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강경찬(Kang Kyung-Chan),이진섭(Lee Jin-Seob),강기환(Kang Gi-Hwan),허창수(Huh Chang-Su),유권종(Yu Gwon-Jong) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
To survive in outdoor environments, phorovoltaic modules rely on packaging materials to provide requisite durability. We analyzed the properties of encapsulant materials that are important for photovoltaic module packaging. The properties of Ethylene Vinyl Acetate(EVA) sheet in photovoltaic encapsulant materials have to meet conditions that are high optical transmittance, good adhesion and high cross-linking rate. The objective of this paper is to understand the property evaluation methods of EVA sheet. Through this research, we could confirm that properties of EVA sheet have an effect on durability and operating efficiency of photovoltaic module.
Gwon, Jae-Gyoung,Lee, Sun-Young,Kang, Him-Chan,Kim, Jung-Hyeun 한국정밀공학회 2012 International Journal of Precision Engineering and Vol.13 No.6
For producing wood plastic composites (WPCs) having lightweight and cost efficiency, a microcellular injection foaming process is applied in our present work. Two types of exothermic foaming agents (EFA) with different range of particle size are used for formation of microcellular structure in WPCs. This research examines effects of particle size and concentration of the exothermic foaming agents on mechanical and physical properties of WPCs. The average cell size in WPCs is decreased with increasing the content of exothermic foaming agents. The large foaming agent shows small cell size compared to the small foaming agent case. Cell population density of foamed WPCs increases with increasing the EFA content, but decreases with decreasing the size of EFA. Concerning density and void fraction of foamed WPCs, the density is reduced but the void fraction is increased with increasing the EFA concentration. For the flexural strength, increment of amount of EFA decreases the mechanical strength because of the increase of cell density and void fraction. Also, the smaller size foaming agent (an AC9000 case) increases more strength due to influence of EFA size.
( Chan Woo Wee ),( Wonmo Sung ),( Hyun-Cheol Kang ),( Il Han Kim ),( Kwan Ho Cho ),( Taejin Han ),( Bae Gwon Jeong ),( Jae-Uk Jeong ),( Haeyoung Kim ),( In Ah Kim ),( Jin Hee Kim ),( Sung Hwan Kim ),( 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: To evaluate current practice and variability in contouring glioblastoma (GBL) gross target volume (GTV) and clinical target volume (CTV) among Korean radiation oncologists, eventually to establish a consensus guideline in the future. Methods: 9 representative cases of GBL differing in location, surgical extent, multiplicity, and midline crossing were chosen for the study. The MR images with simulation CT images from those cases were distributed to 15 radiation oncologists for GTV and CTV contouring. Contouring agreement was analyzed using the simultaneous truth and performance level estimation (STAPLE) algorithm consensus and kappa statistics. The agreement interpretation was evaluated using Landis and Koch`s interpretation of strength of agreement. GTV95 and CTV95 contours were obtained by STAPLE algorithm at the confi dence level of 95%. Results: No near perfect agreement was seen in any of the 9 cases. Substantial agreement of CTV delineation was seen in all but 1 case. In contrast, moderate agreement was seen in majority of cases regarding GTV delineation with substantial agreement in only 3 cases. Of the 15 radiation oncologists, 53-100% included the T2HSI within the CTV in the 9 cases. The mean maximal distance from the GTV to the CTV ranged 1.42- 3.17cm (median, 2.18cm). T2HSI was included within the CTV95 in all 9 cases. Conclusions: Only substantial agreement of CTV delineation was seen in a group of experts. Although heterogeneity exists in the inclusion of T2HSI and margins from GTVs, it seems reasonable to include the whole T2HSI volume in the initial CTV according to the STAPLE algorithm. Future consensus guideline including descriptions of margin status, inclusion of T2HSI, and dose-fractionation for GTV and CTV delineation in GBL is warranted and should be made upon a discussion between brain tumor radiation oncologists.
경북지방 소 Akabane병 발생과 중화항체가 분포조사
오강희 ( Kang Hee Oh ),박로찬 ( No Chan Park ),권헌일 ( Heun Il Gwon ),김이준 ( Lee Zun Kim ),박덕상 ( Duk Sang Park ) 한국가축위생학회 1991 韓國家畜衛生學會誌 Vol.14 No.1
A considerably high rate of abnormal deliveries of unknown etiology was observed among dairy cattles from November 1988 to February 1989 and Korean native cattles from January to April 1990. The abnormal deliveries consisted of abortions, stillbirths and calf deformities refers to as congenital arthrogryposis hydranencephaly (AH)syndrome. In order to know the level of Akabane antibody of dairy cattle raised in Kyungbuk province, serum neutralization test was conducted with Akabane virus(OBE-1 strain) and HmLu(Hamster lung) cell line. The results were summarized as follows. 1. During 4 months(Nov. 1988-Feb. 1989), abortion (3 heads), stillbirth(1 head) and congenital abnormalities(13 heads) of newborn were occurred in 17 dairy cattles raised in Kyungbuk province. 2. During 4 months(Jan. Apr. 1990), stillbirth(2 heads) and congenital deformities (13 heads) of newborn were occurred in 15 Korean native cattles raised in Kyungbuk province. 3. In Fey, and Apr. 1990, 1,005 dairy cattles at 99 farms were investigated on the actual condition of possessing Akabane antibody. The result was that 1,000 heads (99.9%) in 1,005 dairy cattles reacted as positive condition in Akabane antibody. The antibody titer was from 4 to over 256. 4. 189 heads (18.8%) of 1,005 dairy cattles werw below antibody titer 8 and 816 heads (81.2%) were over 16. 5. Akabane antibody titer of east coast legions(Pohang Yeongil etc) was all over 16, that of internal legions (Yeongju, Andong. etc) was relatively low. The rusult suggest that the vaccination for Akabane disease will be unnecessary for the time being because of possessing higher antibody titer reaction except the newly introduced cattle and Akabane virus was widely disseminated in kyungbuk province during the summer months in 1987 or 1988.