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)

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.

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.

포스트-텐션 프리캐스트 외부 넓은 보-기둥 접합부의 비탄성 거동

박상욱,최윤철,김영찬,김대중,임재형,권기혁,문정호,이리형 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Experimental results from the cycle lateral load tests for post-tensioned precast wide beam-column connections were presented. Six exterior beam-column assemblages of half scale were tested in the laboratory. The specimens consist of U-shaped precast wide beams and concrete columns. The continuity at the beam-column joint is achieved with the topping concrete and post-tensioning. The specimens were designed with parameters of the beam-to-column depth ration and the number of tendons within column core. The test results showed that the post-tensioned precast wide beam-column connection satisfied the provisional standard by ACI of acceptance criteria for concrete special moment frames.

MMSOFM과 블록 매칭을 이용한 얼굴 추출 방법에 관한 연구

하성욱,강대성 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.1

It had be shown that features can be characterized in various background images, and that this methods can be overcome for numerous limited vectors. Possible applications of such techniques could be, in fact, found in few different fields, ranging from machine vision to video compression. In this paper an algorithm, based on MMSOFM(Min-Max self organizing feature map), block matching and moving perception, for moving stream images of frame, and features based face shape is described. The perpomance of the proposed algorithm, with considerable reduction in computation. The number of face extraction improves as the trained vectors alapted on MMSOFM and block matching.

MIN-MAX SOFM과 객체 분석을 이용한 얼굴 검출 알고리즘 개발

하성욱,강대성,권기항 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

This paper proposes a face region detecting algorithm in stream images. The main limitation of current face detection researches is the front face detection. But, the face detection in stream images needs to extract features in various angles. Current algorithms also are not enough to be applied to the real world from the several limited arguments as uniform luminous intensity, simple background, etc. This reserch suggests a detection algorithm of stream face images which is regardless of these limit arguments. The firs stage supports a proposition of MIN-MAX SOFM(self organizing feature maps) by applied MIN-MAX theory in SOFM which is independent on luminous intensity. After the first stage, the small regioin removing algorithin is processed for loss regions in SOFM output mode. We propose a histogram object analysis method which selects speedy recognized regions and a frame based moving detection method by moving real images.

Teacher's self leadership and students' helping behaviors : Focused on high school students of Kyungnam district

김대원, 이재욱 신라대학교 부산학연구센터 2013 부산연구 Vol.11 No.2

본 연구는 사회교환이론에 근거하여 교사들의 셀프리더십이 학생들의 이타주의 행동에 영향을 미치는 중요한 영향 변인이라는 가정 하에 이들 변인간의 관계를 실증적으로 분석하는 데 목적을 둔다. 분석 결과, 교사들의 셀프리더십은 학생들의 이타주의 행동의 중요한 영향변인의 역할을 하는 것으로나타났다. 따라서본연구는학교에서교사의역할이강조되고있는현실에서 학생들의 이타주의 행동을 높이기 위해 교사들의 셀프리더십의 고양이 필요하다는 것을 강조한다는 면에서 의미를 가진다.

Reciprocation of perceived organizational support on organizational citizenship behaviors in local government

김대원, 이재욱 신라대학교 부산학연구센터 2011 부산연구 Vol.9 No.2

조직시민행동(organizational citizenship behaviors)은 조직이 효과적으로 기능하는데 필요한 구성원의 자발적 조직행동으로서 조직의 공식적 보상체계에 의해 직접적 또는 명시적으로 인정되지 않지만 전체 조직의 효과적 운영을 촉진하는 역할을 의미한다. 이러한 행동은 조직에 의해 개인이 공식적으로 수행해야 할 업무와 관련된 행동은 아니지만, 조직의 입장에서 보면 조직의 발전을 위해 바람직한 행동들이라고 정의할 수 있다. 그리고 조직 구성원의 조직에 대한 보상 심리적 교환관계에 근거하여 개발된 조직지원인식(perceived organizational support)은 조직이 개인의 기여를 가치있는 것으로 받아들이고, 동시에 구성원에게 관심과 배려를 보이는 정도에 대하여 구성원이 개괄적으로 인지하는 신념이기 때문에 조직시민행동의 중요한 영향 요인으로 평가되고 있다. 본 연구는 지방정부 구성원들의 조직시민행동을 높이기 위해서는 리더의 역할을 포함하는 조직지원에 대한 구성원의 인식이 중요하다고 보고, 이들 변인들간의 인과 경로를 분석하는 데 목적을 둔다. 이를 위해 먼저, 이론적 논의를 통해 분석의 이론적 근거를 제시하고, 변인들간의 영향경로를 분석할 수 있는 인과모형을 작성한다. 그리고 실증분석을 위한 자료를 수집하고 경험적 검증을 한다. 마지막으로 분석 결과에 근거하여 효율적인 조직관리를 위한 시사점을 제시한다.

아몰퍼스 자성박대의 자기센서 응용에 관한 연구

金大柱,林在根,金玄郁,愼鏞鎭 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

In this thesis, we have described about application of amorphous magnetic ribbon of FeCoSiB compound to magnetic sensing device. As the samples of our experiment, we used a near zero-magnetostrictive amorphous magnetic ribbon of (Fe0.06Co0.94)79Si2.1B18.9 composition with its thickness of 26[㎛], its length of 5[㎝] and its width of 2[㎜], which was fabricated by rapidly quenching method. In order to improve the magnetic properties of the samples, we annealed them under magnetic field where the range of the crystallization temperature Tx and the Curie temperature Tc were 300~400[℃]. Then, by measuring them with X-ray diffraction(XRD) and vibrating sample megnetometer(VSM) analysis method. we found Tx≒451[℃] and Tc≒441[℃]. From the hysteresis curve of the finally annealed sample ribbon, we found the Large Bakhausen Jump(LBJ) effect at the reversal magnetization field Hw≒0.5[Oe]. This LBJ effect was also observed at the variation of the magnetic domain in the process of magnetization. Thus, it is proved that the amorphous magnetic ribbon of FeCoSiB compound can be use as a magnetic sensing device.

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.