Poly(ρ-phenylenesulfide)와 Poly(ρ-phenylene)으로부터 제조된 탄소의 리튬 이온 2차전지 anode 재료로서의 전기화학적 특성

유덕영,이주성,박수길,변지형,류신환,정윤이 한양대학교 에너지·환경기술연구소 1998 에너지·環境技術論文集 Vol.4 No.-

Poly(p-phenylenesulfide)와 poly(p-phenylene)으로부터 제조된 탄소를 리튬이온 2차전지용 음극재료로 사용하여 전기화학적특성을 연구하였다. 이들 고분자들을 질소 분위기하에서 승온속도 2℃/min로 1000℃까지 상승시킨 후, 1시간 동안 탄화시켜 탄소를 제조하였다. Poly(p-phenylene)으로부터 제조된 탄소가 보다 더 규칙적인 구조를 가지기 때문에 Poly(p-phenylenesulfide)으로부터 제조된 탄소보다 더 많은 용량과 충방전 효율을 나타내었다. 수산화리튬과 염화주석(Ⅱ)을 첨가하여 용량의 증가와 충방전 효율의 증가를 가져올 수 있었다. 이중에서 poly(p-phenylene)에 염화주석(Ⅱ)을 첨가시켜 제조된 탄소가 가장 큰 충방전 용량과 충방전 효율의 향상을 가져왔다. Carbon inaterials manufactured from poly(p-phenylene sulfide) and poly(p-phenylene), were studied on electrochemical characteristics as anode materials for lithium ion secondary battery. These polymer precursors were heat treated for 1hr at 1000℃ with the rate 2℃/min under nitrogen atmosphere. Carbon manufactured from poly(p-phenylene) showed higher capacity and coulomb efficiency of charge/discharge than carbon from poly(p-phenylene sulfide) because the former has better ordered structure. Carbon manufactured from polymer precursors adding stannous chloride or lithium hydroxide showed higher capacity and better efficiency of charge/discharge. Also, carbon manufactured by adding stannous chloride to poly(p-phenylene) showed the highest capacity and efficiency of charge/discharge.

농촌 Amenity 자원 활성화를 위한 조직리더 육성 방안

유덕기,이상영 동국대학교 사회과학연구원 2007 사회과학연구 Vol.14 No.1

마을발전을 위한 정책적 사업 개발은 필수적이다. 그러나 이를 추진하고 주민의 적극적인 참여와 자발적인 발전계획을 수립하고 운영할 수 있는 마을조직정비와 조직리더의 역할은 무엇보다 중요하다. 지역의 특성을 바탕으로 지역 내 산업간 유기적 관련성을 높이며 지역자원의 잠재력을 활성화하고 자원의 최대한 이용을 전제로 한 지역농업으로의 지방자치제의 기능강화와 자율성의 강화에 의한 성공적인 추진사례도 등장하고 있으나 대부분 조직과 리더의 미약으로 효과적인 추진이 어려운 실정이다. 1980년대 중반 이후 이농 및 농촌고령화로 인한 조직파괴와 리더의 감소는 심각한 현상이라고 하겠다. 이러한 농업 농촌의 현실에서 농업, 농촌발전의 핵심적 역할을 담당하는 것으로 그 중요성이 부각되고 있는 지역단위의 마을을 중심으로 잠재된 농촌의 어메니티(amenity)자원을 활성화하고 마을단위의 환경친화적 특화농업을 통하여 지역경쟁력을 강화하고 농가소득향상을 추구하며 그린투어와 연계된 농촌체험마을을 육성, 활성화하기 위하여 제기되고 있는 정책과 필수적으로 요구되고 있는 주민조직의 활성화와 조직리더 육성방안을 강구하고 기초지방자치단체(시/군/읍/면/마을)단위 중심의 지역농업 개발사업(지역농업 클러스터)에도 연계하는 방안을 제시하여 농촌지역과 생명농업발전에 기여하고자 한다. In the development of policies and projects for regional development, consolidating region's organization and organizational leadership that could establish and operate voluntary developmental plans along with active participations by regional people are important. There have been successful cases of regional agricultural products emphasizing regional characteristics by strengthening functions and autonomy of the local government based on the premise of increasing mealable relationship among local industries and maximizing the characteristics of local resources and local resource utilization. However, effective pursuing is difficult due to lack of organization and leadership. Centering around local units with their importance recognized playing the core role in the development of rural areas, other important issues are activating civic organizations essential for local development based on town units and agricultural amenity resources in rural areas by seeking methods of rearing organizational leadership, improving rural incomes by strengthening local competitiveness through environmentally -friendly agricultural products based on local units, and developing and activating farm experience related with green tour. The types of organization and leaders are analyzed by investigating approved cases of farm experience. According to the results of the analysis, we seek the methods of promoting organizations and leaders for promoting farm experiences in villages and methods of constructing support organizations for promoting farm experience centering around local government units (such as city, Kun, Eup, Myun and village).

포항지역 이암풍화토의 전단특성에 관한 연구

김영수,유철호,문홍득 경북대학교 산업기술연구소 1996 産業技術硏究誌 Vol.24 No.-

A series of civil constructions and development near Pohang provinces have been activated recently. but the behaviour of weathered mudstone soils, consisting of most part pohang region have shown very different shear behaviour. And it has caused a lot of problems in constructing civil structures. Therefore It can be emphasized that we noticed the characteristic shear behaviour of weathered mudstone soils. Study of this soils is less reaserched comparing with the other soils. In this study, For the purpose of more careful and exact definitions of weathered mudstone soils even though the experiment was conducted only remoulded soil specimen, we applied constitutive equations to predict the shear strength of weathered mudstone soils. The constitutive equations being used in this study are the Cam-clay model and the Single-Hardening Stress-Strain model from Dr. Lade. The range of experiment have been restricted only Undrained shear strength, and we controlled the method of consolidation After all experiment, we have evaluated which constitutive equation was suitable for the weathered mudstone soils, and have tried to find out the shear characteristic of weathered mudstone soils around Pohang province.

위암환자의 생존율에 관한 역학적 조사연구

김덕성,이태용,이영수,류기하 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

To find out the survival rates of stomach cancer patients, the author studied 288 stomach cancer patients who took operation at the Department of Surgery in Chungnam National University Hospital from January 1, 1985 to December 31, 1991. The results were as follows: 1. Of the total patients, 67.4% were male: but 32.6% were female. 2. 64.6% of patients lived in rural area and 35.4% urban;98.3% of those were married; 30.6% were farmers and 17.4% were commercial workers; 54.5% were smokers; 48.3% were alcohol drinkers. 3. By types of gastric cancer, 84.4% were progressive gastric cancer patients. Among these, type 2 patients were more than other type patients. 61.5% of those had metastasis to lymph node. 55.2% of those took operation by RSG with gastrojejunostomy; 97.6% of those knew that they had cancer; 19.1% of those had a family history that at least one of family members had cancer. 4. The gross 5 year survival rate of total patients was 47.2%. 5. The 5 year survival rate of male patients was 41.6% but that of female was 46.3%. The 5 year survival rates by residential area, chemotherapy, marital status, blood type, family history, smoking, and drinking were not significantly different. 6. The 5 year survival rate of type 2 progressive gastric cancer patients was the highest with the rate of 72.0%. Metastasis to lymph node and type of operation showed statistically significant difference in 5 year survival rates.

교정용 고무 링의 삽입과 임시 전장관의 수정을 통한 보철 수복 전 인접면 공간 획득: 증례보고

신한얼,노병덕,신유석,이찬영 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Proximal caries or coronal defect in posterior teeth may result in the loss of proximal space and drifting of neighboring teeth, which makes restoration difficult. Inability to restore proper contours and to align tooth axis properly are commonly encountered problems when planning tooth restoration. Moreover, tilted teeth aggravate periodontal tissue breakdown, such as pseudo-pocket, and angular osseous defect. The purpose of this case presentation is to describe a simple technique for inducing minor tooth movement with orthodontic separating ring and provisional restoration modification. This method was used to create crown placement space on mesially tilted molar. This method is easy, simple and efficient technique which could be used in interproximal space gaining in selected situation.

시스템 다이내믹스를 이용한 간호단위별 간호인력 산정에 관한 연구

김문실,성영희,권경자,김도형,김정아,신덕신,유인자,유재국,이현숙 병원간호사회 2006 임상간호연구 Vol.11 No.2

Purpose: The purpose of the study was to forecast manpower by building the nursing manpower-staffing model(surgical-medical nursing unite). Method: The system dynamics approach was adapted to build a simulation model for calculating medical-surgical nursing manpower-staffing. The model was built up on Venism 5.0b DSS. Result: The results in the basic circumstance are in following. The level of nursing service quality, patientsatisfaction, and nurse job satisfaction maintains higher at medical-surgical nursing unit of the tertiary hospitals with the ratio of bed to nurse 2.5:1-3.0:1 than at any other situations. The level of nursing service quality, patient satisfaction, and nurse job satisfaction maintains higher at madical nursing unit of the secontary hospotals with the ratio of bed to nurse 3.0:1 and at surgical nursing unit of the secondary hospitals with the ratio of bed to nurse 3.0:1-3.5:1 than at any other situations in the fundamental from. The results in the simulation circumstance are in following, As author raises the operating rate of bed into 95-100%, and cut skilled nursing staff down, the level of nursing-service quality, patient satisfaction, and nurse job satisfaction drops slightly. Conclusion: In terms of economic efficiency on tertiary hospotals, the ratio of bed to nurse for the best reasonable medical-surgical nursing manpower-staffing is 3.0:1. In terms of economic efficiency on secondary hospitals, the ratio of bed to nurse for the best reasonable medical nursing manpower-staffing is 3.0:1 and surgical nursing manpower-staffing is 3.5:1

리튬 이온 2차전지용 Anode 재료의 제조와 그 특성 고찰

이주성,정윤이,변지형,박은성,유덕영 한양대학교 에너지·환경기술연구소 1997 에너지·環境技術論文集 Vol.3 No.-

Carbon materials, disordered carbon and KS6(graphite, Lonza), were studied as anode materials of lithium ion secondary battery. The disordered carbons were made from thermosetting resins (phenol resin, furan resin, acetylene resin and its mixed resin). The resins were carbonized in nitrogen gas at 1000℃. When the thermosetting resins were carbonized, an addition of lithium hydroxide improved capacity and cycle life, but decreased the efficiency of the first charge/discharge. Also, in this study, the capacity of the carbon from phenol resin was higher than that of the carbon from acetylene resin or furan resin. But, the carbon from mixed resin was the highest capacity of all the synthetic carbons.

Characterization of Plasma Electrolytic Oxide Formed on AZ91 Mg Alloy in the KMnO₄ Electrolyte

Duck Young Hwang,Bong Young Yoo,Deok Yong Park,Dong Heon Lee,Dong Hyuk Shin 한국표면공학회 2008 한국표면공학회 학술발표회 초록집 Vol.2008 No.-

위평활근종

유영만(Young Mann Yoo),김영덕(Young Duck Kim),김홍용(Hong-Yong Kim),이혁상(Hyucksang Lee),백낙환(Nak Whan Paik) 대한외과학회 1987 Annals of Surgical Treatment and Research Vol.32 No.4

To analyze the characteristics of agricultural accidents, and consider about the preventive measures

Chan Young Yoo,Jeung Ho Kim,Yong Hwan Kim,Hyun Ho Kim,Duck Yeon Cho,Young Shik Park,Jung Sun Park,Shin Jae Yi 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.10

Agriculture has many risk factors to human such as high rate of using pesticides and fertilizers, using agricultural machines frequently, and contacting with animals and plants. Also, such handling heavies, and holding position unnaturally are poor work conditions. The population in agricultures continues to be older. According to Minister of Employment and Labor's 'present status of industrial accident-occurrence', the rate of overall industrial accident was 0.69 in 2010, but the rate of agricultural accident was 1.38 that became twice in its domain. It is a serious problem; however there are still lack of the movement and institutional strategy prepared to prevent from the accidents. Therefore, there need to have the research and investigation, and movement of prevention or institutional strategy to prevent from agricultural accidents. This research is to analyze the characteristics of agricultural accidents, and consider about the preventive measures in recent 5 years of working in agricultures. In conclusion, the author expects that hereafter, the results used for specialized and effective promotion of preventive services.