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.

步速變化에 따른 미끄러짐의 생체역학적 연구

서국웅,윤양진,서국은,이중숙,김용재,이언석,이훈식 釜山大學校 附設 體育科學硏究所 1992 體育科學硏究所 論文集 Vol.8 No.-

The purpose of this study was to analyze walking steps to prevent unnecessary energy consuming and prevention of injury from sliding when someone was walking. The questionnaire, high speed video system, E.M.G. system, and force platform system were used to analyze sliding mechanism in biomechanical perspective. Several results were found as following: 1. According to questionnaire regarding sliding, 93.3% of participants have sliding experiences. People have sliding experiences by greasy floor(48.4%) and obstacle (22.5%). Sliding types were found from different kinds of shoes such as sneakers (48.8%) and boots (34.2%). The results were presented as following 44.6% of participants were fall down front direction and 40.3% of people fell down rear side. 2. According to the high speed video system analyzer, step sliding increased with increasing step speed from distance and acceleration speed experiment with 80 steps/min, 100 steps/min, 120 steps/min. Also, the most sliding were occurred with sneakers, boots, and bare feet as order. 3. According to E.M.G. test results, the vastus lateralis M., the vastus medialis m., and the tibialis anterior m. of electric action potential presented strongly when participants fell front, rear, and right side. The vastus lateralis m. and the tibialis anterior m. of electric action potential presented strongly when someone fell left side, but the vastus medialis m. and the gastrocnemius m. of electirc action potential presented as weaker. 4. According to the force platform test results, the most big change of floor antipower of x-axis presented when someone fell the left side. The most of big change of floor antipower of y-axis presented when someone fell down rear side. The most of big change of floor antipower of z-axis presented similarly when someone fell the front, rear, left, and right side.

이중장벽 SiO_(2) 박막 매트릭스 내의 나노스케일 실리콘 입자를 통한 공명 터널링에 대한 연구

서용진 대불대학교 2002 大佛大學校大學院 硏究論文集 Vol.- No.1

The resonant tunneling via nanoscale silicon particles embedded in an oxide matrix was introduced. The nanosale silicon particles were recrystallized by post-annealing and oxidation of a thin amorphous Si layer sandwiched between oxide layers, and then a proper electrical forming process was chosen for observation of electron transport characteristics. To investigate the tunneling nature and the possibility of avalanche multiplication, the I-V and G-V measurements were performed. Consequently, these results are potentially important for silicon based quantum devices. Also, the development of resonant tunneling diode using silicon-superlattice will be play a major role in the design of a Si chip, which is called OEIC (optoelectronic IC), with both electronic and photonic componants.

Deep Submicron nMosfet 설계를 위한 새로운 스케일링 방법에 관한 연구

서용진 대불대학교 1997 論文集 Vol.3 No.1

To achieve the ULSI goals of higher density and greater perfo channel lengths of MODFET have been scaled down. However, the reduction of channel lengths causes undesirable problems, such channel effects, hot-carrier phenomena, and TDDB(time dependent breakdown). These effects, especially in deep submicrometer M make it very difficult to keep leakage current below a requie Therefore, subthreshold current is the dominant short channl peissue that limits MOSFET scaling. In this work, it is tried to design deep submicron MOSFET, using scaling method to achieve a desired value of subthreshold current. An empirical scaling method to achieve subthreshold current was presented, 0.12㎛ gate length nMOSFET's was designed using this method, and the dependence of process parameters and split conditions on device characteristics were examined.

제주도 연안 갈치 채낚기 어구의 생력화 : 1.연속식 채낚기어구의 모형 실험

서두옥,정용진,김석종,이창헌,김고환,박용석 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-

The authors carried out a model experiment of continuoius hairtail hand line on the rooftop in order to obtain the fundamental data on elimination of labor with haritail 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.

DTC를 이용한 새로운 파라메터 추출법

서용진,신희갑,이철인,장의구 중앙대학교 기술과학연구소 1994 기술과학연구소 논문집 Vol.24 No.-

In the manufacturing of VLSI circuits, variations of device characteristics due to the slight differences in process parameters drastically aggravate the performances 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 order to extract optimal process parameter which can minimize changes of the device characteristics caused by process parameter variation in the case of short channel nMOSFET and pMOSFET device. From this simulation, we have derived the dependence relationship between process parameters and device characteristics. Here, we have presented a method to extract process parameters from design trend curve(DTC)obtained by process and device simulations.

소아기 내과계 질환의 통계적 관찰

서종진,이건수,정용헌 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

Statistical analysis of medical in-patients of pediatric age from Jan. 1989 to Dec. 1989 was assessed to find out the general patterns and trends of childhood medical diseases at Chungnam National University Hospital. The results are as follows : 1. Total numbers of in-patients were 1266, of which 782 were male and 484 were female. The ratio of male to female was 1.62 : 1. 2. According to the observation on patient distribution by age and departments, the most frequent age group was under 1 month in Pediatrics, 10-15 years of age in Psychiatrt, Rehabilitation Medicine and Neurology, 5-10 years of age in Dermatology. 3. According to the observation on the duraton of admission, more than half were admitted less than 7 days(53%) and most patients were less than 21 days (90.4%). 4. The most common disease of in-patients was pneumonia(8.1%) followed by neonatal hapoxia, prematurity, and acute gastroenteritis. The most common organ system(disease category) was neonatal diseases(26.4%) followed by respiratory diseases(17.4%) and infectious diseases(11.9%). 5. Average duration of admission was 10.9 days. That of Pediatrics was 10.2 days, Dermatology 7.0 days, Rehabilitation Medicine 43 days, Neurology 12.8 days and Psychiatry 20 days.

0.8 μm의 채널길이를 갖는 pMOSFET 소자의 짧은 채널 특성 개선에 관한 연구

서용진 대불대학교 1995 論文集 Vol.1 No.2

Short channel effects of submicron pMOSFET device fabricated with twin-well CMOS process were studied. Initial conditions of ion implantation and process were guessed using SUPREM process simulation. The experimental results of submicron pMOS device with device dimension of 50/0.8 μm demonstrate good device characteristics such as good drain current-voltage characteristics, low body effects and threshold voltage of ±1.0 V, high breakdown voltage of ≥10 V, low subthreshold swing(S.S) of ≤ 105 mV/decade.

효과적인 하중운반체계의 동역학적 연구

서국웅,양점홍,윤양진,황영성,이중숙,김용재,유경복 釜山大學校 附設 體育科學硏究所 1994 體育科學硏究所 論文集 Vol.10 No.-

The purpose of this study was to get the quantitative data of effect of two different load carrying system on Kinematics and Kinetics. The subjects for the research were 2-adults. The mechanism of each load carrying pattern was measured by a motion analylizer, a forceplatform and EMG system. The conclusions were get from Kinematics variables and Kinetics variables. 1. It was not effected at the vertical reaction force(Fz) of left, right foot according to the big value the 1st peack of 10kg, 15kg fore, back-pack carrying system, 20 kgw, 30 kgw back-pack carrying system in walking. But it was effected at the vertical reaction force(Fz) on 30 kgw back-pack carrying system in walking. 2. It was not effected at the Anterior-Posterior reaction force(Fx) of left, right foot according to high value of the 1st peack on 10 kgw, 15 kgw fore, back-pack carrying in walking. But, it was effected on the 20 kgw, 30 kgw only back-pack carrying in walking. 3. It was effected at the left-right reaction force(Fy) of left-right foot according to the big value of the 2nd peak on 10 kgw, 15 kgw fore-backpack carrying system in walking. It was more effective than 20 kgw, 30 kgw back-pack carrying system in walking. There was not disorder force(Fx) on 10 kgw, 15 kgw fore-backpack carrying system in walking. 4. Analysis of computer graphic, on the pack carrying system in walking. It was efficient in 10 kgw, 15 kgw fore-backpack carrying system in walking. But, it was efficient on 20 kgw, 30 kgw backpack carrying in walking. Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, are stressed to bend their body foreward. So it occurred fatigue fast, injured muscles and joints. 5. Extension anyles and flection angles of the knee joint and the hip joint on 10 kgw, 15 kgw fore-backpack carrying system in walking showed less than those on 20 kgw, 30 kgw backpack carrying system in walking. It was efficient on the 10 kgw, 15 kgw fore-backpack carrying system in walking. 6. Magnitudes of EMG of Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, were increased according to increasing weight road and were decreased on the 20 kgw, 30 kgw back-pack carrying system in walking.

순환기 질환에서 엔도텔린-1의 병태생리학적 의미와 엔도텔린 길항제의 임상적 유용성

서봉관,최동주,황진용 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.5