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전라남도 신안군, 완도군, 진도군의 233개 무인도서에 서식하는 조류 분포 현황
김석규,김현규,심용택,이건형,나종길 한국자연보호학회 2016 한국자연보호학회지 Vol.10 No.1
This survey was conducted as a sector study of a reasonable management plan for uninhabited islands. we conducted bird surveys at 233 uninhabited islands of Shinan-gun, Jindo-gun, Wando-gun in Jeollanam-do from May to October, 2012. In this study, total 26 family and 39 species were observed. Among them three bird species, falcon, eagle owl, oyster catcher belonged in endangered category I and II which is protected by the law in Korea, and four species, tattler, storm petrel, streaked shearwater, oyster catcher which are Near Threatened (NT) according to IUCN (International Union for the Conservation of Nature) Red List (2015) were observed. Uninhabited islands are used as habitats of many resident and/or stopover birds and need to be conserved and protected from destroying by human outdoor activities. This survey is to aim at making a comprehensive plan to conserve these islands if necessary.
김석규,정재헌,손미경 대한치과보철학회 2015 The Journal of Advanced Prosthodontics Vol.7 No.3
PURPOSE. The purpose of this study was to examine the abutment screw stability of screw- and cement-retained implant-supported dental prosthesis (SCP) after simulated cement washout as well as the stability of SCP cements after complete loosening of abutment screws. MATERIALS AND METHODS. Thirty-six titanium CAD/CAM-made implant prostheses were fabricated on two implants placed in the resin models. Each prosthesis is a two-unit SCP: one screw-retained and the other cemented. After evaluating the passive fit of each prosthesis, all implant prostheses were randomly divided into 3 groups: screwed and cemented SCP (Control), screwed and noncemented SCP (Group 1), unscrewed and cemented SCP (Group 2). Each prosthesis in Control and Group 1 was screwed and/or cemented, and the preloading reverse torque value (RTV) was evaluated. SCP in Group 2 was screwed and cemented, and then unscrewed (RTV=0) after the cement was set. After cyclic loading was applied, the postloading RTV was measured. RTV loss and decementation ratios were calculated for statistical analysis. RESULTS. There was no significant difference in RTV loss ratio between Control and Group 1 (P=.16). No decemented prosthesis was found among Control and Group 2. CONCLUSION. Within the limits of this in vitro study, the stabilities of SCP abutment screws and cement were not significantly changed after simulated cement washout or screw loosening.