• Journal of Computational Design and Engineering
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• 제1권4호
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• pp.289-297
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• 2014

Although big-sized markers are good for accurate marker recognition and tracking, they are easily occluded by other objects and deteriorate natural visualization and level of immersion during user interaction in AR environments. In this paper, we propose an approach to exploiting the use of rectangular markers to support tangible AR interaction based on fingertip touch using small-sized markers. It basically adjusts the length, width, and interior area of rectangular markers to make them more suitably fit to longish objects like fingers. It also utilizes convex polygons to resolve the partial occlusion of a marker and properly enlarges the pattern area of a marker while adjusting its size without deteriorating the quality of marker detection. We obtained encouraging results from users that the approach can provide better natural visualization and higher level of immersion, and be accurate and tangible enough to support a pseudo feeling of touching virtual products with human hands or fingertips during design evaluation of digital handheld products.

• 산업경영시스템학회지
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• 제35권3호
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• pp.110-117
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• 2012

A product family design has received much attention over the last several decades, since a product family-based development shortens lead-times and reduces cost, as well as increases efficiency and effectiveness of the product realization process. It is challenging work, however, to define the product family design in the heterogeneous product development environments, due to myriads of products related information described in different ways across products in any companies. In this paper, we provided a way of defining product family design framework using formal concept analysis and ontology language. Based on this, the specific product family can be derived by ontological reasoning, and the new product concept can be also expanded in the framework. The proposed framework is formalized using OWL (Web Ontology Language) and implemented in $Prot{\acute{e}}g{\acute{e}}$. Actual product family design algorithm is carried out using FaCT++ engine, a plug-in to $Prot{\acute{e}}g{\acute{e}}$, and the benefits of the proposed method are also demonstrated through a case study.

• 산업경영시스템학회지
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• 제29권1호
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• pp.34-40
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• 2006

Many producers put sampling inspection policy into the way of their convenience. Examples of the convenience are irregular lot size and too small sample size. Because they don't use a standard sampling inspection policy, they can not guarantee the quality level of their products. In this study, we developed a user-centered design program which can calculate the AOQL of their products to their buyers in the case of irregular lot size and too small sample size. Also this program propose a linear inspection cost by Hald's model.

• 산업공학
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• 제8권1호
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• pp.15-21
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• 1995

Since anthropometric data are essential to the design of industrial products, the national anthropometric survey was performed three times in Korea. An Anthropometric Data Manager system (ADaM) was implemented based on the 1992 national anthropometric survey to promote the utilization of the data. The system provides graphic user interface to facilitate usability. Anthropometric information can be obtained in various ways by the following statistical analyses; multivariate features analysis, correlation analysis, and regression. In addition, recommendations for design parameters of industrial products were provided in this system.

• Industrial Engineering and Management Systems
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• 제9권1호
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• pp.1-9
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• 2010

Increasing product variety based on product family and product platform provides a company with a competitive advantage over its competitors. As products become more complex, short-life cycled and customized, the design efforts require more knowledge-intensive, collaborative and coordinating efforts for information sharing. By sharing knowledge, information, component and process across different families of products, the product realization process will be more efficient, cost-effective and quick-responsive. Formal Concept Analysis (FCA) is used for analyzing data and forming semantic structures that are formal abstractions of concepts of human thoughts. A Web Ontology Language (OWL) is designed for applications that need to process the content of information instead of simply presenting information to humans. OWL also captures the evolution of different components of the product family. The purpose of this paper is to develop product variety modeling to increase the usefulness of common platform. In constructing and analyzing product ontology, FCA is adopted for conceptual knowledge processing. For the selected product family, product variety Ontology is constructed and implemented using prot$\'{e}$g$\'{e}$-2000.

• 한국산업정보학회논문지
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• 제7권1호
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• pp.66-74
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• 2002

판매되는 제품에 대한 보증비용은 소비자의 사용정도에 관계없이 일정하다고 가정한다. 하지만 현실적으로는 소비자들에 따라 사용 정도가 서로 다를 수 있다. 사용정도와 예방보수 형태는 보증비용 책정에 중요한 역할을 할 수 있다. 따라서, 본 논문에서는 소비자에 따라 사용정도가 다르고 예방보수 정책의 형태가 서로 다른 경우에 대한 제품의 기대보증 비용을 산출할 수 있는 새로운 보증비용 모형을 제시했다.

• 방사선산업학회지
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• 제8권2호
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• pp.71-76
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• 2014

Endocrine disrupting chemicals (EDCs) and potential EDCs are mostly man-made, found in various materials such as pesticides, additives or contaminants in food, and personal care products. The high energy ionizing radiation has the ability to remove the EDCs with a very high degree of reliability and in a clean and efficient manner. The ionizing radiation interacts with EDCs both directly and indirectly. Direct interaction takes place with EDCs and the structure of EDCs is destroyed or changed. During indirect interaction, radiolysis products of water result in the formation of highly reactive intermediates which then react with the target molecules, culminating in structural changes. To confirm the radiation reduction of EDCs in industrial sludge, a pilot scale experiment up to 50 kGy of electron beam (EB) was conducted with samples from the textile dyeing industries. The experimental result showed the over 90% of reduction of Nonylphenol (NP) and Di(2-ethylhexyl) phthalate (DEHP) at around 10 kGy of absorbed doses.

• Journal of the Korean Wood Science and Technology
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• 제50권3호
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• pp.159-166
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• 2022

CO₂ emissions are the primary reason for global warming; hence, biological and chemical technologies for converting CO₂ into useful compounds are being actively studied. Biological methods using enzymes can convert CO₂ under mild conditions. Formate dehydrogenase (FDH) is a representative CO₂ conversion enzyme. Its function was revealed after isolation from bacteria, yeast, and plants. In this study, we evaluated the CO₂ conversion potential of FDH isolated from wood-rotting fungi. After isolating the FDH gene (TvFDH) from Trametes versicolor, we cloned the full-length FDH from T. versicolor and expressed it in a cell-free expression system. The gene encoding TvFDH was identified as 1,200 bp open reading frame (ORF) and the expected molecular weight of the protein was approximately 42 kDa. Overexpression of the recombinant crude protein including TvFDH was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Enzyme activities and metabolite analyses confirmed the efficiency of TvFDH for CO₂ reduction.

• 생명과학회지
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• 제27권10호
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• pp.1185-1190
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• 2017

세계적으로 곤충시장이 매년 성장하는 가운데 우리나라에서도 곤충산업이 미래 유망 산업으로 주목 받고 있다. 뿐만 아니라, 최근 갈색거저리와 쌍별귀뚜라미, 흰점박이꽃무지 및 장수풍뎅이가 일반식품원료로 등록됨에 따라 식용곤충에 대한 관심이 늘고 곤충의 대량사육이 전국적으로 이루어지고 있다. 이에 안전하고 고영양성분이 포함된 식용곤충 전용 먹이원 개발 연구가 필요하다. 최근 들어 각종 부존자원의 사료화는 부존자원의 활용, 사료비 절감, 환경보존 등의 효과를 거두고 있는 것으로 나타나고 있다. 따라서 식용곤충으로 많이 사육되고 있는 흰점박이꽃무지의 생육을 촉진하면서 경제적이고 안정적인 사육을 도모하기 위해 감귤박, 비지박, 대두박, 맥주박 등 4종의 부존자원을 이용하여 효과를 조사하였다. 10% 비지박을 급여한 유충의 무게가 대조구 대비 약 3.5배 증가하였고, 유충기간 또한 40% 이상 단축되었다. 또한, 10% 비지박 첨가 실험구에서 일반조성분과 미네랄 및 아미노산의 함량이 전체적으로 높은 것으로 나타났다. 중금속 함량 분석 결과, 납과 카드뮴 및 비소는 모든 실험구에서 검출되지 않았다. 본 연구결과는 흰점박이꽃무지 유충의 생육 촉진 효과를 가지는 비지박이 곤충 먹이원의 소재로 활용될 수 있음을 보여준다.

• 산업경영시스템학회지
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• 제38권4호
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• pp.168-176
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• 2015

Trends of integrating products and services lead to the emergence of Product-Service System (PSS). To implement and embody a PSS solution in new product development, a comprehensive design framework is allowed designers to facilitate the design factors of the PSS in complex business environments. A physical product, containing functionalities for services, is the role of medium between customers and a manufactures. Customers can access those metaphysical interfaces to utilize the product fully or expand its performances. The PSS is aiming to prolong its lifecycle while maintaining its expected quality. Since the quality can be represented as a measure which belongs to user's perspective, guaranteeing certain level of quality can be interpreted to sustaining customer satisfaction. The objective of this paper is to propose a PSS design framework to identify design factors for developing products and services by integrating object-oriented concepts and blueprinting in context of a business ecosystem. The proposed model is developed based on relationship products and services matching with their design factors. The products and the services are then brought together to form a PSS. Functions and processes can be categorized to identify the design factors in different levels using the object-oriented concepts. Objected-oriented concepts provide PSS analysis tools for describing a business process or a workflow process in the PSS. The blueprint is used to identify the relationships between the products functions and the service processes that are offered as part of a job. To demonstrate of the effectiveness of the proposed model, we use a case study involving a smart phone.