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임재찬(Jae-Chan Lim),김재철(Jae-Chul Kim),한성호(Soung-ho Han),이수길(Su-Gil Lee) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월
It’s essential to measure electrical signals of Korea tilting train ""Hanvit 200"" during operation, Because we neep to study operation characteristics of new electric train ""Hanvit 200"" and we want to develop diagnosis system of main circuit of Korea tilting train ""Hanvit 200"". So, we measure electrical signals for developing diagnosis system of ""Hanvit 200"" during operation. We measure voltage and current of the primary winding of main transformer and analyze them. In result, we know that each operation has specific waveform and frequency. In addition, we also measure are currents and are voltage and we know that arc of each situations has specific waveform of pattern.
임재찬(Jae-Chan Lim),김재철(Jae-Chul Kim),이희태(Hee-Tae Lee),김진석(Jin-Seok Kim),한성호(Soung-ho Han),이수길(Su-Gil Lee),이은규(Eun-Gyu Lee) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.11월
In this paper, measuring equipment for arcs which are caused by losing contact between a pantograph and a catenary in the electric train, TTX, was designed and we actually measured arcs of current and voltage at 2007. 5. 16 ~ 17, 2007. 5. 31, 2007. 6. 18 - 19 and 2007. 6. 30 ~ 31, a total of 4 times. The FFT tool was made by LabVIEW software and the actually measured arc data were analyzed by the FFT tool. The analysis result showed that the arc current and voltage contains much harmonic, so we must consider problems of EMS and EMI in the main circuit system of the electric train, TTX.
하이드로싸이클론을 이용한 생산수의 모래 제거 효율에 관한 연구
임재호(Jae-ho Lim),김동관(Dong-kwan Kim),장호길(Ho-gil Jang) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
This paper presents hydrocyclone parameters related to separation efficiency for produced water treatment process in off-shore as a de-sander. Separation technologies using hydrocyclones have being used in a variety of process industries for over 100 years. Hydrocyclones are also used in produced water treatment process because of their obvious advantages such as simple structure, large capacity, low cost and small volume. However, there are a bit researches about produced water treatment using hydrocyclones in off-shore fields in a domestic industry. Experiments about hydrocyclone parameters related to separation efficiency such as flow rate, length of vortex finder and pressure drop were conducted. Glass bead(less than 50㎛) was used instead of sand and its concentration was 500~1,000ppm in water. Oil concentration in water was maintained as about 2,000ppm. In result of experiments, separation efficiency and pressure drop were increased by increasing flow rate. When flow rate were increased from 40lpm to 100lpm, pressure drop was increased from 0.3bar to 1.7bar and separation efficiency was increased from 84% to 97%.
허재선(Jae-Sun Huh),강철(Chul Kang),임재찬(Jae-Chan Lim),김재철(Jae-Chul Kim),이수길(Su-Gil Lee),한성호(Seoung-Ho Han) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
Recently, the growth of electric railway system technology steadily keeps up in the Korea, and occupancy rate of electric railway system is increased as a transportation method. So, energy consumption of railway system is increasing. According to this reason, the many study of energy efficiency in the railway system are in progress. In this context, electric railway needs to measure and analyze electric power as drive states. And, drive states are classified into coasting state, acceleration state, and regenerative breaking state This paper focus on regenerative breaking state, and we descant through measured data of test driving of Tilting Train express
허재선(Jae-Sun Huh),강철(Chul Kang),임재찬(Jae-Chan Lim),김재철(Jae-Chul Kim),이수길(Su-Gil Lee),한성호(Seoung-Ho Han),이은규(Eun-Kyu Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Recently, the growth of electric railway technology steadily keep up in the korea, and occupancy rate of electric railway system increased as a transportation method so energy consumption of railway system is increasing. According to this reason, the many studys of energy consumption in the railway system are in progress. In this context, the TTX(Tilting Train eXpress) needs to measure and analyze energy consumption and regenerative energy. In this paper, because of driving of TTX in the Ho-Nam railroad and Jung-Ang railroad, consumpted and regenerated energy are measured. This measured data is classified and analyzed as driving mode.
아급성 편마비환자의 어깨관절 Scapular Taping적용이 근 활성도와 통증, 관절가동범위 및 고유수용성감각에 미치는 영향
이재남(Lee, Jae-Nam),임재길(Lim, Chae-Gil) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.11
본 연구는 뇌졸중으로 인한 아급성 편마비 환자의 견관절 거상 시 scapular taping 적용이 견갑골 상방 회전 근과 전 삼각근의 근 활성도와 통증, 관절가동범위, 그리고 고유수용성감각에 미치는 영향을 알아보기 위하여 실시하 였다. 28명을 대상으로 실험군과 대조군으로 나눠 테이핑 전과 후의 상승모근, 하승모근, 전거근 그리고 전 삼각근의 근 활 성도를 측정하였다. 그리고 견관절 관절가동범위와 통증, 고유수용성 감각을 측정하였다. 실험결과 근 활성도는 하승 모근과 전거근에서 scapular taping 적용 시 유의하게 증가하였으며(p<0.05), 관절가동범위는 유의한 차이가 있었다 (p<0.05). 그러나 통증과 고유수용성 감각은 유의한 차이가 없었다(p>0.05). 본 연구 결과 견관절을 거상하는 동안 아 급성편마비 환자들에게 적용한 scapular taping은 견갑골 상방회전근의 근 활성도를 증가시키고 관절가동범위를 증가 시키는데 부가적인 치료 방법으로 활용될 수 있을 것이다. The purpose of this study was to determine the effects of scapular taping on muscle activities of the scapular rotators and anterior deltoid, ROM, shoulder pain, proprioception in subacute stroke patients. Twenty-eight patients were randomly assigned to an experimental and control groups of fourteen patients respectively. Muscle activity of upper and lower trapezius, serratus anterior, anterior deltoid was measured using surface electromyography. Visual analog scale was used for shoulder pain. Electro-Goniometry was used for shoulder elevation ROM. Assessment board was used for shoulder elevation proprioception. The muscle activity of the lower trapezius and serratus anterior increased significantly after scapular tape application (p<0.05). The AROM and PROM in the shoulder elevation significantly increased after scapular tape application (p<0.05). The VAS in the shoulder no significantly decreased after scapular tape application (p>0.05). The proprioception in the shoulder no significantly increased after scapular tape application (p>0.05). The results of this study suggest that scapular taping can be used an additional therapy for increasing muscle activity of lower trapezius and serratus anterior and ROM during shoulder elevation in subacute stroke patients.
이일희,김광욱,임재관,권선길,유재형 ( Eil Hee Lee,Kwang Wook Kim,Jae Gwan Lim,Seon Gil Kwon,Jae Hyung Yoo ) 한국공업화학회 1998 공업화학 Vol.9 No.2
본 연구에서는 19계 성분 원소들이 함유된 모의 방사성 용액으로부터 미량 잔존하고 있는 U을 분리하기 위한 최적 조건 설정 및 연속공정으로의 최적화하기 구성을 최적화하기 위한 공정 평가를 수행하였다. 실험은 TBP에 의한 용매추출 공정을 선정하여 총 18단 2조의 연속식 용매추출 장치인 혼합정치조를 이용하였다. U, Np, 및 Tc 의 추출율은 각각 99.2%, 32.1%, 및 99.9%이며, 기타 원소들은 1∼4% 정도가 추출되었다. U의 경우 다성분계 회분식에서 얻어진 Nd나 Fe와 같은 공존원소의 영향으로 인하여 U이 약 80% 정도만이 추출된다는 기존 보고를 능가하는 것으로, 이는 다단 연속추출 장치의 특성에 기인하는 것 같다. 그리고 Np의 추출을 감소는 질산용액에 존재하는 다양한 산화가 상태에 기인하며, Tc의 경우는 Tc과 공존하고 있는 Zr 또는 U과의 착물 형성에 의해 추출율이 증가된 것으로 사료된다. 한편 유기상으로 추출된 모든 원소들은 0.01M의 질산에 의해 99% 이상이 수용상으로 역추출되었다. 이상의 결과로부터 TBP에 의한 잔존 U 제거 공정은 별 문제가 없다. 다만 Np이 추잔상과 U 생성물로 각각 분배되어 있으므로 방사성 핵종의 확산방지 측면에서 이를 한 공정에서 총괄 처리할 수 있는 공정 개발이 요구된다. This study was carried out to find the optimal operating conditions for separation of residual uranium from the simulated radwaste solution containing 19 elements, and to evaluate the validity of the process. The selected process was based on the solvent extraction with TBP(tributyl phosphate). As an extractor, two miniature mixer-settlers with a total of 18 stages were used. Extraction yield of U, Np and Tc was about 99.2%, 32.1%, and 99.9%, respectively. The other elements were coextracted in the range of 1-4%. Extraction yield of U exceeded those of the previous work performed with batch system, which resulted in the low extractability of U (about 80%) according to the coexisting element such as Nd and Fe. It was due to the characteristics of multi-stage extractor. On the other hand, low extractability of Np was caused by various oxidation states in the nitric acid medium. In the case of Tc, its high extractability may be attributed to the complex formation with Zr and U, which is not well proved yet. All elements extracted with TBP were stripped into aqueous phase more than 99% by 0.01M HNO₃. From the results, this process has no problem with respect to the removal of nuclides with long half-life such as U, Np, and Tc. To prevent the diffusion of radioactive nuclide, however, overall separation of Np in the same step was required, because Np was distributed in the raffinate and U product, respectively.