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서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
文晟基 嶺南大學校 工業技術硏究所 1982 연구보고 Vol.10 No.2
Subsonic and transonic potential flow over an infinitely-long two dimensional wall, corrugated in the shape of harmonic waves, is investgated by the semi-analytical, semi-numerical and fullynumerical schemes. We consider that the fully-numerical scheme is finite difference method based on transonic small perturbation theory. It is found that the transonic flow assumption is physically adapted when free stream Mach number is larger than 0.86015 in this problem and it has been physical nearest singularity lies on the positive real axis, so the governing equation and the boundary conditions can be simplified by the neglecting lower-order terms. The critical transonic similarity parameter has the critical value 0.8377 for each case in transonic flow field that is, the free stream Mach number is larger than 0.86015 and the critical Mach number has nearly 0.4. Probably, the critical Mach number 0.4 and the critical value 0.86015 are appropriated for arbitrary bodies.
문성기,김만회 嶺南大學校 工業技術硏究所 1989 연구보고 Vol.17 No.2
Two-dimensional plane stagnation flow is known to be linearly stable to three-dimensional disturbances. This three-dimensional disturbances is propotional to the streamwise-direction distance, not arbitrary disturbances. The purpose of this theoretical study is to show that the same flow destabilized if fluction levels are sufficiently high and arbitrary type. In the present formulation, finite-amplitude disturbances are expanded in terms of the eigenfunctions pertaining to coordinate perturbations. The growing disturbance takes the form of secondary vortice, i.e. vortices more or less parallel to the streamlines. The instability is usually confined to the boundary layer and spacing of the secondary vortices is analysed theoretically for the case of infinitesimal disturbances of the type first sturdied by Gortler and Hammerlin. The third order disturbances grows exponentially above certain critical intensity. The existence of such a threshold is in qualitative agreement with exerperimental studies of secondary vortices arising in flows past blunt bodies.
Azomethine 탄소원자의 친핵성 치환반응 (제 1 보) 물-디옥산 혼합용매중 Aryl N-Aroylchloroformimidate 유도체의 가용매 분해반응
성낙도,권기성,박문규 圓光大學校 1981 論文集 Vol.15 No.1
Kinetic studies on solvolsis reactions of aryl N-aroylchloroformimidate derivatives in 1.4-dioxane-water mixture have been carried out by means of ultra-violet spectrophotometry at 20℃. Results of m values of Grunwald-Weinstein plots(m=0.4~0.8), substituent effect(ρ=0.15), and n values of Kivinen plots(n=0.7~1.2), show that the solvolysis displacement of aryl N-aroylchloroformimidate derivatives proceed via SN₂ mechanism.
문철,이동근,민승기,오승환,김태성 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.3
This clinical study was made of 214 cases of the jaw cysts which were diagnosed histopathologically in the Department of Oral and Maxillofacial Surgery, Wonkwang University Dental Hospital from Jan. 1, 1991 to Dec. 31, 1998. Medical records, radiographs, histopathological reports of 214 cases with jaw cysts were retrospectively reviewed. The results were as follows : 1.Among the total patient of 214 cases, male were 143 cases, and female are 71 cases, male predominated by the ratio of 2.04. 2.The periapical cysts and the dentigerous cyst are the most common cyst, irrespective of 116 cases(54.2%) and 58 cases(27.1%). 3.The periapical cyst has no gender prediction, male were 70 cases and female were 54 cases, the mean ages were 39.3 years(SD=18.4). The most common involving teeth were maxillary anterior teeth(59.7%) . 4.The dentigerous cyst predominantly occurred in third decade (18 cases : 31%), and the mean ages were 31.9 years(SD= 14.8). Dentigerous cysts predominantly occurred in male by the ratio of 7.29 (male : 51 cases, female : 7 cases). Maxillary anterior teeth(43.1%) and mandibular molars(32.8%) were most frequently involved. 5.The odontogenic keratocyst predominantly occurred in second and third decade and mean ages were 23.5 years(SD= 17.2). The mandibular molars(60%) were most frequently involved. 6.All nasopalatine cyst occurred after fourth decade, mean ages were 49.5years(SD= 10.4). In the gender incidence of nasopalatine cyst, 1 case occurred in female and 10 cases occurred in male. 7.In the surgical intervention of jaw cyst, cyst enucleation and marsupialization performed in 156 cases. Cyst enucleation with bone graft performed in 58 cases and iliac autogenous bone grafts most frequently performed in 29cases. 8.The diameter range of cyst enucleation with bone graft were from 15mm to 120mm with a cyst diameter of 33.3mm. (SD = 15.2). The diameter range of cyst enucleation and marsupialization were from 7mm to 82mm with a cyst diameter of 20.4mm.(SD=9.0) The diameter of cyst enucleation with bone graft were significantly greater than diameter of cyst enucleation. (p<0.05) 9.Post-operative complications occurred in 9 cases(15.5%) in which cyst enucleation with bone grafts performed and occurred in 31 cases(19.9% ) in which cyst enucleation.
주기적 온도차가 있는 두 연직 평판사이의 자연대류의 안정성
문성기 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.2
This paper considers stability of natural convection in a vertical slot with periodic temperature by perturbation technique. The Floquet exponents i.e. the complex growth rates of the disturbance to the oscillatory flow are computed in powers of the oscillatory to steady temperature amplitude ratio. It is found that the oscillatory flow is more stable than the steady flow for values of Grashof numker and disturhance wave number in the vicinity o critical values for the stead flow, when frequency of imposed oscillation is larger than about ?? For ?? the unsteady flow is less stable than steady. At very nigh values of imposed oscillation frequency, the oscillating effect to the stabilization is very slight.
과도한 운동으로 발생한 횡문근융해증에 의한 급성신부전증 1예
문철호,류보열,모성환,김태종,기장도,박용관,김용환,정종훈 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1
Rhabdomyolysis may be defined as a clinical and laboratory syndrome which releases muscle cell contents into the plasma, such as creatine phosphokinase, due to skeletal muscle injuries. It can be the result of many diverse causes including muscle disease, ischemia, genetic disorder, metabolic disorder, infectious disease, drugs, comatose state, trauma or vigorous exercise that can lead to acute renal failure as a complication. Since first reported in 1941, rhabdomyolysis-induced acute renal failure has been documented many times, and the major causes of this disease are carbon monoxide poisoning, snake bites, and etc in Korea Reports of acute renal failure after exercise-related rhabdomyolysis with myoglobinemia are rare. We report a case of acute renal failure caused by exercise-related rhabdomyolysis in a 20 year old man.
무한경계를 갖는 두 점성유체 경계면에서의 평행전단 흐름의 불안전성
文晟基 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.2
This paper discusses the linear instability of the cocursent flow of two fluids of different viscosity in an infinite region. We consider the stability of the unbounded flow and instbility that is intrinsic to the inter face, and that does not depend on the presence of rigi boundaries. We solved the problem using perturbation method. It is found that the instability arises at the interface between the two fluids for short wavelength. Sur face tension is always stabilizing, difference in density may be stabilizing or destabilizing.