• 지능정보연구
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• 제12권1호
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• pp.43-55
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• 2006

사이버 교육 분야는 인터넷의 발전에 의해서 많은 변화를 하였다. 대학 진학을 위한 분야가 하나이다. 대학 입시 업무 흐름에 있어서 수험생들은 학교에 직접 방문하여 접수하는 방식과 각 지역 접수창구와 팩스를 이용하여 접수를 한다. 최근에는 이를 유기적으로 통합 관리할 수 있는 인터넷 접수 방식이 각광을 받고 있다. 본 논문의 다중 진학 상담 에이전트 시스템은 대학과 학과를 선택하는 과정에서 적합한 학과를 추천하여 주는 인터넷 원서 접수 시스템을 설계하고 구현하였다.

• Macromolecular Research
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• 제12권5호
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• pp.478-483
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• 2004

Two different diene monomers [dicyclopentadiene (DCPD) and 5-ethylidene-2-norbornene (ENB)] as self-healing agents for polymeric composites were microencapsuled by in situ polymerization of urea and formaldehyde. We obtained plots of the storage modulus (G') and tan $\delta$ as a function of cure time by using dynamic mechanical analysis to investigate the cure behavior of the unreacted self-healing agent mixture in the presence of a catalyst. Glass transition temperatures (T$\_$g/) and exothermic reactions of samples cured for 5 and 120 min in the presence of different amounts of the catalyst were analyzed by differential scanning calorimetry. Of the two dienes, ENB may have advantages as a self-healing agent because, when cured under same conditions as DCPD, it reacts much faster in the presence of a much lower amount of catalyst, has no melting point, and produces a resin that has a higher value of T$\_$g/. Microcapsules containing the healing agent were successfully formed from both of the diene monomers and were characterized by thermogravimetric analysis. Optical microscopy and a particle size analyzer were employed to observe the morphology and size distribution, respectively, of the microcapsules. The microcapsules exhibited similar thermal properties as well as particle shapes and sizes.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2003년도 춘계학술대회논문집
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• pp.91-100
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• 2003

In this paper we investigate the role that warfare played In the formation of the network of alliances between sites that are associated with the formation of the state in the Valley of Oaxaca, Mexico. A model of state formation proposed by Marcos and Flannery (1996) is used as the basis for an agent-based simulation model. Agents reside in sites and their actions are constrained by knowledge extracted from the Oaxaca Surface Archaeological Survey (Kowalewski 1989). The simulation is run with two different sets of constraint rules for the agents. The first set is based upon the raw data collected in the surface survey. This represents a total of 79 sites and constitutes a minimal level of warfare (raiding) in the Valley. The other site represents the generalization of these constraints to sites with similar locational characteristics. This set corresponds to 987 sites and represents a much more active role for warfare in the Valley. The rules were produced by a data mining technique, Decision Trees, guided by Genetic Algorithms. Simulations were run using the two different rule sets and compared with each other and the archaeological data for the Valley. The results strongly suggest that warfare was a necessary process in the aggregations of resources needed to support the emergence of the state in the Valley.

• Journal of Preventive Medicine and Public Health
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• 제46권5호
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• pp.213-225
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• 2013

Objectives: The aim of this study was to evaluate the association between Agent Orange exposure and self-reported diseases in Korean Vietnam veterans. Methods: A postal survey of 114 562 Vietnam veterans was conducted. The perceived exposure to Agent Orange was assessed by a 6-item questionnaire. Two proximity-based Agent Orange exposure indices were constructed using division/brigade-level and battalion/ company-level unit information. Adjusted odds ratios (ORs) for age and other confounders were calculated using a logistic regression model. Results: The prevalence of all self-reported diseases showed monotonically increasing trends as the levels of perceived self-reported exposure increased. The ORs for colon cancer (OR, 1.13), leukemia (OR, 1.56), hypertension (OR, 1.03), peripheral vasculopathy (OR, 1.07), enterocolitis (OR, 1.07), peripheral neuropathy (OR, 1.07), multiple nerve palsy (OR, 1.14), multiple sclerosis (OR, 1.24), skin diseases (OR, 1.05), psychotic diseases (OR, 1.07) and lipidemia (OR, 1.05) were significantly elevated for the high exposure group in the division/brigade-level proximity-based exposure analysis, compared to the low exposure group. The ORs for cerebral infarction (OR, 1.08), chronic bronchitis (OR, 1.05), multiple nerve palsy (OR, 1.07), multiple sclerosis (OR, 1.16), skin diseases (OR, 1.05), and lipidemia (OR, 1.05) were significantly elevated for the high exposure group in the battalion/company-level analysis. Conclusions: Korean Vietnam veterans with high exposure to Agent Orange experienced a higher prevalence of several self-reported chronic diseases compared to those with low exposure by proximity-based exposure assessment. The strong positive associations between perceived self-reported exposure and all self-reported diseases should be evaluated with discretion because the likelihood of reporting diseases was directly related to the perceived intensity of Agent Orange exposure.

• 한국통신학회논문지
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• 제29권1C호
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• pp.25-34
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• 2004

이동 에이전트 환경에서는 에이전트의 이동성으로 인하여 플레이스간에 연속된 위임(cascaded delegation)이 빈번하게 발생한다. 이동 에이전트 환경에서의 연속된 위임은 에이전트가 셋 이상의 플레이스를 이주하면서 플레이스간에 권한을 위임하는 과정으로서 정의된다. 이동 에이전트 환경에서 위임에 대한 대표적인 연구로는 Berkovits의 연구가 있다. 이 연구에서는 에이전트의 안전한 이주를 위하여 에이전트를 실행하고 있는 플레이스와 에이전트가 이주하게 될 플레이스간에 주고받아야 할 메시지만을 정의하고 있다. 그러나 이 연구는 에이전트의 이주와 관련된 두 플레이스만을 위임의 대상으로 고려하기 때문에, 셋 이상의 플레이스를 대상으로 하는 연속된 위임을 위한 연구로는 부적절하다. 즉, 연속된 위임을 안전하게 수행하기 위해서는 연속된 위임에 참여하는 모든 플레이스들이 주고받는 메시지간의 관계 형성이 필수적이나, 이러한 관계 형성 과정이 존재하지 않는다. 본 논문에서는 이동에이전트 환경에서 연속된 위임을 안전하게 수행하는 위임 기법을 제안한다. 제안 기법은 각 위임토큰(delegation token)을 다음에 생성되는 위임토큰에 내포시킨 후 서명하는 방법을 사용한다. 또한, 제안 기법이 재연(replay)에 의한 공격 및 위임토큰의 치환에 의한 공격으로부터 안전함을 증명한다.

• 정보처리학회논문지B
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• 제8B권6호
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• pp.609-616
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• 2001

오늘날 인터넷이 보편화되면서 정보 검색 및 뉴스 검색들이 일반화되고 있지만 엄청난 정보의 양과 다양성 등으로 인해 사용자들은 오히려 정보 검색의 어려움을 호소하고 있다. 이에 본 논문에서는 사용자 편의의 뉴스 검색과 사용자의 요구와 취향이 반영될 수 있도록 BPN(Back Propagation Neural Network)의 학습 기능을 가진 지능형 에이전트를 이용하여 뉴스 기사를 필터링하는 뉴스 검색 시스템을 제안한다. 이 시스템은 여러 신문사의 기사를 수집 및 통합하여 그 날의 주요 기사들을 데이터베이스에 저장하는 수집 에이전트, 사용자가 입력한 키워드를 이용하여 BPN 기법으로 학습시키는 학습 에이전트 등으로 구성되어 있다. 또한 정보 통신 기술의 눈부신 발달로 무선 인터넷이 급속히 보급되는 현실을 감안하여 무선으로도 이러한 서비스를 제공할 수 있도록 시스템을 구성하였다.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2008년도 제39차 학술발표회
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• pp.47-48
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• 2008

New scouring agent which was stable up to 50% NaOH 350g/l has been developed for simultaneous CPB/silket treatment of N/C union fabric. The physical and dyeing properties of N/C union fabric treated with new scouring agent were measured. Fabric scoured and Mercerized by one bath CPB/silket process showed almost the same degree of Mercerization and K/S value with two bath process.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제10권1호
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• pp.1-10
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• 2007

Outcome of liver transplantation for children with end liver disease has been improved markedly during last two decades. Improvement of immunosuppressive agent and its strategy to use in children, development of innovative surgical technique, and better understanding of the course of liver transplantation attributed to better outcome of pediatric liver transplantation. Therefore this review article will focus on the problems which can occur during pre- and post-transplantation period, current strategy to use immunosuppressive agent for the better understanding of pediatrician who is not involved in transplantation but takes care of the children pre- and postoperatively.

• Bulletin of the Korean Chemical Society
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• 제28권8호
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• pp.1419-1421
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• 2007

• 약학회지
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• 제37권6호
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• pp.591-597
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• 1993

Two new 6-azauracil dioxolane nucleosides which are related to Dioxolane T and expected to have anti-HIV activity were asymmetrically synthesized. The key intermediate 8 have been synthesized in ten steps from D-mannose and condensed with 6-azauracil to give 13 and 14 after desilylation, respectively.