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RISS 인기검색어
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- 저자 : 김익수 ( Ik Soo Kim ) (검색결과 387 건)
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김익수,Kim, Ik-Soo 한국정보처리학회 1997 정보처리학회논문지 Vol.5 No.1
본 논문은 프로세서와 기억장치 모듈 사이에 다중의 연결경로를 갖는 가상병렬 다단계 상호 연결 네트워크에 대해 서술하고 있다. 제안된 가상병렬 MIN 네트워크는 입력 스위칭 블럭에 $m{\times}1$ 멀티플렉서와 출력 스위칭 블럭에 $1{\times}m$디멀티플렉서를 그 리고 logN-1 단의 스위칭단을 사용하여 프로세서와 기억장치 모듈 사이에 최대 $2{\times}m$개의 독립된 연결경로를 갖고 있다. MIN 네트워크는 다중의 중복된 연결경로를 갖고 있기 때문에 다수의 프로세서들은 동시에 서로 다른경로를 통해 특정의 출력포트에 연결될 수 있다. 또한 새로운 가상-병렬구조의 MIN 네트워크는 스위칭 블럭에서 패킷 충돌의 가능성을 줄일 수 있으며 제안된 MIN 네트워크를 Passthrough ratio, 신뢰도 와 가격의 측면에서 MBSF 구조의 MIN 네트워크와 비교하였다. 가상-병렬구조의 MIN 네트워크는 MBSF 구조의 MIN에 비해 성능이 개선되었으며 매우 간단한 구조로 이루어 졌음을 확인하였다. This paper presents a virtual-parallel multistage interconnection network (MIN) which provides multipath between processor and memory module. The proposed virtual-parallel MIN network which uses $m{\times}1$ mutiplexer at the input switching block, $1{\times}m$ demultiplexer at the output switching block and logN-1 switching stages has maximum $2{\times}m$ unique paths between processor and memory module. Because it has multi-redundance paths, a number of processors can connect a specific Also, this new virtual-parallel structured MIN network can reduce packet collision possibility at switching block and it has cost. It shown to improve a performance and to be a very simple structure in comparision with MBSF structured MIN.
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전북 부안의 좀구굴치 ( Micropercops swinhonis ) 개체군 생태
김익수,김병직 ( Ik Soo Kim,Byung Jik Kim ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.1
Population ecology of the freshwater goby, Micropercops swinhonis(Gu¨nther) was studied at the Ch`oˇngho reservoir of Puan-gun, Ch`oˇllabuk-do, Korea from January 1994 to July 1995. The usual habitat of this species is usually the sand and mud substrates where water plants are dense. 18 fish species in 10 families inhabit with M. swinhonis. The food items of M. swinhonis consist of copepods, cladocerans, chironomid larvae and young fishes eat also copepod larvae and rotifers. The mature group of about 30∼40 mm in total length is reached during one year. Spawning period is from April to May based on the gonadosomatic index of female and male. The number of mature ovarian eggs of an adult female is enumerated as 219∼958 and the size of ripe eggs is 0.64∼1.12mm in diameter.
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김익수,이은희 ( Ik Soo Kim,Eun Hee Lee ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.4
During the period from December in 1994 to January in 1995, the Korean endemic Cobitid fish, Niwaella multifasciata collected from the Kyongho River and Dukchon River which are tributaries of the Nakdong River, Sanchong-gun, Kyongsangnam-do, Korea. This report is a description of the gross morphology of the embryos and larvae up to the development of juvenile period of life. The eggs from the females were obtained by injecting gonadotropin and fertilized by dry method in the laboratory. Live, freshly laid eggs of this species were separative, demersal, reddish orange and average 1.8mm in diameter. The eggs began to hatch approximately about 142 hours after artificial fertilization at the water temperature of 10∼14℃. The newly hatched larvae were average 5.4mm in total length possessing yolk sac and 44∼46 myotomes. The hatched larvae showed high mortality and almost all larvae reached the adult stage. 2 days after hatching, the larvae attained average 7.1mm in total length, and were observed the melanophores at the side of the body at this time. 16days after hatchng, the larvae absorbed the yolk completely and became postlarvae. 85days after hatching, the larvae attained 17.3∼19.9mm in total length and entered the juvenile stage. All the fin rays were formed with complete set of fin rays; D.III, 6, A.III, 4, P. 9, V. 6, C.16. 110 days after hatching, the juvenile reached to 21.9∼24.6mm in total length, and the band patterns of them were very similar to those of the adult of Niwaella multifasciata.
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에어로졸 증착 공정을 통해 제작한 Al<sub>2</sub>O<sub>3</sub> 코팅층의 Al<sub>2</sub>O<sub>3</sub> 입자 크기에 따른 성막 메커니즘 연구
김익수,조명연,구상모,이동원,오종민,Kim, Ik-Soo,Cho, Myung-Yeon,Koo, Sang-Mo,Lee, Dong-Won,Oh, Jong-Min 한국전기전자재료학회 2020 전기전자재료학회논문지 Vol.33 No.3
Al<sub>2</sub>O<sub>3</sub> powders with particle sizes of 0.35 ㎛, 0.5 ㎛, 1.5 ㎛, and 2.5 ㎛ are deposited onto glass and Cu substrates using the aerosol deposition (AD) process. The deposition characteristics of Al<sub>2</sub>O<sub>3</sub> films using those four types of Al<sub>2</sub>O<sub>3</sub> powders are investigated to determine the influence of the particle size on the films. To observe detailed micro-structures of the films, the cross-section and surface morphology are observed. Then, the crystalline size and internal strain are calculated from X-ray diffraction peaks in order to confirm the hammering effect as well as the micro-strain during the AD deposition. From the above results, deposition mechanisms related to the particle size are studied. The results of this study indicate the optimal particle size and formation mechanisms for dense Al<sub>2</sub>O<sub>3</sub> film with a smooth surface roughness as well as for a porous Al<sub>2</sub>O<sub>3</sub> film with a rough surface roughness.
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