환경친화형 수분산성 불소 아크릴레이트 공중합체에 의한 섬유 표면개질

유수용,김정두,문명준,서차수,주창식,이민규 한국환경과학회 2004 한국환경과학회지 Vol.13 No.10

Waterborne fluorinated acrylate copolymer (WFAC) for surface modification of textile was synthesized from perfluoroalkyl ethyl acrylate, octadecyl acrylate, glycidyl methacrylate, surfactant and 3,3 methyl-methoxy butanol. The structures of the synthesized WFAC were determinated by FT-IR and ^(19)F-NMR analysis. The thermal stability investigated with DSC and TGA was decreased with increasing the content of fluorinated acrylate in the copolymer. However, the particle sizes of WFAC were increased with increasing the content of fluorinated acrylate in the copolymer. The surface energies calculated by contact angles of WFAC were in the range of 29.80~3.41 dyne/cm. On the observing SEM of the textile surface treated with WFAC, the textile was swollen and compacted with increasing the concentration of water repellency agent. WFAC synthesized in this study showed a good water repellency.

SNMP 기능확장을 통한 Network 성능 향상에 관한 연구

유성진,김중태,조영주,정일용 조선대학교 전자정보통신연구소 2003 電子情報通信硏究所論文誌 Vol.6 No.1

On internet environment multimedia information containing voice and image is tramitted, which is tens times or hundreds times larger than oridnary information Analytic types for network management in this environment are consisted of a real time analysis, a basis analysis and an intensive analysis. An intensive analysis is to gather trend information on specific objects periodically, and to analyze this information in order to monitor network conditions When SNMP is applied to collect the trend information, it brings on an increase of network load, a delay of response time and a decrease of accuracy of data collection since an agent responds to each managers' polling. In this paper, an efficient SNMP is proposed and implemented to add time variables in the existing SNMP PDU It minimizes unnecessary traffic at an intensive analysis between manager and agent, and collects trend information accurately The results of experiments show that it has compatibility with the existing SNMP, decreases an amount of network traffic greatly and increases the accuracy of data collection.

Poly(ρ-phenylenesulfide)와 Poly(ρ-phenylene)으로부터 제조된 탄소의 리튬 이온 2차전지 anode 재료로서의 전기화학적 특성

유덕영,이주성,박수길,변지형,류신환,정윤이 한양대학교 에너지·환경기술연구소 1998 에너지·環境技術論文集 Vol.4 No.-

Poly(p-phenylenesulfide)와 poly(p-phenylene)으로부터 제조된 탄소를 리튬이온 2차전지용 음극재료로 사용하여 전기화학적특성을 연구하였다. 이들 고분자들을 질소 분위기하에서 승온속도 2℃/min로 1000℃까지 상승시킨 후, 1시간 동안 탄화시켜 탄소를 제조하였다. Poly(p-phenylene)으로부터 제조된 탄소가 보다 더 규칙적인 구조를 가지기 때문에 Poly(p-phenylenesulfide)으로부터 제조된 탄소보다 더 많은 용량과 충방전 효율을 나타내었다. 수산화리튬과 염화주석(Ⅱ)을 첨가하여 용량의 증가와 충방전 효율의 증가를 가져올 수 있었다. 이중에서 poly(p-phenylene)에 염화주석(Ⅱ)을 첨가시켜 제조된 탄소가 가장 큰 충방전 용량과 충방전 효율의 향상을 가져왔다. Carbon inaterials manufactured from poly(p-phenylene sulfide) and poly(p-phenylene), were studied on electrochemical characteristics as anode materials for lithium ion secondary battery. These polymer precursors were heat treated for 1hr at 1000℃ with the rate 2℃/min under nitrogen atmosphere. Carbon manufactured from poly(p-phenylene) showed higher capacity and coulomb efficiency of charge/discharge than carbon from poly(p-phenylene sulfide) because the former has better ordered structure. Carbon manufactured from polymer precursors adding stannous chloride or lithium hydroxide showed higher capacity and better efficiency of charge/discharge. Also, carbon manufactured by adding stannous chloride to poly(p-phenylene) showed the highest capacity and efficiency of charge/discharge.

생산방식별 남성정장 소비자의 의복관심도 수준에 따른 위험지각과 의복만족도 : 기성복, 시스템오더, 맞춤복 소비자를 중심으로 Focus on consumers of ready-made suits, system oder suits and custom made suits

주유정,정성지 동덕여자대학교 디자인연구소 2003 디자인포럼21 Vol.6 No.-

본 연구의 목적은 남성들의 의류 중에서 첫째, 정장용 맞춤복, 시스템오더, 기성복에 대한 구매 행동을 의복관심도, 위험지각, 의복만족도 요인을 측정하고 둘째, 의복관심도 수준에 따른 위험지각과 의복 만족도 차이를 알아보고자 한다. 본 연구의 조사방법은 20대-50대 남성을 대상으로 자기기입식 설문지를 사용하여 실시하였다. 수집한 자료는 SPSS Package Program을 사용하여 분석하였으며, 자료분석은 빈도와 백분율, 평균 및 표준편차를 이용하여 분석한 후 요인분석, ANOVA, Duncan's test를 이용하였다. 본 연구의 요약 및 결과는 다음과 같다. 첫째, 의복관심도 요인분석으로는 유행성 차원 요인, 즐거움 차원 요인, 신분상징성 차원 요인으로 분석되었고, 위험지각 요인으로는 사회적 위험 요인, 유행 · 심리적 위험 요인, 의복관리 위험 요인, 편의성 위험 요인, 경제성 위험 요인으로 분석되었으며, 의복만족도 요인으로는 사회적 만족도 요인, 유행 · 심리적 만족 요인, 품질 만족 요인, 경제적 만족 요인으로 구분되었다. 둘째, 의복관심도가 높은 집단이 기성복과 맞춤복 집단에서는 모든 위험지각 요인이 높게 나타났고, 시스템오더 집단에서는 위험지각 요인 중 유행 · 심리적 위험요인, 의복 관리위험 요인과 경제성 위험 요인에서 높게 나타났다. 셋째, 기성복 집단에서는 의복관심도 수준이 높은 집단이 모든 만족도 요인이 높았으며, 시스템 오더 집단과 맞춤복 집단에서는 유행/심리요인에서만 높게 나타났다. The purpose of the study was to investigate differences in risk recognition and clothing satisfaction of consumers of ready-made suits, system oder suits and custom made suits according to the level of their clothing interest. As an instrument for the survey, the questionnaire was developed by the researchers and distributed to male consumers aged from 20 to 50. To analyze the data, factor analysis, ANOVA, and Duncan's test were used. As the result, first, in all consumer groups, there were significant differences in risk recognition and satisfaction according to level of their clothing interests. Second, the ready-made suit consumers and the custom-made suit consumers who had higher clothing interest had higher recognition in all the factors of risk. But the system order suit consumers who had higher clothing interest had higher recognition in fashion and psychological risk, maintenance risk and economical risk. Third, the ready-made suit consumers who had higher clothing interest were satisfied more in all the satisfaction factors. But he system order suit consumers who had higher clothing interest were more satisfied in fashion and psychological factor and social factor, and the custom-made suit consumers who had higher clothing interest were more satisfied only in fashion and psychological factor.

사상체질별 스트레스인지와 대처방법

유정희,이향련,이의주 성인간호학회 2003 성인간호학회지 Vol.15 No.2

This study was founded to identify perception and ways of coping with stress according to classification of Sasangin(4 constitutions). Method: The subjects were 258 regular students who majored in oriental medicine in Jechon and Seoul. Data was collected by 3 types of questionnaires for 3 months: Perceived stress. ways of coping Questionnaires of Sasang Constitution classification9QSCCⅡ). Data analysis was conducted by SPSS vwesion 10. Result: 1) Difference of perceived stress in Sasangin: Perceived stress by the Sasangin indicated that Soenmin perceived more stress that Soyangin and Taeumin(P=.013). 2) Different method in coping with stress of Sasangin: It was found that Soeumin didn’t make use of emotional coping way according to the analysis(P=.040). 3) Relationship between way of coping for stress an perceived stress in Sasangin: It was shown that as Soeumin Perceived stress so higher than Sasangin and Taeumin,they tended to use the solving problem-method therefore I was shown to have a negative correlation(P=.044). Conclusion: In conclusion. it was found that there were difference of Sasangin in perceived stress and ways to cope with it. The dose relationship between the perception and coping method of stress was found.

조혈모세포이식 후 발생한 주폐포자층 폐렴에 대한 고찰

주지현,최정현,이동건,백지연,고윤호,이혜정,김세희,신호진,박윤희,박지영,김유진,신완식,김춘추 대한감염학회 2001 감염 Vol.33 No.4

Background : Pneumocytitis cainii pneumonia (PCP) can occur in immunocompromised hosts especially such as AIDS or cancer patients. Although recent research had focused on PCP in AIDS patients, few studies have described the clinical presentations of PCP in recipients of stem cell transplantation (SCT). We evaluated the clinical manifestations of PCP in SCT patients admitted at St. Mary's hospital, Seoul, Korea. Methods : The medical records of 17 PCP patients undergoing SCT between Feb. 1998 and Feb. 2000 were reviewed. The diagnosis of PCP was confirmed through the demonstration of Pneumocytitis cainii via either cytology of brochoalveolar lavage (BAL) or histological technique of lung biopsy. CMV disease and CMV infection were confirmed by BAL culture and antigenemia respectively . Results : Seventeen patients were all recipients of allogeneic SCT and 7 of 17 patients were performed non-sibling SCT. Patients presented with symptoms including brief period (4 ∼23 days) of fever (76%), dyspnea (70%), cough (64%), and signs such as rare(58.8%), Sixteen patients (94%) had been receiving immunosuppressive agent such as cyclosporine A (64%) or Fk506 (35%) without PCP prophylaxis. Eleven patients (64%) were treated with corticosteroid with mean dose of 16 mg/day prednisolone and mean duration of 4.6 months after post-SCT period. Twelve patients were co-infected with CMV. Another co-infected miCroorganisms were Pseudomonas aeruginosa, Mycobacterium tuberculosis, herpes simplex virus, parainfluenza virus, Average duration of treatment with trimethoprim-sulfamethoxazole (TMP/SMX) was 21 ±9 days. Four patients died, and three of them were related with PCP. Conclusion : PCP developed frequently in patients who were taking immunosuppressive drug due to graft versus host disease or were not taking TMP/SMX prophylaxis. High risk patients showing fever, cough, or dyspnea should be considered to take early bronchoscopic intervention for detection of PCP. When treat for PCP, it also be considered to the possibility of coinfection such as CMV. (Korean J Infect Dis 33:273∼279, 2001)

다중 쓰레드 기반의 병렬처리서버용 안티바이러스 엔진

유주영;김미애;박은옥;박유미;최주영;최은정;김명주 서울여자대학교 컴퓨터과학연구소 2004 정보기술논문지 Vol.2 No.-

악성코드에 대한 보다 바람직한 예방은 클라이언트측이 아닌 서버측에서 이루어지는 것이다. 본 논문에서는 새로운 개념 의 서버용 안티바이러스 엔진인 SAVE 1.0을 설계 구현하여 제시한다. SAVE는 기본적으로 1개의 AV모니터와 다수의 AV에이전트로 구성되어 있는데 다중 CPU를 장착한 병렬처리서버의 특징을 직접 활용하기 위하여 관리자가 다중쓰레드 기법을 직접 지정할 수 있도록 하고 있다 악성코드를 5가지 부류로 구분하여 바이러스 시그너쳐 DB를 구축 제공함으로써 부류별 진단을 지정할 수 있도록 하고 있으며 실시간 네트워크 패킷 검사를 통한 악성코드 유입 점검 기능도 제공한다. 웹 기반의 관리자 인터페이스는 뛰어난 사용자 편의성을 제공하고 있다. 성능실험결과 악성코드 검색율은 국내외 상용제품과 비교해서 매우 우수한 것으로 나타났으며 검색속도에 있어서도 서버의 CPU 수 증가에 거의 선형 비례하여 향상되는 특징을 보이고 있다. It is more desirable to prevent and detect the malicious codes in server system rather than in client PCs. In this paper, we suggest a new anti-virus engine, SAVE 1.0, which is executed on a parallel processing server. SAVE consists of 1 AV monitor and several AV agents. A system administrator can control the degree of multi-thread directly in order to enhance the utilization of parallel processing servers. Virus signature DBs in SAVE are classified into 5 categories, which support system administrator's options to use the classifier or not. By real-time checking of network packets, the influx of malicious codes can be prevented. Web-based GUI is one of the convenient functions provided in SAVE. In performance tests, we have confirmed that SAVE has higher virus detection ratio than any other AV engine, and SAVE has a desirable feature as an software of parallel processing servers since the performance of SAVE is improved almost linearly as the CPUs in a parallel processing server increases.

CWOS와 황토를 이용한 농축·소화슬러지의 탈수성에 관한 연구

정병길,고현웅,주윤경,정유진,이징연 동아대학교 환경문제연구소 2002 硏究報告 Vol.25 No.1

Every year, 190,000 tons of oystershell are wasted from many oyster farms. And the fact that the main components of oystershell are CaO and Al₂O₃ which are chemically similar to those of lime leaded to an assumption that oystershell can be used as raw materials for synthesizing dewatering conditioner. In this study, the Jar-Test and the Bu˝chner funnel test were proceeded for the assessment of dewaterability of a thickened sludge and digested sludge. And TTF(Time To Filter), SRF(Specific Resistence Filtration) and TS(Total Solids) were adopted as the valuation indices of sludge dewaterability. Dewatering conditioner which composed of both oystershell and loess is much dewaterable than the one composed of only oystershell. And in the course of combining of oystershell and loess, the following fact was found that the dewaterability of the combination which have the higher ratio of oystershelI than that of loess is superior. Eventually, the most suitable ratio of dewatering conditioner complex is 9 : 1 (oystershell : loess) in treating not only thickened sludge but also digested sludge. In conclusion, the conditioner synthesized from waste oystershell and loess seems to be used as a splendid alternative material for the dewatering conditioner treating the sludge of sewage.

전분 충전 아크릴레이트 필름의 α-Amylase에 의한 생분해

김정두,유수용,감상규,주창식,이민규 한국환경과학회 2004 한국환경과학회지 Vol.13 No.9

The biodegradability of vinyl acetate acrylate resin and corn starch blend was studied by determination of the reduced sugars produced after enzymatic hydrolysis. The starch hydrolysis reaction by a-amylase was achieved within 5 minutes. Optimal ranges of temperature and pH for the starch hydrolysis by a-amylase were around 80 ℃ and 6.5-7.2, respectively. The biodegradability of the starch-filled acrylate films increased as the content of starch increased. The biodegradation of starch in the starch-filled acrylate film by a-amylase was about 48.6% of that of pure starch. This value of biodegradable starch-filled acrylate film gave a good result with enzymatic shortcut test. The surface morphologies of the starch-filled acrylate film after enzymatic hydrolysis were investigated by scanning electron microscopy (SEM).

합성 Goethite에 의한 인산이온, 황산이온 및 구리이온의 흡착 특성

김정두,유수용,문명준,감상규,주창식,이민규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9

Adsorption of phosphate, sulfate, and copper ion to goethite was investigated. Goethite was prepared in the alkaline solution. In the single adsorbate systems, the final equilibrium plateau reached within 20 min. The adsorption isotherms of the individual ions could be well described by the Langmuir equation. The maximum adsorption capacities (q_(max)) were calculated as 0.483 mmol/g and 0.239 mmol/g at pH 3 for phosphate and sulfate ion, and 0.117 mmol/g at pH 6 for copper ion, respectively. In competitive adsorption system with phosphate and sulfate, phosphate ion was a stronger competitor for adsorption on goethite than sulfate ion, which was consistent with higher affinity of phosphate ion for the surface compared to sulfate ion. The existence of sulfate ion enhanced the adsorption of copper ion but the adsorption of sulfate was inhibited when copper ion was present.