열화상 정보를 이용한 온실 환경 모니터링 및 환경제어 시스템 개발

류관희 서울대학교 농업개발연구소 1999 농업생명과학연구 Vol.3 No.-

This study was carried out to investigate a plant-growth monitoring system using infrared thermography which can detect plant responses to improper environment. The experimental system for measuring leaf temperature using thermography consisted of a thermal camera, image processor, personal computer, and plant growth chamber. Under the N-deficiency or excess stress, the leaf temperatures of cucumber and lettuce were 2℃ and 1℃ lower than controls, respectively. Under the N deficiency stress the leaf temperature of hot pepper was 1℃ lower than control. Under the N excess stress, however, the leaf temperature of hot pepper did not change. Under the potassium deficiency or excess stress, the leaf temperatures of cucumber and hot pepper were 2℃ lower than controls, respectively. Under the potassium excess stress, the leaf temperature of lettuce was 2℃ lower than control. Under the potassium deficiency stress, the leaf temperature of lettuce did not change. Under the phosphorous deficiency stress, the leaf temperatures of cucumber and hot pepper were 2℃ and 1.5℃ than controls, respectively. However the leaf temperature of lettuce did not change. Under the water deficiency stress, the leaf temperatures of cucumber and lettuce were 2℃ and 1℃ higher than controls, respectively. However, the temperature of hot pepper was 1℃ lower than control. It was possible to detect the changes in leaf temperature by infrared thermography when subjected to nutrition or water stress. Since the changes in leaf temperatures were different each other for plants and kinds of stress, however, it would be necessary to add a nutrient measurement system to a plant-growth monitoring system using thermography.

첨단온실의 원격 생육환경 감시 시스템 개발

류관희 서울대학교 농업개발연구소 2001 농업생명과학연구 Vol.5 No.-

This study was carried out to desing, construct, and test a greenhouse monitoring system for supervising the greenhouse environment from a remote site, by using internet. The measurement items selected among many environmental factors were temperature, humidity, solar radiation, CO_2 concentration, SO and NO concentration of atmosphere, EC, pH of nutriend solution, the state of control devices, and images of the inside of greenhouse. The greenhouse monitoring system was composed of a network system and a measurement module.

청정채소 공정생산 자동화 시스템 개발

류관희 서울대학교 농업개발연구소 2000 농업생명과학연구 Vol.4 No.-

The purpose of this study was to develop an automated vegetable production system for plant factory from transplanting to harvesting. The system was designed to be able to have consistent automatic processes of operation such as transplanting, complementary transplanting for the cells with missed or bad seedling, transferring growing troughs into the cultivation benches, automatic spacing at growth stages, harvesting and packing. The design criteria for the automated vegetable production system were set up, the individual units of the system were tested separately, and the integrated system was also tested through lettuce growing experiment. The automated vegetable production system functioned well, but the work capacities and accuracies of the some units such as the harvesting unit should be further improved.

光陽地域 金屬鑛床에 대한 岩石學的 및 鑛物學的 硏究

金熙南,柳官善 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1

The studied area is lobated in the central part of Kwang-Yang, Chullanamdo, which is in the south west of the Gyeongsang basin, The geology consists of the Pre-Cambrian Jirisan gneiss complex as its country rock, covered with the Gyeongsang system sedimentary rock giving unconformity in the Cretaceous period, and is intruded by volcanic rocks and plutonic jgneous rocks. These deposits are fissure filling hydrothemal ore deposits which were formed through fissure with the strike N 20^˚~50^˚E and the dip 70^˚~85^˚SE in the Pre-Cambrian Jirisan gneiss complex. They consist of gold, silver, and quartz veins. Ore minerals are chalcopyrite, arsenopyrite, pyrrhotite, pyrite, galena, sphalerite, native gold, bornite, and covellite. The source rock of the ore minerals is granite porphyry, plutonic igneous rocks intruded in the late Cretaceous period. The method of study is as follows: 150 pure rock samples and 50 ore samples were picked up around the deposits and outcrops, and classified according to the distributed areas and their kinds. 80 thin sections out of 150 rock samples and 40 polished sections out of 50 ore samples were made and a modal analysis were made of them each. And 10 out of the thin sections were made chemical analysis. 5 out of the polished sections were made X-Ray diffraction analysis, which made a verification of what kind of ore minerals are contained in them. As a result of the modal analysis, the granite rocks ill the studied area are plotted by quartz monzodiorite, and have the similarity of the Bulgugsa granite rocks, and its gneiss is plotted by granodiorite and is similar to the Hongjesa granite gneiss. From the results to the Hongjesa granite gneiss but are poor in SiO_2 and rich in FeO, MgO and MnO, For this reason, it is thought that these rocks contain the minerals of the garnet group. These rocks belong to the alkali-calcic rock series in the alkali lime index composed by Peacock. By the I-S type classification by White, Chappell(1977) and Hine(1978) and by the A C F diagram and the normative’s Qu-Or-Ab triangular diagram, these rocks originated from sedimentary rocks. The Proportion of the alk:fm of the Niggli mean value is 19:46, and these rocks were possibly generated from before the Bulgugsa granite and Masan granite age. From the AMF diagram these rocks are coincident with the Gyeongsang basin trend in granite and similar to the Hyndmann trend in gneiss. In the AKF diagram and normative Or-Ab-An diagram, the rocks in the studied area are rich in albite, and compared with S.R. Nockold’s world rock mean value, they belong mostly to tonalite and diorite.

조기위암의 임상적 연구

박태준,양은수,류종철,박태군,이희승,신원창,이진호,김관엽 인제대학교 1994 仁濟醫學 Vol.15 No.1

1989년 9월부터 1993년 7월까지 인제대학교 의과대학 상계백병원에서 실시한 위내시경 소견이 조기위암이며 내시경 직시하 생검결과 선암으로 판명되어, 근치적 위절제술을 시행받은 23명의 환자에서 임상적 특징을 알아보고, 문헌고찰과 함께 보고하는 바이다. The incidence and mortality rate of stomach cancer ranks well ahead of all malignancies in Korea. The prognosis is excellent in early gastric cancer of which the overall 5 years survival rate of 85∼95% is comparative with that of advanced gastric cancer of 15∼49%. So early detection with very sensitive mordality of gastroscope and surgery is the only premise to decrease the mortality rate of gastric cancer. This report deals with the clinical aspects of 23 cases of early gastric cancer, which were confirmed with histopathologic examination of resected stomach during the 4 years from September 1989 to July 1993 at Sanggye Paik hospital, Seoul, Korea. Out of 23 cases of early gastric cancer, 14 cases were male, 9 cases were female, and the male to female ratio was 1.6 : 1. The most common type of early gastric cancer was talc type(43.5%), IIc and its combined type comprised most of them(87.0%). The most prevalent sloe of lesion was gastric angle(43.5%) and the most common direction was lesser curvature(73.9%) 19 cases of 23(78.3%) were between 1∼3cm in size, and there was no statistical significance between the size of the lesion and lymph node metastasis. Of the 9 cases with mucosal lesion, there were 2 cases with lymph node metastasis(22.2%), but 7cases(50.0% ) of 14 cases with submucosal lesion presented lymph node metastasis. Diagnostic accuracy of endoscopy on detection of early gastric cancer was 17 cases(73.9%) of total 23 cases in our study. As with other report, histopathulogic examination of resected stomach revealed adenocarcinoma, tubular type as the most common type. Frequent complaint of patients with early gastric cancer was epigastric pain(65.2%), and duration of the symptom was less than 12 months in 17 cases(73.1%) of 23 patients with early gastric cancer.

다구역 재배용 양액 자동 조제ㆍ공급 시스템 개발

Ryu Kwan-Hee(류관희),Kim Gi-Young(김기영),Cheon Sung-Pil(전성필) (사)한국생물환경조절학회 2000 시설원예‧식물공장 Vol.9 No.1

증착각도에 따른 비정질 Se₇₅Ge₂₅박막의 광유기 효과에 관한 연구

柳熙寬(Hee-Kwan Ryu),許?(Hyee Huh),金榮浩(Young-Ho Kim),鄭鴻倍(Hong-Bay Chung) 대한전기학회 1987 전기학회논문지 Vol.36 No.2

전기비저항을 이용한 철탑 기초 제원 예측

류희환(Hee-Hwan Ryu),김태균(Tae-Kyun Kim),연관희(Kwan-Hee Yun),김경열(Kyoung-Yul Kim),조선아(Seon-Ah Jo),한세진(Se-Jin Han) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.7

기계시각을 이용한 육묘용 로봇 이식기의 개발

류관희(Ryu Kwan Hee),김기영(Kim Gi Young),이희환(Lee Hee Hwan),한재성(Han Jae Seong),황호준(Hwang Ho Jun) (사)한국생물환경조절학회 1997 시설원예‧식물공장 Vol.6 No.1

감염관련 혈구탐식증후군 (Infection-Associated Hemophagocytic Syndrome)으로 추정되는 2예 보고 및 국내 증례 분석

류동렬,염준섭,장경희,홍성관,박윤수,최영화,송영구,양우익,유내춘,한지숙,김준명 대한감염학회 1998 감염 Vol.30 No.5

목적: 혈구탐식증후군은 골수, 간, 림프절 및 비장에 조직구 증식과 침윤이 있으면서 이들에 의한 혈구탐식의 소견을 보이며, 임상적으로는 고열, 전신쇠약, 간비종대 및 림프절종대를 보이고, 말초혈액에서 범혈구 감소증, 혈액응고 이상 및 간기능 이상을 보이는 질환이며, 악성 질환의 증거없이 감염증과 관련되어 나타나는 경우를 infection-associated hemophagocytic syndrome이라 한다. 저자 등은 평소 건강하던 환자에서 감염증과 관련된 것으로 추정되는 혈구탐식증후군 2예를 경험하고 보고하고 현재까지 국내에서 보고된 IAHS에 대한 역학, 임상증상, 검사 소견, 관련 감염 질환, 기저 질환의 유무에 대해 고찰하고자 하였다. 방법: 1985년부터 국내에서 보고된 IAHS에 대한 31예의 증례보고를 고찰하고, 본원에서 경험한 증례 2예의 임상증상, 말초혈액 소견, 골수 천자 소견을 조사하였다. 결과: 총 33예의 IAHS 중 평균 연령은 20.8세 였고 남녀의 비율은 2:1로 남자에서 흔하였으며, 발열(100%), 간종대 (84.8%) 비종대 (81.8%), 범혈구감소증(51.5%), 혈액응고장애(69.7%), 간기능이상 (75.8%) 소견이 흔하게 관찰되었고, 바이러스 감염과 동반된 경우가 10예였으며 그 중에서 헤르페스 바이러스가 가장 흔하였고, 세균감염이 7예에서 동반되었다. 스테로이드 치료, 발기신부전, 간경변, 급성 골수성 백혈병 및 골수 이형성 증후군으로 화학요법을 시행 받은 후 면역 억제 상태에서 발생한 경우도 있었으나, 기저 질환을 찾을 수 없는 경우도 25예가 있었다. 결론: 감염증과 관련된 혈구탐식증후군은 비교적 드문 질환이나 현재까지 그 치료방법에 대해 정립된 바가 없어 치명적일 수 있다. 향후 본 질환에 대한 정확한 진단과 관련 감염질환을 찾기 위한 노력이 좀더 적극적으로 이루어져야 할 것이며, 적절한 치료법의 정립이 필요할 것으로 사료된다. The hemophagocytic syndrome is a disorder caused by systemic proliferation of benign histiocytes with avid phagocytosis of blood cells. Although this is an established disease entity, early clinical diagnosis is often difficult. The disease is known to be rare. The clinical and laboratory characteristics of 33 patients with the infection-associated hemophagocytic syndrome were reviewed which included previously reported 31 cases from the literature, and 2 recent cases presented in this study. The patients were 22 males and 11 females with a mean age of 20.8 years(range 1 to 69 years). Ten patients were associated with viral infection and seven with bacterial infection. The infection usually occurs in patients with preexisting immunological abnormalities, but in this study underlying illness was found in only 8 out of the 33 cases. The overall mortality rate was 63.6%, which is a higher percentage than in other countries. Since the clinical course can be fulminant, accurate diagnosis and effective treatment are needed.