지르코니아 표면 가공에 따른 상변이

이정수,심정석,정형호,Lee, Jung-Soo,Shim, Jeong-Seok,Jung, Hyung-Ho 대한치과기공학회 2010 대한치과기공학회지 Vol.32 No.2

Purpose : This study aimed to find out the effects of treatments on the surface of Zirconia. Methods : To this end, we selected six treatments that have been used widely: steam cleaning, 2bar & 6bar sand blasting, grinding by green stone point, grinding by diamond bur, and grinding by diamond bur with water spray. Results : The results of our study showed that monoclinic rate increased from all six treatments. Monoclinic rate varied by treatments, ranged from 0.6% (steam cleaning) to 6.5% (6bar sand blasting). These values from all six treatments were below ISO 13356 standard, which is 25%. Also, we found that two treatments (green stone point and diamond bur) increased roughness of surface of Zirconia. Conclusion : This study concluded that phase changes of Zirconia were not significant by using six treatments we employed.

전통민속마을 소방방재 기본구상 - 아산 외암민속마을을 중심으로 -

이정수,이왕기,오규형,신교영,권흥순,Lee, Jeong-Soo,Lee, Wang-Kee,Oh, Kyu-Hyung,Shin, Kyo-Young,Kwon, Heung-Soon 한국건축역사학회 2010 건축역사연구 Vol.19 No.1

This research has set up the fire protection and early suppression plan for Asan Oeam folk village which is composed of traditional wooden building instinct or complex. The results of this study are as follows. 1. The traditional wooden buildings require attentive considerations about the fire property of the Waga and the straw roofed house. Especially, as the straw roofed house has property that the transfer and development of the fire is fast. Therefore we studied on the transferring possibilities of the fire dangerous instinct through measuring the distance from of the eaves edge and trees in neighboring house. 2. This research proposes the tools for the priority protective building through consideration of fire risk and cultural priority because the fire prevention for all is impossible at the same time. 3. The most important thing is preserve the cultural identities of traditional folk village in establishing the fire hydrant and fire prevention facilities. Traditional folk village landscape should be considered.

행위이론을 적용한 도서관 이용자 컨텍스트 정보의 CAbAT 모델링

이정수,남영준,Lee, Jeong-Soo,Nam, Young-Joon 한국도서관정보학회 2012 한국도서관정보학회지 Vol.43 No.1

도서관 이용자의 복잡한 환경과 이용패턴에 따라 생성된 정보는 지식구조화를 통해 이용자에게 적합한 상황인지 정보서비스에 활용된다. 따라서, 도서관 이용자의 다양한 컨텍스트를 정의하고 상호 관련된 컨텍스트의 지식구조화를 위한 컨텍스트 모델 구축이 필수적인 요건이다. 본 연구에서는 컨텍스트의 개념 및 컨텍스트 모델링을 고찰하고, Engestrom의 행위이론의 개념을 활용하여 도서관 이용자의 행위 모델을 1) 주체, 2) 목적, 3) 도구, 4) 노동단위, 5) 커뮤니티, 그리고 6) 규칙으로 설계하였다. 또한, 도서관 이용자의 컨텍스트를 분석하기 위하여 행위정보를 수집하여 그들의 행태를 관찰 및 기록하는 사용자 추적법 (Shadow Tracking)을 활용하였고 수집된 행위정보는 CAbAT(Context Analysis based on Activity Theory)의 방법론을 활용하여 도서관 이용자의 컨텍스트를 설계하였다. The information that has been created according to the complex environment and usage pattern of library user can provide context-aware information service through knowledge structuralization on whether it is a suitable situation for user. Accordingly, the development of a context model for defining the various contexts of library user and for the structuralization of interrelated context information is an essential requirement. This study examined the context concept and context modeling, and utilizing the concept of Activity Theory by Engestrom, the activity model of library user was designed as 1) subject, 2) object, 3) tools, 4) divison of labor, 5) community, and 6) rules. In addition, for the purpose of analyzing the context of library user, activity information was tracked to utilize the Shadow Tracking for observing and recording their forms, and the methodology of CAbAT (Context Analysis based on Activity Theory) was utilized for the collected activity information to analyze the user context model.

고충아파트 필로티 디자인 특성 분석에 관한 연구

이정수,송용호,유우상,Lee Jeong-Soo,Song Yong-Ho,Yoo Uoo-Sang 한국주거학회 2005 한국주거학회 논문집 Vol.16 No.6

This study investigates the design features of pilotis applied to 20 high-rise apartment housings in Korea, completed between January 2000 and August 2005. It analyzes the design characteristics of pilotis on the basis of its spatial configuration and the residents' behavior and suggests the directions of pilotis design in the future. The study finds the followings. 1) The pilotis spaces in foreign apartment housings are used mainly for communal functions such as the passages between buildings for both pedestrians and vehicles. Compared with this public use of pilotis in foreign counterparts, the pilotis spaces in Korean apartment housings are semi-private and have multiple purposes. 2) The pilotis design can be classified on the basis of the spatial configuration elements and the patterns of residents' behavior. The spatial configuration elements consist of ceiling, column, wall, and floor; the residents' behavior can be classified as viewing, resting and playing, driving and parking, and keeping privately-owned objects such as motorcycle and bicycle. 3) Two spatial configuration elements, the wall and the ceiling and two behavioral patterns, 'resting and playing' and 'viewing' are getting more attention by designers in the apartment housings analyzed in this study.

EGW 용접재료 및 용접부 특성에 관한 연구

이정수,윤진오,정상훈,박철규,안영호,Lee, Jeong-Soo,Yun, Jin-Oh,Jeong, Sang-Hoon,Park, Chul-Gyu,An, Young-Ho 대한용접접합학회 2010 대한용접·접합학회지 Vol.28 No.2

In this study, newly developed welding consumables for EGW were welded in EH 36 TM steel plates and their welded joints were evaluated in point of mechanical properties and microstructures compared with imported consumables. Newly developed welding consumables were evaluated as good arc stability and slag fluidity, substantially the same with imported products. The tensile strength of all welded joints were sufficient to meet the requirements specified in a ship’s classification(490~640MPa) and all areas of fracture were heat affected zone(HAZ). Charpy absorbed energy values of all EG welded metals were sufficient to meet the requirements of classification(min. 34J) and those of newly developed wires were evaluated to be better than those of imported wires. As a result observing microstructures of single and tandem EG welded metals through optical and scanning electron microscope (OM&SEM), no grain boundary ferrite(PF(G)) were created in a prior austenite grain boundary and a volume fraction of a fine acicular ferrite were observed very high.

포장과 저장온도가 '백다다기' 오이 선도에 미치는 영향

이정수,김기빈,김하연,정다혜,최다경,채예림,박미희,장민선,홍윤표,Lee, Jung-Soo,Kim, Gibin,Kim, Hayeon,Jeong, DaHye,Chei, Da Kyoung,Chea, Ye Rim,Park, Me Hea,Jang, Min Sun,Hong, Yuun Pyo 한국포장학회 2021 한국포장학회지 Vol.27 No.2

The evaluation of package temperature for fresh preservation of cucumber was investigated. The fresh cucumber is available in markets of Korea during whole seasons, for the help of farmer, distributor and consumer. Cucumbers were stored within cardboard boxes packaging covered with low density polyethylene (LDPE) at different temperatures (5, 10, 15 and 20℃). Changes in weight loss, hue angle, firmness, moisture content and general appearance (shape of cucumber) were investigated during storage of cucumbers. General appearance index with non-packaging decreased more than with LDPE film packaging at 5℃ and 10℃. During storage of cucumbers, general appearance index as freshness showed packaging effect at low temperature than room temperature. In the fresh weight loss, the packaged cucumbers were less reduced than that of the non-packaging ones. At color change, Hue angle of cucumber stored within low temperature with film packaging decreased gradually during storage. However remarkable change in hue angle were observed in cucumber within LDPE film packaging treatments of 15℃ and 20℃ storage. The effect of hue angle with packaging appears differently depending on the storage temperature conditions. The firmness and moisture content of cucumber flesh were not affected by packaging and storage temperature. In this experiment, cucumbers packaged with LDPE film at 5℃ and 10℃ were the most desirable for extending the quality. These results suggest that packaging of low temperature treatments in combination could be effective in prolonging the shelf life of cucumber.

고온기의 결구상추 저장 및 포장 방법에 따른 선도 비교

이정수(Jung-Soo Lee),김지강(Ji-Gang Kim),배영석(Yeoung-Seuk Bae),박미희(Me Hea Park),최현진(Hyun-Jin Choi),최지원(Ji Won Choi),최동수(Dong Soo Choi),박수형(Suhyung Park),정재영(Jaeyoung Jeong),정금향(Gumhang Jung),박도이(Do-E Park) 한국원예학회 2015 한국원예학회 학술발표요지 Vol.2015 No.10

보안 카메라 시스템의 저조도 영역에 대한 영상 개선

이정수(Jeong-Soo Lee),정회인(Hweihn Chung),김효주(Hyo-Ju Kim) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6

국내 특·광역시 경관, 도시디자인 및 공공디자인 정책 비교 연구

이정수(Lee, Jeong-Soo),윤성훈(Yun, Sung-Hun),한정(Han, Jeong) 한국도시설계학회 2011 도시설계 : 한국도시설계학회지 Vol.12 No.2

본 연구는 경관, 도시디자인 및 공공디자인 등으로 시행되고 있는 국내 특?광역시의 관련 정책들을 비교·분석하여, 정책적 시사점을 도출하는 것을 목적으로 하고 있다. 이를 위하여 국내 특?광역시 도시디자인 관련 조직, 예산, 계획 및 사업, 그리고 위원회 및 심의자문대상 등을 방문인터뷰, 사례현장조사 등을 실시하였다. 이상의 연구결과 다음과 같은 결론을 얻었다. 첫째, 국내 특·광역시 도시디자인관련 운영조직을 살펴보면, 본청 각 부서 및 사업소, 구청, 산하기관 등의 경관, 도시디자인 및 공공디자인 업무를 관리하기 위하여 단체장의 의지에 따라 위상이 다른 도시디자인 총괄본부와 추진단, 도시디자인과를 두고 있다. 둘째, 국내 특·광역시마다 도시디자인에 대한 개념적 범위 정의에 따라 관련조례 운영의 차이를 보이고 있다. 셋째, 도시디자인 관련 조직 예산, 사업 및 심의대상 등은 도시디자인 정책에 따라 편차를 보이고 있는데, 소프트웨어적인 도시디자인 기획 및 계획에 그치는 사례로부터 직접 사업을 시행하는 등 도시마다 사업의 기획으로 시행방법의 차이가 있음을 알 수 있다. 결론적으로, 도시 및 공공디자인에 관한 법·제도적 기반구축을 통하여 각 특·광역시마다 다르게 해석되어 적용되고 있는 경관법에 의한 경관계획과 전략계획으로서 도시디자인, 공공디자인의 개념 재정립이 요청된다. The purposes of this study are to find the differences and characteristic of Public Design, Urban Design and Landscape of metropolitan cities in Korea. For the purposes, we have interviewed the officers of urban design divisions and surveyed several representative urban design examples in metropolitan cities. The results are as follows : First, the hierarchical position of urban design divisions are different from vice-mayor to section chief according to the strategic goal in city management of mayor. Second, the definition and scopes of urban design are different from space design to facility design, and results the ordinances and the composition of committee. Third, the scopes of budget and projects are depend on the definition and scopes of urban design, and The conclusion calls for reviews of current townscape design and urban design of institutional framework is needed as well as reestablishment of comprehensive positioning of urban design at the city marketing level.

통신비밀보호와 국민의 알권리

李廷洙(Lee Jeong-Soo) 한국법학원 2005 저스티스 Vol.- No.88