Critical physics agency: further unraveling the intersections of subject matter knowledge, learning, and taking action     

Sreyashi Jhumki Basu  Angela Calabrese Barton 《Cultural Studies of Science Education》2009,4(2):387-392

In this rejoinder to Bryan Brown and John Reveles, we highlight the facts that (a) sociocultural theories of learning do not go far enough because they fail to address a number of issues and (b) we require concepts such as power and positionality to understand science learning.

Angela Calabrese BartonEmail:

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Effect of target change during the simple attack in fencing     

Marcos Gutiérrez-Dávila  Matteo Caletti  Raquel Antonio  Enrique Navarro 《Journal of sports sciences》2013,31(10):1100-1107

Abstract

The aim of this study was to test the effect that changing targets during a simple long lunge attack in fencing exerts on the temporal parameters of the reaction response, the execution speed, and the precision and the coordination of the movement pattern. Thirty fencers with more than 10 years of experience participated in this study. Two force platforms were used to record the horizontal components of the reaction forces and thereby to determine the beginning of the movement. A three-dimensional (3D) system recorded the spatial positions of the 9 markers situated on the fencer plus the epee, while a moving target was projected on a screen, enabling the control of the target change. The results indicated that when a target change is provoked the reaction time (RT), movement time (MT), and the time used in the acceleration phase of the centre of mass (CM) increases significantly with respect to the attack executed with a straight thrust. The speed and horizontal distance reached by the CM at the end of the acceleration phase (V_X(CM) and S_X(CM), respectively) significantly decreased, while the errors increased. However, the temporal sequence of the movement pattern did not appreciably change.  相似文献   

Conversation retrieval for microblogging sites     

Matteo Magnani  Danilo Montesi  Luca Rossi 《Information Retrieval》2012,15(3-4):354-372

In this article we introduce a novel search paradigm for microblogging sites resulting from the intersection of Information Retrieval and Social Network Analysis (SNA). This approach is based on a formal model of on-line conversations and a set of ranking measures including SNA centrality metrics, time-related conversational metrics and other specific features of current microblogging sites. The ranking approach has been compared to other methods and tested on two well known social network sites (Twitter and Friendfeed) showing that the inclusion of SNA metrics in the ranking function and the usage of a model of conversation can improve the results of search tasks.  相似文献   

Autobiography in science education: Greater objectivity through local knowledge     

Angela Calabrese Barton  Darkside 《Research in Science Education》2000,30(1):23-42

In our paper we argue that (1) autobiography ought to be considered both the telling of one's story and the using of that story with others to understand and use difference productively, and (2) autobiography (as telling and interacting) dismantles the universalistic tug of science and replaces it with a push for science as local knowledge. To accomplish this dual task, we share selective autobiographical accounts of lives (autobiography as telling), and then use these accounts to have a conversation about urban science education (autobiography as interacting). Following these autobiographical accounts we then discuss how our different stories apart and together provide a greater objective insight into what it means to come-to-know science. When talking about their lives, people lie sometimes, forget a lot, exaggerate, become confused, and get things wrong. Yet, they are revealing truths. These truths don't reveal the past “as it actually was,” aspiring to a standard of objectivity. They give us instead the truths of our experiences. (Personal Narratives Group (PNG), 1989, p. 261)  相似文献   

E-beam lithography for micro-∕nanofabrication     

Matteo Altissimo 《Biomicrofluidics》2010,4(2)

Electron beam lithography (EBL) is one of the tools of choice for writing micro- and nanostructures on a wide variety of materials. This is largely due to the fact that modern EBL machines are capable of writing nanometer-sized structures on areas up to mm². The aim of this contribution is to give technical and practical backgrounds in this extremely flexible nanofabrication technique.  相似文献   

Special Issue: Culture and science education in the 21st century Journal of research in science teaching     

Eileen R. Carlton Parsons  Angela Calabrese Barton 《科学教学研究杂志》2011,48(10):1233-1233

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Techniques and considerations for monitoring swimmers’ passive drag     

Raffaele Scurati  Giorgio Gatta  Giovanni Michielon  Matteo Cortesi 《Journal of sports sciences》2019,37(10):1168-1180

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Laying the foundation for the Galileo myth     

Valleriani  Matteo 《Metascience》2021,30(1):169-171

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Ethnic Differences in Associations Among Popularity,Likability, and Trajectories of Adolescents' Alcohol Use and Frequency          下载免费PDF全文

Sophia Choukas‐Bradley  Matteo Giletta  Enrique W. Neblett  Mitchell J. Prinstein 《Child development》2015,86(2):519-535

Two‐part latent growth models examined associations between two forms of peer status (popularity, likability) and adolescents' alcohol use trajectories throughout high school; ethnicity was examined as a moderator. Ninth‐grade low‐income adolescents (N = 364; M_age = 15.08; 52.5% Caucasian; 25.8% African American; 21.7% Latino) completed sociometric nominations of peer status and aggression at baseline, and reported their alcohol use every 6 months. After controlling for gender, aggression, ethnicity, and socioeconomic status, popularity—but not likability—prospectively predicted alcohol use trajectories. However, these effects were moderated by ethnicity, suggesting popularity as a risk factor for alcohol use probability and frequency among Caucasian and Latino, but not African American adolescents. Results suggest that developmental correlates of peer status should be considered within cultural context.  相似文献   

Intellectual autonomy and the future of the university     

Miroljub Radojkovic  Andrew Calabrese 《Educational technology research and development : ETR & D》1992,40(3):117-124

This essay was first drafted shortly before the civil war in Yugoslavia began, while Professor Radojkovic visited Purdue University on a Fulbright fellowship to study educational theory and method for teaching about the information age.  相似文献