• Title/Summary/Keyword: Role Change

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Apolipoprotein E Expression in Experimentally Induced Intracranial Aneurysms of Rats

  • Choi, Young-Moon;Yi, Jin-Seok;Lee, Hyung-Jin;Yang, Ji-Ho;Lee, Il-Woo
    • Journal of Korean Neurosurgical Society
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    • v.39 no.1
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    • pp.46-51
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    • 2006
  • Objective : An Intracranial aneurysm is an important acquired cerebrovascular disease that can cause a catastrophic subarachnoid hemorrhage. Atherosclerosis is one of possible mechanism, but its contribution to aneurysm formation is unclear. Human apolipoprotein E[apoE] is best known for its arterial protection from atherosclerosis. In this study we observe apoE expression in experimental cerebral aneurysms of rats to elucidate the role of apoE in the process of cerebral aneurysm formation. Methods : Twenty-four male 7-week-old Sprague-Dawley strain rats received a cerebral aneurysm induction procedure. One month[12] and three months[12] after the operation, the rats were killed, their cerebral arteries were dissected, and the regions of the bifurcation of the right anterior cerebral artery-olfactory artery [ACA-OA] bifurcations were examined histologically and immunohistochemically. Results : In the 1 month group [n=12], the ACA-OA bifurcation showed no aneurysmal change in 7 rats and early aneurysmal change in 5 rats. In the 3 months group (n=12), the bifurcation showed no aneurysmal change in 2 rats and an advanced aneurysm in 10 rats. ApoE expression were in 3 specimen in early aneurysmal change, but not in advanced aneurysms. Conclusion : ApoE expression in early aneurysmal wall suggests a possible role for apoE in early events leading to aneurysm formation. Further studios are necessary to elucidate the exact role of apoE in the pathophysiology of cerebral aneurysm.

Frege and Gödel in Knowledge Change Model ('지식변화모델' 에서 프레게와 괴델)

  • Park, Chang Kyun
    • Journal for History of Mathematics
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    • v.27 no.1
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    • pp.47-57
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    • 2014
  • This paper aims to evaluate works of Frege and G$\ddot{o}$del, who play the trigger role in development of logic, by Knowledge Change Model. It identifies where their positions are in the model respectively. For this purpose I suggest types of knowledge change and their criteria for the evaluation. Knowledge change are classified into five types according to the degree of its change: improvement, weak glorious revolution, glorious revolution, strong glorious revolution, and total revolution. Criteria to evaluate the change are its contents, influence, pervasive effects, and so forth. The Knowledge Change Model consists of the types and the criteria. I argue that in the model Frege belongs to the total revolution and G$\ddot{o}$del to the weak glorious revolution. If we accept that the revolution in logic initiated by Frege was completed by G$\ddot{o}$del, it is a natural conclusion.

The Effect of Preceptor Preparation Education on the Preceptor's Role Recognition, Role Conflict and Professional Self-Concept (프리셉터 교육이 프리셉터 역할인식과 역할갈등 및 전문직 자아개념에 미치는 효과)

  • Choi, Eun-Young;Kim, Jung-Sil
    • Journal of Korean Academy of Nursing Administration
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    • v.14 no.3
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    • pp.241-248
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    • 2008
  • Purpose: The purpose of this study was to examine the effects of preceptor preparation education on the preceptor's role recognition, role conflict and professional self-concept. Method: A Quasi-experimental design with non-equivalant control group was used. The subjects included 39 nurses, 19 in experimental group, and 20 in the control group. The program consisted of introduction of preceptor education program & curriculum, change of hospital management environment, the newest trend of nursing course, concept of preceptorship, steps of preceptorship, role of preceptor, attitude of preceptor, role of education, etiquette in nursing situation, policy of clinical education ability improvement, communication, conflict management, nursing ethics, contents concerned nursing professionalist, cardiopulmonary resuscitation, and medication. The data was collected from September 29 to November 17, 2007 using a structured questionnaire. Result: Preceptor's role recognition was increased significantly in the experimental group. However, role conflict and professional self-concept weren't significantly changed in the experimental group, compared to the control group. Conclusion: This study provides evidence for potential and beneficial effect of preceptor preparation education program on nurses.

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The factor of feminization in men's fashion according to Sex Role Stereotype - research about 20's$\sim$30's mens - (성역할정체감에 따른 남성패션의 여성화경향 요인 - 20$\sim$30대 남성을 중심으로 -)

  • Lee, Hyun-Ji;Park, Ok-Lyun
    • Korean Journal of Human Ecology
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    • v.14 no.6
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    • pp.1027-1035
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    • 2005
  • The purpose of this study was to investigate the factor of feminization in men's fashion according to Sex Role Stereotype of 20's$\sim$30's mens. The investigators surveyed 260 men who aged twenties and thirties in pusan. For data analysis, we used Chi-Square Test, Factor Analysis, Reliability Analysis, T-test and ANOVA along with SPSS 12.0 package. The results of this study were as followings: First, the result of sex role stereotype according to vital statistics was different with age, scholarship, job, and employer. Androginy type and Undiffer type highly showed most variable. That showed the change of Sex Role Stereotype. Second, the result of the factor of feminization in men's fashion according to Sex Role Stereotype was identified as 'pursuit of fashion,' 'pursuit of sense,' 'feminity,' 'secession of sex role.' Third, the result of the factor of feminization in men's fashion according to the vital statistics was different with scholarship, job, and employer. Forth, the factor of feminization in men's fashion according to sex role stereotype was different with 'pursuit of fashion,' 'pursuit of sense,' 'secession of sex role.' Especially, 'pursuit of fashion' and 'pursuit of sense' was importantly understood with the factor of feminization in men's fashion in Androginy type.

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Conceptual Change via Contrasting Everyday and Scientifically Idealized Contexts

  • Oh, Won-Kun;Kim, Jae-Woo
    • Journal of The Korean Association For Science Education
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    • v.21 no.5
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    • pp.822-840
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    • 2001
  • This article presents a theoretical model for conceptual change that relates cognitive conflict and the role of context. The model assumes that students derive alternative conceptions from everyday contexts while scientific concepts presume an idealized context, and hence, that the source of cognitive conflict results from the difference between the two contexts. Test results and analysis of the model are presented by applying it in a class studying the inertial motion of bodies. The subjects are 37 seventh grade boys.

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