El enfoque sociocultural en educación matemática desde la perspectiva de estudiantes para profesor: una aproximación inicial desde sus concepciones

El enfoque socio-cultural en educación matemática presenta algunos elementos que hasta hace algunos años eran invisibles o no tenían importancia en la enseñanza de las matemáticas, entre ellos la importancia del contexto, las interacciones sociales en el aula de clase y los aportes de espacios extra escolares a la escuela, en el presente documento se muestra una aproximación inicial sobre algunas concepciones de un grupo de estudiantes para profesor de la licenciatura en educación básica con énfasis en matemáticas de la universidad distrital (LEBEM), por medio de una aplicación de una encuesta tipo Likert, el análisis pretenderá buscar algunas interpretaciones y comprensiones sobre las respuestas propuestas por los estudiantes

CLU Business Plan

Description: This student has created a management/booking agency to support mid-level and well known independent music projects in their professional career.https://remix.berklee.edu/graduate-studies-global-entertainment-business/1006/thumbnail.jp

It´s Not My Money: An Experiment on Risk Aversion and the House-money Effect

The house-money effect -people´s tendency to be more daring with easily-gotten money- is abehavioral pattern that poses questions about the external validity of experiments in economics: to what extent do people behave in experiments like they would have in a real-life situation, given that they play with easily-gotten house money? We ran an economic experiment with 66 students to measure the house-money effect on their risk preferences. They received an amount of money with which they made risky decisions involving losses and gains; a treatment group got the money 21 days in advance and a control group got it the day of the experiment. We find that, when facing possible losses, people in the treatment group showed a lower tolerance to risk than people in the control group. If the players are assumed to have a CRRA utility function and to behave according to expected-utility theory, the risk-attitude adjustment corresponds to an average increase of 1 in their risk aversion coefficient. While the exact pattern of this house-money adjustment differs by gender, it is not possible to determine the sign of this gender effect unambiguously. In any case, it is advisable to include credible controls for the house-money effect in experimental work in economics.House-money effect, risk aversion, prospect theory, economic experiment, external validity.

Photonic crystal-driven spectral concentration for upconversion photovoltaics

International audienceThe main challenge for applying upconversion (UC) to silicon photovoltaics is the limited amount of solar energy harvested directly via erbium-based upconverter materials (24.5 W m(-2)). This could be increased up to 87.7 W m(-2) via spectral concentration. Due to the nonlinear behavior of UC, this could increase the best UC emission by a factor 13. In this paper, the combined use of quantum dots (QDs)for luminescent down-shiftingand photonic crystals (PCs)for reshaping the emissionto achieve spectral concentration is shown. This implies dealing with the coupling of colloidal QDs and PC at the high-density regime, where the modes are shifted and broadened. In the first fabricated all-optical devices, the spectral concentration rises by 67%, the QD emission that matches the absorption of erbium-based upconverters increases by 158%, and the vertical emission experiences a 680% enhancement. Remarkably, the PC redshifts the overall emission of the QDs, which could be used to develop systems with low reabsorption losses. In light of this, spectral concentration should be regarded as one of the main strategies for UC photovoltaics

Buenas prácticas agrícolas para la conservación del recurso hídrico en la cuenca media-alta del río Otún. Caso de estudio, cultivo de cebolla

En el marco del trabajo investigativo "Buenas prácticas agrícolas para la conservación del recurso hídrico en la cuenca media del río Otún". Caso de estudio cultivo de cebolla junca (Allium Fistolosum), se ha querido contribuir con el análisis de las Buenas Prácticas Agrícolas (BPA) en torno a los cultivos de esta hortaliza en diferentes predios seleccionados mediante una muestra aleatoria. Las BPA están orientadas por un grupo de normas que tienen como objeto crear recomendaciones técnicas en pro de la calidad en la producción, transformación y transporte de los alimentos, además de promover la protección de la salud de los consumidores y la mejora continua de las condiciones laborales de los agricultores, haciendo énfasis en la conservación del medio ambiente

The Effect of Teachers` Language Proficiency on Teaching Methodology at Institute Benjamin Zeledón of Managua

Knowledge of English language represents one of the essential requirements of today´s society. Besides other skills, it is considered as one of the most influential factors when applying for a job or maintaining a particular work position, which is often conditional to the advancement of a language level. Since the ability to communicate in English has become a necessity in human life, people take advantage of different opportunities to acquire it. The best and most natural way to learn this language is to study it in an English peaking country. Being exposed to a foreign language abroad without no interference of a mother tongue is undoubtedly the most beneficial and fastest way to improve language skills. However, not everyone is provided with such an opportunity. Therefore, the only chance most of people have is learning English in Secondary school, and taking in account the factor that the Nicaraguan Educational System does not include in its curriculum teaching English during the first years in school, that is preschool and primary school, as a result the transition to secondary school is affected by the inclusion of teaching a language in students` curriculum, this can be overwhelming and intimidating for students; therefore some teacher try to engage the students in the class by speaking and communicating in the mother tongue, in our case in Spanish, they consider student are more eager to learn the language if they use Spanish than using a language they cannot pronounce or understand. This research intends to analyze how this decision affects the learning process and if it is more effective than using English to motivate the students to produce the target language