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효율적인 네트워크 자원 관리를 위한 호스트의 접속 유형 판별에 관한 연구
허민(Min Hur),김명섭(Myung-Sup Kim) 한국통신학회 2012 韓國通信學會論文誌 Vol.37 No.11B
최근 스마트 디바이스 사용이 대중화 되고 업무 환경 또한 PC중심에서 스마트 디바이스로 확대되어 가면서 무선 트래픽 양이 급격하게 증가 되고 있다. Enterprise 네트워크 에서 무선 IP 대역과 무선 트래픽 대역폭 관리는 중요한 사항이 되고 있다. 네트워크 설계 시 단말 호스트들의 네트워크 접속 유형 판별은 효율적인 네트워크 설계와 관리에 큰 이점이 된다. 또한 판별된 단말 호스트의 지속적인 관리를 통해 효과적인 네트워크 운용이 가능하고, 접속 유형의 변화를 통해 NAT 사용 호스트를 판별 할 수 있다. 본 논문에서는 Enterprise 네트워크의 인터넷 접속점에서 수집된 트래픽의 RTT(Round-Trip-Time) 값을 이용하여 단말 호스트의 접속 유형을 판별하는 방법론을 제안한다. 또한, 실제 학내 망을 대상으로 제안하는 방법의 타당성을 증명한다. As the use of smart devices has become popular, the number of smart devices connected to network has increased and the amount of traffic from them has grown rapidly. The management of mobile traffic and IP address for smart devices in an enterprise network is crucial problem for efficient operation of network. The information about connection type of a terminal host to the network will be very useful for stable and efficient management of an enterprise network. Also, this information might be used to identify NAT device. In this paper, we propose a methodology to identify the connection type of a terminal host using RTT (Round-Trip-Time) value extracted from captured packets. We prove the feasibility of our proposed method in a target campus network.
인도네시아 무슬림 유학생의 문화충격을 통한 한국의 문화적 특성 이해
허민(Hur Min),허창수(Hur Chang soo) 학습자중심교과교육학회 2017 학습자중심교과교육연구 Vol.17 No.7
이 논문은 크게 두 가지에 주안점을 두고 있다. 하나는 인도네시아 무슬림 학생들이 한국의 지역 대학에서 유학을 하면서 겪는 문화충격과 관련하여 어떠한 경험을 하는가이다. 또 다른 연구 목적은 문화 충격과 문화 적응을 통하여 한국의 문화적 특성을 어떻게 이해할 수 있는가이다. 연구 참여자는 한국의 대학원에서 학업중인 2명의 인도네시아 무슬림 유학생이며 3개월간, 즉 2016년 8월까지 3차례의 면담을 시도하였다. 각 면담 시간은 1시간 정도였고 영어로 진행되었다. 연구 방법은 근거이론식 열린 코딩(open coding)으로 면담내용을 분석하였다. 이 연구는 인도네시아 무슬림 학생들이 어떻게 문화 다양성이 적은 한국의 지방대학에서 문화 충격을 경험하면서 문화적 동화보다는 문화적 차이로 인한 문화적 갈등을 드러낸다. 이러한 결과는 인도네시아 무슬림 문화와 한국 문화 간의 문화적 갈등이 집단주의, 종교교육 부재, 타문화에 대한 무관심에서 비롯되는 것으로 보여 진다. This paper focuses on two main points. One is the experience of Indonesian Muslim students in relation to the cultural shock that they experience while studying at a local university in Korea. Another research purpose is how to understand the cultural characteristics of Korea through cultural shock and cultural adaptation. Participants were two Indonesian Muslim students studying at a Korean graduate school and interviews were conducted for three months, August 2016. Each interview was about 1 hour and was conducted in English. The research method was analyzed by open - coding based on the grounded theory. This study shows how Indonesian Muslim students experience the cultural contact and adaptation in the local university in Korea with less cultural diversity. That aspect reveals cultural conflict due to cultural differences rather than cultural assimilation. These findings suggest the cultural conflict between Indonesian Muslim culture and Korean culture results from collectivism, religious incomprehension and ethnocentrism.
인간체외수정시술시 다낭성난포종 난포액이 정자의 운동성에 미치는 영향
김연희,이상훈,허민,Kim, Yeon-Hee,Lee, Sang-Hoon,Hur, Min 대한생식의학회 2000 Clinical and Experimental Reproductive Medicine Vol.27 No.2
Objective: The purpose of this study was to evaluate the effect of polycystic ovarian follicular fluid on sperm motility in human in vitro fertilization (IVF). Methods: From May, 1998 to July, 1999, 55 patients who complained of infertility were involved in this study. We obtained ovarian follicular fluids from the patients by ultrasono-guided aspiration. Subjects were divided into two groups. 20 patients who had polycystic ovarian disease were belong to study group, and 25 patients who had normal ovarian follicular fluid were belong to control group. The follicular fluid dilution was done with Ham's fluid as 10%, 20%, 50%, 100%. The sperm motility was analyzed by CASA at 6hr and 12hr after incubation in follicular fluids. Results: The levels of average path velocity (VAP) in all concentration fluid didn't show significant difference between study and control group. The other parameters including curvilinear velocity (VCL), amplitude of lateral head displacement (ALH), and linerity (LIN) were didn't show any significant difference between both groups. Conclusion: PCOD fluid had seemed to have an adverse effect on the sperm biological function. But, this study showed that PCOD fluid had no different effect on sperm motility with normal follicular fluid.
원인불명의 불임환자에서 림파구 정맥주입에 의한 면역 치료의 효능에 관한 연구
정병준,이상훈,허민,Jung, Byeong-Jun,Lee, Sang-Hoon,Hur, Min 대한생식의학회 1997 Clinical and Experimental Reproductive Medicine Vol.24 No.3
The aim of present study was to determine the efficacy of immunotherapy with paternal lymphocytes for unexplained infertility. It has been apparent that reproductive success may be affected by the presence of abnormal autoantibodies. Unexplained infertility and repeated pregnancy wastage has been reported in the presence of abnormal autoantibodies. These data suffest that abnormal immune function may be an important pathologic entity contributing subfertility in patients with unexplained infertility. Therefore, immunotherapy may be a possible treatment modality for patients with unexplained infertility. Some investigators have reported that a proportion of infertile couples with repeatedly unsuccessful ET showed close histocompatibility similar to those of spontaneous recurrent abortion. Recently, it has been noted that immunotherapy with paternal lymphocytes achieves a high efficacy in preventing subsequent abortion in women with primary recurrent abortion of unknown cause, which was mediated by immune reaction including blocking antibody. To substantiate the hypothesis, we applied immunotherapy preceding Peritoneal Oocyte and Sperme transfer (POST) to 43 patients, 47 cycles of 82 patients, 89 cycles with at least three previous IUI failure from April, 1993 to February, 1995. There were no significant differences between treatment and control group in clinical response and hormonal response to controlled hyperstimulation. there was no significant difference between treatment and control group in pregnant rates per cycles (42.6% versus 28.6%), but a significantly lower abortion rate per pregnancy in treatment group, with 10.0% (2/20) compared with 50.03% (6/12) in control group. This study may suggest that immune therapy for patients with unexplained infertility with paternal lymphocytes might be beneficial.