Measurement of the half-life of 198Au in a non-metal: High-precision measurement shows no host-material dependence

We have measured the half-life of the beta decay of 198Au to be 2.6948(9) d, with the nuclide sited in an insulating environment. Comparing this result with the half-life we measured previously with a metallic environment, we find the half-lives in both environments to be the same within 0.04%, thus contradicting a prediction that screening from a "plasma" of quasi-free electrons in a metal increases the half-life by as much as 7%

A Comparative Study of Perceptions and Use of Google Scholar and Academic Library Discovery Systems

Google Scholar and academic library discovery systems are both popular resources among academic users for finding scholarly information. By conducting an online survey with 975 users from more than 20 public research universities across the United States, this study comparatively investigates how and why academic users use these two resources. Results show that the ways participants used both resources were similar, and both were perceived as highly accessible and useful. Academic library discovery systems’ perceived comprehensiveness, subjective norm, loyalty, and intended use were higher than Google Scholar, while Google Scholar’s perceived ease of use, system quality, and satisfaction were higher than that of academic library discovery systems

La exposici?n como t?cnica did?ctica para el fortalecimiento de la competencia oral, de los estudiantes del ciclo dos del Liceo Rozford jornada ?nica localidad octava de Kennedy

84 P?ginasEl presente informe de investigaci?n: ?la exposici?n como t?cnica did?ctica para el fortalecimiento de la competencia oral, de los estudiantes de ciclo dos del Liceo Rozford jornada ?nica localidad octava de Kennedy,? ha optado por proponer el desarrollo de una estrategia para mejorar en ellos su competencia oral, fundamentada en la t?cnica did?ctica de la exposici?n: falta de vocabulario, sintaxis, fluidez verbal, comprensi?n y pragm?tica, enfocada principalmente en su espontaneidad al responder una pregunta. Se pretende que con la exposici?n como t?cnica did?ctica, se logre fortalecer la competencia oral en estos ni?os. Este proceso se inici? a partir de las observaciones de clases, diarios de campo, proyectos institucionales, entrevista con docentes y directivas de la instituci?n, que contribuyeron a detectar y a plantear problem?ticas en ?rea de lengua castellana, se realiz? a partir de talleres l?dicos, impulsados seg?n su competencia oral. Para lo cual, se plasmaron siete fases: De sensibilizaci?n, diagn?stico, an?lisis, dise?o, desarrollo, evaluaci?n y divulgaci?n. Por esta raz?n, el objetivo del proyecto es: mejorar la competencia oral de los estudiantes descritos anteriormente, por medio de actividades expositivas tales como: el juego de roles, el panel, el sociodrama, el interrogatorio, la mesa redonda y el torbellino de ideas. Para concluir, la propuesta de intervenci?n pedag?gica, evidencia los resultados desde la investigaci?n formativa y la l?nea Investigaci?n- Acci?n- Participaci?n (I.A.P.).ABSTRACT. This research report: " the exhibition as a teaching technique for strengthening the oral competition, of the students of second cycle of Liceo Rozford eight Locality of Kennedy, " has chosen to propose the development of a strategy to improve their oral competence, based on the teaching technique of exposure: lack of vocabulary, syntax, verbal fluency, comprehension and pragmatic, focused mainly on spontaneity to answer a question. It is intended that exposure as a teaching technique, strengthening oral expression in these children. This process will start from classroom observations, field notes, institutional projects, interviews to teachers and school administrative that contributed to detection and expose problems in the Spanish language area. This educational intervention was conducted from recreational workshops, driven by oral competition. From awareness, diagnosis, analysis, design, development, evaluation and dissemination: For which, seven phases were reflected. Therefore, the objective of the project is to improve the oral proficiency of students described above, by means of exhibition activities such as role play, panel, the skit, the interrogation, the round table and brainstorming. In conclusion, the proposed pedagogical intervention evidences results from the formative Participation - Action - Research (PAR).ADVERTENCIA. El Instituto de Educaci?n a Distancia, Programa de Licenciatura en Educaci?n B?sica con ?nfasis en Lengua Castellana La Universidad del Tolima, el director de trabajo y el jurado calificador, no son responsables de lo concepto ni de las ideas expuestas por el autor del presente trabajo Art?culo 16, Acuerdo 032 de 1976 y Articulo 29, Acuerdo 064 de 1991, Consejo Acad?mico de la Universidad del Tolima.Las autoras GISELLE OSORIO GONZ?LEZ Y M?NICA ALEJANDRA ROZO RINC?N autorizan a la UNIVERSIDAD DEL TOLIMA la reproducci?n total o parcial de este documento, con la debida cita de recomendaci?n de la autor?a y cede a la misma Universidad los derechos patrimoniales, con fines de investigaci?n, docencia e institucionales, consagrado en el art?culo 72 de la Ley 23 de 1.982 y la norma que lo incluyan o modifiquen. (Acuerdo 0066 de 2003 ?Por el cual adoptan norma relacionada con la presentaci?n de tesis y trabajo de grado? CONSEJO ACAD?MICO DE LA UNIVERSIDAD DEL TOLIMA).INTRODUCCI?N 11 1. PLANTEAMIENTO DEL PROBLEMA 12 1.1 DESCRIPCI?N Y FORMULACI?N DEL PROBLEMA 12 2. JUSTIFICACI?N 14 3. OBJETIVOS 15 3.1 OBJETIVO GENERAL 15 3.2 OBJETIVOS ESPEC?FICOS 15 4. MARCO TE?RICO 16 4.1 ANTECEDENTES 16 4.2 MARCO LEGAL 17 4.3 MARCO EPISTEMOL?GICO 18 4.4 MARCO PSICOL?GICO 19 4.5 MARCO PEDAG?GICO 20 4.6 MARCO CONCEPTUAL 22 5. DISE?O METODOL?GICO 24 5.1 TIPO DE INVESTIGACI?N 24 5.2 ENFOQUE DE LA INVESTIGACI?N 24 5.3 PAR?METROS DE LA INVESTIGACI?N 25 5.3.1 Poblaci?n 25 5.4 FICHA T?CNICA DE LA INSTITUCI?N 26 5.4.1 Contextualizaci?n del Liceo 26 5.4.2 Muestra 27 5.5 RECOLECCI?N DE DATOS DE LA INFORMACI?N 27 5.5.1 Observaci?n etnogr?fica 27 5.5.2 Diario de campo 28 5.5.3 Estudio de casos 28 5.5.4 Entrevista 28 5.5.5 Los grupos focales 29 5.6 ETAPAS DE LA INVESTIGACI?N 29 5.6.1 Fase 1 29 5.6.2 Fase 2 29 5.6.3 Fase 3 29 6. AN?LISIS DE RESULTADOS 30 6.1 PERFIL DE LOS ESTUDIANTES PARTICIPANTES EN EL PROYECTO 30 6.2 DESARROLLO DE LAS ACTIVIDADES PROPUESTAS EN EL PROYECTO 31 7. CONCLUSIONES 58 RECOMENDACIONES 60 REFERENCIAS BIBLIOGR?FICAS 61 ANEXOS 6

Complete diagrammatics of the single ring theorem

Using diagrammatic techniques, we provide explicit functional relations between the cumulant generating functions for the biunitarily invariant ensembles in the limit of large size of matrices. The formalism allows to map two distinct areas of free random variables: Hermitian positive definite operators and non-normal R-diagonal operators. We also rederive the Haagerup-Larsen theorem and show how its recent extension to the eigenvector correlation function appears naturally within this approach.Comment: 18 pages, 6 figures, version accepted for publicatio

MTOR pathway is involved in energy homeostasis regulation as a part of the gut?brain axis

Mammalian, or mechanic, target of rapamycin (mTOR) signaling is a crucial factor in the regulation of the energy balance that functions as an energy sensor in the body. The present review explores how the mTOR/S6k intracellular pathway is involved in modulating the production of different signals such as ghrelin and nesfatin-1 in the gastrointestinal tract to regulate food intake and body weight. The role of gastric mTOR signaling in different physiological processes was studied in depth through different genetic models that allow the modulation of mTOR signaling in the stomach and specifically in gastric X/A type cells. It has been described that mTOR signaling in X/A-like gastric cells has a relevant role in the regulation of glucose and lipid homeostasis due to its interaction with different organs such as liver and adipose tissue. These findings highlight possible therapeutic strategies, with the gut-brain axis being one of the most promising targets in the treatment of obesity

Branching ratios for the beta decay of 21Na

We have measured the beta-decay branching ratio for the transition from 21Na to the first excited state of 21Ne. A recently published test of the standard model, which was based on a measurement of the beta-nu correlation in the decay of 21Na, depended on this branching ratio. However, until now only relatively imprecise (and, in some cases, contradictory) values existed for it. Our new result, 4.74(4)%, reduces but does not remove the reported discrepancy with the standard model.Comment: Revtex4, 2 fig