Teacher tensions: expectations in a professional development institute

The purpose of this study was to better understand teacher tensions in professional development. The population under study was practicing mathematics teachers engaged in a week-long professional development institute. Data sources included observations, interviews, and teacher products (such as registration forms, surveys, journals, and notebooks). The data were analyzed to determine what tensions were evident in the institute and how those tensions arose. In this paper, we examine participants’ tensions in a professional development situation when their expectations did not match reality. We have done so by presenting a theoretical model of professional development based on an instructional rhombus that illuminates the actual and applicatory aspects of teachers’ professional development experiences. The main tensions expressed by the teachers were related to the content and pedagogy of the institute. This study points toward the importance of teachers’ expectations in professional development.     

What Neural Substrates Trigger the Adept Scientific Pattern Discovery by Biologists?

This study investigated the neural correlates of experts and novices during biological object pattern detection using an fMRI approach in order to reveal the neural correlates of a biologist’s superior pattern discovery ability. Sixteen healthy male participants (8 biologists and 8 non-biologists) volunteered for the study. Participants were shown fifteen series of organism pictures and asked to detect patterns amid stimulus pictures. Primary findings showed significant activations in the right middle temporal gyrus and inferior parietal lobule amongst participants in the biologist (expert) group. Interestingly, the left superior temporal gyrus was activated in participants from the non-biologist (novice) group. These results suggested that superior pattern discovery ability could be related to a functional facilitation of the parieto-temporal network, which is particularly driven by the right middle temporal gyrus and inferior parietal lobule in addition to the recruitment of additional brain regions. Furthermore, the functional facilitation of the network might actually pertain to high coherent processing skills and visual working memory capacity. Hence, study results suggested that adept scientific thinking ability can be detected by neuronal substrates, which may be used as criteria for developing and evaluating a brain-based science curriculum and test instrument.     

The developmental history of labor education in South Korea from a sociopolitical and economic perspective

Although there is a considerable body of research regarding the relationships between the sociopolitical and economic transition and its implications for the education system in South Korea, there is little known about how sociopolitical and economic factors affect labor education practice in South Korea. The premise of the study is that the development of labor education is driven not only by workers’ needs but also by the state's policy to increase productivity while keeping the labor movement and political expression under control. Since many educators often overlook the importance of labor education by excluding it from adult education, very few studies have been conducted to identify the relationship between sociopolitical and economic factors and labor education in South Korea. The purpose of the study is thus to examine the effect of particular combinations of social, political, and economic forces on the development and expansion of labor education in South Korea during the period between the 1960s and the 1990s. The results of the study can be compared with studies of other countries that underwent a similar pattern of political and economic transformation.     

Development of an instrument for measuring cognitive conflict in secondary‐level science classes

Based on conceptual change theory, cognitive conflict is known as an important factor in conceptual change even though there are still questions about its positive and negative effects on science learning. However, there is no reliable method by which to assess the cognitive conflict students experience in their learning. The purpose of this research was to develop an instrument for measuring secondary students' cognitive conflict levels as they learned science. The results of this study indicate that our instrument is a valid and reliable tool for measuring cognitive conflict levels. Factor analysis supported the model that cognitive conflict consists of four constructs: recognition of an anomalous situation, interest, anxiety, and cognitive reappraisal of the conflict situation. Implications for instruction and possibilities for future research are discussed. © 2003 Wiley Periodicals, Inc. J Res Sci Teach 40: 585–603, 2003     

Displacement or complementarity? Assessing the relationship between social media and public library usage in the U.S., South Korea,and Singapore

The relevancy of public libraries is often called into question, with some saying that library services have been or will be displaced by, among other things, new media such as social media. This study tested this displacement hypothesis with survey data collected from three nations (the U.S.: N = 879; South Korea: N = 700; and Singapore: N = 987). Ordinal regressions were used to investigate the relationship between the use of social media and nine public library services, taking into account individual demographic differences. The results show that for all three nations, social media use has significant complementary relationships with all nine library services examined. Computer and information literacy training showed the largest effect size. However, signs of displacement effects were observed in the odds ratio statistics, particularly among daily social media users and in reference services, library visits, and time spent in the library, suggesting that where displacement is concerned, these areas warrant extra attention.     

Disentangling User Samples: A Supervised Machine Learning Approach to Proxy-population Mismatch in Twitter Research

ABSTRACT

This study addresses the issue of sampling biases in social media data-driven communication research. The authors demonstrate how supervised machine learning could reduce Twitter sampling bias induced from “proxy-population mismatch”. Particularly, this study used the Random Forest (RF) classifier to disentangle tweet samples representative of general publics’ activities from non-general—or institutional—activities. By applying RF classifier models to Twitter data sets relevant to four news events and a randomly pooled dataset, the study finds systematic differences between general user samples and institutional user samples in their messaging patterns. This article calls for disentangling Twitter user samples when ordinary user behaviors are the focus of research. It also builds on the development of machine learning modeling in the context of communication research.     

Delay-dependent exponential stability criteria for neutral systems with interval time-varying delays and nonlinear perturbations

This paper investigates the problem of global exponential stability for neutral systems with interval time varying delays and nonlinear perturbations. It is assumed that the state delay belongs to a given interval, which means that both the lower and upper bounds of the time-varying delay are available. The uncertainties under consideration are norm-bounded. Based on the Lyapunov–Krasovskii stability theory, delay-partitioning technique and lower bounds lemma, less conservative delay-dependent exponential stability criteria are derived in terms of linear matrix inequalities (LMIs) with fewer decision variables than the existing ones. Numerical examples are given to show the effectiveness of the proposed method.     

The bad guy is one of us: framing comparison between the US and Korean newspapers and blogs about the Virginia Tech shooting

This study examines cross-national and cross-media differences in framing, particularly regarding the salience of collectivistic storytelling, based on the US and Korean newspapers and blogs about the Virginia Tech campus shooting incident. Although collectivistic storytelling is a common practice of news domestication, the degree of its salience is affected by a nation's orientation toward collectivism. Cross-media level of difference also exists because journalistic perspectives and the public's interpretation of those perspectives, as reflected in newspapers and blogs, are different. Findings indicate that while there are some consistent framing patterns, the degree of collectivism was different between the two nations and between the two media.     

韩国文化产业立国战略研究

韩国的文化立国战略主要表现为文化产业立国.这一战略经由《内容韩国蓝图21》、《C韩国战略C-Korea2010》和《内容产业振兴基本计划》等历届韩国政府的重大决策而得以形成.韩国文化产业立国战略的主要内容是:强调文化产业的经济价值,注重文化产业法律制度以及政府扶持政策的制定,集中扶持重点的战略领域,将文化内容的海外市场开发作为核心目标,强调创作力度的品质,注重产业基础环境的营造及专门人才的培养.