• Journal of KIISE
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• v.42 no.10
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• pp.1286-1293
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• 2015

Most e-marketplaces build a reputation system that provides potential buyers with reputation scores of sellers in order for buyers to identify the sellers that are more reliable and trustworthy. The reputation scores are computed based on the aggregation of buyers' ratings. However, when these ratings are used to compute the reputation scores, the existing reputation systems do not make a distinction according to the following two criteria: the capability of the seller and the quality of an item. We claim that a reputation system needs to separate the two criteria in order to provide more precise information about the seller. In this paper, we propose a method to compute seller's reputation by separating the rating into the seller's score and the item's score. The proposed method computes the reputation of the seller's capability by using only the 'seller's score' and helps potential buyers to find reliable sellers who provide fast delivery and better service. In experiments, we propose a simulation strategy that reflects the real life of an E-marketplace and verify the effectiveness of our method by using the generated simulation data.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.584-587
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• 2006

Quality assessment of the building is strongly dependent upon satisfying owner's requirements. To develop indicators for the assessment of design quality, survey on current situation of design process and analysis of Design Quality Indicator(DQI) is performed. The survey revealed that the main cause of frequent design changes is variability feature of owner's requirements. DQI, an indicator developed in UK, questionnaire encompasses questions which are relevant throughout the development stages of a building, and can be used at every key stage of the process. Further research will focus on the development of indicators for the assessment of design quality applicable to Korean market. In addition, research on the visualization method to present assessment results and supporting tools to facilitate assessment will be considered.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.2 no.2
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• pp.49-68
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• 2007

This paper develop self pre-checkup lists for the validity of business model as web business starters can utilize to open business. In particular, self pre-checkup lists invented by Dr. Bruce Merrifield, is reapplied and modified in appropriate to internet shopping mall business. This paper complete many literature reviews to identify appropriate factors of evaluation such as about the characters of internet business, business validity testing theory for internet business model, pros and cons of e-business and startup ventures, factor analysis of technology valuation, and pros and cons for internet shopping mall. This paper define six different factors; scale of sales, the growth rate of market, competitiveness, risk portfolio, industry upside down, and social conditions, as the factors of evaluating the business attractiveness. Meanwhile, it define characters of CEO, content's power, mutual inclusion, commerce, fulfillment, marketing power as the factors of business appropriateness. This paper also conducts several case studies; company I, D, G of applying the former model. This paper sort out internet business model in imaginations by utilizing self pre-checkup lists of business evaluation. Also, the outcomes of evaluation is expected to provide meaningful future business implications.

• Journal of the Korean Institute of Intelligent Systems
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• v.22 no.5
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• pp.624-630
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• 2012

The peer review learning is a method which improves learning outcome of students through feedback between students and the observation and analysis of other students. One of the important problems in a peer review system is to find proper evaluators to each learner considering characteristics of students for improving learning outcomes. Some of peer review systems randomly assign peer review evaluators to learners, or chose evaluators based on limited strategies. However, these systems have a problem that they do not consider various characteristics of learners and evaluators who participate in peer reviews. In this paper, we propose a novel prediction approach of learning outcomes to apply peer review systems considering various characteristics of learners and evaluators. The proposed approach extracts representative attributes from the profiles of students and predicts learning outcomes using various regression models. In order to verify how much outliers affect on the prediction of learning outcomes, we also apply several outlier removal methods to the regression models and compare the predictive performance of learning outcomes. The experiment result says that the SVR model which does not removes outliers shows an error rate of 0.47% on average and has the best predictive performance.

• Journal of vocational education research
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• v.37 no.1
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• pp.55-75
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• 2018

The purpose of this study was to develop the evaluation scales that can access hierarchically the lifelong education field training program based on relevant stakeholders. To fulfill this purpose, both qualitative and quantitative research methods were applied. First of all, four groups of stakeholders were selected such as trainees, professors, field instructors, and program inspectors. The in-depth interviews with 13 experts in the field were conducted, and as a result, the scale with hierarchy of evaluation area, evaluation section, and evaluation item for each stakeholder was developed. In order to verify the content validity of the evaluation scales, delphi surveys for each stakeholder were conducted, using 35 expert panels. After delphi survey, the scale was applied to 90 trainees, 22 professors, and 31 field instructors. SPSS program was used to analyze the descriptive statistics, validity, and reliability. Finally, the evaluation scale of the trainer was identified as 8 evaluation areas, 14 evaluation sections and 51 evaluation items. And the professor's scale consisted of 6 areas, 10 sections and 40 items. The field instructor's scale was determined as 3 areas, 7 sections and 31 items, and the program inspector's evaluation scale was confirmed as 7 areas, 15 sections, and 32 items.

• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.402-411
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• 2019

The purpose of this study is to determine critical assessments and core competencies, and to determine the competence and discipline of self-assessment. We surveyed 511 students who graduated from 12 universities. Self-efficacy 24 items were measured on a 5-point scale, 8 core competencies and 52 detailed competencies were self - assessed from 0 to a maximum of 10 points. The higher the score, the higher the self - evaluation competency level. Statistical analysis was performed using SPSS 20.0 Ver., And a statistical significance level of 0.05 was considered. The self - evaluation competency level was the highest at 6.7 points in the clinical dentistry area, and the lowest at the evidence - based decision area of 5.7 points. Self-regulation was found to be positively related to the self-evaluation core competence level among self-efficacy sub-factors. As the students' self-efficacy affects subjective academic achievement and self-evaluation, it is necessary to develop and apply relevant programs to enhance critical thinking in curriculum, apply problem-based learning method, improve self-efficacy and leadership, It should be possible to cultivate.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.11a
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• pp.419-422
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• 2000

본 논문에서는 길을 기반으로 하여 학습자 스스로 학습의 장면을 결정하고, 학습의 형태를 계획하여 학습을 주도적으로 이끌어 낼 수 있도록 하는 학습자 중심의 자기주도적 학습 환경을 선계 및 구현하였다. 학습 설계 대상은 학습자와 길 사이의 동적 상호작용을 통하여 지필 학습방법으로 학습하기 힘들었던 단원인 고등학교 공통수학의 삼각함수를 선택하였다. 학습자가 학습장면에서 직접 실행해 보고 도형을 이동시켜 변화하는 현상을 관찰하고 탐구함으로써 실시간으로 피드백이 가능하여 학습의 효과를 극대화하였으며 학습자에 대한 정보와 학습의 상태는 DB를 이용하여 관리하도록 하였고 형성평가와 총괄평가는 DB를 이용하도록 설계하였다.

• 한국정보교육학회:학술대회논문집
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• 2004.01a
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• pp.366-374
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• 2004

최근 인터넷과 정보통신 기술의 발달로 웹을 기반으로 하는 교육과 평가에 관한 연구들이 활발히 이루어지고 있다. 그러나 기반 학습에서는 학습자의 다양한 측면과 취향을 고려하지만, 웹 기반 평가 쪽은 학습자의 취향을 고려하지 못했다. 본 연구에서는 학습자의 취향을 고려한 평가 시스템의 인터페이스를 설계하고 구현하고자 하였다. 즉, 익숙한 상태에서 취향에 따라 기존 문제지 유형과 일반적인 평가의 유형을 선택할 수 있으며, 학생들의 인지레벨에 따른 평가의 집중도를 높일 수 있도록 학생의 가독성 및 취향을 고려하고, 평가의 선행적 흐름에서 언제든지 원하는 문항으로 건너뛸 수 있는 융통성을 부여할 수 있는 최대한의 개인적 취향을 고려한 개인별 인터페이스 설계 및 구현에 목적을 두고 있다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.21 no.47
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• pp.25-33
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• 1998

오늘날 인간-컴퓨터 시스템에서 상호작용 하는 컴퓨터 소프트웨어의 사용성에 많은 관심이 집중되고 있으며, 소프트웨어 인간공학 분야에서 이전 연구들은 소프트웨어 사용자 인터페이스들에 대한 사용성 평가의 중요성을 지적하고 있다. 소프트웨어 개발자들, 인터페이스 설계자들 또는 인간공학자들은 개발되는 시스템들이나 인터페이스 디자인들을 평가하는 일에 종종 직면하게 된다. 본 연구는 사용성 기준들과 척도들을 이용하여 사용자 인터페이스 디자인들의 평가를 위한 구조화 모형을 제시한다. 제시된 모형은 선별 단계와 평가 단계로 이루어진 두단계 모형이다. 첫 번째 단계는 정성적인 기준들을 가지고 전문가들의 판단에 근거한 접근방법으로 가능한 인터페이스 대안들을 추려내어 합리적인 부분집합으로 줄이기 위한 단계이다. 두 번째 단계는 정량적인 기준들을 가지고 실 사용자에 근거한 접근 방법으로 객관적인 척도들을 가지고 첫 단계에서 제시된 대안들의 부분집합을 평가하는 것이다. 제안된 방법이 정보분석을 위한 데이터 베이스 시스템의 인터페이스 설계에 적용되었다. 본 연구에서 제안된 모형은 실제 평가자들에게 사용성 기준들과 척도들에 근거해서 최선의 인터페이스를 선정할 수 있는 구조화된 접근방법을 제시한다.

• Review of KIISC
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• v.3 no.4
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• pp.38-49
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• 1993

미국은 안전한 시스템에 대한 평가를 위하여 TCSEC(Trusted Computer System Evaluation Criteria)을 1985년에 발표하였고, 이는 안전한 시스템의 구매자, 개발자, 평가자 들에 의해 사용되었다. 그러나 TCSEC의 적용 경험에서 발견된 문제점의 보완, 상용의 보안 정책의 수용, 각국평가 기준서들과의 상호 연동성 등의 고려 등 새로운 요구조건들이 제기됨에 따라 NIST 와 NSA 가 TCSEC 을 대치할 새로운 보안 평가기준서를 제작하기 위한 공동의 프로젝트를 수행하게 되었고 1993년FC(Federal C riteria)의 첫번째 작업 초안을 발표하였다. 본 고에서는 FC의 추진동기, 목적, 구성의 특징 등을 분석하고 현재 시도되고 있는 국제 보안평가 기준서의 작성동향등을 파악함으로써 국내 보안평가 기준서 작성 필요성과 작성시 피요한 사항들을 검토하였다.