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한재권,이행수,홍성용 충남대학교 산업기술연구소 2005 산업기술연구논문집 Vol.20 No.1
This paper presents a tunable filter that can be used in front stage of UWB receiver operating under 2GHz frequency range. It presents the optimum design method of comb-line structure tunable filter keeping the fixed bandwidth and attenuation characteristic in the tunable frequency range. This filter is implemented by applying a tunable capacitor, obtained by reverse-biased varactor diode, to a capacitor used in SIR structure. As a result of tunable filter measurement, the center frequency was little moved down. Its bandwidth was almost corresponded with the result of a simulation but did not meet the given 100MHz bandwidth.
근골격계 질환 예방을 위한 재생타이어 트레드 버핑작업 개선에 관한 연구
김재열,한재호,이연신,김항우,오성민,송경석 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
As a part of environmental pollution prevention and resources recycling, the regeneration of waste tire has been largely contributed to national industry. But, the worker has been evaded this regeneration process by reason of the best mischievous process condition among 3D industries.So, the first, the process condition of regeneratingwaste tire was analyzed. The second, the equipment or system was developed for the improvement of working strength and environment. The last, researchers intend to solve these problems
근골격계 질환 예방을 위한 재생타이어 트레드 버핑머신 개발
김재열,한재호,이연신,김항우,오성민 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
As a part of environmental pollution prevention and resources recycling, the regeneration of waste tire has been largely contributed to national industry. But, the worker has been evaded this regeneration process by reason of the best mischievous process condition among 3D industries.So, the first, the process condition of regeneratingwaste tire was analyzed. The second, the equipment or system was developed for the improvement of working strength and environment. The last, researchers intend to solve these problems
악성 점막하 종양과의 구별이 어려웠던 Gastritis Cystica Profunda 1예
선제형,박진석,한민석,김수항,김우진,박인형,이숭,유종선,박찬국 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3
Gastritis cystica profunda (GCP) is a rare disease characterized by gastric foveolae elongation along with hyperplasia and cystic dilatation of the gastric glands extending into the tissue beneath the submucosa. GCP mainly develops at the gastroenterostomy stoma but can arise in a stomach that has not undergone surgery. The proposed pathogenesis is related to chronic inflammation, ischemia and the presence of a foreign body. GCP may present as a submucosal tumor, Polyp or a giant gastric mucosal fold. Endoscopic ultrasonography (EUS) is an effective diagnostic method for differentiating GCP from protruding and elevated gastric lesions. We report a case of GCP along with the endoscopic and EUS findings that were indistinguishable from a malignant submucosal tumor.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
곰쓸개 복용 후 발생한 육안적 혈뇨와 신유두부 괴사증 1예
김우진,한민석,김수항,박인형,박진석,선제형,홍세인,박옥영,신정현,이숭,신병철 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3
Renal papillary necrosis occurs most commonly in association with urinary tract infection, diabetes mellitus, sickle cell disease, vascular disease, and analgesic nephropathy. Clinical presentation may be related to symptoms of pyelonephritis such as flank pain, renal colic, hematuria, Proteinuria, recurrent fever. The necrotic tissue may be sloughed off, and the diagnosis can sometimes be made by finding piece of renal medullary tissue in the urine. Pyelography may demonstrate cavities and sinuses in the resion of papillae. Anuria & oliguria can lead to the acute renal failure, and especially prognosis and progress may be affect influenced by urinary infection. We report a case of renal papillary necrosis with ingestion of bear gallbladder. On pyelography, Persistent contrast is diagnostic clue of renal papillary necrosis. This case is not be related to urinary tract infection, but occurred acute renal failure. Expectant treatment was gone.
유전자 알고리즘과 신경회로망을 이용한 고속 확관기의 확관속도 최적화
정원지,김재량,김진한,홍대선,강흥식,김동성 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.2
This paper presents the optimization of expanding velocity for tube expanding process in the manufacturing of a heat exchanger. In specific, the expanding velocity has a great influence on the performance of a heat exchanger because it is a key variable determining the quantity of tube expanding at assembly stage as well as a key parameter determining overall production rate. The simulation showed that the genetic algorithm used in this paper resulted in the optimal tube expanding velocity by performing the following series of iteration; the generation of arbitrary population for tube expanding parameters, consequently the generation of tube expanding velocities, the evaluation of tube expanding quantity using the pre-trained data of plastic deformation by means of a neural network, and finally the generation of next population using a penalty function and a Roulette wheel method.
EGDA 기능성 모노마로 희석된 Epoxy Acrylate의 전자빔 경화 및 코팅
조병기,윤경용,Petrov, S.E.,이재민,이정희,한도흥 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1
Electron beam curing of acrylated epoxy resin diluted with mono-functional monomer EGDA has been investigated under circumstances contacted with air and without air. The formulated resin in contact with N2 or covered with film could be cured up to 95% even with low dose of 5kGy and the surface of cured resin became very hard, but cured resin in existence of oxygen and without any additive had a low degree of curing and the surface became sticky due to insufficient curing. Additives such as curing agent P-115 or initiator BPO could increase the degree of curing to more or less one, but these additives could not remove completely surface stickiness. While, at high dose(more than 100kGy), addition of BPO were possible to make the irradiated surface of the resin be non-sticky even in existence of air. Degree of curing of the resin which contained pigment was very high at dose of around 20kGy. Elongation and stress at break on the cured resin with ferric oxide pigment were be higher than with non-ferric oxide pigment. Adhesion and anti-firing of the resin coated on cement block could be excellent.
Hung Sun Koh, Kyung Hee Jang, Eui Dong Han, Jae Eun Jo, Seon Ki Jeong, Eui Jeong Ham, Seong Taek In, Jong Hyek Lee, Gu Hee Kweon, Kwang Seon Kim 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.2
To identify subspecies and stocks of minke whale meats purchased from Korean markets during 2005-2007, we first obtained their complete sequences of mitochondrial DNA cytochrome b and control region sequences, and compared these sequences to the corresponding sequences of the common minke whale (Balaenoptera acutorostrata), obtained from GenBank. From analyses with partial cytochrome b sequences (383 bp) and non-coding, partial control region sequences (463 bp), Korean mink whale meats are identified as products from the North Pacific minke whale (B. a. scammoni). In addition, the sequences of the partial control region from these meats showed G at site no. 298 and G or A at site no. 463, and the meats appeared to originate from the J stock within this subspecies. Thus, because the J stock has been protected since 1986, implementation of strict regulation measures to reduce their accidental fisheries by catch seems urgent. In addition, B. a. scammoni is distinct from B. a. acutorostrata, with an average Jukes-Cantor distance of 2.21% in the complete control region sequence analysis (935 bp) and 1.31% in the complete cytochrome b gene sequence analysis; the current results support the current subspecies classification, although further sequencing analyses with nuclear genes are necessary.