206 research outputs found
Applications of Ring Resonators and fiber delay lines for sensors and WDM Networks
No full textEn esta tesis doctoral, se presentan diversas aportaciones científicas en el ámbito de las aplicaciones de la fibra óptica y de las comunicaciones ópticas.
En primer lugar, la tesis doctoral describe nuevas técnicas de medida remota y multiplexación en longitud de onda (WDM), a través de fibra óptica monomodo, para sensores ópticos.
Las técnicas de medida están orientadas a sensores de intensidad óptica y se basan en configuraciones ópticas implementadas mediante redes de Bragg en fibra y líneas de retardo en fibra recirculantes (anillo resonante) y no recirculantes.
En el documento se describen matemáticamente dichas técnicas y se presentan medidas experimentales que verifican los modelos teóricos.
En segundo lugar, la tesis contiene diversas contribuciones novedosas al diseño y simulación por ordenador de filtros fotónicos compuestos basados en el anillo resonante con interferómetro Sagnac, para la compensación de la dispersión cromática en enlaces de transmisión digital con fibra óptica.
Por último, el documento incluye un listado de todas las referencias empleadas, un listado de los acrónimos empleados, así como las publicaciones y patentes obtenidas por el autor hasta la fecha.Los proyectos de la Comisión Interministerial de Ciencia y Tecnología (CICYT): TIC2003-03783 (DISFOTON) y TEC2006-13273-C03-03-MIC (FOTOCOMIN).
El programa de I+D+i de la Comunidad Autónoma de Madrid: FACTOTEM-CM (S-0505/ESP/000417). La Acción Integrada Hispano-Portuguesa del Plan Nacional de I+D+i 2004-2007:
Self-referenced fibre optic intensity configurations for single and multi-sensors (HP2007-0093). El proyecto cofinanciado por la Universidad Carlos III de Madrid y la Comunidad Autónoma de Madrid: Fotónica en visualización, comunicaciones y sensores
(CCG06-UC3M/TIC-0619). Las ayudas a la movilidad de investigadores en formación que me concedió la Universidad Carlos III de Madrid en 2006 y 2007.
La Red Temática Europea SAMPA (HPRN-CT-2002-00202) del 5º Programa Marco de la Unión Europea. La Acción Europea FIDES (COST Action 299) del 6º Programa Marco de la Unión
Europea. Y las Redes de Excelencia Europea ePhoton/ONe+ (FP6-IST-027497) y BONE (FP7-ICT-216863), del 6º y 7º Programa Marco de la Unión Europea, respectivamente
3. La antorcha del neoliberalismo
No full textEl presente artículo realiza un análisis sobre el factor cultural como determinante de la hegemonía del modelo neoliberal en nuestro país; estudio que abarca desde la forma cómo se ejerce el poder para implantar o promover una cultura neoliberal —a través de un sometimiento pasivo (hegemonía)—, hasta el comportamiento de los más vulnerables y perjudicados: la clase trabajadora. Además, efectuaremos un estudio sobre el postmodernismo y los medios de comunicación; para así tratar de responder a la siguiente interrogante: ¿a qué se debe la inamovilidad del neoliberalismo en nuestro país
Repertorio Americano. Edición del 19-DICIEMBRE-1936
No full textAzorín, La situación actual de Gide, 353* Raphael Schwartz, André Gide, 353* SA, Los libros de la semana, 354* SA, Anís Imperial, 354* Pío Bolaños, Leyendo a Coleridge, 355* Emilia Prieto, Personalidad, 355* SA, John M. Keith & Co., 356* SA, Kinocola, 357* SA, Mensaje que la mesa permanente de la Sección española de la unión Internacional por la Paz envió al congreso que esta entidad inicia en Bruselas el día 3 de septiembre de 1936, 358* Artiñano, Cara y cruz, 358* Juan Montalvo, Dos fragmentos de Montalvo, 359* SA, Los intelectuales soviéticos se solidarizan con el pueblo español, 359* Alberto Arredondo, De la Cuba de hoy Un historiador muy conocido pero poco comprendido, 360* Jorge Manach, E. Roig de Leuchsenring, 360* Isolina Rondón, Marta Lomar en Trinidad, 360* Francisco Romero, En el entierro del Dr. Alejandro Korn, 361* SA, Dr. Alejandro Korn, 361* Pedro Enriquez Ureña, Un maestro, 361* León Trotski, Dichos y Ejemplos, 362* William Preston Rambo, Poesías, 362* SA, Manuel Azaña en Colombia, 363* SA, En el primer acto de la primera gran guerra, 363* Gervase Markham, Virtudes del pescador de caña, 363* SA, Georges Duhamel alaba la cultura latinoamericana, 363* Juan del camino, Sr. Pdte. Roosevelt: ¿En qué quedamos? ¿Democracia o constabularia?, 364* E. Martínez Naranjo, Correspondencia, 365* Mario Sancho, ¿Hay opinión pública vigilante?, 366* Rafael Alberti, Un fantasma recorre Europa, 367* Juan de Arguijo, Cuento español, 367* SA, Banco Anglo Costarricense, 367* Elías Entralgo, La tiranía en América, 368* Laporte, Glorificando a uno que no es nada, 368
Encuentro de Ciencias Básicas (4) : Las ciencias básicas y los nuevos retos. Experiencias significativas en el aula y I Congreso internacional de Red de Departamentos de Ciencias Básicas: ciencia y tecnología
No full textEl IV Encuentro de ciencias básicas: las ciencias básicas y los nuevos retos. Experiencias significativas en el aula y I Congreso internacional de Red de Departamentos de Ciencias Básicas: ciencia y tecnología, se desarrolló en las
instalaciones de la Universidad Agustiniana y contó con el apoyo y la organización de la Red de Departamentos de Ciencias Básicas, constituidas por las universidades Católica de Colombia, Agustiniana, Santo Tomás, de La Salle y Sergio Arboleda. En estas memorias se recopilan los mejores trabajos de investigación y reflexión presentados en el evento, que aportan discusiones desde diferentes perspectivas teóricas al problema central que convoca este evento. (tomado de la fuente})Contenido
Prólogo.. 5
Fredy Ramón Garay-Garay
Valor agregado en instituciones de educación superior de Bogotá ..9
Added value in higher education institutions in Bogotá
Yeimmy Katherine Serrano León, Alberto Montalvo Castro, Julio César León Luquez, Jony Enrique Romero Guerrero, John Álvaro Soto Quintero
Reflexiones pedagógicas sobre el contexto de enseñanza y aprendizaje en el Departamento de Ciencias Básicas de la Fundación Universitaria del Área Andina… 22
Pedagogical Reflections on the Context of Teaching and Learning in the Departments of Basic Sciences of Fundación Universitaria del Área Andina Nelly Yolanda Céspedes Guevara, Javier Cortés Martín
Evaluación de la responsabilidad social empresarial en un proceso licitatorio ..31
Evaluation of Corporate Social Responsibility in a Bidding
Édgar Antonio Pinto Cruz
Desarrollo de competencias científicas en cursos de Química .. 46
Development of Scientific Competences in Chemistry Courses
Margarita Rendón Fernández, Vanessa Gómez
Desempeño en la prueba específica de Pensamiento Científico: componente de Física, pruebas Saber Pro 2017 ..58
Performance on the Specific Scientific Thinking Test: Physics Component, Saber Pro 2017 Tests
Katherine Serrano León, Alberto Montalvo Castro, Julio César León, Jairo Coral Campaña, José Martínez Saavedra
Variaciones de aprendizaje en línea: una experiencia integradora de arte y geometría .. 69
Variations of Online Learning: An Integrating Experience of Art and Geometry
Catalina del Pilar Murcia Flórez
Influencia de las comunidades de práctica en el aprendizaje social de aula.. 80
Influence of the Practice Communities in the Classroom Social Learning Process
Elvia Ramos-Delgado, Emilbus A. Uribe, Gabriel Fernando Acevedo-Amaya
Evaluación por competencias en física mecánica ..92
Competency-based Evaluation in Mechanical Physics
Alejandro Ferrero Botero, Carlos Andrés Flórez
Características de la enseñanza del concepto de razón de cambio en las áreas de Física y Cálculo de la Universidad de La Salle y la Universidad Católica de Colombia ..103
Characteristics of the Teaching of the Concept of Rate of Change in the Areas of Physics and Calculus at the Universidad de La Salle and the Universidad Católica de Colombia
Francisco Niño Rojas, Wilson Pico Sánchez, Marco Aurelio Barrero Cubillos
Elementos identitarios de las prácticas de los docentes universitarios de ciencias básicas: diseño y validación de un instrumento sobre identidad docente ..125
Identity Elements of the Practices of University Teachers of Basic Sciences: Design and Validation of an Instrument on Teaching Identity
Fredy Ramón Garay-Garay, Susana Mejía Vélez
Estudio DFT y QTAIM de moléculas orgánicas (PAZ, CHR, TCNQ, PTZ, PMA y BINA) con posible aplicación en electrónica molecular .. 136
A DFT and QTAIM Study of Organic Molecules (PAZ, CHR, TCNQ, PTZ, PMA and BINA) with Possible Application in Molecular Electronic
Emilbus A. Uribe, Gabriel Fernando Acevedo-Amay
Jorge Icaza y Su Creación Literaria
No full textEcuador is known in the world of letters for more than one writer of continental renown, among them being José Joaquín Olmedo, Juan León Mera, Juan Montalvo, Jorge Carrera Andrade, Alfredo Pareja Diez-Canseco, and Jorge Icaza. Critics, in general, have rated the last as the greatest of the indigenist writers of Ecuador as well as one of the most outstanding novelists of the Indian theme in all of Hispanic America. Nevertheless, the literary activity of this Ecuadorian writer is not restricted exclusively to the novel as a genre, nor to the Indian as theme. Theater, short story and novel constitute the complete scope of his literary, political and social concerns. Furthermore, he is equally preoccupied with the mestizo--for him the keystone of Latin American society--as he is with the tragedy of the aborigine. Jorge Icaza was initiated into the field of letters as an actor and theatrical writer, winning widespread applause on the national scene. Seven pieces, aside from his numerous roles as an actor, testify to his labor in this field. They are, in chronological order: El intruso (1928), La comedia sin nombre (1929), Por el viejo (1929), ¿Cuál es? (1931), Como ellos quieren (1931), Sin sentido (1932), and Flagelo (1936). The first three pieces reveal strong influence of the Spanish theater of customs and of French vaudeville, while the latter reflect equally his intellectual preoccupations and his political-social tendencies. In the last work, Icaza shows himself to be a true artist of agitation, both in his own society and in that of Spanish America in general. The short story and the novel are the tribunal for those preoccupations. Two collections of short stories, Barro de la Sierra (1933), and Seis relatos (1952)--as well as Viejos cuentos (1954), a reconstruction of some of them together with assorted others--are his contributions to the former genre. Huasipungo (1934), En las calles (1935), Cholos (1938), Media vida deslumbrados (1942), Huairapamushcas (1948), and El chulla Romero y Flores (1958), give testimony to his novelistic activity. In the first chapter of this thesis the writer and the genesis of his literary work are presented, showing how the work was shaped by circumstantial reality and tied strongly to the author\u27s personality. In the following chapter, Icaza\u27s theatrical work is studied in detail, emphasizing the techniques employed, as well as the Freudian and Marxist preoccupations of the author together with his rebellious call for social justice and respect for human dignity. The next chapter is dedicated to the detailed analysis of each of the stories which make up the two principal collections, as well as the author\u27s social protest on behalf of the Indian, the mestizo, and the deprived proletariat; that is to say, his well known leftist militancy, especially notable in Barro de la Sierra. The following four chapters deal with Icaza\u27s novels. Particular emphasis has been placed on the study of the disputed novel, Huasipungo, one of Latin America\u27s greatest allegations in favor of the Indian. Finally, in the last chapter, the conclusions are presented, according to which Icaza emerges not only as one of the greatest defenders of the Indian, but also as the novelist of the mestizo, the common man of America oppressed by infinite problems, but in full march toward the realization of his destiny. The present study embraces the socio-political, as well as the literary values of Icaza\u27s works. The author is perceived as a talented artist deeply committed to his own society and endowed with a three-fold mission eminently, though not exclusively, his own. By virtue of this triple impact, Icaza stands as one of the great names in twentiethcentury Latin American letters
Interrelated Factors Affecting Quantitative Reasoning Scores on the 2016 Saber Pro for Students in Conflict Zones
No full textDados los recientes acuerdos de paz y todos los procesos llevados a cabo a razón
del posconflicto, es necesario indagar por el estado de la educación para cumplir
los retos que le atañen. Es así pertinente estudiar los factores que inciden en los
desempeños de los estudiantes –en las pruebas Saber Pro, en los componentes
lectura crítica, razonamiento cuantitativo, competencias ciudadanas e inglés–
que residen en los municipios inmersos en el conflicto y que presentaron las
pruebas en el año 2016. A partir de los modelos jerárquicos lineales se analizará
la relación de las variables en cuanto a estudiante, institución (universidad de
procedencia) y zona, dando cuenta de los aspectos que intervienen en los resultados
obtenidos. Por estudios previos se tiene que variables relacionadas con
el estudiante y con la institución son determinantes en el desempeño, de modo
que en este estudio se examinará la incidencia de las variables concernientes a la
zona de residencia; además de las relacionadas con estudiante y universidad en
el desempeño académico.**Given the recent peace accords and all of the processes undergone due to the
post-conflict, it is necessary to investigate the state of education to meet the
challenges that accompany these changes. It is thus pertinent to study the factors
that coincide with student performance (in Saber Pro exams, the components
of critical reading, quantitative reasoning, citizen competencies, and English)
for students who live in municipalities immersed in the conflict and who took
the exams in 2016. Based on linear hierarchical models, variables are analyzed
regarding the student, the institute (university of study) and the region, thus
providing an account of the aspects that influence the results obtained. From
previous studies, it has been ascertained that variables related to the student and
the institute are determinants for performance. As such, this study will examine
the coincidence of variables concerning the area of residence, in addition to
those related to student and university, that affect academic performance
Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at √sNN=5.02 TeV
No full textOpen Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the
source are credited. Funded by SCOAP3 / License Version CC BY 4.0.Dijet production has been measured in pPb collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV . A data sample corresponding to an integrated luminosity of 35 nb −1 was collected using the Compact Muon Solenoid detector at the Large Hadron Collider. The dijet transverse momentum balance, azimuthal angle correlations, and pseudorapidity distributions are studied as a function of the transverse energy in the forward calorimeters ( E 4<|η|<5.2 T ). For pPb collisions, the dijet transverse momentum ratio and the width of the distribution of dijet azimuthal angle difference are comparable to the same quantities obtained from a simulated pp reference and insensitive to E 4<|η|<5.2 T . In contrast, the mean value of the dijet pseudorapidity is found to change monotonically with increasing E 4<|η|<5.2 T , indicating a correlation between the energy emitted at large pseudorapidity and the longitudinal motion of the dijet frame. The pseudorapidity distribution of the dijet system in minimum bias pPb collisions is compared with next-to-leading-order perturbative QCD predictions obtained from both nucleon and nuclear parton distribution functions, and the data more closely match the latter
Measurement of WZ and ZZ production in pp collisions at √s = 8 TeV in final states with b-tagged jets
No full textOpen Access This article is distributed under the terms of the Creative
Commons Attribution License which permits any use, distribution, and
reproduction in any medium, provided the original author(s) and the
source are credited.
Funded by SCOAP3 / License Version CC BY 4.0.Measurements are reported of the WZ and ZZ production cross sections in proton-proton collisions at s √ =8 TeV in final states where one Z boson decays to b-tagged jets. The other gauge boson, either W or Z, is detected through its leptonic decay (either W→eν , μν or Z→e + e − , μ + μ − , or νν ¯ ). The results are based on data corresponding to an integrated luminosity of 18.9 fb −1 collected with the CMS detector at the Large Hadron Collider. The measured cross sections, σ(pp→WZ)=30.7±9.3(stat.)±7.1(syst.)±4.1(th.)±1.0(lum.)pb and σ(pp→ZZ)=6.5±1.7(stat.)±1.0(syst.)±0.9(th.)±0.2(lum.)pb , are consistent with next-to-leading order quantum chromodynamics calculationsBMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil);
MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CS (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF(Germany);GSRT(Greece);OTKAand NIH(Hungary);DAEand DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania);MOE and UM(Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland);
NSC (Taipei); ThEPCenter, IPST, STAR and NSTDA(Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA)
Probing color coherence effects in pp collisions at √s = 7 TeV
No full textOpen Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the
source are credited. Funded by SCOAP3 / License Version CC BY 4.0.A study of color coherence effects in pp collisions at a center-of-mass energy of 7TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36 pb-1. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.BMWF and FWF (Austria); FNRS and FWO(Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil);MES
(Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF(Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland);
CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of
Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, andUASLPFAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR(Russia);MESTD (Serbia); SEIDI and CPAN(Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA)
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