• Journal of the Korean Society of Safety
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• v.34 no.1
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• pp.108-114
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• 2019

Unattended Train operation(UTO) requires higher safety target than other systems, since all train operations are automatic. The system provider to deliver without accident or failure, and the operator to transport passengers without accident by putting all trains supplied, including them, into service. Safety rates without such failures can be represented as indicators of RAMS, among which availability is continuously controllable to achieve the target, with a clear target. Availability is often required by the licensee from the initial stage of the project to demonstrate that the request for proposal (RFP) is usually specified and to maintain separate availability targets at the operational stage. In particular, unlike unmanned operation light rail in complex systems, simple formulas are often presented to facilitate verification at each stage. This paper presents this method of usability calculation in an integrated manner at all levels and analyzes the existing usability values to ensure reliability of the availability formula for integrated use in unmanned light rail systems.

• Journal of The Korean Association of Information Education
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• v.21 no.3
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• pp.361-370
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• 2017

It is in the vortex of the Fourth Industrial Revolution in all areas of our society. Education is no exception. We all know that software is at the center of the education in the 4th industry revolution. It is very important for students to survey the ICT background in order to be good at software education. The OECD PISA has surveyed ICT background of students in a three-year cycle from 2003. This study analyzes PISA ICT statistical data based on the data released in April 2017. We compare and analyze the availability and usability items among the 81 items of the ICT background of the students. The results of linear regression analysis showed that Korea was the lowest among OECD countries. ICT availability is ranked 28 out of 30 countries and ICT usability is ranked 31 out of 31 countries. This reflects the fact that ICT education is not implemented in the country since 2008. For the students who will be the leaders of the future society, ICT education that had implemented in 2000 should be carried out quickly.

• International Journal of Computer Science & Network Security
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• v.23 no.3
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• pp.123-129
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• 2023

The most effective tutoring method is one-on-one, face-to-face in-person human tutoring. However, due to the limited availability of human tutors, computer-based alternatives have been developed. These software based alternatives are called Intelligent Tutoring Systems (ITS) which are used to tutor students in different domains. Although ITS performance is inferior to that of human teachers, the field is growing and has recently become very popular. User interfaces play key role in usability perspective of ITS. Even though ITS research has advanced, the majority of the work has concentrated on learning sciences while mostly disregarding user interfaces. Because of this, the present ITS includes effective learning modules but a less effective interface design. Usability is one approach to gauge a software's performance, while "ease of use" is one way to assess a software's quality. This paper measures the usability effectiveness of an ITS which is designed to teach Object-Oriented (OO) analysis and design concepts using Unified Modeling Language (UML). Computer Supported Usability Questionnaire (CSUQ) survey was conducted for usability evaluation of UML-ITS. According to participants' responses to the system's usability survey, all responses lie between 1 to 3 scale points which indicate that the participants were satisfied and comfortable with most of the system's interface features.

• Culinary science and hospitality research
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• v.23 no.4
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• pp.203-215
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• 2017

The purpose of this study is to investigate the effect of educational service quality on educational satisfaction and job usability. The results of the analysis are as follows. First, based on the theoretical background, factor analysis and reliability analysis were conducted. Five factors of tangibility, responsibility, reactivity, assurance, and empathy were found in the educational service quality. In addition, it was confirmed that there was no problem as a single factor in educational satisfaction and job availability, and these factors showed high reliability and validity. Second, in the relationship between educational service quality and educational satisfaction, all five factors which education service quality factors were found to affect educational satisfaction. The higher the factor of educational service quality, the students will be able to increase their satisfaction with education, which was a degree of satisfaction with the education of contract department. Third, in the effects of educational service quality factors on job availability, tangibility, responsibility, reactivity, and assurance have no effect and empathy affects job availability. In this study, although the factors of education service quality is high except empathy, it is not possible to increase the job availability that leads to successful business results. Fourth, job availability affects educational satisfaction. Therefore, the higher the level of job availability, educational satisfaction will also increase. The following are implications of this study. First, high-quality lectures, hands-on training, and educational programs are needed and values that students pursue must continuously increase. Second, there is a need for measures to improve job availability such as the formation of curriculum related to jobs and the demand for the training courses of restaurants.

• Journal of The Korean Association of Information Education
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• v.22 no.2
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• pp.239-249
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• 2018

Software education will be implemented in elementary schools in Korea since 2019. Although 17 hours of software education is provided, it is necessary for preliminary teachers to have basic ICT skills in training software education. Therefore, it is necessary to objectively compare the basic ICT literacy of preliminary teachers in Korea. This study examines the ICT of preliminary teachers based on the OECD PISA 2015 questionnaires. The contents of the survey compares and analyzes ICT availability and usability items of students. Comparisons are made with students from OECD countries. ICT usability at school was the highest at 2.56, followed by ICT availability at school at 2.4. The third was high at 2.38 for using school works outside the school. Availability outside the school was low at 2.33, and the lowest at school was very low at 1.79. It is necessary for the preliminary teachers to have the ICT ability for the students who will be the protagonists of the future society and the ICT education which can be utilized in each subject in addition to the ICT education in the curriculum of the education college in order to raise the ability.

• Journal of Korean Library and Information Science Society
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• v.45 no.1
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• pp.339-358
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• 2014

This study aims to construct faceted navigation useful for domestic users through analyzing English and North American public libraries' faceted navigations. The 19 domestic libraries and the 12 foreign libraries has been chosen for analyzing their unique facets. Although the domestic libraries' facets had no differences to the domestic universities' facets, the North American libraries have their unique facets. Those facets are target audience, genre, library list, user tags, and availability related facets and the facets are mainly to improve user's usability in using library catalog. Adopting the facets in domestic public libraries by using Fixed-Length data elements of KORMARC, domestic public libraries will enhance usability of library users in retrieving library materials.

• Journal of the Ergonomics Society of Korea
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• v.12 no.1
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• pp.17-24
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• 1993

Today, rapid development and timeliness of introducing a new product be- comes a more influencing factor of determing its competitive power due to a shortened product cycle, while rapid improvement of manufacturing technology makes product design and manufacturing fuse together. This implies that prod- uct usability evaluation and improvement starts right from its design phase, resulting in less development time and cost. To make this possible, proper as- sessment of human reach is one of essential functions for ergonomic product us- ability evaluation, specifically in the platform of computer-aided ergonomic evaluation models or any CAD system with a built-in man model. In this study, an analytic reach prediction algorithm ensuring the posture that human naturally takes, is presented by employing the methods developed for robot kinematics. Among robot kinematic methods for solving the multi-link system, the resolved motion method was found to be effective to solve human reach as a redundant manipulator model. Also, the joint range availability was used as a performance fonction to guarantee human naturalness. The result is expected to be directly applicable to product usability evaluations.

• ETRI Journal
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• v.21 no.4
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• pp.83-93
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• 1999

This paper examines the correlations between user characteristics and their perferences for two selected features of Web-based OPAC systems. User characteristics identified in this study were age, gender, educational status, computer skills and OPAC experience. Usability features included interaction styles, character and image on screen, browsing and navigating style, screen layout, and ease of learning, whereas availability features attended to availability of information, quality of information and up-to-date information. Individual variables and features are described, and the correlation between the variables and the features are explored using Pearson's correlation coefficient(r). Although based on a small-scale sample survey, a considerably large number of statistically significant correlations were found between the users' characteristics and the selected evaluation features of interactive Web-based OPACs. From these observations, it seems to be suitable to recommend that system designers should make a more considered appraisal of the users' demographic characteristics in the design of the new generation of OPAC such as in user-tailored interactive Web-based OPAC systems.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.24 no.3
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• pp.19-25
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• 2016

In this study, we surveyed the Marado status of the availability of emergency runway for the LSA, through site visits. For the future progress Marado flight tour operation, for LSA of 4 models with respect to just in case there was an emergency situation analysis of the availability of emergency runway. We analyzed the problems of the sloping runway with the changing elements for the kinetic and potential energy. The Bingo and CH-650 models of LSA are usability emergency runway of Marado for take-off and landing. But the AT-4 and CTLS models of LSA are limited or impossible to use emergency runway of the Marado.

• Journal of Soil and Groundwater Environment
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• v.28 no.5
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• pp.68-77
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• 2023

The effect of soil damage on the physicochemical characteristics and activity of the soil microbial community is not well known. This study investigates this relationship by analyzing 11 soil samples collected from various points of soil damage across Gyeonggi-do. Soil damage resulted from forest fires, landslides, and development areas, with their impacts most severe on the topsoil layer (0-30 cm). Dehydrogenase and β-glucosidase activities were notably higher at locations damaged by forest fires compared to other sites. While enzyme activities in soils influenced by landslides and development areas were relatively low, sites with a pollution history exhibited elevated dehydrogenase activity, likely due to past microbial response to the pollution. Additionally, an assessment of carbon substrate usability by soil microorganisms indicated higher substrate availability in areas impacted by forest fires, contrasting with lower availability in landslide and development sites. Statistical analysis revealed a positive correlation between organic content of sand and clay and microbial activity. These findings provide valuable insights into soil damage and associated restoration research, as well as management strategies.