Tenan, South Korea
Tenan, South Korea

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Kang S.A.,Namseoul University
Lecture Notes in Electrical Engineering | Year: 2017

Possibility of using ICT to the education of physical activities is becoming a reality due to the increased interest in the field of physical activities that applied technologies such as motion recognition or virtual reality. This study sought to present the possibility of using ICT and education model for the education on the physical activities. Education of physical activities faces a number of limitations. In particular, share of the time and space limitations is high. Virtual reality can be cited as the ICT technology that can complement these limitations. Sports virtual reality system that enables sports experience service with high sense of immersion since sports and fun elements get mixed together is likely to be used for the education of physical activities since it is possible to complement the fun element while complementing the time and space, and environment limitations. When physical activity task is delivered, the following process is performed in order; searching for information via web or VOD, setting up the strategy for learning sports techniques, executing virtual reality simulation and evaluating the accuracy level of motions, carrying out physical activities by using related virtual reality sports program, feedback. The teaching strategy by applying virtual reality technology will be effective for learning exercise function. © Springer Nature Singapore Pte Ltd. 2017.


Kim H.,Namseoul University
Lecture Notes in Electrical Engineering | Year: 2017

NFV enhancing the infrastructure agility, thus network operators and service providers are able to program their own network functions (e.g., gateways, routers, load balancers) on vendor-independent hardware substrate. One of the main challenges for the deployment of NFV is the efficient resource (e.g. virtual network function (VNF)) allocation of demanded network services in NFV-based network infrastructures. However, the effective mapping and scheduling of VNFs are essential to successfully provide NFV services. In this paper, we proposed revised online (dynamic) virtual network function allocation scheme to cope with successive network service (NS) requests. Unlike previous research on resource allocation, we assumed that each virtual node processes one or more functions at a time using multiprocessing technologies as in the real environment. © Springer Nature Singapore Pte Ltd. 2017.


Lee H.-W.,Namseoul University
Journal of Convergence Information Technology | Year: 2012

This paper describes convergence behaviors of acoustic echo canceller with BSS(blind signal separation). Acoustic echo canceller may be deteriorated or diverged during double-talk period. So we use BSS technology to estimate the near-end signal and to get the error signal which is eliminated the near-end signal from the residual signal. We assume that the near-end path is a single channel and the acoustic echo path is multi-channel. And we use a copy of coefficients of the echo canceller for the mixing coefficients of the multi-channel. The blind signal separation method extracts the near-end signal from dual microphones by iterative computations with 2nd-order statistical character in the closed reverberation environment. The acoustic echo canceller using this method operates irrespective of double-talking. We analyzed convergence behaviors of the BSS method inside the acoustic echo canceller. The results show that the BSS technology by iterative computation converges stably, irrelevantly to the echo canceller.


Lee H.-W.,Namseoul University
Journal of Convergence Information Technology | Year: 2012

This paper describes an acoustic echo canceller with BSS(blind signal separation) for doubletalking. Acoustic echo canceller may be deteriorated or diverged during double-talk period. So we use BSS technology to estimate the near-end signal and to get the error signal which is eliminated the near-end signal from the residual signal. We assume that the near-end path is single channel and the acoustic echo path is multi-channel. And we use a copy of coefficients of the echo canceller for the mixing coefficients of the multi-channel. The blind signal separation method extracts the near-end signal from dual microphones by iterative computations with 2nd-order statistical character in the closed reverberation environment. The acoustic echo canceller using this method operates irrespective of double-talking. We verified performances of the proposed acoustic echo canceller by simulations. The results show that the acoustic echo canceller with this method improves ERLE(echo return loss enhancement) of more about 20dB than the normal echo canceller, and operates stably without a divergence of coefficients even double-talk period.


Shin Y.,Namseoul University
Communications in Computer and Information Science | Year: 2012

Considering national greenhouse gas emissions extract from buildings(25%) and transportation(17%), it is important to construct environmentally friendly city that is for modern human life. Urban planning method using TOD as an element of city planning scheme that is proposing sustainable built environment is a key element of low carbon and green city by interconnecting public transit and land use plan to cause high density development around station influence area. The purpose of this study is to explore TOD city revitalization method focusing on Toyama railway station & Surroundings area in Japan in order to find applicable measures in Korea. In Toyama, there are some projects like a revitalization plan of new city center, activation of public transportation, and downtown inhabitation warning project which are developed by effective transportation link with Toyama Railway Station. From this on, it's an important compound to be recognized as an element of urban facilities. © 2012 Springer-Verlag.


Choi S.,Namseoul University
Journal of Computer Virology and Hacking Techniques | Year: 2015

The growing company that provides high quality service to every customer by introducing a cloud system organization. However, the information needs diverse and different cloud systems, so every cloud system can act as a security system that provide appropriate cloud systems. Cloud services are becoming complicated and diversified depending on concerns about cloud security continues, the growing need of professionalism held by the cloud service (CSB : cloud service brokerage) companies. Thus, to analyze the various services, find my support legislation to solve, security and delete compatibility issues, the services of the best new business through service offerings tailored to the environment, and will implement the necessary management services which which is brokerage (CSB). This study presents a brokerage (CSB) development model, and suggests policy measures that apply to the co-operation that I am having difficulties in cloud service business models. © 2015, Springer-Verlag France.


Park W.,Seoul National University | Park S.,Namseoul University
Ergonomics | Year: 2013

Despite the prevalence of obesity and overweight, anthropometric characteristics of large individuals have not been extensively studied. This study investigated body shapes of large persons (Broca index ≥ 20, BMI ≥ 25 or WHR>1.0) using stature-normalised body dimensions data from the latest South Korean anthropometric survey. For each sex, a factor analysis was performed on the anthropometric data set to identify the key factors that explain the shape variability; and then, a cluster analysis was conducted on the factor scores data to determine a set of representative body types. The body types were labelled in terms of their distinct shape characteristics and their relative frequencies were computed for each of the four age groups considered: the 10s, 20s-30s, 40s-50s and 60s. The study findings may facilitate creating artefacts that anthropometrically accommodate large individuals, developing digital human models of large persons and designing future ergonomics studies on largeness. Practitioner Summary: This study investigated body shapes of large persons using anthropometric data from South Korea. For each sex, multivariate statistical analyses were conducted to identify the key factors of the body shape variability and determine the representative body types. The study findings may facilitate designing artefacts that anthropometrically accommodate large persons. © 2013 Copyright Taylor and Francis Group, LLC.


This paper proposes an inference methodology that can minimize the spreading effect caused by the occurrence of a feeder fault, a feeder overload, a main transformer fault, or a main transformer overload problem in a distribution system under a heavy load condition. First, the load transfer procedure is decomposed into multisteps and multistages. Then, a new inference methodology for searching the goal nodes as well as the fail nodes based on the local minimum tree search is developed. © 2012 IEEE.


Provided are a method of growing carbon nanotubes laterally, including forming catalyst dots to grow carbon nanotubes on a substrate, forming a sacrificial layer including a plurality of nanochannels including regions having the catalyst dots formed therein, and growing carbon nanotubes through the nanochannels, and a field effect transistor using the method.


Provided are a method of growing carbon nanotubes laterally, including forming catalyst dots to grow carbon nanotubes on a substrate, forming a sacrificial layer including a plurality of nanochannels including regions having the catalyst dots formed therein, and growing carbon nanotubes through the nanochannels, and a field effect transistor using the method.

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