Educational Innovation: Implementation of the Introductory Physics in Blended Learning

El artículo presenta la experiencia de la asignatura Física Introductoria en la modalidad semipresencial en la PUCMM/RSTA. La implementación del proyecto piloto tuvo varias fases incluyendo desde la preparación de materiales hasta el establecimiento de los elementos de la estrategia y la orientación de los estudiantes en la nueva modalidad. Los resultados se evaluaron utilizando diversas herramientas: cuestionarios, encuestas on-line, entrevistas y pruebas de rendimiento. Éstas fueron orientadas a aspectos relacionados con el estudiante, la asignatura, el profesorado, el contenido, la comunicación y el entorno virtual. Los resultados obtenidos fueron satisfactorios en cada una de las áreas evaluadas, incluida el rendimiento de los estudiantes.The article presents the experience of implementing the introductory physics course in b-learning format in the PUCMM /RSTA. The implementation of the pilot project includes several phases from preparing materials to establish the elements of the new strategy and guidance of students in the new method. The results were evaluated using several tools including questionnaires to students, online surveys, interviews and performance testing. These tools were oriented aspects of the student, the subject as well as aspects related to the teacher, content, communication and the virtual environment. The results were satisfactory in each of the areas evaluated as well as the performance of students

Bragg Scattering as a Probe of Atomic Wavefunctions and Quantum Phase Transitions in Optical Lattices

We have observed Bragg scattering of photons from quantum degenerate $^{87}$Rb atoms in a three-dimensional optical lattice. Bragg scattered light directly probes the microscopic crystal structure and atomic wavefunction whose position and momentum width is Heisenberg-limited. The spatial coherence of the wavefunction leads to revivals in the Bragg scattered light due to the atomic Talbot effect. The decay of revivals across the superfluid to Mott insulator transition indicates the loss of superfluid coherence.Comment: 5 pages, 4 figure

Medicinal plants with cholesterol-lowering effect marketed in the bUenos Aires-La Plata conurbation, Argentina: An urban ethnobotany study

This contribution presents 82 species of medicinal plants whose products are sold and consumed as cholesterollowering in the Buenos Aires-La Plata conurbation, Argentina. The hypocholesterolemic effect is relevant because the high level of blood cholesterol is one of the major risk factors for cardiovascular diseases, leading causes of death and disability almost worldwide. The species were selected from their locally assigned use, obtained from interviews with informants, data labels, prospectus and leaflets of products, and information diffused in the media, specially the Internet. Furthermore, a bibliographic review on scientific studies that validate the biological activity and effects of each species was accomplished. The theoretical framework of this research argues that urban botanical knowledge comprising some knowledge linked to traditions of various immigrants segments (invisible to most of the local population), and other non-traditional knowledge (visible). The assessment of these kinds of knowledge is approached from the plant products circulation in the restricted circuits of immigrants (Bolivian and Chinese for this contribution) and the general commercial circuit, so that products that pass from the first circuit to the second gain visibility. The circulation of plant products that acquire visibility also expressed the botanical knowledge transmission from one context to another, a transmission enhanced and accelerated by the media. In this framework, the visibility levels of plant products considered hypocholesterolemic in the study area are discussed.Laboratorio de Etnobotánica y Botánica Aplicad

Iberian Iron Age pottery with stamped decoration from the settlement at Cerro de la Cruz (Almedinilla, Córdoba)

Presentamos un catálogo, análisis y estudio cronológico y espacial de las cerámicas ibéricas con decoración estampillada procedentes del poblado ibérico del Cerro de la Cruz (Almedinilla), uno de los muy pocos en Andalucía excavados en extensión. Procedentes normalmente de niveles superficiales y muy fragmentadas, al contrario de lo que es normal en las estancias de este poblado destruido violentamente hacia 141 a.C., es posible que estas piezas formen parte de una fase ligeramente más antigua al nivel de destrucción y con vinculaciones con el área de Jaén e incluso la Submeseta SurWe present a detailed catalogue, analysis and chronological study of the pottery with stamped decoration from the excavations at the Iberian Iron Age settlement at Cerro de la Cruz (Almedinilla, Córdoba). These pieces have usually been found in superficial strata and are usually very fragmentary shards, in striking contrast with the usual pattern of almost complete pottery vessels found in the different buildings from the this site, violently destroyed c. 141 BC. It is possible that these productions are part of a slightly earlier chronological phase of the site, and that they have connections with the region of Jaén to the Northeast, and even with the Southern Meseta of the Iberian Peninsul

Turismo y desarrollo en el Caribe colombiano

El turismo es uno de los sectores económicos más dinámicos del mundo por la generación empleo, el aporte de divisas y su contribución al desarrollo regional. En Colombia, el Caribe se ha consolidado como la región turística por excelencia dado el atractivo de sus recursos y su trayectoria. Sin embargo, esta actividad no ha alcanzado un desarrollo comparable con el logrado por otros países. En consideración a las potencialidades del turismo como estrategia de desarrollo regional y a su elección como apuesta productiva prioritaria de los departamentos de la región, el objetivo de este documento fue revisar las políticas de turismo existentes en Colombia y su importancia en la economía, y determinar las acciones que se deben reforzar en la región Caribe para lograr el desarrollo de este sector. Se concluye que el turismo es una oportunidad para que el Caribe colombiano actúe de manera conjunta en la creación de una instancia regional que lidere la ejecución de los planes maestro de turismo existentes, en la puesta en marcha de un Centro de Innovación de Turismo y en el diseño e implementación de un sistema de información turístico.Turismo, desarrollo regional, productos turísticos, economía regional, Caribe colombiano

Characterization of immune response to neurofilament light in experimental autoimmune encephalomyelitis

PMCID: PMC3856490This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.PMCID: PMC385649

Ray splitting in paraxial optical cavities

We present a numerical investigation of the ray dynamics in a paraxial optical cavity when a ray splitting mechanism is present. The cavity is a conventional two-mirror stable resonator and the ray splitting is achieved by inserting an optical beam splitter perpendicular to the cavity axis. We show that depending on the position of the beam splitter the optical resonator can become unstable and the ray dynamics displays a positive Lyapunov exponent.Comment: 13 pages, 7 figures, 1 tabl

Bisnorneolignano de la madera de ocotea simulans

Del extracto etanólico de la madera de Ocotea simulans además de eugenol y P-sitosterol, un nuevo compuesto rel-(7S,8S)-4-hidrox¡-7'-oxo- 8.3',7,0.4'-8',9'-bisnorneolignano fue aislado. Las estructuras fueron determinadas por métodos espectroscópicos y por comparación con datos de la literatura