한국성인 정상교합자와 부정교합자의 연조직 측모에 관한 두부방사선 계측학적 비교연구

강홍구,윤태호,황성,정호균 중앙대부설한국의과학연구소 1991 한국의과학 Vol.23 No.4

비동기식전송모드(ATM)망에서 흐름제어 셀 다중화기

강구홍 서원대학교 응용과학연구소 2001 응용과학연구 Vol.10 No.1

Since First-Come-First-Served discipline makes it is difficult to satisfy the diverse quality of service(QoS) requirements for each connection, traffic isolation has been proposed for guaranteeing the desired QoS throught explicit bandwidth allocation to each virtual connection(VC) in ATM networks. For this purpose, we propose a rate-controlled cell multiplexer using a simple "periodic token-based regulator" per-VC the proposed multiplexer realizes VC isolation, while still operating work-conservingly. We first discuss its major properties, and then examine its features with respect to the characteristics of the output traffic streams and the traffic isolation of individual VC's. We also propose some variants schemes to accommodate the constant bit rate or best-effort services.

차단교정치료 일례

강홍구,이흥상 중앙대부설한국의과학연구소 1982 한국의과학 Vol.14 No.3

고속망 적합한 NP 기반 인-라인 모드 IDS에 관한 실험

강구홍 서원대학교 미래창조연구소 2004 과학과 문화 Vol.1 No.1

In this paper we propose an In-Line mode network intrusion detection system (NIDS) using Agere network processors, which supports the packet payload inspection to detect the malicious behaviors of attackers based on the well-known attack signatures from Snort, the traffic metering to gather the diverse network traffic statistics via network monitoring, and the packet filtering to protect some specific traffic via access control list. In particular, the mentioned three functions should be done wire-speed under two giga-bit ethernet ports so that we can prevent the intrusions in real-time. We use an industrial PC platform with an x86 processor running Linux, two Gigabit Ethernet ports, and Agere PayloadPlus (APP) 2.5G NP solution. In this prototype system we adapt a two-level searching scheme for guaranteeing fully the wire-speed intrusion detection operation and getting rid of the weakness of In-line mode NIDS, which separates the packet forwarding and the packet payload inspection. We believe this paper describers the approach and presents a first experimental evaluation of NP effectiveness for NIDS.

회복실에서 Pulse Oximeter를 이용한 산소포화도의 지속적 감시

강태훈,구길회,양홍석,최병권 중앙대부설한국의과학연구소 1991 한국의과학 Vol.23 No.3

Java Media Framework API를 이용한 방송시스템 구현

강구홍 서원대학교 응용과학연구소 2003 응용과학연구 Vol.12 No.1

Due to the increasing number of real-time multimedia stream type applications like Internet TV, there has been renewed interest in multicast protocols that can reduce the network load greatly compare to the unicast ones. In this paper, we have designed and implemented an IP multicast broadcasting system for these applications especially for On-Air broadcasting and video on demand services. The IP multicast model allows scalable and efficient multi-party communication. However, deployment of IP multicast requires substantial infrastructure modifications for widespread deployment of IGMP and routing protocols as well as complex modifications to IP router's software. Motivated by these programs, we have proposed a limited IP multicasting approach which only supports a local multicasting relying on the multicasting server. We have implemented a client and a server program by Java Media Framework API. In particular, the server program can be running on a web server so that the multicasing server can be implemented on an embeded system and we manage the multicasting server via Internet at remote site. This web server base approach also allows us to manage the media contents separately from the multicasting server system.

이동무선채널에서 1-비트 차동검파를 갖는 CPM의 성능 향상

陳年鋼,方成日,姜洪求 단국대학교 1993 論文集 Vol.27 No.-

In this paper, the performance of constant envelope digital CPM with 1-bit differential detection has been analyzed in time selective fading AWGN channels. The analysis is based upon the canonic receiver model combining postdetection for performance enhancement. In radio mobile communication channel with AWGN and fading, it is shown that the diversity receiver is effective in decreasing influence of the AWGN and the fading. Among the CPM schemes, the performance of 2SRC is found to be the best. The 3RC and GMSK(B_iT=0.25) performances are quite close and 2RC and 2SRC performances are quite close.

일부 산모에서 산모혈, 제대혈, 모유 및 태반에서의 환경 에스토레겐성 화합물(PCBs) : Environmental estromgen compounds(PCBs) in Maternal Blood, Cord Blood, Human Milk and Placenta of Korea women

이강숙,임현우,노영만,구정완,조재천,박정일,김진홍 가톨릭대학산업의학센타 산업의학연구소 2003 韓國의 産業醫學 Vol.42 No.2

The production and intensive use of organochlorine chemicals, both in agriculture and industry, have led to wide spread contamination of the environment. There may be biological effects of organochlorine contaminated breast milk even when levels are below those concentrations that are currently regarded as tolerable. To evaluate the exposure of to fetus PCBs, we measured the sum of 13 congeners of PCBs in maternal blood, cord blood, breast milk and placenta of 30 Korean women by gas chromatograpy/electron capture detector. The concentration of total PCBs of maternal blood, cord blood and breast milk were 7.16±4.29 ㎍/ℓ, 5.16±3.12 ㎍/ℓ, 1.77±2.87 ㎍/ℓ respectively and they have no significant correlation. PCBs in placenta was not defected. However there were no significant differences of PCBs according to age, education, body mass index, parity, breastfeeding, smoking and drinking.

근로자 건강증진전략을 위한 행동변화에 대한 요구도 평가

이강숙,임현우,구정완,홍현숙,이정민,이원철,박정일,맹광호,M, O'Donnel 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.4

Objectives : In order to evaluate the stage of behavior change for health promotion strategy in workplace Methods : Questionnaire survey was carried out for 309 workers who employed in H Electronics company in Kyong-in area from September to October 1998. Results : According to need assessment of four step such as precontemplation stage, contemplation stage, action stage, maintenance stage which were to change of behavior for health promotion, the percent for quitting smoking were observed 48.8%, 43.1%, 8.1%, 0%, and for the restriction of drinking were 29.8%, 10.6%, 9.3%, 5.3%; for fitness 11.1%, 31.0%, 37.3%, 20.6% in male 26.6%, 27.8%, 26.6%, 19.0% in female, for regular diet 26.1%, 19.8%, 38.7%, 15.3% in male, 27.8%, 22.2%, 40.0%, 10.0% in female and for stress management 5.8%, 10.6%, 8.7%, 75.0% in male, 13.6%, 22.7%, 19.7%, 44.0% in female. In heavy smoker(p=0.017) and heavy drinker,(p=0.021) the percent of precontemplation stage was significantly higher than in lower drinker and light smoker. Conclusions : This study suggested that company support for health promotion in workplace was and workers of high risk group for smoking and drinking were in precontemplation stage. So before conducting the health promotion program, health risk appraisal and need assessment for stage of behavior change should be taken for the efficient health promotion strategy.

小兒 알레르기性 紫斑症

金洪培,孫璨洛,姜德植,具滋薰 慶北大學校 醫科大學 1982 慶北醫大誌 Vol.23 No.2

저자는 1977년 1월부터 1982년 8월까지 5년 8개월간 경북의대 부속병원 소아과에 알레르기성 자반증으로 입원하였던 환아 36예를 대상으로 하여 다음과 같은 성적을 얻었다. 성별 분포는 남녀 각각 50%로서 차이가 없었고 계절별 분포는 상기도감염이 빈번한 봄, 겨울이 72.2%를 차지하였으며, 선행질환으로서는 상기도 감염이 69.4%에서 인지되었고 알레르기성 병력을 가진 환아는 13.9%였다. 임상증상은 피부병변이 100%, 위장관계 증상이 88.9%, 관절증상이 61.1%에서 나타났었다. 신장침범은 33.3%였으며 현미경적 혈뇨가 1예, 현미경적 혈뇨 및 경도의 단백뇨가 3예, 현미경적 혈뇨 및 심한 단백뇨가 2예였다. 육안적 혈뇨 및 경도의 단백뇨는 1예, 육안적 혈뇨 및 심한 단백뇨는 4예가 있었으며, RPGN이 1예였다. 이중 6예에서 신생검을 시행하였으며, 2예는 경도의 병변을 보였고 나머지 4예는 모두 반월체를 형성하는등 심한 병변을 보였다. RPGN 경과를 취한 1예는 사망하였다. 신침범과 이와 관련된다고 생각되는 인자들, 즉 5세 이상의 연령군, 성별, 위장관증상의 경중, 관절증상의 유무, 재발유무 등과의 관계를 살펴본 결과 신침범을 일으킨 환아에서 심한 위장관증상 및 재발율이 다소 높게 나타났으나, 통계적 처리로서는 특별한 의의가 없는 것으로 나타났다. A clinical observation has been made on 36 children with Henoch-Scho¨nlein perpura who were admitted to pediatric department of KNU hospital from January 1977 to August 1982. Rate of male to female patients was 1:1, and the majority of cases developed illness during spring and winter months. URI was noticed as preceding illness in 69.4% of cases, and allergic history was elicited in 13.9%. Clinical manifestations showed involvement of skin in 100%. GIT in 88.9%, joint in 61.9% and kidney in 33.3%. Out of 12 cases in whom nephritis developed, 1 case showed microscopic hematuria, 3 cases microscopic hematurai with mild proteinuria, 2 cases microspic hematuria with heavy proteinuria, 1 case macroscopic hematuria with mild proteinuria, 4 cases macroscopic hematuria with heavy proteinuria and 1 case RPGN. Percutaneous renal biopsy performed on 6 cases revealed minimal change in 2 cases and severe renal involvement with crescent formation in 4 cases. Relationship between renal involvement and other parameters including age grou over 5 years, sex, severity of GIT symptoms and presence of recurrence showed somewhat high incidence of severe GIT involvement and presence of recurrence in patients with renal involement. However statistical analysis showed no significant difference.