서로 다른 CNC 환경을 갖는 공작기계의 인터넷 기반 점검

김동훈,김선호,김경돈,김찬봉,고광식 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

This paper proposes Internet-based checking scheme for machine-tools with a variant CNC. Checking points defined in this research are classified into two categories such as structured point and operational point. The formal includes the vibration of bearing, temperature of spindle unit and another periodical management. And the latter includes oil checking, clamp locking/unlocking and machining on/off status. Through this research, for the global management of variant CNC machines interspersed with CAC and OAC in manufacturing system, the suitable environment for Internet-based checking of variant CNC machines was designed and the checking methods for CAC and OAC machines were compared with each other.

실리카흄을 흔입한 고강도 콘크리트 개발

홍창우,김태경,김경진,김성환,김남윤,심도식,이정호,윤청호,백민경,원치문,박제선,이주형,정경일 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-

콘크리트 구조물이 대형화됨에 따라 설계단면이 증대되어 상대적으로 많은 경제적 손실을 부담하게 된다. 따라서 단면을 감소시키면서도 소요의 하중에 안전한 구조물을 건설하기 위해서는 우선적으로 구조물 건설에 기초가 되는 고품질, 고내구성의 고강도 콘크리트 개발이 절실히 요구된다 본 연구에서는 일정 시멘트비 및 혼화재 비율하에서 소요의 워커빌리티가 확보되는 고강도 콘크리트를 시간과 온도의 변화에 따라 증기 양생하여, 압축, 인장, 휨강도 뿐만 아니라 파괴특성을 실험적으로 연구하였다. 시료 제작시 시멘트 입자 사이의 공극 및 불연속 영역을 충전하여 고밀도화하기 위한 콘크리트용 혼화재로 시멘트 비표면적이 상당히 작은 초미립 분말인 실리카흄을 이용하였다. 또한 AE감수제 및 고성능 유동화제를 사용하여 혼화재의 첨가에 의하여 발생될 수 있는 워커빌리티의 감소를 방지하였다. 실험결과에 의하면 일정 양생 지속 시간하에서 온도의 증가에 따라 콘크리트의 압축, 인장 및 휨강도가 전반적으로 증가하였다. 동일하게 일정 온도하에서 양생 지속시간이 커짐에 따라 강도들이 증가됨을 알 수 있었다. 따라서 상대적으로 높은 온도와 긴 지속 양생 조건하에서 파괴에 대한 저항력이 크게 나타났다. The compressible, tensible, and flexibleresistance of the high strength concrete is analyzed by the experimentation in the present study. For the test, we cure several samples with the silica fume as a mixture being become dense the spaces between the particle of cement under the variation of both the temperature and the curing-interval. Then, the superplasticizer and the ezcon are also used to satisfy the required workability for construction. The compressible, tensible, and flexible resistances to a stress are increased as increasing the temperature and the time interval for the curing. Therefore it is concluded that the overal fractural and mechanical properties is improved by mixing the silica fume into the cement.

딤플을 적용한 평판에 대한 항력 감소 연구

백부근(Bu-Geun Paik),편영식(Young-Sik Pyun),김준형(Jun-Hyung Kim),김경열(Kyung-Youl Kim),김기섭(Kim1 ?Ki-Sup),정철민(Chul-Min Jung),김찬기(Chan-Ki Kim) 대한조선학회 2012 大韓造船學會 論文集 Vol.49 No.4

엘리트 스포츠에 대한 제주도민의 의식 조사 연구

김승곤,정찬식 濟州大學敎 體育科學硏究所 1998 체육과학연구 Vol.4 No.-

The purpose of this study is to present the desirable ways of elite sport through the research of the consciousness of elite sport in Cheju-do To achieve the above.539 Cheju people were asked 56 questions about elite sport through questionnaires. And in this paper. T- test. ANOVA and x2(chi-squares) test methods through the use SAS were used to statistical significance. The concrete problem drawn from such an analysis are summarized as follows: 1. It is certain that most of the Cheju people trend to have a negative reply in the role of elite sport about promotions of sports itself or social relation. Most Cheju islanders think that elite sports seldom influence the social union, and the sound atmosphere of our nation. Therefore, to solve this problem, elite sport must be connected with the School sports and sport for all. 2. Cheju islanders consciousness about influence of sports activity is changing toward affirmative attitude after eighty-decade years. This result seems to be desirable to develop elite sport. 3. In a question of a sports administrative organization for athletes. most of cheju islanders trend to have a negative attitude about the chief of government or businessmen centered sports administrative activities. only physical directors sympathize with the leading role of an athletic organization. And both of them have no interest in relation to between the system of an local sport council and financial support from an local self-governing. 4. From the viewpoint of caring for student athletes. they dont think about many schools make an effort to cut down on a loss of student athletes schoolwork. and they also take preferential treatments and a scholarship for entering upon schooling as a matter of course. Especially they have a high opinion of school costs and offering lodging and boarding in the benefits of student athletes schoolwork. 5. Cheju islanders have not answer affirmative answer toward the local representative athletes or teams, but they agree to the necessity of the exchange between the elites from the different area and camp training. And they also know that the system of prize for elite athletes should be improved. 6. It is shown that an event or all-round games contribute to the activation of local athletics. and rearing for elite athletes. either. In relation to the managing a tournament, they note that the point to be considered are general indifference, an excessive competition. government-centered management, an excessive expenses in finance. the time fixed for an athletic meeting, managing an event. manpower mobilization, and a very extensive scale. 7. As regards the influence of community development through inducing or joining a nation athletic meet, they emphasize the progress of the athletes ability. After all. our cheju islanders think that the cooperation of mass communication must be needed to develop elite sports. And they question the problem of connection between the scientific program for elite sport and sports for all. Lastly they call for the conversion of understanding elite sport, the local dispersion of central sports event, and the reorganization of the sport government setups for elite.

부하병렬공진(LCC형) 이용한 고주파 DC-DC 컨버터의 특성해석

金重基,朴贊圭,南承植 영남이공대학 1997 論文集 Vol.26 No.-

This paper proposes the LCC type high frequency resonant DC-DC converter using Power MOSFET as switching devices, and describes the characteristics and operating principles. LCC converter has the resonant capacitor instead of a source decoupling capacitor in the conventional half bridge parallel resonant converter. This paper also shows an example of the converter design by the data, obtained from characteristic values. We performed an experiment to prove the propriety of proposed converter. As a result of comparison simulation waveforms with experimental waveforms, experimental results show that the tendensy of circuit analysis is correspond to the simulation waveforms.

國産活性炭에 의한 重金屬이온의 吸着特性

金燦國,金相烈,李成植 동아대학교 환경문제연구소 1980 硏究報告 Vol.4 No.1

Adsorption characteristics of chrome, cadminum, cupper and zinc ions on domestic activated carbon were studied by using two kinds of sources. The following conclusions were obtained from the effect of pH, anions and cyanide, adsorption velocity, adsorption isotherm on adsorption of the heavy metal ion and the desorption of the heavy metal ion from domestic activated carbon. 1) Chrome ion is readily adsorpted on activated carbon in the form as HCrO₄^(-) and CrO₄^(2-) in the pH range from 3 to 6 and adsorption velocity was almost come to the equilibriumin an hour. Adsorpted total chrome ion was readily eluted by using 1N-HCl. 2) From the adsorption of cadmium ion in the presense of iodide and bromide, cupper ion with halogen ion and zinc with halogen, it was found that they were easily adsorbed on activated carbon in the form of complex anions. 3) Adsorption isotherms of cupper with citric acid and zinc with cyanide on activated carbon were shown the Freundlich's equation. 4) Zinc complex anions were reversibly adsorbed on activated carbon and easily eluted with 0.1N-HCl.

재발 또는 불응성 비호즈킨 림프종 환자에서 CDME 구제항암화학요법 후 고용량 항암화학요법 및 자가말초혈액 조혈모세포이식의 효과

김세형,한강원,배상병,김찬규,이남수,이규택,박성규,원종호,홍대식,박희숙 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.1

Background and objectives : The long-term survival in patients with non-Hodgkin's lymphoma (NHL) after conventional dose chemotherapy is about 35% and the rest of the patients tend to have relapse. So, in relapsed or refractory NHL, we compared the outcome of patients undergoing high-dose chemotherapy with autologous peripheral blood stem cell transplantation(APBSCT) with only salvage chemotherapy of cisplatin, dexamethasone, mitoxantrone, and etoposide(CDME). Materials and methods : From June 1993 to December 1999, 25 patients with relapsed or resistant NHL were treated with CDME regimen as salvage chemotherapy. Twelve patients were received four cycles of CDME chemotherapy, and 13 patients were received high-dose chemotherapy with APBSCT following two cycles of CDME chemotherapy. Results : The median follow-up duration was 12.8 months(range:4-68). The overall response rate was 41.7% (complete response rate 25%, partial response rate 16.7%) in 12 patients with CDME only. Thirteen patients who were treated with high-dose chemotherapy with APBSCT achieved 61.5% complete response rate and 15.4% partial response rate, with an overall response rate of 76.9%. The estimated 3-year progression-free survival rate was significantly higher among patients who received high-dose therapy than patients who received CDME only(41.5% vs 20.0%, p<0.05). And, 3-year overall survival rate was significantly higher among patients who received high-dose therapy(51.3% vs 25.0%, p <0.05). Conclusions : In relapsed or refractory NHL, CDME chemotherapy is an effective salvage chemotherapy and allow peripheral blood stem cell collection. Also, high-dose chemotherapy with APBSCT following CDME is superior to CDME salvage chemotherapy only.

國産活性炭에 의한 重金屬이온의 吸着特性(Ⅲ)

金燦國,李成植 동아대학교 공과대학 부설 한국자원개발연구소 1982 硏究報告 Vol.6 No.1

Adsorption characteristics of nickel ion on demestic activated carbon were studies by using three kinds of sources. The following conclusion were obtained from the effect of pH, halides, cyanide and temperature, and adsorption velocity, adsorption isotherms on adsorption of nickel ion and the desorption of nickel ion from domestic activated carbon. 1) Nickel ion was reversibly adsorpted on activated carbon in the form of complex anion such as NiX^(2-)₄ and Ni(CN)^(2-)₄. Specially, the order of the magnitude of adsorption of halogenide ions was I^(-)>Br^(-)>CI^(-)>F^(-) which coinsided with that of hydrolysis tendency of halogenide ions. 2) From the adsorption of nickel ion in the presense of zinc ion, it was found that zinc ion prevented nickel ion from adsorption on activated carbon. 3) The adsorption isotherms of nickel ion on domestic carbons were well fitted Freundlich's equation. 4) Nickel complex anions on activated carbon were easily eluted by using 0.1N HCl solution.

복벽에 발생한 악성 말초신경초종

김찬규,박성규,홍대식 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Malignant peripheral nerve sheath tumor (MPNST) tend to develop in deep-seated large nerves, with the sciatic the most commonly affected nerve. We present a case of MPNST that developed at abdominal wall, without definite evidence of von Recklinghausen's disease. The patient was a 41-tr-old man who suffered from left flank and back pain. On physical examinations, 10 x 6 cm-sized mass palpated at left flank of abdomen. Excision and biopsy performed and he was diagnosed with MPNST.

小兒 알레르기性 紫斑症

金洪培,孫璨洛,姜德植,具滋薰 慶北大學校 醫科大學 1982 慶北醫大誌 Vol.23 No.2

저자는 1977년 1월부터 1982년 8월까지 5년 8개월간 경북의대 부속병원 소아과에 알레르기성 자반증으로 입원하였던 환아 36예를 대상으로 하여 다음과 같은 성적을 얻었다. 성별 분포는 남녀 각각 50%로서 차이가 없었고 계절별 분포는 상기도감염이 빈번한 봄, 겨울이 72.2%를 차지하였으며, 선행질환으로서는 상기도 감염이 69.4%에서 인지되었고 알레르기성 병력을 가진 환아는 13.9%였다. 임상증상은 피부병변이 100%, 위장관계 증상이 88.9%, 관절증상이 61.1%에서 나타났었다. 신장침범은 33.3%였으며 현미경적 혈뇨가 1예, 현미경적 혈뇨 및 경도의 단백뇨가 3예, 현미경적 혈뇨 및 심한 단백뇨가 2예였다. 육안적 혈뇨 및 경도의 단백뇨는 1예, 육안적 혈뇨 및 심한 단백뇨는 4예가 있었으며, RPGN이 1예였다. 이중 6예에서 신생검을 시행하였으며, 2예는 경도의 병변을 보였고 나머지 4예는 모두 반월체를 형성하는등 심한 병변을 보였다. RPGN 경과를 취한 1예는 사망하였다. 신침범과 이와 관련된다고 생각되는 인자들, 즉 5세 이상의 연령군, 성별, 위장관증상의 경중, 관절증상의 유무, 재발유무 등과의 관계를 살펴본 결과 신침범을 일으킨 환아에서 심한 위장관증상 및 재발율이 다소 높게 나타났으나, 통계적 처리로서는 특별한 의의가 없는 것으로 나타났다. A clinical observation has been made on 36 children with Henoch-Scho¨nlein perpura who were admitted to pediatric department of KNU hospital from January 1977 to August 1982. Rate of male to female patients was 1:1, and the majority of cases developed illness during spring and winter months. URI was noticed as preceding illness in 69.4% of cases, and allergic history was elicited in 13.9%. Clinical manifestations showed involvement of skin in 100%. GIT in 88.9%, joint in 61.9% and kidney in 33.3%. Out of 12 cases in whom nephritis developed, 1 case showed microscopic hematuria, 3 cases microscopic hematurai with mild proteinuria, 2 cases microspic hematuria with heavy proteinuria, 1 case macroscopic hematuria with mild proteinuria, 4 cases macroscopic hematuria with heavy proteinuria and 1 case RPGN. Percutaneous renal biopsy performed on 6 cases revealed minimal change in 2 cases and severe renal involvement with crescent formation in 4 cases. Relationship between renal involvement and other parameters including age grou over 5 years, sex, severity of GIT symptoms and presence of recurrence showed somewhat high incidence of severe GIT involvement and presence of recurrence in patients with renal involement. However statistical analysis showed no significant difference.