W₁/O/W₂다중에멀젼의 점도특성 및 전해질 방출거동

金哲薰,林恩正 건국대학교 1995 대학원 학술논문집 Vol.42 No.-

W₁/0/W₂multiple emulsions were prepared hy the two-step manufacturing method. The emulsifiers used were the sorbitan sesquioleate as a hydrophobic emulsifier and polyokyethylene sorbitan monooleate as a hydrophilic emulsifier. Releasing behavior of emulsions, containing different electrolytes in inner and outer aqueous phase respetively, according to the osmotic pressure gradient were investigated by optical microscope, conductivity measurement and rheological measurement. By introducing xanthangum and micro nano TiO₂in inner and outer phase, we can find that the release behaviors depend on electrolyts. As a result, Xanthanegum affected the stability of products but it did not affect on the release rate. The effects of TiO₂were significant. The results of viscosity measurement were in accordance with those of conductivity measurement. All prepared products showed non-newtonian flow behavior in measuring of rheological properly, and the major releasing behaviors were appeared as follow in aging : rapid increase of viscosity by the phase inversion to W/O emulsion; rapid decrease of viscosity by the water movement from inner aqueous to outer aqueous Phase caused by destruction of W₁/0/W₂ multiple emulsion; decrease of viscosity d1aI1ge according to the stabiliW of W₁/0/W₂ multiple emulsion; slow decrease of viscosity by the gradual inversion from W/O to W₁/0/W² multiple emulsion.

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.

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

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

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.

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.

성장기 외상으로 인한 상악전치부 결손 환자 악교정수술 및 임플란트 수복 케이스

김철훈,김무성,장국원,김복주,황희성,전영미,김도희 대한통합치과학회 2018 대한통합치과학회지 Vol.7 No.2

Implant placement of the maxillary anterior teeth should consider all of the esthetics and functions. In patients with maxillary deficiency, maxillary anterior implants can not be placed in an aesthetic position, and the occlusal forces acting are disadvantageous. In this case, implant placement should be planned after improving the intercourse relationship by orthognathic surgery. Therefore, in order to obtain good results, orthodontist, prosthodontist, oral and maxillofacial surgeon interdisciplinary approach and co-operation is important. This case report describes a case of maxillary anterior implants that was accompanied by orthognathic surgery and block bone graft in a patient who had lost maxillary anterior teeth due to trauma. 상악전치부의 임플란트는 심미적 요소, 기능적 요소를 고려해야한다. 상악 저성장이 있는 환자인 경우, 상악 전치부 임플란트는 심미적으로 배치할 수 없고, 교합력은 임플란트에 불리하게 작용한다. 이 경우 악교정수술을 통하여 악간관계를 개선한 후에 임플란트를 식립 해야한다. 이때 좋은 결과를 얻기 위해서는 교정의, 보철의, 구강악안면외과의 간의 협력이 중요하다. 이 증례보고에서는 상악전치부의 외상으로 인한 상실 환자에서 악교정 수술과 골이식술을 동반한 상악전치부 임플란트를 성공적으로 치료하였기에 이에 대하여 보고하고자 한다.

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 고신대학교(의대) 고신대학교 의과대학 학술지 2006 고신대학교 의과대학 학술지 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 는 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 DDE and waist circumference was a器essed 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. 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 는 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 DDE and waist circumference was a器essed 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.

저에너지 (10 - 500eV) 불활성 기체에 의한 니켈 (001) 표면의 스퍼터링에 대한 분자 동력학 계산

김철훈,강헌 한국진공학회 1993 한국진공학회 학술발표회초록집 Vol.- No.-

기업탐방_부산 일 · 생활균형 우수사례

김철훈 부산여성가족개발원 2020 여성우리 Vol.- No.63