중대산업사고 예방을 위한 종합위험관리체제(IRMS) 구축에 관한 연구

권혁면,성대현,김재현,임대식,김기영,편무욱,문일,고재욱,이영순,윤인섭 한국안전학회 2003 한국안전학회지 Vol.18 No.3

The Process Safety Management (PSM) by the Law of Industry, Safety and Health has been performed for preventing major accidents of chemical plants since 1996. In terms of preventing chemical accidents more precisely, it is essential to develop a tool for quantitative risk assessment. For this, KOSHA (Korea Occupational Safety and Health Agency) developed an Integrated Risk Management System (IRMS) . The system is designed to assimilate data on chemical plant hazards from external database, to integrate these data with location information (topographic and demographic), and to make them user-friendly accessible. The system consists of several main functions: display of five major Korean petrochemical complex layout, display of equipment layout with its information utilizing the external database, zonation of the hazard effected area with consequence analyses, the most probable accident scenario generation, accident/incident database and calculation of frequency of accident using equipment reliability database, etc. The highlight of IRMS is to provide the risk contours using GIS(Geographical Information System) technology. IRMS is intended to manage hazardous installation more systematically and effectively, to reduce the number of accident remarkably, further minimizing production loss in the plant. The system is now under application to about 500 PSM sites as well as and emergency authorities in Korea by KOSHA (Korea Occupational Safety and Health Agency)

Multiple Spinal Intradural Schwannomas Combined with Sequestered Lumbar Disc Herniation

김대용,김진욱,정주호,조재훈 고신대학교 의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

In this report, we describe a case of multiple intradural schwannomas in the spine combined with a upward sequestered disc herniation at L4-L5. It is often difficult to differentiate this tumor from lumbar disc herniation, especially a sequestered hernia. Gadolinium-enhanced MR images were a useful preoperative examination modality for differentiating these lesions from other diseases. Microscopically, the intradural tumors were successfully removed. The dura maters of the L2 and S1 were opened microsurgically, allowing the nerve fibers involved in the tumor to be identified. The involved fibers were cut around the tumor, and the lesion was resected while the intact nerve fibers were preserved. An upward sequestered lumbar disc herniation at L4-L5 was also successfully removed. Based on histological examination of the resected specimen, the tumors were diagnosed as schwannomas. Microsurgery allowed the tumors to be removed with minimal impairment from cutting of nerve fibers in the each nerve root.

양측성 천막상부 뇌동맥류에 대한 일측성 일회접근 결찰술 : 증례보고

김대용,김진욱 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.2

양측성으로 천막상부의 뇌동맥류가 발견된 경우, 제한된 경우에 한해서, 일측성 테리온 접근법으로 일회 수술로 뇌동맥류 결찰술을 시행할 수가 있다. 48세 여성에서 좌측 중뇌동맥과 우측 전맥락동맥에 두 개의 뇌동맥류가 발견되었다. 우측 전맥락동맥류는 뒤쪽 방향을 향하는 양상이었다. 좌측 테리온 접근법으로 뇌동맥류 결찰술을 시행하였다. 좌측 중뇌동맥에 위치한 뇌동맥류를 결찰한 다음에, 우측 전맥락동맥에 위치한 뇌동맥류를 좌측 테리온 접근법으로 반대쪽 경동맥-시신경 지주막하 공간을 통하여 성공적으로 뇌동맥류 결찰술을 시행하였다. 저자는 양측성으로 천막상부의 뇌동맥류가 있는 경우에 편측 테리온 접근법으로 양쪽 뇌동맥류를 성공적으로 결찰하여, 2차 수술이 필요없게 된 증례를 보고하면서 문헌을 고찰하였다. Patients harboring bilateral supratentorial aneurysms can be approached via the contralateral pterional approach in selected cases. A 48-year-old woman was found to have two aneurysms at the left middle cerebral artery and the right anterior choroidal artery. The main direction of the anterior choroidal artery aneurysm was posterior. A direct clipping was performed via the left pterional approach. After the left middle cerebral artery aneurysm was clipped, the contralateral anterior choroidal artery aneurysm was further exposed and successfully clipped through the contralateral carotico-optic space. The author reports a case of bilateral supratentoral aneurysms that was successfully clipped via unilateral pterional approach, thus avoiding a second craniotomy.

이동 에이젼트를 이용한 전자시장의 설계 및 구현

방대욱,류은경 啓明大學校 産業技術硏究所 1999 産業技術硏究所 論文報告集 Vol.22 No.1

In the electronic marketplace which uses mobile agents as its infrastructure, users can disconnect their system after launching agents to perform their tasks and then receive the results from their agents when they want to view them. In this paper, we propose a framework of the electronic bidding marketplace based on mobile agent system, and implement the used automobile marketplace with this framework in order to show the strength of the electronic marketplace based on mobile agent systems. The proposed framework receives a proposal from end-users through the web browser, and launch a buyer agent to an agent server which implements the electronic marketplace, and then deliver the results, of which the buyer agent deals with seller agent, to the users. Also in our framework, a buyer agent can navigate agent servers on the Internet according to its itinerary.

동종의 동결건조 악관절원판 매식에 관한 실험적 연구

정대현,김경욱,임창준 단국대학교 치의학연구소 1994 단국대치의학연구소논문집 Vol.6 No.1

지방정부 관료의 조직시민행동에 대한 LMX의 영향 분석

김대원, 이재욱 신라대학교 부산학연구센터 2011 부산연구 Vol.9 No.1

조직의 효과성과 효율성(생산성 및 능률성을 포함)을 높이기 위한 가장 중요한 요소중의 하나가 조직 구성원이며, 이들의 적극적인 협조와 노력이 부족할 경우 조직의 존립도 담보할 수 없다. 본 연구는 조직의 효과성을 높이기 위해서는 조직 구성원들의 조직시민행동이 선행되어야 한다는 전제하에 이를 높이기 위한 방안으로 LMX를 선정하여 이들간의 관계를 분석하는 데 목적을 둔다. 이를 위해 이론적 논의를 통해 사회교환론적 시각에서 LMX와 조직시민행동에 대한 경로변인들의 이론적 근거를 제시하고, 변인들간의 영향경로를 분석할 수 있는 연구가설과 연구모형을 설정한 뒤 가설을 검증한다. 분석자료는 부산 및 경남 지역의 관료들을 대상으로 하였으며, 분석 결과, LMX는 조직시민행동에 정(+)의 영향을 미치는 것으로 나타났다. 따라서 본 연구는 신자유주의 가치관이 지배하고 있는 현실에서 자칫 소외되기 쉬운 정서적 관리를 통해 조직시민행동을 자극할 수 있고, 이를 통해 조직의 효과성을 높일 수 있다는 것을 명확히 하였다는 점에서 의미를 가진다. Using a sample of 200 public workers from local government organizations in Korea, this article aims to investigate the relationship between leader-member exchange(LMX) and organizational citizenship behavior(OCB) of the followers. Data were collected on a structured questionnaire containing standard scales of LMX and OCB. After establishing the psychometric properties of the scales, hypotheses were tested through statistical analysis of the data. The reliabilities of the scales has been verified through using Cronbach's α coefficient. The study proved that LMX had significantly correlated to all dimensions of OCBs.

기체 방사성 물질 제거를 위한 첨착 활성탄 필터 시스템 성능에 관한 연구

김대욱,손현철,이명석,이석범,박길문 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.1

This paper presents an application of impregnated activated carbon and impregnated activated carbon filters. They are used for the removal of gaseous radioactive materials at radioactive material handling facilities such as nuclear power plants and research facilities. High adsorption efficiencies as well as stability are required for them to remove hazardous radioactive gases such as activated free iodine released during normal operation or accident condition. This research was initiated to enhance the independence of nuclear industry and raise the level of nuclear technology to that of the leading nuclear nations. By attaining the capability of design and development of HVAC system, national technological competitiveness can be achieved. Also, the ground for technology export will be hardened. Therefore, it is well timed to initiate the project to develope those filter systems domestically utilizing all the relevant technologies available.

거래 및 교환적 심리계약 이행 지각이 정서 및 지속적 헌신에 미치는 영향 분석 : 경남지역 고등학생들을 중심으로

김대원, 이재욱 신라대학교 부산학연구센터 2013 부산연구 Vol.11 No.1

조직헌신의 영향 변인들에 대해 많은 연구가 이루어져 왔지만 심리적 계약과과의 연관성에 대한 연구는 소수에 불과하다. 본 연구는 학교 조직에서도 심리적 계약이 조직헌신의 중요한 영향 변인이라는 가정하에 이들 변인간의 관계를 경험적으로 분석하는데 목적을 두었다. 본 연구는 통제적 성과주의 가치가 지배하고 있는 현실의 학교조직에서 학생들의 단기적인 성과를 강조하는 거래적 계약보다는 교사와 학생들과의 심리적, 정서적 유대감을 통한 장기적인 성과 향상에 중점을 두는 교환적 계약이행의 지각을 고양시킴으로써 학생들의 조직헌신을 높일 수 있다는 것을 실증적으로 분석하였다는 점에서 의미를 가진다.

동종의 동결건조 악관절원판 매식에 관한 실험적 연구

정대현,김경욱,임창준 단국대학교 치의학연구소 1994 논문집 Vol.6 No.1

In occasions when articular disk is perforated or removed, restoring injured or resected disk and a normal bony structure of the joint is undoubtedly a choice of treatment. In such a case, various disk substitutes are being used, but considering the advantages, disadvantages and long-term prognosis of individual substitute materials for disc, there is still no ideal material closely resembling the original disk both functionally and histologically. Besides, owing to the unique characteristic disk in anatomic structure & tissue nature, material closely resembling the disk should be able to withstand the masticatory force and play a active role in jaw movement. From this point of view, lyophilized allogeneic articular disk could be the superior substitute in various aspects only if the problem of immunologic rejection can be solved. There upon the author grafted lyophilized allogeneic articular disks into the left TMJ of 15 male rabbits weighing about 3.0 ㎏. And also autogenous articular disks harvested from left TMJ were placed in to the defects of right articular disk and histological observation was performed to evaluate the efficiency of the lyophilized allogeneic TMJ disk as a disk substitute. The results were as follows ; 1. In groups where lyophilized allogeneic disks were grafted, most of the graft material resorbed in early stage whereas the one adjacent to synovial tissue relatively longer. From the 3rd week, synovial tissue proliferated actively, and chondrocyte like cell appeared in remaining graft material adjacent to synovial tissue at 6th week. 2. While lyophilized allogeneic disk was resorbed, new disk having similar form to that of the fibrous cartilage which grew from adjacent synovial membrane was partially formed owing to its action as space maintainer & matrix instead of removed disk. 3. New disk tissue formed from a mold of lyophilized allogeneic disk was functionally superior enough to protect the articular surfaces of the articular fossa & condyle well histologically. 4. Autogenous articular disk demonstrated a similar histological picture to normal articular disk at 1 week after grafting and almost normal articular disk & joint structures were seen at post-operative interval of 8 week. In this manner autogenous disk was shown to be superior to lyophilized allogeneic disk at early stage, but lyophilized allogeneic disk substitute was also evaluated to have sufficient efficiency as articular disk substitute because it was transformed into the new disk with time.

유전 알고리즘을 이용한 영상 영역화

하성욱,강대성 東亞大學校 大學院 1997 大學院論文集 Vol.22 No.-

This paper proposes a new image segmentation algorithm using GA(genetic algorithm) to solve the vigilance parameter problem of ACT(adaptive clustering technique). The solution of GA can be moving because of stochastic reinsertion and suffer from the premature convergence problem owing to deficiency of individuals before finding the optimal solution. We also suggest the GBR(great best reinsertion) technique to cope with the problem. GBR selects the individual in the child pool that has the fitness value superior to that of the individual in the parents pool. The experimental results show the proposed algorithm gives better performance than the ACT ones in Gaussian noise environments.