돼지의 Perirenal Edema의 자연발생예(自然發生例)와 실험적발생예(實驗的發生例)의 병리학적소견(病理學的所見)

조성환,이차수,Cho, Sung-whan,Lee, Cha-soo 대한수의학회 1984 大韓獸醫學會誌 Vol.24 No.2

This paper dealt with the histopathological observations of the perirenal edema in pigs and rabbits administered with Amaranthus retroflexus, based on the clinical and pathological observations of the porcine perirenal edema naturally occurred in Korea. The results observed are summarized as follows; In the natural case, clinical signs were trembling, weakness and incoordination of the hindquarters, followed by sternal recumbency, coma and death. Death usually occurred within 24 hours after the signs of illness appeared. In gross findings, the grayish yellow fluid in the perirenal area was observed in each case. In some cases, the amount of fluid in the thoracic and abdominal cavities was increased and the yellowish red color of the hydrothorax and ascites was seen. When the renal capsule was incised, the kidneys were enlarged and congested and petechiae on the cortical surface and blood clots on the capsule appeared. In microscopical findings, there were cloudy swelling, hyaline droplets and necrosis of the convoluted tubules containing proteinaceous casts and a few oxalate crystals. In addition, interstitial and perivascular edema, distention of the Bowman's space and the convluted tubules and hemorrhages were recognized. In the weanling pigs and the adult pig fed various weeds, including Amaranthus retroflexus, Euxolus blitum and Portulaca oleracea, the pigs fed Amaranthus retroflexus appeared clinical signs and pathological findings of perirenal edema usually seen in the pigs of natural cases. In the pigs fed Euxolus blitum or fed Portulaca oleracea, neither clinical signs nor pathological changes were seen. It was regarded that this disease was affected with Amaranthus retroflexus, but there was no sensitivity in the adult pigs.

PVC 배관부품의 마찰 손실

조성환,최진희,Cho, Sung-Hwan,Choi, Jin-Hee 대한설비공학회 1984 설비저널 Vol.13 No.4

Friction factors and equivalent sand roughness of PVC pipe fittings have been studied by experiments in the Reynolds number range of $2,000\~70,000$. PVC pipe fittings studied are straight pipes, $90^{\circ}$ elbows and tees with 15, 25, and 40mm in norminal diameter, all manufactured in Korea with KS mark approval. Equivalent relative roughness of PVC pipes obtained lies between smooth pipe and 0.002. The study shows that equivalent sand roughness of PVC pipes increasses in proportion of the square root of pipe diameter , and can be approximately abtained by multiplying 4 to the root mean square value measured by metal surface roughness tester. Loss coefficient of PVC $90^{\circ}$ elbows decreases slowly with increasing Reynolds number. Loss coeffiicent of tees is a function of ratio of flow rates and Reynolds number.

Analysis of Ground Heat Loss in Ondol Heating Systems

조성환,김관호,Cho, Sung-Hwan,Kim, Kwan-Ho 대한설비공학회 1978 설비저널 Vol.7 No.3

온돌 난방계통에서 지면을 통한 열손실을 수학적으로 등각사상과 변수변환방법을 사용하여 해석하였다. 2차원 및 3차원 해석 결과를 얻었다. 난방되는 주택은 직사각형이라고 가정하였다. 그림 2를 사용하여 평균 지면 열손실을 구할 수 있다. 열 특성치가 열 손실에 미치는 효과에 대하여 설명되었다. 열손실을 구하는 수치적 보기를 주었다. Heat loss to the ground in ondol heating system is analyzed mathematically using conformal mapping and variable transformations, Both two-and three-dimensional systems are analyzed. Heated house is assumed to be rectangular shape. Mean value of heat loss to the ground can be obtained using Figure 2. Effects of thermal parameters to heat loss are discussed. Numerical examples are also given.

항공사 안전관리시스템에 대한 조종사의 인식과 안전행동에 대한 연구

조성환,김기웅,박성식,Cho, Sung Hwan,Kim, Ki Woong,Park, Sung Sik 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.2

This paper has tried to research the perception of pilots in a commercial airliners or full service carriers focusing on the airliner's safety management system (SMS). ICAO requires the airliners to set up the basic standards of SMS since the SMS is believed to be the core of the aviation risk management. According to the previous study, it was proved safety climate of an airline affects the safety behavior of cockpit crews. Safety climate is different from safety culture and the safety climate has an advantage to be measured more quantitatively than the culture. That is, the safety climate could be represented as SMS. As the results of the empirical study based on Chen & Chen(2014)'s SMS practice sacle, it had been assumed at the beginning the major factors such as Clarification of SMS, Safety Training for Crews and Sharing of SMS Information have positive effects on the motivation for safety behaviors. The motivation is directly correlated to crews' safety behaviors. However, the result showed the clarification of SMS has not a significant effect on their safety behaviors. The main reason is cockpit crews, through the survey, perceived airline seemed to have no definite standards of SMS and the senior management to have less interest in aviation safety.

Prostaglandin F₂_α 투여(投與)에 의한 생쥐 태반(胎盤)의 조직학적변화(組織學的變化)

조성환,이차수,Cho, Sung Whan,Lee, Cha Soo 대한수의학회 1979 大韓獸醫學會誌 Vol.19 No.2

This paper was carried out to observe prostaglandin $F_{2{\alpha}}$-induced morphological changes in the placenta. White mice received intramuscular injections of $PGF_{2{\alpha}}$(containing dinoprost tromethamine 0.5mg/ml, Upjohn Co.) in once or twice with doses of 0.1ml on 10th to 18th day of their respective pregnancies, the histological changes of the placentae and ovaries were observed with light microscope. Abortion within 21 to 51 hours following $PGF_{2{\alpha}}$ administration occurred in the pregnant mice. Vacuolization of trophospongial cells, giant cells and myometrium under decidua basalis, spherical acidophilic inclusion bodies of various sixtes in trophospongial cells and giant cells. hydropic degeneration and necrosis of labyrinthine trophoblasts and yolk cells, and infltration of neutrophils in the placenta and the uterus were observed. In addition, there were decrease in glycogen of the placental labyrinth and the visceral yolk sac, but increase in glycogen deposit of mesometrial myometrium. Atrophy and increase in number of large lipid droplets of the luteal cells and proliferation of fibroblasts were also recognized in the corpora lutea.

Oxalate, Nitrate 및 Calcium 혼합투여(混合投與)에 의(依)한 돈(豚) 및 가토(家兎)의 Perirenal Edema 발병(發病)

조성환,이차수,Cho, Sung-whan,Lee, Cha-soo 대한수의학회 1986 大韓獸醫學會誌 Vol.26 No.1

In order to clarify the pathogenesis of perirenal edema, pigs and rabbits were administered with oxalate and nitrate, with oxalate nitrate and glycolic acid, with oxalate, nitrate and ascorbic acid and with oxalate, nitrate and calcium, respectively. The results obtained are summarized as follows; The pigs and rabbits administered with oxalate and nitrate with oxalate, nitrate and glycolic acid and with oxalate, nitrate and ascorbic acid, respectively, were not showed perirenal edema despite of observing the abundant oxalate crystals in the proximal convoluted tubles. But pigs and rabbits administered with oxalate, nitrate and calcium were histopathologically showed perirenal edema similar to those of pigs fed Amaranthus retroflexus. Therefore, author considered that oxalate, nitrate and calcium are main factors to cause perirenal edema. It was regarded that perirenal edema in pigs was caused by the reciprocal reactions of those materials including oxalate, nitrate and calcium which may produce vascular damage, decreased osmotic pressure by hypoproteinemia and increased vascular permeability in kidney, rather than the mechanical obstructions by the oxalate crystals in the proximal convoluted tubule.

한우(韓牛)의 위장관(胃腸管)에 존재(存在)하는 내분비세포(內分泌細胞)의 면역세포화학적(免疫細胞化學的) 연구(硏究)

조성환,키타무라 노부오,Cho, Sung-whan,Kitamura, Nobuo 대한수의학회 1988 大韓獸醫學會誌 Vol.28 No.2

Regional distribution and relative frequency of endocrine cells in ten portions of the gastrointestinal tract of the Korean native cattle were observed by immunocytochemical methods using specific antisera against chromogranin, serotonin, somatostatin, glucagon, bovine pancreatic polypeptide(BPP), motilin, gastric inhibitory polypeptide(GIP), neurotensin, secretin, gastrin and substance P. The results observed are summarized as follows: In the abomasum, chromogranin-, serotonin-, somatostatin-, motilin-, glucagon-, gastrin-, and substance P-immunoreactive cells were found. Chromogranin-and serotonin-immunoreactive cells were more numerous in the fundic region than pyloric region. Somatostatin- and gastrinimmunoreactive cells were numerous in the pyloric region than in the fundic region. In the small intestine, chromogranin-, serotonin-, somatostatin-, glucagon-, BPP-, motilin-, gastrin-, GIP-, neurotensin-, secretin-, and substance P-immunoreactive cells were detected. Chromogranin-, somatostatin-, GIP- and secretin-immunoreactive cells were most numerous in the duodenum, while BPP-, motilin-, glucagon-, neurotensin- and substance P-immunoreactive cells were rarely seen in the small intestine. In the large intestine, chromogranin-, serotonin- and BPP-immunoreactive cells were widely distributed and most numerous in the rectum. Somatostatin-, glucagon- and substance P-immunoreactive cells were rarely seen in the large intestine.

MMAS 기법에 의한 지적불부합지 탐색기법

조성환,허용,Cho, Sung-Hwan,Huh, Yong 한국국토정보공사 공간정보연구원 2015 지적과 국토정보 Vol.45 No.2

This paper suggests the MMAS(Map Matching using Additional Surveying) method to improve the cadastral discrepancy search algorithm that currently does not include corrections of mis-represented parcel data. The MMAS is a method to search for cadastral discrepancy after correcting mis-represented parcel data using nearby anchor points confirmed by surveys. The MMAS first transforms the coordinate system of the digital cadastral map by overlaying anchor points obtained in the field surveying process over the corresponding edges of buildings and facility points on the digital topographic map. Then, it searches for cadastral discrepancy by checking if the area differences exceed the tolerance limit. This method improves the current method for searching for cadastral discrepancy by performing the process after correcting extortion of the digital cadastral map. This helps to identify cadastral discrepancies that are not detectable within the distorted digital cadastral map. With our experiment, this method identified more discrepancies compared to the method without the correcting the distortion of the digital cadastral map. We believe this method will be able to help the national cadastral re-survey by identifying potential cadastral discrepancy more accurately. 본 논문은 현재의 지적불부합지 탐색 방법이 지적경계의 현행화 과정 없이 이루어지는 것을 보완하기 위하여 지적경계 현행화 기반의 탐색 기법인 MMAS를 제안하고자 한다. MMAS는 지적측량 시 취득한 측정점 주변 고정물을 이용하여 지적경계를 현행화한 후 지적불부합지를 탐색하는 기법이다. MMAS 처리 순서는 우선 지적도와 지형도로부터 동일한 대상 영역을 추출하여 대상 영역에 존재하는 지적측량 시 취득한 측정점 주변 고정물과 이에 대응하는 수치지형도의 시설물 그리고 지적 필계점과 담장 경계점을 이용하여 대응쌍을 생성한다. 생성된 대응쌍을 기준으로 현행화를 수행하고, 마지막으로 현행화 후의 면적 오차를 계산하여 공차범위 내 포함 여부를 확인하여 잠재적 지적불부합 대상 필지를 분류한다. 제안 기법은 현재의 지적불부합지 탐색기법이 지적경계의 현행화가 배제된 토지(임야)대장 상의 면적만을 고려한 방법의 한계점을 보완하고, 현행화된 지적경계에 의한 좌표면적의 산출을 통해 지적불부합지 현황 조사의 범위를 잠재된 지적불부합지까지 확장하는데 의의가 있다. 제안 기법에 의해 잠재된 지적불부합지 필지를 탐색한 결과 지적경계의 현행화 이전의 결과보다 증가된 불부합 필지를 탐색할 수 있었다. 제안 기법은 현재 잠재되어 있는 지적불부합 필지를 탐색할 수 있는 방법이 없는 상황에서 지적재조사를 위한 지적불부합지 탐색에 적용 가능할 것으로 판단된다.

개 담관세포암(膽管細胞癌)의 1예(例)

조성환,김덕환,김교준,권오덕,박노태,Cho, Sung Whan,Kim, Duck Hwan,Kim, Kyo Joon,Kwon, Oh Deog,Park, No Tai 충남대학교 농업과학연구소 1986 Korean Journal of Agricultural Science Vol.13 No.2

식욕부진(食慾不振) 및 복부팽만(腹部膨滿)을 충남대학교(忠南大學校) 농과대학부속가축병원(農科大學部屬家畜病院)에 의뢰(依賴)된 11년(年)된 암컷 잡종견(雜種犬)을 병리조직학적(病理組織學的)으로 관찰(觀察)한 바 담관세포암으로 진단(診斷)하였고 그 결과(結果)는 다음과 같다. 임상적(臨床的) 소견(所見)으로 복부팽만(腹部膨滿), 식욕부진(食慾不振), 호흡곤란(呼吸困難), 및 침울(沈鬱) 등(等)을 관찰(觀察)할 수 있었고, 혈중(血中) GOT, GPT, LDH 및 BUN등(等)은 정상치(正常値)보다 증가(增加)하였으며 총단백량 및 Albumin 은 약간 감소(減少)하였다. 육안적(肉眼的) 소견(所見)으로 간장(肝臟)은 종대, 표면(表面)에는 많은 백색(白色)의 꽃양배추양 결절(結節)이 있었으며 직경(直徑) 3~4cm의 낭형성(囊形成)이 있었다. 낭내(囊內)에는 황백색(黃白色)의 교상물질(膠狀物質)이 차 있었다. 해부학적(解剖學的)으로 본종양을 간내(肝內) 담관암으로 분류(分類)하였다. 조직학적(組織學的)으로 본종양은 관상암과 담관낭종암이 혼합(混合)되어 있었으며 관상암은 관상구조(管狀構造)가 특징(特徵)으로 내피세포(內皮細胞)는 입방형(立方形) 또는 원계형(圓桂形)이며 결합조직(結合組織)의 증식(增殖)을 볼 수 있었다. 그리고 담관낭종암은 단층(單層)및 중층입방형(中層立方形) 또는 국주형세포(國柱形細胞)로 덮혀 있었다. On 11-year-old female mixed-breed dog with chief complaints of existence of abdominal enlargement and anorexia was referred to the veterynary teaching hospital of Chungnam National University. The dog was diagnosed into cholangiocarcinoma by the result of the histopathological observation. The results observed are summarized as follows: The clinical signs were abdominal enlargement, anorexia, dyspnea and depression. There were marked increase in serum glutamic pyruvic transaminase(GPT), serum glutamic oxaloacetic transaminase(GOT), lactic dehydrogenase(LDH) and blood urea nitrogen(BUN). Serum total protein and albumin were slightly below normal. In gross finding, the liver was enlarged and friable with numerous white, cauliflower-like nodules over the surface and composed on cysts from 3 to 4 cm in diameter. The cystic lesions contained a yellow gelatinous material. Anatomically, this neoplasm was classified as intrahepatic bile duct carcinoma. Histologically, this neoplasm was combined tubular carcinoma with bile duct cystadenocarcinoma. The former were characterized by tubular structures lined by anaplastic cuboidal or columnar cells with diffuse fibrous stroma, and the latter by multiple cystic structures lined by simple and stratified cuboidal or columnar cells.

일사조절형 창문 시스템

조성환,Cho, S.H. 대한설비공학회 1997 설비저널 Vol.26 No.4