Editors’ Note     

Iris Tabak  Josh Radinsky 《学习科学杂志》2013,22(2):97-99

The notion that students come to science courses with misconceptions has become quite widely accepted by those who follow or participate in education research. DiSessa and his colleagues (diSessa, 1988, 1993; Smith, diSessa, &; Roschelle, 1993/1994) have challenged the theoretical and empirical validity of this perspective and offered an alternative account of cognitive structure in phenomenological primitives or p-prims. The purpose of this article is to further clarify and contrast the two accounts: in particular, to consider their utility and generativity as conceptual tools for teachers. How may each perspective influence instructional perceptions and intentions? The article recounts a discussion about forces and motion from a high-school physics class, analyzes how a teacher may perceive students' participation in that discussion from either perspective, and considers what, based on those perceptions, the teacher may see as tasks for instruction.  相似文献   

Online newspapers in the U.S.: Perceptions of markets,products, revenue,and competition     

Hsiang Iris Chyi  George Sylvie 《媒体管理杂志》2013,15(2):69-77

The market position of Public Service Media (PSM) and the programming and services provided have for years been the object of academic media research. Relatively little has however been written about the way the PSM corporations are managed. The article presents a number of reasons why media management researchers should add this area to their field of study. Not only are the managers of PSM corporations in great need of scholarly inspiration from outside. Even more important from an academic perspective is the fact that PSM provides management researchers with a sample of reasonably comparable cases of media companies and managers exposed to radical and very similar changes in their operational environment.  相似文献   

Co-authorship networks and research impact: A social capital perspective   总被引：1，自引：0，他引：1  

Eldon Y. Li  Chien Hsiang Liao  Hsiuju Rebecca Yen 《Research Policy》2013

The impact of research work is related to a scholar's reputation and future promotions. Greater research impact not only inspires scholars to continue their research, but also increases the possibility of a larger research budget from sponsors. Given the importance of research impact, this study proposes that utilizing social capital embedded in a social structure is an effective way to achieve more research impact. The contribution of this study is to define six indicators of social capital (degree centrality, closeness centrality, betweenness centrality, prolific co-author count, team exploration, and publishing tenure) and investigate how these indicators interact and affect citations for publications. A total of 137 Information Systems scholars from the Social Science Citation Index database were selected to test the hypothesized relationships. The results show that betweenness centrality plays the most important role in taking advantage of non-redundant resources in a co-authorship network, thereby significantly affecting citations for publications. In addition, we found that prolific co-author count, team exploration, and publishing tenure all have indirect effects on citation count. Specifically, co-authoring with prolific scholars helps researchers develop centralities and, in turn, generate higher numbers of citations. Researchers with longer publishing tenure tend to have higher degree centrality. When they collaborate more with different scholars, they achieve more closeness and betweenness centralities, but risk being distrusted by prolific scholars and losing chances to co-author with them. Finally, implications of findings and recommendations for future research are discussed.  相似文献   

Effects of radiant heat exposure on pacing pattern during a 15-km cycling time trial     

Koen Levels  Jos de Koning  Iris Broekhuijzen  Tamara Zwaan  Carl Foster  Hein Daanen 《Journal of sports sciences》2013,31(9):845-852

Abstract

The goal of this study was to investigate the effects of different durations of skin temperature manipulation on pacing patterns and performance during a 15-km cycling time trial. Nineteen well-trained men completed three 15-km cycling time trials in 18°C and 50% relative humidity with 4.5-km (short-heat), 9.0-km (long-heat) or without (control) radiant heat exposure applied by infrared heaters after 1.5 km in the time trial. During the time trials, power output, mean skin temperature, rectal temperature, heart rate and rating of perceived exertion were assessed. The radiant heat exposure resulted in higher mean skin temperature during the time trial for short-heat (35.0 ± 0.6°C) and long-heat (35.3 ± 0.5°C) than for control (32.5 ± 1.0°C; P < 0.001), whereas rectal temperature was similar (P = 0.55). The mean power output was less for short-heat (273 ± 8 W; P = 0.001) and long-heat (271 ± 9 W; P = 0.02) than for control (287 ± 7 W), but pacing patterns did not differ (P = 0.55). Heart rate was greatest in control (177 ± 9 beats · min^?1; P < 0.001), whereas the rating of perceived exertion remained similar. We concluded that a radiant heat exposure and associated higher skin temperature reduced overall performance, but did not modify pacing pattern during a 15-km cycling time trial, regardless of the duration of the exposure.  相似文献   

A learner‐centric view of mobile seamless learning     

Lung‐Hsiang Wong 《British journal of educational technology : journal of the Council for Educational Technology》2012,43(1):E19-E23

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DESIGNING A MULTI-DISCIPLINARY GERIATRICS HEALTH PROFESSIONAL MENTORING PROGRAM     

J. James Cotter  Constance L. Coogle  Iris A. Parham  Colleen Head  LaQuana Fulton  Kathleen Watson 《Educational gerontology》2013,39(2):107-117

This paper describes a Geriatric Health Professionals Mentoring Program designed to address recruitment and retention of health professionals in geriatrics and gerontology. The training provided information on the mentoring process, negotiating mentoring agreements, and coaching mentees. The evaluative framework described examines: (a) the effects of mentoring, (b) reactions of mentors and mentees, and (c) the effect of intervening variables. Trained mentors expressed satisfaction with the program and were comfortable about general mentoring but less confident about specific guidance for mentees. A cadre of mentors can be successfully trained to assist geriatric health professionals to better care for older Americans.  相似文献   

CREATIVITY IN ADULTHOOD AND OLD AGE: AN EXPLORATORY STUDY     

Patricia Kay Alpaugh  Iris A. Parham  Kenneth D. Cole  J. E. Birren 《Educational gerontology》2013,39(2):101-116

The purpose of this study was to explore the creative process and creative products across the adult life span. The subjects were 61 women, ages 20 to 83 years, who were comparable in intelligence, education, and interest in writing. They completed a creative writing project and took three standardized creativity tests and two intelligence subtests. Both quantitative and qualitative differences were found favoring young adults. Predictive but not construct validity was demonstrated for the creativity tests with this population of young and old adults. Both methodological constraints and the ecological validity of these measures of creativity are discussed.  相似文献   

Deviating glucose results in an international dual-center study. A root cause investigation     

Janne Cadamuro  Peter Bergsten  Katharina Mrwald  Anders Forslund  Marie Dahlbom  Jonas Bergquist  Iris Ciba  Susanne M. Brunner  Jeanne Jabbour  Daniel Weghuber 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(1)

During a dual-center study on obese and normal weight children and adolescents, focusing on glucose metabolism, we observed a marked difference in glucose results (N = 16,840) between the two sites, Salzburg, Austria and Uppsala, Sweden (P < 0.001). After excluding differences in patient characteristics between the two populations as cause of this finding, we investigated other preanalytic influences. Finally, only the tubes used for blood collection at the two sites were left to evaluate. While the Vacuette FC-Mix tube (Greiner Bio-One, Kremsmünster, Austria) was used in Uppsala, in Salzburg blood collections were performed with a lithium heparin tube (LH-Monovette, Sarstedt, Germany). To prove our hypothesis, we collected two blood samples in either of these tubes from 51 children (Salzburg N = 27, Uppsala N = 24) and compared the measured glucose results. Indeed, we found the suspected bias and calculated a correction formula, which significantly diminished the differences of glucose results between the two sites (P = 0.023). Our finding is in line with those of other studies and although this issue should be widely known, we feel that it is widely neglected, especially when comparing glucose concentrations across Europe, using large databases without any information on preanalytic sample handling.  相似文献   

Michaud,Montrond, Mazloum and the First History of the Crusades in Arabic     

Iris Shagrir  Nitzan Amitai-Preiss 《Al-Masaq: Islam & the Medieval Mediterranean》2012,24(3):309-312

This short notice provides a novel and preliminary analysis of the source for the first Arabic history of the crusades, and contributes to the understanding of the penetration of the crusades as a distinct phenomenon into the Islamic world. The Arabic history, Min Ta?rīkh al-?urūb al-muqaddasa fī l-mashriq al-mad?ūwa ?arb al-?alīb was published in Jerusalem in 1865 under the authorship of the (late) Melkite patriarch, Maximos III Mazloum (d. 1855). The book was a modified translation of the French Les Guerres saintes d’Outre-Mer, ou tableau des croisades, retracé d’après les chroniques contemporaines, published in 1840 by Maxime de Montrond, who was heavily inspired by Michaud's Histoire des croisades. Though created in a Christian Francophile milieu, it seems clear that the Arabic translation was intended not only for a Christian audience, but also for a Muslim readership, as evidenced by examples, provided here, of the modifications of the French original.  相似文献   

Pastime and Classtime: Dialogue or Dialectic?     

Josh Radinsky  Iris Tabak 《学习科学杂志》2016,25(1):1-3

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