• Journal of the Korea Society of Computer and Information
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• v.25 no.8
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• pp.23-30
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• 2020

As the 4th industrial revolution emerged, the latest technologies such as IoT, AI, Big data, AR/VR/XR are emerging. However, in the field of virtual reality (VR) technology platform services, there is no standardization and systematic support. In addition, various platform technologies related to virtual reality have been presented, making it difficult to select an API that should be selected for development. In this study, we analyzed the method for virtual reality development and the virtual reality (VR) technology that is being serviced by users. In addition, by presenting the advantages and disadvantages of each development platform, we intend to present a reference point for developers to select an efficient platform. In addition, it will help the developer to select an effective equipment and software platform in comparison with the advantages and disadvantages of various HMD devices used in virtual reality. The virtual reality (VR) development environment test used products from Oculus, and the software development environment was tested with two types: WebBased VR and HMD embedded.

• Journal of Digital Contents Society
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• v.18 no.4
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• pp.671-679
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• 2017

According to studies of many language education researchers including R. Ellis, a representative English education specialist, it is an effective and important method to improve the authenticity of English by learning a foreign language repeatedly in learner's actual situation. In this paper, we propose a foreign language learning service combined with context-awareness service, and develop foreign language learning contents which improves the authenticity of English learning based on the service. This approach is based on a study on digital education contents that helps learners to acquire a foreign language in an unconscious state in their real environment and a study to analyze the empirical characteristics of users based on real-time multi-sensed data.

• The Research Journal of the Costume Culture
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• v.17 no.4
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• pp.663-678
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• 2009

The growth of the middle school girls show big difference among the individuals and the development of each area of the body is not uniformed but diverse which could be understood as the period that the problems on the fit of the clothes occur extensively. Therefore, in this study, the somatotype of the middle school girls are intended to be categorized for the highly applicable clothes design. For this, the 3 middle schools in Jeonju were selected for anthropometric measurement of 324 middle schools. The items of measurement are related to the somatotype of middle school girls, clothes design which is consisted of total of 50 items. For the basic data of clothes was judged that the classification of somatotype related to the tops and bottoms would be rational; hence, it is classified into the upper part and lower part of the body to extract the body shape consistent factor. As a result of analyzing the factors, the upper body consistent was extracted as the 4 items: upper body circumference, upper body length, breast growth and arm length. It was displayed as 75.26% explicability. The lower body consistent factors are extracted as lower body height, lower body circumference, hip length, and rear shape with 78.62% explicability. To classify the somatotype of upper body and lower body, each factor score is made into the independent viable for group analysis. As a result, the upper body was classified into the 'upper body with small breast and long' and 'upper body with big breast'. The lower body was categorized as 'lower body with long hip length' and 'standard lower body'.

• Journal of KIISE
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• v.43 no.9
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• pp.1060-1065
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• 2016

Recently, there is an emerging need for parallel UHD video processing, and the usage of computing systems that have an asymmetric processor such as ARM big.LITTLE is actively increasing. Thus, a new parallel UHD video processing method that is optimized for the asymmetric multicore systems is needed. This paper proposes a novel HEVC tile partitioning method for parallel processing by analyzing the computational power of asymmetric multicores. The proposed method analyzes (1) the computing power of asymmetric multicores and (2) the regression model of computational complexity per video resolution. Finally, the model (3) determines the optimal HEVC tile resolution for each core and partitions/allocates the tiles to suitable cores. The proposed method minimizes the gap in the decoding time between the fastest CPU core and the slowest CPU core. Experimental results with the 4K UHD official test sequences show average 20% improvement in the decoding speedup on the ARM asymmetric multicore system.

• Journal of Convergence for Information Technology
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• v.10 no.2
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• pp.15-20
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• 2020

In this paper, we propose an ICT-based smart farm design. At present, the decrease in rural population is naturally inevitable due to the decrease of the total population. The economic burden on each farm grows with increasing labor costs. As a solution to this, the necessity of spreading smart farms using computing resources is emerging. The proposed system utilizes the ICT technology emerging from the Fourth Industrial Revolution. We will use big data analysis to collect a large amount of data and propose a platform for managing collected data and providing efficient services. The proposed platform consists of SOA service layer, middleware layer, resource pool layer and physical resource layer. ICT-based smart farm service can reduce costs and be easy to install and manage because ICT-based smart farm service provides only necessary functions from the user's point of view.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.16 no.4
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• pp.1-12
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• 2017

Traffic accidents are caused by a combination of human factors, vehicle factors, and environmental factors. In the case of traffic accidents where rental cars are involved, the possibility and the severity of traffic accidents are expected to be different from those of other traffic accidents due to the unfamiliar environment of the driver. In this study, we developed a model to forecast the severity of rental car accidents by using Naive Bayes classifier for Busan, Gangneung, and Jeju city. In addition, we compared the prediction accuracy performance of two models where one model uses the variables of which statistical significance were verified in a prior study and another model uses the entire available variables. As a result of the comparison, it is shown that the prediction accuracy is higher when using the variables with statistical significance.

• Journal of The Korean Association of Information Education
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• v.19 no.4
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• pp.517-524
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• 2015

In this paper, to find out the direction of interest related to the SW education, SW education news data were gathered and its contents were analyzed. The topic analysis of SW education news was performed by collecting the data of July 23, 2013 to October 19, 2015. By analyzing the relationship among the most mentioned top 20 words with the web crawling using R, the result indicated that the 20 words are the closely relevant data as the thickness of the node size of the 20 words was balancing each other in the co-occurrence matrix graph focusing on the 'SW education' word. Moreover, our analysis revealed that the data were mainly composed of the topics about SW talent, SW support Program, SW educational mandate, SW camp, SW industry and the job creation. This could be used for big data analysis to find out the thoughts and interests of such people in the SW education.

• Journal of Digital Convergence
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• v.18 no.4
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• pp.221-228
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• 2020

As industrial technology advances, convenience is also being developed. Many people living in big cities are commuting using transportation such as buses, taxis, cars, etc. and enjoy leisure, so research is needed to reduce the damages caused by traffic accidents. This study deals with estimating road-level rainfall in real-time. A rainfall observation data and radar data provided by the Korea meteorological administration were collected in real-time to create an integrated database, which was estimated as road-level rainfall by universal kriging method. Besides, we conducted a study to interactively visualization of mash-up road traffic information in real-time with integrating rainfall information.

• The Korean Journal of Mycology
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• v.17 no.4
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• pp.184-188
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• 1989

Effect of Metalaxyl-Mz and Aliette-F to Phytophthora capsici was studied in vitro and in vivo. Metalaxyl-Mz was more inhibitory than Aliette-F on Mycelial growth. Although Aliette-F had more inhibitory effect on zoosporangial formation, there was no big difference among the other concentrations of the two fungicides. A higher inhibitory trend of zoosporangial formation, however, was resulted by the chemical when compared to the control. The extract obtained from the red pepper treated with Metalaxyl-Mz showed a good inhibitory effect on mycelial growth, and there was not so big difference between 400 and 600 times concentrations. The 1000 times concentration was less inhibitory than the above two concentration levels. Although there no distinct difference the two chemicals, Aliette-F and Metalaxyl-Mz, however, preventive effect was higher than curative effect under the green house tests.

• Journal of the Korean housing association
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• v.15 no.2
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• pp.1-9
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• 2004

This study aims to provide basic data for designing aged care residential facilities in Korea, based on the investigation and analysis of the aged care residential services and their communal living areas in Australia focusing on their types, scales, arrangement and the specific design of each compartment. -. A residential building with 10 beds is composed of private zones and communal ones, and their space arrangement depends on how to arrange bedrooms where residents mainly stay. -. A lounge, 26.7 m$^2$ of its average scale, is a main space for daily lives and an important place for making friends with neighboring residents. -. A dining hall is an important area for activity as well as a space for dining. The average scales of dining room, kitchen, and whole space are 42.7 m$^2$, 28 m$^2$, and 70.8 m$^2$ respectively, and those for person are 2.7 m$^2$: 1.7 m$^2$:4.4 m$^2$, although the scales depend on facilities. -. An activity room is used for promoting the social relationship between residents and visitors. Three of the investigated facilities have big rooms of 42 m$^2$, 39 m$^2$ and 51 m$^2$. -. If there is no lavatory in a bedroom, 2-6 bathrooms for residents are arranged near bedrooms and they are relatively big including shower baths. If there is a lavatory in a bedroom, 1 toilet for visitors is arranged in a communal living area and its scale is small.