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51.
This study examines US and South Korean journalists' use of sources and their perceptions of source credibility in covering the six-party talks on North Korea's nuclear ambitions. In particular, this study analyzes the relationship between journalists' perceptions of source credibility and the media's source use in terms of the aggregate and individual levels. Results of content analysis of US and South Korean newspapers are compared with data from a survey of US and South Korean journalists who covered the six-party nuclear talks. Government officials are dominant sources in media coverage of the talks because of their high level of accessibility and credibility. US and South Korean journalists assigned the greatest credibility to government officials of their own country. The two groups showed significant differences in their perceptions of credibility of South Korean officials, North Korean officials, Japanese officials, and Japanese experts. Moreover, this study finds that individual journalists' perceptions of source credibility were as strongly correlated with their individual use of sources as with the news media's aggregate use of sources. Implications of the findings are discussed in the context of media sociology, in particular gatekeeping. 相似文献
52.
Yukiko Sakai Kuniko Sato Naoko Suwabe Hiroko Gemba Atsutake Nozoe Jeong‐Wook Seo Hye Yang Kim 《Health information and libraries journal》2014,31(3):239-242
This is the 11th in a series of articles exploring international trends in health science librarianship. The previous article in this series looked at the Far East (Greater China, Hong Kong and Taiwan). The current issue surveys developments in Japan and Korea. The next issue will explore trends in South Asia (India, Pakistan, Bangladesh and Sri Lanka). Next year all four issues will be devoted to trends in four regions in Africa (Southern Africa, East Africa, West Africa and North Africa. JM 相似文献
53.
We report a refillable and valveless drug delivery device actuated by an external magnetic field for on-demand drug release to treat localized diseases. The device features a pear-shaped viscoelastic magnetic membrane inducing asymmetrical deflection and consecutive touchdown motion to the bottom of the dome-shaped drug reservoir in response to a magnetic field, thus achieving controlled discharge of the drug. Maximum drug release with 18 ± 1.5 μg per actuation was achieved under a 500 mT magnetic flux density, and various controlled drug doses were investigated with the combination of the number of accumulated actuations and the strength of the magnetic field. 相似文献
54.
The bubble-free and pulse-free fluid delivery is critical to reliable operation of microfluidic devices. In this study, we propose a new method for stable bubble-free and pulse-free fluid delivery in a microfluidic device. Gas bubbles are separated from liquid by using the density difference between liquid and gas in a closed cavity. The pulsatile flow caused by a peristaltic pump is stabilized via gas compressibility. To demonstrate the proposed method, a fluidic chamber which is composed of two needles for inlet and outlet, one needle for a pinch valve and a closed cavity is carefully designed. By manipulating the opening or closing of the pinch valve, fluids fill up the fluidic chamber or are delivered into a microfluidic device through the fluidic chamber in a bubble-free and pulse-free manner. The performance of the proposed method in bubble-free and pulse-free fluid delivery is quantitatively evaluated. The proposed method is then applied to monitor the temporal variations of fluidic flows of rat blood circulating within a complex fluidic network including a rat, a pinch valve, a reservoir, a peristaltic pump, and the microfluidic device. In addition, the deformability of red blood cells and platelet aggregation are quantitatively evaluated from the information on the temporal variations of blood flows in the microfluidic device. These experimental demonstrations confirm that the proposed method is a promising tool for stable, bubble-free, and pulse-free supply of fluids, including whole blood, into a microfluidic device. Furthermore, the proposed method will be used to quantify the biophysical properties of blood circulating within an extracorporeal bypass loop of animal models. 相似文献
55.
Flight dynamics of the screw kick in rugby 总被引：1，自引：1，他引：0
This paper describes the aerodynamic forces and the flight trajectory for the screw (spiral) kick in rugby. The screw kick
is defined as that which causes the ball to spin on its longitudinal axis. The aerodynamic forces acting on a rugby ball spinning
on its longitudinal axis were measured in a wind tunnel using a six-component strut type balance. It was found that the drag,
the lift and the pitching moment depend on the angle of attack, while the side force (Magnus force) depends on both the spin
rate and the angle of attack in the range where the wind speed lies between 15 and 30 m s-1 and the spin rate is between 1 and 10 revolutions per second. Moreover, the flight trajectory was obtained by integrating
the full nonlinear six degrees of freedom equations of motion on the basis of aerodynamic data. In a simulation, a ball spinning
on its longitudinal axis tended to hook toward or away from the touchline even if the velocity and angular velocity vectors
were parallel to the touchline. The direction of the hook depends on the direction of the angular velocity vector. The initial
direction of the hook depends on the relationship between the flight path angle and the pitch angle as well as the direction
of the angular velocity vector. 相似文献
56.
Deok-Hee Seo 《Asia Pacific Education Review》2009,10(3):409-422
South Korean society in the late 1990s was confronted with socio-economic setbacks and discursive turbulence concerning the
quality of education being provided. It was at such a particular historical juncture of South Korean society that I conducted
ethnographic research on homeschooling families. Based on field data collected from four homeschooling families, this article
examines how lower middle-class families at first manifested their education fever in an unprecedented adoption of homeschooling,
and then returned their children to school within the same socio-cultural context. Central to this article’s analysis is what
members of these middle-class families, especially children, experienced during the homeschooling period, and how parents
negotiated their rationale for homeschooling and returning their children to school within contesting discourses (e.g., deschooling
and neo-liberalism). As will be shown, despite experiencing difficulties in pursuing a self-fashioned education in a school-centered
society, the families benefited from homeschooling in terms of acquiring “neo-liberal” mentalities for survival without risking
their established socio-cultural status. As such, this article reconfirms the ambivalent characteristics of the alternative
education movement in South Korea and its inevitable connection with the middle-class habitus embedded in the South Korean socio-cultural context.
相似文献
| Deok-Hee SeoEmail: |
57.
The relations among students’ motivational beliefs, cognitive processes, and academic achievement were investigated. A 51-item
questionnaire together with a mathematics achievement test was administered to 459 fifth graders in Korean elementary school
mathematics classrooms. Results indicated that, in general, students’ cognitive processes related closely to competence beliefs,
task values, and achievement goals, and more importantly their success or failure in mathematics achievement was closely linked
to competence beliefs, performance-avoidance goals, and persistence strategies. Positive evidence of performance-approach
goals was observed in math learning relative to task goals. As expected, performance-avoidance goals turned out to be detrimental
to students’ math learning. These findings are generally congruent with the motivational theories and support the position
that students should be encouraged to adopt task goals and actively involve themselves in math class activities. However,
it also behooves us to recognize the potential benefits of performance-approach goals in different cultural contexts, such
as the Korean elementary school math classrooms. 相似文献
58.
Hyunjin Song 《Communication methods and measures》2018,12(1):1-24
The substantial increase in nested data such as egocentric network data pose unique challenges to researchers, including how to adequately model the mechanisms and processes in which hypothesized effects operates within the complex interdependencies among social actors. While there is a growing interest in identifying the causal mechanisms and their contingencies using such nested structured data, the direct application of principles of (moderated) mediation analysis within traditional multilevel modeling framework is ambiguous and controversial. In this article, I provide a tutorial illustrating an approach to assessing mediation hypotheses based on path-analytic framework popularized by Hayes (2013). Focusing on estimation and inference of indirect effects with regard to nested data structure, I provide examples of the analysis within the context of egocentric network data, and illustrate implementation using Mplus software. 相似文献
59.
The development and current status of special education in South Korea are described and contrasted to that of the United States. South Korean special education was initiated in the 1890s by U.S. missionaries. Later, Japanese influence was considerable, especially on its regular educational programs. Special programs are available for five classifications of disabilities. Its major national special education legislation contains numerous provisions similar to P.L. 94-142. However, various conditions may impede the further development of services, including a high teacher-pupil ratio, the reliance on self-contained programs, negative attitudes toward people with disabilities, and lack of advocacy groups. Further initiatives require considerable research and policy debate among South Koreans. 相似文献
60.
C.W. Shanklin H. Huang Kyung-Eun Lee C. Ok S. Seo S.A. Flores 《Journal of Food Science Education》2003,2(3):47-52
ABSTRACT: A Web-based interdisciplinary instructional resource was developed to provide information that will increase food science educators' knowledge of waste management in the food chain. The 4 modules are: legal implications for management of wastes/residues; identification, quantification, and characterization of wastes/residues; management of wastes/residues; and economic ramifications of wastes/residues. Instructional materials are available for faculty and GTAs for use in teaching the 4 modules. Food science educators can use this Web-based instructional tool as an educational resource in their undergraduate classes to enhance students' knowledge and ability to solve critical environmental problems in the food chain. See http://www.oznet.ksu.edu/swr/home/welcome.htm 相似文献