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부상특성 향상을 위한 극소 공기윤활막을 지닌 헤드 슬라이더의 형상 최적 설계
강태식,최동훈,정태건,박노열,이성창,Gang, Tae-Sik,Choe, Dong-Hun,Jeong, Tae-Geon,Park, No-Yeol,Lee, Seong-Chang 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.4
Flying attitudes of the slider, which are flying height, pitch and roll, are affected by the air flow velocity, the skew angle, and the manufacturing tolerances. Traditional designs of the air bearing surface have considered only the flying performances for the variations in the air flow velocity and the skew angle, which are determined by the radial position. In this study, we present the new shape design of the air bearing surface by considering the track seek performance and the air bearing stiffness as well as the traditional design requirements. The optimization technique is used to improve the dynamic characteristics and operating performance of the newly proposed air bearing surface shape design further. The optimized configuration is obtained automatically and the optimally designed sliders show the enhanced flying and dynamic characteristics.
섭동법을 이용한 공기윤활 슬라이더 베어링의 동특성 해석
강태식,최동훈,정태건,Gang, Tae-Sik,Choe, Dong-Hun,Jeong, Tae-Geon 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.6
This study presents a method for determining bearing stiffness and damping coefficients of air-lubricated slider bearing, and shows influences of air-bearing surface geometry(recess depth, crown an d pivot location) on flying attitude and dynamic characteristics. To derive the dynamic lubrication equation, the perturbation method is applied to the generalized lubrication equation which based on linearized Boltzmann equation. The generalized lubrication equation and the dynamic lubrication equation are converted to a control volume formulation, and then, the static and dynamic pressure distributions are calculated by finite difference method. The recess depth and crown of the slider show significantly influence on flying attitude and dynamic characteristics comparing with those of pivot location.
자연산 산삼 증류약침의 혈맥주입 전.후 혈장의 Proteom 분석
강태식,이선구,권기록,Kang, Tae-Sik,Lee, Sun-Gu,Kwon, Ki-Rok 대한약침학회 2004 Journal of pharmacopuncture Vol.7 No.3
Objectives : To observe changes in the serum proteins before and after intravenous injection of wild ginseng herbal acupuncture. Methods : Blood was collected before and after the administration of wild ginseng herbal acupuncture and only the serum was centrifuged. Then differences in the spots on the scanned image after running 2-Dimensionl electrophoresis were located and conducted mass analysis and protein identification. Results : Following results were obtained from the comparative analysis of serum proteins before and after the administration of wild ginseng herbal acupuncture. 1. 28 spots were identified before and after the administration. 2. In confirming manifestation degree, spots with more than two-times increase were 204, 803, 1505, 2205, 3105, 7104, 9001 spots, with more than one-time increase were 1101, 1302, 2013, 3009, 3010, 4002, 4009, 6706, 7103, 8006, 8101, and spots with decrease were 205, 801, 3205, 5202, 6105. 3. After conducting protein identification, proteins 205, 804, 1302, 4009, 6105, 6106 are unidentified yet, and 1101 is unnamed protein. Protein 204 is identified as complement receptor CR2-C3d, 801 as YAP1 protein, 803 as antitrypsin polymer, 1505 as PRO0684, 2013 and 3010 as proapolipoprotein, 2205 as USP48, 2403 as vitamin D binding protein, 3009 as complement component 4A preprotein, 3105 as immunoglobulin lambda chain, 3205 as transthyretin, 4002 as Ras-related protein Ral-A, 4204 as beta actin, 5202 and 7104 as apolipoprotein L1, 6704 as alpha 2 macroglobulin precursor, 7103 as complement component 3 precursor, 8006 as testis-specific protein Y, 8101 as Transferrin, 9001 as(Alpha-Oxy, Beta-(C112g)deoxy) T-State Human Hemoglobin, and 9003 as human hemoglobin. 4. Immune protein CR2-C3d, which acts against microbes and pathogenic organisms, and Antitrypsin(803), which is secreted with inflammatory response in the lungs, were increased by more than 200% after the administration of herbal acupuncture. 5. Immunoglobulin lambda chain(3105), Alpha-Oxy, Beta-(C112g)deoxy T-State Human Hemoglobin(9001), and human hemoglobin(9003) were increased by more than two-times after the administration of herbal acupuncture. 6. Proapolipoprotein(2013, 3010) and apolipoprotein(7104), key components of the HDL-cholesterol which plays an important role in preventing arteriosclerosis, were increased after the administration of herbal acupuncture. 7. Vitamin D binding protein(DBP, 2403), protecting the lung at the time of inflammatory response, was increased after the administration of herbal acupuncture. 8. Transthyretin(TTR, 3205), which is the main protein causing familial aimyloid polyneuropathy(FAP), was decreased after the administration of herbal acupuncture. 9. Ras-related protein Ral-A(4002) that controls phospholipid metabolism, cytoskeletal formation, and membrane traffic, was increased after the administration of herbal acupuncture. 10. Testis-specific protein Y(8006), which takes part in determination of the gender, was increased by more than two-times after the administration of herbal acupuncture. 11. Transferrin(8101), T-State Human Hemoblobin(9001), and Human Hemoblobin(9003) which balances the iron level in the body, were increased after the administration of herbal acupuncture. Conousion : Above results support the notion that intravenous injection of cultivated wild ginseng herbal acupuncture induce changes in serum proteins and this research can be a pioneer work in finding biomarkers.
자동차 연료펌프 날개깃 모양에 따른 소음변화의 실험적 연구
강태식(Tae Sik Gang) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Fuel pump generates rotation noise and blade pass Frequency noise. rotational noise calls low frequency noise and BPF noise calls High Frequency noise. We developed new Impeller that is closed type. closed type divide uniform distribution of blade and random distribution of blade. We can reduce to low Frequency noise change open type blade to closed type blade. We can reduce to High Frequency noise change uniform blade to random distribution blade. Closed type blade revolution to minute (PPM)is smaller than open type blade. That reason is Closed type blade's centrifugal force is less than open closed type blade. Also uniform distribution blade is generated concentrate Blade pass Frequency noise. So we changed blade uniform pattern to random. The Results BPF Noise is break up. Finally the noise is reduced than uniform blade pattern.
강태식(Tai Sik Gang),심재기(Jae Gi Sim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper developed LPLi (liquid phase LPG Injection) fuel. Until now LPG car has drived used to mixer and vaporizer. So LPG car always has problems back fire and when in the winter. LPG Car's Fuel consumption is rather than gasoline. But LPLi Fuel pump located in the fuel tank is directly injection in the engine. <br/> So Fuel consumption is better than LPG mixer system and result to reduced exhaust gas.<br/> LPLi car's fuel rail pressure is 5bar. Cause fuel pump has to operate the pressure. And 2 stage series connection for gasoline pump. All this while LPLi pump has developed is success include in basic function and normal temperature.