• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 2003년도 제22회 동계학술발표회 논문집
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• pp.173-190
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• 2003

수요예측은 국가와 기업의 전략수립과 효율적인 자원활용에 있어서 필수적인 사전기획요소이다. 본 논문은 이산선택모델과 확산모델을 복합적으로 고려하여 다세대 제품의 수요를 예측하였다. 이산선택모델은 정적인 관점에서 소비자들의 제품에 대한 평가를 분석하는 모델이다. 본 논문에서는 이러한 이산선택모델에 수요의 동적인 변화양상을 고려할 수 있는 확산모델을 결합하였다. 실증분석으로서 1999년에서 2005년까지의 세계 DRAM시장 수요를 예측하였다. 또한, DRAM의 가격과 기억용량에 대해 '무어의 법칙' 과 '학습곡선'을 각각 적용한 기술예측을 시도하였으며, 이를 바탕으로 보다 정교한 예측모델을 전개하였다. 제시된 모델은 산업수준의 자료를 이용하였으므로, 이산선택모델을 inversion 하여 분석을 시도하였다. 이를 통해 기존세대의 DRAM 제품에 대한 수요뿐만 아니라, 새로운 세대의 DRAM 제품에 대한 수요를 비교적 정확히 예측할 수 있었다.

• 한국생산제조학회지
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• 제9권5호
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• pp.119-126
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• 2000

Recently, according to the various taste of consumers, the design of a product is changed variously and complicatedly. The complicated product is not usually constructed with one path but multi-path. By the way, in machining, higher precision and the reduction of leading and machining time is required. But, for the multi-patch sculptured surface, the amount of machining data becomes large. This means the increase of leading and machining time. In this study, the tool path generation method with reparameterization is proposed for multi-patch sculptured surface and variable step size using NURBS is used to satisfy the precision and to reduce leading and machining time.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2000년도 춘계학술대회논문집 - 한국공작기계학회
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• pp.647-652
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• 2000

Recently, according to the various taste of consumers, the design of a product is changed variously and complicatedly. The complicated product is not usually constructed with one patch but multi-patch. By the way, in machining, higher precision and the reduction of leading and machining time is required. But for the multi-patch sculptured surface, the amount of machining data becomes large. This means the increase of leading and machining time. In this study, the tool path generation method with reparameterization is proposed for multi-patch sculptured surface and variable step size using NURBS is used to satisfy the precision and to reduce leading and machining time.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 2부
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• pp.7-12
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• 2008

본 연구는 디지털기기 사용성향을 구성하는 요인들을 밝히고, 세대를 구분하는 것에 연구목적이 있다. 이를 위해 51개 문항으로 구성된 설문을 이용하여, 15세에서 49세에 이르는 우리나라 일반 사용자들로부터 639부의 데이터를 수거하여 요인분석, 군집분석 등의 분석을 실시하였다. 그 결과, 디지털기기 사용성향을 구성하는 11개의 요인을 추출하고, 각각 관심, 오락성, 단순성, 조작불안감, 실용성, 개성, 조작일관성, 기능의 다양성, 조작법 습득, 고장의 책임성, 대여도로 명명하였다. 이어서, 요인점수를 변수로 하는 군집분석을 실시, 전체 조사대상자를 적극적 수용자형, 소극적 추종자형, 보수적 무관심형으로 명명된 3개 군집으로 분류하였다. 그리고 연령을 변인으로 하는 교차분석을 반복적으로 실시한 후, 그 결과들을 종합함으로서, 연령이 군집출현에 강한 영향을 준다는 것을 확인하였고, 이를 바탕으로 1727세대, 2834세대, 3538세대, 3949세대의 4개가지로 세대구분하였다. 세대 외에 성별, 소득, 학력, 직업 등의 인구통계화적 변인들은 사용성향에 큰 영향을 주는 변인이 아님을 확인하였다. 이어, 이러한 세대구분 연구결과를 제품사용경험에 대한 코호트맵 선행연구결과와 비교함으로서, 3538 세대가 분기점 역할을 하는 원인에 대해 고찰하였다.

• 한국정보통신학회논문지
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• 제2권1호
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• pp.147-156
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• 1998

본 논문에서는 다치 논리를 이용한 연산기를 설계하였다. 다치 논리를 구현하기 위해서 전류모드 CMOS 회로를 이용하였으며 이진 전압모드 신호를 다치 전류모드 신호로 바꾸어 주는 인코더와 연산 결과인 다치 전류모드 신호를 이진 전압모드 신호로 바꾸어 주는 디코오더를 사용하여 기존의 이진 시스템에 적용할 수 있도록 하였으며, 승산기 설계시 부분곱 수를 줄이기 위하여 기존의 Booth 알고리즘을 확장한 4진 SD수 부분곱 발생 알고리즘을 사용하였다. 제안된 회로는 SPICE 시뮬레이션 및 FPGA Chip을 이용한 하드웨어 에뮬레이션으로 그 유효함을 확인하였다

• The Journal of Asian Finance, Economics and Business
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• 제6권1호
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• pp.149-158
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• 2019

Due to the rapid development of IT (information technology) and internet, products become smart and able to collect, process and produce information and can think of themselves to provide better service to consumers. However, research on the characteristics of smart product is still sparse. In this paper, we report the systemic development of a scale to measure the perceived product smartness associated with smart product. To develop product smartness scale, this study follows systemic scale development processes of item generation, item reduction, scale validation, reliability and validity test consequently. And, after acquiring a large amount of qualitative interview data asking the definition of smart product, we add a unique process to reduce the initial items using both a text mining method using 'r' s/w and traditional reliability and validity tests including factor analysis. Based on an initial qualitative inquiry and subsequent quantitative survey, an eight-factor scale of product smartness is developed. The eight factors are multi-functionality, human-like touch, ability to cooperate, autonomy, situatedness, network connectivity, integrity, and learning capability consequently. Results from Korean samples support the proposed measures of product smartness in terms of reliability, validity, and dimensionality. Implications and directions for further study are discussed. The developed scale offers important theoretical and pragmatic implications for researchers and practitioners.

• 한국문헌정보학회지
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• 제45권2호
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• pp.61-74
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• 2011

The author analyses the challenging activities of Japanese libraries in this decade by launching two keywords; "product-sharing" and "outcome generation." "Product-sharing" means that libraries share knowledge, skills, and records which are produced as the result of the services or in the process of activities. And "outcome generation" means that libraries generate any efficiency or effectiveness through their services to users. Using these concepts, reported are the current situation and aspects of Japanese libraries which try to make various contributions to the society; research and learning of the people, and education and training for professional librarians, and so on. In the analysis, the author shows some examples of "product-sharing" at first, including the records of reference transaction and the multi-functioned online public access catalogue. Especially, focused is on the various possibility and adoptability of the Collaborative Reference Database System of the National Diet Library of Japan. This system is one of digital reference service in Japan, and the database of reference transaction records is expected to be useful for research and academic studyies as knowledge-base of professional librarians. And the system is also expected to be a platform for LIS education and professional development in the e-learning environment. Secondly, as the examples of "outcome generation", explained are the problem-solving-type activities, and provision of the collection about books on struggling against disease and illness. A few examples of outcome in the problem-solving-type activities are these; increase of sales in the services for shop managers, business persons, and entrepreneurs, contribution to affluent daily life by providing the local information services to residents and neighbourhoods, and etc. And for both the patients with serious cases and their family or those who nurse them, books about other persons' notes or memorandum are the greatest support, and sometime healing. The author discuss the 'raison d'etre' of these activities focusing on public libraries in Japan.

• 소성∙가공
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• 제13권4호
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• pp.359-364
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• 2004

In the multi-stage former, a manufacture of hexagonal fitting nut was generated in a defective products about 70∼80% in the industry field. Products generated in defects manufactured to be a machining about 60%. Additional process increased a product cost and decreased a product rate. Therefore, it is important to predict and design a preform reducing defective products in the early stage of process design. So in the study Defects for manufacturing hexagonal fitting nut verified a cause through the finite element simulation. To reduce a defective generation. a preform designed and a designed preform verified through the finite element simulation. In conclusion, a generated defects when a hexagonal fitting nut manufactured should reduce if a round dimension of preform reduced and a part of opposition angle distributed in plenty a volume.

• Journal of Mechanical Science and Technology
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• 제19권5호
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• pp.1072-1079
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• 2005

Conceptual design is the first step in the overall process of product design. Its intrinsic uncertainty, imprecision, and lack of information lead to the fact that current conceptual design activities in engineering have not been computerized and very few CAD systems are available to support conceptual design. In most of the current intelligent design systems, approach of principle synthesis, such as morphology matrix, bond graphic, or design catalogues, is usually adopted to deal with the concept generation, in which optional concepts are generally combined and enumerated through function analysis. However, as a large number of concepts are generated, it is difficult to evaluate and optimize these design candidates using regular algorithm. It is necessary to develop a new approach or a tool to solve the concept generation. Generally speaking, concept generation is a problem of concept synthesis. In substance, this process of developing design candidate is a combinatorial optimization process, viz., the process of concept generation can be regarded as a solution for a state-place composed of multi-concepts. In this paper, genetic algorithm is utilized as a feasible tool to solve the problem of combinatorial optimization in concept generation, in which the encoding method of morphology matrix based on function analysis is applied, and a sequence of optimal concepts are generated through the search and iterative process which is controlled by genetic operators, including selection, crossover, mutation, and reproduction in GA. Several crucial problems on GA are discussed in this paper, such as the calculation of fitness value and the criteria for heredity termination, which have a heavy effect on selection of better concepts. The feasibility and intellectualization of the proposed approach are demonstrated with an engineering case. In this work concept generation is implemented using GA, which can facilitate not only generating several better concepts, but also selecting the best concept. Thus optimal concepts can be conveniently developed and design efficiency can be greatly improved.

• 한국콘텐츠학회논문지
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• 제9권11호
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• pp.120-129
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• 2009

디지털시대와 영상시대가 도래하면서 DVD 시장의 성장에 힘입어 DVD 플레이어 시장 또한 지속적으로 성장하고 있으며 이의 보급 또한 지속적으로 확대되고 있는 실정이다. 이에 본 연구에서는 영상시대의 주된 소비자라고 할 수 있는 신세대의 니즈를 충족시킬 수 있는 차별화 된 형태의 DVD 플레이어를 디자인하여 제시하였다. 기존의 획일적인 형태의 DVD 플레이어 디자인을 벗어나서 개성이 뚜렷하고 차별화 된 디자인의 DVD 플레이어 형태를 제안하였고, 사용편의성을 극대화하여 사용자 중심 디자인을 제시하였다. 단순하고 직관적인 디자인으로 사용자가 시스템에 대해 쉽게 배우고 활용할 수 있도록 하였다. 제품의 내부와 외부 그리고 하드웨어와 소프트웨어사이에 일관된 연계를 가지도록 해서 사용자가 별도의 학습과정 없이 쉽게 적응할 수 있도록 디자인하였다. 영상세대를 위한 필수적인 제품이라고 할 수 있는 DVD 플레이어 디자인 진행 시 고려해야 하는 여러 가지 항목들을 이해함으로써 향후 영상관련 제품의 디자인 작업에 대한 경쟁력을 확보할 수 있으리라 기대한다.