• 대한방사선기술학회지:방사선기술과학
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• 제29권3호
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• pp.133-139
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• 2006

디지털 X선영상으로 출력한 화상데이터를 Personal Computer로 가져와서 디지털 특성곡선, MTF, 위너스펙트럼을 계산할 수가 있다. 여기서는 디지털화상의 선예도를 후지타(藤田) 등의 이론에 의한 프리샘플링(presampling) Modualtion Transfer Function(MTF)을 산출하고 보정하는 방법에 대하여 검토하였다. 사용한 프로그램은 엑셀이며 슬릿의 촬영, 디지털 특성곡선, 합성 LSF법, 이산 퓨리어 변환, 고속 퓨리어 변환 등의 순서로 기술하였다. 이 방법의 커다란 장점은 퓨리어트랜스폼의 공식과 MTF 산출과정을 완전히 이해할 수 있다는 점과, 별도로 값비싼 프로그램이나 컴퓨터언어를 배우지 않았어도 MTF 결과를 산출할 수가 있다는 것이다. 그리고 워크시트 표시되는 엑셀의 장점을 그대로 살려 X선 영상계의 오류나 산출결과의 부적합성을 발견하기 쉽다는 점이다.

• 기술혁신학회지
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• 제12권3호
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• pp.638-661
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• 2009

지난해 신정부 출범과 더불어 국가연구개발사업의 관리제도를 연구자 친화적으로 개선하기 위한 다양한 논의가 있었다. 그 결과로서 국가연구개발성과물의 지식재산권 단독소유 원칙이 강화되었고 비영리기관이 징수하는 기술료의 정부환수제도가 폐지되었다. 그럼에도 불구하고 국가연구개발사업과 관련된 지식재산권 관리법제는 여전히 많은 모순점을 보유하고 있다. 이에 본 연구에서는 국가연구개발사업의 특허관리와 관련된 한국과 미국의 제도를 비교 분석하여 유사점과 차이점을 확인하고 우리나라 제도의 문제점을 도출하였다. 특히 과학기술기본법 제11조의 위임규정에 따라 제정된 "국가연구개발사업의 관리 등에 관한 규정(대통령령)"의 지식재산권 귀속 및 관리 규정의 제반 문제점을 심층적으로 분석하여 국가연구개발사업의 성과관리 효율화를 위한 대안을 제시하였다. 구체적으로 본 연구에서는 한국과 미국의 "공공연구기관의 직무발명 관리제도"와 "국가R&D의 지식재산권 관리제도"를 비교 분석하였고 우리나라 국가연구개발사업의 지식재산권 관리제도의 문제점을 진단하고 개선방안을 도출하였다. 이를 통해 우리나라 국가연구개발사업의 지식재산권 관리제도 선진화를 위해서는 첫째 국가연구개발사업의 법적 성격이 국제적 기준에 맞게 조정되어야 하고, 둘째 국가연구개발사업의 지적재산권 귀속법제를 개선하고 통일할 필요가 있고, 셋째 국가연구개발사업의 기술료제도에서 규제적 요소를 폐지해야 한다는 결론을 도출하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.524-527
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• 1995

In most cases, a crane is controlled by an open-loop technique. That is, the controller tries to follow a given velocity profile that is designed to minimize the swing of rope and the transfer time. But such a system is not capable of handling various disturbances such as changing rope length and wind effect. In order to overcome this kind of difficulty, this research focuses on the design of a feedback controller using intelligent techniques such as fuzzy logic and neural network. These intelligent techniques has been emplyoyed in order to represent human knowledge and to imitate human learning. The deveped controllers have been evaluated via computer simulation

• 대한안전경영과학회지
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• 제10권3호
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• pp.193-201
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• 2008

As The development and commercialization of advanced technologies will depend increasingly on efficient technology transfer and technology trading systems and the knowledge economics grows rapidly, the value of intangible assets is more emphasized in business nowadays. Intangible assets include intellectual capital and intellectual property. This requires the development of technology markets or exchanges and hence a reliable technology valuation methodology. Our focus is on the business aspects of technology' contribution and we propose an objective scoring system, which is implemented by ANP, for Technology valuation of enterprise. As a result, This study intends to evaluate the contribution of an individual technology in intangible assets by the Analytic Network Process(ANP).

• Transactions on Control, Automation and Systems Engineering
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• 제2권3호
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• pp.149-156
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• 2000

Time delay observer (TDO), thanks to the time delay control (TDC) concept, requires little knowledge of a plant model, and hence is easy to design, robust to parameter variation and computationally efficient, yet can reconstruct states rather reliable for nonlinear plant. In this paper, we propose an improved version of TDO that solves two problems inherent in TDO as follows: TDO displays large reconstruction errors due to low-frequency uncertainty and has some restrictions on selecting its gains. By introducing a low pass filter and a state associated with it, we obtain an enhanced time delay observer (ETDO). This observer turns out to have smaller reconstruction errors than those of TDO and not to have any restriction on selecting its gains, thereby solving the problems. Through performance comparison by transfer function and simulation, we validate the analysis results of two observers (TDO and ETDO) and evaluate the performances. Finally, through experiments on BLDC motor system, the analysis results are clearly conformed.

• 산업경영시스템학회지
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• 제35권2호
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• pp.1-8
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• 2012

The primary goal of this study is to develop proper performance indicators for evaluating the results of industrial R&D program. We define R&D results include output, transfer, outcome, and impact in the performance of R&D program. Performance indicators are focused on the results of R&D commercialization, building the industrial foundations as performance proxy of R&D program of Ministry of Knowledge Economy. And we first try to design the coupled structure as logical model between R&D program goals and performance indicators. The coupled structure is represented with objectives of group unit of R&D program, implementation process, R&D practical stage, and the ultimate goal of R&D program.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.301-306
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• 2007

Design of civil infrastructures is generally based on 2-D drawings and analyses. Design provisions also specify the limit states using member based equations. Most construction projects are done through collaboration of engineers who have different specialized knowledge. Information technologies can dramatically enhance the performance of the collaboration. For the information transfer, we need a mediator between engineers. Object based 3-D models are useful for the communication and for the owners who have to maintain whole the information of infrastructures. In this paper, basic guidelines for the 3-D design according to design phases. Adequate interoperability of 3-D objects from any CAD system is essential for the collaboration. Owners, contractors and design consultants were considered as users of 3-D objects. Cost and performance of each design phases was investigated through the existing data.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 D
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• pp.2763-2765
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• 2000

The interactions between the excavation tool and the excavation environment are dynamic, unstructured and complex. In addition. operating modes of an excavator depend on working conditions, which makes it difficult to derive the exact mathematical model of excavator. Even after the exact mathematical model is established, it is difficult to design of a controller because the system equations are highly nonlinear and the state variable are coupled. The objective of this study is to design a fuzzy logic controller (FLC) which controls the position of excavator's attachment. This approach enables the transfer of human heuristics and expert knowledge to the controller. Expeiments are carried out to check the performance of the FLC.

• International Journal of Internet, Broadcasting and Communication
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• 제13권2호
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• pp.179-186
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• 2021

We have been developed the smart tourism app and the Instagram and YouTube contents to provide personalized tourism information and travel product information to individual tourists. In this paper, we develop a rule-based smart tourism chatbot with the khaiii (Kakao Hangul Analyzer III) morphological analyzer and Neo4J graph database. In the proposed chatbot system, we use a morpheme analyzer, a proper noun dictionary including tourist destination names, and a general noun dictionary including containing frequently used words in tourist information search to understand the intention of the user's question. The tourism knowledge base built using the Neo4J graph database provides adequate answers to tourists' questions. In this paper, the nodes of Neo4J are Area based on tourist destination address, Contents with property of tourist information, and Service including service attribute data frequently used for search. A Neo4J query is created based on the result of analyzing the intention of a tourist's question with the property of nodes and relationships in Neo4J database. An answer to the question is made by searching in the tourism knowledge base. In this paper, we create the tourism knowledge base using more than 1300 Jeju tourism information used in the smart tourism app. We plan to develop a multilingual smart tour chatbot using the named entity recognition (NER), intention classification using conditional random field(CRF), and transfer learning using the pretrained language models.

• 산업공학
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• 제15권4호
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• pp.444-451
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• 2002

Recently, the interest in technology valuation is revived and increasing mainly due to the lack of suitability of the traditional valuation methods in explaining the market reaction to newly-emerging knowledge-oriented companies. Moreover, many firms are now gearing their efforts to the strategic use of technology asset such as technology licensing, transfer and commercialization. Firms are also trying to enhance their technological competitiveness by re-evaluating their technology level and thus identifying the strengths/weaknesses of their technology portfolio. To accomplish this objective, the development of an integrated evaluation system for technology assets is essential. This paper presents a technology valuation system developed for a steel manufacturing company in South Korea. The valuation framework is based on; (1) the multi-attribute evaluation of technological competitiveness using Analytic Hierarchical Process and; (2) the expected future benefit of the technology using four different methods of discounted cash flow estimation. The suggested framework will be easily applicable to various industries where technological competitiveness should be evaluated systematically.