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Factorizations in Topological Categories
金映璟 숙명여자대학교 대학원원우회 1984 원우논총 Vol.2 No.-
Category Top과 Unif의 부분 category의 factorization 구조를 규명하고 이를 이용하여 Top의 reflective subcategory와 coreflective subcategory의 특성을 구하였다.
김영경 아시아지적장애인연맹 산하 아시아저널센터 2014 Asia-Pacific Journal of Intellectual Disabilities Vol.1 No.2
Securing and maintaining learner sa’ ttention is an important factor to be considered in any educational setting if instruction is to be efficient. This study explored the effectiveness of a teacher-delivered attentional cue/response system on the task initiation latency periods of high school students with hearing impairments as they were taught in general education classes. We employed a multiple probe design across three general education classrooms and replicated across 3 high school freshmen with hearing impairments. This studsy ’positive results are promising as we consider teacher-friendly ways to increase instructional efficiency and to enhance and enrich the general education experiences of learners with disabilities.
Predictive Factors for Radiation Pneumonitis in Lung Cancer Treated with Helical Tomotherapy
김영경,홍성언,공문규,최진현 대한암학회 2013 Cancer Research and Treatment Vol.45 No.4
Purpose Predictive factors for radiation pneumonitis (RP) after helical tomotherapy (HT) may differ from those after linac-based radiotherapy. In this study, we identified predictive factors for RP in patients with lung cancer treated with HT. Materials and Methods We retrospectively analyzed clinical, treatment-related and dosimetric factors from 31 patients with lung cancer treated with HT. RP was graded according to Common Terminology Criteria for Adverse Events version 4.0 and grade ≥2 RP was defined as a RP event. We used Kaplan-Meier methods to compute the actuarial incidence of RP. For univariate and multivariate analysis, the log-rank test and the Cox proportional regression hazard model were used. We generated receiver-operating characteristics (ROC) curves to define the cutoff values for significant parameters. Results The median follow-up duration was 6.6 months (range, 1.6 to 38.5 months). The 2-,4-, and 6-month actuarial RP event rates were 13.2%, 58.5%, and 67.0%,respectively. There was no grade 4 or more RP. Ipsilateral V5, V10, V15, and contralateral V5 were related with RP event on univariate analysis. By multivariate analysis, ipsilateral V10 was factor most strongly associated with RP event. On the ROC curve, the cutoff values of ipsilateral V5, V10, V15, and contralateral V5 were 67.5%, 58.5%, 50.0%, and 55.5%, respectively. Conclusion In our study, ipsilateral V5, V10, V15, and contralateral V5 were significant predictive factors for RP after HT.
Local application of NK1 receptor antagonists and pulpal blood flow in cat
김영경,추완식,이호정,안동국,유현미,김성교 대한치과보존학회 2004 Restorative Dentistry & Endodontics Vol.29 No.3
The purpose of this study was to investigate the influence of NK1 receptor antagonists on the pulpal blood flow (PBF) when applied iontophoretically through the dentinal cavity of the teeth in order to understand whether iontophoretically applied NK1 receptor antagonists can control the pulpal inflammation. Eleven cats were anesthetized with alpha-chloralose and urethane, and substance P (SP) was administered to the dental pulp through the catheterized lingual artery in doses that caused PBF change without the influence of systemic blood pressure. NK1 receptor antagonists were applied iontophoretically to the prepared dentinal cavity of ipsilateral canine teeth of the drug administration, and PBF was monitored. Data were analyzed statistically with paired t-test. PBF increase after iontophoretic application of the NK1 receptor antagonists followed by the intra-arterial administration of SP was significantly less than PBF increase after iontophoretic application of the 0.9% saline followed by the intra-arterial administration of SP as a control (p<0.05). Iontophoretic application of the NK1 receptor antagonists (0.2 ~3.4 mM) following the intra-arterial administration of SP resulted in less increase of PBF than the iontophoretic application of the 0.9% saline following the intra-arterial administration of SP as a control (p<0.05). Therefore, the results of the present study provide evidences that the iontophoretic application is an effective method to deliver drugs to the dental pulp, and that iontophoretically applied NK1 receptor antagonists block SP-induced vasodilation effectively. The above results show the possibility that the iontophoretical application of NK1 receptor antagonists can control the neurogenic inflammation in the dental pulp.