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Design and Implementation of a Massively Parallel Multithreaded Architecture: DAVRID
Sangho Ha,Junghwan Kim,Eunha Rho,Yoonhee Nah,Sangyong Han,Daejoon Hwang,Heunghwan Kim,Seungho Cho 한국정보과학회 1996 Journal of Electrical Engineering and Information Vol.1 No.2
MPAs(Massively Parallel Architectures) should address two fundamental issues for scalability: synchronization and communication latency. Dataflow architecture faces problems of excessive synchronization overhead and inefficient execution of sequential programs while they offer the ability to exploit massive parallelism inherent in programs. In contrast, MPAs. based on von Neumann computational model may suffer from inefficient synchronization mechanism and communication latency. DAVRID(DAtaflow/Von Neumann RISe hybrID) is a massively parallel multithreaded architecture which takes advantages of von Neumann and dataflow models. It has good single thread performance as well as tolerates synchronization and communication latency. In this paper, we describe the DAVRID architecture in detail and evaluate its performance through simulation runs over several benchmarks.
만성 주관 증후군에서 전기신경학적 진단 및 수술적 치료
황정수,어경윤,문상호,김욱년,하정호,김범,김영성,박소강 동국대학교 경주대학 2000 東國論集 Vol.19 No.-
The results of various treatments for ulnar neuropathy secondary to the chronic cubital tunnel syndrome are some controversial. A prospective study was done to determine the clinical and electrophysiological results of our surgical method which is composed of in situ release, medial epicondylectomy and nerve transposition onto the bony surface on where medial epicondyle was after smoothening. Clinical result was evaluated by scoring system which was made by Adelaar et al, and short segment stimulation test which were designed to localize the more discrete region at elbow. Latency and amplitude changes were determined by stimulating the ulnar nerve at 2㎝ intervals across the elbow. The four patients with chronic ulnar nerve palsy at the elbow level were selected. Average follow-up duration is 11.25 months and the patients had symptoms for an average of 33 months before surgery. All patients had good clinical scores and significant latency changes compared to preoperative nerve conduction studies. According to this study, we think that our operative method is a good treatment for chronic cubital tunnel syndrome.
Micro-sprinkler Irrigation Uniformity as Affected by Different Water Pressure and Outlet Intervals
Sangho Jeon,Seonah Hwang,Yeonkyu Sonn,Byungkeun Hyun,Woori Go,Sungang Yun,Kyunghwa Han 한국토양비료학회 2018 한국토양비료학회지 Vol.51 No.4
This study carried out to evaluate the water distribution uniformity of micro-sprinkler to improve water utilization efficiency. The water quantity and the water pressure were measured according to the spacing of micro-sprinkler and adjusting the applied water pressure. The results showed that the spacing of the micro-sprinklers a decisive influence on the distribution uniformity, but the change in hydraulic pressure did not have a significant effect. The water quantity was reduced by 22.7 ± 1.6 % when the water pressure dropped 100 kPa. Each micro-sprinkler has different spray pattern. The wetted radius was measured about 4 m. A peak was found within a meter radius from the center of the micro-sprinkler and gentle slope between 2 - 4 m. The appropriate spacing is 2 - 4 m depend on micro-sprinkler and purpose of the system. The results would be used in micro-sprinkler system guideline and design for best water distribution uniformity.
Large-Area Fabrication of Patterned ZnO-Nanowire Arrays Using Light Stamping Lithography
Hwang, Jae K.,Cho, Sangho,Seo, Eun K.,Myoung, Jae M.,Sung, Myung M. American Chemical Society 2009 ACS APPLIED MATERIALS & INTERFACES Vol.1 No.12
<P>We demonstrate selective adsorption and alignment of ZnO nanowires on patterned poly(dimethylsiloxane) (PDMS) thin layers with (aminopropyl)siloxane self-assembled monolayers (SAMs). Light stamping lithography (LSL) was used to prepare patterned PDMS thin layers as neutral passivation regions on Si substrates. (3-Aminopropyl)triethoxysilane-based SAMs were selectively formed only on regions exposing the silanol groups of the Si substrates. The patterned positively charged amino groups define and direct the selective adsorption of ZnO nanowires with negative surface charges in the protic solvent. This procedure can be adopted in automated printing machines that generate patterned ZnO-nanowire arrays on large-area substrates. To demonstrate its usefulness, the LSL method was applied to prepare ZnO-nanowire transistor arrays on 4-in. Si wafers.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2009/aamick.2009.1.issue-12/am900580v/production/images/medium/am-2009-00580v_0007.gif'></P>
Effects of Cu Content on Performance of Semi-Transparent Cu(In,Ga)Se₂ Solar Cells
Sangho Kim(김상호),Ahreum Lee(이아름),Joo Hyung Park(박주형),Jinsu Yoo(유진수),Ara Cho(조아라),Donghyeop Shin(신동협),Inyoung Jeong(정인영),Inchan Hwang(황인찬),Kihwan Kim(김기환),Jun-sik Cho(조준식) 한국신재생에너지학회 2022 한국신재생에너지학회 학술대회논문집 Vol.2022 No.4
Choi, Sangho,Jeong, Hang Jin,Hwang, Kyu-Jam,Gill, Byoungchul,Ju, Young Ran,Lee, Yeong Seon,Lee, Jeongmin Allen Press, etc 2017 The American journal of tropical medicine and hygi Vol.97 No.1
<P><B>Abstract.</B></P><P>We investigated the 47-kDa outer membrane protein (OMP), which is a periplasmic serine protease and an antigenic major surface protein of <I>Orientia tsutsugamushi</I>, as a vaccine candidate. We developed a conventional subunit vaccine expressing recombinant 47-kDa OMP (rec47) and a DNA vaccine (p47). In mouse immunization experiments, intranasal immunization with rec47 alone or with rec47 plus heat-labile enterotoxin B subunit from <I>Escherichia coli</I> or plus cholera toxin (CT) as adjuvants induced a higher amount of rec47-specific antibodies than intramuscular immunization with p47 alone or with p47 plus pBOOST2-samIRF7/3 (pB) as adjuvant. Moreover, the combination of rec47 and CT induced a strong cellular immune response to 47-kDa OMP, as demonstrated by a spleen cell proliferation assay, and also induced Th1- and Th2-type cytokine production, as demonstrated by a cytokine enzyme-linked immunosorbent assay. Intranasal immunization with rec47 plus CT was the most effective method for the induction of humoral and cell-mediated immune responses. Furthermore, relatively strong protection against homologous <I>O. tsutsugamushi</I> strain Boryong challenge was observed in mice immunized with rec47 plus CT. Therefore, 47-kDa OMP is an attractive candidate for developing a prophylactic vaccine against scrub typhus by <I>O. tsutsugamushi</I> infection.</P>