• 한국IT서비스학회지
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• 제10권2호
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• pp.259-269
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• 2011

The B$\'{e}$k$\'{e}$sy audiometer is used to determine not only hearing threshold but also assumption of recruit phenomenon and cause of disease. However, current B$\'{e}$k$\'{e}$sy audiometer takes an operational model, so called face-to-face model, in which model one audiometrist can assess only one subject at a time. As a result, the face-to-face model leads to high audiometrist's labor cost and long waiting time when there exist many subjects. To improve such weakness, this paper extends PC based B$\'{e}$k$\'{e}$sy audiometer to support client/server model in which model one audiometrist enables to concurrently access several subjects. As providing capabilities such as real-time transfer of assessment result, video monitoring of subject and video chat, the same effect as face-to-face model but overcomes weakness of face-to-face model.

• 한국콘텐츠학회논문지
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• 제5권4호
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• pp.254-264
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• 2005

본 논문에서는 기존의 문제점들을 극복하기 위한 개선된 E-Model을 제안하였다. 새로운 모델은 버스트 패킷손실과 최신효과를 적용하여 VoIP 품질 측정의 정확도를 높일 수 있다. 개선된 E-Model은 길버트 모델에 의해 생성된 버스트 패킷 손실에 따라 NR(Network R) 값과 UR(User R) 값을 측정한다. 기존 모델들인 MOS, PESQ, E-Model과 비교하여 시뮬레이션을 수행하였으며, 실험 결과 개선된 E-Model이 기존 모델들보다 정확하고 신뢰성 있음이 증명되었다.

• 통상정보연구
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• 제7권4호
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• pp.117-134
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• 2005

B2B transaction was expected to dominate in the global market and thus many e-marketplaces have been built since 1999 in Korea. However, only a few e-marketplaces are thriving and the future of B2B e-marketplaces except MRO area seem to be uncertain. This paper explores why B2B transactions only in MRO area are rapidly increasing and examines the competing structure and business models of MRO e-marketplace. Business models of MRO e-marketplaces are various among different countries. However, they can be classified as three business models:information portal model, purchasing agent model, open market model. It is not easy to answer which business model is most competitive because each models have their own advantages and functions. Information portal model can be easily applied for the e-marketplace which operates off-line enterprises. Purchasing agent model is favorable to the e-marketplaces which has already obtained buyers and sellers. Open market model is desirable to the e-marketplace which has excess to global market.

• 한국정보시스템학회지:정보시스템연구
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• 제28권3호
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• pp.203-225
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• 2019

Purpose The purpose of this study is to empirically verify an ePortfolio success model which shows the structural causal relationships among the basic modeling constructs. We developed the success model based on DeLone and Mclean(2003) from IS perspective and on Balaban et al(2013) from ePortfolio perspective. And we are focused on the success of ePortfolio system designed for college students and professors. Design/methodology/approach Structural equation modeling techniques were applied to data collected 375 users of the ePortfolio system, K-Folio, at least one semester during one academic year. The structural model was analyzed using a Lisrel 8.54 statistical program. Findings The followings are the findings of the study. First, the constructs of IS success model are well applied to ePortfolio for college education. Second, the proposed model which has direct causal relationships from ePortfolio's quality to performance is more significant than the D&M and Balaban's model(2013). Third, the information quality among ePortfolio quality constructs does not have effect on system usability and performance. It means that information contents' quality issued by professor or system manager is not satisfied with the students yet. Finally, by using indirect analysis of structural equation model, we found that the ePortfolio operation manager should focus on ensuring system maintenance activities and providing fast and accurate services for improving ePortfolio performance.

• 통상정보연구
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• 제6권1호
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• pp.129-153
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• 2004

In order to succeed in e-Trade Project in Korea, the related parties endeavor to introduce the e-title registry model such as Bolero model(Title Registry Model) and TEDI model (Repository Service Provider Model). Prior to mentioning the Model of e-Title Registry, desirable Global e-Trade Platform is the platform connecting Global e-Trade Platforms in each country and Bolero's Core Messaging Platform and e-Title Registry must be established in each country. Each e-Title Registry must be connected with another registry. Like Korea, Recognized Electronic Document Repository must be established as proxy for preserving, attesting, carrying out sending and receiving electronic document to prevent from disputes between parties and to carry out notarizing electronic documents and related transaction. The purpose of this paper is to promote the introduction of e-Title Registry in the e-Trade and to streamline the procedures of the electronic bill of lading.

• 통상정보연구
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• 제8권2호
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• pp.119-139
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• 2006

The purpose of this research is to analyze four models of global e-trade implementation which was suggested at the advance research of implementation global e-Trade with major trading countries. The main outcomes of this empirical study are as follows. For realizing global e-trade of G-Networking model country we have to implement e-trade in the field of "import & logistics". And for realizing global e-trade of P-Networking model country, it need to try in "settlement & clearance". Furthermore, for realizing global e-Trade of G-Penetration model country, we have known that the field of "import & logistics" would be implemented. Finally for realizing global e-Trade of P-Penetration model country, "settlement & clearance" could be implemented. Also, this study suggests that we have to do negotiation with China and Japan at first, and to try the area of settlement & clearance to implement the global e-Trade with Korea's 10 major trading countries.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권11호
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• pp.2121-2142
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• 2011

In this paper, we propose an e-Learning process control model that aims to graphically describe and automatically generate the manifest of sequencing prerequisites in packaging SCORM's content aggregation models. In specifying the e-Learning activity sequencing, SCORM provides the concept of sequencing prerequisites to be manifested on each e-Learning activity of the corresponding tree-structured content organization model. However, the course developer is required to completely understand the SCORM's complicated sequencing prerequisites and other extensions. So, it is necessary to achieve an efficient way of packaging for the e-Learning content organization models. The e-Learning process control model proposed in this paper ought to be an impeccable solution for this problem. Consequently, this paper aims to realize a new concept of process-driven e-Learning content aggregating approach supporting the e-Learning process control model and to implement its e-Learning process modeling system graphically describing and automatically generating the SCORM's sequencing prerequisites. Eventually, the proposed model becomes a theoretical basis for implementing a SCORM-based e-Learning process management system satisfying the SCORM's sequencing prerequisite specifications. We strongly believe that the e-Learning process control model and its modeling system achieve convenient packaging in SCORM's content organization models and in implementing an e-Learning management system as well.

• 한국과학교육학회지
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• 제28권6호
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• pp.527-545
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• 2008

본 연구는 과학교육에서 학습동기 요소를 활용한 4E&E순환학습모형을 제안하고자 하였다. 본 모형은 동기설계와 수업설계를 기반으로 하고 있다. 4E&E순환학습모형은 유인(Engage), 탐색(Exlpore), 설명(Explain), 확장(Expand) 등의 4단계로 구성되어 있으며, 각 단계마다 평가(Evaluate)와 feed-back을 통해 순환적으로 진행된다. 그리고 4E&E순환학습 모형은 수업과정 중에 평가와 피드백을 통한 지속적으로 학습에 대한 점검이 이루어지는 특징을 갖고 있어 효과적으로 학습 목표에 도달할 수 있다. 특히, 4E&E순환학습 모형은 학습동기유발전략을 활용하여 수업을 설계하고 실시함으로써 수업에 대한 매력도를 높이고 학습에 집중할 수 있어 과학교육에서 매우 효과적인 모형이라 할 수 있다.

• KSTLE International Journal
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• 제6권1호
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• pp.1-7
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• 2005

Wear model for predicting the vehaviour of a depth is considered in this paper. It is deduced from the energy and volume based wear models such as the Archard equation and the workrate model. A new parameter of the equivalent depth ($D_e$= wear volume /worn area) is considered for the wear model of a depth prediction. A concenpt of a dissipated shear energy density is accommodated for in the suggested models. It is found that $D_e$ can distinguish the worn area shape. A cubic of $D_e$($D_e^3$) gives a better linear regression with the volume than that of the maximmum depth $D_{max}e$($D_{max}^3$) does. Both $D_{max}$ and $D_e$ are used for the presently suggested depth-based wear model. As a result, a wear depth profile can be simulated by a model using $D_{max}$. Wear resistance from the concern of an overall depth can be identified by the wear coefficient of the model using $D_e$.

• 한국컴퓨터정보학회논문지
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• 제10권3호
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• pp.275-286
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• 2005

IT(Information Technology)가 비즈니스 업무에 도입 구축된 이래, 기업의 비즈니스 모델에 대한 관심사는 지속적으로 커지고 있다. 기업은 수익을 창출할 것으로 예상되는 비즈니스 모델을 만들기 위한 노력을 경주하고 있으나 그 비즈니스 모델이 성공을 한다고 보장할 수는 없다. 신 기술의 라이프사이클이 짧아지는 상황에서, 당시에 출현한 기술의 우수성 판단만으로는 그 기술을 기반으로 한 비즈니스 모델이 수익을 창출할 것이라고 보장할 수는 없다. 이에, Timmers 모델, Julta 등의 비즈니스 모델, Rappa 모델, 전자상거래 수익모델, B2E 모델과 제휴, 제휴(Affiliated) B2E 비즈니스 프레임에 대한 모델을 분석한 후, 이들 모델의 장단점을 제시하고자 한다. 또한 기술평가와 비즈니스 모델간 관련성에 대한 분석을 한 후, 모바일 솔루션 기업들이 시장에서 성공하기 위한 Comraded B2E 비즈니스 모델을 도출하고자 한다.