고온 소성용 TiO2-SiO2계 광촉매의 제조 및 특성

이명진,윤기현,전애경,이지영 한국세라믹학회 2004 한국세라믹학회지 Vol.41 No.6

TiO2, SiO2, and PBA(pseudo boehemite alumina) sol were prepared by sol-gel process. The particle sizes of these sol exhibited uniform 10~30 nm. As the amount of SiO2 sol increased, the temperature of phase transition (from anatase phase to rutile phase) was raised temperature than 600 oC, which attributed to the enhanced photocatalyst properties. Also, the anatase phase was obtained with very small amount of the rutile phase from the addition of SiO2 (10 - 30 wt.%) at annealing temperature of 1200 oC. The specimen with 20 wt. % SiO2 sol exhibited the maximum photocatalyst properties. But, the specimen with PBA sol did not affect photocatalytic activity due to the presence of rutile phase. 졸겔 공정으로 안정한 TiO2, SiO2, PBA(pseudo boehemite alumina) 졸을 제조하였다. 제조한 졸 용액은 비교적 균일한 10~30 nm의 입자크기를 나타내었다. TiO2 졸에 SiO2 졸의 첨가량이 증가함에 따라, anatase 상에서 rutile 상으로 전이되는 상전이 온도를 600 oC 이상으로 증가시켜 광분해 특성을 향상시켰다. 또한, TiO2 졸 용액에 SiO2 졸을 10~30 wt.% 첨가하여 1200 ℃ 이상의 고온 소성 후에도 anatase 가 주된 상으로 소량의 rutile 상이 관찰되었다. 또한 SiO2 20 wt.% 첨가시, 최대의 광분해 특성을 나타내었다. 그러나, PBA 졸의 첨가는 첨가량에 관계없이 광분해 특성에 영향을 주지 않았다.

협동적인 분산 환경에서 BDI 에이전트를 위한 협상 기법

이명진,김진상 한국지능시스템학회 2003 한국지능시스템학회논문지 Vol.11 No.3

Agents in multi-agent systems (MAS) are required to achieve their own goals. An agent's goal, however, can conflict with others either when agents compete with each other to achieve a common goal or when they have to use a set of limited resources to accomplish agents' divergent goals. In either case, agents need to be designed to reach a mutual acceptable state where they can avoid any goal conflicts through negotiation with others to achieve their goals. In this paper, we consider a BDI agent architecture where belief, desire, and intention are the three major components for agents' mental attitudes and represent resource-bounded BDI agents in logic programming framework. We propose a negotiation algorithm for BDI agents solving their problems without goal conflicts in distributed cooperative environments. Finally, we describe a simple scenario to show the effectiveness of the negotiation algorithm implemented in a negotiation meta-language. 멀티에이전트 시스템에서 에이전트는 각자 달성해야 할 목표를 가지고 있다. 그러나 여러 에이전트들이 하나의 공통된 목표를 달성하기 위해 서로 경쟁을 하는 경우거나 혹은 각자의 서로 다른 목표를 달성하기 위해 제한된 자원을 사용해야 하는 경우 에이전트들은 서로 충돌할 수 있다. 충돌이 발생할 때 에이전트들은 각자의 목표를 달성하기 위해 다른 에이전트들과의 협상을 통해 목표의 충돌이 없는 일치 상황에 도달하도록 설계되어야 한다. 본 논문은 멀티에이전트 시스템에서 믿음(belief), 소망(desire), 그리고 의도(intention)로 설명되는 BDI 구조가 각 에이전트가 가져야 할 정신적 태도의 핵심 요소라고 가정하고, 이러한 구조를 가지는 BDI 에이전트를 논리 프로그래밍의 틀에서 표현한다. 또한 서로 다른 목표를 가진 BDI 에이전트들이 자원이 제한된 협동적인 분산 환경에서 상호간의 목표 충돌을 해결하기 위해 협상을 통해 각자의 문제를 해결하는 알고리즘을 제시한다. 마지막으로 본 논문에서 제안한 협상 알고리즘의 효과성을 검증하기 위하여 협상 메타 언어로 구현한 예제 문제의 실험 결과를 기술한다.

사회조사에서 경제적 변수로써 아파트 시세의 적용 가능성

이명진 한국조사연구학회 2006 추계학술대회 발표논문집 Vol.2006 No.-

Coverage Dependent Adsorption and Electronic Structure of Threonine on Ge (100) Surface

이명진,김기정,이한길 한국진공학회 2012 한국진공학회 학술발표회초록집 Vol.2012 No.8

TPB모형을 활용한 보험사기의 행동의도에 관한 연구

이명진 한국정보기술응용학회 2006 한국정보기술응용학회학술대회 Vol.2006 No.1

The Adsorption of the 3-methyl 5-pyrazolone on the Ge(100) Surface

이명진,이한길 한국진공학회 2014 한국진공학회 학술발표회초록집 Vol.2014 No.2

전산보안시스템 구축체계에서 수집한 디지털증거의 원본성 증명에 관한 연구

이명진,이병엽 한국콘텐츠학회 2023 한국콘텐츠학회논문지 Vol.23 No.8

전산보안시스템은 디지털 장치의 매우 중요한 시스템 중 하나이다. 전산시스템에 저장된 많은 디지털 자료들이 부당하고 위법하게 사용되는 것을 방지하는 중요한 시스템이라 할 것이다. 이에 기업들은 전산보안시스템 구축에 많은 비용과 노력을 기울이고 있다. 전산보안시스템은 기업의 특성에 맞게 발전되었고 기업들이 내부적으로 규정한 절차대로 기업에서 생산하는 디지털 자료가 여러 보안시스템을 거치게 되었다. 하지만 디지털 포렌식 조사에서는 기업의 전산시스템의 발전이 디지털증거의 수집이나 분석하는 것에 어려움이 될 수 있다. 현재 선별이라는 방법으로 디지털증거를 수집하고 있으나 선별수집에 앞서 전산보안시스템의 구축은 디지털증거의 원본의 기준이 모호해지는 문제가 발생한다. 이에 본 논문에서는 기업의 전산보안시스템의 구축체계에서 디지털증거의 기본원칙인 원본의 수집에 있어 원본의 기준을 실무적으로 명확히 하는 디지털증거의 수집 방안을 제시해 보고자 한다.

Epidemiological Aspects of Zika Virus Infection Cases among Overseas Travelers in Korea and Japan

이명진,이원창,Kwon Young Hwan 한국항공우주의학협회 2022 항공우주의학회지 Vol.32 No.3

Purpose: Zika virus (ZIKV) infection is a mosquito-borne Flavivirus disease. we investigated the epidemiological aspects and status of imported ZIKV infection cases in Korea (Republic of) and Japan during 2016–2020. Methods: Raw data of ZIKV infection cases from the Korea Diseases Control and Prevention Agency, and the National Institute of infectious Diseases in Japan, 2016– 2020. Results: There were 33 cases of ZIKV infection in Korea and 21 cases in Japan between 2016 and 2020. Cumulative incidence rate per 1,000,000 overseas travelers (OTs) of Korea (0.30) did not substantially differ that of Japan (0.27), respectively. We observed the ZIKV infected cases of male (69.7% of total cases) were much more than that for female (30.3%) in OTs of Korea (P<0.05). However, while there was none significant differences level between males (52.4%) and females (47.6%) in OTs of Japan. On the other hands, the distribution by adjusted-age groups for ZIKV infections were similar between Korean and Japanese that total cases occurred in the over 20 to 59-years old age, clearly more showing a higher infected of ZIKV (P<0.01). The presumptive origin imported ZIKV infection cases in Korean were as follows; Southeast Asia (81.8% of total cases) and Central & South Americas (18.2%), and those in Japan, these were Southeast Asia (42.9%) and Central & South Americas (42.9%) and Oceania (4.7%), respectively. Conclusion: This study demonstrates that there is a similar pattern of imported ZIKV disease cases in Korea and Japan. Therefore, to prevent ZIKV infections, greater attention should be paid to individuals who are planning to travel to the presumptive regions of ZIKV.

Temporal Variation in the Strength of Educational Assortative Marriage in Korea: A Birth Cohort Analysis of the 2000 Korea Census

이명진 서울대학교 사회발전연구소 2010 Journal of Asian Sociology Vol.39 No.1

This paper investigates the trend in assortative marriage with respect to education among a large Korean cohort born in the 1930s to the 1970s. The two-percent sample data from the 2000 Korea Census is used to investigate changes in the association between couples’ educational attainment across different time periods. The primary assumption of this study is that status distance inhibits social association such as friendship and marriage. With increasing difference in status between individuals, the rate of social association among individuals is negatively correlated to status difference. Being one of the most important associations, this would suggest that marriage becomes less frequent with increasing status distance between potential spouses, thus producing assortative marriage with respect to social status. Various types of log-linear models and L2 (likelihood ratio chi-square)-distance measures are used to analyze the temporal change of educational assortative marriage in this paper, and the main findings are as follows. First, with Korea’s rapid economic growth since the 1960s, earlier birth cohorts show an increase in educational assortative marriage. Korea’s unique historical experiences appear to heighten the importance of achieved status, such as educational attainment, as a new basis for social hierarchy. Second, educational assortative marriage decreases among later birth cohorts. However, this decrease does not necessarily tend to increase general social openness because new types of status base, such as family background, emerge and gain increased importance in marriage selection in line with increased stability of social stratification.

다양한 진주조개 패각의 색상 및 광학적 특성 분석

이명진,채원식,서진교,박종완 한국패류학회 2009 The Korean Journal of Malacology Vol.25 No.3

Optical properties and color analysis of nacreous layers were performed using various pearl shells. The cross section and microstructure of the surface in each nacreous layers were observed through a SEM (Scanning Electron Microscope), and the diffraction pattern on SEM images was analyzed using FFT (Fast Fourier Transform). Through these analysises, it was verified that the color and optical characteristics are closely related to the structure of nacreous layers. Incident angle-dependent reflection spectrum was used to examine the phenomena of color differenceas the direction of observation. Quantified values on the color change were obtained by CIE L*a*b* color scale. Using this research, database for the characteristics of natural pearl shells can be established, and the precise analytic method for observation of pearl shells was suggested.