• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 ITC-CSCC -2
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• pp.727-730
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• 2000

Recently, RoboCup soccer simulation has been regarded as a good benchmark problem for multiagent researches. Soccer agents have to make decision based on visual and auditory information, which are sent from the soccer server. In order to develop a strong team, we have to design decision-making process of each player agent. However, it is very difficult for us to design the decision-making processes in detail, because we don't know what actions of each player are effective for the team. In this paper, we attempt to apply co-evolutionary method, which is one type of analogies of evolution, to improve the team play. Agents have hand coded basic skills, which include dribble, shoot, pass etc. Agents already can play autonomously and independently. Individual agent skills are characterized by some parameters. By coevolving teams with these parameters, we obtained relatively interesting teams, in which players behave cooperatively in order to win the soccer game. From some experiments, we discuss what teams are evolved.

• 한국유전체학회:학술대회논문집
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• 한국유전체학회 2006년도 The 15th Korean Genome Organization Conference KOGO 2006 Annual Meeting
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• pp.28-28
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• 2006

• 한국자기공명학회논문지
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• 제23권1호
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• pp.12-19
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• 2019

A former study has shown that the spin-lattice relaxation time ($T_1$) in cancerous prostate tissue had enhanced contrast at an ultra-low magnetic field, $132{\mu}T$. To study the field dependence and the origin of the contrast we measured $T_1$ in pairs of ex-vivo prostate tissues at the Earth's magnetic field. A portable and coil-based nuclear magnetic resonance (NMR) system was adopted for $T_1$ measurements at $40{\mu}T$. The $T_1$ contrast, ${\delta}=1-T_1$ (more cancer)/$T_1$(less cancer), was calculated from each pair. Additionally, we performed pathological examinations such as Gleason's score, cell proliferation index, and micro-vessel density (MVD), to quantify correlations between the pathological parameters and $T_1$ of the cancerous prostate tissues.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2004년도 하계학술발표 논문집
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• pp.97-97
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• 2004

• 한국자동차공학회논문집
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• 제23권4호
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• pp.396-401
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• 2015

A door checker holds a car door at several opening angles and limits the maximum door opening, so that the door does not bump against to passengers. Recently, the performance of door checker becomes more important as the feeling of door opening and closing effects on the quality of a car. However, some of door checkers make squealing noise when they are used for ages, which causes consumer's complaints as well as decreasing commercial value of the product. In this study, after various experiments for the noise, we concluded that the major reasons of the noise are acceleration of wearing and loss of lubricant due to impurities in working parts. Therefore, we developed a new mechanism of door checker which can resolve the major reasons of the noise. The developed mechanism is effective to prevent inflow of impurities and loss of lubricant by locating working parts in the case. We also proved that the developed mechanism does not make any noise after the test of 50,000 times of operations.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.920-925
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• 2008

In this presentation, a leaching experiment which is followed the pH changes(pH=4, pH=7) and the mixing rates(1%, 3%, 5%, 7%) was carried out to examine the arsenic reduction effects and the leaching characteristics on arsenic contaminated soil after stabilization treatment in which 5 materials were used as stabilization agencies, i.e. ZVI(zero valent iron), blast furnace slag, steel refining slag, quick lime, and oyster shell meal. Except for blast furnace slag, the arsenic removal rate increased as the mixing rate increases of stabilization agencies. Arsenic leaching concentration was indicated that pH=7 condition is higher than pH=4 condition. This result shows because arsenic immobilization reaction increases as pH decreases, and arsenic adsorption takes place as pH decreases.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1688-1691
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• 2007

This paper shows that the boundary image sticking can be prohibited completely by using the vacuum sealing process, which means that the residual impurities such as nitrogen or oxygen can be a critical factor inducing the boundary image sticking. The production of boundary image sticking was checked in the test panel fabricated by the $N_2$ or $O_2$ flow during the vacuum sealing process. As a result, the boundary image sticking did not appear in the case of $N_2flow$, whereas the boundary image sticking was observed in the case of $O_2$ flow even though the test panel was fabricated by the vacuum sealing process.

• Journal of Information Processing Systems
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• 제11권1호
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• pp.125-133
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• 2015

The Remote Device Management (RDM) protocol is used to manage the devices in the lighting control networks. RDM provides bi-directional communications between a controller and many lighting devices over the DMX512-A network. In RDM, using a simple binary search scheme, which is based on the 48-bit unique ID (UID) of each device, discovers the lighting devices. However, the existing binary search scheme tends to require a large delay in the device discovery process. In this paper, we propose a novel partition-based discovery scheme for fast device discovery in RDM. In the proposed scheme, all devices are divided into several partitions as per the device UID, and the controller performs device discovery for each partition by configuring a response timer that each device will use. From numerical simulations, we can see that there is an optimal number of partitions to minimize the device discovery time for a given number of devices in the proposed scheme, and also that the proposed partition-based scheme can reduce the device discovery time, as compared to the existing binary search scheme.

• 한국산학기술학회논문지
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• 제20권10호
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• pp.159-168
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• 2019

급격한 환경변화에 속에서 창의성이 조직 생존을 위한 경쟁우위 요인으로 강조된 이 후, 많은 학자들은 어떻게 하면 창의성을 향상시킬 수 있는지에 대해 관심을 가져왔다. 수많은 조직들이 효율적인 업무처리를 위해 팀 제를 도입하고 있는 현 상황에서 팀 창의성에 대한 관심 역시 증가하는 추세이다. 본 논문에서는 팀 창의성에 대한 이해를 목표로 팀 학습목표 지향성을 선행요인으로 고려한다. 특히, 팀 학습목표 지향성과 팀 창의성 사이의 관계를 설명하는 서로 다른 팀 프로세스(예, 팀 성찰, 팀 효능감, 긍정적 집단 정서 분위기(PGAT: Positive Group Affective Tone, 이하 PGAT))를 밝히는데 목적을 둔다. 본 연구의 분석 자료를 수집하기 위해 서울소재의 한 경영대학에서 개설하는 세 개의 경영학 전공 강좌의 수강생 187명(57개 팀)을 대상으로 설문조사를 실시하였으며, 위계적 회귀분석을 방법을 사용하여 자료를 분석하였다. 분석 결과, 팀 학습목표 지향성은 팀 창의성과 정(+)적으로 관련하는 것으로 나타났으며, 팀 성찰과 팀 효능감을 정(+)적으로 예측하였다. 또한, 팀 성찰과 팀 효능감은 팀 창의적 성과를 유의미하게 예측하였으며, 동시에 팀 학습목표 목표 지향성과 팀 창의성 사이를 매개하는 사실을 확인할 수 있었다. 하지만, 예측과 달리 PGAT는 팀 학습목표 지향성과 팀 창의성과는 통계적으로 관련성이 없는 것으로 나타났다. 이와 같은 본 연구 결과는 다양한 이론적, 실무적 시사점을 가진다.

• 동아시아경상학회지
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• 제9권3호
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• pp.57-69
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• 2021

Purpose - The purpose of this research is to test the impact of social connectedness and team psychological safety on the relationship between transformational leadership and employee performance (job performance and practiced creativity), and moderating role of usage frequency of SNS. Research design, data, and methodology - A total of 299 questionnaires, completed by Chinese employees, were analyzed using SPSS 22 and AMOS 22. For the assessment of goodness of fit of the models, TLI, CFI, RMSEA indices were used. Result -The empirical results are as follows. First, social connectedness had a mediating effect in the relationship between transformational leadership and job performance, practiced creativity. Second, team psychological safety had a mediating effect in the relationship between transformational leadership and social connectedness, job performance, practiced creativity. Finally, the moderating effect of frequency of employee SNS usage were not significant. Conclusion -This study analyzes the mediating role of employee social connectedness and team psychological safety on the relationship between transformational leadership and job performance, practiced creativity, which is helpful for the expansion of related theories and provides practical implications for effective human resource management.