주요우울증이 근로자의 생산성에 미치는 영향 : WHO-HPQ(Health and Work Performance Questionnaire)를 이용한 예비연구

김원,황태연,함병주,이준석,최병휘,김세주,서용진,강은호,우종민 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

Objectives : Major depressive disorder (MDD) causes patients' distress and makes socioeconomic burden, both directly and indirectly. We used the concept of lost productive time (LPT) to estimate the indirect costs and calculated both absenteeism and presenteeism among workers with MDD. Mcthods : Depression group was recruited from workers visiting psychiatric outpatient clinic who had MDD without major physical or mental disorders (N= 106). Age and sex matched healthy control group was also recruited through advertisement (M=100). All participants completed a interview using WHO Health and Work Performance Questionnaire (HPQ), Job Stress Measurement Scale for Korean Employees, and Hamilton Rating Scale for Depression. Statistical analysis was performed with independent t-test or χ² test as characteristics of values (p=0.05). Results : The number of absence (0.94-day/month vs. 0.10-day/month, P=0.015) andthe numberofearly leaving (2.56-day/month vs. 0.24-day/month, P<0.001) were significantly higher in the depression group. Depression group evaluated their Perfor-mance level much lower than controls with significant value (5.16 vs. 7.62, P<0.001). In addition, depression group estimated their performance level during the last 4 weeks lower compared to the level of past 1-year (5.16 vs 6.63, P<0.001). The estimated costs of absenteeism in depression group were higher than controls by 2,520,000 Korean Won per year, and those of presenteeism were also higher by 4,880,000 Korean Won per year. The total costs of LPT in depression group were higher than controls by 7,400,000 Korean Won, which corresponds to 26% ofmean annual salary. In addition, the level of occupational stress, such as high demand and interpersonal conflict, was higher in the depression group. Conclusion : Major depressive disorder costs substantial productivity loss to workers and their company. Presenteeism imposes more time cost than absenteeism. Effectiveness trials are needed to devise cost-effective programs for the early detection and treatment of depression at the workplace.

삼차신경통으로 발현된 소뇌교각부의 표피양낭종 : 2례 증례보고

심재준,김범태,임수빈,신원한,최순관,변박장 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.8

1993學年度 新入生 實態調査

李泰健,元俊載 仁荷大學校 學生生活硏究所 1994 學生生活硏究 Vol.14 No.-

GIS와 항공정사사진을 이용한 산림정보 관리시스템 구축

김준범,조명희,권태호,김인호,조윤원,신동호 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.2

우리나라 산림행정 업무의 대부분은 서류 및 대장에 의존하고 있는 실정으로 신속, 정확하고 다양한 업무 처리를 위해서는 첨단의 공잔정보기술을 이용한 과학적인 산림정보 관리시스템의 개발이 시급하다. 특히 지리정보시스템(GIS)과 항공사진 활용기술의 도입은 산림이용기본계획이나 산지개발, 산림자원 관리 및 산림보호 정책 등의 의사결정지원에 효율적으로 기여할 수 있을 것이다. 본 연구에서는 GIS와 항공사진(1998년도 촬영)을 기반으로 주요 산림정보인 수치지도, 수치임상도, 임야도 및 관련 속성데이터 둥을 가공하여 DBMS(data base management system) 내에 저장하였으며, 이를 기반으로 세부 응용시스템인 지번별 임야정보 검색, 산지이용개발 정보관리, 법정제한림 정보관리, 산림자원 정보검색 등의 인터페이스를 개발함으로써 산림 관련 실무자가 산림정보의 종합적인 공간분석 및 질의 검색이 가능한 산림정보 관리시스템을 구축하였다. 본 시스템의 구축으로 산림의 효율적 관리는 물론, 경제적인 산림자원 및 임산업 육성과 쾌적한 산림환경을 조성할 수 있을 뿐만 아니라 관련 부서들 간의 표준화된 공간 자료 공유와 과학적인 정보체계의 연동으로 산림자원 관리를 위한 집약된 공간 및 전자 정보화 인프라 구축의 기반을 마련할 것으로 사료된다. Recently in order to more effectively and scientifically process forest official tasks, which have been focused on documents and inventories, they should be applied with the up-to-date spatial information technologies. Especially, the forest resource information management based on GIS (geographic information system) and aerial orthophoto is expected not only to play an important role as DSS (decision support system) for domestic forest conservation policy and forestry development industry but also to service forest resource information toward people such as the owners of a mountain rapidly. In this study, the important forest information such as digital topography map, digital forest type map, digital forest cadastral map, digital aerial photographs and attribute data were first reprocessed and constructed in DBMS (data base management system). In addition, forest officials could analyze and retrieve forest information by using detail sub-application systems such as forest cadastral retrieval, forest land development information management, reserved forest information management and forest resource information retrieval. For this, the user interface is developed by using Visual Basic 6.0 and MapObjects 2. 1 of ESRI based on CBD (component based development) technology. The result of developing this system will not only perform constructing economical forest and better environment but also be the foundation of domestic spatial technology for forest resource management.

新入生 實態調査의 縱斷的 比較硏究 : 1984학년도부터 1993학년도까지

李泰健,元俊載 仁荷大學校 學生生活硏究所 1994 學生生活硏究 Vol.14 No.-

한국의 금융·자본자유화가 금융·외환위기에 미친 영향에 대한 실증분석 : The role of Capital Account Liberalization Reexamined

유재원,김태준 한국국제통상학회 2004 국제통상연구 Vol.9 No.3

본고는 자본자유화가 외환위기의 주원인이었는가라는 종래의 논의에서 벗어나 대내적 금융자유화와 대외적 자본자유화의 효과를 균형적으로 고찰하였다. 또한 금융자유화와 자본자유화의 정도를 정책변화를 중심으로 정의하는 일반적 관행과 달리 자유화의 실제효과에 근거하여 정의하였다. 이들 자유화 및 위기변수로 이루어진 벡터자기오차모형을 추정한 결과, 금음자유화나 자본자유화가 외환위기를 초래하였다는 근거는 찾기 어려웠다. 금음자유화는 신용경색을 심화시켜 금융위기를 초래하였을 확률이 상당히 높지만, 금융위기가 외환위기로 발전하였다고 보기는 어렵다. 본격적인 금리자유화나 자본시장개방이 1990년대초부터 부분적으로 이루어지기 시작한 현실을 감안하면, 이러한 결과는 별로 이상할 것이 없다고도 할 수 있다. 자유화정책이 실제로 얼마나 충실하게 실행되었는가 의문시되는 상황이라면 더욱 그럴 것이다. 한편, 금융위기가 외환위기로 연결되었다는 가설을 증명하려면 금융위기를 초래한 요인에 대한 면밀한 검토가 이루어져야 할 것이다. Capital Account liberalization, particularly the premature liberalization of short-term capital flow, has been criticized as responsible for Korea's currency crisis in 1997. However, it remains controversial what are the characteristics and the fundamental causes of the crisis. This paper aims to clarify the role of the capital account liberalization in the currency crisis from the broader perspective of financial liberalization, which began in the 1980s. After defining indices of domestic and external financial liberalization, we analyze how these variables affected the banking crisis (measured as the degree of credit crunch) and the currency crisis (measured as the foreign exchange market pressure). The empirical evidence from Korea show that it is too naive to insist that the capital account liberalization was a major cause for currency crisis. It turns out to be groundless that the banking crisis resulted in the currency crisis. Meanwhile, deregulation of interest rate in Korea seems to have substantially affected the banking crisis.

능동 클램프 ZVS 플라이백 컨버터의 역률개선에 관한 연구

최태영,류동균,이우석,안정준,원충연,김수석 성균관대학교 2002 학술회의지원논문목록집 Vol.2002 No.-

본 논문에서는 single-stage, two-stage 두가지 역률보상(PFC)기법을 기존의 능동 클램프 플라이백 컨버터에 적용하여 역률 개선을 하였다. 삽입된 플라이백 컨버터의 능동클램프회로가 주스위치와 보조스위치의 영전압스위칭(ZVS)을 구현하며, 스위칭 손실을 줄임으로써 고효율을 얻을 수 있고, 높은 주파수에서의 스위칭이 가능하다. 하지만 일반적으로 사용되는 다이오드정류기, 평활용커패시터에 의한 낮은 역률의 문제점이 남아있다. 본 논문에서는 300W급 능동 클램프ZVS플라이백 컨버터를 설계하여 single-stage, two-stage방식을 적용, 입력역률개선을 시뮬레이션과 실험에 의해 입증하고자 한다. This paper analyzed PFC of active clamp ZVS flyback converter by adding two method PFC (Power Factor Correction) circuit - two-stage and single-stage. The addition of active clamp circuit also provide a mechanism for achieving ZVS of both the primary and auxiliary switches. ZVS also limits the turn off di/dt of the output rectifier, reducing rectifier switching loss and switching noise, due to diode reverse recovery. As a results, the proposed converters have characteristics of the reduced switching noise and high efficiency in comparison to conventional flyback converter. The simulation and experimental results show that the proposed converters improve the input PF of 300W ZVS flyback converter by adding single-stage, two-stage PFC circuit.

유약의 잔류응력과 탄성율의 도기질 타일의 유면균열에 미치는 영향

배원태,황규홍,박민준 慶尙大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.11 No.-

The relationship between the crazing of glaze surface and the mechanical properties such as the residual stress and the elasticity of glaze was investigated. The result of dilatometer test (Bullin-Green method and ?? method) and autoclaving test showed that the resistance of the glaze against the delayed crazing increased in proportion to the magnitude of residual compressive stress. By comparing the results of the cement mortar operation test, thermal shock test, blow test and the elasticity of the glaze measured by the supersonic pulse method, the glaze with low elasticity showed good parallel crazing resistance. SEM micrographs showed that delayed crazing was started at the interface of glaze and body and propagated to the both sides of glaze and body, but parallel crazing was started st the surface of the glaze and propagated to the inside of the glaze.

Monte Carlo 방법을 이용한 대기오염 배출률 예측의 불확실성 평가

정효준,김은한,서경석,황원태,한문희 한국환경과학회 2006 한국환경과학회지 Vol.15 No.4

조기위암의 임상적 연구

박태준,양은수,류종철,박태군,이희승,신원창,이진호,김관엽 인제대학교 1994 仁濟醫學 Vol.15 No.1

1989년 9월부터 1993년 7월까지 인제대학교 의과대학 상계백병원에서 실시한 위내시경 소견이 조기위암이며 내시경 직시하 생검결과 선암으로 판명되어, 근치적 위절제술을 시행받은 23명의 환자에서 임상적 특징을 알아보고, 문헌고찰과 함께 보고하는 바이다. The incidence and mortality rate of stomach cancer ranks well ahead of all malignancies in Korea. The prognosis is excellent in early gastric cancer of which the overall 5 years survival rate of 85∼95% is comparative with that of advanced gastric cancer of 15∼49%. So early detection with very sensitive mordality of gastroscope and surgery is the only premise to decrease the mortality rate of gastric cancer. This report deals with the clinical aspects of 23 cases of early gastric cancer, which were confirmed with histopathologic examination of resected stomach during the 4 years from September 1989 to July 1993 at Sanggye Paik hospital, Seoul, Korea. Out of 23 cases of early gastric cancer, 14 cases were male, 9 cases were female, and the male to female ratio was 1.6 : 1. The most common type of early gastric cancer was talc type(43.5%), IIc and its combined type comprised most of them(87.0%). The most prevalent sloe of lesion was gastric angle(43.5%) and the most common direction was lesser curvature(73.9%) 19 cases of 23(78.3%) were between 1∼3cm in size, and there was no statistical significance between the size of the lesion and lymph node metastasis. Of the 9 cases with mucosal lesion, there were 2 cases with lymph node metastasis(22.2%), but 7cases(50.0% ) of 14 cases with submucosal lesion presented lymph node metastasis. Diagnostic accuracy of endoscopy on detection of early gastric cancer was 17 cases(73.9%) of total 23 cases in our study. As with other report, histopathulogic examination of resected stomach revealed adenocarcinoma, tubular type as the most common type. Frequent complaint of patients with early gastric cancer was epigastric pain(65.2%), and duration of the symptom was less than 12 months in 17 cases(73.1%) of 23 patients with early gastric cancer.