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김대원,강동욱,최용제,이상수,최병철,Kim, Daewon,Kang, Dongwook,Choi, Yongje,Lee, Sangsu,Choi, Byeongcheol 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.4
Security threats in supply-chains can be targeted at all the users who use products related to these supply-chains as well as at single equipment or individuals. This implies that these security threats can cause nationwide economic and social damages. In particular, it is true that hardware security threat analysis technology in supply-chains has significant technical barriers due to the lack of software knowledge as well as the need to study and understand undisclosed hardware designs. In this paper, we discuss the future direction of studies by introducing basic concepts and attack cases, along with domestic and foreign technology trends related to supply-chain security technology.
Quench detection method using a series type thermocouple
김대원(Daewon Kim),김진근(Jin-Geun Kim),김아롱(A-Rong Kim),박민원(Minwon Park),유인근(In-Keun Yu),심기덕(Ki-Deok Sim),김석호(Seockho Kim),조전욱(Jeonwook Cho) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper proposed a quench detection method applied to the HTS (High Temperature Superconducting) wire and the results of the test on a HTS BSCCO (Bismuth Strontium Calcium Copper Oxide) wire were discussed. A series type thermocouple was fabricated for the quench detection. Several thermocouples were welded in series connection, so the series type thermocouple has many detecting points. The temperature variation was detected at each point by using the thermo electromotive force. The feasibility of the proposed method was investigated through the quench detection tests for HTS BSCCO wire. Also, this method has several advantages such as simple structure and cost effectiveness.
김대원(Daewon Kim) 한국컴퓨터정보학회 2017 韓國컴퓨터情報學會論文誌 Vol.22 No.7
Recently in the area of ICT, the M2M and IoT are in the spotlight as a cutting edge technology with the help of advancement of internet. Among those fields, the smart home is the closest area to our daily lives. Smart home has the purpose to lead a user more convenient living in the house with WLAN (Wireless Local Area Network) or other short-range communication environments using automated appliances. With an arrival of the age of IoT, this can be described as one axis of a variety of applications as for the M2H (Machine to Home) field in M2M. In this paper, we propose a novel technique for estimating the location of a terminal that freely move within a specified area using the RSSI (Received Signal Strength Indication) in the WLAN environment. In order to perform the location estimation, the Fingerprint and KNN methods are utilized and the LMS with the gradient descent method and the proposed algorithm are also used through the error correction functions for locating the real-time position of a moving user who is keeping a smart terminal. From the estimated location, the nearest fixed devices which are general electric appliances were supposed to work appropriately for self-operating of virtual smart home. Through the experiments, connection and operation success rate, and the performance results are analyzed, presenting the verification results.
김대원(Kim, Daewon),이건영(Lee, Keonyoung),조은철(Cho, Eunchel),박상욱(Park, Sangwook),문인식(Moon, Insik),이규열(Lee, Kyuyeol),유재희(Yu, Jaehee) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
A rear contact solar cell has a potential merit of efficiency improvement by a low shading loss in front surface. a simplified module assembly. and a higher packing density. Among the rear contact solar cells. MWT. metallizationl wrap through MWT solar cells that have the bus bars on the back side and the front side metallization is connected to the back through metal filled laser fired holes in the silicon wafer. This approach has the advantages of a much more uniform appearance. The first fabrication of MWT using a multicrystalline silicon modules in our group showed 12.28% on 125mm{times}125mm active area.
반추 처리방식에 따른 미래 예측의 긍정성 차이: 긍정경험 반추에서 추상적-구체적 처리방식을 중심으로
김대원(Daewon Kim),김창대(Changdai Kim) 한국상담학회 2022 상담학연구 Vol.23 No.5
본 연구는 긍정적 상황에 대한 반추 상황에서 반추가 이루어지는 방식에 따라 긍정적인 미래 예측이 어떤 차이를 보이는지를 검증하기 위한 목적으로 수행되었다. 이를 위해 만 18세 이상 성인 268명을 대상으로 온라인 설문조사를 실시하고 스크리닝 과정을 거쳐 우울하지 않은 상태로 판별된 83명을 대상으로 ZOOM프로그램을 이용해 비대면 실험을 진행하였다. 최종 실험 참여자는 긍정 반추 설문에 응답하고 추상적 반추 집단과 구체적 반추 집단에 무작위로 배정된 후 연구자와 일대일로 반추 조작 면담을 실시하고 마지막으로 긍정적 미래 예측 수준을 평정하였다. 연구 결과, 긍정반추가 긍정적 미래 예측에 영향을 미치며 구체적 반추 집단보다 추상적 반추 집단에서 긍정적 미래 예측 수준이 유의미하게 높은 것이 확인되었다. 이를 통해 우울하지 않은 일반인들은 긍정적인 자기자질 혹은 긍정정서 경험에 대해 추상적으로 사고하는 경향이 높을수록 긍정적인 미래가 올 가능성을 높게 평가한다는 것을 확인할 수 있었다. 이상의 결과를 바탕으로 본 연구의 학술적, 상담 실제적 의의와 제한점 및 추후 연구를 위한 제언 등을 논의하였다. This study was conducted with the aim of verifying the difference in positive future prediction in abstract and concrete rumination groups. An online survey was conducted on 268 adults aged 18 and older, and a non-face-to-face experiment with ‘ZOOM’ was conducted on 83 participants who were determined not depressed through the screening process. After completing online pre-measurements, participants were randomly assigned to either the abstract rumination group or the concrete rumination group, which the researcher then conducted a one-on-one rumination manipulation interview. After the completion of the rumination test, participants rated the level of positive future prediction. The results are as follows: impact of positive rumination on positive future prediction was significant, and the level of positive future prediction is significantly higher in the abstract rumination group than in the concrete rumination group. It was confirmed that the higher the tendency of non-depressive people to think abstractly about positive self-quality or positive emotional experiences, the higher the likelihood of a positive future prediction. Based on the results, academic and counseling practical implications, limitations of the study and suggestions for follow up studies were discussed.
N-스크린 환경 하에서 신문사의 통합형 플랫폼에 대한 사용자 지불의사 연구
김대원(Daewon Kim),김민성(Min Sung Kim),양승호(Seungho Yang),김성철(Seongcheol Kim) 한국경영과학회 2014 經營 科學 Vol.31 No.4
This paper investigated customers’ willingness to pay (WTP) for the integrated news platform, which is a paid digital news service provided by Korean newspapers. The integrated news platform has been widely employed and regarded as an alternative to recover dramatically decreasing sales of newspapers since N-Screen era began. This study employed a conjoint analysis to examine WTP for the integrated news platform and its attributes. According to the results, WPT for the integrated news platform was estimated as 4543.6 won, which is only 30.3% of the real price. Digitalized newspaper and premium news were found to be significant attributes explaining customers’ WTP. The results of this paper implies that present marketing strategies for the integrated news platform of Korean newspapers should be reconsidered and revised.