Infrared nanoscopy of Dirac plasmons at the graphene-SiO2 interface

We report on infrared (IR) nanoscopy of 2D plasmon excitations of Dirac fermions in graphene. This is achieved by confining mid-IR radiation at the apex of a nanoscale tip: an approach yielding two orders of magnitude increase in the value of in-plane component of incident wavevector q compared to free space propagation. At these high wavevectors, the Dirac plasmon is found to dramatically enhance the near-field interaction with mid-IR surface phonons of SiO2 substrate. Our data augmented by detailed modeling establish graphene as a new medium supporting plasmonic effects that can be controlled by gate voltage.Comment: 12 pages, 4 figure

Cataclysmic Variables in the First Year of the Zwicky Transient Facility

Using selection criteria based on amplitude, time, and color, we have identified 329 objects as known or candidate cataclysmic variables (CVs) during the first year of testing and operation of the Zwicky Transient Facility. Of these, 90 are previously confirmed CVs, 218 are strong candidates based on the shape and color of their light curves obtained during 3–562 days of observation, and the remaining 21 are possible CVs but with too few data points to be listed as good candidates. Almost half of the strong candidates are within 10 deg of the galactic plane, in contrast to most other large surveys that have avoided crowded fields. The available Gaia parallaxes are consistent with sampling the low mass transfer CVs, as predicted by population models. Our follow-up spectra have confirmed Balmer/helium emission lines in 27 objects, with four showing high-excitation He ii emission, including candidates for an AM CVn, a polar, and an intermediate polar. Our results demonstrate that a complete survey of the Galactic plane is needed to accomplish an accurate determination of the number of CVs existing in the Milky Way

Influencia de las nuevas tecnologías de la información y la comunicación para mejorar el aprendizaje en el área de Ciencia y Ambiente, en los estudiantes del Sexto Grado de Educación Primaria de la Institución Educativa N° 16173, Santa Rosa -Jaén - 2014

El estudio realizado buscó determinar la influencia de las Tecnologías de la información y comunicación en el aprendizaje del área de ciencia y ambiente, objetivo que se consolidó con la propuesta, nuevas tecnologías para desarrollar aprendizajes significativos, en el área de Ciencia y Ambiente, en estudiantes del sexto grado de Educación Primaria de la Institución Educativa Nª 16173, Santa Rosa- Jaén. El tipo de estudio fue de tipo mixto de diseño cuasi experimental. La población y muestra de estudio estuvo conformada por 22 estudiantes comprendidos entre los 6 y 12 años de edad, de los cuales el 55% fue de sexo femenino y 45% masculino. El instrumento estuvo basado en un cuestionario para medir conocimiento, conformado por 8 preguntas; aplicación, organizada en 4 preguntas y el razonamiento mediante 4 interrogantes y con un coeficiente de fiabilidad determinada por el alfa de Crombach de 0,889, también se recurrió a medidas de tendencias central: media aritmética, moda, mediana. Finalmente, se concluye, asumiendo que el programa “nuevas tecnologías de la información”, incidió significativamente en el desarrollo de un conjunto de capacidades en los estudiantes del sexto grado de educación primaria, tales como: selecciona medios o herramientas tic para generar redes de interaprendizaje, selecciona y organiza información, organiza conceptos y teorías, comprende y fundamenta conocimientos científicos, problematiza situaciones y analiza datos en función de las implicancia del saber y hacer científico.Tesi

Cataclysmic Variables in the First Year of the Zwicky Transient Facility

Using selection criteria based on amplitude, time, and color, we have identified 329 objects as known or candidate cataclysmic variables (CVs) during the first year of testing and operation of the Zwicky Transient Facility. Of these, 90 are previously confirmed CVs, 218 are strong candidates based on the shape and color of their light curves obtained during 3–562 days of observation, and the remaining 21 are possible CVs but with too few data points to be listed as good candidates. Almost half of the strong candidates are within 10 deg of the galactic plane, in contrast to most other large surveys that have avoided crowded fields. The available Gaia parallaxes are consistent with sampling the low mass transfer CVs, as predicted by population models. Our follow-up spectra have confirmed Balmer/helium emission lines in 27 objects, with four showing high-excitation He ii emission, including candidates for an AM CVn, a polar, and an intermediate polar. Our results demonstrate that a complete survey of the Galactic plane is needed to accomplish an accurate determination of the number of CVs existing in the Milky Way

Murakami Haruki in Greater China: Creative Responses and the Quest for Cosmopolitanism

The relationship between popular culture and East Asian identity is now an established field of enquiry, with the products of Japan's mass media industries—television series, pop stars, and manga—still providing much of the fuel for debate. This paper, however, moves away from the dominant notion of “culture as industry,” and explores animated personal responses to the fiction of Japanese writer Murakami Haruki in Hong Kong, China, and Taiwan through art house cinema, popular fiction, and online creative communities. The vogue for Murakami has swept across the region in recent years, and for many of those inspired by his work, it is Murakami's role as a conduit to cosmopolitan cultural citizenship that is so alluring. Yet rather than crude imitation, the filmmakers, writers, and Internet fans analyzed here misappropriate the “Murakami mood” in different ways, and in the process, they reveal the diverse meanings that attach to cosmopolitanism across contemporary East Asia