La cotidianidad como herramienta conceptual en la ense?anza de las ciencias naturales en el Colegio Liceo Psicopedag?gico Sibat?

73 p. Recurso Electr?nicoEl proceso de ense?anza de las Ciencias Naturales se ha tornado mon?tono y repetitivo para los estudiantes, principalmente por la falta de pr?cticas asociadas a los conceptos manejados en las aulas, por lo que se ha generado distanciamiento y apat?a por parte de los estudiantes hacia las clases de Ciencias Naturales. Si bien es cierto que los actuales escolares son nativos tecnol?gicos, y poco se impresionan con algunas experiencias, es labor del docente incentivar la capacidad de asombro y respuesta en sus educandos. ?C?mo hacerlo en este cambiante momento de la humanidad? Regresando a lo simple, b?sico y elemental de las experiencias cotidianas puede ser una opci?n, mostrar la utilidad real de los aprendizajes ser?a sin lugar a dudas otra alternativas, que fusionadas con los saberes te?ricos constituye una gran estrategia educativa. No existe nada m?s motivante para un educando que ver transformadas palabras en experiencias tangibles, m?s aun cuando dichas experiencias se asocian con su cotidianidad. Palabras claves: Contexto, cotidianidad, ambiente de aprendizaje, experimentos, pr?cticas de conocimiento, cienciaThe process of teaching Natural Sciences has become monotonous and repetitive for students, mainly due to the lack of practices associated with the concepts handled in the classroom, which has generated students' distancing and apathy towards classes of Natural Sciences. While it is true that the current schoolchildren are technological natives, and are little impressed with some experiences, it is the teacher's job to encourage the capacity for wonder and response in their students. How to do it in this changing moment of humanity? Returning to the simple, basic and elementary of everyday experiences may be an option, showing the real usefulness of learning would undoubtedly be another alternative, which fused with theoretical knowledge constitutes a great educational strategy. There is nothing more motivating for an educated person than to see transformed words into tangible experiences, even more so when such experiences are associated with their daily lives. Keywords: Daily life, experiments, knowledge practices, context, science, field, learning environments

Two Models of Coteaching from University Teaching Staff: Phenomenographic Research

The literature of coteaching in the post-secondary landscape encompasses a wide array of different conceptions. Having multiple meanings of coteaching in higher education may pose some challenges for effectively implementing and researching this collaborative model. We should have a clear picture of the qualitatively different ways in which educators who co-teach in post-secondary settings understand this practice. Aiming to offer one of the first contributions to this effort, we analyzed the experiences of 16 university coteaching practitioners from a top university in Bogotá, Colombia. The sample participants´ interviews were analyzed using a phenomenographic methodology (Marton, 1981), which seeks to capture the variation and complexity of the understanding of a phenomenon. Our findings reveal two perspectives for understanding coteaching, one relying on the meaning (referential conceptions) and the other on the practice (structural conceptions). Participants´ coteaching meanings are determined by four qualitatively different understandings: cooperative teaching, collaborative teaching, pedagogical training, and critical pedagogy. When it comes to practice, the findings show eight categories, some of which have been previously described in narrative accounts about coteaching. The variability emerging from our findings highlights conceptual multiplicity rather than uniformity, thereby shedding light on the complexity of coteaching in post-secondary settings

Quantum-based solution of time-dependent complex Riccati equations

Using the Wei-Norman theory we obtain a time-dependent complex Riccati equation (TDCRE) as the solution of the time evolution operator (TEO) of quantum systems described by time-dependent (TD) Hamiltonians that are linear combinations of the generators of the $\mathfrak{su}(1,1)$, $\mathfrak{su}(2)$ and $\mathfrak{so}(2,1)$ Lie algebras. Using a recently developed solution for the time evolution of these quantum systems we solve the TDCRE recursively as generalized continued fractions, which are optimal for numerical implementations, and establish the necessary and sufficient conditions for the unitarity of the TEO in the factorized representation. The inherited symmetries of quantum systems can be recognized by a simple inspection of the TDCRE, allowing effective quantum Hamiltonians to be associated with it, as we show for the Bloch-Riccati equation whose Hamiltonian corresponds to that of a generic TD system of the Lie algebra $\mathfrak{su}(2)$. As an application, but also as a consistency test, we compare our solution with the analytic one for the Bloch-Riccati equation considering the Rabi frequency driven by a complex hyperbolic secant pulse generating spin inversion, showing an excellent agreement.Comment: 10 Pages, 1 Figur

Manejo prostodóntico convencional de una paciente con síndrome de CREST. Reporte de caso

ResumenEl síndrome de CREST se caracteriza por calcinosis, síndrome de Raynaud, dismotilidad esofágica, esclerodactilia y telangiectasia. Presenta signos y síntomas en el sistema estomatognático que merecen consideración en un tratamiento. El objetivo del presente artículo fue reportar las manifestaciones orales de un caso de síndrome de CREST y describir su tratamiento protésico realizado en el Departamento de Rehabilitación Oral de la Universidad Nacional de Colombia. Se reporta una paciente mujer de 42 años, con diagnóstico de síndrome de CREST por su médico tratante, que acude a la facultad de odontología para un tratamiento restaurador. El manejo prostodóntico incluyó coronas, prótesis parcial fija metal-cerámicas y prótesis parcial removible. Los resultados obtenidos nos permiten recomendar las alternativas restaurativas convencionales similares a las usadas en un paciente sin esta condición sistémica, pero manteniendo un control estricto.AbstractThe CREST syndrome is characterized by calcinosis, Raynaud's syndrome, esophageal dysmotility, sclerodactyly, and telangiectasia. It has signs and symptoms in the stomatognathic system that deserve consideration in its treatment. The objective of this paper is to report the oral manifestations of a case of CREST syndrome and describe the prosthetic treatment performed in the Department of Oral Rehabilitation in the National University of Colombia. The case is presented of a patient female aged 42 years, diagnosed with CREST syndrome by the treating doctor. She came to the Faculty of Dentistry for restorative treatment. The prosthodontic management included metal-ceramic crowns, fixed partial denture, and removable partial denture. The results demonstrate that conventional restorative alternatives, similar to that used in a patient without this systemic condition, while maintaining strict control of it, can be recommended

Toward coherent quantum computation of scattering amplitudes with a measurement-based photonic quantum processor

In recent years, applications of quantum simulation have been developed to study properties of strongly interacting theories. This has been driven by two factors: on the one hand, needs from theorists to have access to physical observables that are prohibitively difficult to study using classical computing; on the other hand, quantum hardware becoming increasingly reliable and scalable to larger systems. In this work, we discuss the feasibility of using quantum optical simulation for studying scattering observables that are presently inaccessible via lattice QCD and are at the core of the experimental program at Jefferson Lab, the future Electron-Ion Collider, and other accelerator facilities. We show that recent progress in measurement-based photonic quantum computing can be leveraged to provide deterministic generation of required exotic gates and implementation in a single photonic quantum processor.Comment: 26 pages, 7 figure

In situ microscopy of the self-assembly of branched nanocrystals in solution

Solution-phase self-assembly of nanocrystals into mesoscale structures is a promising strategy for constructing functional materials from nanoscale components. Liquid environments are key to self-assembly since they allow suspended nanocrystals to diffuse and interact freely, but they also complicate experiments. Real-time observations with single-particle resolution could have transformative impact on our understanding of nanocrystal self-assembly. Here we use real-time in situ imaging by liquid-cell electron microscopy to elucidate the nucleation and growth mechanism and properties of linear chains of octapod-shaped nanocrystals in their native solution environment. Statistical mechanics modelling based on these observations and using the measured chain-length distribution clarifies the relative importance of dipolar and entropic forces in the assembly process and gives direct access to the interparticle interaction. Our results suggest that monomerresolved in situ imaging combined with modelling can provide unprecedented quantitative insight into the microscopic processes and interactions that govern nanocrystal self-assembly in solution

Evaluando la usabilidad de aplicaciones interactivas en entornos de Televisión Digital

El alto porcentaje de penetración de la televisión en Colombia, así como el rápido despliegue que tendrá la Televisión Digital en el país los próximos años, tras el apagón analógico, hace necesario estudiar la Usabilidad de las aplicaciones pertenecientes a este medio de interacción, la cual es una característica de calidad fundamental para el éxito de dichas aplicaciones. La usabilidad es un concepto que incluye un conjunto de métricas y métodos con el objetivo de obtener sistemas fáciles de usar y de aprender. Los métodos de evaluación de usabilidad - MEU, que permiten medir los atributos de la usabilidad, son bastante diversos. Su realización depende de variables como: costos, disponibilidad de tiempo, recursos humanos, etc. Un buen número de MEU pueden ser realizados para evaluar aplicaciones de Televisión Digital Interactiva – TDi, pero la incógnita está en el nivel de información que obtiene cada uno de estos y/o la combinación de unos con otros. Este artículo presenta el análisis de un conjunto de MEU realizados sobre aplicaciones TDi, estableciendo una propuesta metodológica de evaluación de usabilidad, con el objetivo de obtener la mayor cantidad de información relevante sobre este tipo de aplicaciones.Facultad de Informátic