골격성 Ⅱ급 부정교합자의 악교정 수술 후 설골의 위치와 상기도 변화에 관한 연구

배진성,김경호,박형식,허종기,박광호 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

OSAS(obstructive sleep apnea syndrome) is becoming more and more of importance nowadays. Therefore the study concerning OSAS is very important. Most of the studies which have been reported were comparison of upper airway size and change of skeletal class Ⅰ group and skeletal class Ⅲ group respectively. But, most of the showing OSAS have pharyngeal narrowing combined with more or less distinct maxillary and mandibular deficiency. Therefore the aim of this study is to see posterior airway space and hyoid bone position in patients affected by class Ⅱ malocclusion and treated with orthognathic surgery. we measured the lines between selected upper air way landmarks on lateral cephalometric x-ray films of skeletal class Ⅱ 30 persons who had not been operated yet, were within 2 weeks after operation, were 6 months after operation. And we compared them respectively and analyzed them with pairing t-test, pearson correlation coefficient and multiple regression analysis. The results were as follows. First of all, skeletal class Ⅱ group was increased in all the level of PAS, especially PAS(MK) and PAS related to hyoid bone(H-phW, H-PhW(Me-H)) was significantly decreased within 6 months after operation but that was larger than preoperation. And then the PAS was increased after mandibular advancement surgery. While there was no significant correlation between PAS and surgical methods, there was statistical significance between PAS and a number of surgical movement. At last, the hyoid bone was advanced within 2 weeks after operation but relapsed within the follow up period. In the end of the study, it was turned out that PAS was always wider without distinction of the region after the operation and that there was significant correlation between the moving volume of hard tissues and the changing quantity of PAS( ; how much PAS was changed according to the moving degree of hard tissues). After this, to be based on the study, I consider that OSAS demands further study and that it is necessary to do more practical applications to the patients.

감염 근관의 흑색세균의 동정

배광식,임성삼,정기수 大韓齒科保存學會 1999 Restorative Dentistry & Endodontics Vol.24 No.3

네트워크 상에서의 실시간 물류정보관리에 대한 설계

배상현,오창윤,양성기,최길환,이광옥 조선대학교 지역사회발전연구원 1999 地域發展硏究 Vol.3 No.1

본 논문은 네트워크를 이용하여 인터넷 상에서 물류정보관리를 실시간으로 설계하고 이를 구현하고자 한다. LIS에서는 현재 도로수송에 편중된 화물운송 구조를 모델로 철도, 해운, 항공 등으로 물류정보 시스템망을 효율적인 정보시스템을 구축하여 크게 기업과 개인을 구성된 고객집단과 물류운송을 담당하는 운송회사 또는 화물운속조합으로 구성된 운송자 집단들 사이의 신속하고 효율적인 정보 제공을 통한 최적의 물류의 흐름을 담당하는 물류관리 설계를 목표로 하고 있다.

인터넷상에서 Ontology를 이용한 정보의 분류와 획득을 위한 지능형 에이전트의 설계

양성기,이광옥,최길환,오창윤,배상현 조선대학교 통계연구소 2000 統計硏究所論文誌 Vol.2 No.1

In this paper, we propose a new method of information gathering and text classification based on Internet. The number and diversity of information resources on the internet is increasing rapidly. As more information become available on the internet, it becomes increasingly difficult to acquire knowledge we need. A number of tools are available to help people search for the information they need. However, These tools are unable to interpret the result of their search due to lack of knowledge of domain. We need more intelligent system which facilitates personal activities of producing information such as surveying, writing paper and so on. We Implemented a system called ⅡRS(Intelligent Information Retrieval System) which helps people to acquire knowledge form information resources on the internet by gathering information and classification texts. It specifies the common background knowledge shared by the user and ⅡRS, allow ⅡRS to make inexact match between the user's request and the candidates, assigns user-oriented categories. We tested ⅡRS for gathering pages on the WWW and classification articles on the network news. The result of the experiments indicated that the ontology based approach enable us to use heterogeneous information resources on the internet.

Fluoroquinolone계 항균제의 penicillin 내성 폐렴구균(Streptococcus pneumoniae)에 대한 항균력 비교

이광준,배송미,황규잠,이영희,김기상 대한화학요법학회 2002 대한화학요법학회지 Vol.20 No.3

목적 : 최근들어 penicillin 내성 폐렴구균의 급속한 증가와 전세계로의 확산은 심각한 문제를 야기하고 있다. 1990년대 들어 그람음성 세균뿐 아니라 그람 양성 세균에 대한 항균력이 향상된 많은 fluoroquinolones계 항균제의 개발에 힘입어 폐렴구균성 감염질환 치료시 사용이 증대되고 있으며 한편, 이와 더불어 이미 fluoroquinolone계 항균제에 대한 내성을 보이는 폐렴구균에 대한 보고가 증가하고 있는 실정이다. 이에 본 실험에서는 국내 임상 분리 폐렴구균 중 penicillin에 고도내성을 보이는 균주를 대상으로 하여 fluoroquinolones계 항균제에 대한 감수성 여부를 확인하고자 하였다. 방법 : 항균제 감수성 검사는 3% 말혈액이 첨가된 Mueller-Hinton broth를 사용한 액체배지 미량희석법을 이용하여 NCCLS에서 제시한 방법에 준하여 실시하였다. 결과 : MIC_90를 기준으로 하였을 때 본 실험에서 사용한 5가지의 fluoroquinolones계 한균제 중 gatifloxacin과 moxifloxacin(MIC_90, 0.5㎍/㎖)이 ciprofloxacin (MIC_90, 4㎍/㎖), levofloxacin (mic_90, 2㎍/㎖) sparfloxacin (MIC_90, 1㎍/㎖)에 비해 penicillin 내성 폐렴구균에 대한 항균력이 높게 나타났다. 결론 : 5가지의 fluoroquinolones계 항생제 중 최근들어 새로이 개발된 항생제인 moxifloxacin과 gatifloxacin이 ciprofloxacin, levofloxacin, sparfloxacin보다 폐렴구균에 대한 더 우수한 항균력을 가지고 있음을 확인하였다. 한편, 국내 페니실링 고도 내성 폐렴구균에서 fluoroquinolones에 대한 고도 내성을 보이는 균주의 출현은 fluoroquinolones 내성 균주의 급속한 증가와 확산에 대한 지속적인 감시와 대책 마련이 요구된다. Background : Recently the rapid increase and global spread of penicillin-resistant S. pneumoniae has become a serious problem. In the 1990s, a varisty of novel fluoroquinolones with enhanced activity against gram-positive bacteria have been developed and used for the treatment of pneumococcal infections. In such situations, the fluoroquinolone-resistance in S. pneumonaie has been reported from many countries. In this study, we compared the activity of ciprofloxacin, levofloxacin, sparfloxacin, gatifloxacin and moxifloxacin against 93 isolates of S. pneumoniae which were highly- resistant to penicillin (MIC 2~8㎍/㎖). methods : Antimicrobial susceptibilities were determined by the broth microdilution method in cation-adjusted Muller-Hinton broth supplemented with 3% lysed horse blood according to the guidelines of the National Committee for Laboratory Standards (NCCLS). Results : Based on MIC_90s, sparfloxacin and moxifloxacin were the most potent fluoroquinolone tested against penicillin-resistant S. pneumoniae and retained excellent activity comparable with ciprofloxacin and levofloxacin. The rank order of bactericidal activity was ciprofloxacin (least active)《 levofloxacin 〈 sparfloxacin 〈 gatifloxacin and moxifloxacin (most active). Conclusion : In this study, the newer fluoroquinolones (moxifloxacin, sparfloxacin)showed improved activity over that observed with ciprofloxacin, levofloxacin, and sparfloxacin. The emergence of highly resistance to fluoroquinolones among penicillin-resistant pneumococci in Korea call for continuous attention and strategies to prevent rapid increase and spread of these strains.

폐쇄성 수면무호흡증 진단을 위한 두부규격 방사선사진 계측 분석에 의한 한국 성인 정상교합자의 정상치에 관한 연구

박광호,김경호,최희수,허종기,배진성 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.1

Purpose : The lateral cephalometric Korean norms of the skeletal and pharyngeal dimension were analyzed for the diagnosis of obstructive sleep apnea syndrome(OSAS). Materials and Methods : The lateral cephalometric radiographies were taken in male(n=53) and female(n=50), who had a normal profile, class I occlusion, normal ANB (0∼4˚) and normal Wits Appraisal(-4∼0mm). The X-rays were traced by two oral and maxillofacial surgeons twice. The significant differences between male-female and examiners were tested. Results : The angle of mandibular line to Nasion-Sella line was 31.12˚/33.79˚(in male/in female, p=0.0018). The lower Gonion angle was 73.74˚/73.74˚(p=0.9978). The length of the soft palate was 36.93mm/34.35mm(p=0.0002). The pharyngeal airway space was 13.42mm/11.55mm at mandibular plane level(PAS(ML))(p=0.0025). The hyoid was placed inferiorly to mandibular plane 10.18mm/7.72mm(p=0.0051). The results from this study are to be used for the diagnosis of OSAS.

분무유동장에 미치는 선회류의 영향에 관한 수치해석적 연구

洪起培,張光鎭,金夏永 忠州大學校 1996 한국교통대학교 논문집 Vol.31 No.1

The swirl effect is very important parameter in the oil buner spray field. In this study, it was study of the cdmputer simulation about swirl effect When the size of spray angle of nozzle, spray pressure of nozzle, pressure of combustion chamber and buner tube were fixed. The swirl generation parts size were at intervals of 2.2mm, 2.7mm, 3.2mm. The pty flow was mixed well at 2.7mm. If we are able to got the experimerntal data. The study of comparision between experimental data and computer simulation results is possible. And then we can construct the data base about design parameters of holder.

무선 애드 혹 기반 액티브네트워크상에서 QoS지원에 관한 연구

李基源,裵振勝,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - In this thesis, we propose a QoS supporting method on wireless ad hoc-based active network for improving reliability. On the loss of route path, the existing DSR routing protocol has several problems with wireless network communication because of decease of data reception rate and increase of network load. The proposed method improves reliability of data transfer by using functions of active network. That is, by using functions of active nodes and active packets, the proposed method supports QoS with reservation transfer method that saves data packets on transfer at intermediate nodes with lost path and then re-transmit the packets after route reconfiguration.

임베디드 시스템에서 Mobile IP 프로토콜 구현

宋東勳,裵振勝,鄭燦赫,吳世德,李基源,劉忠烈,河載承,李光培,金玄郁 명지대학교 산업기술연구소 2005 産業技術硏究所論文集 Vol.24 No.-

With rapid growth of the internet, need for the mobile communication networks is increasing. In this paper, we implement and test Mobile IP Protocol in Embedded System. Our Mobile IP-based testbed consisted of two sub-networks and each sub-network was configured to operate independently through use of router. To satisfy integrated wired/wireless network model established on the testbed design and show generality of the testbed, we implemented mobile nodes, home agent, foreign agent and router on the basis of Linux operating system. As the results of the evaluation, we confirmed that mobile nodes operated properly according to Mobile IP Protocol.

GMAHN 환경에 적응하는 에러 복구기능을 이용한 AODV 라우팅 프로토콜

정찬혁,오세덕,배진승,이기원,장양근,이광배,김현욱,유충렬,하재승 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-

Mobile nodes in ad hoc mobile networks typically communicate over wireless channels and are capable of movement. These are networks that support multihop communication and can be formed on a temporary basis. This paper proposes a solution that allows mobile nodes to access the wired Internet and to roam from base station to base station. And we also develop the efficient method that adapts in Global MANET which can be changed over time. It is observed that we can reduce not only error detection time but also network load, thus increasing the data reception rate in Global MANET Environment.