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RISS 인기검색어
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- 저자 : Myung-Gyu CHOI (검색결과 641 건)
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김명석,최상돈,조상규,김정호,전헌무,김호일 慶北大學校 師範大學 科學敎育硏究所 1998 과학교육연구지 Vol.22 No.-
We review the contextuality of measured values in quantum mechanics from point of view of a conventional interpretation of quantum mechanics. We will, in particular, concentrate on Bell-KS theorem which, seemingly, disproved the existence of a hidden-variable interpretation of quantum mechanics. We introduce ways to accommodate the contextuality so that Bell-Ks theorem no longer holds and therefore the existence of a hidden-variable interpretation becomes possible.
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金允溟,朴圭喆,崔鍾云,朴宰煥 단국대학교 1992 論文集 Vol.26 No.-
In the RF gas discharge system the load varies frequently by the operational environment. And it is often necessary to change the matching network to provide the maximum possible power transfer from the oscillator to the RF load. An Rf oscillator whose variable operating frequency is between 20 and 30 MHz and whose output RF power is about 200 watts was designed to solve this problem. The conversion efficiency from the DC power was about 80% It is found that the output oscillating frequency which gives minimum RF reflections from the loads follows automatically to the changes of the load or of the operating conditions. It is also found that the output frequency decreases with the larger load shunt capacitance.
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3-Joint Planar Type 로봇 매니퓰레이터의 자기동조적응제어에 관한 연구
김규로,양희주,유용석,최명진,오택열 慶熙大學校 大學院 院友會 1996 高凰論集 Vol.17 No.-
This study has parallelogram trajectory tracking of Three Joint Planar type Robot Manipulator. The equation of motion for the three joint planar manipulator are obtained by substituting Lagrange's energy expression into Euler-Lagrange's equation and forming the appropriate derivative. Lagrangian method allows us to obtain the dynamics equations for very complicated systems in the simplest manner possible. SISO model is used for design of the controller. The design of controllers may be considered primary controller for manipulators to track the desired trajectory under ideal conditions and secondary controller to compensates for undesirable deviations of the motion from the trajectory caused by external and internal disturbances. The aim of this paper is to evaluate the efficiency by self-tunning adaptive control and considering a characteristic of control. Through the computer simulation, obtained the following results 1) selt-tunning adaptive control is superior to PD control, 2) During the learning period, the adaptive control algorithm is searching proper estimates and controller gains. After this period, the outputs of the joints start tracking closely the desired valued.
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강신몽,이원태,고영창,최상규,김윤희,이홍석,서재관,윤중진,이혜경,최득린,김종열,윤창육,변명식,이장홍 大韓法醫學會 1991 대한법의학회지 Vol.15 No.2
Individual identification is an important part in medicolegal field especially in mass disaster. At July, 27, 1989, KAL KE-803 was crashed on landing at Tripoli International Airport, Liba. The plane was caught in fire and sixty eight Koreans were sacrified. The majority of victims were severely charred and injured. The authors examed all dead bodies and successfully identified all the cases through visual, anthropological, odontological, radiological and pathological methods including fingerprint and blood typing.
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( Myung Gyu Choi ),( Poong Lyul Rhee ),( Hyojin Park ),( Oh Young Lee ),( Kwang Jae Lee ),( Suck Chei Choi ),( Sang Young Seol ),( Hoon Jai Chun ),( Jong Sun Rew ),( Dong Ho Lee ),( Geun Am Song ),( H 대한소화기기능성질환·운동학회 2015 Journal of Neurogastroenterology and Motility (JNM Vol.21 No.3
Background/Aims: Therapies of functional dyspepsia (FD) are limited. DA-9701 is a novel prokinetic agent formulated with Pharbitis semen and Corydalis Tuber. We aimed to assess the efficacy of DA-9701 compared with itopride in FD patients. Methods: Patients with FD randomly received either itopride 50 mg or DA-9701 30 mg t.i.d after a 2-week baseline period. After 4 weeks of treatment, 2 primary efficacy endpoints were analyzed: the change from baseline in composite score of the 8 dyspeptic symptoms and the overall treatment effect. Impact on patients`` quality of life was assessed using the Nepean Dyspepsia Index (NDI) questionnaire. Results: We randomly assigned 464 patients with 455 having outcome data. The difference of the composite score change of the 8 symptoms between the 2 groups was 0.62, indicating that DA-9701 was not inferior to itopride. The overall treatment effect response rate was not different between the groups. When responder was defined as ≥ 5 of the 7 Likert scale, responder rates were 37% of DA-9701 and 36% of itopride group. Patients receiving DA-9701 experienced similar mean percentage of days with adequate relief during the 4-week treatment period compared with those receiving itopride (56.8% vs 59.1%). Both drugs increased the NDI score of 5 domains without any difference in change of the NDI score between the groups. The safety profile of both drugs was comparable. Conclusions: DA-9701 significantly improves symptoms in patients with FD. DA-9701 showed non-inferior efficacy to itopride with com - parable safety. (J Neurogastroenterol Motil 2015;21:414-422)
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Choi, Hyun Gyu,Choi, Yeon Ho,Kim, Ji Hyang,Kim, Hui-Hun,Kim, Sang-Hyun,Kim, Jeong Ah,Lee, Sang Myung,Na, MinKyun,Lee, Seung Ho 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.4
A new neolignan, linderin A (1), together with six known lignans, (+)-xanthoxyol (2), pluviatilol (3), actiforin (4), (+)-syringaresinol (5), (+)-(7S,8R,8'R)-acuminatolide (6), and (+)-9'-O-trans-feruloyl-5,5'-dimethoxylariciresinol (7) were isolated from the stems of Lindera obtusiloba Blume (Lauraceae). Their chemical structures were elucidated by a combination of spectroscopic analysis and chemical reaction, and the absolute configuration of 1 was determined by Mosher's esterification. The effect of compounds 1-7 on tumor necrosis factor (TNF)-${\alpha}$, interleukin(IL)-6, and their inhibitory activity of histamine release were examined using human mast cells. Among the lignans tested, compounds 1, 3, 4, 6, and 7 inhibited release of histamine from mast cells. Especially, compounds 1 and 4 suppressed the gene expressions of pro-inflammatory cytokines, TNF-${\alpha}$, and IL-6 in human mast cells. Our findings suggest that the lignan constituents in L. obtusiloba may contribute to its anti-allergic inflammatory effects.
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Choi, Hyung-Gyu,Choi, Hyun-Su,Choi, Young-Seok,Jung, Myung-Ok,Choi, Jung-Seok,Choi, Yang-Il Korean Society for Food Science of Animal Resource 2016 한국축산식품학회지 Vol.36 No.1
This study was conducted to investigate the effects of mixed bone and brisket meat on the quality characteristics and nutritional components of shank bone extract and rib extract from Hanwoo. The pH values were influenced by the raw bones, mixed bone, brisket meat and their interactions (p<0.05). The salinity, sugar content, turbidity, and essential amino acid values increased significantly with addition of mixed bone and brisket meat. All attributes of sensory evaluation score were the highest in T6 (Rib 500 g + Mixed bone 500 g + Brisket meat 400 g) (p<0.05). The mixed bone significantly increased the saturated fatty acids of shank bone extract (p<0.001). Thus, the addition of mixed bone and brisket meat had a positive effect on the quality and nutritional components in shank and rib extracts of Hanwoo cattle.
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