• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.2
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• pp.99-104
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• 2015

This study analyzed the effects on displacement and stress as a result of improving the profile fastening method targeting rectangular-shaped and cube-shaped specimens. For the rectangular-shaped specimens, the improved fastening method reduced maximum displacement to 41.7% and maximum stress to 18.3% compared to the existing fastening method. For the cube-shaped specimens, maximum displacement and maximum stress results were found to be similar to those of the rectangular-shaped specimens. Thus, as a result of comparing the stress and displacement of the existing and improved fastening methods, it was found that the improved fastening method is superior to the existing fastening method in terms of load support.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.293-296
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• 2000

본 논문에서는 주제어 인식에 기반한 문서영상의 검색 및 색인 시스템에 적용하기 위한 단어 단위 분한 시스템을 제안한다. 제안 시스템은 영상 전처리, 문서 구조 분석을 통해 추출된 텍스트 영역을 입력으로 단어 단위 분할을 수행하는데, 텍스트 영역에 대해 텍스트 라인을 분할하고 분할된 텍스트 라인을 단어 단위로 분할하는 계층적 접근 방법을 사용한다. 텍스트라인 분할은 수평 방향 투영 프로파일을 적용하여 분할 지점을 구한다. 그리고 단어 분할은 연결요소들을 추출한 후 연결요소간의 gap 정보를 구하고, gap 군집화 기법을 사용하여 단어 단위 분한 지점을 구한다. 이때 단어 단위 분할의 성능을 저하시키는 특수기호에 대해서는 휴리스틱 정보를 이용하여 검출한다. 제안 시스템의 성능 평가는 50개의 텍스트 영역에 적용하여 99.83%의 정확도를 얻을 수 있었다.

• Communications of Mathematical Education
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• v.29 no.3
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• pp.331-352
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• 2015

There are lots of disabled mathematicians who overcame their disabilities and made great achievement to the world of mathematics. In this article, we introduce disabled mathematicians who overcome their disabilities and contributes to the development of mathematics: Nicholas Saunderson, Leonhard Euler, Lewis Carroll, Solomon Lefschetz, Louis Antoine, Gaston Maurice Julia, Lev Semenovich Pontryagin, Abraham Nemeth, John Nash, Bernard Morin, Anatoli G. Vitushkin, Lawrence W. Baggett, Norberto Salinas, Theodore John Kaczynski, Richard E. Borcherds, Dimitri Kanevsky, Hwang Yun-seong, Emmanuel Giroux, Kim In-kang, Zachary J. Battles, and Pratish Datta. As well, we classify mathematics education environments and the role education played in helping these mathematicians overcome their disabilities and other obstacles. Then, we discuss educational environmental changes in the 21st century for special mathematics education.

• Korean Medical Education Review
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• v.8 no.1
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• pp.1-11
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• 2006

의사는 인간의 생명을 구하는 권한이 있으니까 마치 생명을 죽이는 권한도 포함된 것 같은 생각에 그야말로 막강한 권한을 가진 것 같이 보인다. 오늘의 한국에서는 과거와 달리 의사의 사회적 위상에 많이 떨어져 있지만 아직도 미국이나 독일 같은 선진 사회에서 의사의 위상은 준신에 가깝게 높고 그의 말과 판단이라면 비록 건강에 관한 이슈뿐만 아니라 삶에 대한 지혜로도 존중되고 수용된다. 의사의 사회적 위상이 높아진 것은 의학이라는 특수한 학문과 이와 연결된 의술의 그동안의 엄청난 발달과 무관하지 않다. 역사적으로 보면 고대 희랍시대부터 의학은 인간의 질병을 고치고 생명을 건강하게 보존하는 특별한 지식 그리고 이 지식을 기반으로 응용되는 치료기법으로 기예 (techne)라는 존칭으로 불리었다. 즉, 건강의 회복이라는 실질적인 목적을 가진 지식과 테크닉을 합친 이른바 귀중한 실천 (praxis)이다. 의학에 대한 낙관적인 전망은 시대와 문화가 바뀌면서 또한 의학 자체가 좀 더 발달하면서 도전을 받는다. 20세기에 들어서서 인간의 생명을 위협하고 또 고통을 주는 질병의 종류와 양상이 변하고, 의 과학이 앞으로 인류의 병들을 퇴치시킬 수 있다는 기대에 차질이 생기게 되었다. 미국 같은 선진국에서는 일찍이 1960년도 말부터 의학교과목 개혁의 일환으로 인문학의 과목들을 같이 가르치기 시작했다. 대표적인 과목들이 윤리학, 철학, 역사, 문학 등이다. 인문학의 보강은 의학과 기술과 인간성의 연결을 위해 의사들이 쓸 수 있는 인지적 도구 (cognitive tools)를 갖추게 하는 목적에서이다. 인문학의 도입으로 의사들이 인간의 삶을 좀 더 깊게 이해하고 풍부한 인간성으로 지식과 기술을 환자에게 적용할 수 있기 위해 각자의 마음과 머리 속에 포용통합능력을 발달시키자는 데 있다. 즉 의사들의 의식과 자유로운 상상력이 확장되면서 새로운 정체성을 갖게 되는 것을 바라는 것이다. 선진국의 의학교육에서 이 같은 교육이 좋은 의사를 만든다는 신념을 굳혀가고 있다. 성과를 증명하는 연구결과가 없어 아직도 회의적인 반응도 있으나 이와 같은 교육이 윤리적 상황에 대한 예민도를 높이는 것은 확실하다. 연세대학교 의과대학은 기독교 이념이 기본 교육철학이다. 인간성을 강조하고 의사들이 자신의 인간성을 개발 강화하는 교육이 하나님의 사랑을 의사 지신의 인간성과 그의 인간애로 내재화 시킬 수 있다면 그리스도의 정신을 의학과 의술에 연결시키는 고귀한 목적을 이룰 수 있는 길이라고 생각한다.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.11
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• pp.56-64
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• 2007

We developed the first automatic design system targeting a promising hybrid CMOS-Nanoelectronics Architecture called CMOL. The CMOL architecture uses NOR gates to implement combinational logic. In this hybrid CMOS-nanoelectronics architecture, logical functions and the interconnections share the nanoelectronics hardware resource. Towards automating the CMOL physical design process, we developed a model for the CMOL architecture, formulated the placement and routing problems for the CMOL architecture subject to the unique CMOL specific constraints, and solved it by combining a placement algorithm with a gate assignment algorithm in a loop. We validated the proposed approach by implementing several industrial strength designs.

• International Journal of Highway Engineering
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• v.5 no.1 s.15
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• pp.35-45
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• 2003

This paper presents a theoretical approach for estimation of CBR-value of subbase course and subgrade using a portable pavement dynamic cone penetrometer(PDCP). The PDCP used in this paper was based on a design from South Africa and extensive studies by Kleyn(1982) and more recently by Liveneh and Ishai(1987) and Chua(1988). To date, California Bearing Ratio[CBR] value was studied mainly for application of pavement structural design. This study was initiated to develop a method of obtaining the in situ CBR-values of subbase and subgrade for the structural evaluation of pavements in the swift and inexpensive manner. PDCP tests were implemented at 20 different kinds of soil samples in the lab and test results were analysed by a theoretical approach introduced. The procedure presented provides acceptable and promising results.

• Korean Journal of Heritage: History & Science
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• v.49 no.4
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• pp.126-155
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• 2016

This article deals with some issues with respect to the Mahan pottery excavated from the tombs. Pedestal jars with cover, small round-bottom jars, cylindrical pottery etc. had appeared in the interaction with the northern region in the dimension of the southern Korean peninsula. Especially, these relics had an important role at the route connecting the midwest region, Chungcheong(忠淸) inland and Yeongnam(嶺南) region. By this stage, the iron culture was similar to each other in the southern Korean peninsula. In addition to the inland route, the coastal passage along the west coast seems to have been used. Such signs are found in cylindrical pottery and Pedestal jars with cover. It was probably a natural phenomenon that the most powerful forces of Mahan appeared at this crossroad of cultural exchange. The unique style of Mahan pottery such as double-rim pottery had been established since the third century. After the third century, Mahan pottery varied by region depending on the tomb style. The difference roughly matches with the variations of the tomb style. But at the region of Bungumyo(mounded tomb), specific pottery such double-rim pottery had been prevalent than in other regions. And a specific style had been used in a narrow range. The pottery spread to the neighboring regions in the course of interaction and were also used in ritual practices.

• Journal of Preventive Medicine and Public Health
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• v.33 no.3
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• pp.299-305
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• 2000

Objectives : To investigate the difference in the occurrence of lung cancer between foundry workers and non-foundry workers by comparing the number of workers diagnosed with lung cancer through health insurance data. Methods : The study population was comprised of 28,884 workers who had undergone at least one general or special medical examination between January 1995 and December 1997 at the occupational health center. All of the subjects had health insurance during this period. We combined the medical examination data with the health insurance data to compare the number of foundry workers diagnosed with lung cancer and the number of non-foundry workers diagnosed with lung cancer. Results : Seven workers were diagnosed with lung cancer among the 1,591 foundry workers, compared to twelve workers among the 27,293 non-foundry workers (odds ratio: 10.04, 95% confidence interval: 3.95-25.55). The seven foundry workers diagnosed with lung cancer were all exposed to dust, and six out these seven workers were engaged in finishing or shake-out processes. Conclusions : Although the information for this study was obtained from health insurance data, which has limitations such as accuracy and completeness, the number of foundry workers diagnosed with lung cancer was significantly higher than that of non-foundry workers. Therefore, a well-designed cohort study should be followed to confirm the higher lung cancer rates in foundry workers.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.3
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• pp.157-165
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• 2006

The change of external/internal factors of the cell rquires specific biological functions to maintain life. Such functions encourage particular genes to jnteract/regulate each other in multiple ways. Accordingly, we applied a linear decomposition model IFSA, which derives hidden variables, called the 'expression mode' that corresponds to the functions. To interpret gene interaction/regulation, we used a cross-correlation method given an expression mode. Linear decomposition models such as principal component analysis (PCA) and independent component analysis (ICA) were shown to be useful in analyzing high dimensional DNA microarray data, compared to clustering methods. These methods assume that gene expression is controlled by a linear combination of uncorrelated/indepdendent latent variables. However these methods have some difficulty in grouping similar patterns which are slightly time-delayed or asymmetric since only exactly matched Patterns are considered. In order to overcome this, we employ the (IFSA) method of [1] to locate phase- and shut-invariant features. Membership scoring functions play an important role to classify genes since linear decomposition models basically aim at data reduction not but at grouping data. We address a new function essential to the IFSA method. In this paper we stress that IFSA is useful in grouping functionally-related genes in the presence of time-shift and expression phase variance. Ultimately, we propose a new approach to investigate the multiple interaction information of genes.

• The Korean Journal of Air & Space Law and Policy
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• v.33 no.2
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• pp.61-114
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• 2018

Recently airspace became a hot issue considering today's international relations. However, there was no data that could be fully explained about a legal system of korean airspace, so I looked at law and practice about korean airspace together. The nation's aviation law sector is comletely separate from those related to civil and military aircraft, at least in legal terms. The Minister of Land, Infrastructure and Transport shall carry out his/her duties with various authority granted by the "Aviation Safety Act". The nation's aviation-related content is being regulated too much by the Ministry of Land, Infrastructure and Transport's notice or regulation, and there are many things that are not well known about which clauses of the upper law are associated with. The notice should be clearly described only in detail on delegated matters. As for the airspace system, the airspace system is too complex for the public to understand, and there seems to be a gap between law and practice. Therefore, I think it would be good to reestablish a simple and practical airspace system. Airspace and aviation related tasks in the military need to be clearly understood by distinguishing between those entrusted by the Minister of Land, Infrastructure and Transport and those inherent in the military. Regarding matters entrusted by the Minister of Land, Infrastructure and Transpor, it is necessary to work closely with the Minister of Land, Infrastructure and Transport when preparing related work guidelines, and to clarify who should prepare the guidelines. Regarding airspace control as a military operation, policies or guidelines that are faithful to military doctrine on airspace control are needed.