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치과용 임플란트로 적용을 위한 스테인리스강 표면의 Ti/TiN film 증착
최한철,고영무,백대화,박영록,박지윤 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.1
A study on Ti/TiN film coating on stainless steels for application as dental implants have been investigated. The stainless steels containing Ti were solutionized 1050℃ for 1hr. Then the surface was deposited with Ti and TiN by using electron-beam deposition method. The deposited layer and microstructure were analyzed by using XRD, WDX, XPS and SEM. The hardness and wear resistance of deposited surface were examined and corrosion behavior were investigated by using potentiostat, XPS and SEM. The results were as follows: 1. Some defects showed on the deposited surface, such as crater and microdroplet, and surface roughness increased in all specimen after TiN deposition. 2. Ti/TiN deposited layer showed columnar structure which nucleated and grew on the special crystalline direction and plane: Ti/TiN layer TiN(220) and TiN(200). 3. The hardnesses of Ti/TiN layer was higher than that of TiN layer. 4. In case of stainless steel containing high Ti content, Ti/TiN layer showed better wear resistance than that of TiN layer. 5. Pitting potential of TiN film in NaCl solution increased as Ti content increased, but pitting potential of Ti/TiN film were not affected by the Ti content of substrate. Pitting potential of Ti/TiN film showed high value than that of TiN film in NaCl solution. The number and size of pits were apparently decreased by Ti/TiN film deposition on the stainless steel.
대학 캠퍼스 내 야간 보행 환경에 대한 여대생들의 성범죄 피해 불안감 연구
고지영(Ji yeong Ko),이유미(You Mi Lee) 한국셉테드학회 2013 한국셉테드학회지 Vol.4 No.1
본 연구의 목적은 성범죄 피해가 가장 많은 야간 시간대에 대학 내 보행 환경에서 여대생들의 성범죄 피해 불안감 조사 및 결정 요인 분석을 통해 성범죄로부터 안전한 보행 환경을 제시하는 것이다. 본 연구의 방법은 이론적 고찰로 선행 연구를 분석하고, 실증적 고찰로 서울시에 위치한 두 개의 대학의 현장 조사와 여대생 55명을 대상으로 설문조사를 실시한다. 본 연구의 결론은 첫째, 야간 시간대에 대학 캠퍼스 내에 머무는 여대생이 적은 표본임에도 다수 존재하였다. 이를 인식하여, 캠퍼스 설계 시 활성화된 주간의 캠퍼스 환경만을 고려할 것이 아닌 야간 캠퍼스 환경에 대한 고려도 함께 이루어져야 한다. 둘째, 성범죄 간접 피해 사례는 적은 표본 임에도 발생된 사례가 있었다. 이러한 결과는 앞으로 캠퍼스 내에서의 성범죄와 관련하여 구체적인 연구가 이루어져야 할 것임을 시사하고, 여기서 성범죄가 발생했던 공간으로는 야외보행로, 건물 내 화장실, 강의실 내, 주차장, 과방/동아리방, 출입구 주변 순이었다. 셋째, 성범죄 피해 불안감을 크게 느끼는 공간은 야외보행로, 건물 내 화장실, 건물 출입구 주변이 높은 순위를 보였다. 이러한 공간들은 드문 인적 속에 잠재적 성범죄자들과 접촉할 수 있는 가능성이 높은 공간들로 특히 성범죄로부터 안전한 캠퍼스를 위하여 고려된 계획이 필요하다. 넷째, 성범죄 피해 불안감을 느끼는 이유로는 드문 인적이 가장 큰 수치로 집계되었고, 뒤이어 어두운 조명, 사각지대, 건물의 노후화 순이었다. 다섯째, 성범죄로부터 안전한 야간보행환경을 위해 개선되어야 할 부분으로는 사람들의 이용 빈도가 낮은 공간을 활성화하여 이용자를 증대시키는 것이 가장 필요하며, 다음으로 야외보행로의 조명의 밝기 강화, 사각지대 재정비 순이었다. The purpose of this study was to analyze a research on fears of sex-crime and decision factor and to suggest safety walking environment about sex-crime. The method of the study are to analyze advanced research and to implement field-study of two-university and survey for female student. Followings are the results: 1) we need to consider campus environment of night for safety. 2) the spaces generated sex-crime were outdoor footpath, restroom, class room, parking lot, club room and entrance surroundings. 3) the spaces that felt fears of sex-crime were outdoor footpaths, restroom and entrance surroundings. 4) the reason that felt fears of sex-crime was rare human, dark light, blind spot and aging building. 5) what should be improved from sex-crime for safety walking environment of night were activation space, strengthen the brightness of the lighting and rearranged blind spot.
광역자치단체 도시재생 중간지원조직의 도시재생 교육 프로그램 한계점 및 개선사항 도출
고지영(Ko, Ji-Yeong),황규홍(Hwang, Kyu-Hong) 한국주거학회 2017 한국주거학회 학술대회논문집 Vol.29 No.1
The purpose of the study was to analysis the limitations and improvements for the urban regeneration educational program of the intermediary organizations in a Metropolitan area. The data for the analysis was collected through interview from July 13, 2016 to January 5, 2017, and the sample consisted of 21 educational programs in intermediary organizations in a Metropolitan area. The contents of investigation were made up of the 13 items. As a result of the analysis, this study suggests limitations and improvements through the current status and characteristics of the he urban regeneration educational programs of the intermediary organizations in a Metropolitan Area. The limitations of educational programs were educational imbalance due to differences in capability of local governments and support centers, a lack of connectivity between programs, a lack of the educational evaluation system, a cooperation between ministries, a lack of the post-monitering system for the participants and a difficulty in utilizing experts. This study gives implications of the establishment for the standardized educational program.
( Ji Won Min ),( Soon Kyu Lee ),( Yu Mi Ko ),( Ki Wook Kwon ),( Jeong Uk Lim ),( Yeong Bok Lee ),( Hye Won Lee ),( Yoo Dong Won ),( Young Ok Kim ) 대한신장학회 2014 Kidney Research and Clinical Practice Vol.33 No.3
Emphysematous pyelonephritis (EPN) is a life-threatening infection characterizedby the formation of gas. Complications of EPN include septic shock, acuterenal failure, and disseminated intravascular coagulation. Spontaneous subcapsularhematoma (SCH) has also been reported as a rare complication of EPN, althoughthere have been no reports to date of this occurring prior to the presentation of EPN. We report a case of EPN that initially presented as spontaneous SCH. The patientwas admitted for left flank pain, and initial computed tomography revealed SCHwithout any air shadows. Laboratory findings and clinical symptoms suggested thepresence of urinary tract infection and the patient was started on antibiotics. Feverdeveloped 24 hours after admission. On follow-up computed tomography 7 dayslater, EPN was newly observed, and a percutaneous drain was inserted. Blood, urine,and drainage fluid cultures all revealed growth of extended-spectrum β-lactamasenegativeEscherichia coli.