1,720,957 research outputs found
Propuesta metodológica para desarrollar el tema "manipulación de la herencia", del Programa Nacional de biología para décimo año
Get PDFValverde Soto, J. & Villegas Carrera, E. (2009). Propuesta metodológica para desarrollar el tema "manipulación de la herencia", del Programa Nacional de biología para décimo año. [Tesis de Licenciatura]. Universidad Nacional, Costa Rica.Este proyecto presenta una guía metodológica para el docente de Biología de
décimo nivel, para IV Ciclo de Educación Diversifcada del Ministerio de
Educación Pública en Costa Rica. Para llevar a cabo la misma, se analizó la
metodología empleada por parte de dos docentes de Biología de dos colegios
diurnos de la meseta central. La investigación responde a un estudio de tipo
naturalista-humanista, centrada en un enfoque cualitativo con una perspectiva
inicial exploratoria. La literatura muestra, que para lograr un aprendizaje
significativo es necesario que los docentes empleen una metodología basada
en los estilos de aprendizaje de los estudiantes, propiciando actividades de
mediación dinámicas, creativas y novedosas. En la recolección de información
se utilizaron técnicas como la entrevista (a los docentes) y el cuestionario
Honey-Alonso de estilos de aprendizaje aplicado a los estudiantes. La muestra
estudiada estuvo conformada por dos profesores y un total de treinta
estudiantes. Los principales resultados muestran que las estrategias
metodológicas más frecuentes son el cuestionario y las lecciones magistrales,
asimismo, los docentes manifiestan un nivel de conocimiento y capacitación
deficiente, con respecto a la Biotecnología; además el estilo de aprendizaje
predominante es el teórico. Las conclusiones indican que el desafío actual del
docente consiste en incorporar al aula los aspectos que abarca la
biotecnología, de una manera precisa, correcta y creativa, brindando a los
alumnos la posibilidad de desarrollar su capacidad de análisis para comprender
los alcances de la biotecnología y sus implicaciones. Finalmente, se
recomienda a los docentes el desarrollo de esta propuesta, seleccionando las
actividades de acuerdo con su disponibilidad de infraestructura, tiempo Y
recursos, teniendo en consideración el contexto educativo propio.This project presents a methodological guide for the tenth level Biology teacher, for the IV Cycle of Diversified Education of the Ministry of Public Education in Costa Rica. To carry it out, the methodology used by two biology teachers from two day schools in the central plateau was analyzed. The research responds to a naturalistic-humanistic study, focused on a qualitative approach with an initial exploratory perspective. The literature shows that, in order to achieve significant learning, it is necessary for teachers to use a methodology based on the learning styles of the students, promoting dynamic, creative and innovative mediation activities. In the collection of information, techniques such as the interview (to the teachers) and the Honey-Alonso questionnaire of learning styles applied to the students were used. The studied sample consisted of two professors and a total of thirty students. The main results show that the most frequent methodological strategies are the questionnaire and the lectures, likewise, teachers show a deficient level of knowledge and training, with respect to Biotechnology; In addition, the predominant learning style is theoretical. The conclusions indicate that the current challenge of the teacher is to incorporate into the classroom the aspects covered by biotechnology, in a precise, correct and creative way, giving students the opportunity to develop their analytical skills to understand the scope of biotechnology and its implications. Finally, teachers are recommended to develop this proposal, selecting the activities according to their availability of infrastructure, time and resources, taking into account their own educational context.Universidad Nacional, Costa RicaEscuela de Ciencias Biológica
Aislamiento de bacterias del suelo y su potencial utilización en sistemas de tratamiento de aguas residuales
No full textThe study of microorganisms from natural environments may be useful for developing a microbial consortium used for the bioaugmentation to a water treatment system. We studied microorganisms from soil samples taken in Tropical Biological Station and Aquaculture "Rio Macho", Cartago, Costa Rica and from these strains were selected most representative morphotypes. We performed four treatments in the wastewater by inoculating a suspension of each selected morphotype and the BOD (Biochemical Oxygen Demand) was quantified after these treatments. The morphotypes of the isolates were Gram negative bacilli (52,9%), Gram positive sporulated bacilli (29,4%), filamentous bacteria (11,8%) and Gram positive non-sporulated bacilli (5,9%). After the treatments there was a reduction from 94,7% to 95,85% on the initial BOD of wastewater, in contrast with the water that was not inoculated which yielded a decrease of 91%. This preliminary study demonstrates a good potential of these strains for use in systems of wastewater treatment as inocula for bioaugmentation.El estudio de microorganismos provenientes de ambientes naturales puede ser útil para la formulación de un compuesto microbiano aplicable para el bioaumento a un sistema de tratamiento de aguas. Se estudió microorganismos provenientes de muestras de suelo tomadas en Estación Biológica Tropical y Acuicultura “Río Macho”, Cartago, Costa Rica, y se seleccionaron cepas de los morfotipos más representativos. Se realizó cuatro tratamientos inoculando en el agua residual una suspensión de cada morfotipo seleccionado y posterior al tratamiento se cuantificó la DBO (demanda bioquímica de oxígeno). Los morfotipos de bacterias aisladas fueron bacilos Gram negativos (52,9%), bacilos Gram positivos esporulados (29,4%), bacterias filamentosas (11,8%) y bacilos Gram positivos no esporulados (5,9%). Tras los tratamientos se obtuvo una disminución entre un 94,7% hasta más de un 95,85% en la DBO inicial del agua residual, en contraste con el agua que no fue inoculada donde se obtuvo una disminución de un 91%. Este estudio preliminar evidencia un buen potencial de estas cepas para su utilización en sistemas de depuración de aguas residuales como inóculos para bioaumentación.
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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