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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.
요하지통 환자에서 두 개의 캐눌라를 이용한 박동성 고주파 신경근 응고술의 임상 연구
김천숙,배재영,배덕구,강규식,안기량,권진형,김지은,유시현 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1
Dorsal root ganglion(DRG) block by the local anesthetics and steroids which has done classically in low back pain(LBP) patients with radiculopathy has high incidence of recurrence rate and side effects of steroids. Recently a new technique of pulsed radiofrequency thermocoagulation(P-RFTC) was introduced and substituted for it because of the benefits such as relatively low recurrence rate, low risk of nerve injury and comfort during the procedure. We experienced 15 patients who had LBP with radiculopathy and no or little response to epidural steroid injection. When we performed DR ganglionotomy by P- RFTC under the C-arm guide in these patients, we tried to approach the exact DR ganglion using tow cannulas - the one for obtaining patient's subjective symptoms and injection of contrast dye, the other for making a RF lesioning after identifying the impedance of sensory and motor stimulation. In conclusion, DR ganglionotomy by P- RFTC using two cannulas in LBP patients is an easy and safe procedure with satisfactory results.
김남형,박지훈 濟州大學校 海洋硏究所 2003 해양과환경연구소 연구논문집 Vol.27 No.-
The effect of wind on the circulation in Jeju harbor was examined using a numerical shallow water model. A finite element for analyzing shallow water flow is presented. The Galerkin method is employed for spatial discretization. Two step explicit finite element scheme is used to discretize the time function. which has advantage in problems treating large numbers of elements and unsteady state. The experiments compare the case considering the effect of wind with the case which do not consider the wind effect. According to wind direction NW winds. velocity of flow vector became slightly stronger in the flow field. The computed results have shown the good adaptability of moving boundary condition and effect of wind. From these studies. it can be concluded that the present method is a useful and effective tool in tidal current analysis.
김천숙,박은정,강규식,김지은,안기량,권진형,유시현,주영철,권순정 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.1
Background: The OR(operating room) should provide an optimum environment that is safe for the patient and the working personnel. The air ventilation system of OR has been studied to decrease the contamination of air. We investigated the flow and contamination of the air in OR at our hospital. Method: Cultures in OR were made and the number of bacteria and fungi were calculated. A two-dimensional model for the cross-section of an operation room is developed for the CFD (computational fluid dynamics) analysis. The characteristics of air flow in the empty operation room and in the occupied operation room are calculated by using a CFD program. Results: The current air ventilation system of our hospital does not deliver the clean air to the operating site efficiently in occupied OR. Conclusions: We suggested a new location of air ventilation system which improves air venting with little increase of the cost of equipment.
MgO 버퍼층을 이용한 PZT 박막의 형성 및 특성 평가
김지미,전호승,강재경,최형봉,김철주 서울시립대학교정보기술연구소 2001 정보기술연구소 논문집 Vol.3 No.-
In this paper, we fabricated the MgO layer by sol-gel method and estimated possibility as a buffer layer for ferroelectric such as PZT. MgO(Magnesium Oxide) proposed as buffer layer of ferroelectric is already for much used as buffer layer in optic technology. There are many formation methods of MgO layer, but in this study, we selected the sol-gel method which is easy to control the content of material and possible for fabrication of uniform layer, then we formed thin layer through the composition of MgO and PZT solution, spin coating and annealing. To estimate the possibility as buffer layer about ferroelectric layer, we analyzed the physical and electrical characteristics about PZT on MgO layer.By SEM, AFM and XRD analysis, we could know facts that the surface condition of PZT on MgO was relatively smooth and the crystal orientation of PZT was enhanced by MgO layer. Due to the measurements of P-V, C-V and I-V characteristics of PZT/MgO capacitor structure, the polarization, fatigue and breakdown properties of PZT on MgO were much improved than those of PZT without MgO layer. Also, in MFIS structure, the PZT on MgO showed the stable memory property. These results could be compared to those of MgO buffer layer formed by sputtering, so, if studies about the composition of MgO solution and the formation of MgO layer are executed continuously, the fabrication process of MgO layer by sol-gel method can be applied as the process for buffer layer of ferroelectric.
김남형,박지훈 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1
In this paper, the numerical model of the flow analysis by finite element technique is described. The Galerkin method is employed for spatial discretization. Two step explicit finite element scheme is used to discretize the time function, which has advantage in problems treating large numbers of elements and unsteady state. Two dimensional hydrodynamic model considering moving boundary condition is developed. Also the model flume was applied to verify in the idealized water, and the results of this study confirm the efficiency of moving boundary treatment in coastal numerical computation.
X-ray diffraction을 이용한 전분 결정구조 변형에 관한 연구
김지용,최형택 기전여자대학 1997 論文集 Vol.17 No.-
High amylose sorn starch are charged crystal stucture by Extrusion. This formed starch ctystal of Extrudate is studied by X-ray diffraction. X-ray patterms show that starch crystal structure and crystal ratio are changed.