나의 스트레스관리

김동구 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10

미군정기간중 天園의 敎育活動

김동구 서원대학교 교육연구소 2000 敎育發展 Vol.19 No.1

Chonwon is the pen name of Oh Chon Seok. In this study Chonwon's educational activities during the period of U. S. Military Government, 1945-1948 were explored the activities, the educational situation during the period was analyzed, Chonwon's educational thought was investigated and his educational policies were discussed. The Koreans faced a chaotic economic, political and social situation during the USAMGIK era. They also did not have the capacity to solve the long standing problems of their economic and political systems. Korean education was, under the specific conditions produced by the U. S. Military Government, practiced in the context of interaction with the international and national situation. Although no radical changes could be made with in the short three year period, education in Korea proved to be one of the most successful civil affairs activities. Chonwon's educational thought was based on both nationalism and democracy. His educational thought was the royal spirt to establish New Korea by educating the youngsters. He developed a democratic education movement by adapting new educational thoughts, and he also established the Korean Federation of Education Associations and the Progressive Education Association. Chonwon recommended the member of sub-committee on Purpose and Objectives who chose hongik ingan as the ideal of Korean education. The decision of subcommittee resulted in the enactment of Article 1, Section 1, of the Educational Low after the establishment of the new Korean Government. Chonwon helped to reopen the schools by General Order 5 and leaded in-service teacher traing for Korean democratic education. Chonwon also tried to establish Seoul National University by negotiating opinions between Korean and American educational personnel. One of the major works during the USAMGIK period was to establish the Seoul National University. The National Committee on Educational Planning adapted the 6-3-3-4 educational structure. During the processes of applying the system Chonwon gave most of his attention to the practical consideration of rebuilding the Korean school system as a member of the Committee. This modified plan democratized school system and resulted in an increased school population.

淸州鄕校와 文義鄕校에 관한 연구

김동구 서원대학교 사범대학 부설 교육연구소 1994 교육발전 Vol.13 No.-

아크 플라즈마를 응용한 수소제조 특성

김동구,박기배,명광식,한상도,한상옥 충남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.14 No.2

DC Arc Plasma was applied in order to convert of hydrocabon fuels (Methane) to hydrogen, which has higher available energy. Plasma can generate very high temperatures with a high degree of control, using electricity. Plasma can be used to produce the pure hydrogen fuel, and has rapid response time. In addition, the use of plasma could provide for a greater variety of operating modes including the posibility of virtual elimination of CO2 production by pyrolytic operation and could obtain byproduct (Carbonblack).

국내 감초 신품종의 급성 췌장염 보호 효과

김동구,민경현,Dong-Gu Kim,Kyung Hyun Min 한국자원식물학회 2023 한국자원식물학회지 Vol.36 No.4

Glycyrrhiza korshinskyi Grig. (Gk), which is a new variety of Glycyrrhiza, was developed by the National Institute of Horticultural and Herbal Science in Korea Rural Development Administration. It is improved the limitations of traditional Glycrrhiza species such as G. uralensis Fisch., G. glabra L., and G. inflata Batal. and has been reported various pharmacological effects. The aim of this study is to investigate the protective effect of Gk on the acute pancreatitis, because which has not been revealed yet. AP was induced via intraperitoneal injection of cerulein (50 ㎍/kg) hourly for 7 times in C57BL/6 mice. Gk water extract (20 or 50 mg/kg) or saline was administrated via oral gavage 1 h before the first injection of cerulein. The mice were sacrificed at 5 h after the final injection of cerulein. The inflammatory cell infiltration in pancreatic tissue was decreased by the administration of Gk water extract compared to the AP group. Also, serum amylase and lipase levels were decreased by the administration of Gk water extract compared to the AP group. These results suggest that Gk have protective effect on the acute pancreatitis.

상향링크 MU-MIMO에서 PAPR을 감소시키기 위한 프리코딩 기법

김도선(DoSeon Kim),김태우(TaeWoo Kim),이상화(Sanghwa Lee),양민호(Minho Yang),김동구(Dong Ku Kim) 한국통신학회 2017 한국통신학회 학술대회논문집 Vol.2017 No.6

동물실험기법 및 결과분석

김동구 주식회사 녹십자 2000 녹십자의보 Vol.28 No.6

스트레스성 궤양발생에 대한 중추 아드레날린성 활성도의 역할

김동구(Dong-Goo Kim),고창만(Chang Mann Ko),경춘호(Choon Ho Kyung),홍사석(Sa Suk Hong) 대한약리학회 1987 대한약리학잡지 Vol.23 No.2

스트레스로 인한 위궤양형성에 중추성 교감신경의 영향여부를 추구하기 위하여 norepinephrine, epinephrine, dopamine, isoproterenol 및 clonidine을 흰쥐의 뇌실내로 투여 하고 한냉 환경 (4˚C)에서 4시간 구속방치하여 위 분비기능의 변동과 궤양 발생 정도를 검색하여 다음과 같은 결과를 얻었다. 1. Norepinephrine, epinephrine, dopamine및 소량의 clonidine 처치로 궤양 발생이 현저하게 감소하였다. 2. Norepinephrine또는 epinephrine 처치군에서는 위액분비, 산분비 및 펩신 분비의 감소와 궤양 발생 감소가 초래되었다. 3. Dopamine혹은 소량의 clonidine 처치군에서는 궤양 발생의 감소와 위액분비 및 산분비 감소가 초래되었으나 펩신 분비는 변동 없었다. 4. Isoproterenol처치군에서는 궤양 발생과 펩신 분비는 대조군과 차이 없고, 위액분비 및 산분비의 감소만 나타났다. 5. 대량의 clonidine 투여군에서는 궤양발생, 산분비 및 펩신분비 모두 변동없이 약간의 위액분비 감소가 나타났다 이상의 결과로 보아 중추성 교감신경자극은 궤양 형성을 억압하는 작용이 있고, 이에는 교감신경성 α-수용체 및 도파민성 수용체가 관여된다고 믿어지며, 이 효과는 위액분비 감소 및 산 분비 감소작용과 아울러 또 다른 요인이 관여한다고 추측된다. The role of central adrenergic activity in the genesis of stress ulcers was investigated by intracerebroventricular (i.c.v.) administration of catecholamines and clonidine in pylorus-ligated rats restrained for 4 hours at a temperature of 4˚C. 1. The stress-induced ulceration was markedly decreased by the i.c.v. administration of norepinephrine, epinephrine, dopamine or low dose of clonidine. 2. After an i.c.v. administration of norepinephrine or epinephrine, the volume of gastric juice, and both acid and pepsin secretion were markedly decreased. 3. Dopamine or a low dose of clonidne decreased the volume of gastric juice and acid secretion but did not affect pepsin secretion. 4. Isoproterenol caused a decrease in the volume of gastric juice and acid secretion, however, the ulcerogenesis was similar to that of the control. 5. Gastric function as well as ulcerogenesis was little affected by a high dose of clonidine. From the above results, it is suggested that central adrenergic activation inhibits cold-restraint induced ulcerogenesis via adrenergic alpha and dopaminergic receptors, and that this effect may be mediated by a decrease in gastric acid secretion. It is also suggested that other factors may be involved in this antiulcerogenic effect.

The Selection of the Appropriate Computer Interface Device for Patients With High Cervical Cord Injury

김동구,이범석,임성은,김동아,황성일,임유림,박정미 대한재활의학회 2013 Annals of Rehabilitation Medicine Vol.37 No.3

In order to determine the most suitable computer interfaces for patients with high cervical cord injury, we report three cases of applications of special input devices. The first was a 49-year-old patient with neurological level of injury (NLI) C4, American Spinal Injury Association Impairment Scale (ASIA)-A. He could move the cursor by using a webcam-based Camera Mouse. Moreover, clicking the mouse could only be performed by pronation of the forearm on the modified Micro Light Switch. The second case was a 41-year-old patient with NLI C3, ASIA-A. The SmartNav 4AT which responds according to head movements could provide stable performance in clicking and dragging. The third was a 13-year-old patient with NLI C1, ASIA-B. The IntegraMouse enabling clicking and dragging with fine movements of the lips. Selecting the appropriate interface device for patients with high cervical cord injury could be considered an important part of rehabilitation. We expect the standard proposed in this study will be helpful.

MTMS와 TMES로부터 제조된 코팅 도막의 발수성에 미치는 촉매와 용매 종류의 영향

김동구,이병화,송기창 한국화학공학회 2019 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.57 No.6

Methyltrimethoxysilane (MTMS) and trimethylethoxysilane (TMES) as starting materials were dissolved in various types of solvents, and hydrolysis with water and polycondensation reaction were carried out using various types of catalysts to prepare non-fluorinated water-repellent coating solutions. The coating solutions were spin-coated on cold-rolled steel sheets, and thermally cured to prepare water-repellent coating films. The effect of types of catalysts and solvents on the water repellency of the resulting coating films was investigated during this process. When hydrochloric acid and nitric acid, which are strong acids, were used as catalysts, the solutions showed a white opaque state due to the aggregation of siloxane polymers. On the other hand, when acetic acid, phosphoric acid, and oxalic acid, which are weak acids, were used, they were in a stable and transparent state without precipitation. As a result, the contact angles of the coated films, prepared from hydrochloric acid and nitric acid, were 58o and 92o, respectively, showing low water repellency. On the other hand, when acetic acid, phosphoric acid, and oxalic acid were used, the contact angles of the coated films were 101o, 103o and 116o, respectively, showing high water repellency. In addition, when isopropanol and ethanol were used as solvents, phase separation occurred in the solutions due to the aggregation of siloxane polymers. On the other hand, when methanol, ethyl acetate, and methyl ethyl ketone were used as solvents, the solutions were transparent and showed a stable state without sedimentation. Methyltrimethoxysilane (MTMS)과 trimethylethoxysilane (TMES)을 출발물질로 사용하여 여러 종류의 용매에 용해시킨 후 다양한 종류의 촉매를 사용해 물과의 가수분해 및 중축합반응을 진행시켜 비불소계 발수 코팅 용액을 제조하였다. 또한 이 코팅 용액을 냉연 강판 위에 스핀 코팅하고 열 경화시켜 발수 코팅 도막을 제조 하였다. 이 과정 중 촉매와 용매의 종류 변화가 생성된 코팅 도막의 발수성에 미치는 영향을 연구하였다. 강산인 염산과 질산을 촉매로 사용한 경우에는 용액 내에 siloxane polymer들의 응집이 발생한 흰색의 불투명 상태를 나타냈다. 반면에 약산인 아세트산, 인산과옥살산을 사용한 경우에는 투명하고 침전이 없는 안정한 용액 상태를 보였다. 이로 인해 강산인 염산과 질산을 사용한경우의 코팅 도막의 접촉각은 각각 58o와 92o로 낮은 발수성을 보인 반면에 약산인 아세트산, 인산과 옥살산으로 제조된 경우에는 각각 101o, 103o, 116o의 접촉각을 보여 높은 발수성을 나타내었다. 또한 이소프로판올과 에탄올을 용매로사용한 경우에는 용액 내에서 siloxane polymer들의 응집이 일어나 불투명한 침전이 발생한 상분리 현상을 보인 반면 메탄올, 에틸아세테이트와 메틸에틸케톤을 용매로 사용한 경우에는 투명하고 침전이 없는 안정된 상태를 나타내었다.