지로터 내접기어펌프의 형상에 따른 성능 비교 연구

류하오(Hao Liu),윤권수(Gwon Soo Yun),이인규(In Gyu Lee),이은진(Eun Jin Lee),신현명(Hyun Myung Shin),이재천(Jae Cheon Lee),전세호(Se Ho Jeon),김융성(Yung Sung Kim) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.11

In this paper, Three gear shapes of the gerotor pump are studied. First, a trochoid profile was illustrated using the cycloid curve. Secondly, a tooth profile which connected to the epicycloid curve and the hypocycloid curve was illustrated. Finally, it was illustrated a tooth tangent curve connected between Hypocycloid curve and epicycloid curve. The port was designed for the CFD analysis, and it was modeled with 3 profile in CATIA software. It was analyzed using PUMPLINX software to compare performance.

AWD용 지로터 펌프의 메가플로이드 기어 형상 설계와 시뮬레이션 성능 해석

류하오(Hao Liu),윤권수(Gwon Soo Yun),이인규(In Gyu Lee),이은진(Eun Jin Lee),신현명(Hyun Myung Shin),이재천(Jae Cheon Lee),전세호(Se Ho Jeon),김융성(Yung Sung Kim) 한국자동차공학회 2016 한국자동차공학회 지부 학술대회 논문집 Vol.2016 No.10

Gerotor pumps are internal gear pumps used in the lubrication system of the engine and transmission of auto mobiles. In addition, all-wheel drive(AWD) systems adopt them for the purpose of controlling the hydraulic system. In the automobile industry, improvements in fuel efficiency and noise reduction hae recently come to the fore. In this paper, a new type of gerotor is designed on Megafloid. It is composed of Hypocycloid curves, Epicycloid curves and tangent line between two curves. We modeled the three types rotor of Megafloid design, simulated by analyzing the internal fluid flow using a commercial computation fluid dynamics-code(CFD), and compared the volume effiiency.

Protective Effect of Nicotine on Gastrin-induced Gastric Mucosal Damage in Rats

박세호,김동구,김덕남,오정구,홍춘란,김경환,Piao, Shi-Hao,Kim, Dong-Goo,Jin, De-Nan,Wu, Zhen-Jiu,Hong, Chun-Lan,Kim, Kyung-Hwan The Korean Society of Pharmacology 1995 대한약리학잡지 Vol.31 No.3

위점막 손상에 미치는 영향에 관한 nicotine의 효과는 아직 정설이 없는 형편이다. 본 연구에서는 nicotine이 위점막 손상에 미치는 영향을 보기 위하여 nicotine (5 mg/kg, 10mg/kg)을 9일간 하루에 두번씩 위내 투여하였다. 위점막 손상은 gastrin (1.2 mg/kg)을 피하 주사함과 동시에 유문부결찰을 6시간 동안 시행하므로 야기시켰다. 그 결과 nicotine 투여군에서 현저한 위점막 손상의 감소를 보였다 (대조군의 50%). 이러한 nicotine의 위점막 보호 효과에 대한 기전을 추구하기 위하여 위관류 실험을 시행하였다. Nicotine은 기초 위산 분비에는 영향이 없었으나 gastrin으로 자극된 위산 분비를 현저히 감소시켰고, 이러한 반응은 nicotine 용량에 비례하였다. 이상의 결과로 보아 nicotine의 장기간 간헐적 투여는 gastrin 투여로 인한 위점막 손상에 보호 효과가 있으며, 이러한 효과는 gastrin으로 자극된 위산 분비를 억압하는 nicotine의 효과가 관련될 것으로 생각된다. 또한 nicotine의 위점막 손상 악화 효과를 관찰한 보고들을 고려하면 nicotine의 위점막 손상에 관한 효과는 nicotine의 투여 방법에 따라 전혀 다르게 나타날 수 있을 것으로 생각된다. Conflicting data have been reported on the effect of nicotine on gastric mucosal damage. To elucidate the effect of chronic intermittent nicotine on gastric mucosal damage, intragastric nicotine (5 mg/kg, 10 mg/kg) was administered twice per day for 9 days. Gastric mucosal damage was created by s.c. injection of a large dose (1.2 mg/kg) of pentagastrin followed by pylorus ligation for 6 hours. Nicotine treated rats showed reduced gastric mucosal damage about 50% of the control. To examine the mechanism of the protective effect of nicotine, gastric perfusion experiments were done. Basal acid secretion was not affected by intragastric or intravenous nicotine. However, pentagastrin-stimulated acid secretion markedly inhibited by a bolus injection of nicotine, and this response was dose-related. These data indicates that chronic intermittent administration of nicotine protects gastric mucosa against gastrin-induced gastric mucosal damage, and nicotine-induced inhibition of gastrin-stimulated acid secretion has an important role for the protective effect of nicotine. Considering reports concerning nicotine's aggravating effect on the gastric mucosal damage, it is suggested that the methods of administration of nicotine may be an important decisive factor of the divergent action of nicotine on the gastric mucosa.

Gastrin 유발 위점막 손상에 대한 Nicotine의 보호 효과

박세호(Shi Hao Piao),김동구(Dong Goo Kim),김덕남(De Nan Jin),오정구(Zhen Jiu Wu),홍춘란(Chun Lan Hong),김경환(Kyung Hwan Kim) 대한약리학회 1995 대한약리학잡지 Vol.31 No.3

Conflicting data have been reported on the effect of nicotine on gastric mucosal damage. To elucidate the effect of chronic intermittent nicotine on gastric mucosal damage, intragastric nicotine (5 mg/kg, 10 mg/kg) was administered twice per day for 9 days. Gastric mucosal damage was created by s.c. injection of a large dose (1.2 mg/kg) of pentagastrin followed by pylorus ligation for 6 hours. Nicotine treated rats showed reduced gastric mucosal damage about 50% of the control. To examine the mechanism of the protective effect of nicotine, gastric perfusion experiments were done. Basal acid secretion was not affected by intragastric or intravenous nicotine. However, pentagastrin-stimulated acid secretion markedly inhibited by a bolus injection of nicotine, and this response was dose-related. These data indicates that chronic intermittent administration of nicotine protects gastric mucosa against gastrin-induced gastric mucosal damage, and nicotine-induced inhibition of gastrin-stimulated acid secretion has an important role for the protective effect of nicotine. Considering reports concerning nicotine s aggravating effect on the gastric mucosal damage, it is suggested that the methods of administration of nicotine may be an important decisive factor of the divergent action of nicotine on the gastric mucosa. 위점막 손상에 미치는 영향에 관한 nicotine의 효과는 아직 정설이 없는 형편이다. 본 연구에서는 nicotine이 위점막 손상에 미치는 영향을 보기 위하여 nicotine (5 mg/kg, 10mg/kg)을 9일간 하루에 두번씩 위내 투여하였다. 위점막 손상은 gastrin (1.2 mg/kg)을 피하 주사함과 동시에 유문부결찰을 6시간 동안 시행하므로 야기시켰다. 그 결과 nicotine 투여군에서 현저한 위점막 손상의 감소를 보였다 (대조군의 50%). 이러한 nicotine의 위점막 보호 효과에 대한 기전을 추구하기 위하여 위관류 실험을 시행하였다. Nicotine은 기초 위산 분비에는 영향이 없었으나 gastrin으로 자극된 위산 분비를 현저히 감소시켰고, 이러한 반응은 nicotine 용량에 비례하였다. 이상의 결과로 보아 nicotine의 장기간 간헐적 투여는 gastrin 투여로 인한 위점막 손상에 보호 효과가 있으며, 이러한 효과는 gastrin으로 자극된 위산 분비를 억압하는 nicotine의 효과가 관련될 것으로 생각된다. 또한 nicotine의 위점막 손상 악화 효과를 관찰한 보고들을 고려하면 nicotine의 위점막 손상에 관한 효과는 nicotine의 투여 방법에 따라 전혀 다르게 나타날 수 있을 것으로 생각된다.

중국 산동성의 채소수출전략과 우리의 대응방안

박준근(Joon Keun Park),김호(Hao Jin) 한국식품유통학회 2002 食品流通硏究 Vol.19 No.1

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프로스포츠구단의 마케팅활동과 브랜드자산 간의관계

이정학(Lee, Jeong-Hak),이경률(Li, Jing-Lu),김호(Jin, Hao) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.6

The purpose of this study is to deliberate the basic marketing data for professional football team by inquiring the structure relationship between marketing 4P and brand awareness, brand image, brand loyalty. The questionnaires were given out to spectators who were attended to watch game between Guang Zhou Ever Grande FC and Shan Dong Lu Neng FC by using convenient sampling method. A total of 500 questionnaires were used as final validity sample and frequency analysis, confirmatory factor analysis, correlation analysis, structure equation model analysis were used by using PASW 20.0 and AMOS 20.0 version. And the results are as follow. First, the marketing activity of professional football team had significantly influenced on brand awareness. Second, he marketing activity of professional football team had significantly influenced on brand image. Third, he marketing activity of professional football team had significantly influenced on brand loyalty.

Fei-Ranis 노동과잉 경제발전이론에 관한 연구

김호 전남대학교 지역개발연구소 1999 지역개발연구 Vol.31 No.1

Hitherto, Fei-Ranis model under the labor surplus economy. In sum, this Fei-Ranis model simplifies the major characteristics of developing countries but at the same time it has a certain limit in understanding the inherent problem of employment in such a country. In general, one could find three weak points in the Fei-Ranis model comparing it to the reality of developing countries. Firstly, it could not induce enough employment opportunities in the non-agricultural industries due to the utilization of labor-saving or capital-intensive technology. Secondly, real wage rate in the non-agricultural industries begin to increase high enough even before the transitional point of economic development. Thirdly, the model presumes that there exists labor surplus in the rural area and full employment in the urban area, but, in fact, there exists a pretty high level of unemployment in the urban area and imperfect employment in the rural area rather than a full unemployment. Finally, the Fei-Ranis model emphasizes the technological improvements in the agricultural section in order to extract enough labor forces from the viral area and disregards the potential possibility of reducing the labor surplus by innovation in the agricultural sector, which is quite different from the what is happening in the real world: Rather, it seems to be highly desirable to absorb the surplus labor force by agricultural sector itself by developing the labor-intensive methods.

정부주도형 불균형공업화 정책의 성과와 문제점 : 한, 중 결제발전 모형의 비교연구를 중심으로 With and Emphasis on Comparative Study of Korean - Chinese Economic Develonment Models

김호 전남대학교 지역개발연구소 2000 지역개발연구 Vol.32 No.1

This study was intended to analyze the basic foundation of economic growth policy of Korea up until now and to compare it with Chinese economic policy in recent years. Besides, an analysis will be made on problematic issues raised from the successful records in Korean economic growth and their principal reasons would be explained. Finally, these issues and results were compared with Chinese economic growth policies which are prone to have quite similar problems to Korean ones in a sense. This approach was chosen mainly because the so - called $quot;Korean - style$quot; model of economic development has been applied in other Asian developing countries, especially in neighboring big country China. If the shortcomings of the $quot;so - called$quot; Korean model are well understood, the probable shortcomings of Chinese economic policy could be prevented in advance. Among other things, the principal investigator, as a native citizen of China, of this study has studied in Korea in order to obtain his doctoral degree in economics and has had strong interests in this area for a long time. With a background in this area, the problems of Korean model were well investigated in depth which could be useful for Chinese economic policies.

중국 채소류 현황과 한국 채소류의 수출가능성에 관한 연구

정순주,김호 전남대학교 농업과학기술연구소 2000 農業科學技術硏究 Vol.35 No.-

The total acreage for Chinese vegetables was 11.8 milion ha as of 1998, producing 365 million tons. Per capita consumption of vegetables was 150∼160Kg for urban residents in 1997. Among other things, vegetables of high quality and free of toxic chemical residues are in high demand among the consumers of higher income brackets. About 90% of the producers are managing their vegetable production on a leased land from the local government, maintaining average scale of 0.1∼0.2ha per farm. Most of them are using labor-intensive production method. Shadong Sheng is the biggest production area of vegetables in China. According to bilateral talks with the U.S. in WTO accession, China has to cut down the tariff rate to as low as 17% on the average by 2004. Korea has exported agricultural commodities of $39.5 million in 1999 to China. Comparing vegetable price of two countries, Korean price level is about 4.8 times higher than Chinese price level on the average, ranging between 1.4∼9.1 times depending upon the item. But, their regional variation by income level is very wide. So, potential export possibility of high quality Korean vegetables to China should be approached accordingly.

經濟開發過程에서 適正離農人口 計量분석에 관한 硏究

金衡模,金浩 木浦大學校 福祉社會硏究所 1998 福祉社會硏究 Vol.1 No.-