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권대현,배장호,송필현,김현태,문기학 대한남성과학회 2010 The World Journal of Men's Health Vol.28 No.3
Purpose: In early 1980s, vasectomy was performed in more than 10 thousand men of reproductive age annually without cost as a South Korean government policy of birth control, but because the policy has been converted to encouraging childbirth since July 2004, vasovasostomy is now covered by national health insurance. We investigated the effect of national health insurance coverage of vasovasostomy. Materials and Methods: From August 1997 to June 2009, a total of 117 patients who underwent vasovasostomy were enrolled in this study. We divided the patients into two groups. The 63 patients undergoing the procedure before national health insurance coverage were included in group A, and the other 54 patients, who underwent the procedure after insurance coverage began, were classified into group B. The two groups were compared according to age, spouse's age, time since vasectomy, number of children at the time of vasectomy, occupation, educational attainment, religion, and the reason for vasovasostomy. Results: The average number of cases of vasovasostomy was almost 3 times higher after insurance coverage was introduced, at 2.3 cases per month. The average spouse's age was significantly higher in group B than group A (35.2±4.8 vs. 32.2±3.5, p=0.012). Time since vasectomy was shorter in group B than group A (5.7±4.7 years vs. 8.9±5.0 years, p=0.001). Number of children at the time of vasectomy showed no significant difference between group A and group B, at 1.7±0.7 and 1.6±0.8 respectively. Cross tabulation analysis of occupation, educational status, religion, and the reason for vasovasostomy showed no significant difference. The patency rate was significantly higher in group A than group B (87.3% vs. 90.7%, p=0.012), but there was no significant difference in pregnancy rate. Conclusions: A significant increase was seen in patency rate, but not in pregnancy rate, after insurance coverage. However, further follow up will show us that a rise in the patency rate promises positive effects on the rise of pregnancy rate. We suggest that insurance coverage for vasovasostomy has encouraged an increase in births.
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A Life-Cycle Model of Drama TV Series Using Google Trends Data
권대현,전덕빈,김효영 한국경영과학회 2021 한국경영과학회지 Vol.46 No.2
Increased time-shifted TV viewing practice undermines the role of traditional viewer ratings in gauging consumer interests in primetime TV drama. This paper introduces Google Trends data as a supplementary measure of popularity and proposes a lifecycle model for describing the pattern of search activity related to TV drama shows. The model is accomplished by developing three models that deal with the different phases (i.e., prerelease, on-season, and post-season period) that a TV drama series goes through. In our empirical analysis, we demonstrate that the proposed model provides an apt description of the diffusion pattern of consumer search activity related to a primetime TV drama series. We also show that the search volume that accumulated during the pre-season period has predictive power to expect the level of consumer interest in the upcoming season premiere. We also find that the release of the following seasons of a drama series accompanies the search for its previous seasons because of her reciprocal spillover effects. Our findings indicate the importance of monitoring the online search activity of consumers in the TV drama industry.
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인터넷 트래픽 모니터링을 통한 네트워크 관리 시스템 모델링과 시뮬레이션
권대현,임준홍 漢陽大學校 工學技術硏究所 2000 工學技術論文集 Vol.9 No.1
본 논문에서는 네트워크 관리 시스템(NMS)을 제안하고 구현하였다. NMS에서 네트워크 트래픽 장애를 MRTG을 사용해서 측정하였고 링크간 특성을 평가하였다. 또한 발생 가능한 네트워크 문제를 확인하였으며 네트워크 시뮬레이션을 수행하였다. 이러한 작업은 네트워크의 분석과 성능을 향상시키는데 사용될 수 있다. In this paper, Network Management System(NMS) is proposed and implemented. In the NMS, network traffic load is measured using MRTG and link-to-link characteristics are evaluated. Also, the possible causes of occurring network problems are identified and the network simulations are performed. This can be used to analyze and/or enhance the performances of the network.
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하악골에 전이된 소세포암 (small cell carcinoma) : 증례보고 A CASE REPORT
권대현,김종배 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.5
The small cell carcinoma has the most aggressive clinical course of any type of pulmonary tumor with median survival from diagnosis of only 2 to 4 months, and is a very rare in oral cancer. Because of the high malignant potency, small cell carcinoma has a greater tendency to be widely disseminated by the time of diagnosis and chemotherapy for the primary therapy is accepted generally. However, distant metastasis to mandible is very rare and only 5 cases had been reported according to the literature review We experienced a case of small cell carcinoma metastasized to mandible ramus and condyle. The patient was 67 year-old male with multiple lymph node metastasis and managed with chemotherapy, who was died of tumor 2 months after the initial diagnosis If we regarded the mandibular tumor as a primary carcinoma, there was a possibility to operate uncurable tumor. This case implies the necessity of thorough general evaluation of the patient before the malignant tumor surgery in maxillofacial area
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권대현,Seungwon Jung,Eun-Jung Lee,Jae Young Lee,Se Na Moon,이재욱,Nack Gyun Chung,Bin Cho,Hack Ki Kim 대한심장학회 2013 Korean Circulation Journal Vol.43 No.12
Background and Objectives: Survivors of pediatric hematopoietic stem cell transplantation (HSCT) are at risk for developing hypertension. The objectives of this study are to evaluate the prevalence and risk factors of early onset hypertension during the engraftment period after HSCT. Subjects and Methods: This is a retrospective study of 157 consecutive patients (mean age at HSCT: 9.1±5.1 years) who underwent HSCT for acute myeloid leukemia (n=47), acute lymphoblastic leukemia (n=43), severe aplastic anemia (n=41), and other reasons (n=26). Blood pressure data were collected at five time points: 0, 7, 14, 21, and 28 days after HSCT. Hypertension was defined as having systolic and/or diastolic blood pressure ≥95th percentile according to age, gender, and height. To analyze the risk factors related to hypertension,data, including patients’ demographic and transplant characteristics, were reviewed. Results: Hypertension developed in 59 patients (38%), among whom 12 (7.6%) required long term therapy. Thirty-two (54%) patients had systolic and diastolic, 8 (14%) had only systolic, and 19 (32%) had only diastolic hypertension. Younger age, acute graft-versus-host disease,sinusoidal obstruction syndrome, treatment with antifungal agent, and greater increase in serum creatinine (Cr) levels were associated with hypertension. Multivariate analysis showed that younger age at HSCT and greater increase in serum Cr level were independent risk factors for hypertension. Conclusion: Prevalence of hypertension during immediate post-HSCT period is high, especially in younger children. A greater increase in Cr after HSCT was significantly associated with hypertension. Further study is needed to elucidate long-term cardiovascular complications in pediatric HSCT survivors.
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교육으로 만나는 목회 : 사회속의 가족들과 함께하는 기독교 교육
권대현 장로회신학대학교 기독교교육연구원 2012 교육교회 Vol.413 No.-
구약시대부터 이미 사회적 약자에 대한 깊은 배려가 있었다. 그 대상은 고아와 과부, 나그네 등이었다. 신약시대에도 역시 사회적 약자에 대한 배려를 예수님은 잊지 않으셨다. 여성에 대한 관심이나 부모 공경에 관한 이야기들이 이를 보여주고 있다. 오늘 우리가 살아가는 삶의 현장에서도 끊임없이 도전 받고 있는 것은 기독교가 사회적 책임을 다하지 못하고 내부로만 향하고 있는데 그 문제가 있다 하겠다. 이는 사회적 약자들을 향한 돌봄, 사회적 책무의 부족은 아닐까? 교육에 있어서도 교육의 차원이 교회 내에서만 머물고 있으며, 수업 중에만 머물고 있는 것이 현실이다. 교육 장소가 교회 내부로부터 외부로 향하는 것이 필요할 것이다. 외부로 향할 때, 가장 먼저 고려할 대상은 사회적 약자들이다. 그 중에서도 노인과 여성에 관한 기관들을 소개한다. 그들을 찾아가서 섬기며 교육하는 장으로, 동시에 두 가지를 추구하는 내용을 살펴보기로 하자.
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