• Title/Summary/Keyword: Usability Index

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Breakage Index and Changes in Permeability of Bottom Ash for Use as Fill Material (성토재로의 활용을 위한 Bottom Ash의 파쇄지수 산정 및 투수계수 변화)

  • Kim, Donggeun;Son, Younghwan;Park, Jaesung;Bong, Taeho
    • Journal of The Korean Society of Agricultural Engineers
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    • v.57 no.6
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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.

Rule-based Review and Automated Quality Management Process of BIM deliverables for Railway Infrastructures (철도인프라 BIM 성과물의 품질검토 절차 및 룰 기반 적용성 검토)

  • Kang, Jeon-Yong;Hasan, Syed Mobeen;Min, Ji-Sun;An, Joon-Sang;Choi, Jae-Woong
    • Journal of KIBIM
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    • v.12 no.1
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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.

Coffee Shops' Quality Classification and Customer Satisfaction Improvement Index by KANO Model (KANO모델을 활용한 커피전문점의 품질분류와 고객만족개선지수)

  • Shin, Bong-Sup;Kim, Ki-Suk
    • The Journal of the Korea Contents Association
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    • v.12 no.7
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    • pp.346-357
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    • 2012
  • This study classified the various quality features of coffee shop by Kano model with customers' perspective. Also both satisfaction coefficient and dissatisfaction coefficient are calculated to analyse the relative influence of quality features on customer satisfaction. This study also dragged the potential customer satisfaction improvement index to scrutinize the quality improvement possibility for coffee shops. The analysis results showed that low price, luxurious interior, restfulness of table and chair, usability of wireless internet are belonged to the Attractive quality. On the other hand, cleanliness and hygiene, quality to price are identified as the One-dimensional quality. The current satisfaction level for both 'Caffe Bene' and 'Starbucks' are measured to draw the potential customer satisfaction improvement index. The result showed that low price and quality to price appeared to be the highest in its quality improvement possibility. The findings of this study help understanding the quality features to focus on and strengthening the competitiveness for coffee shops.

A Study on Bibliometric Indices for Utilizing Korean Science Citation Index (KSCI 활용을 위한 지표에 관한 연구)

  • Choi, Kwang-Nam;Lee, Jae-Yun;Cho, Hyun-Yang
    • Journal of Information Management
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    • v.37 no.2
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    • pp.21-31
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    • 2006
  • Methodology Science Citation Index, developed by TS, has been used as an indicator to evaluate academic and research performance in worldwide research environment, as the world goes. With this trend, Korean Science Citation Index(KSCI) databases for domestic journals in the field of science and engineering have been constructed by some institutes such as KISTI, KRF, KOSEF, and so on. Many institutes in Korea are accepting the Impact Factor(IF) and SCI databases, proposed by TS as toolkits for evaluating research capability of their members without any criticism. However, the IF, mostly used as an analyzing tool, has been criticized by many different sectors. The validity of IF has been examined and/or complimented by a case study. In this study various indices as substitutes for IF are scrutinized and examined to maximize the usability of KSCI database.

A Study of Evaluation Index Development of Healthcare Rehabilitation Device Design (헬스케어 재활훈련기 디자인 평가 요소 개발에 관한 연구)

  • Cho, Jae Sang;Kwon, Tae Kyu;Hong, Jung Pyo
    • Science of Emotion and Sensibility
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    • v.17 no.3
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    • pp.129-142
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    • 2014
  • Due to the increase of the aged population and population of the disabled today, there is a growing demand for rehabilitation medical instruments. Furthermore, there is a growing demand for evaluation indices for services that should be provided for uses of the rehabilitation medical instruments. In order to evaluate rehabilitation medical instrument designs in this study, the basic index for design evaluations shall be identified to search for assessment plans. Through this, new evaluation indices will be deduced through discussions and analysis of rehabilitation medical experts, biomedical engineers, and designers. The results of this study are summarized as follows. First, the existing design evaluation indices were collected and analyzed to construct 10 rehabilitation medical instrument design evaluation indices and 44 sub-evaluation items. These will be important evaluation standards for designing rehabilitation medical instruments in the future. Second, the design evaluation indices that must be taken into consideration when developing health care rehabilitation medical instruments are the 10 design evaluation indices of usability, cognition, safety, learning, motility, durability, economic feasibility, space, aesthetics and environmental aspects. Third, design evaluation indices of environment, space, cognition, usability, economic feasibility and aesthetics are indices that must be taken into consideration for product design, while learning, safety, motility and durability are factors that must be given special consideration for rehabilitation medical instrument design evaluation indices. Fourth, if existing product design evaluation indices placed importance on environment, space, cognition, usability, economic feasibility and aesthetics of products for design evaluation indices, rehabilitation medical instrument design evaluation indices placed importance on learning, safety, motility and durability on top of usability and economic feasibility, which are the differences between the design evaluation indices of rehabilitation medical instrument and other product designs. The 10 rehabilitation medical device design evaluation indices and 44 sub-evaluation items were carried out in this study. This research is only on the overall rehabilitation medical device design evaluation indices. In future research, the evaluation indices will be applied in the actual rehabilitation medical design device through production of prototypes, while making revisions and supplementations where necessary.

The Usability Evaluation Half Beam Radiation Treatment Technique on the Esophageal Cancer (식도암 환자에서의 Half Beam 치료법의 유용성 평가)

  • Park, Hochoon;Kim, Youngjae;Jang, Seongjoo
    • Journal of the Korean Society of Radiology
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    • v.9 no.5
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    • pp.287-293
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    • 2015
  • Because of esophageal cancer has the long length of the lesion and also inhomogeneous in depth. So, the radiation dose distribution was inhomogeneous in radiation therapy. To overcomes the dose distribution uniformity using half beam method. Patient's CT image was used radiation treatment planning. We used two planning methods that one is the using normal beam and another is using half beam. Than comparing the two radiotherapy planning using target coverage, dose volume histogram, conformity index, homogeneity index and normal tissues - heart, spinal cord, lung -. In results, Treatment planning using half beam is little more than normal beam in target coverage, dose volume histogram, conformity index, homogeneity index and normal tissues covering. However, If the patient is not correct position patients may arise a side effect. Thus, the using in Half beam involving the geometrically exact under lung cancer is considered to advantage.

Development Process of a Universal Design Evaluation Index with a Case Study for Mobile Phone Evaluation (휴대전화기 평가 사례를 통한 유니버설디자인 평가 도구 개발 프로세스)

  • Kim, Mi-Yeon;Jung, Eui-S.;Park, Sung-Joon
    • Journal of the Ergonomics Society of Korea
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    • v.25 no.4
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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.

Expert Evaluation Method for the Suitability of Universal Design (유니버설 디자인의 적합성에 관한 전문가 평가 방법)

  • Jung, Kwang-Tae
    • Journal of the Ergonomics Society of Korea
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    • v.26 no.4
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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.

Accuracy Analysis of Predicted CODE GIM in the Korean Peninsula

  • Ei-Ju Sim;Kwan-Dong Park;Jae-Young Park;Bong-Gyu Park
    • Journal of Positioning, Navigation, and Timing
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    • v.12 no.4
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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.

WEB-BASED CONSTRUCTION KNOWLEDGE MANAGEMENT PORTAL

  • Youjin Jang;Moonseo Park;Hyun-Soo Lee
    • International conference on construction engineering and project management
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    • 2011.02a
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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.

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