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김완주(Wan Joo Kim),김재태(Jae Tae Kim) 한국부동산융복합학회 2021 부동산융복합연구 Vol.1 No.1
본 연구의 목적은 홍대상권을 중심으로 문화가치와 공간성이 내재된 소비자들의 인식변화 및 만족도를 분석한 1차 연구자료를 토대로 문화공간의 성향을 가지고 있는 빌딩을 중심으로개발되고 있는 사례를 분석하였다. 본 연구의 분석방법은 SPSS 23.0과 AMOS 22.0 프로그램을 이용한 기초통계자료와 구조방정식 모형분석을 근거로 분석하였다. 실증분석을 위한 데이터는 서울시 홍대상권 지역을 방문하는 10대에서 50~60대까지 남녀를 모집단으로 설정하고, 2019년 7월, 1:1면대면 설문조사를 통한 166부를 유효표본으로 선정, 분석하였다. 결론은 다음과 같다. 첫째, 홍대 주변지역은 10∼30대의 문화적 감성과 유희적인 공간의 수요가많은 먹거리, 볼거리, 놀거리, 쉼 공간 등의 영역 공간이 더욱 더 활성화되고 있다. 둘째, 현대적인 공간에서 상업공간, 패션공간, 엔터공간, 휴식공간들이 만족도가 높아지고 있다. 결론적으로 홍대 지역문화의 정체성과 분위기에 맞는 문화공간 특성을 지향하는 빌딩의 부동산가치가 상승하고 있는 것을 알 수 있다. The purpose of this study was to analyze cases developed around buildings with cultural space tendency based on the first research data that analyzed changes in perception and satisfaction of consumers with inherent cultural value and spatiality. The analysis methods of this study are as follows. Basic statistical analysis and structure equation analysis were performed using the program fo SPSS 22.0 and AMOS 220. In July 2019, 166 parts were selected as the final valid sample and analyzed by conducting a face-to-face survey of male and female populations in their teens and over 50~60s who visited aroud Hongdae. The results of the following studies have been derived: First, areas around Hongdae are becoming more active in areas such as food, attractions, entertainment, and shelter, where cultural sensibility and entertainment spaces in their 10s and 30s are in high demand. Second, in modern spaces, commercial spaces, fashion spaces, entertainment spaces, and relaxation spaces are becoming more satisfying satisfaction. In conclusion, it can be seen that the real estate value of buildings aiming for cultural space characteristics that fit the identity and atmosphere of Hongdae's local culture is increasing.
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나성범,김완주,지웅길,La, Sung-Bum,Kim, Wan-Joo,Jee, Ung-Kil 대한약학회 1994 약학회지 Vol.38 No.2
${\beta}-Lactamase$ stability, chemotherapeutic activity, and pharmacokinetics of 7-[(Z)-2-(2-aminothiazole-4-yl)-2-methoxyiminoacetamido]-3-[4-(2-pyridyl)piperazinyl]thiocarbonylthiomethyl-3-cephem-4-carboxylic acid(CEN1), 7-[(Z)-2-(2-aminothiazole-4-yl)-2-methoxyiminoacetamido]-3-[4-(2-pyrimidyl)piperazinyl]thiocarbonylthiomethyl-3-cephem-4-carboxylic acid(CEN2), pivaloyloxymethyl-7-[(Z)-2-(2-aminothizaole-4-yl)-2-methoxyiminoacetamido]-3-[4-(2-pyridyl)piperazinyl]thiocarbonyl-thiomethyl-3-cephem-4-carboxylate(CEN1P), and pivaloyloxymethyl-7-{(Z)--2-(2-aminothizaole-4-yl)-2-methoxyiminoacetamido]-3-[4-(2-pyridyl)piperazinyl]thiocarbonyl-thiomethyl-3-cephem-4-carboxylate(CEN2P) were examined. CEN1, CEN2, CEN1P, and CEN2P were very stable to the ${\beta}-lactamase$ obtained from three strains(Enterobacter cloacae P99, Escherichia coli TEM, and Citrobacter freundii). Chemotherapeutic activities$(ED_{50})$ of CEN2 and CEN2P against experimental systemic infections due to Streptococcus pyogenes 77A and Escherichia coli 078 were superior to those of CEN1 and CEN1P, respectively. The $ED_{50}$ values of CEN1, CEN2 were 5.82 mg/kg, 0.89 mg/kg(s.c., S. pyogenes 77A) while those of CEN1P, CEN2P were 14.56mg/kg, 6.40mg/kg(p.o., S. pyogenes 77A), respectively. The pharmacokinetics of CEN1, CEN2, CEN1P, and CEN2P were investigated in mice and rats. In mice, peak blood levels of $1.25\;{\mu}g/ml$ were recorded within 20 min after oral administration of a single dose equivalent to 40 mg/kg CEN1P. Cmax of CEN1P was much higher than that of CEN1 in mice and rats. Oral absorption of CEN2P was much higher than that of CEN2.
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새로운 경구용 세팔로스포린류의 물리화학적 성질 및 분해특성
나성범,김완주,지웅길,La, Sung-Bum,Kim, Wan-Joo,Jee, Ung-Kil 대한약학회 1994 약학회지 Vol.38 No.2
Physicochemical properties and hydrolysis kinetics of new some oral cephalosporins were examined in buttered solution and human plasma or rat liver homogenate. The test cephalosporins were 7-[(Z)-2-(2-aminothiazole-4-yl)-2- methoxyiminoacetamido]-3-[4-(2-pyridyl)piperazinyl] thiocarbonylthhiomethyl-3-cephem-4-carboxylic acid (CEN1), 7-[(Z)-2-(2-aminoth iazole-4-yl)-2-methoxyiminoacetamido]-3-[4-(2-pyrimidyl)piperazinyl]th iocarbonylthiomethyl-3-cephem-4-carboxylic acid (CEN2), pivaloyloxymethyl-7-[ (Z)-2-(2-aminothiazole-4-yl)-2-methoxyiminoacetamido]-3-[4-(2-pyridyl)piperazi nyl]thiocarbonylthiomethy1-3-cephem-4-carboxylate (CEN1P), and pivaloyloxymethyl-7-[(Z)-2-(2-aminothiazole-4-yl)-2-methoxyiminoacetamido]-3-[ 4-(2-pyrimidyl)piperazinyl]thiocarbonyl-thiomethyl-3-cephem-4-carboxylate (CEN2P). The partition coefficient(Ko/w) of CEN1P, CEN2P were higher than those of CEN1, CEN2. The calculated pKa values of CEN1, CEN2, CEN1P, and CEN2P were 7.09, 7.75, 4.92, and 5.39, respectively. The hydrolysis of CEN1P and CEN2P were not depend on the composition of pH of the test medium except weak alkaline buffered solution (pH 8.00). CEN1 and CEN2 were very stable in pH 6.80 and 8.00 buffer solutions. CEN1P and CEN2P were rapidly deesterified to CEN1 and CEN2 in human plasma and in rat liver homogenate. Half-lives$(t_{1/2})$ of CEN1 and CEN2 were 3.49 and 4.93 hr in human plasma, 1.47 and 1.26 hr in rat liver homogenate, respectively.
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시뮬레이션 기반 육군전술지휘정보체계에 대한 웜 피해평가
김기환,김완주,이수진,Kim, Gi-Hwan,Kim, Wan-Joo,Lee, Soo-Jin 한국국방경영분석학회 2007 한국국방경영분석학회지 Vol.33 No.2
육군은 실시간으로 지휘통제 정보를 공유하는 전장정보체계의 구성을 위해 육군전술지휘정보체계(ATCIS : Army Tactical Command Information System)를 개발하였다. 이러한 ATCIS 체계는 공개키 및 암호화 장비를 이용하여 무결성, 비밀성은 충분히 충족시키지만, zero day attack을 이용한 새로운 방법의 DDoS(Distributed Denial of service)공격 등 가용성에 대해서는 무결성, 비밀성만큼의 안전성이 확보되지 못한 실정이다. 따라서 본 논문에서는 네트워크 시뮬레이터인 NS-2(3)에서 제공하는 DN-AN 모델을 이용하여 웜 피해평가를 위한 시뮬레이션을 구현하였다. 또한, 도출된 결과를 통해 ATCIS에서의 웜 취약점을 분석하고, 대응방안을 제안한다. The army developed the ATCIS(Army Tactical Command Information System) for the battlefield information system with share the command control information through the realtime. The using the public key and the encryption equipment in the ATCIS is enough to the confidentiality, integrity. but, it is vulnerable about the availability with the zero day attack. In this paper, we implement the worm propagation simulation on the ATCIS infrastructure through the modelling on the ATCIS operation environment. We propose the countermeasures based on the results from the simulation.
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단일 안테나를 사용하는 W-대역 호모다인 FMCW 레이더의 누설신호에 의한 IF 잡음에 관한 연구
박정동,김완주,Park Jung-Dong,Kim Wan-Joo 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.7
본 논문은 단일 안테나를 사용한 호모다인 방식의 W-대역 주파수 변조 연속파형 (FMCW) 레이더 송수신장치의 송수신단간의 신호 결합에 의해서 발생하는 누설에 의한 IF 잡음의 특성을 분석하여 이를 효과적으로 제거할 수 있는 방안을 제시한다. 송수신장치에서 발생하는 누설은 LO 신호의 지연시간을 안테나 입력단의 부정합으로 인해서 발생하는 반사전력의 지연시간과 일치시켜 그 크기를 줄일 수 있다. 또한, 중간주퐈수(IF) 잡음은 주기적인 특이점을 가진 신호로써 VCO의 삼각파변조신호와 매우 유사한 스펙트럼 형태를 가짐을 확인하였다. 분석된 결과를 바탕으로 W-대역 호모다인 FMCW레이더 센서를 구현 하였으며, 표적감지 및 비트신호 검출 시험을 성공적으로 수행하였다. 본 분석 결과는 단일 안테나를 사용하는 호모다인 FMCW 레이더의 설계에 유용하게 적용될 것이다. In this paper, we describe a solution to improve the effects of the transmitter leakage signals on the frequency modulated continuous wave (FMCW) radar with a single antenna configuration. We analyze characteristics of the IF noise caused by insufficient isolation between transmitter and receiver. The magnitude of the intermediate frequency (IF) noise from a front-end can be reduced by matching the LO signal delay time with that of the largest leakage source. Because the IF noise has periodic singularities at nT$_{m}$/2, t=0,1,2$\cdots$, we find that spectrum of the IF noise due to the leakage signals is very similar to that of the VCO moduation signal except low frequency elements in the vicinity of DC. Based on the studies, we fabricated a W-band homodyne FMCW radar sensor and verified the proposed solution. The results are applicable to design of the homodyne FMCW radar with a single antenna configuration.
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