대동맥 협착증과 동반된 출혈성 위장관 동정맥 기형에서 Estrogen-Progesterone 치료 1예

김도연,김화정,김효정,남준식,박수영,박영미,신정은,주미순,황민규,정혜경,손혜영,이선영,이한주 大韓消化器內視鏡學會 1999 Clinical Endoscopy Vol.19 No.부록2

노년기의 결혼만족도와 관련변인 연구

申涍植,尹英 全南大學校家政科學硏究所 1991 生活科學硏究 Vol.1 No.-

The purpose of this study is to provide the basis for the marital relationship in later life by searching for the most influential variable on marital satisfaction of the aged. The data used in this study include 271 elderly people aged 55 and over. Used statistics for data analysis were T-TEST, ONE WAY ANOVA, SCHEFFE'-TEST,MULTIPLE CLASSIFICATION ANALYSIS. The findings of the study were as follow: 1) The background variables such as sex. educational level, occupational status, perceived health status, economic level, number of children, show significant difference on the marital satisfaction of the aged. 2) The socal network variables (relationship with friend, social activities) show the significant difference on the marital satisfaction of the aged. 3) The value system is the significant variable on the marital satisfaction of the aged. 4) This husband-wife relationship (the degree of communication, sexual relations, affectional expression, consensus with marital partner) show the significant difference on the marital satisfaction of the aged.

네트워크 트래픽 비정상 행위 탐지에 관한 연구

신효영 경복대학 2003 京福論叢 Vol.7 No.-

본 연구에서는 침입 탐지를 위하여 네트워크 트래픽 데이터의 정상 행위에 대하여 엔트로피 메트릭을 적용하여 프로파일링하는 방법을 제안하였다. 정상적인 네트워크 트래픽에 포함된 TCP/IP 상호적인 특성에 대한 값을 정의하기 위해 송신지 IP, 목적지 IP 그리고 송신지 포트 및 목적지 포트 데이터의 빈도에 근거한 엔트로피 값을 계산한다. 이들에 대하여 정상적인 트래픽에서 엔트로피 값이 IP와 포트엔트로피 값이 유사한 분포값을 가지는 것을 확인하였다. 이러한 속성을 근거로 정상 행위 트래픽을 프로파일링 하였고, 실험 데이터에 대한 정상 행위와 비정상 행위 트래픽의 분류실험을 통해서 침입 탐지에 사용될 수 있음을 검증하였다. This study used entropy metric to profile normal network traffic. Normal network traffic has the characteristic of reciprocal TCP/IP. The frequency of each attribute in source IP, destination IP, source port and destination port is input data of entropy calculation. In normal traffic, the entropy value of source IP and destination IP, source port and destination port is equal in normal network traffic. We identified that entropy value is different in normal traffic and abnormal traffic. We tested that acquired threshold classify normal traffic and abnormal traffic. The entropy is valuable as a metric to classify normal or abnormal in traffic data and verified that it can be used in practical anomaly detection.

W-CDMA 망의 보안 취약점 분석과 대책에 관한 연구

신효영 경복대학 2004 京福論叢 Vol.8 No.-

W-CDMA 보안에 대해 지금까지 진행된 연구들은 비밀키를 기초로 한 인증 및 암호 방식을 채택하고 있다 .속도 및 효율성 면에서 비밀키를 이용한 암호 시스템이 현재의 선택이라 할지라도 향후 공개키를 이용한 시스템의 도입으로 확대 개선될 것으로 예상되므로 이에 대한 연구가 필요한 실정이다. W-CDMA 보안 구조에서 제공하는 2 단계 인증 방법은 로밍 상대방들이 서로 신뢰해야하는 암묵적인 신뢰 모델을 전제로 하고 있다. 즉 로밍 가입자의 보안 처리에 관하여 당사자들은 서로 신뢰해야만 하나 이는 위험한 가정일 수 있다. 물론 2 단계 방법이 분산 처리가 가능하고 부하를 분담할 수 있는 장점은 있지만 제 3자에 의한 공격에 취약할 수 있다. 본 연구에서는 이러한 취약점들을 보완하기 위하여 공개키 시스템을 이용한 보안 구조를 설계하고 이를 검증하고자 한다. The study related to W-CDMA security has been focused on common key method. Although the common key system has better performance and speed, it is expected that public key system will be adopted for W-CDMA system in the near future. The two-stage AKA model in W-CDMA assumed implicit trust model which requires trust for each roaming partner. This assumption can result in dangerous situation for security. The two-stage AKA model has an advantage that enables distributed processing and load sharing. But it has vulnerability for third party attack. To complement these vulnerabilities, this study designs security system for W-CDMA which uses public key system.

배전압 회로를 이용한 마이크로웨이브-DC 변환효율 개선에 관한 연구

신동훈,이영철,김태효 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-

본 논문에서는 2.45GHz의 무선전력전송을 위한 마이크로웨이브-DC 변환효율 특성을 나타내는 정류안테나(Rectenna)를 설계 ㆍ 제작하였다. 정류안테나에서 마이크로웨이브-DC 변환효율을 향상시키기 위해서 배전압 회로(Voltage Doubler Circuit)를 사용하여 변환효율을 이론적 ㆍ 실험적으로 분석하였으며 단일 다이오드를 사용하였을 때 정류회로의 변환효율은 약 65%이며, 배전압 회로를 사용했을 때는 약 80%의 변환효율을 보였다. In this paper, we designed the rectenna elements which converts microwave energy into DC for Wireless Power Transmission. We used Voltage Doubler Circuit to improve the converting efficiency of the Rectenna array microwave-to-DC conversion, and analyzed the converting efficiency of the Rectenna both experimently and theoretically. In the case of single diode, we have obtained about 65% conversion of efficiency for the rectifying circuit, and with double diodes has proved about 80% efficiency.

심상성 루프스에서 Nested-Primer Gene Amplification Assay에 의한 결핵균 DNA의 검출

신문석,전효진,김병천,이규석,김재룡,권호준,송준영 啓明大學校 醫科大學 1994 계명의대학술지 Vol.13 No.4

Lupus vulgaris, which is a progressive form of postprimary tuberculosis in patients with a moderate to high degree of immunity and tuberculin sensitivity, is the most common, most serious, and most variable type of cutaneous and mucous membrane tuberculosis. Domonstration of M.tuberculosis directly or in culture in some of these eruptions can be difficult. It is essential to demonstrate the presence of M.tuberculosis in a clinical sample for a definitive diagnosis of tuberculosis. With the discovery of the polymerase chain reaction (PCR), the DNA diagnostic approach for infection has developed in a short period. With the dual purpose of definitive and rapid diagnosis of tuberculosis, this study examined the usefulness of a nested PCR for detection of M. turberculosis. Compared with a single-step PCR, the two-step PCR was able to enhance sensitivity approximately 1,000-fold on the basis of bacterial counts and DNA quantity. We concluded that two-step nested PCR appeared to be the most useful PCR protocol for early and sensitive diagnostic method detecting M.tuberculosis in acid-fast stain negative specimens.

TGA 방법을 이용한 플라스틱과 하수·분뇨슬러지의 열분해 반응속도 연구

윤효숙,최성필,김성탁,원양수,신부영 嶺南大學校 環境問題硏究所 1997 環境硏究 Vol.16 No.2

요약문 도시 고형폐기물의 열분해 특성에 대한 기초 자료를 제시하고자 열중량분석기를 이용하여 가열속도를 실험변수로 하여 하수 및 분뇨슬러지와 5대 범용 플라스틱인 LDPE, HDPE, PP, PS 와 PVC의 열분해 반응속도인자 및 분해특성을 파악하였다. 활성화에너지는 가열속도에 상관없이 일정한 값을 나타내었으며 분해속도가 최고일때의 온도는 가열속도가 증가함에 따라 증가하였다. LDPE, HDPE, PP와 PS는 1단계 분해반응으로 350∼520 ℃에서 대부분이 완전분해되었으며, PVC는 2단계 분해반응으로 250∼550 ℃에서 분해가 진행되었다. 슬러지는 여러 단계의 분해반응으로 특정한 분해구간이 없이 전구간에 걸쳐서 분해가 진행되었다. PVC를 제외한 플라스틱은 완전분해되었으며, PVC는 약 10%의 잔류량이 있었고, 슬러지의 잔류량은 D 하수, S 하수, T 분뇨 슬러지의 순으로 43, 70, 28.5%를 나타내었다.Abstract The thermal decomposition of sewage/night soil sludge and LDPE, HDPE, PP, PS and PVC was studied by using a conventional dynamic thermogravimetric analyzer (TGA) in a flowing nitrogen environment at several heating rates between 5 ℃ and 40 ℃/min. The dynamic thermogravimetric analysis curve was analyzed to obtain the information on the kinetic parameters such as activation energy, reaction order, and Arrhenius preexponential factor. The activation energy keeps constant regardless of heating rates, and the temperature of he fastest decomposition increases with the heating rate. LDPE, HDPE, PP and PS were completely decomposed in the temperature range of 350∼520 ℃ including as the first step decomposition and PVC was decomposed in the temperature range of 250∼550 ℃ including the second step decomposition. Sludge was decomposed without specific temperature range as several decomposition step. Except of PVC, all plastics were decomposed completely. PVC keeps the remains of about 10%, and sludge keeps the remains of 43% for D sewage sludge, 70% for S sewage sludge, 28.5% for T night soil sludge.

청소년의 광고에 대한 태도가 구매행동에 미치는 영향

윤영아,신효식 全南大學校家政科學硏究所 1992 生活科學硏究 Vol.2 No.-

The purpose of this research is to provide some fundamental information for the effective use of advertising of Korean adolescents by analyzing the adolescents' attitude toward advertising and it's information aquisition, influential power, confidence and satisfaction when they purchase some goods and services. The major findings were as follows : 1. There were significant differences about their attitude toward Ad. in accordance with their parents' monthly income level. It tells us that the attitude got better if the income level was getting higher. 2. Purchasing behavior of clothes. 1) We discoverd that information acquisition rate through Ad. were high with girls and students who got fathers in their 40's. 2) The degree of satisfaction and influence got the highest score with the students who had fathers under 40's. 3) In the case of satisfaction degree, it showed the highest points were the fathers of engineers and executives. 3. Shoes purchasing behavior. The points of influence and confidence degree were high with the middle class income level students. 4. In the act of confectionery purchasing behavior. 1) The higher score of information acquisition and influence showed girls, their mothers' age are from 41 to 50 and the higher fathers' educational level. 2) The higher fathers' educational level, the higher score of the confidence. 5. In the act of purchasing drink. 1) The higher degree of influence showed higher fathers' educational level and larger income level of their home. 2) The school boys, higher educational level of their fathers and were being middle level of their income, the higher degree of confidence. 6. Through doing the Regression Analysis to see the relationship between the general attitude and purchasing behavior about Ad. The judgement degree influences a lot upon the satisfation degree by Ad. when people buy things, on the other hand, it couldn't effect on the interest and need degree. This results are very suggestive of problems related to Ad., so we need to educate adolescent consumer and ask enterprisers to consider their responsibility and morality.

성장호르몬과 프로락틴을 분비하는 뇌하수체 선종이 동반된 Albright증후군 1예

오효정,김용성,신진호,김하영,박병현,조정구 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.1

Zn-Fe 합금 도금강판의 점용접성에 관한 연구

민준기,신재경,안효영,서수정,서창제 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.1

Spot welding is widely used in automobile assembly lines. Electroplating of Zn-Fe on steel sheets is increasingly used in assembly lines, because of its good spot weldability, formability and corrosion resistance. In this study, to evaluate spot weldability, tensile shear strength and cross tensile strength of steel sheets electroplated with Zn and Fe up to 0.7mm thickness were investigated, and these mechanical properties were compared with those of steel sheets electroplated with Zn only. The thickness of electroplated steel sheets was measured with SEM. The following conclusions were obtained. (1) In spot welding, the weldability lobe was getting wider and directed toward low currency direction, in steel sheets electroplated with Zn-Fe compared with those electroplated with Zn only. (2) Electrode force and welding time obviously affected the ultimate welding strength, and the range representing constant ultimate welding strength was observed. (3) When Zn-Fe were electroplated on steel sheets, the ductility ratio was increased in optimal welding condition, indicating that good weldability was obtained. (4) Around 8.5KA where optimal strength existed, by spot welding, the amount of the electroplated layer was observed to be reduced by approximately 15% in thickness.