디젤엔진 발전기 세트의 저소음화에 관한 연구

주현돈,양승호 진주여자전문대학 2002 論文集 Vol.25 No.-

Diesel engine generator sets in heavy industry plants and residential/official buildings can cause serious noise problem. In this paper, a low noise diesel engine generator set is developed through constructing an acoustic enclosure with ventilation duct silencers that effectively block the acoustic flow but guarantee good thermal flow. Acoustic design of the enclosure which is initially layout by rule of thumb, is evolved systematically through numerical reanalysis procedure, based on indirect boundary element method(IBEM) with a commercial acoustic analysis code. The acoustic and cooling performances of the developed low noise diesel engine generator set are confirmed by the experiment.

경계요소법과 유한요소법에 의한 흡음판을 가진 구조물의 소음해석

주현돈,양승호 진주여자전문대학 2001 論文集 Vol.24 No.-

In many practical problems, the use of finite elements to discretize the fluid region leads to large stiffness and mass matrices. But, since the acoustic boundary element discretization requires to put elements only on the surface of structure, the size of matrices is reduced considerably. Here, we developed a numerical analysis program for the structural-acoustic coupling problems of the multi-region cavity, using boundary elements for the fluid regions and finite elements for the structure. By considering sound transmission through layered systems placed in a cavity, the accuracy of the coupled acoustical-structural finite element model has been verified by comparing its transmission loss predictions with analytical sloutions. Example problems are included to investigate the characteristics of the multi-region structural-acoustic coupling system with porous material.

Thiamine결핍 유도후 쥐 전뇌의 성상교세포 Glial Fibrillary Acidic Protein(GFAP) 면역화학 활성도에 대한 변화

김승현,김희태,김주한,김명호,황세진,김명권,백태경 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

퇴행성 요추질환에 대한 편측성 후방 추체간 유합술(1개의 cage를 이용한) 및 척추경 나사못 고정술

신호,김석원,이승명,주창일 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.3

Objective: The puspose of this study was to determine the efficacy of unilateral posterior lumbar interbody fusion (Hemi-PLIF) by using one cage for the patients with focal type of degenerative lumbar diseases. Materials and Methods: The authors reviewed clinical and radiologic data of 43 patients with focal type of degenerative lumbar diseases who were performed unilateral Hemi-PLIF during the period between November 2000 and June 2003. The operation procedure was unilateral hemi-PLIF using titanium cages with transpedicular screw fixation. Results: The mean follow-up period was 11.2 months. The mean operation time was 197 minutes and the average estimated blood loss was 285mL. The clinical success rate according to Prolo's scale was achieved in 89.3%. of patients and the solid bony fusion was occurred in 96.4%. There were 2 patients of postoperative complications such as superficial infection and screw malposition. Conclusion: This procedure has been found to be an effective and safe procedure with rare complication. To compared with bilateral PLIF, less operation time, less blood loss, more fusion rate is noted.

火災時 非常發電機 稼動에 관한 硏究

朱賢暾,梁承浩 진주여자전문대학 1996 論文集 Vol.19 No.-

Recently it has become particularly to be concerned with low noise emergency generator because generator sets caused noise affecting seriously people in buildings. In this study, I investigated the working of the low noise emergency generator at fire eruption, relation with fire equipment, and changing time from electric power to emergency power. I simultaneously estimated the changing time from electric power to emergency power at emergency.

간질환자의 간질 관련 외상

오동호,박운규,이영주,김희태,김승현,김주한,김명호,신동진 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

척수 경막외 혈관 기형에 의한 재발성 척수병증

오동호,김희태,박운규,이영주,김승현,김주한,김명호,박문향 대한신경과학회 1998 대한신경과학회지 Vol.16 No.5

당뇨병성 말초신경병의 평가에 대한 전류감지검사의 임상적 유용성

김승현,심충섭,김주한,김명호 대한신경과학회 1998 대한신경과학회지 Vol.16 No.5

와동 세척제가 상아질 결합제의 결합에 미치는 영향

송승호,박호원,,이주현 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.4

와동 형성시 박테리아에 감염된 상아질이나 법랑질을 완전히 제거하지 않는 것은 수복학적 측면에서 볼 때 잠재적 문제점이 된다. 수복물 하방에서의 박테리아의 활동에 의해 술후 과민반응, 치수의 염증, 이차 우식 등이 진행될 수 있다. 와동 세척제는 와동 형성 후 잔존 박테리아의 제거를 위해 효과적으로 사용될 수 있지만 상아세관에 잔유물을 남겨 상아질 결합제와 치질간의 긴밀한 결합을 방해하여 미세누출을 증가시키고 결합강도를 약화시킬 가능성이 있다. 본 연구는 2% 클로르헥시딘을 함유하는 와동 세척제인 Consepsis(Ultradent. USA)가 Adper Scotchbond MultiPurpose(3M ESPE, USA), Adper Single Bond(3M ESPE, USA), Adper prompt L-Pop (3M ESPE, USA)의 결합에 미치는 영향을 평가하기 위하여 발거된 제 3대구치 120개를 이용하여 Consepsis 와동 세척제를 사용한 군과 사용하지 않은 군으로 나누어 전단결합강도 측정과 수복물 변연에 나타나는 미세누출 정도를 색소 침투 평가 방법으로 분석함으로써 다음과 같은 결론을 얻었다. 1.Comsepsis 와동 세척제의 사용 유무는 Adper Scotchbond Multi-Purpose, Adper, Single Bond, Adper Prompt L-Pop 의 미세누출 양상에 있어 통계학적으로 유의한 차이를 보이지 않았다.(p>0.05). Incomplete removal of bacteria contaminated dentin or enamel associated with caries is a potential problem in restorative dentistry. Secondary or residual caries, pulpal inflammation and hypersensitivity may result from bacteria left after the initial preparation, especially if an adequate seal against microleakage is not obtained. A possible solution to eliminate residual bacteria left in a cavity preparation would be to treat the cavity with cavity disinfectant wash. But a potential problem with using a cavity disinfectant with dentin bonding agents could be their interference with the ability of the resin to bond to the tooth micromechanically. The purpose of this study was to ecaluate the effect of 2% chlorhexidine containing cavity disinfectant(consepsis) on shear bond strength and microleakage of dentin bonding agents, Adper Scotchbond MultiPurpose. Adper Single Bond and Adper Prompt L-Pop. Sixty and sixty sound human third molar teeth, respectively, were used for shear bond strength and microleakage test. For experimental group, cavity disnfectant was applied before dentin bonding agents, and was not applied for the control group. The result from the this study can be summarized as follows; 1. Use of 2% chlorhexidine containing cavity disinfectant(Consepsis) does not significantly affect the shear bond strength of dentin bonding agents. 2. Use of 2% chlorhexidine containing cavity disinfectant(Consepsis) dese significantly affect the microleakage of dentin bonding agents.

국가직업능력표준 실용화를 위한 제도화 방안

나승일,김주섭,김주일,정연앙,구자길,김강호,문세연 한국농업교육학회 2007 농업교육과 인적자원개발 Vol.39 No.1

이 연구의 목적은 일-교육훈련-자격이 연계될 수 있도록 노동부의 국가직업능력표준을 국가차원에서 개발·운영·관리될 수 있는 제도화 방안을 마련하는데 있었다. 연구목적 달성을 위해 문헌고찰 및 내용분석, 포커스그룹인터뷰를 실시하였고, 연구결과의 타당성 확보를 위해 전문가협의회 및 공청회를 실시하였다. 국가직업능력표준 제도화는 표준의 실용화를 제고할 수 있도록 관련용어 정의, 총괄기구, 표준개발 및 승인, 표준 활용에 관한 인프라 구축에 필요한 사항이 규정되도록 관계 법령을 정비하는 것이다. 표준 제도화를 위해 다음과 같은 사항이 관계 법령에 명시되도록 해야 한다. ① 표준 제도화를 위해 직업, 직업능력, 직무, 표준 등을 관련법에 정의해야 한다. ② 국가직업능력표준 관련 부처 및 다양한 이해당사자의 참여를 기반으로 한 국가직업능력표준 사업 전담 조직을 설치하고, 표준사업에 대한 자문과 심의를 담당할 수 있는 위원회를 구축한다. ③ 다양한 산업분야 단체가 표준개발의 주체가 될 수 있도록 지원하고, 표준의 수준 설정을 통해 직종 내 수직적 경력개발을 촉진하며, 개발된 표준에 대한 지속적인 관리와 현장적합성을 승인하는 체제를 구축해야 한다. ④ 국가직업능력표준은 산업현장에서는 인력을 채용하고 관리하는 기준으로, 교육훈련에서는 교육과정을 개발하고 교과목 및 교재를 개발하며 현 교육과정을 평가하는 기준으로, 자격체계와는 표준의 자격화, 새로운 자격설계, 자격의 출제기준으로 활용될 수 있도록 지원해야 한다. 이를 위해 국가기술자격법, 근로자직업능력개발법, 산업인력공단법 등 관계 법령을 개정하거나 국가직업능력표준에 관한 특별법을 제정할 필요가 있다. 한편, 국가직업능력표준 제도화 단계에 따른 구체적인 추진과제와 이를 실현하기 위한 정책적 제언을 제시하였다. The purpose of this study was to develop the institutionalization that NOS(National Occupational Standard) was developed, operated and managed for linking with work, training and qualification. To achieve the purpose, literature reviews, contents analysis and focus group interview were conducted, and experts council and a public hearing were executed. The institutionalization is the legislation consolidation to regulate details related infra construction as follows for improving utilization of NOS. ① It should be defined occupation, occupational competency, job, standards and so forth on the related laws. ② A organization which take exclusive charge with and a council which consult and deliberate on NOS projects should be established through the cooperation between stakeholder and government organization. ③ It should be supported that various industrial parties including SHRDC are the main body for development of NOS, promoted vertical career development by occupation through establishing level of NOS, and established system that manage continually and approve practical application of NOS. ④ It should be supported that NOS is used as a criterion for recruiting and managing workforce, a criterion for developing and evaluating curriculum and educational materials in training, having qualification for itself, designing for new qualification, and a criterion for setting questions for a qualifying examination. To improve utilization of NOS, It need to be consolidated the related laws including National Technical Qualifications Act and Workers' Vocational Competency Development Act or to be enacted a special law on NOS. Moreover, this study suggested action plan according to the stages of institutionalization, and political proposal for effective actualization of action plan.