Microscopy Images as Interactive Tools in Cell Modeling and Cell Biology Education          下载免费PDF全文

Tania C. Ara��jo-Jorge  Tania S. Cardona  Cl��udia L. S. Mendes  Andrea Henriques-Pons  Rosane M. S. Meirelles  Cl��udia M. L. M. Coutinho  Luiz Edmundo V. Aguiar  Maria de Nazareth L. Meirelles  Solange L. de Castro  Helene S. Barbosa  Mauricio R. M. P. Luz 《CBE life sciences education》2004,3(2):99-110

The advent of genomics, proteomics, and microarray technology has brought much excitement to science, both in teaching and in learning. The public is eager to know about the processes of life. In the present context of the explosive growth of scientific information, a major challenge of modern cell biology is to popularize basic concepts of structures and functions of living cells, to introduce people to the scientific method, to stimulate inquiry, and to analyze and synthesize concepts and paradigms. In this essay we present our experience in mixing science and education in Brazil. For two decades we have developed activities for the science education of teachers and undergraduate students, using microscopy images generated by our work as cell biologists. We describe open-air outreach education activities, games, cell modeling, and other practical and innovative activities presented in public squares and favelas. Especially in developing countries, science education is important, since it may lead to an improvement in quality of life while advancing understanding of traditional scientific ideas. We show that teaching and research can be mutually beneficial rather than competing pursuits in advancing these goals.  相似文献   

Whatever Happened to the Sociology of Education in Teacher Education?     

Ivan Reid  Frank Parker 《Educational studies》1995,21(3):395-413

This paper reviews something of the circumstances and factors which have contributed to the development and present status of the sociology of education in teacher education in England, Wales and Northern Ireland. It reports a survey which presents, through practitioners’ eyes, the discipline's present condition and their view of its future. It contrasts the resulting picture of a demise of the discipline and the pessimism of its practitioners with the condition of the sociology of education outside teacher education. It considers some of the consequences of the decline in the discipline, brought about by a decade of dramatic changes in teacher education.  相似文献   

Practitioner Learning in the Intersections Between Science and Language     

Cabello  Valeria M.  Salinas Barrios  Ivan  Geelan  David 《Research in Science Education》2019,49(4):949-957

Research in Science Education -  相似文献   

GIFTED YOUTHS’ SCHOLASTIC AND OCCUPATIONAL ACHIEVEMENTS     

Ivan Koren 《High Ability Studies》1991,1(2):187-190

A longitudinal study between 1970 and 1988 of scholastic and occupational achievements of intellectually gifted youths from the Sisak‐Banija region (SR Croatia, Yugoslavia) had four stages: (1) identification (organized during the final classes of the primary school period), (2) first phase of follow up (monitored during the period of secondary school education), (3) second phase of follow up (monitored during the period of higher education), (4) third phase of follow up (monitored during the first few years of employment). Results until now show that the intellectual status of subjects has remained constantly high; all subjects completed secondary school education and 67 percent continued their studies; a high proportion of them were oriented to engineering and science; they attained much higher levels of school achievement than average; many of them were interested in scientific research and different activities in arts and sport; many of them published their works. However, the study has drawn attention to negative consequences of the absence of a social support system for gifted youth in our country.  相似文献   

Cross-language information retrieval models based on latent topic models trained with document-aligned comparable corpora     

Ivan Vulić  Wim De Smet  Marie-Francine Moens 《Information Retrieval》2013,16(3):331-368

In this paper, we study different applications of cross-language latent topic models trained on comparable corpora. The first focus lies on the task of cross-language information retrieval (CLIR). The Bilingual Latent Dirichlet allocation model (BiLDA) allows us to create an interlingual, language-independent representation of both queries and documents. We construct several BiLDA-based document models for CLIR, where no additional translation resources are used. The second focus lies on the methods for extracting translation candidates and semantically related words using only per-topic word distributions of the cross-language latent topic model. As the main contribution, we combine the two former steps, blending the evidences from the per-document topic distributions and the per-topic word distributions of the topic model with the knowledge from the extracted lexicon. We design and evaluate the novel evidence-rich statistical model for CLIR, and prove that such a model, which combines various (only internal) evidences, obtains the best scores for experiments performed on the standard test collections of the CLEF 2001–2003 campaigns. We confirm these findings in an alternative evaluation, where we automatically generate queries and perform the known-item search on a test subset of Wikipedia articles. The main importance of this work lies in the fact that we train translation resources from comparable document-aligned corpora and provide novel CLIR statistical models that exhaustively exploit as many cross-lingual clues as possible in the quest for better CLIR results, without use of any additional external resources such as parallel corpora or machine-readable dictionaries.  相似文献   

Using Technological Attributes to Study Online Media: The Case of User-Generated Content     

Ivan Dylko 《广播与电子媒介杂志》2013,57(4):501-521

This study offers empirical evidence of Mix-of-Attributes (MOA) approach's analytical benefits, and illustrates how the MOA approach can be utilized. The study begins by content analyzing the most popular Web sites containing political user-generated content (UGC) and documenting presence of search efficiency, customizability, manipulability, participation cost reduction, and community orientation technological attributes. A cluster analysis is then used to develop classification of political UGC Web sites based on their attribute scores. The conventional and the attribute-based classifications of UGC are shown to be different, providing evidence of the MOA approach's usefulness. Theory-building implications of the attributes, the attribute-based classification, and the MOA approach are discussed.  相似文献   

Community College Student Success: From Boardrooms to Classrooms,Edited by V.S.Morest     

Ivan L. Harrell  II 《Community College Journal of Research & Practice》2013,37(12):1203-1205

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Effect of biological maturation on maximal oxygen uptake and ventilatory thresholds in soccer players: An allometric approach     

Giovani Cunha  Thiago Lorenzi  Katiuce Sapata  Andre Luiz Lopes  Adroaldo Cezar Gaya 《Journal of sports sciences》2013,31(10):1029-1039

Abstract

In this study, we investigated the effect of biological maturation on maximal oxygen uptake ([Vdot]O_2max) and ventilatory thresholds (VT₁ and VT₂) in 110 young soccer players separated into pubescent and post-pubescent groups.. Maximal oxygen uptake and [Vdot]O₂ corresponding to VT₁ and VT₂ were expressed as absolute values, ratio standards, theoretical exponents, and experimentally observed exponents. Absolute [Vdot]O₂ (ml · min^?1) was different between groups for VT₁, VT₂, and [Vdot]O_2max. Ratio standards (ml · kg^?1 · min^?1) were not significantly different between groups for VT₁, VT₂, and [Vdot]O_2max. Theoretical exponents (ml · kg^?0.67 · min^?1 and ml · kg^?0.75 · min^?1) were not properly adjusted for the body mass effects on VT₁, VT₂, and [Vdot]O_2max. When the data were correctly adjusted using experimentally observed exponents, VT₁ (ml · kg^?0.94 · min^?1) and VT₂ (ml · kg^?0.95 · min^?1) were not different between groups. The experimentally observed exponent for [Vdot]O_2max (ml · kg^?0.90 · min^?1) was different between groups (P = 0.048); however, this difference could not be attributed to biological maturation. In conclusion, biological maturation had no effect on VT₁, VT₂ or [Vdot]O_2max when the effect of body mass was adjusted by experimentally observed exponents. Thus, when evaluating the physiological performance of young soccer players, allometric scaling needs to be taken into account instead of using theoretical approaches.  相似文献   

A spectral analysis of team dynamics and tactics in Brazilian football     

Felipe Arruda Moura  Luiz Eduardo Barreto Martins  Ricardo O. Anido  Paulo Régis C. Ruffino  Ricardo M. L. Barros  Sergio Augusto Cunha 《Journal of sports sciences》2013,31(14):1568-1577

Abstract

The purposes of this study were to characterise the total space covered and the distances between players within teams over ten Brazilian First Division Championship matches. Filmed recordings, combined with a tracking system, were used to obtain the trajectories of the players (n = 277), before and after half-time. The team surface area (the area of the convex hull formed by the positions of the players) and spread (the Frobenius norm of the distance-between-player matrix) were calculated as functions of time. A Fast Fourier Transform (FFT) was applied to each time series. The median frequency was then calculated. The results of the surface area time series median frequencies for the first half (0.63 ± 0.10 cycles · min^?1) were significantly greater (P < 0.01) than the second-half values (0.47 ± 0.14 cycles · min^?1). Similarly, the spread variable median frequencies for the first half (0.60 ± 0.14 cycles · min^?1) were significantly greater (P < 0.01) than the second-half values (0.46 ± 0.16 cycles · min^?1). The median frequencies allowed the characterisation of the time series oscillations that represent the speed at which players distribute and then compact their team formation during a match. This analysis can provide insights that allow coaches to better control the team organisation on the pitch.  相似文献   

Student incentives and preferential treatment in college admissions     

Ivan Pastine  Tuvana Pastine 《Economics of Education Review》2012

We consider a framework in which the optimal admissions policy of a purely academic-quality oriented college implements preferential treatment in favor of the student from the deprived socioeconomic background which maximizes the competition between candidates. We find that the exact form of the preferential treatment admissions policy matters for student incentives and hence for student-body diversity in equilibrium. Preferential treatment policy in college admissions often takes, or is perceived to take, an additive form where the score of the applicant from the deprived background is augmented by a fixed number of points. Such a preferential treatment policy fails to incentivize students from the deprived background. Despite the affirmative action, the level of preferential treatment that achieves academic excellence leaves student-body diversity unchanged compared with a background-blind admissions policy and leads to a higher intergroup score gap.  相似文献