• 한국농공학회논문집
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• 제57권6호
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• pp.107-115
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• 2015

The objective of the this study is to find the breakage index and changes in permeability of Bottom ash from thermoelectric power plants in Korea. Bottom ash was crushed by compaction according to compaction energy from 0 to $1661.4\;kN/m^2$. The particle size distribution was estimated by sieve analysis. The various breakage indexes were used for analyzing the change in particle size distribution and effect of compaction energy. In the result, breakage indexes were increased as compaction energy and initial upper 4.75 mm diameter ratio, but values and tendencies of breakage indexes appeared in different as calculation method of breakage indexes. The coefficient of permeability was decreased with particle breakage, but decreasing ratio of permeability was very small. Bottom ash has a higher permeability than the weathered soil and it is considered high usability as a permeable materials.

• 한국BIM학회 논문집
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• 제12권1호
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• pp.23-34
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• 2022

In the current 2D-based design, design reliability is lowered due to interference and inconsistency between plans, errors in drawings and quantities, etc. At the time of transition to BIM-based 3D design, it is necessary to expand the reliability and usability of BIM by eliminating these errors from the design stage through securing the quality of the BIM digital model. Therefore, in the railway infrastructure design stage, the quality management process and standards of the BIM digital model were defined and quality management index were developed. Based on the rule extracted from the quality management index, a pilot quality management was conducted in connection with the commercial Model-Checker rule, problems and improvement plans were derived, and a rule-based automated quality management plan was prepared.

• 한국콘텐츠학회논문지
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• 제12권7호
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• pp.346-357
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• 2012

본 연구는 Kano모델을 활용하여 커피전문점의 다양한 품질요인들의 속성을 소비자의 관점에서 분류하였다. 또한, 각 품질요인들이 고객만족 또는 고객불만족에 미치는 상대적 영향력을 분석하기 위해 만족계수와 불만족계수를 산출하였다. 아울러, Kano모델의 한계점을 보완하고 품질요소들에 대한 커피전문점의 품질개선 여지를 파악하기 위해 잠재적 고객만족개선지수(PCSI Index)를 제시하였다. 분석결과, 매력적 품질요소에는 저렴한 가격, 실내인테리어의 고급스러움, 테이블과 의자의 편안함, 무선인터넷 사용의 편리성이 포함되는 것으로 나타났다. 한편, 일원적 품질요소로는 매장의 청결 및 위생, 가격 대비 품질인 것으로 나타났다. 잠재적 고객만족개선지수(PCSI Index)를 산출하기 위해 카페베네와 스타벅스의 만족도를 분석한 결과, 저렴한 가격, 가격 대비 품질 등에서 고객만족 개선 여지가 높은 것으로 나타났다. 본 연구결과는 커피전문점 경영에 있어서 고객만족과 향후 경쟁력 확보를 위해 우선적으로 관심을 두고 개선해야 할 품질요소가 무엇인지에 대한 시사점을 제공해 준다는 점에서 의의를 찾을 수 있다.

• 정보관리연구
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• 제37권2호
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• pp.21-31
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• 2006

TS사(구 ISI)의 SCI는 최근 들어 우리나라에서 학술적 성과를 반영하는 지표로 선호되고 있다. 국내에서도 일부 기관이 국내 문헌의 인용색인 데이터베이스 구축을 본격적으로 진행하고 있다. 이들 국내 사업의 구축결과가 제대로 결실을 맺기 위해서는, TS사의 SCI 영향력지수가 가지는 한계점을 인식하고 이를 보완하거나 대체하는 다양한 지표를 검토해야 한다. 이 연구에서는 국내 인용색인 데이터베이스가 가진 가능성을 최대한 활용하기 위해서 적용가능한 다양한 지표를 실제 사례와 함께 검토하였다.

• 감성과학
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• 제17권3호
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• pp.129-142
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• 2014

오늘날 고령인구의 증가와 장애인 인구의 증가로 인해 재활훈련기의 수요가 증가하고 있고, 재활훈련기와 사용자간의 제공받아야 할 서비스에 대한 평가 요소의 요구가 커지고 있다. 본 연구에서는 재활훈련기 디자인 평가에 있어서 평가 방안을 모색하기 위해 디자인 평가를 위한 기본 요소를 파악하고 이를 통하여 재활의료전문가, 의공학자, 디자이너들의 토의 및 분석, 실험을 통하여 새로운 평가 요소들을 도출하였다. 연구의 결과는 다음과 같이 요약된다. 첫째, 기존 디자인 평가 요소들을 수집, 분석하여 10가지의 재활훈련기 디자인 평가요소와 44개의 세부 평가항목을 구축하였다. 이는 앞으로 재활훈련기를 디자인하는데 있어서 중요한 평가 기준이 될 것이다. 둘째, 헬스케어 재활훈련기 디자인 개발 시 고려해야 할 디자인 평가요소로는 사용성, 인지성, 안전성, 학습성, 운동성, 내구성, 경제성, 공간성, 심미성, 환경성의 10가지 디자인 평가요소가 있다. 셋째, 환경성, 공간성, 인지성, 사용성, 경제성, 심미성의 디자인 평가요소는 제품디자인에서 공통적으로 고려해야 할 요소들이고, 학습성, 안전성, 운동성, 내구성의 요소는 재활훈련기 디자인 평가요소에서 매우 중요하게 고려해야 할 요소이다. 넷째, 재활훈련기 디자인 평가요소는 제품디자인요소에서 중요하게 고려되는 환경성, 공간성, 인지성, 사용성, 경제성, 심미성에 학습성, 안전성, 운동성, 내구성을 의 요소를 더해 중요하게 생각한 것이 기존 제품디자인 평가요소와 재활훈련기 디자인 평가요소의 차이점이다. 본 연구에서는 10개의 재활훈련기 디자인 평가요소와 44개의 세부 평가항목 구축에 대한 연구를 진행하였다. 이는 전체적인 재활훈련기 디자인 평가요소만을 연구한 것으로, 향후연구에서는 시 제품 제작을 통하여 평가요소들을 실제 재활훈련기 디자인에 적용해 보고, 미진한 점들을 수정 보완할 예정이다.

• 한국방사선학회논문지
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• 제9권5호
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• pp.287-293
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• 2015

식도암은 병변의 길이가 길고 깊이의 불균질성으로 인하여 방사선의 균일한 선량분포를 얻기 어렵다. 이러한 문제점을 개선해 보고자 Half beam 법을 이용하여 선량분포의 균질성을 극복해 보고자 환자의 영상을 바탕으로 하여 Normal beam과 Half beam을 이용하여 각각 치료계획을 세워 표적체적포함율과 선량체적곡선, 일치성지수와 균질성지수를 상호 비교하고, 인접정상장기인 심장, 척수, 폐를 비교해 보고자 한다. 실험결과 Half beam을 이용한 치료계획이 표적체적포함율과 선량체적곡선 그리고 일치성지수와 균질성지수가 우수하였으며 정상조직 보호측면에서도 미미하지만 우수한 것으로 나타났다. 하지만 정확한 환자자세가 확보되지 않으면 부작용이 발생할 수 있다. 따라서, 기하학적으로 정확한 환자의 위치잡이를 수반한 Half beam의 적용은 선량적으로 유용할 수 있을 것으로 사료된다.

• 대한인간공학회지
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• 제25권4호
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• pp.51-62
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• 2006

The concept of universal design has recently emerged as an important aspect of product design. Universal design is considerably analogous to ergonomic design in a way that it takes the capabilities and limitations of users into consideration during the product development process. However, relatively few studies have been devoted to reflect the practical use of ergonomic principles on universal design. This research attempts to develop a universal design index for mobile phone design to quantify how well a product complies with principles of universal design. The research also emphasizes on ergonomic principles as a basis of evaluation. A generation of the evaluation items was done by cross-checking among the personal, activity and product components. Personal components consist of human characteristics including age, physique, perceptual capacity, life-style, etc. Activity components were derived from those scenarios of mobile phone use while product components were composed of the parts to which a user interacts. Further analysis systematically generated a universal index from relationship matrices among the three components. The index was then used to test its suitability by applying to the evaluation of mobile phones currently on the market. This study demonstrates a development process through which evaluations can be made possible for universal design. The research suggests an improved approach to the appraisal of how well mobile phones are universally designed based on ergonomic principles.

• 대한인간공학회지
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• 제26권4호
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• pp.57-64
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• 2007

In the world, the old population is growing fast and many countries went into an advanced age society. Therefore the development of everyday products, electric appliances, and welfare services considering old people is more important than ever. In particular, the complexity of products can cause many problems for old people. Universal design is an approach to create environments and products that recognizes the diversity of users, regardless of their ability or age. Universality evaluation for a product is very important to verify old people's accessibility and usability for the product. Universality means how good a product was designed in view of universal design principles. In this study, UNIX, a method to evaluate the universality of a product was developed. UNIX was based on seven universal design principles; equitable use, flexibility in use, simple and intuitive, perceptible information, tolerance for error, low physical effort, size and space for approach and use. UNIX is a kind of expert evaluation and very simple method. The method is consisted of two steps. In the first step, relative weights for seven principles and subjective ratings on design suitability for each principle are obtained. In the second step, universality index (UNIX) of each product is obtained by weighted average multiplying relative weights and rating scores. As a case study, this method was applied for mouse designs. In conclusion, this method could be effectively applied to evaluate the universality of a product.

• Journal of Positioning, Navigation, and Timing
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• 제12권4호
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• pp.423-430
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• 2023

One recent notable method for real-time elimination of ionospheric errors in geodetic applications is the Predicted Global Ionosphere Map (PGIM). This study analyzes the level of accuracy achievable when applying the PGIM provided by the Center for Orbit Determination of Europe (CODE) to the Korean Peninsula region. First, an examination of the types and lead times of PGIMs provided by the International GNSS Service (IGS) Analysis Center revealed that CODE's two-day prediction model, C2PG, is available approximately eight hours before midnight. This suggests higher real-time usability compared to the one-day prediction model, C1PG. When evaluating the accuracy of PGIM by assuming the final output of the Global Ionosphere Map (GIM) as a reference, it was found that on days with low solar activity, the error is within ~2 TECU, and on days with high solar activity, the error reaches ~3 TECU. A comparison of the errors introduced when using PGIM and three solar activity indices-Kp index, F10.7, and sunspot number-revealed that F10.7 exhibits a relatively high correlation coefficient compared to Kp-index and sunspot number, confirming the effectiveness of the prediction model.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.487-492
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• 2011

As a knowledge-based economy is emerging, knowledge management (KM) is being rapidly disseminated in both academic circles and the business world. Accordingly, how to effectively manage knowledge is vital to the survival and advance of a company, particularly in project-based industries such as construction. For these reasons, construction companies have adopted IT-based Knowledge management systems (KMS), which is the technology platform and infrastructure that an organization employs to support knowledge management. However, many construction companies have spent resources on developing a KMS that only focus on codification. Furthermore, small and medium-sized companies have limited resources to afford extensive investments. This research addresses the problems found in the current KMS and develops a web-based construction knowledge management portal (CKMP). To achieve these objectives, a case study is conducted and requirements for implementing KM are identified. Based on the identified requirements, this paper builds CKMP using Expert Index (EI), blog, ontology based knowledge retrieval, and wikiblog. The most important functionality of CKMP is their fundamentals to synchronize and support KM process. In order to validate the CKMP, a pilot test with actual users is conducted, and the usability of the system is compared with the current systems. This study is relevant to both the construction industry and academia, as it provides a means of enhancing the performance of KM.