T1급 고속 암호 시스템에 관한 연구

이훈재,류명춘,오주환 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)

In this paper we propose a secure T1-rate digital image conference system which consists a stream cipher of 7-bit real adder with 2 bit carrys and a fast and stable 2-step full-duplex synchronization. And we analyze the cipher algorithm and the synchronization performance of the system.

자의퇴원의 결정요인에 대한 환자-대조군 연구 : 입원 및 재원 적절성을 중심으로

김도환,박훈기,이정권,이도희 大韓家庭醫學會 2000 Korean Journal of Family Medicine Vol.21 No.11

악성종양과 감별이 어려웠던 악안면 영역의 감염질환에 대한 치험례

서재훈,김영균,여환호 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.3

It is very difficult to differentiate the malignant tumor from the maxillofacial infections that have unclear cause, severe indurated swelling, pain and nonresponsiveness to antibioitic treatment and incision and drainage. Incisional biopsy, CT, and MRI examination may not distinguish between infection and a malignant tumors. And then, the clinicians can make a mistake that they perform a unnecessary radical surgery because of inaccurate diagnosis. We present three case reports of maxillofacial infectious disease with diagnosis process, treatment and differential diagnosis. The infectious disease were not resolved with antibiotic and surgical drainage. The progression of clinical sign and radiographic, indings of these disease were masqueraded as malignant tumors.

웹 서버상에서 PHP 스크립트 언어를 이용한 회원관리 시스템 구현

이훈재,오주환 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)

많은 사람들은 자신들의 필요나 호기심에 의하여 직접 게시판이나 대화방과 같은 회원관리 프로그램을 만들고 싶어하며 기존의 C나 Perl을 대신하여 PHP라는 간단한 스크립트 언어로 이를 실현할 수 있게 되었다. 본 연구에서는 PHP 스크립트 언어를 이용하여 웹 서버상에서 회원관리가 가능한 사용자 로그인 및 쪽지 보내기 기능을 갖는 회원관리 시스템을 구현하였다. 구현된 시스템은 PHP를 구동시키는 리눅스 OS를 실제 서버로 사용하였다. 본 연구에서는 이전까지 일반인들의 접근이 힘든 스크립트 언어가 얼마나 대중성을 갖게 될 것인지 간단히 구현해 보는데 큰 의미를 두고 있다.

Stevens-Johnson 증후군: 증례보고 및 문헌고찰

여환호,김영균,서재훈 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.1

The Stevens-Johnson syndrome is a severe form of erythema multiforme associated with multiple organ involvement that can result in severe mortality. There are many etiologic factors including drugs, infection, or stress ; but accurate pathogenesis is still obscure. Treatments are composed of the removal of possible etiologic factors, symptomatic and supportive treatment. We experienced a case of Stevens-Johnson syndrome with involvement of generalized skin, oral mucosa, and eye involvement. This patient was treated by symptomatic and preventive method including corticostervid, antihystamine, and opthalmic treatment.

중학교 응급처치 교육의 실태 조사 연구

김훈철,김세환,박기동,김승재 강원대학교 체육과학연구소 2000 江原大學校附設體育科學硏究所論文集 Vol.- No.23

The purpose of this study was to investigate the current status of first aids program in the safety education that was a part of the physical education curriculum in middle school. And this study is to supply the fundamental data for efficient safety education. The data was gathered with questionnaires given to 145 physical education teachers in Kangwon Province. Teachers think that the first aids education is essential in middle school curriculum. Taking considerations of the numerous accidents in society. This need will provide a remedy for any emergent situation and enlighten the safety-first-mind to protect against accidents. However, it is difficult to determine that efficient and good quality of first aids education is implemented in middle school. Based on the data, followings are some findings from the result; a) teachers lack experiences with first aids education, b) teachers are not equipped with sufficient theoretical and practical knowledge about first aids, and c) classroom teaching materials for first aids education are not furnished in the school at all. To suggest based on the above conclusions, the information about first aids must be employed in depth during the training period for present teachers along with learning physical education teachers so as to develop the theoretical knowledge and applicable capability about the education. Schools must stock adequate teaching materials for first aids education, and seek for effective and high quality education.

판형열교환기의 성능 예측에 관한 수치적 연구

최훈기,김철환,유근종 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

The performance prediction is important to reduce the consumption of time and cost in a design step of the plate heat exchanger(PHE). A numerical analysis is performed to study about it in the PHE. This study used a standard k-ε turbulence model for the numerical analysis. Results of the numerical analysis art verified against experimental data in references. Comparison of fanning friction factor and Nusselt number shows a good agreement with the experimental data when the shape information of a plate is exact.

중소규모 사업장 근로자의 직무스트레스로 인한 결근, 조퇴 현황과 한국형직무스트레스 하부요인과의 관련성

김정훈,박신구,김동현,김환철,임종한,이의철,이동훈,이지영 大韓産業醫學會 2009 대한직업환경의학회지 Vol.21 No.2

목적: 중소규모 사업장 근로자들의 직무 스트레스로 인한 결근, 조퇴의 현황과 한국형 직무 스트레스 하부 요인과의 관련성을 알아보고자 하였다. 방법: 중소규모 사업장 83곳 근로자들에 대해 한국형 직무스트레스요인 평가도구-단축형(KOSS-SF)과 사회 일반적 특성, 직업적 특정 및 직무스트레스로 인한 결근이나 조퇴 경험여부 등을 묻는 구조화된 자가 기입식 설문을 실시하였고, 응답한 4,350명에 대해 최종 분석을 시행하였다. 직무스트레스로 인한 결근, 조퇴와 한국형 직무스트레스 하부 요인들과의 관련성을 확인하기 위하여 로지스틱 회귀분석을 시행 하였다. 결과: 직무 스트레스로 인한 결근, 조퇴를 한 근로자는 남자에서 7%(196명), 여자에서 8%(113명) 로 조사되었고 한국형 직무 스트레스 하부요인과의 관련성에서는 남, 여 모두 직무요구, 관계갈등, 조직체계, 보상부적절, 직장문화 영역의 스트레스가 높은 군에서 통계적으로 의미있게 직무스트레스로 인한 결근, 조퇴율이 증가하였다. 결론: 중소규모 사업장 근로자들의 직무 스트레스로 인한 결근, 조퇴와 한국형 직무 스트레스 하부요인과의 관련성은 남자에서는 조직체계 영역이 가장 높았고, 여자는 직장문화 영역에서 가장 높은 관련성을 보였다. Objective: The aim of this study was to examine the actual conditions of absence and early leave due to job stress of 4,350 workers in 83 small and medium scale industries, and its relationship to job stress factors using Korean Occupational Stress Scale-Short Form (KOSS-SF). Methods: A structured self-reported questionnaire was used to assess each respondent's Sociodemographics, job stress, experience of absence and early leave due to job stress. Seven KOSS-SF domains of job stress were used. We estimated the relation of absence and early leave due to job stress and job stress factors using logistic regression analyses. Results: Absence or early leave due to job stress occurred in 7% of male workers and 8% of female workers. Multiple regression analysis revealed a significantly positive association job stress-related absence/early leave and job demand, interpersonal conflict, organizational system, lack of rewards and occupational climate. Conclusions: Absence and early leave due to job stress is significantly attributed to organizational System and lack of reward for men, and occupational climate and organizational system for women.

실리콘 겔에 활성화된 복강 대식세포의 interleukin-6 및 tumor necrosis factor-α에 의한 섬유모세포 중식 자극

김환묵,한상배,이백권,이종원,한기택,천지훈 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.5

Silicone gel breast implants may induce local(fibrous capsular contracture) or systemic(rheumatoid arthritis, systemic sclerosis, etc) complications. The exact mechanism of fibrous capsular contracture has not been fully understood. In the present study, we tried to find out the effect of silicone gel on the fibroblast proliferation which has been known as a major contributing factor in fibrous capsular contracture formation. In vitro, activated macrophages are known to secrete monokines which affect fibroblast proliferation and collagen synthesis. And tumour necrosis factor-α(TNF-α) and interleukin-6(IL-6), which were released by macrophages, were reported as potent stimulator of fibroblast proliferation. The goal of this study is to investigate the role of macrophages and tumour necrosis factor-αor interleukin-6 in the interaction of fibroblasts and silicone gel. We designed four groups, two experimental and two control, using Institute for Cancer Research(ICR) mouse peritioneal macrophage and silicone gel. For the preparation of the conditioned medium of macrophages, peritoneal macrophages were prepared and cultured for 24 hours on the silicone gel-coated and naked (not coated) surface [silicone gel-macrophage conditioned medium(SCM; experimental group) and normal polystyrene-macrophage conditioned medium(NCM; control group) respectively]. To correct the effect of 10% fetal bovine serum which was included in Rapid Prototyping and Manufacturing Institute (RPMI) 1640 medium and draw the effect only by macrophages, the RPMI 1640 medium with 10% fetal bovine serum was cultured by the same method on the silicone gel-coated and naked surface (silicone gel-macrophage free conditioned medium; SFM and normal polystyrene-macrophage free conditioned medium; NFM respectively). Each conditioned medium was added onto NIH 3T3 fibroblasts culture at a final 25% concentration of total culture medium and followed by the cultivation for 24 hours. For antibody neutralizing experiments, each conditioned medium was preincubated with polyclonal rabbit anti-mouse TNF-α antibody or polyclonal rat anti-mouse IL-6 antibody for 1 hour and then, conditioned medium with antibody was added to the culture medium of NIH 3T3 fibroblasts by the same method. After 24 hours cultivation, total number of viable fibroblast(cell growth), DNA synthesis and collagen synthesis of fibroblasts with each medium were measured by sulforhodamine B(SRB) assay, 3H-thymidine and 3H-proline incorporation respectively. The results were as follows: 1. In the experiment about the effect of the conditioned medium on the fibroblast activity, the experimental group(SCM), compared with the control group(NCM), showed a significant increase of the cell growth (p<0.01), a significant decrease of DNA synthesis(p<0.001), but no significant difference in the collagen synthesis. 2. In the experiment about the effect of polyclonal rabbit anti-mouse TNF-α antibody on the fibroblast activity, after the addition of antibody the experimental group, compared with the control group, showed a significant decrease of the cell growth(p<0.001), a significant increase of DNA synthesis(p<0.01), but no significant difference in the collagen syn thesis. 3. In the experiment about the effect of polyclonal rat anti-mouse IL-6 antibody on the fibroblast activity, after the addition of antibody the experimental group, compared with the control group, showed a significant decrease of the cell growth(p<0.001), a significant increase of DNA synthesis(p<0.0001), but no significant difference in the collagen synthesis. In conclusion, culture supernatants (conditioned medium) of peritoneal macrophages, activated by silicone gel, stimulate the NIH 3T3 fibroblast proliferation. TNF-α and IL-6, products of macrophage, are involved in the stimulation of NIH 3T3 fibroblast proliferation in an in vitro condition.

전주, 이리 주부 소비자들의 불평행동 유형과 소비자태도 유형

김정훈,동환숙 圓光大學校 1995 論文集 Vol.29 No.2

본 연구는 주부 소비자들의 불평행동 유형과 소비자태도 유형을 파악하여 그 관계를 분석하는데 그 목적이 있다. 이상의 결과, 주부 소비자들은 사적 불평행동을 가장 많이 취하며 구매상황에서는 주저형의 소비자태도를 취하는 것으로 나타났다. 불평행동 유형에 따른 판매자와의 상호관계에서는 정직성의 영역에서만 유의한 차이를 발견할 수 있었고, 소비자태도 유형에 따른 판매자와의 상호관계에서는 신뢰관계와 정직성에서 유의차가 발견되었다. The purposes of this study were to analyze types of the complaining behavior and the consumer attitudes of the their relationships. The data for the present study was collected in Iri and Chunju, Chunlabuk-do during october, 1994. 300 questionnaires were distributed and 250 of them were used for the final anaysis. A confidence level of p<10 was chosen by the researcher as the criterion for rejection of the null hypotheses. As results of this study, The were significant differences in the honesty and the recognition about psychological costs related to types of wives complaining behavior. Among types of consumer attitudes, the significant differences were found in the trust and the honesty related to seller-consumer interaction for wives group.