Validación de contenido de un formato para auditar espacios recreo deportivos educativos de Bogotá, Colombia

Introducción: El espacio recreo deportivo escolar juega un papel muy importante, en la creación de condiciones adecuadas para mejorar los procesos de enseñanza-aprendizaje. Contar con infraestructura escolar adecuada permite mejorar la calidad de la educación. Objetivo: Diseñar y establecer la validez de contenido del formato de auditoria espacios recreo-deportivos educativos institucionales (FAERDEI), el cual permite caracterizar los espacios recreo-deportivos utilizados por escolares de primaria durante el recreo, para así fortalecer los planes educativos que inciden en la promoción de actividad física. Metodología: estudio de validación de escalas, que determinó la validez de contenido del formato FAERDEI como parte del marco del proyecto: “Niveles de actividad física y su relación con los espacios recreo deportivos escolares en instituciones educativas distritales”, desarrollado en cinco instituciones educativas distritales de la ciudad Bogotá, 2015. Resultados: El formato presentó un índice de Kappa de (0,73); para las dimensiones de accesibilidad de (0,70) de funcionalidad de (0,73) y contaminantes de (0,76). Conclusión: El formato FAERDEI cumple con criterios suficientes para ser considerados una herramienta válida y fiable que caracteriza los espacios recreo deportivos de las instituciones educativas de forma fácil y a bajo costo.Introduction: The recreational school sports space plays a very important role in creating appropriate conditions to improve the teaching-learning processes. Having adequate school infrastructure can improve the quality of education. Objectives: To design and to establish the validity of content of the format of audit of recreational-sporting educational institutional spaces (FAERDEI), which allows to characterize the recreational-sporting spaces used by elementary schoolchildren during recess, in order to strengthen the educational plans that affect the promotion of physical activity. Methodology: Scale validation study that determined the validity of format (FAERDEI) content as part of the project framework: “levels of physical activity and their relationship with the recreational-sporting school spaces in public educational institutions,” developed in five pubic educational institutions of the city of Bogotá, 2015. Results: the format presented a Kappa index of (0,73); for the accessibility dimensions of (0,70) functionality of (0,73) and contaminants of (0,76) Conclusion: The format (FAERDEI) complies with sufficient criteria to be considered a valid and reliable tool that characterizes the recreational-sporting spaces of educational institutions in an easy and low cost

Las biografías científicas en el aula de clase. Una nueva propuesta que integra creatividad y aprendizaje del conocimiento científico escolar

En el ámbito de la formación de profesores, y en particular en la línea de investigación sobre Historia de la Ciencia, Epistemología y Formación docente, se presenta esta Investigación (en etapa de análisis), cuyo propósito está orientado al diseño e implementación de nuevas propuestas de actividades para la enseñanza de la química, desde la elaboración de biografías científicas como recurso de creaciones narrativas en el aula de ciencias. Se considera la importancia del lenguaje científico, las habilidades cognitivolingüísticas, la resolución de problemas y el desarrollo de la creatividad, en el marco de la perspectiva biográfica de la Historia de la Ciencia, para la generación de un nuevo ambiente en el aula, que fortalezca la comunicación científica, los procesos formadores de los profesores y el aprendizaje de la química escolar

Strategic plan to improve professional skills in English inside commercial areas of Colombian companies, based on autonomous learning

This research project establishes a complete proposal of a strategic plan which pretends to be a tool for learning English in autonomous ways, specifically applied in commercial areas from Colombian companies, using as diagnosis structure a SWOT analysis (Strengths, Weaknesses, Opportunities and Threats), used in lots of companies because of its high effectiveness level related to strategic results; in fact this method accurately allows to identify which factors permit and which other affect an English learning process, especially when are involved self-directed and autonomous methodologies, those have bigger risks of dropping out the English courses than traditional studying methods. This research as well pretends to improve the commercial procedures highlighting the importance of English and intercultural communication during international trade agreements. In addition; this project uses as basis some of the internationalization proposals established by government, some governmental organizations and the company used for finding out the need of interpreting English inside the commercial area.Abstract Acknowledgements Table of Contents List of Tables List of Figures Introduction CHAPTER I RESEARCH PROBLEM STATEMENT 1 A Description of the Research Problem: Problem’s definition B Research Questions C Rationale D General and Specific Objectives CHAPTER II THEORETICAL FRAMEWORK A Dynamics for Business Intercultural Communication, International Relations and Issues 1 Description of the current need of business English in commercial areas 2 Definition of the Colombian business culture 3 Examination of the corporate second language importance for an enterprise based on the theory of second language acquisition by Krashen 4 Colombian linguistics policies from El Ministerio de Educación Nacional: Plan Nacional de Bilingüismo B Statement of Theoretical Assumptions 1 Background of autonomous learning concept: model, characteristics and theory 2 The role of e-learning and ICTs nowadays 3 Common European framework of reference for language learning, teaching and assessment (CEFR) 4 Theoretical Analysis of Pedagogical Basis, Model for autonomously teaching and learning 5 Cognitive agent, continuous models and inductive logic programming from audio-visual input C Establishment of Strategic Planning on Labor Context 1 Description of the ranges and effects of this type of planning 2 Strategic plan influences within a company 3 Usefulness, relevance and relation of strategic plans within the commercial corporative structure and the intercultural businesses CHAPTER III METHODOLOGY A Type of Research 1 Research Methodology: Research Exchange - Explanatory B Population and Sample selection criteria C Collecting Data Instrument 1 Methodological structure D Research Results CHAPTER IV STRATEGIC PLAN PRESENTATION A Statement of the Strategic Plan Phases 1 Situation analysis 2 Situation diagnosis 3 General and specific objectives 4 Strategies for autonomous English learning – SWOT analysis 5 Action plan, Plan tracing and assessment CHAPTER V GENERAL CONCLUSIONS AND RECOMMENDATIONS References and BibliographyPregradoProfesional en Lenguas ModernasLenguas Moderna

Biopesticide activity from drimanic compounds to control tomato pathogens

Indexación: Scopus.Tomato crops can be affected by several infectious diseases produced by bacteria, fungi, and oomycetes. Four phytopathogens are of special concern because of the major economic losses they generate worldwide in tomato production; Clavibacter michiganensis subsp. michiganensis and Pseudomonas syringae pv. tomato, causative agents behind two highly destructive diseases, bacterial canker and bacterial speck, respectively; fungus Fusarium oxysporum f. sp. lycopersici that causes Fusarium Wilt, which strongly affects tomato crops; and finally, Phytophthora spp., which affect both potato and tomato crops. Polygodial (1), drimenol (2), isonordrimenone (3), and nordrimenone (4) were studied against these four phytopathogenic microorganisms. Among them, compound 1, obtained from Drimys winteri Forst, and synthetic compound 4 are shown here to have potent activity. Most promisingly, the results showed that compounds 1 and 4 affect Clavibacter michiganensis growth at minimal inhibitory concentrations (MIC) values of 16 and 32 μg/mL, respectively, and high antimycotic activity against Fusarium oxysporum and Phytophthora spp. with MIC of 64 μg/mL. The results of the present study suggest novel treatment alternatives with drimane compounds against bacterial and fungal plant pathogens. © 2018 by the authors.https://www.mdpi.com/1420-3049/23/8/205

A 2x2 MIMO DVB-T2 System: Design, New Channel Estimation Scheme and Measurements With Polarization Diversity

The increasing interest in MIMO (Multiple-Input Multiple-Output) systems has given rise to a prolific research activity in recent years. Both theoretical and practical issues have been studied. However, so far few MIMO testbeds or prototypes have been built for DVB-T or future standards. In this paper, a novel 2 × 2 MIMO testbed specifically designed for evaluating the performances of a DVB-T2 MIMO system is presented. The description of signal processing is detailed including a new scheme to estimate the MIMO channel matrix. Finally, measurement results with different polarization schemes are presented for typical scenarios, obtaining higher capacity in LoS situations using polarization diversity

Desarrollo embrionario y larval de Feltia subterranea Fabricius (Lepidoptera: Noctuidae) en Cuba

In the present work, aspects of the duration of the embryonic and larval development of the granulated cutworm Feltia subterranea Fabricius are described. The first generation of larvae was found feeding on tomato seedlings (Solanum lycopersicum L.) at the “Las Piedras” farm in Guanabacoa, Havana, Cuba, in October 2017. For the insect rearing, larvae were transferred to the Entomology-Acarology laboratory of the National Center for Agricultural Health (CENSA)They were kept independently in mesh cages, and tomato seedlings of the angean variety were used for their feeding until the end of that phase. In the adult phase, females and males were independently mated and observed daily to determine the time that oviposition occurred and duration of this phase. Eggs deposited on the same day were used to determine the time taken by embryonic development, duration of the larval stage, and the number of larval stages. Embryonic development took 4 days. The eggs were always deposited in clusters on young plant leaves. The insect presented six larval stages and the larval period lasted 15 days. A gregarious behavior, more marked during the first instars, was observed during the larval phase.En el presente trabajo se describen aspectos sobre la duración del desarrollo embrionario y larval del gusano cortador granulado Feltia subterranea Fabricius. La primera generación de larvas se encontró alimentándose sobre plántulas de tomate (Solanum lycopersicum L.) en la finca “Las Piedras” del municipio Guanabacoa, La Habana, Cuba, el mes de octubre de 2017. Para el establecimiento de la cría, se trasladaron larvas al laboratorio de Entomología-Acarología del Centro Nacional de Sanidad Agropecuaria (CENSA) y se mantuvieron de forma independiente en jaulas de malla. Se utilizaron plántulas de tomate de la variedad angean para su alimentación hasta concluir esa fase. En la fase adulta, se realizaron apareamientos de hembras y machos de forma independiente; se realizaron observaciones diarias para determinar el momento de oviposición y su duración. Los huevos depositados en un mismo día se emplearon para determinar el tiempo de desarrollo embrionario, la duración de la fase larval y el número de estadios larvales. El desarrollo embrionario demoró cuatro días. Los huevos siempre se depositaron en grupos en hojas jóvenes de las plantas. El insecto presentó seis estadios larvales y el periodo larval duró 15 días. Se observó un comportamiento gregario durante la fase larval, más marcado durante los primeros instares

Computer-assisted dental implant placement following free flap reconstruction: virtual planning, CAD/CAM templates, dynamic navigation and augmented reality

Image-guided surgery, prosthetic-based virtual planning, 3D printing, and CAD/CAM technology are changing head and neck ablative and reconstructive surgical oncology. Due to quality-of-life improvement, dental implant rehabilitation could be considered in every patient treated with curative intent. Accurate implant placement is mandatory for prosthesis long-term stability and success in oncologic patients. We present a prospective study, with a novel workflow, comprising 11 patients reconstructed with free flaps and 56 osseointegrated implants placed in bone flaps or remnant jaws (iliac crest, fibula, radial forearm, anterolateral thigh). Starting from CT data and jaw plaster model scanning, virtual dental prosthesis was designed. Then prosthetically driven dental implacement was also virtually planned and transferred to the patient by means of intraoperative infrared optical navigation (first four patients), and a combination of conventional static teeth supported 3D-printed acrylic guide stent, intraoperative dynamic navigation, and augmented reality for final intraoperative verification (last 7 patients). Coronal, apical, and angular deviation between virtual surgical planning and final guided intraoperative position was measured on each implant. There is a clear learning curve for surgeons when applying guided methods. Initial only-navigated cases achieved low accuracy but were comparable to non-guided freehand positioning due to jig registration instability. Subsequent dynamic navigation cases combining highly stable acrylic static guides as reference and registration markers result in the highest accuracy with a 1-1.5-mm deviation at the insertion point. Smartphone-based augmented reality visualization is a valuable tool for intraoperative visualization and final verification, although it is still a difficult technique for guiding surgery. A fixed screw-retained ideal dental prosthesis was achieved in every case as virtually planned. Implant placement, the final step in free flap oncological reconstruction, could be accurately planned and placed with image-guided surgery, 3D printing, and CAD/CAM technology. The learning curve could be overcome with preclinical laboratory training, but virtually designed and 3D-printed tracer registration stability is crucial for accurate and predictable results. Applying these concepts to our difficult oncologic patient subgroup with deep anatomic alterations ended in comparable results as those reported in non-oncologic patients.This work was supported by grant PI18/01625 (Ministerio de Ciencia e Innovación-Instituto de Salud Carlos III and European Regional Development Fund "Una manera de hacer Europa"). This study was also supported by Ticare® implants (Mozo-Grau, Valladolid, Spain). The funder was not involved in the study design, collection, analysis, interpretation of data, the writing of this article or the decision to submit it for publication

Módulo de procesado de señal de un MIMO-testbed OFDM para medidas de antenas reconfigurables

Multiple-Input Multiple-Output (MIMO) systems have been considered as a solution to increase the data rate and quality of signals in the next generation wireless communication systems. The performances of these systems depend on three main aspects: channel propagation characteristics, processing algorithms and antenna array configurations. In order to obtain MIMO channel measurements at ISM band (2.45 GHz) taken into account the use of different antennas such as reconfi- gurables, a MIMO-testbed which uses OFDM technique has been designed and implemented in order to carry out the measurements in indoor scenarios. In this paper, the signal processing module is described which is based on Software-Radio platfor