Definition of historical models of gene function and their relation to students’ understanding of genetics     

Niklas Markus Gericke  Mariana Hagberg 《Science & Education》2007,16(7-8):849-881

Models are often used when teaching science. In this paper historical models and students’ ideas about genetics are compared. The historical development of the scientific idea of the gene and its function is described and categorized into five historical models of gene function. Differences and similarities between these historical models are made explicit. Internal and external consistency problems between the models are identified and discussed. From the consistency analysis seven epistemological features are identified. The features vary in such ways between the historical models that it is claimed that learning difficulties might be the consequence if these features are not explicitly addressed when teaching genetics. Students’ understanding of genetics, as described in science education literature, is then examined. The comparison shows extensive parallelism between students’ alternative understanding of genetics and the epistemological features, i.e., the claim is strengthened. It is also argued that, when teaching gene function, the outlined historical models could be useful in a combined nature of science and history of science approach. Our findings also raise the question what to teach in relation to preferred learning outcomes in genetics.  相似文献   

Not All Library Analytics are Created Equal: LibAnswers to the Rescue!     

Mariana Lapidus 《Medical reference services quarterly》2019,38(1):41-55

The reasons for implementing and the advantages of switching to the Reference Analytics system, a part of the Springshare LibAnswers platform, for collecting reference statistics at a three-campus university library are described. The benefits of using this web-based product are highlighted based on the comparison with the previously used analytical tools and the annual statistical data. Transitioning to Reference Analytics allowed librarians to take advantage of such features, as seamless access to reference transactions, easy customization, cross-tabulation, and data visualization, proving beneficial for overall library reference services.  相似文献   

Are teachers techno-optimists or techno-pessimists? A pilot comparative among teachers in Bolivia,Brazil, the Dominican Republic,Ecuador, Finland,Poland, Turkey,and Uruguay     

Tomczyk  Łukasz  Jáuregui  Vladimir Costas  de La Higuera Amato  Cibelle Albuquerque  Muñoz  Darwin  Arteaga  Magali  Oyelere  Solomon Sunday  Akyar  Özgür Yaşar  Porta  Mariana 《Education and Information Technologies》2021,26(3):2715-2741

The aim of the article is to highlight the key elements related to the implementation of new technologies in education from the perspective of the opinions and experiences of educators in the field in Bolivia, Brazil, the Dominican Republic, Ecuador, Finland, Poland, Turkey, and Uruguay. The text compares issues related to attitudes towards the use of new media in education, experiences with different forms of e-learning, and the level of restrictions on the use of smartphones in school. These variables are juxtaposed with the self-assessment of digital competence and how cyberspace is used. The survey was conducted using a standardised survey questionnaire translated into the relevant national languages in the first half of 2019, and involved a sample of 873 teachers representing eight countries. On the basis of the pilot studies it was noted that: 1) Teachers from LAC and EU like to use digital media - this is a constant trend independent of geographical location; 2) Teachers note that new technologies are not always better than analogue didactic aids; 3) Teachers from selected countries (the Dominican Republic, Brazil, Turkey, and Uruguay) have much greater techno-optimism in themselves than teachers from Bolivia, Poland, Finland and Turkey in terms of the impact of ICT on student motivation and engagement; 4) In all countries teachers prefer free online courses (the different forms of e-learning are used most often by those in the Dominican Republic, and the least often in Bolivia and Poland); 5) In each country teachers who highly value their own digital competences and have a positive attitude towards new media use ICT much more actively; 6) There is also a global trend in that the extensive use of cyberspace (typical e-services) appears in combination with the extensive use of various forms of e-learning; 7) Teachers from Ecuador are most likely to want to ban the use of smartphones in schools. The most liberal approach in this respect is taken by the Uruguayans; 8) The knowledge of the conditions related to restricting the use of smartphones goes beyond the analyses related to the style of use and attitude towards new media. This article is the result of pilot studies conducted within the framework of the SMART ECOSYSTEM FOR LEARNING AND INCLUSION project carried out in selected Latin American, Caribbean (LAC) and European (EU) countries.

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A patent portfolio assessment of a Brazilian research university: The case of Universidade Federal Fluminense     

Gabriel Marcuzzo do Canto Cavalheiro  Favio Akiyoshi Toda  Mariana Brandao 《The Journal of High Technology Management Research》2019,30(1):91-99

Intellectual Property Rights (IPRs) are widely acknowledged to be of central importance to research universities worldwide. This article assesses the patent portfolio of Universidade Federal Fluminense (UFF), which is located in State of Rio de Janeiro in Brazil and currently consists of the largest Brazilian research university in terms of the total number of enrolled undergraduate students. More specifically, this study provides robust empirical evidence pointing out that a major university in a developing country is strengthening its patent portfolio by increasing the number of patent applications. In addition, it was also possible to observe that UFF's patent portfolio is dominated by emerging technologies addressing human necessities, such as medical, hygiene, or veterinary products.  相似文献   

Massed and spaced training build up different components of long-term habituation in the crabChasmagnathus     

María Eugenia Pedreira  Arturo Romano  Daniel Tomsic  Mariana Lozada  Héctor Maldonado 《Learning & behavior》1998,26(1):34-45

The crabChasmagnathus granulatus reacts to a shadow passing overhead with an escape response that habituates after 30 trials and for 5 days at least. The effect of a wide range of different intertrial intervals (ITIs) (0, 9, 27, 45, 81, 135, and 171 sec) on theChasmagnathus long-term habituation (LTH) was evaluated at 24 h. Memory retention was estimated separately at two phases of a six-trial testing session: at first trial (the initial testing phase) and at the subsequent block of five trials (the retraining phase). A training of 30 trials with an ITI equal to or longer than 27 sec induced LTH at both testing phases, however, with a 0- or a 9-sec ITI, training wholly failed to build up LTH. When the number of trials was increased, a massed training (ITI=0 or 9 sec) induced LTH at retraining but not at initial testing. Thus, massed training produces LTH only at retraining, whereas spaced training (ITI ≥ 27 sec) produces LTH at both initial phase and retraining. An ITI shift from training to testing diminished or abolished retention at retraining regardless of the direction of the shift, thus suggesting that crabs acquire a memory of the trial-spacing at training. According to these results, it is postulated that LTH consists of two memory components: one produced by spaced training and expressed at both initial testing and retraining, and one yielded by massed training and expressed only at retraining. The possibility that the two components of LTH were differentially affected by cycloxemide and context shift is discussed.  相似文献   

Parent role questionnaire: Psychometric qualities     

Barbara A. Mowder  Virginia Smith Harvey  Mariana Pedro  Robert Rossen  Linda Moy 《Psychology in the schools》1993,30(3):205-211

The Parent Role Questionnaire (PRQ) is a recently developed instrument to study individual perceptions of the parent role. The PRQ was piloted, revised, and studied psychometrically. This study examines PRQ internal consistency, test-retest reliability, and validity. Results reveal that the instrument has relatively high internal consistency, moderate test-retest reliability, and high validity. The discussion includes implications for further research and study on parents, parenting, and the parent role.  相似文献   

Knowledge management and scientific knowledge generation     

Mariana?van der WaltEmail author 《知识管理研究与实践》2006,4(4):319-330

This paper focuses on the knowledge generation property of science, asking the question how the historical success of science in the field of knowledge generation can be articulated to make it relevant to all approaches used for scientific knowledge generation in a pluralist reality. It proposes that science can be described more appropriately as a capability rather than to describe it methodologically and also provides preliminary indications on how to go about describing science as a capability. The goal of the investigation is to add value to the third generation of knowledge management where knowledge generation becomes important, not only knowledge diffusion. It assumes that knowledge generation is of foundational importance in practical problem solving.  相似文献   

The improvement in walking speed induced by resistance training is associated with increased muscular strength but not skeletal muscle mass in older women     

Leandro Santos  Alex S. Ribeiro  Brad J. Schoenfeld  Matheus A. Nascimento  Crisieli M. Tomeleri  Mariana F. Souza 《European Journal of Sport Science》2017,17(4):488-494

Objective: The purpose of the present study was to analyze whether improvements in fast walking speed induced by resistance training (RT) are associated with changes in body composition, muscle quality, and muscular strength in older women. Methods: Twenty-three healthy older women (69.6?±?6.4 years, 64.95?±?12.9?kg, 1.55?±?0.07?m, 27.06?±?4.6?kg/m²) performed a RT program for 8 weeks consisting of 8 exercises for the whole body, 3 sets of 10–15 repetitions maximum, 3 times a week. Anthropometric, body composition (fat-free mass [FFM], skeletal muscle mass [SMM], legs lean soft tissue [LLST], fat mass), knee extension muscular strength (KE1RM), muscle quality index (MQI [KE1RM/LLST]), and 10-meter walking test (10-MWT) were performed before and after the intervention. Results: Significant (P?<?.05) changes were observed from pre- to post-training for FFM (+1.6%), MQI (+7.2%), SMM (+2.4%), LLST (+1.8%), KE1RM (+8.6%), fat mass (?1.4%), and time to perform 10-MWT (?3.7%). The percentage change in 10-MWT was significantly associated with percentage change in MQI (r?=??0.46, P?=?.04) and KE1RM (r?=??0.45, P?=?.04), however not associated percentage of changes in SMM (r?=?0.01, P?=?.97), LLST (r?=??0.22, P?=?.33), and body fat (r?=?0.10, P?=?.66). Conclusion: We conclude that the improvement in the 10-MWT after an 8-week RT program is associated with increases in lower limb muscular strength and muscle quality, but not with muscle mass or body fat changes in older women.  相似文献   

Edge of Autumn     

Mariana B. Davenport 《The Educational forum》2013,77(1)

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Defining and Operationalizing Appropriation for Science Learning     

Olivia Levrini  Paola Fantini  Giulia Tasquier  Barbara Pecori  Mariana Levin 《学习科学杂志》2015,24(1):93-136

The goal of this article is to contribute to understanding the interplay between students' disciplinary engagement and their identity construction. The term appropriation, borrowed from scholars in linguistics and education, was chosen to capture this broader sense of productive learning that sits at the nexus of disciplinary engagement and identity. Appropriation implies deep conceptual understanding, but it also involves a reflexive process of transforming scientific discourse in a way that is authentic and personal. The core aim of this article is to turn the term appropriation into a theoretical construct by means of an analytic process of defining, operationalizing, and testing the definition against student interview and classroom data. Five discourse markers for operationalizing appropriation were discovered through this process. Appropriation, in our study, implies students’ discourse is (A) an expression of a personal “signature“ idea, (B) grounded in the discipline, (C) thick, in that it involves a metacognitive and epistemological dimension, (D) non-incidental, in the sense of being consistently used throughout classroom activities, and (E) a carrier of social relationships, in that it positions the student within classroom. The study is grounded in an extended intervention on thermodynamics in an Italian secondary school class (grade 12).  相似文献