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적응가변구조 방법을 이용한 DC MOTOR 제어에 관한 연구
하재해,한창훈,조용갑,최부귀 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.1
Direct methods and indirect methods for the adaptive control of linear plant, DC motor, are currently well known. Recently, methods for combining direct and indirect methods have also been suggested. In this note the latter method is combined with the variable structure method. New adaptive laws are suggested which overcome the principal draw-backs of the variable structure method. While the direct and indirect components of the new method assure stability, the variable structure component improves the transient response of the system. Simulation results are presented to show that the overall system is asymptotically stable in the ideal case, and exhibits robustness and improved performance in the presence of perturbations.
1999년에 발생한 기상재해 유형별 벼 수량반응조사 연구
주영철,임갑준,한상욱,박중수,조영철,김순재 한국농림기상학회 2000 한국농림기상학회지 Vol.2 No.1
The objectives of this study were to investigate weather conditions which induced discolored grains and viviparous germination, and to evaluate yield responses following viviparous germination during mid- and late- ripening stage, the submergence during reproductive growth stage, and lodging in the yellow ripe stage. Weather conditions which caused glume discoloration at heading stage were 21.3-26.4℃ in average temperature, 75.2-98.4% in relative humidity, 19.3 in transpiration coefficient and 10.8-13.8 m/sec. in wind speed. Yield reduction was 26-27% and 10∼17%, respectively, when the glume discoloration rates were 63.2-65.7% and 38.3-45.2%, obviously due to the decrease in percent of fertile grain and ripening ratio. Weather conditions during continuous rain for 7 days were 96% in relative humidity, 18.9℃ in average temperature, 21.9℃ in maximum temperature, and 16.8℃ in minimum temperature, causing the most viviparous germination in Juanbyeo(45.5%), followed by Jinbubyeo(14.5%), Bongkwangbyeo(14.2%), and Obongbyeo(12.6%). Lateral tillers started to occur when the submergence at the depth of 1.5-2 m lasted one day during the reproductive growth stage. The submergence for 2-3 days at 3-4 m of water depth induced 269-571 lateral tillers/㎡, supporting 32-52% of the total yield. The rice yield in the paddy fields which were left under the lodging conditions until harvesting was not different compared to that of the paddy fields which were kept upright by tieing them together after lodging, but perfect grain ratio decreased about 9.1% in the transplanting culture and 12.5% in the direct seeding culture on dry paddy field because of the increase in immature grains.
연구논문 : 미국인의 김치와 김치이용음식에 대한 인식과 기호도 -Illinois주와 California주-
한재숙 ( Jae Sook Han ),한경필 ( Gyeong Phil Han ),이진식 ( Jin Shik Lee ),한갑조 ( Gab Jo Han ),김영진 ( Young Jin Kim ) 한국식생활문화학회 2010 韓國食生活文化學會誌 Vol.25 No.5
The purpose of this study was to investigate American`s perception and preference for Korean kimchi. A questionnaire was used to examine the perceptions of 126 males (40.4%) and 186 females (59.6%) residing in Illinois and California. Approximately 68% of the respondents had eaten Korean food. The perception of kimchi was the highest with a mean of 3.62. The respondents felt that the "Kimchi is a good side dish with cooked rice", "Kimchi (with garlic) prevents SARS", which was significantly different (M=3.06, p< .001), and "Kimchi prevents adult diseases" (M=3.24, p< .01). When evaluating the different kinds of kimchi, onion juice kimchi had the most preferred taste and also the highest overall acceptability (M=5.50, p< .05) of the second days. In the sensory evaluation by kimchi use, the best taste (p< .001) was in the order of kimchi pizza (M=6.58), kimchi dumplings (M=6.40), and kimchi chicken a`laking (M=6.33). The order for overall acceptability (p< .001) was kimchi dumplings (M=6.30), kimchi pizza (M=6.25), kimchi bacon roll, kimchi fried rice, and kimchi chicken a`laking (M=6.17).
( Kyu-hyun Han ),( Jong-min Park ),( Migyeong Jeong ),( Young-min Han ),( Eun-jin Go ),( Juyeon Park ),( Hocheol Kim ),( Jae Gab Han ),( Oran Kwon ),( Ki Baik Hahm ) 대한간학회 2017 Gut and Liver Vol.11 No.5
Background/Aims: In inflammatory bowel disease (IBD), repeated bouts of remission and relapse occur in patients and can impose a risk of colitis-associated cancer. We hy-pothesized that plant extracts of Atractylodes macrocephala (AM) or Taraxacum herba (TH) may be better than sulfasala-zine for treating this disease because these extracts can promote additional regeneration. Methods: Murine intestinal epithelial IEC-6 cells were pretreated with AM or TH before a lipopolysaccharide (LPS)-induced challenge. Acute colitis was induced with 7 days of dextran sulfate sodium (DSS) in male C57BL/6 mice, and extracts of AM and TH were admin-istered for 2 weeks before DSS administration. Results: In vitro studies demonstrated that AM or TH treatment reduced LPS-induced COX-2 and tumor necrosis factor-α mRNA levels but increased heme oxygenase-1 (HO-1). Oral preadministra-tion of AM and TH rescued mice from DSS-induced colitis by inhibiting inflammatory mediators via inactivated extracel-lular signal regulated kinase and repressed nuclear factor κB and signal transducer and activator of transcription 3, but the effect was weaker for sulfasalazine than that for the extracts. Anti-inflammatory activities occurred via the inhibi-tion of macrophage and T lymphocyte infiltrations. Unlike sul-fasalazine, which did not induce HO-1, TH extracts afforded significant HO-1 induction. Conclusions: Because the AM or TH extracts were far superior in preventing DSS-induced colitis than sulfasalazine, AM or TH extracts can be consid-ered natural agents that can prevent IBD relapse. (Gut Liver 2017;11:655-666)