• Proceedings of the Korea Information Processing Society Conference
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• 2004.11a
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• pp.3-6
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• 2004

전자상거래의 지원 시스템에서 판매지원 에이전트는 고객의 취향을 파악하여 구매자에게 가장 적절한 상품을 탐색하여 사용자의 만족도를 극대화할 수 있어야 한다. 이에 데이타마이닝의 기법 중의 하나인 사례기반추론기법을 이용한 판매지원 에이전트와 감성공학을 이용한 신제품 개발지원과 기존 제품의 리모델링을 제시하는 에이전트를 결합한 다중 에이전트 시스템을 제안하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.47-50
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• 2004

본 논문은 대량의 데이터를 처리하는 전염병에 관한 역학조사에 대한 과정을 KDD(Knowledge Discovery in Database)와 데이터마이닝 기법을 이용해서 의료 전문인들의 지식을 데이터베이스화하여 데이터 선정, 정제, 보강, 예측과 빠른 데이터 검출을 하도록 하였다. 그리고 각 바이러스의 동향은 데이터마이닝을 활용하므로 일부분만의 데이터를 산출하지 않고 전체적인 동향을 산출, 예측하도록 한다.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.460-466
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• 2015

The remaining features in this study using the Freecad proceeds according to the overall effect was not supported by the modeling Freecad were conducted a study to complement using the CATIA program or other commercially available. The focus of this study is that there can be obtained the stability through the center of gravity of the balancing of two parts by increasing the weight of the other magnet through a Fortuna other end of the weight of the bar, using the center of gravity. Finally, to find the optimal design of the weight and thickness of the main bar through the center of gravity balancing is the purpose of this study.

• Journal of Korea Multimedia Society
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• v.9 no.9
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• pp.1095-1106
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• 2006

Recently, many effort is demanded for appropriate operation and management of the Electronic commerce system. Electronic commerce system must provide information satisfying customers. To do this, many kinds of studies are being advanced about electronic commerce system using intelligent agent technology. In this paper, We propose a support system for goods based on Case-Based Reasoning(CBR) and multi-crossselling technology. The system can supply the information of goods that is suitable about customer need under specification condition with CBR technique and can search several goods approximate to customer pattern using Multi-crossselling technique.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.6
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• pp.1089-1098
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• 2007

Currently, user require is diverse on the Web. Furthermore, each web user is wishing to retrieve data or goods that hey want to look for more conveniently and more quickly. Because different search criteria and dispositions of web users, they lead to unnecessary repeated operations in order to use implemented by web designer. In this paper, we suggest the system that analyzes user patterns on the Web using the technique of log file analysis and transfers more effectively the information of web sites to users. And we analyze the log file for customer data in the system the proposed method are implemented by means of EC-Miner that is one of the tool of datamining, and aims to offer appropriate Layout corresponding with personalization by giving weight to each transport path.

• Journal of the Korean Society of Safety
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• v.38 no.6
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• pp.60-71
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• 2023

The purpose of this study is to propose a quantitative toxicity endpoint distance suitable for the initial response of firefighters by comparing and analyzing the commonly applied toxic level of concern (T-LOC), specifically emergency response planning guidelines (ERPG), acute exposure guideline levels (AEGL), and immediately dangerous to life or health (IDLH). This is to protect the fire brigade, which responds to toxic chemical accidents first during the golden time. Using areal locations of hazardous atmospheres, a damage prediction program, the amount of leakage for both acidic and basic substances, along with the endpoint distance, were analyzed for alternative accident and worst-case accident scenarios. The results showed that the toxicity endpoint distance, serving as a compromise between Level-3 and Level-2 of T-LOC, was longer than ERPG-3 and shorter than ERPG-2 with IDLH, while its values were analyzed in the order of ERPG-2, AEGL-2, IDLH, AEGL-3, and ERPG-3. It is suggested that the application of IDLH in an emergency (red card) and ERPG-2 endpoint distance in a non-emergency (non-red card) can be utilized for the initial response of the fire brigade.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.579-589
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• 2016

This study examined the effects of adults' participation motives for lifelong learning, and satisfaction and learning outcomes on social capital formation. The subjects were 354 adult learners, who were over 20 years of age. They had a lifelong learning experience in various lifelong education institutes and facilities located in the D provincial areas. The statistical methods of this study were correlation analysis, multiple regression analysis and path analysis. The results showed that the adults' participation motives for lifelong learning had positive effects on the social capital formation, and it had effects on the satisfaction and learning outcomes. Adult learners' satisfaction and learning outcomes had positive effects on the social capital formation. In addition, there were mediating effects between adult learners' participation motives and social capital formation. This study is meaningful for the development of lifelong learning by providing theoretical and practical implications.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2017.05a
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• pp.129-129
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• 2017

열전재료는 열에너지를 전기에너지로 또는 전기에너지를 열에너지로 직접 변환하는데 가장 널리 사용되는 재료이다. $Bi_2Te_3$계 열전 재료는 400K 이하의 비교적 저온 영역에서 높은 성능지수(Dimensionless Figure of merit, ZT($={\alpha}2{\sigma}T/{\kappa}$, ${\alpha}$: 제백계수, ${\sigma}$: 전기전도도, T: 절대온도, ${\kappa}$: 열전도도))를 나타내는 열전재료이며 자동차 시트나 정수기 등에 응용되고 있다. 열전모듈은 제조시 수십 개에서 수백 개 이상의 n형 및 p형 열전소자를 알루미나($Al_2O_3$)와 같은 세라믹 기판(substrate) 상에 접합된 동 전극 위에 전기적으로 서로 직렬로 접합시켜 제조한다. 기존의 열전모듈의 제조방법에는 동 전극 위에 위에 Sn합금 분말과 플럭스(flux)의 혼합물인 솔더페이스트를 스크린 인쇄법을 사용하여 동 전극에 도포한 다음, 그 위에 열전소자를 얹고 약 520K의 열풍을 가하여 솔더를 용융시켜 열전소자와 동 전극을 접합시킨다. 스크린 인쇄법에서는 인쇄 압력이 일정하지 않으면, 솔더페이스트 층의 두께가 균일하지 않게 되어 열전소자 접합부의 불량을 유발시킨다. 그러나 열모듈은 단 하나의 접합 불량이 모듈 전체의 열전변환성능에 심각한 영향을 줄 수 있기 때문에 본 연구에서는 이러한 문제점을 해결하기 위해, 솔더페이스트를 도포하지 않고 열전소자를 직접 동 전극과 접합할 수 있는 방법을 고안하였다. 무전해도금을 이용한 니켈층을 형성시킨 $Bi_2Te_3$계 열전소자 표면에 약 $50{\mu}m$의 주석도금층을 전기도금법을 구사하여 형성시켰다. 그 후, wire cutting을 통하여 $3mm{\times}3mm{\times}3mm$의 크기로 절단한 주석도금된 열전소자를 동 전극에 얹고 1.1KPa의 압력을 가하면서 523K의 핫플레이트 위에서 3분간 방치하여 직접(direct) 열압착 접합을 실시하였다. 접합부의 단면을 SEM을 이용하여 관찰한 결과, 동 전극과 열전소자 사이의 계면에 용융 후 응고된 주석층이 결함없이 균일하게 형성된 양호한 접합부를 관찰할 수 있었다. 따라서, 솔더페이스트를 이용하지 않고, 열전소자 표면에 주석도금을 실시한 후, 동 전극과 직접 열압착 본딩을 실시하는 방법은 균일한 접합계면을 얻을 수 있는 새로운 공정으로 기대된다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.4
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• pp.875-885
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• 2010

CBR (Case-Based Reasoning) is a technique to infer the relationships between existing data and case data, and the method to calculate similarity and Euclidean distance is mostly frequently being used. However, since those methods compare all the existing and case data, it also has a demerit that it takes much time for data search and filtering. Therefore, to solve this problem, various researches have been conducted. This paper suggests the method of SE(Speed Euclidean-distance) calculation that utilizes the patterns discovered in the existing process of computing similarity and Euclidean distance. Because SE calculation applies the patterns and weight found during inputting new cases and enables fast data extraction and short operation time, it can enhance computing speed for temporal or spatial restrictions and eliminate unnecessary computing operation. Through this experiment, it has been found that the proposed method improves performance in various computer environments or processing rate more efficiently than the existing method that extracts data using similarity or Euclidean method does.

• Journal of the Earthquake Engineering Society of Korea
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• v.24 no.5
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• pp.211-217
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• 2020

Earthquake preparedness has become more important with recent increase in the number of earthquakes in Korea, but many existing structures are not prepared for earthquakes. There are various types of liquefaction prevention method that can be applied, such as compaction, replacement, dewatering, and inhibition of shear strain. However, most of the liquefaction prevention methods are applied before construction, and it is important to find optimal methods that can be applied to existing structures and that have few effects on the environment, such as noise, vibration, and changes in underground water level. The purpose of this study is to estimate the correlation between the displacement of a structure and variations of pore water pressure on the ground in accordance with the depth of the sheet file when liquidation occurs. To achieve this, a shaking table test was performed for Joo-Mun-Jin standard sand and an earth pressure, accelerometer, pore water pressure transducer, and LVDT were installed in both the non-liquefiable layer and the liquefiable layer to measure the subsidence and excess pore water pressure in accordance with the time of each embedded depth. Then the results were analyzed. A comparison of the pore water pressure in accordance with Hsp/Hsl was shown to prevent lateral water flow at 1, 0.85 and confirmed that the pore water pressure increased. In addition, the relationship between Hsp/Hsl and subsidence was expressed as a trend line to calculate the expected settlement rate formula for the embedded depth ratio.