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李炳華(Byeong-Hwa Lee),南赫(Hyuk Nam),李貞宗(Jeong-Jong Lee),方亮(Liang Fang),洪正杓(Jung-Pyo Hong),河承亨(Seung-Hyung Ha) 대한전기학회 2008 전기학회논문지 Vol.57 No.12
This paper deals with the cost reduction design of a single-phase line-start permanent magnet (LSPM) motor. Due to high cost of the permanent magnet (PM), cost reduction can be effectively achieved by reducing PM volume. Therefore, motor characteristics according to the PM volume are calculated by using d-q axis equivalent circuit analysis, and the characteristic map is made. In the characteristic map, maximum torque and efficiency are shown according to motor parameters such as back electromotive force (back emf) and inductances; back emf represents the PM volume. Minimum back emf and inductances satisfying output performance are determined in the characteristic map. Then, motor geometry based on the prototype motor is optimized to get the determined parameters using response surface methodology (RSM) and finite element method (FEM). Through the presented cost reduction design, total PM volume is reduced to 32% of prototype model.
이병화(Lee byeong-hwa) 아시아민족조형학회 2007 아시아민족조형학보 Vol.7 No.1
The purpose of this study was to examine websites for Hanstyle in an attempt to find out about the state of Hanstyle in e-market, to suggest how to boost Hanstyle industry, and to present some of future vision for that. After relevant websites were analyzed two years ago, online general shopping malls that ranked first to tenth by Rankey.com two years ago were checked to see whether or not Hanstyle stores and Hanstyle categories were included in them. And the same investigation was conducted again to figure out the present situation. As a result, it's found that most of the websites investigated were in the form of homepage, but the number of online shopping malls increased. Some of the websites provided customers with a chance to buy traditional Hanbok in a way to be similar to online shopping. Franchise stores for lending Hanbok appeared, and some of the sites offered wedding consulting services. In 2004, two of the general shopping malls contained Hanbok categories, and in 2006, every general shopping mall that numbered 10 were equipped with Hanbok categories. Among different kinds of Hanstyle, children's Hanbok was carried by the largest number of the shopping mall sites, which was followed by casual Hanbok, Hanstyle for lending and traditional one. In conclusion, Hanstyle started to make its way through online market, and companies tried to apply a variety of marketing strategies in order to publicize themselves and to attract online customers. But it should be noted here that what matters is making research on the online sale of traditional Hanbok, as tailor-made traditional Hanbok was still dominant in this market.
출혈성 복수가 합병된 Henoch-Schonlein 자반증
이병만 ( Byeong Mahn Lee ),정현철 ( Hyun Chul Jung ),방성조 ( Sung Jo Bang ),서호석 ( Ho Seok Suh ),최승원 ( Seung Won Choi ) 대한류마티스학회 2004 대한류마티스학회지 Vol.11 No.4
Henoch-Schonlein purpura (HSP) is a systemic vasculitis with IgA dominant immune complex deposits affecting small vessels in the skin, joint, gastrointestinal tract, and kidneys. Gastrointestinal symptoms are common and may precede the appearance of characteristic skin rash. These manifestations include abdominal pain, bleeding, bowel infarction, intussusception, or even, perforation. However, hemorrhagic ascites has been rarely described in patients with HSP. The pathophysiologic mechanism is presumably a vasculitis of the small vessels within the serosa. We report a 37-year-old man with HSP complicated by hemorrhagic ascites. Contrast CT of the abdomen showed extensive bowel wall thickening and ascites. A paracentesis yielded hemorrhagic fluid. These abdominal manifestations were improved after methylprednisolone pulse therapy.