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.

흰쥐에서의 카르복시메칠셀룰로오스나트륨과 겔란검 혼합겔의 유착방지 효과

권윤환,이시범,이정권,박용덕,박정숙,황성주 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.6

The aim of the present study was to investigate the efficacy of a mixed gel formulation composed of sodium carboxymethyl cellulose and gellan gum (Na-CMC gel) for the prevention of adhesions after laminectomv. The anti-adhesive effect of the Na-CMC gel was tested in a controlled randomized study using an animal model of lumbar laminectomv. The animals (60 female Sprague-Dawlev rats) were randomly allocated into two treatment groups to receive the Na-CMC gel on the injured area or no gel (control). The incidence of adhesions and their grade were blindly evaluated at 4. 8 and 12 weeks after surgery. The amount of scar tissue and tenacity were grossly reduced by the Na-CMC gel at postoperative 4. 8. and 12 weeks. The mean adhesion scores were 0.75. 125. and 1.38 at 4. 8. and 12 weeks in the gel-treated group. respectively. No significant inflammatory reaction was observed and the healing of wound was not affected by the Na-CMC gel. The Na-CMC gel reduced the amount of scar formation and tenacity in rat laminectomv model without affecting the healing of operation wound and other complications. Therefore. the Na-CMC gel may be the potential to prevent postsurgical adhesions in clinical state.

진단용 X-선 장치에서 조사야조절기구의 성능개선에 대한 연구

권덕문,김성환,유동수,남효덕 대구보건대학 2002 대구보건대학 論文集 Vol.22 No.-

The performance of the X-ray equipment's collimator system was improved by using ultrasound distance indicator and laser unit. The laser beams were coincided with radiation field. The distance between X-ray focus and film could be measured by using the ultrasound distance indicator attached collimator. According to the actual investigation in collimator, 30% of equipments were not satisfied recommendations on standard of illumination intensity, and 25% of them were not satisfied recommendations on limits of light/radiation field coincidence. Therefore by using laser beam coincided with light field the difference between light field and radiation filed could be decreased. By using the ultrasound distance indicator, the distance between focus and film could be measured easily, rapidly and correctly.

패밀리 셋업이 존재하는 병렬기계 일정계획 수립

권익현,신현준,엄동환,김성식 한국경영과학회 2005 한국경영과학회지 Vol.30 No.1

This paper considers identical parallel machine scheduling problem. Each job has a processing time, due date, weight and family type. If a different type of job is follow by prior job, a family setup is incurred. A two phased heuristic is presented for minimizing the sum of weighted tardiness. In the first phase, using rolling horizon technique, group each job into same family and schedule each family. In the second phase, assign each job to machines using schedule obtained in the first phase. Extensive computational experiments and comparisons among other algorithms are carried out to show the efficiency of the proposed algorithm.

개에 있어서 耳根部의 Lidocaine 水針에 의한 全身 無痛覺의 誘發

권현주,유건주,이상은,이정연,송근호,김명철,정성목,박성준,김덕환 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Twelve clinically healthy mongrel dogs were used to clarify the possibility of general analgesia induction by lidocaine aquapuncture to auricular root area in the present study. The experimental animals were devided into control (6 heads) and experimental groups (6 heads), respectively. Physiological salines (3 ml/kg) were injected into both auricular root areas in control group. Lidocaine hydrochlorides (3 ml/kg) were injected into both auricular root areas in experimental group. Superficial pain, the changes of vital signs and blood leukocytes, and PCV were examined on pre, 5 min., 15 min., 30 min, and 60 min. after injection in control and experimental groups, respectively. Analgesia was not detected at all in control group, however, all experimental animals were recumbent and analgesia was generally detected in the auricles, noses, dorsal parts, ventral areas, limbs and tails from 5 to 30 minutes after injection with lidocaine hydrochloride into auricular root areas in experimental group. As for the change of vital signs, body temperature showed decreasing tendency from 5 minutes after lidocaine injection in experimental group. Heart rates and respiration rates were increased on 5 minutes after lidocaine injection and then they showed decreasing tendency in experimental group. No significant difference were found among groups. As for the changes of hematological findings, the numbers of blood leukocytes were increased till 15 minutes after lidocaine injection and then they showed decreasing tendency. PCV values were increased on 5 minutes after lidocaine injection, and then they showed decreasing tendency. However, no significant differences were observed among groups. Considering the above findings, it was thought that general analgesia was possible by aquapuncture with lidocaine hydrochloride into auricular root areas and lidocaine aquapuncture didn’t affect so much to the changes of vital signs and blood.

방사선 조사선량에 따른 백서 악하선의 caspase-3 발현양상

권기정,최용석,황의환,이상래,고광준 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Purpose : To investigate the caspase-3 expression in the acinar and ductal cells of rat submandibular glands after the irradiation of various doses. Materials and Methods: The male Sprague-Dawley rats weighing approximately 250 gm were used for this study. The experimental group was irradiated with a single absorbed dose of 2, 5, 10, and 15 Gy on the head and neck region. The rats were sacrificed on the 1st, 3rd, 7th, 14th, 21st, and 28th day after irradiation. The specimens including the submandibular gland were sectioned and observed using histopathological and immunohistochemical methods. Results : The local destruction of the acinar and ductal cells and the karyopyknotic nuclei of the acinar cells were observed in the 2 Gy and 5 Gy irradiation groups later than in the 10 Gy and 15 Gy irradiation groups. And the expression of caspase-3 was prominent only in the ductal cells in the 2 Gy and 5 Gy irradiation groups. Conclusion : This experiment suggests that radiation-induced apoptosis in the ductal cells of rat submandibular glands was induced by a low dose radiation associated with the activation of caspase-3 and radiation-induced necrosis was induced by a high dose radiation. (Korean J Oral Maxillofac Radiol 2006; 36 : 7-15)

경남지역 벼 친환경재배시 고품질 유색미 생산을 위한 적정 품종

김상열,한상익,오성환,이종희,권영업 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

수직하향핀이 부착된 수평 평판에서의 자연대류 열전달에 관한 해석적 연구

권순석,권용일,양성환 동아대학교 공과대학 부설 한국자원개발연구소 1989 硏究報告 Vol.13 No.2

This study has been carried out to investigate into the natural convection heat transfer from the isothermal horizontal plate with downward projecting fins numerically. The governing equations for the system are solved by the finite difference method and sucessive under relaxation method at Ra=10^(5), Pr=0.71, C_(F)=7.75. Mean Nusselt numbers, velocities, temperatures and stream functions are obtained for various dimensionless fin lengths. The results are as follows ; 1. The dimensionless temperature distributions decrease rapidly in fins and linearly in fluid as x/s increase 2. The mean plate, fin and total Nusselt number are decreased by increasing the dimensionless fin lengths 3. The mean late Nusselt number is less than the mean fin Nusselt number at l/s>8.0 4. The local fin Nusselt number is increased rapidly near the fin tip and that of the fin tip is decreased rapidly by increasing the dimensionless fin lengths.

디지탈방사선촬영술을 이용한 인접면 치아우식증 진단에 관한 실험적 연구

권기성,황의환,이상래 慶熙大學校 齒科大學 1994 慶熙齒大論文集 Vol.16 No.1

The purposes of this study were clinical comparison and evaluation between digital radiography and conventional radiography for the detection of artificial interproximal caries. Four freshly extracted, unrestored posterior teeth were obtained and canes was simulated by drilling semicircled defect with variable size at the interproximal surface of each tooth. The experiments were performed with IBM-PC/32 bit-DX compatible, video camera(VM-S8200, Hitachi Co., Japan), color monitor(Multisync 3D, NEC, Japan). Sylvia Image Capture Board for the ADC(analog to digital converter) was used, and spatial resolution was 512 x 480 with 256 gray levels. The obtained results were as follows: 1. At the condition of under exposure, the radiographs were superior to the digital images in readability. Also, as the size of the artificial lesion was increased, readability of the radiographs was elevated. 2. The digital images were superior to the radiographs in readability especially under over exsposure. 3. As the exposure time and size of lesion was increased, the gray level of region of interest of the digital image was decreased proportionally. 4. As the F-value of average gray level of region of interest at individual exposure time and size of lesion, gray level of the all lesion sizes was decreased in comparison with that of the normal enamel.

유아의 기관절개술에서 발관방지를 위해 고안된 기관절개 튜브

권진형,김성운,오천환 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Tracheostomy in infants and children is associated with a high rate of accidental decannulation in the early postoperative period. The most common complication in infants and children, which most often results in death, is accidental decannulation. Other authors advocate suturing tracheostomy tubes in place in infants and children under general anesthesia in operating room for avoiding decannulation. The authors designed tracheostomy tube for the prevention of accidental decannulation following tracheostomy in infant, so report with review of literatures.