• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.295-305
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• 2022

This study aimed to present a realistic policy direction to reduce human rights violations by analyzing the mechanisms of its factors affecting the experience of human rights violations for middle and high school student athletes. The method analyzed the response data of 13,205 student athletes through a structured questionnaire using logistic regression analysis. The independent variable consisted of sexual violence, sexual shame, physical violence, verbal violence, bullying, invasion of privacy and learning rights, and unfair leaders' actions related to exercise. As a result of the analysis, first, the team atmosphere, human rights consciousness in their sports and in the sports field were found to have a significant influence on physical and language violence, bullying, privacy and infringement of learning rights. Second, for the experience of sexual violence, the team atmosphere and the level of awareness of human rights violations in the sports community had a significant effect, but the permission of violence in the sports community and human rights consciousness in their sports did not appear as meaningful variables. Third, it was found that the unfair experience related to exercise had a significant effect on the team atmosphere, the overall level of violence in the sports community, and the its awareness of human rights violations in the sports community.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.12
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• pp.795-806
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• 2017

In this paper, we propose a user experience evaluation method for virtual reality living space contents and apply it to prototype simulations to measure user experience. The user evaluation method proposed in this paper is based on the existing user evaluation methodology, but it is established by changing the experience and evaluation factors to match the characteristics of the virtual reality living space. The generated virtual reality living space simulation is configured similar to real space and is placed real objects that the user actually uses in each space, so that users can feel reality. The subjects performed the tasks according to the given scenarios and then evaluated the simulation. As a result of the evaluation, the main goal of the simulation, the items that make the users feel realistic, were lower than our expectations. This means that future simulations need to be modified in a way that adds or expands elements that enhance the realism. In this way, the UX evaluation method proposed in this paper is expected to provide a more objective indicator to the content developer or designer in order to grasp the user's demand in the virtual reality living space.

• Journal of computational fluids engineering
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• v.19 no.3
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• pp.1-7
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• 2014

One of the most important factors in sailing yacht design is an accurate velocity prediction. Velocity prediction programs (VPPs) are widely used to predict velocity of sailing yachts. VPPs, which are primarily based on experimental data and experience of long years, suffer limitations applied in realistic conditions. Thus, in the present study, a high fidelity velocity prediction method using the computational fluid dynamics (CFD) is proposed. Using the developed method, velocity and motion of a 30 feet sloop yacht, which was developed by Korea Research Institute of Ship and Ocean (KRISO) and termed KORDY30, were predicted in upwind sailing condition.

• East Asian mathematical journal
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• v.30 no.2
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• pp.149-172
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• 2014

The problems of optimization addressed in the high school curriculum are usually posed in real-life contexts. However, because of the instructional purposes, problems are artificially constructed to suit computation, rather than to reflect real-life problems. Those problems have thus limited use for teaching 'practicalities', which is one of the goals of mathematics education. This study, by utilizing 'GeoGebra', suggests the optimization problem solving related to the quadratic curve, using the contour-line method which contemplates the quadratic curve changes successively. By considering more realistic situations to supplement the limit which deals only with numerical and algebraic approach, this attempt will help students to be aware of the usefulness of mathematics, and to develop interests in mathematics, as well as foster students' integrated thinking abilities across units. And this allows students to experience a variety of math.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.7-12
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• 2011

Because development of high speed network, spread of internet, and high quality of computer performance, request and internet about massive multiplayer playing the game, is increasing. In order to experience realistic game play which is one of the most importance factor in massive multiplayer on-line, synchronization is importance matter. We propose synchronized and optimized scheme that combined FSM (Finite State Machine) and event holding method for efficient state synchronization for massive multiplayer on-line, and we show the effectiveness and reliability of our proposed scheme through the implementing and testing of the game server applying on our proposed scheme.

• Journal of Korean Academy of Nursing
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• v.45 no.4
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• pp.513-522
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• 2015

Purpose: The purpose of this study was to identify and understand nurses' experiences of the death of patients in geriatric hospitals. Methods: Van Manen's hermeneutic phenomenological analysis was applied in the interpretation of experiential descriptions of seven nurses who had experienced the death of patients in a geriatric hospital. Results: The essential subjects derived from the experience of the nurses on the death of patients in a geriatric hospital are covered in the following 7 themes. 'Placed in death site', 'Difficult repetition of death and farewell', 'Emotional waves that rushes in after farewell', 'Dilemmas in a place with no preparation to greet expected death', 'Getting dull from continually being struck with sorrow', 'Being together with living death', and 'Showing courtesy for a good farewell and living well'. Conclusion: The results of this research will contribute to the development of policy on all the deaths of patients in geriatric hospitals and suggest basic data that need to be applied in real practice and directions to introduce plans for realistic improvements in nursing care of deathbed patients in geriatric hospitals.

• Journal of Communications and Networks
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• v.16 no.1
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• pp.10-17
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• 2014

This work investigates two important performance metrics of underlay cooperative cognitive radio (CR) networks: Interference cumulative distribution function of licensed users and outage probability of unlicensed users. These metrics are thoroughly analyzed in realistic operating conditions such as imperfect fading channel information and strict transmit power constraint, which satisfies interference power constraint and maximum transmit power constraint, over Nakagami-m fading channels. Novel closed-form expressions are derived and subsequently validated extensively through comparisons with respective results from computer simulations. The proposed expressions are rather long but straightforward to handle both analytically and numerically since they are expressed in terms of well known built-in functions. In addition, the offered results provide the following technical insights: i) Channel information imperfection degrades considerably the performance of both unlicensed network in terms of OP and licensed network in terms of interference levels; ii) underlay cooperative CR networks experience the outage saturation phenomenon; iii) the probability that the interference power constraint is satisfied is relatively low and depends significantly on the corresponding fading severity conditions as well as the channel estimation quality; iv) there exists a critical performance trade-off between unlicensed and licensed networks.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.10
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• pp.4865-4886
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• 2017

The user experience of practical indoor power line communication (PLC) applications is greatly affected by the system quality-of-service (QoS) criteria. With a general broadcast-and-multi-access (BMA) relay scheme, in this work we investigate the joint source and relay power optimization of the amplify-and-forward (AF) relay systems used under indoor broad-band PLC environments. To achieve both time diversity and spatial diversity from the relay-involved PLC channel, which is time-varying in nature, the source node has been configured to transmit an identical message twice in the first and second signalling phase, respectively. The QoS constrained power allocation problem is not convex, which makes the global optimal solution is computationally intractable. To solve this problem, an alternating optimization (AO) method has been adopted and decomposes this problem into three convex/quasi-convex sub-problems. Simulation results show the fast convergence and short delay of the proposed algorithm under realistic relay-involved PLC channels. Compared with the two-hop and broadcast-and-forward (BF) relay systems, the proposed general relay system meets the same QoS requirement with less network power assumption.

• Korean Journal of Psychosomatic Medicine
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• v.4 no.2
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• pp.163-169
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• 1996

The authors examined for risk factors for suicide among psychiatric patients who had committed suicide through the analysis of demographic, clinical and psychological characteristics of the patients. The total number of suicides committed during social adjustment period was 9. Male and female ratio was 5:4 and the highest incidence occurred in the age group of 21-29 years. Of the 9 cases, schizophrenia accounted for two-third of the suicides. Among the committed suicides, 4 were in hospitalization and rest were postdischarge state. We found that 4 of 5(80%) suicides occurred in the first year after discharge, and that three fifth(60%) occurred within three months of discharge. In this result, most of suicides occurred immediately or soon after discharge and some during inpatient care. The major precipitating factors the patients showed before committing suicide were realistic and psychological problems. Consquently, they become dejected, experience feelings of hopelessness, go on to a depressed mood, and, in that case, have suicidal ideas that are eventually acted on. We believe that the ability to recognize risk factors for suicide and develop appropriate interventions is key to suicide prevention.

• Journal of Korea Game Society
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• v.10 no.2
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• pp.57-66
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• 2010

In the prior works on tabletop systems, a projection-based tabletop surface is mostly used to display computer images, and the participants interact with the display surface by hand multi-touching or using some tangible objects. In this research, however, we developed the FishBowl game that employs a scalable tabletop tiled display with infrared camera tracking coupled with PDA mobile interfaces. The focus of this game is to enhance user interactivity and realistic experience by coupling the high-resolution tabletop virtual environment and PDA mobile interface. This paper describes the game design followed by the system design and its detailed implementations. It also discusses the system usability and recommendation for its improvements after interviewing game players and then concludes with future research directions.