서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

유년기 안구적출술 및 방사선치료로 인하여 발생된 안와 열성장에 대한 재건 치험례

홍관석,김성문,김훈,임재석,최미숙,최성원,권종진 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1

There are many reports of the surgical management for the craniofacial abnormalities arising from the irradiation of the head and face for treatment of childhood cancers. Since the mordern combined-modality theraphy for childhood cancers began in the late 1960s and the early 1970s, recent reports have described the occular, dental and maxillo-facial abnormalities after irradiation in long-term survivors of cancers of the head and face. The resultant deformities may be known to be difficult to reconstruct with surgical techniques. This paper describes the late reconstructive surgery for the unilateral orbital and malar hypoplasia after eyeball enucleation and irradiation during childhood to correct the facial asymmetry and expand the contracted orbital socket into the functional dimension for the retaining eyeball prosthesis with spherical implant. We reports the satisfactory preliminary results from the midfacial osteotomy through the supero-lateral orbital rim and malar bone and the antero-lateral repositioning with the autogenous bone grafting in 26 year-old female patient who will be planned to make the new eyeball prosthesis by the department of ophthalmology.

병렬 결함 테스트 및 결함 포용 기능을 갖는 메모리 설계

권오형,홍성제 위덕대학교 부설 전자기술연구소 1999 전자기술연구소 논문집 : 위덕대 Vol.3 No.1

본 논문에서는 병렬 테스트가 가능하도록 메모리의 셀 어레이를 독립적인 여러 셀블록으로 구분하고, 셀블록들이 동시에 테스트에 참여할 수 있는 메모리를 설계하였다. 본 연구에서는 1Gb 기억용량이며, 4096개의 256Kb 셀블록으로 구성된 메모리를 설계하였다. 결함 발생시는 결함 셀블록을 고립시키는 graceful capacity degradation 방법을 이용한 결함 포용 회로를 설계하였다. 제안된 1Gb 메모리는 병렬 테스팅을 수행하기 때문에 4096배의 테스트 속도를 보인다. This paper proposes techniques, which perform parallel testing operation and graceful capacity degradation in case of memory fault. We present a 1 giga-bit memory with the techniques as an example. The proposed techniques offer a reduced testing time and an improved yield for high capacity memories.

자동차 공조용 핀형 열교환기의 성능특성에 관한 연구

홍경한,전상신,이승재,박찬수,권일욱,김재열,김병철,하옥남 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

Fin-tube type(Fin-type) heat exchanger has been tested in order to replace the heat exchanger of parallel flow type(P.F-type) which is now widly used in automobile air conditioning system. The following conclusions are drawn by the comparison of the characteristics of the heat exchangers. Evaporator and condenser capacities and COP(Coefficience of performance) were varied as with the compressor speed, outdoor air temperature and air flow rate changed, which much influenced on the characteristics of the air conditioning system. Evaporator and condenser capacities were increased with increasing compressor speed and outdoor air temperature. Evaporator and condenser pressures of Fin- type were decreased by 7% and 5% respectively compared with those of P.F-type. The COP of Fin-type was decreased with increasing outdoor air temperature and compressor speed. The COP of P.F-type was decreased by 14% compared with that of Fin-type.

정칙화 반복 영상복원 처리에 관한 연구

권혁숭,홍성용 대구보건대학 1994 대구보건대학 論文集 Vol.14 No.-

This paper introduces a regularized iterative image restoration algorithm. Generally, linear space-invariant image restoration algorithm often introduces artifacts near sharp intensity transition region. It is shown that these artifacts are attributable to the regularization of the ill-posed image restoration problem. So in this paper, two methods to reduce these artifacts in restored image are proposed. The first methods incorporates deterministic a prior information.

3상 가변 DC 전원장치의 저주파수 특성개선에 관한 연구

권순걸,홍성태 慶南大學校 附設 工業技術硏究所 1994 硏究論文集 Vol.12 No.-

본 연구에서는 진상, 지상 제어가 가능한 컨버터 회로를 이용하여 위상각의 제어에 따른 컨버터의 출력측의 저고조파 제거를 위하여 노치법을 적용시켰다. 각 노치각(θ1,θ2)은 뉴튼랩슨(Newton Raphson) 방법의 비선형함수 해법을 이용해서 구하였고, 컴퓨터 시뮬레이션을 통하여 노치법으로 DC 출력측의 저고조파를 제거할 수 있음을 제안하였다. 그리고 제안된 3상 컨버터의 노치법에 의한 출력측 저고조파 제거에 대한 정당성을 마이크로 프로세서를 이용한 제어회로와 실제 주회로를 제작하여 측정한 실험을 통해서 입증하였다. Line-current harmonics resulting from ac to dc power conversion interfere with power system operation and reduce power factor, hence resulting in increasing power source unnecessarily. This study describes a 3φ phase-controlled converter eliminating low frequency harmonics in the output by inserting notches. Notch points are calculated by Newton-Raphson method. The impacts of the choppings on ac and dc sides are analyzed in the steady state. Potential applications of the study are dc motor controls, high power dc power supplies for telecommunications, static var compensators and HVDC.

Ti첨가 및 균질화 처리가 원심주조한 Cu-Zn-Al계 고력황동의 기계적 성질에 미치는 영향

권영한,허성강,김창규,윤재홍 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

Effects of Ti addition and homogenizing treatment on the mechanical properties in Cu-Zn-Al system high strength brass were investigated. Grain refinement was successfully achieved by Ti addition: The microstructure, which was composed of island or fine feather-like branched Ti compounds was changed to feather-like eutectic microstructure as the content of Ti increased. The highest hardness values was obtained for 0.5wt% Ti specimen and the second was Ti non-added specimen in as-cast conditions. Maximum tensile strength was obtained for 0.5wt% Ti specimen. Dueing to the presence of cast defects and worse castability, tensile strength decreased as the content of Ti increased. Elongation was increased with increasing homogenizing time and temperature: remarkable increase was obtained for 400℃ homogenizing temperature in the 0.5wt% Ti specimen. For 500℃ and 600℃ homogenizing temperature, high elongation was obtained in 2 and 4wt% Ti specimen.

불소가 첨가된 실리콘 산화막의 다층금속절연 특성에 관한 연구

權大赫,南基泓,吳相光 慶一大學校 1997 論文集 Vol.14 No.2

The characteristics of fluorinated silicon oxide (SiOF) films prepared by plasma enhanced chemical vapor deposition(PECVD) were discussed. The deposition of these films was carried out in the temperature range of 80 - 220℃ in a conventional parallel plate plasma reactor with 〈 ±3% uniformity by flowing 2 sccm of disilane (Si₂H6), 100 sccm of nitrous oxide (N₂O), and 20 sccm of tetrafluoromethane (CF₄). AS the deposition temperature increased from 80 to 220℃, the deposition rate of the films increased from 16.7 to 18.4 nm/min; meanwhile, the etch rate decreased from 2.69 to 1.48 nm/sec. The refractive index was 1.46 regardless of the deposition temperature. The Fourier transform infrared (FTIR) spectra of the films showed decreasing Si-O stretching wave number with increasing full width at half maximum (FWHM) as deposition temperature increased. The high frequency capacitance-voltage (C-V) measurements of the metal-oxide-semiconductor (MOS) capacitors fabricated using the films showed increasing effective oxide charge density and decreasing dielectric constant with increasing deposition temperature. Deposition temperature of 180℃ resulted in films with the smallest dielectric constant of 3.75. These films showed an average breakdown strength of 9.14 MV/cm with 77.5% of the MOS capacitors having breakdown field strength ≥9.5 MV/cm

유전체 공진기를 이용한 개인휴대 통신용 대역통과 필터의 설계 및 구현

권정열,이헌용,홍성용,윤중락 明知大學校 産業技術硏究所 1996 産業技術硏究所論文集 Vol.15 No.-

In this paper, the band pass filter for personal communication services was constructed and designed using λ/4 TEM mode dielectric resonators with a (Zr0.65,Sn0.35)ATi1.04O4.04 ceramic of dielectric constant εr=37.8, Qxfo=48.600 temperature coefficient of resonant frequency rf=7ppm/˚C, and Unloaded-Q (Qo) of λ/4 TEM mode dielectric resonator with inner hole size 0.9㎜ and external size 3㎜ using silver electrode is 354.5 at 1950MHz. For the band pass filter design and construction, the design theory and simulation results of band pass filter using J-inverter theory have been studied. The parameters which are evaluated by design theory are practically applied to the filter construction and the simulation results are in agreement with the measured results after fine tunnings.

XENIX OS에서 TERMINAL을 이용한 조합형한글 구현에 관한 연구

권순걸,박재철,이현우,서기영,홍성태 慶南大學校 附設 工業技術硏究所 1992 硏究論文集 Vol.10 No.-

제닉스 시스템의 커널에서는 한글을 읽거나 쓸수가 없으며 한글을 구현하기 위해 바이어스콜이나 비디오램을 직접 억세스하는 등의 컨트롤이 허용되지 않는다. 그러나 제닉스 시스템의 입, 출력 시스템을 잘 살펴보면 한글을 사용하기 위한 해결점을 찾을 수 있다. 영문 제닉스는 키보드에서 입력되는 8비트 코드에서 최상위비트를 무시하여 7비트로 스트립 시키는데 이것을 막고 제닉스가 FOH~FFH까지의 코드를 제어 코드로 사용하지 못하게 함으로써 모든 한글을 터미널상에서 사용 할 수 있게 된다. 한편 제닉스의 표준 메일을 이용 할때에는 80H 이상의 코드가 입력되면 모두 \와 8진수의 조합으로 변경시켜서 출력하는 C함수를 사용하기 때문에 이부분을 수정하고 한글 에코 명령이 포함된 쉘 스크립은 8진코드로 바꾸어 주는 소오스를 활용함으로서 제닉스에서 터미널을 이용한 조합형 한글의 구현이 완벽하게 이루어졌다. Hangul can't be read and used from the kernel of XENIX system. To embody Hangul, the control of direct access of BIOS call or video RAM is not permitted. But a solution to use Hangul can be found through the search of input and output system of XENIX system. English XENIX OS disregards MSB from 8bit code inputting from key board and strip 7 bit. To prevent this, stty-istrip command is used. And by using stty-ixion command not to use control code from FOH to FFH of XENIX, All of Hangul can be used at the terminal. To satisfy these conditions stty-istrip-ixon command is inserted at each user's profile. While sending the letter through the standard mail of XENIX, /user/lib/mail. local program is available. then Hangul is not supported on mail. local, the reason is that if the code over ASCII code 80H is inputted in the mail. local program. C function outputting through the change into the combination of all \and octal number is used, but by modifying mail. local, all of Hangul can be available, and the shell script containing Hangul echo command can treat Hangul at the terminal by using convc source which change source to octal code. In this way combinated Hangul using the terminal from XENIX OS ard completely embodied.