• 재활복지공학회논문지
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• 제9권1호
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• pp.53-60
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• 2015

본 논문은 시각장애인용 보조공학기기인 스크린리더용 음성합성기의 장기 및 단기 사용성 평가에 대한 것이다. 총 20명의 시각장애인이 단기 사용성 평가에 참가하였고, 그 중 10명이 장기 사용성 평가에도 참여하였다. Mean Opinion Score(MOS)를 통해 합성음 음색의 자연성과 명료성 등을 살펴보았고, 순위조사를 통해 음색의 선호도를 조사하였으며, 자유 피드백을 통하여 사용자의 만족도와 기타 요구사항 등을 평가하였다. 또한 장기 사용성 평가를 통해 합성음의 장시간 청취 시 자연성, 명료성, 선호도, 귀의 피로도 등을 조사하여 단기 사용성 평가결과와 비교분석하였다.

• 한국CDE학회논문집
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• 제12권1호
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• pp.15-26
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• 2007

We have developed a method that enables a user to better understand and enjoy the contents of 3D digital archives, thereby enhancing the user's experience. The system's interactive interface, built using virtual reality technology, enables the user to "walk through" the archives, comparing two or the same content at different points in time. For example, a user can compare the proposed design for a building with the actual building and can compare the states of restoration of a cultural heritage site over time. This ability to perform multilateral comparisons enables the user to clarify the relationship between contents, the influence of one content on another, and the causal relationship between contents. Testing of a prototype system for a 3D digital archive of cultural heritage sites showed that it worked smoothly and that the users could easily operate the navigation system.

• Asia pacific journal of information systems
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• 제15권4호
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• pp.27-60
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• 2005

The purpose of this study is to call attention to the consensus of stakeholders of corporate e-Learning system for the sake of its success. We identified the critical success factors(contents, technical features, management, and organizational support) as major components of corporate e-Learning systems and questioned whether stakeholders' consensus on the importance of these components facilitates the successful implementation of these components. We also questioned whether the influence of these components on user satisfaction could be moderated by contextual factors. Based on empirical testing of 18 e-Learning user companies, we verified that the consensus of stakeholders regarding the importance of content, technological features, and organizational support has a positive influence on the perceived quality of these factors in their e-Learning systems, which in turn is positively related to user satisfaction. The learning subjects and learning style did significantly moderate the influences of these perceived qualities on user satisfaction.

• 대한인간공학회지
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• 제22권3호
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• pp.93-111
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• 2003

This research extends a general theory of cognition to address cognitive constraints on complex command production and allows us to make system design recommendations. The research described in this paper addresses the cognitive origins of problems user have producing sequence-dependent command strings while interacting with the UNIX operating system. We describe an empirical and theoretical analysis of user difficulties, and then show how our analyses lead to design recommendations. In addition, we summarize results from testing the impact of our design recommendations on system usability

• Journal of Information Processing Systems
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• 제19권2호
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• pp.219-231
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• 2023

Intelligent applications are crucial for increasing the popularity of shared urban electric bicycles (EBs). Building an application platform architectural system that can satisfy independent user operations is critical for increasing the intelligent usage of shared EBs. Consequently, we collected online reviews of shared EB applications, conducted semantic processing and sentiment analysis, and refined the positive and negative review data for each function. The positive and negative review indices of each function were calculated using the formulae for positive and negative review indices of product functions, thereby determining the functions that need to be improved. Each function of the Shared EB application was improved according to its business process. The main contributions of this study are to build a user requirement architecture system for the Shared EB application with five dimensions and 22 functions using the Delphi method to design the user interface (UI) of this application based on user satisfaction evaluation results; to create a high-fidelity dynamic interaction prototype and compare user satisfaction before and after improving the Shared EB application functions. The testing results indicate that the changes in the UI significantly improve the user experience satisfaction of the urban Shared EB application, with the positive experience index increasing by 69.21% and the negative experience index decreasing by 75.85% overall. This information can be directly used by relevant companies to improve the functions of the Shared EB application.

• 비파괴검사학회지
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• 제19권4호
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• pp.294-299
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• 1999

본 논문에서는 로타(rotor)의 초음파 탐상 결과의 신뢰성을 향상시키기 위하여 수직탐촉자에 대한 교정시스템을 개발하였다. 본 시스템은 신호처리부 (오실로스코프, 스펙트럼 분석기, 송/수신기), 표준시험편 프로그램으로 구성되어 있으며, 교정을 위한 신호처리는 높은 정밀도로 빠르게 수행할 수 있도록 구성되어 있다. 개발된 시스템을 이용하여 로타 검사에 사용되고 있는 초음파 탐촉자를 교정하고 있으며, 신뢰성 있는 정밀도와 감도를 얻을 수 있었다.

• 대한산업공학회지
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• 제33권4호
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• pp.487-493
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• 2007

In this paper, we deal with an optimal software-release problem of determining the time to stop testing and release the software system to the user. The optimal release time problem is considered from maintenance like the periodic distribution of service packs and the unpredictable distribution of patches after the release. Moreover, the environment of software error-detection during operation differs from the environment during testing. This paper proposes the software reliability growth model which incorporates periodic service packs, unpredictable patches and operational environment. Based on the proposed model, we derive optimal release time to minimize total cost composed of fixing an error, testing and maintenance. Using numerical examples, optimal release time is determined and illustrated.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 추계학술대회논문집A
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• pp.206-211
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• 2000

The accelerated testing technique using the equivalent load condition plays an important part in development process. However, in the industrial field, the theoretical background and advantages of this accelerated testing technique have been lack of understanding. Because the environmental durability condition forms the foundation of the accelerated testing technique, it is important to analyze the loading components and damage in service environment. In this work, we present the theoretical background and process for accelerated testing, and introduce our accelerated equivalent load analysis program. We developed the GUI program, and the user can easily obtain the result by selecting the program module.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 D
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• pp.2319-2321
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• 2002

This paper suggests a computer-based on-line measurement method of tan$\delta$ and capacitance for HV capacitor. The method employs V-I technique using scaled down analog voltage and current signal obtained by digital oscilloscope. The measurement results are displayed by graphic user interface with graphic language. Field tests were tarried out at 6.6kV testing voltage in Samhwa Capacitor company.

• 컴퓨터교육학회논문지
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• 제4권2호
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• pp.125-133
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• 2001

컴퓨터 공학의 발달 및 검사이론의 발전으로 검사를 제작하거나 실시하는데 컴퓨터를 이용하는 많은 새로운 기법들이 연구 개발되고 있으며, 최근에는 인터넷과 정보통신 기술의 발달로 웹을 기반으로 하는 평가에 관한 연구가 활발히 진행되고 있다. 그러나 이러한 기술적 측면의 발달에 비해 학습자에게 편안한 평가 환경을 제공할 수 있는 사용자 가독성에 관한 연구가 부족하였다. 웹기반의 평가에서 사용한 가독성은 수험자들의 시험 불안을 감소시키며, 정확한 능력 측정을 위해 매우 중요한 요소가 된다. 본 연구에서 우리는 웹 기반 학습 인터페이스에 관한 연구와 초등학생들을 대상으로 한 설문을 통해 최적의 웹 평가 인터페이스를 제공하고자 하였다. 본 연구를 통해 제안 된 원리들은 앞으로 웹 평가 화면을 제작하는데 많은 도움이 되리라 생각한다. 더불어 본 논문에서 제안한 원리 이외에도 개별적인 문항 제작과 지시문, 멀티미디어 요소의 레이아웃 등 좀 더 다양한 분야에 관한 연구가 수행되어야 할 것이다.