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Neietsu, South Korea

Bae J.M.,Armed Forces Ildong Hospital | Ha B.,Armed Forces Ildong Hospital | Lee H.,Armed Forces Yangju Hospital | Park C.K.,Armed Forces Goyang Hospital | And 2 more authors.
Journal of Korean Medical Science | Year: 2012

This study was conducted to clarify the prevalence of common skin diseases and their associated factors among military personnel in Korea. Four dermatologists visited adjacent military units and examined soldiers. A structured questionnaire that included questions about known skin diseases, demographic information, and questions for the Perceived Stress Index was completed for each participant. The soldiers that had been diagnosed with a skin disease answered one additional questionnaire (Skindex-29) which assess the influence of an individual's skin disease on daily life. Of 1,321 soldiers examined, 798 (60.4%) had one or more skin diseases. The three most common skin problems were acne (35.6%), tinea pedis (15.2%) and atopic dermatitis (5.1%). The diseases closely related to the period of military service were acne, tinea pedis, viral warts and corns. The diseases related to the amount of stress were atopic dermatitis, seborrheic dermatitis, and acne. The most troublesome skin diseases were atopic dermatitis, tinea cruris, and seborrheic dermatitis. These results demonstrated that the prevalence of skin disease among military personnel in Korea is very high, and that some of the skin disorders may have a significant influence on their daily lives. © 2012 The Korean Academy of Medical Sciences. Source

Ma J.,Korea Army Academy | Kim N.,Ulsan National Institute of Science and Technology | Rothrock L.,Pennsylvania State University
Simulation Modelling Practice and Theory | Year: 2011

In this paper, a new performance assessment methodology for human-in-the-loop call center systems at the level of customer-agent interactions (CAI) is proposed. We develop a team-in-the-loop simulation test bed, to analyze CAI-level performance of a service system using a temporal performance measure with time windows. The proposed framework should allow researchers to collect and analyze individual as well as team performance at a finer granularity than current call center efforts which focus on queue-centered analysis. The software framework is object-oriented and has been designed to be configurable. A sample simulation study in different scenarios is illustrated to provide the usages and advantages of the proposed method with index of Interactive Service Performance. © 2010 Elsevier B.V. All rights reserved. Source

Kim D.,Korea Army Academy | Choi J.,Kyung Hee University
Journal of Physics Condensed Matter | Year: 2010

The photo-response of a freestanding constricted polymeric solid-state bridge of water soluble sodium poly[2-(3-thienyl)-ethoxy-4-butylsulfonate] (SPTEBS) was studied as a function of water vapor pressure. The dark current dramatically increases with water vapor pressure higher than 12Torr. Surprisingly, under light illumination, the short-circuit current of the polymeric solid-state bridge decreases with increasing water vapor pressure so that, above 12Torr of water vapor pressure, the short-circuit current under the light illumination is even lower than the dark current. This negative photo-response of the polymeric solid-state bridge is attributed to the self-doping by hydration of the polymer and the de-doping, possibly the result of photo-induced desorption of adsorbed water molecules. © 2010 IOP Publishing Ltd. Source

Lee C.,Ulsan National Institute of Science and Technology | Son C.,Korea Army Academy | Yoon B.,Dongguk University | Park Y.,Seoul National University
International Journal of Mobile Communications | Year: 2013

This study proposes a systematic approach to discovering new mobile service opportunities from related documents to overcome the weaknesses of previous methods based on the judgements of experts. At the heart of the suggested approach is text mining to explicitly specify the meanings of documents and information visualisation to effectively explore critical implications. Specifically, we integrate the strengths of Principal Component Analysis (PCA) for mapping multi-dimensional data on a two-dimensional display and the merits of Formal Concept Analysis (FCA) for grouping objects with shared properties based on the lattice theory. A case study of navigation services is presented to show the feasibility of our approach. We believe that the systematic processes and visualised outcomes offered by the proposed approach can enhance the efficiency of mobile service creation and serve as a starting point for developing more general models. Copyright © 2013 Inderscience Enterprises Ltd. Source

Lee G.,Korea Army Academy | Ding Y.,Texas A&M University | Xie L.,Texas A&M University | Genton M.G.,King Abdullah University of Science and Technology
Wind Energy | Year: 2015

Power curves are commonly estimated using the binning method recommended by the International Electrotechnical Commission, which primarily incorporates wind speed information. When such power curves are used to quantify a turbine's upgrade, the results may not be accurate because many other environmental factors in addition to wind speed, such as temperature, air pressure, turbulence intensity, wind shear and humidity, all potentially affect the turbine's power output. Wind industry practitioners are aware of the need to filter out effects from environmental conditions. Toward that objective, we developed a kernel plus method that allows incorporation of multivariate environmental factors in a power curve model, thereby controlling the effects from environmental factors while comparing power outputs. We demonstrate that the kernel plus method can serve as a useful tool for quantifying a turbine's upgrade because it is sensitive to small and moderate changes caused by certain turbine upgrades. Although we demonstrate the utility of the kernel plus method in this specific application, the resulting method is a general, multivariate model that can connect other physical factors, as long as their measurements are available, with a turbine's power output, which may allow us to explore new physical properties associated with wind turbine performance. Copyright © 2014 John Wiley & Sons, Ltd. Source

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