2,408 research outputs found
Uso pedag?gico del celular en el aula
144 P?ginasRecurso Electr?nicoUso pedag?gico del celular en el aula es un estudio cuyo prop?sito fue estimar la tenencia de tel?fonos celulares por parte de estudiantes y profesores de la Instituci?n Educativa T?cnica Francisco Manzanera Henr?quez de la ciudad de Girardot, as? como caracterizar sus procesos de interacci?n social y de interactividad con la informaci?n. Para ello, se seleccion? una muestra al azar con 47.83% del total de estudiantes y 37.5% del total de profesores a quienes se les aplic? una encuesta para recuperar informaci?n sobre tales aspectos. Los hallazgos muestran que 64.7% de los estudiantes y 72.2% de los profesores cuentan con un tel?fono celular del tipo smartphone. Respecto a la interacci?n social, los estudiantes se?alaron las actividades para llegar a acuerdos, para organizar tareas y para aclarar aspectos escolares como las principales; mientras que los profesores utilizan dicho dispositivo para comunicarse con colegas o para acordar actividades con los estudiantes. Respecto a la interactividad con informaci?n, tanto estudiantes como profesores se?alaron la b?squeda y recuperaci?n como las principales actividades escolares realizadas desde su tel?fono celular. Se vislumbra un escenario id?neo para propiciar eventos de ense?anza-aprendizaje con mediaci?n de tales dispositivos. Sin embargo, es necesario ampliar las investigaciones para orientar la mediaci?n de estos dispositivos en el proceso educativo.ABSTRACT
Pedagogical use of the phone in the classroom is a study whose purpose was to estimate the holding cell phones by students and teachers of the Instituci?n Eductaiva T?cnica Francisco Manzanera Henriquez of the Girardot city, as well as characterize the processes of social interaction and interaction with the information. For this, To do this, a random sample with 47.83% of students and 37.5% of teachers who were given a survey to retrieve information about such aspects were selected. The findings show that 64.7% of students and 72.2% of teachers have a cell phone type smartphone. Regarding social interaction, students signalized to reach agreements, organizing tasks and to clarify issues such as school principal while teachers use the device to communicate with colleagues or to arrange activities with students. Regarding the interaction with information, students and teachers showed that the search and retrieval as the main school activities from your cell phone. An ideal scenario is envisioned to promote teaching and learning events mediated by such devices. However, additional research is needed to guide the mediation of these devices in the educational process.INTRODUCCI?N
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1. PLANTEAMIENTO DEL PROBLEMA
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1.1 DESCRIPCI?N DEL PROBLEMA
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1.1.1 Primera Generaci?n
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1.1.2 Segunda Generaci?n
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1.1.3 Tercera Generaci?n
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1.1.4 Cuarta Generaci?n
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2. ANTECEDENTES
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2.1 ANTECEDENTES NACIONALES
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2.1.1 Antecedentes Internacionales
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2.2 PREGUNTA DE INVESTIGACI?N
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3. OBJETIVOS
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3.1 OBJETIVO GENERAL
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3.2 OBJETIVOS ESPEC?FICOS
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4. JUSTIFICACI?N
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5. MARCO DE REFERENCIA
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5.1 MARCO NORMATIVO O LEGAL
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5.1.1 Telecomunicaciones en Colombia
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5.1.1.1 Derechos de Autor
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5.1.1.2 Protecci?n a la Propiedad Intelectual
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5.1.1.3 Normatividad.
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6. MARCO TE?RICO
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6.1 TECNOLOG?A MOTIVADORA
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6.2 EL ESTUDIANTE ACTUAL EN LA NUEVA SOCIEDAD DE LA TECNOLOG?A.
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6.3 RECONSIDERACIONES DE M?TODOS Y CONTENIDOS
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6.3.1 Las Metodolog?as
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6.3.2 Los Contenidos Curriculares
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6.4 MARCO INSTITUCIONAL.
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6.4.1 Identificaci?n del Plantel
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6.4.2 Misi?n Institucional
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6.4.3 Visi?n Institucional.
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6.4.3.1 Perfil del Estudiante
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6.4.3.2 Perfil del Docente.
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7. METODOLOG?A
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7.1 DISE?O METODOL?GICO DE LA INVESTIGACI?N
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7.2 DESCRIPCI?N DE LA POBLACI?N
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7.3 T?CNICAS E INSTRUMENTOS PARA REALIZAR EL SEGUIMIENTO
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7.3.1 Enfoque Cualitativo de la Investigaci?n
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7.3.2 T?cnica Cualitativa para el An?lisis del Discurso
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7.4 PROCESO DE LA INVESTIGACI?N
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7.5 UNIDAD DE AN?LISIS
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7.6 UNIDAD DE TRABAJO
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7.6.1 Caracterizaci?n de la Unidad de Trabajo
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7.6.1.1 Fuentes de la Informaci?n
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8. AN?LISIS DE LA INFORMACI?N
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8.1 CARACTER?STICAS GENERALES DE LOS PARTICIPANTES
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8.2 TENENCIA Y USO DE SMARTPHONES
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8.3 AN?LISIS POR GRADOS
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8.3.1 Grados S?ptimos
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8.3.2 Grados Octavos
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8.3.3 Grados Novenos
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8.3.3.1 Mayor Utilizaci?n del Potencial Intelectual
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8.3.3.2 Motivaci?n Intr?nseca
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8.3.4 Grados Decimos
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8.3.5 Grados Onces
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8.3.5.1 Ventajas del M-Learning
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8.4 DOCENTES
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8.5 HALLAZGOS
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9. CONCLUSIONES
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RECOMENDACIONES
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REFERENCIAS
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ANEXOS
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Thin-disk laser pump schemes for large number of passes and moderate pump source quality
Novel thin-disk laser pump layouts are proposed yielding an increased number
of passes for a given pump module size and pump source quality. These novel
layouts result from a general scheme which bases on merging two simpler pump
optics arrangements. Some peculiar examples can be realized by adapting
standard commercially available pump optics simply by intro ducing an
additional mirror-pair. More pump passes yield better efficiency, opening the
way for usage of active materials with low absorption. In a standard multi-pass
pump design, scaling of the number of beam passes brings ab out an increase of
the overall size of the optical arrangement or an increase of the pump source
quality requirements. Such increases are minimized in our scheme, making them
eligible for industrial applicationsComment: 16 pages, 9 figure
Compact 20-pass thin-disk amplifier insensitive to thermal lensing
We present a multi-pass amplifier which passively compensates for distortions
of the spherical phase front occurring in the active medium. The design is
based on the Fourier transform propagation which makes the output beam
parameters insensitive to variation of thermal lens effects in the active
medium. The realized system allows for 20 reflections on the active medium and
delivers a small signal gain of 30 with M = 1.16. Its novel geometry
combining Fourier transform propagations with 4f-imaging stages as well as a
compact array of adjustable mirrors allows for a layout with a footprint of 400
mm x 1000 mm.Comment: 7 pages, 6 figure
Deconstructing the Subject Condition in terms of cumulative constraint violation
Chomsky (1973) attributes the island status of nominal subjects to the Subject Condition, a constraint specific to subjects. English and Spanish are interesting languages for the comparative study of extraction from subjects, because subjects in English are predominantly preverbal, whereas in Spanish they can be either preverbal or postverbal. In this paper we argue that the islandhood of subject DPs in both English and Spanish is not categorical. The degradation associated with extraction from subjects must be attributed to the interplay of a range of more general constraints which are not specific to subjects. We argue that the interaction of these constraints has a cumulative effect whereby the more constraints that are violated, the higher the degree of degradation that results. We also argue that some speakers have a greater tolerance for constraint violations than others, which would account for widespread inter-speaker judgment variability
Numerical simulation of dark lanes in post-flare supra-arcade
We integrate the MHD ideal equations to simulate dark void sunwardly moving
structures in post--flare supra--arcades. We study the onset and evolution of
the internal plasma instability to compare with observations and to gain
insight into physical processes and characteristic parameters of these
phenomena. The numerical approach uses a finite-volume Harten-Yee TVD scheme to
integrate the 1D1/2 MHD equations specially designed to capture supersonic flow
discontinuities. The integration is performed in both directions, the sunward
radial one and the transverse to the magnetic field. For the first time, we
numerically reproduce observational dark voids described in Verwichte et al.
(2005). We show that the dark tracks are plasma vacuums generated by the
bouncing and interfering of shocks and expansion waves, upstream an initial
slow magnetoacoustic shock produced by a localized deposition of energy modeled
with a pressure perturbation. The same pressure perturbation produces a
transverse to the field or perpendicular magnetic shock giving rise to
nonlinear waves that compose the kink--like plasma void structures, with the
same functional sunward decreasing phase speed and constancy with height of the
period, as those determined by the observations.Comment: Accepted MNRAS, 6 pages, 7 figure
Drug and xenobiotic biotransformation in the blood–brain barrier: a neglected issue
Drug biotransformation is a crucial mechanism for facilitating the elimination of chemicals from the organism and for decreasing their pharmacological activity. Published evidence suggests that brain drug metabolism may play a role in the development of adverse drug reactions and in the clinical response to drugs and xenobiotics. The blood–brain barrier (BBB) has been regarded mainly as a physical barrier for drugs and xenobiotics, and little attention has been paid to the BBB as a drug-metabolizing barrier. The presence of drug-metabolizing enzymes in the BBB is likely to have functional implications because local metabolism may inactivate drugs or may modify the drug’s ability to cross the BBB, thus modifying drug response and the risk of developing adverse drug reactions. In this perspective paper, we discuss the expression of relevant xenobiotic metabolizing enzymes in the brain and in the BBB, and we cover current advances and future directions on the potential role of these BBB drug-metabolizing enzymes as modifiers of drug response
El arte una estrategia para descubrir el mundo interior del ni?o
388 p. Recurso Electr?nicoLa investigaci?n realizada ?El arte una estrategia para descubrir el mundo interior del ni?o?, tuvo como prop?sito la transformaci?n de las pr?cticas que circulan en las aulas, generando procesos significativos en los ni?os de 4 a 5 a?os. En la investigaci?n se expuso la est?tica y la art?stica, como uno de los medios que lleva al estudiante a pensar, a crear, a expresarse espont?neamente, percibir, pensar, expresar sus inquietudes y dar puntos de vista sobre lo que ve y lo que piensa.
La investigaci?n fue posible por medio de la intervenci?n de tres n?cleos denominados la pintura, el paisaje y la escena, cada uno de estos con subactividades, que permitieron aflorar sentimientos en los ni?os, los cuales se hac?an evidentes en el placer que demostraban al ejecutarlas y al observar sus rostros de asombro frente a las creaciones y producciones realizadas por ellos mismos los cuales formulaban preguntas encaminadas al enriquecimiento de su imaginaci?n, curiosidad y creatividad.
Esta propuesta fue realizada teniendo en cuenta la metodolog?a investigaci?n- acci?n- participaci?n de corte etnogr?fico, la cual, promueve y facilita la generaci?n de impacto, la transformaci?n de realidades inmediatas y la resoluci?n de problemas cotidianos teniendo en cuenta la participaci?n activa, la reflexi?n y la construcci?n colectiva de saberes.The investigation is called "The art as a strategy to discover the inner world of the child" which aims the transformation of the practices that circulate in classrooms generating significant processes in children 4-5 years old.
In this research the aesthetic and artistic as one of the means that leads the student to think, to create, to express themselves spontaneously, perceive, think, express their concerns and give views on what he sees is exposed and what you think.
The research was made possible through the intervention of three cores called the painting, the landscape and the scene with each of these sub-activities, which allowed out feelings in children, which were evident pleasure in showing to execute and observe their faces with astonishment at the creations and productions by themselves which formulated questions designed to enrich their imagination, curiosity and creativity.
This proposal was made according the research-action-participation methodology ethnographic, which promotes and facilitates the generation of the impact, the transformation of immediate realities and solving everyday problems taking into account the active participation, reflection and the collective construction of knowledge.
Keywords: research, aesthetic, artistic, thinking, painting, scene, scenery, imagination, creativity, action, participation
Enhanced frequency up-conversion in Rb vapor
We demonstrate highly efficient generation of coherent 420nm light via
up-conversion of near-infrared lasers in a hot rubidium vapor cell. By
optimizing pump polarizations and frequencies we achieve a single-pass
conversion efficiency of 260% per Watt, significantly higher than in previous
experiments. A full exploration of the coherent light generation and
fluorescence as a function of both pump frequencies reveals that coherent blue
light is generated close to 85Rb two-photon resonances, as predicted by theory,
but at high vapor pressure is suppressed in spectral regions that do not
support phase matching or exhibit single-photon Kerr refraction. Favorable
scaling of our current 1mW blue beam power with additional pump power is
predicted.Comment: 6 pages, 4 figures. Modified to include referees' improvement
Bloch oscillations of ultracold atoms: a tool for a metrological determination of
We use Bloch oscillations in a horizontal moving standing wave to transfer a
large number of photon recoils to atoms with a high efficiency (99.5% per
cycle). By measuring the photon recoil of , using velocity selective
Raman transitions to select a subrecoil velocity class and to measure the final
accelerated velocity class, we have determined with a relative
precision of 0.4 ppm. To exploit the high momentum transfer efficiency of our
method, we are developing a vertical standing wave set-up. This will allow us
to measure better than and hence the fine structure
constant with an uncertainty close to the most accurate value coming
from the () determination
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