PC TCP/IP를 이용한 서버 데이타베이스 접근의 설계 및 구현

오석균,진성일 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.2

클라이언트/서버 컴퓨팅 환경의 출현은 네비게이셔널 형태인 기존의 PC DBMS와 UNIX 서버상의 RDBMS와의 연결 욕구가 증가되었다. 이를 지원하기 위해 PC DBMS인 슈퍼 화일에 SQL 문을 사용할 수 있게하여 서버의 Empress 데이타베이스를 접근 가능하도록 SFNet을 설계하여 구현하였다. 새로운 API(Application Program Interface)의 제안으로 슈퍼 화일은 자신의 데이타베이스를 운용하며 서버상의 데이타베이스 접근이 가능하다. 클라이언트와 서버간의 통신을 위해 PC TCP/IP를 사용하였고 서버와 Empress의 인터페이스를 위해 Empress의 기능을 보강하였다.

카오스를 이용한 통신 비화시스템 연구

오진우,김창석 明知大學校 産業技術硏究所 1999 産業技術硏究所論文集 Vol.18 No.-

In this, we study a new secure communication system using a characteristic of chaos. The proposed system utilize a few system condition equation to occur securing signal and mixed with speech signal. The proposed system composed a flexible attracter occurrence development, obtained a high secure degress using attracter of the various styles. We convince a good quality securing in S/N rate of -40[dB] with secured signal and speech signal.

Terfenadine과 Ketoconazole 병용투여에 의해 유발된 Torsade de Pointes1예

오석규,국향,임수빈,정진원,박양규,박옥규 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.3

일제하ㆍ미군정기 韓昇寅의 政治活動과 經濟認識

吳鎭錫 연세대학교 경제연구소 2001 延世經濟硏究 Vol.8 No.1

본고는 1920년대부터 1930년대 초반에 걸쳐 일본의 明治大學과 미국의 풀러톤, 미주리, 콜롬비아 대학 등에서 修學하였고, 미국유학중에는 興士團에서 그리고 귀국해서는 同友會에서 활약하였으며, 協成實業學校 敎師, 和信百貨店 社員을 거쳐, 解放後에는 美軍政의 商務部 商務局長에 발탁되어 남한의 資本主義 國家建設에 일조했던 韓昇寅 의 정치활동과 경제의식의 형성과정, 내용 등을 검토한 글이다. 그동안 이 시기의 經濟學者, 經濟評論家들을 대상으로 한 경제사상사연구가 활발히 진행되어 왔지만, 社會主義 經濟學者들과 이른바 中間派 진영 논자들의 경제사상해명에는 일정한 성과를 거두었음에도 불구하고 정작 구미유학을 통해 근대 자본주의 경제학을 체득하고 귀국하여 민족ㆍ자본주의 진영에서 활동하면서 해방후 남한 자본주의 사회의 주역이 되었던 지식인들을 사례연구로서 검토한 작업은 드물었다. 그러한 점에서 본고는 그간의 연구사적 공백을 일부이나마 메울 수 있으리라고 생각한다.

절골술을 이용한 안면교정

오석희,한기환,강진성 大韓成形外科學會 1989 Archives of Plastic Surgery Vol.16 No.5

The most important factor in the beauty of the face is the harmony of the facial skeleton and soft tissue. The postoperative result is not always satisfying after only classic soft tissue surgery. The reason for dissatisfaction is disharmony of the facial skeleton. Recently, the development of maxillofacial surgical techniques enable disharmony of the facial skeleton to be successfully corrected. The authors have had experience with 33 cases of congenital and acquired facial deformities, from March of 1986 to February of 1989, and have followed them from 6 months to 2 years. We used an intraoral approach in most cases and got good results. There were four wound disruptions which were treated conservatively and resolved without sequelae.

고령자를 위한 주거시설 치수 표준화 연구

김석준,권순정,오은진,김노석,김상길,이특구 한국의료복지시설학회 2008 의료·복지 건축 Vol.14 No.3

As the elderly population is growing rapidly, guidelines for planning and designing of the elderly housing are required for improving housing environment of the elderly. The purpose of this study is making the basic dimensional standardization of residential spaces for the elderly. The dimensional standard of spaces suggested in this guideline considers characteristics of both aged and the general users. The spaces studied in this research include bedroom, living room, bathroom, kitchen and other circulation spaces in the elderly housing. The design guidelines of furniture, equipment for the aged with sizing of the areas are provided. Finally, applicability of the output is reexamined by implementing this guidelines to the sample planning and design of the elderly housing

표면처리된 탄화규소의 첨가가 탄소섬유 강화 복합재료의 열안정성 및 기계적 특성에 미치는 영향

박수진,오진석,서동학 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.5

본 연구에서는 표면처리에 따른 탄화규소(SiC)의 표면특성변화가 탄소섬유 강화 복합재료의 열안정성과 기계적 물성에 미치는 영향을 조사하였다. 표면처리된 탄화규소의 표면특성은 산·염기도, 접촉각측정 그리고 FT-IR을 통하여 알아보았으며, 열안정성은 TGA를 이용하여 조사하였다. 탄소섬유 강화 복합재료의 기계적물성은 interlaminar shear strength(ILSS) 그리고 critical strain energy release rate mode Ⅱ(G_(IIC))를 통하여 고찰하였다. 실험결과 산 처리된 SiC(A-SiC)와 오존처리된 SiC(0-SiC)는 미처리된 SiC(V-SiC)나 염기 처리된 SiC(B-SiC)에 비하여 산도가 증가하였고, 접촉각 측정 결과, 산성 용액과 오존 표면처리는 극성요소의 증가에 기인하는 SiC의 표면자유에너지를 증가시켰다. ILSS과 G_(IIC) 같은 기계적 계면 성질은 A-SiC와 O-SiC로 향상되어졌는데, 이러한 결과는 좋은 젖음성이 최종 복합재료의 SiC와 에폭시 수지 매트릭스 사이의 계면결합력을 증가시키는 중요한 역할을 하기 때문으로 판단된다. In this work, the effect of chemically wet and dry treatments of SiC was investigated in mechanical interfacial properties of carbon fibers-reinforced composites. The surface properties of Sic were determined by acid/base values, contact angles, and FT-IR analyses. The thermal stabilities of the carbon fibers-reinforced composites were investigated by thermo-gravimetric analysis (TGA). Also, the mechanical interfacial properties of the composites were studied in interlaminar shear strength (ILSS) and critical strain energy release rate mode Ⅱ(G_(ⅡC)) measurements. As a result, the acidically treated SiC (A-Sic) and ozone treated (0-Sic) had higher acid value than that of untreated Sic (V-Sic) or basically treated Sic (B-Sic). According to the contact angle measurements, it was observed that acidic solution and ozone treatments led to an increase of surface free energy of the SIC surfaces, mainly due to the increase of the specific (polar) component. The mechanical interfacial properties of the composites, including ILSS and G_(ⅡC) had been improved in the specimens treated by acidic solutions and ozone gas. These results were explained that good wetting played an iniportant role in improving the degree of adhesion at interfaces between SiC and epoxy resin matrix in a composite system

핸드스프링 무릎굽혀 앞공중돌기동작과 몸펴 앞공중돌기동작의 운동학적 비교분석

권오석,윤양진 부산대학교 사범대학 2002 교사교육연구 Vol.41 No.-

In this study, 4 gymnasts who were students of B University at that time were taken and their performance of handspring salto forward tucked and handspring salto forward stretched at through 3 dimensional movement analysis to tell the duration for each phase of the movement, the movement of the articulation of the body, the tract of moving center of the body, and its kinematic element. It is all to provide basic data for efficient training of gymnasts and the findings are as follows: 1. The time duration for phase 1 and 2 differed each other and faster landing on hands in forward handspring salto forward stretched than in forward salto with the body bent helped the straight-line movement change to circular movement giving the handspring a big circular movement, and forward jumping on feet with rapid upright of the upper body maximized the circular radius on the axis of the jaw, contributing to rapid backward circular movement of the lower part of the body. 2. In the observation of the position of the body center, the sway of the body center and the power dispersion was smaller in general in forward salto with the body stretched than in forward salto with the body bent. And in its forward and backward position, it showed lower position in handspring phase of 1 and 2, but higher in the salto of phase 3, 4 and all these contributed to bigger and more stable circular motion. 3. Articulation angle of the body in each phase of handspring forward salto with the body bent and in forward salto with the body stretched appeared to be different through 5 phases. It had more centripetal force in forward salto with the Elbows, shoulders, hips, knees having more curve. In forward salto with the body stretched, centrifugal force appeared to be strong with the elbows, shoulders, hips, knees all being extended. To summarize, Handspring forward salto with the body bent seems to have curved articulation and be slow, while in forward salto with the body stretched, its circular movement appeared be faster with speedy landing on hands, extended knees angle for good jump, and with accelerated hips articulation. Handspring forward salto with the body stretched appeared to enhance its technical performance with far-reaching circular motion. Therefore, forward salto with the body stretched is considered to produce more gracious and dynamic motion than forward salto with the body bent does.

신경회로망을 이용한 SRM의 토오크맥동 저감제어

안진우,오석규 慶星大學校 1998 論文集 Vol.19 No.1

This paper proposes a control scheme reducing the torque ripple of SRM using ANN(Artificial Neural Network). The torque of SRM depends on phase current and the rate of inductance variation. But the latter is nonlinearly changed according to phase current, which makes a difficulty to control the instantaneous torque. Therefore learned inductance of SRM using ANN that is known to treat nonlinear system recently, is used to predict instantaneous torque and to reduce torque ripple in SR drives.

매트운동에서 핸드스프링 앞수완동작의 운동학적분석

권오석,윤양진 釜山大學校 附設 體育科學硏究所 2002 體育科學硏究所 論文集 Vol.18 No.1

In this study, 4 gymnasts who were students of B University at the same time was taken and their performance of forward Handspring salto with body stretched was looked at through 3 dimensional of the body, the tract of moving and its kinematic element. It is all to provide basis data for efficient training of gymnasts and the findings are as follows: 1. From the examination of the sequence of duration phase, it appeared that in phase 1, the superior group had longer duration with long strider in home step, in phase 2, they bent their upper body making big shoulder angle and changed the straight-line motion to circular motion. And it appeared to result in efficient circular motion while in flight phase of 4 and 5. 2. It appeared that in the event 2 in which the movement of support with hands took place, the Superior group had bigger shoulder angle so that the Handspring movement was faster in its rotation on the axis of hands supporting. In event 3 of jump in feet, the hips angle was big enough to produce with its weight sufficient pressure on feet to maximize the reaction of the floor. 3. For the speed in each phase, the Superior group spurred rapid speed with the hips angle curved a little bit in event 4 in which the body made vertical angle to the floor while in handspring salto forward piked movement of the body and in event 5, the hips angle extended rapidly producing good rotation speed. In summery of all the elements considered above, big strider with the body bent to produce decisive support on the hands seemed to result in increased rotation speed in handspring, bigger pressure on feet, and good speed in handspring salto forward stretched.