Valoración de respuestas a problemas de división-medida con fracciones por estudiantes para maestro

Esta investigación se centra en cómo estudiantes para maestro (EPM) valoran respuestas dadas por alumnos de 6o curso de primaria (11-12 años) a problemas de división-medida con fracciones y que han resuelto previamente. Los resultados muestran que (i) hubo EPM que aunque no resolvieron el problema correctamente sí valoraron adecuadamente la resolución de los alumnos de primaria, y (ii) la tendencia de algunos EPM a valorar mejor una respuesta con resultado correcto y procedimiento con errores que una respuesta con un procedimiento correcto pero con un error en la interpretación del resultado. Los resultados obtenidos constatan la potencialidad de las tareas propuestas para el desarrollo del conocimiento profesional de los EPM

Responsabilidad social: perspectiva del alumnado de Administración y Dirección de Empresas

[Resumen] En esta comunicación se recoge la perspectiva del alumnado perteneciente a primero del grado de Administración y Dirección de Empresas de la Facultad de Economía y Empresa, en la Universidade da Coruña durante el curso 2016-2017, en torno a la responsabilidad social. Este trabajo está dividido en tres fases, la primera, la recogida de información cuantitativa mediante un cuestionario estructurado, la segunda, el desarrollo de un trabajo cualitativo por parte del alumnado y la última fase, exposición y reflexión oral del alumnado en torno a la temática. En la primera fase de este trabajo se analiza el grado de conocimiento del concepto de la responsabilidad social; la identificación de las dimensiones de la responsabilidad social; la principal finalidad que percibe el alumnado para llevar a cabo políticas de responsabilidad social en las organizaciones; la clasificación de los sectores según su grado de implicación en materia de responsabilidad social (entre los que se encuadra la educación en comparación con otros sectores); la importancia de los requisitos para clasificar a las organizaciones como socialmente responsables; y los programas en los que desearía participar el alumnado una vez que finalicen sus estudios en la universidad

Structural model of corporate social responsibility. An empirical study on Mexican SMEs

[Abstract] Companies are increasingly aware of their role with regard to social responsibility in its three pillars: economic, social and environmental, with their different stakeholders. Facing the dilemma of choosing the model of social responsibility they should adopt, taking care of their organizational culture and their employees, with a global vision that the business world requires. However, it is not an easy task for small and medium enterprises, mainly because of their economic shortcomings in human resources and knowledge of how to be a socially responsible company. But they are aware that Corporate Social Responsibility (CSR) is an opportunity for development and differentiation in the market. Therefore, the objective of this research is to build, identify and validate a model of Social Responsibility in small and medium enterprises in Guanajuato, Mexico (CSRSMEs), on a sample of 226 SMEs, using as a basis the methodology of the international standard of Ethical and Socially Responsible Management System (SGE21). A quantitative approach was used and, a descriptive analysis, exploratory factor analysis and the structural equation modeling was applied. The results determine that the most relevant variables for being socially responsible are human capital, clients, supply chain, social environment and impact on the community, and organizational governance: Legality and Management System. It is drawn from this work that the flexibility of the so-called Ethical and Socially Responsible Management System has the empirical foundations needed. That is, from the perspective of the company’s management to consider the CSRSMEs model an opportunity to adopt and evaluate the areas of social responsibility management of any business structure in the SMEs in Mexico

Prolonged quiescence delays somatic stem cell-like divisions in Caenorhabditis elegans and is controlled by insulin signaling

Cells can enter quiescence in adverse conditions and resume proliferation when the environment becomes favorable. Prolonged quiescence comes with a cost, reducing the subsequent speed and potential to return to proliferation. Here, we show that a similar process happens during Caenorhabditis elegans development, providing an in vivo model to study proliferative capacity after quiescence. Hatching under starvation provokes the arrest of blast cell divisions that normally take place during the first larval stage (L1). We have used a novel method to precisely quantify each stage of postembryonic development to analyze the consequences of prolonged L1 quiescence. We report that prolonged L1 quiescence delays the reactivation of blast cell divisions in C. elegans, leading to a delay in the initiation of postembryonic development. The transcription factor DAF‐16/FOXO is necessary for rapid recovery after extended arrest, and this effect is independent from its role as a suppressor of cell proliferation. Instead, the activation of DAF‐16 by decreased insulin signaling reduces the rate of L1 aging, increasing proliferative potential. We also show that yolk provisioning affects the proliferative potential after L1 arrest modulating the rate of L1 aging, providing a possible mechanistic link between insulin signaling and the maintenance of proliferative potential. Furthermore, variable yolk provisioning in embryos is one of the sources of interindividual variability in recovery after quiescence of genetically identical animals. Our results support the relevance of L1 arrest as an in vivo model to study stem cell‐like aging and the mechanisms for maintenance of proliferation potential after quiescence.Spanish Ministerio de Economía y Competitividad (BFU2016-74949-P and BFU2012- 35509)European Research Council (ERC-2011-StG-281691)Marie-Curie Intra-European Fellowship (FP7-PEOPLE-2013- IEF/GA Nr: 627263

Comparison of architectures for PAPR reduction in OFDM combining pilot symbols with constellation extension

The Proceeding at: IEEE Eurocon Conference, took place at 2013, July 01-04, in Zagreb (Croacia)A main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems is that they suffer from a high Peak-to-Average Power Ratio (PAPR) at the transmitted signal. We propose three different architectures of a PAPR reduction technique combining pilot symbols with constellation extension. These architectures make use of a metric-based amplitude predistortion algorithm for the constellation extension embedded with orthogonal pilot symbols. Since neither the constellation extension nor the orthogonal pilots degrade the Bit Error Rate (BER), then the combined architectures also guarantee system performance. The three proposals outperform the previous algorithms (SAP and OPS) in terms of PAPR reduction, due to adequately joining pilots symbols with constellation extension. Moreover, the three architectures are examined from a complexity point of view, yielding a comparison in terms of computational load, what is straightforwardly related to implementation energy efficiency.This work has been partly funded by the Spanish national projects GRE3N-SYST (TEC2011-29006-C03-03) and COMONSENS (CSD2008-00010), and SENESCYT (Ecuador).Publicad

Energy Efficient Peak Power Reduction in OFDM with Amplitude Predistortion Aided by Orthogonal Pilots

The high Peak-to-Average Power Ratio (PAPR) is a main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems. We propose a two-step technique to reduce the PAPR consisting of a metric-based constellation extension method, such as Simple Amplitude Predistortion (SAP) algorithm, aided by Orthogonal Pilot Sequences (OPS) in a previous step, where we also provide a low-complex implementation of OPS scheme. We show that our proposal, named OP-SAP, outperforms previous approaches in terms of PAPR reduction, due to joining the benefits of Orthogonal Pilots with SAP algorithm. Moreover, it is energy efficient within two aspects: transmitted energy and implementation energy. OP-SAP saves up to 57% of transmitted energy per predistorted symbol compared to SAP. Regarding implementation energy, PAPR reduction techniques introduce some additional computational complexity, which requires extra cycles in the processor that demand energy consumption. We present an exhaustive analysis on computational power cost that shows the low power consumption of OP-SAP compared to other methods as SeLected Mapping (SLM), what yields a remarkable energy saving in its practical implementation.This work was supported in part by the Spanish National Projects GRE3N-SYST (TEC2011-29006-C03-03) and COMONSENS (CSD2008-00010), Fundación Carolina (Spain), and SENESCYT (Ecuador).Publicad

Sustentos teóricos que fundamentan la influencia del contexto comunitario en el Desarrollo Infantil Integral de los niños de 0-5 años

This article responded to a result of the research project "Influence of the Batallón del Suburbio community in the South of Guayaquil, in the Comprehensive Child Development of children from 0 to 5 years old", implemented by the Comprehensive Child Development career of the Technological University Espiritu Santo in the year 2021. Statistical data from previous investigations carried out by the Statistics Department of the Santiago de Guayaquil Health Center, confirmed the presence of 2,021 children from 0 to 5 years old in this sector. Existing in these families lack of concern for the good integral child development. All of which led to the following research problems: How to improve the influence of the families of the Batallón del Suburbio community on the Comprehensive Child Development of children from 0 to 5 years of age? What theoretical support bases the influence of the community context on the Comprehensive Child Development of children aged 0-5? Said research was projected as a general objective “To systematize the theoretical supports that base the Comprehensive Child development of children aged 0-5 years in a community context. The research was of an explanatory or non-experimental causal type and resulted in a theoretical framework of reference for the assessment of the Comprehensive Child Development of children from 0 to 5 years of the Batallón del Suburbio community. Theoretical methods such as deductive, synthetic analytical, comparative historical and qualitative research method were used.El presente artículo respondió a un resultado del proyecto de investigación “Influencia de la comunidad Batallón del Suburbio en el Sur de Guayaquil, en el Desarrollo Infantil Integral de los niños de 0 a 5 años”, implementado por la carrera Desarrollo Infantil Integral del Tecnológico Universitario Espíritu Santo en el año 2021. Datos estadísticos de investigaciones previas realizadas por el Departamento de Estadística del Centro de Salud Santiago de Guayaquil, confirmaron la presencia de 2.021 niños de 0 a 5 años en este sector. Existiendo en dichas familias falta de preocupación por el buen desarrollo infantil integral. Todo lo cual condujo a los siguientes problemas de investigación ¿Cómo mejorar la influencia de las familias de la comunidad Batallón del Suburbio en el Desarrollo Infantil Integral de los niños de 0 a 5 años?  ¿Qué sustento teórico fundamenta la influencia del contexto comunitario en el Desarrollo Infantil Integral de los niños de 0-5 años?  Dicha investigación se proyectó como objetivo general “Sistematizar los sustentos teóricos que fundamentan el desarrollo Infantil Integral de los niños de 0-5 años en un contexto comunitario. La investigación fue de tipo explicativa o causal no experimental y tuvo como resultado un marco teórico de referencia para la valoración del Desarrollo Infantil Integral de los niños de 0 a 5 años de la comunidad Batallón del Suburbio. Se usaron métodos teóricos como el deductivo, analítico sintético, histórico comparativo y método de investigación cualitativa

Performance of OPS-SAP technique for PAPR reduction in IEEE 802.11p scenarios

Vehicular Ad Hoc Networks (VANETs) are wireless networks that emerged thanks to the rapid evolution of wireless technologies and the automotive industry. The IEEE 802.11p standard is part of a group of standards related to all layers of protocols for Wireless Access in Vehicular Environment (WAVE) communications, which defines Medium Access Control (MAC) and Physical (PHY) levels. The PHY layer of IEEE 802.11p is essentially based on Orthogonal Frequency Division Multiplexing (OFDM) due to its advantages. However, OFDM signal suffers from high Peak-to-Average Power Ratio (PAPR) at the transmitter side, which causes a significant power efficiency penalty. An efficient peak power reduction technique is Simple Amplitude Predistortion aided by Orthogonal Pilot Sequences (OPS-SAP), which consists in moving certain outer constellation points of the frequency-domain OFDM symbol. In this paper, we propose the application of this OPS-SAP scheme in the IEEE 802.11p scenario, and, moreover, its evaluation under a complete PHY layer.This work has been supported by the Spanish National Projects GRE3N-SYST (TEC2011-29006-C03-03) and ELISA (TEC2014-59255-C3-3-R) and also by Escuela Politécnica a Nacional (Ecuador) by PII-DETRI-01-2016 Project

Social responsibility in the textile industry

[Resumo] A responsabilidade social empresarial (RSE) é un tema de actualidade, que evoluciona con rapidez a medida que as compañías de todo o mundo se encamiñan cara a un modelo de negocio futuro máis responsable coa sociedade e o medio. Neste traballo analízanse e compáranse os tipos de iniciativas de RSE enfocadas aos recursos humanos e os grupos de interese externos que as cinco compañías principais do sector téxtil –Inditex, Primark, Cortefiel, Levi Strauss & Co. e Adidas– están a poñer en marcha, mediante o uso da metodoloxía do estudo de casos múltiple. Con isto preténdese comprender o alcance da responsabilidade social destas empresas, así como o seu nivel de implicación e adaptación no tocante ao concepto de responsabilidade social, polos valores e as obrigas morais e legais que implica. Conclúese que as empresas máis comprometidas na realización de actividades enfocadas aos grupos de interese, tanto internos como externos, son Inditex e Adidas[Abstract] The Corporate Social Responsibility (CSR) is a hot topic nowadays that evolves quickly in such a way that many companies around the world head towards a more responsible future with society and the environment. This paper analyses the typology of the CSR initiatives that are focused on human resources and external stakeholders made by the five main textile companies –Inditex, Primark, Cortefiel, Levi Strauss & Co and Adidas–, using the multiple case-studies methodology. This designed methodology enables the understanding of the CSR reach in textile industry enterprises, as well as the level of implication and adaptation to the concept of Social Responsibility, values, moral and legal obligations of the five analysed companies. It is concluded that the companies that are more committed to the realization of activities focused on stakeholders, both internal and external, are Inditex and Adidas Group

Los tecno recurso laborales y su impacto en el tecnoestrés. Un caso empírico

[Abstract]: The information and Communication Technologies (ICT) have changed how the professors in the Higher Education Institutions (HEI) conduct their activities that benefits their work and personal routines. Nevertheless, the lack of proper ICT tools needed to its implementation (Lack of Work Techno-resources-LWTR) causes stress disturbances, affecting the professor’s health. This research focuses in determine if the LWTR is defined by psychosocial factors as Techno-anxiety and Inefficiency. Also to understand if those factors contribute to the level of technostress in professors of the HEI in the Laja-Bajio region of Guanajuato, Mexico. The analysis includes a sample of 415 professors, and a descriptive, correlational and regression analysis. Results points that professors consider ICT as a factor to increase their self-efficiency, their work in teams and their autonomy, having enough technological equipment to accomplish their work activities. Results also showed that the Techno- anxiety is the factor that mostly influences in the Technostress. Besides, the multiple regression analysis determines the Lack of Work Techno-resources in the professors. In conclusion, this paper contributes to the knowledge of which factors, caused by the ICT, contributes to stress in higher education professors.[Resumen]: Las tecnologías de la Información y Comunicación (TIC) han cambiado la forma de realizar las actividades de los docentes de las Instituciones Educativas de nivel Superior que benefician sus actividades laborales y personales. Sin embargo, si no cuentan con los recursos tecnológicos necesarios y suficientes para utilizar las TIC, la Falta de Tecno-Recursos Laborales (FTRL) pueden generar alteraciones en los niveles de estrés que inclusive afectan su salud. Por ello el objetivo de esta investigación fue determinar si el FTRL está definido por los factores psicosociales tecno-ansiedad e ineficacia y si estos contribuyen al nivel de tecno-estrés en los docentes de nivel superior de la Región Laja-Bajío. Con una muestra de 415 docentes, se realizó un análisis descriptivo, correlacional y de regresión. Los resultados señalan que los docentes consideran que las TIC incrementan su autoeficiencia, le facilitan el trabajo en equipo, les permiten autonomía y consideran que cuentan con el equipo tecnológico para realizar sus actividades laborales. También se encontró que la Tecno-ansiedad es la variable que mayormente influye en Tecno-estrés en relación a la ineficacia. Por último, mediante el análisis de regresión múltiple se determinó que, la Falta de Tecno-recursos laborales está determinada tanto por la Tecno-ansiedad como por la Ineficacia, y que ambas contribuyen al nivel de tecno-estrés en el docente de las Instituciones de Educación Superior de la Región Laja-Bajío, Guanajuato, México. Este articulo contribuye al conocimiento de los factores que contribuyen al estrés de los docentes de nivel superior causados por las TIC