Who Pays for Online Content? A Media Dependency Perspective Comparing Young and Older People     

Liu Yang  Louisa Ha  Fang Wang  Mohammad Abuljadail 《媒体管理杂志》2015,17(4):277-294

This study examines predictors of online content purchases through media dependency theory and comparing young and older people. It focuses on actual online content purchases instead of willingness-to-pay used in previous studies. The effects of two dimensions of media dependencies are compared: intensity and referent scopes. Social media dependency and mobile media dependency are examined specifically, in addition to general Internet dependency as new media dependency. Our results show young people make more actual purchases of online content than older people. Predictors of online content purchases include age group, online shopping habits, ownership of mobile applications and mobile devices, Internet referent dependency, and social media intensity dependency. New media referent dependency is more important than intensity dependency for predicting online content purchases.  相似文献   

基于专利演化模型的机构专利分析          下载免费PDF全文

Yunji Jang  Jangwon Gim  Jinpyo Lee  Do-Heon Jung  Hanmin Jung  张津 《情报工程》2015,1(5):018-024

近年来,科学技术发展日新月异,每天都会出现各种新型研究领域,众多研究成果被发表与公布。为此,来自各个国家的组织机构做了巨大的努力要为自己的机构带来外部与内部的变化。事实上,对于很多机构来说,研究的意义在于通过分析研究成果得到有意义的结论。因此,本文通过对具体机制下的专利标题（发明名称）进行分析从而提出一种演化模型。首先,我们根据关键词的特性对标题的关键词进行分类,然后定义专利的相互关系。我们建议演化模型的相互关系建立在时间轴基础上,并且可以适用于实际数据。通过应用于实际数据的模型可预测出未来专利的关键词。  相似文献   

From Development of Sport to Development through Sport: A Paradigm Shift for Sport Development in South Korea     

Jae-Pil Ha  Karam Lee 《国际体育史杂志》2015,32(10):1262-1278

During the past several decades, South Korea has gained tremendous international recognition by achieving an excellent performance in a variety of international sport competitions and hosting numerous mega-sporting events. Although success in elite sport (i.e. Development of Sport approach) has contributed to making South Korea one of the sport powerhouses in the world, South Korea has paid very little attention to the role that sport can play as a tool for social and personal development (i.e. Development through Sport approach). Similarly, scholars also paid little attention to the ‘development through sport’ approach in South Korea while predominantly focusing their attention in taking the ‘development of sport’ approach. In recent years, however, the South Korean government has begun to show interest in the ‘development through sport’ approach to become a truly advanced sporting nation. Thus, the purpose of this paper is to explore how South Korea's paradigm in sport has historically shifted from ‘development of sport’ to ‘development through sport’ in its socio-political context.  相似文献   

Extraterritorial Outlet of Korean Nationalism in the Far Eastern Championship Games, 1913–1934     

Karam Lee  Jung-Hee Ha 《国际体育史杂志》2015,32(3):455-465

The Far Eastern Championship Games (FECG), held between 1913 and 1934, were a precursor to the Asian Games and among the first international athletic competitions in the Asian region. The FECG were launched in Manila, the Philippines, and supported by the Young Mens' Christian Association. Three countries participated in the Games: the Philippines, Japan and China. It is noteworthy that Korea, one of most powerful sports entities in Asia now, also participated in the FECG, but as part of the Japanese team. Although Korea was a powerless Japanese colony during the era, this paper argues that Korea's participation in the FECG permitted the colonized country to express its nationalism and become the cornerstone of modern sports development in Korea.  相似文献   

Parents’ and teachers’ perceptions of standards-based and traditional report cards     

Gerry M. Swan  Thomas R. Guskey  Lee Ann Jung 《Educational Assessment, Evaluation and Accountability》2014,26(3):289-299

The purpose of this study was to determine parents’ and teachers’ perceptions of standards-based and traditional report cards. Participants included 115 parents/guardians of students from a single, midsize school district that had implemented a standards-based report card. During the first two marking periods, all parents/guardians received both a traditional report card in which teachers assigned a single overall grade for each subject and a standards-based report card that included marks for individual standards within subjects. After midyear, parents were asked to complete a survey that asked which form they preferred and the reasons for their preference. Three hundred and eighty three teachers from two nearby midsize school districts considering the adoption of the same standards-based report card completed a similar survey. Parents overwhelmingly preferred the standards-based form. The teachers considering the adoption of a standards based report card were positive overall, but significantly less than the parents who had received them.  相似文献   

Assessing Scientific Practices Using Machine-Learning Methods: How Closely Do They Match Clinical Interview Performance?     

Elizabeth P. Beggrow  Minsu Ha  Ross H. Nehm  Dennis Pearl  William J. Boone 《Journal of Science Education and Technology》2014,23(1):160-182

The landscape of science education is being transformed by the new Framework for Science Education (National Research Council, A framework for K-12 science education: practices, crosscutting concepts, and core ideas. The National Academies Press, Washington, DC, 2012), which emphasizes the centrality of scientific practices—such as explanation, argumentation, and communication—in science teaching, learning, and assessment. A major challenge facing the field of science education is developing assessment tools that are capable of validly and efficiently evaluating these practices. Our study examined the efficacy of a free, open-source machine-learning tool for evaluating the quality of students’ written explanations of the causes of evolutionary change relative to three other approaches: (1) human-scored written explanations, (2) a multiple-choice test, and (3) clinical oral interviews. A large sample of undergraduates (n = 104) exposed to varying amounts of evolution content completed all three assessments: a clinical oral interview, a written open-response assessment, and a multiple-choice test. Rasch analysis was used to compute linear person measures and linear item measures on a single logit scale. We found that the multiple-choice test displayed poor person and item fit (mean square outfit >1.3), while both oral interview measures and computer-generated written response measures exhibited acceptable fit (average mean square outfit for interview: person 0.97, item 0.97; computer: person 1.03, item 1.06). Multiple-choice test measures were more weakly associated with interview measures (r = 0.35) than the computer-scored explanation measures (r = 0.63). Overall, Rasch analysis indicated that computer-scored written explanation measures (1) have the strongest correspondence to oral interview measures; (2) are capable of capturing students’ normative scientific and naive ideas as accurately as human-scored explanations, and (3) more validly detect understanding than the multiple-choice assessment. These findings demonstrate the great potential of machine-learning tools for assessing key scientific practices highlighted in the new Framework for Science Education.  相似文献   

The politics of naming: critiquing “learner-centred” and “teacher as facilitator” in English language and humanities classrooms     

Phan Le Ha 《Asia-Pacific Journal of Teacher Education》2014,42(4):392-405

“Learner-centred” and “teacher as facilitator,” among the most influential concepts (re)shaping education over the past decades, are often represented as bringing democratic participation, equality, and empowerment to learners and helping transform and liberate societies. At the same time, these concepts are constructed in binary terms with “teacher-centred” and “teacher as authority” projecting the two ends as being mutually exclusive. Drawing on data collected through interviews and scholarly works from teachers teaching Humanities and Teaching English to Speakers of Other Languages (TESOL) in Asian and English-speaking Western universities, this article examines their positionings, mode, and form of critique/criticality of learner-centred education. It demonstrates in what ways equality as the starting point (Ranciere) is not embedded in how learner-centred education has largely been promoted in these contexts. As well, while Ranciere’s concepts of equality and dissensus may empower those seen as marginalised and disadvantaged, these concepts fail to acknowledge the multiplicities and dynamics of positions of those presupposed to be “powerful” and “privileged.”  相似文献   

The state of evidence for social and emotional learning: A contemporary meta-analysis of universal school-based SEL interventions     

Christina Cipriano  Michael J. Strambler  Lauren H. Naples  Cheyeon Ha  Megan Kirk  Miranda Wood  Kaveri Sehgal  Almut K. Zieher  Abigail Eveleigh  Michael McCarthy  Melissa Funaro  Annett Ponnock  Jason C. Chow  Joseph Durlak 《Child development》2023,94(5):1181-1204

This article provides a systematic review and meta-analysis of the current evidence for universal school-based (USB) social and emotional learning (SEL) interventions for students in kindergarten through 12th grade available from 2008 through 2020. The sample includes 424 studies from 53 countries, reflecting 252 discrete USB SEL interventions, involving 575,361 students. Results endorsed that, compared to control conditions, students who participate in USB SEL interventions experienced significantly improved skills, attitudes, behaviors, school climate and safety, peer relationships, school functioning, and academic achievement. Significant heterogeneity in USB SEL content, intervention features, context, and implementation quality moderated student experiences and outcomes. Strengths and limitations of this evidence and implications for future USB SEL research, policy, and practice are discussed.  相似文献   

Drop-to-drop liquid–liquid extraction of DNA in an electrowetting-on-dielectric digital microfluidics     

Shubhodeep Paul  Hyejin Moon 《Biomicrofluidics》2021,15(3)

Recent advancements in microfluidics and lab-on-a-chip technologies enabled miniaturization and automation of many downstream nucleic acid analysis steps such as PCR. However, DNA extraction/isolation protocol remains a stand-alone sample preparation step. For a quick sample-to-result solution, downstream protocols and sample preparation protocols need to be seamlessly integrated into a single lab-on-a-chip platform. As a step toward such integration, this paper introduces microfluidic DNA isolation using the liquid–liquid extraction (LLE) method in the drop-to-drop (DTD) format. The electrowetting-on-dielectric digital microfluidic platform is capable of handling a two-phase liquid system easily, which enables DTD LLE. In this study, the extraction of plasmid DNA (pDNA) from an aqueous sample to an ionic liquid is demonstrated. Prior to pDNA extraction study, the DTD LLE protocol was developed and optimized using organic dyes as solutes. The selective extraction of pDNA in the presence of proteins as interfering molecules is also demonstrated. This work implies that DTD LLE can substitute for magnetic beads steps in standard DNA isolation protocols.  相似文献   

Introduction     

Frank Banks  Bob Moon 《欧洲师范教育杂志》1997,20(1):5-6

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