함정전투체계의 연동 정보 분석을 위한 정보저장 소프트웨어 표준화에 관한 연구

김철훈,정동한,김영산,이효조 한국컴퓨터정보학회 2024 韓國컴퓨터情報學會論文誌 Vol.29 No.2

정보저장 소프트웨어는 함정전투체계의 연동 분석을 위해 전투 관리체계의 전술 도메인 메시지를분석 컴퓨터로 전달하는 기능을 수행하며, 전투 관리체계와 분석 컴퓨터 간의 중간 매개체 역할을한다. 정보저장 소프트웨어는 전투 관리체계에서 사용하는 대부분의 메시지를 처리하기 때문에 소스코드의 양이 상대적으로 많고, 연동 장비 및 메시지의 변경 사항에 의해 수정 사항이 빈번하게 발생한다. 이에 따라 개발 과정에서 추가적인 공수가 소요되게 되고, 결국 개발 비용의 증가로 이어지게 된다. 본 논문에서는 재사용성을 향상하기 위하여 정보저장 소프트웨어 구조에 대한 표준화에 관한 연구를수행하였다. 휘처 모델을 통해 정보저장 소프트웨어의 구성 요소를 기능별로 나누어 수정 요소를 분리하고, 디자인 패턴을 적용하여 정보저장 소프트웨어의 구조를 개선하였다. 그로 인해 연동 장비와 메시지의변화에도 정보저장 소프트웨어의 수정 사항을 최소화할 수 있게 되어 개발 비용의 절감 효과가 기대된다. The IISS(Integrated Interface Storage System) software performs the function of transmitting tactical domain messages of Combat Management System for interface analysis of Naval Combat System. The source code is relatively large because the IISS software handles most messages. The modifications of source code of the IISS software occur frequently due to changes in interconnected equipment and messages. Therefore, additional effort and cost are required during the development process. In this paper, we studied standardization of the IISS software to improve reusability. Through the feature model, the components of the IISS software were divided by function and modification elements were separated. And the structure of the IISS software was improved by applying design patterns. As a result, it was possible to minimize modifications of the IISS software by changes in interconnected equipment and messages and a reduction in development costs could be expected.

심실 중격 결손증 수술 치험 182례에 대한 임상적 고찰

김철훈 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.5

We clinically evaluated 182 cases of the ventricular septal defect that we experienced at the Department of Thoracic and Cardiovascular Surgery, Maryknoll Hospital from March 1986 through June 1990. Of the 182 cases, 95 patients were male and 87 patients were female. Their age distribution ranged from 8 month to 37 years and their mean age was 8.1 years. The most common chief complaint was frequent upper respiratory infection. Among them, 46 patients had associated cardiac anomalies, which were subdivided as follow; 9 cases of patent foramen ovale, 8 cases of infundibular stenosis, 6 cases of pulmonary valvular stenosis, 4 cases of left superior vena cava, and etc. The most common preoperative abnormal EKG finding was left ventricular hypertrophy in 22 cases. Ninety-three patients[51.1%] underwent simple closure of the VSD and the rest[48.0%] underwent patch closure. In anatomical classification by Kirklin type I constituted 24.2%; type II, 74.8%, type III, 0.7%, and the mixed type of type I and II, 0.5%, The important postoperative EKG changes were noted in 38 cases[20.9%], 18 cases of which were incomplete right bundle branch block. Thirty-three patients[18.1%] developed minor and major complications, and five patients died, overall operative mortality being 2.7%.

Sputtering of Clean and K - Covered Ni Surfaces by Low Energy (< 500 eV) Noble Gas Ions

김철훈,강헌 한국진공학회 1992 한국진공학회 학술발표회초록집 Vol.- No.-

O/W 에멀젼의 입자크기 및 상거동에 미치는 다양한 전상유화법의 효과

김철훈,박재길,허정림,유영태,박태욱,이치규 ( Cheol Hun Kim,Jae Kiel Park,Jung Rim Haw,Young Tai Yoo,Tae Wook Park,Chi Giu Lee ) 한국공업화학회 1995 공업화학 Vol.6 No.4

유화제는 polyoxyethylene(20)sorbitan monostearate와 sorbitan sesquioleate를 혼합 사용하고, 오일상으로는 liquid paraffin을 원료로 사용하여 다양한 전상유화 법으로 O/W 에멀젼을 제조하였다. 전상유화공정중에 오일상에 첨가되는 적량의 물은 가용화 되거나 유화되어 W/O 에멀젼으로 된다. 이 W/O 에멀젼은 분산상의 부피변화나(catastrophic inversion) 유화제의 오일과 물에 대한 친화도변화(transitional inversion)에 의해 O/W 에멀젼으로 전환된다. Direct 유화방법을 채택한 2단계 전상유화법의 공정에서는 잠정적인 (W/O)/W 이중에멀젼이 형성되었다 : 최종에멀젼이 W/O→(W/O)/W→O/W의 전환 단계를 거쳐서 생성되었다. 이 전환에서는 catastrophic inversion이 일어났다. 1단계 및 3단계 전상유화법은 W/O에서 pseudomicroemulsion gel상을 거쳐서 미세하고 균일한 O/W에멀젼입자가 얻어졌다 : W/O→pseudomicroem ulsion gel상→O/W. 이 전환에서는 연속상의 일정농도(5∼17wt%) 내에서 transitional inversion이 일어남을 알 수 있었고, 3단계 전상유화법이 2단계 전상유화법보다 더 미세하고 균일한 입자를 갖는 높은 점도의 에멀젼을 생성하였다. 본 연구에서 가장 미세하고 안정한 에멀젼입자가 형성되는 혼합유화제의 HLB 영역은 10.0∼10.8이었으며, 아울러 이 영역에서 오일상에 첨가되어 가용화되는 물의 양 또한 가장 많게 나타났다. O/W emulsions were prepared with the various phase inversion emulsification methods. The emulsifiers used were the polyoxyethylene(20)sorbitan monostearate and sorbitan sesquioleate, and the oil used was a liquid paraffin(dispersed phase). A portion of aqueous phase added during the phase inversion emulsification process is solubilized or emulsified into the oil phase to form a W/O primary emulsion. This primary emulsion eventually inverts to form an O/W final emulsion either by changing the dispersed phase volume(a catastrophic inversion) or by changing the surfactant`s affinity for the oil and water phases(a transitional inversion). A short-lived double emulsions of (W/O)/W type were formed in the process of the two-step phase inversion which adopted the direct emulsification method : O/W final emulsion was formed as follows, i.e., W/O→(W/O)/W double emulsion→O/W emulsion. Catastropic inversion occured in the two-step phase inversion emulsification method. In one-step phase inversion emulsification and three-step phase inversion emulsification, fine and homogeneous O/W emulsions were formed as follows, i.e., W/O→pseudomicroemulsion gel phase→O/W. In this method the transitional inversion occurred within constant concentration(5-17wt. %) of contineous phase. The more fine, homogeneous and viscous emulsion was prepared with the three-step phase inversion emulsification method than that of emulsions prepared with the two-step phase inversion emulsification method. The finest and most stable droplets were formed in 10.0∼10.8 HLB region of mixed surfactants and this HLB region had maximum amount of solubilizing water.

정보사회에 있어서 사회과 교육의 방향

김철훈 한국교육학회 대구·경북지회 1999 교육학논총 Vol.19 No.2

The main purpose of this study is to clarify the directions of social studies education in information-age. Here, the following three questions will be asked. First, what are the socio-cultural qualities of information society? Second, are there any possibilities and limitations in the educational uses of tele-communication technology? Third, what are the directions of social studies education in information society? The results are as follows: (1) Coming future will be the information society/knowledge society as technical revolution proceeds and the global village will be diversified and opend with each other. The people will take part in the conduct of state affairs more directly. Information-concentration enables people to develop more rational decison-making. The synergy of tele-communication skills, new media and post-modern culture puts techno-culture in a higher position. But the information society will also show us negative aspects. Students should to have comprehensive perspectives to the complicated issues. (2) The change of educational environments in the information society consists of practical uses of tele-communication skills, computer, multimedia, virtual reality, and internet. These transform traditional education into on-line education, home-learning network, cyber-school, tele-library, etc.. But the limitations of educational uses of tele-communication technology are especially interpersonal and intrapersonal problems. It is by man that education is realized. (3) The main purpose of social studies for coming future society is to increase an ability for students to adapt to the newly emerged environments. Thus, the new directions of social studies will represent the interdisciplinary characteristic which helps when they confront with the social problems caused by the socio-structural changes. In order to solve these problems, the directions of social studies education in information society are followings. First, we need to help students to learn how to be qualified global citizen who understands and efficiently adjusts to the global community and information society. Second, social studies education has to lay stress on overcoming the dysfunctions of information society. Third, we need to take political-socialization education of information in order to defend democracy against the political perils of new media. Finally, social studies education should emphasize information ethics for human society. As a whole, for the proper adjustment to the information society, we have to successfully socialize the future generation as responsible and able citizens through the social studies education.

유견 영구치의 근단형성에 관한 실험적 연구

김철훈 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.1

The purpose of this study is to investigate the differences of root formation by using different three materials histopathologically. 11 beagle dogs about 6 months old and 11.2kg by mean weight were used for root canal filling, a total of 94 root canals from 54 mandibular premolars with immature roots. Pulp tissues were exprirpated and root canals were left open for 2 weeks before debridement,and filled with Ca(OH)2-CMCP paste for control group and Vitapex, A.R.S.(Apatite Root Sealer type Ⅱ) for experimental groups. The teeth were then observed for the healing of periapical tissues, types of apical closure and hard tissue formation at 30,90,180 days after the treatment histopathologically. The results were as follows: 1.In final evaluation, it revealed 70% as good, 20% as fair and 10% as poor in control group, 74% as good, 20% as fair and 6% as poor in Vitapex group, and 36% as good, 45% as fair and 19% as poor in A. R. S. group. 2.In the status of apical closure, 80% of the control group, 91% of the Vitapex group and 73% of the A. R. S. group were observed for complete and incomplete apical closure. 3.Of the 5 types of apical closure, closure at apcial foramen type was most common(mean 52%) in all groups. And extracanal closure types were more common in control group compaired with experimental groups. Root growth types were not observed. 4.In X-ray evaluations, proper canal filling cases were more evaluated as good and fair,and poor cases were not observed in experimental groups. In the treatment of immature permanent teeth with infected root canals, Vitapex produced better results than Ca(OH)2-CMCP paste. Cases evaluated as poor for A. R. S. were more common and so more longer period observation is needed.

5G 코어망 기술: 소프트웨어와 콘텐트 지향 관점

김철훈,이성원 한국통신학회 2014 정보와 통신 Vol.31 No.6

최근 발표된 5G PPP(Public-Private Partnership) 에서도 나타나듯이, 차세대 네트워크의 변화는 소프트웨어와 IT분야에서 발전된 기술이 Telco 사업자의 네트워크로 전이되는 현상을 보여주고 있다. 특히 망의 중립성에 대해서도 “추가적인 망 투자를 수행한 콘텐트 제공업자의 콘텐트를 차별적으로 지원하는 것은 정당하다”는 개념도 확산되면서, 콘텐트를 인식하고 차별화된 서비스를 네트워크에서 제공하는 것이 수익 증가의 수단으로 부각되고 있는 상황이다. 이에 본고에서는 5G 코어망 기술의 발전을 소프트웨어와 콘텐트 지향적인 관점에서 알아본다.

건강검진 수진자에서의 대사증후군 관련 생활습관

김철훈,유병철,이용환 KOSIN UNIVERSITY COLLEGE OF MEDICINE 2006 高神大學校 醫學部 論文集 Vol.21 No.1

Background: Metabolic syndrome is caused by interplay between genetic and many environmental factors. Some behaviors or lifestyle patterns including physical activity, cigarette smoking, and diet, particularly carbohydrate and fat intake are associated with the metabolic syndrome. The objective of this study was to identify the relationship between metabolic syndrome and some lifesyle behaviors. Methods: A total of 635 medical check-up examinees who were examined in Kosin University Gospel Hospital from December, 2004 to July, 2005 were enrolled in this study. The height, weight, waist circumference, and systolic and diastolic blood pressure of the subjects were examined and on concentrations of fasting blood glucose, total cholesterol, HDL cholesterol, LDL cholesterol, and triglyceride in peripheral venous blood were measured. The metabolic syndrome was defined as the presence of three or more of the following; waist circumference men ≥90 cm, women ≥80 cm, blood pressure ≥130/85 mmHg, fasting glucose ≥110 mg/dL, HDL cholesterol, men <40 mg/dL, women <50 mg/dL, and triglyceride ≥150 mg/dL. The blood pessure, fasting glucose, HDL cholesterol, triglyceride were evaluated by using the criteria of NECP ATP Ⅲ and waist circumference was assessed by using the criteria of WHO Asia-Western Pacific. Self-administered questionnare was conducted on smoking, alcohol drinking, educational level, exercise, and dietary practices. Results: The prevalence of the metabolic syndrome was 37.5%. High fat intake was significantly associated with an increased risk of having the metabolic syndrome. In women, low educational level and high carbohydrate intake were associated with an increased risk of having the metabolic syndrome. High fat intake was significantly associated with an increased risk of having the metabolic syndrome in body mass index ≥25/0 kg/m2 or 50-59 years group. Conclusion: Low educational level, high fat and high carbohydrate intake were significantly associated with an increased risk of having the metabolic syndrome.

체벌의 상황 맥락에 대한 일 고찰

김철훈 한국청소년정책연구원 1999 한국청소년연구 Vol.- No.30

라운드 로빈 기법을 적용한 과학수업이 초등학생의 과학적 의사소통능력, 과학 학습동기 및 학업성취도에 미치는 영향

김철훈,이형철 한국초등과학교육학회 2017 초등과학교육 Vol.36 No.4

This study aimed to investigate the effects of science classes applying round robin strategy on scientific communicative competence, science learning motivation and academic achievement of elementary students. The number of participants were 126, 4 classes of 6th grade in C elementary school in B city. The experimental group, 2 classes including 63 participants, had science classes applying round robin strategy. While the comparative group, 2 classes including 63 participants, took ordinary teacher-driven lessons using teacher’s guidebook. Pre and post tests were done before and after intervention to assess the changing in each group’s scientific communicative competence, science learning motivation, and academic achievement. The results of this study can be summarized as follows: The science class applying round robin strategy showed significant effect on improving scientific communicative competence and science learning motivation and academic achievement of elementary students.