Learning a foreign language with a collaborative web-based task, processes and performances. Apprendre une langue étrangère à partir d\u27une tâche collaborative sur Internet : processus et performances

Within language teaching and learning, tasks have been advocated for use as they are thought to set up ideal conditions for language acquisition to occur. With the emergence of the Internet in the last decade, and the deployment of technology in schools, Web-based tasks, referred to as Computer-assisted Language Learning (CALL) are being used by an increasing number of teachers. Teachers who employ Web-based tasks in their classrooms, commonly set these up so that learners complete them in a collaborative mode. This requires learners engaging in a process of task negotiation and, at times, task redefinition, which in turn requires more than just linguistic knowledge from the learners. The purpose of the present research was to identify the impact of Web-based tasks both on the learning process and the learners’ performances. Three intact classes from French high schools, consisting of learners of English as a foreign language, completed a Web-based task. The product of the different stages of its completion and the corresponding video recordings were the database for this study. Attitude questionnaires and cultural awareness tests were also collected and analyzed. In doing so, issues of attitudes and motivation as well as learner competence and language proficiency were examined. These were documented in different experimental settings, including in turn ICT and/or collaboration. The results suggest tasks, whether Web-based or not, do not hinder language production and, in fact, learners respond favourably to them, especially when working collaboratively. Further, the study shows that collaboration has measurable positive effects on the learners’ attitudes, processes and performances. These include: positive outcomes in relation to the learners’ persistence of effort; their involvement with the task; their understanding of the task’s implicit demands; their quality of writing; the products they ultimately produce; and the processing of higher-order skills. Yet the findings also suggest that these benefits are somehow diminished when technology is used, although this in turn is affected by the learners’ familiarity with the tasks and their levels of technological literacy. Even so, these results raise the question of how Web-based tasks can be best implemented in language classrooms, and suggest that further research is still required in this area

Exploring Pyrochlore Host for Upconversion and Downconversion Luminescence Materials

Pyrochlore has been the focal point of research in materials science community in the area of nuclear waste host, thermal barrier coatings, solid oxide fuel cell, catalyst, magnetism, luminescence etc. Such application arises due to their unique properties such as wide band gap, high radiation stability, low thermal conductivity, high dialectic constant. The fact it also has high structural ability, low phono energy and ability to accommodate dopant ion at both A- site and B-site; they are considered excellent host for inorganic phosphors. Here research work is directed towards synthesizing optical materials having high quantum efficiency for down-conversion (DC) and up-conversion (UC). Molten salt synthesis because of its several benefits such as low temperature synthesis, friendly environmental process, and low cost are expected to produce high quality cost effective, pyrochlore nanoparticles with A2B2O7 which is expected to show high quantum yield due to unique f-f transition of lanthanide ion and host to lanthanide energy transfer.We believe by suitable tuning of dopant ion its concentration, annealing time, annealing temperature, we will be able to produce small size luminescent nanoparticles of A2B2O7 for upconversion and downconversion suitable by bio imaging and solid state lighting

HAPI Prevention Bundle: An Initiative to Prevent Hospital-Acquired Pressure Injuries

Problem: Hospital-Acquired Pressure Injuries (HAPI) are a serious health problem as they increase patient morbidity and mortality. They are detrimental to patients, families, and healthcare systems. Context: Research supports HAPI prevention bundles are a way to standardize care processes and reduce the incidence of pressure injuries. This evidence-based practice intervention was initiated to develop a HAPI prevention bundle in an adult Medical-Surgical Telemetry unit. A literature review was conducted to identify the best HAPI prevention practices. Intervention: The evidence-based pressure injury preventive bundle includes interventions consistent with proper skin assessments and documentation, patient risk identification, development of Wound Care Champions, routine huddle attendance, proper education, and continuous training. Measures: Wound, ostomy, and continence nurses, bedside nurses, nurse leaders, and Quality Improvement (QI) specialists participated in the development of the bundle. Nursing questionnaires, chart audits, and interviews were conducted. Pre-implementation HAPI incidences and sentinel events were reviewed. Results: Post-implementation findings will be conducted at 12 months after bundle implementation to determine a significant reduction of HAPI incidence. Conclusion: An evidence-based bundle initiative was developed in an adult Medical-Surgical Telemetry unit to reduce the incidence of HAPIs and standardize the process for pressure injury prevention. Staff engagement and leadership involvement are essential to the success of this EBP intervention. The goal is to integrate the bundle and decrease the number of HAPIs in the unit

High repetition rate femtosecond laser heat accumulation and ablation thresholds in cobalt-binder and binderless tungsten carbides

Femtosecond (fs) laser ablation has been studied for the potential of fast, high precision machining of difficult-to-machine materials like binderless tungsten carbide. Obstacles that have limited its efficiency include melting from heat accumulation (HA), particle shielding, and plasma shielding. To address HA without shielding effects, high repetition rate (57.4 MHz), ultra-low fluence fs laser irradiation is performed to study the incubation effect and subsequent HA-ablation threshold of fine-grained tungsten carbides. Exposure times on the order of 100 ms were conducted in air with fluences (1.82 to 9.09 mJ/cm2) two orders of magnitude below the single fs pulse ablation thresholds reported in literature (0.4 J/cm2). Heat accumulation at high repetition rate explains the ultra-low fluence melt threshold behavior resulting in melt crowns around ablated holes and grooves. The results of this study aid in predicting heat buildup in high repetition rate laser irradiation for applications that wish to achieve high ablation rates of difficult-to-machine, ultrahard materials and help enable shaping of binderless tungsten carbide for use in applications too extreme for bindered tungsten carbide

Análisis de las estrategias para la solución de una situación problema de dirección y orientación espacial en transición

La investigación vio la necesidad de mejorar los procesos de enseñanza y de aprendizaje de las diferentes nociones espaciales en dirección y orientación, de acuerdo con los planes de estudio elaborados por los maestros. Muestra que aun para los niños de grado transición, es difícil reconocer el uso de las nociones de dirección y orientación espacial, interviniendo aspectos importantes como el uso de estrategias para dar solución a ciertas situaciones, en las cuales se hace necesario tomar como referente fundamental la teoría de la resolución de problemas infantiles en donde utilizan una serie de estrategias de lenguaje propuestas por Jerome Bruner, y Lev Vygostky. La resolución de la situación problema da a conocer las diferentes estrategias usadas por los niños en la solución de una situación problema respecto a la dirección y orientación espacial elaborada bajo las fases de enseñanza de Van Hiele.The research was the need to improve the teaching and learning of different spatial notions direction and guidance, according to the curriculum developed by teachers. It shows that even for children of grade transition, it is difficult to recognize the use of the concepts of direction and spatial orientation, intervening important aspects such as the use of strategies for solving certain situations in which it is necessary to take as the fundamental reference theory of problem solving where children use a range of language strategies proposed by Jerome Bruner, and Lev Vygotsky. The resolution of the problem situation discloses the different strategies used by children in solving a problem situation to the direction and spatial orientation phases prepared under Van Hiele teaching

La falsificación de obras arte, su régimen de verdad y su tratamiento en Colombia

Art forgery is an uncommon subject in national doctrine and a subject which is less commonly written about in international doctrine. Most doctrinal and jurisprudential sources commonly refer to forgery as falsifying public or private documents and the issues that surround it. Therefore, art forgery presents a great legal challenge as it is not only premised on a physical change but also on a modification of the truth contained in the object of forgery. This article investigates themes such as: the truth within works of art, the definition of a work of art, and many other concepts that are related to these topicsLa falsificación de obras de arte es un tema extraño a la doctrina nacional. En la práctica jurídica usual se estudian a fondo los temas que orbitan alrededor de la falsificación de una obra de arte, principalmente la falsedad en documentos públicos o privados (arts. 286 y ss. Código Penal) y el delito de estafa (art. 246 C.P.). Sin embargo, y tal como se demuestra a lo largo de esta investigación, el problema va más allá de la falsedad y la estafa, por el contrario y abordando el régimen de verdad propio de las obras, se aproxima a una definición conceptual de lo que se entiende por falsedad en una obra de arte, al igual que se describe la naturaleza de las obras de arte y el tratamiento que el operador jurídico les debe dar en relación con la figura de la falsedad al momento de enfrentar el reto jurídico que supone dicha situació

La falsificación de obras arte, su régimen de verdad y su tratamiento en Colombia

Art forgery is an uncommon subject in national doctrine and a subject which is less commonly written about in international doctrine. Most doctrinal and jurisprudential sources commonly refer to forgery as falsifying public or private documents and the isLa falsificación de obras de arte es un tema extraño a la doctrina nacional. En la práctica jurídica usual se estudian a fondo los temas que orbitan alrededor de la falsificación de una obra de arte, principalmente la falsedad en documentos públicos o pr

Responsabilidad civil extracontractual por los daños inferidos al hijo extramarital por falta de reconocimiento voluntario de la paternidad en Colombia

Este artículo analiza la problemática de la falta de reconocimiento voluntario de la paternidad en Colombia a la luz del derecho de la responsabilidad civil, esto, con la finalidad de extraer criterios que permitan el planteamiento de una pretensión resarcitoria por el daño inferido al hijo con dicho comportamiento ilícito.This article analyzes the problem of the lack of voluntary acknowledgement of paternity in Colombia according to tort law. The aim is to establish criteria that would permit claim compensations for the damage caused to the child by such unlawful conduct.Magíster en Derecho Privado, Persona y Sociedad con énfasis en Responsabilidad Contractual y Extracontractual Civil y del EstadoMaestrí