Thomas Armstrong (2012: El poder de la neurodiversidad. Las extraordinarias capacidades que se ocultan tras el autismo, la hiperactividad, la dislexia y otras diferencias cerebrales. Barcelona: Espasa Libros.

Directory of Open Access Journals (Sweden)

Ángela María Lopera Murcia

2017-06-01

Full Text Available Reseña de la obra 'El poder de la neurodiversidad. Las extraordinarias capacidades que se ocultan tras el autismo, la hiperactividad, la dislexia y otras diferencias cerebrales' (2012 de Thomas Armstrong.

Malformaciones Cerebrales Congénitas. Pronóstico Inesperado

Directory of Open Access Journals (Sweden)

Tomás Omar Zamora Bastidas

2013-09-01

Full Text Available La Hemihidranencefalia es una enfermedad congénita cerebral grave y relativamente rara caracterizada por la ausencia unilateral completa o casi total de la corteza cerebral dentro de un cráneo normal con preservación de estructuras como las meninges, ganglios basales, cerebelo, protuberancia, bulbo raquídeo y la hoz cerebral. Los hemisferios cerebrales inicialmente toman la forma normal y luego se plantea que más tarde se da una destrucción cortical por un grave proceso encefaloclástico, en particular por una lesión focal hipóxico-isquémica, lo cual lleva a que el lugar que ocupaba el tejido destruido sea sustituido en gran parte por espacios llenos de líquido cefalorraquídeo que se asemeja a un gran quiste intracraneal. Se presentan dos casos clínicos, el primero con una hemihidranancefalia derecha con un pronóstico desfavorable desde el momento del diagnóstico, no obstante actualmente ha alcanzado un desarrollo cognitivo que rebasa las expectativas para su condición; El segundo caso es un paciente con hidranencefalia global, éste no alcanzó un desarrollo cognitivo aceptable, pero contradijo el pronóstico y tiempo de vida acorde con su grave malformación.

Diseño e implementación de un sistema de control en tiempo real mediante ondas cerebrales

OpenAIRE

Vimos Tixi, Víctor Hugo; Yánez Flores, Christian Marcelo

2016-01-01

Este proyecto desarrolla el procedimiento para adquirir señales cerebrales relacionadas a la intensión de movimiento de los brazos y estado de relajación con ojos cerrados además de los potenciales desarrollados por el movimiento ocular, las señales obtenidas son procesadas y clasificadas respectivamente. El resultado de la clasificación es utilizado como base para la decisión y la ejecución del movimiento básico de un brazo robótico de cinco grados de libertad, se diseña y construye un softw...

Tamaño relativo encefálico e índices cerebrales en Vanellus c. chilensis (Aves: Charadriidae Relative encephalic size and cerebral indices of Vanellus c. chilensis (Aves: Charadriidae

Directory of Open Access Journals (Sweden)

ESTELA PISTONE

2002-09-01

Full Text Available Se analizó la composición cuantitativa encefálica y se estimaron índices cerebrales en Vanellus c. chilensis (tero o queltehue. Se estimó el volumen porcentual e índices cerebrales del encéfalo total y de siete de sus componentes, como así también los núcleos de relevo de las vías trigeminal, visual y acústica. El telencéfalo es el componente de mayor volumen relativo, siendo el neoestriado la estructura telencefálica de tamaño superior. El desarrollo del estriado propiamente dicho, tecto óptico y los núcleos de relevo de las vías visual y trigeminal concuerdan con la dieta carnívora de Vanellus c. chilensis. El tamaño relativo del Wulst y de los núcleos de la vía acústica se asocia a las complicadas tácticas que utiliza esta especie en la defensa del nido. Los índices cerebrales de las estructuras encefálicas analizadas indican que Vanellus c. chilensis es un ave progresivaThe quantitative encephalic composition and cerebral indices of Vanellus c. chilensis (southern lapwing were analyzed. The percentual volumes and cerebral indices for the whole encephalon and for seven components were calculated as well as relevous nuclei of the trigeminal, visual and acoustic pathways. The component of greater relative volume is the telencephalon. The neostriatum is the most developed encephalic structure. Developing of bulbus olfactorius, striatum, tectum opticum and relevous nuclei of visual and trigeminal pathways are according with the carnivorous diet of Vanellus c. chilensis. The relative size of Wulst and relevous nuclei of acoustic pathway appears associated with the complex tactics used by this species in the defense of nest. Cerebral indices of all the analyzed structures suggest that Vanellus c. chilensis is a progresive bird

Factores de riesgo para la recanalización de los aneurismas cerebrales tratados con coils desprendibles

Directory of Open Access Journals (Sweden)

Carlos Mario Jiménez Yepes

2008-11-01

Full Text Available INTRODUCCIÓN: la efectividad de la embolización con coils de los aneurismas cerebrales se apoya en última instancia en su capacidad para lograr la exclusión del flujo sanguíneo del interior del aneurisma, que a su vez es el mecanismo por medio del cual se previene el resangrado. Los buenos resultados a corto y mediano plazo de la terapia endovascular con coils para la oclusión de aneurismas cerebrales no están discusión, siempre y cuando sean medidos en términos de complicaciones y prevención del resangrado, e incluso son mejores que con cirugía abierta, como lo han demostrado estudios tanto retrospectivos como prospectivos El problema aparece cuando se evalúa la persistencia de la oclusión de los aneurismas a largo plazo. A pesar de las ventajas de la terapia endovascular con coils, los aneurismas embolizados con este método en ocasiones se recanalizan y se requieren intervenciones adicionales, hecho que se constituye en la principal desventaja de esta modalidad de tratamiento. Este fenómeno, llamado recanalización, se ha reportado hasta en, aproximadamente, un tercio de los pacientes. Se han reportado frecuencias de recanalización del 28% en el primer año, 20% entre el primer y segundo años y 14% entre el segundo y tercer años, mostrando un patrón de recanalización que declina progresivamente hasta el tercer año, después del cual ya prácticamente no se presenta. Cognard y colaboradores (Radiology 1999,212;384-356 encontraron una frecuencia de recanalización del 14% en los aneurismas totalmente ocluidos y del 30% en los parcialmente ocluidos, con una frecuencia continua de recurrencia del 5% a los 3 meses, 9% a los 18 meses y 8% a los 38 meses luego de la embolización. En la serie reportada por Hayakawa (J Neurosurgery 2000, 193;561- 568 49% de los aneurismas tratados por medio de coils se hicieron recurrentes debido a recanalización de la luz meses o años después del tratamiento inicial. Como se puede ver a partir

Diseño y construcción de un prototipo de electroencefalógrafo para adquisición de señales cerebrales

OpenAIRE

Villalba Calvillo, Guillermo

2016-01-01

El objetivo del presente proyecto es el desarrollo e implementación de un electroencefalógrafo de pequeñas dimensiones que permita la monitorización y registro de señales cerebrales. El sistema estará compuesto por una etapa analógica que se encargará de acondicionar la señal, una etapa digital, compuesta por un microcontrolador (DAQ) cuyo objetivo es digitalizar la señal que recibe de la etapa analógica, y una interfaz gráfica para visualizar dicha señal, donde se podrá procesar y analizar l...

Comunicación con computador mediante señales cerebrales : aplicación a la tecnología de la rehabilitación

OpenAIRE

Martínez Pérez, Jose Luis

2011-01-01

Avances recientes en hardware para ordenadores personales y procesamiento de señal ha hecho posible el uso de señales EEG u ondas cerebrales para comunicación entre personas y computadores. Pacientes que sufren de síndromes bloqueantes disponen ahora de una nueva forma de comunicación con el resto del mundo, pero incluso con las más modernas técnicas, estos sistemas aún tienen tasas de comunicación del orden de 2-3 actividades / minuto. En suma, los dispositivos existentes no son diseñados co...

Comunicación con computador mediante señales cerebrales : aplicación a la tecnología de la rehabilitación

OpenAIRE

Martínez Pérez, Jose Luis

2010-01-01

Avances recientes en hardware para ordenadores personales y procesamiento de señal ha hecho posible el uso de señales EEG u ondas cerebrales para comunicación entre personas y computadores. Pacientes que sufren de síndromes bloqueantes disponen ahora de una nueva forma de comunicación con el resto del mundo, pero incluso con las más modernas técnicas, estos sistemas aún tienen tasas de comunicación del orden de 2-3 actividades / minuto. En suma, los dispositivos existentes no son diseñados co...

Predominancia de los hemisferios cerebrales en los residentes de medicina

Directory of Open Access Journals (Sweden)

Jaime Arias Congrains

1999-01-01

Full Text Available Objetivo: Medir la predominancia de los hemisferios cerebrales (HC en los residentes de medicina y encontrar algunos factores asociados así como la correlación que tendrían con las estrategias inadecuadas empleadas ante el estrés. Materiales y métodos: Aplicamos una prueba para medir la predominancia de los HC al total de los 48 residentes de medicina del Hospital Nacional Cayetano Heredia. Los resultados se contrastaron con variables socio-demográficas, académicas y con las estrategias para afrontar el estrés, halladas estas últimas en una investigación anterior. Los resultados se sometieron al análisis bivariado y multivariado. Resultados y conclusiones: El 35.4% (17 de los residentes mostró una predominancia del hemisferio izquierdo (HI, el cual además obtuvo una calificación promedio mayor que la del hemisferio derecho (HD y que la integración hemisférica (IH. Los 6 residentes con predominancia del HD tuvieron una mayor calificación en el ingreso a la residencia que aquellos con predominancia del HI. En el análisis multivariado; el haber nacido o estudiado medicina en Lima, la mejor calificación en el ingreso al programa de residentado, el mostrar interés por los resultados de la prueba aplicada y el haber estudiado en un colegio estatal, fueron los factores asociados al HD Las habilidades de los HC se correlacionaron con algunas estrategias frente al estrés. Conclusiones: Se concluye la necesidad de perfeccionar la prueba de predominancia de los HC, así como la de implementar pautas de enseñanza de la medicina que propicien la integración hemisférica, en cuanto ella estaría asociado con mejores aptitudes académicas, interpersonales y de adecuación al estrés. (Rev Med Hered 1999; 10:21-26 .

Lesiones cerebrales en áreas limítrofes e infartos hemodinámicos. Evaluación con imágenes diagnósticas

Directory of Open Access Journals (Sweden)

Julio Mario Araque G.

1999-04-01

Full Text Available La clasificación de los infartos cerebrales, desde el punto de vista de las imágenes diagnósticas, se basa fundamentalmente en la localización, tamaño y forma en que se evidencia el daño parenquimatoso en los estudios de Resonancia Magnética (RM o de Tomografía Axial Computadorizada (TAC (1,2. Con los mencionados exámenes se pueden diferenciar infartos territoriales de infartos limítrofes, lo cual tiene implicaciones pronósticas y de tratamiento, pues las lesiones en áreas limítrofes implican un compromiso más severo de la hemodinámica global del paciente (3 y se asocian frecuentemente a lesiones significativas de vasos intra o extracraneanos o enfermedad sistémica.

Deterioro de la percepción visual en el envejecimiento: Mecanismos cerebrales compensadores

Directory of Open Access Journals (Sweden)

José Manuel Rodríguez-Ferrer

2015-08-01

Full Text Available Se han estudiado los efectos del envejecimiento normal en la percepción visual y la existencia de posibles mecanismos cerebrales compensadores. En tres grupos de 30 personas con edad media de 19,6, 42,6 y 65,7 años, se midieron los tiempos de respuesta a la presentación de estímulos (un círculo gris de 0.5 grados de diámetro de forma secuencial en 24 posiciones del campo visual, distribuidas en 8 coordenadas polares y 3 excentricidades (2.15, 3.83 y 5.53 grados de campo visual. El estímulo se presentó durante 100 milisegundos, con bajo y alto contraste (6% y 78%, respectivamente. Los experimentos se realizaron con y sin atención encubierta a los estímulos. Se observó un incremento progresivo de los tiempos de respuesta con la edad para los estímulos del 6% de contrate y de los presentados en la excentricidad de 5.53º. La atención redujo los tiempos de respuesta en los tres grupos de edad, especialmente en jóvenes y mayores. Los resultados muestran que durante el envejecimiento se produce un deterioro selectivo y progresivo en la percepción de estímulos de bajo contraste y que este deterioro es mayor en las zonas periféricas maculares. A partir de los sesenta años se potencia el desarrollo de mecanismos compensadores que implican una mayor eficacia de la atención visual.

La biopsia estereotáctica en el diagnóstico de las lesiones cerebrales focales en sida Stereotactic brain biopsy in the diagnosis of focal brain lesions in AIDS

Directory of Open Access Journals (Sweden)

Marcelo Corti

2008-08-01

Full Text Available Las lesiones cerebrales focales constituyen una complicación frecuente en los pacientes con infección por el virus de la inmunodeficiencia humana (HIV y síndrome de inmunodeficiencia adquirida (sida. Durante el período comprendido entre enero de 1999 y mayo de 2007 se realizaron un total de 83 biopsias en pacientes con sida y lesiones cerebrales. Se incluyeron aquellos pacientes que no hubiesen respondido al algoritmo habitual de enfoque diagnóstico-terapéutico de estas lesiones. Todas las muestras obtenidas fueron sometidas a evaluación intraoperatoria para asegurar la obtención de material patológico y posterior análisis histopatológico y exámenes microbiológicos. De los 41 pacientes con lesiones cerebrales múltiples, 62 tenían localización supratentorial, en 4 eran infratentoriales y 17 mostraron ambas localizaciones. Cincuenta y un lesiones seleccionadas como blanco estereotáctico tuvieron refuerzo periférico del contraste. Se obtuvo material histopatológico en el 100% de los procedimientos. El diagnóstico más frecuente fue el de leucoencefalopatía multifocal progresiva (LEMP con 24 casos (29%, seguido del linfoma primario del sistema nervioso central (LPSNC con 19 diagnósticos (23% y de toxoplasmosis en 13 pacientes (15.7%. Se comprobó una relación significativa entre los diagnósticos histopatológicos y la localización de las lesiones y entre los diagnósticos histopatológicos y el comportamiento de las imágenes luego de la administración de la sustancia de contraste. El rédito diagnóstico alcanzó el 90.3% (75 biopsias. La morbiletalidad en esta serie fue de 2.4%. La biopsia cerebral estereotáctica permitió alcanzar el diagnóstico etiológico y adecuar el enfoque terapéutico en la mayoría de los pacientes de esta serie.Focal brain lesions are frequent complications among HIV/AIDS patients. Between January 1999 and May 2007, 83 procedures of stereotactic brain biopsies in HIV/AIDS patients with focal

Calidad de Vida en Pacientes con Tumores Cerebrales: Importancia de las Variables Psicológicas

Directory of Open Access Journals (Sweden)

Ana Sanz Cortés

2015-01-01

Full Text Available Los síntomas clínicos de ansiedad y depresión, así como el deterioro cognitivo determinan la calida de vida de los pacientes con tumores cerebrales (Liu, Page, Solheim, Fox y Chang, 2009. El objetivo de este estudio es analizar la calidad de vida y su relación con diferentes variables psicológicas en individuos diagnosticados de glioma hace seis meses. La muestra estuvo formada por 28 pacientes (58.6% hombres con una edad media de 54.38 años, el 89.2% de los cuales estaba recibiendo tratamiento oncológico adyuvante. A todos ellos se les aplicó un protocolo de valoración con un instrumento de calidad de vida y una batería neuropsicológica (ansiedad y depresión, orientación, atención, memoria, lenguaje, gnosias y funciones ejecutivas. Los pacientes del estudio presentaron una peor calidad de vida en determinadas dimensiones (física, familiar, funcional y en la percepción global de bienestar. Todas las áreas de la calidad de vida se asocian con variables de estado de ánimo y la presencia de manifestaciones clínicas de depresión explica una deficitaria calidad de vida. Por otra parte, el mejor rendimiento cognitivo de los pacientes con gliomas en procesos de reconocimiento de objetos, memoria y planificación indica una mayor calidad de vida global de dichos pacientes.

Examining Game Design Features for Identity Exploration and Change

Science.gov (United States)

Foster, Aroutis; Shah, Mamta

2016-01-01

This study used the Dynamic Systems Model of Role Identity (DSMRI) to examine the extent to which a game, Land Science, afforded identity change opportunities as exploration of science identities, science content knowledge, science confidence, action possibilities, and interest/valuing in an intentional manner. Analysis of the game and existing…

Scanning Techniques for Brain-Tumour, Localization; Techniques Scintigraphies pour la Iocalisation des Tumeurs Cerebrales; Tekhnika skennirovaniya pri opredelenii lokalizatsii opukholej mozga; Tecnicas Centelleograficas para la Localizacion de Tumores Cerebrales

Energy Technology Data Exchange (ETDEWEB)

Duggan, M. H.; Brice, J.; Jones, E.; Mallard, J. R.; Myers, M. L. [Department Of Medical Physics, Postgraduate Medical School, Hammersmith Hospital, London (United Kingdom)

1964-10-15

etudes dynamiques. Ses inconvenients sont, notamment, la difficulte de noter les caracteristiques anatomiques et les distorsions geometriques qui se produisent. On les compare dans le cas des stenopes et de certaines ouvertures reglables. L'auteur examine les ameliorations de rendement resultant des modifications de circuit pour faire disparaitre la dependance du format de l'image a l'egard de l'energie des rayons gamma. L'analyse des scintigrammes du cerveau presente des difficultes lorsque le taux de comptage pour la zone suspecte est a peine plus eleve que pour les zones avoisinantes. On a etabli un schema 'normal' du taux de comptage pour le crane en divisant les scintigrammes en regions a peu pres equivalentes du point de vue anatomique d'un patient a l'autre, et en comptant les traces scintigraphiques dans chaque region. On peut comparer tout scintigramme anormal a ce schema. Une telle analyse est faite au mieux avec un ordinateur. L'utilisation de methodes d'etablissement continu des valeurs moyennes peut egalement presenter un interet pour l'amelioration de la visualisation des anomalies au voisinage des limites de la detection. Les auteurs etudient la possibilite d'utiliser des selecteurs multiconaux aux fins decrites ci-dessus; cet emploi permet la realisation d'un nouveau dispositif de visualisation efficace tant pour des systemes mobiles que pour des systemes stationaire. (author) [Spanish] La centelleo- grafia policromarse ha empleado para explorar dos series clfnicas de tumores cerebrales, una con {sup 7}'4As, por deteccion de positrones, y la otra mediante albumina marcada con {sup 131}I por deteccion gamma con ayuda de un colimador enfocado. Se indican los resultados obtenidos en ambas series y se explica la utilidad clinica del procedimiento. Estudiando tumores en ratas, Matthews ha demostrado que el citrato de {sup 206}Bi deberla ser una sustancia particularmente adecuada para localizar tumores cerebrales ; por esta razon se ha realizado una primera

Causal learning is collaborative: Examining explanation and exploration in social contexts.

Science.gov (United States)

Legare, Cristine H; Sobel, David M; Callanan, Maureen

2017-10-01

Causal learning in childhood is a dynamic and collaborative process of explanation and exploration within complex physical and social environments. Understanding how children learn causal knowledge requires examining how they update beliefs about the world given novel information and studying the processes by which children learn in collaboration with caregivers, educators, and peers. The objective of this article is to review evidence for how children learn causal knowledge by explaining and exploring in collaboration with others. We review three examples of causal learning in social contexts, which elucidate how interaction with others influences causal learning. First, we consider children's explanation-seeking behaviors in the form of "why" questions. Second, we examine parents' elaboration of meaning about causal relations. Finally, we consider parents' interactive styles with children during free play, which constrains how children explore. We propose that the best way to understand children's causal learning in social context is to combine results from laboratory and natural interactive informal learning environments.

43 CFR 23.5 - Technical examination of prospective surface exploration and mining operations.

Science.gov (United States)

2010-10-01

... mining operations vary widely with respect to topography, climate, surrounding land uses, proximity to... surface exploration and mining operations. 23.5 Section 23.5 Public Lands: Interior Office of the Secretary of the Interior SURFACE EXPLORATION, MINING AND RECLAMATION OF LANDS § 23.5 Technical examination...

Exploration of the attitudes of nursing students to peer physical examination and physical examination of patients.

Science.gov (United States)

Wearn, Andy M; Bhoopatkar, Harsh; Mathew, Thomas K; Stewart, Lisa

2013-08-01

The use of peer physical examination (PPE) in early clinical skills has been studied amongst medical students. The majority of students are comfortable with using peer physical examination, when sensitive areas are excluded. Students' attitudes are related to their personal characteristics: gender, age, religious faith, and ethnicity. There is no data on nursing students' attitudes to peer physical examination. Identify and explore: Dual cohort, cross-sectional, anonymous survey. Three-year undergraduate nursing programme, skills centre and service clinical learning. All first and third year nursing students were asked to complete a modified Examining Fellow Students questionnaire at the end of 2008. The questionnaire asked students to indicate which of 12 body areas they would not be willing to examine/have examined by a peer of the same/opposite gender. This study also asked students which of the 12 body areas they felt uncomfortable examining on patients. The response rate was 76% (128/168). The students were predominantly female (93% female; 7% male). Most students were comfortable with examining non-sensitive body regions of peers (78.2%-100% willing) and patients (92.3-100% willing). Male gender was significantly associated with willingness to examine and be examined by peers (p=0.001); Asian students were significantly less willing to engage in peer physical examination with opposite gender (pexamining patients of either gender (pexamination shows similarities and differences to other studies. Student characteristics were not related to patient examination attitudes. Copyright © 2012 Elsevier Ltd. All rights reserved.

Síndrome disejecutivo en pacientes con lesiones cerebrales no frontales. Evidencias empíricas obtenidas con la aplicación del WCST.

Directory of Open Access Journals (Sweden)

Hansel Soto Hernández

2016-01-01

Full Text Available En la presente investigación el objetivo fue evaluar el impacto que tienen las lesiones tumorales no frontales sobre las funciones ejecutivas. Se analizó el rendimiento en el test de WCST de un grupo experimental de pacientes con tumores cerebrales no frontales (n=30, y se comparó con dos grupos controles. El grupo control (1, conformado por pacientes con lesiones tumorales frontales (n=15, y el grupo control (2, por sujetos normales (n=40. Ambos grupos clínicos pertenecieron al servicio de Neurocirugía del Hospital Hermanos Ameijeiras. Se diagnosticó el síndrome disejecutivo en el 67% de los sujetos con lesiones tumorales no frontales y no se encontraron diferencias significativas entre ambos grupos de pacientes clínicos. Los análisis estadísticos, sugieren que las funciones ejecutivas no son un sistema unitario y modular, sino más bien de procesamiento múltiple. Se recomienda no emplear el WCST en la práctica neuropsicológica como una prueba exclusiva para el diagnóstico de lesión cerebral frontal, sino más bien como un instrumento de evaluación de las funciones ejecutivas.

Exploration of the value of using a formula sheet for physics examinations

International Nuclear Information System (INIS)

Chang, Wheijen; Shieh, Ruey S

2013-01-01

The purpose of this study is to explore whether and how allowing students to prepare their own formula sheet (FS) for use in examinations helps them engage in meaningful learning and improve their academic performance. An action research is adopted to conduct the study. Three years (2009–11) of evaluation of the FS policy in introductory physics courses was undertaken. The data collection consists of the students' FS, examination results, and self-reported surveys. The results show that the students who were allowed to bring an FS to the examination outperformed those who were not. It is also found that the quality of individual students' FS was significantly correlated to their examination score (p < 0.001). The reported benefits of using an FS consists of facilitating conceptual understanding, highlighting cognitive demands in learning physics, and alleviating stress in examinations. The FS strategy appears to have the potential for strengthening students' understanding of physics concepts. (paper)

An exploration of adolescents' perceptions of X-ray examinations

International Nuclear Information System (INIS)

O' Shea, C.; Davis, M.

2015-01-01

Purpose: The research presented in this paper is taken from a larger study whose aims were to explore adolescents' perceptions of X-ray examinations and more specifically middle adolescents' perceptions of X-ray examinations. Middle adolescents are between the ages of 15 and 17 years and experience many changes in their lives that differentiate them from young and late adolescents. There is limited research available on middle adolescents' perceptions of the X-ray examination process Methodology: 18 adolescents, age range 15–17 years, took part in the research study. This included 9 male and 9 female adolescents from 2 secondary schools in the Dublin area. A self-completion questionnaire was used as the method of investigating their perceptions of the X-ray examination process. The data, which consisted of feelings and opinions, was analysed qualitatively using thematic analysis. Results: Analysis suggested that the adolescents perceived that the ‘wait’ in the waiting room was long and boring. They expressed an interest in the provision of suitable recreational facilities to distract them from feeling nervous, bored and from the pain they felt. 16 of the adolescents found the X-ray examination interesting, although they appeared to have little knowledge of what was happening. 14 of the adolescents perceived the radiographer to be friendly. More boys than girls complained about the radiographer. Conclusion: The study indicates that middle adolescents are not receiving effective quality care that meets their specific needs when presenting for an X-ray examination. Further research could help in providing the adolescents with the optimum care they need. - Highlights: • Waiting was long and boring. • X-ray examination was interesting. • Adolescents had little knowledge of what was happening. • Adolescents would like more age appropriate material

Development of radioiodinated ligands for exploration of brain monoamine oxidase by tomo-scintigraphy; Developpement de ligands radioactifs pour l'exploration des monoamines oxydases cerebrales en tomoscintigraphie

Energy Technology Data Exchange (ETDEWEB)

Rafii, H

1996-07-01

Monoamine oxidases, MAO, are important in the regulation of monoaminergic neuro-transmissions. The fluctuations in MAO activities has been observed in some psychiatric and neuro-degenerative diseases. Thus, quantification of cerebral MAO activity would be useful for diagnosis and the therapeutic follow-up of these disorders. With the object of doing an in vivo scintigraphic exploration of cerebral MAO by SPECT, we have undertaken to synthesize some radioiodinated MAO inhibitors. In the first part of this work, we have discussed the general properties of the monoamine oxidases and their inhibitors. In the second part we have described the scintigraphic methods. the ligands to be used for MAO exploration, and the radioiodination methods. At last in the third part, the development of three radioiodinated ligands has been presented: - [{sup 125}I]3-iodopargyline. In vivo results showed that, this radioligand blocked the cerebral MAO-B with moderate selectivity. However, complementary in vivo studies would be needed to define precisely its activity.- [{sup 125}I]Ro 16-6491. The cerebral fixation of this radioligand was in accordance with the MAO-B sites in the rat brains, but its fixation was too low for scintigraphic exploration in vivo with iodine-123. - [{sup 125}I]Ro 11-9900. In vivo studies of rat brains showed that the MAO-A sites were bound preferentially by this radioligand. The cerebral biodistribution of this ligand labelled with iodine-123 is considered for use in a model animal nearest to human pathology. (author)

The accuracy of musculoskeletal ultrasound examination for the exploration of meniscus injuries in athletes.

Science.gov (United States)

Mureşan, Simona; Mureşan, Mircea; Voidăzan, Septimiu; Neagoe, Radu

2017-05-01

Meniscus injuries represent a frequently occurring pathology in athletes and require an optimum diagnosis protocol. This study aimed to evaluate the accuracy of ultrasound examination for the identification of meniscus injuries, in comparison with magnetic resonance imaging (MRI), using the arthroscopy as reference. This prospective longitudinal comparative study included 45 athletes who were clinically examined by MRI and further, by arthroscopy, in a medical center dedicated to sport traumatology. The conventional ultrasound exploration of the knee allowed the identification of a diverse pathology, presenting a sensitivity of 88.8% for the diagnosis of medial meniscus injuries and 70.0% for the lateral meniscus. The specificity was 77.7% for the medial meniscus and 96.0% for the identification of lateral meniscus injuries. Using MRI, a sensitivity of 69.4% was obtained for the medial meniscus and 75.0% for the lateral meniscus, with a specificity of 76.6% for the pathology of medial meniscus and 80.0% for the lateral meniscus. Statistical analysis, based on the comparison of ROC curves, did not show any significant difference between the two applied diagnostic techniques (P=0.061 for the medial meniscus and P=0.534 for the lateral meniscus). The musculoskeletal ultrasound exploration of the knee joint, performed in a medical center with high addressability, by an experienced examiner, was able to identify the medial and lateral meniscus injuries with an accuracy comparable to that of MRI examination.

Brain Tumour Scintigraphy with {sup 99m}Tc-Pertechnetate, {sup 99m}Tc-Fe(II) Complex and {sup 131}I-Labelled Macroaggregated Albumin - Comparison of Results; La Scintigraphie des Tumeurs Cerebrales a l'Aide de Pertechnetate Marque au {sup 99m}Tc, de Complexe {sup 99m}Tc-Fe-II et de Macroagregats d'Albumine Marques au {sup 131}I. Comparaison des Resultats

Energy Technology Data Exchange (ETDEWEB)

Haas, J. P.; Dietz, H.; Schmidt, K. J.; Doerr, F.; Brod, K. H.; Wolf, R. [Institut de Radiologie Clinique et Clinique de Neurochirurgie, Universite de Mayence, Federal Republic of Germany (Germany)

1969-05-15

from a wide selection of case studies. (author) [French] Aujourd'hui le {sup 99m}Tc, sous forme de pertechnetate, a trouve sa place dans la scintigraphie cerebrale.' Selon les experiences des auteurs du memoire ainsi que celles d'autres auteurs, sa valeur diagnostique est egale a celle des substances marquees au mercure ou a l'iode. Tout en utilisant le pertechnetate marque au {sup 99m}Tc les auteurs ont cherche a elargir le diagnostic isotopique par deux methodes; l'injection intra-arterielle de macro-agregats d'albumine, et l'injection, par voie intraveineuse, d'une nouvelle substance, le complexe {sup 99m}Tc-Fe-II. Les auteurs ont publie en 1966 les resultats obtenus a l'aide de la premiere methode; ils presentent maintenant le bilan de leurs experiences sur un grand nombre de patients, plus de cent, souffrant de tumeurs cerebrales. Comparee a la scintigraphie au pertechnetate marque au {sup 99m}Tc apres injection par voie intraveineuse, la nouvelle methode donne des informations complementaires qui facilitent souvent grandement le diagnostic neuroradiologique clinique. La plupart des cas furent verifies par l'operation ou l'autopsie. La methode donne pour la premiere fois la possibilite de visualiser par la scintigraphie le reseau arteriel du cerveau. Les auteurs ont ete amenes a utiliser la deuxieme methode pour la detection des tumeurs cerebrales en raison de la facilite de mise en oeuvre de la scintigraphie cerebrale apres injection par voie intraveineuse, et parce qu'ils disposaient des resultats d'experiences effectuees avec le complexe {sup 99m}Tc-Fe-H sur la scintigraphie des reins ainsi que d'une breve communication parue dans la litterature americaine. Les premieres experiences montrent que cette substance est nettement superieure a toutes celles qui ont ete utilisees jusqu'ici par voie intraveineuse. Elle unit les avantages incontestables du {sup 99m}Tc, en ce qui concerne surtout la dose d'irradiation du patient, a la nettete extraordinaire de

Exploring the Relationship between Experienced Students' Preference for Open- and Closed-Book Examinations, Approaches to Learning and Achievement

Science.gov (United States)

Karagiannopoulou, Evangelia; Milienos, Fotios S.

2013-01-01

The relationship between university students' approaches to learning and preference for the open- and closed-book examinations was investigated for 144 Greek undergraduate (56 third- and 88 fourth-year) students attending a Philosophy, Education and Psychology Department. The approaches were explored by the Approaches and Study Skills Inventory…

Análisis comparativo de meningiomas cerebrales Grado I vs Grado II en una serie retrospectiva de 63 pacientes operados

Science.gov (United States)

Coppola, Federico; Campbell, Juan Iaconis; Herrero, Juan Manuel; Volpe, Emilio; Cersosimo, Tito

2017-01-01

Resumen Introducción: Los meningiomas Grado II tienen un comportamiento biológico más agresivo que los Grado I. A partir del año 2007, con los nuevos criterios de clasificación, la incidencia de meningiomas atípicos reportada aumentó hasta un 35%. Objetivo: Establecer diferencias entre los Meningiomas Grado I y II de la clasificación de la OMS, en lo que respecta a: grados de resección de Simpson, localización tumoral, necesidad de reintervención, tratamiento adyuvante, evolución y mortalidad. Métodos: Estudio retrospectivo de 63 pacientes operados entre el periodo 2009-2015. Variables analizadas: sexo, edad, grado histológico, localización, grado de resección quirúrgica, radioterapia adyuvante, mortalidad y evolución. Resultados: Se analizaron 63 pacientes: 51 Grado I y 12 Grado II de la clasificación de la OMS. La distribución por sexo no mostró diferencias entre meningiomas benignos y atípicos. Tampoco el grupo etario de presentación; mediana de 57 años. Un 55% de los meningiomas benignos se localizaron fuera de la base del cráneo versus el 91,6% de los meningiomas atípicos (P = 0.02). En el 74,5% de los meningiomas benignos se logró una resección total (Simpson I-II-III) versus el 58.3% para los atípicos (P = 0.3). Se reintervinieron el 33,3% de meningiomas atípicos en comparación con el 9.8% de los benignos (P = 0.03). Tuvieron una buena evolución el 86,2% de los benignos vs el 53,8% de los GII (P = 0.01). Realizaron radioterapia adyuvante el 33,3% de los meningiomas Grado II vs el 1,9% de los Grado I. Conclusiones: Los meningiomas atípicos cerebrales tienen peor pronóstico evolutivo que los Grado I de la OMS. Presentan una mayor tasa de reintervención y se localizan más frecuentemente fuera de la base del cráneo. La localización pareciera ser un factor de riesgo para el desarrollo de meningiomas atípicos. PMID:29142779

Exploring Specialized STEM High Schools: Three Dissertation Studies Examining Commonalities and Differences Across Six Case Studies

Science.gov (United States)

Tofel-Grehl, Colby

This dissertation is comprised of three independently conducted analyses of a larger investigation into the practices and features of specialized STEM high schools. While educators and policy makers advocate the development of many new specialized STEM high schools, little is known about the unique features and practices of these schools. The results of these manuscripts add to the literature exploring the promise of specialized STEM schools. Manuscript 1¹ is a qualitative investigation of the common features of STEM schools across multiple school model types. Schools were found to possess common cultural and academic features regardless of model type. Manuscript 2² builds on the findings of manuscript 1. With no meaningful differences found attributable to model type, the researchers used grounded theory to explore the relationships between observed differences among programs as related to the intensity of the STEM experience offered at schools. Schools were found to fall into two categories, high STEM intensity (HSI) and low STEM intensity (LSI), based on five major traits. Manuscript 3³ examines the commonalities and differences in classroom discourse and teachers' questioning techniques in STEM schools. It explicates these discursive practices in order to explore instructional practices across schools. It also examines factors that may influence classroom discourse such as discipline, level of teacher education, and course status as required or elective. Collectively, this research furthers the agenda of better understanding the potential advantages of specialized STEM high schools for preparing a future scientific workforce. ¹Tofel-Grehl, C., Callahan, C., & Gubbins, E. (2012). STEM high school communities: Common and differing features. Manuscript in preparation. ²Tofel-Grehl, C., Callahan, C., & Gubbins, E. (2012). Variations in the intensity of specialized science, technology, engineering, and mathematics (STEM) high schools. Manuscript in preparation

Technetium 99m pyrophosphate bone scintigraphy in the exploration of breast cancer bone metastases (analysis of 311 examinations)

International Nuclear Information System (INIS)

Bonichon, Francoise.

1976-01-01

Sodium pyrophosphate was chosen for its ease of application and the quality of the images it gives. The aim of this study, in the context of breast cancer exploration, is to examine: - its reliability for the detection of bone metastases, - the correlation of its results with other factors. The first part reviews the properties of sup(99m)Tc-labelled sodium pyrophosphate and the current hypotheses on the mechanism of its bone fixation, essential for an understanding of the image formation mechanism and for the interpretation of anomalies. Part two gives an analysis of 311 examinations carried out on 223 patients, obtained by the use of a coded file and modern data processing methods. The following are dealt with in turn: - material and methods, - the results themselves and especially their reliability for the whole skeleton and for one bone at a time, - discussion and comparison with published data. Sup(99m)Tc pyrophosphate bone scintigraphy is a simple examination easy to interpret and allows the whole skeleton to be explored. Abnormal scintigraphic images are: - seldom hypofixing lacunae, - usually 'hyperfixing centres' which point to a perilesional bone reaction and depend on: vascular factors, the affinity of technetium for the immature collagen fibres of the forming bone matrix, the affinity of pyrophosphate for the bone mineral substance [fr

El cerebro como estructura disipativa

OpenAIRE

López‐Cabanas Euba, Ignacio Javier

2012-01-01

Se pretende dilucidar la función fisiológica de las ondas cerebrales. Para ello se considerará el cerebro una “estructura disipativa”, comprendida ésta dentro de la termodinámica del no equilibrio. Esta concepción supone implicaciones drásticas en la práctica, dotando a los estados alterados de conciencia de un potencial capaz de explicar los procesos de reorganización sináptica ocurridos durante el descanso de las distintas zonas cerebrales

DISEÑO Y CONSTRUCCIÓN DE UNA INTERFAZ ELECTRÓNICA QUE PERMITA RECOGER LOS BIPOTENCIALES ELÉCTRICOS DEL CEREBRO DE UN PACIENTE MEDIANTE TECNOLOGÍA INALÁMBRICA PARA ENVIARLOS A UNA PC

OpenAIRE

Gavino Morales, Cristhian Andres; Gallardo Hi Fong, Josue Enrique

2016-01-01

El presente trabajo se encuentra dirigido hacia el estudio de la actividad eléctrica del cerebro, el cual permitirá visualizar cada una de las ondas cerebrales del individuo de forma remota, para lo cual se ha desarrollado un electroencefalógrafo. El estudio de las ondas cerebrales sirve para detectar anomalías en actividad eléctrica del cerebro; para la detección de enfermedades que alteran el correcto funcionamiento del cerebro y su análisis, se...

Therapeutic Effect of Exosomes on Ischemic Stroke in Experimental Animals

OpenAIRE

Carvallo, P; Astudillo, P

2016-01-01

La posibilidad de que los exosomas funcionen como una nueva forma de comunicación intercelular para establecer y mantener circuitos cerebrales está comenzando a ser explorada. Los exosomas son liberados desde células e interactúan con otras células receptoras para mediar cambios fisiológicos. Todas las células cerebrales liberan exosomas incluyendo las celulas madre neuronales, las neuronas, astrocitos, microglia, oligodendrocitos y las celulas endoteliales. El objetivo de esta revisión es re...

Gender and Performance in Accounting Examinations: Exploring the Impact of Examination Format

Science.gov (United States)

Arthur, Neal; Everaert, Patricia

2012-01-01

This paper addresses the question of whether the increasing use of multiple-choice questions will favour particular student groups, i.e. male or female students. Using data from Belgium, this paper empirically examines the existence of a gender effect by comparing the relative performance of male and female students in both multiple-choice and…

Exploring the Potential of a Wearable Camera to Examine the Early Obesogenic Home Environment: Comparison of SenseCam Images to the Home Environment Interview

NARCIS (Netherlands)

Schrempft, S.; Jaarsveld, C.H.M. van; Fisher, A.

2017-01-01

BACKGROUND: The obesogenic home environment is usually examined via self-report, and objective measures are required. OBJECTIVE: This study explored whether the wearable camera SenseCam can be used to examine the early obesogenic home environment and whether it is useful for validation of

Diseño y construcción de una interfaz electrónica que permita recoger los bipotenciales eléctricos del cerebro de un paciente mediante tecnología inalámbrica para enviarlos a una pc

OpenAIRE

Gavino Morales, Cristhian Andrés; Gallardo Hi-Fong, Josue Enrique; Yapur Auad, Miguel

2014-01-01

El presente trabajo se encuentra dirigido hacia el estudio de la actividad eléctrica del cerebro, el cual permitirá visualizar cada una de las ondas cerebrales del individuo de forma remota, para lo cual se ha desarrollado un electroencefalógrafo. El estudio de las ondas cerebrales sirve para detectar anomalías en actividad eléctrica del cerebro; para la detección de enfermedades que alteran el correcto funcionamiento del cerebro y su análisis, se utiliza un EEG. El diseño de este electroe...

El cerebro y las drogas, sus mecanismos neurobiológicos

OpenAIRE

Méndez Díaz, Mónica; Ruiz Contreras, Alejandra E.; Prieto Gómez, Berta; Romano, Antonio; Caynas, Seraid; Prospéro García, Oscar

2010-01-01

La definición de adicción propuesta por la Organización Mundial de la Salud, dicha de manera sucinta, indica que es una enfermedad cerebral que provoca una búsqueda compulsiva de la droga y su uso, a pesar de las consecuencias adversas que ésta provoque. La fisiopatología de la enfermedad sugiere una interacción entre mecanismos cerebrales, cambios genéticos y medio ambiente. El objetivo de este artículo es discutir la evidencia que existe sobre los sistemas cerebrales que son afectados por l...

Neurobiología del autismo y TDAH mediante técnicas de neuroimagen: divergencias y convergencias

OpenAIRE

Proal, Erika; Olvera, Jorge González; Blancas, Aurea S.; Chalita, Pablo J.; Castellanos, F. Xavier

2013-01-01

En el área clínica algunos síntomas del trastorno por déficit de atención e hiperactividad (TDAH), se presentan en los pacientes con trastorno del espectro autista (TEA). Se ha demostrado que existen alteraciones en circuitos cerebrales que impactan en fallas cognitivas y de comportamiento específicas de cada uno de estos trastornos. Sin embargo, han sido poco estudiados los correlatos cerebrales que hay detrás tanto de las similitudes como de las diferencias sintomatológicas. En la presente ...

Efecto del ejercicio aeróbico y la estimulación ambiental sobre la reducción de los niveles de ansiedad en el envejecimiento

Directory of Open Access Journals (Sweden)

Patricia Sampedro Piquero

2015-08-01

Full Text Available El enriquecimiento ambiental (EAM y el ejercicio aeróbico (EJ son intervenciones capaces de reducir la ansiedad durante el envejecimiento, pero poco se sabe acerca de cómo modulan las proyecciones cerebrales hacia el eje hipotálamo-pituitario adrenal (HPA. Estudiamos el efecto de un programa de EAM y de EJ durante 2 meses en ratas Wistar macho de 18 meses de edad asignadas aleatoriamente a tres grupos: control (CO, n=6, EAM (n=8 y EJ (n=8. El programa de ejercicio fue llevado a cabo 15min/día y el grupo EAM fue estabulado en una jaula de grandes dimensiones con diferentes objetos renovados frecuentemente. Mediante la histoquímica de la citocromo c oxidasa (COx estudiamos la actividad metabólica de regiones cerebrales implicadas en la respuesta de ansiedad. El EAM redujo la actividad metabólica de regiones cerebrales implicadas en activar al eje HPA (corteza infralímbica, amígdala basolateral y núcleo paravetricular hipotalámico, (p<0.05. Por otro lado, el EJ aumentó la actividad de regiones implicadas en la inhibición (corteza cingulada, núcleo del lecho de la estría terminal e hipocampo dorsal, (p<0.05. En conclusión, parece que el EAM y el EJ modulan de forma diferente la actividad de regiones cerebrales que proyectan al eje HPA y podrían constituir intervenciones eficaces para reducir los niveles de ansiedad durante el envejecimiento.

Exploring the concept of "caring cultures": A critical examination of the conceptual, methodological and validity issues with the "caring cultures" construct.

Science.gov (United States)

Gillin, Nicola; Taylor, Ruth; Walker, Susan

2017-12-01

To critically examine the conceptual, methodological and validity issues with the "caring cultures" construct. Post the Francis Report, "caring cultures" and alternative terminology such as "culture/s of care/caring/compassionate care" have gained prominence in the literature, especially within a UK policy context. However, in order to understand the value these "caring cultures" hold in terms of clinical practice, the concept itself first needs to be understood. A discussion and critical examination of the concept of "caring cultures" and associated terminology. Grey literature, database, library and reference list searches were conducted. It is implied that "caring cultures" influence patient care. However, evidence which verifies this assertion is limited. In this article, the concept of "caring cultures" is deconstructed and its validity explored. An alternative to "caring cultures" is proposed in terms of research, whereby the concept of culture is instead explored in detail, on a microsystem level, using appropriate methodology. The concept of "caring cultures", although attractive in terms of its apparent simplicity, is not considered the most useful nor appropriate phrases in terms of advancing research. Instead, research which examines the established concept of "culture" in relation to outcomes such as patient care, doing so with an appropriate methodology, is viewed as a more suitable alternative. Clarifying concepts and terminology relating to "caring cultures" is essential for research to progress and the impact of culture on clinical practice to be better understood. © 2017 John Wiley & Sons Ltd.

Una caja de ritmos llamada cerebro: Moviendo objetos con la mente.

Directory of Open Access Journals (Sweden)

Ángel Correa Torres

2008-01-01

Full Text Available El cerebro genera ritmos sin parar. Los ritmos cerebrales constituyen un lenguaje de comunicación entreneuronas mientras procesan información. La investigación dedicada a descifrar este lenguaje está revolucionando tanto teorías neurocientíficas como aplicaciones clínicas y tecnológicas. Hoy se piensa que los ritmos cerebrales cumplen un papel crucial en funciones cognitivas como percibir, recordar o moverse. El control a través del pensamiento de objetos electrónicos reales o virtuales ha dejado de ser una ficción gracias al desarrollo de la interfaz cerebro-computadora.

Laying the Groundwork for NCLEX Success: An Exploration of Adaptive Quizzing as an Examination Preparation Method.

Science.gov (United States)

Cox-Davenport, Rebecca A; Phelan, Julia C

2015-05-01

First-time NCLEX-RN pass rates are an important indicator of nursing school success and quality. Nursing schools use different methods to anticipate NCLEX outcomes and help prevent student failure and possible threat to accreditation. This study evaluated the impact of a shift in NCLEX preparation policy at a BSN program in the southeast United States. The policy shifted from the use of predictor score thresholds to determine graduation eligibility to a more proactive remediation strategy involving adaptive quizzing. A descriptive correlational design evaluated the impact of an adaptive quizzing system designed to give students ongoing active practice and feedback and explored the relationship between predictor examinations and NCLEX success. Data from student usage of the system as well as scores on predictor tests were collected for three student cohorts. Results revealed a positive correlation between adaptive quizzing system usage and content mastery. Two of the 69 students in the sample did not pass the NCLEX. With so few students failing the NCLEX, predictability of any course variables could not be determined. The power of predictor examinations to predict NCLEX failure could also not be supported. The most consistent factor among students, however, was their content mastery level within the adaptive quizzing system. Implications of these findings are discussed.

Exploring virtual reality technology and the Oculus Rift for the examination of digital pathology slides

Directory of Open Access Journals (Sweden)

Navid Farahani

2016-01-01

Full Text Available Background: Digital slides obtained from whole slide imaging (WSI platforms are typically viewed in two dimensions using desktop personal computer monitors or more recently on mobile devices. To the best of our knowledge, we are not aware of any studies viewing digital pathology slides in a virtual reality (VR environment. VR technology enables users to be artificially immersed in and interact with a computer-simulated world. Oculus Rift is among the world′s first consumer-targeted VR headsets, intended primarily for enhanced gaming. Our aim was to explore the use of the Oculus Rift for examining digital pathology slides in a VR environment. Methods: An Oculus Rift Development Kit 2 (DK2 was connected to a 64-bit computer running Virtual Desktop software. Glass slides from twenty randomly selected lymph node cases (ten with benign and ten malignant diagnoses were digitized using a WSI scanner. Three pathologists reviewed these digital slides on a 27-inch 5K display and with the Oculus Rift after a 2-week washout period. Recorded endpoints included concordance of final diagnoses and time required to examine slides. The pathologists also rated their ease of navigation, image quality, and diagnostic confidence for both modalities. Results: There was 90% diagnostic concordance when reviewing WSI using a 5K display and Oculus Rift. The time required to examine digital pathology slides on the 5K display averaged 39 s (range 10-120 s, compared to 62 s with the Oculus Rift (range 15-270 s. All pathologists confirmed that digital pathology slides were easily viewable in a VR environment. The ratings for image quality and diagnostic confidence were higher when using the 5K display. Conclusion: Using the Oculus Rift DK2 to view and navigate pathology whole slide images in a virtual environment is feasible for diagnostic purposes. However, image resolution using the Oculus Rift device was limited. Interactive VR technologies such as the Oculus Rift are

Exploring virtual reality technology and the Oculus Rift for the examination of digital pathology slides.

Science.gov (United States)

Farahani, Navid; Post, Robert; Duboy, Jon; Ahmed, Ishtiaque; Kolowitz, Brian J; Krinchai, Teppituk; Monaco, Sara E; Fine, Jeffrey L; Hartman, Douglas J; Pantanowitz, Liron

2016-01-01

Digital slides obtained from whole slide imaging (WSI) platforms are typically viewed in two dimensions using desktop personal computer monitors or more recently on mobile devices. To the best of our knowledge, we are not aware of any studies viewing digital pathology slides in a virtual reality (VR) environment. VR technology enables users to be artificially immersed in and interact with a computer-simulated world. Oculus Rift is among the world's first consumer-targeted VR headsets, intended primarily for enhanced gaming. Our aim was to explore the use of the Oculus Rift for examining digital pathology slides in a VR environment. An Oculus Rift Development Kit 2 (DK2) was connected to a 64-bit computer running Virtual Desktop software. Glass slides from twenty randomly selected lymph node cases (ten with benign and ten malignant diagnoses) were digitized using a WSI scanner. Three pathologists reviewed these digital slides on a 27-inch 5K display and with the Oculus Rift after a 2-week washout period. Recorded endpoints included concordance of final diagnoses and time required to examine slides. The pathologists also rated their ease of navigation, image quality, and diagnostic confidence for both modalities. There was 90% diagnostic concordance when reviewing WSI using a 5K display and Oculus Rift. The time required to examine digital pathology slides on the 5K display averaged 39 s (range 10-120 s), compared to 62 s with the Oculus Rift (range 15-270 s). All pathologists confirmed that digital pathology slides were easily viewable in a VR environment. The ratings for image quality and diagnostic confidence were higher when using the 5K display. Using the Oculus Rift DK2 to view and navigate pathology whole slide images in a virtual environment is feasible for diagnostic purposes. However, image resolution using the Oculus Rift device was limited. Interactive VR technologies such as the Oculus Rift are novel tools that may be of use in digital pathology.

First Steps into Language? Examining the Specific Longitudinal Relations between Walking, Exploration and Linguistic Skills.

Science.gov (United States)

Oudgenoeg-Paz, Ora; Volman, M Chiel J M; Leseman, Paul P M

2016-01-01

Recent empirical evidence demonstrates relationships between motor and language development that are partially mediated by exploration. This is in line with the embodied cognition approach to development that views language as grounded in real-life sensorimotor interactions with the environment. This view implies that the relations between motor and linguistic skills should be specific. Moreover, as motor development initially changes the possibilities children have to explore the environment, initial relations between motor and linguistic skills should become weaker over time. Empirical evidence pertaining to the duration and specificity of these relations is still lacking. The current study investigated longitudinal relations between attainment of walking and the development of several linguistic skills, and tested whether exploration through self-locomotion mediated these relations. Linguistic skills were measured at age 43 months, which is later than the age used in previous studies. Three hypotheses were tested: (1) the relations between walking and language found at younger ages will decrease over time (2) exploration through self-locomotion will remain an important predictor of spatial language (3) no relation will be found between walking, exploration and the use of grammatical and lexical categories and between exploration and general vocabulary. Thirty-one Dutch children took part in a longitudinal study. Parents reported about age of attainment of walking. Exploration through self-locomotion was measured using observations of play with a standard set of toys at age 20 months. Receptive vocabulary, spatial language and use of grammatical and lexical categories were measured at age 43 months using (standard) tests. Results reveal that age of walking does not directly predict spatial language at age 43 months. Exploration through self-locomotion does significantly and completely mediate the indirect effect of age of walking on spatial language. Moreover

First steps into language? Examining the specific longitudinal relations between walking, exploration and linguistic skills

Directory of Open Access Journals (Sweden)

Ora Oudgenoeg-Paz

2016-09-01

Full Text Available Recent empirical evidence demonstrates relationships between motor and language development that are partially mediated by exploration. This is in line with the embodied cognition approach to development that views language as grounded in real-life sensorimotor interactions with the environment. This view implies that the relations between motor and linguistic skills should be specific. Moreover, as motor development initially changes the possibilities children have to explore the environment, initial relations between motor and linguistic skills should become weaker over time. Empirical evidence pertaining to the duration and specificity of these relations is still lacking. The current study investigated longitudinal relations between attainment of walking and the development of several linguistic skills, and tested whether exploration through self-locomotion mediated these relations. Linguistic skills were measured at age 43 months, which is later than the age used in previous studies. Three hypotheses were tested: (1 the relations between walking and language found at younger ages will decrease over time (2 exploration through self-locomotion will remain an important predictor of spatial language (3 no relation will be found between walking, exploration and the use of grammatical and lexical categories and between exploration and general vocabulary. Thirty-one Dutch children took part in a longitudinal study. Parents reported about age of attainment of walking. Exploration through self-locomotion was measured using observations of play with a standard set of toys at age 20 months. Receptive vocabulary, spatial language and use of grammatical and lexical categories were measured at age 43 months using (standard tests. Results reveal that age of walking does not directly predict spatial language at age 43 months. Exploration through self-locomotion does significantly and completely mediate the indirect effect of age of walking on spatial

Geovisualization applications to examine and explore high-density and hierarchical critical infrastructure data

Science.gov (United States)

Edsall, Robert; Hembree, Harvey

2018-05-01

The geospatial research and development team in the National and Homeland Security Division at Idaho National Laboratory was tasked with providing tools to derive insight from the substantial amount of data currently available - and continuously being produced - associated with the critical infrastructure of the US. This effort is in support of the Department of Homeland Security, whose mission includes the protection of this infrastructure and the enhancement of its resilience to hazards, both natural and human. We present geovisual-analytics-based approaches for analysis of vulnerabilities and resilience of critical infrastructure, designed so that decision makers, analysts, and infrastructure owners and managers can manage risk, prepare for hazards, and direct resources before and after an incident that might result in an interruption in service. Our designs are based on iterative discussions with DHS leadership and analysts, who in turn will use these tools to explore and communicate data in partnership with utility providers, law enforcement, and emergency response and recovery organizations, among others. In most cases these partners desire summaries of large amounts of data, but increasingly, our users seek the additional capability of focusing on, for example, a specific infrastructure sector, a particular geographic region, or time period, or of examining data in a variety of generalization or aggregation levels. These needs align well with tenets of in-formation-visualization design; in this paper, selected applications among those that we have designed are described and positioned within geovisualization, geovisual analytical, and information visualization frameworks.

Exploring Size.

Science.gov (United States)

Brand, Judith, Ed.

1995-01-01

"Exploring" is a magazine of science, art, and human perception that communicates ideas museum exhibits cannot demonstrate easily by using experiments and activities for the classroom. This issue concentrates on size, examining it from a variety of viewpoints. The focus allows students to investigate and discuss interconnections among…

Brain SPECT in childhood; Temp cerebrale chez l'enfant

Energy Technology Data Exchange (ETDEWEB)

Tranquart, F; Saliba, E; Prunier, C; Baulieu, F; Besnard, J C; Guilloteau, D; Baulieu, J L [Hopital Bretonneau, Service de Medecine Nucleaire, Unite Inserm 316, 37 - Tours (France)

2001-04-01

The modalities and the indications of perfusion and neurotransmission SPECT in childhood are presented. The perfusion as well as neurotransmission tracers have not yet authorization for use in children; they have to be used by prescription of magistral preparation or in research protocols. The radioprotection rules have to be strictly respected. The most frequent indication of perfusion SPECT is pharmacologically resistant epilepsy; the ictal SPECT before surgery allows the localization of the epileptogenic focus. Other indications are relevant in the prognosis of neonatal anoxia and encephalitis. In psychiatric disorders, especially in autism, the interest is the physiopathological approach of the brain dysfunctions. The neurotransmission SPECT is emerging as a consequence of the development of new radiotracer, as the dopaminergic system ligands. The decrease of the dopamine D2 receptors in the striatum can be imaged and quantified in the neonate. The lesions of dopamine system seem to be a consequence of the neonatal hypoxia-ischemia and it is predictive of motor sequelae. Brain SPECT should become a routine examination in child neurologic and psychiatric disorders. (authors)

Exploration for fossil and nuclear fuels from orbital altitudes. [results of ERTS program for oil exploration

Science.gov (United States)

Short, N. M.

1974-01-01

Results from the ERTS program pertinent to exploration for oil, gas, and uranium are discussed. A review of achievements in relevant geological studies from ERTS, and a survey of accomplishments oriented towards exploration for energy sources are presented along with an evaluation of the prospects and limitations of the space platform approach to fuel exploration, and an examination of continuing programs designed to prove out the use of ERTS and other space system in exploring for fuel resources.

25 CFR 216.4 - Technical examination of prospective surface exploration and mining operations.

Science.gov (United States)

2010-04-01

... mining sites and mining operations vary widely with respect to topography, climate, surrounding land uses... and mining operations. 216.4 Section 216.4 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR ENERGY AND MINERALS SURFACE EXPLORATION, MINING, AND RECLAMATION OF LANDS General Provisions § 216...

2018-05-09T12:11:53Z https://www.ajol.info/index.php/all/oai oai:ojs ...

African Journals Online (AJOL)

article/7559 2018-05-09T12:11:53Z ajns:ART HYDROCEPHALIE: UN CAS RARE DE TOXOPLAMOSE CEREBRALE DANS LE CADRE D\\'UN SYNDROME D\\'IMMUNO-DEFICIENCE ACQUISE Djientcheu, Vincent de Paul; Neurosurgery Unit, ...

TUMORES CEREBRALES ASOCIADOS A EPILEPSIA

Directory of Open Access Journals (Sweden)

Dr. Manuel G. Campos

2017-05-01

La Resonancia Magnética de cerebro es mandatoria en el estudio de todo paciente con epilepsia, para detectar lesiones estructurales, especialmente en epilepsia focal. Alrededor del 30% de los pacientes operados de epilepsia refractaria presentan tumores. En estos casos el control de crisis post-operatorio llega hasta un 70% en el seguimiento a largo plazo.

Estudio de la asimetría interhemisférica en la corteza prefrontal dorsolateral de sujetos humanos

Directory of Open Access Journals (Sweden)

Hernán J. Pimienta J.

2005-03-01

Full Text Available Se presentan los resultados de un trabajo de investigación encaminado a establecer las diferencias entre los hemisferios cerebrales de la corteza prefrontal dorsolateral: áreas 46 laeral y 7 medial, de sujetos humanos.

Changing Perspectives: Exploring a Pedagogy to Examine Other Perspectives about Stem Cell Research

Science.gov (United States)

France, Bev; Mora, Helen A.; Bay, Jacquie L.

2012-01-01

This study explores how teachers developed and critically evaluated a range of teaching strategies that could support the discussion of a socio-scientific issue (SSI) that had the potential to be controversial. The issue was stem cell research and six New Zealand teachers of senior biology students (grades 12/13) took part in an action research…

Examination of anomalous self-experience

DEFF Research Database (Denmark)

Raballo, Andrea; Parnas, Josef

2012-01-01

. Here, we present the initial normative data and psychometric properties of a newly developed instrument (Examination of Anomalous Self-experience [EASE]), specifically designed to support the psychopathological exploration of SDs in both research and "real world" clinical settings. Our results support...

Toward a More Complex View of Career Exploration

Science.gov (United States)

Zikic, Jelena; Hall, Douglas T.

2009-01-01

This article examines the concept of career exploration in adult populations. In contrast to the prevailing positive view of career exploration, the authors present a more complex and balanced perspective of this process, addressing some of the barriers to career exploration and the applicability of this concept to different populations. They…

School-based assessments in high-stakes examinations in Bhutan: a question of trust? : exploring inconsistencies between external exam scores, school-based assessments, detailed teacher ratings, and student self-ratings

NARCIS (Netherlands)

Luyten, Johannes W.; Dolkar, Dechen

2010-01-01

This study explores the validity of school-based assessments when they serve to supplement scores on central tests in high-stakes examinations. The school-based continuous assessment (CA) marks are compared to the marks scored on the central written Bhutan Certificate of Secondary Education (BCSE)

Un chichón en la cabeza (A Bump on the Head)

Centers for Disease Control (CDC) Podcasts

En este podcast para chicos, los personajes de Kidtastics hablan de las conmociones cerebrales: su gravedad, los síntomas y lo que se debe hacer cuando se cree que uno puede tener una conmoción cerebral.

Imágenes Neuro–Oftalmológicas

Directory of Open Access Journals (Sweden)

C. Gonzalo Rojas, Ing.

2010-11-01

Mediante resonancia magnética funcional es posible localizar las áreas elocuentes cerebrales (resonancia magnética funcional convencional o representar la conexión funcional de un área cerebral específica (resonancia magnética resting state.

Sustaining Exploration in Mature Basins

International Nuclear Information System (INIS)

Bayo, A.

2002-01-01

Exploration is a business like any other business driven by opportunity, resources and expectation of profit. Therefore, exploration will thrive anywhere the opportunities are significant, the resources are available and the outlook for profit (or value creation) is good. To sustain exploration activities anywhere, irrespective of the environment, there must be good understanding of the drivers of these key investment criteria. This paper will examine these investment criteria as they relate to exploration business and address the peculiarity of exploration in mature basin. Mature basins are unique environment that lends themselves a mix of fears, paradigms and realities, particularly with respect to the perception of value. To sustain exploration activities in a mature basin, we need to understand these perceptions relative to the true drivers of profitability. Exploration in the mature basins can be as profitable as exploration in emerging basins if the dynamics of value definition-strategic and fiscal values are understood by operators, regulators and co ventures alike. Some suggestions are made in this presentation on what needs to be done in addressing these dynamic investment parameters and sustaining exploration activities in mature basins

Brain SPECT in childhood; Temp cerebrale chez l'enfant

Energy Technology Data Exchange (ETDEWEB)

Tranquart, F.; Saliba, E.; Prunier, C.; Baulieu, F.; Besnard, J.C.; Guilloteau, D.; Baulieu, J.L. [Hopital Bretonneau, Service de Medecine Nucleaire, Unite Inserm 316, 37 - Tours (France)

2001-04-01

The modalities and the indications of perfusion and neurotransmission SPECT in childhood are presented. The perfusion as well as neurotransmission tracers have not yet authorization for use in children; they have to be used by prescription of magistral preparation or in research protocols. The radioprotection rules have to be strictly respected. The most frequent indication of perfusion SPECT is pharmacologically resistant epilepsy; the ictal SPECT before surgery allows the localization of the epileptogenic focus. Other indications are relevant in the prognosis of neonatal anoxia and encephalitis. In psychiatric disorders, especially in autism, the interest is the physiopathological approach of the brain dysfunctions. The neurotransmission SPECT is emerging as a consequence of the development of new radiotracer, as the dopaminergic system ligands. The decrease of the dopamine D2 receptors in the striatum can be imaged and quantified in the neonate. The lesions of dopamine system seem to be a consequence of the neonatal hypoxia-ischemia and it is predictive of motor sequelae. Brain SPECT should become a routine examination in child neurologic and psychiatric disorders. (authors)

Consistency and Inconsistency in PhD Thesis Examination

Science.gov (United States)

Holbrook, Allyson; Bourke, Sid; Lovat, Terry; Fairbairn, Hedy

2008-01-01

This is a mixed methods investigation of consistency in PhD examination. At its core is the quantification of the content and conceptual analysis of examiner reports for 804 Australian theses. First, the level of consistency between what examiners say in their reports and the recommendation they provide for a thesis is explored, followed by an…

African Journal of Neurological Sciences 2010 - Vol. 29, No 2 http ...

African Journals Online (AJOL)

29, No 2 http://ajns.paans.org. 3. CLINICAL STUDIES / ETUDE CLINIQUES. CONTRIBUTION DE LA BIOPSIE STEREOTAXIQUE DANS LA PRISE EN CHARGE DES TUMEURS. CEREBRALES: A PROPOS DE 283 CAS. CONTRIBUTION OF STEREOTAXIC BIOPSY IN THE MANAGEMENT OF BRAIN TUMORS: A PROPOS.

Investment in exploration by the US uranium industry

International Nuclear Information System (INIS)

Cohen, W.

1982-09-01

This report examines investment in domestic uranium exploration by US companies. In addition to examining the influence of typically considered variables such as expected price of output, expected cost of production, cost of capital, and reserve holdings, the analysis also considers the influence of selected attributes of the corporations involved, including cash flow, exploration expertise, and corporate investment strategy. This latter class of variables (i.e., corporate variables) has never been considered in the analysis of the determination of industry investment behavior. The sample includes observations of 25 firms' behavior over a period of 7 years, 1973 through 1979. In addition to supporting the energy Information Administration's more comprehensive uranium market modelling efforts, an interesting question this study addresses is the role of major oil companies in the uranium exploration field. The results suggest that expected profit and level of reserve holdings significantly affect exploration effort. It is also found that firms with greater cash flow and depth of in-house exploration expertise will explore more than firms with less. On the other hand, the results do not suggest that firms' diversification strategies differentiate their exploration in the short run. For instance, in the uranium industry, mineral firms do not behave differently from energy (e.g., oil) firms, once the other determinants of investment in exploration are considered. In conclusion, the results demonstrate that corporate variables should be considered in models of uranium exploration. Their consideration will enhance the ability to model exploration behavior accurately. 10 tables

Earthworms, Dirt, and Rotten Leaves: An Exploration in Ecology.

Science.gov (United States)

McLaughlin, Molly

1994-01-01

This article provides a model for inviting children to "an exploration in ecology" by observing earthworms. It gives reasons to explore earthworms and guides the investigator through a detailed examination of the worms to answer 21 observation questions. Explores the ways in which earthworms interact with their environment. (LZ)

Predicting Scheduling and Attending for an Oral Cancer Examination

Science.gov (United States)

Shepperd, James A.; Emanuel, Amber S.; Howell, Jennifer L.; Logan, Henrietta L.

2015-01-01

Background Oral and pharyngeal cancer is highly treatable if diagnosed early, yet late diagnosis is commonplace apparently because of delays in undergoing an oral cancer examination. Purpose We explored predictors of scheduling and attending an oral cancer examination among a sample of Black and White men who were at high risk for oral cancer because they smoked. Methods During an in-person interview, participants (N = 315) from rural Florida learned about oral and pharyngeal cancer, completed survey measures, and were offered a free examination in the next week. Later, participants received a follow-up phone call to explore why they did or did not attend their examination. Results Consistent with the notion that scheduling and attending an oral cancer exam represent distinct decisions, we found that the two outcomes had different predictors. Defensive avoidance and exam efficacy predicted scheduling an examination; exam efficacy and having coping resources, time, and transportation predicted attending the examination. Open-ended responses revealed that the dominant reasons participants offered for missing a scheduled examination was conflicting obligations, forgetting, and confusion or misunderstanding about the examination. Conclusions The results suggest interventions to increase scheduling and attending an oral cancer examination. PMID:26152644

StreamExplorer: A Multi-Stage System for Visually Exploring Events in Social Streams.

Science.gov (United States)

Wu, Yingcai; Chen, Zhutian; Sun, Guodao; Xie, Xiao; Cao, Nan; Liu, Shixia; Cui, Weiwei

2017-10-18

Analyzing social streams is important for many applications, such as crisis management. However, the considerable diversity, increasing volume, and high dynamics of social streams of large events continue to be significant challenges that must be overcome to ensure effective exploration. We propose a novel framework by which to handle complex social streams on a budget PC. This framework features two components: 1) an online method to detect important time periods (i.e., subevents), and 2) a tailored GPU-assisted Self-Organizing Map (SOM) method, which clusters the tweets of subevents stably and efficiently. Based on the framework, we present StreamExplorer to facilitate the visual analysis, tracking, and comparison of a social stream at three levels. At a macroscopic level, StreamExplorer uses a new glyph-based timeline visualization, which presents a quick multi-faceted overview of the ebb and flow of a social stream. At a mesoscopic level, a map visualization is employed to visually summarize the social stream from either a topical or geographical aspect. At a microscopic level, users can employ interactive lenses to visually examine and explore the social stream from different perspectives. Two case studies and a task-based evaluation are used to demonstrate the effectiveness and usefulness of StreamExplorer.Analyzing social streams is important for many applications, such as crisis management. However, the considerable diversity, increasing volume, and high dynamics of social streams of large events continue to be significant challenges that must be overcome to ensure effective exploration. We propose a novel framework by which to handle complex social streams on a budget PC. This framework features two components: 1) an online method to detect important time periods (i.e., subevents), and 2) a tailored GPU-assisted Self-Organizing Map (SOM) method, which clusters the tweets of subevents stably and efficiently. Based on the framework, we present StreamExplorer

Antarctica: Discovery & Exploration.

Science.gov (United States)

Gascoigne, Toss; Collett, Peter

An examination of Antarctica, from the first sightings to the heroic explorations of the late 18th and early 19th centuries to modern-day research, is presented in this book. Twelve chapters are as follows: (1) The search begins; (2) Whalers and sealers: bites and nibbles; (3) The new continent: first sight; (4) Wintering: the first party; (5)…

Telerobotic exploration and development of the Moon

Indian Academy of Sciences (India)

There has been a debate for the last thirty years about the relative merits of human versus robotic systems and we argue here that both are essential components for successful lunar exploration and development.We examine the role of robots in the next phases of exploration and human development of the Moon.

Assessing gross motor function, functional skills, and caregiver assistance in children with cerebral palsy (CP) and cerebral visual impairment (CVI)

NARCIS (Netherlands)

Salavati, Abul

2016-01-01

De inhoud van dit proefschrift heeft betrekking op kinderen met aangeboren hersenbeschadiging, Cerebrale Parese (CP), bij wie ook sprake is van onder andere visuele waarnemingsproblemen. Bij kinderen met CP kunnen problemen op het gebied van visuele waarneming in het oog en/of in de hersenen

Practical measures to promote exploration in developing countries

International Nuclear Information System (INIS)

Sohall, H.M.

1991-01-01

Since 1950, Pakistan has gone through several phases of hydrocarbon exploration, but despite our geologically prospective areas, our discovery and development of substantial reserves, and our existing infrastructure facilities, exploration has been limited. We attribute this limited exploration to the absence of long-term gas-development strategies, to the gas-price formula, and to legislative and contractual frameworks for concession agreements in use for most of our exploration history. This paper examines Pakistan's exploration history and reveals current gas-development strategies. It also discusses the revised pricing formula and legislation to benefit other developing countries that are in similar situations and want to accelerate the pace of their exploration activities

Contingencies for Success: Examining Diversity Committees in Higher Education

Science.gov (United States)

Leon, Raul A.; Williams, Damon A.

2016-01-01

This study focused on an examination of the work of 10 diversity committees operating in 10 research institutions across the midwestern region of the United States. We explored the work of these committees with a focus on the concept of strategic diversity leadership. To conduct this examination we examined five contingencies impacting the work of…

Life sciences and Mars exploration

Science.gov (United States)

Sulzman, Frank M.; Rummel, John D.; Leveton, Lauren B.; Teeter, Ron

1990-01-01

The major life science considerations for Mars exploration missions are discussed. Radiation protection and countermeasures for zero gravity are discussed. Considerations of crew psychological health considerations and life support systems are addressed. Scientific opportunities presented by manned Mars missions are examined.

Is primary prevention with antiepileptic drugs effective in brain tumors or brain metastases?

Directory of Open Access Journals (Sweden)

Diego Lobos-Urbina

2017-03-01

Full Text Available Resumen Los pacientes con tumores cerebrales, primarios o metastásicos, presentan riego de desarrollar convulsiones durante la evolución de su enfermedad, por lo que se ha propuesto el uso profiláctico de anticonvulsivantes. Sin embargo, el efecto de esta intervención no está claro. Para responder esta pregunta utilizamos la base de datos Epistemonikos, la cual es mantenida mediante búsquedas en múltiples bases de datos. Identificamos 12 revisiones sistemáticas que en conjunto incluyen ochenta estudios primarios. Doce corresponden a estudios aleatorizados, pero sólo dos responden la pregunta de interés. Extrajimos los datos, realizamos un metanálisis y preparamos una tabla de resumen de los resultados utilizando el método GRADE. Concluimos que la prevención primaria con anticonvulsivantes podría no disminuir el riesgo de convulsiones en tumores o metástasis cerebrales, y se asocia a efectos adversos frecuentes.

First steps into language? Examining the specific longitudinal relations between walking, exploration and linguistic skills

NARCIS (Netherlands)

Oudgenoeg - Paz, Ora; Volman, Chiel; Leseman, Paul

2016-01-01

Recent empirical evidence demonstrates relationships between motor and language development that are partially mediated by exploration. This is in line with the embodied cognition approach to development that views language as grounded in real-life sensorimotor interactions with the environment.

First steps into language? : Examining the specific longitudinal relations between walking, exploration and linguistic skills

NARCIS (Netherlands)

Oudgenoeg-Paz, O.; Volman, M.J.M.; Leseman, P.P.M.

2017-01-01

Recent empirical evidence demonstrates relationships between motor and language development that are partially mediated by exploration. This is in line with the embodied cognition approach to development that views language as grounded in real-life sensorimotor interactions with the environment.

Exploring Narcissism, Psychopathy, and Machiavellianism in Youth: Examination of Associations with Antisocial Behavior and Aggression

Science.gov (United States)

Lau, Katherine S. L.; Marsee, Monica A.

2013-01-01

We sought to explore the differential associations of callous-unemotional (CU) traits, narcissistic traits, and Machiavellian traits with overt aggression, relational aggression, delinquency, behavioral dysregulation, and emotional dysregulation in a community sample of boys and girls (ages 11-17). Results indicated that the three personality…

Informed consent - Providing information about prenatal examinations

DEFF Research Database (Denmark)

Dahl, Katja; Kesmodel, Ulrik; Hvidman, Lone

as well.The review is based on systematic search strategy in the electronic databases Medline and Science Citation. Additional studies were identified through reference lists of individual papers obtained. Improving knowledge scores and reducing decisional conflict can be obtained by group counselling...... pregnant women about prenatal examinations. Women's knowledge, decisional conflict, satisfaction and anxiety will be explored as compared with different ways and different groups of health professionals providing information. To what extent information empowers informed decision making will be explored...

Human exploration and settlement of Mars - The roles of humans and robots

Science.gov (United States)

Duke, Michael B.

1991-01-01

The scientific objectives and strategies for human settlement on Mars are examined in the context of the Space Exploration Initiative (SEI). An integrated strategy for humans and robots in the exploration and settlement of Mars is examined. Such an effort would feature robotic, telerobotic, and human-supervised robotic phases.

Examining Preservice Teachers' Culturally Responsive Teaching Self-Efficacy Doubts

Science.gov (United States)

Siwatu, Kamau Oginga; Chesnut, Steven Randall; Alejandro, Angela Ybarra; Young, Haeni Alecia

2016-01-01

This study was designed to add to the research on teachers' self-efficacy beliefs by examining preservice teachers' culturally responsive teaching self-efficacy doubts. We examined the tasks that preservice teachers felt least efficacious to successfully execute and explored the reasoning behind these self-efficacy doubts. Consequently, we were…

Historic Cosmology Identity and Exploration

Science.gov (United States)

Nebergall, K.

The role of the soul and spirit in the composition of human endeavour generally takes the form of motivational poster catch phrases or third-hand quotes. If the spirit equals the life of a creature, and one of the signs of life is locomotion, are humans not obliged by something even deeper than our humanity to explore the universe? This paper examines the roots and perspectives of our worldviews on identity, exploration, and the limitations and capacities of humanity. It will equip the reader to discuss the nature of exploration with audiences across a wide range of worldviews. Current cultures, regardless of religion or politics, are looped into a series of nihilistic patterns that must be broken by rediscovering our nature as living beings, and our obligations as human beings.

El Dominio de los Hemisferios Cerebrales

Directory of Open Access Journals (Sweden)

Romero-Urréa, Holguer

2010-08-01

Full Text Available The intellectual differences and the ski/Is between men and women have been the subject of severa/ controversies, which have even given origin to antagonist philosophical trainings in the historical happenings. We al/ know that the human brain without distinction of sex consist of two cerebral hemispheres, the /eft one with a specífic function and the right alike has a characteristicfunction, the difference started when it was determined that and man hada more develo­ ped cerebral hemisphere than the other and the woman has developed the opposite hemisphere to the man. Far severa[ millenniums, the woman has been, who has ruledfor its specia/ characteristics in her behaviour has dominated the world despite its so- called weaker sex. Has prevailed the knowledge that the domain of one of the two hemispheres is what determines the intellectual abilityfor the intuition has been given to the woman who holds the dominant brain, but severa/ studies show us that there is no dominant brain, each hemisphere plays a role , and the man's brain and woman are structurally similar. It will be checked that already have given lobotomies and the individua/'s existence is normal.

Exploration of barriers to breast-self examination among urban women in Shah Alam, Malaysia: a cross sectional study.

Science.gov (United States)

Al-Dubai, Sami Abdo Radman; Ganasegeran, Kurubaran; Alabsi, Aied M; Abdul Manaf, Mohd Rizal; Ijaz, Sharea; Kassim, Saba

2012-01-01

Breast cancer is the most common cancer among women in Malaysia. Barriers for practicing breast self examination (BSE) await exploration. To assess the practice of BSE and its correlated factors and particularly barriers amongst urban women in Malaysia. This cross-sectional study was conducted with 222 Malaysian women using a self-administered questionnaire. The mean (SD) age was 28.5 (±9.2) years, 59.0% were university graduates. Of the total, 81.1% were aware of breast cancer and 55% practiced BSE. Amongst 45% of respondents who did not practice BSE, 79.8% did not know how to do it, 60.6% feared being diagnosed with breast cancer, 59.6% were worried about detecting breast cancer, 22% reported that they should not touch their bodies, 44% and 28% reported BSE is embarrassing or unpleasant, 29% time consuming, 22% thought they would never have breast cancer or it is ineffective and finally 20% perceived BSE as unimportant. Logistic regression modeling showed that respondents aged ≥45 years, being Malay, married and having a high education level were more likely to practice BSE (pcultural, perception and environmental factors were identified as barriers. BSE practice was associated significantly with socio-demographic factors and socioeconomic status.

Why We Explore: The Value of Space Exploration for Future Generations

Science.gov (United States)

Cook, Stephen A.; Armstrong, Robert C., Jr.

2007-01-01

The National Aeronautics and Space Administration (NASA) and its industry partners are making measurable progress toward delivering new human space transportation capabilities to serve as the catalyst for a new era of discovery, as directed by the U.S. Vision for Space Exploration. In the interest of ensuring prolonged support, the Agency encourages space advocates of all stripes to accurately portray both the tangible and intangible benefits of space exploration, especially its value for future generations. This may be done not only by emphasizing the nation's return on its aerospace investment, but also by highlighting enabling security features and by promoting the scientific and technological benefits that accrue from the human exploration of space. As America embarks on a new era of leadership and international partnership on the next frontier, we are poised to master space by living off-planet on the Moon to prepare astronauts for longer journeys to Mars. These and other relevant facts should be clearly in the view of influential decision-makers and the American taxpayers, and we must increasingly involve those on whom the long-term sustainability of space exploration ultimately depends: America's youth. This paper will examine three areas of concrete benefits for future generations: fundamental security, economic enterprise, and high-technology advancements spurred by the innovation that scientific discovery demands.

Examining Factors Predicting Students' Digital Competence

Science.gov (United States)

Hatlevik, Ove Edvard; Guðmundsdóttir, Gréta Björk; Loi, Massimo

2015-01-01

The purpose of this study was to examine factors predicting lower secondary school students' digital competence and to explore differences between students when it comes to digital competence. Results from a digital competence test and survey in lower secondary school will be presented. It is important to learn more about and investigate what…

Bibliotherapy: "Literature as Exploration" Reconsidered

Science.gov (United States)

Justman, Stewart

2010-01-01

In this article, the author examines Louise Rosenblatt's "Literature as Exploration," a popular textbook used since 1938 (in five successive editions) in high school English classrooms across America. He discusses how the one-time college roommate of Margaret Mead managed to transform teaching literature into a form of student therapy that…

Results of the Lunar Exploration Analysis Group (LEAG) Gap Review: Specific Action Team (SAT), Examination of Strategic Knowledge Gaps (SKGs) for Human Exploration of the Moon

Science.gov (United States)

Shearer, C. K.; Eppler, D.; Farrell, W.; Gruener, J.; Lawrence, S.; Pellis, N.; Spudis, P. D.; Stopar, J.; Zeigler, R.; Neal, C;

Estimating strategic interactions in petroleum exploration

International Nuclear Information System (INIS)

Lin, C.-Y. Cynthia

2009-01-01

When individual petroleum-producing firms make their exploration decisions, information externalities and extraction externalities may lead them to interact strategically with their neighbors. If they do occur, strategic interactions in exploration would lead to a loss in both firm profit and government royalty revenue. Since these strategic interactions would be inefficient, changes in the government offshore leasing policy would need to be considered. The possibility of strategic interactions thus poses a concern to policy-makers and affects the optimal government policy. This paper examines whether these inefficient strategic interactions take place in U.S. federal lands in the Gulf of Mexico. In particular, it analyzes whether a firm's exploration decisions depend on the decisions of firms owning neighboring tracts of land. A discrete response model of a firm's exploration timing decision that uses variables based on the timing of a neighbor's lease term as instruments for the neighbor's decision is employed. The results suggest that strategic interactions do not actually take place, at least not in exploration, and therefore that the current parameters of the government offshore leasing policy do not lead to inefficient petroleum exploration. (author)

An Examination of Emerging Adulthood in Romanian College Students

Science.gov (United States)

Nelson, Larry J.

2009-01-01

Little work has been done to examine emerging adulthood in Eastern European countries such as Romania that are making the transition out of communism into the broader free-market economy of Western Europe. The purpose of this study was to (a) examine the criteria that college students in Romania have for adulthood, and (b) explore whether…

Exploring Touch Communication Between Coaches and Athletes ...

African Journals Online (AJOL)

Exploring Touch Communication Between Coaches and Athletes. ... Proceeding from a review of the literature on human touch communication to examine research on the power of touch to exchange relational ... AJOL African Journals Online.

Kamstrupp's Wow-Effect: Re-Examined and Expanded

Science.gov (United States)

King, Elizabeth M.; Dickmann, Ellyn M.; Johnson, Barbara Z.

2016-01-01

This review examines Anne Katrine Kamstrupp's article "The wow-effect in science teacher education; technology; sociomateriality." In the discussion below we explore three key areas of her ethnographic research. First, we reconsider Kamstrupp's article through the lens of technology as a pedagogical choice and philosophy. This is…

Young children's exploration of the indoor playroom space in center-based childcare

NARCIS (Netherlands)

van Liempd, Ine; Oudgenoeg-Paz, Ora; Fukkink, Ruben G.; Leseman, Paul

2018-01-01

Exploration plays a key role in the development of children. While exploring, children develop new skills by perceiving and acting upon the possibilities for action that are specified in the environment. This study examined the relations between young children's exploration during free play and the

REVIEW: EXPLORERS AND SCIENTISTS IN CHINA'S BORDERLANDS

OpenAIRE

Gregory Rohlf

2013-01-01

Review of: Denise M Glover, Stevan Harrel, Charles F McKhann, and Margaret Byrne Swain (eds). 2011. Explorers and Scientists in China's Borderlands, 1880-1950. Seattle: University of Washington Press. This collection of eight biographical essays from a 2007 symposium makes for engaging reading and holds together well as a book. The authors, mainly anthropologists, examine the lives of ten explorers who were active primarily in the first half of the twentieth century. Some worked for d...

Exploring Management Strategies to Reduce Cheating in Written Examinations: Case Study of Midlands State University

Science.gov (United States)

Taderera, Ever; Nyikahadzoi, Loveness; Matamande, Wilson; Mandimika, Elinah

2014-01-01

This study was concerned about cheating in written examinations at Midlands State University (MSU). The study revealed that both male and female students cheat in written examination; business studies students cheat more than other faculties, and younger (lower class) students cheat more than (upper class) older students. Factors influencing…

Impact Injury Caused by Linear Acceleration: Mechanisms, Prevention and Cost

Science.gov (United States)

1982-04-29

dejä decrites les blessures cerebrales, cräniennes ou cervicales . Les a tete seule, du cräne et du cerveau sont prelevees afin enomenes de masse...sujets pour lesquels le cerveau etait bien conserve et bien injecte. Ils sont au nombre de 20 en chocs frontaux et de 17 en chocs lateraux. Une

Exploring rater agreement: configurations of agreement and disagreement

Directory of Open Access Journals (Sweden)

ALEXANDER VON EYE

2006-03-01

Full Text Available At the level of manifest categorical variables, a large number of coefficients and models for the examination of rater agreement has been proposed and used for descriptive and explanatory purposes. This article focuses on exploring rater agreement. Configural Frequency Analysis (CFA is proposed as a method of exploration of cross-classifications of raters’ judgements. CFA allows researchers to (1 examine individual cells and sets of cells in agreement tables; (2 examine cells that indicate disagreement; and (3 explore agreement and disagreement among three or more raters. Four CFA base models are discussed. The first is the model of rater agreement that is also used for Cohen’s (1960  (kappa. This model proposes independence of raters’ judgements. Deviations from this model suggest agreement or disagreement beyond chance. The second CFA model is based on a log-linear null model. This model is also used for Brennan and Prediger’s (1981 n. It proposes a uniform distribution of ratings. The third model is that of Tanner and Young (1985. This model proposes equal weights for agreement cases and independence otherwise. The fourth model is the quasi-independence model. This model allows one to blank out agreement cells and thus to focus solely on patterns of disagreement. Examples use data from applicant selection.

Exploring Urban Screens

Directory of Open Access Journals (Sweden)

Zlatan Krajina

2009-12-01

Full Text Available There is a tautological tendency in the widespread claims that urban space is 'me-diated'. Never before has the citizen, it is argued, been confronted with such an unprecedented array of signage. I depart from the rhetoric of 'biggest-ever-saturation' as not necessarily untrue, but as insufficient in exploring the diverse spatial operations of urban screens. I examine some contemporary cases of ani-mated architectural surfaces, informational panels, and advertising billboards, with reference to much longer standing cultural practices of spatial management in modern cities, such as illumination, to suggest that the contemporary display media do not mediate the city anew but re-invent urban space as a field of ubiqui-tous mediation. From that standpoint I suggest exploring urban screens as a both singular visual agents and indivisible items in plural structural assemblages, b complementary forces of public illumination, and c complex perceptual platforms in visual play of scale and distance.

A Longitudinal Examination of Adolescent Career Planning and Exploration Using a Social Cognitive Career Theory Framework

Science.gov (United States)

Rogers, Mary E.; Creed, Peter A.

2011-01-01

This study used social cognitive career theory (Lent, Brown, & Hackett, 1994), as a framework to investigate predictors of career choice actions, operationalised as career planning and career exploration. The model was tested cross-sectionally and longitudinally with 631 high school students enrolled in Grades 10-12. Students completed measures of…

Author Details

African Journals Online (AJOL)

Touré, Kamadore. Vol 31, No 1 (2012) - Articles Infirmite motrice d'origine cerebrale : une serie Senegalaise Abstract PDF · Vol 32, No 2 (2013) - Articles Qualite de vie apres un accident vasculaire cerebral au Senegal: a propos de 50 cas. Abstract PDF · Vol 32, No 2 (2013) - Articles Selective attention of students suffering ...

Historical Analysis of the Inorganic Chemistry Curriculum Using ACS Examinations as Artifacts

Science.gov (United States)

Srinivasan, Shalini; Reisner, Barbara A.; Smith, Sheila R.; Stewart, Joanne L.; Johnson, Adam R.; Lin, Shirley; Marek, Keith A.; Nataro, Chip; Murphy, Kristen L.; Raker, Jeffrey R.

2018-01-01

ACS Examinations provide a lens through which to examine historical changes in topic coverage via analyses of course-specific examinations. This study is an extension of work completed previously by the ACS Exams Research Staff and collaborators in general chemistry, organic chemistry, and physical chemistry to explore content changes in the…

Managing Conflict: Examining Recent PLA Writings on Escalation Control

Science.gov (United States)

2016-02-01

Cleared for Public Release Managing Conflict: Examining Recent PLA Writings on Escalation Control Alison A. Kaufman, Daniel...ANSI Std. Z39.18 i Abstract This study examines how people in China’s People’s Liberation Army ( PLA ) think about and discuss...escalation control in their public writings. It draws on over two dozen PLA writings, most issued since 2008, to explore the current state of PLA

Viva Voce in Postgraduate Surgical Examinations in Anglophone West Africa

OpenAIRE

Bode, CO; UGWU, BT; DONKOR, P

2011-01-01

The Viva Voce is a form of assessment dating back to antiquity. It is widely used by the English-speaking West African Postgraduate Medical Colleges for intermediate and exit level examinations. Although it is still popular till the present day, there is a growing awareness of its limitation as an examination method. This paper explores the origin, format, advantages and limitations of oral examinations in postgraduate surgical assessment and proffers practical guidelines on its usage.

Viva voce in postgraduate surgical examinations in anglophone west Africa.

Science.gov (United States)

Bode, Co; Ugwu, Bt; Donkor, P

2011-01-01

The Viva Voce is a form of assessment dating back to antiquity. It is widely used by the English-speaking West African Postgraduate Medical Colleges for intermediate and exit level examinations. Although it is still popular till the present day, there is a growing awareness of its limitation as an examination method. This paper explores the origin, format, advantages and limitations of oral examinations in postgraduate surgical assessment and proffers practical guidelines on its usage.

International cooperation for Mars exploration and sample return

Science.gov (United States)

Levy, Eugene H.; Boynton, William V.; Cameron, A. G. W.; Carr, Michael H.; Kitchell, Jennifer H.; Mazur, Peter; Pace, Norman R.; Prinn, Ronald G.; Solomon, Sean C.; Wasserburg, Gerald J.

1990-01-01

The National Research Council's Space Studies Board has previously recommended that the next major phase of Mars exploration for the United States involve detailed in situ investigations of the surface of Mars and the return to earth for laboratory analysis of selected Martian surface samples. More recently, the European space science community has expressed general interest in the concept of cooperative Mars exploration and sample return. The USSR has now announced plans for a program of Mars exploration incorporating international cooperation. If the opportunity becomes available to participate in Mars exploration, interest is likely to emerge on the part of a number of other countries, such as Japan and Canada. The Space Studies Board's Committee on Cooperative Mars Exploration and Sample Return was asked by the National Aeronautics and Space Administration (NASA) to examine and report on the question of how Mars sample return missions might best be structured for effective implementation by NASA along with international partners. The committee examined alternatives ranging from scientific missions in which the United States would take a substantial lead, with international participation playing only an ancillary role, to missions in which international cooperation would be a basic part of the approach, with the international partners taking on comparably large mission responsibilities. On the basis of scientific strategies developed earlier by the Space Studies Board, the committee considered the scientific and technical basis of such collaboration and the most mutually beneficial arrangements for constructing successful cooperative missions, particularly with the USSR.

The effect of atomoxetine on random and directed exploration in humans.

Science.gov (United States)

Warren, Christopher M; Wilson, Robert C; van der Wee, Nic J; Giltay, Eric J; van Noorden, Martijn S; Cohen, Jonathan D; Nieuwenhuis, Sander

2017-01-01

The adaptive regulation of the trade-off between pursuing a known reward (exploitation) and sampling lesser-known options in search of something better (exploration) is critical for optimal performance. Theory and recent empirical work suggest that humans use at least two strategies for solving this dilemma: a directed strategy in which choices are explicitly biased toward information seeking, and a random strategy in which decision noise leads to exploration by chance. Here we examined the hypothesis that random exploration is governed by the neuromodulatory locus coeruleus-norepinephrine system. We administered atomoxetine, a norepinephrine transporter blocker that increases extracellular levels of norepinephrine throughout the cortex, to 22 healthy human participants in a double-blind crossover design. We examined the effect of treatment on performance in a gambling task designed to produce distinct measures of directed exploration and random exploration. In line with our hypothesis we found an effect of atomoxetine on random, but not directed exploration. However, contrary to expectation, atomoxetine reduced rather than increased random exploration. We offer three potential explanations of our findings, involving the non-linear relationship between tonic NE and cognitive performance, the interaction of atomoxetine with other neuromodulators, and the possibility that atomoxetine affected phasic norepinephrine activity more so than tonic norepinephrine activity.

Exploring Teachers' Curriculum Decision Making: Insights from History Education

Science.gov (United States)

Harris, Richard; Reynolds, Rosemary

2018-01-01

This paper explores teachers' decision making by examining the topics that 11 history teachers from 10 schools in England chose to teach and how they approached teaching these topics. Data were gathered from curriculum documents and semi-structured interviews in which teachers' topic choices and approaches to history were explored. Most teachers…

Research on geochemical exploration in geotherm development

International Nuclear Information System (INIS)

Hirowatari, Kazuo; Imaizumi, Yukio; Koga, Akito; Iwanaga, Tatsuto.

1987-01-01

The decisive factor of geotherm development is to improve the exploration techniques. By effectively carrying out the selection of promising development spots and the decision of well drilling positions, the geotherm development exceeding existing energy sources becomes feasible. There have been many problems in conventional geotherm exploration such as the high cost and long work period, therefore, it was decided to advance the research on geochemical exploration techniques which are relatively simple and can be carried out with low cost. When the techniques of geochemistry are used, for example, in the case that there are hot springs or fumaroles, the temperature, origin, properties and so on of underground hot water reservoirs can be estimated from their chemical composition. The method of examining the mercury concentration in soil and soil air has been in practical use in the geothermal districts where the ground surface symptom lacks. This time, the method of investigation using radon, thoron and gamma ray as the exploration indices was newly studied. The index compositions for geochemical exploration, new exploration index compositions, the method of measurement, the basic investigation and on-the-spot investigation are reported. (Kako, I.)

Cerro Prieto geothermal field: exploration during exploitation

Energy Technology Data Exchange (ETDEWEB)

1982-07-01

Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. The description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field are presented. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development.

Streptomyces Exploration: Competition, Volatile Communication and New Bacterial Behaviours.

Science.gov (United States)

Jones, Stephanie E; Elliot, Marie A

2017-07-01

Streptomyces bacteria are prolific producers of specialized metabolites, and have a well studied, complex life cycle. Recent work has revealed a new type of Streptomyces growth termed 'exploration' - so named for the ability of explorer cells to rapidly traverse solid surfaces. Streptomyces exploration is stimulated by fungal interactions, and is associated with the production of an alkaline volatile organic compound (VOC) capable of inducing exploration by other streptomycetes. Here, we examine Streptomyces exploration from the perspectives of interkingdom interactions, pH-induced morphological switches, and VOC-mediated communication. The phenotypic diversity that can be revealed through microbial interactions and VOC exposure is providing us with insight into novel modes of microbial development, and an opportunity to exploit VOCs to stimulate desired microbial behaviours. Copyright © 2017 Elsevier Ltd. All rights reserved.

Experience with the United Kingdom examinations in neurosurgery.

Science.gov (United States)

Pickard, J D

1997-01-01

The UK Intercollegiate Specialty Board examination in Surgical Neurology was established in 1991 based on the experience of the original Royal College of Surgeons of Edinburgh Assessment in Surgical Neurology, an exit examination that was originally opposed both by surgery in general and by the younger neurosurgical community. Criteria for eligibility encompass both UK, EC and non-EC overseas graduates. Candidates must have completed satisfactorily their 4th year of a 6 year training programme, have personal experience with the more straightforward benign tumours, aneurysms and posterior fossa explorations, and be able to safely manage a conventional neurosurgical practice. The examination consists of a multiple choice question paper, clinical examination and three Vivas. A curriculum is under construction. Examinations are held twice per annum, and rotate between the four colleges. There are strict guidelines for the examiners. The pass rate is about 70%. All aspects of the examination continue to evolve and are carefully audited.

The radiographic examination of the colon

International Nuclear Information System (INIS)

Hendrix, T.R.; Saba, G.P. II.

1980-01-01

To provide medical and scientific background on certain selected technologies generally considered to be of particular significance, the National Center for Health Care Technology commissioned a series of overview papers, one of which is entitled 'The Radiographic Examination of the Colon.' These overviews are likely to be of most immediate interest to clinicians and biomedical scientists; they also may provide valuable background for assessments undertaken by the Center and for exploring the broad societal implications of health care technologies. Barium enema is the most available and widely used technique for examining the colon. It is often a routine part of the gastrointestinal work-up regardless of the suspected basis, anatomical or functional, of the patient's symptoms. Indeed, common practice is not to entertain a diagnosis of functional disorder before excluding all reasonable possibility of an anatomical abnormality. Barium enema is one of the most frequently ordered radiographic examinations

Using Oral Examination as a Technique to Assess Student Understanding and Teaching Effectiveness

Science.gov (United States)

Roecker, Lee

2007-01-01

This paper discusses the use of oral examinations to assess student understanding in a general chemistry course and in an advanced inorganic chemistry course. Examination design, administration, and grading are explored, as well as the benefits to both instructors and students. Students react positively to the oral examination format and generally…

Un chichón en la cabeza (A Bump on the Head)

Centers for Disease Control (CDC) Podcasts

2011-02-15

En este podcast para chicos, los personajes de Kidtastics hablan de las conmociones cerebrales: su gravedad, los síntomas y lo que se debe hacer cuando se cree que uno puede tener una conmoción cerebral.  Created: 2/15/2011 by National Center for Injury Prevention and Control (NCIPC).   Date Released: 7/19/2011.

Low Cost Mars Surface Exploration: The Mars Tumbleweed

Science.gov (United States)

Antol, Jeffrey; Calhoun, Philip; Flick, John; Hajos, Gregory; Kolacinski, Richard; Minton, David; Owens, Rachel; Parker, Jennifer

2003-01-01

The "Mars Tumbleweed," a rover concept that would utilize surface winds for mobility, is being examined as a low cost complement to the current Mars exploration efforts. Tumbleweeds carrying microinstruments would be driven across the Martian landscape by wind, searching for areas of scientific interest. These rovers, relatively simple, inexpensive, and deployed in large numbers to maximize coverage of the Martian surface, would provide a broad scouting capability to identify specific sites for exploration by more complex rover and lander missions.

Near earth tracking/data exploration

Science.gov (United States)

Spearing, Robert

1990-01-01

The future challenges facing NASA's data acquisition program are examined, with emphasis on the near-earth exploration activity and the associated data systems. It is noted that the process that is being followed is an evolutionary one: new technologies are being gradually integrated into currently operating systems. For example, advanced handling is already being introduced into such programs as the Space Telescope and the Gamma Ray Source Observatory System.

Exploring pedagogical possibilities for transformative approaches to ...

African Journals Online (AJOL)

How can research on academic literacies throw light on the challenge to widen access to undergraduate science studies? This article explores what an academic literacies approach might mean in the context of undergraduate physics. The study examines the pedagogical practices and student learning in two ...

Innovating Everything: Examining Teacher Learning of Unfamiliar Texts

Science.gov (United States)

Goff, Maria Hernandez

2017-01-01

This dissertation explored how a teacher learned to teach with and about unfamiliar (to her) media texts in her high school English classroom. This study also examined my role as the researcher/mentor in the teacher's learning and development process. Through situated learning theories (Lave & Wenger, 1991) and discourse through identities…

Surinfection des contusions cerebrales par voie hematogene ...

African Journals Online (AJOL)

Eleven days after admission, right hemiparesis, aphasia appeared, in a febrile context (Ø 39.4). A control scan showed a left empyema associated with a right parietal abscess. Blood culture and bacteriological sampling of wound isolated a staphylococcus aureus. A triple antibiotic had allowed a favorable evolution.

MR imaging exploration of the pituitary region. Exploration IRM de l'axe hypothalamo-hypophysaire

Energy Technology Data Exchange (ETDEWEB)

Braun, M.; Roland, J. (Faculte de Medecine, 54 - Nancy (France)); Moret, C.; Picard, L. (Hopital Saint-Julien, 54 - Nancy (France))

1992-01-01

MR Imaging has become the procedure of choice for the exploration of the pituitary region. MR contrast resolution is far better than the finest CT examination, especially concerning the microadenomas and the neurohypophysis. The present paper concerns, at first the major principles of magnetic resonance imaging, its application for the study of the pituitary region including the use of contrast agent (Gadolinium). Lastly, MR anatomy and physiological variations are presented.

Coping with examinations: exploring relationships between students' coping strategies, implicit theories of ability, and perceived control.

Science.gov (United States)

Doron, Julie; Stephan, Yannick; Boiché, Julie; Le Scanff, Christine

2009-09-01

Relatively little is known about the contribution of students' beliefs regarding the nature of academic ability (i.e. their implicit theories) on strategies used to deal with examinations. This study applied Dweck's socio-cognitive model of achievement motivation to better understand how students cope with examinations. It was expected that students' implicit theories of academic ability would be related to their use of particular coping strategies to deal with exam-related stress. Additionally, it was predicted that perceived control over exams acts as a mediator between implicit theories of ability and coping. Four hundred and ten undergraduate students (263 males, 147 females), aged from 17 to 26 years old (M=19.73, SD=1.46) were volunteers for the present study. Students completed measures of coping, implicit theories of academic ability, and perception of control over academic examinations during regular classes in the first term of the university year. Multiple regression analyses revealed that incremental beliefs of ability significantly and positively predicted active coping, planning, venting of emotions, seeking social support for emotional and instrumental reasons, whereas entity beliefs positively predicted behavioural disengagement and negatively predicted active coping and acceptance. In addition, analyses revealed that entity beliefs of ability were related to coping strategies through students' perception of control over academic examinations. These results confirm that exam-related coping varies as a function of students' beliefs about the nature of academic ability and their perceptions of control when approaching examinations.

Low-latency Science Exploration of Planetary Bodies: a Demonstration Using ISS in Support of Mars Human Exploration

Science.gov (United States)

Thronson, Harley A.; Valinia, Azita; Bleacher, Jacob; Eigenbrode, Jennifer; Garvin, Jim; Petro, Noah

2014-01-01

We summarize a proposed experiment to use the International Space Station to formally examine the application and validation of low-latency telepresence for surface exploration from space as an alternative, precursor, or potentially as an adjunct to astronaut "boots on the ground." The approach is to develop and propose controlled experiments, which build upon previous field studies and which will assess the effects of different latencies (0 to 500 msec), task complexity, and alternate forms of feedback to the operator. These experiments serve as an example of a pathfinder for NASA's roadmap of missions to Mars with low-latency telerobotic exploration as a precursor to astronaut's landing on the surface to conduct geological tasks.

Human exploration mission studies

Science.gov (United States)

Cataldo, Robert L.

1989-01-01

The Office of Exploration has established a process whereby all NASA field centers and other NASA Headquarters offices participate in the formulation and analysis of a wide range of mission strategies. These strategies were manifested into specific scenarios or candidate case studies. The case studies provided a systematic approach into analyzing each mission element. First, each case study must address several major themes and rationale including: national pride and international prestige, advancement of scientific knowledge, a catalyst for technology, economic benefits, space enterprise, international cooperation, and education and excellence. Second, the set of candidate case studies are formulated to encompass the technology requirement limits in the life sciences, launch capabilities, space transfer, automation, and robotics in space operations, power, and propulsion. The first set of reference case studies identify three major strategies: human expeditions, science outposts, and evolutionary expansion. During the past year, four case studies were examined to explore these strategies. The expeditionary missions include the Human Expedition to Phobos and Human Expedition to Mars case studies. The Lunar Observatory and Lunar Outpost to Early Mars Evolution case studies examined the later two strategies. This set of case studies established the framework to perform detailed mission analysis and system engineering to define a host of concepts and requirements for various space systems and advanced technologies. The details of each mission are described and, specifically, the results affecting the advanced technologies required to accomplish each mission scenario are presented.

Exploring the Potential of a Wearable Camera to Examine the Early Obesogenic Home Environment: Comparison of SenseCam Images to the Home Environment Interview.

Science.gov (United States)

Schrempft, Stephanie; van Jaarsveld, Cornelia Hm; Fisher, Abigail

2017-10-12

The obesogenic home environment is usually examined via self-report, and objective measures are required. This study explored whether the wearable camera SenseCam can be used to examine the early obesogenic home environment and whether it is useful for validation of self-report measures. A total of 15 primary caregivers of young children (mean age of child 4 years) completed the Home Environment Interview (HEI). Around 12 days after the HEI, participants wore the SenseCam at home for 4 days. A semistructured interview assessed participants' experience of wearing the SenseCam. Intraclass correlation coefficients (ICCs), percent agreement, and kappa statistics were used as validity estimates for 54 home environment features. Wearing the SenseCam was generally acceptable to those who participated. The SenseCam captured all 54 HEI features but with varying detail; 36 features (67%) had satisfactory validity (ICC or kappa ≥0.40; percent agreement ≥80 where kappa could not be calculated). Validity was good or excellent (ICC or kappa ≥0.60) for fresh fruit and vegetable availability, fresh vegetable variety, display of food and drink (except sweet snacks), family meals, child eating lunch or dinner while watching TV, garden and play equipment, the number of TVs and DVD players, and media equipment in the child's bedroom. Validity was poor (ICC or kappa Internet Research (http://www.jmir.org), 12.10.2017.

An Exploration Perspective of Beamed Energy Propulsion

International Nuclear Information System (INIS)

Cole, John

2008-01-01

The Vision for Exploration is currently focused on flying the Space Shuttle safely to complete our Space Station obligations, retiring the Shuttle in 2010, then returning humans to the Moon and learning how to proceed to Mars and beyond. The NASA budget still includes funds for science and aeronautics but the primary focus is on human exploration. Fiscal constraints have led to pursuing exploration vehicles that use heritage hardware, particularly existing boosters and engines, with the minimum modifications necessary to satisfy mission requirements. So, pursuit of immature technologies is not currently affordable by NASA. Beamed energy is one example of an immature technology, from a human exploration perspective, that may eventually provide significant benefits for human exploration of space, but likely not in the near future. Looking to the more distant future, this paper will examine some of the criteria that must be achieved by beamed energy propulsion to eventually contribute to human exploration of the solar system. The analysis focuses on some of the implications of increasing the payload fraction of a launch vehicle, with a quick look at trans-lunar injection. As one would expect, there is potential for benefit, and there are concerns. The analysis concludes with an assessment of the Technology Readiness Level (TRL) for some beamed energy propulsion components, indicating that TRL 2 is close to being completed

Exploring the Eastern United States Continental Shelf with the NOAA Cooperative Institute for Ocean Exploration, Research, and Technology

Science.gov (United States)

Glickson, D.; Pomponi, S. A.

2016-02-01

The Cooperative Institute for Ocean Exploration, Research, and Technology (CIOERT) serves NOAA priorities in three theme areas: exploring the eastern U.S. continental shelf, improving the understanding of coral and sponge ecosystems, and developing advanced underwater technologies. CIOERT focuses on the exploration and research of ecosystems and habitats along frontier regions of the eastern U.S. continental shelf that are of economic, scientific, or cultural importance or of natural hazards concern. One particular focus is supporting ocean exploration and research through the use of advanced underwater technologies and techniques in order to improve the understanding of vulnerable deep and shallow coral and sponge ecosystems. CIOERT expands the scope and efficiency of exploration and research by developing, testing, and applying new and/or innovative uses of existing technologies to ocean exploration and research activities. In addition, CIOERT is dedicated to expanding ocean literacy and building NOAA's technical and scientific workforce through hands-on, at-sea experiences. A recent CIOERT cruise characterized Gulf of Mexico mesophotic and deepwater reef ecosystems off the west Florida shelf, targeting northern Pulley Ridge. This project created and ground-truthed new sonar maps made with an autonomous underwater vehicle; conducted video and photographic transects of benthic habitat and fish using a remotely operated vehicle; and examined the connectivity of fauna from shallow to deep reef ecosystems. CIOERT was established in 2009 by FAU-Harbor Branch Oceanographic Institute, with University of North Carolina, Wilmington, SRI International, and the University of Miami. The primary NOAA partner is the Office of Oceanic and Atmospheric Research's Office of Ocean Exploration and Research.

Exploring central governments' coordination of European Union affairs

DEFF Research Database (Denmark)

Jensen, Mads Christian Dagnis

2017-01-01

This study explores the coordination mechanisms managed by the central governments of the European Union (EU) in order to develop negotiation positions for their plenipotentiaries in the Council. Utilizing novel data from an expert survey, the first part examines the relationships within and betw...

Planetary Protection Issues in the Human Exploration of Mars

Science.gov (United States)

Criswell, Marvin E.; Race, M. S.; Rummel, J. D.; Baker, A.

2005-01-01

This workshop report, long delayed, is the first 21st century contribution to what will likely be a series of reports examining the effects of human exploration on the overall scientific study of Mars. The considerations of human-associated microbial contamination were last studied in a 1990 workshop ("Planetary Protection Issues and Future Mars Missions," NASA CP-10086, 1991), but the timing of that workshop allowed neither a careful examination of the full range of issues, nor an appreciation for the Mars that has been revealed by the Mars Global Surveyor and Mars Pathfinder missions. Future workshops will also have the advantage of Mars Odyssey, the Mars Exploration Rover missions, and ESA's Mars Express, but the Pingree Park workshop reported here had both the NCR's (1992) concern that "Missions carrying humans to Mars will contaminate the planet" and over a decade of careful study of human exploration objectives to guide them and to reconcile. A daunting challenge, and one that is not going to be simple (as the working title of this meeting, "When Ecologies Collide?" might suggest), it is clear that the planetary protection issues will have to be addressed to enable human explorers to safely and competently extend out knowledge about Mars, and its potential as a home for life whether martian or human.

Analysis of phakic before intraocular lens implantation for fundus examination

OpenAIRE

Juan Chen; Zhong-Ping Chen; Rui-Ling Zhu

2014-01-01

AIM:To investigate the findings of the eyes which were examined preoperatively by three mirror contact lens before the implantation of implantable collamer lens(ICL). To analysis the retinal pathological changes and to explore the clinical analysis of early diagnosis and treatment in retinopathy on fundus examination before operation. METHODS:The retrospective case series study included 127 eyes of 64 patients who underwent phakic intraocular lens implantation were received the fundus examina...

Does seen examination promote “deep” or “surface” learning? Pedagogical reflections on using seen examinations for student learning feedback

DEFF Research Database (Denmark)

Kofi Wireko, Joseph

2015-01-01

As part of a four year module at the Ghana Technology University College, mid semester examination was delivered by seen examination assessment method. The study explored Level 300 students’ experiences of “seen “examination” and the value it may add to their learning experience. It offered a novel...... and new innovation way in assessing students learning approach away from the traditional sit-in time constraint test, which may be used to complement the student assessment mechanism at the university. The themes generated during analysis were: preparing for exams, fear of exams, focus, and relevance...... tool that enhanced their knowledge and skills, encouraged deeper learning, reduced anxiety, generated and motivated high impact engagement of academic activities in the area of learning especially during preparations towards sit-in time constrained examinations...

Examination of Young Children's Gender-Doing and Gender-Bending in Their Play Dynamics: A Cross-Cultural Exploration

Science.gov (United States)

Hyun, Eunsook; Choi, Dong Haw

2004-01-01

The purpose of the study was to explore how young children express their perception of gender dynamics (e.g., gender-bending and gender-doing) in their play. A total of 84 children (52 boys and 32 girls) and 4 teachers from the U.S. and South Korea participated in the study. To capture perspectives from the children, qualitative data were…

A new generation videokymography for routine clinical vocal fold examination

NARCIS (Netherlands)

Qiu, Qingjun; Schutte, Harm K.

2006-01-01

Objective. This study aims to introduce a new-generation videokymographic system, which provides simultaneous laryngoscopic and kymographic image, for routine clinical vocal fold examination. Study Design: The authors explored a new imaging method for diagnosis and evaluation of voice disorders.

Trailblazing Medicine Sustaining Explorers During Interplanetary Missions

CERN Document Server

Seedhouse, Erik

2011-01-01

To prepare for the day when astronauts leave low-Earth orbit for long-duration exploration missions, space medicine experts must develop a thorough understanding of the effects of microgravity on the human body, as well as ways of mitigating them. To gain a complete understanding of the effects of space on the human body and to create tools and technologies required for successful exploration, space medicince will become an increasingly collaborative discipline incorporating the skills of physicians, biomedical scientists, engineers, and mission planners. Trailblazing Medicine examines the future of space medicine in relation to human space exploration; describes what is necessary to keep a crew alive in space, including the use of surgical robots, surface-based telemedicine, and remote emergency care; discusses bioethical problems such as euthanasia, sex, and precautionary surgery; investigates the medical challenges faced by interplanetary astronauts; details the process of human hibernation.

Geophysical Exploration. New site exploration method

Energy Technology Data Exchange (ETDEWEB)

Imai, Tsuneo; Otomo, Hideo; Sakayama, Toshihiko

1988-07-25

Geophysical exploration is used for geologic survey to serve purposes in civil engineering. New methods are being developed inside and outside Japan and are used to serve various purposes. This paper discusses recently developed techniques based on the measurement of seismic waves and electric potential. It also explains seismic tomography, radar tomography, and resistivity tomography which are included in the category of geotomography. At present, effort is being made to apply geophysical exploration technology to problems which were considered to be unsuitable for conventional exploration techniques. When such effort proceeds successfully, it is necessary to develop technology for presenting results quickly and exploration equipment which can work in various conditions. (10 figs, 15 refs)

An exploration of needs and preferences for dietary support in colorectal cancer survivors

NARCIS (Netherlands)

Hoedjes, Meeke; Kruif, De Anja; Mols, Floortje; Bours, Martijn; Beijer, Sandra; Winkels, Renate; Westerman, Marjan J.; Seidell, Jaap C.; Kampman, Ellen

2017-01-01

Purpose To describe the proportion of colorectal cancer (CRC) survivors who perceive a need for dietary support; to examine which socio-demographic, cancer-related, and health-related characteristics are associated with this need; to explore reasons for (not) needing support; and to explore CRC

AHP 28: Review: Explorers and Scientists in China's Borderlands

Directory of Open Access Journals (Sweden)

Gregory Rohlf

2013-12-01

Full Text Available This collection of eight biographical essays from a 2007 symposium makes for engaging reading and holds together well as a book. The authors, mainly anthropologists, examine the lives of ten explorers who were active primarily in the first half of the twentieth century. Some worked for decades in the Chinese borderlands. Several became quite well-known and influential figures during their lifetime and after, such as Joseph Rock, but it is likely that most of the explorers featured here will be new to readers. They were active primarily in Sichuan and Yunnan and were North Americans or Europeans with one exception, Ding Wenjiang, who is examined alongside the Swede, Johan Gunnar Andersson. All were men with the exception of Hedwig Weiss, a German who travelled with her diplomat husband, Fritz, in Sichuan and photographed the Yi people of Liangshan.

Exploring Servitization in China

DEFF Research Database (Denmark)

Raja, Jawwad Z.; Frandsen, Thomas

2017-01-01

Purpose: Previous research has predominately focused on the servitization strategies of Western manufacturers in advanced economies, neglecting the potential for servitization in those which are emerging, such as China. This paper explores the role of the external service partner network of a Eur......Purpose: Previous research has predominately focused on the servitization strategies of Western manufacturers in advanced economies, neglecting the potential for servitization in those which are emerging, such as China. This paper explores the role of the external service partner network...... of a European manufacturer providing services in China, in order to develop a better understanding of the resulting and associated challenges. Design/methodology/approach: An in-depth case study approach was used to examine the parent company, its subsidiary in China and the related service partner network....... Data collection involved all three actors and took place in Denmark and China. Findings: The findings suggest that motivation, opportunity and ability (MOA) need not only be mutually reinforcing for the organization attempting to move towards services but also aligned between organizational units...

Hydrocarbon exploration

Energy Technology Data Exchange (ETDEWEB)

Lerche, I. (South Carolina Univ., Columbia, SC (United States). Dept. of Geological Sciences)

1993-01-01

This special issue of the journal examines various aspects of the on-going search for hydrocarbons, ranging from frontier basins where little data are available, to more mature areas where considerable data are available. The incentives underlying the search for oil are roughly: the social, economic and industrial needs of a nation; the incentive of a corporation to be profitable; and the personal incentives of individuals in the oil industry and governments, which range from financial wealth to power and which are as diverse as the individuals who are involved. From a geopolitical perspective, the needs, requirements, goals, strategies, and philosophies of nations, and groups of nations, also impact on the oil exploration game. Strategies that have been employed have ranged from boycott to austerity and rationing, to physical intervention, to global ''flooding'' with oil by over-production. (author)

Exploring Mass Perception with Markov Chain Monte Carlo

Science.gov (United States)

Cohen, Andrew L.; Ross, Michael G.

2009-01-01

Several previous studies have examined the ability to judge the relative mass of objects in idealized collisions. With a newly developed technique of psychological Markov chain Monte Carlo sampling (A. N. Sanborn & T. L. Griffiths, 2008), this work explores participants; perceptions of different collision mass ratios. The results reveal…

Influence of Examinations Oriented Approaches on Quality Education in Primary Schools in Kenya

Science.gov (United States)

Mackatiani, Caleb Imbova

2017-01-01

This paper provides a critical appraisal of the influence of examinations oriented approaches on quality education in primary schools in Kenya. The purpose of the study was to determine effects of examination oriented teaching approaches on learning achievement among primary school pupils in Kakamega County, Kenya. It explored the assumptions…

A Cross-Cultural Examination of Typically Developing Children's Attitudes toward Individuals with Special Needs

Science.gov (United States)

Nikolaraizi, Magda; Kumar, Poonam; Favazza, Paddy; Sideridis, Georgios; Koulousiou, Dafni; Riall, Ann

2005-01-01

This study explores children's attitudes toward individuals with special needs in Greece and in the United States. A total of 196 kindergarten-age children participated in the study. Children's attitudes were examined using the "Acceptance Scale for Kindergartners-Revised" (ASK-R) and were further explored with the use of an open-ended…

Digital rectal examination and transrectal ultrasonography in staging of rectal cancer

DEFF Research Database (Denmark)

Rafaelsen, Søren Rafael; Kronborg, Ole; Fenger, Claus

1994-01-01

Staging of rectal carcinoma before surgical treatment was performed in a prospective blind study, comparing digital rectal exploration and transrectal linear ultrasonography (TRUS) with the resulting pathological examination. TRUS underestimated depth of penetration in 3 of 33 patients...... and overestimation resulted in 9 of 74. The figures for digital examination were 5 of 18 and 20 of 76, respectively. Penetration of the rectal wall was correctly identified in 56 of 61 patients by digital examination and in 59 of 61 by TRUS. Specimens without penetration of the rectal wall were identified in 26...

Exploration Review

Science.gov (United States)

Wilburn, D.R.; Stanley, K.A.

2013-01-01

This summary of international mineral exploration activities for 2012 draws upon information from industry sources, published literature and U.S. Geological Survey (USGS) specialists. The summary provides data on exploration budgets by region and mineral commodity, identifies significant mineral discoveries and areas of mineral exploration, discusses government programs affecting the mineral exploration industry and presents analyses of exploration activities performed by the mineral industry. Three sources of information are reported and analyzed in this annual review of international exploration for 2012: 1) budgetary statistics expressed in U.S. nominal dollars provided by SNL Metals Economics Group (MEG) of Halifax, Nova Scotia; 2) regional and site-specific exploration activities that took place in 2012 as compiled by the USGS and 3) regional events including economic, social and political conditions that affected exploration activities, which were derived from published sources and unpublished discussions with USGS and industry specialists.

Insights into Contextualised Learning: How Do Professional Examiners Construct Shared Understanding through Feedback?

Science.gov (United States)

Johnson, Martin

2014-01-01

This project uses the community of practice metaphor to explore some of the discursive characteristics of learning that take place when a group of United Kingdom-based professional examiners engage in joint-work activity in both face-to-face and remote computer-mediated communication contexts. Professional examiners are all subject experts, and…

A Post-Intentional Exploration of Agnostic College Students' Experiences

Science.gov (United States)

Armstrong, Amanda

2017-01-01

Scholars have adapted college student identity development models to examine and highlight the unique, laborious, and varied experiences of marginalized populations. However, researchers have minimally explored the perspectives of nontheistic and nonreligious college students using poststructural methodologies. I followed a post-intentional…

Statistical exploration of dataset examining key indicators influencing housing and urban infrastructure investments in megacities

Directory of Open Access Journals (Sweden)

Adedeji O. Afolabi

2018-06-01

Full Text Available Lagos, by the UN standards, has attained the megacity status, with the attendant challenges of living up to that titanic position; regrettably it struggles with its present stock of housing and infrastructural facilities to match its new status. Based on a survey of construction professionals’ perception residing within the state, a questionnaire instrument was used to gather the dataset. The statistical exploration contains dataset on the state of housing and urban infrastructural deficit, key indicators spurring the investment by government to upturn the deficit and improvement mechanisms to tackle the infrastructural dearth. Descriptive statistics and inferential statistics were used to present the dataset. The dataset when analyzed can be useful for policy makers, local and international governments, world funding bodies, researchers and infrastructural investors. Keywords: Construction, Housing, Megacities, Population, Urban infrastructures

Factors Influencing Student Preference When Comparing Handwriting and Typing for Essay Style Examinations

Science.gov (United States)

Mogey, Nora; Fluck, Andrew

2015-01-01

It seems anachronistic that we expect students to handwrite essay examinations when almost all their other work is mediated by computer. Two universities, one in the UK and one in Australia, are exploring the use of computers in free text response examinations. This paper compares both the attitudes and the behaviours of their students concerning…

High School Student Opinion Polling on Career Exploration

Science.gov (United States)

Whitten, Leah Suzanne

2011-01-01

This study examines the use of student learning polls as indicators of student perceptions and influences on career exploration. No Child Left Behind requires schools that fail to make adequate yearly progress for two consecutive years to develop continuous improvement plans. The concept of career preparation for students is included in these…

The Jackson Career Explorer: Two Further Validity Studies

Science.gov (United States)

Schermer, Julie Aitken

2012-01-01

The present report consists of two further validity studies using the Jackson Career Explorer (JCE), a short form and continuous version of the Jackson Vocational Interest Survey, measuring 34 interests. The first study examined the relationships between the JCE and five personality factors, from a sample of 528 individuals. The correlations found…

Autism in Angelman Syndrome: An Exploration of Comorbidity

Science.gov (United States)

Trillingsgaard, Anegen; Ostergaard, John R.

2004-01-01

The aim was to explore the comorbidity between Angelman syndrome and autism spectrum disorders (ASDs). Identification of autism in children with Angelman syndrome presents a diagnostic challenge. In the present study, 16 children with Angelman syndrome, all with a 15q11-13 deletion, were examined for ASDs. Thirteen children with Angelman syndrome…

Do general radiographic examinations resemble a person-centred environment?

International Nuclear Information System (INIS)

Hayre, C.M.; Blackman, S.; Eyden, A.

2016-01-01

Aim and objective: It is argued whether general radiographic examinations adhere to a person-centred approach within the direct digital radiography (DDR) environment. General radiographic examinations continue to increase and constitute approximately 90% of all examinations undertaken in the clinical environment. This study explored the potential impact patients experience whilst undergoing general imaging examinations. Method: An ethnographic methodology provided insight of two general radiography environments in the United Kingdom (UK) using participant observation and semi-structured interviews. Findings: The findings highlighted an ‘in and out’ culture whereby patients are ‘hurried’ and ‘rushed’ out of X-ray rooms in response to increasing time pressures experienced by diagnostic radiographers. In addition, this study challenged that patients may begin to rank ‘speed’ and ‘waiting times’ above other elements of radiographic care thus presenting new challenges for radiographers within the clinical environment. Conclusion: It is asserted that radiographers should remain holistic healthcare professionals and not begin to resemble operators on the production line. Further, it challenges whether patients are beginning to rank aspects of radiographic care within contemporary practices. Advances in knowledge: Few studies have explored the radiographer–patient relationship within the DDR environment, yet this study provides insight of person-centred practices within contemporary practices. - Highlights: • Challenges whether the use of DDR conforms to a person-centred approach. • Challenges whether radiographers are ‘treating patients as persons’ using DDR. • Patients may begin to rank ‘speed’ and ‘waiting times’ above other aspects of radiographic care.

A Framework for Examining Teachers' Noticing of Mathematical Cognitive Technologies

Science.gov (United States)

Smith, Ryan; Shin, Dongjo; Kim, Somin

2017-01-01

In this paper, we propose the mathematical cognitive technology noticing framework for examining how mathematics teachers evaluate, select, and modify mathematical cognitive technology to use in their classrooms. Our framework is based on studies of professional and curricular noticing and data collected in a study that explored how secondary…

Ergonomics-inspired Reshaping and Exploration of Collections of Models

KAUST Repository

Zheng, Youyi; Liu, Han; Dorsey, Julie; Mitra, Niloy J.

2015-01-01

This paper examines the following question: given a collection of man-made shapes, e.g., chairs, can we effectively explore and rank the shapes with respect to a given human body – in terms of how well a candidate shape fits the specified human body

Learning and Study Strategies Inventory subtests and factors as predictors of National Board of Chiropractic Examiners Part 1 examination performance.

Science.gov (United States)

Schutz, Christine M; Dalton, Leanne; Tepe, Rodger E

2013-01-01

This study was designed to extend research on the relationship between chiropractic students' learning and study strategies and national board examination performance. Sixty-nine first trimester chiropractic students self-administered the Learning and Study Strategies Inventory (LASSI). Linear trends tests (for continuous variables) and Mantel-Haenszel trend tests (for categorical variables) were utilized to determine if the 10 LASSI subtests and 3 factors predicted low, medium and high levels of National Board of Chiropractic Examiners (NBCE) Part 1 scores. Multiple regression was performed to predict overall mean NBCE examination scores using the 3 LASSI factors as predictor variables. Four LASSI subtests (Anxiety, Concentration, Selecting Main Ideas, Test Strategies) and one factor (Goal Orientation) were significantly associated with NBCE examination levels. One factor (Goal Orientation) was a significant predictor of overall mean NBCE examination performance. Learning and study strategies are predictive of NBCE Part 1 examination performance in chiropractic students. The current study found LASSI subtests Anxiety, Concentration, Selecting Main Ideas, and Test Strategies, and the Goal-Orientation factor to be significant predictors of NBCE scores. The LASSI may be useful to educators in preparing students for academic success. Further research is warranted to explore the effects of learning and study strategies training on GPA and NBCE performance.

Exploring Science Through Polar Exploration

Science.gov (United States)

Pfirman, S. L.; Bell, R. E.; Zadoff, L.; Kelsey, R.

2003-12-01

Exploring the Poles is a First Year Seminar course taught at Barnard College, Columbia University. First Year Seminars are required of incoming students and are designed to encourage critical analysis in a small class setting with focused discussion. The class links historical polar exploration with current research in order to: introduce non-scientists to the value of environmental science through polar literature; discuss issues related to venturing into the unknown that are of relevance to any discipline: self-reliance, leadership, preparation, decisions under uncertainty; show students the human face of science; change attitudes about science and scientists; use data to engage students in exploring/understanding the environment and help them learn to draw conclusions from data; integrate research and education. These goals are met by bringing analysis of early exploration efforts together with a modern understanding of the polar environment. To date to class has followed the efforts of Nansen in the Fram, Scott and Amundsen in their race to the pole, and Shackleton's Endurance. As students read turn-of-the-century expedition journals, expedition progress is progressively revealed on an interactive map showing the environmental context. To bring the exploration process to life, students are assigned to expedition teams for specific years and the fates of the student "expeditions" are based on their own decisions. For example, in the Arctic, they navigate coastal sea ice and become frozen into the ice north of Siberia, re-creating Nansen's polar drift. Fates of the teams varied tremendously: some safely emerged at Fram Strait in 4 years, while others nearly became hopelessly lost in the Beaufort Gyre. Students thus learn about variability in the current polar environment through first hand experience, enabling them to appreciate the experiences, decisions, and, in some cases, the luck, of polar explorers. Evaluation by the Columbia Center for New Media, Teaching

Mathematics education, democracy and development: Exploring connections

Directory of Open Access Journals (Sweden)

Renuka Vithal

2012-12-01

Full Text Available Mathematics education and its links to democracy and development are explored in this article, with specific reference to the case of South Africa. This is done by engaging four key questions. Firstly, the question of whether mathematics education can be a preparation for democracy and include a concern for development, is discussed by drawing on conceptual tools of critical mathematics education and allied areas in a development context. Secondly, the question of how mathematics education is distributed in society and participates in shaping educational possibilities in addressing its development needs and goals is used to examine the issues emerging from mathematics performance in international studies and the national Grade 12 examination; the latter is explored specifically in respect of the South African mathematics curriculum reforms and teacher education challenges. Thirdly, the question of whether a mathematics classroom can be a space for democratic living and learning that equally recognises the importance of issues of development in contexts like South Africa, as a post-conflict society still healing from its apartheid wounds, continuing inequality and poverty, is explored through pedagogies of conflict, dialogue and forgiveness. Finally the question of whether democracy and development can have anything to do with mathematics content matters, is discussed by appropriating, as a metaphor, South Africa’s Truth and Reconciliation Commission’s framework of multiple ‘truths’, to seek links within and across the various forms and movements in mathematics and mathematics education that have emerged in the past few decades.

Shangri-La revisited: an exploration of therapeutic efficacy among intentional communities.

Science.gov (United States)

Francis, T L

1992-04-01

Field and literature surveys were employed to explore the therapeutic efficacy of a reportedly common set of social structures found among some Intentional Communities (ICs). Substance misuse served as an example of social problems plausibly related to the examined social structures, which included: (1) meditative practices, (2) progressive education, (3) holistic health practices, (4) nutritional diet, (5) open policy making, (6) equally or equitably shared resources, (7) integrating membership processes, and (8) environmental concern. The field survey identified and examined 11 such ICs, and the literature exploration concerning the structures found that they appear to be therapeutic. Future research should focus on refining the study of structural and antecedent variables and on finding relationships between these variables to communities in the larger society.

Examining a model of dispositional mindfulness, body comparison, and body satisfaction

NARCIS (Netherlands)

Dijkstra, Pieternel; Barelds, Dick P. H.

The present study examined the links between dispositional mindfulness, body comparison, and body satisfaction. It was expected that mindfulness would be associated with less body comparison and more body satisfaction. Two models were tested: one exploring body comparison as a mediator between

Examining Student Perceptions of Flipping an Agricultural Teaching Methods Course

Science.gov (United States)

Conner, Nathan W.; Rubenstein, Eric D.; DiBenedetto, Cathy A.; Stripling, Christopher T.; Roberts, T. Grady; Stedman, Nicole L. P.

2014-01-01

To meet the needs of the 21st century student, college instructors have been challenged to transform their classrooms from passive to active, "minds-on" learning environments. This qualitative study examined an active learning approach known as a flipped classroom and sought to explore student perceptions of flipping a teaching methods…

Advanced Placement U.S. History: What Happens after the Examination?

Science.gov (United States)

Henry, Michael

1991-01-01

Discusses a survey of 56 advanced placement (AP) U.S. history teachers. Explores the scope of AP history and types of posttest activities used after Advanced Placement examinations. Concludes that public school courses developed more deeply into post-1960 events than the private schools did. Describes movies, debates, simulations, and local…

[Exploring a non-inflammatory clinical breast mass: Clinical practice guidelines].

Science.gov (United States)

Legendre, G; Guilhen, N; Nadeau, C; Brossard, A; Fauvet, R

2015-12-01

The aim of the study was to assess the diagnostic value of physical examination, radiologic explorations and percutaneous procedures of the breast in the exploration of a non-inflammatory palpable mass, in order to propose guidelines. A systematic literature review was conducted in the Medline and Cochrane library databases. International guidelines in French and English language were also consulted until April 30th 2015. Physical examination of a non-inflammatory palpable breast mass is not sufficient to eliminate a breast cancer (LE2). Mammography alone has a sensitivity between 70 and 95% for the diagnosis of breast cancer (LE3). Echography alone has a sensitivity of 98 to 100% for the diagnosis of breast cancer (LE2). The core needle biopsy has a better sensitivity and specificity than the fine-needle aspiration for breast cancer diagnosis (LE2). The association of mammography and 2D echography presents excellent sensitivity and negative predictive value (close to 100 %) to exclude a breast cancer (LE3). A double evaluation using mammography and echography is recommended in the exploration of a non-inflammatory palpable breast mass (grade B). Copyright © 2015 Elsevier Masson SAS. All rights reserved.

Qualitative Analysis of Mini Mental State Examination Pentagon in Vascular Dementia and Alzheimer's Disease: A Longitudinal Explorative Study.

Science.gov (United States)

Lo Buono, Viviana; Bonanno, Lilla; Corallo, Francesco; Foti, Maria; Palmeri, Rosanna; Angela, Marra; Di Lorenzo, Giuseppe; Todaro, Antonino; Bramanti, Placido; Bramanti, Alessia; Marino, Silvia

2018-06-01

Vascular dementia and Alzheimer's disease are the most diffuse forms of dementia. Sometimes, they are difficult to distinguish due to overlaps in symptomatology, pathophysiology, and comorbidity. Visual constructive apraxia is very common in dementia and impairment in these abilities can provide clinical information for differential diagnosis. All patients underwent Mini Mental State Examination (MMSE) at basal visit (T0) and after 1 year (T1). We analyzed differences in Qualitative Scoring Method for the Pentagon Copying Test and we explored the visual constructive apraxia evolution in these 2 types of dementia. In intragroup analysis, we found a significant difference in each group between T0 and T1 in MMSE score (P < .001) and total qualitative scores (P < .001). In intergroup analysis, at T0, we found significance difference in total qualitative scores (P < .001), in numbers of angles (P = .005), in distance/intersection (P < .001), in closure/opening (P = .01), in rotation (P < .001), and in closing-in (P < .001). At T1, we found significance difference in total qualitative scores (P < .001), in particular, in numbers of angles (P < .001), in distance/intersection (P < .001), in closure/opening (P < .001), in rotation (P < .001), and in closing-in (P < .001). The total score showed the highest classification accuracy (.90, 95%CI = .81-0.96) in differentiating patients with Alzheimer's disease from patients with vascular dementia. The optimal threshold value was k = 5. with .84 (95%CI = .69-0.93) sensitivity and .81 (95%CI = .64-0.93) specificity. Patients with vascular dementia showed more accuracy errors and graphic difficulties than patients with Alzheimer's disease. Qualitative analysis of copy provided a sensitive measure of visual constructive abilities in differentiating dementias, underlining a particularly vulnerability of visuoconstructive functions in vascular dementia compared

Estimation of genetic risk and detriment in radiological vascular examinations in Malaga (Spain)

International Nuclear Information System (INIS)

Ruiz Cruces, R.; Perez Martinez, M.; Fernandez Vazquez, M.I.; Diez de los Rios Delgado, A.

1997-01-01

The objective of the study is to estimate the population undergoing procedures of interventional vascular radiology. The values of genetically significant dose, somatically significant dose and damage are presented. The determinations refer to the population of Malaga and calculate the values of the dose-area product, dose in organs and effective doses. At first glance, these complex explorations seem to provide dose rates which are much higher than those for simple examinations. However, our values demonstrate the contrary. The numbers contrast with the values obtained from simple examinations by the population. Although the reasons are multifactorial, the root cause is the average age of the patients which undergo interventional vascular radiology: they are much older than patients who undergo simple explorations

Recreation and Agroforestry: Examining New Dimensions of Multifunctionality in Family Farms

Science.gov (United States)

Barbieri, Carla; Valdivia, Corinne

2010-01-01

Multifunctionality serves as an analytical framework to recognize many services that farms provide to their surrounding communities and society. This study explores an often overlooked dimension of multifunctionality by examining different recreational services provided by landowners in Missouri and analyzing the relationship between recreational…

The service quality-satisfaction link revisited : exploring asymetries and dynamics

NARCIS (Netherlands)

Falk, T.; Hammerschmidt, M.; Schepers, J.J.L.

2010-01-01

This study provides deeper insight in the link between service quality and customer satisfaction. The traditional assumption of a linear relationship is challenged by exploring asymmetries and dynamics. The simultaneous influence of service quality and customer experience on satisfaction is examined

Leadership in the Management Institutes: An Exploration of the ...

African Journals Online (AJOL)

Leadership in the Management Institutes: An Exploration of the Experiences of Women Directors. Rajib Lochan Dhar. Abstract. As leadership is a key component in meeting the challenges of educational institutes, this study was designed to examine the challenges faced by the female leaders of the management institutes ...

Trends in exploration and exploration equipment for uranium

International Nuclear Information System (INIS)

Raitz, C.H.

1976-01-01

Uranium exploration once again is in a ''boom'' cycle. The energy needs of the OPEC and non-OPEC countries alike have created a demand for uranium which appears certain to increase in future years. In turn, this demand has stimulated a dramatic rise in both the price of uranium and the exploration activity necessary to discover new reserves. One immediate reaction to the sudden increase in uranium exploration activity has been the evaluation of old exploration methods and equipment. This paper briefly reviews some of the traditional equipment and techniques which currently are being refined and updated. Undoubtedly this equipment, complemented with good exploration planning and judgment, will continue to be relied upon for many years and will lead to the discovery of many new deposits. The paper also covers in greater detail some of the newer, less conventional techniques and equipment now being introduced for uranium exploration. These new methods may be expected to keep this country in the forefront among the uranium producers of the world

Las carreras tecnicas: su importancia para el porvenir

OpenAIRE

Castillo Freire, Justo

2008-01-01

La Nanotecnología, la Ingeniería Genética, la Neurogénetica, la Biónica, devienen en prácticas tecnológicas encargadas de mantener y mejorar las cualidades intrínsecas del ser humano. La Mecacuántica, la Electrónica, la Informática, la Inteligencia Artificial, la Robótica, crean condiciones de apoyo al desempeño de funciones corporales y cerebrales.

Cerebro arte y creatividad

OpenAIRE

Brainsky, Simón; Guzmán Cervantes, Eugenia; Matallana, Diana; Montaña, Clemencia; Montañés, Patricia; Morales, Hernando; Moreno Cardozo, Belén del Rocío; Morillo, Anibal; Pardo, Rodrigo; Rojas, Alejandro; Ruiz, Edwin

2001-01-01

En el seminario Cerebro, Arte y Creatividad, realizado en mayo del 2000, en la Universidad Nacional, cuyas conferencias hemos integrado en este libro, hemos querido aproximamos a diversas manifestaciones del arte, diversas variedades de creatividad, desde la perspectiva de las funciones cerebrales y desde la perspectiva de los principios psicológicos que gobiernan la actividad creativa. Se explora cómo los hallazgos relativos al funcionamiento y especialización funcional de los hemisferi...

Examining Workplace Discrimination in a Discrimination-Free Environment

OpenAIRE

Braxton, Shawn Lamont

2010-01-01

Examining Workplace Discrimination in a Discrimination-Free Environment Shawn L. Braxton Abstract The purpose of this study is to explore how racial and gender discrimination is reproduced in concrete workplace settings even when anti-discrimination policies are present, and to understand the various reactions utilized by those who commonly experience it. I have selected a particular medical center, henceforth referred to by a pseudonym, â The Bliley Medical Centerâ as my case ...

Discourses of social justice: examining the ethics of democratic professionalism in nursing.

Science.gov (United States)

Thompson, Janice L

2014-01-01

This essay provides a critical exploration of discourses of social justice in nursing. It examines commitments to social justice in the work of international nursing scholars and in professional codes of ethics in international nursing organizations. The analysis touches on salient conversations in philosophy, relating these ways of knowing to social justice as an ethical pattern in nursing practice. On the basis of this analysis, the discussion explores questions of professional formation in nursing, noticing when commitments to social justice are taken up or evaded in different models of professionalism. In concluding comments, implications of democratic professionalism are explored for professional formation in nursing, arguing for teaching, learning, and knowledge projects that contribute to social justice in our democracy.

MR imaging exploration of the pituitary region

International Nuclear Information System (INIS)

Braun, M.; Roland, J.; Moret, C.; Picard, L.

1992-01-01

MR Imaging has become the procedure of choice for the exploration of the pituitary region. MR contrast resolution is far better than the finest CT examination, especially concerning the microadenomas and the neurohypophysis. The present paper concerns, at first the major principles of magnetic resonance imaging, its application for the study of the pituitary region including the use of contrast agent (Gadolinium). Lastly, MR anatomy and physiological variations are presented

Radiopharmaceuticals for cerebral studies; Radiofarmacos para Estudios Cerebrales

Energy Technology Data Exchange (ETDEWEB)

Leon Cabana, Alba [Universidad de la Republica, Facultad de Quimica (Uruguay)

1994-12-31

For obtain good brain scintillation images in nuclear medicine must be used several radiopharmaceuticals. Cerebral studies give a tumors visual image as well as brain anomalities detection and are helpful in the diagnostic diseases . Are described in this work: a cerebrum radiopharmaceuticals classification,labelled compounds proceeding and Tc 99m good properties in for your fast caption, post administration and blood purification for renal way.

Learning From Others and Spontaneous Exploration: A Cross-Cultural Investigation.

Science.gov (United States)

Shneidman, Laura; Gweon, Hyowon; Schulz, Laura E; Woodward, Amanda L

2016-05-01

How does early social experience affect children's inferences and exploration? Following prior work on children's reasoning in pedagogical contexts, this study examined U.S. children with less experience in formal schooling and Yucatec Mayan children whose early social input is predominantly observational. In Experiment 1, U.S. 2-year-olds (n = 77) showed more restricted exploration of a toy following a pedagogical demonstration than an interrupted, accidental, or no demonstration (baseline). In Experiment 2, Yucatec Mayan and U.S. 2-year-olds (n = 66) showed more restricted exploration following a pedagogical than an observational demonstration, while only Mayan children showed more restriction with age. These results suggest that although schooling is not a necessary precursor for sensitivity to pedagogy, early social experience may influence children's inferences and exploration in pedagogical contexts. © 2016 The Authors. Child Development © 2016 Society for Research in Child Development, Inc.

Exploration by radioactive fibrinogen of intrarenal coagulation phenomena. Preliminary results

International Nuclear Information System (INIS)

Simon, Jacques.

1974-01-01

The participation of fibrin deposits in kidney pathology was studied by the use of a radioactive tracer involved in the coagulation phenomenon: iodine 131-labelled fibrinogen. The isotopic exploration consists of a fibrinogen kinetics study combined with external counting over the kidney regions. The different stages of the procedure are described: separation, purification and labelling of fibrinogen; characteristics of the radioactive fibrinogen used; practical details of the examination itself; data analysis method. A chapter devoted to verifications and discussions of the procedure is followed by a report on the exploration of intrarenal coagulation phenomena in 30 kidney disease patients. In conclusion, the study of fibrinogen kinetics is considered as the most suitable method to detect local or slight intravascular coagulation phenomena. The sensitivity of the isotopic exploration is very satisfactory. The main criticism directed against this method is that the exploration is general and therefore blind [fr

Exploring Ancient Skies An Encyclopedic Survey of Archaeoastronomy

CERN Document Server

Kelley, David H

2005-01-01

Exploring Ancient Skies brings together the methods of archaeology and the insights of modern astronomy to explore the science of astronomy as it was practiced in various cultures prior to the invention of the telescope. The book reviews an enormous and growing body of literature on the cultures of the ancient Mediterranean, the Far East, and the New World (particularly Mesoamerica), putting the ancient astronomical materials into their archaeological and cultural contexts. The authors begin with an overview of the field and proceed to essential aspects of naked-eye astronomy, followed by an examination of specific cultures. The book concludes by taking into account the purposes of ancient astronomy: astrology, navigation, calendar regulation, and (not least) the understanding of our place and role in the universe. Skies are recreated to display critical events as they would have appeared to ancient observers - events such as the supernova of 1054, the 'lion horoscope' or the 'Star of Bethlehem.' Exploring An...

Liquid Hydrogen Sensor Considerations for Space Exploration

Science.gov (United States)

Moran, Matthew E.

2006-01-01

The on-orbit management of liquid hydrogen planned for the return to the moon will introduce new considerations not encountered in previous missions. This paper identifies critical liquid hydrogen sensing needs from the perspective of reliable on-orbit cryogenic fluid management, and contrasts the fundamental differences in fluid and thermodynamic behavior for ground-based versus on-orbit conditions. Opportunities for advanced sensor development and implementation are explored in the context of critical Exploration Architecture operations such as on-orbit storage, docking, and trans-lunar injection burn. Key sensing needs relative to these operations are also examined, including: liquid/vapor detection, thermodynamic condition monitoring, mass gauging, and leak detection. Finally, operational aspects of an integrated system health management approach are discussed to highlight the potential impact on mission success.

Examining the Role of Physical Appearance in Latino Adolescents' Ethnic Identity

Science.gov (United States)

Gonzales-Backen, Melinda A.; Umana-Taylor, Adriana J.

2011-01-01

Guided by ecological theory, the current study examined physical appearance as a moderator of the relation between familial ethnic socialization (FES) and ethnic identity among 167 Latino adolescents. Results indicated that FES was positively associated with ethnic identity exploration and resolution. Furthermore, as expected, physical appearance…

An Exploration of Boundaries and Solidarity in Counseling Relationships

Science.gov (United States)

Speight, Suzette L.

2012-01-01

This article explores the boundaries between clinicians and clients in light of the construct of solidarity. A universal conception of boundaries is critiqued and a culturally congruent view of boundaries is examined, rooted in the concept of solidarity. The article includes case illustrations of the connection between boundaries and solidarity…

Alliance Formation Motives in SMEs An Explorative Conjoint Analysis Study

NARCIS (Netherlands)

Van Gils, Anita; Zwart, Peter S.

Cooperative agreements are important tools to improve the competitive position of small and medium-sized firms.This explorative conjoint analysis study simultaneously examines the importance of firm, environmental and partner motives on the formation of two types of SME-alliances. In addition, we

Examining Trust, Forgiveness and Regret as Computational Concepts

Science.gov (United States)

Marsh, Stephen; Briggs, Pamela

The study of trust has advanced tremendously in recent years, to the extent that the goal of a more unified formalisation of the concept is becoming feasible. To that end, we have begun to examine the closely related concepts of regret and forgiveness and their relationship to trust and its siblings. The resultant formalisation allows computational tractability in, for instance, artificial agents. Moreover, regret and forgiveness, when allied to trust, are very powerful tools in the Ambient Intelligence (AmI) security area, especially where Human Computer Interaction and concrete human understanding are key. This paper introduces the concepts of regret and forgiveness, exploring them from social psychological as well as a computational viewpoint, and presents an extension to Marsh's original trust formalisation that takes them into account. It discusses and explores work in the AmI environment, and further potential applications.

Exploring education for digital librarians meaning, modes and models

CERN Document Server

Myburgh, Sue

2013-01-01

Exploring Education for Digital Librarians provides a refreshing perspective on the discipline and profession of Library and Information Science (LIS), with a focus on preparing students for careers as librarians who can deal with present and future digital information environments. A re-examination of the knowledge base of the field, combined with a proposed theoretical structure for LIS, provide the basis for this work, which also examines competencies for practice as well as some of the international changes in the nature of higher education. The authors finally suggest a model that could b

The Mediation Effects of Career Exploration on the Relationship between Trait Anxiety and Career Indecision

Science.gov (United States)

Park, Kira; Woo, Sungbum; Park, Kibok; Kyea, Jina; Yang, Eunjoo

2017-01-01

This study investigated trait anxiety, career exploration behaviors, and career indecision. Using longitudinal data, career exploration behavior was examined as a mediator in the relationship between trait anxiety and career indecision. Five hundred and one Korean college students completed online questionnaires at three different time points with…

Economics of petroleum exploration offshore Australia and Southeast Asia

International Nuclear Information System (INIS)

Allinson, G.; Elliston, M.

1994-01-01

The aim of this paper is to assess the economic attractiveness of exploring for crude oil offshore the North West Shelf of Australia by comparison with selected areas offshore Indonesia, Malaysia, Vietnam and the Philippines. In order to do this, the technical, quantifiable factors which affect offshore petroleum exploration acreage acquisition decisions at the country level are examined. These factors are historical prospectivity, costs of field development and fiscal regime. Other factors such as political, macro-economic and business risks are not considered. The paper concludes that there are significant differences between the countries as indicated by these measures. Past exploration in the Barrow/Dampier area of the North West Shelf of Australia has shown high levels of success by comparison with the other countries. It is estimated that this relatively high success rate coupled with comparatively low costs of field development and lenient fiscal regimes makes the economics of exploration on the North West Shelf favourable by comparison with those selected areas in the other countries considered. 5 tabs., 4 figs

The Enduring Value of the Physical Examination.

Science.gov (United States)

Zaman, Junaid A B

2018-05-01

This article focuses exclusively on physical examination (PE) in the context of clinical medicine, that is, the interaction between a health care provider and patient. In essence, there is not only benefit (value) to PE but also that it will last (endure) for some time. Both "enduring" and "value" are explored in more depth with respect to the future integration of PE into the clinical assessment of a patient and how its value extends well beyond current diagnostic/cost-based metrics. Crown Copyright © 2017. Published by Elsevier Inc. All rights reserved.

Using item response theory to explore the psychometric properties of extended matching questions examination in undergraduate medical education

Directory of Open Access Journals (Sweden)

Lawton Gemma

2005-03-01

Full Text Available Abstract Background As assessment has been shown to direct learning, it is critical that the examinations developed to test clinical competence in medical undergraduates are valid and reliable. The use of extended matching questions (EMQ has been advocated to overcome some of the criticisms of using multiple-choice questions to test factual and applied knowledge. Methods We analysed the results from the Extended Matching Questions Examination taken by 4th year undergraduate medical students in the academic year 2001 to 2002. Rasch analysis was used to examine whether the set of questions used in the examination mapped on to a unidimensional scale, the degree of difficulty of questions within and between the various medical and surgical specialties and the pattern of responses within individual questions to assess the impact of the distractor options. Results Analysis of a subset of items and of the full examination demonstrated internal construct validity and the absence of bias on the majority of questions. Three main patterns of response selection were identified. Conclusion Modern psychometric methods based upon the work of Rasch provide a useful approach to the calibration and analysis of EMQ undergraduate medical assessments. The approach allows for a formal test of the unidimensionality of the questions and thus the validity of the summed score. Given the metric calibration which follows fit to the model, it also allows for the establishment of items banks to facilitate continuity and equity in exam standards.

Critical incidents: exploring theory policy and practice

OpenAIRE

Beeke, Matthew A.

2011-01-01

Responding to critical incidents in school communities has become an established part of the practice of educational psychologists (EPs). Despite this the EP professional journal literature is sparse, the last major study being conducted by Houghton in 1996. Within a mixed methods design this study aimed to explore various aspects of EP practice in response to critical incidents. Firstly, critical incident policy and EP journal literature was examined to provide a definition...

The science and art of simulation I exploring, understanding, knowing

CERN Document Server

Kaminski, Andreas; Gehring, Petra

2017-01-01

The new book series “The Science and Art of Simulation” (SAS) addresses computer simulations as a scientific activity and engineering artistry (in the sense of a technē). The first volume is devoted to three topics: 1. The Art of Exploring Computer Simulations Philosophy began devoting attention to computer simulations at a relatively early stage. Since then, the unquestioned point of view has been that computer simulation is a new scientific method; the philosophy of simulation is therefore part of the philosophy of science. The first section of this volume discusses this implicit, unchallenged assumption by addressing, from different perspectives, the question of how to explore (and how not to explore) research on computer simulations. Scientists discuss what is still lacking or considered problematic, while philosophers draft new directions for research, and both examine the art of exploring computer simulations. 2. The Art of Understanding Computer Simulations The results of computer simulations are ...

Bile Duct Exploration

Science.gov (United States)

... Home / Health Library / Diagnostics & Testing / Bile Duct Exploration Bile Duct Exploration Common bile duct exploration is a ... Test Details Results and Follow-Up What is bile, and what is bile duct exploration? Bile is ...

Repository exploration

International Nuclear Information System (INIS)

Pentz, D.L.

1984-01-01

This paper discusses exploration objectives and requirements for a nuclear repository in the U.S.A. The importance of designing the exploration program to meet the system performance objectives is emphasized and some examples of the extent of exploration required before the License Application for Construction Authorization is granted are also discussed

Alternative pricing regimes in Ontario : exploring the impacts

International Nuclear Information System (INIS)

Rowlands, I.H.

2006-01-01

Legislative goals were recently established in Ontario to promote reliability and quality of electricity service and to ensure that distribution rates for customers remain reasonable. This presentation explored the effect of changing electricity pricing structures on residential customers in Ontario. This study investigated a period between May to December 2005, in the town of Milton, Ontario. Monthly demand was measured for each month, and monthly weighted averages were presented. Residents with electric heating were removed from the sample. Four pricing structure scenarios were examined: (1) flat rates; (2) time-of-use pricing regimes; (3) real time pricing regimes; and (4) critical peak pricing. Average monthly consumption rates for July and August for all 4 scenarios were presented. Results for time-of-use were compared to flat rates, which showed a slight increase in monthly costs. Real time average monthly electricity costs were significantly higher. Time-of-use costs increased by 57 per cent during the periods examined. Real time pricing regimes resulted in a 196 per cent rise in costs. It was concluded that more research must be done to explore the policy implications of pricing regimes and their effect on consumer behaviour. refs., tabs., figs

Multi-data integration of exploration criteria and selection of prospecting targets

International Nuclear Information System (INIS)

Dechang, L.; Jingke, Z.; Maorong, S.; Guojuan, W.

1991-01-01

In this paper based on the analysis of the exploration criteria for Shengyuan Basin-a uranium ore field, the multi-data integration and information extraction of exploration criteria are carried out on computer and image processing system so that the areas with best combinations of exploration criteria are directly displayed on the screen. Six prospecting targets are selected through the field examination. Shengyuan basin in Jiangxi province is a uranium-producing, Jurassic Cretaceous volcanic-sedimentary basin with an area of about 400 sq km. Its basement consists of Sinian-Cambrian rocks with Caledonian granites intruded. Several uranium deposits, occurrences and anomalies were discovered over the basin region which, therefore, becomes a very important uranium ore field in China

Discriminant analysis of Social Work’s performance in licensure examination

Directory of Open Access Journals (Sweden)

Jonel R. Alonzo

2017-12-01

Full Text Available Many research studies have examined academic factors as predictors of success in licensure examination. The purpose of this descriptive discriminant analysis was to explore possible factors in passing social work licensure examination. Data were examined from academic records of 69 (37 passed and 32 failed Social Work graduates of the University of Mindanao who took Social Work Licensure Examination 2014. This can be used as a basis of Social Work program in planning and administering strategies to improve its national passing rates. Discriminant analysis was employed along five academic factors which are Human Behavior and Social Environment (HBSE, Social Work Programs and Policies (SWPP, Social Work Methods (SWM, Field Practice (FP and Grade Point Average (GPA. The analysis generated three significant predictors accounting for 76.22% of between group variability. The function had a hit ratio of 100%. Structure matrix revealed that three cluster subjects were identified as good factors of passing the social work licensure examination: HBSE, SWPP and SWM had a correlation value of 0.713, 0.768 and 0.840, respectively.

Guilty in Whose Eyes? Student-Teachers' Perspectives on Cheating on Examinations

Science.gov (United States)

Amua-Sekyi, Ekua Tekyiwa

2016-01-01

The study explored student-teachers' views on cheating during examinations. A mixed method approach which involved a survey and focus group interviews was employed. Nine hundred undergraduate education students from a public university and three colleges of education in Ghana were surveyed. Focus group interviews were held with six students from…

Sexual Assault Nurse Examiners' Perceptions of the Revictimization of Rape Victims

Science.gov (United States)

Maier, Shana L.

2012-01-01

While Sexual Assault Nurse Examiner programs have improved the treatment of rape victims by offering more compassionate and thorough treatment, SANEs believe victims continue to face revictimization by the medical, criminal justice and legal systems. The purpose of this research is to explore SANEs' perceptions of the revictimization of rape…

Social Cognitive Career Theory and Middle School Student Career Exploration

Science.gov (United States)

Sickinger, Pamela H.

2013-01-01

Within the framework of social cognitive career theory, social cognitive career variables, demographic variables, and the contextual variable, parent support, were examined to determine their predictive value for eighth-grade students' career exploration behavior. Results suggest that the social cognitive career variable, intentions/goals,…

Information source exploitation/exploration and NPD decision-making

DEFF Research Database (Denmark)

Jespersen, Kristina Risom

different Scandinavian companies. Data was analyzed using hierarchical regression models across decision criteria dimensions and NPD stages as well as analyzing the combination of selected information sources. Rather than forwarding one optimal search behavior for the entire NPD process, we find optimal...... information search behavior at either end of the exploitation/exploration continuum. Additionally, we find that overexploitation and overexploration is caused by managerial bias. This creates managerial misbehavior at gate decision-points of the NPD process.......The purpose of this study is to examine how the exploration/exploitation continuum is applied by decision-makers in new product gate decision-making. Specifically, we analyze at gate decision-points how the evaluation of a new product project is affected by the information source exploitation...

Exploring IT roles in business process innovation

DEFF Research Database (Denmark)

Gong, Jie; Møller, Charles

2013-01-01

This paper explores the relationships between IT and Business process innovation (BPI) through examining IT roles in the processes of BPI. BPI is an innovative activity in business which has been paying more attention in recent years. However it is often confused with other process......-orientation concepts, such as Business process management (BPM) and Business process reengineering (BPR). The paper aims to find out two research questions: 1) How do we understand the meanings of BPI in the current background of economic globalization? 2) What IT roles are in the process of BPI? Based on finding...... the answer to these two questions, the definition of BPI in academia and the relationships with other popular process-orientation activities in practice are reviewed, then a framework of comprehensive understanding of BPI is put forward, and thereafter the interactions between IT and BPI are explored...

[Career exploration as related to self-efficacy and the motivation based on self-determination theory].

Science.gov (United States)

Yoshizaki, Satoko; Hiraoka, Kyoichi

2015-04-01

The purpose of the present study was to examine the multivariate relations between career exploration and its predictors. University sophomores and seniors completed a questionnaire about career exploration, career decision-making self-efficacy, career decision-making outcome expectations, and career motivation. Canonical correlation analysis showed that combining all predictors, i.e., career decision-making self-efficacy, career decision-making outcome expectations, and career motivations, accounted for a large portion of the career exploration variance. Of subfactors of career motivation, only "integrated and identified regulation" was significantly related to career exploration. This result suggests that career exploration is predicted by self-efficacy as well as a highly self-determinated extrinsic motivation.

Psicobiología de la homosexualidad masculina: hallazgos recientes

OpenAIRE

ANNICCHIARICO, IVÁN

2009-01-01

En esta revisión se examinan reportes empíricos y teóricos que indagan sobre las causas de la homosexualidad masculina. Con base en ellos se establece que la homosexualidad masculina difiere de la femenina en algunos aspectos. Adicionalmente, se muestra evidencia suficiente para considerar la homosexualidad masculina como una condición biológica: existen diferencias cerebrales entre hombres gais y hombres heterosexuales, factores genéticos y prenatales asociados con la homosexualidad, diferen...

Exploration

International Nuclear Information System (INIS)

Lohrenz, J.

1992-01-01

Oil and gas exploration is a unique kind of business. Businesses providing a vast and ever-changing panoply of products to markets are a focus of several disciplines' energetic study and analysis. The product inventory problem is robust, pertinent, and meaningful, and it merits the voluminous and protracted attention received from keen business practitioners. Prototypical business practitioners, be they trained by years of business hurly-burly, or sophisticated MBAs with arrays of mathematical algorithms and computers, are not normally prepared, however, to recognize the unique nature of exploration's inventories. Put together such a business practitioner with an explorationist and misunderstandings, hidden and open, are inevitable and predictably rife. The first purpose of this paper is to articulate the inherited inventory handling paradigms of business practitioners in relation to exploration's inventories. To do so, standard pedagogy in business administration is used and a case study of an exploration venture is presented. A second purpose is to show the burdens that the misunderstandings create. The result is not just business plans that go awry, but public policies that have effects opposite from those intended

Robotics and automation in Mars exploration

Science.gov (United States)

Bourke, Roger D.; Sturms, Francis M., Jr.; Golombek, Matthew P.; Gamber, R. T.

1992-01-01

A new approach to the exploration of Mars is examined which relies on the use of smaller and simpler vehicles. The new strategy involves the following principles: limiting science objectives to retrieval of rock samples from several different but geologically homogeneous areas; making use of emerging microspacecraft technologies to significantly reduce the mass of hardware elements; simplifying missions to the absolutely essential elements; and managing risk through the employment of many identical independent pieces some of which may fail. The emerging technologies and their applications to robotic Mars missions are discussed.

Professional Development for International Teachers: Examining TPACK and Technology Integration Decision Making

Science.gov (United States)

Dalal, Medha; Archambault, Leanna; Shelton, Catharyn

2017-01-01

This mixed-methods study explored the impacts of a semester-long technology professional development for secondary school international teachers from developing nations around the world. We used (a) a survey approach to examine international teachers' perceived technology integration abilities using the technological pedagogical content knowledge…

Asteroid exploration and utilization: The Hawking explorer

Science.gov (United States)

Carlson, Alan; Date, Medha; Duarte, Manny; Erian, Neil; Gafka, George; Kappler, Peter; Patano, Scott; Perez, Martin; Ponce, Edgar; Radovich, Brian

1991-01-01

The Earth is nearing depletion of its natural resources at a time when human beings are rapidly expanding the frontiers of space. The resources which may exist on asteroids could have enormous potential for aiding and enhancing human space exploration as well as life on Earth. With the possibly limitless opportunities that exist, it is clear that asteroids are the next step for human existence in space. This report comprises the efforts of NEW WORLDS, Inc. to develop a comprehensive design for an asteroid exploration/sample return mission. This mission is a precursor to proof-of-concept missions that will investigate the validity of mining and materials processing on an asteroid. Project STONER (Systematic Transfer of Near Earth Resources) is based on two utilization scenarios: (1) moving an asteroid to an advantageous location for use by Earth; and (2) mining an asteroids and transporting raw materials back to Earth. The asteroid explorer/sample return mission is designed in the context of both scenarios and is the first phase of a long range plane for humans to utilize asteroid resources. The report concentrates specifically on the selection of the most promising asteroids for exploration and the development of an exploration scenario. Future utilization as well as subsystem requirements of an asteroid sample return probe are also addressed.

"@Work in Cyberspace": Exploring Practitioner Use of the PRForum.

Science.gov (United States)

Thomsen, Steven R.

1996-01-01

Explores the impact of PRForum, an Internet newsgroup, on the public relations community by examining the nature, function, and content of online exchanges. Finds that PRForum is used for three functions: to facilitate the exchange of information; to create a forum for debate on issues; and to cultivate a sense of self-validation on personal and…

The hippocampus and exploration: dynamically evolving behavior and neural representations

Science.gov (United States)

Johnson, Adam; Varberg, Zachary; Benhardus, James; Maahs, Anthony; Schrater, Paul

2012-01-01

We develop a normative statistical approach to exploratory behavior called information foraging. Information foraging highlights the specific processes that contribute to active, rather than passive, exploration and learning. We hypothesize that the hippocampus plays a critical role in active exploration through directed information foraging by supporting a set of processes that allow an individual to determine where to sample. By examining these processes, we show how information directed information foraging provides a formal theoretical explanation for the common hippocampal substrates of constructive memory, vicarious trial and error behavior, schema-based facilitation of memory performance, and memory consolidation. PMID:22848196

The hippocampus and exploration: dynamically evolving behavior and neural representations

Directory of Open Access Journals (Sweden)

Adam eJohnson

2012-07-01

Full Text Available We develop a normative statistical approach to exploratory behavior called information foraging. Information foraging highlights the specific processes that contribute to active, rather than passive, exploration and learning. We hypothesize that the hippocampus plays a critical role in active exploration through directed information foraging by supporting a set of processes that allow an individual to determine where to sample. By examining these processes, we show how information directed information foraging provides a formal theoretical explanation for the common hippocampal substrates of constructive memory, vicarious trial and error behavior, schema-based facilitation of memory performance, and memory consolidation.

Three Planes of Practice: Examining Intersections of Reading Identity and Pedagogy

Science.gov (United States)

Bernstein, Malayna

2014-01-01

This paper reports on a project that examined teachers' reading identities and explored ways in which those identities were manifested in reading pedagogy and were adopted by students. The paper focuses on one purposively selected teacher and his class. Tom Ziegler's personal and pedagogical practices were deeply aligned, and his…

Employees as Customers: Exploring Service Climate, Employee Patronage, and Turnover

Science.gov (United States)

Abston, Kristie A.; Kupritz, Virginia W.

2011-01-01

The role of retail employees as customers was explored by quantitatively examining the influence of service climate and employee patronage on employee turnover intentions. Employees representing all shifts in two stores of a national retailer participated. Results indicated that employee patronage partially mediates the effects of service climate…

Solving the Examination Timetabling Problem in GPUs

Directory of Open Access Journals (Sweden)

Vasileios Kolonias

2014-07-01

Full Text Available The examination timetabling problem belongs to the class of combinatorial optimization problems and is of great importance for every University. In this paper, a hybrid evolutionary algorithm running on a GPU is employed to solve the examination timetabling problem. The hybrid evolutionary algorithm proposed has a genetic algorithm component and a greedy steepest descent component. The GPU computational capabilities allow the use of very large population sizes, leading to a more thorough exploration of the problem solution space. The GPU implementation, depending on the size of the problem, is up to twenty six times faster than the identical single-threaded CPU implementation of the algorithm. The algorithm is evaluated with the well known Toronto datasets and compares well with the best results found in the bibliography. Moreover, the selection of the encoding of the chromosomes and the tournament selection size as the population grows are examined and optimized. The compressed sparse row format is used for the conflict matrix and was proven essential to the process, since most of the datasets have a small conflict density, which translates into an extremely sparse matrix.

Passing the NBCOT Examination: Preadmission, Academic, and Fieldwork Factors

Directory of Open Access Journals (Sweden)

Sharon D. Novalis

2017-10-01

Full Text Available All occupational therapy students are required to successfully complete the certification examination administered by the National Board for Certification in Occupational Therapy (NBCOT before they can practice independently. The need to repeat the examination can result in stress, anxiety, and financial hardship. This paper explores the relationship of preadmission factors, academic and fieldwork performance, and demographic variables to successful first-time attempts on the certification examination for occupational therapists. Data were gathered from 144 student files in a Master of Occupational Therapy (MOT Program at a single university. Of the sample, 82% passed and 18% failed their first NBCOT test trial. Considered independently, preadmission recommendation letters and writing sample scores, graduate MOT program GPA, lack of MOT program difficulty, fieldwork self-reports, and gender predicted NBCOT certification examination outcomes. When considered together in logistic regression models predicting outcome, this combination of factors correctly predicted 86.2% of student outcomes (or 20% to 32% of the variance in certification examination success, with OT program GPA and preadmission recommendation scores predicting unique outcome variance. This information may be helpful to admissions committees as well as to occupational therapy faculty as they identify strategies and practices to facilitate first-time test taking success on the NBCOT certification examination

Adherence to RIASEC Structure in Relation to Career Exploration and Parenting Style: Longitudinal and Idiothetic Considerations

Science.gov (United States)

Tracey, Terence J. G.; Lent, Robert W.; Brown, Steven D.; Soresi, Salvatore; Nota, Laura

2006-01-01

We explored the ''idiothetic'' cognitive structure of RIASEC occupational percepts in a sample of Italian middle and high school students over a one year period, examining the possible bidirectional linkages between cognitive-vocational structure, involvement in career exploration activities, and exposure to authoritative parenting style. The…

Competition for petroleum exploration capital in the Asia-Pacific region - implications for New Zealand and Australia

International Nuclear Information System (INIS)

Miller, A.

1995-01-01

This paper examines the future energy production and demand profiles for the Asia Pacific region and the global allocation of exploration capital made by major international petroleum companies. The implications of these factors for future government petroleum exploration policies within the region are considered, in particular the Australian and New Zealand situations, together with likely effects of such measures on the ability of exploration and production companies to raise capital. (Author)

On the economic dimensions of CSR: Exploring Fortune Global 250 reports

NARCIS (Netherlands)

Fortanier, F.N.; Kolk, A.

2007-01-01

The macro-level debate on the economic impact of multinational enterprises (MNEs) is still unsettled. This article explores micro-level evidence by examining what Fortune Global 250 firms themselves report about their economic impact. Such reporting embodies corporate attempts to account for their

Mental capacity to consent to treatment in anorexia nervosa : explorative study

NARCIS (Netherlands)

Elzakkers, Isis F F M; Danner, Unna N; Hoek, Hans W; van Elburg, Annemarie A

2016-01-01

BACKGROUND: Mental capacity to consent to treatment in anorexia nervosa is a neglected area in clinical decision-making. AIMS: To examine clinical and neuropsychological parameters associated with diminished mental capacity in anorexia nervosa. METHOD: An explorative study was conducted in 70 adult

Running, Being, and Beijing—An Existential Exploration of a Runner Identity

DEFF Research Database (Denmark)

Ronkainen, Noora; Harrison, Marlen Elliot; Ryba, Tatiana

2014-01-01

In this research, we explore the negotiation of a conflicted runner identity in a Finnish runner's short-term migration to Beijing, China. We examine the historical and cultural construction of the runner identity and discuss the current discourses that constitute the modern runner subjectivities...... and migration studies as well as practical considerations for the use of autoethnography in psychological research and practice.......In this research, we explore the negotiation of a conflicted runner identity in a Finnish runner's short-term migration to Beijing, China. We examine the historical and cultural construction of the runner identity and discuss the current discourses that constitute the modern runner subjectivities....... From there, we continue with a Heideggerian existential-phenomenological analysis of the ‘boundary situation’ when the project of competitive running is challenged due to environmental and cultural barriers in the migration. Our empirical inquiry is based on the first author's autoethnographic account...

Exploring Genetic Suppression Interactions on a Global Scale

OpenAIRE

van Leeuwen, Jolanda; Pons, Carles; Mellor, Joseph C.; Yamaguchi, Takafumi N.; Friesen, Helena; Koschwanez, John; Ušaj, Mojca Mattiazzi; Pechlaner, Maria; Takar, Mehmet; Ušaj, Matej; VanderSluis, Benjamin; Andrusiak, Kerry; Bansal, Pritpal; Baryshnikova, Anastasia; Boone, Claire

2016-01-01

Genetic suppression occurs when the phenotypic defects caused by a mutation in a particular gene are rescued by a mutation in a second gene. To explore the principles of genetic suppression, we examined both literature-curated and unbiased experimental data, involving systematic genetic mapping and whole-genome sequencing, to generate a large-scale suppression network among yeast genes. Most suppression pairs identified novel relationships among functionally related genes, providing new insig...

An Exploration of Blended Learning in Fifth Grade Literacy Classrooms

Science.gov (United States)

Ramadan, Kimberly Heintschel

2017-01-01

The development of the Internet allows for hybrid models of instruction that marry face-to-face and online learning (Osguthorpe & Graham, 2003). The purpose of this study was to explore blended learning and traditional instruction in three fifth grade literacy classrooms, examining the teaching and learning students engaged in during the…

Surface Explorations : 3D Moving Images as Cartographies of Time

NARCIS (Netherlands)

Verhoeff, N.

2016-01-01

Moving images of travel and exploration have a long history. In this essay I will examine how the trope of navigation in 3D moving images can work towards an intimate and haptic encounter with other times and other places – elsewhen and elsewhere. The particular navigational construction of space in

Alliance Concentration in Multinational Companies : Examining Alliance Portfolios, Firm Structure, and Firm Performance

NARCIS (Netherlands)

Bos, Brenda; Faems, Dries; Noseleit, Florian

Research summary: This article explores the distribution of alliances across firms' internal structure. Focusing on multinational companies, we examine the impact of alliance portfolio concentrationi.e., the extent to which alliances are concentrated within a limited number of geographic unitson

Alliance Concentration in Multinational Companies : Examining Alliance Portfolios, Firm Structure, and Firm Performance

NARCIS (Netherlands)

Bos, Brenda; Faems, Dries; Noseleit, Florian

2017-01-01

Research summary: This article explores the distribution of alliances across firms' internal structure. Focusing on multinational companies, we examine the impact of alliance portfolio concentrationi.e., the extent to which alliances are concentrated within a limited number of geographic unitson

Exploring the Largest Mass Fraction of the Solar System: the Case for Planetary Interiors

Science.gov (United States)

Danielson, L. R.; Draper, D.; Righter, K.; McCubbin, F.; Boyce, J.

2017-01-01

Why explore planetary interiors: The typical image that comes to mind for planetary science is that of a planet surface. And while surface data drive our exploration of evolved geologic processes, it is the interiors of planets that hold the key to planetary origins via accretionary and early differentiation processes. It is that initial setting of the bulk planet composition that sets the stage for all geologic processes that follow. But nearly all of the mass of planets is inaccessible to direct examination, making experimentation an absolute necessity for full planetary exploration.

La cirugía del sistema nervioso

Directory of Open Access Journals (Sweden)

William Sharpe

1940-08-01

Full Text Available Durante estos últimos dos años me he dado a la tarea de revisar las observaciones y reexaminar los pacientes que operé en los veinticinco años que se extienden de 1913 a enero 1 de 1938. En solo un 71% pudo completarse expediente de los enfermos, debido sobre todo a la dificultad de localizar los casos traumáticos, que habían sido hospitalizados en nuestras salas, así como los de emergencia. Mi impresión acerca del resultado último, en lo que concierne a la habilidad ulterior del individuo para ganarse la subsistencia y constituirse en un ente útil a la comunidad, ha sido de lo mas desalentadora, en particular, respecto a los que habían padecido de lesiones del sistema nervioso central, tales como neoplasmas y traumatismos crónicos del cerebro, abscesos cerebrales o hidrocefalia interna. En cambio, los resultados obtenidos en la neuralgia del trigémino, las lesiones de la médula espinal, del plexo branquial y nervios periféricos, externa, la hidrocefalia en sus formas benignas, en los traumatismos crónicos del cerebro, a causa de la hemorragia supracortical, han sido favorables; y de lo más satisfactorio en los traumatismos cerebrales recientes tanto del adulto como del recién nacido.

Maduración cerebral y desarrollo cognoscitivo

Directory of Open Access Journals (Sweden)

Mónica Rosselli

2003-01-01

Full Text Available La maduración cerebral se correlaciona con muchos de los cambios cognoscitivos y de comportamiento observados durante la infancia y la adolescencia. En este artículo se revisa el concepto de maduración cerebral y su asociación con el desarrollo de la preferencia manual, del lenguaje verbal y de la función ejecutiva en el niño. Se describe el incremento de las arborizaciones dendríticas como el cambio cortical más importante asociado a la adquisición de funciones cognoscitivas complejas. Se asocia la maduración del hemisferio derecho con la conducta emocional y la maduración del hemisferio izquierdo con el lenguaje. La maduración de las áreas prefrontales se correlaciona con el desarrollo de las funciones ejecutivas. Se presentan ejemplos específicos sobre la existencia de asimetría cerebral motriz desde el nacimiento y sobre la lateralización posterior de funciones visuales, auditivas y táctiles. Se analiza la participación cualitativamente diferente de los hemisferios cerebrales en los procesos cognoscitivos durante las distintas etapas del desarrollo del niño. Finalmente, se presentan algunos ejemplos de las secuelas cognoscitivas secundarias a lesiones cerebrales tempranas como un método más para entender la ontogenia de la asimetría cerebral

Maduración cerebral y desarrollo cognoscitivo

Directory of Open Access Journals (Sweden)

Mónica Roselli

2003-05-01

Full Text Available La maduración cerebral se correlaciona con muchos de los cambios cognoscitivos y de comportamiento observados durante la infancia y la adolescencia. En este artículo se revisa el concepto de maduración cerebral y su asociación con el desarrollo de la preferencia manual, del lenguaje verbal y de la función ejecutiva en el niño. Se describe el incremento de las arborizaciones dendríticas como el cambio cortical más importante asociado a la adquisición de funciones cognoscitivas complejas. Se asocia la maduración del hemisferio derecho con la conducta emocional y la maduración del hemisferio izquierdo con el lenguaje. La maduración de las áreas prefrontales se correlaciona con el desarrollo de las funciones ejecutivas. Se presentan ejemplos específicos sobre la existencia de asimetría cerebral motriz desde el nacimiento y sobre la lateralización posterior de funciones visuales, auditivas y táctiles. Se analiza la participación cualitativamente diferente de los hemisferios cerebrales en los procesos cognoscitivos durante las distintas etapas del desarrollo del niño. Finalmente, se presentan algunos ejemplos de las secuelas cognoscitivas secundarias a lesiones cerebrales tempranas como un método más para entender la ontogenia de la asimetría cerebral.

An Exploration of the Examination Script Features that Most Influence Expert Judgements in Three Methods of Evaluating Script Quality

Science.gov (United States)

Suto, Irenka; Novakovic, Nadezda

2012-01-01

Some methods of determining grade boundaries within examinations, such as awarding, paired comparisons, and rank ordering, entail expert judgements of script quality. We aimed to identify the features of examinees' scripts that most influence judgements in the three methods. For contrasting examinations in biology and English, a Latin square…

Low-Latency Science Exploration of Planetary Bodies: How ISS Might Be Used as Part of a Low-Latency Analog Campaign for Human Exploration

Science.gov (United States)

Thronson, Harley; Valinia, Azita; Bleacher, Jacob; Eigenbrode, Jennifer; Garvin, Jim; Petro, Noah

2014-01-01

We suggest that the International Space Station be used to examine the application and validation of low-latency telepresence for surface exploration from space as an alternative, precursor, or potentially as an adjunct to astronaut "boots on the ground." To this end, controlled experiments that build upon and complement ground-based analog field studies will be critical for assessing the effects of different latencies (0 to 500 milliseconds), task complexity, and alternate forms of feedback to the operator. These experiments serve as an example of a pathfinder for NASA's roadmap of missions to Mars with low-latency telerobotic exploration as a precursor to astronaut's landing on the surface to conduct geological tasks.

Marine Mineral Exploration

DEFF Research Database (Denmark)

in EEZ areas are fairly unknown; many areas need detailed mapping and mineral exploration, and the majority of coastal or island states with large EEZ areas have little experience in exploration for marine hard minerals. This book describes the systematic steps in marine mineral exploration....... Such exploration requires knowledge of mineral deposits and models of their formation, of geophysical and geochemical exploration methods, and of data evaluation and interpretation methods. These topics are described in detail by an international group of authors. A short description is also given of marine...

Examining the Characteristics of Digital Learning Games Designed by In-Service Teachers

Science.gov (United States)

An, Yun-Jo; Cao, Li

2017-01-01

In order to better understand teachers' perspectives on the design and development of digital game-based learning environments, this study examined the characteristics of digital learning games designed by teachers. In addition, this study explored how game design and peer critique activities influenced their perceptions of digital game-based…

Exploring Animal-Assisted Therapy as a Reading Intervention Strategy

Science.gov (United States)

Kaymen, Maria S.

2005-01-01

This study is an examination of animal-assisted therapy in an attempt to explore the ways it may serve as reading intervention program for struggling readers. Due to the low rate of literacy in the U.S., children are often put into reading intervention programs where they are required to read to an adult; potentially creating anxiety that may act…

The Role of Classroom Characteristics for Students' Motivation and Career Exploration

Science.gov (United States)

Lazarides, Rebecca; Rohowski, Susanne; Ohlemann, Svenja; Ittel, Angela

2016-01-01

This study focused on students enrolled in obligatory vocational education courses in German secondary schools that aim to support students' career exploration. The study examined the relations between student-perceived classroom characteristics (support for autonomy, competence and relatedness), students' intrinsic motivation and their career…

Enacting Informal Science Learning: Exploring the Battle for Informal Learning

Science.gov (United States)

Clapham, Andrew

2016-01-01

Informal Science Learning (ISL) is a policy narrative of interest in the United Kingdom and abroad. This paper explores how a group of English secondary school science teachers, enacted ISL science clubs through employing the Periodic Table of Videos. It examines how these teachers "battled" to enact ISL policy in performative conditions…

Wearing the T-shirt: an exploration of the ideological underpinnings ...

African Journals Online (AJOL)

The article explores the ideological underpinnings of those narratives in four sections: 1) Paper-thin facts presents certain attitudes about Africa and the African body that have come into currency in relation to colonialism; 2) A matter of mor(t)ality examines the relationship between morality and the mortality of the African ...

Distinct Hippocampal versus Frontoparietal Network Contributions to Retrieval and Memory-guided Exploration.

Science.gov (United States)

Bridge, Donna J; Cohen, Neal J; Voss, Joel L

2017-08-01

Memory can profoundly influence new learning, presumably because memory optimizes exploration of to-be-learned material. Although hippocampus and frontoparietal networks have been implicated in memory-guided exploration, their specific and interactive roles have not been identified. We examined eye movements during fMRI scanning to identify neural correlates of the influences of memory retrieval on exploration and learning. After retrieval of one object in a multiobject array, viewing was strategically directed away from the retrieved object toward nonretrieved objects, such that exploration was directed toward to-be-learned content. Retrieved objects later served as optimal reminder cues, indicating that exploration caused memory to become structured around the retrieved content. Hippocampal activity was associated with memory retrieval, whereas frontoparietal activity varied with strategic viewing patterns deployed after retrieval, thus providing spatiotemporal dissociation of memory retrieval from memory-guided learning strategies. Time-lagged fMRI connectivity analyses indicated that hippocampal activity predicted frontoparietal activity to a greater extent for a condition in which retrieval guided exploration occurred than for a passive control condition in which exploration was not influenced by retrieval. This demonstrates network-level interaction effects specific to influences of memory on strategic exploration. These findings show how memory guides behavior during learning and demonstrate distinct yet interactive hippocampal-frontoparietal roles in implementing strategic exploration behaviors that determine the fate of evolving memory representations.

Distinct hippocampal versus frontoparietal-network contributions to retrieval and memory-guided exploration

Science.gov (United States)

Bridge, Donna J.; Cohen, Neal J.; Voss, Joel L.

2017-01-01

Memory can profoundly influence new learning, presumably because memory optimizes exploration of to-be-learned material. Although hippocampus and frontoparietal networks have been implicated in memory-guided exploration, their specific and interactive roles have not been identified. We examined eye movements during fMRI scanning to identify neural correlates of the influences of memory retrieval on exploration and learning. Following retrieval of one object in a multi-object array, viewing was strategically directed away from the retrieved object toward non-retrieved objects, such that exploration was directed towards to-be-learned content. Retrieved objects later served as optimal reminder cues, indicating that exploration caused memory to become structured around the retrieved content. Hippocampal activity was associated with memory retrieval whereas frontoparietal activity varied with strategic viewing patterns deployed following retrieval, thus providing spatiotemporal dissociation of memory retrieval from memory-guided learning strategies. Time-lagged fMRI connectivity analyses indicated that hippocampal activity predicted frontoparietal activity to a greater extent for a condition in which retrieval guided exploration than for a passive control condition in which exploration was not influenced by retrieval. This demonstrates network-level interaction effects specific to influences of memory on strategic exploration. These findings show how memory guides behavior during learning and demonstrate distinct yet interactive hippocampal-frontoparietal roles in implementing strategic exploration behaviors that determine the fate of evolving memory representations. PMID:28471729

A Qualitative Exploration of Therapeutic Relationships from the Perspective of Six Children Receiving Speech-Language Therapy

Science.gov (United States)

Fourie, Robert; Crowley, Niamh; Oliviera, Ana

2011-01-01

Although some studies have explored the adult therapeutic relationship in speech-language pathology, few, if any, have examined it with regard to children. This study aimed to explore the therapeutic relationship in pediatric speech and language therapy, focusing on the child's experience. Accordingly, the study was qualitative and involved the…

Participation of Parents in the Early Exploration of Tactile Graphics by Children Who Are Visually Impaired

Science.gov (United States)

Ryles, Ruby; Bell, Edward

2009-01-01

Seventy-three children with visual impairments aged 2-10 and their parents participated in a project that examined the children's interest in and exploration of tactile graphics. The parents reported that the children's interest in and conceptual understanding of the project's tactile workbook were high and that the children explored the…

Exploration technology

Energy Technology Data Exchange (ETDEWEB)

Roennevik, H.C. [Saga Petroleum A/S, Forus (Norway)

1996-12-31

The paper evaluates exploration technology. Topics discussed are: Visions; the subsurface challenge; the creative tension; the exploration process; seismic; geology; organic geochemistry; seismic resolution; integration; drilling; value creation. 4 refs., 22 figs.

An exploration of needs and preferences for dietary support in colorectal cancer survivors : A mixed-methods study

NARCIS (Netherlands)

Hoedjes, M.; De Kruif, Anja; Mols, F.; Bours, Martijn; Beijer, Sandra; Winkels, Renate; Westerman, Marjan J.; Seidell, Jaap C.; Kampman, Ellen; De Souza, Russell J.

2017-01-01

Purpose: To describe the proportion of colorectal cancer (CRC) survivors who perceive a need for dietary support; to examine which socio-demographic, cancer-related, and health-related characteristics are associated with this need; to explore reasons for (not) needing support; and to explore CRC

An exploration of needs and preferences for dietary support in colorectal cancer survivors : A mixed-methods study

NARCIS (Netherlands)

Hoedjes, Meeke; De Kruif, Anja; Mols, Floortje; Bours, Martijn; Beijer, Sandra; Winkels, Renate; Westerman, Marjan J.; Seidell, Jaap C.; Kampman, Ellen

2017-01-01

PURPOSE: To describe the proportion of colorectal cancer (CRC) survivors who perceive a need for dietary support; to examine which socio-demographic, cancer-related, and health-related characteristics are associated with this need; to explore reasons for (not) needing support; and to explore CRC

Modelling oil exploration

International Nuclear Information System (INIS)

Padilla, V.R.

1992-01-01

The analysis of oil exploration models in this paper is developed in four parts. The way in which exploration has been dealt with in oil supply models is first described. Five recent models are then looked at, paying particular attention to the explanatory variables used when modelling exploration activities. This is followed by a discussion of the factors which have been shown by several empirical studies to determine exploration in less developed countries. Finally, the interdependence between institutional factors, oil prices and exploration effort is analysed with a view to drawing conclusions for modelling in the future. (UK)

  Information and acceptance of prenatal examinations - a qualitative study

DEFF Research Database (Denmark)

Fleron, Stina Lou; Dahl, Katja; Risør, Mette Bech

by the health care system offering it. By prenatal examinations the pregnant women want to be giving the choice of future management should there be something wrong with their child. Conclusions:Participation in prenatal examinations is not based on a thorough knowledge of pros and contra of the screening tests......  Background:In 2004 The Danish National Board of Health issued new guidelines on prenatal examinations. The importance of informed decision making is strongly emphasised and any acceptance of the screenings tests offered should be based on thorough and adequate information. Objective...... and hypothesis:To explore the influence of information in the decision-making process of prenatal screenings tests offered, the relation between information, knowledge and up-take rates and reasons for accepting or declining the screenings tests offered.  Methods:The study is based on a qualitative approach...

What Limits the Encoding Effect of Note-Taking? A Meta-Analytic Examination

Science.gov (United States)

Kobayashi, K.

2005-01-01

Previous meta-analyses indicate that the overall encoding effect of note-taking is positive but modest. This meta-analysis of 57 note-taking versus no note-taking comparison studies explored what limits the encoding effect by examining the moderating influence of seven variables: intervention, schooling level, presentation mode and length, test…

An Exploration of the Relationships between Mentor Recruitment, the Implementation of Mentoring, and Mentors' Attitudes

Science.gov (United States)

Nasser-Abu Alhija, Fadia; Fresko, Barbara

2014-01-01

Mentoring of new teachers is generally examined from the viewpoint of the mentees. In the present study, mentoring is explored based on reports from mentors within the context of the Israeli induction program. Recruitment variables (selection and training) were examined in relation to mentoring implementation (frequency, initiation, regularity,…

Relación entre atrofia cortical difusa y desempeño cognitivo : estudio en población mayor de 60 años en un hospital universitario en la ciudad de Bogotá

OpenAIRE

Cogollos, Jenny Natalia; Piedrahita, Paula Viviana; Urquijo, Paula Andrea

2016-01-01

El presente trabajo tuvo como objetivo evaluar la existencia de la relación entre la atrofia cortical difusa objetivada por neuroimagenes cerebrales y desempeños cognitivos determinados mediante la aplicación de pruebas neuropsicológicas que evalúan memoria de trabajo, razonamiento simbólico verbal y memoria anterógrada declarativa. Participaron 114 sujetos reclutados en el Hospital Universitario Mayor Méderi de la ciudad de Bogotá mediante muestreo de conveniencia. Los resultados arrojaron...

Estudio de técnicas de análisis y clasificación de señales EEG en el contexto de sistemas BCI (Brain Computer Interface)

OpenAIRE

Henríquez Muñoz, Claudia Nureibis

2014-01-01

Máster universitario en Investigación e Innovación en TIC. Las Interfaces Cerebro Computador (BCI) son una tecnología basada en la adquisición y procesamiento de señales cerebrales para el control de diversos dispositivos. Su objetivo principal es proporcionar un nuevo canal de salida al cerebro del usuario que requiere un control adaptativo voluntario. Usualmente los BCI se enfocan en reconocer eventos que son adquiridos por métodos como el Electroencefalograma (EEG). Dicho...

Sistema de adquisición de onda cerebral mediante electrodos secos y comunicación inalámbrica: aplicación a detección de somnolencia

OpenAIRE

Vilatuña Canchigña, Betty Janneth; Yanchaliquín Guamán, Vanessa Jaqueline; Álvarez Rueda, Robin

2007-01-01

Este proyecto esta orientado a solucionar el problema de somnolencia en conductores de vehículos procurando disminuir los accidentes de tránsito, para lo cual se construyó un equipo instrumental que capta las ondas cerebrales emitiendo una señal de alerta oportuna cuando se detecta adormecimiento. Para conseguir este objetivo se trabaja con la señal de electroencefalograma (EEG), el cual se mide como una diferencia de voltaje entre dos electrodos. Esta señal biológica...

Desarrollo de una herramienta de arquitectura abierta para la visualización y análisis de señales EEG

OpenAIRE

Arango, Ramiro; Naranjo, John Jairo

2010-01-01

El sistema nervioso funciona mediante contactos eléctricos entre neuronas, configurando circuitos específicos para cada función neurológica. La electroencefalografía es una técnica exploratoria no invasiva, que permite registrar la actividad bioeléctrica (ondas cerebrales) de las neuronas de la corteza cerebral, mediante unos aparatos adecuados y la colocación previa de unos electrodos, en unas posiciones estándar. El registro gráfico obtenido se denomina electroencefalogr...

Neuro-spect: Imaginología funcional en psiqyuiatría

OpenAIRE

Ismael Mena, G.

2013-01-01

Durante los últimos años la imagenología funcional presentada por Neuro-Spect se ha ido incorporando progresivamente al diagnóstico diferencial de la patología psiquiátrica especialmente trastorno del ánimo, psicosis, esquizofrenia, trastornos cognitivos como enfermedad de Alzheimer´s, el trastorno obsesivo compulsivo, el déficit atencional y sobretodo los efectos cerebrales de neurotóxicos. En este trabajo publicaremos y comentaremos inicialmente los hallazgos en infarto cerebral hiper-agudo...

Y en el principio era Tlön: transmedia de origen literario en las narrativas hispánicas

OpenAIRE

Sánchez Aparicio, Vega

2014-01-01

[ES] Una misma galaxia creativa aproxima y combina mensajes y contenidos desde todos los ámbitos y disciplinas. La narrativa transmedia se suma a este universo procedimental y presenta estrategias vinculadas a las estructuras cerebrales y tecnológicas. El presente texto profundizará en su esencia desterritorializada a partir del análisis de las obras Alba Cromm, de Vicente Luis Mora, y La muerte me da, de Cristina Rivera Garza. [EN] A single creative galaxy approaches and combines both mess...

Exploring the impact of the constructs of the three-domain approach ...

African Journals Online (AJOL)

This article explores the constructs of private social and commercial hospitality in a panoramic examination of the impact and potential future development of the three-domain approach. Focused primarily (but not exclusively) on the books In Search of Hospitality: theoretical perspectives and debates, and Hospitality: A ...

Participation Patterns of Korean Adolescents in School-Based Career Exploration Activities

Science.gov (United States)

Rojewski, Jay W.; Lee, In Heok; Hill, Roger B.

2014-01-01

Variations in the school-based career exploration activities of Korean high school students were examined. Data represented 5,227 Korean adolescents in Grade 11 contained in the Korean Education Longitudinal Study of 2005, a nationally representative longitudinal database administered by the Korean Educational Development Institute. Latent class…

Health, Wealth and Wisdom: Exploring Multidimensional Inequality in a Developing Country

Science.gov (United States)

Nilsson, Therese

2010-01-01

Despite a broad theoretical literature on multidimensional inequality and a widespread belief that welfare is not synonymous to income--not the least in a developing context--empirical inequality examinations rarely includes several welfare attributes. We explore three techniques on how to evaluate multidimensional inequality using Zambian…

[Analysis of 163 rib fractures by imaging examination].

Science.gov (United States)

Song, Tian-fu; Wang, Chao-chao

2014-12-01

To explore the applications of imaging examination on rib fracture sites in forensic identification. Features including the sites, numbers of the processed imaging examination and the first radiological technology at diagnosis in 56 cases of rib fractures from 163 injuries were retrospectively analyzed. The detection rate of the rib fractures within 14 days was 65.6%. The initial detection rate of anterior rib fracture proceeded by X-ray was 76.2%, then 90.5% detected at a second time X-ray, while the detection rate of CT was 66.7% and 80.0%, respectively. The initial detec- tion rate of rib fracture in axillary section proceeded by X-ray was 27.6%, then 58.6% detected at a second time X-ray, while the detection rate of CT was 54.3% and 80.4%, respectively. The initial detection rate of posterior rib fracture proceeded by X-ray was 63.6%, then 81.8% detected at a second time X-ray, while the detection rate of CT was 50.0% and 70.0%, respectively. It is important to pay attention to the use of combined imaging examinations and the follow-up results. In the cases of suspicious for rib fracture in axillary section, CT examination is suggested in such false X-ray negative cases.

Repatriate Career Exploration: A Path to Career Growth and Success

Science.gov (United States)

Zikic, Jelena; Novicevic, Milorad M.; Harvey, Michael; Breland, Jacob

2006-01-01

Purpose: The purpose of this paper is to examine repatriate career exploration as a continuing growth-oriented process and introduce repatriate hope as its crucial driver. Design/methodology/approach: Through a review of relevant literature, the framework of hope theory is introduced to argue for a more "agentic" view of the repatriate that can…

Whose banner are we waving? Exploring STEM partnerships for marginalized urban youth

Science.gov (United States)

Ridgeway, Monica L.; Yerrick, Randy K.

2018-03-01

This case study examines after school programming in citizen science from the perspective of Critical Race Theory. During the course of enacting community outreach projects this data was used to examine the positioning of experts, student, and teachers within the program. This study explores the role of race and ethnicity, and the ways in which marginalization can manifest itself with black urban youth and teachers. Implications for partner selection and training are addressed.

EEGVIS: A MATLAB toolbox for browsing, exploring, and viewing large datasets

Directory of Open Access Journals (Sweden)

Kay A Robbins

2012-05-01

Full Text Available Recent advances in data monitoring and sensor technology have accelerated the acquisition of very large data sets. Streaming data sets from instrumentation such as multi-channel EEG recording usually must undergo substantial pre-processing and artifact removal. Even when using automated procedures, most scientists engage in laborious manual examination and processing to assure high quality data and to indentify interesting or problematic data segments. Researchers also do not have a convenient method of method of visually assessing the effects of applying any stage in a processing pipeline. EEGVIS is a MATLAB toolbox that allows users to quickly explore multi-channel EEG and other large array-based data sets using multi-scale drill-down techniques. Customizable summary views reveal potentially interesting sections of data, which users can explore further by clicking to examine using detailed viewing components. The viewer and a companion browser are built on our MoBBED framework, which has a library of modular viewing components that can be mixed and matched to best reveal structure. Users can easily create new viewers for their specific data without any programming during the exploration process. These viewers automatically support pan, zoom, resizing of individual components, and cursor exploration. The toolbox can be used directly in MATLAB at any stage in a processing pipeline, as a plug in for EEGLAB, or as a standalone precompiled application without MATLAB running. EEGVIS and its supporting packages are freely available under the GNU general public license at http://visual.cs.utsa.edu/ eegvis.

EEGVIS: A MATLAB Toolbox for Browsing, Exploring, and Viewing Large Datasets.

Science.gov (United States)

Robbins, Kay A

2012-01-01

Recent advances in data monitoring and sensor technology have accelerated the acquisition of very large data sets. Streaming data sets from instrumentation such as multi-channel EEG recording usually must undergo substantial pre-processing and artifact removal. Even when using automated procedures, most scientists engage in laborious manual examination and processing to assure high quality data and to indentify interesting or problematic data segments. Researchers also do not have a convenient method of method of visually assessing the effects of applying any stage in a processing pipeline. EEGVIS is a MATLAB toolbox that allows users to quickly explore multi-channel EEG and other large array-based data sets using multi-scale drill-down techniques. Customizable summary views reveal potentially interesting sections of data, which users can explore further by clicking to examine using detailed viewing components. The viewer and a companion browser are built on our MoBBED framework, which has a library of modular viewing components that can be mixed and matched to best reveal structure. Users can easily create new viewers for their specific data without any programming during the exploration process. These viewers automatically support pan, zoom, resizing of individual components, and cursor exploration. The toolbox can be used directly in MATLAB at any stage in a processing pipeline, as a plug-in for EEGLAB, or as a standalone precompiled application without MATLAB running. EEGVIS and its supporting packages are freely available under the GNU general public license at http://visual.cs.utsa.edu/eegvis.

Role Conflict in Academic Organizations: An Exploratory Examination of the Department Chairman's Experience

Science.gov (United States)

Carroll, Archie B.

1974-01-01

A probe was made into the relationship between perceived role conflict and focal person satisfaction, as measured by the reported need deficiency of university department chairmen. Additionally, six key decision areas were examined exploring the existence of role conflict in departmental chairman decisionmaking. (Author)

Scale determinants of fiscal investment in geological exploration: evidence from China.

Science.gov (United States)

Lu, Linna; Lei, Yalin

2013-01-01

With the continued growth in demand for mineral resources and China's efforts in increasing investment in geological prospecting, fiscal investment in geological exploration becomes a research hotspot. This paper examines the yearly relationship among fiscal investment in geological exploration of the current term, that of the last term and prices of mining rights over the period 1999-2009. Hines and Catephores' investment acceleration model is applied to describe the scale determinants of fiscal investment in geological exploration which are value-added of mining rights, value of mining rights and fiscal investment in the last term. The results indicate that when value-added of mining rights, value of mining rights or fiscal investment in the last term moves at 1 unit, fiscal investment in the current term will move 0.381, 1.094 or 0.907 units respectively. In order to determine the scale of fiscal investment in geological exploration for the current year, the Chinese government should take fiscal investment in geological exploration for the last year and the capital stock of the previous investments into account. In practice, combination of government fiscal investment in geological exploration with its performance evaluation can create a virtuous circle of capital management mechanism.

Moving the Weber Fraction: The Perceptual Precision for Moment of Inertia Increases with Exploration Force

Science.gov (United States)

Debats, Nienke B.; Kingma, Idsart; Beek, Peter J.; Smeets, Jeroen B. J.

2012-01-01

How does the magnitude of the exploration force influence the precision of haptic perceptual estimates? To address this question, we examined the perceptual precision for moment of inertia (i.e., an object's “angular mass”) under different force conditions, using the Weber fraction to quantify perceptual precision. Participants rotated a rod around a fixed axis and judged its moment of inertia in a two-alternative forced-choice task. We instructed different levels of exploration force, thereby manipulating the magnitude of both the exploration force and the angular acceleration. These are the two signals that are needed by the nervous system to estimate moment of inertia. Importantly, one can assume that the absolute noise on both signals increases with an increase in the signals' magnitudes, while the relative noise (i.e., noise/signal) decreases with an increase in signal magnitude. We examined how the perceptual precision for moment of inertia was affected by this neural noise. In a first experiment we found that a low exploration force caused a higher Weber fraction (22%) than a high exploration force (13%), which suggested that the perceptual precision was constrained by the relative noise. This hypothesis was supported by the result of a second experiment, in which we found that the relationship between exploration force and Weber fraction had a similar shape as the theoretical relationship between signal magnitude and relative noise. The present study thus demonstrated that the amount of force used to explore an object can profoundly influence the precision by which its properties are perceived. PMID:23028437

Exploring Seafloor Volcanoes in Cyberspace: NOAA's "Ocean Explorer" Inspires Inquiry

Science.gov (United States)

Hjelm, Elizabeth

2011-01-01

Seafloor exploration being done by scientists is an ideal way to introduce students to technology as a tool for inquiry. The same technology that allows scientists to share data in near real time can also provide students the tools to become researchers. NOAA's Ocean Explorer Explorations website is a rich research data bank that can be used by…

Russian Planetary Exploration History, Development, Legacy, Prospects

CERN Document Server

Harvey, Brian

2007-01-01

Russia’s accomplishments in planetary space exploration were not achieved easily. Formerly, the USSR experienced frustration in trying to tame unreliable Molniya and Proton upper stages and in tracking spacecraft over long distances. This book will assess the scientific haul of data from the Venus and Mars missions and look at the engineering approaches. The USSR developed several generations of planetary probes: from MV and Zond to the Phobos type. The engineering techniques used and the science packages are examined, as well as the nature of the difficulties encountered which ruined several missions. The programme’s scientific and engineering legacy is also addressed, as well as its role within the Soviet space programme as a whole. Brian Harvey concludes by looking forward to future Russian planetary exploration (e.g Phobos Grunt sample return mission). Several plans have been considered and may, with a restoration of funding, come to fruition. Soviet studies of deep space and Mars missions (e.g. TMK, ...

Income-related inequality in health and health-related behaviour: exploring the equalisation hypothesis

OpenAIRE

Vallejo-Torres, Laura; Hale, Daniel; Morris, Stephen; Viner, Russell M

2014-01-01

Background Previous studies have found the socioeconomic gradient in health among adolescents to be lower than that observed during childhood and adulthood. The aim of this study was to examine income-related inequalities in health and health-related behaviour across the lifespan in England to explore ‘equalisation’ in adolescence. Methods We used five years of data (2006–2010) from the Health Survey for England to explore inequalities in six indicators: self-assessed general health, longstan...

Examining the Impact of Technology on Primary Students' Revision of Written Work

Science.gov (United States)

Lisy, Jennifer Garrette

2015-01-01

Few studies have examined the revision processes of second grade students and even fewer have explored the impact of digital writing on young students' revisions. This study utilized a within subject crossover trial using randomized block assignment (AB | BA) for counterbalancing. This study sought to determine (1) whether revising on paper versus…

The Contribution of the Counselor-Client Working Alliance to Career Exploration

Science.gov (United States)

Elad-Strenger, Julia; Littman-Ovadia, Hadassah

2012-01-01

This longitudinal study examines the effects of Israeli counselors' and clients' ratings of their working alliance on clients' career exploration (CE), using a sample of 94 three-session career counseling processes. Results reveal that both clients' and counselors' working alliance ratings increased over time; yet, clients' ratings remained…

Opportunity Examining Composition of 'Cook Islands' Outcrop

Science.gov (United States)

2009-01-01

This image taken by the front hazard-avoidance camera on NASA's Mars Exploration Rover Opportunity shows the rover's arm extended to examine the composition of a rock using the alpha particle X-ray spectrometer. Opportunity took this image during the 1,826th Martian day, or sol, of the rover's Mars-surface mission (March 13, 2009). The spectrometer is at a target called 'Penrhyn,' on a rock called 'Cook Islands.' As Opportunity makes its way on a long journey from Victoria Crater toward Endeavour Crater, the team is stopping the drive occasionally on the route to check whether the rover finds a trend in the composition of rock exposures.

Medical and technology requirements for human solar system exploration missions

Science.gov (United States)

Nicogossian, Arnauld; Harris, Leonard; Couch, Lana; Sulzman, Frank; Gaiser, Karen

1989-01-01

Measures that need to be taken to cope with the health problems posed by zero gravity and radiation in manned solar system exploration missions are discussed. The particular systems that will be used aboard Space Station Freedom are addressed, and relevant human factors problems are examined. The development of a controlled ecological life support system is addressed.

Impairments of exploration and memory after systemic or prelimbic D1-receptor antagonism in rats

DEFF Research Database (Denmark)

Clausen, Bettina; Schachtman, Todd R.; Mark, Louise T.

2011-01-01

to examine the effects on memory: cross-maze and object recognition task. Systemic administration reduced spatial exploration in cross-maze as well as in an open field test, and also reduced object exploration. Spatial (hippocampus-dependent) short-term memory was inhibited in the cross-maze and non......-spatial short-term object retention was also impaired. In contrast to these systemic effects, bilateral injections of SCH23390 into the prelimbic cortices altered neither spatial nor object exploration, but did inhibit short-term memory in both cross-maze and object recognition task. Therefore, the inhibiting......D1-receptor antagonism is known to impair rodent memory but also inhibits spontaneous exploration of stimuli to be remembered. Hypo-exploration could contribute to impaired memory by influencing event processing. In order to explore this effect, the D1 receptor antagonist, SCH23390...

Riesgo de ictus isquémico en niños con Sβ talasemia. Estudio con Doppler transcraneal Risks of ischemic stroke in children suffering Sβ-thalassemia. Transcranial Doppler study

Directory of Open Access Journals (Sweden)

Claudio Enrique Scherle-Matamoros

2012-06-01

Full Text Available En niños con anemia por células falciformes, el riesgo de ictus isquémico varía según el genotipo de la hemoglobinopatía. En estos casos, la determinación de la velocidad de flujo sanguíneo mediante Doppler transcraneal (DTC puede predecir la ocurrencia de isquemia cerebral. Con el objetivo de describir las características del DTC en la Sβ talasemia, se estudiaron 32 enfermos menores de 18 años atendidos en el Instituto de Hematología e Inmunología y remitidos para su evaluación con ultrasonido. La edad media de los niños fue de 10,5 años. Se estudió la misma cantidad de enfermos con cada genotipo Sβ; solamente en un paciente la ventana temporal no fue útil. En el 97 % de los enfermos la velocidad media de flujo en las arterias cerebrales medias era inferior a 170 cm/s y solo en un niño estaban en el rango del grupo condicional. Se registraron asimetrías interhemisféricas en la velocidad media de flujo de las arterias cerebrales anteriores en el 29 % de los casos; en el 19,6 % en las arterias cerebrales medias; y en el 6,4 % en las carótidas internas extracraneales. Los niveles más altos de velocidad media de flujo se registraron en los enfermos con Sβ0 talasemia y en las arterias cerebrales medias. Existió una correlación inversa entre la edad y los niveles de hemoglobina con la velocidad de flujo de los 3 vasos estudiados. El riesgo de ictus isquémico en la Sβ talasemia es bajo, sin diferencia entre los 2 genotipos evaluados.In children with sickle cell anemia, the risk of ischemic stroke varies according to genotype of hemoglobinopathy. In these cases, determining the velocity of blood flow by transcranial Doppler (TCD can predict the occurrence of cerebral ischemia. In order to describe the characteristics of DTC in Sβ thalassemia, we studied 32 patients younger than 18 treated at the Institute of Hematology and Immunology, who were referred for ultrasound assessment. The age rate of children was 10.5 years old

Exploring exploration orientation and its determinants : Some empirical evidence

NARCIS (Netherlands)

Commandeur, H.R.; Volberda, H.W.; Sidhu, J.S.

2004-01-01

Adopting an information-process perspective, this article conceptualizes exploration orientation in terms of scope of information acquisition. In line with this conceptualization, a multidimensional operational measure of exploration orientation is developed and its internal consistency established.

Religiousness and Alcohol Use in College Students: Examining Descriptive Drinking Norms as Mediators

Science.gov (United States)

Brechting, Emily H.; Carlson, Charles R.

2015-01-01

Religiousness has consistently emerged in the literature as a protective factor for alcohol use. Relatively few studies have empirically explored possible mechanisms for this robust effect. The present study examines descriptive drinking norms as a potential mediator of the religiousness--alcohol consumption association. Consistent with the…

Teacher's Turnover Intentions: Examining the Impact of Motivation and Organizational Commitment

Science.gov (United States)

Imran, Rabia; Allil, Kamaal; Mahmoud, Ali Bassam

2017-01-01

Purpose: The purpose of this paper is to explore the path of motivation leading to organizational commitment resulting in reduced turnover intentions (TIs). It examines the relationship between dimensions of motivation (amotivation, introjected regulations (IRs) and intrinsic motivation (IM)) with dimensions of commitment (affective, normative and…

Negative exploration for pyloric stenosis – Is it preventable?

Directory of Open Access Journals (Sweden)

Kenny Simon E

2008-09-01

Full Text Available Abstract Background The diagnosis of infantile hypertrophic pyloric stenosis (IHPS, although traditionally clinical, is now increasingly dependent on radiological corroboration. The rate of negative exploration in IHPS has been reported as 4%. The purpose of our study was to look at elements of supportive clinical evidence leading to positive diagnosis, and to review these with respect to misdiagnosed cases undergoing negative exploration. Methods All infants undergoing surgical exploration for IHPS between January 2000 and December 2004 were retrospectively analysed with regard to clinical symptoms, examination findings, investigations and operative findings. Results During the study period, 343 explorations were performed with a presumptive diagnosis of IHPS. Of these, 205 infants (60% had a positive test feed, 269 (78% had a positive ultrasound scan and 175 (55% were alkalotic (pH ≥7.45 and/or base excess ≥2.5. The positive predictive value for an ultrasound (US diagnosis was 99.1% for canal length ≥14 mm, and 98.7% for muscle thickness ≥4 mm. Four infants (1.1% underwent a negative surgical exploration; Ultrasound was positive in 3, and negative in 1(who underwent surgery on the basis of a positive upper GI contrast. One US reported as positive had a muscle thickness Conclusion A 1% rate of negative exploration in IHPS compares favourably with other studies. However potential causes of error were identified in all 4 cases. Confident diagnosis comprises a combination of positive test feed and an 'in house US' in an alkalotic infant. UGI contrast study should not be used in isolation to diagnose IHPS. If the test feed is negative, strict diagnostic measurements should be observed on US and the pyloric 'tumour' palpated on table under anaesthetic before exploration.

PathlinesExplorer — Image-based exploration of large-scale pathline fields

KAUST Repository

Nagoor, Omniah H.

2015-10-25

PathlinesExplorer is a novel image-based tool, which has been designed to visualize large scale pathline fields on a single computer [7]. PathlinesExplorer integrates explorable images (EI) technique [4] with order-independent transparency (OIT) method [2]. What makes this method different is that it allows users to handle large data on a single workstation. Although it is a view-dependent method, PathlinesExplorer combines both exploration and modification of visual aspects without re-accessing the original huge data. Our approach is based on constructing a per-pixel linked list data structure in which each pixel contains a list of pathline segments. With this view-dependent method, it is possible to filter, color-code, and explore large-scale flow data in real-time. In addition, optimization techniques such as early-ray termination and deferred shading are applied, which further improves the performance and scalability of our approach.

Experience based on 60 observations of scintigraphic bone exploration using pyrophosphates

International Nuclear Information System (INIS)

Mienville, J.-C.

1975-01-01

5 to 15 millicuries of technetium 99m-labelled pyrophosphates are injected intraveinously. 3 to 5 hours later, when the blood activity has dropped, the bone uptake is sufficient to give a good scintigraphic image of the skeleton. The skeleton may be explored one segment at a time, using a scanning scintigraph or a scintillation camera, or the whole skeleton front and back may be examined much more quickly with a 'whole-body' device. A study of 60 observations shows the large number of hyperfixations revealed by isotopic explorations in rheumatological diseases. A hyperfixation was observed in almost all bone localities of osteophilic cancers, osteonecrosis, Paget's disease, infections osteo-arthritis and algoneurodystrophy. On the other hand the isotopic test was found to be negative or inefficient in arthroses, osteoporosis and local bone manifestations of Kahler's or Hodgkin's disease. Finally inflammatory arthritis was detectable by scintigraphy in about half the cases studied. In reality a hyperfixation reflects a local rise in the metabolic activity of the bone at the moment of the examination. As a result the scintigraphic images lack specificity. This factor must therefore be accounted for in the patient's records and isotopic results compared with those of clinical and para-clinical examinations [fr

The Female Rescuer in Newbery Fiction: Exploring the Archetype of Mother.

Science.gov (United States)

Roberts, Sherron Killingsworth

2002-01-01

Examines the identity of female characters who rescue male protagonists in three works of Newbery-winning fiction, and realizes their archetypal roles of Mother. Provides readers with a vehicle for revisiting the interaction among characters in young adult fiction. Presents a rationale for using literary criticism to help students explore how…

Moving toward implementation : an examination of the organizational and political structures of transit-oriented development.

Science.gov (United States)

2009-06-01

The research explores the costs and impacts of Transit Oriented Development (TOD) and : addresses the rationale for designing transit-oriented neighborhoods. It also documents the : outcomes and the impacts of implementing such projects and examines ...

Opportunities and Challenges of Implementing Instructional Games in Mathematics Classrooms: Examining the Quality of Teacher-Student Interactions during the Cover-Up and Un-Cover Games

Science.gov (United States)

Heshmati, Saeideh; Kersting, Nicole; Sutton, Taliesin

2018-01-01

This study explored the design and implementation of the Cover-up and Un-cover games, two manipulative-based fraction games, in 14 fifth-grade classrooms. We examined how the fraction concepts were integrated into the game design and explored the nature of teacher-student interactions during games using lesson videos. Our examination showed that…

Exploration of Nursing Faculty Members' Lived Experiences of Objective Structured Clinical Examination (OSCE) in Undergraduate Nursing Education

Science.gov (United States)

Obizoba, Cordelia O.

2014-01-01

The purpose of this phenomenological study was to gain an understanding of nursing faculty members' lived experiences of Objective Structured Clinical Examination (OSCE) in undergraduate nursing education. As owners of their programs' curriculum, nursing faculties are charged with the responsibility of providing needed knowledge, skills, and…

In-Situ Resource Utilization for further exploration of the Moon

Science.gov (United States)

Thakore, B.; Pohajsky, S.

In-Situ Resource Utilization ISRU is the concept of living off the land Initially proposed in the mid 20th Century many experts have suggested that ISRU is an important enabler for the expansion of humanity beyond the confines of limited resources on Earth However even today ISRU remains a relatively underdeveloped and under--demonstrated in current exploration roadmaps This paper summarizes the proposals of an interdisciplinary study carried out by 27 students from 17 different countries at the International Space University The study reviewed the past and present ISRU techniques and related robotic technologies in the context of complementing the Moon and Mars exploration scenarios of the major space faring countries The economic viability and benefits of ISRU are examined together with the regulatory ethical and cultural aspects of space resource utilisation The renewed opportunities for moon exploration have rekindled interest in ISRU as an enabling technology It is important to assess both the tangible and intangible benefits of this technology in order to evaluate the technical and economic feasibility of adopting it in support of human exploration of the Moon Mars and beyond

Patients' experience of outsourcing and care related to magnetic resonance examinations.

Science.gov (United States)

Tavakol Olofsson, Parvin; Aspelin, Peter; Bergstrand, Lott; Blomqvist, Lennart

2014-11-01

Outsourcing radiological examinations from public university hospitals affects the patient, who has to attend a different clinic or hospital for the radiological examination. We currently have a limited understanding of how patients view outsourcing and their care related to MR examinations. To examine the experiences of patients who are sent to private radiology units when their referrals for MR examinations are outsourced from a university hospital, as well as to explore factors which influence patient satisfaction regarding the quality of care related to the MR examination. A group of patients (n = 160) referred for MR examinations and either examined at a university hospital or at an external private unit were interviewed. The interview was designed as a verbal questionnaire. Data were analyzed using Student's t test, analysis of variance (ANOVA), and Pearson's correlation. Sixty-nine percent of the patients could neither choose nor influence the location at which they were examined. For those who could, aspects that influenced the patient's choice of radiology department were: short waiting time 79% (127/160), ease of traveling to the radiology department 68% (110/160), and short distance to their home or work 58% (93/160). For 40% (60/160) of the patients, a short time in the waiting room was related to a positive experience of the MR examination. If patients were informed about outsourcing and could also choose where to have their examination, key factors contributing to patient satisfaction could be met even when MR examinations are outsourced.

Biospheres and solar system exploration

Science.gov (United States)

Paine, Thomas O.

1990-01-01

The implications of biosphere technology is briefly examined. The exploration status and prospects of each world in the solar system is briefly reviewed, including the asteroid belt, the moon, and comets. Five program elements are listed as particularly critical for future interplanetary operations during the coming extraterrestrial century. They include the following: (1) a highway to Space (earth orbits); (2) Orbital Spaceports to support spacecraft assembly, storage, repair, maintenance, refueling, launch, and recovery; (3) a Bridge Between Worlds to transport cargo and crews to the moon and beyond to Mars; (4) Prospecting and Resource Utilization Systems to map and characterize the resources of planets, moons, and asteroids; and (5) Closed Ecology Biospheres. The progress in these five field is reviewed.

Dynamic Reconfiguration in Planetary Exploration

DEFF Research Database (Denmark)

Cohn, Marisa

2014-01-01

In taking into account the ways in which material and social realms are constitutively entangled within organizations, it is rhetorically tempting to say that technologies and social structures reconfigure each other. But what does it mean to reconfigure? How does one "figure" the other and how do...... we fully embrace a mutually constitutive relationship when examining fluid relations? This paper delves into these questions by exploring how physical, social, material, technological, and organizational arrangements dynamically reconfigure each other in the duration of organizational practice. Using...... be gained by focusing attention on the dynamic reconfigurations between social and material realms. In so doing, we call attention to the ways in which current sociomaterial perspectives have difficulty articulating the shifting, figural, asymmetric and dynamic negotiations between people, social structures...

Hemorragias cerebrales y cambios en el E.C.G.

Directory of Open Access Journals (Sweden)

Geobel Marín Sánchez

1963-07-01

Full Text Available The case of a woman of 60 years of age with a cerebral hemorrhage and a tracing by an electrocardiograph characterized by inverted abd deep "T" waves, is presented, with a prolonging of the "QT" and in which in the autopsy it was impossible to obtain any evidence of a lesion in the myocardium. The most recent reports on this same subject are being checked and it emphasizes the need of having in mind such abnormality in the course of cerebrovascular accidents, in order to avoid mistaken behaviors.

MANEJO DE LOS TUMORES CEREBRALES ASTROCÍTICOS Y OLIGODENDROGLIALES

Directory of Open Access Journals (Sweden)

Dr. Enrique Concha

2017-05-01

Full Text Available Los tumores primarios del cerebro requieren un manejo multidisciplinario. En este artículo se presenta un modelo de tratamiento de los tumores más frecuentes del adulto, siendo el objetivo primordial alcanzar el equilibrio entre sobrevida y calidad de vida. Para este efecto, son agrupados según su clasificación de la Organización Mundial de la Salud (OMS y se analizan cirugía, radioterapia y quimioterapia según corresponda. Se discute el tratamiento de cada una de estas lesiones considerando el estado clínico del paciente, la localización y tamaño de la lesión y el riesgo de daño funcional del sistema nervioso. En especial, se considera la utilidad de diferentes técnicas que permiten proteger al cerebro durante el tratamiento.

Examination of the Topic-Specific Nature of Pedagogical Content Knowledge in Teaching Electrochemical Cells and Nuclear Reactions

Science.gov (United States)

Aydin, Sevgi; Friedrichsen, Patricia M.; Boz, Yezdan; Hanuscin, Deborah L.

2014-01-01

The purpose of this study was to examine experienced chemistry teachers' pedagogical content knowledge (PCK) for two different topics in chemistry to better understand how PCK is specific to topic, including whether all components of PCK are topic-specific and to what degree. To explore the topic-specific nature of PCK, we examined two experienced…

Por qué el ser humano crea obras artísticas

OpenAIRE

Velasco, Pedro

2004-01-01

Con base en los resultados que aportan la paleontología, los hallazgos neunoanatómicos cerebrales y el estudio neuroexperimental de las emociones, cuyos resultados se extrapolan a la que es esencial, específicamente humana, la angustía, se plantea que el hominido en su largo camino de la evolución desarrolló las estructuras y funciones necesarias para enfrentar exitosamente al medio ambiente, siempre hostil, y que estimulado por la angustia dejó (y sigue dejando) constancia de su paso por el ...

Entrenamiento asistido por neurofeedback: análisis de los efectos psicofisiológicos inmediatos y factores de personalidad influyentes

OpenAIRE

Aliño Costa, Marta

2017-01-01

Basado en la tecnología y principios de interfaz cerebro-ordenador (del inglés brain computer interface o BCI), el entrenamiento asistido por Neurofeedback (NF) se concibe como una técnica de autorregulación. Su paradigma estándar es, por excelencia, el condicionamiento operante o instrumental con la finalidad de enseñar a los individuos a controlar su actividad cerebral (Frank et al., 2010). Concretamente, la información procedente de las ondas cerebrales es representada a tiempo real en for...

Leucoencefalopatía posterior reversible secundaria a glomerulonefritis postestreptocócica: a propósito de un caso

OpenAIRE

BAZZINO, FERNANDO; PANDOLFO, SOLEDAD; PROTASIO, LAURA; PUJADAS, MóNICA; CERISOLA, ALFREDO; GONZáLEZ, GABRIEL; CAGGIANI, MARINA; RUBIO, IVONNE

2005-01-01

Resumen La leucoencefalopatía posterior reversible (LEPR) es una entidad clínico-radiológica que afecta habitualmente la sustancia blanca de los hemisferios cerebrales. Se asocia con frecuencia a hipertensión arterial aguda y al tratamiento inmunosupresor, entre otras causas. La presentación clínica es variada, con cefaleas, náuseas, vómitos, deterioro de conciencia y alteración en el comportamiento, convulsiones y trastornos visuales, síntomas que frecuentemente retroceden. La tomografía axi...

Síndrome de Aicardi: Presentación de un caso clínico y revisión de la literatura

OpenAIRE

Villarreal-Ybazeta, Miguel A; Tirado-Chavarría, Felicitas A; Calderón-Alarcón, Nila E

2016-01-01

El síndrome de Aicardi (SA), es una rara enfermedad neurogenética, diagnosticada clínicamente por la triada clásica de agenesia del cuerpo calloso, espasmos infantiles y lagunas corioretinales. El objetivo de nuestro trabajo fue presentar el espectro clínico y la evolución de este trastorno en un caso. Reportamos una lactante de dos meses, de malformaciones cerebrales múltiples, que ingresa a emergencia por presentar crisis convulsivas. Durante la hospitalización, los hallazgos clínicos - ele...

La neurociencia en las ciencias socio-humanas: una mirada transdiciplinar

OpenAIRE

Álvarez Duque, Martha Elena; Universidad de Medellín

2013-01-01

Este artículo tiene como propósito plantear la neurociencia como un nuevo paradigma, que asume un campo amplio del conocimiento, que no solo ha estudiado la estructuración y funcionamiento de los mecanismos cerebrales, los procesos cognitivos, las relaciones mente-cerebro, sino que, además, ha propuesto el horizonte de explicación de las complejas interacciones sociales y culturales mediadas a través de la educación, como dispositivo transformador y posibilitador del aprendizaje, realizado gr...

Teoría de la mente y esquizofrenia: aspectos conceptuales y evolutivos

OpenAIRE

Sánchez de las Matas Martín, María del Carmen

2014-01-01

El presente trabajo analiza diversas definiciones y clasificaciones de ciertos elementos y procesos que se suelen considerar como estructuras o funciones del “cerebro social”, por ejemplo, las neuronas espejo, la empatía afectiva y la teoría de la mente o metarrepresentación, en relación con el surgimiento de hipótesis evolutivas sobre los trastornos que, de manera aparentemente paradójica, suponen la supervivencia biológica en la especie de trastornos cerebrales antiempáticos, como el autism...

Efectividad del tratamiento con neurofeedback en trastornos del estado del ánimo, ansiedad y fibromialgia: una revisión de literatura

OpenAIRE

Barrera Ferro, Laura; Gómez Olivella, Estefanía; Prieto Lizarazo, Luisa Fernanda

2013-01-01

El neurofeedback es una técnica no invasiva en la que se pretende corregir, mediante condicionamiento operante, ondas cerebrales que se encuentren alteradas en el electroencefalograma. Desde 1967, se han conducido numerosas investigaciones relacionadas con los efectos de la técnica en el tratamiento de alteraciones psicológicas. Sin embargo, a la fecha no existen revisiones sistemáticas que reúnan los temas que serán aquí tratados. El aporte de este trabajo es la revisión de 56...

Dynamics of spontaneous activity in the cerebral cortex across brain states

OpenAIRE

Jercog, Daniel Alejandro

2013-01-01

[spa] La actividad espontánea en la corteza cerebral cambia en diferentes estados cerebrales. Durante estados desincronizados (e.g. estado de vigilia, sueño MOR), las poblaciones de neuronas en los potenciales de acción en una manera aparentemente estocástica y no correlacionada. Por el contrario, durante estados sincronizados (e.g. sueño de ondas lentas, anestesia) las neuronas corticales muestran la alternancia entre periodos de reposo (DOWN) y los períodos de actividad (UP) de manera coher...

Informe científico de Beca de Perfeccionamiento: Valdivia Torres, Lesly Spring (2013) 

OpenAIRE

Valdivia Torres, Lesly Spring

2016-01-01

La ingesta aguda de dieta alta en grasa activa la expresión de c-Fos en áreas cerebrales relacionadas al placer. El consumo de alimentos de alta palatabilidad es una experiencia gratificante para la mayoría de los animales, incluyendo los seres humanos. Varios estudios sugieren que el contexto actual en el que vivimos, donde dichos alimentos son de fácil acceso, promueve el consumo excesivo de calorías que pueden conducir a la obesidad o trastornos de la ali...

Genes candidatos para la comorbilidad entre trastornos de ansiedad y trastornos adictivos.

OpenAIRE

Gallego Moreno, Xavier

2008-01-01

Esta Tesis Doctoral ha consistido en el estudio de los mecanismos implicados en la comorbilidad entre el abuso de drogas y los trastornos de ansiedad, así como en las regiones cerebrales responsables de la coexistencia de estos dos trastornos en modelos transgénicos. Nos hemos centrado en dos grandes familias de genes, que podrían actuar como interfaz genético en la comorbilidad entre trastornos de ansiedad y de abuso de sustancias: neurotrofinas por su intervención en el neurodesarrollo y en...

Functional enviromics and personality disorders

OpenAIRE

Cuartas Arias, Mauricio; Universidad de San Buenaventura - Medellín, Colombia

2015-01-01

La enviromica funcional aborda el análisis de los mecanismos de tipo ambiental que subyacen al incremento en el riesgo de psicopatologías y trastornos de personalidad.Aunque para las ciencias básicas resulta aún complejo determinar cómo influye el ambiente, algunas aproximaciones han involucrado el estudio de las redes neuronales y los circuitos cerebrales en el adulto a partir del neurodesarrollo, el funcionamiento de los sistemas neuroendocrino y de neurotransmisión (NT), las dinámicas de v...

Alteraciones neuropsicológicas en el alcoholismo crónico

OpenAIRE

Junqué i Plaja, Carme, 1955-; Jurado, Ma. Ángeles (María Ángeles)

1991-01-01

El déficit neuropsicológico asociado al alcholismo abarca diversas funciones: memoria, razonamiento abstracto, solución de problemas y ha- bilidades perceptivo-motoras. Estructuralmente, los cambios cerebrales ob- servados con m i s frecuencia en la Tomografia Computarizada (TC) son la atrofia cerebral difusa y la dilatación ventricular. La dilatación ventri- cular es la medida de atrofia cerebral que m i s correlaciona con el déficit neuropsicológico. Desde ei punto de vista funcional, el fl...

Exploring the gender gap on nuclear disarmament

Energy Technology Data Exchange (ETDEWEB)

Cherrin, S.J.

1987-01-01

This research explores the relationship between sex/gender factors and attitudes toward peace and militarism to determine whether more women than men favor non-military solutions to peace to examine the effect of gender identity on these attitudes. The investigation also looks at participation in a peace group, a military setting, child care, and the traditional homemaker role, to see what effect these activities might have on attitudes toward peace and militarism. In addition, the study explores whether there is a correlation between attitudes favorable to feminism and orientation toward war and peace issues. This study is guided by the sociological perspective which assumes that sex and gender differences, to the extent they exist, may be influenced by the social roles defined as appropriate for women and men. In this exploration there is not a sex gap on peace and military attitudes. A feminine gender identity does not have an effect on the direction of attitudes toward peace or militarism. However, an overall identification with masculine traits, plus believing oneself to be dominant, competitive and aggressive is correlated with a non-pacifist world view. Results of this study show that participation in a peace group is the best determinant of a pro-peace attitude, whereas participation in a military setting tends to be associated with a pro-military attitude.

Examining Marketing Officers' Demographic Factors' Influence on MIHE Scores at California Community Colleges

Science.gov (United States)

Hall, Zachary Martin

2012-01-01

Research indicates that one way to investigate a college's dedication to marketing is to examine the role, influence, and support the marketing officer receives on their campus. Based on the literature's premise that marketing officers are a measure of commitment, this study explored the relationship between Marketing Index of Higher Education…

Dynamics of Context-Dependent Recall: An Examination of Internal and External Context Change

Science.gov (United States)

Unsworth, Nash; Spillers, Gregory J.; Brewer, Gene A.

2012-01-01

Retrieval dynamics in context-dependent recall were explored via manipulations of external and internal context in two experiments. Participants were tested in either the same or different context as the material was learned in and correct recalls, errors, and recall latency measures were examined. In both experiments changes in context resulted…

Methodological aspects of using remote sensing data in oil and gas exploration

Energy Technology Data Exchange (ETDEWEB)

Kostriukov, M I; Tsarenko, P T

1981-01-01

The use of remote sensing data for oil and gas exploration in the central part of the western Siberian plain is considered. Techniques to increase the efficiency of interpretation of deep structures are examined, and the necessity of augmenting the development of automated interpretation systems is emphasized.

Drosophila increase exploration after visually detecting predators.

Directory of Open Access Journals (Sweden)

Miguel de la Flor

Full Text Available Novel stimuli elicit behaviors that are collectively known as specific exploration. These behaviors allow the animal to become more familiar with the novel objects within its environment. Specific exploration is frequently suppressed by defensive reactions to predator cues. Herein, we examine if this suppression occurs in Drosophila melanogaster by measuring the response of these flies to wild harvested predators. The flies used in our experiments have been cultured and had not lived under predator threat for multiple decades. In a circular arena with centrally-caged predators, wild type Drosophila actively avoided the pantropical jumping spider, Plexippus paykulli, and the Texas unicorn mantis, Phyllovates chlorophaena, indicating an innate defensive reaction to these predators. Interestingly, wild type Drosophila males also avoided a centrally-caged mock spider, and the avoidance of the mock spider became exaggerated when it was made to move within the cage. Visually impaired Drosophila failed to detect and avoid the Plexippus paykulli and the moving mock spider, while the broadly anosmic orco2 mutants were fully capable of detecting and avoiding Plexippus paykulli, indicating that these flies principally relied upon vison to perceive the predator stimuli. During early exploration of the arena, exploratory activity increased in the presence of Plexippus paykulli and the moving mock spider. The elevated activity induced by Plexippus paykulli disappeared after the fly had finished exploring, suggesting the flies were capable of habituating the predator cues. Taken together, these results indicate that despite being isolated from predators for decades Drosophila will visually detect these predators, retain innate defensive behaviors, respond by increasing exploratory activity in the arena rather than suppressing activity, and may habituate to normal predator cues.

A Longitudinal Examination of Parenting Behaviors and Perceived Discrimination Predicting Latino Adolescents' Ethnic Identity

Science.gov (United States)

Umana-Taylor, Adriana J.; Guimond, Amy B.

2010-01-01

Characteristics of the familial and societal context were examined as predictors of Latino adolescents' (N = 323; 49.5% female) ethnic identity. Consistent with previous work, familial ethnic socialization significantly predicted future levels of ethnic identity exploration, resolution, and affirmation for both male adolescents and female…

Examination of Spectral Transformations on Spectral Mixture Analysis

Science.gov (United States)

Deng, Y.; Wu, C.

2018-04-01

While many spectral transformation techniques have been applied on spectral mixture analysis (SMA), few study examined their necessity and applicability. This paper focused on exploring the difference between spectrally transformed schemes and untransformed scheme to find out which transformed scheme performed better in SMA. In particular, nine spectrally transformed schemes as well as untransformed scheme were examined in two study areas. Each transformed scheme was tested 100 times using different endmember classes' spectra under the endmember model of vegetation- high albedo impervious surface area-low albedo impervious surface area-soil (V-ISAh-ISAl-S). Performance of each scheme was assessed based on mean absolute error (MAE). Statistical analysis technique, Paired-Samples T test, was applied to test the significance of mean MAEs' difference between transformed and untransformed schemes. Results demonstrated that only NSMA could exceed the untransformed scheme in all study areas. Some transformed schemes showed unstable performance since they outperformed the untransformed scheme in one area but weakened the SMA result in another region.

ECONOMIC ANALYSIS OF EXPLORATION FOR AND EVELUATION OF MINERAL RESOURCES BASED ON FINANCIAL STATEMENTS

Directory of Open Access Journals (Sweden)

Andrey Nikolayevich Belonogov

2016-02-01

Full Text Available The article examines different techniques of economic analysis of exploration costs. The purpose of the article is to develop an approach to exploration costs economic analysis and to propose recommendations on improvement of an analytical value of Notes to Financial Statements. To achieve the purpose analysis, synthesis, deductive methods were employed. In course of the research we analyzed studies of J.C. Alfaro, A. Naggar, А.А. Muzychenko, E.V. Shevchenko, etc. We proposed an approach to economic analysis of resources sufficiency to complete exploration and evaluation works and to accounting for exploration and evaluation activities risks. We also proposed to supplement Notes to Financial Statements with additional relevant data. Results of the research can be used by investment analysts in order to enhance understanding of specific industry risks.

Kamstrupp's wow-effect: re-examined and expanded

Science.gov (United States)

King, Elizabeth M.; Dickmann, Ellyn M.; Johnson, Barbara Z.

2016-12-01

This review examines Anne Katrine Kamstrupp's article "The wow-effect in science teacher education; technology; sociomateriality." In the discussion below we explore three key areas of her ethnographic research. First, we reconsider Kamstrupp's article through the lens of technology as a pedagogical choice and philosophy. This is followed by our discussion of aspects of her study within the context of a basic understanding that entry-level pre-service teachers need to fully understand both the process of learning and scientific principles as these are important foundational factors in determining whether or not the wow-effect will occur as expected. Finally, our review team presents multiple areas in Kamstrupp's article as potential points for further elaboration.

Early Environmental Field Research Career Exploration: An Analysis of Impacts on Precollege Apprentices

Science.gov (United States)

Flowers, Susan K.; Beyer, Katherine M.; Pérez, Maria; Jeffe, Donna B.

2016-01-01

Research apprenticeships offer opportunities for deep understanding of scientific practice, transparency about research careers, and possible transformational effects on precollege youth. We examined two consecutive field-based environmental biology apprenticeship programs designed to deliver realistic career exploration and connections to…

Virtual Burglary: Exploring the Potential of Virtual Reality to Study Burglary in Action

NARCIS (Netherlands)

van Sintemaartensdijk, I.; van Prooijen, J-W.; van Gelder, J-L.; Otte, M.; Nee, Claire; Demetriou, Andrew

2016-01-01

Objectives: This article explores the potential of virtual reality (VR) to study burglary by measuring user responses on the subjective, physiological, and behavioral levels. Furthermore, it examines the influence of individual dispositions, such as sensation seeking and self-control, on behavior

An Exploration of Social Media Use among Multiply Minoritized LGBTQ Youth

Science.gov (United States)

Lucero, Alfie Leanna

2013-01-01

This study responds to a need for research in a fast-growing and significant area of study, that of exploring, understanding, and documenting the numerous ways that multiply marginalized LGBTQ youth between the ages of 14 and 17 use social media. The primary research question examined whether social media provide safe spaces for multiply…

Critical Media Literacy in Middle School: Exploring the Politics of Representation

Science.gov (United States)

Gainer, Jesse S.

2010-01-01

This article explores issues of critical media literacy with middle school students in an urban setting in the United States. The author focuses on data from a qualitative study engaging students in the reading and writing of video texts. The article examines intersections of issues relating to the "crisis of representation" in social science…

Virtual alternative to the oral examination for emergency medicine residents.

Science.gov (United States)

McGrath, Jillian; Kman, Nicholas; Danforth, Douglas; Bahner, David P; Khandelwal, Sorabh; Martin, Daniel R; Nagel, Rollin; Verbeck, Nicole; Way, David P; Nelson, Richard

2015-03-01

The oral examination is a traditional method for assessing the developing physician's medical knowledge, clinical reasoning and interpersonal skills. The typical oral examination is a face-to-face encounter in which examiners quiz examinees on how they would confront a patient case. The advantage of the oral exam is that the examiner can adapt questions to the examinee's response. The disadvantage is the potential for examiner bias and intimidation. Computer-based virtual simulation technology has been widely used in the gaming industry. We wondered whether virtual simulation could serve as a practical format for delivery of an oral examination. For this project, we compared the attitudes and performance of emergency medicine (EM) residents who took our traditional oral exam to those who took the exam using virtual simulation. EM residents (n=35) were randomized to a traditional oral examination format (n=17) or a simulated virtual examination format (n=18) conducted within an immersive learning environment, Second Life (SL). Proctors scored residents using the American Board of Emergency Medicine oral examination assessment instruments, which included execution of critical actions and ratings on eight competency categories (1-8 scale). Study participants were also surveyed about their oral examination experience. We observed no differences between virtual and traditional groups on critical action scores or scores on eight competency categories. However, we noted moderate effect sizes favoring the Second Life group on the clinical competence score. Examinees from both groups thought that their assessment was realistic, fair, objective, and efficient. Examinees from the virtual group reported a preference for the virtual format and felt that the format was less intimidating. The virtual simulated oral examination was shown to be a feasible alternative to the traditional oral examination format for assessing EM residents. Virtual environments for oral examinations

A longitudinal examination of parenting behaviors and perceived discrimination predicting Latino adolescents' ethnic identity.

Science.gov (United States)

Umaña-Taylor, Adriana J; Guimond, Amy B

2010-05-01

Characteristics of the familial and societal context were examined as predictors of Latino adolescents' (N = 323; 49.5% female) ethnic identity. Consistent with previous work, familial ethnic socialization significantly predicted future levels of ethnic identity exploration, resolution, and affirmation for both male adolescents and female adolescents, although the association was significantly stronger for female adolescents than male adolescents for exploration and resolution. Furthermore, for male adolescents, higher levels of familial ethnic socialization were significantly associated with a faster rate of growth for ethnic identity resolution. In addition, paternal warmth-support emerged as a significant longitudinal predictor of male adolescents', but not female adolescents', ethnic identity exploration. Finally, perceived discrimination was significantly associated with male adolescents', but not female adolescents', ethnic identity exploration and affirmation. Significant gender differences in the relations of interest highlight the need to consider variability in the process of ethnic identity formation by gender. 2010 APA, all rights reserved

The potential of space exploration for the fine arts

Science.gov (United States)

Mclaughlin, William I.

1993-01-01

Art provides an integrating function between the 'upper' and 'lower' centers of the human psyche. The nature of this function can be made more specific through the triune model of the brain. The evolution of the fine arts - painting, drawing, architecture, sculpture, literature, music, dance, and drama, plus cinema and mathematics-as-a-fine-art - are examined in the context of their probable stimulations by space exploration: near term and long term.

Crew systems: integrating human and technical subsystems for the exploration of space

Science.gov (United States)

Connors, M. M.; Harrison, A. A.; Summit, J.

1994-01-01

Space exploration missions will require combining human and technical subsystems into overall "crew systems" capable of performing under the rigorous conditions of outer space. This report describes substantive and conceptual relationships among humans, intelligent machines, and communication systems, and explores how these components may be combined to complement and strengthen one another. We identify key research issues in the combination of humans and technology and examine the role of individual differences, group processes, and environmental conditions. We conclude that a crew system is, in effect, a social cyborg, a living system consisting of multiple individuals whose capabilities are extended by advanced technology.

Strategic Implications of Human Exploration of Near-Earth Asteroids

Science.gov (United States)

Drake, Bret G.

2011-01-01

The current United States Space Policy [1] as articulated by the White House and later confirmed by the Congress [2] calls for [t]he extension of the human presence from low-Earth orbit to other regions of space beyond low-Earth orbit will enable missions to the surface of the Moon and missions to deep space destinations such as near-Earth asteroids and Mars. Human exploration of the Moon and Mars has been the focus of numerous exhaustive studies and planning, but missions to Near-Earth Asteroids (NEAs) has, by comparison, garnered relatively little attention in terms of mission and systems planning. This paper examines the strategic implications of human exploration of NEAs and how they can fit into the overall exploration strategy. This paper specifically addresses how accessible NEAs are in terms of mission duration, technologies required, and overall architecture construct. Example mission architectures utilizing different propulsion technologies such as chemical, nuclear thermal, and solar electric propulsion were formulated to determine resulting figures of merit including number of NEAs accessible, time of flight, mission mass, number of departure windows, and length of the launch windows. These data, in conjunction with what we currently know about these potential exploration targets (or need to know in the future), provide key insights necessary for future mission and strategic planning.

Youth Drug Offenders: An Examination of Criminogenic Risk and Juvenile Recidivism

OpenAIRE

Papp, Jordan; Campbell, Christina; Onifade, Eyitayo; Anderson, Valerie; Davidson, William; Foster, Dawn

2016-01-01

Understanding the criminogenic risk factors and treatment needs of juvenile drug offenders is important because of the myriad negative outcomes that befall juveniles that are involved in drugs. A widely used juvenile risk assessment tool, the Youth Level of Service/Case Management Inventory (YLS/CMI) was utilized to explore criminogenic risk factors and treatment needs to predict recidivism. Demographic differences between drug and nondrug offenders were also examined. Results ...

Exploring Elementary-School Students' Engagement Patterns in a Game-Based Learning Environment

Science.gov (United States)

Hsieh, Ya-Hui; Lin, Yi-Chun; Hou, Huei-Tse

2015-01-01

Unlike most research, which has primarily examined the players' interest in or attitude toward game-based learning through questionnaires, the purpose of this empirical study is to explore students' engagement patterns by qualitative observation and sequential analysis to visualize and better understand their game-based learning process. We…

Exploring Service Learning Outcomes in Students: A Mixed Methods Study for Nursing

Science.gov (United States)

Martin, John F.

2017-01-01

This mixed methods study exploring student outcomes of service learning experiences is inter-disciplinary, near the intersection of higher education research, moral development, and nursing. The specific problem examined in this study is that service learning among university students is utilized by educators, but largely without a full…

Exploring oral literacy in communication with hospice caregivers.

Science.gov (United States)

Wittenberg-Lyles, Elaine; Goldsmith, Joy; Oliver, Debra Parker; Demiris, George; Kruse, Robin L; Van Stee, Stephanie

2013-11-01

Low oral literacy has been identified as a barrier to pain management for informal caregivers who receive verbal instructions on pain medication and pain protocols. To examine recorded communication between hospice staff and informal caregivers and explore caregiver experiences. Using transcripts of interactions (n = 47), oral literacy features were analyzed by examining the generalized language complexity using the Flesch-Kincaid grading scale and the dialogue interactivity defined by talking turns and interaction time. Means for longitudinal follow-up measures on caregiver anxiety, quality of life, perception of pain management, knowledge and comfort providing pain medication, and satisfaction were examined to explore their relationship to oral literacy. Communication between team members and caregivers averaged a fourth-grade level on the Flesch-Kincaid scale, indicating that communication was easy to understand. Reading ease was associated (r = 0.67, P < 0.05) with caregiver understanding of and comfort with pain management. Perceived barriers to caregiver pain management were lower when sessions had increased use of passive sentences (r = 0.61, P < 0.01), suggesting that passive voice was not an accurate indicator of language complexity. Caregiver understanding and comfort with administering pain medications (r = -0.82, P < 0.01) and caregiver quality of life (r = -0.49, P < 0.05) were negatively correlated with dialogue pace. As the grade level of talk with caregivers and hospice teams increased, associated caregiver anxiety increased. Caregivers with higher anxiety also experienced greater difficulty in understanding pain medication and its management. Specific adjustments that hospice teams can make to improve caregiver experiences are identified. Copyright © 2013 U.S. Cancer Pain Relief Committee. Published by Elsevier Inc. All rights reserved.

Safety Characteristics in System Application Software for Human Rated Exploration

Science.gov (United States)

Mango, E. J.

2016-01-01

NASA and its industry and international partners are embarking on a bold and inspiring development effort to design and build an exploration class space system. The space system is made up of the Orion system, the Space Launch System (SLS) and the Ground Systems Development and Operations (GSDO) system. All are highly coupled together and dependent on each other for the combined safety of the space system. A key area of system safety focus needs to be in the ground and flight application software system (GFAS). In the development, certification and operations of GFAS, there are a series of safety characteristics that define the approach to ensure mission success. This paper will explore and examine the safety characteristics of the GFAS development.

Patients’ experience of outsourcing and care related to magnetic resonance examinations

Science.gov (United States)

Aspelin, Peter; Bergstrand, Lott; Blomqvist, Lennart

2014-01-01

Background Outsourcing radiological examinations from public university hospitals affects the patient, who has to attend a different clinic or hospital for the radiological examination. We currently have a limited understanding of how patients view outsourcing and their care related to MR examinations. Aim Aim. To examine the experiences of patients who are sent to private radiology units when their referrals for MR examinations are outsourced from a university hospital, as well as to explore factors which influence patient satisfaction regarding the quality of care related to the MR examination. Methods A group of patients (n = 160) referred for MR examinations and either examined at a university hospital or at an external private unit were interviewed. The interview was designed as a verbal questionnaire. Data were analyzed using Student’s t test, analysis of variance (ANOVA), and Pearson’s correlation. Results Sixty-nine percent of the patients could neither choose nor influence the location at which they were examined. For those who could, aspects that influenced the patient’s choice of radiology department were: short waiting time 79% (127/160), ease of traveling to the radiology department 68% (110/160), and short distance to their home or work 58% (93/160). For 40% (60/160) of the patients, a short time in the waiting room was related to a positive experience of the MR examination. Conclusion Conclusion. If patients were informed about outsourcing and could also choose where to have their examination, key factors contributing to patient satisfaction could be met even when MR examinations are outsourced. PMID:25142133

Robots and art exploring an unlikely symbiosis

CERN Document Server

Kroos, Christian; Stelarc, Stelarc

2016-01-01

The first compendium on robotic art of its kind, this book explores the integration of robots into human society and our attitudes, fears and hopes in a world shared with autonomous machines. It raises questions about the benefits, risks and ethics of the transformative changes to society that are the consequence of robots taking on new roles alongside humans. It takes the reader on a journey into the world of the strange, the beautiful, the uncanny and the daring – and into the minds and works of some of the world’s most prolific creators of robotic art. Offering an in-depth look at robotic art from the viewpoints of artists, engineers and scientists, it presents outstanding works of contemporary robotic art and brings together for the first time some of the most influential artists in this area in the last three decades. Starting from a historical review, this transdisciplinary work explores the nexus between robotic research and the arts and examines the diversity of robotic art, the encounter with rob...

Adolescents as Readers of Social Studies: Examining the Relationship between Youth's Everyday and Social Studies Literacies and Learning

Science.gov (United States)

Stockdill, Darin B.; Moje, Elizabeth B.

2013-01-01

In this paper, we examine the relationship between student engagement and social studies literacy, exploring the possible connections between students' reading interests and practices and social studies learning. With a sample of 802 secondary students from five schools in one urban community, we use complementary methods to explore survey and…

Exploring the effect of monetary incentives on user behavior in Online Sharing Platforms

NARCIS (Netherlands)

Lu, Yixin; Ou, Carol; Angelopoulos, Spyros

2018-01-01

We examine the impact of monetary incentives on user onboarding in online sharing platforms. Specifically, drawing upon the literature of monetary incentives, privacy, and consumer behavior, we conduct a randomized field experiment to explore users’ initial engagement and interaction with an online

Exploring the ethos of district nursing, 1885-1985.

Science.gov (United States)

Madsen, Wendy

2013-06-01

The history of district nursing in Australia explored in this paper reveals a continuity in the essential values held by district nurses for over a century. These nurses practised holistic, family-centred nursing from the very origins of district nursing service. The events surrounding the establishment of Community Health Centres in the 1970s challenged district nurses to reconsider their role, while at the same time reconfirming their essential ethos. These values that underpinned district nursing practice and challenges to these values are examined in this paper.

Neurobiología del autismo y TDAH mediante técnicas de neuroimagen: divergencias y convergencias

Science.gov (United States)

Proal, Erika; Olvera, Jorge González; Blancas, Aurea S.; Chalita, Pablo J.; Castellanos, F. Xavier

2013-01-01

En el área clínica algunos síntomas del trastorno por déficit de atención e hiperactividad (TDAH), se presentan en los pacientes con trastorno del espectro autista (TEA). Se ha demostrado que existen alteraciones en circuitos cerebrales que impactan en fallas cognitivas y de comportamiento específicas de cada uno de estos trastornos. Sin embargo, han sido poco estudiados los correlatos cerebrales que hay detrás tanto de las similitudes como de las diferencias sintomatológicas. En la presente revisión se analizaron los estudios meta-analíticos existentes estructurales y funcionales en TDAH y TEA. Por un lado, se observaron convergencias en circuitos como el dorsal atencional, de funciones ejecutivas, visual, somatomotor y circuito de activación por defecto. Estas similitudes posiblemente explican las manifestaciones comórbidas entre los trastornos como la falla en la integración de información, motricidad fina y procesos atencionales específicos. Por otro lado, específicamente en el TDAH se observan déficits en el circuito de recompensa y ventral atencional, sistemas involucrados en la medición de efectos de reforzamiento y monitoreo atencional. En TEA los circuitos más afectados fueron los implicados en procesos de cognición social y lenguaje. En conclusión, existen correlatos neuronales en TEA que explican las manifestaciones clínicas tanto convergentes como divergentes presentes en TDAH. PMID:23897144

Absceso intramedular en paciente con enfermedad de Rendu-Osler-Weber Spinal abscess in a patient with hereditary hemorrhagic telangiectasia

Directory of Open Access Journals (Sweden)

Lorena V Maldonado

2007-12-01

Full Text Available La enfermedad de Rendu-Osler-Weber es una enfermedad autosómica dominante que se manifiesta por telangiectasias en piel y mucosas y malformaciones arteriovenosas en diversos órganos. El compromiso neurológico puede ocurrir por la presencia de malformaciones arterio-venosas cerebrales, hemorragia intracraneal, y más habitualmente por accidentes cerebrovasculares isquémicos y abscesos cerebrales secundarios a embolia paradojal, en pacientes con malformaciones arteriovenosas pulmonares. El absceso intramedular es una entidad rara, inusual como complicación de la enfermedad de Rendu-Osler-Weber. Presentamos el caso de una mujer de 56 años de edad, con antecedentes familiares de enfermedad de Rendu-Osler- Weber, que ingresó a Terapia Intensiva con cuadriplejia aguda e hipoxemia, en quien se diagnosticó fístulas arteriovenosas pulmonares y un absceso intramedular cervical.Rendu-Osler-Weber syndrome is an autosomal dominant disorder characterized by multiple skin and mucosal telangiectasis and multiorgan arteriovenous malformations. Neurological manifestations may occur because of cerebral arteriovenous malformations, intracranial hemorrhage, and most commonly by ischemic stroke and brain abscess secondary to paradoxical embolization in patients with pulmonary arteriovenous malformations. Intramedullary abscess is a rare, unusual condition, in Rendu-Osler-Weber syndrome. We report the case of a 56 years old woman, with a familial history of Rendu-Osler-Weber syndrome, admitted to intensive care with acute quadriplegia and hypoxemia. Our diagnosis was pulmonary arteriovenous malformations and intramedullary abscess.

COMPARATIVO DE LOS ALGORITMOS DE DIMENSIÓN FRACTAL HIGUCHI, KATZ Y MULTIRESOLUCIÓN DE CONTEO DE CAJAS EN SEÑALES EEG BASADAS EN POTENCIALES RELACIONADOS POR EVENTOS

Directory of Open Access Journals (Sweden)

Santiago Fernández Fraga

Full Text Available La obtención de información por medio de la medición de señales registradas durante diferentes procesos o condiciones fisiológicas del cerebro es importante para poder desarrollar interfaces computacionales que traduzcan las señales eléctricas cerebrales a comandos computacionales de control. Un electroencefalograma (EEG registra la actividad eléctrica del cerebro en respuesta al recibir diferentes estímulos externos (potenciales por eventos. El análisis de estas señales permite identificar y distinguir estados específicos de la función fisiológica del cerebro. La Dimensión Fractal se ha utilizado como una herramienta para el análisis de formas de ondas biomédicas, en particular se ha utilizado para determinar la medida de la complejidad en series de tiempo generadas por EEG. El presente documento pretende analizar la base de datos HeadIT de series de tiempo biomédicas obtenidas por EEG a las cuales se obtendrán la FD por medio de los métodos Higuchi, Katz y Multi-resolución de Conteo de Cajas, que muestre la relación entre el método para la obtención de la Dimensión Fractal y la condición fisiológica de la señal basada en Potenciales Cerebrales Relacionados por Eventos.

JAXA's Space Exploration Scenario

Science.gov (United States)

Sato, N. S.

2018-04-01

Japan Aerospace Exploration Agency (JAXA) has been studying space exploration scenario, including human exploration for Japan since 2015, which encompasses goals, knowledge gap assessment, and architecture. assessment, and technology roadmap.

Husbands' and Wives' Relative Earnings: Exploring Variation by Race, Human Capital, Labor Supply, and Life Stage

Science.gov (United States)

Winslow-Bowe, Sarah

2009-01-01

Whereas much research has explored the causes and consequences of the gender wage gap, far less has examined earnings differentials within marriage. This article contributes to this literature by utilizing the 2000 wave of the 1979 National Longitudinal Survey of Youth to examine variation in husbands' and wives' relative income by race/ethnicity,…

A scenario for interstellar exploration and its financing

CERN Document Server

Bignami, Giovanni F

2013-01-01

This book develops a credible scenario for interstellar exploration and colonization. In so doing, it examines: • the present situation and prospects for interstellar exploration technologies; • where to go: the search for habitable planets; • the motivations for space travel and colonization; • the financial mechanisms required to fund such enterprises. The final section of the book analyzes the uncertainties surrounding the presented scenario. The purpose of building a scenario is not only to pinpoint future events but also to highlight the uncertainties that may propel the future in different directions. Interstellar travel and colonization requires a civilization in which human beings see themselves as inhabitants of a single planet and in which global governance of these processes is conducted on a cooperative basis. The key question is, then, whether our present civilization is ready for such an endeavor, reflecting the fact that the critical uncertainties are political and cultural in nature. I...

Alexithymia: a further exploration of its nomological network.

Science.gov (United States)

Vingerhoets, A J; Van Heck, G L; Grim, R; Bermond, B

1995-01-01

The present studies were designed in order to obtain a better understanding of the nomological network of the alexithymia concept. In study I, the links between alexithymia, coping, and self-rated health were explored. As predicted, strong negative correlations were found between alexithymia and the expression of emotions, daydreams and fantasies, and planful and rational actions. Contrary to expectations, no clear associations were found with self-reported health status. In study II, the focus was on links with personality, temperament, and self-reported (susceptibility to) homesickness. Although some correlations reached statistical significance, all were rather modest. The most remarkable finding was the independence of alexithymia and neuroticism. In study III, the associations between alexithymia and aspects of love experiences were examined, again yielding low correlations. It is concluded that alexithymia is relatively independent of temperament and personality. In addition, it is suggested that the association between alexithymia and the experience of positive emotions deserves further exploration.

Predicting Eating Disorder Group Membership: An Examination and Extension of the Sociocultural Model

Science.gov (United States)

Engler, Patricia A.; Crowther, Janis H.; Dalton, Ginnie; Sanftner, Jennifer L.

2006-01-01

The purpose of this research was to examine and extend portions of the sociocultural model of bulimia nervosa (Stice, E. (1994). Review of the evidence for a sociocultural model of bulimia nervosa and an exploration of the mechanisms of action. "Clinical Psychology Review," 14, 633-661; Stice, E., & Agras, W. S. (1998). Predicting onset and…

An Effective School Autonomy Model: Examining Headteachers' Job Satisfaction and Work-Related Stress

Science.gov (United States)

Nicolaidou Solomou, Galatia; Pashiardis, Petros

2016-01-01

Purpose: Although school autonomy has been a matter of great interest during the last decades and several relevant measures have been implemented toward this end, the relation between school autonomy and school effectiveness has not been examined thoroughly. The purpose of this paper is to explore this relation and to propose an effective school…

Bioinformatics: Cheap and robust method to explore biomaterial from Indonesia biodiversity

Science.gov (United States)

Widodo

2015-02-01

Indonesia has a huge amount of biodiversity, which may contain many biomaterials for pharmaceutical application. These resources potency should be explored to discover new drugs for human wealth. However, the bioactive screening using conventional methods is very expensive and time-consuming. Therefore, we developed a methodology for screening the potential of natural resources based on bioinformatics. The method is developed based on the fact that organisms in the same taxon will have similar genes, metabolism and secondary metabolites product. Then we employ bioinformatics to explore the potency of biomaterial from Indonesia biodiversity by comparing species with the well-known taxon containing the active compound through published paper or chemical database. Then we analyze drug-likeness, bioactivity and the target proteins of the active compound based on their molecular structure. The target protein was examined their interaction with other proteins in the cell to determine action mechanism of the active compounds in the cellular level, as well as to predict its side effects and toxicity. By using this method, we succeeded to screen anti-cancer, immunomodulators and anti-inflammation from Indonesia biodiversity. For example, we found anticancer from marine invertebrate by employing the method. The anti-cancer was explore based on the isolated compounds of marine invertebrate from published article and database, and then identified the protein target, followed by molecular pathway analysis. The data suggested that the active compound of the invertebrate able to kill cancer cell. Further, we collect and extract the active compound from the invertebrate, and then examined the activity on cancer cell (MCF7). The MTT result showed that the methanol extract of marine invertebrate was highly potent in killing MCF7 cells. Therefore, we concluded that bioinformatics is cheap and robust way to explore bioactive from Indonesia biodiversity for source of drug and another

Young Children's Identities Becoming: Exploring Agency in the Creation of Multimodal Literacies

Science.gov (United States)

Kuby, Candace R; Vaughn, Margaret

2015-01-01

This cross-case qualitative study draws on poststructural notions of identity to explore the relationship between multimodal literacies of young children and their becoming identities. Although research focuses on the products or texts of multiliteracies, more research is needed to examine shifting identities in the process of students creating.…

International exploration by independent

International Nuclear Information System (INIS)

Bertragne, R.G.

1992-01-01

Recent industry trends indicate that the smaller U.S. independents are looking at foreign exploration opportunities as one of the alternatives for growth in the new age of exploration. Foreign finding costs per barrel usually are accepted to be substantially lower than domestic costs because of the large reserve potential of international plays. To get involved in overseas exploration, however, requires the explorationist to adapt to different cultural, financial, legal, operational, and political conditions. Generally, foreign exploration proceeds at a slower pace than domestic exploration because concessions are granted by a country's government, or are explored in partnership with a national oil company. First, the explorationist must prepare a mid- to long-term strategy, tailored to the goals and the financial capabilities of the company; next, is an ongoing evaluation of quality prospects in various sedimentary basins, and careful planning and conduct of the operations. To successfully explore overseas also requires the presence of a minimum number of explorationists and engineers thoroughly familiar with the various exploratory and operational aspects of foreign work. Ideally, these team members will have had a considerable amount of on-site experience in various countries and climates. Independents best suited for foreign expansion are those who have been financially successful in domestic exploration. When properly approached, foreign exploration is well within the reach of smaller U.S. independents, and presents essentially no greater risk than domestic exploration; however, the reward can be much larger and can catapult the company into the 'big leagues.'

Buying versus exploring for reserves in the Canadian oil industry

International Nuclear Information System (INIS)

Sayer, F.

1992-01-01

The issue of a business strategy for Canadian oil companies focussed on either buying reserves or on exploration is examined. A measurement of the amount of merger and acquisition (M ampersand A) transactions vs the amount of exploration activity shows that the number of M ampersand A transactions has risen from 262 in 1989 to an estimated 1,500 in 1992. This sales activity has partly resulted from major companies selling assets to pay down debt. In the same period, the number of licensed exploration wells has decreased from 2,800 to 1,500. An analysis of statistics on the costs of acquisitions vs cost of finding and development shows acquisitions costs are lower in all cases. In addition, the median acquisition price has been falling steadily. Buying reserves has other advantages, including the fact that reserves can be added more quickly, lower risk, and readily available financing. Exploration, however, has its advantages, including the potential for very large reserve additions, higher tax deductions and incentives available, less competition from the industry, and low input costs. The acquisition vs exploration strategies are illustrated using the stock performance of two companies. If the acquisitions trend continues, there will be increases in the profitability of existing reserves, the number of companies, and tax receipts, However, in the long term there will be a drop in Canadian reserves and a significant reduction in the size of the industry. 14 figs., 2 tabs

The emotional labour of nursing 1: exploring the concept.

Science.gov (United States)

Gray, Benjamin

This is the first in a two-part series on emotional labour, a trained and individualised response to help manage the emotions of patients. It reviews relevant literature to define and explore this concept in nursing, and considers examples of emotional labour and makes recommendations for future policy and research. Part 2 of this research, to be published in next week's issue, examines routine aspects of emotional labour in nursing and the barriers to recognising this aspect of work.

Geochemical exploration for uranium

International Nuclear Information System (INIS)

1988-01-01

This Technical Report is designed mainly to introduce the methods and techniques of uranium geochemical exploration to exploration geologists who may not have had experience with geochemical exploration methods in their uranium programmes. The methods presented have been widely used in the uranium exploration industry for more than two decades. The intention has not been to produce an exhaustive, detailed manual, although detailed instructions are given for a field and laboratory data recording scheme and a satisfactory analytical method for the geochemical determination of uranium. Rather, the intention has been to introduce the concepts and methods of uranium exploration geochemistry in sufficient detail to guide the user in their effective use. Readers are advised to consult general references on geochemical exploration to increase their understanding of geochemical techniques for uranium

Implementing a Science-driven Mars Exploration Program

Science.gov (United States)

Garvin, J. B.

2001-12-01

NASA's newly restructured Mars Exploration Program (MEP) was developed on the basis of the goals, objectives, investigations, and prioritizations established by the Mars Exploration Payload Analysis Group (as summarized previously by Greeley et al., 2001). The underlying scientific strategy is linked to common threads which include the many roles water has played on and within Mars as a "system". The implementation strategy that has been adopted relies heavily on an ever-sharpening program of reconnaissance, beginning with the legacy of the Mars Global Surveyor, continuing with the multispectral and compositional observations of the Mars Odyssey orbiter, and extending to a first step in surface-based reconnaissance with the 2003 Mars Exploration Rovers. The results of MGS and Odyssey will serve to focus the trade space of localities where the record, for example, of persistent surface water may have been preserved in a mineralogical sense. The 2005 Mars Reconnaissance Orbiter will further downselect the subset of sites on Mars where evidence of depositional patterns and aqueous mineralogies (i.e., diagenetic minerals) are most striking at scales as fine as tens to hundreds of meters. Reconnaissance will move to the surface and shallow subsurface in 2007 with the Mars "Smart Lander" (MSL), at which time an extensive array of mobile scientific exploration tools will be used to examine a locality at 10km traverse scales, ultimately asking scientific questions which can be classed as paleobiological (i.e., life inference). Further orbital reconnaissance may be undertaken in 2009, perhaps involving targeted multi-wavelength SAR imaging, in anticipation of a precisely targeted Mars Sample Return mission as early as 2011. This sequence of core program MEP missions will be amplified by the selection of PI-led SCOUT missions, starting in 2007, and continuing every other Mars launch opportunity.

Maduración de la memoria de trabajo en niños, adolescentes y jóvenes adultos mediante potenciales relacionados con eventos

OpenAIRE

Barriga da Silva Paulino, Catarina Isabel

2015-01-01

La presente tesis investiga la maduración del mecanismo referente al procesamiento de la memoria de trabajo visual a lo largo del desarrollo. Para ello, se registraron conductual y electroencefalográficamente 170 sujetos, con edades comprendidas entre los 6 y los 26 años, usando un paradigma experimental del tipo Delayed Match-To-Sample. La muestra fue dividida en 5 grupos de edad (6-9, 10-13, 14-17, 18-21, 22-26), comparándolos con respecto a sus diferencias y/o similitudes cerebrales durant...

Manejo perioperatorio de tumores intracraneales: rol del neurocirujano

OpenAIRE

C. Polo-Torres; H.R. Alvis-Miranda; R. Villa-Delgado; L.R. Moscote-Salazar

2013-01-01

El manejo perioperatorio de los pacientes con tumores cerebrales es un reto para el neurocirujano y todo el equipo quirúrgico. El médico debe considerar factores como el tipo de tumor, la extensión de la enfermedad, el tratamiento recibido, la presencia de comorbilidades y el pronóstico de la patología. La ejecución correcta de todos los aspectos implicados en el manejo perioperatorio en pacientes con tumores intracraneales contribuirá a prolongar la vida y a mejorar la calidad de vida de los...

Adenovirus oncolíticos como estrategia terapéutica para tumores del sistema nervioso central

OpenAIRE

Vera-Cano, B. (Beatriz); Alonso M.M. (Marta Maria); Saez-Castresana, J. (Javier)

2018-01-01

La descripción de los distintos tumores cerebrales y sus alteraciones genéticas ha demostrado ser una herramienta importante para la mejora en el diagnóstico y clasificación de los pacientes que los padecen. Sin embargo, los avances en el tratamiento de estas enfermedades no han ido a la par y a pesar de todos los esfuerzos terapéuticos estos pacientes siguen sucumbiendo a la enfermedad. Los adenovirus oncolíticos diseñados para replicarse y destruir a las células tumorales representan una es...

La perspectiva neuroendocrinológica para abordar el problema de la obesidad y su relación con el síndrome metabólico

OpenAIRE

Rocío Rodríguez Valentín; Alfonso Carreón Rodríguez

2014-01-01

La obesidad es considerada como la primera epidemia no infecciosa en el mundo, y por su magnitud y trascendencia, como un problema prioritario de salud global. Su asociación al síndrome metabólico, en particular a diabetes, enferme - dades cardiovasculares y cerebrales, incrementa su importancia como factor de riesgo sanitario. En este contexto, además de los análisis sociales, económicos y epidemiológicos a los que está sujeto este padecimiento, existe un amplio campo de estudio en el áre...

Anatomía Cerebral del mono araña Ateles geoffroyi estudiada utilizando imágenes de resonancia magnética. Primer reporte: estudio comparativo con el cerebro humano Homo Sapiens

OpenAIRE

Chico-Ponce de León, Fernando; Platas-Neri, Diana; Muñoz-Delgado, Jairo; Santillán-Doherty, Ana-María; Arenas-Rosas, Rita; Trejo, David; Conde, Rubén; Ojeda-Flores, Rafael; Campos-Romo, Aurelio; Castro-Sierra, Eduardo; Cervantes, Juan José; Braun, Marc

2010-01-01

El objetivo del presente estudio cualitativo fue analizar los aspectos morfológicos de la anatomía cerebral interna utilizando imágenes de resonancia magnética (IRM) en dos especies de primates, El mono Araña (A. geoffroyi) y el humano (H. sapiens), tomando como base un estudio comparativo de las estructuras cerebrales de las dos especies, concentrándose primordialmente en el sistema límbico del cerebro del mono araña. Aunque es una especie común en el hemisferio occidental, es interesante pa...

Neuroimágenes en las alteraciones del sueño

Directory of Open Access Journals (Sweden)

Dr. M. Marcelo Gálvez

2013-05-01

Las técnicas de resonancia magnética funcional corresponden a pruebas similares a los test clínicos pero realizados al interior del resonador que permiten una evaluación de las áreas funcionales cerebrales. El PET-CT que utiliza principalmente glucosa radiactiva (18 FDG para visualizar el metabolismo cerebral. Este artículo revisa los principales hallazgos demostrados mediante imágenes estructurales y funcionales en los pacientes con Síndrome de Apnea Obstructiva del Sueño (SAOS, Narcolepsia e Insomnio idiopático.

Tumor de células de leydig, presentación con pubertad precoz

OpenAIRE

Araque, Maryuali; Uzcátegui, Lilia; Paoli, Mariela; Petrosino Tepedino, Pierina; Milano Molina, Melisse; Contreras, Adriana

2009-01-01

Objetivos: Presentar un caso de pubertad precoz secundaria a tumor de células de Leydig. Caso Clínico: Paciente preescolar masculino de 5 años, quien fue referido por presentar aparición de vello púbico, aumento de tamaño del pene, piel oleosa y crecimiento acelerado para la edad, sin antecedentes de traumatismo craneal o procesos infecciosos cerebrales. Al examen físico: peso 22,7kg y talla 117,2 cm, ambos en el percentil 97, masas musculares evidentes en tórax y miembros superio...

Tumor de células de Leydig, presentación con pubertad precoz

OpenAIRE

Maryuali, Araque; Uzcátegui, Lilia R.; Paoli, Mariela; Petrosino, Pierina; Milano, Melissa; Contreras, Adriana

2007-01-01

Objetivos: Presentar un caso de pubertad precoz secundaria a tumor de células de Leydig. Caso Clínico: Paciente preescolar masculino de 5 años, quien fue referido por presentar aparición de vello púbico, aumento de tamaño del pene, piel oleosa y crecimiento acelerado para la edad, sin antecedentes de traumatismo craneal o procesos infecciosos cerebrales. Al examen físico: peso 22,7kg y talla 117,2 cm, ambos en el percentil 97, masas musculares evidentes en tórax y miembros superiores, vello p...

Neurobiology of aggression and violence

OpenAIRE

Ortega Escobar, Joaquín; Alcázar Córcoles, Miguel Ángel

2016-01-01

La neurobiología de la agresión y la violencia es de interés para la psicología jurídica porque buenaparte de la conducta delictiva tiene componentes violentos. En esta revisión se definen en primer lugarambos conceptos, para diferenciar a continuación los tipos de agresión (impulsiva vs. instrumental) queaparecen en la literatura científica y finalmente analizar las estructuras nerviosas que según los estudiossobre lesiones cerebrales o de neuroimagen están asociadas con la agresión. Esta re...

Demencia y dolor Dementia and pain

OpenAIRE

J. Alaba; E. Arriola; A. Navarro; M. F. González; C. Buiza; C. Hernández; A. Zulaica

2011-01-01

El interés de los investigadores por el dolor, su evaluación e intervención en personas con demencia es creciente. Dada la tendencia demográfica a un incremento del envejecimiento poblacional, aumentando las patologías que presentan dolor y el avance en los conocimientos en el campo de las demencias, se identifican cambios que se producen en diferentes áreas cerebrales implicadas en el control del dolor. La presente revisión se centra en las modificaciones que se producen en la percepción del...

Implicaciones de las moléculas de adhesión celular neural en los efectos del estrés en procesos de aprendizaje y memoria en la rata

OpenAIRE

Merino Martín, José Joaquín

2002-01-01

Dado que las glicoproteínas denominadas moléculas de adhesión celular neural (NCAM, su forma polisializada, PSA-NCAM, y LI) desempeñan un papel importante en la consolidación de la memoria, se estudió su expresión en diferentes regiones cerebrales, en ratas entrenadas en el paradigma conductual del condicionamiento del miedo al contexto, bajo diferentes niveles de estrés intrínseco (ligado a la tarea de aprendizaje), y a diferentes tiempos post-entremamiento (12 y 24 horas). También se estudi...

La música binaural en el aprendizaje de los estudiantes universitarios. Lima 2015

OpenAIRE

Doria Palomino, Gian Carlo

2015-01-01

En este estudio titulado “La música binaural en el aprendizaje de los estudiantes universitarios Lima 2015”, tiene como objetivo demostrar que la música binaural puede mejorar el aprendizaje en los estudiantes del quinto ciclo de la carrera de administración de la Universidad Tecnológica del Perú. Esto como respuesta al problema: ¿En qué medida la estimulación de ondas cerebrales con música binaural" mejora el aprendizaje de los alumnos del quinto ciclo de la carrera de admi...

Diseño y desarrollo de una aplicación para navegar por Internet mediante sistemas Brain Computer Interface orientada a personas con grave discapacidad

OpenAIRE

Martínez Cagigal, Víctor

2014-01-01

El electroencefalograma (EEG) fue desarrollado por Hans Berger en 1929 y las ondas cerebrales, hasta entonces desconocidas, fueron investigadas durante el siglo XX como ayuda para el diagnóstico de la epilepsia o diversos trastornos del sueño. Durante este periodo de tiempo se especuló sobre utilizar las señales EEG para desarrollar un sistema de comunicación entre el cerebro y el medio sin la intervención de los mecanismos normales de los nervios y los músculos periféricos. Ese sistema surgi...

Nuevas formas de interactividad en videojuegos: los cascos EEG

OpenAIRE

Aniorte Llanes, Carlos

2017-01-01

Los videojuegos actuales cada vez nos ofrecen más formas y más variadas de interaccionar con ellos. La exploración de nuevos medios de interactividad en videojuegos amplia las perspectivas de juego y su aplicación. Por ello, este trabajo propone investigar estas nuevas formas de obtener entradas para la interacción, en concreto, las posibilidades de controlar los juegos mediante las ondas cerebrales. El público de este videojuego se centraría en personas que tienen un estado cognitivo normal,...

NEUROBIOLOGÍA DEL «VÍNCULO DE APEGO» Y EMBARAZO

OpenAIRE

José Manuel Giménez Amaya

2009-01-01

Las técnicas de neuroimagen funcional muestran como ciertas áreas cerebrales se activan, mientras otras se silencian, cuando una madre ve a su hija o a su hijo, u oye sus voces. Es el correlato de la emoción, que en presencia de su hijo, en diversas circunstancias, genera en la madre. El cerebro es organizado para mediar el complejo comportamiento maternal. Para ello, la expresión de los genes es orquestada por diferentes hormonas y factores neuroquímicos durante el embarazo. El comportamient...

Síndrome de Aicardi: Presentación de un caso clínico y revisión de la literatura.

OpenAIRE

Villarreal-Ybazeta, Miguel A.; Tirado-Chavarría, Felicitas A.; Calderón-Alarcón, Nila E.

2016-01-01

El síndrome de Aicardi (SA), es una rara enfermedad neurogenética, diagnosticada clínicamente por la triada clásica de agenesia del cuerpo calloso, espasmos infantiles y lagunas corioretinales.El objetivo de nuestro trabajo fue presentar el espectro clínico y la evolución de este trastorno en un caso. Reportamos una lactante de dos meses, de malformaciones cerebrales múltiples, que ingresa a emergencia por presentar crisis convulsivas. Durante la hospitalización, los hallazgos clínicos – elec...

A "Trojan horse" strategy to reverse drug-resistance in brain tumors

OpenAIRE

Pinzon-Daza, Martha L.

2014-01-01

Los gliomas malignos representan una de las formas más agresivas de los tumores del sistema nervioso central (SNC). De acuerdo con la clasificación de los tumores cerebrales de la Organización Mundial de la Salud (OMS), los astrocitomas han sido categorizados en cuatro grados, determinados por la patología subyacente. Es así como los gliomas malignos (o de alto grado) incluyen el glioma anaplásico (grado III) así como el glioblastoma multiforme (GBM, grado IV),estos últimos los más agresiv...

Evaluación de la expresión de las proteínas de choque térmico

OpenAIRE

Rodríguez Bernal, Ángela María

2009-01-01

En el tejido nervioso las neuronas son altamente sensibles a varios tipos de daño como la isquemia, la hipoxia la hipoglicemia, la infección y el trauma. Al respecto, también se sabe que la sensibilidad de las s neuronas a estos tipos de daño varía entre diferentes zonas cerebrales. En el tratamiento de patologías como aneurismas del sistema nerviosos, o durante procedimientos como la angioplastia intracraneana, con frecuencia es necesario realizar la oclusión temporal de una arteria lo que b...

NEUROCIENCIA Y ANESTESIA

OpenAIRE

Antonello Penna S., Dr., MD, PhD; Rodrigo Gutiérrez R., Dr., MD PhD(c)

2017-01-01

RESUMEN: Uno de los focos principales de la neurociencia es entender las funciones cerebrales superiores y cómo estas son inhibidas de manera reversible por los anestésicos generales. Por ello, la comprensión del mecanismo de acción de estos fármacos, que rutinariamente se utilizan en la práctica clínica, ha permitido avanzar enormemente en entender cómo se integra la información a nivel cerebral para establecer las nuevas memorias, la capacidad de reaccionar al medio externo y las bases de l...

El síndrome de Kallmann. Correlación fenotipo-genotípica.

OpenAIRE

García Piñero, Alfonso José

2015-01-01

El Síndrome de Kallmann (SK) es una enfermedad genética del desarrollo, que asocia un hipogonadismo hipogonadotrópico (HH) congénito con pérdida total (anosmia) o parcial (hiposmia) del olfato. La alteración olfativa es secundaria a la aplasia o hipoplasia de las estructuras olfatorias (bulbos, tractos y surcos cerebrales olfatorios). El HH se debe a la deficiencia en la hormona liberadora de gonadotropinas hipotalámica (GnRH) como resultado del fallo en la migración de las neuronas productor...

Estimulación visual en atención temprana a niños con alteraciones visuales de origen cortical

OpenAIRE

Gruñeiro Borrell, Irina

2016-01-01

Las lesiones cerebrales pediátricas (tanto adquiridas como congénitas) pueden producir múltiples dificultades visuales que hay que abordar tanto en el hogar como en el resto de entornos del niño. En la actualidad, se tiene un conocimiento bastante amplio de las características anatómicas de la visión, pero aún quedan por descubrir aspectos de la naturaleza, fisiología y desarrollo de las funciones visuales superiores. La discapacidad visual cerebral/cortical en niños se ha convertido en impor...

Isquemia cerebral focal transitoria en rata: caracterización y utilidad del modelo de la sutura intraluminal en el estudio de estrategias neuroprotectoras

OpenAIRE

Pérez Asensio, Fernando Jesús

2005-01-01

RESUMEN Los accidentes cerebrovasculares agudos (ictus cerebrales) son trastornos neurológicos originados por la disminución brusca del aporte sanguíneo cerebral (isquemia cerebral). La incidencia del ictus en España es de unos 200 casos por cada 100.000 habitantes, lo que le sitúa como la segunda causa de muerte, la primera de invalidez permanente y segunda de demencia. A excepción de la aplicación de la terapia trombolítica, actualmente no existe otro tratamiento eficaz del ictus en c...

LOCALIZACION Y EXPRESION DE FRUCTOSA-1,6-BISFOSFATASA EN CEREBRO DE ROEDORES

OpenAIRE

VELASQUEZ BOULET, ZAHADY DAFNEE

2011-01-01

Los carbohidratos son absorbidos en forma de glucosa desde el tracto intestinal, siendo la principal fuente de energía utilizada por las células cerebrales. Existen diferentes órganos especializados en la producción de glucosa, asegurando un suministro continuo a los tejidos y órganos. Por esto resulta de gran interés el hallazgo de reservas de glicógeno en cerebro, las que son movilizadas a una velocidad mayor que la observada en hígado o músculo. Una de las enzimas involucradas en el pro...

The role of personality, parents and peers in adolescents career exploration.

Science.gov (United States)

Kracke, Baerbel

2002-02-01

The role of individual characteristics, parental behaviours and peers for occupational exploration was examined in a sample of 192 German ninth graders (80 girls, 112 boys) from middle-track schools. The adolescents completed questionnaires at two points of measurement which were 6 months apart. The results showed that individual characteristics which reflected an active and constructive approach to developmental demands were correlated with more intense occupational exploration. Child-centred parental behaviours were also correlated positively with information-seeking behaviours. Moreover, parental behaviours predicted change in exploration over the observed time period. Concerning the role of peers which was often neglected in career development theory, the results showed that frequent talks with peers about career-related issues were significantly associated with the intensity of information-seeking behaviours and, at the same time, predicted an intensification of occupational exploration during the following 6-month period. The findings suggest that it would be fruitful to consider more thoroughly the role of peers in future research on adolescents' career development. Copyright 2002 Published by Elsevier Science Ltd on behalf of The Association for Professionals in Services for Adolescents.

Examining the Interplay Among Family, Culture, and Latina Teen Suicidal Behavior

OpenAIRE

Gulbas, Lauren E.; Zayas, Luis H.

2014-01-01

In this article, we explored the relationships among culture, family, and attempted suicide by U.S. Latinas. We analyzed qualitative interviews conducted with Latina teen suicide attempters (n = 10) and their parents. We also incorporated data collected from adolescents with no reported history of self-harm (n = 10) and their parents to examine why some individuals turned to suicide under similar experiences of cultural conflict. Our results revealed that Latina teens who attempted suicide la...

Exploring the Supply Side: Factors Related to Charter School Openings in NYC

Science.gov (United States)

Saultz, Andrew; Fitzpatrick, Dan; Jacobsen, Rebecca

2015-01-01

School choice policies have led to a proliferation of new schools opening. While economic theory suggests that new charters would open in high demand locations, limited work examines whether this is, indeed, occurring. Framing our study in geography, we explore both space factors and place factors as contrasting explanations for where new charters…

Parents with Psychosis: A Pilot Study Examining Self-Report Measures Related to Family Functioning.

Science.gov (United States)

Plant, Karen; Byrne, Linda; Barkla, Joanne; McLean, Duncan; Hearle, Jenny; McGrath, John

2002-01-01

Examines the utility of various self-report instruments related to family functioning in families where a parent has a psychotic disorder, and explores associations between these instruments and symptoms in the parent. There were significant associations between objective measures of negative symptoms and self-report scores related to problems in…

Friends Can Hurt You: Examining the Coexistence of Friendship and Bullying among Early Adolescents

Science.gov (United States)

Wei, Hsi-Sheng; Jonson-Reid, Melissa

2011-01-01

Friendship is typically assumed to be a protective factor for victims of school bullying, so the possibility of victimization by friends is rarely explored. This study examines the prevalence of positive affiliation between the victims and aggressors in verbal and physical bullying. Peer nomination inventories were used to assess the friendship…

Technological change and petroleum exploration in the Gulf of Mexico

International Nuclear Information System (INIS)

Managi, Shunsuke; Opaluch, J.J.; Jin Di; Grigalunas, T.A.

2005-01-01

We examine the impact of technological change on oil and gas exploration in the Gulf of Mexico from 1947 to 1998, using a unique micro-data set. An index variable for technological change is constructed to capture both the number and significance of technological innovations in the offshore industry over the study period. Empirical models of exploration-discovery and of drilling cost are used to assess the effect of technological change at both the field level and the regional level. Our results indicate that technological change played a very significant role in the offshore industry over the past 50 years, increasing reserves and lowering cost. Although depletion effect was dominant over the first two decades, the effect of technological change was able to offset that of resource depletion over the entire 50-year study period

The Momotombo Geothermal Field, Nicaragua: Exploration and development case history study

Energy Technology Data Exchange (ETDEWEB)

None

1982-07-01

This case history discusses the exploration methods used at the Momotombo Geothermal Field in western Nicaragua, and evaluates their contributions to the development of the geothermal field models. Subsequent reservoir engineering has not been synthesized or evaluated. A geothermal exploration program was started in Nicaragua in 1966 to discover and delineate potential geothermal reservoirs in western Nicaragua. Exploration began at the Momotombo field in 1970 using geological, geochemical, and geophysical methods. A regional study of thermal manifestations was undertaken and the area on the southern flank of Volcan Momotombo was chosen for more detailed investigation. Subsequent exploration by various consultants produced a number of geotechnical reports on the geology, geophysics, and geochemistry of the field as well as describing production well drilling. Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. This report presents the description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development. Our principal finding is that data developed at each stage were not sufficiently integrated to guide further work at the field, causing inefficient use of

Career Exploration in Adolescents: The Role of Anxiety, Attachment, and Parenting Style

Science.gov (United States)

Vignoli, Emmanuelle; Croity-Belz, Sandrine; Chapeland, Valerie; de Fillipis, Anne; Garcia, Martine

2005-01-01

The aim of the study was to examine the role of parent-adolescent attachment, adolescent anxiety and parenting style in the career exploration process and in career satisfaction. Three kinds of anxiety were considered: general trait anxiety, fear of failing in one's career and fear of disappointing one's parents. The participants were 283 French…

Exploring reforms while learning to teach science: Facilitating exploration of theory-practice relationships in a teacher education study group

Science.gov (United States)

Foster, Jacob G.

This dissertation inserts a new view into an old problem in teacher education. The study explores the theory-practice gap, the large distance between what preservice science teachers experience in schools, are able to enact, and are told they should hold themselves to in their practice. It does so by narrowing the focus of analysis to a secondary science study group and examining how the facilitator uses sociocultural constructivism to promote discussion. The analysis surfaces key communicative moves made by the facilitator and preservice teachers that yield fruitful discussion of theory-practice relationships. Additionally, the study's use of discourse analysis as a methodology and intertextuality as a conceptual framework opens new directions for applied sociolinguistic research and scholarship in science teacher education. Findings from the study focus on what was discussed and how explorations of theory-practice relationships were facilitated. Preservice teachers in the study group engaged in meaningful conversations about constructivist theory and its application to their students and teaching of science. They discussed many science education topics such as planning science lessons that actively engage students, assessment of content understanding, and management of content-based activities. Discussions of broader science education goals, including implementation of inquiry or development of collaborative communities, were not promoted. Examination of the facilitation illuminates a number of strategies found to be helpful in supporting these explorations. This study shows that facilitation can successfully support preservice teachers to construct understanding of social constructivist assumptions underlying the National Science Education Standards (NSES), as well as a few components of the Standards themselves. The focus on the underlying assumptions suggests that science teacher education should focus on these so that preservice teachers can build a strong

Graphic Presentation: An Empirical Examination of the Graphic Novel Approach to Communicate Business Concepts

Science.gov (United States)

Short, Jeremy C.; Randolph-Seng, Brandon; McKenny, Aaron F.

2013-01-01

Graphic novels have been increasingly incorporated into business communication forums. Despite potential benefits, little research has examined the merits of the graphic novel approach. In response, we engage in a two-study approach. Study 1 explores the potential of graphic novels to affect learning outcomes and finds that the graphic novel was…

Factors Inhibiting ESL Learners from Passing California High School Exit Examination: A Narrative Inquiry

Science.gov (United States)

Puente, Belinda

2017-01-01

The problem was that Hispanic English Second Language (ESL) students enrolled in the ESL program had consistently failed the California High School Exit Examination (CASHEE) in greater numbers than their cohorts. The purpose of this qualitative narrative inquiry was to explore the life stories of Hispanic ESL students in identifying the factors…

Exploration Laboratory Analysis

Science.gov (United States)

Krihak, M.; Ronzano, K.; Shaw, T.

2016-01-01

The Exploration Laboratory Analysis (ELA) project supports the Exploration Medical Capability (ExMC) risk to minimize or reduce the risk of adverse health outcomes and decrements in performance due to in-flight medical capabilities on human exploration missions. To mitigate this risk, the availability of inflight laboratory analysis instrumentation has been identified as an essential capability for manned exploration missions. Since a single, compact space-ready laboratory analysis capability to perform all exploration clinical measurements is not commercially available, the ELA project objective is to demonstrate the feasibility of emerging operational and analytical capability as a biomedical diagnostics precursor to long duration manned exploration missions. The initial step towards ground and flight demonstrations in fiscal year (FY) 2015 was the down selection of platform technologies for demonstrations in the space environment. The technologies selected included two Small Business Innovation Research (SBIR) performers: DNA Medicine Institutes rHEALTH X and Intelligent Optical Systems later flow assays combined with Holomics smartphone analyzer. The selection of these technologies were based on their compact size, breadth of analytical capability and favorable ability to process fluids in a space environment, among several factors. These two technologies will be advanced to meet ground and flight demonstration success criteria and requirements that will be finalized in FY16. Also, the down selected performers will continue the technology development phase towards meeting prototype deliverables in either late 2016 or 2017.

Virtual Alternative to the Oral Examination for Emergency Medicine Residents

Directory of Open Access Journals (Sweden)

McGrath, Jillian

2015-02-01

assessing EM residents. Virtual environments for oral examinations should continue to be explored, particularly since they offer an inexpensive, more comfortable, yet equally rigorous alternative. [West J Emerg Med. 2015;16(2:336–343.

Childhood and Adolescent Sexuality, Islam, and Problematics of Sex Education: A Call for Re-Examination

Science.gov (United States)

Tabatabaie, Alireza

2015-01-01

This paper offers a critical examination of the problematics of childhood and adolescent sexuality and sex education in an Islamic context. By exploring conceptions of (pre-marital) sexuality, childhood, and maturity/adulthood, it is suggested that: (i) "childhood" and "sexuality" do not coexist harmoniously in Islamic…

Exploring team working and shared leadership in multi-disciplinary cancer care.

Science.gov (United States)

Willcocks, Stephen George

2018-02-05

Purpose The purpose of this paper is to explore the relevance of shared leadership to multi-disciplinary cancer care. It examines the policy background and applies concepts from shared leadership to this context. It includes discussion of the implications and recommendations. Design/methodology/approach This is a conceptual paper examining policy documents and secondary literature on the topic. While it focuses on the UK National Health Services, it is also relevant to other countries given they follow a broadly similar path with regard to multi-disciplinary working. Findings The paper suggests that shared leadership is a possible way forward for multi-disciplinary cancer care, particularly as policy developments are supportive of this. It shows that a shared perspective is likely to be beneficial to the further development of multi-disciplinary working. Research limitations/implications Adopting shared leadership needs to be explored further using appropriate empirical research. Practical implications The paper offers comments on the implications of introducing shared leadership and makes recommendations including being aware of the barriers to its implementation. Originality/value The paper offers an alternative view on leadership in the health-care context.

Overview of the Human Exploration Research Analog (HERA)

Science.gov (United States)

Neigut, J.

2015-01-01

In 2013, the Human Research Program at NASA began developing a new confinement analog specifically for conducting research to investigate the effects of confinement on the human system. The HERA (Human Exploration Research Analog) habitat has been used for both 7 and 14 day missions to date to examine and mitigate exploration risks to enable safe, reliable and productive human space exploration. This presentation will describe how the Flight Analogs Project developed the HERA facility and the infrastructure to suit investigator requirements for confinement research and in the process developed a new approach to analog utilization and a new state of the art analog facility. Details regarding HERA operations will be discussed including specifics on the mission simulation utilized for the current 14-day campaign, the specifics of the facility (total volume, overall size, hardware), and the capabilities available to researchers. The overall operational philosophy, mission fidelity including timeline, schedule pressures and cadence, and development and implementation of mission stressors will be presented. Research conducted to date in the HERA has addressed risks associated with behavioral health and performance, human physiology, as well as human factors. This presentation will conclude with a discussion of future research plans for the HERA, including infrastructure improvements and additional research capabilities planned for the upcoming 30-day missions in 2016.

Undressing "health fashion": an examination of health-cause clothing and accessories.

Science.gov (United States)

Walker, Kandi L; Hart, Joy L; Gregg, Jennifer L; LaJoie, A Scott

2010-09-01

Today, fashion items such as rubber wristbands in various colors, pink ribbons, and red dresses represent different health-related causes and can be seen frequently across demographic groups. Complete with pithy slogans (e.g., "Go Red for Women"), these items are part of a larger "health fashion" trend--one that involves wearing, using, and displaying health-cause clothing and accessories. In this article, the authors explore recent interest in "health fashion," examining in particular its origins, effectiveness, and implications.

To Master or Perform? Exploring Relations between Achievement Goals and Conceptual Change Learning

Science.gov (United States)

Ranellucci, John; Muis, Krista R.; Duffy, Melissa; Wang, Xihui; Sampasivam, Lavanya; Franco, Gina M.

2013-01-01

Background: Research is needed to explore conceptual change in relation to achievement goal orientations and depth of processing. Aims: To address this need, we examined relations between achievement goals, use of deep versus shallow processing strategies, and conceptual change learning using a think-aloud protocol. Sample and Method:…

Same Program, Distinctive Development: Exploring the Biliteracy Trajectories of Two Dual Language Schools

Science.gov (United States)

Babino, Alexandra

2017-01-01

Using a mixed methods comparative case study, the researcher explored the dual language contexts at each school before examining the second- through fifth-grade Spanish and English reading biliteracy trajectories. While both campuses' students experienced positive trajectories toward biliteracy by the end of fifth grade, each campus was…

The Historical Development of Vaccine Technology: Exploring the Relationship between Science and Technology

Science.gov (United States)

Lee, Yeung Chung; Kwok, Ping Wai

2017-01-01

This paper examines the feasibility of using historical case studies to contextualise the learning of the nature of science and technology in a biology lesson. Through exploring the historical development of vaccine technology, students were expected to understand the complexity of the relationships between technology and science beyond the…

NASA's Solar System Exploration Research Virtual Institute: Science and Technology for Lunar Exploration

Science.gov (United States)

Schmidt, Greg; Bailey, Brad; Gibbs, Kristina

2015-01-01

The NASA Solar System Exploration Research Virtual Institute (SSERVI) is a virtual institute focused on research at the intersection of science and exploration, training the next generation of lunar scientists, and development and support of the international community. As part of its mission, SSERVI acts as a hub for opportunities that engage the larger scientific and exploration communities in order to form new interdisciplinary, research-focused collaborations. The nine domestic SSERVI teams that comprise the U.S. complement of the Institute engage with the international science and exploration communities through workshops, conferences, online seminars and classes, student exchange programs and internships. SSERVI represents a close collaboration between science, technology and exploration enabling a deeper, integrated understanding of the Moon and other airless bodies as human exploration moves beyond low Earth orbit. SSERVI centers on the scientific aspects of exploration as they pertain to the Moon, Near Earth Asteroids (NEAs) and the moons of Mars, with additional aspects of related technology development, including a major focus on human exploration-enabling efforts such as resolving Strategic Knowledge Gaps (SKGs). The Institute focuses on interdisciplinary, exploration-related science focused on airless bodies targeted as potential human destinations. Areas of study represent the broad spectrum of lunar, NEA, and Martian moon sciences encompassing investigations of the surface, interior, exosphere, and near-space environments as well as science uniquely enabled from these bodies. This research profile integrates investigations of plasma physics, geology/geochemistry, technology integration, solar system origins/evolution, regolith geotechnical properties, analogues, volatiles, ISRU and exploration potential of the target bodies. New opportunities for both domestic and international partnerships are continually generated through these research and

Uranium exploration in Ecuador

International Nuclear Information System (INIS)

Severne, B.; Penaherrera, P.F.; Fiallos, V.S.

1981-01-01

The 600-km segment of the Andean Cordillera in Ecuador includes zones that can be correlated, geologically, with uranium districts elsewhere in the Andes. It is believed that these essentially unexplored zones have the potential for economic uranium mineralization. Exploration activity to date has been limited, although it has involved both geochemical and radiometric techniques to evaluate geological concepts. Minor uranium occurrences (with chemical analyses up to 100 ppm) have been encountered, which provide further incentive to commence large-scale systematic exploration. It is recognized that a very large exploration budget and considerable technical expertise will be required to ensure exploration success. Consequently, participation by groups of proven capability from other countries will be sought for Ecuador's national exploration programme. (author)

The value of physical examination in mental health nursing.

Science.gov (United States)

Martin, Carolyn T

2016-03-01

This article explores the use of a physical examination assignment in a mental health general nursing clinical placement course that addresses the poor physical health of people with mental illness and the barriers traditionally impeding health care provision for this population. A descriptive qualitative approach utilizes inductive content analysis to investigate 145 student survey responses. The assignment assists student nurses in understanding that physical and mental well-being are intrinsically linked. Students report increased comfort performing a physical examination on patients with mental illness post assignment. Students' initial bias towards this population was minimized post the clinical assignment. Poor physical health is common among people with mental health problems. Many view the provision of care as a major public health issue. Nurses are the front line caregivers of mental health service consumers and are well positioned to assess their physical needs. Their assessment may be the first step in recognizing health care issues in this population. Copyright © 2015 Elsevier Ltd. All rights reserved.

Exploration of open educational resources in non-English speaking communities

OpenAIRE

Cristobal Cobo

2013-01-01

Over the last decade, open educational resources (OER) initiatives have created new possibilities for knowledge-sharing practices. This research examines how, where, and when OER are attracting attention in the higher education sector and explores to what extent the OER discussion has moved beyond the English-speaking world. This study analysed English, Spanish, and Portuguese OER queries over a long-term period (2007-2011). The data retrieval was conducted using four online platforms: two ac...

Strategy Implementation through Hierarchical Couplings in a Management Control Package: An Explorative Case Study

OpenAIRE

van der Kolk, Berend; Schokker, Tom

2016-01-01

We examine how couplings of management control (MC) elements help to implement an organization’s strategy. Despite prior research stating that couplings between MC elements form fruitful soil for further research, empirical studies in this area are still scarce. We draw on coupling theory to explore three hierarchical relations between MC elements, and examine how these couplings help to implement the organization’s strategy. We conducted a single case study in a medium-sized Dutch municipali...

Farside explorer

DEFF Research Database (Denmark)

Mimoun, David; Wieczorek, Mark A.; Alkalai, Leon

2012-01-01

the primary differentiation and evolution of the Moon, it can be continuously monitored from the Earth-Moon L2 Lagrange point, and there is a complete lack of reflected solar illumination from the Earth. Farside Explorer will exploit these properties and make the first radio-astronomy measurements from...... the most radio-quiet region of near-Earth space, determine the internal structure and thermal evolution of the Moon, from crust to core, and quantify impact hazards in near-Earth space by the measurement of flashes generated by impact events. The Farside Explorer flight system includes two identical solar......Farside Explorer is a proposed Cosmic Vision medium-size mission to the farside of the Moon consisting of two landers and an instrumented relay satellite. The farside of the Moon is a unique scientific platform in that it is shielded from terrestrial radio-frequency interference, it recorded...

Research-Based Teacher Education? Exploring the Meaning Potentials of Swedish Teacher Education

Science.gov (United States)

Alvunger, Daniel; Wahlström, Ninni

2018-01-01

In this article, we explore the meaning potentials of teacher education in terms of the significance of a research-based approach and the different pedagogic identities that such an approach implies. The study's aim is to examine the important factors for education to be considered research-based and to identify and analyse the research base of…

Exploring Visual Selective Attention towards Novel Stimuli in Alzheimer's Disease Patients

OpenAIRE

Sarah A. Chau; Nathan Herrmann; Moshe Eizenman; Jonathan Chung; Krista L. Lanctôt

2015-01-01

Background: Alzheimer's disease (AD) is associated with selective attention impairments, which could contribute to cognitive and functional deficits. Selective attention can be explored through examination of novelty preference. Aims: In this study, we quantified novelty preference in AD patients by measuring visual scanning behaviour using an eye tracking paradigm. Methods: Mild-to-moderate AD patients and elderly controls viewed slides containing novel and repeated images simultaneously. Th...

Exploring the everyday retail experience: The discourses of style and design

OpenAIRE

Pecoraro, Maria; Uusitalo, Outi

2014-01-01

In contrast to earlier studies focusing on spectacular retail store environments, this study concentrates on examining ordinary retail stores and everyday retail experiences. The article explores how different sorts of retail environments influence consumers' experience and behaviour. The research uses a comparative case study and employs the theoretical framework of geosemiotics. Investigating three different stores from the perspective of architectural style reveals that cultural meanings a...

Clinical history and physical examination skills - A requirement for radiographers?

International Nuclear Information System (INIS)

Snaith, Beverly A.; Lancaster, Anne

2008-01-01

Radiographer's roles have evolved with their scope broadening over the last 20 years culminating in the development of advanced and consultant posts. Yet one development has not been embraced, despite being inherent in medicine and a common extension of nurse and other allied health professionals' roles, is that of clinical assessment. This article explores the evolving role of the radiographer and discusses whether this should include skills in clinical history taking and physical examination. Issues for education and development will be addressed together with examples of current and potential roles

Human Resource Strategic Management in NPOs: An Explorative Study on Managers' Psychosocial Training

Science.gov (United States)

Benevene, Paula; Cortini, Michela

2010-01-01

Purpose: This explorative research aims at examining the social representation of psychosocial training in NPOs managers. Design/methodology/approach: An adopted multiple research approach was adopted to analyse a corpus of qualitative data. A detailed semi-structured interview was administered to 122 senior managers of as many Italian NPOs.…

Exploring the Differences of Undergraduate Students' Perceptual Learning Styles in International Business Study

Science.gov (United States)

Ding, Ning; Lin, Wei

2013-01-01

More than 45,000 international students are now studying for bachelor programs in The Netherlands. The number of Asian students increased dramatically in the past decade. The current research aims at examining the differences between Western European and Asian students' perceptual learning styles, and exploring the relationships between students'…

Understanding Alternative Food Networks: Exploring the Role of Food Supply Chains in Rural Development

NARCIS (Netherlands)

Renting, H.; Marsden, T.; Banks, J.

2003-01-01

In this paper we explore the development and incidence of alternative food networks within a European-wide context. By developing a consistent definition of short food supply chains, we address both the morphology and the dynamics of these, and then examine empirical evidence concerning their

A Qualitative Exploration of Management Education: Business School Offerings in Comparison to Employer Expectations

Science.gov (United States)

LaPrince, Shelly L.

2013-01-01

The exploratory qualitative research study explored management education business school offerings in comparison to employer expectations. Through the lens of alumni and human-resources personnel participants, the research examined the skills deemed as transferrable to the workplace and competencies that undergraduate-management education alumni…

International exploration by independents

International Nuclear Information System (INIS)

Bertagne, R.G.

1992-01-01

Recent industry trends indicate that the smaller U.S. independents are looking at foreign exploration opportunities as one of the alternatives for growth in the new age of exploration. The problems of communications and logistics caused by different cultures and by geographic distances must be carefully evaluated. A mid-term to long-term strategy tailored to the goals and the financial capabilities of the company should be prepared and followed by a careful planning of the operations. This paper addresses some aspects of foreign exploration that should be considered before an independent venture into the foreign field. It also provides some guidelines for conducting successful overseas operations. When properly assessed, foreign exploration is well within the reach of smaller U.S. independents and presents no greater risk than domestic exploration; the rewards, however, can be much larger. Furthermore, the Oil and Gas Journal surveys of the 300 largest U.S. petroleum companies show that companies with a consistent foreign exploration policy have fared better financially during difficult times

Reports and recommendations from COSPAR Planetary Exploration Committee (PEX) & International Lunar Exploration Working Group (ILEWG)

Science.gov (United States)

Ehrenfreund, Pascale; Foing, Bernard

2014-05-01

In response to the growing importance of space exploration, the objectives of the COSPAR Panel on Exploration (PEX) are to provide high quality, independent science input to support the development of a global space exploration program while working to safeguard the scientific assets of solar system bodies. PEX engages with COSPAR Commissions and Panels, science foundations, IAA, IAF, UN bodies, and IISL to support in particular national and international space exploration working groups and the new era of planetary exploration. COSPAR's input, as gathered by PEX, is intended to express the consensus view of the international scientific community and should ultimately provide a series of guidelines to support future space exploration activities and cooperative efforts, leading to outstanding scientific discoveries, opportunities for innovation, strategic partnerships, technology progression, and inspiration for people of all ages and cultures worldwide. We shall focus on the lunar exploration aspects, where the COSPAR PEX is building on previous COSPAR, ILEWG and community conferences. An updated COSPAR PEX report is published and available online (Ehrenfreund P. et al, COSPAR planetary exploration panel report, http://www.gwu.edu/~spi/assets/COSPAR_PEX2012.pdf). We celebrate 20 years after the 1st International Conference on Exploration and Utilisation of the Moon at Beatenberg in June 1994. The International Lunar Exploration Working Group (ILEWG) was established the year after in April 1995 at an EGS meeting in Hamburg, Germany. As established in its charter, this working group reports to COSPAR and is charged with developing an international strategy for the exploration of the Moon (http://sci.esa.int/ilewg/ ). It discusses coordination between missions, and a road map for future international lunar exploration and utilisation. It fosters information exchange or potential and real future lunar robotic and human missions, as well as for new scientific and

A Method for the Selection of Exploration Areas for Unconformity Uranium Deposits

International Nuclear Information System (INIS)

Harris, DeVerle P.; Zaluski, Gerard; Marlatt, James

2009-01-01

PAs so that the RAV of the exploration budget is maximized. Moreover, PORTFOLIO provides a means to examine the impact of magnitude of budget on the composition of the exploration portfolio and the optimum allocation of exploration to PAs that comprise the portfolio. Using fictitious data for five PAs, a numerical demonstration is provided of the use of PORTFOLIO to identify those PAs that comprise the optimum exploration portfolio and to optimally allocate the multiyear budget across portfolio PAs

Uranium reserves and exploration activity

International Nuclear Information System (INIS)

Meehan, R.J.

1975-01-01

The strategy that ERDA plans to employ regarding resource appraisal is outlined. All types of uranium occurrences will be evaluated as sources of domestic ore reserves. Industry's exploration efforts will be compiled. These data will include information on land acquisition and costs, footage drilled and costs, estimates of exploration activities and expenditures, exploration for non-sandstone deposits, exploration in non-established areas, and foreign exploration plans and costs. Typical data in each of these areas are given

Instructor Misbehavior and Forgiveness: An Examination of Student Communicative Outcomes in the Aftermath of Instructor Misbehavior

Science.gov (United States)

Vallade, Jessalyn I.; Malachowski, Colleen M.

2015-01-01

Using Attribution Theory as a theoretical framework, this study explored the role of forgiveness in impacting student nonverbal responsiveness, out-of-class communication (OCC), and perceptions of cognitive and affective learning following instructor misbehavior. Additionally, the role of instructor nonverbal immediacy was examined. Participants…

Leading from the Middle of the Organization: An Examination of Shared Leadership in Academic Libraries

Science.gov (United States)

Cawthorne, Jon E.

2010-01-01

Shared leadership theory recognizes leader influence throughout the organization, not just from the top down. This study explores how middle managers from 22 academic libraries in the Pacific West perceive their own agreement, participation and recognition of shared leadership. This survey and framework is the first to examine the extent shared…

Predictors of Academic Self-Handicapping and Achievement: Examining Achievement Goals, Classroom Goal Structures, and Culture

Science.gov (United States)

Urdan, Tim

2004-01-01

The purposes of this study were to examine the predictors and achievement consequences of academic self-handicapping and to explore cultural variations in the pursuit and effects of performance goals and perceived classroom performance goal structures. Data were collected in 2 consecutive academic years from a diverse sample of high school…

Symptom validity issues in the psychological consultative examination for social security disability.

Science.gov (United States)

Chafetz, Michael D

2010-08-01

This article is about Social Security Administration (SSA) policy with regard to the Psychological Consultative Examination (PCE) for Social Security Disability, particularly with respect to validation of the responses and findings. First, the nature of the consultation and the importance of understanding the boundaries and ethics of the psychologist's role are described. Issues particular to working with low-functioning claimants usually form a large part of these examinations. The psychologist must understand various forms of non-credible behavior during the PCE, and how malingering might be considered among other non-credible presentations. Issues pertaining to symptom validity testing in low-functioning claimants are further explored. SSA policy with respect to symptom validity testing is carefully examined, with an attempt to answer specific concerns and show how psychological science can be of assistance, particularly with evidence-based practice. Additionally, the nature and importance of techniques to avoid the mislabeling of claimants as malingerers are examined. SSA requires the use of accepted diagnostic techniques with which to establish impairment, and this article describes the implementation of that requirement, particularly with respect to validating the findings.

An Exploration of the Relationship between the Use of Methamphetamine and Prescription Drugs

Science.gov (United States)

Lamonica, Aukje K.; Boeri, Miriam

2012-01-01

This study examines patterns of use of prescription drugs and methamphetamine. We drew our sample from a study about 130 active and inactive methamphetamine users and focused on 16 participants with a recent history of methamphetamine and prescription drug use. We collected in-depth interviews to explore relationships in use trajectory patterns.…

The Primacy of Principles: Exploring Journalism Educators' Democratic Imperative to Do Good Work

Science.gov (United States)

Winters, Caryn L.

2013-01-01

By engaging in an interdisciplinary examination of the democracy-education relationship, this humanistic inquiry will identify and explore the principles that define journalism educators' special obligation to do good work. My thesis is prefaced on the notion that determining the principles that guide what it means for educators to do good work in…

Brief Mindfulness Meditation Group Training in Aphasia: Exploring Attention, Language and Psychophysiological Outcomes

Science.gov (United States)

Marshall, Rebecca Shisler; Laures-Gore, Jacqueline; Love, Kim

2018-01-01

Background: Stroke is currently the leading cause of long-term disability in adults in the United States. There is a need for accessible, low-cost treatments of stroke-related disabilities such as aphasia. Aims: To explore an intervention for aphasia utilizing mindfulness meditation (MM). This preliminary study examines the feasibility of teaching…

Exploring Community Philosophy as a Tool for Parental Engagement in a Primary School

Science.gov (United States)

Haines Lyon, Charlotte

2015-01-01

In this paper, I will reflect on the initial reconnaissance, action, and reflection cycle of my doctoral research, exploring Community Philosophy as a tool for critical parental engagement in a primary school (Elliot, 1991). I will examine how I reflexively engaged with my influence on participants, which then significantly influenced the framing…

Exploring the opinion of hemodialysis patients about their dialysis unit

OpenAIRE

Ahmed Farouk Donia; Mohamed Ahmed Elhadedy; Hanzada Mohamed El-Maghrabi; Mohamed Hamed Abbas; Mohamed Ashraf Foda

2015-01-01

Hemodialysis (HD) patients are subjected to a number of physical and mental stresses. Physicians might be unaware of some of these problems. We assessed our patients′ opinion about the service provided at the dialysis unit. Our unit has 89 patients on HD. A questionnaire exploring our patients′ opinion relative to the service provided was prepared. The patients were asked to fill-in the questionnaire in a confidential manner. Questionnaires were then collected and examined while unaware of pa...

Exploration and Exploitation of Victorian Science in Darwin's Reading Notebooks

OpenAIRE

Murdock, Jaimie; Allen, Colin; DeDeo, Simon

2015-01-01

Search in an environment with an uncertain distribution of resources involves a trade-off between exploitation of past discoveries and further exploration. This extends to information foraging, where a knowledge-seeker shifts between reading in depth and studying new domains. To study this decision-making process, we examine the reading choices made by one of the most celebrated scientists of the modern era: Charles Darwin. From the full-text of books listed in his chronologically-organized r...

Strategy Implementation through Hierarchical Couplings in a Management Control Package : An Explorative Case Study

NARCIS (Netherlands)

van der Kolk, Berend; Schokker, Tom

2016-01-01

We examine how couplings of management control (MC) elements help to implement an organization’s strategy. Despite prior research stating that couplings between MC elements form fruitful soil for further research, empirical studies in this area are still scarce. We draw on coupling theory to explore

An active-learning assignment requiring pharmacy students to write medicinal chemistry examination questions.

Science.gov (United States)

Kolluru, Srikanth

2012-08-10

To implement and assess the effectiveness of an assignment requiring doctor of pharmacy (PharmD) students to write examination questions for the medicinal chemistry sections of a pharmacotherapeutics course. Students were divided into groups of 5-6 and given detailed instructions and grading rubrics for writing multiple-choice examination questions on medicinal chemistry topics. The compiled student-written questions for each examination were provided to the entire class as a study aid. Approximately 5% of the student-written questions were used in course examinations. Student appreciation of and performance in the medicinal chemistry portion of the course was significantly better than that of the previous year's class. Also, students' responses on a qualitative survey instrument indicated that the assignment provided students' guidance on which concepts to focus on, helped them retain knowledge better, and fostered personal exploration of the content, which led to better performance on examinations. Adding an active-learning assignment in which students write examination questions for the medicinal chemistry portion of a pharmacotherapeutics course was an effective means of increasing students engagement in the class and knowledge of the course material.

Exploring empowerment in settings: mapping distributions of network power.

Science.gov (United States)

Neal, Jennifer Watling

2014-06-01

This paper brings together two trends in the empowerment literature-understanding empowerment in settings and understanding empowerment as relational-by examining what makes settings empowering from a social network perspective. Specifically, extending Neal and Neal's (Am J Community Psychol 48(3/4):157-167, 2011) conception of network power, an empowering setting is defined as one in which (1) actors have existing relationships that allow for the exchange of resources and (2) the distribution of network power among actors in the setting is roughly equal. The paper includes a description of how researchers can examine distributions of network power in settings. Next, this process is illustrated in both an abstract example and using empirical data on early adolescents' peer relationships in urban classrooms. Finally, implications for theory, methods, and intervention related to understanding empowering settings are explored.

A reflexive exploration of two qualitative data coding techniques

Directory of Open Access Journals (Sweden)

Erik Blair

2016-01-01

Full Text Available In an attempt to help find meaning within qualitative data, researchers commonly start by coding their data. There are a number of coding systems available to researchers and this reflexive account explores my reflections on the use of two such techniques. As part of a larger investigation, two pilot studies were undertaken as a means to examine the relative merits of open coding and template coding for examining transcripts. This article does not describe the research project per se but attempts to step back and offer a reflexive account of the development of data coding tools. Here I reflect upon and evaluate the two data coding techniques that were piloted, and discuss how using appropriate aspects of both led to the development of my final data coding approach. My exploration found there was no clear-cut ‘best’ option but that the data coding techniques needed to be reflexively-aligned to meet the specific needs of my project. This reflection suggests that, when coding qualitative data, researchers should be methodologically thoughtful when they attempt to apply any data coding technique; that they do not assume pre-established tools are aligned to their particular paradigm; and that they consider combining and refining established techniques as a means to define their own specific codes. DOI: 10.2458/azu_jmmss.v6i1.18772DOI: 10.2458/azu_jmmss.v6i1.18772

An Evaluation of Two Different Methods of Assessing Independent Investigations in an Operational Pre-University Level Examination in Biology in England.

Science.gov (United States)

Brown, Chris

1998-01-01

Explored aspects of assessment of extended investigation ("project") practiced in the operational examinations of The University of Cambridge Local Examinations Syndicate (UCLES) for the perspective of construct validity. Samples of the 1993 (n=333) and 1996 (n=259) biology test results reveal two methods of assessing the project. (MAK)

Exploring the Literature on Music Participation and Social Connectedness for Young People with Intellectual Disability: A Critical Interpretive Synthesis

Science.gov (United States)

Murphy, Melissa A. I.; McFerran, Katrina

2017-01-01

Background: This article explores the literature on social connectedness and music for young people with disability. It then critically examines the level of congruence between the reported literature to date and current rights-based disability studies discourse. Method: A critical interpretive synthesis was used to examine 27 articles referencing…

Exploration of the Moon to Enable Lunar and Planetary Science

Science.gov (United States)

Neal, C. R.

2014-12-01

address important science questions by determining the form of lunar surface volatiles. Science missions to examine the lunar interior and space weathering will also inform exploration systems with regard to the locations of large moonquakes and the radiation environment. Such examples highlight the Moon as an enabling Solar System science and exploration asset.

Terrigenous clastic depositional systems. Applications to petroleum, coal and uranium exploration

International Nuclear Information System (INIS)

Galloway, W.E.; Hobday, D.K.

1983-01-01

Two experts in fundamental and applied sedimentology and sedimentary economic geology provide a state-of-the-art summary of clastic depositional environments and their associated mineral fuel deposits. Utilizing a multidisciplinary approach, the authors focus on the recognition, mapping, and three-dimensional reconstruction of clastic deposits, primarily from subsurface data, examine the hydrology of sedimentary basins, and discuss applications of genetic facies analysis to mineral fuel resource appraisal, exploration, and development

Examining Citizens’ Contact to Local Public Institutions

Directory of Open Access Journals (Sweden)

Florina Bente

2013-08-01

Full Text Available Objective - This study aims to explore the communication process within local public administration as a determinant of citizens` satisfaction. Prior work - Several authors had examined if having contact with certain service providers will affect people’s attitudes toward the service quality, but the researchers have not focused yet on the effect of citizens` contact to local authorities on satisfaction. Approach - This research seeks to address this field using an exploratory approach. Following a quantitative methodological approach, a survey was applied to a sample of 380 citizens within Western Romanian. Findings - By analyzing data it was possible to determine citizen satisfaction and to assess its relationship with costumer contact. In addition it was revealed that in Crisana Region city hall is the most frequented local public institution. Implications – The results showed a negative effect of frequency of access to local authorities on overall customer satisfaction. The effect of citizens` contact to local authorities received less attention from the academic researchers, as a need in the literature is to expand this field. Value - This research is the first to specifically examine the contact to local authorities and the effect of frequency of addressing on citizen satisfaction within Crisana Region.

MGlu5 antagonism impairs exploration and memory of spatial and non-spatial stimuli in rats

DEFF Research Database (Denmark)

Christoffersen, Gert Rene Juul; Simonyi, Agnes; Schachtman, Todd R.

2008-01-01

and it was found that: 1) Locomotion during exploration of spatial environments and exploration time at novel objects were reduced by i.p. but not by prelimbic administration of MPEP, 2) spatial short-term memory was impaired in cross-maze and object discrimination was reduced after both types of administration, 3......) long-term retention of spatial conditioning in the cross-maze was inhibited after i.p. applications which 4) also inhibited spontaneous alternation performance during maze-exploration. Reduced exploratory locomotion and exploration time after i.p. injections may have contributed to the observed......Metabotropic glutamate receptor subtype 5 (mGlu5) has been implicated in memory processing in some but not all learning tasks.  The reason why this receptor is involved in some tasks but not in others remains to be determined.  The present experiments using rats examined effects of the mGlu5...

Exploring the New Narrative of Internet News

Directory of Open Access Journals (Sweden)

Ya-Hui Chen

2014-10-01

Full Text Available This paper demonstrates that digital tools provide opportunities for new storytelling techniques. To take full advantage of the new media resources and to establish an innovative news narrative structure, the existing research limit and the relationship between narrative and the media were examined. This paper progresses from a discussion on the narrative structure to how the plot of a story is influenced by its discourse, and then to how different media characteristics can change the structure and voice of the involved narrative. A new narrative structure that can be used to explore the hypertext and interactivity of Internet news is described. Finally, this paper discusses the cultivation of news storytelling in the digital age.

Revisiting the continuum hypothesis: toward an in-depth exploration of executive functions in korsakoff syndrome.

Science.gov (United States)

Brion, Mélanie; Pitel, Anne-Lise; Beaunieux, Hélène; Maurage, Pierre

2014-01-01

Korsakoff syndrome (KS) is a neurological state mostly caused by alcohol-dependence and leading to disproportionate episodic memory deficits. KS patients present more severe anterograde amnesia than Alcohol-Dependent Subjects (ADS), which led to the continuum hypothesis postulating a progressive increase in brain and cognitive damages during the evolution from ADS to KS. This hypothesis has been extensively examined for memory but is still debated for other abilities, notably executive functions (EF). EF have up to now been explored by unspecific tasks in KS, and few studies explored their interactions with memory. Exploring EF in KS by specific tasks based on current EF models could thus renew the exploration of the continuum hypothesis. This paper will propose a research program aiming at: (1) clarifying the extent of executive dysfunctions in KS by tasks focusing on specific EF subcomponents; (2) determining the differential EF deficits in ADS and KS; (3) exploring EF-memory interactions in KS with innovative tasks. At the fundamental level, this exploration will test the continuum hypothesis beyond memory. At the clinical level, it will propose new rehabilitation tools focusing on the EF specifically impaired in KS.

Revisiting the continuum hypothesis: towards an in-depth exploration of executive functions in Korsakoff syndrome.

Directory of Open Access Journals (Sweden)

Mélanie eBrion

2014-07-01

Full Text Available Korsakoff syndrome (KS is a neurological state mostly caused by alcohol-dependence and leading to disproportionate episodic memory deficits. KS patients present more severe anterograde amnesia than alcohol-dependent subjects (ADS, which led to the continuum hypothesis postulating a progressive increase in brain and cognitive damages during the evolution from ADS to KS. This hypothesis has been extensively examined for memory but is still debated for other abilities, notably executive functions (EF. EF have up to now been explored by unspecific tasks in KS, and few studies explored their interactions with memory. Exploring EF in KS by specific tasks based on current EF models could thus renew the exploration of the continuum hypothesis. This paper will propose a research program aiming at: (1 clarifying the extent of executive dysfunctions in KS by tasks focusing on specific EF subcomponents; (2 determining the differential EF deficits in ADS and KS; (3 exploring EF-memory interactions in KS with innovative tasks. At the fundamental level, this exploration will test the continuum hypothesis beyond memory. At the clinical level, it will propose new rehabilitation tools focusing on the EF specifically impaired in KS.

A Cultural Immersion Field Experience: Examining Pre-Service Music Teachers' Beliefs about Cultural Differences

Science.gov (United States)

VanDeusen, Andrea J.

2017-01-01

With the intent of informing music teacher education practices and developing more culturally responsive and relevant teachers, the purpose of this research was to explore pre-service music teachers' understandings of culture and diversity, and to examine the impact of a short-term cultural immersion field experience on pre-service music teachers'…

New NASA Technologies for Space Exploration

Science.gov (United States)

Calle, Carlos I.

2015-01-01

NASA is developing new technologies to enable planetary exploration. NASA's Space Launch System is an advance vehicle for exploration beyond LEO. Robotic explorers like the Mars Science Laboratory are exploring Mars, making discoveries that will make possible the future human exploration of the planet. In this presentation, we report on technologies being developed at NASA KSC for planetary exploration.

Human Exploration of the Solar System by 2100

Science.gov (United States)

Litchford, Ronald J.

2017-01-01

It has been suggested that the U.S., in concert with private entities and international partners, set itself on a course to accomplish human exploration of the solar system by the end of this century. This is a strikingly bold vision intended to revitalize the aspirations of HSF in service to the security, economic, and scientific interests of the nation. Solar system distance and time scales impose severe requirements on crewed space transportation systems, however, and fully realizing all objectives in support of this goal will require a multi-decade commitment employing radically advanced technologies - most prominently, space habitats capable of sustaining and protecting life in harsh radiation environments under zero gravity conditions and in-space propulsion technologies capable of rapid deep space transits with earth return, the subject of this paper. While near term mission destinations such as the moon and Mars can be accomplished with chemical propulsion and/or high power SEP, fundamental capability constraints render these traditional systems ineffective for solar system wide exploration. Nuclear based propulsion and alternative energetic methods, on the other hand, represent potential avenues, perhaps the only viable avenues, to high specific power space transport evincing reduced trip time, reduced IMLEO, and expanded deep space reach. Here, very long term HSF objectives for solar system wide exploration are examined in relation to the advanced propulsion technology solution landscape including foundational science, technical/engineering challenges, and developmental prospects.

Late stillbirth post mortem examination in New Zealand: Maternal decision-making.

Science.gov (United States)

Cronin, Robin S; Li, Minglan; Wise, Michelle; Bradford, Billie; Culling, Vicki; Zuccollo, Jane; Thompson, John M D; Mitchell, Edwin A; McCowan, Lesley M E

2018-03-05

For parents who experience stillbirth, knowing the cause of their baby's death is important. A post mortem examination is the gold standard investigation, but little is known about what may influence parents' decisions to accept or decline. We aimed to identify factors influencing maternal decision-making about post mortem examination after late stillbirth. In the New Zealand Multicentre Stillbirth Study, 169 women with singleton pregnancies, no known abnormality at recruitment, and late stillbirth (≥28weeks gestation), from seven health regions were interviewed within six weeks of birth. The purpose of this paper was to explore factors related to post mortem examination decision-making and the reasons for declining. We asked women if they would make the same decision again. Maternal decision to decline a post mortem (70/169, 41.4%) was more common among women of Māori (adjusted odds ratio (aOR) 4.99 95% confidence interval (CI) 1.70-14.64) and Pacific (aOR 3.94 95% CI 1.47-10.54) ethnicity compared to European, and parity two or more (aOR 2.95 95% CI 1.14-7.62) compared to primiparous. The main reason for declining was that women 'did not want baby to be cut'. Ten percent (7/70) who declined said they would not make this decision again. No woman who consented regretted her decision. Ethnic differences observed in women's post mortem decision-making should be further explored in future studies. Providing information of the effect of post mortem on the baby's body and the possible emotional benefits of a post mortem may assist women faced with this decision in the future. © 2018 The Royal Australian and New Zealand College of Obstetricians and Gynaecologists.

The driving forces of stability. Exploring the nature of long-term bureaucracy-interest group interactions

NARCIS (Netherlands)

Braun, C.H.J.M.

2013-01-01

This article explores the nature of long-term interactions between bureaucrats and interest groups by examining two behavioral logics associated with stability in public policy making. In addition to the implicit short-term strategic choices that usually feature in resource-exchange explanations of

Newborn Irritability Moderates the Association between Infant Attachment Security and Toddler Exploration and Sociability

Science.gov (United States)

Stupica, Brandi; Sherman, Laura J.; Cassidy, Jude

2011-01-01

This longitudinal investigation of 84 infants examined whether the effect of 12-month attachment on 18- and 24-month exploration and sociability with unfamiliar adults varied as a function of newborn irritability. As expected, results revealed an interaction between attachment (secure vs. insecure) and irritability (highly irritable vs. moderately…

Identity Exploration in the Dating Domain: The Role of Attachment Dimensions and Parenting Practices

Science.gov (United States)

Pittman, Joe F.; Kerpelman, Jennifer L.; Soto, Janet B.; Adler-Baeder, Francesca M.

2012-01-01

We examined relations among perceived parenting practices (support and psychological control), attachment dimensions for romantic relationships (anxiety and avoidance) and exploration of the dating identity among actively dating adolescents in two high school aged samples. In the all female sample of Study 1 (n = 653) and the gender balanced…

Combining computational analyses and interactive visualization for document exploration and sensemaking in jigsaw.

Science.gov (United States)

Görg, Carsten; Liu, Zhicheng; Kihm, Jaeyeon; Choo, Jaegul; Park, Haesun; Stasko, John

2013-10-01

Investigators across many disciplines and organizations must sift through large collections of text documents to understand and piece together information. Whether they are fighting crime, curing diseases, deciding what car to buy, or researching a new field, inevitably investigators will encounter text documents. Taking a visual analytics approach, we integrate multiple text analysis algorithms with a suite of interactive visualizations to provide a flexible and powerful environment that allows analysts to explore collections of documents while sensemaking. Our particular focus is on the process of integrating automated analyses with interactive visualizations in a smooth and fluid manner. We illustrate this integration through two example scenarios: an academic researcher examining InfoVis and VAST conference papers and a consumer exploring car reviews while pondering a purchase decision. Finally, we provide lessons learned toward the design and implementation of visual analytics systems for document exploration and understanding.

The relationship between internal medicine residency graduate performance on the ABIM certifying examination, yearly in-service training examinations, and the USMLE Step 1 examination.

Science.gov (United States)

Kay, Cynthia; Jackson, Jeffrey L; Frank, Michael

2015-01-01

To explore the relationship between United States Medical Licensing Examination (USMLE) Step 1 scores, yearly in-service training exam (ITE) scores, and passing the American Board of Internal Medicine certifying examination (ABIM-CE). The authors conducted a retrospective database review of internal medicine residents from the Medical College of Wisconsin from 2004 through 2012. Residents' USMLE Step 1, ITE, and ABIM-CE scores were extracted. Pearson rho, chi-square, and logistic regression were used to determine whether relationships existed between the scores and if Step 1 and ITE scores correlate with passing the ABIM-CE. There were 241 residents, who participated in 728 annual ITEs. There were Step 1 scores for 195 (81%) residents and ABIM-CE scores for 183 (76%). Step 1 and ABIM-CE scores had a modest correlation (rho: 0.59), as did ITE and ABIM-CE scores (rho: 0.48-0.67). Failing Step 1 or being in the bottom ITE quartile during any year of testing markedly increased likelihood of failing the boards (Step 1: relative risk [RR]: 2.4; 95% CI: 1.0-5.9; first-year residents' RR: 1.3; 95% CI: 1.0-1.6; second-year residents' RR: 1.3; 95% CI: 1.1-1.5; third-year residents' RR: 1.3; 95% CI: 1.1-1.5). USMLE Step 1 and ITE scores have a modest correlation with board scores. Failing Step 1 or scoring in the bottom quartile of the ITE increased the risk of failing the boards. What effective intervention, if any, program directors may use with at-risk residents is a question deserving further research.

BURNOUT AMONG STAFF NURSES : Examining the causes, coping strategies and prevention

OpenAIRE

Ndawula, Maria

2016-01-01

Burnout occurs as a result of widening gap between the individual and demands of the job. Nursing is inevitably a demanding and stressful job in a complex organizational set-ting. Extra stressors like burnout have a severe impact on nurses’ well-being, patient safety, and the health organization as a whole. The main aim and objective of this study is to ex-amine the prevalence of burnout among staff nurses, explore the causes and what can be done to manage and prevent burnout among staff nurs...

Motivational valence alters memory formation without altering exploration of a real-life spatial environment

Science.gov (United States)

Hashemi, Jordan; Gans, Lee K.; Lerebours, Laura; Clement, Nathaniel J.; Vu, Mai-Anh T.; Sapiro, Guillermo; Heller, Nicole E.; Adcock, R. Alison

2018-01-01

Volitional exploration and learning are key to adaptive behavior, yet their characterization remains a complex problem for cognitive science. Exploration has been posited as a mechanism by which motivation promotes memory, but this relationship is not well-understood, in part because novel stimuli that motivate exploration also reliably elicit changes in neuromodulatory brain systems that directly alter memory formation, via effects on neural plasticity. To deconfound interrelationships between motivation, exploration, and memory formation we manipulated motivational state prior to entering a spatial context, measured exploratory responses to the context and novel stimuli within it, and then examined motivation and exploration as predictors of memory outcomes. To elicit spontaneous exploration, we used the physical space of an art exhibit with affectively rich content; we expected motivated exploration and memory to reflect multiple factors, including not only motivational valence, but also individual differences. Motivation was manipulated via an introductory statement framing exhibit themes in terms of Promotion- or Prevention-oriented goals. Participants explored the exhibit while being tracked by video. They returned 24 hours later for recall and spatial memory tests, followed by measures of motivation, personality, and relevant attitude variables. Promotion and Prevention condition participants did not differ in terms of group-level exploration time or memory metrics, suggesting similar motivation to explore under both framing contexts. However, exploratory behavior and memory outcomes were significantly more closely related under Promotion than Prevention, indicating that Prevention framing disrupted expected depth-of-encoding effects. Additionally, while trait measures predicted exploration similarly across framing conditions, traits interacted with motivational framing context and facial affect to predict memory outcomes. This novel characterization of

Motivational valence alters memory formation without altering exploration of a real-life spatial environment.

Directory of Open Access Journals (Sweden)

Kimberly S Chiew

Full Text Available Volitional exploration and learning are key to adaptive behavior, yet their characterization remains a complex problem for cognitive science. Exploration has been posited as a mechanism by which motivation promotes memory, but this relationship is not well-understood, in part because novel stimuli that motivate exploration also reliably elicit changes in neuromodulatory brain systems that directly alter memory formation, via effects on neural plasticity. To deconfound interrelationships between motivation, exploration, and memory formation we manipulated motivational state prior to entering a spatial context, measured exploratory responses to the context and novel stimuli within it, and then examined motivation and exploration as predictors of memory outcomes. To elicit spontaneous exploration, we used the physical space of an art exhibit with affectively rich content; we expected motivated exploration and memory to reflect multiple factors, including not only motivational valence, but also individual differences. Motivation was manipulated via an introductory statement framing exhibit themes in terms of Promotion- or Prevention-oriented goals. Participants explored the exhibit while being tracked by video. They returned 24 hours later for recall and spatial memory tests, followed by measures of motivation, personality, and relevant attitude variables. Promotion and Prevention condition participants did not differ in terms of group-level exploration time or memory metrics, suggesting similar motivation to explore under both framing contexts. However, exploratory behavior and memory outcomes were significantly more closely related under Promotion than Prevention, indicating that Prevention framing disrupted expected depth-of-encoding effects. Additionally, while trait measures predicted exploration similarly across framing conditions, traits interacted with motivational framing context and facial affect to predict memory outcomes. This novel

Motivational valence alters memory formation without altering exploration of a real-life spatial environment.

Science.gov (United States)

Chiew, Kimberly S; Hashemi, Jordan; Gans, Lee K; Lerebours, Laura; Clement, Nathaniel J; Vu, Mai-Anh T; Sapiro, Guillermo; Heller, Nicole E; Adcock, R Alison

2018-01-01

Volitional exploration and learning are key to adaptive behavior, yet their characterization remains a complex problem for cognitive science. Exploration has been posited as a mechanism by which motivation promotes memory, but this relationship is not well-understood, in part because novel stimuli that motivate exploration also reliably elicit changes in neuromodulatory brain systems that directly alter memory formation, via effects on neural plasticity. To deconfound interrelationships between motivation, exploration, and memory formation we manipulated motivational state prior to entering a spatial context, measured exploratory responses to the context and novel stimuli within it, and then examined motivation and exploration as predictors of memory outcomes. To elicit spontaneous exploration, we used the physical space of an art exhibit with affectively rich content; we expected motivated exploration and memory to reflect multiple factors, including not only motivational valence, but also individual differences. Motivation was manipulated via an introductory statement framing exhibit themes in terms of Promotion- or Prevention-oriented goals. Participants explored the exhibit while being tracked by video. They returned 24 hours later for recall and spatial memory tests, followed by measures of motivation, personality, and relevant attitude variables. Promotion and Prevention condition participants did not differ in terms of group-level exploration time or memory metrics, suggesting similar motivation to explore under both framing contexts. However, exploratory behavior and memory outcomes were significantly more closely related under Promotion than Prevention, indicating that Prevention framing disrupted expected depth-of-encoding effects. Additionally, while trait measures predicted exploration similarly across framing conditions, traits interacted with motivational framing context and facial affect to predict memory outcomes. This novel characterization of

Examination Management and Examination Malpractice: The Nexus

Science.gov (United States)

Ogunji, James A.

2011-01-01

Examination malpractice or cheating has become a global phenomenon. In different countries of the world today, developed and developing, academic dishonesty especially cheating in examinations has heightened and taken frightening dimension. In many countries of the world this phenomenon has become a serious matter of concern that has left many…

Exploration du territoire identitaire dans les installations de Fred Wilson Exploring Identity Territory in Fred Wilson’s Installations

Directory of Open Access Journals (Sweden)

Claudine Armand

2009-10-01

Full Text Available This article examines Fred Wilson’s plastic approach and attempts to define what is specific about the work of this conceptual Afro-American artist born in New York City in 1954. Ever since his first installations, Fred Wilson has been exploring various spaces of representation, museums, art galleries, and other alternative spaces. He has created in situ works and has always worked in strategic spaces chosen in relation to their social, historical and political context. Selected to represent the United States at the 2003 Venice Biennale, Fred Wilson, like other artists today, questions history, art, and representation. The construction of identity and ethnic relations underlie his heterogeneous, complex, disturbing, and thought-provoking work endowed with political and aesthetic undertones.

Using Qualitative Methods to Explore Non-Disclosure: The Example of Self-Injury

Directory of Open Access Journals (Sweden)

Jo Borrill PhD

2012-09-01

Full Text Available Attempts to investigate non-disclosure are hampered by the very aspect being examined, namely an unwillingness to disclose non-disclosure. Although qualitative interviews may be considered to be an appropriate method for in-depth exploration of personal experiences, a lack of anonymity and the desire to conform to what is perceived to be socially acceptable limit its application in sensitive research. The current study, using a qualitative approach, addresses non-disclosure in the context of non-suicidal self-injury. Twenty-five young adults from diverse cultural backgrounds were interviewed in depth about their perceptions of self-injury, without the researchers asking directly whether the participants had ever self-harmed. Two techniques were used to enhance discussion within the qualitative interview: participants were invited to (a discuss three hypothetical scenarios and (b explore alternative interpretations of statistical data on patterns of self-harm. Key themes emerged regarding disclosure, gender issues, and culturally shaped concerns about the consequences of disclosure. The contributions of each element of the interview to understanding participants' perceptions are highlighted and alternative methodological approaches for examining disclosure are discussed.

How does ANWR exploration affect OPEC behavior? - A simulation study of an open-loop cournot-nash game

International Nuclear Information System (INIS)

Yang, Zili

2008-01-01

Exploring petroleum reserves in the Alaskan Arctic National Wildlife Refuge (ANWR) has been proposed to reduce the dependence on foreign oil and to ease the energy shortage in the United States. To investigate the impacts of the ANWR exploration on strategic behavior of OPEC members, a calibrated dynamic model of oligopolistic competition and cartel collusion in the U.S. petroleum market is built in this paper. Numerical simulations on an open-loop game are used here to examine the scope and magnitude of strategic interactions between OPEC's decisions and ANWR exploration. The simulation results show that OPEC's strategic postures have much stronger effects on the U.S. petroleum market than the ANWR exploration. The simulations in this paper indicate that preventing cartel collusion by OPEC is more effective than the ANWR exploration in alleviating short petroleum supplies of the United States in the near future. (author)

Does Changing Examiner Stations During UK Postgraduate Surgery Objective Structured Clinical Examinations Influence Examination Reliability and Candidates' Scores?

Science.gov (United States)

Brennan, Peter A; Croke, David T; Reed, Malcolm; Smith, Lee; Munro, Euan; Foulkes, John; Arnett, Richard

2016-01-01

Objective structured clinical examinations (OSCE) are widely used for summative assessment in surgery. Despite standardizing these as much as possible, variation, including examiner scoring, can occur which may affect reliability. In study of a high-stakes UK postgraduate surgical OSCE, we investigated whether examiners changing stations once during a long examining day affected marking, reliability, and overall candidates' scores compared with examiners who examined the same scenario all day. An observational study of 18,262 examiner-candidate interactions from the UK Membership of the Royal College of Surgeons examination was carried at 3 Surgical Colleges across the United Kingdom. Scores between examiners were compared using analysis of variance. Examination reliability was assessed with Cronbach's alpha, and the comparative distribution of total candidates' scores for each day was evaluated using t-tests of unit-weighted z scores. A significant difference was found in absolute scores differences awarded in the morning and afternoon sessions between examiners who changed stations at lunchtime and those who did not (p design and examiner experience in surgical OSCEs and beyond. Copyright © 2016 Association of Program Directors in Surgery. Published by Elsevier Inc. All rights reserved.

Aspectos Neuropsicológicos en Pacientes Diagnosticados de Tumores Cerebrales

Directory of Open Access Journals (Sweden)

Ana Sanz Cortés

2011-01-01

Full Text Available El presente estudio pretende definir el papel del tumor en el rendimiento neuropsicológico de pacientes con sospecha radiológica de glioma, siendo la valoración en el momento inicial de la enfermedad, previo a la resección quirúrgica. La muestra incluyó 29 pacientes (18 hombres y 11 mujeres con una edad media de 54 años. A todos ellos se les ha aplicado una batería neuropsicológica para valorar atención, memoria, habilidades visoconstructivas, organización visual, lenguaje y funciones ejecutivas. Los resultados arrojan que más del 50% de la muestra, presenta puntuaciones centiles por debajo de 40 o por debajo del punto de corte establecido, para todas las variables, excepto en orientación y recuerdo verbal a corto plazo. El grupo de pacientes con gliomas de bajo grado presenta un mejor rendimiento en habilidades de planificación y seguimiento de una estrategia determinada, con respecto a los pacientes con glioma de alto grado. No se observan diferencias en el rendimiento neuropsicológico en relación al hemisferio afectado. Además, dado que la edad es una variable que influye en el rendimiento neuropsicológico, se identifico que ésta era la encargada de explicar las diferencias entre pacientes con glioma de alto y bajo grado, no siendo así en cuanto al hemisferio afectado.

Apport de la tomodensitometrie (TDM) cerebrale chez le sujet adulte ...

African Journals Online (AJOL)

Methodology : It is about a descriptive and analytical retrospective study over one 36 months period (Mars 1998 at Mars 2001) relating to 68 files of adult patients HIV positive, having made the cerebral. CT with the CHU-Campus or the ... years at the men and 38.5 years among women. The lesions found with cerebral ...

La bellezza aurea. Risposta cerebrale alle sculture classiche e rinascimentali

Directory of Open Access Journals (Sweden)

Cinzia Di Dio

2010-12-01

Full Text Available Esiste una base biologica oggettiva nell’esperienza del bello nell’arte? Oppure, l’esperienza estetica è interamente soggettiva? Usando la tecnica della risonanza magnetica funzionale, abbiamo affrontato questa domanda presentando a degli osservatori naïve allo studio dell’arte immagini di capolavori di sculture Classiche e Rinascimentali. Utilizzando la proporzione come variabile indipendente, abbiamo creato due gruppi di stimoli: uno composto da immagini di sculture originali; l’altro, da una versione modificata delle stesse immagini. Gli stimoli sono stati presentati in tre condizioni: osservazione, giudizio estetico e giudizio di proporzione. Nella condizione di osservazione, i volontari dovevano osservare le immagini con lo stesso stato mentale che avrebbero avuto se fossero stati in un museo. Nelle altre due condizioni, i volontari dovevano dare un giudizio estetico e di proporzione delle stesse immagini. Sono stati eseguiti due tipi di analisi: uno, che ha contrastato le risposte cerebrali alle sculture canoniche e modificate; ed uno, che messo a contrasto le sculture “esteticamente piacevoli” e quelle “esteticamente non piacevoli”, secondo il giudizio espresso in modo esplicito da ciascun volontario. Il risultato più interessante ha evidenziato, durante l’osservazione delle sculture originali, rispetto a quelle modificate, l’attivazione dell’insula destra e di alcune aree corticali laterali e mediali (il giro occipitale laterale, il precuneo e aree prefrontali. L’attivazione dell’insula era particolarmente evidente durante la condizione di osservazione. Inoltre, si è osservato che, quando i volontari dovevano dare un giudizio estetico esplicito, le immagini giudicate esteticamente piacevoli attivavano selettivamente l’amigdala destra rispetto a quelle giudicate esteticamente non piacevoli. Dati i risultati, abbiamo concluso che, negli osservatori naïve, il senso del bello è mediato da due processi non mutualmente esclusivi: uno basato sull’attivazione congiunta di gruppi di neuroni corticali, evocata dai parametri intrinseci degli stimoli e l’insula (bellezza oggettiva; l’altro, basato sull’attivazione dell’amigdala, evocata dalle esperienze emozionali proprie di ciascun individuo (bellezza soggettiva.

A Preliminary Examination of Identity Exploration and Commitment among Polish Adolescents with and without Motor Disability: Does Disability Constitute Diversity in Identity Development?

Science.gov (United States)

Dominiak-Kochanek, Monika

2016-01-01

The aim of this study was to define whether, and to what extent identity formation in late adolescence is disability specific. Ninety-eight adolescents participated in this study, including 43 students with motor disability and 55 students without disability. Identity exploration and commitment was measured by the Utrecht-Groningen Identity…

Injuries in Children with Autism Spectrum Disorder: Study to Explore Early Development (SEED)

Science.gov (United States)

DiGuiseppi, Carolyn; Levy, Susan E.; Sabourin, Katherine R.; Soke, Gnakub N.; Rosenberg, Steven; Lee, Li-Ching; Moody, Eric; Schieve, Laura A.

2018-01-01

This study examined caregiver-reported medically-attended injuries among 30-68 month old children with autism spectrum disorder (ASD) compared to general population (POP) and non-ASD developmental disorders (DD) controls in the Study to Explore Early Development. Injuries were common in ASD cases (32.3%) as well as POP (30.2%) and DD (27.8%)…

Schooling, work satisfaction and productivity: an examination of Jeremy Bentham.

Science.gov (United States)

Lyons, R G

1998-01-01

This paper examines the ethical dimensions of work productivity and work satisfaction. This issue is explored by looking at the ethical theory of Jeremy Bentham. He argues that work satisfaction is so highly subjective and personal that we can school people to experience work satisfaction when in the most distasteful jobs. Bentham argues that, from the perspective of the principle of utility, there is nothing wrong with schooling some people to experience work satisfaction from what seems like distasteful work. This paper suggests that Bentham's theory justifies class relationship and flies in the face of the notion of equality of job opportunity.

Global education implications of the foreign pharmacy graduate equivalency examination.

Science.gov (United States)

Alkhateeb, Fadi M; Clauson, Kevin A; Latif, David A; Al-Rousan, Rabaa M

2010-06-15

Although the Foreign Pharmacy Graduate Equivalency Examination (FPGEE) is not intended to measure educational outcomes or institutional effectiveness, it may be a reliable and valid criterion to assess the quality or success of international pharmacy programs. This comprehensive review describes the evolution and historical milestones of the FPGEE, along with trends in structure, administration, and passing rates, and the impact of country of origin on participant performance. Similarities between the FPGEE and the Pharmacy Curriculum Outcomes Assessment (PCOA) are also explored. This paper aims to provide a global prospective and insight for foreign academic institutions into parameters for evaluating their students' educational capabilities.

Employment as a Social Determinant of Health: A Systematic Review of Longitudinal Studies Exploring the Relationship between Employment Status and Physical Health

Science.gov (United States)

Hergenrather, Kenneth C.; Zeglin, Robert J.; McGuire-Kuletz, Maureen; Rhodes, Scott D.

2015-01-01

Purpose: To explore employment as a social determinant of health through examining the relationship between employment status and physical health. Method: The authors explored the causal relationship between employment status and physical health through conducting a systematic review of 22 longitudinal studies conducted in Finland, France, the…

Visual explorer facilitator's guide

CERN Document Server

Palus, Charles J

2010-01-01

Grounded in research and practice, the Visual Explorer™ Facilitator's Guide provides a method for supporting collaborative, creative conversations about complex issues through the power of images. The guide is available as a component in the Visual Explorer Facilitator's Letter-sized Set, Visual Explorer Facilitator's Post card-sized Set, Visual Explorer Playing Card-sized Set, and is also available as a stand-alone title for purchase to assist multiple tool users in an organization.

An Examination of the Multi-Faceted Motivation System in Healthy Young Adults

Directory of Open Access Journals (Sweden)

Susana Da Silva

2018-05-01

Full Text Available Background: Amotivation is a prevalent symptom in schizophrenia (SZ and depression (MDD, and is linked to poor functional outcomes in affected individuals. Conceptualizations of motivation have outlined a multi-faceted construct comprised of reward responsiveness, reward expectancy, reward valuation, effort valuation, and action selection/preference-based decision making. To date, findings from studies utilizing variable-centered approaches to examining isolated facets of motivation in SZ and MDD have been inconsistent. Thus, the present study adopted a person-centered approach, and comprehensively examined the reward system in a non-clinical sample in an attempt to explore potential subtypes of motivation impairments, while minimizing the effects of illness-related confounds.Methods: Ninety-six healthy undergraduate students were evaluated for amotivation, schizotypal traits, depressive symptoms, and cognition, and administered objective computerized tasks to measure the different facets of motivation. Cluster analysis was performed to explore subgroups of individuals based on similar motivation task performance. Additionally, correlational analyses were conducted in order to examine inter-relationships between motivation facets, and relations between clinical measures and facets of motivation.Results: Cluster analysis identified two subgroups of individuals with differential motivation performance profiles. Correlational analyses revealed that reward responsiveness was associated with amotivation, depressive symptoms, and negative schizotypy. Further, significant inter-correlations were found between reward responsiveness and reward expectancy, as well as between reward valuation and effort valuation.Conclusions: Our results mark important steps forward in understanding motivation in a non-clinical sample, and guide future dimensional and comprehensive analyses of the multi-faceted reward system. It remains to be seen whether these patterns of

An Examination of the Multi-Faceted Motivation System in Healthy Young Adults.

Science.gov (United States)

Da Silva, Susana; Apatsidou, Areti; Saperia, Sarah; Siddiqui, Ishraq; Jeffay, Eliyas; Voineskos, Aristotle N; Daskalakis, Zafiris J; Remington, Gary; Zakzanis, Konstantine K; Foussias, George

2018-01-01

Background: Amotivation is a prevalent symptom in schizophrenia (SZ) and depression (MDD), and is linked to poor functional outcomes in affected individuals. Conceptualizations of motivation have outlined a multi-faceted construct comprised of reward responsiveness, reward expectancy, reward valuation, effort valuation, and action selection/preference-based decision making. To date, findings from studies utilizing variable-centered approaches to examining isolated facets of motivation in SZ and MDD have been inconsistent. Thus, the present study adopted a person-centered approach, and comprehensively examined the reward system in a non-clinical sample in an attempt to explore potential subtypes of motivation impairments, while minimizing the effects of illness-related confounds. Methods: Ninety-six healthy undergraduate students were evaluated for amotivation, schizotypal traits, depressive symptoms, and cognition, and administered objective computerized tasks to measure the different facets of motivation. Cluster analysis was performed to explore subgroups of individuals based on similar motivation task performance. Additionally, correlational analyses were conducted in order to examine inter-relationships between motivation facets, and relations between clinical measures and facets of motivation. Results: Cluster analysis identified two subgroups of individuals with differential motivation performance profiles. Correlational analyses revealed that reward responsiveness was associated with amotivation, depressive symptoms, and negative schizotypy. Further, significant inter-correlations were found between reward responsiveness and reward expectancy, as well as between reward valuation and effort valuation. Conclusions: Our results mark important steps forward in understanding motivation in a non-clinical sample, and guide future dimensional and comprehensive analyses of the multi-faceted reward system. It remains to be seen whether these patterns of results will

International exploration by independents

International Nuclear Information System (INIS)

Bertagne, R.G.

1991-01-01

Recent industry trends indicate that the smaller US independents are looking at foreign exploration opportunities as one of the alternatives for growth in the new age of exploration. It is usually accepted that foreign finding costs per barrel are substantially lower than domestic because of the large reserve potential of international plays. To get involved overseas requires, however, an adaptation to different cultural, financial, legal, operational, and political conditions. Generally foreign exploration proceeds at a slower pace than domestic because concessions are granted by the government, or are explored in partnership with the national oil company. First, a mid- to long-term strategy, tailored to the goals and the financial capabilities of the company, must be prepared; it must be followed by an ongoing evaluation of quality prospects in various sedimentary basins, and a careful planning and conduct of the operations. To successfully explore overseas also requires the presence on the team of a minimum number of explorationists and engineers thoroughly familiar with the various exploratory and operational aspects of foreign work, having had a considerable amount of onsite experience in various geographical and climatic environments. Independents that are best suited for foreign expansion are those that have been financially successful domestically, and have a good discovery track record. When properly approached foreign exploration is well within the reach of smaller US independents and presents essentially no greater risk than domestic exploration; the reward, however, can be much larger and can catapult the company into the big leagues

Uranium exploration

International Nuclear Information System (INIS)

De Voto, R.H.

1984-01-01

This paper is a review of the methodology and technology that are currently being used in varying degrees in uranium exploration activities worldwide. Since uranium is ubiquitous and occurs in trace amounts (0.2 to 5 ppm) in virtually all rocks of the crust of the earth, exploration for uranium is essentially the search of geologic environments in which geologic processes have produced unusual concentrations of uranium. Since the level of concentration of uranium of economic interest is dependent on the present and future price of uranium, it is appropriate here to review briefly the economic realities of uranium-fueled power generation. (author)

Moving the Weber fraction: the perceptual precision for moment of inertia increases with exploration force

NARCIS (Netherlands)

Debats, N.B.; Kingma, I.; Beek, P.J.; Smeets, J.B.J.

2012-01-01

How does the magnitude of the exploration force influence the precision of haptic perceptual estimates? To address this question, we examined the perceptual precision for moment of inertia (i.e., an object's "angular mass") under different force conditions, using the Weber fraction to quantify

Policy Poison or Promise: Exploring the Dual Nature of California School District Collective Bargaining Agreements

Science.gov (United States)

Strunk, Katharine O.

2012-01-01

Purpose: This study examines policies set in the collective bargaining agreements (CBAs) negotiated between teachers' unions and school boards and explores what kinds of districts have contract provisions that restrict district administrators, enhance administrative flexibility, and/or improve teachers' professional work lives and that have…

An Exploration of Relationships between Leadership and Student Citizenship Outcomes in Cyprus Middle Schools

Science.gov (United States)

Savvides, Vassos; Pashiardis, Petros

2016-01-01

Purpose: The main purpose of this study was to explore direct and indirect relationships between Leadership and Student Citizenship Outcomes in Cyprus middle schools. In the case of indirect effects the mediating role of School Academic Optimism and Instructional Quality was examined. Method: The specific study adopted a value-added quantitative…

Open Innovation, Triple Helix and Regional Innovation Systems: Exploring CATAPULT Centres in the UK

Science.gov (United States)

Kerry, Christopher; Danson, Michael

2016-01-01

Through the lens of UK CATAPULT Centres this conceptual paper presents an examination of the links between open innovation, the Triple Helix model and regional innovation systems. Highlighting the importance of boundary-spanning intermediaries, the combined role of these concepts is explored in detail. A conceptual model is then proposed which…

Exploring the Relationship between Global Quality and Group Engagement in Toddler Child Care Classrooms

Science.gov (United States)

Hooper, Alison; Hallam, Rena

2017-01-01

Toddlers' engagement with their social and physical environment is an important aspect of their experience in early care and education programs. The purpose of this research study was to examine how global quality relates to children's engagement in toddler child care classrooms. Additionally, this study explored how toddlers' group engagement…

Mirror Neurons, Theatrical Mirrors and the Honor Code

OpenAIRE

Greer, M.G. (Margaret G.)

2012-01-01

Este artículo relaciona el descubrimiento de cierta clase de células cerebrales denominados «neuronas espejo», que pueden ayudar a explicar la base biológica de la naturaleza pre-conceptual, pre-lingüística de la cognición humana, a la teoría lacaniana de la formación de la subjetividad humana en el espacio del Otro. Así explica la naturaleza inter-sujetiva del honor que Lope describe en Los comendadores de Córdoba como «aquélla que consiste en otro». La teoría de las neuronas espejo muestra ...

El aprendizaje de palabras depende de una buena conexión entre regiones del hemisferio izquierdo

Directory of Open Access Journals (Sweden)

Diana López Barroso

2013-12-01

Full Text Available La capacidad humana para aprender nuevas palabras es muy variable. En este trabajo mostramos que dicho aprendizaje se basa en una eficiente comunicación entre las regiones cerebrales que controlan el movimiento y las que procesan la información auditiva. Además, esta conexión anatómica, que tiene lugar a través del fascículo arqueado en el hemisferio izquierdo, no está igualmente desarrollada en todas las personas, lo que explicaría las diferencias individuales que existen a la hora de aprender las palabras de una lengua.

Síndrome de Down, cerebro y desarrollo

Directory of Open Access Journals (Sweden)

Andrés Molero Chamizo

2013-07-01

Full Text Available En esta revisión describiremos brevemente los aspectos fundamentales que caracterizan a la Psicología delDesarrollo y a la Neurociencia, como disciplinas científicas necesarias en el estudio y la comprensión deldesarrollo ontogenético y sus trastornos. Esto nos permitirá concretar la naturaleza de las distintas etapas deldesarrollo, y evaluar los sustratos cerebrales de la conducta asociados a estos cambios evolutivos. Finalmente,expondremos las características neurobiológicas y evolutivas de un trastorno del neurodesarrollo determinadogenéticamente, el síndrome de Down.

Post-surgery cerebral abscess due to Propionibacterium acnes

OpenAIRE

Zárate, Mariela S.; Yahni, Diego; Guevara, Martín; Smayevsky, Jorgelina

2009-01-01

Los abscesos cerebrales por Propionibacterium acnes son poco frecuentes. Es importante para el médico clínico la rápida identificación de este patógeno para la elección de una terapéutica antibiótica adecuada. En este caso se describe un paciente con una exéresis de un glioblastoma multiforme donde a los 9 meses se evidenció la existencia de una recidiva tumoral, se efectuó una extirpación tumoral subtotal y la colocación de implantes de quimioterapia en el lecho tumoral residual. Al cabo de ...

Perdida ósea margina y supervivencia a cuatro años de implantes osteointegrados colocados en pacientes con síndrome de Down y parálisis cerebral

OpenAIRE

López Giménez, Julián

2017-01-01

un estudio retrospectivo de colocación de implantes en síndrome de down paralíticos cerebrales y pacientes sanos y hacer una comparativa entre los grupos y valorar la pérdida ósea marginal y el fracaso implantológico de cada grupo además valorar otras variables según la edad prótesis localización.... RESUMEN INTRODUCCIÓN & OBJETIVOS: Evaluar la tasa de supervivencia de los implantes y la pérdida ósea marginal después de 4 años en pacientes con síndrome de D...

Programa Antiestrés de Sincronización Cerebral mediante estimulación visual

OpenAIRE

Riccardi Sabatier, Yanitza; Caraballo Pons, Isabel; Miyares Cao, Carlos Manuel; Lago Mendoza, Guillermo; Lauzán Álvarez, Efreín

2014-01-01

Se presenta un programa computarizado que permite la sincronización de las ondas cerebrales mediante una estimulación visual, a una frecuencia similar a la actividad eléctrica del cerebro en estado de sedación, lo cual favorece la disminución de los niveles de estrés en los pacientes que acuden al Centro de Histoterapia Placentaria para tratar las patologías de Vitiligo, Psoriasis y Alopecia Areata. La aplicación informática fue programada en lenguaje Delphi 7.0 y cuenta con dos módulos para ...

Aportaciones de la neuroeducación a la enseñanza y aprendizaje de la tecnología

OpenAIRE

Mayordomo Mas, Joan Manel

2015-01-01

En el contexto actual, la educación se sitúa en un momento de necesaria reflexión y planteamiento sobre los procesos de enseñanza y aprendizaje. En los últimos años, los avances en la neurociencia han aportado nuevos conocimientos que nos permiten entender cómo funciona el cerebro y cuáles son los mecanismos cerebrales mediante los que se produce el aprendizaje. Esta aportación a la pedagogía i a las bases del aprendizaje social obliga a replantear el trabajo docente en las aulas y el rol del...

Exploring ambiguous realms

DEFF Research Database (Denmark)

Clemensen, Nana

2016-01-01

In Hang'ombe Village in rural Zambia, the relative lack of physical boundaries between the activities of family members allow children to observe the actions and discussions of adults on close hand, exposing them to the ambiguities of daily life. Children explore these ambiguities in their intera...... in their interactions, testing social roles and conventions. This article explores the vigilance and creative agency displayed by Hang'ombe children, in an environment spurring their acquisition of distinct social and discursive skills.......In Hang'ombe Village in rural Zambia, the relative lack of physical boundaries between the activities of family members allow children to observe the actions and discussions of adults on close hand, exposing them to the ambiguities of daily life. Children explore these ambiguities...

Exploring Critical Alternatives for Youth Development through Lifestyle Sport: Surfing and Community Development in Aotearoa/New Zealand

OpenAIRE

Belinda Wheaton; Georgina Roy; Rebecca Olive

2017-01-01

While competition-based team sports remain dominant in community and sport-for-development programs, researchers are exploring the value of alternative, less “sportized” activities such as lifestyle/action sports. In this paper, we explore the ways in which surfing is being used in development programs in Aotearoa/New Zealand, examining the perceived social benefits and impact. Our methods involved: (a) mapping the range of surfing projects; and (b) 8 in-depth interviews with program personne...

Overseas uranium exploration by PNC

International Nuclear Information System (INIS)

Nagashima, Reiji; Iida, Yoshimasa; Shigeta, Naotaka; Takahashi, Osamu; Yamagishi, Akiko; Miyada, Hatsuho; Kobayashi, Takao

1998-01-01

Japan entirely depends on overseas countries for uranium resources for its nuclear electric power generation due to the lack of domestic resources. In order to secure a steady supply of natural uranium, Japanese government has implemented a long-term procurement policy through purchase contracts by private sectors, subsidizing private sectors' exploration and initial stage exploration outside the reach of private sectors' activity by PNC (Power Reactor and Nuclear Fuel Development Corporation). The subsequent long slump in the price of uranium, however, led most of Japanese private sectors to discontinue their exploration activity. Upon this situation, PNC has pursued a little more advanced stage exploration in addition to basic research and initial stage exploration and has improved its exploration techniques to enable the discovery of deep-seated uranium ore deposits. As the result, PNC has acquired significant uranium exploration tenements and interests similar to those owned by major uranium companies such as Cameco and Cogema. PNC has also contributed to discovery of new uranium deposits. In this report, the history of PNC's activities and its role in the long-term uranium procurement policy are reviewed and it is also described about the outcome thorough its activities and future exploration trend and the tasks. (author)

Qualitative exploration of centralities in municipal science education networks

DEFF Research Database (Denmark)

von der Fehr, Ane; Sølberg, Jan

2016-01-01

This article examines the social nature of educational change by conducting a social network analysis of social networks involving stakeholders of science education from teachers to political stakeholders. Social networks that comprise supportive structures for development of science education ar...... of science education, especially if they are aware of their own centrality and are able to use their position intentionally for the benefit of science education.......This article examines the social nature of educational change by conducting a social network analysis of social networks involving stakeholders of science education from teachers to political stakeholders. Social networks that comprise supportive structures for development of science education...... are diverse and in order to understand how municipal stakeholders may support such development, we explored four different municipal science education networks (MSE networks) using three different measures of centrality. The centrality measures differed in terms of what kind of stakeholder functions...

Health Examination by PET. (1) Cancer Examination

International Nuclear Information System (INIS)

Uno, Koichi

2006-01-01

Cancer examination by positron emission tomography (PET) started in Japan in 1994 and has been rapidly popularized. This paper describes author's experience of the examination in his hospital along the recent Japanese guideline for the PET cancer examination. Fluorodeoxyglucose (FDG) is intravenously injected at 3.7 (or 4.6, for diabetic patients) MBq/kg after 4-5 hr fasting and 40 min later, imaging is conducted with additional delayed scan at 2 hr to reduce the possible false positive. Image is taken by the equipment with PET-specific camera, of which quality assurance (QA) is maintained according to the guideline, and 3D image is constructed by the ordered subset expectation maximization method. Number of examinees during 4.5 years are 18,210 (M/F=9,735/8,475), and 236 (1.3%), together with use of other test measures like ultrasonography, computed tomography (CT), magnetic resonance imaging (MRI), biochemical marker and occult blood as well, are found to have cancer of thyroid, large bowel, lung, breast and others. The false negative rate by PET alone is 78/236 (33%) for cancer. PET examination has problems of image reading and specificity of organs, and tasks of informed consent, test cost, increased exchange of information and radiation exposure. However, PET cancer examination will be established as a routine diagnostic tool when the accumulated evidence of early cancer detection is shown useful for improving the survival rate and for reducing the medicare cost. (T.I.)

Role of scintigraphy and computer-assisted tomography in brain examination

International Nuclear Information System (INIS)

Akerman, M.; Oproiu, A.; Comoy, C.; Guiot, G.

1981-01-01

To assess the role of computer-assisted tomography (CAT) and scintigraphy in brain exploration, the authors analysed: (1) the diagnostic effectiveness of the two methods in 300 patients examined over a period of seven months; (2) the role assigned to each investigation in 169 patients operated on for intracranial lesion during the same period. The isotopic brain examination always included an initial angiographic study after the intravenous injection of a technetium compound. Study of the circulation of the cerebrospinal fluid was made with 111 In-DTPA. The detection efficiency of CAT is higher than for scintigraphy in expansive processes, whereas, conversely, in cerebrovascular accidents of ischaemic origin, isotope angiography coupled with static imaging enables one to gain more information on cerebral perfusion than CAT. Similarly, when studying the cerebrospinal fluid, scintigraphy provides a greater amount of specific data on the mechanisms governing hydrocephalus, the mode of operation of a shunt, or the site of a cerebrospinal fluid fistula. Within a neurosurgical context, CAT by and large takes precedence in brain examination, but the investigation is usually accompanied by scintigraphy or a conventional neuroradiological examination. Scintigraphy was performed on 66% of the patients, whereas for neuroradiological examination the figure was 44%. Most of the scintigraphy came after CAT so as to obtain additional diagnostic information on the vascularization, the nature and, on occasion, the exact location of the lesion revealed by CAT. In more than one case out of two, scintigraphy provides enough additional information for one to avoid neuroradiological examination, which is more 'aggressive' and more dangerous. Hence scintigraphy represents an effective complement to CAT and can compete with the conventional neuroradiological technique. (author)

Self-Efficacy and Preparation of Scholarly Writing: Online Doctoral Coursework to Comprehensive Examination--a Mixed Method Study

Science.gov (United States)

Thomas, Sonya C.

2013-01-01

Writing is seldom explicitly taught, most specifically, in academic and scholarly writing. Therefore, this mixed methods correlational phenomenology research study explored the correlation between self-efficacy perception and course room preparation for the comprehensive examination, APA standards in the course room, APA standards evaluation for…

Designing Tasks to Examine Mathematical Knowledge for Teaching Statistics for Primary Teachers

Science.gov (United States)

Siswono, T. Y. E.; Kohar, A. W.; Hartono, S.

2018-01-01

Mathematical knowledge for teaching (MKT) is viewed as fuel resources for conducting an orchestra in a teaching and learning process. By understanding MKT, especially for primary teachers, it can predict the success of a goal of an instruction and analyze the weaknesses and improvements of it. To explore what teachers think about subject matters, pedagogical terms, and appropriate curriculum, it needs a task which can be identified the teachers’ MKT including the subject matter knowledge (SMK) and pedagogical content knowledge (PCK). This study aims to design an appropriate task for exploring primary teachers’ MKT for statistics in primary school. We designed six tasks to examine 40 primary teachers’ MKT, of which each respectively represents the categories of SMK (common content knowledge (CCK) and specialised content knowledge (SCK)) and PCK (knowledge of content and students (KCS), knowledge of content and teaching (KCT), and knowledge of content and curriculum (KCC)). While MKT has much attention of numbers of scholars, we consider knowledge of content and culture (KCCl) to be hypothesized in the domains of MKT. Thus, we added one more task examining how the primary teachers used their knowledge of content (KC) regarding to MKT in statistics. Some examples of the teachers’ responses on the tasks are discussed and some refinements of MKT task in statistics for primary teachers are suggested.

The Role of Trustworthiness in Teaching: An Examination of "The Prime of Miss Jean Brodie"

Science.gov (United States)

Katz, Michael S.

2014-01-01

The purpose of this paper is to examine the role that trustworthiness plays in the ability of teachers to function as moral role models. Through exploration of Muriel Spark's novel, "The Prime of Miss Jean Brodie," I explain some of the central features of trustworthiness as a moral virtue and suggest how these features are critical…

School Violence in Taiwan: Examining How Western Risk Factors Predict School Violence in an Asian Culture

Science.gov (United States)

Chen, Ji-Kang; Astor, Ron Avi

2010-01-01

The current study explores whether theorized risk factors in Western countries can be used to predict school violence perpetration in an Asian cultural context. The study examines the associations between risk factors and school violence perpetration in Taiwan. Data were obtained from a nationally representative sample of 14,022 students from…

Exploring Cultural Variation in Eye Movements on a Web Page between Americans and Koreans

Science.gov (United States)

Yang, Changwoo

2009-01-01

This study explored differences in eye movement on a Web page between members of two different cultures to provide insight and guidelines for implementation of global Web site development. More specifically, the research examines whether differences of eye movement exist between the two cultures (American vs. Korean) when viewing a Web page, and…

Unlocking the Black Box: Exploring the Link between High-Performance Work Systems and Performance

Science.gov (United States)

Messersmith, Jake G.; Patel, Pankaj C.; Lepak, David P.

2011-01-01

With a growing body of literature linking systems of high-performance work practices to organizational performance outcomes, recent research has pushed for examinations of the underlying mechanisms that enable this connection. In this study, based on a large sample of Welsh public-sector employees, we explored the role of several individual-level…