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합성 Mellin Radial Harmonic필터를 이용한 위치 및 크기불변 물체인식
하영호,신현삼,김성용,김수중 경북대학교 전자기술연구소 1990 電子技術硏究誌 Vol.11 No.1
The proposed composite MRH(Mellin radial harmonic) filter, which is derived from a single MRH with shift- and scale- invariance. even recognizes the objects of scaled and/or similar shapes. The proposed composite MRH filter also can recognize inputs with the additive with nonzero mean gaussian noises by constant correlation threshold. Since the composite MRH filter is realized by CGH(computer- generated- hologram) which has amplitude and phase informations of the object. The light efficiency of this CGH filter is as high as the Wai-Hon-Lee CGH filter, which has only phase informations of the object.
하영호,이종원 대한기계학회 1994 大韓機械學會誌 Vol.34 No.10
이 글에서는 마그네틱 베어링의 일반적인 특성, 국내외의 연구동향 및 응용추세, 능동형 마그네틱 베어링의 각종 제어 방법에 대하여 기술하였다. 특히 능동형 마그네틱 베어링은 부하능력이 크고 신회도가 높을 뿐만 아니라 상황감시 및 진단 기능과 상황 적응기능을 갖는 지능형 마그 네틱 베어링으로도 이용될 수 있기 때문에 응용 분야가 확대되고 있고 일부 제품은 이미 실용 화되었다. 앞으로 마그네틱 베어링의 고성능화, 소형화, 생산 및 운용 비용 절감을 위한 연구와 특정한 분야에의 응용을 위한 연구가 국내외에서 활발히 진행될 것으로 예상된다.
교번 간축 알고리즘에 기반한 움직임 추정기의 VLSI 설계에 관한 연구
하영호,정해관,홍춘표 대한전자공학회 1996 CAD 및 VLSI 설계연구회지 Vol.5 No.1
A VLSI architecture of the block matching algorithm based on the alternative subsampling method for the motion estimation is proposed. The alternative subsampling method reduces the computational complexity by alternatively subsampling the number of pixels within the Mocks used to estimate motion vectors, whereas conventional non-exhaustive search methods limit the number of locations searched. The proposed architecture use half number of PEs (processing elements) and achieves approximately 1.6 times of speedup compared to Yang's one. Simulation results show that the performance of block matching algorithm based on tile alternative subsampling is very close to full search algorithm,
河永昊 慶北大學校 醫科大學 1970 慶北醫大誌 Vol.11 No.2
The direct effect of histamine on renal function in anesthesized dogs were studied. Mongoral dogs weighing 10∼12㎏ were anesthetized with 30㎎/㎏ of pentobarbital sodium. The right femoral artery and vein were cannulated with polyetylene tubing to facilitate withdrowal of blood samples and infusion of fluids, respectively. Both ureters were cannulated with polyethylene tubing and urine from the right and left kidneys was collected separately. The right kidney served as a control. Into the left renal artery a 22-gauge needle was introduced for histamine administration. The animals were hydrated, intravenously, by a sustaining infusion of 0.9% saline, containing 0.2% of inulin so that the rate of glomerular filtratin could be estimated, at the rate of 0.3ml/㎏/min. Para-aminohippuric acid (PAH) (0.4㎎/㎏/min) was added to the latter of infusion so that the rate of renal plasma flow could be estimated. The urine were colleted from the period of 90minute after initiation of infusion of saline. In this studies the dogs were divided into six groups, consistion of five dogs each, according to dose and drugs used. GROUP 1. (control): 0.9per cent NaCl solution were infused into left renal artery, GROUP 2. (histamine 0.1 ug group): histamine 0.1 ug/㎏/min. were infused. GROUP 3. (histamine 0.5 ug group): histamine 0.5 ug/㎏/min. were infused. GROUP 4. (histamine 1.0 ug group): histamine 1.0 ug/㎏/min. were infused. GROUP 5. (histamine 1.5 ug group): histamine 1.5 ug/㎏/min. were infused. GROUP 6. (histamine+Furosemide group) histamine 0.5 ug/㎏/min with furosemide 10ug/㎏/min. were infused. Histamine in normal saline solution were infused into the left renal artery and comparison of urinary output, renal plasma flow (RPF), glomerular filtration rate (GHR), urinary sodium and potassium of both kidney were made. The results obtain in this study were as follows: 1) In histamine 0.1 ug group, urinary output, renal plasma flow (RPF), glomerular filtration rate (GFR) urinary sodium and potassium were increased slightly, but in the groups of histamine 0.5 ug and 1,0 ug increased markedly on the histamine injected side. 2) In histamine 1.5 ug group. urinary output, RPF, urinary sodium and potassium of histamineinjected side were increased markedly, but these of the other side were decreased only slightly. 3) In histamine+Furosemide group urinary output, RPF, GFR, urinary sodium and potassium of the injected kidney were increased and those diuretic action of furosemide and histamine shows additive.
하영호,Ha, Yeong-Ho 한국방위산업진흥회 1990 國防과 技術 Vol.- No.136
재래식 총은 발사체의 속도가 너무 낮기 때문에 이동하는 목표물에 대한 명중률이 낮으므로, 현대전은 발사체 속도를 높이기를 요구한다. 이 문제는 대공화기에서 특히 절실하며, 그것은 공격하는 비행체의 속도와 고도 증가에 보조를 맞추지 못해 왔기 때문이다. 또한 실제적인 표적거동에 대하여 조준점과 탄착점과의 오차 거리는 비행시간의 제곱에 좌우되므로, 전자기 총은 사격제어 오차의 영향을 80-90%까지 감소시킬수 있다. 종말탄도 조건은 장갑두께가 변할 때 변하므로 대장갑 교전에서는 균일장갑에만 해당되나, 그럼에도 불구하고 대장갑 교전에서 장점이 기대된다