[논문]선박의 충돌회피시스템에 관한 연구

이승건,윤지현 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-

많은 선박사고 유형증 하나인 선박의 충돌은 운항자의 조선실수가 그 원인의 큰 비중을 차지한다. 이는 점차 대형화,고속화되는 선박의 충돌회피를 단지 인간의 시각, 지각능력에만 의존하면서 나타나는 현상이라 할 수 있으며 이에 대비 하기위해 나날이 발전하는 첨단기술을 바탕으로 충돌회피에 관한 자동회피제어시스템의 개발의 필요성이 점차 대두되고 있다. 그러한 취지에서 본 연구도 충돌회피를 위한 자동제어에 관하여 연구되었다. 본 연구는 MMG 수학모텔에 기반을 두어,surge-sway-yaw-roll 운동방정식을 사용하였고, 충돌위험도 설정을 위하여 퍼지이론을 사용하였다.

[논문]Pleasure Boat( 레저선박)의 안전 및 대책현황

이승건,정재훈 釜山大學校生産技術硏究所 2008 生産技術硏究所論文集 Vol.67 No.-

최근 국민소득이 증가함에 따라 플레져 보트의 보급이 활성화되면서 안전사고 방지에 대한 실용적인 안전대책이 요구되어져 왔다. 또한 해마다 크고 작은 플레져 보트의 사고사례가 빈번히 발생하고 있음으로서,본 기술동향 보고에서는 우선 플레져 보트에 대한 국내 보급현황 및 운용실태 분석을 수행하고 운항안전 및 인명안전 측면에서 구체적이며 실용적인 대책 방안에 대하여 살펴보았다. 그리고 플레져 보트에 대한 종류와 정의를 이해하고 국내 해양사고사례를 조사하여 국내외 문헌조사 등을 이용한 플레져 보트의 안전과 대책현황에 관해 소개하고자 하였다.

[논문]최근 5년간 선박의 해양사고 심층분석

이승건 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-

최근 5 년간 선박의 해양사고 심층분석

다중 연료 분사식 SI 기관의 흡ㆍ배기 계통의 해석

윤건식,신흥한,우석근 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-

In this study, the calculation of the behavior of gas in the intake and exhaust system of the multi-point injection SI engine has been accomplished under various operating conditions. The generalized method of characteristics including friction, heat transfer, area change and entropy gradients was used to analyze the pipe flow. The simulation models were selected not to depend much on the empirical constants. The constant-pressure model and the constant-volume model were compared to analyze the gas behavior in the plenum chamber in intake system. Through the comparison of predicted results with experiments, the simulation program was verified by showing good prediction of the behavior of IC engine qualitatively and quantitatively over the wide range of operating conditions.

지방정부 행정서비스에 대한 주관적 평가 : 영천시를 중심으로 The Case of Yeong-cheon City

송건섭,이승철,유영애,이소영 大邱大學校 社會科學硏究所 2003 社會科學硏究 Vol.11 No.1

이 글은 지방정부의 민원행정서비스 만족도를 평가하고, 개선방안을 제시하는데 목적을 두었다. 연구는 경북 영천시를 대상으로 설문조사를 실시하여 분석하였다. 분석결과, 첫째, 민원행정서비스는 친절하고 신속하게 이루어졌지만, 과거 획일적이고 공급자 위주의 행정을 탈피하여 수요자 중심의 행정을 전개하기 위해 서비스 차별화 전략이 필요하다. 둘째, 민원행정서비스에 대한 만족도는 전체적으로 매우 높은 것으로 나타났다. 특히 민원사항에 대한 충분한 설명과 지식, 정보제공, 민원인을 대상으로 한 간단한 문서교육 등이 필요하다. 셋째, 민원시책에 대해서는 만족도가 낮았다. 이를 제고하기 위해서는 전체주민을 고려한 행사, 다양한 방법 (각종매체, 모임)을 통한 홍보활동전개, 특정한 날을 정하기보다는 상시적인 행사, 시의 편리한 시간에 행사 일을 맞추기보다는 주민의 시간을 고려한 행정 등이 필요하다. 마지막으로 민원행정서비스에 대한 개선책으로 각종 법규정비의 간소화가 중요하다. 또 복합민원만을 one-Stop, non-stop으로 처리할 수 있는 별도의 민원 부서가 필요하다. This paper propose to evaluate satistaction and policy orientation of civi1 service in Local government. Its analyze through questionnaire method in case of Yeong-cheon city, Gyeongbuk. The results of this study are as follows: First, civil service enforce friendly and speed, but its need defficiental strategy of civil service to deployment custommer-oriented administration deviate from fixed supply-oriented administration of the past. Second, the satisfaction of civil service totally high. Especially, its need explanation and knowledge sufficiently for civil service, furnishment of information, document education for citizen etc. Third, the satisfaction of civil program somewhat low. In order to the rise service program satisfaction, local government should open citizens’ events, public relation through mass media, civil conference, simplicity of law etc.

치성감염에 의해 발생된 후측인두부 및 종격동 농양

이승호,정종철,김건중,정주성,유선열,박문성,김창룡 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4

Odontogenic infections are usually locally confined, self-limiting processes. However, under certain circumstances, they may break through the bony, muscular, and mucosal barriers and spread into contiguous fascial spaces or planes far from the initial site of involvement, resulting in severn life-threatening complications, such as retropharyngeal spread, suppurative mediastinal extension, airway obstruction, pleuropulmonary suppuration, and hematogenous dissemination to distant organs. The mortality arte for mediastinitis from odontogenic infection ranges from 40% to 60%. Therefore rapid evalution and treatment is essential with a combination of life support, antibiotic therapy, and surgical intervention. Recently, we experienced three cases of retropharyngeal and mediastinal abscesses secondary to odonogenic infections. In all patients, early diagnosis was possible by CT scanning and physical examination. The prognosis was good in all patients by using urgent aggressive surgical and antibiotic therapy.

Apatite-Wollastonite Glass-Ceramics 材料開發 및 치면열구전색재로의 이용을 위한 동물실험 연구

金龍成,申承澈,金豪健,申建澈,小久保正 단국대학교 치의학연구소 1991 논문집 Vol.3 No.-

The authors has experimented with Apatite - Wollastonite - Glass -Ceramic of MgO-CaO-SiO_2-P_2O_5-CaF_2 as biomaterials in order to find out the possibility for use of pit & fissure sealants. 2-rabbits would be selected with insertion of AWGC powder at lower anterior teeth after flap operation. X-ray taking has been done after 2 weeks and 4 weeks breedings. Extracted tooth had been used as samples for SEM observation after sacrificing every 2 weeks. Every samples had been observed at material portion as well as tooth. Such components as Si, Ca and P had been checked by use of EDX and compared the periodic changing data. The obtained results are as follows; 1. Apatite - Wollastonite glass ceramics were prepared with the component of MgO-CaO-SiO_2-P_2O_5-CaF_2 successfully. 2. On intraoral X-ray findings for teeth, A-W materials had been shown the slightly absorption at 2 weeks breeding sample and A-W material had been remove out by attrition otherwise it had been shown the generally radiolucent area as decalcification at 4 weeks breeding sample. 3. On SEM finding for tooth sample after insertion of A-W, the band like intermadiate zone had been found more remarkably at 2nd and 4th week breeding samples, rather than that of the sample which prepared at right after insertion. And this band zone had been fingured diffuse image by gradual. 4. Si and P might be drawn out from A-W material by disolution of A-W through the time, and it was estimated that calcium phosphate as apatite crystal, newly formed biomaterial, would be made of P component from A-W and Ca component from Tooth. 5. It was estimated that A-W material would be more useful at bone than at teeth and adaptable cement should be needed between tooth surface and A-W in case of using for pit & fissure sealant. So more studies for developing the adaptable cement would be needed.

전립선암의 색/출력도플러 경직장초음파검사 : Gleason 점수와의 비교 Correlation with Gleason Score

김효철,김승협,문민환,박병관,김건하,최혁재,윤창진 대한초음파의학회 2002 ULTRASONOGRAPHY Vol.21 No.3

칼만증후군(Kallmann's Syndrome) 1례

김용성,백승훈,유경훈,구기선,형근영,김경년,조정구 圓光大學校 醫科學硏究所 1997 圓光醫科學 Vol.13 No.1-2

Kallmann's syndrome is the most common form of isolated gonadotropin deficiency, characterized by hypogonadotropic hypogonadism due to GnRH deficiency, delayed puberty and smelling difficulty. It occurs sporadic or familial pattern, and the mode of inheritence has not been fully documented. The defect in patient of Kallmann's syndrome occurs at suprapituitary level involving mechanism that regulate GnRH synthesis or release, so this syndrome classified as a secondary hypogonadotropic hypogonadism. The gonadotropin or pulsatile GnRH administration enable successful stimulation of spermatogenesis and fertility. We have experienced 1 patient with Kallmann's syndrome and presented with the review of the literature.

노인틀니 보험급여를 위한 틀니수가 산정법에 관한 조사연구

김용준,신승철,이건수 단국대학교 치과대학 예방치과 1998 예방치과 세미나집 Vol.- No.12

The use of insurance to help spread the financial burden attendant upon geriatric populations in Korea is of a governmental issue. Much of recent issues is the effort to apply this principle to current dental expenses. Therefore, the purpose of this study was to provide a guideline for the national oral health care policy of the insurance payment system for denture service. An opinion survey form was mailed to an approximately 10% of general dental practitioners (1,164) and 260 returned survey responses were analysed. Also, conducted were a telephone interview with 64 general dental practitioners who were willingly participated out of initial contact of 80 practitioners concerning all expenses incurring for the maintenance of dental clinics and personnel. Preexisting informations concerning the dental technician's fee schedule and the cost of materials needed for the construction a denture were also compiled from the Korean Dental Technician's Association and the Korean Association for Dental Materials and Instruments for the actuarial cost to determine the total budget and insurance payment for the denture services of geriatric population in Korea. The results were al follow. 1.A 64.6% of dentists agreed to as a carrier of beneficiary of national denture services for a group of more than 70 years of age. A 73.5% of dental practitioners responded that the selection of the carrier of beneficiary of the responses agree to expand the denture service to all prosthodontic patients. 2. As far as the area of national insurance plans for denture services are concerned, a 93.9% and a 77.5% agreed in the resin-based full dentures only for full denture and in the non-precious metal cast for partial denture respectively. Therefore, the results clearly indicated that both types of denture services need to be included for the national oral health care program. 3. As far as indemnity for the prosthodontic coverage is concerned, the survey results indicated a 693,000 won for resin-based full denture and 708,000 won for non-precious metal cast. Dentists are more favor of a monetary (77.3%) than material (20.4%) reimbursement system. 4. When the actuarial cost for the prosthetic appliance only with the time of services rendered, the materials used and the fee for dental technician were calculated without the consideration of difficulty of the prosthetic services, the cost for resin-based full dentures and non-precious metal cast partial dentures were a 560,484 won and 594,160 won respectively. 5. When the actuarial cost for the prosthetic appliance were calculated with the consideration of difficulty of the services which were based on relative service index of 6,567 won per hour, the basic expenses of service rendered, the current insurance payment schedule and the personnel expense for services by a hygienist, the cost for one resin-based full denture and one non-precious metal cast partial denture were a 589,714 won and 610,296 won respectively.