• 한국통신학회논문지
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• 제25권3A호
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• pp.399-405
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• 2000

본 논문에서는 블록암호시스템의 대표적인 방법인 IDEA(International Date Encryption Algorithm)알고리즘을 다룬다. IDEA 알고리즘에서의 키생성 알고리즘을 분석함으로서, 라운드별 사용되는 키 비트열과 사용되지 않는 키 비트열을 분류한다. 이를 이용하여 MA(Multiplication/Addition) 구조를 생략한 형태의 IDEA 알고리즘에 대한 MSB (Most Significant Bit) 차분에 의한 차분 분석법(differential analysis)과 입력계열과 각 라운드별 사용 키계 열의 LSB(Least Significant Bit) 비트만을 사용하는 선형 분석법(linear analysis)을 제안한다.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2006년도 춘계공동학술대회 논문집
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• pp.1707-1714
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• 2006

In order to enhance sustainable war fighting capabilities, it is important to maintain a good ammunition support system. In this paper, we evaluate the performance of Ammunition companies using Imprecise Data Envelopment Analysis (IDEA)-BCC and IDEA-Additive model, which can deal with imprecise data in DEA. In order to select a list of input and output variables, we used a multiple regression analysis. We could choose input variables that have significant effects on the output performance with stepwise regression model. From the regression analysis, the number of soldiers, officers, and ammunition warehouses were selected as the input variables. Seven out of sixteen Ammunition companies were found to be inefficient by the IDEA-BCC model. And using IDEA-Additive model, we could identify the input excess and the output shortfall in reaching at a point on the efficiency frontier.

• Journal of Information Technology Applications and Management
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• 제21권3호
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• pp.19-33
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• 2014

Crowdsourcing is a popular tool for firms to harness external knowledge and resources. One variation of crowdsourcing entails the use of corporate channels in social network services (SNS) such as Twitter to hold public idea competitions. This study examined the role of feedback interaction between participants of idea competitions. More specifically, the study examined the impact of incentives to provide feedback on other participants' ideas. We found that idea competitions where explicit incentives were introduced to elicit crowdsourced feedback in the form of qualitative comments resulted in improved idea generation performance-with more ideas generated overall, and more ideas generated through participant collaborations, through increased comment-posting activities. Based on the findings, implications for theory and practice are discussed.

• 한국멀티미디어학회논문지
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• 제17권5호
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• pp.623-630
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• 2014

While BIM software becomes popular for CAAD and architectural design educations, the affordance of BIM for students' architectural idea developments, called intra-process of communication, is still unknown. Therefore, this study conducted t-test quantitative analysis in order to the scores for feedback, idea productivity, idea development for architectural elements(form, interior space, material, and details), and creative motivation(novelty, appropriateness) using BIM and non-BIM 3D modeler. To achieve the goal, in authentic CAAD class, architecture major students proposed two office designs using those two tools, then they evaluated in which ways those tools influenced their idea developments.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2001년도 Bulletin of The 5th Asian Design Conference International Symposium on Design Science
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• pp.57.1-57
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• 2001

• 한국멀티미디어학회논문지
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• 제11권11호
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• pp.1592-1600
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• 2008

본 연구는 '캐릭터 구성 이미지 요소들의 재구성'이라는 논제를 바탕으로 하여 창의적 아이디어 발상을 돕기 위한 연구로 형태 이미지 요소들의 조합을 컴퓨팅 형태 생성에 의한 독창적이고 다양한 이미지 생성을 목적으로 하였다. 기존의 아이디어 발상법에서 벗어나 창의적 형태발상능력을 극대화시키고 사고의 한계를 극복하기 위한 디자인 발상법을 제시하기 위하여 창의적 아이디어 발상법에 대한 선행연구 중 비례를 이용한 기존 시스템인 PDS(Proportion Distort System) 아이디어 발상법의 문제점을 파악하여 보완한 창의적 아이디어 발상법인 CGS(Character Generation System)를 제시하였다. 본 연구는 영상 3D 캐릭터 디자인 개발프로세스 중 아이디어발상 또는 창조적인 이미지발상지원에 대한 한 방법으로 그 효과가 있을 것이며, 다양한 아이디어를 만들어 낼 수 있어 형태발상의 한계점을 극복할 수 있는 보조역할을 할 수 있을 것이라 기대된다.

• 대한불안의학회지
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• 제13권1호
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• pp.32-38
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• 2017

Objective : Several recent studies determined the associations of job stress with depression and suicidal idea, but the association between the number of job stress components and depression remains unclear. In the present study, we investigated the associations of the number of components of job stress with depression and suicidal idea. Methods : We studied 194,226 participants who attended employee health screenings from January to December, 2014, and completely answered all the questionnaires, including the short form of Korean Occupational Stress Scale (KOSS), the Center for Epidemiologic Study-Depression (CES-D) and suicidal idea. The presence of clinical depressive symptoms was defined as a CES-D score of ${\geq}21$. The subjects in the highest quartile of each subscale of KOSS were considered as suffering from each component of job stress. Chisquare tests, t-tests and logistic regressions were performed to compare study outcomes between groups. Results : When we included all seven components of job stress, there was no significant association of the number of the components with depressive symptoms, or suicidal idea. However, the prevalence of depressive symptoms and suicidal idea was increased only in three occupational stress subscales including job demand, job insecurity and occupational climate. When we analyzed only these 3 components of job stress, the number of job stress subscales was significantly associated with depressive symptoms and suicidal idea, even after adjustment for sex and age. Conclusion : The number of components of occupational stress was associated with depressive symptoms and suicidal idea, only in the related components.

• 한국건설관리학회논문집
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• 제7권1호
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• pp.55-63
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• 2006

건설프로젝트에서 설계VE는 그 적용효과가 크므로 체계적 절차에 따른 분석이 요구되며, 그 중 가장 중요한 부분은 우수한 아이디어를 창출하기 위한 창조 단계이다. 하지만 현행 아이디어 창출 방법인 브레인스토밍, 델파이 등을 비롯한 기법들은 아이디어 창출에 많은 시간이 소요되고 우수한 아이디어를 고안한다는 것이 쉽지가 않다. 이는 설계VE에 참가하는 대부분의 전문가들이 아이디 어 창출의 효율성이 떨어지는 방법으로 접근하는데 그 원인이 있는 것으로 판단된다. 이에 본 연구에서는 VE의 효율적 수행을 위한 방법으로 창의적 아이디어 발상기법인 ASIT(Advanced Systematic Inventive Thinking) 적용을 제안하고자 한다. ASIT는 아이디어 고안을 체계적 절차에 따라 수행하도록 지원하여 단기간에 효과적 아이디어를 창출하는데 기여할 것으로 판단된다.

• 건축역사연구
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• 제10권2호
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• pp.85-99
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• 2001

Jong Soung Kim is a rare architect in Korea who has consistently done research on the idea of the architectural technology for a long time. Therefore in order to understand Kimm's architecture, it is essential to examine his idea on the technology, which reveals the complicated relationship between divers architectural discourses. It is concerned with tectonics which was the most important theoretical movements in German architecture from the nineteenth century, the Mies van der Rohe's idea of the technology which provided the most powerful basis of modern architecture, Miesians' technological discourses which was at the height of prosperity in seventies in America, and High-tech architecture in eighties. Kimm's idea on the technology is defined as follow; 1) Kimm believe that although architecture begins in construction and materiality, it must culminate in artistic form. It's legacy of German tectonics. 2) He accepts Mies' three ideas on the technology. 'Architecture is the spatially apprehended will of the epoch.' 'Technology reveals the true nature of the will of the epoch.' 'We can attain a new beauty with the help of a new technology' 3) He takes a double attitude toward the idea on the technology of Mies followers. He accepts their architectural achievement according to technological progress, but criticize their technology-oriented attitude, deprived of spiritual enrichment. 4) Kimm's idea on the technology is distinguished from that of High-tech architect. The principal criteria exist in their different attitude toward the anonymity and the ethics of technology.

• 한국정보보호학회:학술대회논문집
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• 한국정보보호학회 1998년도 종합학술발표회논문집
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• pp.483-493
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• 1998

본 논문에서 DES를 대체하기 위해 몇 년에 걸쳐 제안된 관용 암호알고리즘의 하나인 IDEA(International Data Encryption Algorithm)의 구현을 제안하고자 한다. IDEA의 암호화 수행시간의 개선을 위하여 VHDL(VHSIC Hardware Description Language)을 이용하여 하드웨어로 설계하였고 설계된 알고리즘은 EDA tool인 Synopsys를 사용하여 Synthesis하였으며, Xilinx의 FPGA XC4052XL을 이용하여 One Chip화 시켰다. 입력 클럭으로 30MHz를 사용하였을 때, data arrival time은 780.09ns였으며, 80.01 Mbps의 속도로 동작하였다. 본 논문은 설계 언어로서 VHDL을 사용하였고, FPGA Chip에 구현하여 동작 확인을 하였다.