전국 10개 종합병원 중환자실 환자의 직장내 Vancomycin-resistant Enterococci(VRE) 보균율, 보균의 위험요인 및 유전적 다양성 조사

정희진,송준영,엄중식,김우주,최선주,최정현,이혁,정문현,이광미,신동현,손보라,최종성,우흥정,권정아,이경원,최강원,박승철 대한감염학회 2002 감염 Vol.34 No.5

GPS측량에 의한 차량주행지도작성

최철웅,장용구,강인준 釜山大學校 都市問題硏究所 1996 都市硏究報 Vol.4 No.-

In Pusan city, more and more efficient car management is needed for insufficience of accomdating road abilitys. GPS being a global navigation and positioning system works under any kind of weather and no visibility requirement in addition to highly accurate three dimensional positioning information, so tremendous impact from GPS has occureed. Using the position and time data of GPS, we can analyze the velocity of car and utilize GPS data for monitoring statistics and traffic capability of the road. Because of storing capacity the position of car GPS data, we can analyze the navigation path of car. Therefore we will effectively use road resource by GPS data. In this study, we developed programs that could monitor the map of car-navigation, analyze distribution of velocity and traffic management by GPS.

설측브라켓 부착시 위치오차에 관한 연구

최준규,황현식,김종철 대한치과교정학회 1998 대한치과교정학회지 Vol.28 No.1

본 연구는 설측브라켓 부착시 부착방법에 따른 위치오차를 알아보기 위하여 시행되었다. 교정환자 20명의 초진시 석고모형을 연구대상으로 하여, 초진모형의 각 치면에 긴밀하게 브라켓을 부착하는 방법, 치아재배열을 시행한 후 치면에 긴밀하게 부착하는 방법 그리고 치아재배열을 시행하고 이상호선을 제작한 후 브라켓을 결찰하여 부착하는 passive bracketing의 3가지 방법으로 브라켓을 부착한 후 각 방법으로 부착된 브라켓의 위치오차를 측정 및 비교하여 다음과 같은 결과를 얻었다. 1. 각도오차 분석결과, 치아재배열을 시행하지 않은 경우 상악 제1소구치와 하악견치의 위치오차가 타 방법에 비하여 크게 나타났으며, passive bracketing을 시행하지 않은 경우 상악 중절치, 하악 제1·제2소구치에서 그 위치오차가 크게 나타났다. 2. 토크오차 분석결과, 치아재배열을 시행하지 않은 경우 하악 제2소구치의 위치오차가 타 방법에 비해 크게 나타났으며 passive bracketing을 시행하지 않은 경우 상악 전 치아와 하악 제1·제2소구치에서 그 위치오차가 크게 나타났다. 3. 회전오차 분석결과, passive bracketing을 시행하지 않은 경우 상악 중절치간, 하악 중절치간, 하악 측절치와 중절치사이 그리고 하악 견치와 측절치 사이에서 그 위치오차가 크게 나타났다. 4. 내외오차 분석결과, passive bracketing을 시행하지 않은 경우 상악 견치와 측절치 사이에서 위치오차가 타 방법에 비해 크게 나타났으며, passive bracketing을 시행하지 않은 경우 상악 중절치간, 측절치와 중절치 사이, 제1·제2소구치사이, 하악 측절치와 중절치 사이, 견치와 측절치 사이에서 그 위치오차가 크게 나타났다. 본 연구 결과는 설측교정술의 경우 브라켓 간접부착 술식을 사용하더라도 상당량의 위치오차가 나타나며, 이는 passive bracketing으로 줄일 수 있음을 시사하였다. The purpose of this study was to evaluate the positioning errors according to the method of bonding lingual brackets. Dental models of twenty orthodontic patients with malocclusion were selected for this study. The positioning errors were measured on each model that brackets were bonded to. Three different bonding methods were used. For the first method, the bracket was bonded intimately to the lingual surface of the model. For the second method, the bracket was bonded intimately to the lingual surface after setting up using articulator. The passive bracketing, bonding the bracket ligated first to ideal archwire, was used after setting up as the last method. The results were as follows: 1. The brackets bonded without setting up showed greater angulation errors in the upper 1st premolar and the lower canine than those in other bonding methods. The brackets bonded without passive bracketing showed greater positioning errors in upper central incisor, lower 1st and 2nd premolars. 2. The brackets bonded without setting up showed greater torque error in lower 2nd premolar than those in other bonding methods. The brackets bonded without passive bracketing showed greater torque errors in all upper teeth, lower 1st and 2nd premolars. 3. The brackets bonded without passive bracketing showed greater rotation errors between upper central incisors, lower central incisors, lower lateral and central incisor, lower canine and lateral incisor. 4. The brackets bonded without setting up showed greater in-out errors between upper canine and lateral incisor than those in other bonding methods. The brackets bonded without passive bracketing showed greater in-out errors between upper central incisors upper central and lateral incisors, upper 1st and 2nd premolars, lower lateral and central incisors, lower canine and lateral incisor. These results suggest that there is a large amount of positioning error in lingual brackets even by an indirect bonding technique, and it may be reduced by passive bracketing.

사람 성상세포종 세포주에서 사이토카인에 의한 Fas 및 FasL mRNA의 발현 조절

김옥준,임정희,최철희,최인홍,이병인,최일생 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

폴록사머를 이용한 디클로페낙 고형 좌제의 개발

용철순,오유경,김정애,김용일,박상만,양준호,이종달,최한곤 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.2

To develop a poloxamer-based solid suppository with poloxamer mixtures, the melting points of various formulations composed of P 124 and P 188 were investigated. To investigate the effect of poloxamer to the dissolution and dissolution mechanism of diclofenac sodium from the suppository the dissolution of diclofenac sodium delivered by the poloxamer-based suppository was performed. Furthermore, to investigate the mucoadhesive property of the poloxamer-based solid suppository, the identification test in the rectum was carried out after its rectal administration in rats. The poloxamer mixtures composed of P 124 and P 188 were homogeneous. Very small amounts of P 188 affected the melting points of poloxamer mixtures. In particular, the poloxamer mixture [P 124/P 188 (97/3%)] with the melting point of about 32℃ was a solid form at room temperature and instantly melted at physiological temperature. Furthermore, very small amounts of P 188 in the poloxamer-based suppository hardly affected the dissolution rates of diclofenac sodium from the suppository. Dissolution mechanism analysis showed the dissolution of diclofenac sodium was proportional to the time. At 4 h after administration, the blue color of poloxamer-based suppository [diclofenac sodium/poloxamer mixture (2.5/97.5%)] with the P 124/P 188 ratio of (97/3%) and blue lake in the rectum was faded. However, the position of suppository in the rectum did not significantly change with time. Thus, it retained in the rectum for at least 4 h. Our results indicated that the poloxamer-based solid suppository with P 124 and P 188 would be a candidate of rectal dosage from for diclofenac sodium.

스마트 안테나에서 블라인드 기법을 이용한 Two Dimensional RAKE 수신기

박형준,이철형,최명수,김경호,이성로 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-

Smart antennas technique is the scheme that focuses the signal on the desired user using array antennas. Therefore, the scheme can dramatically improve performances in conventional mobile communication systems. The scheme is the newest technique for beamforming. Its specific function combines antenna arrays with digital signal processing techniques that can control signal direction. Now, the scheme is known as the future generation core technique in communication provider communities. In this paper, we propose two dimensional rake receiver based on blind schemes in smart antennas and then compare the performance of the proposed scheme with that of the conventional scheme. Computer simulation results show that the proposed scheme outperforms the conventional scheme.

Hemophilia 환아의 관혈적 치과치료에 관한 증례보고

이준균,이긍호,최영철 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.4

혈우병은 성염색체 열성 유전양식에 따라 유전되는 출혈성 질환으로서 응고인자의 결핍이나 결손에 의해 혈액응고 시간이 지연되게 된다. 과거에는 혈우병 환자의 치과치료시 과다출혈의 위험성 때문에 치과시술을 위해서는 입원하여 내과 전문의나 혈액 전문의가 출혈을 조절하도록 하여 치료하는 것이 바람직한 것으로 여겨졌으나, 최근의 혈액응고기전에 대한 이해와 의료기술 발전에 의해 출혈을 좀더 효과적으로 조절할 수 있게 되었다. 본과에 내원한 혈우병 B, 중증과 혈우병A, 중증에 해당하는 환아에서는 관혈적인 치과치료를 시행하여 각각의 과정 및 치료 원칙에 관하여 다음과 같이 보고하는 바이다. 1. 혈우병 환자의 치료시에는 반드시 환자의 내과, 소아과 또는 혈액 전문의와 상의하여 긴밀한 협조하에 치과 치료를 시행하도록 한다. 2. 환자의 치료방법은 환자의 전신상태와 협조도 및, 필요한 시술의 위험성 정도에 따라 결정하도록 한다. 3. 치과치료의 전과 후에 혈액응고인자의 투여 등으로 발생하는 불편과 합병증의 기회를 최소로 하기 위해 치료를 위한 내원 횟수를 가능한 한 줄여주는 것이 바람직하며, 치료시 에는 감염을 예방하고 지혈을 도울 수 있는 치료를 시행해야 한다. With the progress of medical treatment techniques of bleeding control, dental care of the patient with hemophilia has become more convenient. So many surgical treatments can be performed with out-patient. 2 cases of intraoral surgical treatment of children. one with hemophilia B, sever, the other with hemophilia A, severe. While the former was treated under general anesthesia, the latter was treated under local anaesthesia. There are principles: 1.When a patient with hemophilia need dental treatment, the dentist must consult to his physician, pediatrician, or hematologist before dental treatment. 2.When the dentist make a treatment plan, there should be consideration of the general condition, cooperation of the patient and risk of the treatment needed. 3. Minimize the number of times of coming for dental treatment so that reduce the times that need replacement therapy of coagulation factor. And during the treatment, dentist should care of infection and bleeding.

GIS와 유전자 Algorithm을 이용한 유지관리를 고려한 최적노선 선정

이철승,강인준,이준석,최현 釜山大學校 都市問題硏究所 2002 都市硏究報 Vol.13 No.-

Maintenance of roads is important thing and it should be considered in the plan of the road design process. Optimizing some road design characteristics in the plan may reduce road maintenance costs over the life of the road. Maintenance costs are relevent to sideslopes, cross section, and annual average daily traffic. Road can be chosen to minimize these costs, focusing on those conditions. Genetic algorithm, which is a good technic about optimization problem, is used to optimize those of characteristics. The purpose of this study is to choose a road by optimizing these characteristics. It was selected automatically by using GIS and GA and the result shows that sideslopes have influence on choosing optimal road relevent to maintenance.

체지방 측정기(Futrex-1000 body fat tester)로 측정한 소아의 체지방율에 관한 연구 : 학동기와 청소년기 아동을 대상으로

박상철,이동환,신상만,이상주,박준수,최석민,안재억 순천향대학교 1992 논문집 Vol.15 No.2

Using the infrared interactance(NIR method), the percentage body fat in 1,401 Korean children, aged 6-18years, was evaluated for normal and standard values. Correlation of percentage of body fat with age, weight, height, overweight(%), Kaup index and Rohrer index was also analyzed. The following results were obtained ; 1) In all the subject, weight and height showed standard growth(50-90 percentile) compared to growth data of korean children. 2) The percentage of body fat was decreased with increasing age and was measured higher in female than male. 3) The percentage of body fat was decreased with increasing height in both sex. 4) The percentage of body fat correlated negatively with age, heght, weight in both sex. In boys, the Rohrer index appeared to have a significant positive correlation with the percentage of body fat. (r=0.52454) In girls, the overweight(%) appeared to have a significant positive correlation with percentage of body fat. (r=0.56994) The Kaup index had no correlation with the percentage of body fat. This NIR method is safe, non-invasive, rapid, easy to use, and may be useful predict percentage of body fat, especially in the mass screening.

질소레이저의 개발에 관한 연구

梁俊默,琴彩,崔哲圭 충남대학교 기초과학연구소 1983 연구논문집 Vol.4 No.-

We have studied a Blumlein nitrogen laser which can be operated with a high stability. This has been obtained from a laser tube powered by a pulse forming network in the form of a parallel plate transmission line with low impedance. The energy storage capacitor and the transmission line are constructed with 0.05㎜ thick Al plates and 0.189㎜ thick Mylar films ; their capacitance is 90 ㎋ identically. The water cooled electrodes with separation of 0.3㎜ are 66㎝ in length and connected to the storage capacitor and the transmission line respectively. The best lasing action of the nitrogen laser is observed at laser tube pressure of 12 Torr, charging voltage of 3050 Volts, the repetition rate 28 ㎐, and the spark gap-separation of 7.4㎜. (with the electrode separation 0.3㎜). In this circumstance, the value of E/p is about 847 Volts·㎝^-1·Torr^-1 which is about eight times as large as the values that have been reported by the previous authors.