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김현호 한국전략문제연구소 1996 전략연구 Vol.3 No.2
Since the 1990's, North Korean refugees have been under great international interest due to their growing number. Also the escape movement is seen as closely related to the overall crisis that North Korea is currently facing. Some even compare it to that of the East Germans shortly before the downfall of the Berlin Wall. The escape of North Koreans should be observed with Korean Government's reunification policy. It is clearly not the simple matter of human rights. About 1,500 North Korean refugees are wandering in China and Russia. The Korean goverment sees that about 700 of them wish to move to South Korea. However, the exact number is unknown. The size has been suddenly increased during 1990~1993. The North Korean government has strengthened the boarder line watch since. The number has been decreased because the refugees were unsure about their safety. Currently, the annual number of refugees is not over some hundreds. The refugees are not active in anti-North Korean movement since it is impossible for them to act out in the open. The reform of Russia and China was in its height in the late 80's and early 90's. Naturally, it worked as an incentive to the massive escape. At the same time, as Korea expanded its diplomatical realtionship with China as well as Russia, Many North Koreans became aware of the South and they began to consider Korea as a place of refuge. North Korean economy has suffered a great deal in the 90's. Ecomomic difficulty is the main fundamantal factor of the refuge. The growing number of refugees especially in the 3rd countries has begun to act as a great burden in North Korean foreign policies. Therefore, the government become coersive which resulted in the increase of the refugees. North Korea may turn to economical reform. However, with the current size of refugees, it is yet hardly a threat to the regime. The size as well as the character of North Korean escapees are quite different from that of East German. From 1949 to the early half of the 90's about 5.2 million East Germans moved to the West. It was not difficult for East Germans to move out Some even moved out legally. The present North Korean refugees are risking their lives to cross the border. Korean Government's policy toward the refugees has always been impromtu. Or it has been just a talk without any principle. There has been a total of 80 submissions to the South since 1993 which takes up 10% of the overall number. Now is clearly the time for the government to come up with fundamental and comprehensive measures.
가시적 격자점 문제를 이용한 안드로이드 잠금 패턴 가짓수의 상계와 하계 범위 개선
김현호,정성재,송상헌 한국과학영재교육학회 2019 과학영재교육 Vol.11 No.3
In larger than grid, the number of Android locking pattern to solve using full search is hard. In this study, the Visible Grid point Problem is applied to obtain a possible number of patterns. This problem will be expanded. In original, Visible Grid Point Problem have been studied with infinite grid, while in this study, it extends to finite grid. With reference to the process of solving ratio of visible points of arbitrary point in infinite grid, , we solved the ratio of visible points to arbitrary point in the finite plane. However, it is difficult to obtain the accurate ratio of visible points to arbitrary point in the finite plane. Thus, by calculating the upper bound and lower bound of this ratio, we obtained the upper bound and lower bound of the numbers of the Android locking patterns’ possible parameters to see the approximate range of the possible parameters. So, all of upper bounds are improved. 격자 평면 위 임의의 점에서 다른 점을 볼 수 있는 비율은 이라는 가시적 격자점 문제는 무한 격자 평면에 기반을 둔 것이다. 하지만 이상 의 유한 격자 평면에서는 경우의 수(전체탐색법)만으로 그 가짓수를 모두 구하는 것은 어렵다. 본 연구는 선행연구들을 바탕으로 유한 격자 평면으로 국한할 때의 안드로이드 잠금 패턴의 가짓수 범위(상계와 하계)를 구하는 알고리즘을 개발하였다. 특히 좌표평면 위 점의 위치에 따른 가시적 격자점 비율의 상계와 하계를 미지수화하여 경우의 수에 따라 세분화하면서 공식화하였다. 이 공식을 바탕으로 Python Coding으로는 오버플로가 발생하지 않는 범위(13×13 격자판) 내에서 일부의 하계 값과 대부분의 상계 값을 개선시켰다. 이 연구는 Lee(2017)가 제시하였던 가시성에 기반하지 않은 연구에서의 알고리즘을 발전시켰고 최승훈 (2017)이 제안한 가시성에 기반한 연구와 Goodrich, et, al. (2018)과는 Visible Grid Point Problem에 공통점이 있다. 그러나 이들의 연구 결과값을 일부 개선했던 정성재, 김현호, 송상헌(2018)과도 상계와 하계를 구하려는 목적은 같으나 이를 구하는 과정과 방법에 차이가 있다.
김현호,박기혁,김욱,이현우,백종혁,조성현,강성규 대한인간공학회 2008 대한인간공학회 학술대회논문집 Vol.2008 No.10
근골격계질환 재해 특성에 관한 선행 연구들은 주로 특정 업종이나 지역에 국한시켜 진행되어 근골격계질환 전체 재해에 대한 특성을 파악하는데 한계가 있었다. 본 연구는 산업재해중‘비사고성·작업관련성 요통’및‘신체에 과도한 부담을 주는 작업’을 대상으로 2007년도 근골격계질환 재해 특성을 분석하였다. 연구는 산업재해보상담당기관에서 작성한 산업재해조사표를 토대로 일반적 특성(연령, 성별, 근속기간, 규모 등) 분석 및 반복작업, 중량물취급, 부자연스런 자세 등의 재해요인별 분석, 업무상 질병에 따른 각 변수별 동질성, 독립성 검정, 그리고 평균 근로손실일수에 대한 각 변수의 특성을 파악하기 위하여 일반선형모형을 이용한 분석 등을 실시하였다. 본 연구결과는 향후 근골격계질환 예방을 위한 기초 자료로 활용될 것으로 기대된다.
심부정맥혈전증으로 인한 소양인(少陽人) 하지부종(下肢浮腫) 치험 1례
김현호,홍솔이,임은철,김태환,Kim, Hyun-Ho,Hong, Sor-I,Lim, Eun-Chul,Kim, Tae-Hwan 사상체질의학회 2006 사상체질의학회지 Vol.18 No.3
1. Objectives The purpose of this study is to evaluate the effects of Sasang Constitutional medical diagnosis and treatment on Soyangin Edema caused by Deep Vein Thrombosis. 2. Methods The Subject is a 75 years old woman who has a left lower limb edema caused by Deep Vein Thrombosis, we had diagnosed her as Soyangin and prescribed Sasang Constitutional Medicine. We evaluated with length of patient's calf, thigh, ankle circumference and pitting edema, skin flare after medication. 3. Results Lower limb edma of a Soyangin patient responded well to the treatment with Dojeokganggi-tang(導赤降氣湯). 4. Conclusions This case study shows an efficient result by using Dojeokganggi-tang in treatment of Soyangin edema patient.
Establishing Optimal Service Cutoff Times for an Order Fulfillment System
김현호,강원석 이화여자대학교 경영연구소 2023 신산업경영저널 Vol.41 No.2
We develop a steady state sojourn time distribution for orders arriving at an order fulfillment system, given information about the order stream and processing times for workstations. Our work focuses on calculating the sojourn time distribution of an open queuing network with feedback requiring the re-processing of defective orders. With the sojourn time distribution in hand, we can easily calculate the time at which the marginal revenue for an order equals the marginal cost, which then establishes the cutoff time having the highest profit for the firm. We show how an order fulfillment firm might use such an approximation to establish a profit-maximizing cutoff time for promised, premium shipping.