ISABEL ALVES DOS-SANTOS
Full Text Available Las abejas Cleptoparásitas depositan sus huevos en nidos construídos por otras especies de abejas y las larvas se alimentan del polen que proveen las hospederas, en este caso, abejas solitarias. El cleptoparásito (adulo y larva muestra muchas adaptaciones morfológicas y comportamentales para este estilo de vida. En este manuscrito presento datos sobre abejas cleptoparásitas cuyos hospederos son abejas especializadas en recolectar aceite floral.Cleptoparasite bees lay their eggs inside nests constructed by other bee species and the larvae feed on pollen provided by the host, in this case, solitary bees. The cleptoparasite (adult and larvae show many morphological and behavior adaptations to this life style. In this paper I present some data on the cleptoparasite bees whose hosts are bees specialized to collect floral oil.
Insuficiencia renal aguda asociada a picadura de abeja africanizada
Verny Huertas-Franco
2008-03-01
Full Text Available Se presenta el caso de un adulto mayor diabético tipo 2, que sufrió un ataque masivo de abejas africanizadas, y llegó a la sala de emergencias tres horas después del inicio del ataque. El paciente presentó insuficiencia renal aguda por combinación de factores, y se recuperó con tratamiento de diálisis temprana. Se discuten los problemas que refieren estos pacientes, y cuál sería el manejo ideal de tales casos.
MEMORIA Y APRENDIZAJE EN LA ESCOGENCIA FLORAL DE LAS ABEJAS
AMAYA MARISOL
2009-08-01
Full Text Available RESUMEN
Los polinizadores altamente especializados en su dieta, no hacen escogencias florales, ellos visitan un recurso específico siguiendo el dictado de la información almacenada en sus genes. En contraste, para la abeja social Apis mellifera una escogencia floral implica, la toma de una decisión, usualmente con criterio económico, basada en información aprendida y almacenada en alguna forma de memoria. Aunque existen numerosos estudios y modelos sobre la escogencia floral en abejas, la gran mayoría de éstos, han derivado sus conclusiones a partir de condiciones temporalmente fijas de la interacción. Muy pocos estudios han abordado la dinámica propia del contexto ecológico, en el cual el mercado floral de las abejas cambia con las estaciones del año y con los patrones diarios de antesis floral. Este cambio en la disponibilidad de especies florales enfrenta a los polinizadores, a realizar escogencias secuenciales acerca del alimento a explotar. En este trabajo abordo el tema del forrajeo secuencial en parches florales heterospecíficos, enfocándome en el uso que la abeja melífera hace de la información previamente aprendida en un contexto, cuando se enfrenta a la explotación de alimento en un contexto ecológicamente diferente. He realizado experimentos sobre escogencia floral simulando las condiciones de cambio del paisaje floral, exponiendo abejas individuales de A. mellifera a decidir sobre cuales especies forrajear en cada parche. Los resultados indican que la abeja invierte en procesos de aprendizaje en un muestreo inicial, pero una vez almacenada la información, utiliza una pieza de la información previamente aprendida (color para explotar parches florales heteroespecíficos siguiendo una imagen de búsqueda de color. En esta revisión discuto situaciones biológicas de la interacción planta-abeja, las cuales apoyan la idea que en la naturaleza el uso de imágenes de búsqueda de color por parte de abejas
Abejas silvestres (Hymenoptera: Apoidea) como bioindicadores en el neotrópico
Enrique Reyes-Novelo; Virginia Meléndez Ramírez; Hugo Delfín González; Ricardo Ayala
2009-01-01
Este trabajo es una revisión sobre el potencial de las abejas silvestres como grupo indicador en estudios de diversidad y fragmentación de hábitat. Se describen los criterios utilizados para seleccionar grupos de organismos como bioindicadores y se discute la información disponible para evaluar si las abejas pueden ser consideradas idóneas. La información disponible sugiere que las abejas silvestres cumplen con los criterios requeridos para considerarlas un grupo indicador y se recomienda su ...
POTENCIAL DE LAS ABEJAS NATIVAS EN LA POLINIZACIÓN DE CULTIVOS
QUEZADA-EUAN JOSE JAVIER
2009-08-01
Full Text Available
RESUMEN
En esta nota se discute sobre la polinización de cultivos como una actividad potencial del cultivo de abejas nativas.
Palabras clave: abejas nativas, polinación de cultivos
ABSTRACT
This note refers to the potential of native bees cultivation in crop polinization.
Key words: native bees, crop polinization
DAVID W ROUBIK
Full Text Available Pocos estudios han considerado la dinámica de poblaciones de abejas en bosques o hábitats no alterados por el hombre. La presencia de abejas silvestres Africanizadas de Apis mellifera (Apidae fue estudiado por 10-17 años en áreas previamente sin esta especie. Aquí presento e interpreto resultados de tres bosques neotropicales: Guyana Francesa, Panamá y Yucatán, México (5° a 19° N. latitud. La abeja Africanizada exótica no produjo efecto negativo en las abejas nativas, incluyendo especies altamente sociales y solitarias. Diferencias mayores a través del tiempo fueron encontradas en la abundancia de las abejas de miel en flores cerca de hábitat con mayor grado de disturbio, comparado con el bosque espeso. Al nivel poblacional, muestreado en bloques de nidos trampa, en flores o con trampas ultravioletas de insectos, no hubo disminución pronta de abejas, y sí hubo una población relativamente estable o sinusoidal. Sin embargo, las abejas nativas cambiaron su hora de buscar provisiones o su selección de especies florales. Una conclusión principal es que esta competencia por los recursos es ‘silenciosa';, en las áreas florísticamente ricas estudiadas, porque las mismas abejas compensan con su comportamiento. Otros factores rigen sus poblaciones.Very little effort has been made to investigate bee population dynamics among intact wilderness areas. The presence of newly-arrived feral Africanized honey bee (AHB, Apis mellifera (Apidae, populations was studied for 10-17 years in areas previously with few or no escaped European apiary honey bees. Here I describe and interpret the major results from studies in three neotropical forests: French Guiana, Panama and Yucatan, Mexico (5° to 19° N. latitude. The exotic Africanized honey bees did not produce a negative effect on native bees, including species that were solitary or highly eusocial. Major differences over time were found in honey bee abundance on flowers near habitat
GENÉTICA DEL COMPORTAMIENTO: ABEJAS, un ejemplo.
Nates Parra Guiomar
2011-12-01
Full Text Available El concepto de que el comportamiento de los animales esta determinado genéticamente no es nuevo si se considera que ya Darwin en su famosa obra El origen del hombre, en 1871 mencionaba que… “los rasgos del temperamento de los animales son heredados”. Pero solo hasta hace casi 50 años fue que la genética del comportamiento surgió como una especialidad importante dentro de la Genética; desde esa época muchos son los avances que refuerzan la idea generalmente aceptada de que todos los patrones comportamentales están determinados por componentes tanto ambientales como genotípicos. El análisis del control genético de un determinado comportamiento es complicado por el hecho de que las acciones primarias de un gene pueden afectar: 1. Los órganos sensoriales, cambiando la información recibida. 2. Sistemas intermedios (nervioso, endocrino, alterando capacidades de coordinación y percepción y 3. Órganos efectores, alterando la respuesta. Las mutaciones inducidas, que bloquean o alteran los patrones normales de comportamiento, proporcionan una herramienta muy útil para entender como los genes influencian la conducta (Hall et al, 1982. Al respecto hay muchos ejemplos, cuyo conocimiento ha servido para controlar o seleccionar caracteres indeseables o deseables (respectivamente, importantes para el mejoramiento en algunas especies animales. Por ejemplo, con la llegada de la abeja africanizada a América del Sur (Brasil,1958 (Kerr, 1967 llegaron también varios inconvenientes generados por el fuerte comportamiento defensivo de la nueva subespecie introducida (Apis mellifera scutellata , lo cual hizo que se iniciaran programas de investigación tendientes a conocer la biología y el comportamiento de la nueva especie introducida, de manera que se pudieran establecer cepas de abejas menos defensivas, conjuntamente con otras características como productividad o comportamiento higiénico. El establecimiento de las bases
Diversidad de las abejas nativas de la tribu Meliponini (Hymenoptera, Apidae) en Argentina
Alvarez, Leopoldo J.
2016-01-01
Las abejas (Hymenoptera: Apiformes) constituyen un grupo de insectos diverso y ampliamente distribuido que comprende alrededor de 18000 especies descriptas y representa uno de los grupos de insectos más importantes por su papel en la polinización de numerosas plantas con flores. En nuestro país están representadas cinco familias de abejas: Colletidae, Andrenidae, Halictidae, Megachilidae y Apidae. En esta última las tribus Apini, Meliponini, Bombini y Euglossini conforman un grupo monofilétic...
Fernandez Fernando
1992-11-01
Full Text Available Ilustrated keys for families, subfamilies and tribes of Colombian bees are presented. Achek list of genera is given.Se presentan claves ilustradas para las familias, subfamilias y tribus de abejas existentes en Colombia, así como comentarios generales acerca de cada familia. Igualmente se anexa un listado de los géneros registrados hasta el momento para Colombia.
Arechavaleta-Velasco, Miguel E.; Hunt, Greg J.; Marla Spivak; Carmen Camacho-Rea
2011-01-01
Este estudio se realizó para detectar loci de rasgos binarios (BTL) que influyen en la expresión del comportamiento higiénico de abejas obreras y para localizar marcadores genéticos asociados a estos BTL en un mapa de ligamiento. Se recolectaron abejas que realizaron el comportamiento higiénico y abejas que no realizaron el comportamiento higiénico de una colonia producto de una retrocruza. Se construyó un mapa genético utilizando marcadores AFLP generados a partir del ADN de las abejas que r...
DIVERSIDAD DE ABEJAS SIN AGUIJÓN (HYMENOPTERA:MELIPONINI UTILIZADAS EN MELIPONICULTURA EN COLOMBIA
Guiomar Nates Parra
2013-07-01
Full Text Available En Colombia se conoce la existencia de cerca de 120 especies de abejas nativas sin aguijón, muchas de las cuales tienen importantes usos y representaciones para diversos grupos sociales y culturales. A pesar de que su cría y manejo (meliponicultura, es una actividad que viene creciendo y tecnificándose en Latinoamérica y otras regiones del mundo, sus características y desarrollo en Colombia han sido poco documentados. Se presentan los resultados de entrevistas y visitas a 75 personas en 16 departamentos de Colombia, que cultivan 25 especies de abejas sin aguijón, agrupadas en 12 géneros. Se encontraron al menos nueve especies más sin identificación completa, se reportan cuatro nuevos registros para el país y se amplía la distribución para 21 taxones. Se presenta información sobre la distribución regional y altitudinal, el cultivo urbano y las denominaciones locales para las abejas. Se revisan algunas características de los géneros cultivados más comunes (Tetragonisca, Melipona, Paratrigona, Scaptotrigona, y Nannotrigona y se discute la importancia del vínculo entre diversidad biológica y cultural que se manifiesta en los nombres locales reportados. Ante un escenario mundial de expansión de la meliponicultura, se resaltan necesidades de investigación y riesgos para la conservación y manejo de la diversidad de abejas sin aguijón y los conocimientos asociados.
Veneno de abeja: Vigilancia tecnológica mediante el estudio de las citas de patentes
Beatriz García Delgado
2008-01-01
Full Text Available Los productos apícolas, particularmente el veneno de abeja, se encuentran entre los productos que poseen importantes propiedades farmacológicas y que en la actualmente su uso se diversifica, de aquí, la necesidad de realizar de forma sistemática estudios de vigilancia tecnológica relacionadas con este tema. En este trabajo, se realiza un estudio a partir de las 28 patentes que reivindican el "veneno de abeja" (concedidas por la Oficina de Patentes y Marcas de Estados Unidos y las citas correspondientes a estas invenciones. Esta información fue procesada con un sistema automatizado desarrollado para el procesamiento de patentes y sus citaciones, el cual genera un fichero que contiene la información procesada y que posibilita su posterior visualización en forma de red, mediante la utilización del sistema NetDraw, lo que permite, de forma eficaz y con inmediatez, identificar aquellas agrupaciones de interés que están relacionadas directamente con el veneno de abeja. Se determinó que existe una tendencia positiva en el desarrollo tecnológico relacionado con equipos y métodos para la recolección del veneno de abeja, y se comprobó que se continúan patentando procesos y productos relacionados fundamentalmente con el aislamiento, purificación y preparación de proteínas, anticuerpos y juegos de reactivos de diagnóstico que se emplean en la identificación y tratamiento de enfermedades inmunológicas.
Nates-Parra, Guiomar; Rodríguez-C., Ángela; E. DANNY VÉLEZ
2011-01-01
Se encontraron 203 nidos de abejas sin aguijón pertenecientes a 15 especies en 11 cementerios de los departamentos de Cundinamarca y Meta (Colombia). El 61% de los nidos encontrados pertenecen a abejas del género Nannotrigona Cokerell, 1922. La especie con el mayor número de nidos y mayor representatividad en los cementerios estudiados fue Nannotrigona mellaria; Trigona (Tetragonisca) angustula se encontró en todos los cementerios estudiados pero, en un porcentaje menor que N. mellaria (29% d...
Nueva especie de abeja del género Osmia (Hymenoptera: Megachilidae) de México
Ricardo Ayala; Terry Griswold
2005-01-01
Se describe e ilustra una especie nueva de abeja Osmia aliciae endémica del eje volcánico transversal, en la parte central de México. La especie se caracteriza por su integumento azul obscuro y el metasoma con bandas apicales de pubescencia densa sobre los tergos 25, y la hembra por el clípeo y área frontal con pubescencia con las puntas crispadas. Esta nueva especie has sido registrada en los estados de Morelos, M éxico, Michoacán y Jalisco.
Diversidad de abejas sin aguijón (hymenoptera:meliponini) utilizadas en meliponicultura en colombia
Guiomar Nates Parra; Juan Manuel Rosso Londoño
2013-01-01
En Colombia se conoce la existencia de cerca de 120 especies de abejas nativas sin aguijón, muchas de las cuales tienen importantes usos y representaciones para diversos grupos sociales y culturales. A pesar de que su cría y manejo (meliponicultura), es una actividad que viene creciendo y tecnificándose en Latinoamérica y otras regiones del mundo, sus características y desarrollo en Colombia han sido poco documentados. Se presentan los resultados de entrevistas y visitas a 75 personas en 16 d...
ABEJAS VISITANTES DE Mimosa pigra L. (MIMOSACEAE:COMPORTAMIENTO DE PECOREO Y CARGAS POLÍNICAS
AGUILAR SIERRA CLARA ISABEL
2009-04-01
Full Text Available
RESUMEN
Se estudiaron las cargas polínicas de 13 taxones de abejas capturadas visitando a Mimosa pigra en la zona de influencia del Embalse Porce II (Antioquia, Colombia. De los 21 tipos polínicos encontrados, M. pigra presenta el mayor porcentaje acumulado de colecta; Mimosa pudica, Piper aduncum, Solanum diversifolium, Warszewiczia coccinea y Psidium guajava, en su orden, se pueden considerar fuentes alternativas de polen, para varias de las especies de abejas cuyas cargas polínicas fueron analizadas. Dentro de las especies de abejas capturadas visitando a M. pigra se pueden diferenciar varios grupos según el tipo y abundancia relativa de los tipos polínicos encontrados en sus cargas. Uno de ellos, incluye a siete especies de abejas con más del 85% de granos de polen de M. pigra; otro, con cuatro especies de abejas que colectaron más del 94,5% del polen en M. pigra y M. pudica. Adicionalmente, se encontraron especies como Trigona dorsalis con cargas de M. pigra (59,4%, de S. diversifolium (37,8% y especies de abejas como Lasioglossum sp. 113, en cuyas cargas polínicas predominan los granos de polen de P. aduncum (61,8% y de W.coccinea (36,4%, en contraste con los de M. pigra (1,3%. En cuanto a la riqueza de tipos polínicos colectados por las abejas sobresalen Trigona muzoensis (12 tipos polínicos y T. dorsalis (10 tipos, lo cual refleja nichos tróficos más amplios para estas especies y deja duda sobre su constancia floral o hábitos de limpieza.
Las abejas de Porce familia colletidae (hymenoptera: apoidea notas y claves para los géneros presentes en la zona de influencia del embalse Porce ii.
Smith Pardo Allan H.
1999-12-01
Full Text Available Se presentan claves taxonómicas a nivel de género para la identificación de las abejas colletidas de la zona de Influencia del Embalse Porce II (Porce, Antioquía, Colombia S.A. Adicionalmente se presentan algunas notas para los géneros de colletidos capturados durante el inventario de las abejas silvestres de la zona.
GENÉTICA DEL COMPORTAMIENTO:: ABEJAS COMO MODELO Behavior Genetics:: Bees as Model
GUIOMAR NATES-PARRA
Full Text Available La abeja de miel (género Apis, Familia Apidae es uno de los organismos utilizados en estudios de comportamiento, debido a su forma de vida social, la cual requiere de coordinación entre todos los individuos de la comunidad. La división de trabajo dentro de una colonia de abejas es consecuencia de cambios fisiológicos relacionados con la edad de las obreras y con la variación genética entre ellas que hace que realicen diferentes tareas. Con los progresos en biología molecular, genómica y secuenciación del genoma de Apis mellifera, han surgido nuevas herramientas que permiten desentrañar las bases moleculares del comportamiento, en particular el comportamiento social. Numerosos estudios han mostrado que muchas de las conductas realizadas por las obreras están determinadas genéticamente (comportamiento defensivo, comportamiento higiénico y además que hay variación genética entre poblaciones en el desempeño de tareas como recolección de agua, néctar y polen. Igualmente algunos aspectos del comportamiento social, como el control de la reproducción en las castas estériles, también están bajo influjo genético. En este trabajo se hace una revisión de las metodologías utilizadas para estudiar la genética del comportamiento, así como la base genética de algunas de las conductas más sobresalientes de abejas.The honeybee Apis mellifera (Apidae is a model widely used in behavior because of its elaborate social life requiring coordinate actions among the members of the society. Within a colony, division of labor, the performance of tasks by different individuals, follows genetically determined physiological changes that go along with aging. Modern advances in tools of molecular biology and genomics, as well as the sequentiation of A. mellifera genome, have enabled a better understanding of honeybee behaviour, in particular social behaviour. Numerous studies show that aspects of worker behaviour are genetically determined
Evaluación ecotoxicológica de dos derivados del Nim en lombriz de tierra y abejas
A Mancebo Rodríguez
2011-01-01
Full Text Available La utilización de productos con bajo o nulo impacto en organismos circundantes y el ambiente, constituye parte del nuevo concepto de protección de cultivos. Los productos NeoNim 60 y OleoNim 80, obtenidos del árbol del Nim, están propuestos para su uso como insecticida, nematicida y acaricida. Con el objetivo de realizar la evaluación ecotoxicológica de estos productos, se realizaron los ensayos de toxicidad aguda en lombriz de tierra Eisenia andrei y de toxicidad aguda por contacto en abejas Apis mellifera. Cada ensayo contó con un grupo control y dos tratados. El ensayo en lombrices se realizó durante 14 días utilizando suelo artificial, realizando observaciones clínicas, conteo de animales y estudio del comportamiento de la biomasa. La prueba en abejas se prolongó por 48 horas, realizándose observaciones clínicas y conteo de animales. Se obtuvo un 100% de supervivencia en las lombrices de los grupos tratados, obteniendo en el NeoNim 60 valores de disminución de la biomasa significativamente inferiores al grupo control, mientras que el grupo tratado con OleoNim 80 mostró aumento en la biomasa del inicio al final del ensayo. En el ensayo en abejas, la comparación estadística no mostró diferencias entre grupos en cuanto a la mortalidad. Teniendo en cuenta el conjunto de los resultados obtenidos, se pudo concluir que los derivados del Nim NeoNim 60 y OleoNim 80 no producen efecto tóxico sobre las lombrices de tierra y las abejas.
GUIOMAR NATES-PARRA; ÁNGELA RODRÍGUEZ-C; E. DANNY VÉLEZ
2006-01-01
Se encontraron 203 nidos de abejas sin aguijón pertenecientes a 15 especies en 11 cementerios de los departamentos de Cundinamarca y Meta (Colombia). El 61% de los nidos encontrados pertenecen a abejas del género Nannotrigona Cokerell, 1922. La especie con el mayor número de nidos y mayor representatividad en los cementerios estudiados fue Nannotrigona mellaria; Trigona (Tetragonisca) angustula se encontró en todos los cementerios estudiados pero, en un porcentaje menor que N. mellaria (29% d...
Lucía, Mariano
2011-01-01
Las abejas constituyen un grupo de insectos ampliamente distribuidos que comprende aproximadamente 20000 especies descriptas alrededor del mundo. Son considerados los polinizadores más importantes de las Angioespermas y comprenden el grupo más diverso de los visitantes florales, de allí su importancia en los ecosistemas, tanto naturales como agrícolas. De las siete familias de abejas reconocidas en el mundo, sólo cinco se encuentran representadas en nuestro país. La familia Apidae es la má...
Evaluación ecotoxicológica del FitoMas-H en lombriz de tierra y abejas
Axel Mancebo
2008-01-01
Full Text Available Aunque constituye una necesidad el aumento de las producciones agrícolas, y actualmente se estimula la disminución del uso de productos químicos, mediante su sustitución por fertilizantes orgánicos y biológicos, es preciso evaluar el impacto de éstos sobre las especies del ecosistema en el cual se liberan. Con el objetivo de realizar la evaluación ecotoxicológica en sistemas terrestres del FitoMas-H, se realizaron los ensayos de toxicidad aguda en lombriz de tierra (Eisenia foetida y de toxicidad aguda por contacto en abejas (Apis mellifera. Se evaluó una concentración de 1000 mg de FitoMas-H /Kg de suelo artificial en el primer caso, mientras en el ensayo con abejas se utilizó una dosis de 100 g de FitoMas - H/animal. El ensayo en lombrices culminó con un 97,5 % de supervivencia en el grupo Tratado, sin diferencias significativas en la mortalidad y la variación de biomasa del grupo Control contra el Tratado. Por otra parte, el estudio por contacto en abejas terminó con una supervivencia del 95.45%, sin diferencias entre la mortalidad del grupo Control contra el Tratado. En ambos casos, se pudo concluir que la exposición al FitoMas-H no produce efectos tóxicos en los invertebrados terrestres utilizados.
VÍCTOR H GONZÁLEZ
Full Text Available Se registran por primera vez para Colombia los géneros de abejas solitarias Lophothygater Moure y Michener (Apidae, Eucerini y Tapinotaspoides Moure (Apidae, Tapinotaspidini. Estos géneros solo se conocían del centro de la Amazonía brasileña, Argentina y Paraguay, respectivamente.The solitary bee genera Lophothygater Moure y Michener (Apidae, Eucerini and Tapinotaspoides Moure (Apidae, Tapinotaspidini are reported from northern Colombia for the first time. These genera were previously known from the central Brazilian Amazonian and Argentina and Paraguay, respectively.
Evaluación ecotoxicológica de dos derivados del Nim en lombriz de tierra y abejas
A Mancebo Rodríguez; J Estrada Ortiz; C González Triana; Y González Torres; B González Navarro; AM Bada Barro
2011-01-01
La utilización de productos con bajo o nulo impacto en organismos circundantes y el ambiente, constituye parte del nuevo concepto de protección de cultivos. Los productos NeoNim 60 y OleoNim 80, obtenidos del árbol del Nim, están propuestos para su uso como insecticida, nematicida y acaricida. Con el objetivo de realizar la evaluación ecotoxicológica de estos productos, se realizaron los ensayos de toxicidad aguda en lombriz de tierra Eisenia andrei y de toxicidad aguda por contacto en abejas...
Biogeografía de las abejas de las orquídeas (Hymenoptera: Apidae: Euglossini en Colombia
Parra-H. Alejandro
2007-12-01
Full Text Available Las abejas de las orquídeas, propias de la región neotropical, parecen haber aparecido recientemente entre el piedemonte de la cordillera de los Andes y la Amazonía. Además éstas abejas de lengua larga y vuelos amplios
llaman la atención por sus características biológicas, fisiológicas, ecológicas y comportamentales que comparadas con el resto de las tribus más cercanas a ellas (las abejas corbiculadas: Meliponini, Bombini y Apini
presentan diferencias importantes. Debido a esto y a que son importantes polinizadores, es de especial interés
establecer sus patrones de distribución, particularmente en Colombia, debido a las características geográficas
del país. Con base en el material de euglosinos depositados en la colección del LABUN, referencias bibliográficas, características morfológicas y comporamentales de la tribu, así como la localización geográfica y altitudinal de las especies, se desarrolló un análisis de correspondencia para determinar cómo las diferentes variables podrían estar implicadas en la distribución de los euglosinos en Colombia. Los resultados del análisis multivariado muestran que no hay una estrecha relación de las especies de euglosinos a las regiones naturales que ocupan, sino que dentro de las variables consideradas, el tamaño corporal (implicado en capacidad de vuelo y la termorregulación, la estructura social (asociada a aprovechamiento y optimización de recursos en el hábitat y la longitud de la lengua (relacionada con la preferencia y toma de néctares, generan la mayor variabilidad de la muestra. De acuerdo a las características morfológicas y comportamentales analizadas se propone un patrón biogeográfico para la distribución de las abejas euglosinas en Colombia.
Micoflora asociada a granos de polen recolectados por abejas domésticas (Apis mellifera L
Carlos Manuel Bucio Villalobos
2010-01-01
Full Text Available Introducción: El polen cosechado de las explotaciones apícolas puede verse colonizado con hongos potencialmente toxigénicos durante su producción o almacenamiento, cuyas toxinas pueden tener consecuencias graves sobre la salud de las personas que lo consuman. El objetivo del presente trabajo fue cuantificar el grado de contaminación con hongos en 19 muestras de polen recolectado por las abejas, obtenidas en la ciudad de León, Gto. Método: 19 muestras de polen en diferentes presentaciones comerciales fueron obtenidas en tiendas naturistas de León, Gto., y fueron procesadas por triplicado colocando 100 gránulos sobre el medio de cultivo Papa Dextrosa Agar, e incubados por siete días a 25 °C. Al final del período de incubación se cuantificó el número de gránulos colonizados por los diferentes hongos. Resultados y Discusión: Los resultados mostraron que las tres muestras con mayor contaminación de hongos (98, 100 y 100 % fueron manejadas a granel, resultado similar al obtenido en un estudio previo realizado en 2007 con muestras recolectadas en la ciudad de Irapuato, Gto. Por otro lado, la contaminación de las muestras empacadas en envases de plástico duro (con y sin sellos en sus tapas tendieron a ser bajas, en contraste con lo encontrado en el estudio previo ya citado, donde hubo muestras envasadas de esa forma con más del 90 % de contaminación, lo que indica que el grado de contaminación no es consecuencia solamente de la forma de envasar el polen. La incidencia de los hongos encontrados fue en general baja: Aspergillus (3.6 %, Alternaria (3.6 %, Mucor (3.1 %, Fusarium (2.9 %, Penicillium (2.9 % y Rhizopus (0.7 %, habiéndose encontrado dentro del género Aspergillus la especie A. flavus, la cual puede incluir cepas capaces de producir aflatoxinas. Esta especie fue detectada en 4 de las 19 muestras analizadas, con incidencias de 27, 14, 10 y 1 %, las cuales fueron más altas que las encontradas en el estudio previo hecho en
MARISOL AMAYA MÁRQUEZ
Full Text Available Los polinizadores altamente especializados en su dieta, no hacen escogencias florales, ellos visitan un recurso específico siguiendo el dictado de la información almacenada en sus genes. En contraste, para la abeja social Apis mellifera una escogencia floral implica, la toma de una decisión, usualmente con criterio económico, basada en información aprendida y almacenada en alguna forma de memoria. Aunque existen numerosos estudios y modelos sobre la escogencia floral en abejas, la gran mayoría de éstos, han derivado sus conclusiones a partir de condiciones temporalmente fijas de la interacción. Muy pocos estudios han abordado la dinámica propia del contexto ecológico, en el cual el mercado floral de las abejas cambia con las estaciones del año y con los patrones diarios de antesis floral. Este cambio en la disponibilidad de especies florales enfrenta a los polinizadores, a realizar escogencias secuenciales acerca del alimento a explotar. En este trabajo abordo el tema del forrajeo secuencial en parches florales heterospecíficos, enfocándome en el uso que la abeja melífera hace de la información previamente aprendida en un contexto, cuando se enfrenta a la explotación de alimento en un contexto ecológicamente diferente. He realizado experimentos sobre escogencia floral simulando las condiciones de cambio del paisaje floral, exponiendo abejas individuales de A. mellifera a decidir sobre cuales especies forrajear en cada parche. Los resultados indican que la abeja invierte en procesos de aprendizaje en un muestreo inicial, pero una vez almacenada la información, utiliza una pieza de la información previamente aprendida (color para explotar parches florales heteroespecíficos siguiendo una imagen de búsqueda de color. En esta revisión discuto situaciones biológicas de la interacción planta-abeja, las cuales apoyan la idea que en la naturaleza el uso de imágenes de búsqueda de color por parte de abejas sociales puede ser m
Vossler, Favio Gerardo
2013-01-01
El presente estudio tuvo como objetivo abordar la interacción entre las plantas proveedoras de recursos florales y tres especies de abejas nativas de la tribu Meliponini a través del estudio palinológico de la miel y masas polínicas almacenadas en los nidos. Las especies de abejas seleccionadas fueron Tetragonisca fiebrigi, Melipona orbignyi y Geotrigona argentina. Para llevar a cabo este estudio, se tomaron muestras de reservas alimentarias (miel y masas de polen) de nidos provenientes d...
Guillermo Pablo Salinas
2011-12-01
Full Text Available Como resultado de una investigación impulsada por la justicia, se analizaron muestras provenientes de un posible derrame intencional de plaguicidas sobre colmenas con abejas. En los análisis realizados se utilizó GC-MS previa extracción con solventes orgánicos. Debido a dificultades iniciales en la identificación de plaguicidas sobre tres de las muestras, se procedió al reprocesamiento de los cromatogramas utilizando selección de las relaciones de masas m/z 158, 173 y 143. Utilizando es herramienta analítica se obtuvieron los correspondientes cromatogramas, y los espectros de masas con coincidencia frente al divulgado para el producto de descomposición de bromadiolona (PDB, determinando que tanto las abejas como las colmenas habían tenido contacto con bromadiolona (3-[3-(4'-bromobifenil-4-il- 3-hidroxi-1-fenilpropil]-4- hidroxicumarina, un anticoagulante cumarínico de utilización agraria para combatir roedores, que parece ser prácticamente no tóxico para las abejas según informes internacionales. Se observó que en la literatura no se halla propuesta una estructura química definida para el PDB, lo cual podría constituir el fundamento para encarar trabajos futuros con el fin de elucidar el comportamiento de la droga madre en el contexto del caso.As a result of an investigation boosted by ordinary justice, samples from a probable deliberate spill of pesticide over bees and hives were analyzed. Solvent extractions and then GC-MS were used to perform the tests. Due to difficulties since the beginning in pesticide identification upon three samples, chromatograms were reprocessed using mass selection at m/z 158, 173 y 143 mass rates. The correspondent chromatograms were gathered by these analytical tool, and their mass spectrums were found coincident with the previously reported as bromadiolone decomposition product (BDP, showing that hives as well as bees had been in contact with bromadiolone (3-[3-(4'-bromobiphenyl-4-yl- 3-hydroxy
Verny Huertas-Franco
2008-03-01
Full Text Available Se presenta el caso de un adulto mayor diabético tipo 2, que sufrió un ataque masivo de abejas africanizadas, y llegó a la sala de emergencias tres horas después del inicio del ataque. El paciente presentó insuficiencia renal aguda por combinación de factores, y se recuperó con tratamiento de diálisis temprana. Se discuten los problemas que refieren estos pacientes, y cuál sería el manejo ideal de tales casos.This is the case of an elderly patient who suffered multiple Africanized bee stings. He developed acute renal failure as a complication. He however recovered completely after treatment with peritoneal dialysis and hemodialysis.
La difusión de la teoría evolucionista de Lamarck en la revista La Abeja
Camós Cabeceran, Agustí
1997-01-01
La obra de Lamarck fue difundida, entre los años 1862 y 1865, por la revista La Abeja dirigida por Antoni Bergnes de las Casas y publicada en Barcelona. En dicha revista aparece explicada la teoría evolucionista de Lamarck tanto en la traducción de su obra. Histoire naturelle des végétaux, como en una serie de artículos anónimos sobre la reproducción de los seres vivos. Estos datos pueden revelar que, en la introducción del evolucionismo en España, la teoría evolucionista de Lamarck tuvo mayo...
ALLAN SMITH PARDO
2007-06-01
Full Text Available Los objetivos principales de este trabajo fueron entender cómo la diversidad de abejas cambia durante la sucesión en un bosque húmedo neotropical, y comparar la eficiencia de los cuatro métodos de captura usados. La diversidad y riqueza de abejas fueron estudiadas al nororiente de Medellín (Antioquia, Colombia; 9001.100 m durante seis meses en cuatro estados sucesionales (pastizal, rastrojo bajo, rastrojo alto y bosque. Las abejas fueron intensiva y sistemáticamente capturadas usando los siguientes métodos: red entomológica, Malaise, metil salicilato para abejas euglosinas (Apidae, Euglossini y trampa Van Somer con pescado de agua dulce en descomposición. En total se capturaron 15.356 especímenes pertenecientes a cuatro familias y 287 especies de abejas. Esto corresponde al 62% del número total de especies de abejas conocidas para Colombia. Aproximadamente el 50% de todos los individuos fueron abejas sociales sin aguijón (Apidae, Meliponini. Trigona (Trigona fulviventris fue la especie más abundante (~10% en todo el muestreo. Augochlora y Megachile fueron los géneros con mayor número de especies. El pastizal y rastrojo alto presentaron los mayores índices de diversidad y riqueza de abejas y fueron significativamente más altos que los del bosque y rastrojo bajo. En todos los estados sucesionales, excepto por el bosque, el número de especies nuevas por muestra tendió a cero, y las curvas de acumulación de especies tendieron a normalizarse con el tiempo y aumento en el área de muestreo. La red entomológica fue el método más eficiente en todos los estados sucesionales, excepto en el bosque, donde el mayor número de especies e individuos fueron capturados con la trampa Van Somer. Sin embargo, en todos los estados sucesionales un mayor porcentaje (50% de especies raras fueron colectadas con Malaise. El número de especies nuevas colectadas en cada muestra y las curvas de acumulación de especies sugieren que el muestreo fue
Variaciones hematológicas y de presión sanguínea en perros después de una picadura de abejas
Jorge Muñoz G.; Verónica Arnes V.; Marcelo Mieres L.; Mirela Noro
2015-01-01
RESUMENObjetivo. El objetivo de este estudio fue determinar los cambios hematológicos y de presión arterial en perros después de una picadura cutánea de abejas. Material y métodos. Se utilizaron 10 perros adultos, a los cuales se les inoculó veneno de abeja mediante una picadura cutánea controlada. De cada animal se extrajo una muestra de sangre previa y los 15 y 300 minutos post inoculación. Se registró la presión arterial sistólica (PAS), diastólica (PAD), media (PAM) y de pulso (PP) desde ...
A. Valido
2014-01-01
Full Text Available En el Parque Nacional del Teide (Tenerife, Islas Canarias se autoriza, cada primavera, la introducción de unas 3000 colmenas de abeja doméstica (Apis mellifera, Apidae. Esto implica que unos 100 millones de abejas melíferas compiten por néctar y polen con la fauna polinizadora nativa (insectos, aves y lagartos de este ecosistema peculiar de alta montaña. Si tenemos en cuenta que A. mellifera es considerada como un polinizador poco eficaz, la masiva presencia de abejas domésticas puede además incidir negativamente tanto en la producción de frutos y semillas como en la viabilidad de las semillas y el vigor de las plántulas. El objetivo de este artículo es señalar las consecuencias ecológicas de la introducción de A. mellifera en la red de interacciones mutualistas en esta área protegida (con un elevado porcentaje de especies endémicas, además de revisar el impacto de la abeja doméstica sobre la flora y fauna nativa en otros sistemas insulares. Los resultados obtenidos muestran que la diversidad de polinizadores disminuye sustancialmente tras la introducción de A. mellifera. Además, se detecta una reducción significativa en la eficacia reproductiva de aquellas plantas (Echium wildpretii, Spartocytisus supranubius frecuentemente visitadas por A. mellifera. Por todo ello, y en base a los resultados obtenidos, se recomienda eliminar completamente la presencia de colmenas en el interior del Parque Nacional del Teide con el fin de proteger su flora y fauna endémica.
Variaciones hematológicas y de presión sanguínea en perros después de una picadura de abejas
Jorge Muñoz G.
2013-03-01
Full Text Available Objetivo. El objetivo de este estudio fue determinar los cambios hematológicos y de presión arterial en perros después de una picadura cutánea de abejas. Material y métodos. Se utilizaron 10 perros adultos, a los cuales se les inoculó veneno de abeja mediante una picadura cutánea controlada. De cada animal se extrajo una muestra de sangre previa y los 15 y 300 minutos post inoculación. Se registró la presión arterial sistólica (PAS, diastólica (PAD, media (PAM y de pulso (PP desde 15 minutos previos hasta 45 minutos posteriores a la inoculación. Resultados. El recuento de eritrocitos, el hematocrito y la concentración de hemoglobina se redujeron a los 15 minutos post-inoculación (p0.05. Conclusiones. La picadura cutánea de abejas produce un descenso transitorio del recuento de eritrocitos, hematocrito y concentración de hemoglobina, junto con una disminución en el recuento de reticulocitos y del recuento relativo de eosinófilos, sin alterar mayormente la presión sanguínea.
CLARA ISABEL AGUILAR SIERRA
Full Text Available Se estudiaron las cargas polínicas de 13 taxones de abejas capturadas visitando a Mimosa pigra en la zona de influencia del Embalse Porce II (Antioquia, Colombia. De los 21 tipos polínicos encontrados, M. pigra presenta el mayor porcentaje acumulado de colecta; Mimosa pudica, Piper aduncum, Solanum diversifolium, Warszewiczia coccinea y Psidium guajava, en su orden, se pueden considerar fuentes alternativas de polen, para varias de las especies de abejas cuyas cargas polínicas fueron analizadas. Dentro de las especies de abejas capturadas visitando a M. pigra se pueden diferenciar varios grupos según el tipo y abundancia relativa de los tipos polínicos encontrados en sus cargas. Uno de ellos, incluye a siete especies de abejas con más del 85% de granos de polen de M. pigra; otro, con cuatro especies de abejas que colectaron más del 94,5% del polen en M. pigra y M. pudica. Adicionalmente, se encontraron especies como Trigona dorsalis con cargas de M. pigra (59,4%, de S. diversifolium (37,8% y especies de abejas como Lasioglossum sp. 113, en cuyas cargas polínicas predominan los granos de polen de P. aduncum (61,8% y de W.coccinea (36,4%, en contraste con los de M. pigra (1,3%. En cuanto a la riqueza de tipos polínicos colectados por las abejas sobresalen Trigona muzoensis (12 tipos polínicos y T. dorsalis (10 tipos, lo cual refleja nichos tróficos más amplios para estas especies y deja duda sobre su constancia floral o hábitos de limpieza.We studied the pollen loads of 13 taxa of wild bees visiting the flowers of Mimosa pigra on the influence zone of the Dam Project Porce II (Antioquia, Colombia. Out of 21 different pollen types, M. pigra represents the higuest percentage; Mimosa pudica, Piper aduncum, Solanum diversifolium, Warszewiczia coccinea and Psidium guajava, in that order, were also abundant, and are alternative sources of pollen for the different kinds of bees recorded. Among the species of bees collected, we differentiate
Aspectos toxinológicos y biomédicos del veneno de las abejas Apis mellifera
Rafael Valderrama Hernández
2003-03-01
Full Text Available Bee venom includes organic components of low and high molecular weight such as simple peptides like apamin, polypeptides like mellitin and enzymes like phospholipase A2 and hyaluronidase. It was recently demonstrated that some citrates are also important components of this venom. Mellitin and phospholipase A2 are the main and more abundant components, around 75%, in a ratio of 3:1; mellitin interacts with human red blood cells membranes producing hemolysis; and phospholipase A2, the main allergen of the venom, may act as blocking agent causing respiratory paralysis. Apamin represents about 2% of the total venom; it is less toxic than the aforementioned substances and acts as a motor neurotoxin; it is also responsible for triggering a cardiostimulant effect similar to that of adrenergic drugs; it has antiarrhythmic properties as well. Peptide MCD (Mast Cell Degranulation factor constitutes 2% of the venom, and it is one of the components responsible for histamine and serotonin release. Additionally, other components have been identified such as acid phosphatase, norepinephrine, dopamine and histamine. This review discusses aspects of the conformation and function of the bee stinging apparatus, of venom composition and action and ofs the behavior and habits of these insects. Finally, handling and treatment of bees bites are discussed. Applied aspects of the European and Africanized bees are compared. El veneno de abejas incluye compuestos orgánicos de bajo y alto peso molecular. Se encuentran en él péptidos simples como la apamina, polipéptidos como la melitina y enzimas como la fosfolipasa A2 y la hialuronidasa; recientemente se demostró que algunos citratos son también componentes mayores del veneno. La melitina y la fosfolipasa A2 son los componentes principales y más abundantes, cerca del 75%, en una relación 3:1. La melitina se adhiere a las membranas de los glóbulos rojos, produciendo hemólisis; la fosfolipasa A2, el mayor de los
Patricia Vit
2009-01-01
Las mieles producidas por abejas sin aguijón (Meliponini) tienen una composición diferente a las mieles de Apis me - llifera; sin embargo, no se han incorporado sus estándares en las normas de calidad para este producto de la colmena. En el presente trabajo se estudiaron mieles producidas en Venezuela por seis especies de abejas sin aguijón: Frieseomelitta paupera (Provancher, 1888), Scaura aff. latitarsis (Friese, 1900), Tetragonisca angustula (Latreille, 1811), Plebeia sp., Scaptotrigona sp...
GUIOMAR NATES-PARRA
2006-06-01
Full Text Available Se encontraron 203 nidos de abejas sin aguijón pertenecientes a 15 especies en 11 cementerios de los departamentos de Cundinamarca y Meta (Colombia. El 61% de los nidos encontrados pertenecen a abejas del género Nannotrigona Cokerell, 1922. La especie con el mayor número de nidos y mayor representatividad en los cementerios estudiados fue Nannotrigona mellaria; Trigona (Tetragonisca angustula se encontró en todos los cementerios estudiados pero, en un porcentaje menor que N. mellaria (29% del total. La densidad máxima encontrada fue de 118 nidos/ha, con un porcentaje de ocupación de las tumbas de 13,9% en el cementerio de Tena (Cundinamarca. Se discute sobre la importancia de los cementerios como alternativa para conservación de los sitios de nidificación para abejas silvestres en áreas urbanas.In 11 cemeteries of Cundinamarca and Meta (Colombia departments we found 203 nests of stingless bees pertaining to 15 species. The majority of the found nests (61% belong to genus Nannotrigona Cokerell, 1922. Nannotrigona mellaria was the species with the greater nests number and higher population; Trigona (Tetragonisca angustula was found in all cemeteries, but in a smaller percentage that N. mellaria (29% of the total. In the Tena (Cundinamarca cemetery was found the nest highest density (118 nest/ha, with a tombs occupation percentage of 13.9%. We discussed the importance of cemeteries as an alternative for wild bees nesting sites conservation in urban areas.
Danny Vélez E.
2006-06-01
Full Text Available In 11 cemeteries of Cundinamarca and Meta (Colombia departments we found 203 nests of stingless bees pertaining to 15 species. The majority of the found nests (61% belong to genus Nannotrigona Cokerell, 1922. Nannotrigona mellaria was the specie with the greater nests number and higher population; Trigona (Tetragonisca angustula was found in all cemeteries, but in a smaller percentage that N. mellaria (29% of the total. In the Tena (Cundinamarca cemetery was found the nest highest density (118 nest/ha, with a tombs occupation percentage of 13.9%. We discussed the importance of cemeteries as an alternative for wild bees nesting sites conservation in urban areas.Se encontraron 203 nidos de abejas sin aguijón pertenecientes a 15 especies en 11 cementerios de los departamentos de Cundinamarca y Meta (Colombia. El 61% de los nidos encontrados pertenecen a abejas del género Nannotrigona Cokerell, 1922. La especie con el mayor número de nidos y mayor representatividad en los cementerios estudiados fue Nannotrigona mellaria; Trigona (Tetragonisca angustula se encontró en todos los cementerios estudiados pero, en un porcentaje menor que N. mellaria (29% del total. La densidad máxima encontrada fue de 118 nidos/ha, con un porcentaje de ocupación de las tumbas de 13,9% en el cementerio de Tena (Cundinamarca. Se discute sobre la importancia de los cementerios como alternativa para conservación de los sitios de nidificación para abejas silvestres en áreas urbanas.
Estudio cinético de una fermentación alcohólica utilizando miel de abejas como sustrato
José Ángel Gómez
2011-06-01
Full Text Available El artículo describe un estudio cinético de una fermentación alcohólica utilizando miel de abejas como sustrato; para este efecto se realizaron nueve fermentaciones en proceso discontinuo con un volumen, de 10 L, siguiendo el comportamiento de las concentraciones de sustrato, biomasa y producto en el tiempo. Se evaluó la conveniencia de factores como la agitación y la adición de nutrientes, además, se observa el efecto de las concentraciones iniciales de sustrato e inocula y el tipo de miel.
Un escaneo explorativo del genoma de la abeja ibérica para detectar loci candidatos a selección
Chavez-Galarza, Julio; Henriques, Dora; Muñoz, Irene; De La Rúa, Pilar; Azevedo, João; Patton, John C.; Johnston, J. Spencer; Pinto, M. Alice
2012-01-01
Estudios explorativos del genoma se ha convertido en un abordaje popular para detectar selección permitiendo un análisis de la adaptación local y especiación a nivel molecular en poblaciones. La abeja ibérica (Apis mellifera iberiensis) ha sido estudiada con una variedad de marcadores genéticos como alozimas, DNA mitocondrial y microsatélites, pero estos han revelado complejos patrones y procesos que aún deben ser analizados minuciosamente. En los últimos años, las nuevas tecnologias han faci...
Evaluación de los cambios pre y postcosecha de la miel de especies de abejas sin aguijón
Ascencio Tuso, Doris Jannet
2014-01-01
Este trabajo permitió establecer que de las abejas sin aguijón, Tetragonisca angustula (Latreille, 1811), por abundancia de nidos, volumen de miel, número de colmenas y adaptabilidad a diversos ambientes naturales en Colombia, es la especie con mayor potencial. Se caracterizaron cuatro tipos de potes según su estructura y las propiedades de la miel, evidenciando que este aspecto se debe tener en cuenta en el momento de la extracción. Se encontraron graves deficiencias en la calidad microbioló...
Leonidas Carrasco-Letelier
2012-06-01
Full Text Available This work studies the acute contact toxicity of oxalic acid (OA on a honeybee polyhybrid subspecies (Apis mellifera, which is the dominant biotype in southwestern zone of Uruguay (SWZU and the country's most important honey-producing region. We determined the mean lethal dose (LD50, as well as the no observed effect level (NOEL and the lowest observed effect level (LOEL values. We also estimated the total number of honeybees per hive in the test area. The aim was to assess the relationship between the maximum OA dose used in Uruguay (3.1 g OA per hive and the toxicological parameters of honeybees from SWZU. The current dose of 3.1 g OA per hive corresponds to 132.8 OA per honeybee since determined NOEL is 400 OA per honeybee; our results indicate that the current dose could be increased to 9.3 g OA per hive. The results also highlight some differences between the LD50 value in SWZU honeybees (548.95 OA per honeybee and some published LD50 values for other honeybee subspecies.Este trabajo estudió la toxicidad aguda por contacto del ácido oxálico (AO sobre una subespecie poli-híbrida de abejas (Apis mellifera, la cual es el biotipo dominante en la zona sudoeste de Uruguay (SWZU, la región más importante para la producción de miel en este país. Este estudio determinó la dosis letal 50 (DL50, así como el nivel de efecto no observado (NOEL, el nivel de efecto mínimo observado (LOEL, y el número total de individuos por colmena. El propósito fue evaluar la relación entre la dosis máxima de AO usada en Uruguay (3.1 g AO por colmena y los parámetros toxicológicos de las abejas de la SWZU. Los resultados mostraron que es posible elevar la dosis actual de AO por colmena a 9.3 g, ya que la dosis actual de 3.1 g de AO corresponde a 132.8 AO por abeja, y el NOEL determinado es 400 AO por abeja. Los resultados también destacaron algunas diferencias entre la DL50 de las abejas del SWZU (548.95 AO por abeja y algunos valores de DL50 publicados
González Víctor Hugo
2000-06-01
Full Text Available Las abejas silvestres de Colombia, al igual que las del resto del mundo, están sufriendo los rigores de las actividades desarrolladas por el hombre y así se catalogan como organismos en peligro. El conocimiento actual de las abejas en nuestro país, como muchos otros insectos, todavía se encuentra en una fase muy incipiente; es fragmentado, local y carece de una síntesis. Tan sólo se conoce racionalmente 5% de las abejas del país, especialmente las especies corbiculadas de la familia Apidae. Muy poco trabajo taxonómico ha sido realizado por investigadores colombianos y prácticamente no existen trabajos por autores extranjeros enfocados en la fauna colombiana. La carencia de especialistas, las dificultades para el envío de material al exterior y la falta de recursos han dificultado la tarea. Sin embargo, la alta riqueza de especies que creemos se encuentra en el país representa una razón más para avanzaren el conocimiento y entendimiento de la biodiversidad de éste grupo. En esta revisión se analizan las principales causas que ponen en riesgo las poblaciones y especies de la apifauna nativa: deforestación, pastoreo, la abeja africanizada y la explotación irracional de las abejas, entre otras. Se proponen algunas acciones a ser emprendidas conjuntamente con centros académicos, agricultores, campesinos, indígenas y la sociedad en general que permitan proteger las especies, teniendo en cuenta que median-te la polinización, se tornan en eslabones esenciales dentro de los ecosistemas permitiendo la conservación de muchas especies vegetales y otras comunidades.The Colombian wild bees, as well as those in the rest of the whole world are undergoing the rigor of human activities and so are considered to be under threat of extinction. The current knowledge about Colombian bees, like other insects, is still in its beginnings, is fragmentated and a synthesis is desirable. Only 5% of the Colombian bees are well known, especially the
XIMENA ARANEDA D.
2010-12-01
Full Text Available Entre los factores que pueden ayudar a disminuir y controlar la población de Varroa destructor en colonias de Apis mellifera está el comportamiento de acicalamiento. Este comportamiento consiste en la capacidad de la abeja de detectar, morder y eliminar los parásitos en etapa forética. En esta investigación se analizó la presencia del comportamiento de acicalamiento en colonias de abejas a través de la observación de ácaros dañados. Para ello se utilizaron seis colonias de abejas de la especie A. mellifera en colmenas tipo Langstroth, las cuales se evaluaron diariamente durante 30 días en abril y mayo del año 2008. Las muestras correspondieron a la caída diaria de ácaros a placas de metal con vaselina, ubicada en el piso de cada colmena por un periodo de 24 horas. Los resultados indicaron 95% de varroas caídas muertas y 5% vivas de un total de 2.005 varroas. Se encontró un 49% de ácaros con daños y 51% sin daños. Con base en lo observado existe la posibilidad de elegir colonias con comportamiento de acicalamiento de importancia como daño dorsal y daño completo sobre el acaro, lo cual puede ser muy útil para estudiar selección de abejas y diseñar estrategias de manejo integrado del ácaro V. destructor.Among the factors that can help to diminish and control populations of Varroa destructor in colonies of Apis mellifera is grooming behaviour. This behaviour consists of the capacity of the bee to detect, bite and eliminate parasites in the phoretic stage. In this investigation we evaluated the presence of grooming behavior in bee colonies through observations of damaged mites. For this we used six colonies of A. mellifera in Langstroth type beehives, which were evaluated daily for 30 days in April and May of 2008. The samples consisted of daily mite fall onto metal sheets coated with vaseline, placed in the floor of each beehive for a period of 24 hours. The results showed 95% of fallen mites dead and 5% alive out of a total
Danny Rodriguez
2014-07-01
Full Text Available La aplicación de plaguicidas en cultivos cercanos a las zonas de producción apícola puede afectarla supervivencia de las abejas y la calidad de los productos derivados de la colmena, por lo cual es de gran importancia realizar estudios de residualidad de estos agroquímicos en mieles yen otros productos apícolas. Para esto es indispensable desarrollar metodologías que permitan el análisis de estos contaminantes en productos apícolas. Este trabajo muestra los resultados en el desarrollo y optimización de una metodología multiresiduo para el análisis de 30 plaguicidas, incluyendo plaguicidas organoclorados, organofosforados y piretroides en miel de abejas. El método consistió en una extracción líquido-líquido, seguida de un paso de limpieza en fase solida usando una columna cargada con silica gel/florisil. El análisis de los plaguicidas fue realizado por cromatografía de gases con detectores de nitrógeno fósforo (NPD y microcaptura electrónica (µ-ECD.La optimización de las variables experimentales presentes en los pasos de pre-tratamiento, extracción y limpieza se realizó mediante el empleo del método simplex modificado. Con este fin, se escogieron 14 variables las cuales se optimizaron en 21 experimentos. Los resultados mostraron que los porcentajes de recuperación obtenidos para la mayoría de los plaguicidas se encuentran entre el 78.8% y el 114.5%, con coeficientes de variación inferiores al 20%.
María C. Telleria
2009-07-01
Full Text Available Entomopalynological studies of Asteraceae in Argentina revealed that 64 taxa occurred in food stored by honeybees. The most visited plant tribes were classified according to both the type of reward provided by the different taxa and the intensity that such reward is collected by honeybees. Exotic plant taxa were intensely visited inside the disturbed areas (e.g. Cardueae and Cichorieae tribes, whereas native taxa (e.g. Barnadesioideae, Mutisieae, Astereae and Eupatorieae were intensely visited in less disturbed areas. A large number of identified taxa of Asteraceae and the evaluation of its importance to honeybee nutrition were presented. The present study contributes to the knowledge of relationship between Asteraceae and honeybees.A partir de estudios entomopalinológicos se encontró que 64 taxa pertenecientes a la familia Asteraceae están presentes en los alimentos almacenados por las abejas melíferas. Los representantes exóticos fueron intensamente visitados en las áreas más alteradas (e.g. Cardueae and Cichorieae, mientras que algunos representantes nativos (e.g. Barnadesioideae, Mutisieae, Astereae y Eupatorieae fueron intensamente visitados en áreas menos alteradas. Se presenta un importante número de taxa de Asteraceae relevantes para la nutrición de las abejas melíferas. El presente trabajo contribuye a conocer la relación entre Asteraceae y abejas melíferas.
Danny Rodriguez; Amanda Díaz; Diego Ahumada; Jairo Guerrero
2014-01-01
La aplicación de plaguicidas en cultivos cercanos a las zonas de producción apícola puede afectarla supervivencia de las abejas y la calidad de los productos derivados de la colmena, por lo cual es de gran importancia realizar estudios de residualidad de estos agroquímicos en mieles yen otros productos apícolas. Para esto es indispensable desarrollar metodologías que permitan el análisis de estos contaminantes en productos apícolas. Este trabajo muestra los resultados en el desarrollo y optim...
Fuenmayor Bobadilla, Carlos Alberto
2009-01-01
La masificación de las tendencias vegetarianas y saludables de consumo y la creciente preocupación de los consumidores por el impacto ambiental de los productos, han estimulado la búsqueda de fuentes alternativas de proteínas, en particular de origen vegetal, que puedan reemplazar las fuentes tradicionales (proteína animal) sin desventajas desde el punto de vista de su valor biológico. El polen apícola es un producto originalmente recolectado por las abejas obreras y que es cosechado por a...
Smith Pardo Allan Henry
1999-06-01
Full Text Available Se evalúo la eficacia de cinco métodos para la captura de abejas en algunos bosques y rastrojos bajos de la que será la zona de influencia del embalse Porce II ( Antioquia, Colombia S.A.; los métodos utilizados, consistieron en : jameo a través de dos transectos de 100 m de largo por 2m de ancho, la utilización de trampas Van Somer con pescado descompuesto como cebo, trampas Malaise de 2 m de ancho por 2 m de largo, platos amarillos sobre un pedestal de 1.5 m de altura y finalmente tarros portadores de esencias; todas las trampas estuvieron separadas 12 m entre si y fueron ubicadas al azar por sorteo. En cuanto a la abundancia, riqueza y a los índices de diversidad para las abejas capturadas se destacaron como métodos de evaluación las trampas Van Somer con pescado descompuesto como cebo y el jameo ( más comúnmente utilizado , adicionalmente, el análisis del índice de similitud de Jaccard y de las morfoespecies capturadas por cada método mostraron que cada uno de estos capturó cierta cantidad de morfoespecies exclusivamente.
Clara Isabel Aguilar Sierra
2008-12-01
Full Text Available En cuatro localidades de la zona de influencia del embalse Porce II (Antioquia, Colombia, se observó el comportamiento de 23 taxones de abejas durante sus visitas a Aspilia tenella (Kunth S. F. Blake; se registró el número de individuos y el tiempo total de visita y se midieron la temperatura y la humedad relativa. Los análisis de varianza indican que hubo una relación estadísticamente significativa en cuanto a los atributos considerados para las especies de abejas y una covariación significativa con las variables ambientales. Las pruebas de rangos múltiples muestran que Trigona nigerrima es la especie con los mayores valores promedio para el número de individuos y el tiempo de visita. En el estudio de las cargas polínicas se encontraron 30 tipos polínicos, dentro de los cuales A. tenella presentó el mayor porcentaje; Piper aduncum, Miconia minuti flora, Psidium guajava, Rapanea sp., Mimosa pudica y Psychotria sp., en su orden, son otras fuentes de polen importantes para varias de las especies de abejas. El análisis de agrupamiento para las abejas capturadas permitió diferenciar dos grupos: el primero incluye a 18 especies cuyas cargas polínicas que poseían una abundancia relativa de granos de polen de A. tenella por encima de 77%; el segundo grupo estaba conformado por cinco especies de abejas que recolectaron porcentajes mayores de otros tipos polínicos: Exomalopsis sp. 1 (90,4% de M. minuti flora; Lasioglossum sp. 1 y Coelioxys aff. mexicana (77,4% y 64,1% de P. aduncum, respectivamente; Exomalopsis sp. 2 (67,1% de P. guajava y Auglochloropsis vesta (55,5% de Rapanea sp.. Trigona fulviventris y Apis mellifera presentaron los valores más altos de riqueza de tipos polínicos en las cargas de polen; ello evidencia sus nichos tróficos amplios y su comportamiento generalista de visita.We observed the behavior of 23 species of wild bees visiting Aspilia tenella (Kunth S .F. Blake in four different localities of the Porce II dam
Botero Garcés Natalia
2000-06-01
Full Text Available La necesidad de diversificar cultivos ha marcado el comienzo de otras alternativas agronómicas en nuestro país tales como la producción de manzano. Hace unos 6 años se inició en Colombia la plantación de cultivares comerciales mejorados de cuya biología y necesidades poco se sabe. Se planteó un estudio sobre la influencia de la polinización entomófila en la producción de manzana Anna. El trabajo se desarrolló en un cultivo de manzano en el Municipio del Carmen de Viboral (Oriente Antioqueño, correspondiente a la zona de vida bosque húmedo montano bajo (bh-MB, con temperatura promedio anual de 14-24°C, altura de 2200 msnm y precipitación promedio anual de 1800 mm. Se propuso estimar el efecto de los insectos polinizadores en la producción, comparando ésta en ramas enjauladas excluidas de todos los visitantes florales, con la de ramas expuestas a éstos durante la floración, en árboles escogidos al azar. Se encontró que las ramas que habían sido visitadas por insectos producían significativamente más manzanas (t = 2,95, para t0.05 con 18 g.l., con mayor pesos (t=2,21, para t0.05 con 18 g.l. y mayor número de semillas (t=3.75, para t0.05 con 18 g.l., que ramas sin acceso de visitantes florales. Una medición de índices de diversidad mostró que la abeja melífera (Apis mellifera L. constituyó el 76% de los visitantes florales y que la diversidad fue muy baja (λ=0.7439. Se concluyó que el manzano Anna requiere polinización entomófila, que la abeja melífera fue el polinizador más importante y que se incrementó significativamente la producción de frutos bajo la influencia de esta especie de abeja. Se recomienda la introducción al cultivo de Apis mellifera al momento de la floración, para garantizar una producción adecuada.
Ximena Araneda Durán
2010-06-01
Full Text Available Recent introduction of hybrid varieties raises the question if bees (Apis mellifera L. contribute as pollinator agents in developing the full yield potential of rapeseed (Brassica napus L.. In order to evaluate the yield achieved by B. napus cv. Artus pollinated by A. mellifera testing was carried out in the district of Freire, La Araucanía Region, Chile. This consisted in isolating or excluding rapeseed plants from pollinators with exclusion cages. Treatments applied were total exclusion (T1, partial exclusion (T2 and free pollination (T0 with a density of 6.5 hives ha-1, in order to determine the following yield components traits: grains per silique, siliques per plant, 1000 grain weight and yield. The experimental design used was randomized complete blocks with three treatments and three replicates. Results obtained show that the parameter least affected by bee intervention was the grains per silique variable. In contrast, siliques per plant and 1000 grain weight parameters presented significant differences, contributing to a yield greater than 5 t ha-1; which represented a figure 50.34% higher than in the treatment without bees. It may be concluded that the inclusion of bees in crops is fully justified as a production tool.La reciente introducción de variedades híbridas plantea la interrogante de la contribución que pueda tener la presencia de abejas (Apis mellifera L. como agentes polinizadores para desarrollar en pleno el potencial productivo del raps (Brassica napus L.. Con el objetivo de evaluar el rendimiento alcanzado por B. napus cv. Artus polinizado por A. mellifera, se realizó un ensayo en la localidad de Freire, Región de La Araucanía, Chile. Éste consistió en aislar o excluir las plantas de raps de los polinizadores mediante el uso de jaulas excluidoras. Los tratamientos consistieron en la exclusión total (T1, exclusión parcial (T2 y libre polinización (T0 con una densidad de 6,5 colmenas ha-1, con el fin de determinar
Liliana Ramírez-Freire
2012-03-01
Full Text Available Se realizó un estudio faunístico de las abejas del género Agapostemon (Halictidae en el estado de Nuevo León, México para conocer las especies presentes, su distribución, relación con la flora y tipos de vegetación del estado. La metodología se basó en la revisión de literatura y de bases de datos de colecciones entomológicas, y en muestreos en campo donde se utilizó red entomológica y platos trampa de colores amarillo, azul, rosa (tonos fluorescentes y blanco. Sólo en 20 de los 35 muestreos que se realizaron se obtuvieron ejemplares del género. Se recolectaron 11 especies, 2 de las cuales son registros nuevos para el estado (A. nasutus y A. splendens. El 12.31% de los ejemplares se obtuvo mediante el uso de red y el 87.84% con los platos trampa; el color amarillo fue el preferido por las abejas. Las especies con mayor distribución fueron A. tyleri y A. angelicus /A. texanus; se recolectaron en 9 especies de plantas pertenecientes a 6 familias. Helianthus annuus (Compositae presentó la mayor diversidad con 4 especies de Agapostemon. Los muestreos se realizaron en 10 diferentes tipos de vegetación y la mayor riqueza de especies se obtuvo en diversos matorrales y en la vegetación de disturbio.A study of the bee genus Agapostemon (Halictidae in the state of Nuevo León, Mexico was carried out to learn about species numbers, distribution, relationship to flora and vegetation types of the state. Methodology was based on a review of literature and databases from enthomological collections, for field sampling net and pan traps were used in yellow, blue, pink (fluorescent colors and white. A total of 35 sites along the state were visited, Agapostemon specimens were found only in 20 sites. We collected 11 species, 2 of them as new records for the state (A. nasutus and A. splendens. From the total specimens, 12.31% was obtained with the use of net and 87.84% using pan traps, being yellow the preferred color. The most widely distributed
Arturo Roig Alsina
2009-12-01
Full Text Available A revision of the bee genus Nomada Scopoli in Argentina is presented. Nine species are recognized in this region, five of which are described as new: N. mesopotamica, N. longula, N. chacoana, N. missionica, and N. turrigera. Lectotypes are designated for N. pampicola Holmberg, 1886, and N. costalis Brèthes, 1909. A new name, N. holmbergiana, is proposed for Hypochrotaenia parvula Holmberg, 1886, preoccupied in Nomada, and a neotype is designated for H. parvula Holmberg. A key to the species, descriptions, distributional data, and illustrations are provided.Se presenta una revisión de las abejas del género Nomada Scopoli en la Argentina. Se reconocen nueve especies en esta región, de las cuales cinco se describen como nuevas: N. mesopotamica, N. longula, N. chacoana, N. missionica y N. turrigera. Se designan lectotipos para N. pampicola Holmberg, 1886, y N. costalis Brèthes, 1909. Se propone un nuevo nombre, N. holmbergiana, para Hypochrotaenia parvula Holmberg, 1886, preocupado en Nomada, y se designa un neotipo para H. parvula Holmberg. Se presenta una clave para las especies, descripciones, datos de distribución e ilustraciones.
Yorexis Guilarte Navarro
2012-04-01
Full Text Available Los alimentos están expuestos a agentes físicos, químicos o biológicos, causando un efecto adverso para la salud. Un estudio poblacional arrojó que el mayor % de los casos diarreicos tuvo relación con la ingestión de alimentos, lo que evidencia, que estos tienen importantes cargas bacterianas desde su origen. En el caso de la miel de abeja, los principales peligros están dados por contaminación de envases, por presencia de antibióticos y por fermentación. Como solución, se desarrolló y validó un instrumento que se sustenta en la Gestión de la Higiene y la Calidad, aplicable al diagnóstico de los 7 planes previos de higiene y trazabilidad, necesario para implantar un sistema Hazard Analysis Critical Control Point (HACCP en cualquier empresa del sector agroalimentario, capaz de, medir los programas prerrequisitos del sistema descrito. Sometido a validación de contenido por Delphy, la herramienta final obtuvo, la aprobación de los expertos, que otorgan alta confiabilidad a valores obtenidos por encima del 90% de cumplimiento. La herramienta permitió organizar y evaluar los prerrequisitos del Sistema HACCP, además de evaluar los resultados de su implantación, en el beneficio de la miel. La validación del Sistema HACCP, arroja resultados satisfactorios, reflejándose en la obtención de un producto inocuo.
Real Language Meets Real Business
Muirhead, Muirhead; Schechter, Sarah
2016-01-01
The Real Business Language Challenge was a collaborative pilot project between Coca-Cola Enterprises (CCE) and Routes into Languages East for Year 9 and 10 pupils. It was based on CCE's award-winning Real Business Challenge, part of its highly acclaimed education programme. The Real Business Language Challenge transformed the project into a…
2006-01-01
What’s hot and what’s not in China’s property market The Beijing 2008 Olympics is a giant magnet for real estate investment, but how far-reaching is its pull? Is it a good time to buy real estate in second-tier cities? And could a bal- looning worldwide real estate bubble have ramifications for China? Inquiring minds want to know the answers to all these questions in real estate circles. Experts may not always answer harmoniously, but unless you have a villa empire, their advice could help you conquer this tricky market more successfully. No bubble in Beijing or beyond The Olympic effect will cause real
Diego P. Vázquez
2008-12-01
Full Text Available Reserves aim mainly at preventing or mitigating human impacts on natural ecosystems. It is important to assess how well reserves meet this goal. We evaluated whether habitat protection offered by Ñacuñán Biosphere Reserve (Central Monte desert, Argentina results in detectable changes in habitat structure and the species richness and composition of bees and wasps. We conducted pan trap sampling and flower visitor observations in six pairs of protected and unprotected sites. Our results suggest that thirty fi ve years of cattle exclusion in Ñacuñán have had detectable effects on habitat structure. However, these changes in habitat structure translated only into partial and conflicting effects on hymenopteran richness, and did not have detectable effects on hymenopteran composition. Our study should be repeated with a greater sampling effort and throughout multiple years before our results can be applied to guide management decisions.El principal objetivo de las reservas es prevenir o mitigar los impactos humanos sobre los ecosistemas naturales. Es importante evaluar cuán bien las reservas alcanzan este objetivo. Evaluamos si la protección del hábitat que brinda la Reserva de la Biósfera de Ñacuñán (Monte Central, Argentina resulta en cambios detectables en la estructura del hábitat, y en la riqueza y la composición de especies de abejas y avispas. Realizamos muestreos con trampas bandeja y observaciones de visitantes florales en seis pares de sitios dentro y fuera de la reserva. Nuestros resultados sugieren que los treinta y cinco años de exclusión del ganado vacuno en Ñacuñán han tenido efectos detectables sobre la estructura del hábitat. Sin embargo, estos cambios en el hábitat se tradujeron sólo en efectos parciales y conflictivos sobre la riqueza de himenópteros, y no tuvieron efectos detectables sobre la composición de himenópteros. Nuestro estudio debería repetirse en el futuro, con un mayor esfuerzo de muestreo y
Gagnon, Jennifer; Fisher, Jason
2013-01-01
Virginia is poised to see an unprecedented change in forest land ownership. To provide new landowners with information on sustainable forest management, we developed a two-part program, Real Forestry for Real Estate. First, we assembled New Landowner Packets, which contain a variety of sustainable forest management resources. Second, two…
Loeb, Peter A
2016-01-01
This textbook is designed for a year-long course in real analysis taken by beginning graduate and advanced undergraduate students in mathematics and other areas such as statistics, engineering, and economics. Written by one of the leading scholars in the field, it elegantly explores the core concepts in real analysis and introduces new, accessible methods for both students and instructors. The first half of the book develops both Lebesgue measure and, with essentially no additional work for the student, general Borel measures for the real line. Notation indicates when a result holds only for Lebesgue measure. Differentiation and absolute continuity are presented using a local maximal function, resulting in an exposition that is both simpler and more general than the traditional approach. The second half deals with general measures and functional analysis, including Hilbert spaces, Fourier series, and the Riesz representation theorem for positive linear functionals on continuous functions with compact support....
Ricardo Ayala
2012-06-01
Full Text Available Two new species of squash bees, Peponapis pacifica Ayala and Griswold sp. n. and P. parkeri Griswold and Ayala sp. n., are described and illustrated. Peponapis pacifica is oligolectic on flowers of Schizocarpum longisepalum (Cucurbitaceae endemic to Mexico, where it is found in the tropical dry forest along the Pacific Coast, between Sonora and Chiapas and in the Balsas River basin; and P. parkeri is known only from the Pacific slope of Costa Rica. A key for the North and Central American species of Peponapis is provided.Se describen e ilustran 2 especies nuevas de abejas, Peponapis pacifica Ayala and Griswold sp. n. y P. parkeri Griswold and Ayala sp. n. De éstas, P. pacifica es oligoléctica sobre flores de Schizocarpum longisepalum (Cucurbitaceae, endémica de México, con distribución asociada al bosque tropical caducifolio a lo largo de la vertiente del Pacífico entre Sonora y Chiapas y en la Cuenca del río Balsas; P. parkeri es conocida sólo para la vertiente del Pacífico de Costa Rica. Se incluye una clave para las especies de América del norte y central.
Badr, Salah M.; Bruztman, Donald P.; Nelson, Michael L.; Byrnes, Ronald Benton, Jr.
1992-01-01
This paper presents an introduction to the basic issues involved in real-time systems. Both real-time operating sys and real-time programming languages are explored. Concurrent programming and process synchronization and communication are also discussed. The real-time requirements of the Naval Postgraduate School Autonomous Under Vehicle (AUV) are then examined. Autonomous underwater vehicle (AUV), hard real-time system, real-time operating system, real-time programming language, real-time sy...
Dreyfus, Thomas
2015-01-01
In this paper, we develop a difference Galois theory in the setting of real fields. After proving the existence and uniqueness of the real Picard-Vessiot extension, we define the real difference Galois group and prove a Galois correspondence.
Jorge Marcangeli
2004-12-01
Full Text Available El objetivo del presente trabajo fue evaluar la eficacia acaricida del Oxavar® en el control del ácaro ectoparásito Varroa destructor (Anderson & Trueman. El trabajo fue realizado en el apiario experimental del Centro de Extensión Apícola ubicado en Coronel Vidal, provincia de Buenos Aires. Se seleccionaron diez colmenas tipo Langstroth que fueron divididas en dos grupos: a cinco colmenas con tres cuadros cubiertos completamente de cría en desarrollo y b cinco colmenas con seis cuadros cubiertos por cría. Ambos grupos recibieron cinco ml of Oxavar® (Apilab, Argentina; 64,6 g/l de ácido oxálico en agua destilada por cuadro cubierto por abejas adultas en tres dosis a intervalos de siete días. Semanalmente, se colectaron los ácaros muertos de los pisos especiales provistos a las colmenas de estudio con el objeto de evitar su remoción por parte de las abejas. Una vez concluido el tratamiento, en cada colmena se introdujeron dos tiras plásticas de Apistan® (Roteh, Argentina para eliminar los ácaros remanentes y poder así calcular la eficacia acaricida del Oxavar®. Los resultados mostraron que la eficacia del Oxavar® en el primer grupo (85,6% ± 1,4 resultó significativamente superior a la registrada en el segundo grupo (75,7 ± 1,7. Estas diferencias fueron testeadas a partir del número total de ácaros eliminados por el Oxavar® y Apistan® en ambos grupos de colmenas (pThe aim of this work was to evaluate the effect of honeybee brood on acaricide efficacy of Oxavar® to control the ectoparasitic mite Varroa destructor (Anderson & Trueman. Work was done at Centro de Extensión Apícola experimental apiary located at Coronel Vidal, province of Buenos Aires. Ten Langstroth hives were selected and divided in two groups: a hives containing three honeybee combs full of brood and b hives containing six honeybee brood combs. Both groups received five ml of Oxavar® (Laboratorio Apilab, Argentina; 64.6 g/l oxalic acid in destilled water
Mahé, Louis; Roy, Marie-Françoise
1992-01-01
Ten years after the first Rennes international meeting on real algebraic geometry, the second one looked at the developments in the subject during the intervening decade - see the 6 survey papers listed below. Further contributions from the participants on recent research covered real algebra and geometry, topology of real algebraic varieties and 16thHilbert problem, classical algebraic geometry, techniques in real algebraic geometry, algorithms in real algebraic geometry, semialgebraic geometry, real analytic geometry. CONTENTS: Survey papers: M. Knebusch: Semialgebraic topology in the last ten years.- R. Parimala: Algebraic and topological invariants of real algebraic varieties.- Polotovskii, G.M.: On the classification of decomposing plane algebraic curves.- Scheiderer, C.: Real algebra and its applications to geometry in the last ten years: some major developments and results.- Shustin, E.L.: Topology of real plane algebraic curves.- Silhol, R.: Moduli problems in real algebraic geometry. Further contribu...
Full Text Available ... Depression Publications About Men and Depression Getting Help Real Stories of Depression Bill Maruyama , Lawyer Jimmy Brown , ... in Men Signs & Symptoms Depression Treatment Getting Help Real Stories of Depression Publications About Men and Depression ...
Arthan, R. D.
2004-01-01
This note describes a representation of the real numbers due to Schanuel. The representation lets us construct the real numbers from first principles. Like the well-known construction of the real numbers using Dedekind cuts, the idea is inspired by the ancient Greek theory of proportion, due to Eudoxus. However, unlike the Dedekind construction, the construction proceeds directly from the integers to the real numbers bypassing the intermediate construction of the rational numbers. The constru...
Electricity Real Options Valuation
Broszkiewicz-Suwaj, Ewa
2006-01-01
In this paper a real option approach for the valuation of real assets is presented. Two continuous time models used for valuation are described: geometric Brownian motion model and interest rate model. The valuation for electricity spread option under Vasicek interest model is placed and the formulas for parameter estimators are calculated. The theoretical part is confronted with real data from electricity market.
Real Estate Diversification Benefits
Dirk P.M. De Wit
1997-01-01
Diversification benefits are shown to vary inversely with the correlation between asset returns. The present study estimates average correlation coefficients between real-estate returns from property-specific data of an internationally diversified real estate and in the Netherlands. It is found that diversification benefits within the United States are much larger than on the European Continent. The low correlation found between U.S. real estate returns implies that portfolios of small number...
Fleiberk, Tomáš
2009-01-01
The first part of this diploma thesis focuses on theoretical basis, which means definitions of basic terms related to real estates and valuation, cadastre of real estates, definitions of price and value, activity of valuers and real estate experts and two approaches to valuation, so called administrative and market valuation. The practical part begins with the apartment market analysis in the Czech republic in 2010 followed by the valuation of apartment. For the possibility of further compari...
2006-01-01
Project: Shihua International Center Developer: Beijing Urban Construction Real Estate Co. Ltd. Location: Inner side of Jingguangqiao Overpass along the East Third Ring Road, Beijing Project Introduction: On the afternoon of March 30, Beijing Urban Construction Real Estate Co. Ltd. and Beijing Huihe Real Estate Co. Ltd. held the first introductory conference on the project of Shihua International Center in the Conference Hall of Jingguanq Center. At the conference,
Don T. Johnson
2006-01-01
Purpose –Aims to explain the rationale for producing an issue on the topic of real estate investing and how these articles fit together. Design/methodology/approach - Essay format. Findings - Real estate is probably the largest category of assets for investors and the works in this issue will assist in the decision making processes of real estate investors. Research limitations/implications - Each of these papers covers only a limited topic and more research in the area is needed. Practical i...
Jean-François Degbomont
2010-10-01
Full Text Available This paper addresses the symbolic representation of non-convex real polyhedra, i.e., sets of real vectors satisfying arbitrary Boolean combinations of linear constraints. We develop an original data structure for representing such sets, based on an implicit and concise encoding of a known structure, the Real Vector Automaton. The resulting formalism provides a canonical representation of polyhedra, is closed under Boolean operators, and admits an efficient decision procedure for testing the membership of a vector.
Jean-François Degbomont; Julien Brusten; Bernard Boigelot
2010-01-01
This paper addresses the symbolic representation of non-convex real polyhedra, i.e., sets of real vectors satisfying arbitrary Boolean combinations of linear constraints. We develop an original data structure for representing such sets, based on an implicit and concise encoding of a known structure, the Real Vector Automaton. The resulting formalism provides a canonical representation of polyhedra, is closed under Boolean operators, and admits an efficient decision procedure for testing the ...
Jawad, Mohamad
2016-01-01
The purpose of the thesis was to implement the most efficient user interface (UI) for Real-estate in Finland for client companies due to their desire of having this feature in their system. The prototype was supposed to show the clients how the feature works to get needed data for real-estate properties in Finland in their map system. National Land Survey MML of Finland was chosen for tracking the real-estate properties data in the system. The real-estate prototype was developed by Micros...
Real Change for the Real Economy
2010-01-01
To tackle the problem of excess liquidity, it is extremely urgent to lead private speculative money into the investment sector. Developing strategic emerging industries will open a new investment channel for private capital and might help divert a certain amount from the virtual economy to real business operations.
Christensen, Knud Smed
2000-01-01
Describes fundamentals of parallel programming and a kernel for that. Describes methods for modelling and checking parallel problems. Real time problems.......Describes fundamentals of parallel programming and a kernel for that. Describes methods for modelling and checking parallel problems. Real time problems....
Markwig, Hannah; Rau, Johannes
2014-01-01
In this paper, we define tropical analogues of real Hurwitz numbers, i.e. numbers of covers of surfaces with compatible involutions satisfying prescribed ramification properties. We prove a correspondence theorem stating the equality of the tropical numbers with their real counterparts. We apply this theorem to the case of double Hurwitz numbers (which generalizes our result from arXiv:1409.8095).
Lan; Xinzhen
2013-01-01
Further regulation in the real estate market is a must,but tighter controls won’t be easy Several government departments released a joint circular to control borrowing by local governments, which is the first policy involving the real estate market in the new year.
Real Estate Career Opportunities.
Lyon, Robert; Gardner, Gene
Designed to provide basic information on the major entry-level career fields in real estate, this document can be used as a reference manual for counselors and instructors. The manual contains general information about the following real estate careers: salesperson, sales manager, broker, land developer, property manager, appraiser, mortgage loan…
Sohrab, Houshang H
2014-01-01
This expanded second edition presents the fundamentals and touchstone results of real analysis in full rigor, but in a style that requires little prior familiarity with proofs or mathematical language. The text is a comprehensive and largely self-contained introduction to the theory of real-valued functions of a real variable. The chapters on Lebesgue measure and integral have been rewritten entirely and greatly improved. They now contain Lebesgue’s differentiation theorem as well as his versions of the Fundamental Theorem(s) of Calculus. With expanded chapters, additional problems, and an expansive solutions manual, Basic Real Analysis, Second Edition, is ideal for senior undergraduates and first-year graduate students, both as a classroom text and a self-study guide. Reviews of first edition: The book is a clear and well-structured introduction to real analysis aimed at senior undergraduate and beginning graduate students. The prerequisites are few, but a certain mathematical sophistication is required. ....
Marta Caccavari
2010-12-01
Full Text Available Taxonomic recognition and quantification of the different pollen types collected by bees offer the most direct method to study the diet. To determine the importance of each plant taxon, it is necessary to separate the pollen deposited only in the collecting structures in order to minimize contamination of grains collected passively in other parts of the body. The technique currently applied is based on the mechanical removal of the pollen loads with dissecting needles and repeated washings with ethanol. Metathoracic scopae that underwent this procedure showed traces of pollen in varying amounts when observed under the microscope. As an alternative to this technique chemical removal using HOK is proposed. The leg is removed and treated separatedly to avoid contamination. The deflocculant properties of HOK successfully allowed to separate the pollen adhered to the scopae, which can be then returned to the individual, unaffected by the procedure. Suspend the pollen in a know quantity of mounting fluid permit take the subsamples and determine the total number of pollen grains of each taxon. In this paper, the new technique is presented and its effectiveness is compared to the technique currenty used.El reconocimiento taxonómico y la cuantificación de los distintos tipos polínicos colectados por las abejas ofrecen el método más directo para estudiar la dieta. Para determinar la importancia de cada taxón vegetal y minimizar la contaminación, es necesario separar el polen depositado en las estructuras de colecta, de los granos recolectados en forma pasiva en otras partes del cuerpo. La técnica que se aplica hasta el momento se basa en la remoción mecánica de las cargas polínicas con agujas de disección y sucesivos lavados con etanol. Escopas de patas metatoráxicas sometidas a este procedimiento al ser observadas bajo lupa presentaban aún granos de polen en cantidades variables. Como una alternativa a esta técnica proponemos la remoci
Eisemann, Elmar; Assarsson, Ulf; Wimmer, Michael
2011-01-01
Important elements of games, movies, and other computer-generated content, shadows are crucial for enhancing realism and providing important visual cues. In recent years, there have been notable improvements in visual quality and speed, making high-quality realistic real-time shadows a reachable goal. Real-Time Shadows is a comprehensive guide to the theory and practice of real-time shadow techniques. It covers a large variety of different effects, including hard, soft, volumetric, and semi-transparent shadows.The book explains the basics as well as many advanced aspects related to the domain
Amy Peng; Louis N. Christofides
2009-01-01
We process information in a large number of Canadian wage contracts, signed over a period of several decades, to generate the long-run history of the real wage for each bargaining pair. We term these hitherto unexamined histories ‘chronologies’. We are able to generate 1574 continuous real wage chronologies and we examine the evolution of the real wage in each case. We explore the influence of productivity growth, the labour relations record of the pair, the influence of industry and region a...
Schramm, Michael J
2008-01-01
This text forms a bridge between courses in calculus and real analysis. It focuses on the construction of mathematical proofs as well as their final content. Suitable for upper-level undergraduates and graduate students of real analysis, it also provides a vital reference book for advanced courses in mathematics.The four-part treatment begins with an introduction to basic logical structures and techniques of proof, including discussions of the cardinality concept and the algebraic and order structures of the real and rational number systems. Part Two presents in-depth examinations of the compl
Montgomery County of Maryland — This data represents all of the County’s residential real estate properties and all of the associated tax charges and credits with that property processed at the...
... Men and Depression Getting Help Real Stories of Depression Bill Maruyama , Lawyer Jimmy Brown , Firefighter Melvin Martin , ... Sierra , Trauma and Recovery Specialist Share Men and Depression Depression in Men Signs & Symptoms Depression Treatment Getting ...
Full Text Available ... Men and Depression Getting Help Real Stories of Depression Bill Maruyama , Lawyer Jimmy Brown , Firefighter Melvin Martin , ... Sierra , Trauma and Recovery Specialist Share Men and Depression Depression in Men Signs & Symptoms Depression Treatment Getting ...
无
2010-01-01
Stronger Demand in Shanghai Jones Lang LaSalle released its thirdquarter review report on the Shanghai real estate market.In Shanghai’s Puxi area,expansion of foreign-invested companies’ and clients’ needs for upgraded
Motahari, Abolfazl Seyed; Maddah-Ali, Mohammad-Ali; Khandani, Amir Keyvan
2010-01-01
In this paper, we show that the total Degrees-Of-Freedoms (DOF) of the $K$-user Gaussian Interference Channel (GIC) can be achieved by incorporating a new alignment technique known as \\emph{real interference alignment}. This technique compared to its ancestor \\emph{vector interference alignment} performs on a single real line and exploits the properties of real numbers to provide optimal signaling. The real interference alignment relies on a new coding scheme in which several data streams having fractional multiplexing gains are sent by transmitters and interfering streams are aligned at receivers. The coding scheme is backed up by a recent result in the field of Diophantine approximation, which states that the convergence part of the Khintchine-Groshev theorem holds for points on non-degenerate manifolds.
Montgomery County of Maryland — The Levy Year 2012 real property tax rate dataset reflects all the rates per $100 set each year by the County Council. These rates are applied to the assessed value...
无
2006-01-01
Huaye International Center Location: Northwest Corner of Honglingjinqiao of Dongsihuanlu Investor: Huaye Real Estate Developer: Beijing Gaoshenghua Real Estate Development Co. Ltd. Hotline: 86-10-65858883 Introduction: Huaye International Center has a total floor space of about 80,000 square meters. It is a top-grade integrated business community, combining office buildings, five-star serviced apartments and recreational establishments. It is due to open in early 2007. Huaye is designed by prestigious Au...
Jelena Cvetinović
2013-05-01
Full Text Available Real estate appraisal in Republic of Serbia is an area where are many unknowns. Fortunately, nowadays in Serbia we have two professional associations of appraisers. As we know there are two types of appraisal ??? mass and individual appraisal and both requires standardized reports. This paper presents forms of valuation reports for individual real estate appraisal with its advantages and disadvantages. Process of real estate appraisal is complex and consists of several steps described in detail in paper with emphasis on selection of the method for valuation. Real estate report presents the final step in the process of valuation. In order to ensure usage of uniform real estate appraisal reports, national and international associations have adopted standards. All standards prescribe the minimum of required contents of report (professional standards, as well as ethical standards in order to ensure that all appraisers act highly professional, responsible and with integrity, and general conditions. Despite all measures in standardization there are still many problems in implementation, especially in countries where English is not a native language due to the fact that all standards are written in English.
Pugh, Charles C
2015-01-01
Based on an honors course taught by the author at UC Berkeley, this introduction to undergraduate real analysis gives a different emphasis by stressing the importance of pictures and hard problems. Topics include: a natural construction of the real numbers, four-dimensional visualization, basic point-set topology, function spaces, multivariable calculus via differential forms (leading to a simple proof of the Brouwer Fixed Point Theorem), and a pictorial treatment of Lebesgue theory. Over 150 detailed illustrations elucidate abstract concepts and salient points in proofs. The exposition is informal and relaxed, with many helpful asides, examples, some jokes, and occasional comments from mathematicians, such as Littlewood, Dieudonné, and Osserman. This book thus succeeds in being more comprehensive, more comprehensible, and more enjoyable, than standard introductions to analysis. New to the second edition of Real Mathematical Analysis is a presentation of Lebesgue integration done almost entirely using the un...
胡晓媛
2015-01-01
it is well-known that all men search for beauty.Although the definition of beauty changes as time goes by,people still spare no efforts to pursue beauty in their lives.Meanwhile,most people try every means to make their body images better.With more people increasingly being eager for beauty in various ways,it is high time that we should think deeply about the concept of real beauty.In this paper,an attempt has been made to shed light on the real beauty.It is not completely physical appearance or slim figure,but a healthy body and peaceful mind as well as admirable courage.Above all,whether people can realize the nature of real beauty is certainly worthwhile for us to ponder.
Real quaternionic calculus handbook
Morais, João Pedro; Sprößig, Wolfgang
2014-01-01
Real quaternion analysis is a multi-faceted subject. Created to describe phenomena in special relativity, electrodynamics, spin etc., it has developed into a body of material that interacts with many branches of mathematics, such as complex analysis, harmonic analysis, differential geometry, and differential equations. It is also a ubiquitous factor in the description and elucidation of problems in mathematical physics. In the meantime real quaternion analysis has become a well established branch in mathematics and has been greatly successful in many different directions. This book is based on concrete examples and exercises rather than general theorems, thus making it suitable for an introductory one- or two-semester undergraduate course on some of the major aspects of real quaternion analysis in exercises. Alternatively, it may be used for beginning graduate level courses and as a reference work. With exercises at the end of each chapter and its straightforward writing style the book addresses readers who ...
Real-time radiography is used for imaging both dynamic events and static objects. Fluorescent screens play an important role in converting radiation to light, which is then observed directly or intensified and detected. The radiographic parameters for real-time radiography are similar to conventional film radiography with special emphasis on statistics and magnification. Direct-viewing fluoroscopy uses the human eye as a detector of fluorescent screen light or the light from an intensifier. Remote-viewing systems replace the human observer with a television camera. The remote-viewing systems have many advantages over the direct-viewing conditions such as safety, image enhancement, and the capability to produce permanent records. This report reviews real-time imaging system parameters and components
Olano, Marc
2002-01-01
This book covers real-time shading systems, their design and how they work. Procedural shading, long valued for off-line rendering and production animation is now possible on interactive graphics hardware. These developments are important for areas such as game development, product design, and scientific visualization, among others. The authors include examples of techniques for achieving common effects efficiently in a real-time shading language ranging from full procedural shading on advanced specialized hardware to limited, yet surprisingly flexible shading on unextended OpenGL, to modern P
Real estate investment dynamics
Gruber, Johannes
2010-01-01
This thesis is motivated by the steadily increasing interest in the dynamic relationship between the macro-economy and the real estate sector. One of the main issues in this respect is to study the investment dynamics. Since the bursting of the U.S. housing bubble in 2006 is identified as the point of origin of the so called subprime crises, which led to the collapse of the U.S. financial system, the dynamics of real estate investments is of particular interest. In the first part of my the...
Ash, Robert B; Lukacs, E
1972-01-01
Real Analysis and Probability provides the background in real analysis needed for the study of probability. Topics covered range from measure and integration theory to functional analysis and basic concepts of probability. The interplay between measure theory and topology is also discussed, along with conditional probability and expectation, the central limit theorem, and strong laws of large numbers with respect to martingale theory.Comprised of eight chapters, this volume begins with an overview of the basic concepts of the theory of measure and integration, followed by a presentation of var
Equity Real Estate Investment Trusts and Real Estate Returns
S. Michael Giliberto
1990-01-01
Some investors view equity real estate investment trusts (EREITs) as partial substitutes for conventional real estate investments, although the correlation between EREIT and real estate returns is insignificant. However, this study finds that the residuals from regressions of both real estate series on financial asset returns are significantly correlated. This supports the notion that there is a common factor (or factors) associated with real estate that affects both sets of returns. In addit...
Carter, Margie
1995-01-01
Because ready role models for today's children are media-created superheroes and celebrities of television and film, children need real-life role models who guide them into realistic personal and social pathways. As principal adult contacts, teachers can be such role models. Specific strategies for encouraging teachers in this role are presented.…
Simmons, Joseph P.; Massey, Cade
2012-01-01
Is optimism real, or are optimistic forecasts just cheap talk? To help answer this question, we investigated whether optimistic predictions persist in the face of large incentives to be accurate. We asked National Football League football fans to predict the winner of a single game. Roughly half (the partisans) predicted a game involving their…
Kolmogorov, A N; Silverman, Richard A
1975-01-01
Self-contained and comprehensive, this elementary introduction to real and functional analysis is readily accessible to those with background in advanced calculus. It covers basic concepts and introductory principles in set theory, metric spaces, topological and linear spaces, linear functionals and linear operators, and much more. 350 problems. 1970 edition.
Enyeart, Mike; Staman, E. Michael; Valdes, Jose J., Jr.
2007-01-01
The concept of convergence has evolved significantly during recent years. Today, "convergence" refers to the integration of the communications and computing resources and services that seamlessly traverse multiple infrastructures and deliver content to multiple platforms or appliances. Convergence is real. Those in higher education, and especially…
Ulfstjerne, Michael Alexander
Based on ethnographic fieldwork in Ordos China the dissertation ‘Un-real Estate’ traces a local economic boom into its subsequent bust. It gives an account of how state as well as non-state actors appropriate state development schemes and the unintended effects resulting from the colluding forces...
Okonek, Christian
2011-01-01
This article is an expanded version of the talk given by Ch. O. at the Second Latin Congress on "Symmetries in Geometry and Physics" in Curitiba, Brazil in December 2010. In this version we explain the topological and gauge-theoretical aspects of our paper "Abelian Yang-Mills theory on Real tori and Theta divisors of Klein surfaces".
Burnikel, C.; Mehlhorn, K.; Schirra, S.
1996-01-01
We describe the implementation of the LEDA data type {\\bf real}. Every integer is a real and reals are closed under the operations addition, subtraction, multiplication, division and squareroot. The main features of the data type real are \\begin{itemize} \\item The user--interface is similar to that of the built--in data type double. \\item All comparison operators $\\{>, \\geq,
Real Estate Inheritance in Austria
Pirmin Fessler; Peter Mooslechner; Martin Schürz
2010-01-01
As real estate inheritances are an important component of Austrian households’ assets, they are relevant for monetary policymaking and for the maintenance of financial stability. 20% of Austrian households have inherited real estate wealth, with some 2% of all households accounting for around 40% of the overall volume of real estate inheritances in Austria. In aggregate, real estate inheritances constitute up to 23% of households’ total real estate wealth. Households which have inherited diff...
The greater and greater autonomy and complexity asked to the control and command systems lead to work on introducing techniques such as Artificial Intelligence or concurrent object programming in industrial applications. However, while the critical feature of these systems impose to control the dynamics of the proposed solutions, their complexity often imposes a high adaptability to a partially modelled environment. The studies presented start from low level control and command systems to more complex applications at higher levels, such as 'supervision systems'. Techniques such as temporal reasoning and uncertainty management are proposed for the first studies, while the second are tackled with programming techniques based on the real time object paradigm. The outcomes of this itinerary crystallize on the ACCORD project which targets to manage - on the whole life cycle of a real time application - these two problematics, sometimes antagonistic: control of the dynamics and adaptivity. (author)
Choudary, A D R
2014-01-01
The book targets undergraduate and postgraduate mathematics students and helps them develop a deep understanding of mathematical analysis. Designed as a first course in real analysis, it helps students learn how abstract mathematical analysis solves mathematical problems that relate to the real world. As well as providing a valuable source of inspiration for contemporary research in mathematics, the book helps students read, understand and construct mathematical proofs, develop their problem-solving abilities and comprehend the importance and frontiers of computer facilities and much more. It offers comprehensive material for both seminars and independent study for readers with a basic knowledge of calculus and linear algebra. The first nine chapters followed by the appendix on the Stieltjes integral are recommended for graduate students studying probability and statistics, while the first eight chapters followed by the appendix on dynamical systems will be of use to students of biology and environmental scie...
Theoretically calculated values of cohesion force density are compared with their values in real materials. Cohesion at the interface of twin inclusions in niobium at 4.2 K, slip bands in niobium at 77 K, slip bands in niobium oxidized and predeformed at 295 K after cooling down to 77 K, in slip bands of different hardened and tempered steels, at the boundaries of Al99.999 grains - in the process of torsional vibrations at 523 K, have been determined. To calculate cohesion force density and dry friction coefficient a two-member formula of dry friction is used. In all the cases cohesion force density of real materials was below its values calculated theoretically. Excess of yield limit and strengthening curve under compression over yield limit and strengthening curve under tension is explaind as a result of summation and subtraction of external stresses and cohesion forces
Bergstra, J. A.
2011-01-01
Four options for assigning a meaning to Islamic Logic are surveyed including a new proposal for an option named "Real Islamic Logic" (RIL). That approach to Islamic Logic should serve modern Islamic objectives in a way comparable to the functionality of Islamic Finance. The prospective role of RIL is analyzed from several perspectives: (i) parallel distributed systems design, (ii) reception by a community structured audience, (iii) informal logic and applied non-classical logics, and (iv) (in...
Bergstra, Jan Aldert
2011-01-01
Four options for assigning a meaning to Islamic Logic are surveyed including a new proposal for an option named "Real Islamic Logic" (RIL). That approach to Islamic Logic should serve modern Islamic objectives in a way comparable to the functionality of Islamic Finance. The prospective role of RIL is analyzed from several perspectives: (i) parallel distributed systems design, (ii) reception by a community structured audience, (iii) informal logic and applied non-classical logics, and (iv) (in)tractability and artificial intelligence.
CERN. Geneva; ANDERSON, Dustin James; DOGLIONI, Caterina
2015-01-01
The LHC provides experiments with an unprecedented amount of data. Experimental collaborations need to meet storage and computing requirements for the analysis of this data: this is often a limiting factor in the physics program that would be achievable if the whole dataset could be analysed. In this talk, I will describe the strategies adopted by the LHCb, CMS and ATLAS collaborations to overcome these limitations and make the most of LHC data: data parking, data scouting, and real-time analysis.
Real business cycle realizations
Smith, Gregor W.; Stanley E. Zin
1997-01-01
Much recent business cycle research focuses on moments of macroeconomic aggregates. We construct examples of real business cycle sample paths for output, consumption, and employment for the U.S. economy. Annual sample paths are generated from an initial condition in 1925, measured technology and government spending shocks since then, and a standard, calibrated, one-sector model of the business cycle. Quarterly sample paths are generated similarly, from an initial condition in 1955. The law of...
Hayes, Roy; Beling, Peter; Scherer, William
2014-01-01
Real Time Strategy (RTS) games provide complex domain to test the latest artificial intelligence (AI) research. In much of the literature, AI systems have been limited to playing one game. Although, this specialization has resulted in stronger AI gaming systems it does not address the key concerns of AI researcher. AI researchers seek the development of AI agents that can autonomously interpret learn, and apply new knowledge. To achieve human level performance, current AI systems rely on game...
Resuscitating Real Business Cycles
Robert G. King; Sergio T. Rebelo
2000-01-01
The Real Business Cycle (RBC) research program has grown spectacularly over the last decade, as its concepts and methods have diffused into mainstream macroeconomics. Yet, there is increasing skepticism that technology shocks are a major source of business fluctuations. This chapter exposits the basic RBC model and shows that it requires large technology shocks to produce realistic business cycles. While Solow residuals are sufficiently volatile, these imply frequent technological regress. Pr...
Kantorovitz, Shmuel
2016-01-01
This undergraduate textbook is based on lectures given by the author on the differential and integral calculus of functions of several real variables. The book has a modern approach and includes topics such as: •The p-norms on vector space and their equivalence •The Weierstrass and Stone-Weierstrass approximation theorems •The differential as a linear functional; Jacobians, Hessians, and Taylor's theorem in several variables •The Implicit Function Theorem for a system of equations, proved via Banach’s Fixed Point Theorem •Applications to Ordinary Differential Equations •Line integrals and an introduction to surface integrals This book features numerous examples, detailed proofs, as well as exercises at the end of sections. Many of the exercises have detailed solutions, making the book suitable for self-study. Several Real Variables will be useful for undergraduate students in mathematics who have completed first courses in linear algebra and analysis of one real variable.
Evrard, A.; Boulle, N.; Lutfalla, G. S.
Over the past few years there has been a considerable development of DNA amplification by polymerase chain reaction (PCR), and real-time PCR has now superseded conventional PCR techniques in many areas, e.g., the quantification of nucleic acids and genotyping. This new approach is based on the detection and quantification of a fluorescent signal proportional to the amount of amplicons generated by PCR. Real-time detection is achieved by coupling a thermocycler with a fluorimeter. This chapter discusses the general principles of quantitative real-time PCR, the different steps involved in implementing the technique, and some examples of applications in medicine. The polymerase chain reaction (PCR) provides a way of obtaining a large number of copies of a double-stranded DNA fragment of known sequence. This DNA amplification technique, developed in 1985 by K. Mullis (Cetus Corporation), saw a spectacular development over the space of a few years, revolutionising the methods used up to then in molecular biology. Indeed, PCR has many applications, such as the detection of small amounts of DNA, cloning, and quantitative analysis (assaying), each of which will be discussed further below.
Historical evidence is reviewed to show that what Ed Lorenz meant by the iconic phrase ‘the butterfly effect’ is not at all captured by the notion of sensitive dependence on initial conditions in low-order chaos. Rather, as presented in his 1969 Tellus paper, Lorenz intended the phrase to describe the existence of an absolute finite-time predicability barrier in certain multi-scale fluid systems, implying a breakdown of continuous dependence on initial conditions for large enough forecast lead times. To distinguish from ‘mere’ sensitive dependence, the effect discussed in Lorenz's Tellus paper is referred to as ‘the real butterfly effect’. Theoretical evidence for such a predictability barrier in a fluid described by the three-dimensional Navier–Stokes equations is discussed. Whilst it is still an open question whether the Navier–Stokes equation has this property, evidence from both idealized atmospheric simulators and analysis of operational weather forecasts suggests that the real butterfly effect exists in an asymptotic sense, i.e. for initial-time atmospheric perturbations that are small in scale and amplitude compared with (weather) scales of interest, but still large in scale and amplitude compared with variability in the viscous subrange. Despite this, the real butterfly effect is an intermittent phenomenon in the atmosphere, and its presence can be signalled a priori, and hence mitigated, by ensemble forecast methods. (invited article)
Real Parabolic Vector Bundles over a Real Curve
Sanjay Amrutiya
2014-02-01
We define real parabolic structures on real vector bundles over a real curve. Let $(X, _X)$ be a real curve, and let $S\\subset X$ be a non-empty finite subset of such that $_X(S) = S$. Let ≥ 2 be an integer. We construct an -fold cyclic cover : $Y→ X$ in the category of real curves, ramified precisely over each point of , and with the property that for any element of the Galois group , and any $y\\in Y$, one has $_Y(gy) = g^{-1}_Y(y)$. We established an equivalence between the category of real parabolic vector bundles on $(X,_X)$ with real parabolic structure over , all of whose weights are integral multiples of 1/, and the category of real -equivariant vector bundles on $(Y, _Y)$.
National Oceanic and Atmospheric Administration, Department of Commerce — The Ovation Prime Real-Time (OPRT) product is a real-time forecast and nowcast model of auroral power and is an operational implementation of the work by Newell et...
Real- Time Simulation Applications
V. Srinivas
1987-10-01
Full Text Available This paper deals with development of the real-time simulation systems. Two systems, one for supporting the research and development programmes of the aircraft industry and the other to provide pilot training of modem aircraft are described. The presentation brings out the effectiveness of such systems in their respective roles and the techniques developed in the design and realisation of hardware and software.This also gives a overview of various activities which have culminated in the establishment of research simulation facility and training simulators. Also plans of actions and techniques proposed to be employed in terms of future programmes are discussed.
Krantz, Steven G
2013-01-01
Praise for the Second Edition:""The book is recommended as a source for middle-level mathematical courses. It can be used not only in mathematical departments, but also by physicists, engineers, economists, and other experts in applied sciences who want to understand the main ideas of analysis in order to use them to study mathematical models of different type processes.""-Zentralblatt MATH ""The book contains many well-chosen examples and each of the fifteen chapters is followed by almost 500 exercises. … Illustrative pictures are instructive and the design of the book makes reading it a real
Eastwood, S. J.
2007-01-01
Cinema into the Real is the practice of creating an affect based encounter between film and the lived world where their thresholds shift. It is an inquiry into the possibility for navigating what Gilles Deleuze calls the 'not-yet-thoughf brought into existence by an irrational form of cinema comprised of crystalline time-images. How does the schema of normative cinema fiction and documentary stand in for the lived world, and how might the statements, maps and spaces of this cinema be made flu...
Modelling Real Property Transactions
Stubkjær, Erik
2002-01-01
Steudler et al. report on the performance of cadastral systems internationally in Benchmarking Cadastral Systems (1997). The authors met serious difficulties comparing data from different countries, suggesting that more progress had to be made in the definition of concepts and terminology. This...... for more elaborated concept sets - for a theoretical basis - was among the motives for proposing a concerted research project: Modelling Real Property Transactions. Researchers from 11 European countries co-operate in the project that gained status as a COST action as of March 1st 2001. The majority...
Real interest parity decomposition
Alex Luiz Ferreira
2009-09-01
Full Text Available The aim of this paper is to investigate the general causes of real interest rate differentials (rids for a sample of emerging markets for the period of January 1996 to August 2007. To this end, two methods are applied. The first consists of breaking the variance of rids down into relative purchasing power pariety and uncovered interest rate parity and shows that inflation differentials are the main source of rids variation; while the second method breaks down the rids and nominal interest rate differentials (nids into nominal and real shocks. Bivariate autoregressive models are estimated under particular identification conditions, having been adequately treated for the identified structural breaks. Impulse response functions and error variance decomposition result in real shocks as being the likely cause of rids.O objetivo deste artigo é investigar as causas gerais dos diferenciais da taxa de juros real (rids para um conjunto de países emergentes, para o período de janeiro de 1996 a agosto de 2007. Para tanto, duas metodologias são aplicadas. A primeira consiste em decompor a variância dos rids entre a paridade do poder de compra relativa e a paridade de juros a descoberto e mostra que os diferenciais de inflação são a fonte predominante da variabilidade dos rids; a segunda decompõe os rids e os diferenciais de juros nominais (nids em choques nominais e reais. Sob certas condições de identificação, modelos autorregressivos bivariados são estimados com tratamento adequado para as quebras estruturais identificadas e as funções de resposta ao impulso e a decomposição da variância dos erros de previsão são obtidas, resultando em evidências favoráveis a que os choques reais são a causa mais provável dos rids.
Ramón, Hugo Dionisio; Romero, Fernando
2002-01-01
El objetivo de esta línea de investigación es el estudio y desarrollo de aplicaciones que poseen restricciones temporales. Resulta de interés el estudio de diferentes metodologías para la especificación y desarrollo de aplicaciones en tiempo real, así como las plataformas donde dichas aplicaciones pueden ejecutarse. Se trabaja experimentalmente con distintos tipos de hardware y software entre los que pueden mencionarse placas A/D, mini-robots, máquinas multimicroprocesadores y diferentes s...
Construction of the real numbers
Grešak, Rozalija
2013-01-01
In this thesis, there are described two standard constructions of the real numbers, these are the construction of real numbers via Dedekind cuts and the construction with metric fill of the rational numbers. Rational numbers are already a linearly ordered commutative field, so we first list the axioms of a linearly ordered commutative field. Then we take a look to the Dedekind's axiom, which only applies to real numbers and distinguishes between real and rational numbers. In thesis, there are...
Countability of the Real Numbers
Vlahovic, Slavica; Vlahovic, Branislav
2004-01-01
The proofs that the real numbers are denumerable will be shown, i.e., that there exists one-to-one correspondence between the natural numbers $N$ and the real numbers $\\Re$. The general element of the sequence that contains all real numbers will be explicitly specified, and the first few elements of the sequence will be written. Remarks on the Cantor's nondenumerability proofs of 1873 and 1891 that the real numbers are noncountable will be given.
Designing Real Time Assistive Technologies
Sonne, Tobias; Obel, Carsten; Grønbæk, Kaj
2015-01-01
design criteria in relation to three core components (sensing, recognizing, and assisting) for designing real time assistive technologies for children with ADHD. Based on these design criteria, we designed the Child Activity Sensing and Training Tool (CASTT), a real time assistive prototype that captures......) real time assistive technologies have potential to assist children with ADHD in regaining attention in critical school situations....
Einstein's Real "biggest Blunder"
Ellis, Homer G.
2012-10-01
Albert Einstein's real "biggest blunder" was not the 1917 introduction into his gravitational field equations of a cosmological constant term Λ, rather was his failure in 1916 to distinguish between the entirely different concepts of active gravitational mass and passive gravitational mass. Had he made the distinction, and followed David Hilbert's lead in deriving field equations from a variational principle, he might have discovered a true (not a cut and paste) Einstein-Rosen bridge and a cosmological model that would have allowed him to predict, long before such phenomena were imagined by others, inflation, a big bounce (not a big bang), an accelerating expansion of the universe, dark matter, and the existence of cosmic voids, walls, filaments and nodes.
Real time production optimization
Saputelli, Luigi; Otavio, Joao; Araujo, Turiassu; Escorcia, Alvaro [Halliburton, Houston, TX (United States). Landmark Division
2004-07-01
Production optimization encompasses various activities of measuring, analyzing, modeling, prioritizing and implementing actions to enhance productivity of a field. We present a state-of-the-art framework for optimizing production on a continuous basis as new sensor data is acquired in real time. Permanently acquired data is modeled and analyzed in order to create predictive models. A model based control strategy is used to regulate well and field instrumentation. The optimum field operating point, which changes with time, satisfies the maximum economic return. This work is a starting point for further development in automatic, intelligent reservoir technologies which get the most out of the abilities of permanent, instrumented wells and remotely activated downhole completions. The strategy, tested with history-matched data from a compartmentalised giant field, proved to reduce operating costs while increasing oil recovery by 27% in this field. (author)
Askehave, Inger; Holmgreen, Lise-Lotte
2012-01-01
analyses during one specific meeting. An important element of the latter is to assess whether the discussion of our results gives rise to respondents’ reflection, resistance, acceptance, rejection, or indifference, and whether this leads to changes in respondents’ views on culture and organizational...... of research findings may take place to ensure the creation of real-world outcomes for practitioners. The discussion will be centered around the interview study of the discursive constructions of culture in a Danish cross-border company and the possible implications of this for organizational collaboration...... collaboration. This way, we hope to demonstrate that the practical applicability of our findings becomes one of shedding light on potential problems and providing advice (which may be considered an important aim of discourse-based research) instead of making specific recommendations on issues of practice beyond...
Baratella, Stefano
2012-01-01
We study a real valued propositional logic with unbounded positive and negative truth values that we call R-valued logic. Such logic slightly extends continuous propositional logic which, in turn, builds on Lukasiewicz many-valued logic. After presenting the deduction machinery and the semantics of R-valued logic, we prove a completeness theorem for finite theories. Then we define unital and Archimedean theories, in accordance with the theory of Riesz spaces. In the unital setting, we prove the equivalence of consistency and satisfiability and an approximated completeness theorem similar to the one that holds for continuous propositional logic. Eventually, among unital theories, we characterize Archimedean theories as those for which strong completeness holds. We also point out that R-valued logic provides alternative calculi for Lukasiewicz and for propositional continuous logic.
REAL CONVERGENCE AND INTEGRATION
Aurel Iancu
2007-12-01
Full Text Available The study is based on the critical observations that competitive market forces alone are not able to assure convergence with the developed countries. These observations are grounded on the results of the computation of the marginal rate of return to capital (which contradict the neoclassical model hypotheses, as well as on the real process of polarisation of the economic activities, taking place worldwide and in accordance with the law of competition. Unlike those who trust the perfect competitive market virtues, the EU’s economic policy is realistic as it is based on the harmonisation of the market forces with an economic policy based on the principle of cohesion, which supports, by means of economic levers, the less developed regions and member countries. This paper deals with the evolution of the EU cohesion funds, as well as with the results of convergence.
Real convergence and integration
Aurel IANCU
2008-05-01
Full Text Available The study is based on the critical observations that competitive market forces alone are not able to assure convergence with the developed countries. These observations are grounded on the results of the computation of the marginal rate of return to capital (which contradict the neoclassical model hypotheses, as well as on the real process of polarisation of the economic activities, taking place worldwide and in accordance with the law of competition. Unlike those who trust the perfect competitive market virtues, the EU’s economic policy is realistic as it is based on the harmonisation of the market forces with an economic policy based on the principle of cohesion, which supports, by means of economic levers, the less developed regions and member countries. This paper deals with the evolution of the EU cohesion funds, as well as with the results of convergence.
Holmgreen, Lise-Lotte
When working with discourse-based research in professional settings, one question invariably arises: How do we, as researchers, ensure that our findings are taken up by the professionals with whom analyses are carried out, leading to reflections on or even change in their social practices? The...... how the dissemination of research findings may take place to ensure the creation of real-world outcomes for practitioners (cf. e.g. Nørreklit et al. 1987; Puchta & Potter 2004). The presentation will be centered around the interview study of the discursive constructions of culture in a Danish cross......-border software company and the possible implications of these constructions for organizational collaboration. Special attention will be paid to the reflexive processes which took place as we, the researchers, discussed the findings of our analyses with a group of managers, the practitioners, during one specific...
Real Assets and Inflation: Which Real Assets Hedge Inflation
Parajuli, Rajan; Chang, Sun Joseph
2015-01-01
Inflation is considered as a leading macroeconomic indicator, which might create substantial distortions in financial statements, future earnings, and overall performance of securities in the financial market. An inflation-hedging ability of an asset offers protection against inflation, which eliminates or at least reduces the uncertainty about the future real returns. Real assets like real estate, timberland, and farmland have been regarded as good inflation hedges, whereas financial assets ...
UML for real design of embedded real-time systems
Martin, Grant; Selic, Bran
2003-01-01
Models, Software Models and UML.- UML for Real-Time.- Structural Modeling with UML 2.0.- Message Sequence Charts.- UML and Platform-based Design.- UML for Hardware and Software Object Modeling.- Fine Grained Patterns for Real-Time Systems.- Architectural Patterns for Real-Time Systems.- Modeling Quality of Service with UML.- Modeling Metric Time.- Performance Analysis with UML.- Schedulability Analysis with UML.- Automotive UML.- Specifying Telecommunications Systems with UML.- Leveraging UML to Deliver Correct Telecom Applications.- Software Performance Engineering.
Real estate market factors and foreign real estate investment
Hassan Gholipour Fereidouni; Tajul Ariffin Masron
2013-01-01
Purpose – The purpose of this paper is to examine the effects of real estate market factors on foreign real estate investment (FREI). Design/methodology/approach – Applying panel data technique, this paper uses related observations from 31 countries (inclusive of developed countries and emerging market economies) between 2000 and 2008 to investigate the relationships between real estate market factors and FREI. Findings – Controlling for market size, infrastructure and political stability, th...
Tolosa, L; Ca??izares, E.
2002-01-01
Entre los productos que se pueden obtener de la colmena se encuentran la cera, la miel, la jalea real y el prop??leo. Este ??ltimo es una mezcla de composici??n qu??mica compleja que contiene b??lsamos, aceites et??reos, polen, vitaminas, algunos minerales y prote??nas, sustancias que le confieren una variedad de propiedades biol??gicas de gran inter??s para fines terap??uticos. Por esta raz??n en el presente estudio se obtuvieron y caracterizaron extractos etan??licos y acuosos d...
Crespo, Teresa; Hajto, Zbigniew; Sowa, Elzbieta
2012-01-01
The existence of a Picard-Vessiot extension for a homogeneous linear differential equation has been established when the differential field over which the equation is defined has an algebraically closed field of constants. In this paper, we prove the existence of a real Picard-Vessiot extension for a homogeneous linear differential equation defined over a real differential field K with real closed field of constants. We give an adequate definition of the differential Galois group of a Picard-...
BALTIC REAL ESTATE MARKET DYNAMICS
L. Kvedaraviciene
2010-01-01
Real estate market is usually being analysed in terms of supply and demand factors definition and estimation in a certain geographical area at a certain period of time. Moreover, local real estate markets are often being compared with markets of other countries, usually similar in size. Market activity, price dynamics, market maturity are traditionally key factors for real estate market research. The importance and significance of the latter ñ market maturity - suggests to discuss the followi...
Baranouskaya, Vera; Barone Adesi, Giovanni
2010-01-01
Real options refer to the investment, entry, exit and other strategic decisions of the firm that share three important characteristics: they are irreversible, they are made under uncertainty, and their timing is chosen by the firm. The term `real options' was introduced in 1977 by Stewart Myers in his paper `Determinants of corporate borrowing' that related risky debt holdings to the future investment policy of the firm. The literature on real options has since been active and growing with...
Real analysis with economic applications
Ok, Efe A
2011-01-01
There are many mathematics textbooks on real analysis, but they focus on topics not readily helpful for studying economic theory or they are inaccessible to most graduate students of economics. Real Analysis with Economic Applications aims to fill this gap by providing an ideal textbook and reference on real analysis tailored specifically to the concerns of such students. The emphasis throughout is on topics directly relevant to economic theory. In addition to addressing the usual topics of real analysis, this book discusses the elements of order theory, convex analysis, optimizatio
An introduction to real analysis
Ball, Derek G
1973-01-01
An Introduction to Real Analysis presents the concepts of real analysis and highlights the problems which necessitate the introduction of these concepts. Topics range from sets, relations, and functions to numbers, sequences, series, derivatives, and the Riemann integral. This volume begins with an introduction to some of the problems which are met in the use of numbers for measuring, and which provide motivation for the creation of real analysis. Attention then turns to real numbers that are built up from natural numbers, with emphasis on integers, rationals, and irrationals. The chapters tha
Farrell, Diana
2003-10-01
During the soar-and-swoon days of the late 1990s, many people believed that information technology, and the Internet in particular, were "changing everything" in business. A fundamental change did happen in the 1990s, but it was less about technology than about competition. Under director Diana Farrell, the McKinsey Global Institute has conducted an extensive study of productivity and its connection to corporate IT spending and use during that period. The study revealed that information technology is important--but not central--to the fate of industries and individual companies. So if information technology was not the primary factor in the productivity surge, what was? The study points to competition and innovation. In those industries that saw increases in competitive intensity, managers were forced to innovate aggressively to protect their revenues and profits. Those innovations--in products, business practices, and technology--led to the gains in productivity. In fact, a critical dynamic of the new economy--the real new economy--is the virtuous cycle of competition, innovation, and productivity growth. Managers can innovate in many ways, but during the 1990s, information technology was a particularly powerful tool, for three reasons: First, IT enabled the development of attractive new products and efficient new business processes. Second, it facilitated the rapid industrywide diffusion of innovations. And third, it exhibited strong scale economies--its benefits multiplied rapidly as its use expanded. This article reveals surprising data on how various industries in the United States and Europe were affected by competition, innovation, and information technology in the 1990s and offers insights about how managers can get more from their IT investments. PMID:14521102
Brice Corgnet; Roberto Hernán-González; Stephen Rassenti
2011-01-01
We propose a novel approach to the analysis of organizations by developing a computerized platform that reproduces relevant features of existing organizations such as real-effort tasks and real-leisure alternative activities (Internet). In this environment, we find strong incentives effects as organizations using individual incentives significantly outperform those relying on team incentives. Combining real-time peer monitoring with team incentives, we report striking evidence of positive pee...
Engel, Klaus; Kniss, Joe; Rezk-Salama, Christof; Weiskopf, Daniel
2006-01-01
Based on course notes of SIGGRAPH course teaching techniques for real-time rendering of volumetric data and effects; covers both applications in scientific visualization and real-time rendering. Starts with the basics (texture-based ray casting) and then improves and expands the algorithms incrementally. Book includes source code, algorithms, diagrams, and rendered graphics.
Doing Real Estate Business Overseas
无
2007-01-01
@@ When we saw the amount of foreign capital currently being invested in China's real estate market,we realized that much like its foreign counterparts,China has been very active overseas as well.With encouragement from the"walking out"strategy,more and more Vhinese investors have begun to focus on overseas real estate developments.
Real Orientations, Real Gromov-Witten Theory, and Real Enumerative Geometry
Georgieva, Penka
2015-01-01
The present note overviews our recent construction of real Gromov-Witten theory in arbitrary genera for many real symplectic manifolds, including the odd-dimensional projective spaces and the renowned quintic threefold, its properties, and its connections with real enumerative geometry. Our construction introduces the principle of orienting the determinant of a differential operator relative to a suitable base operator and a real setting analogue of the (relative) spin structure of open Gromov-Witten theory. Orienting the relative determinant, which in the now-standard cases is canonically equivalent to orienting the usual determinant, is naturally related to the topology of vector bundles in the relevant category. This principle and its applications allow us to endow the uncompactified moduli spaces of real maps from symmetric surfaces of all topological types with natural orientations and to verify that they extend across the codimension-one boundaries of these spaces, thus implementing a far-reaching propo...
An Industry Profile of Corporate Real Estate
Linda L. Johnson; Terry Keasler; Stellan Lundstrom
1993-01-01
Corporate real estate is increasingly becoming an area of emphasis for real estate professionals and academics, particularly in asset management. Using balance sheet data on real estate corporate holdings, total assets, and firm marketing values from 1984-1991, this article provides an analysis of real estate holdings both by industry sector and asset subtype. Industry rank order by gross value of total real estate holdings and asset subtype, real estate as a percent of assets, and real estat...
Analysing UK real estate market forecast disagreement
McAllister, Patrick (Hrsg.); Newell, G.; Matysiak, George
2005-01-01
Given the significance of forecasting in real estate investment decisions, this paper investigates forecast uncertainty and disagreement in real estate market forecasts. Using the Investment Property Forum (IPF) quarterly survey amongst UK independent real estate forecasters, these real estate forecasts are compared with actual real estate performance to assess a number of real estate forecasting issues in the UK over 1999-2004, including real estate forecast error, bias and consensus. The r...
Real Estate Development, Highest and Best Use and Real Options
Marina Bravi
2013-08-01
Full Text Available The primary aim of this work is to connect the Real Options Theory (ROT with the real estate investment framework. A great deal of theoretical work exist today; it begun with Merton (1973 and Black & Sholes (1973 and provided new insights into capital budgeting decision-making and new models, used today by corporate managers and practitioners too. Unfortunately, the ROT is not widely used by appraisers respect to the traditional DCF model, even though the developers behaviour gives evidence to the model. It is important to remember that the real estate investments are characterized by irreversible decision and by various sources of risk and uncertainty about future returns, especially when the development process is very long. The flexibility in the real estate investment is related to the alternative uses embedded in the land – traditionally interpreted through the Highest and Best Use approach – and to the characteristics of the building. In fact, the value of vacant land should reflect not only the value based on best immediate use, but also its option value, if the development is delayed and the land is converted into best alternative use in the future. This is also true for the redeveloped urban lands. In brief, this work shows the limits of the traditional analysis (Discounted Cash Flow Model to capture flexibility in the real estate investment and presents an application – an industrial urban area – implemented by the real option approach within a backward risk-neutral valuation process.
Quantifying randomness in real networks
Orsini, Chiara; Dankulov, Marija M.; Colomer-de-Simón, Pol; Jamakovic, Almerima; Mahadevan, Priya; Vahdat, Amin; Bassler, Kevin E.; Toroczkai, Zoltán; Boguñá, Marián; Caldarelli, Guido; Fortunato, Santo; Krioukov, Dmitri
2015-10-01
Represented as graphs, real networks are intricate combinations of order and disorder. Fixing some of the structural properties of network models to their values observed in real networks, many other properties appear as statistical consequences of these fixed observables, plus randomness in other respects. Here we employ the dk-series, a complete set of basic characteristics of the network structure, to study the statistical dependencies between different network properties. We consider six real networks--the Internet, US airport network, human protein interactions, technosocial web of trust, English word network, and an fMRI map of the human brain--and find that many important local and global structural properties of these networks are closely reproduced by dk-random graphs whose degree distributions, degree correlations and clustering are as in the corresponding real network. We discuss important conceptual, methodological, and practical implications of this evaluation of network randomness, and release software to generate dk-random graphs.
Strange functions in real analysis
Kharazishvili, AB
2005-01-01
Weierstrass and Blancmange nowhere differentiable functions, Lebesgue integrable functions with everywhere divergent Fourier series, and various nonintegrable Lebesgue measurable functions. While dubbed strange or "pathological," these functions are ubiquitous throughout mathematics and play an important role in analysis, not only as counterexamples of seemingly true and natural statements, but also to stimulate and inspire the further development of real analysis.Strange Functions in Real Analysis explores a number of important examples and constructions of pathological functions. After introducing the basic concepts, the author begins with Cantor and Peano-type functions, then moves to functions whose constructions require essentially noneffective methods. These include functions without the Baire property, functions associated with a Hamel basis of the real line, and Sierpinski-Zygmund functions that are discontinuous on each subset of the real line having the cardinality continuum. Finally, he considers e...
Dyer, R H
2014-01-01
The purpose of this book is to provide an integrated course in real and complex analysis for those who have already taken a preliminary course in real analysis. It particularly emphasises the interplay between analysis and topology. Beginning with the theory of the Riemann integral (and its improper extension) on the real line, the fundamentals of metric spaces are then developed, with special attention being paid to connectedness, simple connectedness and various forms of homotopy. The final chapter develops the theory of complex analysis, in which emphasis is placed on the argument, the winding number, and a general (homology) version of Cauchy's theorem which is proved using the approach due to Dixon. Special features are the inclusion of proofs of Montel's theorem, the Riemann mapping theorem and the Jordan curve theorem that arise naturally from the earlier development. Extensive exercises are included in each of the chapters, detailed solutions of the majority of which are given at the end. From Real to...
Patent Valuation and Real Options
Deger Alper
2011-01-01
Full Text Available As the knowledge economics grows rapidly, businesses increasingly invest intellectual property and the value of intellectual property; patent, trademark, copyright etc., more emphasized in business nowadays. Thus, the valuation of intellectual property, specifically patents, has been one of the most difficult investment problems both for practitioners and academics. Traditional valuation methods fail to account for the unique characteristics of patents; uncertainty and management flexibility. Patents are option-like assets that give the owner a bundle of options; to commercialize the products, to file foreign application, to license the innovation etc. Real options represent the application of options methodology to strategic business decisions, and real option method provides a richer framework to analyse the issues that confront the valuation of patent. This paper uses real option model as a framework to correctly evaluate patent and contains real option model application to patent valuation.
Adjusted Period for Real Estate
无
2007-01-01
@@ The Chinese real estate market has seen sustained prosperity for the last 10 years, but the climbing price of housing has made everyone begin to question whether this industry is overheated or if there is a bubble ready to burst.
SATDA Real Estate Division Launches
Rob Emerick
2008-01-01
<正>Hello Readers, I am happy to announce the new real estate section for this magazine,called"America is For Sale".This section will focus on current and important issues regarding the real estate industry within the United States of America.There has been a great deal of interest in the American real estate market from Chinese investors lately.The weak US dollar and strong Chinese renminbi alone make the US market attractive to Chinese investors.Now,with the US in the bottom of a real estate cycle,property is amazingly inexpensive.Many foreign investors are buying as much as they can because the investors understand this is the best time to buy:at the bottom of a cycle.
Ratcliffe, John
1997-01-01
This paper seeks to establish a framework for studying real estate futures. In doing so, it explores the general climate of change within which property decisions will have to be made, and examines the specific real estate opportunities that might emerge as a result of that change. For the purpose of appraisal, the forces of change are grouped into six sectors - cultural, demographic, economic, environmental, governmental and technological. Property perspectives are then portrayed for each of...
Periods and elementary real numbers
Yoshinaga, Masahiko
2008-01-01
The periods, introduced by Kontsevich and Zagier, form a class of complex numbers which contains all algebraic numbers and several transcendental quantities. Little has been known about qualitative properties of periods. In this paper, we compare the periods with hierarchy of real numbers induced from computational complexities. In particular we prove that periods can be effectively approximated by elementary rational Cauchy sequences. As an application, we exhibit a computable real number wh...
2010-01-01
... 15 Commerce and Foreign Trade 3 2010-01-01 2010-01-01 false Real estate. 806.8 Section 806.8... ECONOMIC ANALYSIS, DEPARTMENT OF COMMERCE DIRECT INVESTMENT SURVEYS § 806.8 Real estate. Residential real..., is considered real estate held for personal use. Ownership of residential real estate by...
Johnson, R.; Hernandez, J.E.; Lu, Shin-yee [Lawrence Livermore National Lab., CA (United States)
1994-11-15
Many industrial and defence applications require an ability to make instantaneous decisions based on sensor input of a time varying process. Such systems are referred to as `real-time systems` because they process and act on data as it occurs in time. When a vision sensor is used in a real-time system, the processing demands can be quite substantial, with typical data rates of 10-20 million samples per second. A real-time Machine Vision Laboratory (MVL) was established in FY94 to extend our years of experience in developing computer vision algorithms to include the development and implementation of real-time vision systems. The laboratory is equipped with a variety of hardware components, including Datacube image acquisition and processing boards, a Sun workstation, and several different types of CCD cameras, including monochrome and color area cameras and analog and digital line-scan cameras. The equipment is reconfigurable for prototyping different applications. This facility has been used to support several programs at LLNL, including O Division`s Peacemaker and Deadeye Projects as well as the CRADA with the U.S. Textile Industry, CAFE (Computer Aided Fabric Inspection). To date, we have successfully demonstrated several real-time applications: bullet tracking, stereo tracking and ranging, and web inspection. This work has been documented in the ongoing development of a real-time software library.
Some properties of fuzzy real numbers
Bayaz Daraby
2016-02-01
In this study, we try to prove Bernoulli's inequality in fuzzy real numbers with some of its applications. Also, we prove two other theorems in fuzzy real numbers which are proved before, for real numbers.
A real-world way to manage real options.
Copeland, Tom; Tufano, Peter
2004-03-01
Each corporate growth project is an option, in the sense that managers face choices--push ahead or pull back--along the way. Yet many companies hesitate to apply options theory to initiatives such as R&D and geographic expansion, partly because these "real" options are highly complex. In this article, the authors make the case that the complexity of real options can be eased through the use of a binomial valuation model. Many of the problems with real-options analysis stem from the use of the Black-Scholes-Merton model, which isn't suited to real options. Binomial models, by contrast, are simpler mathematically, and you can tinker with a binomial model until it closely reflects the project you wish to value. Suppose your company is considering investing in a new plant. To use the binomial model, you must create an "event tree" to figure out the full range of possible values for the plant during the project's lifetime--next year, at the end of the design phase, upon completion. Then you work backward from the value at completion, factoring in the various investments, to determine the value of the project today. These calculations provide you with numbers for all the possible future values of the option at the various points where a decision needs to be made on whether to continue with the project. The authors also address another criticism of real options: that gaps often arise between theoretical and realized values of options of all types. Such gaps may be largely the result of managers exercising options at the wrong time. To improve the way it manages its real options, a company can look out for the decision trigger points that correspond to the nodes on a binomial decision tree. The trigger points should not only tell managers when they need to decide on exercise but also specify rules governing the exercise decisions. PMID:15029793
Corporate Real Estate and Stock Market Performance
Kim Hiang Liow
2004-01-01
An interesting question in corporate real estate literature is whether real estate can improve the stock market performance of "property-intensive" non-real estate firms. Using a data set comprising 75 non-real estate corporations that own at least 20 percent properties, this paper empirically assesses and compares the pair-wise return, total risk, systematic risk and Jensen abnormal return performance of "composite" (with real estate) and hypothetical "business" (without real estate) firms. ...
Making real options really work.
van Putten, Alexander B; MacMillan, Ian C
2004-12-01
As a way to value growth opportunities, real options have had a difficult time catching on with managers. Many CFOs believe the method ensures the overvaluation of risky projects. This concern is legitimate, but abandoning real options as a valuation model isn't the solution. Companies that rely solely on discounted cash flow (DCF) analysis underestimate the value of their projects and may fail to invest enough in uncertain but highly promising opportunities. CFOs need not--and should not--choose one approach over the other. Far from being a replacement for DCF analysis, real options are an essential complement, and a project's total value should encompass both. DCF captures a base estimate of value; real options take into account the potential for big gains. This is not to say that there aren't problems with real options. As currently applied, they focus almost exclusively on the risks associated with revenues, ignoring the risks associated with a project's costs. It's also true that option valuations almost always ignore assets that an initial investment in a subsequently abandoned project will often leave the company. In this article, the authors present a simple formula for combining DCF and option valuations that addresses these two problems. Using an integrated approach, managers will, in the long run, select better projects than their more timid competitors while keeping risk under control. Thus, they will outperform their rivals in both the product and the capital markets. PMID:15605572
Bross, Benjamin; Alvarez-Mesa, Mauricio; George, Valeri; Chi, Chi Ching; Mayer, Tobias; Juurlink, Ben; Schierl, Thomas
2013-09-01
The new High Efficiency Video Coding Standard (HEVC) was finalized in January 2013. Compared to its predecessor H.264 / MPEG4-AVC, this new international standard is able to reduce the bitrate by 50% for the same subjective video quality. This paper investigates decoder optimizations that are needed to achieve HEVC real-time software decoding on a mobile processor. It is shown that HEVC real-time decoding up to high definition video is feasible using instruction extensions of the processor while decoding 4K ultra high definition video in real-time requires additional parallel processing. For parallel processing, a picture-level parallel approach has been chosen because it is generic and does not require bitstreams with special indication.
Complex analogues of real problems
Esdahl-Schou, Rune
. Using geometrical interpretations we construct sets with properties similar to the sets considered in the real case. We then formulate a conjecture which can be interpreted as a complex version of Schmidt's original conjecture. Finally we construct a variant of Schmidt's game, to show a partial result......This thesis will be a mix of different problems in number theory. As such it is split into two natural parts. The rst part focuses on normal numbers and construction of numbers that are normal to a given complex base. It is written in the style of a thorough and introductory paper on that subject......, Pollington and Velani, and inspired by this An gave a different proof which provides a stronger result. The conjecture is concerned with intersections of certain sets in the plane and are as such a real problem. We will consider a slightly different setup where the real plane is replaced by the complex plane...
Percolation in real interdependent networks
Radicchi, Filippo
2015-01-01
The function of a real network depends not only on the reliability of its own components, but is affected also by the simultaneous operation of other real networks coupled with it. Robustness of systems composed of interdependent network layers has been extensively studied in recent years. However, the theoretical frameworks developed so far apply only to special models in the limit of infinite sizes. These methods are therefore of little help in practical contexts, given that real interconnected networks have finite size and their structures are generally not compatible with those of graph toy models. Here, we introduce a theoretical method that takes as inputs the adjacency matrices of the layers to draw the entire phase diagram for the interconnected network, without the need of actually simulating any percolation process. We demonstrate that percolation transitions in arbitrary interdependent networks can be understood by decomposing these system into uncoupled graphs: the intersection among the layers, a...
Establishment Reality vs. Maintenance Reality: How Real Is Real Enough?
Lindsay, E. D.; Murray, S.; Liu, D. K.; Lowe, D. B.; Bright, C. G.
2009-01-01
Remote and virtual laboratories are increasingly prevalent alternatives to the face-to-face laboratory experience; however, the question of their learning outcomes is yet to be fully investigated. There are many presumptions regarding the effectiveness of these approaches; foremost amongst these assumptions is that the experience must be "real" to…
Real-World Solutions for Real-World Collaboration Problems
Macklin, Alexius Smith; Fosmire, Michael
2003-01-01
Are you finding collaboration with faculty difficult to initiate? How about a new approach? Problem-based learning (PBL) is an instruction method that investigates and resolves messy, real-world dilemmas. This workshop demonstrates how librarians at Purdue University worked with faculty to incorporate information literacy skills into course content using PBL.
Elementary real and complex analysis
Shilov, Georgi E
1996-01-01
In this book the renowned Russian mathematician Georgi E. Shilov brings his unique perspective to real and complex analysis, an area of perennial interest in mathematics. Although there are many books available on the topic, the present work is specially designed for undergraduates in mathematics, science and engineering. A high level of mathematical sophistication is not required.The book begins with a systematic study of real numbers, understood to be a set of objects satisfying certain definite axioms. The concepts of a mathematical structure and an isomorphism are introduced in Chapter 2,
Real Analysis A Historical Approach
Stahl, Saul
2011-01-01
A provocative look at the tools and history of real analysis This new edition of Real Analysis: A Historical Approach continues to serve as an interesting read for students of analysis. Combining historical coverage with a superb introductory treatment, this book helps readers easily make the transition from concrete to abstract ideas. The book begins with an exciting sampling of classic and famous problems first posed by some of the greatest mathematicians of all time. Archimedes, Fermat, Newton, and Euler are each summoned in turn, illuminating the utility of infinite, power, and trigonome
MATRIX FORMULATION OF REAL QUATERNIONS
Jafari, Mehdi
2015-01-01
Real quaternions have been expressed in terms of 4×4 matrices by means of Hamilton operators. These matrices are applied for rotations in Euclidean 4-space, and are determined also a Hamilton motions in E4. We study these matrices and show that the set of these matrices with the group operation of matrix multiplication is Lie group of 6-dimension.
Percolation in real interdependent networks
Radicchi, Filippo
2015-07-01
The function of a real network depends not only on the reliability of its own components, but is affected also by the simultaneous operation of other real networks coupled with it. Whereas theoretical methods of direct applicability to real isolated networks exist, the frameworks developed so far in percolation theory for interdependent network layers are of little help in practical contexts, as they are suited only for special models in the limit of infinite size. Here, we introduce a set of heuristic equations that takes as inputs the adjacency matrices of the layers to draw the entire phase diagram for the interconnected network. We demonstrate that percolation transitions in interdependent networks can be understood by decomposing these systems into uncoupled graphs: the intersection among the layers, and the remainders of the layers. When the intersection dominates the remainders, an interconnected network undergoes a smooth percolation transition. Conversely, if the intersection is dominated by the contribution of the remainders, the transition becomes abrupt even in small networks. We provide examples of real systems that have developed interdependent networks sharing cores of `high quality’ edges to prevent catastrophic failures.
Lagoa Real design - Mineral engineering
This paper presents the works realized, in course and to realize of Lagoa Real Design, including the works for implantation of Mineral-Industrial complex with the production capacity of 1.000 ton of U sub(3) O sub(8) per year from 1988. (author)
Trento, Stefano; Götzen, Amalia De
2011-01-01
This paper is an initial attempt to study the world of sound effects for motion pictures, also known as Foley sounds. Throughout several audio and audio-video tests we have compared both Foley and real sounds originated by an identical action. The main purpose was to evaluate if sound effects are...... applications of sound design such as advertisement or soundtracks for movies....
Parker, Tom
2012-01-01
As a fifth-grade mathematics teacher, the author tries to create authentic problem-solving activities that connect to the world in which his students live. He discovered a natural connection to his students' real world at a computer camp. A friend introduced him to Alice, a computer application developed at Carnegie Mellon, under the leadership of…
Lagoa Real complex - implementation program
The description of the activities from the Lagoa Real Complex is presented, including the development of a complementation process with available drill core samples and drilling an evaluation Cachoeira Deposit. Studies already developed indicate that Cachoeira Deposit has about 70 ton of U3O8 per meter of depth. (author)
Black, Darren; Clemmensen, Nils Jakob; Skov, Mikael B.
2009-01-01
Shopping in the real world is becoming an increasingly interactive experience as stores integrate various technologies to support shoppers. Based on an empirical study of supermarket shoppers, we designed a mobile context-aware system called the Context- Aware Shopping Trolley (CAST). The aim of ...
Some properties of fuzzy real numbers
Bayaz Daraby; Javad Jafari
2016-01-01
In the mathematical analysis, there are some theorems and definitions that established for both real and fuzzy numbers. In this study, we try to prove Bernoulli's inequality in fuzzy real numbers with some of its applications. Also, we prove two other theorems in fuzzy real numbers which are proved before, for real numbers.
Carvalho, Ivo S., E-mail: ivoc@ipfn.ist.utl.pt; Duarte, Paulo; Fernandes, Horácio; Valcárcel, Daniel F.; Carvalho, Pedro J.; Silva, Carlos; Duarte, André S.; Neto, André; Sousa, Jorge; Batista, António J.N.; Hekkert, Tiago; Carvalho, Bernardo B.
2014-03-15
Highlights: • All real-time diagnostics and actuators were integrated in the same control platform. • A 100 μs control cycle was achieved under the MARTe framework. • Time-windows based control with several event-driven control strategies implemented. • AC discharges with exception handling on iron core flux saturation. • An HTML discharge configuration was developed for configuring the MARTe system. - Abstract: The ISTTOK tokamak was upgraded with a plasma control system based on the Advanced Telecommunications Computing Architecture (ATCA) standard. This control system was designed to improve the discharge stability and to extend the operational space to the alternate plasma current (AC) discharges as part of the ISTTOK scientific program. In order to accomplish these objectives all ISTTOK diagnostics and actuators relevant for real-time operation were integrated in the control system. The control system was programmed in C++ over the Multi-threaded Application Real-Time executor (MARTe) which provides, among other features, a real-time scheduler, an interrupt handler, an intercommunications interface between code blocks and a clearly bounded interface with the external devices. As a complement to the MARTe framework, the BaseLib2 library provides the foundations for the data, code introspection and also a Hypertext Transfer Protocol (HTTP) server service. Taking advantage of the modular nature of MARTe, the algorithms of each diagnostic data processing, discharge timing, context switch, control and actuators output reference generation, run on well-defined blocks of code named Generic Application Module (GAM). This approach allows reusability of the code, simplified simulation, replacement or editing without changing the remaining GAMs. The ISTTOK control system GAMs run sequentially each 100 μs cycle on an Intel{sup ®} Q8200 4-core processor running at 2.33 GHz located in the ATCA crate. Two boards (inside the ATCA crate) with 32 analog
Highlights: • All real-time diagnostics and actuators were integrated in the same control platform. • A 100 μs control cycle was achieved under the MARTe framework. • Time-windows based control with several event-driven control strategies implemented. • AC discharges with exception handling on iron core flux saturation. • An HTML discharge configuration was developed for configuring the MARTe system. - Abstract: The ISTTOK tokamak was upgraded with a plasma control system based on the Advanced Telecommunications Computing Architecture (ATCA) standard. This control system was designed to improve the discharge stability and to extend the operational space to the alternate plasma current (AC) discharges as part of the ISTTOK scientific program. In order to accomplish these objectives all ISTTOK diagnostics and actuators relevant for real-time operation were integrated in the control system. The control system was programmed in C++ over the Multi-threaded Application Real-Time executor (MARTe) which provides, among other features, a real-time scheduler, an interrupt handler, an intercommunications interface between code blocks and a clearly bounded interface with the external devices. As a complement to the MARTe framework, the BaseLib2 library provides the foundations for the data, code introspection and also a Hypertext Transfer Protocol (HTTP) server service. Taking advantage of the modular nature of MARTe, the algorithms of each diagnostic data processing, discharge timing, context switch, control and actuators output reference generation, run on well-defined blocks of code named Generic Application Module (GAM). This approach allows reusability of the code, simplified simulation, replacement or editing without changing the remaining GAMs. The ISTTOK control system GAMs run sequentially each 100 μs cycle on an Intel® Q8200 4-core processor running at 2.33 GHz located in the ATCA crate. Two boards (inside the ATCA crate) with 32 analog
Real convergence in the European Union
Veiga, Francisco José
2000-01-01
This essay deals with real convergence in the European Union (EU). Real convergence is here defined as convergence of GDP per capita in Purchasing Power Standard. I examine whether there is empirical evidence of real convergence among EU countries or regions and if the current effort towards nominal convergence has slowed real convergence. The main findings are that there has been some real convergence at the country level, mainly before the mid- 1970s, but not much evidence of...
Real time psychrometric data collection
Eight Mine Weather Stations (MWS) installed at the Waste Isolation Pilot Plant (WIPP) to monitor the underground ventilation system are helping to simulate real-time ventilation scenarios. Seasonal weather extremes can result in variations of Natural Ventilation Pressure (NVP) which can significantly effect the ventilation system. The eight MWS(s) (which previously collected and stored temperature, barometric pressure and relative humidity data for subsequent NVP calculations) were upgraded to provide continuous real-time data to the site wide Central monitoring System. This data can now be utilized by the ventilation engineer to create realtime ventilation simulations and trends which assist in the prediction and mitigation of NVP and psychrometric related events
Observability transition in real networks
Yang, Yang
2016-01-01
We consider the observability model in networks with arbitrary topologies. We introduce a system of coupled nonlinear equations, valid under the locally tree-like ansatz, to describe the size of the largest observable cluster as a function of the fraction of directly observable nodes present in the network. We perform a systematic analysis on 95 real-world graphs and compare our theoretical predictions with numerical simulations of the observability model. Our method provides almost perfect predictions in the majority of the cases, even for networks with very large values of the clustering coefficient. Potential applications of our theory include the development of efficient and scalable algorithms for real-time surveillance of social networks, and monitoring of technological networks.
Ernest Hamsag
2015-01-01
Having defined what inflation is, this study proposes some hypothesizes to eliminate external and psychological factors; it also examines a closed economy. It shows that the deep cause of inflation is the out of balance relation between consumption expenditure and saving. If consumption expenditure increases more than saving, the result is an inflation of the real economy. If saving increase to the prejudice of consumption expenditure, the financial markets are undergoing inflation. The main ...
Real Time Network Traffic Monitoring
Tripp, Gerald
1999-01-01
This paper looks at the problems of real time network traffic monitoring. Some of the existing approaches are reviewed, looking at both simple filtering systems and also systems based on the use of finite state machines that can report specific events or capture data only when in particular states. Finally, some existing implementation techniques are examined and an outline proposal made for the design of a network monitoring system that uses finite state machines implemented using associativ...
[Real time 3D echocardiography
Bauer, F.; Shiota, T.; Thomas, J. D.
2001-01-01
Three-dimensional representation of the heart is an old concern. Usually, 3D reconstruction of the cardiac mass is made by successive acquisition of 2D sections, the spatial localisation and orientation of which require complex guiding systems. More recently, the concept of volumetric acquisition has been introduced. A matricial emitter-receiver probe complex with parallel data processing provides instantaneous of a pyramidal 64 degrees x 64 degrees volume. The image is restituted in real time and is composed of 3 planes (planes B and C) which can be displaced in all spatial directions at any time during acquisition. The flexibility of this system of acquisition allows volume and mass measurement with greater accuracy and reproducibility, limiting inter-observer variability. Free navigation of the planes of investigation allows reconstruction for qualitative and quantitative analysis of valvular heart disease and other pathologies. Although real time 3D echocardiography is ready for clinical usage, some improvements are still necessary to improve its conviviality. Then real time 3D echocardiography could be the essential tool for understanding, diagnosis and management of patients.
Sistemas de tiempo real y sistemas distribuidos de tiempo real
Pesado, Patricia; Ramón, Hugo Dionisio; Boracchia, Marcos; Pasini, Ariel C.; De Vito, María Cecilia; Osella Massa, Germán Leandro; Estrebou, César
2006-01-01
El proyecto de investigación y desarrollo en Sistemas de Software Distribuido, abarca aspectos que van desde los fundamentos del desarrollo (Técnicas de Ingeniería de Requerimientos, Metodologías de Gestión y Desarrollo de Proyectos, Técnicas de Planificación, Métricas, Normas de Calidad, Web-Systems) hasta la concepción de aplicaciones específicas orientadas a los procesos industriales (Sistemas de Planeamiento de Producción, Control Industrial en tiempo real), procesos de E-government (Voto...
Real Estate Risk and Exposure of Banking Institutions to Real Estate
S.E. Ong; M. Khairul; M.Faishal Ibrahim; L.Thi Thanh Thao
2013-01-01
Analyzing the real estate risk sensitivity of GCC banking institutions, we found that both real estate loan and equity exposure of conventional and Islamic banks positively increases its real estate beta risk. The results persist across different subsamples. As expected, the effect is more persistent during time periods when bank's real estate exposure is elevated. Generally, due to the greater real estate exposure of Islamic banks, they possess greater real estate beta risk than conventional...
Museo Palazzo Ricci - Più reale del reale
Stefano Ciocchetti
2014-06-01
Full Text Available Può una realtà virtuale diventare un’esperienza più concreta di quella reale?Sembra di si osservando il lavoro di Tesi di Stefano Ciocchetti.In questo articolo si illustrano le fasi di lavorazione che hanno portato alla riproduzione digitale degli ambienti e delle opere esposte nel Museo Palazzo Ricci di Macerata, tra i più importanti per quel che riguarda l’arte italiana del ‘900. La riproduzione digitale è avvenuta attuando diverse tecniche di ripresa, che hanno reso possibile la navigazione virtuale all’interno del Museo e l’interazione con le opere d’arte presenti, simulando un’esperienza assimilabile a quella reale ed offre, inoltre, possibilità di fruizione che vanno oltre un’esperienza concreta.Questo grazie alle tecniche di ripresa utilizzate, come l’alta definizione che permette di osservare particolari di opere non visibili ad occhio nudo o la modellazione 3d che permette di osservare le sculture attraverso punti di vista differenti.
Ultimatum salary bargaining with real effort
García-Gallego, Aurora; Georgantzis, Nikos; Jaramillo-Gutiérrez, Ainhoa
2008-01-01
We report experimental results on ultimatum salary bargaining with a real task performed by employee subjects. Compared to the baseline treatment with a hypothetical task, the introduction of a real task raises offers, accepted wages and rejection rates.
Is Non-Celiac Gluten Sensitivity Real?
... gov/news/fullstory_160153.html Is Non-Celiac Gluten Sensitivity Real? Study finds distinctly different biological changes ... 29, 2016 FRIDAY, July 29, 2016, (HealthDay News) -- Gluten sensitivity appears to be a real medical problem, ...
Multidimensional real analysis I differentiation
Duistermaat, J J; van Braam Houckgeest, J P
2004-01-01
Part one of the authors' comprehensive and innovative work on multidimensional real analysis. This book is based on extensive teaching experience at Utrecht University and gives a thorough account of differential analysis in multidimensional Euclidean space. It is an ideal preparation for students who wish to go on to more advanced study. The notation is carefully organized and all proofs are clean, complete and rigorous. The authors have taken care to pay proper attention to all aspects of the theory. In many respects this book presents an original treatment of the subject and it contains man
Definability in the Real Universe
Cooper, S. Barry
2011-01-01
Logic has its origins in basic questions about the nature of the real world and how we describe it. This article seeks to bring out the physical and epistemological relevance of some of the more recent technical work in logic and computability theory. "If you are receptive and humble, mathematics will lead you by the hand. Again and again, when I have been at a loss how to proceed, I have just had to wait until I have felt the mathematics lead me by the hand. It has led me along an unexpected...
Real time automatic scene classification
Israël, Menno; Broek, van den, Wouter; Putten, van, M.J.A.M.; Uyl, den, T.M.; Verbrugge, R.; Taatgen, N.; Schomaker, L.
2004-01-01
This work has been done as part of the EU VICAR (IST) project and the EU SCOFI project (IAP). The aim of the first project was to develop a real time video indexing classification annotation and retrieval system. For our systems, we have adapted the approach of Picard and Minka [3], who categorized elements of a scene automatically with so-called ’stuff’ categories (e.g., grass, sky, sand, stone). Campbell et al. [1] use similar concepts to describe certain parts of an image, which they named...
Perry, John
2006-01-01
My main aim in this talk is to discuss McTaggart’s argument for the unreality of time. I will ?nd a ?aw in his argument, but ?nding the ?aw will lead us to the conclusion that although time is real, future events are not. I will begin, however, not with McTaggart, but with a version of an ancient argument for fatalism. By fatalism I do not mean the doctrine that we are fated, like Oedipus, to do something terrible at some point in the future, no matter what choices we make now, and no matter ...
CERN: Real and imaginary parts
Full text: Elastic scattering (where particles bounce off each other) has implications which go far beyond the deceptive simplicity and inconsequence of this process. Several years ago, an elastic scattering result by the UA4 experiment at CERN's proton-antiproton collider (January 1988, page 32) set the high energy world talking. In quantum mechanics, the forward elastic scattering amplitude is a complex number whose real and imaginary parts can be related. The powerful 'optical theorem' relates the total reaction rate (cross-section) to the imaginary part of the forward scattering amplitude, while the ratio of the real and imaginary parts gives an indication of where the total reaction rate is going at higher energies, independent of what the actual mechanisms are. Thus, for example, elastic scattering measurements at CERN's Intersecting Storage Rings pointed the way to the behaviour eventually seen at the proton-antiproton collider. In the 1985 run, UA4 found the ratio (rho) between the real and the imaginary parts to be 0.24, about twice the theoretical prediction. At face value, this suggested that the total reaction rate would increase dramatically at higher collision energies. With such a prediction at stake, confirmation with a more precise measurement was necessary and the UA4/2 experiment (Genoa/ Palaiseau/Prague/Rome/Valencia collaboration) was launched. The real part of the scattering amplitude is obtained via measurements of elastic scattering in a four momentum transfer domain where strong and electromagnetic interactions are comparable. This corresponds to scattering angles of 100 microradians, with the detectors inside ''Roman pots'' close to the circulating beams, and using special beam optics. The new experiment took place in a five-week run late in 1991. With the Roman pots within 2mm of the beams, about a million elastic events were recorded. Several months later, a special dedicated run fixed the SPS
Transseries and real differential algebra
Hoeven, Joris
2006-01-01
Transseries are formal objects constructed from an infinitely large variable x and the reals using infinite summation, exponentiation and logarithm. They are suitable for modeling "strongly monotonic" or "tame" asymptotic solutions to differential equations and find their origin in at least three different areas of mathematics: analysis, model theory and computer algebra. They play a crucial role in Écalle's proof of Dulac's conjecture, which is closely related to Hilbert's 16th problem. The aim of the present book is to give a detailed and self-contained exposition of the theory of transseries, in the hope of making it more accessible to non-specialists.
Sistemas distribuidos de tiempo real
Ramón, Hugo Dionisio; Romero, Fernando; Pesado, Patricia Mabel; Bertone, Rodolfo Alfredo; Boracchia, Marcos; Thomas, Pablo Javier; Esponda, Silvia
2004-01-01
El objetivo de esta línea de investigación es el estudio y desarrollo de sistemas de software que poseen restricciones temporales. Resulta de interés el estudio de diferentes metodologías para la especificación y desarrollo de aplicaciones en tiempo real, así como las plataformas donde dichas aplicaciones pueden ejecutarse. Se trabaja experimentalmente con distintos tipos de hardware y software entre los que pueden mencionarse placas A/D, mini-robots, máquinas multimicroprocesadores y dife...
Sistemas distribuidos de tiempo real
Ramón, Hugo Dionisio; Romero, Fernando; González, Alejandro Héctor; Novarini, Pablo; Estrebou, César Armando
2005-01-01
El objetivo de esta línea de investigación es el estudio y desarrollo de sistemas de software que poseen restricciones temporales. Resulta de interés el estudio de diferentes metodologías para la especificación y desarrollo de aplicaciones en tiempo real, así como las plataformas donde dichas aplicaciones pueden ejecutarse. Se trabaja experimentalmente con distintos tipos de hardware y software entre los que pueden mencionarse placas A/D, mini-robots, plataformas de hardware (PC, PIC, etc....
The real estate industry in the Netherlands
Engelberts, Reinout; Suarez, Jose L.
2004-01-01
The real estate industry in the Netherlands is one of the most sophisticated in Europe. In fact, some Dutch real estate companies are among the most active in the international arena, and are major players in the ongoing integration in European markets. The paper describes the sectors of the real estate industry, i.e. residential and commercial (offices, retail and industrial), social housing policies, and the characteristics of the major companies. Individualized descriptions of listed real ...
The Internationalization of Real Estate Research
Kam C. Chan; William G. Hardin III; Kartono Liano; Zheng Yu
2008-01-01
The contributions of international researchers and institutions to real estate literature for the 1990 to 2006 period are assessed. Both the Asia-Pacific and European regions increase their influence on the top tier of real estate literature. The North American region, while still the dominant source of real estate research, sees its weighted share of publications in the top tier of academic real estate journals decline. Universities from Singapore, Hong Kong, Australia, the United Kingdom, S...
Real Estate Brokers View the College Curriculum.
Wells, Grant J.; Williams, Numan A.
1993-01-01
Real estate programs of 76 institutions accredited by the American Assembly of Collegiate Schools of Business (AACSB) were reviewed. Findings of a survey of real estate brokers (n=178) indicated that business programs within the parameters of the AACSB business curriculum should adequately prepare students for a career in real estate. (JOW)
Real Algebraic Tools in Stochastic Games
Abraham Neyman
2001-01-01
The present chapter brings together parts of the theory of polynomial equalities and inequalities used in the theory of stochastic games. The theory can be considered as a theory of polynomial equalities and inequalities over the field of real numbers or the field of real algebraic numbers or more generally over an arbitrary real closed field.
Real Option Applications to Information Security
Pythagoras PETRATOS
2008-01-01
Real options present advantages over the standard discounting methods. In this paper we analyze them briefly and examine their potential applications on information security. The applications of real options on valuation of information assets, information security investment and capital budgeting provide considerable benefits. Finally portfolios of real options and other financial products can reduce information security risk.
A real time monitoring system is described. It was initially developed to be used as a man-machine interface between a basic principles simulator of the Embalse Nuclear Power Plant and the operators. This simulator is under construction at the Bariloche Atomic Center's Process Control Division. Due to great design flexibility, this system can also be used in real plants. The system is designed to be run on a PC XT or AT personal computer with high resolution graphics capabilities. Three interrelated programs compose the system: 1) Graphics Editor, to build static image to be used as a reference frame where to show dynamically updated data. 2) Data acquisition and storage module. It is a memory resident module to acquire and store data in background. Data can be acquired and stored without interference with the operating system, via serial port or through analog-to-digital converter attached to the personal computer. 3) Display module. It shows the acquired data according to commands received from configuration files prepared by the operator. (Author)
Luciana Koprencka
2013-04-01
Full Text Available The construction sector is one of the mainsectors of the Albanian economy, which,during the last 20 years, has experiencedthe greatest economic growth. In 1991 thissector has contributed by 2.5% to the GDP,in 2006 by 4.9%, while in 2008, this sectorhas contributed by 14.9% to the national GDP. The relevant legislation has played animportant role in the development of this sector. The applied laws have tried to maintainat low levels the real estate prices and totransform such a problematic sector, withreference to fiscal evasion and informality,into an easily controllable sector. The taxesapplied in the construction sector are the sameas in other economic sectors, although thetaxation management in the construction sector, except forthose common principles thatregulate the tax management in general, isbased on some specificrules related to thecharacteristics of this sector. Increase the level of taxation on the transfer of ownership tothe extent of 10%, paralyzed the housing market by reducing the number of sales,especially of real estate old, previously this was 0.3-5%of sales value.JEL Classification: H21
O direito real de Kant Kant's real right
Aylton Barbieri Durão
2010-01-01
No direito real, Kant investiga a propriedade privada de uma substância (o solo e os objetos localizados nele). No estado de natureza, somente ocorre a posse física ou empírica de um objeto externo, a partir do postulado jurídico da razão prática como uma lei permissiva, pois, do contrário, as coisas utilizáveis seriam em-si ou res nullius, mas a posse jurídica ou inteligível depende da posse comum originária do solo (que não se confunde com o comunismo primitivo), para evitar que a proprieda...
Real Time Pricing and the Real Live Firm
Moezzi, Mithra; Goldman, Charles; Sezgen, Osman; Bharvirkar, Ranjit; Hopper, Nicole
2004-05-26
Energy economists have long argued the benefits of real time pricing (RTP) of electricity. Their basis for modeling customers response to short-term fluctuations in electricity prices are based on theories of rational firm behavior, where management strives to minimize operating costs and optimize profit, and labor, capital and energy are potential substitutes in the firm's production function. How well do private firms and public sector institutions operating conditions, knowledge structures, decision-making practices, and external relationships comport with these assumptions and how might this impact price response? We discuss these issues on the basis of interviews with 29 large (over 2 MW) industrial, commercial, and institutional customers in the Niagara Mohawk Power Corporation service territory that have faced day-ahead electricity market prices since 1998. We look at stories interviewees told about why and how they respond to RTP, why some customers report that they can't, and why even if they can, they don't. Some firms respond as theorized, and we describe their load curtailment strategies. About half of our interviewees reported that they were unable to either shift or forego electricity consumption even when prices are high ($0.50/kWh). Reasons customers gave for why they weren't price-responsive include implicit value placed on reliability, pricing structures, lack of flexibility in adjusting production inputs, just-in-time practices, perceived barriers to onsite generation, and insufficient time. We draw these observations into a framework that could help refine economic theory of dynamic pricing by providing real-world descriptions of how firms behave and why.
Introduction to Real Analysis An Educational Approach
Bauldry, William C
2011-01-01
An accessible introduction to real analysis and its connection to elementary calculus Bridging the gap between the development and history of real analysis, Introduction to Real Analysis: An Educational Approach presents a comprehensive introduction to real analysis while also offering a survey of the field. With its balance of historical background, key calculus methods, and hands-on applications, this book provides readers with a solid foundation and fundamental understanding of real analysis. The book begins with an outline of basic calculus, including a close examination of problems illust
Khovanskii-Rolle continuation for real solutions
Bates, Dan
2009-01-01
We present a new continuation algorithm to find all nondegenerate real solutions to a system of polynomial equations. Unlike homotopy methods, it is not based on a deformation of the system; instead, it traces real curves connecting the solutions of one system of equations to those of another, eventually leading to the desired real solutions. It also differs from homotopy methods in that it follows only real paths and computes no complex solutions of the original equations. The number of curves traced is bounded by the fewnomial bound for real solutions, and the method takes advantage of any slack in that bound.
Autonomous Real Time Requirements Tracing
Plattsmier, George; Stetson, Howard
2014-01-01
One of the more challenging aspects of software development is the ability to verify and validate the functional software requirements dictated by the Software Requirements Specification (SRS) and the Software Detail Design (SDD). Insuring the software has achieved the intended requirements is the responsibility of the Software Quality team and the Software Test team. The utilization of Timeliner-TLX(sup TM) Auto- Procedures for relocating ground operations positions to ISS automated on-board operations has begun the transition that would be required for manned deep space missions with minimal crew requirements. This transition also moves the auto-procedures from the procedure realm into the flight software arena and as such the operational requirements and testing will be more structured and rigorous. The autoprocedures would be required to meet NASA software standards as specified in the Software Safety Standard (NASASTD- 8719), the Software Engineering Requirements (NPR 7150), the Software Assurance Standard (NASA-STD-8739) and also the Human Rating Requirements (NPR-8705). The Autonomous Fluid Transfer System (AFTS) test-bed utilizes the Timeliner-TLX(sup TM) Language for development of autonomous command and control software. The Timeliner-TLX(sup TM) system has the unique feature of providing the current line of the statement in execution during real-time execution of the software. The feature of execution line number internal reporting unlocks the capability of monitoring the execution autonomously by use of a companion Timeliner-TLX(sup TM) sequence as the line number reporting is embedded inside the Timeliner-TLX(sup TM) execution engine. This negates I/O processing of this type data as the line number status of executing sequences is built-in as a function reference. This paper will outline the design and capabilities of the AFTS Autonomous Requirements Tracker, which traces and logs SRS requirements as they are being met during real-time execution of the
2010-06-25
... URBAN DEVELOPMENT 24 CFR Part 3500 Real Estate Settlement Procedures Act (RESPA): Home Warranty Companies' Payments to Real Estate Brokers and Agents AGENCY: Office of General Counsel, HUD. ACTION... performed by real estate brokers and agents as additional settlement services in a real estate...
Nonlocal Optical Real Image Formation Theory
Gilson, Greyson
2010-01-01
A nonlocal theory of optical real image formation is developed from the basic physics associated with an optical real image formation apparatus. The theory shows how two separated illuminated object points are required for real image formation. When the distance between the points exceeds twice the wavelength of the light used two equi-amplitude plane waves propagate independently away from the object plane toward the imaging system. Quantum amplitude components with spatial frequencies that are within the passband of the imaging system pass through the imaging system. Each plane wave pair that propagates through the imaging system and ultimately arrives at the image plane contributes to real image formation. Object and image field depths are treated and found to be very different than they are ordinarily thought to be. Resolution limits related to real image formation are investigated. Reference distribution real image formation (RIF) is introduced. Real image formation with no fundamental resolution limit i...
REAL TIME DATA PROCESSING FRAMEWORKS
Yash Sakaria
2015-09-01
Full Text Available On a business level, everyone wants to get hold of the business value and other organizational advantages that big data has to offer. Analytics has arisen as the primitive path to business value from big data. Hadoop is not just a storage platform for big data; it’s also a computational and processing platform for business analytics. Hadoop is, however, unsuccessful in fulfilling business requirements when it comes to live data streaming. The initial architecture of Apache Hadoop did not solve the problem of live stream data mining. In summary, the traditional approach of big data being co-relational to Hadoop is false; focus needs to be given on business value as well. Data Warehousing, Hadoop and stream processing complement each other very well. In this paper, we have tried reviewing a few frameworks and products which use real time data streaming by providing modifications to Hadoop.
Fedrigo, Desire Francine G; Gobato, Alekssander
2015-01-01
One of the most unusual military aircraft programs V / STOL was the Avro VZ-9 "Avrocar". Designed to be a real flying saucer, the Avrocar was one of the few V / STOL to be developed in complete secrecy. Despite significant changes in the design, during flight tests, the Avrocar was unable to achieve its objectives, and the program was eventually canceled after an expenditure of 10 million US dollars between 1954 and 1961. But the concept of a lift fan, driven by a turbojet engine is not dead, and lives today as a key component of Lockheed X-35 Joint Strike Fighter contender. Was held in a data research and information related to Avrocar project carried out during the Second World War, which was directly linked to advances in aircraft that were built after it, and correlate them with the turbo fan engines used today.
Definability in the Real Universe
Cooper, S Barry
2011-01-01
Logic has its origins in basic questions about the nature of the real world and how we describe it. This article seeks to bring out the physical and epistemological relevance of some of the more recent technical work in logic and computability theory. "If you are receptive and humble, mathematics will lead you by the hand. Again and again, when I have been at a loss how to proceed, I have just had to wait until I have felt the mathematics lead me by the hand. It has led me along an unexpected path, a path where new vistas open up, a path leading to new territory, where one can set up a base of operations, from which one can survey the surroundings and plan future progress." - Paul Dirac, 27 November, 1975. In Paul A. M. Dirac Papers, Florida State University Libraries, Tallahassee, Florida, USA, No. 2/29/17.
Is the physical Universe real?
Adams, S. F.
1987-01-01
The value of any model is always enhanced by an awareness of its limitations and it is this aspect of teaching which is too often overlooked. The philosophy of simple mechanistic theories is fundamentally different from that implied by the newer concepts of quantum mechanics and, whilst it might not be desirable to teach this subject formally at A-level, it would be good to develop an awareness of the revolutionary ideas of complementarity and correspondence which throw so much light on one's very way of thinking. The author explores preconceptions about what can be 'real' and describes the strangeness of the Universe as modelled by quantum theory. It goes on to suggest that the experience of physicists during this century ought to open our eyes to new types of theory in many diverse fields.
Developing Real Estate Education in Brazil: A Case Study of an MBA in Real Estate Development
Haddad, E.
2013-01-01
The practice of Real Estate in Brazil has gone to several changes in recent past that have resulted in an enormous development of the industry. It has implied in increasing demand for manpower training and development a local knowledge of this emerging field. Because of a virtual lack of a “Real Estate school” in Brazil, Real Estate has been approached by different educational traditions, such as construction planning and management, Real Estate business, Real Estate finance. The purpose of t...
The Changing Real Estate Market Transparency in the European Real Estate Markets
Newell, G.
2015-01-01
A key ingredient for increased investor confidence in the European real estate markets has been the improved real estate market transparency in the European markets in recent years. Using the JLL global real estate transparency index, countries are classified as high transparency, transparent, semi-transparent, low transparency and opaque. This paper assesses changes in the real estate transparency for 33 European real estate markets over 2001-2014. This is also assessed in a regional and glo...
The combinatorics of real double Hurwitz numbers with real positive branch points
Guay-Paquet, Mathieu; Markwig, Hannah; Rau, Johannes
2014-01-01
We investigate the combinatorics of real double Hurwitz numbers with real positive branch points using the symmetric group. Our main focus is twofold. First, we prove correspondence theorems relating these numbers to counts of tropical real covers and study the structure of real double Hurwitz numbers with the help of the tropical count. Second, we express the numbers as counts of paths in a subgraph of the Cayley graph of the symmetric group. By restricting to real double Hurwitz numbers wit...
Luo, Yun; 骆韵
2013-01-01
Global investors often invest in publicly traded indirect real estate (IRE) such as Real Estate Investment Trust (REIT) and listed property companies rather than physical real estate asset in order to get exposure in foreign real estate markets for a number of reasons that mainly originated from the high transaction cost in the direct real estate (DRE) market. However, in reality IRE is not a perfect substitute of DRE and that the substitutability between IRE and DRE varies across markets. Ve...
Real Gromov-Witten Theory in All Genera and Real Enumerative Geometry: Computation
Georgieva, Penka
2015-01-01
The first part of this work constructs real positive-genus Gromov-Witten invariants of real-orientable symplectic manifolds of odd "complex" dimensions; the second part studies the orientations on the moduli spaces of real maps used in constructing these invariants. The present paper applies the results of the latter to obtain quantitative and qualitative conclusions about the invariants defined in the former. After describing large collections of real-orientable symplectic manifolds, we show that the real genus 1 Gromov-Witten invariants of sufficiently positive almost Kahler threefolds are signed counts of real genus 1 curves only and thus provide direct lower bounds for the counts of these curves in such targets. We specify real orientations on the real-orientable complete intersections in projective spaces; the real Gromov-Witten invariants they determine are in a sense canonically determined by the complete intersection itself, (at least) in most cases. We also obtain equivariant localization data that c...
O direito real de Kant Kant's real right
Aylton Barbieri Durão
2010-01-01
Full Text Available No direito real, Kant investiga a propriedade privada de uma substância (o solo e os objetos localizados nele. No estado de natureza, somente ocorre a posse física ou empírica de um objeto externo, a partir do postulado jurídico da razão prática como uma lei permissiva, pois, do contrário, as coisas utilizáveis seriam em-si ou res nullius, mas a posse jurídica ou inteligível depende da posse comum originária do solo (que não se confunde com o comunismo primitivo, para evitar que a propriedade seja uma relação entre pessoas e coisas, como acontece na teoria do trabalho, porque todo direito exige um dever correspondente. Todavia, coisas não podem ter deveres com relação a pessoas, condição seguida da vontade unilateral do primeiro ocupante de querer o objeto e do advento de uma vontade unificada a priori do provo, que só se torna efetiva no estado civil, a única capaz de gerar uma obrigação recíproca entre todos; por isso, a posse inteligível somente é possível no estado civil, embora a posse empírica do estado de natureza tenha a presunção de tornar-se jurídica, quando ocorrer a entrada no estado jurídico e vale por comparação na espera e preparação daquele estado.In real right, Kant investigates the private property of a substance (the soil and the objects on it. In the state of nature the physical or empirical possession of an external object only occurs based on the juridical postulate of the practical reason as a permissive law; otherwise, usable things would be in themselves, or res nullius, but the juridical or intelligible possession depends on the common possession which originates from the soil (and cannot be confounded with primitive communism, to avoid the property to be a relation among people and things, such as what happens in the work theory, because all rights demand a correlated duty, but things cannot have duties towards people, followed by the first occupant's unilateral will to want the
Ring homomorphisms on real Banach algebras
Sin-Ei Takahasi
2003-08-01
Full Text Available Let B be a strictly real commutative real Banach algebra with the carrier space ÃŽÂ¦B. If A is a commutative real Banach algebra, then we give a representation of a ring homomorphism ÃÂ:AÃ¢Â†Â’B, which needs not be linear nor continuous. If A is a commutative complex Banach algebra, then ÃÂ(A is contained in the radical of B.
Municipal Real Estate Decision Support System
M. Arkesteijn; S. van den Schootbrugge; P.Paul Van Loon
2011-01-01
More and more municipalities have opted to establish a more centralized real estate management. This means that in these municipalities there is one real estate management organization. Since 1995 the number of municipalities that have centralized has increased from 18 (K et al 1995) to 34 percent in 2008 (A et al 2008). In 2009 69 percent of large municipalities (> 75,000 inhabitants) have a centrally organized real estate management (T & S 2010). This should lead to a more efficient and eff...
DETERMINANTS OF REAL EXCHANGE RATE IN ETHIOPIA
Dr. P.Nandeeswara Rao; Tassew Dufera Tolcha
2016-01-01
Real exchange rate has direct effects on trade particularly on international trade and has indirect effects on productions and employments, so it is crucial to understand the factors which determine its variations. This study analyses the main determinants of the real exchange rate and the dynamic adjustment of the real exchange rate following shocks to those determinants using yearly Ethiopian time series data covering the period 1971 to 2010. It begins with a review of literatures on Exchan...
Quantum Mechanics interpreted in Quantum Real Numbers
Corbett, John V.; Durt, Thomas
2002-01-01
The concept of number is fundamental to the formulation of any physical theory. We give a heuristic motivation for the reformulation of Quantum Mechanics in terms of non-standard real numbers called Quantum Real Numbers. The standard axioms of quantum mechanics are re-interpreted. Our aim is to show that, when formulated in the language of quantum real numbers, the laws of quantum mechanics appear more natural, less counterintuitive than when they are presented in terms of standard numbers.
Listing Specialization and Residential Real Estate Licensee
Leonard V. Zumpano; Ken Johnson; Randy I . Anderson
2007-01-01
Earlier research has found that specialization by real estate agents creates economies of scope for real estate firms. So far, however, no research has addressed this issue at the agent level. The question this research seeks to answer is whether specialization in one side of the real estate transaction increases agent income. The most important finding is that specialization has an asymmetric impact on earnings. Specializing in listings positively enhances agent income. In contrast, speciali...
Product Liability Issues in Real Estate Brokerage
Thomas Potter; Theron R. Nelson; Susan Logan Nelson
1991-01-01
The legal environment for real estate brokers is moving inexorably toward the doctrine of strict liability in a product liability context. The agency relationship model currently popular in real estate brokerage may not be able to withstand this threat. A recommendation is made that the industry move toward a market-making role which lies outside the chain of distribution of the real estate product. By moving out of the distribution channel, brokers may be able to revert to a "due care" stand...
Taxation, Risk and Real Interest Rates
Carolyn Jenkins; Charles Harvey
1993-01-01
It is an established orthodoxy that negative real interest rates constrain development, by causing financial repression.' The World Bank and the International Monetary Fund (IMF) frequently make the raising of nominal interest rates above the rate of inflation a condition of their lending; and some countries without IMF or World Bank programmes have announced that positive real interest rates are a policy objective. This paper does not challenge the argument that negative real interest rates ...
Real meromorphic functions and linear differential polynomials
LANGLEY; J.; K.
2010-01-01
We determine all real meromorphic functions f in the plane such that f has finitely many zeros, the poles of f have bounded multiplicities, and f and F have finitely many non-real zeros, where F is a linear differential polynomial given by F = f (k) +Σk-1j=0ajf(j) , in which k≥2 and the coefficients aj are real numbers with a0≠0.
The Official Real Estate Appraisal in Germany
Christoph JOCHEIM-WIRTZ
2013-01-01
The Real Estate Appraisal in Germany is regulated by the articles 192-199 of the German Construction Law. Technical guidelines, including the appraisal methods, are defined in bylaws. For the purpose of official real estate appraisal, Expert Appraisal Committees were founded in counties and large cities. The Committees are comprised of real estate experts doing a honorary service, coming from such professions as land surveying engineers, architects, civil engineers, Tax Office employees, expe...
An Equilibrium Analysis of Real Estate Leases
Steven R. Grenadier
2005-01-01
This article provides a unified equilibrium approach to valuing commercial real estate leases. Using a game-theoretic variant of real options analysis, the underlying real estate asset market is modeled as a continuous-time Nash equilibrium, where developers make construction decisions under demand uncertainty. Then, using the economic notion that leasing represents the purchase of the use of the asset over a specified time, I use a contingent-claims approach to value many of the most common ...
Modular specification of real-time systems
Inal, Recep
Duration Calculus, a real-time interval logic, has been embedded in the Z specification language to provide a notation for real-time systems that combines the modularisation and abstraction facilities of Z with a logic suitable for reasoning about real-time properties. In this article the notation...... is presented through a top-level specification of requirements for a simple air traffic monitoring system, and reasoning is illustrated by a refinement towards a design...
Modular specification of real-time systems
Inal, Recep
1994-01-01
Duration Calculus, a real-time interval logic, has been embedded in the Z specification language to provide a notation for real-time systems that combines the modularisation and abstraction facilities of Z with a logic suitable for reasoning about real-time properties. In this article the notation is presented through a top-level specification of requirements for a simple air traffic monitoring system, and reasoning is illustrated by a refinement towards a design
Archtecture of distributed real-time systems
Wing Leung, Cheuk
2013-01-01
CRAFTERS (Constraint and Application Driven Framework for Tailoring Embedded Real-time System) project aims to address the problem of uncertainty and heterogeneity in a distributed system by providing seamless, portable connectivity and middleware. This thesis contributes to the project by investigating the techniques that can be used in a distributed real-time embedded system. The conclusion is that, there is a list of specifications to be meet in order to provide a transparent and real-time...
PBL - making natural resource education really real
Ford, Bob
1998-01-01
A major concern in education today is making the student learning experience relevant to facilitate workforce readiness. Problem-Based Learning (PBL) is an instructional format which actively engages students in the learning process by requiring them to solve real-life problems (Arambula-Greenfield 1996, Norman and Schmidt 1992). Often times, however, the real-life experiences used are hypothetical and, as a result, simplify the problem to the point that the realness of the problem no longer ...
Real-time Transmission Over Internet
Gao, Qi
2004-01-01
With the Internet expansion, real-time transmission over Internet is becoming a new promising application. Successful real-time communication over IP networks requires reasonably reliable, low delay, low loss date transport. Since Internet is a non-synchronous packet switching network, high load and lack of guarantees on data delivery make real-time communication such as Voice and Video over IP a challenging application to become realistic on the Internet. This thesis work is composed of two...
Modeling real property transactions with use cases
Ferlan, Miran; Šumrada, Radoš
2008-01-01
This paper analyses land security management principles and practice in Slovenia (Si) by presenting a real property transaction example that is formally described and modeled as a use case. First the legislation settings and the description of the dual real property registration system in Slovenia are shortly outlined. Then use case descriptions and UML diagramming examples of a simplified real property transaction process are developed. The use case described is th...
Modeling real property transactions with use cases
Miran Ferlan; Radoš Šumrada
2015-01-01
This paper analyses land security management principles and practice in Slovenia (Si) by presenting a real property transaction example that is formally described and modeled as a use case. First the legislation settings and the description of the dual real property registration system in Slovenia are shortly outlined. Then use case descriptions and UML diagramming examples of a simplified real property transaction process are developed. The use case described is the sale of a whole urban bui...
Janie Conway-Herron
2011-03-01
Full Text Available Australia’s history parallels the movement of modernity towards neo - colonial enterprises encapsulated in globalisation, while Australian identity lends itself to the fragmentation inherent in the conflicting discourses of national identification that make up its history. The psychology derived from this is startlingly apparent in our more recent history as we battle to come to terms with new and insidious incursions into Indigenous hum an rights. The bicentenary year gave Australia an opportunity to highlight the “coming of age” that emerged from being mature enough to admit that white Australia has a black history. A tension between a utopian notion held by some that the celebrations ma rked a time when Australia had reached a coming of age and others who were ambivalent about the nature of the celebrations has led to a re - evaluation of Australian ideas of nationhood. What is Happening is Real is an exploration of the tensions that gave r ise to a continuing engagement in the ongoing challenges that 1988 presented to all Australians.
Mobile real time radiography system
Vigil, J.; Taggart, D.; Betts, S. [Los Alamos National Lab., NM (United States)] [and others
1997-11-01
A 450-keV Mobile Real Time Radiography (RTR) System was delivered to Los Alamos National Laboratory (LANL) in January 1996. It was purchased to inspect containers of radioactive waste produced at (LANL). Since its delivery it has been used to radiograph more than 600 drums of radioactive waste at various LANL sites. It has the capability of inspecting waste containers of various sizes from <1-gal. buckets up to standard waste boxes (SWB, dimensions 54.5 in. x 71 in. x 37 in.). It has three independent x-ray acquisition formats. The primary system used is a 12- in. image intensifier, the second is a 36-in. linear diode array (LDA) and the last is an open system. It is fully self contained with on board generator, HVAC, and a fire suppression system. It is on a 53-ft long x 8-ft. wide x 14-ft. high trailer that can be moved over any highway requiring only an easily obtainable overweight permit because it weights {approximately}38 tons. It was built to conform to industry standards for a cabinet system which does not require an exclusion zone. The fact that this unit is mobile has allowed us to operate where the waste is stored, rather than having to move the waste to a fixed facility.
Mobile real time radiography system
A 450-keV Mobile Real Time Radiography (RTR) System was delivered to Los Alamos National Laboratory (LANL) in January 1996. It was purchased to inspect containers of radioactive waste produced at (LANL). Since its delivery it has been used to radiograph more than 600 drums of radioactive waste at various LANL sites. It has the capability of inspecting waste containers of various sizes from <1-gal. buckets up to standard waste boxes (SWB, dimensions 54.5 in. x 71 in. x 37 in.). It has three independent x-ray acquisition formats. The primary system used is a 12- in. image intensifier, the second is a 36-in. linear diode array (LDA) and the last is an open system. It is fully self contained with on board generator, HVAC, and a fire suppression system. It is on a 53-ft long x 8-ft. wide x 14-ft. high trailer that can be moved over any highway requiring only an easily obtainable overweight permit because it weights ∼38 tons. It was built to conform to industry standards for a cabinet system which does not require an exclusion zone. The fact that this unit is mobile has allowed us to operate where the waste is stored, rather than having to move the waste to a fixed facility
Real-time graphics rendering engine
Bao, Hujun
2011-01-01
""Real-Time Graphics Rendering Engine"" reveals the software architecture of the modern real-time 3D graphics rendering engine and the relevant technologies based on the authors' experience developing this high-performance, real-time system. The relevant knowledge about real-time graphics rendering such as the rendering pipeline, the visual appearance and shading and lighting models are also introduced. This book is intended to offer well-founded guidance for researchers and developers who are interested in building their own rendering engines. Hujun Bao is a professor at the State Key Lab of
Real-time Pricing in Power Markets
Boom, Anette; Schwenen, Sebastian
We examine welfare eects of real-time pricing in electricity markets. Before stochastic energy demand is known, competitive retailers contract with nal consumers who exogenously do not have real-time meters. After demand is realized, two electricity generators compete in a uniform price auction to...... Bertrand case, welfare is the same with all or no consumers on smart meters....... satisfy demand from retailers acting on behalf of subscribed customers and from consumers with real-time meters. Increasing the number of consumers on real-time pricing does not always increase welfare since risk-averse consumers dislike uncertain and high prices arising through market power. In the...
Research in Distributed Real-Time Systems
Mukkamala, R.
1997-01-01
This document summarizes the progress we have made on our study of issues concerning the schedulability of real-time systems. Our study has produced several results in the scalability issues of distributed real-time systems. In particular, we have used our techniques to resolve schedulability issues in distributed systems with end-to-end requirements. During the next year (1997-98), we propose to extend the current work to address the modeling and workload characterization issues in distributed real-time systems. In particular, we propose to investigate the effect of different workload models and component models on the design and the subsequent performance of distributed real-time systems.
Real exchange rate targeting and macroeconomic instability
Martin Uribe
1995-01-01
This paper introduces a real exchange rate rule of the type analyzed by Dornbusch (1982) in an optimizing, two-sector, monetary model of a small open economy. By this rule the government increases the devaluation rate when the real exchange rate is below its long-run level and reduces it when the real exchange rate is above its long-run level. I show that the mere existence of such a rule can give room for extrinsic uncertainty to have real effects, that is, it can generate economic fluctuati...
De toekomst van Real Time Intelligence
Broek, J. van den; Berg, C.H. van den
2013-01-01
Al direct vanaf de start van de Nationale Politie is gewerkt aan het opzetten van tien real-time intelligence centra in Nederland. Van daaruit worden 24 uur per dag en zeven dagen in de week agenten op straat actief ondersteund met real-time informatie bij de melding waar ze op af gaan. In de visie van TNO is de kracht van real-time intelligence, dat het bijdraagt aan het creëren van een beter beeld van de situatie waarin ingegrepen moet worden. Real-time intelligence kan op die manier een gr...
Real and imaginary negative binomial states
Liao, Jing; Wang, Xiaoguang; Wu, Ling-An; Pan, Shao-Hua
2001-10-01
The real and imaginary negative binomial states formed by a superposition of the negative binomial states are introduced. The sub-Poissonian statistics, Wigner function and squeezing properties of the real and imaginary states are studied in detail. The oscillatory character of the photon distribution due to the quantum interference between the two components is shown. Moreover, we find that these states are real and imaginary nonlinear Schrödinger cat states and give the corresponding ladder operator formalisms. We also discuss how to generate these general real quantum superposition states based on the intensity-dependent Jaynes-Cummings model.
Accounting costs of transactions in real estate
Stubkjær, Erik
2005-01-01
The costs of transactions in real estate is of importance for households, for investors, for statistical services, for governmental and international bodies concerned with the efficient delivery of basic state functions, as well as for research. The paper takes a multi-disciplinary approach in...... relating theoretical conceptualizations of transaction costs to national accounting and further to the identification and quantification of actions on units of real estate. The notion of satellite accounting of the System of National Accounts is applied to the segment of society concerned with changes in...... real estate. The paper ends up with an estimate of the cost of a major real property transaction in Denmark....
Fresh Air in Real Estate Policies
Zhao Yan
2008-01-01
@@ Recently, due to the international financial crisis, the decline in domestic economic growth and in the real estate market, the central and local governments have issued a series of policies and measures designed to stimulate the real estate industry. On the one hand, the central government starts stimulating the real estate market by tax relief, relaxation of credit and security housing construction. On the other hand, with the support of the central government, more and more local governments have implemented their own new real estate policies in order to promote the recovery of the local market.
The voter referendums on nuclear power planned in some states can affect the energy supply and economic health of the public at large more than it affects the industry that provides nuclear power, the author states. He makes the point that those responsible for energy supplies in the U. S.--the President and all relevant Federal agencies, the majority of Congress, the national utility industry, major laboratories, universities and consulting firms, and other energy industries--all favor nuclear power. The complex U.S. energy situation is reviewed, and the hope of alternative energy sources, practice of energy conservation, and benefits of nuclear power are summarized. Specifically, the California Initiative and its three conditions which it says should dictate the future of nuclear power are reviewed. The author does not believe that the reasons that are usually given in opposing nuclear power are the real reasons. He states that ''it seems clear that the principal philosophy behind the initiatives is one of halting economic growth by striking at the energy source that would make that growth possible.'' Attention is called to the morality of nuclear power by asking where is the morality: in leaving future generations an insufficient amount of energy, limiting their abilities to solve the economic and employment problems; in squandering our finite supply of fossil fuels while ignoring nuclear fuels; in forcing the nation into further dependence on unpredictable foreign nations for its energy supply; in expecting other states to provide California with the energy that it does not want to generate itself; and in allowing an arbitrary limit on growth to be set by groups of political activists
12 CFR 541.21 - Nonresidential real estate.
2010-01-01
... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Nonresidential real estate. 541.21 Section 541... REGULATIONS AFFECTING FEDERAL SAVINGS ASSOCIATIONS § 541.21 Nonresidential real estate. The terms nonresidential real estate or nonresidential real property mean real estate that is not residential real...
Symplectic structure of the real Ginibre ensemble
Sommers, Hans-Juergen [Fachbereich Physik, Universitaet Duisburg-Essen, 47048 Duisburg (Germany)
2007-07-20
We give a simple derivation of all n-point densities for the eigenvalues of the real Ginibre ensemble with even dimension N as quaternion determinants. A very simple symplectic kernel governs both the real and complex correlations. One- and two-point correlations are discussed in more detail. Scaling forms for large dimension N are derived. (fast track communication)
Real-time Pricing in Power Markets
Boom, Anette; Schwenen, Sebastian
satisfy demand from retailers acting on behalf of subscribed customers and from consumers with real-time meters. Increasing the number of consumers on real-time pricing does not always increase welfare since risk-averse consumers dislike uncertain and high prices arising through market power. In the...
Real Hypersurfaces of a Complex Space Form
Sharief Deshmukh
2012-11-01
In this paper we are interested in obtaining a condition under which a compact real hypersurface of a complex projective space $CP^n$ is a geodesic sphere. We also study the question as to whether the characteristic vector field of a real hypersurface of the complex projective space $CP^n$ is harmonic, and show that the answer is in negative.
Validation of RNAi by real time PCR
Josefsen, Knud; Lee, Ying Chiu
2011-01-01
Real time PCR is the analytic tool of choice for quantification of gene expression, while RNAi is concerned with downregulation of gene expression. Together, they constitute a powerful approach in any loss of function studies of selective genes. We illustrate here the use of real time PCR to verify...
Hanssen, Ferdy; Hartel, Pieter; Jansen, Pierre; Scholten, Hans; Vervoort, Wiek
2001-01-01
This paper proposes a home network which integrates both real-time and non-real-time capabilities for one coherent, distributed architecture. Such a network is not yet available. Our network will support inexpensive, small appliances as well as more expensive, large appliances. The network is based
International Approaches to Real Estate Development
Piyush Kumar Tiwari
2015-01-01
Book ReviewInternational Approaches to Real Estate Development Squires, G. and Heurkens, E., 2015. International Approaches to Real Estate Development. Routledge, UK. ISBN (hbk): 978-0-415-82857-4, ISBN (pbk): 978-0-415-82858-1, Paperback: US$49.95, Hardback: US$165.00.
Storm real-time processing cookbook
Anderson, Quinton
2013-01-01
A Cookbook with plenty of practical recipes for different uses of Storm.If you are a Java developer with basic knowledge of real-time processing and would like to learn Storm to process unbounded streams of data in real time, then this book is for you.
Real-time Pricing in Power Markets
Boom, Anette; Schwenen, Sebastian
We examine welfare eects of real-time pricing in electricity markets. Before stochastic energy demand is known, competitive retailers contract with nal consumers who exogenously do not have real-time meters. After demand is realized, two electricity generators compete in a uniform price auction to...
Real-time Pricing in Power Markets
Boom, Anette; Schwenen, Sebastian
We examine welfare e ects of real-time pricing in electricity markets. Before stochastic energy demand is known, competitive retailers contract with nal consumers who exogenously do not have real-time meters. After demand is realized, two electricity generators compete in a uniform price auction to...
A Thermodynamic Classification of Real Numbers
Garrity, Thomas
2008-01-01
A new classification scheme for real numbers is given, motivated by ideas from statistical mechanics in general and work of Knauf and of Fiala and Kleban in particular. Critical for this classification of a real number will be the Diophantine properties of its continued fraction expansion.
Real time programming environment for Windows
LaBelle, D.R. [LaBelle (Dennis R.), Clifton Park, NY (United States)
1998-04-01
This document provides a description of the Real Time Programming Environment (RTProE). RTProE tools allow a programmer to create soft real time projects under general, multi-purpose operating systems. The basic features necessary for real time applications are provided by RTProE, leaving the programmer free to concentrate efforts on his specific project. The current version supports Microsoft Windows{trademark} 95 and NT. The tasks of real time synchronization and communication with other programs are handled by RTProE. RTProE includes a generic method for connecting a graphical user interface (GUI) to allow real time control and interaction with the programmer`s product. Topics covered in this paper include real time performance issues, portability, details of shared memory management, code scheduling, application control, Operating System specific concerns and the use of Computer Aided Software Engineering (CASE) tools. The development of RTProE is an important step in the expansion of the real time programming community. The financial costs associated with using the system are minimal. All source code for RTProE has been made publicly available. Any person with access to a personal computer, Windows 95 or NT, and C or FORTRAN compilers can quickly enter the world of real time modeling and simulation.
Commercial real estate analysis and investments
Geltner, D.; Miller, N.; Clayton, J.; Eichholtz, P.M.A.
2013-01-01
The well-known and respected authorship team of Geltner and Miller bring you a new edition of what has become the undisputed and authoritative resource on commercial real estate investment. Streamlined and completely updated with expanded coverage of corporate and international real estate investmen
Real-Life Stories about Addiction Struggles
... turn Javascript on. Feature: Preventing Drug Abuse and Addiction Real-Life Stories About Addiction Struggles Past Issues / Fall 2011 Table of Contents “ ... VIDEO NIHSeniorHealth Videos Offer Real-Life Stories About Addiction Struggles—and Much More Many of the health ...
Real time estimates of GDP growth
Groot, de E.A. (Bert); Franses, P.H.P.H.
2005-01-01
This paper describes the components of the EICIE, the Econometric Institute Current Indicator of the Economy. This measure concerns quarterly and annual growth of Dutch real Gross Domestic Product. The key component of our real-time forecasting model for Dutch quarterly GDP is weekly staffing servic
Real time estimates of GDP growth
E.A. de Groot (Bert); Ph.H.B.F. Franses (Philip Hans)
2005-01-01
textabstractThis paper describes the components of the EICIE, the Econometric Institute Current Indicator of the Economy. This measure concerns quarterly and annual growth of Dutch real Gross Domestic Product. The key component of our real-time forecasting model for Dutch quarterly GDP is weekly sta
The Cluster Enterprise of Real Property Business
Stubkjær, Erik
2008-01-01
In order to apply the potential of available web technology, business processes must be described in a coherent way across organizational boundaries. Business processes include geographical data in the context of constructions, as well as environmental affairs and real property transactions, amon...... steps towards a standardization of real estate business....
The homogeneous geometries of real hyperbolic space
Castrillón López, Marco; Gadea, Pedro Martínez; Swann, Andrew Francis
We describe the holonomy algebras of all canonical connections of homogeneous structures on real hyperbolic spaces in all dimensions. The structural results obtained then lead to a determination of the types, in the sense of Tricerri and Vanhecke, of the corresponding homogeneous tensors. We use...... our analysis to show that the moduli space of homogeneous structures on real hyperbolic space has two connected components....
Effective Thermal Diffusivity in Real Solid
Chakraborty, Aniruddha
2015-01-01
The effective thermal diffusivity is evaluated for a two dimensional real solid and the real solid is modeled with periodic surface. The result contain the scale factor for the conformal transformation that flattens the surface. We find that the effective thermal diffusivity is always less than the local thermal diffusivity and this conclusion is independent of the model.
Real Estate Publicity and Acquisitive Prescription
Peptan, Rodica
2011-01-01
Acquisitive prescription as a way of acquiring the main rigts in rem, that are usually real estate rights, arises the question of its relation to the public real estate system regarding various aspects, related to the type of regulation of the two law institutions at a given moment.
Real Moments of the Restrictive Factor
Andrew Ledoan; Alexandru Zaharescu
2009-09-01
Let be a real number such that 0 < < 1. We establish asymptotic formulas for the weighted real moments $\\sum_{n≤ x}R^(n)(1-n/x)$, where $R(n)=\\prod^k_{v=1}p^{ v-1}_v$ is the Atanassov strong restrictive factor function and $n=\\prod^k_{v=1}p^{ v}_v$ is the prime factorization of .
Cohomology of real four-dimensional triquadrics
Krasnov, Vyacheslav A.
2012-10-01
We consider non-singular intersections of three real six-dimensional quadrics. They are referred to for brevity as real four-dimensional triquadrics. We calculate the dimensions of their cohomology spaces with coefficients in the field of two elements.
Cohomology of real three-dimensional triquadrics
Krasnov, Vyacheslav A.
2012-02-01
We consider non-singular intersections of three real five-dimensional quadrics. They are referred to for brevity as real three-dimensional triquadrics. We calculate the dimensions of the cohomology spaces of triquadrics with coefficients in the field of two elements.
Cohomology of real three-dimensional triquadrics
Krasnov, Vyacheslav A [P.G. Demidov Yaroslavl State University, Yaroslavl (Russian Federation)
2012-02-28
We consider non-singular intersections of three real five-dimensional quadrics. They are referred to for brevity as real three-dimensional triquadrics. We calculate the dimensions of the cohomology spaces of triquadrics with coefficients in the field of two elements.
The impact of real oil price on real effective exchange rate: The case of Azerbaijan
Hasanov, Fakhri
2010-01-01
Using quarterly data from 2000-2007 and applying Error Correction Model and Johansen Co- integration Approaches I estimate the impact of real oil price on the real exchange rate of Azerbaijani manat. Estimation outputs derived from these approaches are very close to each other and indicate that real oil price has statistically significant positive impact on real exchange rate in the long-run. Besides, revealed that relative price as a proxy for productivity has also explana...
Robert H. Pittman; Joel R. Parker
1989-01-01
There is a growing awareness that corporations can profit from more effective management of their real estate assets, yet there is little academic research in the field. Based on a survey of corporate real estate executives, this article identifies some key organizational and operational factors that are considered to be important in effective corporate real estate asset management. A qualitative model of corporate real estate effectiveness is proposed, drawing on the emerging literature in t...
Real estate data avaliability for market analysis and single real estate valuation
Tušek, Tea
2007-01-01
Diploma analyses avaliability of some public accesable real estate data for market analysis and single real estate evaluation. It deals with the manner of the state review on the real estate market in the Republic of Slovenia and in the Federal Republic of Germany including legal regulations in both countries, which directly and indirectly interfere with this field. It describes the data base – Record of real estate market, whose primary function is mass evaluation, however, it can be also ap...
Real Estate and Real Estate Finance as a Research Field - An International Overview
Breuer, W.; C. Kreuz
2011-01-01
We present a citation-based analysis of the most important journals on real estate and real estate finance over a time period from 1986 to 2010. For each year, those three articles with the highest number of citations according to Google Scholar are identified. A thorough analysis of all 75 selected articles reveals that the focus of interest has been on (1) empirical research, (2) mainly using data of residential real estate, with (3) the primary objective of evaluating real estate investmen...
Real Shocks and the Equilibrium Real Exchange Rate: In the Case of Wage Rigidity
Hee-Ho Kim; John Dutton
1997-01-01
Using a simple exchange rate model, this paper investigates the role of unemployment in determining the ejfects of different shocks on the real exchange rate. The presence of unenioloyment in an economy is shown to significantly alter the relationship between real variables and the real exchange rate. This implies that the generally believed traditional propositions concerning real shocks and the exchange rate might not be valid anymore in the economy with unemployment and thus, that l ignori...
Shen, Jianfu; 沈建富
2012-01-01
The aim of this research is to investigate corporate behavior, including investment and financing decisions, when corporations face uncertainty and flexibility/inflexibility, and to explore the effects of this behavior on real option valuation. It expands the real options analysis framework into two paths: the first is to add institutional details, portfolio aspects and financial structure into the classical real option model; the other is to extend the real option model into a firm valuation...
Multiprocessor scheduling for real-time systems
Baruah, Sanjoy; Buttazzo, Giorgio
2015-01-01
This book provides a comprehensive overview of both theoretical and pragmatic aspects of resource-allocation and scheduling in multiprocessor and multicore hard-real-time systems. The authors derive new, abstract models of real-time tasks that capture accurately the salient features of real application systems that are to be implemented on multiprocessor platforms, and identify rules for mapping application systems onto the most appropriate models. New run-time multiprocessor scheduling algorithms are presented, which are demonstrably better than those currently used, both in terms of run-time efficiency and tractability of off-line analysis. Readers will benefit from a new design and analysis framework for multiprocessor real-time systems, which will translate into a significantly enhanced ability to provide formally verified, safety-critical real-time systems at a significantly lower cost.
Hybrid Multiprocessor Real-Time Scheduling Approach
Ali A Safaei
2011-03-01
Full Text Available Real-time scheduling is one of the most important aspects of a real-time system design. To achieve a real-time system's requirement, especially to be fast, multiprocessor systems are used. Generally, multiprocessor real-time scheduling algorithms fall into one the two well-known approaches: Partitioning or Global. The partitioning approach has acceptable overhead for underlying system but can NOT guarantee to provide an optimal schedule. The global approach can provide this guarantee by holding some preconditions and considerable overheads. In this paper, an intermediate hybrid multiprocessor real-time scheduling approach is proposed in which optimality will be reached via the minimum overheads for underlying system. Presenting and analyzing different feasible paradigms for combination of the two existing approaches, the proposed hybrid approach satisfies the two major goals of this combination: optimality and lightweightness. Experimental results show that the hybrid approach outperforms the two existing ones.
2010-12-01
... URBAN DEVELOPMENT 24 CFR Part 3500 Real Estate Settlement Procedures Act (RESPA): Home Warranty Companies' Payments to Real Estate Brokers and Agents Interpretive Rule: Response to Public Comments AGENCY... fees to real estate brokers and agents by home warranty companies. The public was invited to comment...
Capitulo 18. Apoidea: Las Abejas. In: I. Gauld & P. Hanson, Hymenoptera de la Region Neotropical
This chapter provides a comprehensive characterization of the bees of the Neotropics, the region from southern Mexico to the southern tip of South America. The bees of this region are very diverse. There are over 3680 species known with many additional species yet to be discovered. The biology, es...
Data Analysis for Monitoring Japan's Real Estate Market
Yuichiro Ito; Ichiro Muto; Yasutaka Takizuka
2015-01-01
Large movements in the real estate market not only magnify fluctuations in the real economy but also destabilize the financial system. For this reason, it is quite important for central banks to monitor real estate market trends both in terms of monetary policy and prudential policy. Based on recently enhanced statistics, this article presents a data analysis for monitoring the real estate market from three perspectives: 1) real estate transactions; 2) real estate prices; and 3) real estate f...
Spaces of orderings and abstract real spectra
Marshall, Murray A
1996-01-01
This book is of interest to students as well as experts in the area of real algebraic geometry, quadratic forms, orderings, valuations, lattice ordered groups and rings, and in model theory. The original motivation comes from orderings on fields and commutative rings. This is explained as is the important application to minimal generation of semi-algebraic sets. Many results in the new theory of abstract real spectra (also called spaces of signs) appear here for the first time. The reader needs elementary knowledge of commutative rings, ordered fields and real closed fields and valuations.
Demographic Factors and Real House Prices
Richard K. Green; Patric H. Hendershott
1993-01-01
Real house prices are directly determined by the willingness of households to pay for (and willingness of builders to supply) a constant-quality house. Changes in the quantity of housing demanded will affect real prices only to the extent that the long-run housing supply schedule is positively sloped. In this paper we use 1980 census data to measure the impact of the age structure and real income per household on the willingness of households to pay for a constant quality house. Extrapolating...
On the thermodynamic description of real systems
A new method of approach to the theory of the thermodynamic properties of real systems is proposed, to include interactions among the constituent particles of the system. The method consists in obtaining the entropy of a real system from the entropy of the corresponding ideal system by a translation in the internal energy and other relevant extensive variables. The usefulness of the method is displayed by application to the cases of: (i) real gases, and (ii) spin paramagnetism with interactions among spins. It is shown that this description corresponds to a generalization of the molecular field approximation. (Author)
Real Options Valuation Based on Certainty Equivalents
Cecilia Maya Ochoa
2014-12-01
Full Text Available This purpose of this research is to identify appropriate rates to discount the flows from real options in situations in which the risk-free rate does not apply, in particular, in incomplete markets. A methodology is proposed for valuing real options based on certainty equivalence, which requires as a principal condition the consideration of preferences represented with utility functions. A constant relative risk aversion (CRRA utility function is used to represent these preferences. The results indicate that this methodology adequately reflects how the value of a real option changes in accordance with an investor´s preferences.
Lagrangian solution of supersonic real gas flows
Loh, Ching-Yuen; Liou, Meng-Sing
1993-01-01
The present extention of a Lagrangian approach of the Riemann solution procedure, which was originally proposed for perfect gases, to real gases, is nontrivial and requires the development of an exact real-gas Riemann solver for the Lagrangian form of the conservation laws. Calculations including complex wave interactions of various types were conducted to test the accuracy and robustness of the approach. Attention is given to the case of 2D oblique waves' capture, where a slip line is clearly in evidence; the real gas effect is demonstrated in the case of a generic engine nozzle.
Real-time Crane Control via PC
Arm, J
2015-01-01
In this paper, creation of SCADA system, which controls and monitors model of gantry crane in real time, is described. This crane will be controlled via process station communicating with PC via Modbus TCP protocol. Moreover, HTTP server will be created to monitor crane state over intranet. On this work, the difference between real-time and fast execution will be described and it will be shown on the built system that the fast execution system can behave like a real-time system under specific...
Uncertainty and Foreign Real Estate Investment
Ping Cheng; Alan J. Ziobrowski; Royce W. Caines; Brigette J. Ziobrowski
1999-01-01
Published research has offered little evidence in support of foreign real estate investment. Most of the literature suggests that foreign real estate yields investors in mixed-asset portfolios no tangible benefits in terms of diversification gains. However all these studies were done on the basis of point estimates where they solve for a single unique optimum portfolio composition. Thus, earlier research has left the impression that foreign real estate is â€˜â€˜neverâ€™â€™ optimal. Here we us...
Quantizations of R(eal numbers)
Suzuki, Takashi
2003-01-01
Quantum real numbers are proposed by performing a quantum deformation of the standard real numbers $\\R$. We start with the q-deformed Heisenberg algebra $\\cLLq$ which is obtained by the Moyal $\\ast$-deformation of the Heisenberg algebra generated by $a$ and $\\ad$. By representing $\\cLLq$ as the algebras of $q$-differentiable functions, we derive quantum real lines from the base spaces of these functional algebras. We find that these quantum lines are discrete spaces. In particular, for the ca...
Ronald W. Kaiser
1997-01-01
The experience of the 1985-93 boom/bust in real estate has left industry players nervous about when it might happen again. This paper examines the possible causes and the periodicity of such major real estate cycles. A search of the literature for return evidence from this century suggests that there was only one other period of negative total returns for national real estate - the late 1920s and early 1930s. The evidence suggests that both periods of negative returns were caused by excessive...
Ada in Real-time Embedded System
Elnaz Ghodsvali; Rabee Sharifi Rad; Sima Sinaei
2013-01-01
Ada has an important role in the real-time/embedded/safety-critical areas. It is the only ISO-standard, object-oriented, concurrent, real-time programming language. Ada is used as a usual language for application areas such as defense embedded systems that reliability and efficiency are very essential. One of the main Ada’s characteristics in compare with other programming languages is that, Ada was developed from the ground up with capabilities that provide real-time requirements. In this st...
Filters and Ultrafilters in Real Analysis
Garcia, Max
2012-01-01
We study free filters and their maximal extensions on the set of natural numbers. We characterize the limit of a sequence of real numbers in terms of the Frechet filter, which involves only one quantifier as opposed to the three non-commuting quantifiers in the usual definition. We construct the field of real non-standard numbers and study their properties. We characterize the limit of a sequence of real numbers in terms of non-standard numbers which only requires a single quantifier as well....
Real options valuation with changing volatility
Miroslav Čulík
2016-03-01
Full Text Available This paper aims at the valuation of real options with changing volatility. Volatility change is a typical feature of real investment projects, where the riskiness of cash flow generated by the project can change significantly during the project life span. In this paper, there is explained how the problem of changing volatility can be considered if binomial lattice and replication strategy is used for real option valuation. There are recombining and non-recombining lattice used and constant and increasing volatility are analysed and results compared. In situation when volatility is changing, two approaches overcoming this problem are employed and compared.
Interactive Real-time Magnetic Resonance Imaging
Brix, Lau
Real-time acquisition, reconstruction and interactively changing the slice position using magnetic resonance imaging (MRI) have been possible for years. However, the current clinical use of interactive real-time MRI is limited due to an inherent low spatial and temporal resolution. This PhD project...... regard to optimal sampling strategy for detecting motion in four different anatomies on two different MRI scanner brands. A fully implemented interactive real-time MRI system was exploited in a group of healthy fetuses and proved its eligibility as an alternative diagnostic tool for fetal imaging...
Universidades virtuales: ¿aprendizaje real?
Valenzuela González, Jaime Ricardo
2000-01-01
1. Introducción; 2. Modalidades educativas; 3. Concepto y características de las universidades virtuales; 4. Un modelo de universidad virtual; 5. Universidades virtuales ¿aprendizaje real?; 6. Tensiones de las universidades virtuales; 7. Referencias
The multiple reals of workplace learning
Kerry Harman
2014-04-01
Full Text Available The multiple reals of workplace learning are explored in this paper. Drawing on a Foucauldian conceptualisation of power as distributed, relational and productive, networks that work to produce particular objects and subjects as seemingly natural and real are examined. This approach enables different reals of workplace learning to be traced. Data from a collaborative industry-university research project is used to illustrate the approach, with a focus on the intersecting practices of a group of professional developers and a group of workplace learning researchers. The notion of multiple reals holds promise for research on workplace learning as it moves beyond a view of reality as fixed and singular to a notion of reality as performed in and through a diversity of practices, including the practices of workplace learning researchers.
CPR: A Real Lifesaver (For Kids)
... Got Homework? Here's Help White House Lunch Recipes CPR: A Real Lifesaver KidsHealth > For Kids > CPR: A ... Let's find out how it works. What Is CPR? Cardio means "of the heart " and pulmonary means " ...
Agent Chameleons: Virtual Agents Real Intelligence
O'Hare, Gregory; Duffy, Brian; Schoen-Phelan, Bianca; Martin, Alan; Bradley, John
2003-01-01
Agent Chameleons provides virtual agents powered by real intelligence, delivering next generation autonomic entities that can seamlessly migrate, mutate and evolve on their journey between and within physical and digital information spaces.
Quantum search of a real unstructured database
Broda, Bogusław
2016-02-01
A simple circuit implementation of the oracle for Grover's quantum search of a real unstructured classical database is proposed. The oracle contains a kind of quantumly accessible classical memory, which stores the database.
Formation of real estate research theoretical basis
Sarchenko Vladimir Ivanovich
2015-04-01
Full Text Available The real estate sphere is capital intensive and more or less slowly renewable. It needs an efficient management, which requires constructive use of objective development laws, and this was repeatedly proved in practice. The development laws should be taken into account both while constructing the system of management and while providing its functioning. The article is focused on levels of real estate research which give the opportunity to theoretically summarize and identify methodological requirements, define target determinants, create models and technological integration, and also to approbate in practice the results of the research and verify or rebut the hypothesis. The different levels of abstraction in scientific researches, especially in such a large-scale sphere as real estate, allow implementing the deductive enlargement required for this sphere without loss of identity of regularities and notions. The systemic result of the authorial approach will be in the formation of methodological base containing the complete spectrum of instruments of real estate management.
International Approaches to Real Estate Development
Piyush Kumar Tiwari
2015-03-01
Squires, G. and Heurkens, E., 2015. International Approaches to Real Estate Development. Routledge, UK. ISBN (hbk: 978-0-415-82857-4, ISBN (pbk: 978-0-415-82858-1, Paperback: US$49.95, Hardback: US$165.00.
Interlacing of real zeros of Bessel functions
Palmai, Tamas
2010-01-01
We unify the known three distinct inequality sequences [Abramowitz 9.5.2] of real zeros of Bessel functions into a single, generalized one. This result is triggered by a uniqueness proof concerning a particular inverse scattering problem.
Universidades virtuales: ¿aprendizaje real?
Valenzuela González, Jaime Ricardo
2015-01-01
1. Introducción; 2. Modalidades educativas; 3. Concepto y características de las universidades virtuales; 4. Un modelo de universidad virtual; 5. Universidades virtuales ¿aprendizaje real?; 6. Tensiones de las universidades virtuales; 7. Referencias
Real Property Project Tracking System (RPPTS)
Department of Veterans Affairs — The Real Property Project Tracking System (RPPTS), formerly known as the Lease/Project Tracking (LEASE) database, contains information about lease and land projects...
Visualization in Real-Time Experiment Project
National Aeronautics and Space Administration — The objective of this project will be to migrate some of the outputs from the WFF Mission Planning Lab (MPL) into a real-time visualization system. The MPL is...
Real-reward testing for probabilistic processes
hennessy, matthew
2013-01-01
We introduce a notion of real reward testing for probabilistic processes by extending the traditional nonnegative reward testing with negative rewards. In this testing framework, the may and must preorders turn out to be the inverse relations of each other. We show that for convergent processes with finitely many states and transitions, but not in the presence of divergence, the real reward must testing preorder coincides with the nonnegative reward must testing preorder. To...
Gentrification and models for real estate analysis
Gianfranco Brusa; Alessandra Armiraglio
2013-01-01
This research propose a deep analysis of Milanese real estate market, based on data supplied by three real estate organizations; gentrification appears in some neighborhoods, such as Tortona, Porta Genova, Bovisa, Isola Garibaldi: the latest is the subject of the final analysis, by surveying of physical and social state of the area. The survey takes place in two periods (2003 and 2009) to compare the evolution of gentrification. The results of surveys has been employed in a simulation by mult...
Corporate Real Estate Function: A Review
F. Fadzil; H.Mohd Ali; A.Ariffian Bujang
2011-01-01
Nowadays, the indicators used to determine the real estate_s contribution to business activities in most organization are primarily focused on cost reduction or capital minimization. However, what is often not realized is that property can also assist revenue enhancement. This paper highlights the synthesis of previous studies from 1990 to 2010 in relation to the corporate real estate function. The considerations include the task of CRE executives that influence the shareholder_s wealth. The ...
Falling real wages during an industrial revolution
Ciccone, Antonio
1996-01-01
The Industrial Revolution was characterized by technological progress and an increasing capital intensity. Why did real wages stagnate or fall in the beginning? I answer this question by modeling the Industrial Revolution as the introduction of a relatively more capital intensive production method in a standard neoclassical framework. I show that {\\sl real wages fall in the beginning of an industrial revolution if and only if technological progress in the relatively more cap...
Nonlinear and Complex Dynamics in Real Systems
William Barnett; Apostolos Serletis; Demitre Serletis
2005-01-01
This paper was produced for the El-Naschie Symposium on Nonlinear Dynamics in Shanghai in December 2005. In this paper we provide a review of the literature with respect to fluctuations in real systems and chaos. In doing so, we contrast the order and organization hypothesis of real systems with nonlinear chaotic dynamics and discuss some techniques used in distinguishing between stochastic and deterministic behavior. Moreover, we look at the issue of where and when the ideas of chaos could p...
Risk management using big real time data
Cheng, Jie
2014-01-01
This thesis focuses on risk management of flight delay area using big real time data. It proposes two different prediction models, one is called General Long Term Departure Prediction Model and the other is named as Improved Real Time Arrival Prediction Model. By studying the main factors lead to flight delay, this thesis takes weather, carrier, National Aviation System, security and previous late aircraft as analysis factors. By utilizing our models can do not only long time b...
Integrated Control and Real-Time Scheduling
Cervin, Anton
2003-01-01
The topic of the thesis is codesign of flexible real-time control systems. Integrating control theory and real-time scheduling theory, it is possible to achieve higher resource utilization and better control performance. The integration requires new tools for analysis, design, and implementation. The problem of scheduling the individual parts of a control algorithm is studied. It is shown how subtask scheduling can reduce the input-output latency in a set of control tasks. Deadline ass...
Interferometer real time control development for SIM
Bell, Charles E.
2003-02-01
Real Time Control (RTC) for the Space Interferometry Mission will build on the real time core interferometer control technology under development at JPL since the mid 1990s, with heritage from the ground based MKII and Palomar Testbed Interferometer projects developed in the late '80s and early '90s. The core software and electronics technology for SIM interferometer real time control is successfully operating on several SIM technology demonstration testbeds, including the Real-time Interferometer Control System Testbed, System Testbed-3, and the Microarcsecond Metrology testbed. This paper provides an overview of the architecture, design, integration, and test of the SIM flight interferometer real time control to meet challenging flight system requirements for the high processor throughput, low-latency interconnect, and precise synchronization to support microarcsecond-level astrometric measurements for greater than five years at 1 AU in Earth-trailing orbit. The electronics and software architecture of the interferometer real time control core and its adaptation to a flight design concept are described. Control loops for pointing and pathlength control within each of four flight interferometers and for coordination of control and data across interferometers are illustrated. The nature of onboard data processing to fit average downlink rates while retaining post-processed astrometric measurement precision and accuracy is also addressed. Interferometer flight software will be developed using a software simulation environment incorporating models of the metrology and starlight sensors and actuators to close the real time control loops. RTC flight software and instrument flight electronics will in turn be integrated utilizing the same simulation architecture for metrology and starlight component models to close real time control loops and verify RTC functionality and performance prior to delivery to flight interferometer system integration at Lockheed Martin
Block, R.K.; Krischer, W.; Lone, S. [CERN, Geneva (Switzerland)
1989-04-01
In the context of the LAA detector development program a subgroup Real Time Data Processing has tackled the problem of intelligent triggering. The main goal of this group is to show how fast digital devices, implemented as custom-made or commercial processors, can execute some basic algorithms, and how they can be embedded in the data flow between detector readout components and fully programmable commercial processors, which are expected to be the final data processing filter in real time.
Real Time Information Fusion in Military Systems
E. Bhagiratharao
1990-01-01
Full Text Available With the proliferation of sensors on platforms like battle ships and aircraft, the information to be handled by the battlefield commanders has significantly increased in the recent time. From a deluge of information flowing from sensors, the battlefield commander is required to make situation assessment in real-time and take appropriate action. Recent studies by cognitive scientists have indicated that decision making by individuals as well as a team suffer from several biases. For these two reasons, the battlefield commanders need assistance of real-time information fusion systems to take objective assessment of highly dynamic battle situation in real-time information fusion systems to take objective assessment of a highly dynamic battle situation in real-time. The real-time information fusion systems at a single platform level as well as that applicable for geographically distributed platforms is discussed in detail in this paper. It was concluded that by carrying out these activities at the platform level as well as at 'global' level involving several platforms, the limitations in performance of any sensor due to propagation effects or due to enemy counter measures can be significantly minimised or totally eliminated. At the same time the functional effectiveness of each sensor onboard different platforms, becomes better than when it had to operate autonomously within the real-time information fusion facility. By carrying out global real-time information fusion activity in a theatre of war, all the platforms operating in the area will have the benefit of the best sensor in that area on each aspect of the capability. A few examples of real-time information fusion system are also discussed.
Real Estate and Capital Gains Debate
Michael Hudson; Kris Feder
1997-01-01
This working paper seeks to elucidate the role of real estate in the capital gains issue, indicating the quantitative orders of magnitude involved. We offer two main observations. First, generous capital consumption allowances (CCAs) greatly magnify the proportion newly constructed buildings, of course, but also on land and old buildings being sold and resold. Our tax code allows for properties to be re- depreciated by their new owners after a sale or swap, permitting real estate investors to...
Bringing More Competition to Real Estate Brokerage
Gurman, Jesse; Hahn, Robert W.; Litan, Robert E.
2005-01-01
This paper provides an economic analysis of the residential real estate brokerage industry. We find that the traditional model for residential real estate brokerage services may be dated, and could be improved substantially with some public policy interventions that spur innovation. We believe that there are numerous barriers to entry that are slowing the emergence of new models for serving consumers. Some of these barriers are likely to be anti-competitive. Examples include discrimination ag...
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2007-01-01
@@ Prop: "The Real Estate industry in Beijing has dept and average 16.3% lever of growth overthe past 5years.Additionally,the investment in real estatemakes up more than 60% of hte annual investment in nonliquid had increased by 9.8%.From the time when Beijinwas chosen to hold hte 2008 Olympic Games,the housingprice ing Beijing has doubled;however,the volume of busimess has already decreased.
REAL TIME WIRELESS AIR POLLUTION MONITORING SYSTEM
Raja Vara Prasad Y; Mirza Sami Baig; Mishra, Rahul K; Rajalakshmi, P.; U. B. Desai; S. N. Merchant
2011-01-01
Air pollution has significant influence on the concentration of constituents in the atmosphere leading to effects like global warming and acid rains. To avoid such adverse imbalances in the nature, an air pollution monitoring system is utmost important. This paper attempts to develop an effective solution for pollution monitoring using wireless sensor networks (WSN) on a real time basis namely real time wireless air pollution monitoring system. Commercially available discrete gas sensors for ...
A basic course in real analysis
Kumar, Ajit
2014-01-01
Real Number SystemAlgebra of the Real Number System Upper and Lower Bounds LUB Property and Its Applications Absolute Value and Triangle Inequality Sequences and Their Convergence Sequences and Their Convergence Cauchy Sequences Monotone Sequences Sandwich Lemma Some Important Limits Sequences Diverging to Subsequences Sequences Defined Recursively Continuity Continuous Functions Definition of Continuity Intermediate Value Theorem .Extreme Value Theorem Monotone Functions Limits Uniform Continuity Continuous Extensions Differentiation Differentiability of Functions Mean Value Theorems L'Hospit
Real Hypersurfaces of a Complex Projective Space
Sharief Deshmukh
2011-05-01
In this paper, we classify real hypersurfaces in the complex projective space $CP\\frac{n+1}{2}$ whose structure vector field is a -analytic vector field (a notion similar to analytic vector fields on complex manifolds). We also define Jacobi-type vector fields on a Riemannian manifold and classify real hypersurfaces whose structure vector field is a Jacobi-type vector field.
Creating Real-Time Embodied Autonomous Agents
无
2000-01-01
@@ A challenging research area for computer graphics and virtual environments (VE) is training interpersonal interactions. In such a system, at least one person is the VE participant, while several more virtual human agents (represented by human-like, embodied models) are engaged in activities in the same virtual space. The participants, whether live or virtual, should interact as if all were real. This means that the virtual agents must have several characteristics afforded to real people, including the following:
Real-time information from seismic networks
Köhler, Nina
2010-01-01
In this thesis, the performance of a novel methodology for the real-time estimation of seismic source parameters is evaluated which can be used in earthquake early warning systems. The method, PreSEIS, uses artificial neural networks to map seismic observations from a network of sensors onto likely source parameters. The method is veryfied using two real earthquake datasets, as well as a synthetic earthquake dataset to evaluate the performance of the Istanbul early warning system.
Real estate indicators and financial stability
Bank for International Settlements
2005-01-01
The papers in this volume were presented at a joint conference on Real Estate Indicators and Financial Stability organised by the International Monetary Fund and the Bank for International Settlements in Washington, D.C., on 27-28 October 2003. The purpose of this conference was to discuss and explore the theoretical as well as the practical issues underlying the development and use of real estate indicators in assessing financial stability. A key aspect of the current attention on financial ...
Integrative Process-Oriented Real Estate Marketing
M. Wiffler
2005-01-01
Real estate marketing is still focused on McCarthy's 4-P or marketing-mix approach. In today's volatile markets the 4-P approach will no longer lead to satisfying results. It neglects an inherent strategic approach, lacks a process-oriented view and is rather focussed on the product than the customer and the customer's needs. Therefore, the author presents an integrative process oriented real estate marketing approach. Firstly, this approach is aligned with the property's position in its life...
Real-time interferometric synthetic aperture microscopy
Ralston, Tyler S.; Marks, Daniel L.; Carney, P. Scott; Boppart, Stephen A.
2008-01-01
An interferometric synthetic aperture microscopy (ISAM) system design with real-time 2D cross-sectional processing is described in detail. The system can acquire, process, and display the ISAM reconstructed images at frame rates of 2.25 frames per second for 512 × 1024 pixel images. This system provides quantitatively meaningful structural information from previously indistinguishable scattering intensities and provides proof of feasibility for future real-time ISAM systems.
Real-time interferometric synthetic aperture microscopy.
Ralston, Tyler S; Marks, Daniel L; Carney, P Scott; Boppart, Stephen A
2008-02-18
An interferometric synthetic aperture microscopy (ISAM) system design with real-time 2D cross-sectional processing is described in detail. The system can acquire, process, and display the ISAM reconstructed images at frame rates of 2.25 frames per second for 512 X 1024 pixel images. This system provides quantitatively meaningful structural information from previously indistinguishable scattering intensities and provides proof of feasibility for future real-time ISAM systems. PMID:18542337
Real time monitoring of electron processors
A real time radiation monitor (RTRM) has been developed for monitoring the dose rate (current density) of electron beam processors. The system provides continuous monitoring of processor output, electron beam uniformity, and an independent measure of operating voltage or electron energy. In view of the device's ability to replace labor-intensive dosimetry in verification of machine performance on a real-time basis, its application to providing archival performance data for in-line processing is discussed. (author)
Coinductive Formal Reasoning in Exact Real Arithmetic
Niqui, Milad
2008-01-01
In this article we present a method for formally proving the correctness of the lazy algorithms for computing homographic and quadratic transformations -- of which field operations are special cases-- on a representation of real numbers by coinductive streams. The algorithms work on coinductive stream of M\\"{o}bius maps and form the basis of the Edalat--Potts exact real arithmetic. We use the machinery of the Coq proof assistant for the coinductive types to present the formalisation. The form...
Schoeberl, Martin
2015-01-01
Java served well as a general-purpose language. However, during its two decades of constant change it has gotten some weight and legacy in the language syntax and the libraries. Furthermore, Java's success for real-time systems is mediocre. Scala is a modern object-oriented and functional language...... with interesting new features. Although a new language, it executes on a Java virtual machine, reusing that technology. This paper explores Scala as language for future real-time systems....
Real-Time Scheduling for Software Prototyping
Luqi; Shing, M
1996-01-01
This paper presents several real-time scheduling algorithms developed to support rapid prototyping of embedded systems using the Computer Aided Prototyping System (CAPS). The CAPS tools are based on the Prototyping System Description Language (PSDL), which is a high-level language designed specifically to support the conceptual modeling of real-time embedded systems. This paper describes the scheduling algorithms used in CAPS along with the associated timing constraint and hardwar...
A monadic, functional implementation of real numbers
O'Connor, Russell
2006-01-01
Large scale real number computation is an essential ingredient in several modern mathematical proofs. Because such lengthy computations cannot be verified by hand, some mathematicians want to use software proof assistants to verify the correctness of these proofs. This paper develops a new implementation of the constructive real numbers and elementary functions for such proofs by using the monad properties of the completion operation on metric spaces. Bishop and Bridges's notion of regular se...
MINNESOTA FARM REAL ESTATE SALES: 1990 - PRESENT
Steven J. TAFF
2002-01-01
This publication is a snapshot of the Minnesota Farm Real Estate Sales web site (http://www.apec.umn.edu/faculty/sjtaff/salesstudy) as of May 5, 2002. It will be formally "reissued" (the web site will be recaptured) each Spring, as new sales data become available. We no longer distribute a separate farm real estate report in the Minnesota Agricultural Economist (now the Minnesota Applied Economist). The site consists largely of graphs and tables summarizing sales over the past decade. It prov...
MINNESOTA FARM REAL ESTATE SALES: 1990 - 2002
Steven J. TAFF
2003-01-01
This publication is a snapshot of the Minnesota Farm Real Estate Sales web site (http://www.apec.umn.edu/faculty/sjtaff/salesstudy) as of May 2, 2003. It will be formally "reissued" (the web site will be recaptured) each Spring, as new sales data become available. We no longer distribute a separate farm real estate report in the Minnesota Agricultural Economist (now the Minnesota Applied Economist). The site consists largely of graphs and tables summarizing sales over the past decade. It prov...
Sticky prices and sectoral real exchange rates
Patrick J. Kehoe; Virgiliu Midrigan
2007-01-01
The classic explanation for the persistence and volatility of real exchange rates is that they are the result of nominal shocks in an economy with sticky goods prices. A key implication of this explanation is that if goods have differing degrees of price stickiness then relatively more sticky goods tend to have relatively more persistent and volatile good-level real exchange rates. Using panel data, we find only modest support for these key implications. The predictions of the theory for pers...
Virtual Betti numbers of real algebraic varieties
McCrory, Clint; Parusinski, Adam
2002-01-01
The weak factorization theorem for birational maps is used to prove that for all nonnegative i the ith mod 2 Betti number of compact nonsingular real algebraic varieties has a unique extension to a "virtual Betti number" beta_i defined for all real algebraic varieties, such that if Y is a closed subvariety of X, then beta_i(X) = beta_i(X\\Y) + beta_i(Y).
Real variables with basic metric space topology
Ash, Robert B
2009-01-01
Designed for a first course in real variables, this text presents the fundamentals for more advanced mathematical work, particularly in the areas of complex variables, measure theory, differential equations, functional analysis, and probability. Geared toward advanced undergraduate and graduate students of mathematics, it is also appropriate for students of engineering, physics, and economics who seek an understanding of real analysis.The author encourages an intuitive approach to problem solving and offers concrete examples, diagrams, and geometric or physical interpretations of results. Deta
Towards validated real-time software
Bertin, V.; Poize, M.; Pulou, J.; Sifakis, J
2000-01-01
We present a tool for the design and validation of embedded real time applications. The tool integrates two approaches: the use of the synchronous programming language, ESTEREL for design, and the application of model checking techniques for validation of real time properties. Validation is carried out on a global formal model (timed automata) taking into account the effective implementation of the application on the target hardware architecture as well as its external environment behavior
Complex structure of a real Clifford algebra
Hanson, Jason
2011-01-01
The classification of real Clifford algebras in terms of matrix algebras is well--known. Here we consider the real Clifford algebra ${\\mathcal Cl}(r,s)$ not as a matrix algebra, but as a Clifford module over itself. We show that ${\\mathcal Cl}(r,s)$ possesses a basis independent complex structure only when the square of the volume element $\\omega$ is -1, in which case it is uniquely given up to sign by right multiplication with $\\omega$.
Purchasing Power Parities and Real Expenditures
Asian Development Bank
2014-01-01
This report presents the results of purchasing power parities (PPPs) in the 2011 International Comparison Program in Asia and the Pacific and background information on the concepts that underpin the results. The PPPs are disaggregated by major economic aggregates that enable robust cross-country comparisons. It includes variables such as per capita real gross domestic product, real per capita actual final consumption expenditure for measures of economic well-being, gross fixed capital formati...
Biological Sex Determines Whether Faces Look Real
Balas, Benjamin
2013-01-01
Judging whether a face is real or artificial can be done relatively rapidly and accurately, even when visual information is substantially impoverished. The perception of animacy in the face also has several interesting properties that may reflect both the underlying “tuning” of face space to preferentially represent real face appearance and the diagnosticity of individual features for categorizing faces as animate or inanimate. In the current study, we examined how sex categories interact wit...
Quadratic Interval Refinement for Real Roots
Abbott, John
2012-01-01
We present a new algorithm for refining a real interval containing a single real root: the new method combines characteristics of the classical Bisection algorithm and Newton's Iteration. Our method exhibits quadratic convergence when refining isolating intervals of simple roots of polynomials (and other well-behaved functions). We assume the use of arbitrary precision rational arithmetic. Unlike Newton's Iteration our method does not need to evaluate the derivative.
Picard-Vessiot theory for real partial differential fields
Crespo, Teresa; Hajto, Zbigniew
2013-01-01
We prove the existence of real Picard-Vessiot extensions for real partial differential fields with real closed field of constants. We establish a Galois correspondence theorem for these Picard-Vessiot extensions and characterize real Liouville extensions of real partial differential fields.
33 CFR 211.1 - Real estate defined.
2010-07-01
... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Real estate defined. 211.1... DEFENSE REAL ESTATE ACTIVITIES OF THE CORPS OF ENGINEERS IN CONNECTION WITH CIVIL WORKS PROJECTS Real Estate; General § 211.1 Real estate defined. The term real estate as used in this part includes...
32 CFR 644.23 - Real Estate Planning Documents.
2010-07-01
... 32 National Defense 4 2010-07-01 2010-07-01 true Real Estate Planning Documents. 644.23 Section... PROPERTY REAL ESTATE HANDBOOK Project Planning Military (army and Air Force) and Other Federal Agencies § 644.23 Real Estate Planning Documents. (a) Real Estate Planning Reports. (1) A Real Estate...
Benefits of real-time gas management
In today's competitive gas gathering, processing, storage and transportation business environment, the requirements to do business are continually changing. These changes arise from government regulations such as the amendments to the Clean Air Act concerning the environment and FERC Order 636 concerning business practices. Other changes are due to advances in technology such as electronic flow measurement (EFM) and real-time communications capabilities within the gas industry. Gas gathering, processing, storage and transportation companies must be flexible in adapting to these changes to remain competitive. These dynamic requirements can be met with an open, real-time gas management computer information system. Such a system provides flexible services with a variety of software applications. Allocations, nominations management and gas dispatching are examples of applications that are provided on a real-time basis. By providing real-time services, the gas management system enables operations personnel to make timely adjustments within the current accounting period. Benefits realized from implementing a real-time gas management system include reduced unaccountable gas, reduced imbalance penalties, reduced regulatory violations, improved facility operations and better service to customers. These benefits give a company the competitive edge. This article discusses the applications provided, the benefits from implementing a real-time gas management system, and the definition of such a system
Real Gromov-Witten Theory in All Genera and Real Enumerative Geometry, II
Georgieva, Penka
2015-01-01
The first part of this work constructs positive-genus real Gromov-Witten invariants of real-orientable symplectic manifolds of odd "complex" dimensions; the present part focuses on their properties that are essential for actually working with these invariants. We determine the compatibility of the orientations on the moduli spaces of real maps constructed in the first part with the standard node-identifying immersion of Gromov-Witten theory. We also compare these orientations with alternative ways of orienting the moduli spaces of real maps that are available in special cases. In a sequel, we use the properties established in this paper to compare real Gromov-Witten and enumerative invariants, to describe equivariant localization data that computes the real Gromov-Witten invariants of odd-dimensional projective spaces, and to establish vanishing results for these invariants in the spirit of Walcher's predictions.
Lyon, Robert
The document contains a summary report of a community college real estate teachers' workshop organized to develop course outlines for the various areas in the real estate curriculum. Curriculum outlines are presented, with varying degrees of detail included, for the following eight subjects: real estate appraisal; real estate brokage; real estate…
The impact of real estate portfolio composition on the Italian real estate funds performance
Gigante, M.
2011-01-01
In Italy the criteria for selecting real estate investments are subjects of discussion between practitioners and academics, also because the Italian real estate funds have grown considerably in recent years in terms of both asset under management size and of number of funds. The aim of paper is to investigate the investment policies and composition choices of Italian retail funds portfolio, looking at the impact on funds performance measured through the Sharpe ratio, widely used in real estat...
Service Perspective in Real Estate Management - A Study of the Swedish Real Estate Industry
Palm, P.
2013-01-01
Purpose – The purpose of this paper is to investigate the Swedish real estate industries shift towards a service focus. The focus is on how service companies (such as commercial real estate companies) consider their business, if they see themselves as deliverers of a product or service. Design/methodology/approach – The paper discusses the characteristics of the Swedish real estate industry and the relation to the theory of Service dominant logic. The study consist of both an inventory of ann...
The source of real and nominal exchange rate fluctuations in Thailand: Real shock or nominal shock
Le Thanh, Binh
2015-01-01
This paper examines the source of exchange rate fluctuations in Thailand. We employed a structural vector auto-regression (SVAR) model with the long-run neutrality restriction of Blanchard and Quah (1989) to investigate the changes in real and nominal exchange rates from 1994 to 2015. In this paper, we assume that there are two types of shocks which related to exchange rate movements: real shocks and nominal shocks. The empirical analysis indicates that real shocks are the fundamental compon...
Predicting Securitized Real Estate Returns: Financial and Real Estate Factors vs. Economic Variables
Serrano, Camilo; Hoesli, Martin E.
2009-01-01
Securitized real estate returns have traditionally been forecasted using economic variables. However, no consensus exists regarding the variables to use. Financial and real estate factors have recently emerged as an alternative set of variables useful in forecasting securitized real estate returns. This paper examines whether the predictive ability of the two sets of variables differs. We use fractional cointegration analysis to identify whether long-run nonlinear relations exist between secu...
A model of real estate and psychological factors in decision-making to buy real estate
Bojan Grum; Darja Kobal Grum
2015-01-01
This article explores the psychological characteristics of potential real estate buyers connected with their decision to buy. Through a review of research, it reveals that most studies of psychological factors in the decision to buy real estate have a partial and dispersed orientation, and examine individual factors independently. It appears that the research area is lacking clearly defined models of psychological factors in the decision to buy real estate that would integrally and relational...
State Pension Funds: What is Their Future in Real Estate?
Clarence C. Elebash; William A. Christianses
1989-01-01
This study investigates state pension plan participation in the real estate equity market and pension management attitudes toward the ownership of real estate. A series of hypotheses regarding the motivating factors behind state ownership of real estate equities is investigated.
REAL TIME SYSTEM OPERATIONS 2006-2007
Eto, Joseph H.; Parashar, Manu; Lewis, Nancy Jo
2008-08-15
The Real Time System Operations (RTSO) 2006-2007 project focused on two parallel technical tasks: (1) Real-Time Applications of Phasors for Monitoring, Alarming and Control; and (2) Real-Time Voltage Security Assessment (RTVSA) Prototype Tool. The overall goal of the phasor applications project was to accelerate adoption and foster greater use of new, more accurate, time-synchronized phasor measurements by conducting research and prototyping applications on California ISO's phasor platform - Real-Time Dynamics Monitoring System (RTDMS) -- that provide previously unavailable information on the dynamic stability of the grid. Feasibility assessment studies were conducted on potential application of this technology for small-signal stability monitoring, validating/improving existing stability nomograms, conducting frequency response analysis, and obtaining real-time sensitivity information on key metrics to assess grid stress. Based on study findings, prototype applications for real-time visualization and alarming, small-signal stability monitoring, measurement based sensitivity analysis and frequency response assessment were developed, factory- and field-tested at the California ISO and at BPA. The goal of the RTVSA project was to provide California ISO with a prototype voltage security assessment tool that runs in real time within California ISO?s new reliability and congestion management system. CERTS conducted a technical assessment of appropriate algorithms, developed a prototype incorporating state-of-art algorithms (such as the continuation power flow, direct method, boundary orbiting method, and hyperplanes) into a framework most suitable for an operations environment. Based on study findings, a functional specification was prepared, which the California ISO has since used to procure a production-quality tool that is now a part of a suite of advanced computational tools that is used by California ISO for reliability and congestion management.
An Overview of U.S. Farm Real Estate Markets
Forster, D. Lynn
2006-01-01
This paper offers an overview of U.S. farm real estate markets. Major uses of land, location of farm real estate, and ownership patterns are summarized. Characteristics of participants in farm real markets are reviewed. Farm real estate values and rents examined, and factors affecting farm real estate values are reviewed, including the effects of conversion of farm real estate to other uses. Finally, historic returns to farmland owners are summarized.
WHY VOLATILITY IS AN INAPPROPRIATE RISK MEASURE FOR REAL ESTATE
Müller, M.; C. Lausberg
2010-01-01
The adequate measurement of real estate risk is of utmost importance for asset management and real estate portfolio management. Most real estate academics agree that volatility, commonly used as a measure of real estate risk, is inappropriate for that purpose. However, volatility is still a favored measure of many practitioners, especially for comparing the risk of real estate with other assets such as securities. And even real estate academics still use this measure due to its simplicity and...
ESTUDO DE CASO: SUSTENTABILIDADE DO BANCO REAL
NOLETO, Caroline Paschoim
2010-04-01
Full Text Available For some time, the Banco Real has invested in suitability, because it realized the importance of this question to the society. To carry out this work, a bibliographic research was made by the Banco Real about the practices of suitability, through the Report of Suitability in 2005 and 2006, with collection of information ofthe actions carried out and also its results. The results of the research will be presented in several projects carried out by the Banco Real, which show in each action the type of the return obtained during 2005 and 2006. We can conclude that the return obtained is relevant, because beyond the financial benefits conceived by the Program “Amigo Real”, it also has the question of the good image of the Company in the face of the market, due to itsposture. Another big benefit conquered by the adoption of the suitability was the introduction of a system of environmental administration in the home office of the own Bank, in São Paulo, so the Banco Real was contemplated with the ISO 14001.Já há algum tempo, o Banco Real tem investido em sustentabilidade porque percebeu a importância dessa questão para a sociedade. Para realização do trabalho em questão foi feito um levantamentobibliográfico das práticas de sustentabilidade praticadas pelo Banco Real, através do Relatório de Sustentabilidade 2005 e 2006 com coleta de informações das ações realizadas e também os seus resultados. Os resultados da pesquisa foram apresentados em vários projetos realizados pelo Banco Real e que demonstram emcada ação o tipo de retorno obtido durante os anos de 2005 e 2006. Pode-se concluir que o retorno obtido é relevante, pois além dos benefícios financeiros gerados pelo Programa Amigo Real, também tem a questão da boa imagem da Empresa perante o mercado, devido a sua postura. Outro grande benefício conquistado por meio da adoção da sustentabilidade foi à implantação de um sistema de gestão ambiental na sede do pr
Real-time control software on NSTX
Mastrovito, D. E-mail: dmastrovito@pppl.gov; Ferron, J.; Gates, D.; Gibney, T.; Johnson, R
2004-06-01
The National Spherical Tokamak Experiment (NSTX) depends on high speed, real-time control to establish initial magnetic field configurations, drive plasma current, and control plasma position and shape. The control required on NSTX is achieved through the combined efforts of several applications developed collaboratively including the power supply real-time controller (PSRTC) and the plasma control system (PCS). The PSRTC communicates with the PCS receiving from the PCS real-time voltage controls and is responsible for supplying dc power to the NSTX poloidal field, toroidal field and Ohmic heating coils. The PCS, which was designed at general atomics, controls the data acquisition, gas injection, plasma current, and plasma shape, including a real-time EFIT and isoflux algorithm for equilibrium reconstruction. Modular control algorithms, specific to NSTX, were written and incorporated into the PCS. The NSTX control system is equipped with 160 channels of fast real-time data acquisition and eight 333 MHz G4 processors, which perform the supervision, position, shape, and performance control. After a discharge, the acquired data and setup parameters are transferred to an MDSPlus central archive for later inspection and can be used to repeat previous machine configurations.
Scene independent real-time indirect illumination
Frisvad, Jeppe Revall; Christensen, Niels Jørgen; Falster, Peter
2005-01-01
A novel method for real-time simulation of indirect illumination is presented in this paper. The method, which we call Direct Radiance Mapping (DRM), is based on basal radiance calculations and does not impose any restrictions on scene geometry or dynamics. This makes the method tractable for rea......, which can draw further advantages from upcoming GPU functionalities. The method has been tested for moderately sized scenes with close to real-time frame rates and it scales with interactive frame rates for more complex scenes.......-time rendering of arbitrary dynamic environments and for interactive preview of feature animations. Through DRM we simulate two diffuse reflections of light, but can also, in combination with traditional real-time methods for specular reflections, simulate more complex light paths. DRM is a GPU-based method...
Real depletion in nodal diffusion codes
The fuel depletion is described by more than one hundred fuel isotopes in the advanced lattice codes like HELIOS, but only a few fuel isotopes are accounted for even in the advanced steady-state diffusion codes. The general assumption that the number densities of the majority of the fuel isotopes depend only on the fuel burnup is seriously in error if high burnup is considered. The real depletion conditions in the reactor core differ from the asymptotic ones at the stage of lattice depletion calculations. This study reveals which fuel isotopes should be explicitly accounted for in the diffusion codes in order to predict adequately the real depletion effects in the core. A somewhat strange conclusion is that if the real number densities of the main fissionable isotopes are not explicitly accounted for in the diffusion code, then Sm-149 should not be accounted for either, because the net error in k-inf is smaller (Authors)
The situation in the area of testing real-time-software is unsatisfactory. During the first phase of the project PROMOTE (prozessorientiertes Modul- und Gesamttestsystem) an analysis of the momentary situation took place, results of which are summarized in the following study about some user interviews and an analysis of relevant literature. 22 users (industry, software-houses, hardware-manufacturers, and institutes) have been interviewed. Discussions were held about reliability of real-time software with special interest to error avoidance, testing, and debugging. Main aims of the analysis of the literature were elaboration of standard terms, comparison of existing test methods and -systems, and the definition of boundaries to related areas. During the further steps of this project some means and techniques will be worked out to systematically test real-time software. (orig.)
Development of Real Time Multitask Kernel
B. Sahli
2008-01-01
Full Text Available This study describes real-time kernel essential mechanisms and deals with the implementation of a real-time multitasks executive. To make more advantage of microprocessors in applications involving many functions simultaneously, our real-time kernel provides a multiprogramming environment in which many independent multitasking application programmes may execute and provides facilities to manage efficiently the processes (tasks and communicate between them. These facilities are provided by system calls that handle data structures namely tasks, semaphores, messages, events flag, resources, mail-boxes, queues and interruptions. Present kernel is preemptive and priorities assigned to tasks are dynamic, the kernel manages up to 63 task levels (63 is the lowest priority level assigned to the idle task. Round robin scheduling is not used here.
Coinductive Formal Reasoning in Exact Real Arithmetic
Niqui, Milad
2008-01-01
In this article we present a method for formally proving the correctness of the lazy algorithms for computing homographic and quadratic transformations -- of which field operations are special cases-- on a representation of real numbers by coinductive streams. The algorithms work on coinductive stream of M\\"obius maps and form the basis of the Edalat--Potts exact real arithmetic. We use the machinery of the Coq proof assistant for the coinductive types to present the formalisation. The formalised algorithms are only partially productive, i.e., they do not output provably infinite streams for all possible inputs. We show how to deal with this partiality in the presence of syntactic restrictions posed by the constructive type theory of Coq. Furthermore we show that the type theoretic techniques that we develop are compatible with the semantics of the algorithms as continuous maps on real numbers. The resulting Coq formalisation is available for public download.
Deterministic Real-time Thread Scheduling
Yun, Heechul; Sha, Lui
2011-01-01
Race condition is a timing sensitive problem. A significant source of timing variation comes from nondeterministic hardware interactions such as cache misses. While data race detectors and model checkers can check races, the enormous state space of complex software makes it difficult to identify all of the races and those residual implementation errors still remain a big challenge. In this paper, we propose deterministic real-time scheduling methods to address scheduling nondeterminism in uniprocessor systems. The main idea is to use timing insensitive deterministic events, e.g, an instruction counter, in conjunction with a real-time clock to schedule threads. By introducing the concept of Worst Case Executable Instructions (WCEI), we guarantee both determinism and real-time performance.
Real-time gauge/gravity duality
Skenderis, Kostas
2008-01-01
We present a general prescription for the holographic computation of real-time n-point functions in non-trivial states. In QFT such real-time computations involve a choice of a time contour in the complex time plane. The holographic prescription amounts to ``filling in'' this contour with bulk solutions: real segments of the contour are filled in with Lorentzian solutions while imaginary segments are filled in with Riemannian solutions and appropriate matching conditions are imposed at the corners of the contour. We illustrate the general discussion by computing the 2-point function of a scalar operator using this prescription and by showing that this leads to an unambiguous answer with the correct i epsilon insertions.
Performance of the RealStar Chikungunya Virus Real-Time Reverse Transcription-PCR Kit▿
Panning, Marcus; Hess, Markus; Fischer, Waldemar; Grywna, Klaus; Pfeffer, Martin; Drosten, Christian
2009-01-01
A novel commercial Chikungunya virus real-time reverse transcription-PCR (RT-PCR) kit was evaluated on a comprehensive panel of original patient samples. The assay was 100% sensitive and specific in comparison to a published real-time RT-PCR. Viral loads from both assays were highly correlated. The kit proved to be suitable for routine use in patient care.
7 CFR 1955.139 - Disposition of real property rights and title to real property.
2010-01-01
... 7 Agriculture 14 2010-01-01 2009-01-01 true Disposition of real property rights and title to real property. 1955.139 Section 1955.139 Agriculture Regulations of the Department of Agriculture (Continued) RURAL HOUSING SERVICE, RURAL BUSINESS-COOPERATIVE SERVICE, RURAL UTILITIES SERVICE, AND FARM SERVICE AGENCY, DEPARTMENT OF AGRICULTURE...
Real-time systems scheduling 2 focuses
Chetto, Maryline
2014-01-01
Real-time systems are used in a wide range of applications, including control, sensing, multimedia, etc. Scheduling is a central problem for these computing/communication systems since it is responsible for software execution in a timely manner. This book, the second of two volumes on the subject, brings together knowledge on specific topics and discusses the recent advances for some of them. It addresses foundations as well as the latest advances and findings in real-time scheduling, giving comprehensive references to important papers, but the chapters are short and not overloaded with co
Residential investment over the real estate cycle
John Krainer
2006-01-01
Much attention recently has been given to the possibility of a slowdown in the U.S. residential real estate market. While real residential investment has continued to grow and existing house prices have held up through the first quarter of 2006, analysts have pointed to other signs of slowing. Two commonly cited indicators are an apparent slowing of sales of new and existing homes and a buildup of inventories of new homes in many markets. In this Economic Letter, I characterize past episodes ...
Historic Turning Points in Real Estate
Shiller, Robert J.
2007-01-01
This paper looks for markers of ends of real estate booms or busts. The changes in market psychology and related indicators that occurred at real estate market turning points in the United States since the 1980s are compared with changes at turning points in the more distant past. In all these episodes, changes in an atmosphere of optimism about the future course of home prices, changes in public interpretation of the boom, as well as evidence of supply response to the high prices of a boom a...
MINIX4RT: Real-time Semaphores
Pessolani, Pablo Andrés
2008-01-01
MINIX4RT es una extensión del conocido Sistema Operativo MINIX que incorpora servicios de Tiempo Real Estricto en un nuevo microkernel pero manteniendo compatibilidad con las versiones anteriores del MINIX estándar. Los semáforos son el mecanismo primitivo para la sincronización y exclusion mutua en varios sistemas operativos, pero MINIX no brinda esa facilidad. Se adicionaron semáforos a MINIX4RT y, como éste es un Sistema Operativo de Tiempo Real, deben reunir ciertos requisitos de procesam...
Real Time Implementation Of Face Recognition System
Megha Manchanda
2014-10-01
Full Text Available This paper proposes face recognition method using PCA for real time implementation. Nowadays security is gaining importance as it is becoming necessary for people to keep passwords in their mind and carry cards. Such implementations however, are becoming less secure and practical, also is becoming more problematic thus leading to an increasing interest in techniques related to biometrics systems. Face recognition system is amongst important subjects in biometrics systems. This system is very useful for security in particular and has been widely used and developed in many countries. This study aims to achieve face recognition successfully by detecting human face in real time, based on Principal Component Analysis (PCA algorithm.
Real analysis modern techniques and their applications
Folland, Gerald B
1999-01-01
An in-depth look at real analysis and its applications-now expanded and revised.This new edition of the widely used analysis book continues to cover real analysis in greater detail and at a more advanced level than most books on the subject. Encompassing several subjects that underlie much of modern analysis, the book focuses on measure and integration theory, point set topology, and the basics of functional analysis. It illustrates the use of the general theories and introduces readers to other branches of analysis such as Fourier analysis, distribution theory, and probability theory.This edi
Capital Account Liberalization, Real Wages, and Productivity
Peter Blair Henry; Diego Sasson
2008-01-01
For three years after the typical developing country opens its stock market to inflows of foreign capital, the average annual growth rate of the real wage in the manufacturing sector increases by a factor of seven. No such increase occurs in a control group of developing countries. The temporary increase in the growth rate of the real wage permanently drives up the level of average annual compensation for each worker in the sample by 752 US dollars -- an increase equal to more than a quarter ...
Diferentes construcciones del número real
Calderón Ramos, Néstor Octavio
2014-01-01
En este trabajo se hace una revisión histórica de la construcción rigurosa del número real, en particular en los trabajos de Richard Dedekind cuando definió los números reales a través de cortaduras y Georg Cantor cuando lo hizo a través de sucesiones de Cauchy e intervalos encajados. Se utiliza estas construcciones para plantear una propuesta didáctica que permita a los estudiantes de grado once de la educación media, diferenciar los números racionales de los números irracionales
Solder, Ulrich; Graefe, Volker
1991-03-01
An algorithm working on monocular gray-scale image sequences for object detection combined with a road tracker is presented. This algorithm appropriate for the real-time demands of an autonomous car driving with speeds over 40 km/h may be used for triggering obstacle avoidance maneuvers such as coming to a safe stop automatically in front of an obstacle or following another car. Moving and static objects have been detected in real-world experiments on various types of roads even under unfavorable weather conditions. . Morgenthaler and
The Performance of Real Estate Activities
Grauzľová, Žaneta
2011-01-01
The aim of this thesis is to define problems in the field of real-estate activities related to business ethics, to explore causes of their origin and to search for possible solutions to improve the present condition. We will get acquainted with the conception of business ethics, their history, place of origin, driving motives and we will learn what the most widely used instruments of business ethics are. This work is dedicated especially to those problems of the Czech real-estate market which...
Real analysis and probability solutions to problems
Ash, Robert P
1972-01-01
Real Analysis and Probability: Solutions to Problems presents solutions to problems in real analysis and probability. Topics covered range from measure and integration theory to functional analysis and basic concepts of probability; the interplay between measure theory and topology; conditional probability and expectation; the central limit theorem; and strong laws of large numbers in terms of martingale theory.Comprised of eight chapters, this volume begins with problems and solutions for the theory of measure and integration, followed by various applications of the basic integration theory.
Machine vision for real time orbital operations
Vinz, Frank L.
1988-01-01
Machine vision for automation and robotic operation of Space Station era systems has the potential for increasing the efficiency of orbital servicing, repair, assembly and docking tasks. A machine vision research project is described in which a TV camera is used for inputing visual data to a computer so that image processing may be achieved for real time control of these orbital operations. A technique has resulted from this research which reduces computer memory requirements and greatly increases typical computational speed such that it has the potential for development into a real time orbital machine vision system. This technique is called AI BOSS (Analysis of Images by Box Scan and Syntax).
Real Estate Versus Financial Wealth in Consumption
John D. Benjamin; Peter Chinloy; G. Donald Jud
2004-01-01
The consumption function for the U.S. economy is estimated with real estate and financial wealth for quarterly data for 1952:1--2001:4. An additional dollar of real estate wealth increases consumption by 8 cents in the current year, as compared with only 2 cents for financial wealth. The results are consistent with theoretical bounds on the marginal propensity to consume from aggregate wealth. The decline in the stock market during 2000--2001 had a limited impact on aggregate demand in part b...
Do Real Estate Loans Affect Economic Activity?
Z. Onder; S.Ozyildirim Gunalay; S. Ozyildirim; Y. Gunalay
2007-01-01
Real estate, especially housing, has an important share in the nationís wealth. For example, real estate constitutes 48.8% of total wealth in the world in 1991. Moreover, housing construction and its financing are two important factors that affect economic development in developed and developing countries. Although the mortgage system has been developing in the 1980s and 1990s in the developing economies, the impact of mortgage credits on the economy has been ignored in the literature. The on...
Mode stability on the real axis
Andersson, Lars; Paganini, Claudio; Whiting, Bernard F
2016-01-01
A generalization of the mode stability result of Whiting (1989) for the Teukolsky equation is proved for the case of real frequencies. The main result of the paper states that a separated solution of the Teukolsky equation governing massless test fields on the Kerr spacetime, which is purely outgoing at infinity, and purely ingoing at the horizon, must vanish. This has the consequence, that for real frequencies, there are linearly independent fundamental solutions of the radial Teukolsky equation which are purely ingoing at the horizon, and purely outgoing at infinity, respectively. This fact yields a representation formula for solutions of the inhomogenous Teukolsky equation.
Real Estate Investment in Sabah, East Malaysia
Chok, Vui Shung
2008-01-01
Executive Summary Investing in real estate is one of the best means of maximizing ones wealth. An individual can use a property as leverage and hedge it against inflation. Most people invest in this asset class as it is a norm for a property to appreciate at the rate of 5-6% annually, and some even more in places where housing in short supply. This dissertation will evaluate specifically on real estate investment in the state of Sabah, East Malaysia. The chapters begin by providi...
Fernando Salvetti
2014-10-01
Full Text Available e-REAL - enhanced reality lab - is a fully-immersive and multitasking environment, designed to experience challenging situations in a group setting, engaging all participants simultaneously on different levels: with peers, thematic experts and learning facilitators, both on site and remotely. e-REAL is a lab based on visual thinking and knowledge visualization, facilitated by enhanced (or augmented reality tools. It is a highly interactive and face-to-face lab that promotes proactive data and information research (everything is available, but learners have to actively look for it - allowing knowledge sharing with remote teams and integrating training on soft skills with those that are technical and specialized.
Nilpotent orbits in real symmetric pairs
Dietrich, Heiko; Ruggeri, Daniele; Trigiante, Mario
2016-01-01
In the classification of stationary solutions in extended supergravities with symmetric scalar manifolds, the nilpotent orbits of a real symmetric pair play an important role. In this paper we discuss two approaches to determining the nilpotent orbits of a real symmetric pair. We apply our methods to an explicit example, and thereby classify the nilpotent orbits of SL_2(R)^4 acting on the fourth tensor power of the natural 2-dimensional SL_2(R)-module. This makes it possible to classify all stationary solutions of the so-called STU-supergravity model.
SignalR real time application development
Ingebrigtsen, Einar
2013-01-01
This step-by-step guide gives you practical advice, tips, and tricks that will have you writing real-time apps quickly and easily.If you are a .NET developer who wants to be at the cutting edge of development, then this book is for you. Real-time application development is made simple in this guide, so as long as you have basic knowledge of .NET, a copy of Visual Studio, and NuGet installed, you are ready to go.
Scheiderer, Claus
1994-01-01
This book makes a systematic study of the relations between the étale cohomology of a scheme and the orderings of its residue fields. A major result is that in high degrees, étale cohomology is cohomology of the real spectrum. It also contains new contributions in group cohomology and in topos theory. It is of interest to graduate students and researchers who work in algebraic geometry (not only real) and have some familiarity with the basics of étale cohomology and Grothendieck sites. Independently, it is of interest to people working in the cohomology theory of groups or in topos theory.
Recent Advances in Real Options Signaling Games
George Rigopoulos
2014-12-01
Full Text Available Financial economics have benefited from game theory advances and its application to various domains where competition is present. Following relevant research this paper presents a literature review of recent works on the intersection of real options and game theory, especially on signaling games. A preliminary background is presented initially and next a review of the works is presented. The paper compiles existing works to a useful reference for researchers in the field. Keywords: Signaling games; Capital budgeting, Real options, Game theory, Discrete time games
Real economic activity and accounting information in Spanish construction and real estate firms
Juan Carlos Navarro-García
2016-01-01
Full Text Available The aim of this work is to determine whether the accounting information provided by construction and real estate firms in Spain reflects the real economic activity, during upswings and downturns. A relationship is found between economic conditions and financial reporting in a continental European country such as Spain. Although there is a relationship between real housing price growth and financial accounting measures, real estate companies seem to show an artificial position, since they only present a relationship with Return on Assets (ROA based on low quality income (accruals. Therefore, a different financial position influences a different behaviour in these two similar sectors. In fact, some signs alerting of possible risk in real estate firms are shown.
A model of real estate and psychological factors in decision-making to buy real estate
Bojan Grum
2015-06-01
Full Text Available This article explores the psychological characteristics of potential real estate buyers connected with their decision to buy. Through a review of research, it reveals that most studies of psychological factors in the decision to buy real estate have a partial and dispersed orientation, and examine individual factors independently. It appears that the research area is lacking clearly defined models of psychological factors in the decision to buy real estate that would integrally and relationally explain the role of psychological characteristics of real estate buyers and their expectations in relation to a decision to buy. The article identifies two sets of psychological factors, motivational and emotional, determines their interaction with potential buyers’ expectations when deciding to purchase real estate and offers starting points for forming a model.
Get Real: Augmented Reality for the Classroom
Mitchell, Rebecca; DeBay, Dennis
2012-01-01
Kids love augmented reality (AR) simulations because they are like real-life video games. AR simulations allow students to learn content while collaborating face to face and interacting with a multimedia-enhanced version of the world around them. Although the technology may seem advanced, AR software makes it easy to develop content-based…
Students Dig for Real School Gardens
Reeves, Lacey; Emeagwali, N. Susan
2010-01-01
There's a lot of talk about saving the environment and going green these days. But the challenge is to turn the words into action, and that includes getting young students to become part of the discussion about sustainability. The Texas-based Rainwater Environmental Alliance for Learning (REAL) School Gardens is cultivating success by providing…
Oversampling of wavelet frames for real dilations
Bownik, Marcin; Lemvig, Jakob
2012-01-01
We generalize the Second Oversampling Theorem for wavelet frames and dual wavelet frames from the setting of integer dilations to real dilations. We also study the relationship between dilation matrix oversampling of semi-orthogonal Parseval wavelet frames and the additional shift invariance gain...
Analysis of the real EADGENE data set:
Jaffrézic, Florence; de Koning, Dirk-Jan; Boettcher, Paul J; Bonnet, Agnès; Buitenhuis, Bart; Closset, Rodrigue; Déjean, Sébastien; Delmas, Céline; Detilleux, Johannes C; Dove, Peter; Duval, Mylène; Foulley, Jean-Louis; Hedegaard, Jakob; Hornshøj, Henrik; Hulsegge, Ina B; Janss, Luc; Jensen, Kirsty; Jiang, Li; Lavric, Miha; Lê Cao, Kim-Anh; Lund, Mogens Sandø; Malinverni, Roberto; Marot, Guillemette; Nie, Haisheng; Petzl, Wolfram; Pool, Marco H; Robert-Granié, Chrisstèle; San Christobal, Magali; van Schothorst, Evert M; Schuberth, Hans-Joachim; Stella, Alessandra; Tosser-Klopp, Gwwenola; Waddington, Dave; Watson, Michael; Yang, Wei; Zerbe, Holme; Seyfert, Hans-Martin
methods for the detection of differentially expressed genes in order to provide some more general data analysis guidelines. All the workshop participants were given a real data set obtained in an EADGENE funded microarray study looking at the gene expression changes following artificial infection with two...
Wormhole geometry from real feasible matter sources
Rahaman, F.; Kalam, M.; Rahman, K. A.
2008-01-01
We provide a prescription of real feasible sources that supply fuel to construct a traversable wormhole. A class of exact solutions for Einstein-Maxwell field equations describing wormhole with an anisotropic matter distribution has been presented. The anisotropy plays a crucial role for the existence of the spacetime comprising wormhole geometry.
Refactoring Real-Time Java Profiles
Søndergaard, Hans; Thomsen, Bent; Ravn, Anders Peter;
2011-01-01
Just like other software, Java profiles benefits from refactoring when they have been used and have evolved for some time. This paper presents a refactoring of the Real-Time Specification for Java (RTSJ) and the Safety Critical Java (SCJ) profile (JSR-302). It highlights core concepts and makes it...... profiles easier to comprehend and use for application developers and students....
[Real-time ultrasonography in neonatal diagnosis].
Nogués, A; Morales, A; Munguía, C; Pagola, C; Arena, J
1982-11-01
Real time ultrasonography is a diagnostic technique very widely used in pediatrics and with specific applications in neonatology. Bedside its use in Neonatal I.C.U. it has many interesting aspects for intraabdominal and intracranial pathology. In some particular conditions this procedure can be the first diagnostic tool. Conventional X-rays can be performed after sonographic data have been analyzed. PMID:7168508
Real Estate Curriculum for Community Colleges.
Nelson, Robert W.
The Oregon Department of Education has prepared this curriculum guide to assist community college personnel in developing or upgrading real estate programs. This fast-growing field has demanded that community colleges analyze the course content of such programs so that they are relevant to the actual needs of the industry. An Advisory Committee…
Predicting Complexity Perception of Real World Images.
Corchs, Silvia Elena; Ciocca, Gianluigi; Bricolo, Emanuela; Gasparini, Francesca
2016-01-01
The aim of this work is to predict the complexity perception of real world images. We propose a new complexity measure where different image features, based on spatial, frequency and color properties are linearly combined. In order to find the optimal set of weighting coefficients we have applied a Particle Swarm Optimization. The optimal linear combination is the one that best fits the subjective data obtained in an experiment where observers evaluate the complexity of real world scenes on a web-based interface. To test the proposed complexity measure we have performed a second experiment on a different database of real world scenes, where the linear combination previously obtained is correlated with the new subjective data. Our complexity measure outperforms not only each single visual feature but also two visual clutter measures frequently used in the literature to predict image complexity. To analyze the usefulness of our proposal, we have also considered two different sets of stimuli composed of real texture images. Tuning the parameters of our measure for this kind of stimuli, we have obtained a linear combination that still outperforms the single measures. In conclusion our measure, properly tuned, can predict complexity perception of different kind of images. PMID:27336469
Real exchange rates in emerging economies
Brůha, J.; Podpiera, Jiří
2010-01-01
Roč. 18, č. 3 (2010), s. 599-628. ISSN 0967-0750 Institutional research plan: CEZ:AV0Z70850503 Keywords : real exchange rate * emerging economies * two-country modelling Subject RIV: AH - Economics Impact factor: 0.536, year: 2010
Large Devaluations and the Real Exchange Rate
Burstein, Ariel; Eichenbaum, Martin; Rebelo, Sergio
2005-01-01
In this paper we argue that the primary force behind the large drop in real exchange rates that occurs after large devaluations is the slow adjustment in the prices of nontradable goods and services. Our empirical analysis uses data from five large devaluation episodes: Argentina (2002), Brazil (1999), Korea (1997), Mexico (1994), and Thailand…
Refactoring Real-Time Java Profiles
Søndergaard, Hans; Thomsen, Bent; Ravn, Anders P.;
2011-01-01
Just like other software, Java profiles benefits from refactoring when they have been used and have evolved for some time. This paper presents a refactoring of the Real-Time Specification for Java (RTSJ) and the Safety Critical Java (SCJ) profile (JSR-302). It highlights core concepts and makes...
Research into real-option evaluation method
As an evaluational method for valuation of a corporation, an investment project, a research and development, or the evaluation technique of an enterprise strategy, a real option analysis attracts attention instead of conventional Discount Cash Flow method. The reason is that it can divert the technique for the option valuation in financial engineering to the decision-making process performed according to change in investment environment. Related references, the analysis tools, the application examples, etc. were investigated about the decision-making technique using real option analysis, and this investigation considered the application method to decision-making of the research and development at Japan Nuclear Cycle Development Institute. Consequently, since the feature is in real option analysis being the evaluation technique on condition of that business conditions and business itself also change, the real option analysis fits for evaluation of a research and development that business conditions were opaque and it turns out that the businesses are highly flexible. Moreover, it turns out that it fits also for evaluation of a capital concentration type investment issue like power plants. (author)
Riemann surfaces and totally real tori
Duval, Julien; Gayet, Damien
2009-01-01
Given a generic totally real torus unknotted in the unit sphere of the complex plane, we prove the following alternative : either there exists a filling of the torus by holomorphic discs and the torus is rationally convex, or its rational hull contains a holomorphic annulus.
Managing Multiple Goals in Real Learning Contexts
Mansfield, Caroline F.
2009-01-01
Understanding students' multiple goals in real learning contexts is an emerging area of importance for educators and researchers investigating student motivation in classrooms. This qualitative study conducted over an academic year investigates the multiple goals articulated by seven 11-year-old students and explores relationships between goals…
Informal Evaluation Strategies for Real Problem Solving
Ellis, Arthur K.; Alleman-Brooks, Janet
1978-01-01
Examples of possible methods for unobtrusively evaluating student progress through real problem solving outcomes without formal testing are illustrated. These methods include the use of interviews, artifacts, observations, I learned statements, checklists, flow of discussion charts, and self-awareness exercises. (MN)
Chakraborty, Samarjit
2012-01-01
This volume contains the lectures given in honor to Georg Farber as tribute to his contributions in the area of real-time and embedded systems. The chapters of many leading scientists cover a wide range of aspects, like robot or automotive vision systems or medical aspects.
Why Real Estate Makes Sense for Endowments.
Kiser, Arthur G., Jr.
1985-01-01
Attributes of real estate that make it a desirable investment for institutional endowment funds include the uniqueness of each property, its function as a hedge against inflation, its function in stabilizing portfolio volatility, and the potential for income and diversification. (MSE)
Testing Real-Time Systems Using UPPAAL
Hessel, Anders; Larsen, Kim Guldstrand; Mikucionis, Marius; Nielsen, Brian; Pettersson, Paul; Skou, Arne
This chapter presents principles and techniques for model-based black-box conformance testing of real-time systems using the Uppaal model-checking tool-suite. The basis for testing is given as a network of concurrent timed automata specified by the test engineer. Relativized input...... objectives, derive test sequences, apply these to the system under test, and assign a verdict....
The Real-Time Multitask Threading Control
Han, Shuang
2007-01-01
In this master thesis, we design and implemented a super mode for multiple streaming signal processing applications, and got the timing budget based on Senior DSP processor. This work presented great opportunity to study the real-time system and firmware design knowledge on embedded system.
Non-Anomalous Semigroups and Real Numbers
Binder, Damon
2016-01-01
Motivated by intuitive properties of physical quantities, the notion of a non-anomalous semigroup is formulated. These are totally ordered semigroups where there are no `infinitesimally close' elements. The real numbers are then defined as the terminal object in a closely related category. From this definition a field structure on $\\mathbb R$ is derived, relating multiplication to morphisms between non-anomalous semigroups.
On some generalizations of real numbers representations
Serbenyuk, Symon
2016-01-01
The article is devoted to introduce and investigation of new numeral systems. These representations are generalizations of classical representations of real numbers. The main properties of investigating representations are described. The results are represented in International Conference of Yung Mathematicians, June 3-6, 2015, Kyiv.
Ray Tracing for Real-time Games
Bikker, J.
2012-01-01
This thesis describes efficient rendering algorithms based on ray tracing, and the application of these algorithms to real-time games. Compared to rasterizationbased approaches, rendering based on ray tracing allows elegant and correct simulation of important global effects, such as shadows, reflect
Using Story Jokes for Real Communication
DeFelice, William
2012-01-01
Teaching in a monolingual/monocultural, non-English speaking environment can at times be frustrating. Teachers want their students to genuinely communicate with each other in socially acceptable ways, and at the same time become more aware of cultural traits. What is needed in a classroom is a reaction that is real because it is spontaneous. This…
Real-Time Blackboards For Sensor Fusions
Johnson, Donald H.; Shaw, Scott W.; Reynolds, Steven; Himayat, Nageen
1989-09-01
Multi-sensor fusion, at the most basic level, can be cast into a concise, elegant model. Reality demands, however, that this model be modified and augmented. These modifications often result in software systems that are confusing in function and difficult to debug. This problem can be ameliorated by adopting an object-oriented, data-flow programming style. For real-time applications, this approach simplifies data communications and storage management. The concept of object-oriented, data-flow programming is conveniently embodied in the black-board style of software architecture. Blackboard systems allow diverse programs access to a central data base. When the blackboard is described as an object, it can be distributed over multiple processors for real-time applications. Choosing the appropriate parallel architecture is the subject of ongoing research. A prototype blackboard has been constructed to fuse optical image regions and Doppler radar events. The system maintains tracks of simulated targets in real time. The results of this simulation have been used to direct further research on real-time blackboard systems.
Reeves, Thomas C.; Hedberg, John G.
2014-01-01
Rising costs, perceived declining value, and weak evidence of quality outcomes bedevil contemporary higher education. One innovation intended to address these problems is the Massive Open Online Course (MOOC). This article recommends that the educational technology community and others get REAL about MOOCs by focusing more serious effort on…
Solar neutrinos: Real-time experiments
Totsuka, Yoji
1993-04-01
This report outlines the principle of real-time solar neutrino detection experiments by detecting electrons with suitable target material, via Charged-Current (CC) reaction using conventional counting techniques developed in high-energy physics. Only B-8 neutrinos can be detected by minimum detectable energy of several MeV. The MSW (Mikheyev, Smirnov, Wolfenstein) effect not only distorts the energy spectrum but also induces new type of neutrinos, i.e. mu-neutrinos or tau-neutrinos. These neutrinos do not participate in the CC reaction. Therefore real-time experiment is to be sensitive to Neutral Current (NC) reactions. It is a challenge to eliminate environment background as much as possible and to lower the minimum detectable energy to several 100 keV, which will enable observation of Be-7 neutrinos. Target particles of real-time experiments currently running and under construction or planning are electron, deuteron, or argon. The relevant reactions corresponding to CC reaction and some relevant comments on the following targets are described: (1) electron target; (2) deuteron target; and (3) argon target. On-going experiment and future experiments for real-time neutron detection are also outlined.
Real Time Grid Reliability Management 2005
Eto, Joe; Eto, Joe; Lesieutre, Bernard; Lewis, Nancy Jo; Parashar, Manu
2008-07-07
The increased need to manage California?s electricity grid in real time is a result of the ongoing transition from a system operated by vertically-integrated utilities serving native loads to one operated by an independent system operator supporting competitive energy markets. During this transition period, the traditional approach to reliability management -- construction of new transmission lines -- has not been pursued due to unresolved issues related to the financing and recovery of transmission project costs. In the absence of investments in new transmission infrastructure, the best strategy for managing reliability is to equip system operators with better real-time information about actual operating margins so that they can better understand and manage the risk of operating closer to the edge. A companion strategy is to address known deficiencies in offline modeling tools that are needed to ground the use of improved real-time tools. This project: (1) developed and conducted first-ever demonstrations of two prototype real-time software tools for voltage security assessment and phasor monitoring; and (2) prepared a scoping study on improving load and generator response models. Additional funding through two separate subsequent work authorizations has already been provided to build upon the work initiated in this project.
Compiling models into real-time systems
This paper presents an architecture for building real-time systems from models, and model-compiling techniques. This has been applied for building a real-time model-base monitoring system for nuclear plants, called KSE, which is currently being used in two plants in France. We describe how we used various artificial intelligence techniques for building it: a model-based approach, a logical model of its operation, a declarative implementation of these models, and original knowledge-compiling techniques for automatically generating the real-time expert system from those models. Some of those techniques have just been borrowed from the literature, but we had to modify or invent other techniques which simply did not exist. We also discuss two important problems, which are often underestimated in the artificial intelligence literature: size, and errors. Our architecture, which could be used in other applications, combines the advantages of the model-based approach with the efficiency requirements of real-time applications, while in general model-based approaches present serious drawbacks on this point
Compiling models into real-time systems
This paper presents an architecture for building real-time systems from models, and model-compiling techniques. This has been applied for building a real-time model-based monitoring system for nuclear plants, called KSE, which is currently being used in two plants in France. We describe how we used various artificial intelligence techniques for building it: a model-based approach, a logical model of its operation, a declarative implementation of these models, and original knowledge-compiling techniques for automatically generating the real-time expert system from those models. Some of those techniques have just been borrowed from the literature, but we had to modify or invent other techniques which simply did not exist. We also discuss two important problems, which are often underestimated in the artificial intelligence literature: size, and errors. Our architecture, which could be used in other applications, combines the advantages of the model-based approach with the efficiency requirements of real-time applications, while in general model-based approaches present serious drawbacks on this point
BIVARIATE REAL-VALUED ORTHOGONAL PERIODIC WAVELETS
Qiang Li; Xuezhang Liang
2005-01-01
In this paper, we construct a kind of bivariate real-valued orthogonal periodic wavelets. The corresponding decomposition and reconstruction algorithms involve only 8 terms respectively which are very simple in practical computation. Moreover, the relation between periodic wavelets and Fourier series is also discussed.
Feedback as Real-Time Constructions
Keiding, Tina Bering; Qvortrup, Ane
2014-01-01
This article offers a re-description of feedback and the significance of time in feedback constructions based on systems theory. It describes feedback as internal, real-time constructions in a learning system. From this perspective, feedback is neither immediate nor delayed, but occurs in the very moment it takes place. This article argues for a…
Real Compton scattering for ELFE at DESY
Real Compton scattering at large s and t is a hard and exclusive reaction which allows to determine the valence quark wave function. An experiment could be carried out at DESY with a Laser backscattering photon beam produced in the internal ring and with a reasonably large acceptance detector for both photons and protons. (authors)
REAL ROOT ISOLATION OF SPLINE FUNCTIONS
Renhong Wang; Jinming Wu
2008-01-01
In this paper,we propose an algorithm for isolating real roots of a given univariate spline function,which is based on the use of Descartes' rule of signs and de Casteljau algorithm.Numerical examples illustrate the flexibility and effectiveness of the algorithm.
The Real World Significance of Performance Prediction
Pardos, Zachary A.; Wang, Qing Yang; Trivedi, Shubhendu
2012-01-01
In recent years, the educational data mining and user modeling communities have been aggressively introducing models for predicting student performance on external measures such as standardized tests as well as within-tutor performance. While these models have brought statistically reliable improvement to performance prediction, the real world…
REAL ESTATE PUBLICITY AND ACQUISITIVE PRESCRIPTION
Rodica PEPTAN
2011-04-01
Full Text Available Acquisitive prescription as a wayof acquiring the main rigts in rem, that are usuallyreal estate rights, arises the question of its relation tothe public real estate system regarding variousaspects, related to the type of regulation of the twolaw institutions at a given moment.
Real and Artificial Differential Item Functioning
Andrich, David; Hagquist, Curt
2012-01-01
The literature in modern test theory on procedures for identifying items with differential item functioning (DIF) among two groups of persons includes the Mantel-Haenszel (MH) procedure. Generally, it is not recognized explicitly that if there is real DIF in some items which favor one group, then as an artifact of this procedure, artificial DIF…
Real weights, bound states and duality orbits
Marrani, Alessio; Riccioni, Fabio; Romano, Luca
2016-01-01
We show that the duality orbits of extremal black holes in supergravity theories with symmetric scalar manifolds can be derived by studying the stabilizing subalgebras of suitable representatives, realized as bound states of specific weight vectors of the corresponding representation of the duality symmetry group. The weight vectors always correspond to weights that are real, where the reality properties are derived from the Tits-Satake diagram that identifies the real form of the Lie algebra of the duality symmetry group. Both 𝒩 = 2 magic Maxwell-Einstein supergravities and the semisimple infinite sequences of 𝒩 = 2 and 𝒩 = 4 theories in D = 4 and 5 are considered, and various results, obtained over the years in the literature using different methods, are retrieved. In particular, we show that the stratification of the orbits of these theories occurs because of very specific properties of the representations: in the case of the theory based on the real numbers, whose symmetry group is maximally noncompact and therefore all the weights are real, the stratification is due to the presence of weights of different lengths, while in the other cases it is due to the presence of complex weights.
Real Estate Derivatives: New Perspectives in France
J. Friggit
2000-01-01
The development of real estate derivative markets requires (a) an appropriate underlying asset, (b) a demand and (c) a launch market. In France, these requirements are now fulfilled by (a) the Notaires- INSEE home price indices, (b) significant housing price volatility, households' hedge demand and portfolio managers' diversification demand and (c) several potential launch markets.
Endangered Species: Real Life in Two Dimensions
Henderson, Lynette K.
2012-01-01
The focus of "Endangered Species: Real Life in Two Dimensions" is to create awareness about a critical environmental issue. There is a special urgency to this project because large numbers of animal species are currently endangered or on the brink of extinction. In addition to being enlightened about this important topic through research, students…
RTMOD: Real-Time MODel evaluation
Graziani, G.; Galmarini, S.; Mikkelsen, Torben
2000-01-01
The 1998 - 1999 RTMOD project is a system based on an automated statistical evaluation for the inter-comparison of real-time forecasts produced by long-range atmospheric dispersion models for national nuclear emergency predictions of cross-boundaryconsequences. The background of RTMOD was the 1994...... probably contaminated areas....
Valasek, Mark A.; Repa, Joyce J.
2005-01-01
In recent years, real-time polymerase chain reaction (PCR) has emerged as a robust and widely used methodology for biological investigation because it can detect and quantify very small amounts of specific nucleic acid sequences. As a research tool, a major application of this technology is the rapid and accurate assessment of changes in gene…
Project Management in Real Time: A Service-Learning Project
Larson, Erik; Drexler, John A., Jr.
2010-01-01
This article describes a service-learning assignment for a project management course. It is designed to facilitate hands-on student learning of both the technical and the interpersonal aspects of project management, and it involves student engagement with real customers and real stakeholders in the creation of real events with real outcomes. As…
33 CFR 211.2 - Authority to acquire real estate.
2010-07-01
... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Authority to acquire real estate..., DEPARTMENT OF DEFENSE REAL ESTATE ACTIVITIES OF THE CORPS OF ENGINEERS IN CONNECTION WITH CIVIL WORKS PROJECTS Real Estate; General § 211.2 Authority to acquire real estate. (a) Congressional...
12 CFR 34.62 - Real estate lending standards.
2010-01-01
... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Real estate lending standards. 34.62 Section 34.62 Banks and Banking COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY REAL ESTATE LENDING AND APPRAISALS Real Estate Lending Standards § 34.62 Real estate lending standards. (a) Each national bank...
12 CFR 541.16 - Improved residential real estate.
2010-01-01
... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Improved residential real estate. 541.16... REGULATIONS AFFECTING FEDERAL SAVINGS ASSOCIATIONS § 541.16 Improved residential real estate. The term improved residential real estate means residential real estate containing offsite or other...
32 CFR 644.30 - Preliminary real estate work.
2010-07-01
... 32 National Defense 4 2010-07-01 2010-07-01 true Preliminary real estate work. 644.30 Section 644... PROPERTY REAL ESTATE HANDBOOK Project Planning Military (army and Air Force) and Other Federal Agencies § 644.30 Preliminary real estate work. (a) Preliminary real estate work is defined as that action...
33 CFR 211.22 - Real estate Claims Officers.
2010-07-01
... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Real estate Claims Officers. 211..., DEPARTMENT OF DEFENSE REAL ESTATE ACTIVITIES OF THE CORPS OF ENGINEERS IN CONNECTION WITH CIVIL WORKS PROJECTS Real Estate Claims § 211.22 Real estate Claims Officers. In each Division Office the...
12 CFR 541.15 - Improved nonresidential real estate.
2010-01-01
... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Improved nonresidential real estate. 541.15... REGULATIONS AFFECTING FEDERAL SAVINGS ASSOCIATIONS § 541.15 Improved nonresidential real estate. The term improved nonresidential real estate means nonresidential real estate: (a) Containing a permanent...
12 CFR 34.83 - Disposition of real estate.
2010-01-01
... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Disposition of real estate. 34.83 Section 34.83 Banks and Banking COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY REAL ESTATE LENDING AND APPRAISALS Other Real Estate Owned § 34.83 Disposition of real estate. (a) Disposition. A national bank...
12 CFR 541.23 - Residential real estate.
2010-01-01
... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Residential real estate. 541.23 Section 541.23... AFFECTING FEDERAL SAVINGS ASSOCIATIONS § 541.23 Residential real estate. The terms residential real estate... home used in part for business); (c) Other real estate used for primarily residential purposes...
12 CFR 541.27 - Unimproved real estate.
2010-01-01
... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Unimproved real estate. 541.27 Section 541.27... AFFECTING FEDERAL SAVINGS ASSOCIATIONS § 541.27 Unimproved real estate. The term unimproved real estate means real estate that will be improved, as defined in § 541.15 or § 541.16 of this part....
7 CFR 1955.130 - Real estate brokers.
2010-01-01
... 7 Agriculture 14 2010-01-01 2009-01-01 true Real estate brokers. 1955.130 Section 1955.130... Dispose of Inventory Property § 1955.130 Real estate brokers. Contracting authority for the use of real... provide for any licensed real estate broker to provide sales services for any property listed under...
7 CFR 764.104 - General real estate security requirements.
2010-01-01
... 7 Agriculture 7 2010-01-01 2010-01-01 false General real estate security requirements. 764.104....104 General real estate security requirements. (a) Agency lien position requirements. If real estate... Agency; and (4) Equity in the collateral exists. (b) Real estate held under a purchase contract. If...
Providing Real Research Opoportunities to Undergraduates
Ragozzine, Darin
2016-01-01
The current approach to undergraduate education focuses on teaching classes which provide the foundational knowledge for more applied experiences such as scientific research. Like most programs, Florida Institute of Technology (Florida Tech or FIT) strongly encourages undergraduate research, but is dominated by content-focused courses (e.g., "Physical Mechanics"). Research-like experiences are generally offered through "lab" classes, but these are almost always reproductions of past experiments: contrived, formulaic, and lacking the "heart" of real (i.e., potentially publishable) scientific research. Real research opportunities 1) provide students with realistic insight into the actual scientific process; 2) excite students far more than end-of-chapter problems; 3) provide context for the importance of learning math, physics, and astrophysics concepts; and 4) allow unique research progress for well-chosen problems. I have provided real research opportunities as an "Exoplanet Lab" component of my Introduction to Space Science (SPS1020) class at Florida Tech, generally taken by first-year majors in our Physics, Astronomy & Astrophysics, Planetary Science, and Astrobiology degree programs. These labs are a hybrid between citizen science (e.g., PlanetHunters) and simultaneously mentoring ~60 undergraduates in similar small research projects. These projects focus on problems that can be understood in the context of the course, but which benefit from "crowdsourcing". Examples include: dividing up the known planetary systems and developing a classification scheme and organizing them into populations (Fall 2013); searching through folded light curves to discover new exoplanets missed by previous pipelines (Fall 2014); and fitting n-body models to all exoplanets with known Transit Timing Variations to estimate planet masses (Fall 2015). The students love the fact that they are doing real potentially publishable research: not many undergraduates can claim to have discovered
Carsten Lausberg
2013-08-01
Full Text Available Real estate appraisal is usually regarded as both a science and an art: “science” because the appraiser uses mathematical calculations and other objective elements, “art” because he also uses his experience and other subjective elements. This dual character requires—among others—that new insights from other disciplines and current trends are taken into account. The central proposition of the article is that this requirement is not met. The author provides evidence that real estate risk management has made tremendous progress since the mid-1990s which has not found its way into appraisal practice, thereby creating a situation where appraisals by risk analysts differ greatly from appraisals by real estate appraisers. According to the author the gap between real estate appraisal and risk analysis should be closed from both sides. The article begins with an overview of the most important trends which will impact real estate values in the future. From these trends, an exemplary economic scenario for European real estate markets is derived in order to demonstrate that scenario writing is a powerful tool for risk management. After that the author discusses some other methods of risk management and their potential benefits for real estate appraisal.
Argus developer in practice real estate development modeling in the real world
Havard, Tim M
2014-01-01
First ""missing manual"" for Argus Developer--case studies show readers how to analyze a development, something Argus manuals don't do. Argus Developer is by far the leading program for real estate developers worldwide The book is an education in real estate finance as well as the program Author teaches seminars and consults with people using the program--back of room sales likely Author has three other books on real estate development Possibility that Argus gets behind the project The book will contain dozens of screenshots
王龙; 郁文生
2000-01-01
The concept of weak strictly positive real regions is introduced, and its properties are discussed . By using the complete discrimination system for polynomials, complete characterization of the (weak) strictly positive real regions for transfer functions in coefficient space is given. A new effective method for robust strictly positive real synthesis is proposed. This method results in necessary and sufficient conditions for low-order stable interval polynomials and segment polynomials, and is also efficient for high-order cases. Numerical examples are provided to illustrate the effectiveness of this method.
无
2000-01-01
The concept of weak strictly positive real regions is introduced, and its properties are discussed. By using the complete discrimination system for polynomials, complete characterization of the (weak) strictly positive real regions for transfer functions in coefficient space is given. A new effective method for robust strictly positive real synthesis is proposed. This method results in necessary and sufficient conditions for low-order stable interval polynomials and segment polynomials, and is also efficient for high-order cases. Numerical examples are provided to illustrate the effectiveness of this method.
The touch of the real. Il New Historicism e il potere del reale psichiatrico in Foucault
Varricchio, Francesco
2014-01-01
[The touch of the real. The New Historicism and the power of the psychiatric real in Foucault] What is the meaning of “touch of the real”? This paper connects the new historicist Greenblatt’s phrase to Foucault’s use of the term real during his lecture course on psychiatric power. According to New Historicism, influenced by the French philosopher’s thought, representation links to reality; but this reality is imbued with power relations. Throughout his course, Foucault repeteadly argues that ...
The fundamental group of the complement of complexified real arrangements
Let V be a finite dimensional vector space over the real or complex numbers. An arrangement in V is a finite collection of affine hyperplanes of V. Given a real arrangement A in a real vector space V. Then its complexification, AC, is a complex arrangement in the complex vector space VC, and will be called a complexified real arrangement. In this paper, we shall prove a presentation for the fundamental group of the complement of a complexified real arrangement. (author). 7 refs
Competition and market structure in local real estate markets
Beck, Jason; Scott, Frank; Yelowitz, Aaron
2010-01-01
The persistence of the standard six percent real estate sales commission across markets and over time calls into question the competitiveness of the residential real estate brokerage industry. While there is anecdotal evidence that some local real estate markets are fairly concentrated, no systematic study of market structures has been conducted. We have collected primary data on the number and market shares of real estate brokers in a variety of small, medium, and large real estate markets a...
Indirect investment in real estate: Listed companies and funds
Suarez, Jose L.; Vassalo, Amparo
2005-01-01
In Europe today, there are two main vehicles for indirect investment in real estate; real estate investment funds, on the one hand, and, on the other, listed real estate companies. With these instruments, not only does the investor take a position in the real estate market, he/she also acquires different risk/return structures which may vary according to the instrument being used. In some European countries, real estate companies have modified their financial structure and tax position by ado...
Analysis of factors affecting the real estate market in Prague
Kubečková, Kristina
2014-01-01
The goal is to map the current real estate market in Prague, analyzing the factors that influence the demand for real estate on the basis of data obtained while working in the Prague real estate agency. This information I want to use to improve our work, to facilitate an understanding of the requirements and needs of clients in the real estate market. The result should be greater competitiveness of our real estate agency who will be able to expand and profit in future.
Current problems of valuation and real estate management by value
Źróbek, Sabina; Kucharska-Stasiak, Ewa; Trojanek, Maria; Adamiczka, Jerzy; Budzyński, Tomasz; Cellmer, Radosław; DĄBROWSKI, Janusz; Jasińska, Elżbieta; Preweda, Edward; Sajnóg, Natalia
2014-01-01
Real estate management consists in making decisions and performing actions to maintain a real estate property in an unimpaired condition according to its designation and at reasonable investment in this real property. These activities cover diverse aspects of real estate acquisition and use and are oriented, among others, towards increasing the capital of real estate owners. Value-based management is both a management philosophy and a practice requiring full coordination of all actions carrie...
Advanced real-time manipulation of video streams
Herling, Jan
2014-01-01
Diminished Reality is a new fascinating technology that removes real-world content from live video streams. This sensational live video manipulation actually removes real objects and generates a coherent video stream in real-time. Viewers cannot detect modified content. Existing approaches are restricted to moving objects and static or almost static cameras and do not allow real-time manipulation of video content. Jan Herling presents a new and innovative approach for real-time object removal with arbitrary camera movements.
ALMA Correlator Real-Time Data Processor
Pisano, J.; Amestica, R.; Perez, J.
2005-10-01
The design of a real-time Linux application utilizing Real-Time Application Interface (RTAI) to process real-time data from the radio astronomy correlator for the Atacama Large Millimeter Array (ALMA) is described. The correlator is a custom-built digital signal processor which computes the cross-correlation function of two digitized signal streams. ALMA will have 64 antennas with 2080 signal streams each with a sample rate of 4 giga-samples per second. The correlator's aggregate data output will be 1 gigabyte per second. The software is defined by hard deadlines with high input and processing data rates, while requiring interfaces to non real-time external computers. The designed computer system - the Correlator Data Processor or CDP, consists of a cluster of 17 SMP computers, 16 of which are compute nodes plus a master controller node all running real-time Linux kernels. Each compute node uses an RTAI kernel module to interface to a 32-bit parallel interface which accepts raw data at 64 megabytes per second in 1 megabyte chunks every 16 milliseconds. These data are transferred to tasks running on multiple CPUs in hard real-time using RTAI's LXRT facility to perform quantization corrections, data windowing, FFTs, and phase corrections for a processing rate of approximately 1 GFLOPS. Highly accurate timing signals are distributed to all seventeen computer nodes in order to synchronize them to other time-dependent devices in the observatory array. RTAI kernel tasks interface to the timing signals providing sub-millisecond timing resolution. The CDP interfaces, via the master node, to other computer systems on an external intra-net for command and control, data storage, and further data (image) processing. The master node accesses these external systems utilizing ALMA Common Software (ACS), a CORBA-based client-server software infrastructure providing logging, monitoring, data delivery, and intra-computer function invocation. The software is being developed in tandem
Skew orthogonal polynomials for the real and quaternion real Ginibre ensembles and generalizations
There are some distinguished ensembles of non-Hermitian random matrices for which the joint probability density function can be written down explicitly, are unchanged by rotations, and furthermore which have the property that the eigenvalues form a Pfaffian point process. For these ensembles, in which the elements of the matrices are either real, or real quaternion, the kernel of the Pfaffian is completely determined by certain skew orthogonal polynomials, which permit an expression in terms of averages over the characteristic polynomial, and the characteristic polynomial multiplied by the trace. We use Schur polynomial theory, knowledge of the value of a Schur polynomial averaged against real, and real quaternion Gaussian matrices, and the Selberg integral to evaluate these averages. (paper)
José Fajardo
2012-12-01
Full Text Available This paper uses the Liu et al. (2007 approach to estimate the optionimplied Risk-Neutral Densities (RND, real-world density (RWD, and relative risk aversion from the Brazilian Real/US Dollar exchange rate distribution. Our empirical application uses a sample of exchange-traded Brazilian Real currency options from 1999 to 2011. Our estimated value of the relative risk aversion is around 2.7, which is in line with other articles for the Brazilian Economy. Our out-of-sample results showed that the RND has some ability to forecast the Brazilian Real exchange rate, but when we incorporate the risk aversion, the out-of-sample performance improves substantially.
The touch of the real. Il New Historicism e il potere del reale psichiatrico in Foucault
VARRICCHIO, Francesco
2014-12-01
Full Text Available [The touch of the real. The New Historicism and the power of the psychiatric real in Foucault] What is the meaning of “touch of the real”? This paper connects the new historicist Greenblatt’s phrase to Foucault’s use of the term real during his lecture course on psychiatric power. According to New Historicism, influenced by the French philosopher’s thought, representation links to reality; but this reality is imbued with power relations. Throughout his course, Foucault repeteadly argues that therapeutic asylum imposes on subjectified bodiesthe reality of power and the power of reality thanks to a disciplinary technology. The constant visibility produces individuals also in other fields of the social and institutional life, in which the Panopticon principle is effective. The real springs from this mechanism and its representation.
Vimpari, Jussi
2014-01-01
The understanding of real options analysis (ROA) has been claimed by academics to be extremely valuable for the real estate industry; yet adoption of the method in practice has been very slow. The aim of this dissertation is to examine opportunities that ROA opens in real estate investment analysis and decision-making as well as to demonstrate the actual real option value in some topical areas of real estate investment. The study utilizes a mixed method research strategy with both quantita...
Real Estate Returns and the Macroeconomy: Some Empirical Evidence from Real Estate Investment Trust
Thomas E. McCue; John L. Kling
1994-01-01
This paper explores the relationship between the macroeconomy and real estate returns. Equity REIT data are used as a proxy for real estate returns; however, the equity REIT returns are regressed against returns from the Standard and Poor's 500 Stock Index, saving the residuals. These residuals, known as extra-market covariance, are used in the analysis since this technique controls for the covariance between equity REIT returns and the overall stock market. Thus, the residuals represent pure...
Alvarez, Luis H. R.; Jukka Lempa; Elias Oikarinen
2009-01-01
We consider how the inter-temporal discreteness of the revenue and cost processes affect the optimal timing of a real estate investment opportunity in comparison with the investment timing strategy obtained by relying on the traditional continuous real option model. We characterize both optimal investment rules explicitly and show that the continuous model may lead to a significantly higher required rate of return than the discrete model. Hence, our results show that the use of continuous tim...
Feldman, D.; Mendelsohn, M.; Coughlin, J.
2012-06-01
It has been proposed that Real Estate Investment Trusts (REITs) have the potential to lower the cost and increase the adoption of photovoltaic systems (PV) by offering a more attractive source of capital. The purpose of this paper is to explain the fundamental physical characteristics of PV and compare them to the characteristics of 'real' property, to help determine whether REITs can own PV systems.
José Fajardo
2012-12-01
Full Text Available This paper uses the Liu et al. (2007 approach to estimate the optionimplied Risk-Neutral Densities (RND, real-world density (RWD, and relative risk aversion from the Brazilian Real/US Dollar exchange rate distribution. Our empirical application uses a sample of exchange-traded Brazilian Real currency options from 1999 to 2011. Our estimated value of the relative risk aversion is around 2.7, which is in line with other articles for the Brazilian Economy. Our out-of-sample results showed that the RND has some ability to forecast the Brazilian Real exchange rate, but when we incorporate the risk aversion, the out-of-sample performance improves substantially.Este artigo usa a abordagem de Liu et al. (2007 para estimar a densidade neutra ao risco, densidade do mundo real e a aversão relativa ao risco da distribuição da taxa de câmbio Dólar/Real. Na estimação foi utilizada uma amostra de opções Dólar/Real negociadas embolsa entre 1999 e 2011. O valor estimado para a aversão relativa ao risco foi de 2,7, em linha com outros artigos que também estimaram este parâmetro para a economia brasileira. A avaliação fora da amostra mostrou que a densidade neutra ao risco possui alguma habilidade para prever a taxa de câmbio Dólar/Real, mas quando o parâmetro de aversão ao risco é incorporado, a performance fora da amostra melhora substancialmente.
Acting to gain information: Real-time reasoning meets real-time perception
Rosenschein, Stan
1994-01-01
Recent advances in intelligent reactive systems suggest new approaches to the problem of deriving task-relevant information from perceptual systems in real time. The author will describe work in progress aimed at coupling intelligent control mechanisms to real-time perception systems, with special emphasis on frame rate visual measurement systems. A model for integrated reasoning and perception will be discussed, and recent progress in applying these ideas to problems of sensor utilization for efficient recognition and tracking will be described.
Real Time Radiation Monitoring Using Nanotechnology
Li, Jing (Inventor); Wilkins, Richard T. (Inventor); Hanratty, James J. (Inventor); Lu, Yijiang (Inventor)
2016-01-01
System and method for monitoring receipt and estimating flux value, in real time, of incident radiation, using two or more nanostructures (NSs) and associated terminals to provide closed electrical paths and to measure one or more electrical property change values .DELTA.EPV, associated with irradiated NSs, during a sequence of irradiation time intervals. Effects of irradiation, without healing and with healing, of the NSs, are separately modeled for first order and second order healing. Change values.DELTA.EPV are related to flux, to cumulative dose received by NSs, and to radiation and healing effectivity parameters and/or.mu., associated with the NS material and to the flux. Flux and/or dose are estimated in real time, based on EPV change values, using measured .DELTA.EPV values. Threshold dose for specified changes of biological origin (usually undesired) can be estimated. Effects of time-dependent radiation flux are analyzed in pre-healing and healing regimes.
Real Time Eye Tracking in Unconstrained Environments
Majid Tajeri
2012-07-01
Full Text Available In this paper, an effective method for human eye tracking and also decreasing the current challenges and problems in its algorithms, possibly as real time and for unconstrained environments has been proposed. In this method, firstly face has been detected and segmented from the remaining parts to make the searching area in tracking stage, narrower and processing speed higher. Then eye area is determined and eye pupils are detected in the specified area. In the proposed method, to support tracking in eye occlusion state, corner detection has been additionally used. Experimental results show the potential of this method for real time eye tracking in unconstrained environments with existence of complex background, head and face rotation, beard, makeup, eye glasses and veil, even while the eyes are closed. The correct recognition rate of the proposed method is about 91.9%.
Real-Time Watercolor for Animation
Thomas Luft; Oliver Deussen
2006-01-01
We present algorithms that allow for real-time rendering of 3D-scenes with a watercolor painting appearance. Our approach provides an appropriate simplification of the visual complexity, imitates characteristic natural effects of watercolor, and provides two essential painting techniques: the wet-on-wet and the wet-on-dry painting. We concentrate on efficient algorithms based on image space processing rather than on an exact simulation. This allows for the real-time rendering of 3D-scenes. During an animation a high frame-to-frame coherence can be achieved due to a stable segmentation scheme. Finally, we seamlessly integrate a smooth illumination into the watercolor renderings using information from the 3D-scene.
Interactions Between Real and Virtual Spacetimes
Javadi, Hossein; Forouzbakhsh, Farshid
2014-01-01
Here arise the problems of modern physics that theories at the quantum scales have been discontinued. Therefore we should pass through the quantum scales and review phenomena at the sub quantum levels. The question is where to enter the sub quantum levels? Answer is; open a new window for massive...... photons. The reason this answer is that although there are theoretical reasons to accept that the photon is a massless particle. The massless particle is an assumption, also a long series of very different experiments lead to the current experimental upper bound on the photon mass greater than zero. In...... this article, we analyzed that c is the edge of visible and invisible particles such as virtual photons and graviton. It leads us passing the real spacetime and enter into the virtual spacetime and describe interactions between real spacetime and virtual spacetime and reach to non-obvious space....
Modeling Leaves Based on Real Image
CAO Yu-kun; LI Yun-feng; ZHU Qing-sheng; LIU Yin-bin
2004-01-01
Plants have complex structures. The shape of a plant component is vital for capturing the characteristics of a species. One of the challenges in computer graphics is to create geometry of objects in an intuitive and direct way while allowing interactive manipulation of the resulting shapes. In this paper,an interactive method for modeling leaves based on real image is proposed using biological data for individual plants. The modeling process begins with a one-dimensional analogue of implicit surfaces,from which a 2D silhouette of a leaf is generated based on image segmentation. The silhouette skeleton is thus obtained. Feature parameters of the leaf are extracted based on biologically experimental data, and the obtained leaf structure is then modified by comparing the synthetic result with the real leaf so as to make the leaf structure more realistic. Finally, the leaf mesh is constructed by sweeps.
Monte Carlo study of real time dynamics
Alexandru, Andrei; Bedaque, Paulo F; Vartak, Sohan; Warrington, Neill C
2016-01-01
Monte Carlo studies involving real time dynamics are severely restricted by the sign problem that emerges from highly oscillatory phase of the path integral. In this letter, we present a new method to compute real time quantities on the lattice using the Schwinger-Keldysh formalism via Monte Carlo simulations. The key idea is to deform the path integration domain to a complex manifold where the phase oscillations are mild and the sign problem is manageable. We use the previously introduced "contraction algorithm" to create a Markov chain on this alternative manifold. We substantiate our approach by analyzing the quantum mechanical anharmonic oscillator. Our results are in agreement with the exact ones obtained by diagonalization of the Hamiltonian. The method we introduce is generic and in principle applicable to quantum field theory albeit very slow. We discuss some possible improvements that should speed up the algorithm.
ENERGY CONSUMPTION AND REAL GDP IN IRAN
Ali Akbar Naji Meidani
2014-01-01
Full Text Available As one of the most important production factors and one of the most urgent final products, energy has a special position in the growth and development of the country. This paper examines the causal relationship between Real GDP and energy consumption in various economic sectors including (household and commercial, industry, transportation and agriculture sectors for Iran during 1967–2010 using the time series technique known as the Toda-Yamamoto method. Moreover, an error correction model is also estimated so that the results of these two methods are compared. We found a strong unidirectional causality from energy consumption in industry sector to real gross domestic product. Energy consumption in industry sector can observably promote the development of economy.
Real estate space-territorial development
Sarchenko Vladimir Ivanovich
2015-01-01
Full Text Available Urbanization is one of the main sustainable tendencies of modern development. The contemporary state of real estate structure is characterized by high level of heterogeneity. In general, the consolidated design document of Moscow urban development, reconstruction and other forms of developing city territories doesn’t take into account the main tendencies of social and economic development, change of scales and structure of city production capacities, priorities of national economy development, or demand particularities, traditional and perspective preferences of citizens of different categories. The article focuses on systematization of basics of real estate space-territorial development strategic analysis. The author analyses the essence of analytical methods, their purpose, levels and analysis projections. The article emphasizes the estimation of economic effectiveness and revelation of urban environment development reserves.
Real time PCR. Application in dengue studies
Jeanette Prada-Arismendy
2011-06-01
Full Text Available PCR (polymerase chain reaction is a routinely used tool in every diagnostic and research laboratory. This technique has been used in detection of mutations and pathogens, forensic investigation, and even is the base tool for human genome sequencing. A modification of PCR technique, real time PCR, allows the quantification of nucleic acids with higher sensibility, specificity and reproducibility. This article is intended to clarify the foundations of real-time PCR, using an application model for virology. In the actual work, it was quantified the viral load of dengue virus serotype 2 produced from infected murine macrophages; the obtained results in this work established that murine strain BALB/c presents a greater susceptibility to dengue virus infection, which establishes BALB/c murine strain as a best model of study for investigation of dengue virus infection physiopathology.
Euro Membership as a Real Option Trigger
Aabo, Tom; Pantzalis, Christos
2007-01-01
Our empirical study of manufacturing firms (NAICS 33) in the 15 countries consisting the EU prior to its 2004 expansion shows that the introduction of the Euro has made firms based in one of the twelve countries that opted to adopt the Euro more inclined than firms based in one of the three non......-adopters (UK, Sweden, and Denmark) to exercise various forms of real options such as to establish alliances / partnerships, to enter new markets / market segments, to switch suppliers, and to generally expand in the Euro-area. The study furthermore shows that small, profitable and financially constrained firms...... are particularly likely to exercise such real options triggered by the introduction of the Euro. The results go beyond the immediate trade effects, which empirical studies have shown to be weak and without trade diversion as to the three non-adopters, and provide important insights about the potential...
Real Time Structured Light and Applications
Wilm, Jakob
3D sensor ubiquitous and have resulted in a vast amount of new applications and methods. However, such low-cost sensors are generally limited in their accuracy and precision, making them unsuitable for e.g. accurate tracking and pose estimation. With recent improvements in projector technology......, increased processing power, and methods presented in this thesis, it is possible to perform structured light scans in real time with 20 depth measurements per second. This offers new opportunities for studying dynamic scenes, quality control, human-computer interaction and more. This thesis discusses...... several aspects of real time structured light systems and presents contributions within calibration, scene coding and motion correction aspects. The problem of reliable and fast calibration of such systems is addressed with a novel calibration scheme utilising radial basis functions [Contribution B...
Elliptic genera and real Jacobi forms
We construct real Jacobi forms with matrix index using path integrals. The path integral expressions represent elliptic genera of two-dimensional N=(2,2) supersymmetric theories. They arise in a family labeled by two integers N and k which determine the central charge of the infrared fixed point through the formula c=3N(1+2N/k). We decompose the real Jacobi form into a mock modular form and a term arising from the continuous spectrum of the conformal field theory. For a given N and k we argue that the Jacobi form represents the elliptic genus of a theory defined on a 2N dimensional linear dilaton background with U(N) isometry, an asymptotic circle of radius √(kα′) and linear dilaton slope N√(2/k). We also present formulas for the elliptic genera of their orbifolds
Analyzer of neutron flux in real time
With base in the study of the real signals of neutron flux of instability events occurred in the Laguna Verde nuclear power plant where the nucleus oscillation phenomena of the reactor are in the 0 to 2.5 Hz range, it has been seen the possibility about the development a surveillance and diagnostic equipment capable to analyze in real time the behavior of nucleus in this frequencies range. An important method for surveillance the stability of the reactor nucleus is the use of the Power spectral density which allows to determine the frequencies and amplitudes contained in the signals. It is used an instrument carried out by LabVIEW graphic programming with a data acquisition card of 16 channels which works at Windows 95/98 environment. (Author)
Hassan M.M. Elmetwaly
2011-01-01
Full Text Available Problem statement: This study discusses the problem of registration and following-up the real estate rental procedures of all kinds, always what we need is integrated information systems to meet our daily needs in the area of our business. Approach: Proposed information systems includes all of these processes necessary to manage and follow up real estate rental procedures of all different sizes and spaced locations. Results: It is taken into account when building real estate information systems that to be easy to use, quick in performance, serve all interests, serve all officials and help in having and supporting decisions. Such real estate information systems can be used in producing numerous daily, monthly and annual reports, which describes and shows the movement and workflow. Conclusion/Recommendations: The proposed real estate system is built by using oracle databases, it has been taken into account when building these systems the need to be linked to the international information network the internet due to what is offered of the unlimited number of electronic services, which facilitate the movement of transferring and exchanging real estate information for all users of these systems.
Real time earthquake forecasting in Italy
Murru, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; Console, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; Falcone, G.; Earth Science Department, Messina University
2008-01-01
We have applied an earthquake clustering epidemic model to real time data at the Italian Earthquake Data Center operated by the Istituto Nazionale di Geofisica e Vulcanologia (INGV) for short-term forecasting of moderate and large earthquakes in Italy. In this epidemic-type model every earthquake is regarded, at the same time, as being triggered by previous events and triggering following earthquakes. The model uses earthquake data only, with no explicit use of tectonic, geologic, or geodetic...
Real Exchange Rate Misalignment in Azerbaijan
Hasanov, Fakhri; Huseynov, Fariz
2009-01-01
By using quarterly data from 2001-2007 and applying various approaches, we estimate real equilibrium exchange rate misalignment for Azerbaijani Manat (AZN) and find that AZN is slightly overvalued. Purchasing power parity approach does not explain the equilibrium exchange rate. However using behavioral and permanent equilibrium exchange rate approaches, we find that the relative productivity, terms of trade, trade openness, net foreign assets, government expenditures and oil prices are the ma...
Strategic Investment: Real Options and Games
Smit, Han; Trigeorgis, Lenos
2004-01-01
textabstractCorporate finance and corporate strategy have long been seen as different sides of the same coin. Though both focus on the same broad problem, investment decision-making, the gap between the two sides--and between theory and practice--remains embarrassingly large. This book synthesizes cutting-edge developments in corporate finance and related fields--in particular, real options and game theory--to help bridge this gap. In clear, straightforward exposition and through numerous exa...
A Note on Real Estate Marketing Research
Emil E. Malizia
1990-01-01
Although the principles of real estate market analysis are more readily accessible due to the publication of several recent volumes, the topic yet to be grounded properly in the broader marketing research field. Building on the appraisal tradition, the professional market analyst strives for an objective assessment of market comparables and trends to arrive at a thoughtful and informed opinion of economic feasibility on behalf of the client developer, investor, lender, or landowner. However, ...