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Masan, South Korea

Kyungnam University is a private university located in Changwon , the capital city of Gyeongsangnam-do, South Gyeongsang or Gyeongnam province, in Southeastern South Korea. Kyungnam University has six colleges . Its 15 research institutions work to facilitate not only individual research but also cooperative partnership activities with academia, industry, and government. The university also has 65 sister universities in 19 different countries. The university sees itself as a model regional university of the 21st century, with specialization in globalization and localization under the university's motto of 'truth, freedom, and creation'. With the university motto as its guideline, its educational goal is to produce well-educated professionals, community leaders and true world citizens by guiding students in their discovery and formation of ideas about humanity, nature, society, culture, and scientific theory and its application. Wikipedia.

Park D.-S.,Konyang University | Lee G.,Kyungnam University
Journal of NeuroEngineering and Rehabilitation | Year: 2014

Background: A balance test provides important information such as the standard to judge an individual's functional recovery or make the prediction of falls. The development of a tool for a balance test that is inexpensive and widely available is needed, especially in clinical settings. The Wii Balance Board (WBB) is designed to test balance, but there is little software used in balance tests, and there are few studies on reliability and validity. Thus, we developed a balance assessment software using the Nintendo Wii Balance Board, investigated its reliability and validity, and compared it with a laboratory-grade force platform. Methods. Twenty healthy adults participated in our study. The participants participated in the test for inter-rater reliability, intra-rater reliability, and concurrent validity. The tests were performed with balance assessment software using the Nintendo Wii balance board and a laboratory-grade force platform. Data such as Center of Pressure (COP) path length and COP velocity were acquired from the assessment systems. The inter-rater reliability, the intra-rater reliability, and concurrent validity were analyzed by an intraclass correlation coefficient (ICC) value and a standard error of measurement (SEM). Results: The inter-rater reliability (ICC: 0.89-0.79, SEM in path length: 7.14-1.90, SEM in velocity: 0.74-0.07), intra-rater reliability (ICC: 0.92-0.70, SEM in path length: 7.59-2.04, SEM in velocity: 0.80-0.07), and concurrent validity (ICC: 0.87-0.73, SEM in path length: 5.94-0.32, SEM in velocity: 0.62-0.08) were high in terms of COP path length and COP velocity. Conclusion: The balance assessment software incorporating the Nintendo Wii balance board was used in our study and was found to be a reliable assessment device. In clinical settings, the device can be remarkably inexpensive, portable, and convenient for the balance assessment. © 2014 Park and Lee; licensee BioMed Central Ltd. Source

Park D.,Kyungnam University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2014

Similar to the three-qubit Greenberger-Horne-Zeilinger (GHZ) symmetry we explore the four-qubit GHZ symmetry group and its subgroup, the restricted GHZ symmetry group. While the set of symmetric states under the whole group transformation is represented by three real parameters, the set of symmetric states under the subgroup transformation is represented by two real parameters. After comparing the symmetric states for whole group and subgroup, the entanglement is examined for the latter set. It is shown that the set has only two stochastic local operations and classical communication classes, Labc2 and Gabcd. Extension to the multiqubit system is briefly discussed. © 2014 American Physical Society. Source

Sin H.,Inje Institute of Advanced Studies | Lee G.,Kyungnam University
American Journal of Physical Medicine and Rehabilitation | Year: 2013

OBJECTIVE: The aim of this study was to investigate the effects of additional virtual reality training using Xbox Kinect on upper extremity function, including range of motion, motor function, and gross manual dexterity, in stroke survivors with hemiplegia. DESIGN: This study is a randomized controlled trial. Forty participants were randomly allocated to either the experimental or control groups; the experimental group (n = 20) underwent virtual reality training using Xbox Kinect and conventional occupational therapy, and the control group (n = 20) underwent conventional occupational therapy alone. The mean time since the onset of stroke was 7.22 mos in the experimental group and 8.47 mos in the control group. At baseline and after 6 wks of intervention, range of motion of the upper extremity was measured, and the Fugl-Meyer Assessment and the Box and Block Test were performed. RESULTS: After intervention, significant improvements from baseline values in range of motion of the upper extremity, Fugl-Meyer Assessment scores, and Box and Block Test scores were observed in the experimental and control groups (P < 0.05). At follow-up, there were significant differences between the two groups in range of motion (except for the wrist), Fugl-Meyer Assessment scores, and Box and Block Test scores (P < 0.05). CONCLUSIONS: The hemiplegic stroke survivors who received additional virtual reality training using Xbox Kinect showed significantly improved function of the upper extremity. However, the effects of the virtual reality training using Xbox Kinect may have been a result of the greater total intervention time in the training group compared with the control group. Thus, the potential efficacy of Xbox Kinect in the rehabilitation of post-stroke survivors needs to be investigated in greater depth. Copyright © 2013 by Lippincott Williams & Wilkins. Source

Na U.J.,Kyungnam University
International Journal of Precision Engineering and Manufacturing | Year: 2012

A typical magnetic bearing system is composed of two radial magnetic bearings and an axial magnetic bearing. The axial magnetic bearing with a large axial disk usually limits rotor dynamic performance and makes assembling and disassembling difficult for maintenance work. This paper proposes a novel permanent magnet biased integrated radial-axial magnetic bearing without axial disk. The axial magnetic bearing unit in this integrated magnetic bearing utilizes reluctance forces such that the axial disk can be removed from the bearing unit. The 4-pole homopolar type radial magnetic bearing unit is also designed and analyzed. 3-D flux analysis is provided to illustrate the novel diskless integrated magnetic bearing. © KSPE and Springer 2012. Source

Lee S.,Kyungnam University
Educational Technology and Society | Year: 2013

The purpose of this study is to search for any difference in self-expression of Second Life residents with different levels of shyness. For this purpose, we used sixty students from two fifth-grade elementary school classes. Thirty students were assigned to the high shyness group and the rest to the low shyness group. Each group completed pre- and post- self-expression tests. After six weeks of speaking activities in Second Life, the results indicate that self-expression scores increased for students in both the high and the low shyness groups. The low shyness group showed an increase by 1.00 in the self-expression score. However, the high shyness group showed an increase by 3.14 after the speaking activities. This result suggests that Second Life can be a good environment to enhance self-expression in students, especially those with degrees of high shyness. © International Forum of Educational Technology & Society (IFETS). Source

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