A STUDY ON THE RISK PROTECTION OF THE MOLD TRANSFORMER

Chung,Young-Ki,Jung,Jong-Wook,Kim,Jae-Chul,Kwak,Hee-Ro,Lee,Su-Kyung 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

This paper investigates and analyzes the installation and failure status of mold transformer being used in domestic subways and describes the extinguishing process by time through the combustion test of winding part of mold transformer. Condition of installed mold transformers and classes of fire were surveyed and the mold transformer was burned in a horizontal heating furnace. It was confirmed that the mold transformer is self extinguishing and nonflammability. According to this results, the suitable standard of fire protection for the mold transformer was demanded after review of domestic and abroad law. It is expected that the cost of fire protection equipment can be reduced by using the status and combustion test result of mold transformer.

Rationalization of Budgetary Choices ( Rationalisation des Choix Budgetaires : R . C . B . ) in France : the Characte - ristics and Diffculties with its Application in Developing Countries .

CHUNG,Sae - Wook 한국행정학회 1973 韓國行政學報 Vol.7 No.-

HBV : Dynamic Change of HBsAg Titer during Anti-Viral Therapy in Treatment-Na?ve Patients with Chronic Hepatitis B

( Han Wook Chung ),( Yu Jin Ko ),( Sang Wook Lee ),( Hyun Woong Lee ),( Hyung Joon Kim ) 대한간학회 2013 춘·추계 학술대회 (KASL) Vol.2013 No.1

Background/Aims: Quantitative HBsAg (qHBsAg) titers are emerging as useful tools for measuring viral load and predicting predicting virologic response (VR). This study aimed to determine whether serial monitoring of HBsAg levels could predict virologic response to entecavir(ETV) & clevudine(CLV) therapy in treatment-naive patients with CHB Methods: A total of 157 treatment-naive patients with CHB, who visited Chung-Ang University Hospital between January 2007 and December 2008, were enrolled in this study (100 males). 97 patients(69 males, mean age 48) were treated with ETV for average 53 months, and 60 patients (31 males, mean age 43) were treated with CLV for 26months average. HBsAg levels were measured at baseline, week 12, 24, and 48. All patients were assessed for virological response (HBV DNA<140 copies/mL). Serum HBV DNA was quantified using the real time PCR assay (Artus HBV LC PCR Kit, Roche Diagnostics, lower limit of quantification, 140 copies/mL). Results: In 97 ETV-treated patients, the rates of virological response were 56.7% (55/97) at 48months and 60 CLV-treated patients, 30% (18/60) at 24 months, respectively. Mean reduction of baseline HBV DNA was -5.3, and -4.9 log10 copies/mL. In 55 VR patients treated with ETV, 43(78.1%) patients showed early decline of HBsAg titer and 31(56.3%) patients had lower baseline HBsAg levels (< 3.7 log IU/mL). In 18 VR patients treated with CLV, 9(50%) patients showed early decline of HBsAg titer and 11(61.1%) patients had also lower baseline HBsAg levels (< 3.7 log IU/mL) . Conclusions: Early decline of HBsAg was useful for predicting VR, and baseline HBsAg could be indicative as well in CHB patients treated with ETV than patients treated with CLV.

1인승 운송체계로서의 스쿠터 디자인에 관한 연구

정주현,이욱영 홍익대학교 산업디자인 연구소 2004 미술디자인 논문집 Vol.- No.9

오늘날 지구촌을 도심어디로 가더라도 날로 증가하는 차량으로 인해 극심한 교통전쟁을 치르고, 베기가스에 의한 환경오염은 심각한 수위에 와있다. 도시 생화자들에게 차량이용의 주목적이 출퇴근용이라는 것을 감안한다면 나 홀로 차량이 시내 운행의 대부분을 차지한다고 해도 과언이 아닐것이다. 나라마다 나름의 해결책으로 차량의 시내 진입을 억제하기 위해 대중교통의 활성화 또는 시내 진입 시 활증료의 부과 등 정책적인 방법으로 도시 운전자들에게 가하는 압박은 수위를 높여가고 있다. 본 연구는 이와 같이 시내를 중행하는 대부분의 차량이 1명만 탑승한다는 점과 항상 주차가 고민이라는 점을 해결하기 위한 새로운 방향을 모색하였다. 이에 최근 다시금 주목 받고 있는 스쿠터의 효율성을 인식하고 향후 1인승 운송기기로서의 새로운 가능성을 토대로 본 연구를 지행하였다. 스쿠터는 많은 모터사이클과 달리 경제적인 가격대와 실용성(수납박스, 쉬운 조작성, 저연비) 등 다른 모터사이클에서 느낄 수 없는 장점이 있다. 최근 이러한 실용성을 극대화한 BMW C1과 같은 새로운 형태의 스쿠터들이 많이 연구되고 있다. 이와 같은 스쿠터들은 기존의 실용성뿐만 아니라 운전자의 안전성을 극대화해주며, 또한 자동차와 같은 운전환경을 제공하고 있다. 본 연구는 기존의 실용성뿐만 아니라 운전자의 안전과 새로운 라이프 스타일에 부합하며 새로운 교통문화를 창출할 수 있는 스쿠터 디자인을 사례를 통해 제안하였다. Today, our world suffers severe traffic war since car is increasing day by day in every corner of the world and environmental pollution due to waste gas threatens to be aggravated. In view of present situation that main reason for using vehicles for citizen is going for work, it is not too much to say that most of running vehicles in city area should be driver only vehicles. Therefore, each countries intensify their pressure on drivers in city through employment of policies such as recommendation to use public transportation and imposition of premium charge for entering city area to restraint vehicles' entering to city. In this study, we had searched new direction to solve the problems that lack of parking lots and most of vehicles driving in city are single occupant's vehicles. Moreover, we could recognized that the effectiveness of Scooter that noticed again recently and had been studying based on new possibility of Scooter as a future single riding transportation tool. Scooter has many merits like economical price and practicalities such as container box, convenient control and high efficiency of gasoline that couldn't be felt from other motorcycles. Recently, new types of Scooter such as "BMW C1" that maximized practicality has been studied. These kind of Scooters not only maximize existing practicality but also safety of drivers, moreover, can provide driving circumstances as vehicles. This study proposed new design of Scooter that not only corresponds practicality and safety as well as new life style but also can create new traffic culture.

국내 기업의 비즈니스 프로세스 아웃소싱 영향요인에 관한 탐색적 연구 : 프로세스의 지식강도와 정보기술지원 정도를 중심으로 Focused on Knowledge Intensity and Degree of Informatization of Business Process

김정욱,박정훈,남기찬 한국경영과학회 2003 韓國經營科學會誌 Vol.28 No.3

With the increase of glooal Competition and the reduction of the lifecycle of business process, most leading companies begin to adopt BPO(Busine5s Process Outsourcing). by outsourcing the whole or part of their business process to external service Providers and focusing on their core capability in order to enhance their core competency In adopting BPO. it IS an important decision-making issue that which part of Process should be outsourced So identifying core/non-core process among the business processes is a prerequisite for managing corporate capability and performance of outsourcing. In this Study, by focusing on knowledge intensity and degree of informatization of the business process that are important factors in adopting BPO we have analyzed the current status of BPO adoption of domestic firms and proposed several guidelines for adopting BPO.

접착제와 와동형성의 차이에 따른 5급 복합레진 수복의 전향적 임상연구

이경욱,정세준,한영철,손호현,엄정문,오명환,조병훈 大韓齒科保存學會 2006 Restorative Dentistry & Endodontics Vol.31 No.4

본 연구의 목적은 복합레진을 이용한 비우식성 치경부 5급 병소 수복에 있어서, 3가지 다른 접착제를, 유지구를 부여한 치아와 부여하지 않은 치아에 적용하였을 때의 임상적인 효능의 차이를 비교하기 위함이다. 총 150개의 치아를 각각 25개씩 6개의 군으로 나누었다. A군 Scotchbond Multi-Purpose (SBMP, 3M ESPE, St, Paul, MN, USA, 4세대 접착제)를 사용하고 유지구를 부여하지 않음. B군: SBMP를 사용하고 유지구를 부여. C군: BC Plus (Vericom Co., Anyang, Gyeonggido, Korea, 5세대 접착제)를 사용하고 유지구를 부여하지 않음. D군: BC Plus를 사용하고 유지구를 부여. E군: Adper Prompt (3M ESPE, Seefeld, Germany, 6세대 접착제)를 사용하고 유지구를 부여하지 않음. F군: Adper Prompt를 사용하고 유지구를 부여. 모든 치아는 복합레진인 Denfil(Vericom Co., Anyang. Gyonggido. Korea)을 이용하여 충전하였다. 수복 직후와, 수복 6개월 후에 modified USPHS (United States Public Health Service) criteria에 따라 수복물을 임상적으로 평가하였다. 추가적으로 임상사진을 촬영하였으며, 에폭시 레진을 이용하여 복제한 후 주사전자현미경을 이용하여 이를 관찰하였다. 6개월 후 관찰 결과. alpha rating의 수가 각 실험군마다 동일하지는 않았지만, 통계적으로는 3가지의 접착제간에 유의할만한 차이는 없었고, 기계적인 유지구를 부여한 군과 부여하지 않은 군 간에도 유의할만한 차이는 없었다 (p > 0.05). 그러나 6개월의 관찰 기간은 일반적으로 기대되는 레진의 수명보다 짧기 때문에, 각 실험군 간의 차이를 알아보기 위해서는 추후 더 오랜 기간의 관찰이 요구된다. The purpose of this study is to evaluate prospectively the effect of different bonding systems and retention grooves on the clinical performance of resin restorations in non-carious cervical lesions (NCCLs). Thirty nine healthy adults who had at least 2 NCCLs in their promolar areas were included in this study. One hundred and fifty teeth were equally assigned to six groups; (A) Scotchbond Multi-Purpose (SBMP, 3M ESPE, St, Paul, MN, USA, 4th generation bonding system) without retention grooves; (B) SBMP with retention grooves: (C) BC Plus (Vericom Co., Anyang, Gyeonggido, Korea, 5th generation bonding system) without retention grooves; (D) BC Plus with retention grooves; (E) Adper Prompt (3M ESPE, Seefeld, Germany, 6th generation bonding system) without retention grooves: (F) Adper Prompt with retention grooves. All cavities were filled with a hybrid composite resin, Denfil (Vericom Co., Anyang, Gyeonggido, korea) by one operator. Restorations were evaluated at baseline and at 6-month recall, according to the modified USPHS (United states Public Health Service) criteria, Additionally, clinical photographs were taken and epoxy resin replicas were made for SEM evaluation. At 6-month recall, there were some differences in the number of alpha ratings among the experimental groups. But, despite the differences in the number of alpah ratings, there was no significant difference among the 3 adhesive systems (p > 0.05). There was also no significant difference between the groups with or without mechanical retention (p > 0.05). Follow-ups for longer periods than 6 months are needed to verify the clinical performance of different bonding systems and retention grooves. 〔J Kor Acad Cons Dent 31(4):300-311, 2006〕

음파 및 초음파기구를 이용한 근관형성법의 효율성에 관한 실험적 연구

김한욱,이정식 大韓齒科保存學會 1988 Restorative Dentistry & Endodontics Vol.13 No.1

Gu¨k 컨버어터에 의한 태양광 발전 시스템에 관한 연구

元忠淵,兪東旭,金學成 成均館大學校 科學技術硏究所 1992 論文集 Vol.42 No.2

The photovoltaic modules have each maximum power point, which depending on the intensity of sunlight, modules temperature and etc. Cu¨k converter is used to obtain the maximum charging power from photovoltaic modules to storage batteries. This paper proposed to a new tracking control method by detecting its current and voltage in photovoltaic power generation system controlled by microprocessor, in order to operate at the maximum power point tracking(MPPT) even if the sunlight and the temperature are validity of proposed MPPT method is verified by the simulations.

보건관리 대행사업 평가도구의 타당성, 신뢰도 및 인과관계 검증에 관한 연구

박정일,조병희,구정완,김광종,김현욱,원종욱,이명숙,정문희 가톨릭대학교 산업의학센터 2001 韓國의 産業醫學 Vol.40 No.1

In order to verify the validity, reliability and relativeness of preliminary evaluation tool for the group occupational health services(GOHS), a questionnaire survey for doctors, nurses and hygienists of 18 GOSH institutions, and employers, health managers and employees of 340 enterprises was conducted. A factor analysis and correlation test for the statistical validity of the variables in the evaluation tool, a Chronbach's Alpha value for the reliability in the evaluation indices and a regression analysis for the relations of the evaluation model were performed. The results were as follows: 1.In factor analysis, thirty-three variables among 43 variables were selected as significant variables, ie 9 out of 11 for input index, 11 out of 14 for throughout index and 13 out of 18 for out put index. 2.Three evaluation(outcome) scales(evaluation by employer, health manager and employee) which composed of 16 identical items were used. 3.The Chronbach's Alpha values of input, throughout, out put and outcome indices were 0.5221, 0.5473, 0.7122 and 0.8546 respectively. 4.Regression equations of independent variables on the evaluation scales of employer, health manager and employee were all statistically significant.

아말감 와동의 파절에 관한 2차원 유한요소법적 연구 Ⅰ : VARIATION OF THE WIDTH OF CAVITY 와동 폭의 변화

이정식,김한욱 大韓齒科保存學會 1995 Restorative Dentistry & Endodontics Vol.20 No.2