한국형 틸팅열차의 소비전력 측정 및 분석

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.

비부착 긴장재의 응력산정을 위한 극한강도 설계식의 평가

임재형(Lim, Jae-Hyung),문정호(Moon, Jeong-Ho),이리형(Lee, Li-Hyung) 한국콘크리트학회 1999 콘크리트학회논문집 Vol.11 No.3

용융금속 이송용 전자기 펌프의 유동해석 및 실험

최재호(Jae Ho Choi),임효재(Hyo Jae Lim),김창업(Chang Eob Kim),권정태(Jung Tae Kwon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5

This study aims at analyzing the flow characteristics of the electromagnetic pump using a linear induction motor (LIM) for transferring molten metals. The flow characteristics of the pump are simulated by magnetohydrodynamic(MHD) program. In this system, the LIM is used for transferring molten metal by electromagnetic force. The molten metal is treated as the secondary part of the LIM. Since the LIM produces an electromagnetic force in the duct, the molten metal can flow from the furnace to the reservoir. The flow characteristics of the pump are analyzed using MHD program for magnetic field of 0.1[T] in duct. In order to prove the analysis, we made a prototype electromagnetic pump using LIM.

한국형 틸팅열차 운행 중 운전 모드에 따른 고조파 분석 및 평가에 관한 연구

강철(Chul Kang),임재찬(Jae-Chan Lim),허재선(Jae-Sun Huh),김재철(Jae-Chul Kim),이수길(Su-Gil Lee),한성호(Soung-Ho Han) 대한전기학회 2009 전기학회논문지 P Vol.58 No.4

Recently, the new Korean Tilting Train Express(TTX) which maintains a speed on the curve railway line is developed. Electric railways, including the TTX, have electrical problems that could bring about serious accidents. For such reasons, the electric railway's electrical problems, electrical harmonic and others, have been studied briskly. Thus, TTX's electrical problems also need leading studies because the new Korean TTX will operate earnestly in 2012. The results could be used hereafter diagnosis of it's components and train conditions. In the paper, electrical signals in TTX operation were measured to analyze electrical harmonic. In addition, after the electrical signals were measured to operating mode (coasting mode, acceleration mode and regenerative breaking mode) respectively in test section(Ho-nam line, Chung-buk line, Jung-ang line and Tae-baek line). The electrical harmonics considered operating modes triparted were analysed and evaluated.

제약업종 부산물 및 화장품 제조업 폐수처리오니 처리토양에 대한 유기화합물 및 Bioassay 분석 평가

임동규,이상범,이승환,남재작,나영은,권장식,권순익,소규호 한국환경농학회 2004 한국환경농학회지 Vol.23 No.4

본 연구는 퇴비원료로 지정된 제약업종 부산물(공정오니) 및 화장품 제조업 폐수처리오니를 퇴비로서 활용 가능성을 판단하기 위하여 기존의 일반성분이나 중금속 성분 분석 이외 유기성 화합물과 기타 여러 생물검정법 등을 활용하여 시용한 오니에 의한 토양 내 비료의 피해를 밝혀내고 이들의 평가방법을 확립하고자 포장시험을 수행하였다. 오니의 처리에 따른 HEM의 함량은 제약업종 오니2(PS2)와 화장품 오니(CS)처리가 각각 0.51, 1.10 mg/kg로 가장 높았고, PAHs의 함량은 제약업종 오니2(PS2) 처리에서 3,406.8 μg/kg로 가장 높았다. 토양에 서식하는 미소동물의 밀도변화는 생육 중기(7월 23일) 및 수확기(10월 1일) 모두 제약오니2 및 돈분 처리구에서 가장 높았으며, 기타 처리구는 차이가 없이 아주 낮았다. 오니의 처리에 따른 세균 및 사상균의 균수는 제약업종 오니2처리에서 각각 736, 909 cfu/g로 가장 많았고, 화장품 오니도 각각 440, 236 cfu/g으로 다른 처리에 비해 많은 경향을 보였다. 제약오니 및 화장품오니 처리시 우점세균은 무비, 돈분처리에 비해 일정한 경향이 없었으나 3요소 처리보다 다양한 세균이 검출되었다. 오니의 처리에 따른 우점사상균은 무처리에 비해 제약업종 오니3와 화장품 오니처리에서 형태적 특징이 다른 콜로니가 검출되었으나 다른 처리는 비슷한 경향으로 종류 간에 큰 차이는 보이지 않았다. Microcosm test를 통하여 오니 처리 후 3개월이 경과한 토양의 오염정도를 평가한 결과는 제약업종 오니3과 화장품 오니처리는 약간 영향을 받아서 80~90% 생존하였으나, 제약업종 오니1처리는 처리 2주(14일) 이후에는 급격히 생존율이 떨어져서 4주 이후에는 10%만 생존하였다. 그러나 6개월이 경과한 토양에서는 지렁이의 생존율은 제약업종 오니1처리만 약간 영향을 받은 것으로 보였으며 다른 처리들은 전혀 영향을 받지 않았던 것으로 조사되었다. 유기성 오니의 퇴비원료로 활용은 비료관리법의 비료공정 규격 중 퇴비의 비고란에 "퇴비의 원료로 사용 가능한 물질과 사용 불가능한 물질'(별표1)에서 "희비의 원료 중 사전 분석검토 후 사용 가능한 원료에 대한 지정요령'에는 유기물과 중금속(8성분) 함량(건물증)과 제조공정 등을 검토하여 지정하고 있으나, 지정된 원료가 과연 회비원료로 적합한지 잘 알 수 없으며 또한 앞으로 현재의 퇴비원료 규정을 변경할 필요가 있을 경우를 대비하여 희비원료의 적합성 여부를 판별할 수 있는 방법의 개발이 필요하다. 따라서 퇴비원료로 이미 지정('02. 12. 31)된 제약오니 및 화장품 오니를 과량으로 토양에 시용한 후 유해 유기화합물, 미소동물, 미생물 및 생물학적(지렁이) 유해성 검정방법의 도입 가능성을 평가하기 위하여 고추를 재배한 포장에서 비료의 피해시험을 실시한 결과 유해 유기화합물과 생물학적(지렁이) 유해성 검정방법은 앞으로 연구를 통해서 보완할 경우 상당히 활용 가능성이 있는 좋은 평가방법인 것으로 생각된다. This study was conducted to assessment organic compound and bioassay (density of inhabited animal, fluctuation of predominant fungi, and survival ratio of earthworm) for finding damage on red pepper by heavily amount application of sludges in soil, which was treated with 3 pharmaceutical byproducts and a cosmetic industry wastewater sludge as raw materials of compost, and for establishing estimation method. HEM contents in the soil treated with pharmaceutical byproducts sludge2 (PS2) and cosmetic sludge (CS) were 0.51, 1.10 mg/kg respectively. PAHs content of PS2 treatment in the soil was 3406.8 ug/kg on July 8. In abundance of soil faunas, the pharmaceutical byproducts sludge2 treatment was the most highest. The next was decreased in the order of pig manure (PM) and the cosmetic sludge treatment. However the other pharmaceutical sludge treatments were remarkably reduced populations of soil inhabited animals. In upland soil treated with organic sludges, the numbers of bacteria and fungi of the pharmaceutical sludge treatment were 736, 909 cfu/g and those of the cosmetic sludge treatment were 440, 236 cfu/g, respectively. The pharmaceutical sludge treatments and the cosmetic sludge treatment in identification of predominant bacteria were not any tendency to compare with non fertilizer and pig manure treatments, but they had diverse bacteria than NPK treatment. In microcosm tests, the survival of the tiger earthworm in five soil samples was hardly affected against the soil of PSI (20%) after three months treated in the upland. But after six months, survival of PSI was 80%. At present, raw material of compost was authorized by contents of organic matter, heavy metal (8 elements), and product processing according to "The specified gist on possible materials of using after analysis and investigation among raw materials of compost", however, for preparing to change regulation of raw material of compost and for considering to possibility of application, this study was conducted to investigate toxic organic compound and bioassay methods using inhabited animal, fungi, and earthworm without current regulation.

캐비테이션 손상에 미치는 기포 거동에 관한 연구

임우조,황재호 釜慶大學校 1996 釜慶大學校 論文集 Vol.1 No.2

Cavitation is a hydrodynamic phenomenon which results in the formation and collapse of vapour bubbles in a liquid. The stresses produced when the bubbles collapse are considerable and severe erosion may occur to any solids in the vicinity. Cavitation damage is common in ship propellers, pump impellers and in the lubricating or cooling liquids of a vibrating machine such as a diesel engine. Both rotating disc and venturi devices are used to produce cavitation in the laboratory but the most convenient and commonly used devices are based on ultrasonic transducers and there is now a considerable amount of information on the cavitation erosion of materials. In this study, cavitation damage was investigated by using the piezoelectric vibrator with 20 kHz, 24㎛ to cavity generation apparatus. In order to investigate the reliablity for the cavitation erosion-corrosion test apparatus, the cavitation bubble group of test water was carefully measured with respect to test time. The photographs of the cavitation regimes were taken with a high speed camera arrangement by which the cavitation phenomena were studied. It is worth noticing in the vibratory cavitation apparatus that the cavitation bubble group does not fluctuate with test time. The result was ascertained by high speed photographs, which indicated uniform cavitation bubble group with test time.

슬관절 내측부 인대 손상의 보존적 치료

임홍철,심재학,남혁우,왕준호,노영진 대한스포츠의학회 2000 대한스포츠의학회지 Vol.18 No.2

Purpose : The medial collateral ligament injury is the most common injury of the knee. Recently Non-operative treatment has been preferred than operative treatment and most of patients have satisfactory clinical results after non-operative treatment. But a few patients have continuous instability after non-operative treatment, so the purpose of this study is to fine out the cause of persistent symptom. Methods and Materlals : We performed a retrospective study of one hundred thirty seven patients with medial collateral ligament injury treated non-operative from January 1990 to December 1997. W divided patients into two groups: isolated medial collateral ligament injury (groupⅠ): medial collateral ligament injury with concomitant anterior cruciate ligament injury (groupⅡ) and we analysed MRI finding, valgus instability, and Lysholm knee score. Result : At the follow up, three of group Ⅰ, five of group Ⅱ had persistent grade Ⅲ valgus instability. In group Ⅰ, we could find two case of rupture of the proper of medial collateral ligament with inward inversion and one case of concomitant posteromedial compartment injury. We could find the proper rupture of medial collateral ligament with inversion inward in two patients, the injury of posteromedial compartment in one patient. Two patients of group Ⅱ with grade Ⅲ valgus instability had anterior instability with laxity of grafted tendon after anterior cruciate ligament reconstruction. Conclusion : Most of isolated injury of the medial collateral ligament heals wthout operative intervention. But in case of rupture of the proper portion of medial collateral ligament with inversion inward or concomitant injury of posteromedial compartment, we should consider the operative treatment of medial collateral ligament. In case of medial collateral ligament injury with anterior cruciate ligament, it would better to consider the delicate reconstruction of anterior cruciate ligament.

진행성 골화성 섬유 이형성증의 1예

임태영,조영신,정춘해,박유환,하상호,유재원 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.1

진행성 골화성 섬유 이형성증은 2 백만명 중에 1명 발생하는 매우 드문 유전질환이다. 저자들은 2차례의 외상후 심해진 진행성 섬유 이형성증환자에서 최근 다시 발생된 외상후 생긴 병변부위에 biphosphonate와 steroid 투여로 최근수상부위의 근육 골화와 경화를 현저한 호전을 보였으나, 기존의 골화가 이미 진행된 병변에서는 잘 반응하지 않음을 경험하였기에 문헌고찰과 함께 보고하는 바이다. Fibrodysplasia ossificans progressiva(FOP) is an extremely rare hereditary disorder characterised by progressive heterotopic ossification of the soft tissue. The resulting progressive immobilization of the limbs, jaw and chest wall generally leads to severe disability. We present an 20-rear-old man with advanced FOP. He had two operative interventions by prior traffic accident and recent biopsy. It resulted abnormal ossification. Treatment for this disorder is avoidance of exacerbating factors and medical strategies is biphosphonate and steroid. We observed the course of ossification and muscle atrophy during biphosphonate and steroid therapy in advanced FOP.

영역 특수적인 입장에서의 과학적 창의성에 대한 정의, 구성요인에 대한 탐색

임성만,양일호,임재근 경북대학교 과학교육연구소 2009 科學敎育硏究誌 Vol.33 No.1

본 연구는 창의성의 영역 특수적인 입장에서 과학적 창의성을 다룬 논문들을 내러티브 리뷰의 방법을 사용하여 탐색한 것이다. 창의성을 바라보는 2가지 입장 중에서 한 가지인 영역 특수적인 입장은 창의성에 대해 “그 아동이 얼마나 창의적인가?”라는 창의성의 일반적인 입장에서 “그 아동은 어느 영역에서 창의적인가”라는 영역 특수적인 접근방법으로 창의성을 바라보는 것이다. 이러한 관점에서 본 연구는 과학을 바라보았을 때, 과학적 창의성은 어떻게 정의될 수 있으며, 또 어떤 구성 요인들로 이루어졌는가를 탐색해 본 연구이다. 과학적 창의성 관련 논문들에 대한 리뷰를 통해 본 연구는 과학적 창의성은 과학적인 지식을 바탕으로 논리적이고 분석적인 사고를 통해 새롭고 적절한 것을 찾아내는 능력으로 정의할 수 있었으며, 과학적 창의성의 구성 요인은 정의적, 인지적, 환경적 요인으로 나눠 살펴본 결과, 영역 특수적인 관점에서 가장 두드러지게 차이를 보이는 과학적 창의성의 인지적 요인은 과학 관련 지식, 과학 탐구과정, 문제 발견력, 문제 해결력 등으로 구성되어짐을 알 수 있었다. 이러한 과학적 창의성에 대한 논의는 보다 과학적 창의성에 대한 실증적인 연구에 대한 좋은 길잡이가 될 것으로 사료된다. The purpose of this study is to identify a domain-specificity of the scientific creativity and the component of scientific creativity. Conducted from theoretical study, this study suggests that a domain-specific view of creativity offers a more useful and constructive components of scientific creativity based on the literature associated with the component of scientific creativity. Scientific creativity has a domain-specific component and so there is need to distinguish scientific creativity from creativity in general. As a result, scientific creativity is different from other creativity it is concerned with scientific knowledge, science process skill, creative scientific problem finding and solving and so on. And since scientific creativity is a kind of ability, it is possible to improve through a scientific creativity program.

배관의 캐비테이션 침식-부식 특성에 관한 연구

임우조,황재호,김윤곤 釜山水産大學校 1994 釜山水産大學 硏究報告 Vol.34 No.1

In this study, the steel pipe piping water(SSPW) and SPPW on weldment were tested by using of a cavitation erosion - corrosion test appartus with nozzle(water tunnel type) and were investigated under the marine environment of liquid. The main results obtained were as follows 1) The corrosion - erosion of weldment is more susceptible than that of base metal. 2) The weight loss rate of heat affected zone of weldment can be largely improved by the preheat, dry of base metal and electrode before welding. 3) The electrode potential becomes noble by the pre-heat, dry of base metal and electrode before welding, and the corrosion current density is decreased.