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윤정식,정지열,조숙희,김재훈,우계형,전재남,김재훈,Yoon, Jeong-Sik,Jung, Ji-Youl,Jo, Suk-Hee,Kim, Jae-Hoon,Woo, Gye-Hyeong,Jeon, Jae-Nam,Kim, Jae-Hoon 대한수의학회 2009 大韓獸醫學會誌 Vol.49 No.1
A 10-year old female Yorkshire terrier with nasal discharge and swelling was referred to the local animal hospital. Abnormal mass of right nasal cavity was detected in physical examination and radiography. According to the radiographs of the head, there was an evidence of bony destruction in right nose. Oronasal fistula was detected in right maxillary canine teeth. After surgical excision, the sample of nasal mass was refereed to Pathology Department of Veterinary Medicine in Jeju National University. Grossly, the enlarged mass was soft and 3 ${\times}$ 3 cm in size. Histopathologically, the neoplastic mass was composed of tubular to tubulopapillary structures which were lined by single to 6~7 layers of cuboidal to ciliated columnar cells. These neoplastic cells showed invasive tendency to adjacent normal parenchyma. They had uniform, round to oval nuclei, cytoplasm with small vacuoles and indistinct cellular margin. The number of mitotic figures was varied in different areas, ranged from 0 to 4 per high power field. Necrotic foci and infiltration of inflammatory cells including neutrophils, lymphocytes, and plasma cells also presented in the mass. Immunohistochemically, the neoplastic cells demonstrated strong positive reaction for cytokeratin (CK) 18 but were negative for CK 7 and 8. Based on the gross, histopathology and immunohistochemistry, this mass was diagnosed as nasal adenocarcinoma originated from respiratory epithelium.
태양광 어레이 설치 위치 및 각도변경 전후의 태양광 발전 시스템의 출력 변화에 관한 연구
윤정필(Jeong-Phil Yoon),차인수(In-Su Cha),최정식(Jeong-Sik Choi),김동묵(Dong-Mook Kim),박종복(Jong Bock Park),하민호(Min Ho Ha),김원배(Won Bae Kim) 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.4
In this paper, We have simulated the output variation of the PV arrays installation with position & angle change. The existing 3 solar array system are 43° southeast and each of the mounting angle is 17°. The PV output power is 240 kW. The composite studied systems in this paper arrays altered 2 PV array among 3 PV array system- the output 144kW. We simulated this system using Solar Pro ver.4.1. The simulation conditions are southwest 43°/array, mount angle 27°/array. Because the southeast have shadow effect-higher mountain The purpose of southwest 43° is reduce the shadow effect. The simulation results of the suggestion design algorithm compared to 1,590 kWh/year output is increased with the southeast.
윤정식 ( Jeong Sik Yoon ),강상철 ( Sang Chul Kang ),윤영민 ( Young Min Yun ),이상 ( Sang Lee3 ),김재훈 ( Jae Hoon Kim ) 한국동물위생학회 2012 韓國家畜衛生學會誌 Vol.35 No.1
A female slaty-backed gull (Larus schistisagus) died suddenly without apparent clinical signs. At necropsy, well demarcated 7 to 10 mm yellow to white nodules were presented at the lungs and thoracic cavity. Microscopically, multifocal necrotic granulomas were observed in the lung tissue and amorphous acidophilic fibrin were accumulated in the granuloma and normal alveolar space. Periodic acid-Schiff (PAS) staining demonstrated numerous pinkish red branched hyphae embedded in the center of these granulomas. According to fungal culture using Sabouraud`s dextrose agar plate, Aspergillus fumigatus was isolated from lung lesions. This is the first report for pulmonary aspergillosis of wild slaty-backed gull in Korea.
PV module을 적용한 교통시설물용 엘보-옹벽용(단면ㆍ양면)특성에 관한 연구
김대근(Dae-Geon Kim),윤용선(Yong-Sun Yoon),윤형상(Hyung-Sang Yoon),차인수(In-Su Cha),최정식(Jeong-Sik Choi) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
This paper represent about design of the controller for battery of a elbow of retaining wall for power supply using PV Module. Simulation is represents V-I and power characteristic by Mathematica & Design Center 63 & Qnet 2.1 Finally. we composed of road surface-signpost system Tills system is successfully operating with high clearness lights
PV module을 적용한 교통시설물용 PE 드럼 특성에 관한 연구
김대근(Dae-Geun Kim),윤용선(Yong-Sun Yoon),윤형상(Hyung-Sang Yoon),차인수(In-Su Cha),최정식(Jeong-Sik Choi) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper represent about design of the controller for battery of a PE drum for power supply using PV Module. Simulation is represents V-I and power characteristic by Mathematica & Pspice 6.0 & Qnet 2.1. Finally, we composed of road surface-signpost system. This system is successfully operating with high clearness lights.
Vinyl monomer에 의한 SIS block copolymer의 改質과 그 特性
왕은진,윤정식,유종선,백남철 慶熙大學校 材料科學技術硏究所 1991 材料科學技術硏究論集 Vol.4 No.-
The graft polymerization of 2-Hydroxyethylmethacrylate (HEMA) and Vinyltriethoxysilane (VTES) onto Styrene-isoprene-styrene block copolymer (SIS) was carried out in toluene, with radical initiators such as benzoyl peroxide(BPO) and α, α`-Azobisisobutyronitrile(AIBN) under nitrogen atmosphere. The degree of grafting was increased with the increases of the reaction temperature and reaction time. The efficiency of BPO was superior to that of AIBN. The mechanical properties and molecular weight of graft products were measured and the applicability as a adhesive of plasticized PVC leather was examined. The hardness and the molecular weight of graft products was increased with the increases of the degree of grafting, but elongation at break was decreased with the increases of one. And the tensile strength was maximum at the degree of grafting of about 6.5%. It was found that a toluene solution of graft products was confirmed to be an effective hot melt adhesive for the bond of plasticized PVC leather.
스티렌 - 부타디엔 - 스티렌 블록 공중합체의 개질과 그 특성
유종선,백남철,윤정식,왕은진 한국고무학회 1990 엘라스토머 및 콤포지트 Vol.25 No.4
The graft polymerization of 2-hydroxyethylmethacrylate(HEMA) and vinyltriethoxysilane(VTES) onto styrene-butadiene-styrene block copolymer(SBS) was carried out in toluene, with radical initiator such as benzoyl peroxide(BPO) and 2, 2'-azo-bis-isobutyronitrile(AIBIN) under nitrogen atmosphere. The degree of grafting was increased with the increases of the reaction temperature and time. And the effeciency of BPO was superior to that of AIBN. The mechanical properties and molecular weight of graft products were measured and the applicability as adhesive of plasticized PVC leather was examined.