured ceramic components produced were stable after sintering at 1400 ºC for 4 h. Impedance measurements show that the fabrication process does not have any detrimental effect on the electrical properties of the structured material.Se ha probado un método económico de microfabricación que permite construir con precisión microestructuras 3D para su potencial uso en la producción de componentes de pilas de combustible de óxidos sólidos. El método de impresión 3D basado en la estereolitografía, permite solidificar, capa por capa, una dispersión de material cerámico en un líquido que contiene un monómero orgánico fotosensible. Un simple proyector, una plataforma vertical automatizada y unas pocas imágenes de PowerPoint pueden ser utilizados para la fabricación de un amplio rango de estructuras complejas 3D en unos pocos minutos. En este trabajo se han fabricado con éxito microestructuras 3D basadas en la zirconia dopada con itria (YSZ. El material cerámico microestructurado producido se mantuvo estable después de sinterizarse a 1400 ºC durante 4 h. Las medidas de impedancia demostraron que el proceso de fabricación no tenía ningún efecto perjudicial en las propiedades eléctricas del material estructurado.

Acquiring 3D scene information from 2D images

NARCIS (Netherlands)

Li, Ping

2011-01-01

In recent years, people are becoming increasingly acquainted with 3D technologies such as 3DTV, 3D movies and 3D virtual navigation of city environments in their daily life. Commercial 3D movies are now commonly available for consumers. Virtual navigation of our living environment as used on a

2D-Driven 3D Object Detection in RGB-D Images

KAUST Repository

Lahoud, Jean; Ghanem, Bernard

2017-01-01

In this paper, we present a technique that places 3D bounding boxes around objects in an RGB-D scene. Our approach makes best use of the 2D information to quickly reduce the search space in 3D, benefiting from state-of-the-art 2D object detection

Diseño e impresión 3D. Aplicaciones a la docencia

OpenAIRE

Alarte Garví, Amparo

2014-01-01

En el presente año 2014 el mundo de la impresión 3D, pese a ser relativamente nuevo, está generando muchas expectativas de uso. El estudio propuesto en este trabajo pretende analizar las posibilidades de uso, en el mundo de la docencia, tanto de las nuevas herramientas de diseño como de las impresoras en tres dimensiones. Para ello, y partiendo del conocimiento del diseño por ordenador en dos dimensiones, se pretende establecer un protocolo de enseñanza del manejo de las 3 dimensiones por ord...

Diseño y simulación de un regulador difuso para un convertidor C.D.-C.D. Elevador

Directory of Open Access Journals (Sweden)

Leonardo Llanes Correa

2011-03-01

Full Text Available Este artículo expone el diseño de un regulador difuso para un convertidor C.D.-C.D. Elevador y los resultados de lassimulaciones realizadas con el uso de Matlab y Simulink. Dichos resultados muestran como el regulador difuso es capazde mantener estable la tensión de salida del convertidor ante variaciones de carga de alrededor de un 50%.  This article shows the design of fuzzy regulator for a DC-DC Boost converter and the results of simulations usingMatlab and Simulink. That results displays how fuzzy regulator keep stable the converter output voltage for loadvariation of 50%.

3D FaceCam: a fast and accurate 3D facial imaging device for biometrics applications

Science.gov (United States)

Geng, Jason; Zhuang, Ping; May, Patrick; Yi, Steven; Tunnell, David

2004-08-01

Human faces are fundamentally three-dimensional (3D) objects, and each face has its unique 3D geometric profile. The 3D geometric features of a human face can be used, together with its 2D texture, for rapid and accurate face recognition purposes. Due to the lack of low-cost and robust 3D sensors and effective 3D facial recognition (FR) algorithms, almost all existing FR systems use 2D face images. Genex has developed 3D solutions that overcome the inherent problems in 2D while also addressing limitations in other 3D alternatives. One important aspect of our solution is a unique 3D camera (the 3D FaceCam) that combines multiple imaging sensors within a single compact device to provide instantaneous, ear-to-ear coverage of a human face. This 3D camera uses three high-resolution CCD sensors and a color encoded pattern projection system. The RGB color information from each pixel is used to compute the range data and generate an accurate 3D surface map. The imaging system uses no moving parts and combines multiple 3D views to provide detailed and complete 3D coverage of the entire face. Images are captured within a fraction of a second and full-frame 3D data is produced within a few seconds. This described method provides much better data coverage and accuracy in feature areas with sharp features or details (such as the nose and eyes). Using this 3D data, we have been able to demonstrate that a 3D approach can significantly improve the performance of facial recognition. We have conducted tests in which we have varied the lighting conditions and angle of image acquisition in the "field." These tests have shown that the matching results are significantly improved when enrolling a 3D image rather than a single 2D image. With its 3D solutions, Genex is working toward unlocking the promise of powerful 3D FR and transferring FR from a lab technology into a real-world biometric solution.

3D-modeling and 3D-printing explorations on Japanese tea ceremony utensils

NARCIS (Netherlands)

Levy, P.D.; Yamada, Shigeru

2017-01-01

In this paper, we inquire aesthetical aspects of the Japanese tea ceremony, described as the aesthetics in the imperfection, based on novel fabrication technologies: 3D-modeling and 3D-printing. To do so, 3D-printed utensils (chashaku and chasen) were iteratively designed for the ceremony and were

3D printing for dummies

CERN Document Server

Hausman, Kalani Kirk

2014-01-01

Get started printing out 3D objects quickly and inexpensively! 3D printing is no longer just a figment of your imagination. This remarkable technology is coming to the masses with the growing availability of 3D printers. 3D printers create 3-dimensional layered models and they allow users to create prototypes that use multiple materials and colors.  This friendly-but-straightforward guide examines each type of 3D printing technology available today and gives artists, entrepreneurs, engineers, and hobbyists insight into the amazing things 3D printing has to offer. You'll discover methods for

Kuvaus 3D-tulostamisesta hammastekniikassa

OpenAIRE

Munne, Mauri; Mustonen, Tuomas; Vähäjylkkä, Jaakko

2013-01-01

3D-tulostaminen kehittyy nopeasti ja yleistyy koko ajan. Tulostimien tarkkuuksien kehittyessä 3D-tulostus on ottamassa myös jalansijaa hammastekniikan alalta. Tämän opinnäytetyön tarkoituksena on kuvata 3D-tulostamisen tilaa hammastekniikassa. 3D-tulostaminen on Suomessa vielä melko harvinaista, joten opinnäytetyön tavoitteena on koota yhteen kaikki mahdollinen tieto liittyen 3D-tulostamiseen hammastekniikassa. Tavoitteena on myös 3D-tulostimen testaaminen käytännössä aina suun skannaami...

Estética do documentário S3D, o enigma da imagem estereoscópica

Directory of Open Access Journals (Sweden)

Hélio Augusto Godoy de Souza

2015-12-01

Full Text Available Durante mais de dez anos de pesquisa teórica e prática, foi possível analisar os avanços tecnológicos, metodológicos e artísticos da realização de filmes documentários estereoscópicos (documentários S3D2. Documentários, em meu ponto de vista, são índices da Realidade e o S3D aponta para uma Realidade Metafísica. Este artigo tem por objetivo discutir a imagem estereoscópica em um patamar filosófico, como forma de compreensão do mundo sob um viés Realista, para isso considera dignos de análise autores como C.S.Peirce, Jacob von Uexküll, J.J.Gibson e Wolfgang Smith. O resultado é a retomada de aspectos da Metafísica como significado imagético.

The dimension added by 3D scanning and 3D printing of meteorites

Science.gov (United States)

de Vet, S. J.

2016-01-01

An overview for the 3D photodocumentation of meteorites is presented, focussing on two 3D scanning methods in relation to 3D printing. The 3D photodocumention of meteorites provides new ways for the digital preservation of culturally, historically or scientifically unique meteorites. It has the potential for becoming a new documentation standard of meteorites that can exist complementary to traditional photographic documentation. Notable applications include (i.) use of physical properties in dark flight-, strewn field-, or aerodynamic modelling; (ii.) collection research of meteorites curated by different museum collections, and (iii.) public dissemination of meteorite models as a resource for educational users. The possible applications provided by the additional dimension of 3D illustrate the benefits for the meteoritics community.

3D Model Optimization of Four-Facet Drill for 3D Drilling Simulation

Directory of Open Access Journals (Sweden)

Buranský Ivan

2016-09-01

Full Text Available The article is focused on optimization of four-facet drill for 3D drilling numerical modelling. For optimization, the process of reverse engineering by PowerShape software was used. The design of four-facet drill was created in NumrotoPlus software. The modified 3D model of the drill was used in the numerical analysis of cutting forces. Verification of the accuracy of 3D models for reverse engineering was implemented using the colour deviation maps. The CAD model was in the STEP format. For simulation software, 3D model in the STEP format is ideal. STEP is a solid model. Simulation software automatically splits the 3D model into finite elements. The STEP model was therefore more suitable than the STL model.

Signal alteration of the cochlear perilymph on 3 different sequences after intratympanic Gd-DTPA administration at 3 tesla. Comparison of 3D-FLAIR, 3D-T1-weighted imaging, and 3D-CISS

International Nuclear Information System (INIS)

Yamazaki, Masahiro; Naganawa, Shinji; Kawai, Hisashi; Nihashi, Takashi; Nakashima, Tsutomu

2010-01-01

Three-dimensional fluid-attenuated inversion recovery (3D-FLAIR) imaging after intratympanic gadolinium injection is useful for pathophysiologic and morphologic analysis of the inner ear. However, statistical analysis of differences in inner ear signal intensity among 3D-FLAIR and other sequences has not been reported. We evaluated the signal intensity of cochlear fluid on each of 3D-FLAIR, 3D-T 1 -weighted imaging (T 1 WI), and 3D-constructive interference in the steady state (CISS) to clarify the differences in contrast effect among these 3 sequences using intratympanic gadolinium injection. Twenty-one patients underwent 3D-FLAIR, 3D-T 1 WI, and 3D-CISS imaging at 3 tesla 24 hours after intratympanic injection of gadolinium. We determined regions of interest of the cochleae (C) and medulla oblongata (M) on each image, evaluated the signal intensity ratio between C and M (CM ratio), and determined the ratio of cochlear signal intensity of the injected side to that of the non-injected side (contrast value). The CM ratio of the injected side (3.00±1.31, range, 0.53 to 4.88, on 3D-FLAIR; 0.83±0.30, range, 0.36 to 1.58 on 3D-T 1 WI) was significantly higher than that of the non-injected side (0.52±0.14, range, 0.30 to 0.76 on 3D-FLAIR; 0.49±0.11, range, 0.30 to 0.71 on 3D-T 1 WI) on 3D-FLAIR and 3D-T 1 WI (P 1 WI (1.73±0.60 range, 0.98 to 3.09) (P<0.001). The 3D-FLAIR sequence is the most sensitive for observing alteration in inner ear fluid signal after intratympanic gadolinium injection. Our results warrant use of 3D-FLAIR as a sensitive imaging technique to clarify the pathological and morphological mechanisms of disorders of the inner ear. (author)

25-Hydroxyvitamin D-3 affects vitamin D status similar to vitamin D-3 in pigs - but the meat produced has a lower content of vitamin D

DEFF Research Database (Denmark)

Jakobsen, Jette; Maribo, H.; Bysted, Anette

2007-01-01

In food databases, the specific contents of vitamin D-3 and 25-hydroxyvitamin D-3 in food have been implemented in the last 10 years. No consensus has yet been established on the relative activity between the components. Therefore, the objective of the present study was to assess the relative...... activity of 25-hydroxyvitamin D-3 compared to vitamin D-3. The design was a parallel study in pigs (n 24), which from an age of 12 weeks until slaughter 11 weeks later were fed approximately 55 mu g vitamin D/d, as vitamin D-3, in a mixture of vitamin D-3 and 25-hydroxyvitamin D-3, or 25-hydroxyvitamin D-3....... The end-points measured were plasma 25-hydroxyvitamin D-3, and in the liver and loin the content of vitamin D-3 and 25-hydroxyvitamin D-3 Vitamin D-3 and 25-hydroxyvitamin D3 in the feed did not affect 25-hydroxyvitamin D-3 in the plasma, liver or loin differently, while a significant effect was shown...

Sistema de memoria organizacional para centros I+D de una institución de educación superior

Directory of Open Access Journals (Sweden)

Ruth Reátegui, Ana Poma

2015-05-01

Full Text Available El objetivo del artículo es proponer un modelo de Sistemas de Memoria Organizacional (SMO para un centro de Investigación y Desarrollo (I+D basado en cuatro componentes: social, cultural, tecnológico y de procesos para una IES de Ecuador. Las instituciones de educación superior (IES son organizaciones donde la investigación es una de sus actividades fundamentales que requiere una adecuada gestión del conocimiento. Para esta propuesta se utilizó un método de investigación inductiva basado en entrevistas a los docentes involucrados para conocer las actividades y procesos que conlleva el desarrollo de este tipo de proyectos. Los SMO permiten preservar el conocimiento para ser utilizarlo en las actividades actuales y futuras. Uno de los problemas encontrados es que no se está conservando ni mucho menos compartiendo el conocimiento que las personas poseen como resultado de experiencias, prácticas, actitudes, entre otros aspectos, relacionados con los proyectos. Además el modelo resultante se implementó en un sistema basado en software libre y tecnologías web. La implementación de este modelo muestra como resultado un alto nivel de aceptación por parte de directivos e investigadores de los centros de I+D.

Modelado e impresión en 3D en la enseñanza de las matemáticas: un estudio exploratorio

Directory of Open Access Journals (Sweden)

Beltrán Pellicer, Pablo

2017-01-01

Full Text Available Las impresoras en 3D constituyen un recurso que poco a poco está encontrando su hueco en los centros educativos, de la mano de docentes innovadores y creativos. Normalmente, son profesores de Tecnología o Informática en educación secundaria, o los de ciertas especialidades de ciclos formativos, los que buscan utilizar el diseño de piezas y su posterior impresión como medio para alcanzar sus objetivos de aprendizaje. Nos planteamos aquí como objetivo el justificar la utilización de este recurso para la enseñanza de las matemáticas. Método: Se adopta una metodología de carácter descriptivo y exploratorio. Se realiza, en primer lugar, un breve análisis de la tecnología de impresión y de modelado de objetos en 3D. Posteriormente, a partir de una serie de experiencias de aula, analizamos algunas tareas que se pueden plantear para comprobar que se ponen en juego conocimientos matemáticos, aplicando la noción de configuración de objetos y significados matemáticos. Resultados: Las configuraciones de objetos matemáticos para cada una de las situaciones revelan contenidos propios del nivel educativo del alumnado al que se dirigen. Conclusiones: Es pertinente, desde el punto de vista epistémico, considerar propuestas de enseñanza-aprendizaje que hagan uso del modelado y la impresión en 3D. Abstract: 3D printers are finding their place in educational institutions, as innovative and creative teachers use them to propose activities in their lessons. Usually, they are teachers of technology and computer science in secondary education, or of certain specialties in professional training. In these cases, the tasks involve designing and printing solid pieces as a means of achieving the learning objectives. The purpose of this paper is to justify using this resource in the teaching of mathematics at different educational levels. Method: We adopt a descriptive and exploratory qualitative methodology, first depicting 3D printing technology and

Proposta de diretrizes para processo criativo para o design virtual de embalagens

Directory of Open Access Journals (Sweden)

Suzana Funk

2010-12-01

Full Text Available Este artigo apresenta a sistematização do design virtual de embalagens, utilizando softwares de modelagem 3D como ferramentas de apoio à criação. Com os recursos tecnológicos disponíveis, a criação das embalagens normalmente é feita com o auxílio de softwares, mas com pouca ou sem sistematização do processo criativo. Em virtude disso, apresenta-se um estudo sobre os aspectos teóricos que abordam o processo criativo virtual de embalagens e uma pesquisa com profissionais que possuem experiência em modelagem 3D. É feita uma análise qualitativa e interligação destes dados e, em seguida, são propostas dez diretrizes, organizadas dentro de uma metodologia. O seu diferencial, em relação às demais, está nas fases Criar e Apresentar, que envolvem a criação e apresentação de embalagens utilizando as possibilidades de softwares de modelagem 3D. Para exemplificar a metodologia, faz-se o design de um frasco de perfume. O mesmo é apresentado com foco na geração de alternativas utilizando software. Pode-se observar que as diretrizes contribuem para conduzir as atividades, até a apresentação final do trabalho. A sistematização da criação, utilizando softwares 3D, pode potencializar o design de embalagens, diminuindo o tempo de criação e os custos com a criação de protótipos, além de aperfeiçoar a visualização final do produto.

The 3d4-3d34p transitions of triply ionized manganese (Mn IV)

International Nuclear Information System (INIS)

Tchang-Brillet, W.Ue.L.; Artru, M.C.; Wyart, J.F.

1986-01-01

The analysis of Mn IV is extended in the wavelength range 473-847 A. A total of 600 classified lines are given, of which 372 are newly observed. All of them are due to 3d 4 -3d 3 4p transitions. Their classification and the identification of 59 new levels are supported by the parametric studies of the 3d 4 and 3d 3 4p configurations. The ground configuration 3d 4 is calculated by taking into account the effective magnetic interactions which improve by an order of magnitude the theoretical fine structure of the quintet and triplet terms. The analysis was guided by the prediction of relative line strengths in intermediate coupling. Calculated energies and LS composition are given for all levels of the configuration, 3d 4 and 3d 3 4p. (orig).

3D-MR vs. 3D-CT of the shoulder in patients with glenohumeral instability

Energy Technology Data Exchange (ETDEWEB)

Stillwater, Laurence; Koenig, James; Maycher, Bruce; Davidson, Michael [University of Manitoba, Winnipeg (Canada)

2017-03-15

To determine whether 3D-MR osseous reformats of the shoulder are equivalent to 3D-CT osseous reformats in patients with glenohumeral instability. Patients with glenohumeral instability, who were to be imaged with both CT and MRI, were prospectively selected. CT and MR were performed within 24 h of one another on 12 shoulders. Each MR study included an axial 3D isotropic VIBE sequence. The image data from the isotropic VIBE sequence were post-processed using subtraction and 3D software. CT data were post-processed using 3D software. The following measurements were obtained for both 3D-CT and 3D-MR post-processed images: height and width of the humeral head and glenoid, Hill-Sachs size and percent humeral head loss (if present), size of glenoid bone loss and percent glenoid bone loss (if present). Paired t-tests and two one-sided tests for equivalence were used to assess the differences between imaging modalities and equivalence. The measurement differences from the 3D-CT and 3D-MR post-processed images were not statistically significant. The measurement differences for humeral height, glenoid height and glenoid width were borderline statistically significant; however, using any adjustment for multiple comparisons, this failed to be significant. Using an equivalence margin of 1 mm for measurements and 1.5% for percent bone loss, the 3D-MR and 3D-CT post-processed images were equivalent. Three-dimensional-MR osseous models of the shoulder using a 3D isotropic VIBE sequence were equivalent to 3D-CT osseous models, and the differences between modalities were not statistically significant. (orig.)

3D geometric phase analysis and its application in 3D microscopic morphology measurement

Science.gov (United States)

Zhu, Ronghua; Shi, Wenxiong; Cao, Quankun; Liu, Zhanwei; Guo, Baoqiao; Xie, Huimin

2018-04-01

Although three-dimensional (3D) morphology measurement has been widely applied on the macro-scale, there is still a lack of 3D measurement technology on the microscopic scale. In this paper, a microscopic 3D measurement technique based on the 3D-geometric phase analysis (GPA) method is proposed. In this method, with machine vision and phase matching, the traditional GPA method is extended to three dimensions. Using this method, 3D deformation measurement on the micro-scale can be realized using a light microscope. Simulation experiments were conducted in this study, and the results demonstrate that the proposed method has a good anti-noise ability. In addition, the 3D morphology of the necking zone in a tensile specimen was measured, and the results demonstrate that this method is feasible.

HEURÍSTICA PARA EL EQUILIBRADO DE LÍNEAS DE ENSAMBLES DEL TIPO TSS HEURISTIC FOR THE TSS ASSEMBLY LINE BALANCING PROBLEM

Directory of Open Access Journals (Sweden)

Pedro Palominos Belmar

2010-12-01

Full Text Available El propósito de este trabajo es presentar una heurística para el problema de equilibrado de líneas para células conformadas en "U". Particularmente para el sistema de fabricación denominado Toyota Sewing System (TSS, que representa un nuevo concepto de organización en una línea de producción. Si bien este tipo de sistema ha sido abordado en la literatura bajo el título de sistemas de producción autoequilibrado, en donde el equilibrio se logra mediante la utilización de dos reglas básicas, creemos que estas reglas no son suficientes para lograr el autoequilibrio. Por lo cual incorporamos el concepto de zonas de enlace que facilita el equilibrado de la línea. De los resultados obtenidos mediante simulación, concluimos que la heurística es eficiente para este tipo de sistemas de producción.The purpose of this paper is to present a heuristic for the assembly line balancing problem in U-shaped cells, particularly for the manufacturing system called Toyota Sewing System (TSS, which represents a new production line organization concept. Although this type of system has been approached in the literature under the name of self-balanced production system, where the balance is achieved using two basic rules, we believe that these rules are not sufficient to achieve self-balance, so we have incorporated the concept of linkage zones that facilitate balancing the line. From the results obtained by simulation we conclude that the heuristic is efficient for this kind of production system.

2D/3D/4D ULTRASOUND IN INFERTILITY MANAGEMENT

Directory of Open Access Journals (Sweden)

Uršula Reš-Muravec

2018-02-01

Ultrasound in infertility diagnostics: Ultrasound is used for examination of uterus, tubes, ovaries and peritoneal cause of infertility. It can be used in different menstrual phases: proliferative, periovulatory and secretory phase. Examination of uterus: A 2D scan can measure the size of the uterus (length, width and depth and a 2D flow (colour and power doppler. With 3D technology we can measure the whole volume with VOCAL (virtual organ computer-aided analysis and 3D circulation with the index (VI – vascular index, FI – flow index and VFI – vascular flow index in the uterus. A 2D scan can help us define uterine malformations, fibroids and adenomyosis to a certain extent. However, a 3D scan offers more accurate diagnosis of these malformations. Endometrium is examined separately. With 2D the width is measured and morphology and focal lesions (polyp, fibroids, adhesions are examined. With 3D the real sagital plane for the width measurement can be defined . We can measure the volume of endometrium and subendometrium and 3D circulation in endometrium and subendometrium. The FIS (f luid instlation sonography is very useful when examining the endometrium; saline or gel can be used for uterine instalation. We can measure and define the position of the structures in the endometrium more accurately when they are surrouned by saline or gel. We can view these structures with a surface view, similar to the one used for hysteroscopy. With this information we can explain the pathology to the patient and easily plan the surgical procedures. Examination of the tubes: With 2D US we can see the tubes in the pelvis only if there are dilatations, but sometimes it is difficult to distinguish them from the neighbouring forma- tions. With a 3D ultrasound we can define the shape and continuity of the tube and we can view the tube from different angles (inversion mode. Different contrast media are used for determining tubal patency. Tubal patency can be diagnosed with 2D Hy

3D Deep Learning Angiography (3D-DLA) from C-arm Conebeam CT.

Science.gov (United States)

Montoya, J C; Li, Y; Strother, C; Chen, G-H

2018-05-01

Deep learning is a branch of artificial intelligence that has demonstrated unprecedented performance in many medical imaging applications. Our purpose was to develop a deep learning angiography method to generate 3D cerebral angiograms from a single contrast-enhanced C-arm conebeam CT acquisition in order to reduce image artifacts and radiation dose. A set of 105 3D rotational angiography examinations were randomly selected from an internal data base. All were acquired using a clinical system in conjunction with a standard injection protocol. More than 150 million labeled voxels from 35 subjects were used for training. A deep convolutional neural network was trained to classify each image voxel into 3 tissue types (vasculature, bone, and soft tissue). The trained deep learning angiography model was then applied for tissue classification into a validation cohort of 8 subjects and a final testing cohort of the remaining 62 subjects. The final vasculature tissue class was used to generate the 3D deep learning angiography images. To quantify the generalization error of the trained model, we calculated the accuracy, sensitivity, precision, and Dice similarity coefficients for vasculature classification in relevant anatomy. The 3D deep learning angiography and clinical 3D rotational angiography images were subjected to a qualitative assessment for the presence of intersweep motion artifacts. Vasculature classification accuracy and 95% CI in the testing dataset were 98.7% (98.3%-99.1%). No residual signal from osseous structures was observed for any 3D deep learning angiography testing cases except for small regions in the otic capsule and nasal cavity compared with 37% (23/62) of the 3D rotational angiographies. Deep learning angiography accurately recreated the vascular anatomy of the 3D rotational angiography reconstructions without a mask. Deep learning angiography reduced misregistration artifacts induced by intersweep motion, and it reduced radiation exposure

3D Results in VTK with data for gravitational collapse of a molecular hydrogen cloud; Resultados 3D en VTK con datos para colapso gravitacional de una nube de hidrogeno molecular

Energy Technology Data Exchange (ETDEWEB)

Duarte P, R.; Klapp E, J. [ININ, Carretera Mexico-Toluca, s/n, La Marquesa, Ocoyoacac, Mexico, C.P. 52750 (Mexico)

2007-07-01

With the objective of using free software for visualization, we experience with VTK (Visualization Toolkit) system guided to objects, using a VTK classes library, Tcl languages and PV-WAVE, to create an application and to produce some images in 3D with data of 3D coordinated points, in this case of a gravitational collapse of a cloud of molecular hydrogen. (Author)

3D-grafiikka ja pelimoottorit

OpenAIRE

Sillanpää, Otto

2014-01-01

Tässä opinnäytetyössä tutkitaan miten 3D-mallit saadaan sellaiseen muotoon, että ne olisivat käytettävissä eri pelimoottoreissa. Tutkimuksen tarkoituksena on selvittää, miten luodaan 3D-malleja pelimoottoreihin, sekä miten 3D-mallinnusohjelmat ja pelimoottorit eroavat toisistaan, kun käsitellään 3D-malleja. Tässä työssä pelimoottoreina toimivat Valven Source sekä Epic Gamesin Unreal Engine 3. 3D-mallinnusohjelmista käytössä olivat Autodeskin 3ds Max 2014 ja Blender Foundationin Blender 2.7...

Reactive flow simulation in complex 3D geometries using the COM3D code

International Nuclear Information System (INIS)

Breitung, W.; Kotchourko, A.; Veser, A.; Scholtyssek, W.

1999-01-01

The COM3D code, under development at the Forschungszentrum Karlsruhe (FZK), is a 3-d CFD code to describe turbulent combustion phenomena in complex geometries. It is intended to be part of the advanced integral code system for containment analysis (INCA) which includes in addition GASFLOW for distribution calculations, V3D for slow combustion and DET3D for detonation analysis. COM3D uses a TVD-solver and optional models for turbulence, chemistry and thermodynamics. The hydrodynamic model considers mass, momentum and energy conservation. Advanced procedures were provided to facilitate grid-development for complex 3-d structures. COM3D was validated on experiments performed on different scales with generally good agreement for important physical quantities. The code was applied to combustion analysis of a large PWR. The initial conditions were obtained from a GASFLOW distribution analysis for a LOOP scenario. Results are presented concerning flame propagation and pressure evolution in the containment which clearly demonstrate the effects of internal structures, their influence on turbulence formation and consequences for local loads. (author)

Escaneado 3D e interpretación virtual del Teatro romano de Córdoba

Directory of Open Access Journals (Sweden)

José Luis Gómez Merino

2012-11-01

Full Text Available Del teatro romano de Córdoba se conserva una parte de la cimentación del graderío cuyos restos se conservan en el semisótano de la ampliación del Museo Arqueológico. Para el trabajo infográfico tomamos como punto de partida la nube de puntos obtenida tras una escanometría 3D de los restos. A partir de ahí tratamos de explicar al público visitante con qué se identifican esos restos concretos. El resultado son tres audiovisuales y varios paneles situados a lo largo de la pasarela que el público recorre para visitar los restos. Intentamos así desarrollar lenguajes gráficos en el entorno del dibujo científico en el que se desenvuelven habitualmente los arqueólogos. El reto es hacer que ese entorno sea atractivo para el público.

3D Hilbert Space Filling Curves in 3D City Modeling for Faster Spatial Queries

DEFF Research Database (Denmark)

Ujang, Uznir; Antón Castro, Francesc/François; Azri, Suhaibah

2014-01-01

The advantages of three dimensional (3D) city models can be seen in various applications including photogrammetry, urban and regional planning, computer games, etc. They expand the visualization and analysis capabilities of Geographic Information Systems on cities, and they can be developed using...... method, retrieving portions of and especially searching these 3D city models, will not be done optimally. Even though current developments are based on an open data model allotted by the Open Geospatial Consortium (OGC) called CityGML, its XML-based structure makes it challenging to cluster the 3D urban...... objects. In this research, the authors propose an opponent data constellation technique of space-filling curves (3D Hilbert curves) for 3D city model data representation. Unlike previous methods, that try to project 3D or n-dimensional data down to 2D or 3D using Principal Component Analysis (PCA...

Synthesis of cefepime-d3 and cefepime-d8

International Nuclear Information System (INIS)

Kamachi, Hajime; Okita, Takaaki; Tsuno, Takashi; Naito, Takayuki

1990-01-01

Synthesis of cefepime-d 3 (6a) and cefepime-d 8 (6b) is described. Diphenylmethyl 7-benzylideneamino-3-chloromethyl-3-cephem-4-carboxylate (2) was treated with sodium iodide to afford the iodide 3, which was without isolation, allowed to react with N-methyl-d 3 -pyrrolidine to give the quaternary salt 4a. Deblocking of 4a with HCO 2 H and HCl gave 7-amino-3-(N-methyl-d3-pyrrolidinio)methyl-3-cephem-4-carboxylate hydrochloride (5a). Acylation of 5a with benzotriazol-1-yl (Z)-2-(2-aminothiazol-4-yl)-2-methoxyiminoacetate followed by treatment with dil. H 2 SO 4 afforded 6a sulfate. In the same way, 6b was synthesized using N-methyl-pyrrolidine-d 8 . (author)

Using one hybrid 3D-1D-3D approach for the conceptual design of WCCB blanket for CFETR

Energy Technology Data Exchange (ETDEWEB)

Jiang, Kecheng; Zhang, Xiaokang [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031 (China); University of Science and Technology of China, Hefei, Anhui, 230027 (China); Li, Jia [University of Science and Technology of China, Hefei, Anhui, 230027 (China); Ma, Xuebin [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031 (China); University of Science and Technology of China, Hefei, Anhui, 230027 (China); Liu, Songlin, E-mail: slliu@ipp.ac.cn [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031 (China); University of Science and Technology of China, Hefei, Anhui, 230027 (China)

2017-01-15

Highlights: • The Hybrid 3D-1D-3D approach is used for radial building design of WCCB. • Nuclear heat obtained by this method agrees well with 3D neutronics results. • The final results of temperature and TBR satisfy with the requirements. • All the results show that this approach is high efficiency and high reliability. - Abstract: A hybrid 3D-1D-3D approach is proposed for the conceptual design of a blanket. Firstly, the neutron wall loading (NWL) of each blanket module is obtained through a neutronics calculation employing a 3D model, which contains the geometry outline of in-vacuum vessel components and the exact neutron source distribution. Secondly, a 1D cylindrical model with the blanket module containing a detailed radial building is adopted for the neutronics analysis, with the aim of calculating the tritium breeding ratio (TBR) and nuclear heating. Being normalized to the NWL, the nuclear heating is transferred to a 2D model for thermal-hydraulics analysis using the FLUENT code. Through a series analysis of nuclear-thermal iterations that considers the tritium breeding ratio (TBR) and thermal performance as optimization objectives, the optimized radial building of each module surrounding plasma can be obtained. Thirdly, the 3D structural design of each module is established by adding side walls, cover plates, stiffening plates, and other components based on the radial building. The 3D neutronics and thermal-hydraulics using the detailed blanket modules are re-analyzed. This approach has been successfully applied to the design of a water-cooled ceramic breeder blanket for the Chinese Fusion Engineering Test Reactor (CFETR). The radial building of each blanket module surrounding plasma is optimized. The global tritium breeding ratio (TBR) calculated by the 3D neutronics analysis is 1.21, and the temperature of all materials in the 3D blanket structure is below the upper limits. As indicated by the comparison of the 1D and 3D neutronics and thermal

Modelling 3D spatial objects in a geo-DBMS using a 3D primitive

Science.gov (United States)

Arens, Călin; Stoter, Jantien; van Oosterom, Peter

2005-03-01

There is a growing interest in modelling the world in three dimensions, both in applications and in science. At the same time, geographical information systems are changing into integrated architecture in which administrative and spatial data are maintained in one environment. It is for this reason that mainstream Data Base Management Systems (DBMSs) have implemented spatial data types according to the 'Simple Feature Specifications for SQL', described by the OpenGeospatial Consortium. However, these specifications are 2D, as indeed are the implementations in DBMSs. At the Section GIS Technology of TU Delft, research has been carried out in which a 3D primitive was implemented in a DBMS (Oracle Spatial). To explore the possibilities and complications, a fairly simple 3D primitive was chosen to start with: a polyhedron. In the future the study will be extended with more complex primitives, the ultimate aim being to build 3D models with features closer to the real world. Besides the data structure, a validation function was developed to check the geometric accuracy of the data. Rules for validation were established and translated into prototype implementations with the aid of literature. In order to manipulate the data, a list of useful 3D functions was specified. Most of these were translated into algorithms, which were implemented in the DBMS. The algorithms for these functions were obtained from the relevant literature. The research also comprised a comparative performance test on spatial indexing in 2D and 3D, using an R-tree. Finally, existing software was used to visualize 3D objects structured with the implemented 3D primitive. This research is a first attempt to implement a true 3D primitive in a DBMS. Future research will focus on extending and improving the implementations and on optimizing maintenance and query of 3D objects in DBMSs.

Comparison of modern 3D and 2D MR imaging sequences of the wrist at 3 Tesla

International Nuclear Information System (INIS)

Rehnitz, C.; Klaan, B.; Amarteifio, E.; Kauczor, H.U.; Weber, M.A.; Stillfried, F. von; Burkholder, I.

2016-01-01

To compare the image quality of modern 3 D and 2 D sequences for dedicated wrist imaging at 3 Tesla (T) MRI. At 3 T MRI, 18 patients (mean age: 36.2 years) with wrist pain and 16 healthy volunteers (mean age: 26.4 years) were examined using 2 D proton density-weighted fat-saturated (PDfs), isotropic 3 D TrueFISP, 3 D MEDIC, and 3 D PDfs SPACE sequences. Image quality was rated on a five-point scale (0 - 4) including overall image quality (OIQ), visibility of important structures (cartilage, ligaments, TFCC) and degree of artifacts. Signal-to-noise ratios (SNR) and contrast-to-noise ratios (CNR) of cartilage/bone/muscle/fluid as well as the mean overall SNR/CNR were calculated using region-of-interest analysis. ANOVA, paired t-, and Wilcoxon-signed-rank tests were applied. The image quality of all tested sequences was superior to 3 D PDfs SPACE (p < 0.01). 3 D TrueFISP had the highest combined cartilage score (mean: 3.4) and performed better in cartilage comparisons against 3 D PDfs SPACE in both groups and 2 D PDfs in volunteers (p < 0.05). 3 D MEDIC performed better in 7 of 8 comparisons (p < 0.05) regarding ligaments and TFCC. 2 D PDfs provided constantly high scores. The mean overall SNR/CNR for 2 D PDfs, 3 D PDfs SPACE, 3 D TrueFISP, and 3 D MEDIC were 68/65, 32/27, 45/47, and 57/45, respectively. 2 D PDfs performed best in most SNR/CNR comparisons (p < 0.05) and 3 D MEDIC performed best within the 3 D sequences (p < 0.05). Except 3 D PDfs SPACE, all tested 3 D and 2 D sequences provided high image quality. 3 D TrueFISP was best for cartilage imaging, 3 D MEDIC for ligaments and TFCC and 2 D PDfs for general wrist imaging.

Cd3(MoO4)(TeO3)2: A Polar 3D Compound Containing d10-d0 SCALP-Effect Cations.

Science.gov (United States)

Feng, Yuquan; Fan, Huitao; Zhong, Zhiguo; Wang, Hongwei; Qiu, Dongfang

2016-11-21

The new polar 3D cadmium molybdotellurite Cd 3 (MoO 4 )(TeO 3 ) 2 was obtained by means of a high-temperature solid-state method. Cd 3 (MoO 4 )(TeO 3 ) 2 is a monoclinic crystal system, and it exhibits the polar space group P2 1 (No. 4). The structure of Cd 3 (MoO 4 )(TeO 3 ) 2 can be viewed as a complicated 3D architecture that is composed of distorted CdO n (n = 6, 7) polyhedra, TeO 3 trigonal pyramids, and MoO 4 polyhedra. The compound features the first 3D NCS cadmium molybdotellurite with 1D 4- and 6-MR channels and a polar structure originating from the TeO 3 groups, MoO 4 groups, and displacements of d 10 Cd 2+ cations. The results were further confirmed by calculations of the net polarization. The UV-vis spectrum and thermal properties indicate that Cd 3 (MoO 4 )(TeO 3 ) 2 exhibits a broad transparent region and excellent thermal stability. SHG tests of Cd 3 (MoO 4 )(TeO 3 ) 2 revealed that its response is approximately the same as that of KH 2 PO 4 at the same grain size between 105 and 150 μm and that it is phase-matchable.

3D Bayesian contextual classifiers

DEFF Research Database (Denmark)

Larsen, Rasmus

2000-01-01

We extend a series of multivariate Bayesian 2-D contextual classifiers to 3-D by specifying a simultaneous Gaussian distribution for the feature vectors as well as a prior distribution of the class variables of a pixel and its 6 nearest 3-D neighbours.......We extend a series of multivariate Bayesian 2-D contextual classifiers to 3-D by specifying a simultaneous Gaussian distribution for the feature vectors as well as a prior distribution of the class variables of a pixel and its 6 nearest 3-D neighbours....

3-D discrete analytical ridgelet transform.

Science.gov (United States)

Helbert, David; Carré, Philippe; Andres, Eric

2006-12-01

In this paper, we propose an implementation of the 3-D Ridgelet transform: the 3-D discrete analytical Ridgelet transform (3-D DART). This transform uses the Fourier strategy for the computation of the associated 3-D discrete Radon transform. The innovative step is the definition of a discrete 3-D transform with the discrete analytical geometry theory by the construction of 3-D discrete analytical lines in the Fourier domain. We propose two types of 3-D discrete lines: 3-D discrete radial lines going through the origin defined from their orthogonal projections and 3-D planes covered with 2-D discrete line segments. These discrete analytical lines have a parameter called arithmetical thickness, allowing us to define a 3-D DART adapted to a specific application. Indeed, the 3-D DART representation is not orthogonal, It is associated with a flexible redundancy factor. The 3-D DART has a very simple forward/inverse algorithm that provides an exact reconstruction without any iterative method. In order to illustrate the potentiality of this new discrete transform, we apply the 3-D DART and its extension to the Local-DART (with smooth windowing) to the denoising of 3-D image and color video. These experimental results show that the simple thresholding of the 3-D DART coefficients is efficient.

2D-3D rigid registration to compensate for prostate motion during 3D TRUS-guided biopsy.

Science.gov (United States)

De Silva, Tharindu; Fenster, Aaron; Cool, Derek W; Gardi, Lori; Romagnoli, Cesare; Samarabandu, Jagath; Ward, Aaron D

2013-02-01

Three-dimensional (3D) transrectal ultrasound (TRUS)-guided systems have been developed to improve targeting accuracy during prostate biopsy. However, prostate motion during the procedure is a potential source of error that can cause target misalignments. The authors present an image-based registration technique to compensate for prostate motion by registering the live two-dimensional (2D) TRUS images acquired during the biopsy procedure to a preacquired 3D TRUS image. The registration must be performed both accurately and quickly in order to be useful during the clinical procedure. The authors implemented an intensity-based 2D-3D rigid registration algorithm optimizing the normalized cross-correlation (NCC) metric using Powell's method. The 2D TRUS images acquired during the procedure prior to biopsy gun firing were registered to the baseline 3D TRUS image acquired at the beginning of the procedure. The accuracy was measured by calculating the target registration error (TRE) using manually identified fiducials within the prostate; these fiducials were used for validation only and were not provided as inputs to the registration algorithm. They also evaluated the accuracy when the registrations were performed continuously throughout the biopsy by acquiring and registering live 2D TRUS images every second. This measured the improvement in accuracy resulting from performing the registration, continuously compensating for motion during the procedure. To further validate the method using a more challenging data set, registrations were performed using 3D TRUS images acquired by intentionally exerting different levels of ultrasound probe pressures in order to measure the performance of our algorithm when the prostate tissue was intentionally deformed. In this data set, biopsy scenarios were simulated by extracting 2D frames from the 3D TRUS images and registering them to the baseline 3D image. A graphics processing unit (GPU)-based implementation was used to improve the

The NIH 3D Print Exchange: A Public Resource for Bioscientific and Biomedical 3D Prints.

Science.gov (United States)

Coakley, Meghan F; Hurt, Darrell E; Weber, Nick; Mtingwa, Makazi; Fincher, Erin C; Alekseyev, Vsevelod; Chen, David T; Yun, Alvin; Gizaw, Metasebia; Swan, Jeremy; Yoo, Terry S; Huyen, Yentram

2014-09-01

The National Institutes of Health (NIH) has launched the NIH 3D Print Exchange, an online portal for discovering and creating bioscientifically relevant 3D models suitable for 3D printing, to provide both researchers and educators with a trusted source to discover accurate and informative models. There are a number of online resources for 3D prints, but there is a paucity of scientific models, and the expertise required to generate and validate such models remains a barrier. The NIH 3D Print Exchange fills this gap by providing novel, web-based tools that empower users with the ability to create ready-to-print 3D files from molecular structure data, microscopy image stacks, and computed tomography scan data. The NIH 3D Print Exchange facilitates open data sharing in a community-driven environment, and also includes various interactive features, as well as information and tutorials on 3D modeling software. As the first government-sponsored website dedicated to 3D printing, the NIH 3D Print Exchange is an important step forward to bringing 3D printing to the mainstream for scientific research and education.

Effect of viewing distance on 3D fatigue caused by viewing mobile 3D content

Science.gov (United States)

Mun, Sungchul; Lee, Dong-Su; Park, Min-Chul; Yano, Sumio

2013-05-01

With an advent of autostereoscopic display technique and increased needs for smart phones, there has been a significant growth in mobile TV markets. The rapid growth in technical, economical, and social aspects has encouraged 3D TV manufacturers to apply 3D rendering technology to mobile devices so that people have more opportunities to come into contact with many 3D content anytime and anywhere. Even if the mobile 3D technology leads to the current market growth, there is an important thing to consider for consistent development and growth in the display market. To put it briefly, human factors linked to mobile 3D viewing should be taken into consideration before developing mobile 3D technology. Many studies have investigated whether mobile 3D viewing causes undesirable biomedical effects such as motion sickness and visual fatigue, but few have examined main factors adversely affecting human health. Viewing distance is considered one of the main factors to establish optimized viewing environments from a viewer's point of view. Thus, in an effort to determine human-friendly viewing environments, this study aims to investigate the effect of viewing distance on human visual system when exposing to mobile 3D environments. Recording and analyzing brainwaves before and after watching mobile 3D content, we explore how viewing distance affects viewing experience from physiological and psychological perspectives. Results obtained in this study are expected to provide viewing guidelines for viewers, help ensure viewers against undesirable 3D effects, and lead to make gradual progress towards a human-friendly mobile 3D viewing.

From 2D Lithography to 3D Patterning

NARCIS (Netherlands)

Van Zeijl, H.W.; Wei, J.; Shen, C.; Verhaar, T.M.; Sarro, P.M.

2010-01-01

Lithography as developed for IC device fabrication is a high volume high accuracy patterning technology with strong 2 dimensional (2D) characteristics. This 2D nature makes it a challenge to integrate this technology in a 3 dimensional (3D) manufacturing environment. This article addresses the

RELAP5-3D User Problems

Energy Technology Data Exchange (ETDEWEB)

Riemke, Richard Allan

2002-09-01

The Reactor Excursion and Leak Analysis Program with 3D capability1 (RELAP5-3D) is a reactor system analysis code that has been developed at the Idaho National Engineering and Environmental Laboratory (INEEL) for the U. S. Department of Energy (DOE). The 3D capability in RELAP5-3D includes 3D hydrodynamics2 and 3D neutron kinetics3,4. Assessment, verification, and validation of the 3D capability in RELAP5-3D is discussed in the literature5,6,7,8,9,10. Additional assessment, verification, and validation of the 3D capability of RELAP5-3D will be presented in other papers in this users seminar. As with any software, user problems occur. User problems usually fall into the categories of input processing failure, code execution failure, restart/renodalization failure, unphysical result, and installation. This presentation will discuss some of the more generic user problems that have been reported on RELAP5-3D as well as their resolution.

Evaluation of errors set-up and setting margins calculation in treatments 3-D conformal radiotherapy; Evaluacion de errores de set-up y calculo de margenes de configuracion en tratamientos de radioterapia CONFORMADA 3-D

Energy Technology Data Exchange (ETDEWEB)

Donis, S.; Robayna, B.; Gonzalez, A.; Hernandez Armas, J.

2011-07-01

The use of IGRT techniques provide knowledge of the mistakes made in the positioning of a patient, to population studies and estimate the margins for each population.In this paper we evaluate the errors of set-up in 3 different locations and from these margins are calculated configuration (SM).

3D for Graphic Designers

CERN Document Server

Connell, Ellery

2011-01-01

Helping graphic designers expand their 2D skills into the 3D space The trend in graphic design is towards 3D, with the demand for motion graphics, animation, photorealism, and interactivity rapidly increasing. And with the meteoric rise of iPads, smartphones, and other interactive devices, the design landscape is changing faster than ever.2D digital artists who need a quick and efficient way to join this brave new world will want 3D for Graphic Designers. Readers get hands-on basic training in working in the 3D space, including product design, industrial design and visualization, modeling, ani

3D vector flow imaging

DEFF Research Database (Denmark)

Pihl, Michael Johannes

The main purpose of this PhD project is to develop an ultrasonic method for 3D vector flow imaging. The motivation is to advance the field of velocity estimation in ultrasound, which plays an important role in the clinic. The velocity of blood has components in all three spatial dimensions, yet...... are (vx, vy, vz) = (-0.03, 95, 1.0) ± (9, 6, 1) cm/s compared with the expected (0, 96, 0) cm/s. Afterwards, 3D vector flow images from a cross-sectional plane of the vessel are presented. The out of plane velocities exhibit the expected 2D circular-symmetric parabolic shape. The experimental results...... verify that the 3D TO method estimates the complete 3D velocity vectors, and that the method is suitable for 3D vector flow imaging....

RELAP5-3D User Problems

International Nuclear Information System (INIS)

Riemke, Richard Allan

2001-01-01

The Reactor Excursion and Leak Analysis Program with 3D capability (RELAP5-3D) is a reactor system analysis code that has been developed at the Idaho National Engineering and Environmental Laboratory (INEEL) for the U. S. Department of Energy (DOE). The 3D capability in RELAP5-3D includes 3D hydrodynamics and 3D neutron kinetics. Assessment, verification, and validation of the 3D capability in RELAP5-3D is discussed in the literature. Additional assessment, verification, and validation of the 3D capability of RELAP5-3D will be presented in other papers in this users seminar. As with any software, user problems occur. User problems usually fall into the categories of input processing failure, code execution failure, restart/renodalization failure, unphysical result, and installation. This presentation will discuss some of the more generic user problems that have been reported on RELAP5-3D as well as their resolution

Advanced 3-D Ultrasound Imaging

DEFF Research Database (Denmark)

Rasmussen, Morten Fischer

The main purpose of the PhD project was to develop methods that increase the 3-D ultrasound imaging quality available for the medical personnel in the clinic. Acquiring a 3-D volume gives the medical doctor the freedom to investigate the measured anatomy in any slice desirable after the scan has...... been completed. This allows for precise measurements of organs dimensions and makes the scan more operator independent. Real-time 3-D ultrasound imaging is still not as widespread in use in the clinics as 2-D imaging. A limiting factor has traditionally been the low image quality achievable using...... a channel limited 2-D transducer array and the conventional 3-D beamforming technique, Parallel Beamforming. The first part of the scientific contributions demonstrate that 3-D synthetic aperture imaging achieves a better image quality than the Parallel Beamforming technique. Data were obtained using both...

DELTA 3D PRINTER

Directory of Open Access Journals (Sweden)

ȘOVĂILĂ Florin

2016-07-01

Full Text Available 3D printing is a very used process in industry, the generic name being “rapid prototyping”. The essential advantage of a 3D printer is that it allows the designers to produce a prototype in a very short time, which is tested and quickly remodeled, considerably reducing the required time to get from the prototype phase to the final product. At the same time, through this technique we can achieve components with very precise forms, complex pieces that, through classical methods, could have been accomplished only in a large amount of time. In this paper, there are presented the stages of a 3D model execution, also the physical achievement after of a Delta 3D printer after the model.

Nivel de Ansiedad preoperatoria en los pacientes programados para cirugía

Directory of Open Access Journals (Sweden)

Vilma Margot Vivas

2009-12-01

Full Text Available El presente estudio tiene como objetivo principal, establecer la relación entre el grado de información del procedimiento quirúrgico con el nivel de ansiedad preoperatoria en los pacientes programados para cirugía de la Fundación Mario Gaitan Yanguas en el periodo comprendido de octubre-noviembre del 2008. Se realizó un estudio cuantitativo, descriptivo, correlacional y de corte transversal. Para la recolección de la información se utilizó Escala De Valoración De La Ansiedad De Spielberger Idare-Estado. La población está conformada por los pacientes que acuden al servicio de cirugía. Las variables utilizadas son información acerca de la cirugía, nivel de ansiedad y causas de la ansiedad. Se concluye que el 59% de los pacientes tenían conocimiento acerca del procedimiento, 50.9 % presentaron un nivel de ansiedad moderada; los procedimientos con mayor nivel de ansiedad fue colecistectomía 67% y herniorrafia inguinal 50%. En cuanto a la relación entre el procedimiento y el nivel de ansiedad, la cesárea + pomeroy y la conización presentaron un nivel de ansiedad alto; y la relación entre el grado de información del procedimiento y el nivel de ansiedad, se encontró que, a pesar de que la mayoría de los pacientes manifiestan conocer el procedimiento, predomina el nivel de ansiedad moderada y baja.

3-D Discrete Analytical Ridgelet Transform

OpenAIRE

Helbert , David; Carré , Philippe; Andrès , Éric

2006-01-01

International audience; In this paper, we propose an implementation of the 3-D Ridgelet transform: the 3-D discrete analytical Ridgelet transform (3-D DART). This transform uses the Fourier strategy for the computation of the associated 3-D discrete Radon transform. The innovative step is the definition of a discrete 3-D transform with the discrete analytical geometry theory by the construction of 3-D discrete analytical lines in the Fourier domain. We propose two types of 3-D discrete lines:...

Estudio de colabilidad de aluminio con modelos realizados en PLA por impresión 3D

OpenAIRE

Bustos Nuevo, Carolina

2016-01-01

El objetivo de este proyecto fin de carrera desarrollado en el Departamento de Siderurgia, es la obtención de piezas únicas para prototipado o de muy pequeña tirada por el proceso de fundición con modelos perdidos en polímeros fabricados por impresión 3D. Un proceso de fundición consiste, básicamente, en el vertido del metal líquido en un molde con la geometría de la pieza a fabricar en su interior y su posterior solidificación y enfriamiento. Para lograr dicho fin se mantendrá el sistema tra...

Tissue content of vitamin D₃ and 25-hydroxy vitamin D3 in minipigs after cutaneous synthesis, supplementation and deprivation of vitamin D₃

DEFF Research Database (Denmark)

Burild, Anders; Frandsen, Henrik Lauritz; Poulsen, Morten

2015-01-01

storages of vitamin D3 two studies were carried out in Göttingen minipigs. In study 1 one group of minipigs (n=2) was daily exposed to UV light corresponding to 10–20min of midday sun and another group (n=2) of pigs were fed up to 60μg vitamin D3/day corresponding to 3.7–4.4μg/kg body weight.Study 1......-hydroxy vitamin D3 in serum and skin- and subcutaneous adipose tissue biopsies were repeatedly monitored. Vitamin D3 and 25-hydroxy vitamin D3 were eliminated from the skin and the adipose tissue after UV-exposure was ceased. Supplementation of 13C-vitamin D3 did not seem to affect the decline...... demonstrated that daily UV-exposure of minipigs stimulated the cutaneous synthesis of vitamin D3 and resulted in increasing serum vitamin D3 and 25-hydroxy vitamin D3, but also carcasses containing vitamin D3 and 25-hydroxy vitamin D3. The vitamin D3 content in adipose tissue from the UV-exposed minipigs...

In situ repair of bone and cartilage defects using 3D scanning and 3D printing.

Science.gov (United States)

Li, Lan; Yu, Fei; Shi, Jianping; Shen, Sheng; Teng, Huajian; Yang, Jiquan; Wang, Xingsong; Jiang, Qing

2017-08-25

Three-dimensional (3D) printing is a rapidly emerging technology that promises to transform tissue engineering into a commercially successful biomedical industry. However, the use of robotic bioprinters alone is not sufficient for disease treatment. This study aimed to report the combined application of 3D scanning and 3D printing for treating bone and cartilage defects. Three different kinds of defect models were created to mimic three orthopedic diseases: large segmental defects of long bones, free-form fracture of femoral condyle, and International Cartilage Repair Society grade IV chondral lesion. Feasibility of in situ 3D bioprinting for these diseases was explored. The 3D digital models of samples with defects and corresponding healthy parts were obtained using high-resolution 3D scanning. The Boolean operation was used to achieve the shape of the defects, and then the target geometries were imported in a 3D bioprinter. Two kinds of photopolymerized hydrogels were synthesized as bioinks. Finally, the defects of bone and cartilage were restored perfectly in situ using 3D bioprinting. The results of this study suggested that 3D scanning and 3D bioprinting could provide another strategy for tissue engineering and regenerative medicine.

3-D magnetic field calculations for wiggglers using MAGNUS-3D

International Nuclear Information System (INIS)

Pissanetzky, S.; Tompkins, P.

1988-01-01

The recent but steady trend toward increased magnetic and geometric complexity in the design of wigglers and undulators, of which tapered wigglers, hybrid structures, laced electromagnetic wigglers, magnetic cladding, twisters and magic structures are examples, has caused a need for reliable 3-D computer models and a better understanding of the behavior of magnetic systems in three dimensions. The capabilities of the MAGNUS-3D Group of Programs are ideally suited to solve this class of problems and provide insight into 3-D effects. MAGNUS-3D can solve any problem of Magnetostatics involving permanent magnets, linear or nonlinear ferromagnetic materials and electric conductors of any shape in space. The magnetic properties of permanent magnets are described by the complete nonlinear demagnetization curve as provided by the manufacturer, or, at the user's choice, by a simpler approximation involving the coercive force, the residual induction and the direction of magnetization. The ferromagnetic materials are described by a magnetization table and an accurate interpolation relation. An internal library with properties of common industrial steels is available. The conductors are independent of the mesh and are described in terms of conductor elements from an internal library

AxiSEM3D: broadband seismic wavefields in 3-D aspherical Earth models

Science.gov (United States)

Leng, K.; Nissen-Meyer, T.; Zad, K. H.; van Driel, M.; Al-Attar, D.

2017-12-01

Seismology is the primary tool for data-informed inference of Earth structure and dynamics. Simulating seismic wave propagation at a global scale is fundamental to seismology, but remains as one of most challenging problems in scientific computing, because of both the multiscale nature of Earth's interior and the observable frequency band of seismic data. We present a novel numerical method to simulate global seismic wave propagation in realistic 3-D Earth models. Our method, named AxiSEM3D, is a hybrid of spectral element method and pseudospectral method. It reduces the azimuthal dimension of wavefields by means of a global Fourier series parameterization, of which the number of terms can be locally adapted to the inherent azimuthal smoothness of the wavefields. AxiSEM3D allows not only for material heterogeneities, such as velocity, density, anisotropy and attenuation, but also for finite undulations on radial discontinuities, both solid-solid and solid-fluid, and thereby a variety of aspherical Earth features such as ellipticity, topography, variable crustal thickness, and core-mantle boundary topography. Such interface undulations are equivalently interpreted as material perturbations of the contiguous media, based on the "particle relabelling transformation". Efficiency comparisons show that AxiSEM3D can be 1 to 3 orders of magnitude faster than conventional 3-D methods, with the speedup increasing with simulation frequency and decreasing with model complexity, but for all realistic structures the speedup remains at least one order of magnitude. The observable frequency range of global seismic data (up to 1 Hz) has been covered for wavefield modelling upon a 3-D Earth model with reasonable computing resources. We show an application of surface wave modelling within a state-of-the-art global crustal model (Crust1.0), with the synthetics compared to real data. The high-performance C++ code is released at github.com/AxiSEM3D/AxiSEM3D.

3D PHOTOGRAPHS IN CULTURAL HERITAGE

Directory of Open Access Journals (Sweden)

W. Schuhr

2013-07-01

Full Text Available This paper on providing "oo-information" (= objective object-information on cultural monuments and sites, based on 3D photographs is also a contribution of CIPA task group 3 to the 2013 CIPA Symposium in Strasbourg. To stimulate the interest in 3D photography for scientists as well as for amateurs, 3D-Masterpieces are presented. Exemplary it is shown, due to their high documentary value ("near reality", 3D photography support, e.g. the recording, the visualization, the interpretation, the preservation and the restoration of architectural and archaeological objects. This also includes samples for excavation documentation, 3D coordinate calculation, 3D photographs applied for virtual museum purposes and as educational tools. In addition 3D photography is used for virtual museum purposes, as well as an educational tool and for spatial structure enhancement, which in particular holds for inscriptions and in rock arts. This paper is also an invitation to participate in a systematic survey on existing international archives of 3D photographs. In this respect it is also reported on first results, to define an optimum digitization rate for analog stereo views. It is more than overdue, in addition to the access to international archives for 3D photography, the available 3D photography data should appear in a global GIS(cloud-system, like on, e.g., google earth. This contribution also deals with exposing new 3D photographs to document monuments of importance for Cultural Heritage, including the use of 3D and single lense cameras from a 10m telescope staff, to be used for extremely low earth based airborne 3D photography, as well as for "underwater staff photography". In addition it is reported on the use of captive balloon and drone platforms for 3D photography in Cultural Heritage. It is liked to emphasize, the still underestimated 3D effect on real objects even allows, e.g., the spatial perception of extremely small scratches as well as of nuances in

Comparative study of the interaction of meso-tetrakis (N-para-trimethyl-anilium) porphyrin (TMAP) in its free base and Fe derivative form with oligo(dA.dT)15 and oligo(dG.dC)15.

Science.gov (United States)

Bathaie, S Zahra; Ajloo, Davood; Daraie, Marzieh; Ghadamgahi, Maryam

2015-01-01

Interaction between a cationic porphyrin and its ferric derivative with oligo(dA.dT)15 and oligo(dG.dC)15 was studied by UV-vis spectroscopy, resonance light scattering (RLS), and circular dichroism (CD) at different ionic strengths; molecular docking and molecular dynamics simulation were also used for completion. Followings are the observed changes in the spectral properties of meso-tetrakis (N-para-trimethyl-anilium) porphyrin (TMAP), as a free-base porphyrin with no axial ligand, and its Fe derivative (FeTMAP) upon interaction with oligo(dA.dT)15 and oligo(dG.dC)15: (1) the substantial red shift and hypochromicity at the Soret maximum in the UV-vis spectra; (2) the increased RLS intensity by increasing the ionic strength; and (3) an intense bisignate excitonic CD signal. All of them are the reasons for TMAP and FeTMAP binding to oligo(dA.dT)15 and oligo(dG.dC)15 with the outside binding mode, accompanied by the self-stacking of the ligands along the oligonucleotide helix. The CD results demonstrated a drastic change from excitonic in monomeric behavior at higher ionic strengths, which indicates the groove binding of the ligands with oligonucleotides. Molecular docking also confirmed the groove binding mode of the ligands and estimated the binding constants and energies of the interactions. Their interaction trend was further confirmed by molecular dynamics technique and structure parameters obtained from simulation. It showed that TMAP reduced the number of intermolecular hydrogen bonds and increased the solvent accessible surface area in the oligonucleotide. The self-aggregation of ligands at lower concentrations was also confirmed.

Use of 3D reconstruction cloacagrams and 3D printing in cloacal malformations.

Science.gov (United States)

Ahn, Jennifer J; Shnorhavorian, Margarett; Amies Oelschlager, Anne-Marie E; Ripley, Beth; Shivaram, Giridhar M; Avansino, Jeffrey R; Merguerian, Paul A

2017-08-01

Cloacal anomalies are complex to manage, and the anatomy affects prognosis and management. Assessment historically includes examination under anesthesia, and genitography is often performed, but these do not consistently capture three-dimensional (3D) detail or spatial relationships of the anatomic structures. Three-dimensional reconstruction cloacagrams can provide a high level of detail including channel measurements and the level of the cloaca (3 cm), which typically determines the approach for surgical reconstruction and can impact long-term prognosis. Yet this imaging modality has not yet been directly compared with intra-operative or endoscopic findings. Our objective was to compare 3D reconstruction cloacagrams with endoscopic and intraoperative findings, as well as to describe the use of 3D printing to create models for surgical planning and education. An IRB-approved retrospective review of all cloaca patients seen by our multi-disciplinary program from 2014 to 2016 was performed. All patients underwent examination under anesthesia, endoscopy, 3D reconstruction cloacagram, and subsequent reconstructive surgery at a later date. Patient characteristics, intraoperative details, and measurements from endoscopy and cloacagram were reviewed and compared. One of the 3D cloacagrams was reformatted for 3D printing to create a model for surgical planning. Four patients were included for review, with the Figure illustrating 3D cloacagram results. Measurements of common channel length and urethral length were similar between modalities, particularly with confirming the level of cloaca. No patient experienced any complications or adverse effects from cloacagram or endoscopy. A model was successfully created from cloacagram images with the use of 3D printing technology. Accurate preoperative assessment for cloacal anomalies is important for counseling and surgical planning. Three-dimensional cloacagrams have been shown to yield a high level of anatomic detail. Here

Comparison of post-contrast 3D-T1-MPRAGE, 3D-T1-SPACE and 3D-T2-FLAIR MR images in evaluation of meningeal abnormalities at 3-T MRI.

Science.gov (United States)

Jeevanandham, Balaji; Kalyanpur, Tejas; Gupta, Prashant; Cherian, Mathew

2017-06-01

This study was to assess the usefulness of newer three-dimensional (3D)-T 1 sampling perfection with application optimized contrast using different flip-angle evolutions (SPACE) and 3D-T 2 fluid-attenuated inversion recovery (FLAIR) sequences in evaluation of meningeal abnormalities. 78 patients who presented with high suspicion of meningeal abnormalities were evaluated using post-contrast 3D-T 2 -FLAIR, 3D-T 1 magnetization-prepared rapid gradient-echo (MPRAGE) and 3D-T 1 -SPACE sequences. The images were evaluated independently by two radiologists for cortical gyral, sulcal space, basal cisterns and dural enhancement. The diagnoses were confirmed by further investigations including histopathology. Post-contrast 3D-T 1 -SPACE and 3D-T 2 -FLAIR images yielded significantly more information than MPRAGE images (p evaluation of meningeal abnormalities and when used in combination have the maximum sensitivity for leptomeningeal abnormalities. The negative-predictive value is nearly 100%, where no leptomeningeal abnormality was detected on these sequences. Advances in knowledge: Post-contrast 3D-T 1 -SPACE and 3D-T 2 -FLAIR images are more useful than 3D-T 1 -MPRAGE images in evaluation of meningeal abnormalities.

3D+time acquisitions of 3D cell culture by means of lens-free tomographic microscopy

Science.gov (United States)

Berdeu, Anthony; Laperrousaz, Bastien; Bordy, Thomas; Morales, S.; Gidrol, Xavier; Picollet-D'hahan, Nathalie; Allier, Cédric

2018-02-01

We propose a three-dimensional (3D) imaging platform based on lens-free microscopy to perform multi-angle acquisitions on 3D cell cultures embedded in extracellular matrix (ECM). We developed algorithms based on the Fourier diffraction theorem to perform fully 3D reconstructions of biological samples and we adapted the lens-free microscope to incubator conditions. Here we demonstrate for the first time, 3D+time lens-free acquisitions of 3D cell culture over 8 days directly into the incubator. The 3D reconstructed volume is as large as 5 mm3 and provides a unique way to observe in the same 3D cell culture experiment multiple cell migration strategies. Namely, in a 3D cell culture of prostate epithelial cells embedded within a Matrigel® matrix, we are able to distinguish single cell 'leaders', migration of cell clusters, migration of large aggregates of cells, and also close-gap and large-scale branching. In addition, we observe long-scale 3D deformations of the ECM that modify the geometry of the 3D cell culture. Interestingly, we also observed the opposite, i.e. we found that large aggregates of cells may deform the ECM by generating traction forces over very long distances. In sum we put forward a novel 3D lens-free microscopy tomographic technique to study the single and collective cell migrations, the cell-to-cell interactions and the cell-to-matrix interactions.

Applications of 2D to 3D conversion for educational purposes

Science.gov (United States)

Koido, Yoshihisa; Morikawa, Hiroyuki; Shiraishi, Saki; Takeuchi, Soya; Maruyama, Wataru; Nakagori, Toshio; Hirakata, Masataka; Shinkai, Hirohisa; Kawai, Takashi

2013-03-01

There are three main approaches creating stereoscopic S3D content: stereo filming using two cameras, stereo rendering of 3D computer graphics, and 2D to S3D conversion by adding binocular information to 2D material images. Although manual "off-line" conversion can control the amount of parallax flexibly, 2D material images are converted according to monocular information in most cases, and the flexibility of 2D to S3D conversion has not been exploited. If the depth is expressed flexibly, comprehensions and interests from converted S3D contents are anticipated to be differed from those from 2D. Therefore, in this study we created new S3D content for education by applying 2D to S3D conversion. For surgical education, we created S3D surgical operation content under a surgeon using a partial 2D to S3D conversion technique which was expected to concentrate viewers' attention on significant areas. And for art education, we converted Ukiyoe prints; traditional Japanese artworks made from a woodcut. The conversion of this content, which has little depth information, into S3D, is expected to produce different cognitive processes from those evoked by 2D content, e.g., the excitation of interest, and the understanding of spatial information. In addition, the effects of the representation of these contents were investigated.

Convivencia escolar para la ciudadanía a la luz de las dimensiones declaradas por la UNESCO: percepción de los estudiantes de segundo ciclo

Directory of Open Access Journals (Sweden)

Daniel Sáez Sotomayor

2018-02-01

Full Text Available El presente estudio busca evaluar la convivencia escolar para la ciudadanía en sus dimensiones de Inclusión, Democracia y Paz en estudiantes de segundo ciclo básico de dos establecimientos con indicadores de alta vulnerabilidad. Para el presente estudio se utilizó un instrumento validado por Chaparro, A., et al (2013 de la Universidad Autónoma de Baja California.La investigación es de carácter no experimental y de tipo Encuesta (Labarca, A. 2001. De acuerdo a Hernández (2000 es descriptiva. Su enfoque fue cuantitativo. La muestra de estudiantes a quienes se les aplicó el cuestionario estuvo conformada por 267 estudiantes. Como principales resultados se obtuvo que existe un trato respetuoso de los profesores a los estudiantes, que hay acciones docentes de buen trato y apoyo a estudiantes con dificultad y que existe confianza mutua entre estudiantes y docente. Como aspectos a mejorar se muestra que aun que las relaciones entre docentes y estudiantes son buenas no hay un trato equitativo con los estudiantes y no se percibe promoción de trabajo colaborativo entre estudiantes.

Underwater 3D filming

OpenAIRE

Rinaldi, Roberto

2014-01-01

After an experimental phase of many years, 3D filming is now effective and successful. Improvements are still possible, but the film industry achieved memorable success on 3D movie’s box offices due to the overall quality of its products. Special environments such as space (“Gravity” ) and the underwater realm look perfect to be reproduced in 3D. “Filming in space” was possible in “Gravity” using special effects and computer graphic. The underwater realm is still difficult to be handled. Unde...

Relative effectiveness of oral 25-hydroxyvitamin D3 and vitamin D3 in raising wintertime serum 25-hydroxyvitamin D in older adults.

Science.gov (United States)

Cashman, Kevin D; Seamans, Kelly M; Lucey, Alice J; Stöcklin, Elisabeth; Weber, Peter; Kiely, Mairead; Hill, Tom R

2012-06-01

The relative potency of 25-hydroxyvitamin D3 to vitamin D3 needs to be better defined so that food-composition tables can better reflect the true vitamin D nutritive value of certain foods. We performed a randomized, controlled intervention study in apparently healthy, free-living adults to investigate whether the intake of 25-hydroxyvitamin D3 is 5 times more potent in raising serum 25-hydroxyvitamin D [25(OH)D] during winter compared with an equivalent amount of vitamin D3. A randomized, placebo-controlled, double-blind intervention study was conducted in adults aged ≥50 y (n = 56) who consumed a placebo, 20 μg vitamin D3, or 7 or 20 μg 25-hydroxyvitamin D3 daily throughout 10 wk of winter. Serum 25(OH)D was measured by using an enzyme-linked immunoassay, and serum albumin-corrected calcium (S-Ca) was assessed colorimetrically at the baseline, midpoint, and endpoint of the study. The mean (±SD) increases (per microgram of vitamin D compound) in serum 25(OH)D concentrations over baseline after 10 wk of supplementation were 0.96 ± 0.62, 4.02 ± 1.27, and 4.77 ± 1.04 nmol · L(-1) · μg intake(-1) for the 20-μg vitamin D3/d and 7- and 20-μg 25-hydroxyvitamin D3/d groups, respectively. A comparison of the 7- and 20-μg 25-hydroxyvitamin D3/d groups with the 20-μg vitamin D3/d group yielded conversion factors of 4.2 and 5, respectively. There was no effect of treatment on S-Ca concentrations and no incidence of hypercalcemia (S-Ca >2.6 nmol/L). Each microgram of orally consumed 25-hydroxyvitamin D3 was about 5 times more effective in raising serum 25(OH)D in older adults in winter than an equivalent amount of vitamin D3. This conversion factor could be used in food-compositional tables for relevant foods. This study was registered at clinicaltrials.gov as NCT01398202.

Abusir 3D survey 2015

Directory of Open Access Journals (Sweden)

Yukinori Kawae

2016-12-01

Full Text Available In 2015, in collaboration with the Czech Institute of Egyptology, we, a Japanese consortium, initiated the Abusir 3D Survey (A-3DS for the 3D documentation of the site’s pyramids, which have not been updated since the time of the architectural investigations of Vito Maragioglio and Celeste Rinaldi in the 1960s to the 1970s. The first season of our project focused on the exterior of Neferirkare’s pyramid, the largest pyramid at Abusir. By developing a strategic mathematical 3D survey plan, step-by-step 3D documentation to suit specific archaeological needs, and producing a new display method for the 3D data, we successfully measured the dimensions of the pyramid in a cost-effective way.

DYNA3D2000*, Explicit 3-D Hydrodynamic FEM Program

International Nuclear Information System (INIS)

Lin, J.

2002-01-01

1 - Description of program or function: DYNA3D2000 is a nonlinear explicit finite element code for analyzing 3-D structures and solid continuum. The code is vectorized and available on several computer platforms. The element library includes continuum, shell, beam, truss and spring/damper elements to allow maximum flexibility in modeling physical problems. Many materials are available to represent a wide range of material behavior, including elasticity, plasticity, composites, thermal effects and rate dependence. In addition, DYNA3D has a sophisticated contact interface capability, including frictional sliding, single surface contact and automatic contact generation. 2 - Method of solution: Discretization of a continuous model transforms partial differential equations into algebraic equations. A numerical solution is then obtained by solving these algebraic equations through a direct time marching scheme. 3 - Restrictions on the complexity of the problem: Recent software improvements have eliminated most of the user identified limitations with dynamic memory allocation and a very large format description that has pushed potential problem sizes beyond the reach of most users. The dominant restrictions remain in code execution speed and robustness, which the developers constantly strive to improve

Analysis of the 3d9ns (n = 5, 6), 3d95p, 3d94f and 3d84s4p configurations of five times ionized arsenic (As VI)

International Nuclear Information System (INIS)

Ryabtsev, A.N.; Gayasov, R.R.; Joshi, Y.N.; Van het Hof, G.J.

1993-01-01

The spectrum of arsenic was photographed in the 100-1250 A region on grazing and normal incidence spectrographs. The spectrum of As VI was extended. Seven out of eight levels of the 3d 9 5s and 6s configurations, 12 out of 12 levels of the 3d 9 5p configuration, 13 out of 20 levels of the 3d 9 4f configuration and 35 levels belonging to the 3d 9 4s4p configuration have been established. Least-Square-Fitted parametric calculations involving configuration interactions both in even and odd parity systems were carried out to adequately interpret the spectrum. One hundred and thirty-two additional lines were classified in the As VI spectrum. A new value of the ionization limit was obtained. Thus, the 3d 9 2 D 5/2 ground level in As VII lies 977500 cm -1 (121.17 eV) above the As VI ground state. (orig.)

Para neoplastic syndromes: Usefulness of 18F-fluoro-deoxy-glucose (F.D.G.) positron emission tomography (PET)

International Nuclear Information System (INIS)

Banayan, S.; Janier, M.; Guillerma-Zucchi, N.; Billotey, C.; Ninet, J.; Delmas, P.; Thivolet, C.; Pellet, O.

2008-01-01

Background We evaluated the performance of 18 F-fluorodeoxyglucose ( 18 F.D.G.) positron emission tomography (PET) in the diagnosis of underlying malignancy in cases of suspected para neoplastic syndrome (P.S.). Methods 18 F.D.G.-PET was performed in 31 patients, clinically suspected to have P.S.. The P.S. were 34, among which 12 neurological diseases, eight endocrine, seven rheumatological, one dermatological and six vascular. We compared computed tomography (CT), iodine-enhanced most of the time, and 18 F.D.G.-PET reports to clinicians definitive conclusion at the end of the work-up and a follow-up period of, at least, two months. Results We obtained a histological diagnosis of cancer for ten patients, but could only identify the primary site of malignancy for nine of them. 18 F.D.G.-PET showed six primary sites among which three were not seen on CT. CT disclosed four primary sites, among which one was not seen on 18 F.D.G.-PET. In one case, 18 F.D.G.-PET disclosed regional lymph node metastases whereas these were not identified by CT. Eleven non-neoplastic causes were evidenced, among which 18 F.D.G.-PET played a major role in three cases. Ten causes were still undetermined at the end of the study. Conclusion Whole-body 18 F.D.G.-PET study plays an important role in the identification of underlying malignancy in clinically suspected para neoplastic syndromes; either by identifying the primary tumor or by directing biopsy of metastases. Furthermore, it can identify non-neoplastic causes. (authors)

Potencies of vitamin D analogs, 1α-hydroxyvitamin D3 , 1α-hydroxyvitamin D2 and 25-hydroxyvitamin D3 , in lowering cholesterol in hypercholesterolemic mice in vivo.

Science.gov (United States)

Quach, Holly P; Dzekic, Tamara; Bukuroshi, Paola; Pang, K Sandy

2018-04-01

Vitamin D 3 and the synthetic vitamin D analogs, 1α-hydroxyvitamin D 3 [1α(OH)D 3 ], 1α-hydroxyvitamin D 2 [1α(OH)D 2 ] and 25-hydroxyvitamin D 3 [25(OH)D 3 ] were appraised for their vitamin D receptor (VDR) associated-potencies as cholesterol lowering agents in mice in vivo. These precursors are activated in vivo: 1α(OH)D 3 and 1α(OH)D 2 are transformed by liver CYP2R1 and CYP27A1 to active VDR ligands, 1α,25-dihydroxyvitamin D 3 [1,25(OH) 2 D 3 ] and 1α,25-dihydroxyvitamin D 2 [1,25(OH) 2 D 2 ] , respectively. 1α(OH)D 2 may also be activated by CYP24A1 to 1α,24-dihydroxyvitamin D 2 [1,24(OH) 2 D 2 ], another active VDR ligand. 25(OH)D 3 , the metabolite formed via CYP2R1 and or CYP27A1 in liver from vitamin D 3 , is activated by CYP27B1 in the kidney to 1,25(OH) 2 D 3 . In C57BL/6 mice fed the high fat/high cholesterol Western diet for 3 weeks, vitamin D analogs were administered every other day intraperitoneally during the last week of the diet. The rank order for cholesterol lowering, achieved via mouse liver small heterodimer partner (Shp) inhibition and increased cholesterol 7α-hydroxylase (Cyp7a1) expression, was: 1.75 nmol/kg 1α(OH)D 3  > 1248 nmol/kg 25(OH)D 3 (dose ratio of 0.0014) > > 1625 nmol/kg vitamin D 3 . Except for 1.21 nmol/kg 1α(OH)D 2 that failed to lower liver and plasma cholesterol contents, a significant negative correlation was observed between the liver concentration of 1,25(OH) 2 D 3 formed from the precursors and liver cholesterol levels. The composite results show that vitamin D analogs 1α(OH)D 3 and 25(OH)D 3 exhibit cholesterol lowering properties upon activation to 1,25(OH) 2 D 3 : 1α(OH)D 3 is rapidly activated by liver enzymes and 25(OH)D 3 is slowly activated by renal Cyp27b1 in mouse. Copyright © 2018 John Wiley & Sons, Ltd.

A 3D Printing Model Watermarking Algorithm Based on 3D Slicing and Feature Points

Directory of Open Access Journals (Sweden)

Giao N. Pham

2018-02-01

Full Text Available With the increase of three-dimensional (3D printing applications in many areas of life, a large amount of 3D printing data is copied, shared, and used several times without any permission from the original providers. Therefore, copyright protection and ownership identification for 3D printing data in communications or commercial transactions are practical issues. This paper presents a novel watermarking algorithm for 3D printing models based on embedding watermark data into the feature points of a 3D printing model. Feature points are determined and computed by the 3D slicing process along the Z axis of a 3D printing model. The watermark data is embedded into a feature point of a 3D printing model by changing the vector length of the feature point in OXY space based on the reference length. The x and y coordinates of the feature point will be then changed according to the changed vector length that has been embedded with a watermark. Experimental results verified that the proposed algorithm is invisible and robust to geometric attacks, such as rotation, scaling, and translation. The proposed algorithm provides a better method than the conventional works, and the accuracy of the proposed algorithm is much higher than previous methods.

The analysis of the 3d8, 3d74p and 3p53d9 configurations of Se IX

International Nuclear Information System (INIS)

Kleef, T.A.M. van; Uylings, P.; Joshi, Y.N.; Podobedova, L.I.; Ryabtsev, A.N.

1984-01-01

The ninth spectrum of selenium (Se IX) was photographed in the region 100-140 A on a variety of grazing incidence spectrographs using a triggered spark or an open spark as sources. On the basis of these measurements all levels of the 3d 8 configuration, 11 out of 12 levels of the 3p 5 3d 9 configuration and 95 out of 110 levels of the 3d 7 4p configuration have been established. A strong configuration interaction exists between the two odd configurations. Least-squares-fit and Hartree-Fock parameter calculations support the analysis. Two hundred and twenty-five (225) lines have been classified in Se IX. (orig.)

AUTOIGNICION 3-D EN DEPOSITOS DE LODOS PROVENIENTES DE TRATAMIENTOS DE AGUAS RESIDUALES 3D SELF IGNITION IN SEWAGE SLUDGE WASTE WATER TREAMENT

Directory of Open Access Journals (Sweden)

Nelson Moraga B

2008-09-01

Full Text Available Se estudia el transporte de calor y de oxígeno por difusión en pilas de compostajes provenientes de tratamiento de aguas municipales. El modelo 3-D transiente incluye la generación de calor originada por microorganismos y por la descomposición de la celulosa. El sistema de ecuaciones acopladas de difusión de calor y materia se resuelve con el método de volúmenes finitos. Los resultados predicen la variación en el tiempo de la distribución de temperatura y oxígeno. El análisis de los resultados permite proponer un nuevo sistema para el almacenamiento de lodos con el fin de evitar su autoignición.Heat and oxygen transport by diffusion in sewage sludge piles obtained from water treatment is studied. The 3D unsteady mathematical model incorporates the heat generated by microorganisms and by cellulose decomposition. The coupled heat and mass diffusion equations system of partial differential equations is solved by the finite volume method. The results obtained allow predicting the time history of temperature and oxygen concentration distributions. Results analysis suggests a new way to build the solid waste compost piles.

Estrategias para el Fortalecimiento del Clima Organizacional en el Personal de la Unidad Educativa Débora Medina Vivas

Directory of Open Access Journals (Sweden)

Eloina Sánchez

2016-06-01

Full Text Available El presente reporte de investigación tuvo como objetivo general, diseñar estrategias para el fortalecimiento del clima organizacional, en el personal docente de la Unidad Educativa Nacional Débora Medina Vivas. La investigación se ubicó bajo un diseño de campo y fue de tipo descriptivo. El diagnóstico fue realizado a través de la técnica de encuesta, al efecto se utilizó un cuestionario contentivo de treinta (30 ítems, el cual se aplicó a la muestra seleccionada, la que estuvo conformada por veintiocho (28 docentes que laboran en la institución objeto de estudio. El instrumento se validó mediante el juicio de expertos. El análisis y la interpretación de resultados se realizó con base en los datos de las respuestas cerradas, derivadas de la aplicación del instrumento, se organizaron gráficos para el subsiguiente análisis. La interpretación de los resultados generó una serie de conclusiones, se determinó la necesidad de fortalecer el clima organizacional. Sobre la base de los resultados se diseñó una propuesta estructurada en estrategias. Se concluye con la necesidad de mejorar en las instituciones la comunicación y el compañerismo entre todo el personal.

Computationally efficient storage of 3D particle intensity and position data for use in 3D PIV and 3D PTV

International Nuclear Information System (INIS)

Atkinson, C; Buchmann, N A; Soria, J

2013-01-01

Three-dimensional (3D) volumetric velocity measurement techniques, such as tomographic or holographic particle image velocimetry (PIV), rely upon the computationally intensive formation, storage and localized interrogation of multiple 3D particle intensity fields. Calculation of a single velocity field typically requires the extraction of particle intensities into tens of thousands of 3D sub-volumes or discrete particle clusters, the processing of which can significantly affect the performance of 3D cross-correlation based PIV and 3D particle tracking velocimetry (PTV). In this paper, a series of popular and customized volumetric data formats are presented and investigated using synthetic particle volumes and experimental data arising from tomographic PIV measurements of a turbulent boundary layer. Results show that the use of a sub-grid ordered non-zero intensity format with a sub-grid size of 16 × 16 × 16 points provides the best performance for cross-correlation based PIV analysis, while a particle clustered non-zero intensity format provides the best format for PTV applications. In practical tomographic PIV measurements the sub-grid ordered non-zero intensity format offered a 29% improvement in reconstruction times, while providing a 93% reduction in volume data requirements and a 28% overall improvement in cross-correlation based velocity analysis and validation times. (paper)

3D shape detection of the indoor space based on 3D-Hough method

OpenAIRE

安齋, 達也; ANZAI, Tatsuya

2013-01-01

This paper describes methods for detecting the 3D shapes of the indoor space that is represented as a combination of planes such as a wall, desk, or whatnot. Detecting the planes makes it possible to perform calibration of multiple sensors and 3D mapping, and then produces various services such as the acquisition of life logs, AR interaction, and invader detection. This paper proposes and verifies three algorithms. First, it mentions a way to use2D-Hough.The proposed technique converts 3D dat...

Hybrid 3D printing and electrodeposition approach for controllable 3D alginate hydrogel formation.

Science.gov (United States)

Shang, Wanfeng; Liu, Yanting; Wan, Wenfeng; Hu, Chengzhi; Liu, Zeyang; Wong, Chin To; Fukuda, Toshio; Shen, Yajing

2017-06-07

Calcium alginate hydrogels are widely used as biocompatible materials in a substantial number of biomedical applications. This paper reports on a hybrid 3D printing and electrodeposition approach for forming 3D calcium alginate hydrogels in a controllable manner. Firstly, a specific 3D hydrogel printing system is developed by integrating a customized ejection syringe with a conventional 3D printer. Then, a mixed solution of sodium alginate and CaCO 3 nanoparticles is filled into the syringe and can be continuously ejected out of the syringe nozzle onto a conductive substrate. When applying a DC voltage (∼5 V) between the substrate (anode) and the nozzle (cathode), the Ca 2+ released from the CaCO 3 particles can crosslink the alginate to form calcium alginate hydrogel on the substrate. To elucidate the gel formation mechanism and better control the gel growth, we can further establish and verify a gel growth model by considering several key parameters, i.e., applied voltage and deposition time. The experimental results indicate that the alginate hydrogel of various 3D structures can be formed by controlling the movement of the 3D printer. A cell viability test is conducted and shows that the encapsulated cells in the gel can maintain a high survival rate (∼99% right after gel formation). This research establishes a reliable method for the controllable formation of 3D calcium alginate hydrogel, exhibiting great potential for use in basic biology and applied biomedical engineering.

3D virtuel udstilling

DEFF Research Database (Denmark)

Tournay, Bruno; Rüdiger, Bjarne

2006-01-01

3d digital model af Arkitektskolens gård med virtuel udstilling af afgangsprojekter fra afgangen sommer 2006. 10 s.......3d digital model af Arkitektskolens gård med virtuel udstilling af afgangsprojekter fra afgangen sommer 2006. 10 s....

Surface Length 3D: Plugin do OsiriX para cálculo da distância em superfícies

Directory of Open Access Journals (Sweden)

Alexandre Campos Moraes Amato

Full Text Available Resumo Softwares tradicionais de avaliação de imagens médicas, como DICOM, possuem diversas ferramentas para mensuração de distância, área e volume. Nenhuma delas permite medir distâncias entre pontos em superfícies. O menor trajeto entre pontos possibilita o cálculo entre óstios de vasos, como no caso de aneurismas aórticos, e a avaliação dos vasos viscerais para planejamento cirúrgico. O desenvolvimento de um plugin para OsiriX para mensuração de distâncias em superfícies mostrou-se factível. A validação da ferramenta ainda se faz necessária.

The 3-dimensional core model DYN3D

Energy Technology Data Exchange (ETDEWEB)

Grundmann, U.; Mittag, S.; Rohde, U.

1999-01-01

Analyzing the safety margins in transients and accidents of nuclear reactors 3-dimensional models of the core were used to avoid conservative assumptions needed for point kinetics or 1-dimensional models. Therefore, the 3D code DYN3D has been developed for the analysis of reactivity initiated accidents (RIA) in thermal nuclear reactors. The power distributions are calculated with the help of nodal expansion methods (NEM) for hexagonal and Cartesian geometry. The fuel rod model and the thermohydraulic part provide fuel temperatures, coolant temperatures and densities as well as boron concentrations for the calculation of feedback effects on the basis of cross section libraries generated by cell codes. Safety relevant parameters like maximum fuel and cladding temperatures, critical heat flux and degree of cladding oxidation are estimated. DYN3D can analyze RIA initiated by moved control rods and/or perturbations of the coolant flow. Stationary and transient boundary conditions for the coolant flow, the core inlet temperatures and boron concentrations at the core inlet have to be given. For analyzing more complex transients the code DYN3D is coupled with the plant model ATHLET of the GRS. The extensive validation work accomplished for DYN3D is presented in several examples. Some applications of the code are described. (orig.) [Deutsch] Die Verwendung 3-dimensionaler Kernmodelle zur Untersuchung der Sicherheitsreserven bei Uebergangsprozessen und Stoerfaellen in Kernreaktoren vermeidet konservative Annahmen, die bei der Benutzung des Punktmodells oder 1-dimensionaler Modelle erforderlich sind. Aus diesen Gruenden wurde das 3-dimensionale Rechenprogramm DYN3D fuer die Untersuchung von Reaktivitaetsstoerfaellen in thermischen Reaktoren entwickelt. Die Leistungsverteilung wird mit nodalen Methoden fuer hexagonale oder kartesische Geometrie berechnet. Das Brennstabmodell und der thermohydraulische Teil von DYN3D liefert die Brennstofftemperaturen, Kuehlmitteltemperaturen

Efeitos do Ácido L-Glutâmico e da Vitamina D3 no Desempenho e nas Anomalias Ósseas de Pintos de Corte

Directory of Open Access Journals (Sweden)

Silva Fernanda Alvares da

2001-01-01

Full Text Available Um experimento foi conduzido para estudar os efeitos de níveis de ácido L-Glutâmico (L-Glu e vitamina D3 (VD da dieta em pintos de corte de um dia, machos, Hubbard, recebendo dieta básica purificada, contendo todos os L-aminoácidos essenciais, minerais e vitaminas (exceto vitamina D3, suplementada com 5, 10 e 15% de L-Glu, combinados com 0, 5.000, 10.000 e 15.000 UI de vitamina D3. O experimento foi realizado utilizando-se esquema fatorial, em delineamento inteiramente casualizado 3 x 4, com quatro repetições de sete aves cada. O ganho de peso aumentou até o nível máximo estimado, de 8,56% de L-Glu e 15.000 UI de vitamina D3. A melhor taxa de conversão alimentar foi verificada com nível estimado de 8,40% de L-Glu. O maior consumo de ração estimado foi obtido com 8,48% de L-Glu e 15.000 UI de vitamina D3. Houve redução na incidência de problemas de pernas com 10% de L-Glu e 15.000 UI de vitamina D3. L-Glu estimado em 8,56% e 15.000 UI de vitamina D3 permitiu um melhor desempenho das aves, confirmando que esse aminoácido é boa fonte de nitrogênio não-específico para maximizar o desempenho e reduzir a incidência de problemas de pernas.

The 3D additivist cookbook

NARCIS (Netherlands)

Allahyari, Morehshin; Rourke, Daniel; Rasch, Miriam

The 3D Additivist Cookbook, devised and edited by Morehshin Allahyari & Daniel Rourke, is a free compendium of imaginative, provocative works from over 100 world-leading artists, activists and theorists. The 3D Additivist Cookbook contains .obj and .stl files for the 3D printer, as well as critical

From 2D to 3D: The morphology, proliferation and differentiation of MC3T3-E1 on silk fibroin/chitosan matrices.

Science.gov (United States)

Li, Da-Wei; He, Feng-Li; He, Jin; Deng, Xudong; Liu, Ya-Li; Liu, Yang-Yang; Ye, Ya-Jing; Yin, Da-Chuan

2017-12-15

It has been widely accepted that cell culture in two-dimensional (2D) conditions may not be able to represent growth in three-dimensional (3D) conditions. Systematic comparisons between 2D and 3D cell cultures are needed to appropriately use the existing 2D results. In this work, we conducted a comparative study between 2D and 3D cell cultures of MC3T3-E1 using the same type of material (a mixture of silk fibroin (SF) and chitosan (CS)). Our results showed 3D SF/CS scaffold exhibited different effects on cell culture compared with the 2D cases. 1) The cells grown in 3D scaffold showed multiple morphologies. 2) The proliferation of cells in 3D scaffold was long-term and sustainable. 3) Cell differentiation occurred throughout the entire 3D scaffold. The results showed that cell culture in 3D SF/CS scaffold exhibited different features than 2D cases and 3D SF/CS scaffold could be a promising material for 3D cell culture. Copyright © 2017 Elsevier Ltd. All rights reserved.

Qademah Fault 3D Survey

KAUST Repository

Hanafy, Sherif M.

2014-01-01

Objective: Collect 3D seismic data at Qademah Fault location to 1. 3D traveltime tomography 2. 3D surface wave migration 3. 3D phase velocity 4. Possible reflection processing Acquisition Date: 26 – 28 September 2014 Acquisition Team: Sherif, Kai, Mrinal, Bowen, Ahmed Acquisition Layout: We used 288 receiver arranged in 12 parallel lines, each line has 24 receiver. Inline offset is 5 m and crossline offset is 10 m. One shot is fired at each receiver location. We use the 40 kgm weight drop as seismic source, with 8 to 15 stacks at each shot location.

Investigate the potential fabrication of a working compound gearbox in ABS and or PLA by 3D-Printing

OpenAIRE

Mogollón, Joaquín

2014-01-01

El presente estudio se concentra en comprobar la viabilidad de utilizar el método de manufactura por adición o impresión en 3d para producir engranes funcionales. Se diseño una caja de cambios simple que reduzca la velocidad de 2:1 y se manufacturo los componentes en la impresora 3d Up Plus 2 en ABS y en PLA, también se experimentó con un material nuevo conocido como T-glase. Este proyecto de tesis contiene información de la manufactura por adición de capas, sus aplicaciones, avances e inves...

R3D Align web server for global nucleotide to nucleotide alignments of RNA 3D structures.

Science.gov (United States)

Rahrig, Ryan R; Petrov, Anton I; Leontis, Neocles B; Zirbel, Craig L

2013-07-01

The R3D Align web server provides online access to 'RNA 3D Align' (R3D Align), a method for producing accurate nucleotide-level structural alignments of RNA 3D structures. The web server provides a streamlined and intuitive interface, input data validation and output that is more extensive and easier to read and interpret than related servers. The R3D Align web server offers a unique Gallery of Featured Alignments, providing immediate access to pre-computed alignments of large RNA 3D structures, including all ribosomal RNAs, as well as guidance on effective use of the server and interpretation of the output. By accessing the non-redundant lists of RNA 3D structures provided by the Bowling Green State University RNA group, R3D Align connects users to structure files in the same equivalence class and the best-modeled representative structure from each group. The R3D Align web server is freely accessible at http://rna.bgsu.edu/r3dalign/.

Hybrid 3D-2D printing for bone scaffolds fabrication

Science.gov (United States)

Seleznev, V. A.; Prinz, V. Ya

2017-02-01

It is a well-known fact that bone scaffold topography on micro- and nanometer scale influences the cellular behavior. Nano-scale surface modification of scaffolds allows the modulation of biological activity for enhanced cell differentiation. To date, there has been only a limited success in printing scaffolds with micro- and nano-scale features exposed on the surface. To improve on the currently available imperfect technologies, in our paper we introduce new hybrid technologies based on a combination of 2D (nano imprint) and 3D printing methods. The first method is based on using light projection 3D printing and simultaneous 2D nanostructuring of each of the layers during the formation of the 3D structure. The second method is based on the sequential integration of preliminarily created 2D nanostructured films into a 3D printed structure. The capabilities of the developed hybrid technologies are demonstrated with the example of forming 3D bone scaffolds. The proposed technologies can be used to fabricate complex 3D micro- and nanostructured products for various fields.

Proposal of custom made wrist orthoses based on 3D modelling and 3D printing.

Science.gov (United States)

Abreu de Souza, Mauren; Schmitz, Cristiane; Marega Pinhel, Marcelo; Palma Setti, Joao A; Nohama, Percy

2017-07-01

Accessibility to three-dimensional (3D) technologies, such as 3D scanning systems and additive manufacturing (like 3D printers), allows a variety of 3D applications. For medical applications in particular, these modalities are gaining a lot of attention enabling several opportunities for healthcare applications. The literature brings several cases applying both technologies, but none of them focus on the spreading of how this technology could benefit the health segment. This paper proposes a new methodology, which employs both 3D modelling and 3D printing for building orthoses, which could better fit the demands of different patients. Additionally, there is an opportunity for sharing expertise, as it represents a trendy in terms of the maker-movement. Therefore, as a result of the proposed approach, we present a case study based on a volunteer who needs an immobilization orthosis, which was built for exemplification of the whole process. This proposal also employs freely available 3D models and software, having a strong social impact. As a result, it enables the implementation and effective usability for a variety of built to fit solutions, hitching useful and smarter technologies for the healthcare sector.

Desarrollo de un instrumento para la evaluación del malestar emocional para pacientes renales en diálisis

Directory of Open Access Journals (Sweden)

Helena García-Llana

Full Text Available Objetivo: Actualmente no existen herramientas validadas para evaluar el malestar emocional en pacientes con enfermedad renal crónica, pese a su alta prevalencia en todas las etapas de la patología. Este trabajo describe el desarrollo de un instrumento breve semiestructurado para la Evaluación del malestar Emocional de los pacientes renales en Diálisis (EE-D. Método: El EE-D incluye cinco preguntas con distintos formatos de respuesta (dicotómico, Likert y preguntas abiertas para evaluar tristeza, ansiedad, preocupaciones, recursos para afrontar la enfermedad, signos externos de malestar y observaciones. Los ítems de la primera versión se sometieron a un estudio interjueces (N= 10. Posteriormente se realizó un estudio piloto multicéntrico (N= 25 pacientes en 5 hospitales. Resultados: Tras el estudio interjueces un ítem fue eliminado, y otro añadido. Tras el piloto no hubo modificaciones. La puntuación media (sobre 10 fue 4,16 (DT: 3,41 en tristeza y 3,68 (DT: 3,48 en ansiedad. El 48% refirió preocupaciones familiares, el 44% preocupaciones sobre su estado emocional-psicológico y el 40% sobre su enfermedad/tratamientos. Los principales recursos identificados fueron la esperanza en la posibilidad de trasplante y el apoyo social. A juicio de enfermería el 24% presentan expresión facial de malestar y el 16% otros signos de malestar. Discusión: El EE-D muestra unas garantías psicométricas preliminares. Ha sido distribuido en las Unidades de Diálisis de todo el territorio nacional con el objetivo de su implementación clínica en un marco investigador, lo que permitirá el desarrollo de futuros estudios de validación multicéntricos.

The NIH 3D Print Exchange: A Public Resource for Bioscientific and Biomedical 3D Prints

OpenAIRE

Coakley, Meghan F.; Hurt, Darrell E.; Weber, Nick; Mtingwa, Makazi; Fincher, Erin C.; Alekseyev, Vsevelod; Chen, David T.; Yun, Alvin; Gizaw, Metasebia; Swan, Jeremy; Yoo, Terry S.; Huyen, Yentram

2014-01-01

The National Institutes of Health (NIH) has launched the NIH 3D Print Exchange, an online portal for discovering and creating bioscientifically relevant 3D models suitable for 3D printing, to provide both researchers and educators with a trusted source to discover accurate and informative models. There are a number of online resources for 3D prints, but there is a paucity of scientific models, and the expertise required to generate and validate such models remains a barrier. The NIH 3D Print ...

Vrste i tehnike 3D modeliranja

OpenAIRE

Bernik, Andrija

2010-01-01

Proces stvaranja 3D stvarnih ili imaginarnih objekata naziva se 3D modeliranje. Razvoj računalne tehnologije omogućuje korisniku odabir raznih metoda i tehnika kako bi se postigla optimalna učinkovitost. Odabir je vezan za klasično 3D modeliranje ili 3D skeniranje pomoću specijaliziranih programskih i sklopovskih rješenja. 3D tehnikama modeliranja korisnik može izraditi 3D model na nekoliko načina: koristi poligone, krivulje ili hibrid dviju spomenutih tehnika pod nazivom subdivizijsko modeli...

3D print of polymer bonded rare-earth magnets, and 3D magnetic field scanning with an end-user 3D printer

Science.gov (United States)

Huber, C.; Abert, C.; Bruckner, F.; Groenefeld, M.; Muthsam, O.; Schuschnigg, S.; Sirak, K.; Thanhoffer, R.; Teliban, I.; Vogler, C.; Windl, R.; Suess, D.

2016-10-01

3D print is a recently developed technique, for single-unit production, and for structures that have been impossible to build previously. The current work presents a method to 3D print polymer bonded isotropic hard magnets with a low-cost, end-user 3D printer. Commercially available isotropic NdFeB powder inside a PA11 matrix is characterized, and prepared for the printing process. An example of a printed magnet with a complex shape that was designed to generate a specific stray field is presented, and compared with finite element simulation solving the macroscopic Maxwell equations. For magnetic characterization, and comparing 3D printed structures with injection molded parts, hysteresis measurements are performed. To measure the stray field outside the magnet, the printer is upgraded to a 3D magnetic flux density measurement system. To skip an elaborate adjusting of the sensor, a simulation is used to calibrate the angles, sensitivity, and the offset of the sensor. With this setup, a measurement resolution of 0.05 mm along the z-axes is achievable. The effectiveness of our calibration method is shown. With our setup, we are able to print polymer bonded magnetic systems with the freedom of having a specific complex shape with locally tailored magnetic properties. The 3D scanning setup is easy to mount, and with our calibration method we are able to get accurate measuring results of the stray field.

Using 3D in Visualization

DEFF Research Database (Denmark)

Wood, Jo; Kirschenbauer, Sabine; Döllner, Jürgen

2005-01-01

to display 3D imagery. The extra cartographic degree of freedom offered by using 3D is explored and offered as a motivation for employing 3D in visualization. The use of VR and the construction of virtual environments exploit navigational and behavioral realism, but become most usefil when combined...... with abstracted representations embedded in a 3D space. The interactions between development of geovisualization, the technology used to implement it and the theory surrounding cartographic representation are explored. The dominance of computing technologies, driven particularly by the gaming industry...

Whole-heart coronary MRA with 3D affine motion correction using 3D image-based navigation.

Science.gov (United States)

Henningsson, Markus; Prieto, Claudia; Chiribiri, Amedeo; Vaillant, Ghislain; Razavi, Reza; Botnar, René M

2014-01-01

Robust motion correction is necessary to minimize respiratory motion artefacts in coronary MR angiography (CMRA). The state-of-the-art method uses a 1D feet-head translational motion correction approach, and data acquisition is limited to a small window in the respiratory cycle, which prolongs the scan by a factor of 2-3. The purpose of this work was to implement 3D affine motion correction for Cartesian whole-heart CMRA using a 3D navigator (3D-NAV) to allow for data acquisition throughout the whole respiratory cycle. 3D affine transformations for different respiratory states (bins) were estimated by using 3D-NAV image acquisitions which were acquired during the startup profiles of a steady-state free precession sequence. The calculated 3D affine transformations were applied to the corresponding high-resolution Cartesian image acquisition which had been similarly binned, to correct for respiratory motion between bins. Quantitative and qualitative comparisons showed no statistical difference between images acquired with the proposed method and the reference method using a diaphragmatic navigator with a narrow gating window. We demonstrate that 3D-NAV and 3D affine correction can be used to acquire Cartesian whole-heart 3D coronary artery images with 100% scan efficiency with similar image quality as with the state-of-the-art gated and corrected method with approximately 50% scan efficiency. Copyright © 2013 Wiley Periodicals, Inc.