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A VLSI Architecture for the Alternative Subsampling Based Block Matching Algorithm
하영호,최진수,정해관,Chun Pyo Hong 대한전자공학회 1994 ISPACS:Intelligent Signal Processing and Communica Vol.1 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 subsampling the number of pixels used to estimate motion vectors, whereas conventional methods limit the number of locations searched. Simulation results show that the performance of this method is very close to full search algorithm. For subsampling factor of N, this approach can achieve approximately N/2 times of calculation with additional small overhead associated with address generator and temporary buffer. In addition, this architecture has about a half silicon area compared to Yang's architecture.
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,
Ha, Man-Yeong,Jeon, Chung-Hwan,Park, Doo-Seong,Park, Hae-Jin The Korean Society of Mechanical Engineers 2003 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.17 No.10
We investigate the triboelectrostatic separation of polyvinylchloride (PVC) from mixed plastics in the laboratory scale triboelectrostatic separation system. The flow and electric fields in the precipitator are obtained from the numerical solution of finite volume method. Using these flow and electric fields, we solved the particle motion equation considering the inertia, drag, gravity and electrostatic forces acted on the particles. The particle trajectories are obtained using a Lagrangian method as a function of different important variables such as Reynolds number, Stokes number, electrostatic force, electric charge and electric field distribution, inclined angle of plane electrodes, particle rebounding, particle charge decay rate after impact on the electrode surface, etc., in order to determine the optimal design conditions. The present predicted results for the cumulative yield represent well the experimental ones.
Risk factors in the progression of BK virus-associated nephropathy in renal transplant recipients
( Hae Min Lee ),( In Ae Jang ),( Dongjae Lee ),( Eun Jin Kang ),( Bum Soon Choi ),( Cheol Whee Park ),( Yeong Jin Choi ),( Chul Woo Yang ),( Yong Soo Kim ),( Byung Ha Chung ) 대한내과학회 2015 The Korean Journal of Internal Medicine Vol.30 No.6
Background/Aims: BK virus-associated nephropathy (BKVAN) is an important cause of allograft dysfunction in kidney transplant recipients. It has an unfavorable clinical course, and no definite treatment guidelines have yet been established. Here, we report our center’s experience with biopsy-proven BKVAN and investigate factors associated with its progression. Methods: From January 2004 to April 2013, 25 patients with BKVAN were diagnosed by biopsy at Seoul St. Mary’s Hospital. Of the 25 patients, 10 were deceased-donor transplant recipients and 15 were living-donor transplant recipients. Three of the patients underwent retransplantation. The primary immunosuppressant used was tacrolimus in 17 patients and cyclosporine in eight patients. Results: BKVAN was observed at a mean duration of 22.8 ± 29.1 months after transplantation. The mean serum creatinine level at biopsy was 2.2 ± 0.7 mg/dL. BKVAN occurred with acute rejection in eight patients (28%). Immunosuppression modification was performed in 21 patients (84%). Additionally, leflunomide and intravenous immunoglobulin were administered to 13 patients (52%) and two (8%), respectively. Allograft loss occurred in five patients (27.8%) during the follow- up period at 0.7, 17.1, 21.8, 39.8, and 41.5 months after the BKVAN diagnosis. Advanced stages of BKVAN, increased creatinine levels, and accompanying acute rejection at the time of BKVAN diagnosis increased the risk of allograft failure. Conclusions: The clinical outcomes in patients with biopsy-proven BKVAN were unfavorable in the present study, especially in patients with advanced-stage BKVAN, poor renal function, and acute allograft rejection.
( Eun Ha Kang ),( Jung Tae Lee ),( Hyo Jeong Lee ),( Joo Youn Lee ),( Sung Hae Chang ),( Hyun Jung Cho ),( Byoong Yong Choi ),( You Jung Ha ),( Kyoung Un Park ),( Yeong Wook Song ),( Yun Jong Lee ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Objectives: To examine the associations between chronic periodontitis (CP) and ankylosing spondylitis (AS) or between CP and clinical features of AS, and the effect of anti-TNFa therapy on periodontal treatment in Korean patients with AS. Methods: 84 AS patients and 84 age- and sex-matched healthy controls were enrolled. Clinical manifestations, disease activity and mobility parameters of AS, and periodontal parameters including probing pocket depth (PPD), clinical attachment loss (CAL), plaque index (PI), bleeding on probing (BOP) were assessed at baseline. Those with 4mm=PPD<7 mm on any tooth site had additional examinations at weeks 12 or 24 after periodontal treatment. Potential risk factors for CP including P. gingivalis infection were sought and adjusted. Results: No associations were found between CP and AS or clinical phenotypes of AS. No difference was found in PPD, CAL, PI, BOP, P. gingivalis carrier frequencies, or anti-P. gingivalis titers between patients and controls at baseline. No correlation was found between disease activities and periodontal parameters. However, those with CP showed decreased chest expansion and increased BASMI scores in univariate analysis with the latter being signifi cant in multivariate analysis. Both patients and controls showed improvement in PPD and CAL after periodontal treatment, irrespective of anti-TNFa therapy. The improvement was independently associated with AS group, P. gingivalis carriage, and baseline PPD>2. 6 mm. Conclusions: we could neither fi nd any association between CP and AS nor any correlation between disease activities and periodontal parameters. CP was not associated with any clinical phenotypes of AS, except for decreased mobility. Periodontal parameters improved after treatment in both patients and controls but more frequently in patients. Anti-TNFa therapy was not harmful to AS patients who had conservative periodontal treatment.
정해권(Hae-Kwon Jeong),하만영(Man-Yeong Ha),김경천(Kyung-Chun Kim),전충환(Chung-Hwan Jeon),최호진(Ho-Jin Choi),주재천(Jae-Chun Joo),문정만(Jeong-Man Mun),황성기(Seong-Ki Hwang) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
According to the development of the economy and to the improvement in life quality, it is increased for the desire for the comfortable circumstance in the underground subway station. And recently, an accident, fire, suicide and so on have been risen. An advanced countries have introduced PSD, and they satisfies with the effect of PSD. The optimum design standard to set up PSD have to satisfy the by train wind beyond the maximum static pressure. This paper includes the maximum static pressure what can be applied to the PSD installation design.