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김형철,심정보,조제황,Kim Hyeung-Cheol,Shim Jeong-Bo,Jo Je-Hwang 대한전자공학회 2005 電子工學會論文誌-SD (Semiconductor and devices) Vol.42 No.2
We propose the design method for the VLSI architecture of FNNPDS combined PDS(partial distance search) and FNNS(fast nearest neighbor search), which are used to fast encoding in vector quantization, and obtain the results that FNNPDS(fast nearest neighbor partial distance search) is faster method than the conventional methods by simulation. In simulations, we investigate timing diagrams described searching time of the nearest codevector for an input vector, and compare the average clock cycles per input vector for Lena and Peppers images. According to the result of simulations, the number of the clock cycle of FNNPDS was reduced to $79.2\%\~11.7\%$ as compared with the number using the conventional techniques. 벡터양자화에서 고속 인코딩에 사용되는 기존 방법인 PDS(partial distance search)와 FNNS(fast nearest neighbor search)를 결합한 FNNPDS(fast nearest neighbor partial distance search)를 VISI로 구현하기 위한 설계 방법을 제안하고, 모의실험을 통해 FNNPDS가 다른 방법에 비해 보다 고속화가 이루어짐을 입증한다. 모의실험 방법은 임의의 입력벡터에 대해 최단거리 부호벡터를 찾는 타이밍도를 고찰하고, Lena와 Peppers 영상에 대한 입력벡터당 평균 클럭 사이클을 비교한다. 모의실험 결과에 의하면 FNNPDS의 클럭 사이클 수는 다른 방법들보다 $79.2\%\~11.7\%$ 감소되었다.
삼귀용탕(蔘歸茸湯)이 정상 흰쥐 및 Streptozotocin으로 유도된 당뇨병 흰쥐의 혈당에 대한 영향
김형철 ( Hyeung Cheol Kim ),한효상 ( Hyo Sang Han ),이영종 ( Young Jong Lee ) 대한본초학회 2009 大韓本草學會誌 Vol.24 No.4
Objectives: In order to evaluate the effect of Samguiyong-tang (SGYT) on diabetes, we prepared two types of Samguiyong-tang (Type-Ⅰ and -Ⅱ) which was composed of three kinds of oriental drug such as Ginseng, Angelica gigantis radix and Deer antler. Type Ⅰ was traditional hot-water extract prepared from three kinds of drug, and Type Ⅱ was the mixture of ethanol-extract of ginseng and hot-water extract prepared from the other two drugs. Methods: We tested the effects of SGYT on the blood glucose levels in normal rats by the method of glucose tolerance test. And also examined the effects of SGYT on the levels in normal rats or diabetic rats induced by Streptozotocin during 20 days. Results: 1. In the course of oral glucose tolerance test, the blood glucose level decreased by administration of SGYT Ⅰ or Ⅱ in normal rats. 2. In the course administration of SGYT during 20 days in normal rats, the blood glucose levels decreased until day 4 by Type Ⅰ or Type Ⅱ, but thereafter the level was recovered to the normal. 3. In the course administration of SGYT during 20 days in the diabetic rats induced by streptozotocin, Type Ⅰ (SGYT) had some effect on the blood glucose levels only at 12 day, and Type Ⅱ (SGYT) decreased the levels from 6th day and so on, significantly. Conclusions: The results suggested that SGYT Ⅱ had some decreasing effects on the blood glucose levels in diabetic rats induced by Streptozotocin.
성철현(Cheol Hyeon Seong),한복수(Bock Soo Han),김형철(Hyeung Chul Kim),김기수(Ki Soo Kim),남궁석(Suk Namgung) 대한공업교육학회 1997 대한공업교육학회지 Vol.22 No.2
This paper deals with the turning system for the ultra-precision machining. The bed of the system has used the granite bed which has the thermal and vibrational characteristics superior to the cast iron bed for the common machine tool. To minimize the inner and outer vibration of the turning system, an air pad system was manufactured and tested. The aero-static spindle system which has the excellent rotation accuracy was designed and manufactured. As a result of the cutting test on aluminum alloy, the surface roughness was improved more than 3 times that of the conventional cutting. From the results, we think that this system can apply to the ultra-precision machining of soft materials such as aluminum alloy and copper.
안근성 중증근무력증이 동반된 갑상선 기능항진증의 임상상
유재명,박성우,유형준,임성희,김두만,최문기,김현규,최철수,서지영,김형철,송홍기,김덕환 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4
Myasthenia gravis is an autoimmune disease characterized by impaired neuromuscular transmission due to circulating antiacetylcholine receptor autoantibodies. The relation between myasthenia gravis and thyroid disease remains unclarified. The association is thought to be uncommon and approximately 0.2% of myasthenia gravis has been reported in patients with autoimmune thyroid disease. Clinical expression of myasthenia gravis varies, ranging from a mild localized disease such as ocular myasthenia gravis (OMG) to a severe generalized disease. A higher frequency of thyroid antibodies has been observed in OMG compared to generalized myasthenia gravis, but the exact mechanisms of this increased association between OMG and thyroid autoimmunity has not been confirmed. The $quot;see-saw$quot; relationship between hyperthyroidism and myasthenia gravis is presented by some authors, while others reported that the optimal maintenance of euthyroid status was essential in treatment. Today many authors agree to the latter and we think that the adequate control of hyperthyroidism is more important. We have experienced six cases of hyperthyroidism combined with OMG and it was somewhat difficult to diagnose myasthenia gravis when the patient have Graves ophthalmopathy (J Kor Soc Endocrinol 15:606-613, 2000).