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제주도 연안 갈치 채낚기 어구의 생력화 : 1. 연속식 채낚기어구의 모형 실험
서두옥,정용진,김석종,이창헌,김고환,박용석 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-
The authors carried out a model experiment of continuous hairtail hand line on the rooftop in order to obtain the fundamental data on elimination of labor with hairtail hand line in the coast of Jeju The results are as follow : 1. The continuous main line was rotated smoothly by driving roller. 2. The branch lines and hooks on a main line which was rotated by rotary machine were entangled slightly. 3. The branch lines attached to rubbered model of hairtails to hooks were rotated continuously by the rotary machine.
컴퓨터 시뮬레이션에 의한 서브마이크론 CMOS 소자의 디자인 고려사항
서용진 대불대학교 1996 論文集 Vol.2 No.2
In the manufacturing of VLSI circuits, variations of device characteristics due to the slight differences in process parameters drastically aggravate the performance of fabricated devices. Therefore, it is very important to establish optimal process conditions in order to minimize device sensitivities. In this paper, we used one-dimensional process simulator, SUPREM-Ⅱ, and two-dimensional device simulator, MINIMOS 4.0 in ordr to extract optimal process parameter which can minimize changes of the device characteristics caused by process parameter variation in the case of submicron CMOS devices. From this simulation, we have discussed design considerations from the dependences between process parameters and device characteristics.
표면이온주입에 의한 LDD-nMOSFET의 핫 캐리어 신뢰성 개선에 대한 연구
서용진 대불대학교 1998 論文集 Vol.4 No.1
Reduction of hot carrier degradation in MOS devices has been one of the most serious concerns for MOS-ULSIs. In this paper, three types of LDD structure for suppression of hot carrier degradation, such as spacer-induced degradation and decrease of performance due to increase of series resistance will be investigated. LDD-nMOSFETs used in this study had three different drain structure, (1) conventional Surface type LDD(SL), (2) Buried type LDD(BL), (3)Surface Implantation type LDD(SI). As a results, the surface implantation type LDD structure showed that improved hot carrier lifetime to comparison with conventional surface and buried type LDD structure.
서용진,정소영,박성우 대불대학교 2002 論文集 Vol.8 No.1
Optoelectronic characteristics of the superlattice as a function of deposition temperature and annealing conditions have been studied. The nanocrystalline silicon/adsorbed oxygen superlattice formed by molecular beam epitaxy (MBE) system. Consequently, the experimental results of superlattice with multilayer Si-O structure showed the stable photoluminescence(PL) and good insulating behavior with high breakdown voltage. This is very useful promise for Si-based optoelectronic and quantum device as well as for the replacement of silicon-on-insulator(SOI) in ultra high speed and lower power CMOS devices in the future, and it can be readily integrated with silicon ULSI processing.
전문 런닝화 개발을 위한 런닝화 화형 분석 : 2000년 런닝화를 중심으로
서국웅,윤양진,박승범,김용재 부산대학교 체육과학연구소 2000 體育科學硏究所 論文集 Vol.16 No.-
This study was designed to investigate the problem of the existing Running Standard Last for the Male adult and to suggest some useful information for the better design development and construction of running shoes last. The subjects for this study are based on 4 male adults who had the running pattern of rearfoot strike with normal feet. 51 separate measurements of four lasts of running shoe with N, R, AD, AS brand were tested using a 3-mentional measurement. Four running shoes and a barefoot were measured using a pressure distribution measurement. The findings of the study were as follows 1) The N running shoes last was larger than those for R, AD and AS the standard in the 8 items. The AS running shoes last was larger than those of N, R, AD last in the 8 items. The R's last was the biggest in short heel girth and long heel girth. The AD's last was the biggest in seat length and firth toe height 2) In the regional peak pressure of the running sheos, the barefoot and brand running shoes showed the biggest pressure distribution in the hallux, There were the slightest pressure in the medial midfoot and lateral midfoot. 3) The instance of regional peak pressure, the barefoot and the running shoes showed earlier peak pressure for the lateral heel. It was barely possible to measure pressure distribution in medial midfoot. 4) In the light of time percentage of peak pressure distribution measurement in each mask, N running shoes showed the longest time in medial heel, lateral heel, medial midfoot, lateral metatarsal and lateal toes, AD running shoes showed the longest in first metatarsal, second metatarsal and hallux, R running, the longest in second toes. 5) In the maximum force for pressure distribution, barefeet showed the biggest pressure distribution in second metatarsal and R, AD running shoes the biggest in first metatarsal, respectively. 6) In the time of peak pressure distribution measurement, barefeet quickly showed peak pressure distribution in the lateral midfoot. Simultaneously, N. R, AD and AS's running shoes showed peak pressure distribution with barefeet. 7) In the characteristic of the new last's model, bottom length resulted in 276.00mm, stick length 283.29mm, 70% ball mirth 255.12mm, bottom width 91.21mm, toe thickness 30.00mm.
효소고정화막과 반투막성질의 PVA적층막 제조 및 산소센서에서의 특성
서종원,김태진,정용섭,윤정원 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1
The oxygen electrode of biosensor needs enzyme immobilized membrane and dialysis membrane for measurement of oxygen concentration, which in solution after enzyme reaction with its substrate. The one-layer PVA laminated CTA/PCL membrane was developed for oxygen electrode of biosensor. Enzymes have immobilized on cellulose triacetate/polycarprolactone membrane by CDI method, and laminated with polyvinyl alcohol, aldehyde and acid. This membrane immobilized with glucose oxidase, ascorbate oxidase, pyruvate oxidase and alcohol oxidase by CDI mehod, and PVA laminated CTA/PCL membrane have been tested with various concentration of substrates of enzymes by use of YSI oxygen sensor. Under 5-10mmol substrates become 0.37-0.83μA(r=0.995) currents, and about 56% of glucose oxidase activity was remained after 8 weeks, others were remained very low. SEM shows smooth surface and tightly attached PVA on enzyme immobilized CTA/PCL membrane.
반경험적 스케일 방법을 사용한 0.35 μm LDD-nMOSFET의 핫 캐리어 현상 억제를 위한 공정설계에 관한 연구
서용진,안태현,이경태 대불대학교 1998 論文集 Vol.4 No.1
This paper grasped trends of hot-corrier and punchthrough phenomena as a variation of some process parameters such as LDD doses (P), spacer lengths, channel doses(BF_(2)) and V_(T) adjusting channel implantation energies using Design Trend Curve(DTC). As the LDD dose increased, hot-carrier phenomena became more severe and punchthrough phenomenon was deteriorated. As increasing channel dose (BF_(2)), hot-carrier phenomenon was aggravated in contrast with punchthrough phenomenon which was improved. The model was proved by two dimensional electrical characteristics including generation of impact ionization rate and distribution of electric field with simulation. It was used to TSUPREM-IV and MEDICI for processing and device simulation, respectively.