CT performance phantom을 이용한 cone beam형 전산화단층영상의 특성

한충완,김규태,최용석,황의환 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.3

Purpose : To evaluate the characteristics of (widely used) cone beam computed tomography (CBCT) images. Materials and Methods : Images were obtained with CT performance phantoms (The American Association of Physicists in Medicine; AAPM). CT phantom as the destination by using PSR 9000N™ dental CT system (Asahi Roentgen Ind. Co., Ltd., Japan) and i-CAT CBCT (Imaging Science International Inc., USA) that have different kinds of detectors and field of view, and compared these images with the CT number for linear attenuation, contrast resolution, and spatial resolution. Results : CT number of both PSR 9000N™ dental CT system and i-CAT CBCT did not conform to the base value of CT performance phantom. The contrast of i-CAT CBCT is higher than that of PSR 9000N™ dental CT system. Both contrasts were increased according to thickness of cross section. Spatial resolution and shapes of reappearance was possible up to 0.6 mm in PSR 9000N™ dental CT system and up to 1.0 mm in i-CAT CBCT. Low contrast resolution in region of low contrast sensitivity revealed low level at PSR 9000N™ dental CT system and i-CAT CBCT. Conclusion : CBCT images revealed higher spatial resolution, however, contrast resolution in region of low contrast sensitivity was the inferiority of image characteristics.

유도 '되치기 본'의 개선 방안에 관한 연구

김의환,김도준,김규수,김관현,김종달,최종삼,조용철,박순진,윤익선,안병근,정 훈,김미정,한성철 龍仁大學校 武道硏究所 1999 武道硏究所誌 Vol.10 No.1

The purpose of this study was to reform practically a Korean Judo's Doechigi-Bon(Forms of Counterattack, judo's Gaeshi no Kata, Judo's Uradori no Kata, Judo's Gonosen no Kata) that was established in 1955 Korea, according to changing of techniques by Judo's modernization, in order to have Judo's carefulness and systematic diffusion. Reform procedure of Judo's Doechigi-Bon was 1st stage, Questionnaire survey 303 judokas, 2nd stage, Technical seminar by judo experts(12 judo professor) 4 times, 3rd stage, wording report for reform, 4rd stage, Discussion and judgement of Teaching and Judgement commission of Korean judo Association(KJA), 5th stage, Public hearing for reform in KJA, 6th stage, Report and decision of board of directors in KJA, 7th stage, public publication of Judo News(No.53) in KJA. Basic principle of reform of Judo's Doechigi-Bon were as table 1. Table 1. Basic principle of reform of Judo's Doechigi-Bon ------------------------------------------------------------------------------- Items Reformed Key Points of Judo's Doechigi-Bon ------------------------------------------------------------------------------- 1. Structure 1) Grand classification : Classified by 3 parts(1,2,3Gyo) 2)Medium classification : Te waza, Goshi waza, Ashi waza devided per each part(Gyo) 3)Sub-classification : Classified five techniques per each part(Gyo) 2. Contents 1) Selected established techniques as possible 2) Considered rationalty and overlapping of counterattack techniques 3. Decision of Conterattack techniques 1) Refered to results of Basic Questionnaire survey 2) Priority to decisions of Judo expert technical seminar -------------------------------------------------------------------------------- Reformed Korean Judo's Doechigi-Bon(Forms of Counterattack techniques-KJA, 1999) are as follows: 1. Gyo; ① Uki otoshi -> Uchi mata ② Harai goshi -> Harai goshi gaeshi ③ O soto gari -> O soto gake ④ Ko uchi gari -> Sasae tsurikomi ashi ⑤ O uchi gari -> Ko soto gari 2. Gyo; ① Ippon seoi nage -> Okuri eri jime ② Tsuri domi goshi -> Uki waza ③ Okuri ashi harai -> Okuri ashi harai ④ Ko soto gari -> Tai otoshi ⑤ Hiza guruma -> Hiza guruma 3. Gyo; ① Kata guruma -> Sumi gaeshi ② Tai otoshi -> Ko soto gari ③ Hane goshi -> Harai tsurikomi ashi ④ Uchi mata -> Tai otoshi ⑤ Tomoe nage -> O uchi gari

여성형 유방과 남성유방암에서 HER-2/neu, ER 및 PR의 발현 양상

김세환,김의환 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

To observe the expression of HER-2/neu, ER and PR in breast lesions, such as 14 cases of Gynecornastia, 1 case of invasive papillary carcinoma and 1 case of invasive ductal carcinoma in man and to evaluate the correlation beween results, the authors has been carried out immunohistochemical staining with monoclonal antibodies to HER-2/neu, ER and PR. So, following results are obtained. 1. In Gynecomastia, the HER-2/neu showed weaky positive reactino (score 1) in florid area, but negative reaction in fibrotic area. 2. In Gyneomastia, ER showed 50% positive reaction and PR show 87% positve reaction both in florid and fibrotic area. The ER positive case did not observed among PR negative cases. 3. In male breast carcinoma, the HER-2/neu showed score 3 regardless of cancer type. 4. In male breast carcinoma, the expression pattern of ER and PR show stronger in invastive papillary carcinoma than invasive ductal carcinoma.

사무직 근로자에서 직무스트레스 및 VDT작업과 목·어깨 근골격계 증상과의 관련성

이의철,김환철,정달영,김동현,임종한,박신구 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.3

섬유종류 및 잔골재용적비에 따른 HPFRCC의 공학적 특성에 관한 실험적 연구

이의배,이동혁,나철성,조봉석,김재환,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

In general, concrete showed brittle fracture but HPFRCC(High Performance fiber reinforced cementitious composite) showed ultra high ductile behavior in the hardened state, because of the fiber bridging properties. So a variety of experiments have being performed to access the performance of HPFRCC recently. In this study, to develope HPFRCC with high ductility and strain capacity, effects of fiber types and sand volume fraction were investigated. And results of this study were as follows; · HPFRCC reinforced with PVA or hybrid fiber were superior to PP or singleness. · Effect of sand volume fraction on HPFRCC reinforced with PP was insignificant.

2000년 시드니 올림픽 유도경기 대비 세계 우수선수들의 개인별 기술 및 패턴에 관한 연구 : 남자선수를 중심으로

김종달,김규수,한성철,최종삼,윤익선,조용철,김의환 용인대학교 무도연구소 2000 武道硏究所誌 Vol.11 No.1

The purpose of this study was to analyze international contest levels and the competition techniques traits of each category, individual scoring - losing techniques of world elite judokas who were awarded in the international judo tournaments (I.J.T.) (part 1: ~O.G '96, part 2 :from O.G '96 to July, 2000), and who are expected to participate in the 27th Olympic Games(O.G.) Sydney 2000 to prepare the 27th O.G. which will be held from 16. to 22. September 2000 at Exhibition (Center, Darling Harbour, in Sydney, Australia The records of the results and contents of competition were obtained out of (115 for man,) I.J.T., world elite judokas. To decide individual contest levels, groups were derided into 3(A,B,C)groups and points were graded by 3 ways. The I.J.T. that were derided into 3 groups are shown in the table 1.

직무스트레스와 감기와의 관련성

김동현,박신구,김환철,이의철,김정훈,임종한 大韓産業醫學會 2008 대한직업환경의학회지 Vol.20 No.2

목적: 국내외를 통해 직무스트레스와 감기 등과 같은 감염질환과의 관련성에 대한 연구는 많지 않으며, 특히 국내에서의 연구는 거의 전무한 실정이다. 이에 직무스트레스와 감기와의 관련성을 확인하고자 한다. 방법: 일개 대학병원의 산업의학과에서 보건관리대행을 이행하고 있는 83개의 사업장, 근로자 6,699명에 대해 한국형직무스트레스-단축형(KOSS-SF) 설문지를 배부하였고 회수된 4,637명의 설문지 중 부적절한 응답과 다른 호흡기와 관련한 폐질환을 앓고 있는 237명을 제외한 최종분석 근로자 4,400명(65.7%)의 설문자료를 근거로 연구를 시행하였다. 결과: 감기 경험과의 단변량분석에서 유의한 차이를 보인 요인들과 일상생활 스트레스를 보정한 후 시행한 직무스트레스와 감기 경험과의 로지스틱 희귀분석 결과 직무 자율성 결여를 제외한 직무스트레스 하부 영역 전반(직무요구, 관계갈등, 직무불안정, 조직체계, 보상부적절, 직장문화)에 걸쳐 통계적으로 유의한 차이를 보여주었다. 또한 직무스트레스와 감기 경협 첫수와의 관련성을 확인하기위한 다중회귀분석에서도 비슷한 양상을 보였다. 결론: 직무자율성 결여를 제의한 한국형 직무스트레스 요인 전체가 감기와 관련성을 나타내었다. Objectives: To investigate the relationship between job stress and the common cold which is one of the most common infectious disease. Methods: A KOSS (Korean Occupational Stress Scale)-based questionnaire survey was conducted targeting 6,699 workers, of which 4,637 questionnaires were returned and the data for 237 were excluded due to poor response and having pulmonary disease other than common cold. Consequently, 4,400 (65.7%) returned questionnaires were analyzed. Multiple logistic regression analysis and multiple linear regression, adjusted for daily life stress, confounding variables and both, were used to evaluate the relationship between job stress and the common cold. Results: After adjustment for confounding variables and daily life stress, most of the subscales of job stress contributed to an increased risk of common cold. Conclusions: These results indicated that job stress may play a significant role in increasing the risk of the common cold and that further preventive efforts and studies are needed to reduce job stress and address infectious disease caused by job stress among Korean employees.

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.

Azoloquinoxaline類의 간편한 合成에 관한 硏究 : 第1報

郭美玉,南順花,金恩慶,金眞姬,韓盛旭,李萬佶,朴義煥,金浩植 고신대학교 자연과학연구소 1993 고신대학교 자연과학연구소 논문집 Vol.3 No.-

The reaction of 2, 6-dichoroquinoxaline with m-chloroperbenzoic acid gave 2, 6-dichloroquinoxaline 4-oxide, whose reaction with sodium azide provided 7-chlorotetrazolo[1, 5-a]quinoxaline 5-oxide and not the isomeric azide. The structures of the synthesized compounds were confirmed on the basis of IR, ¹H-NMR, elemental analysis and mass spectral data.

국내 다기관에서 조사한 지역사회획득 메티실린내성 황색포도알균의 빈도와 임상적 특성

송진수,최평균,송경호,조재현,김성한,방지환,이창섭,박경화,박경운,신수,최희정,김의석,김동민,이미숙,박완범,김남중,오명돈,김의종,김홍빈,최강원 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

목적 : 최근 전세계적으로 지역사회획득 메티실린내성 황색포도알균(community-associated methicillin-resistant Staphylococcus aureus, CA-MRSA)의 보고가 증가하고 있다. 하지만, 우리나라에서는 CA-MRSA 감염증에 대한 증례보고만 있을 뿐 아직까지 체계적인 연구결과가 없는 실정이다. 저자들은 국내에서 CA-MRSA의 빈도, 감염증의 임상적 양상, 분리된 균주의 항균제내성 양상을 조사하였다. 재료 및 방법 : 2005년 1월부터 2005년 6월까지 7개 병원에서 MRSA가 분리된 환자의 명단을 파악한 후 의무기록지와 건강보험심사평가원의 자료를 검토하였다. 외래나 응급실에서 혹은 입원 후 72시간 이내에 균주가 분리되고 MRSA 획득과 관련된 위험인자가 없는 경우 CA-MRSA로 정의하였으며, 분리된 균주의 임상적 의미에 따라 원인병원체(pathogen), 집락화(colonizer), 미결정(undetermined)으로 분류하였다. Penicillin과 oxacillin을 제외하고 3개 이상의 다른 계열 항균제에 내성이면 다제내성으로 정의하였다. 결과 : 연구기간동안 총 3,251주의 황색포도알균이 분리되었으며, 이 중 MRSA는 1,900주(58.4%)였다. MRSA 가운데 CA-MRSA는 114주(6.0%) 였으며, 이들이 분리된 부위는 귀(62주), 비뇨기계(14주), 피부 및 연부조직(11주), 호흡기계(10주), 혈액(3주) 등이었다. CA-MRSA 균주 가운데 집락균은 22주, 원인병원체는 22주였으며, 나머지 균주에 대해서는 그 임상적 의미를 결정할 수 없었다. 항균제 감수성 검사를 시행한 73균주 중 47주(64.4%)는 다제내성이었다. CA-MRSA 감염증 22예 중 피부 및 연부조직 감염(9예)과 중이염/외이도염(9예)이 가장 흔하였다. 침습적 감염증(invasive infection)은 4명(원발성 균혈증 3예, 감염성 관절염 1예)에서 확인되었지만, CA-MRSA 감염증으로 사망한 환자는 없었다. 결론 : 병원내 감염증에서는 MRSA가 심각한 문제이지만, 아직까지 지역사회 감염증에서 CA-MRSA는 흔하지 않았다. Background : Methicillin-resistant Staphylococcus aureus (MRSA) infection has emerged in patients who do not have the established risk factors. In Korea, little is known about the epidemiology and clinical features of community-associated MRSA (CA-MRSA). Material and Methods : Clinical microbiology laboratory databases of 7 hospitals were reviewed to identify the patients from whom MRSA was isolated during the period of January to July 2005. Only one isolate per patient was enrolled. In order to identify the risk factors of MRSA acquisition, the medical records and the Health Insurance Review Agency databases were reviewed. CA-MRSA was defined as MRSA isolated from patient without established risk factors. We analyzed patient demographics, underlying medical conditions, characteristics of infection, and antimicrobial susceptibility profiles. Results : Of total 3,251 S. aureus isolates, 1900 (58.4%) were MRSAs. Of the MRSA isolates, 114 (6.0%) were CA-MRSA. Of 114 CA-MRSA isolates, 22 (19.3%) were colonizers, 22 (19.3%) were pathogens, and the clinical significance of remaining 70 (61.4%) could not be determined. Median age of the 22 patients with CA-MRSA disease was 47 years. Nine patients had skin and soft tissue infections, 9 ear infections, 3 bacteremia, 1 septic arthritis. Seven patients had underlying medical disease. None died of the CA-MRSA infections. Of the 73 isolates of CA-MRSA, 47 (64.4%) were resistant to more than 3 classes of antibiotics besides β-lactams. Conclusion : Although MRSA is highly prevalent among hospital-associated S. aureus infection, CA-MRSA infections are not common.