• Journal of the Korea Convergence Society
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• v.11 no.11
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• pp.189-194
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• 2020

In this study, the durability on heat was considered through the thermal stress analyses on models A, B, and C of laptops. Model A is an integral part, indicating that the heated keyboard showed the highest temperature and the monitor part far from the heated one showed the coldest. In models B and C, only the heated keyboard parts are modeled, so it can be seen that they get hot overall. In the case of model A, the thickness of the laptop keyboard was thicker, but there were the most deformations, while model C had the thinnest thickness with the smallest stress and deformation. Model B had the highest stress but relatively little deformation. It is considered that the result of thermal analysis in this study can be used to make the latest efficient design of durable laptop. The durability of laptop against the heat can be evaluated by applying this study result to the laptop. And it is seen that the result can be the design of laptop with strength and the aesthetic convergence.

• Journal of The Korean Association of Information Education
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• v.17 no.3
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• pp.305-316
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• 2013

Despite the potential implications of Facebook use, there is a distinct lack of empirically derived theory for designing learning environment. This may be because Facebook is a social tool and there has been limited opportunity for exploratory research regarding Facebook based learning. Therefore, the purpose of this study is to investigate learning presence factors affecting learning outcomes in Facebook-based collaborative learning. Forty two college students participated in the Facebook-based collaborative learning activity, and the data from thirty nine were used for step-wise multiple regression analysis. In addition focus group interview was conducted to examine learning presence of Facebook-based collaborative learning. The results reported that cognitive presence predicted significantly learning outcomes, however, social and emotional presence did not predict learning outcomes. The implication of this study and future research were discussed in this research.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.27 no.2
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• pp.135-149
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• 2016

As the public reading campaign has been popular, the book festival, a sociocultural event in relation to the book and reading, becomes a growing public interest. The book festival which could be diversified by each community and its environment would be understood in the perspective of the performance of public library, the diffusion of public reading campaign and the sociocultural togetherness of the community. In that, this study focuses on the book festival of Seongbuk-Gu, Seoul, held in 2015. Specifically, this study looks into the theoretical underpinnings and the background of book festival, examines the case of the '2015 Seongbuk-Gu Book Festival' systematically, and analyzes the factors that influence the book festival, in order to enhance our understanding of the book festival in general.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.7
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• pp.627-635
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• 2015

We propose a dual-layer differential equal-gain codebook design methodology for LTE-Advanced(LTE-A), IEEE802.ac, and radar system having multiple transmit and receive antennas, and make computer simulations to evaluate its link-level performaces. M-ary phase shift keying constellation is used as its codeword elements to utilize low-cost power amplifiers at mobile stations. Especially, the proposed codebook can meet radar systems requirement for the high-powered equal-gain transmission property. Due to the temporal correlation of the adjacent channel, the proposed differential codebook can quantize only the differential information of the channel instead of the whole channel subspace, which virtually increase the codebook size to realize more accurate quantization of the channel. The proposed codebook has the same properties of LTE codebook that is, constant modulus, complexity reduction, and nested property. Computer simulations show that the proposed codebook performs better than the conventional 8-ary codebooks with the same amount of feedback information.

• Journal of Korean Society of Archives and Records Management
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• v.14 no.2
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• pp.117-128
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• 2014

Social Network Service (SNS) has gained great popularity. Recently, facebook has been used most active. Most of government ministries of Republic of Korea operates facebook. In the case of facebook, it takes advantages of possibilities to inform the direction of policy to aggregate opinions of people for issues. Information gained from facebook has a very important value to be reflected in the policy or to understand public opinions. Long-term storage for this information should be considered. In the case of overseas, tools for long-term storage of documentary facebook have recently been developed. However, it does not save all the data in facebook and ignores the principles for long-term storage. These tools are limited to a simple backup. Therefore, this study aims to investigate how to reproduce, store and collect facebook page records of the government ministries.

• Journal of the Korea Society of Computer and Information
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• v.18 no.11
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• pp.241-254
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• 2013

The purpose of this study is to analyse the effects of social network service on the collaborative learning. Four groups were categorized depending on the use of different types of the social network services - Kakao Talk, Facebook, both Kakao Talk and Facebook, and unused group. A preliminary test revealed that there was no difference in mobile efficacy, career decision making self-efficacy, course interest among the four groups. In the post test, the groups that used either Kakao Talk group or the group that used both Kakao Talk and Facebook retained significantly higher average score in team collaboration scale than Facebook group and unused group. The analysis of the messages in Facebook exhibited that the group used both Kakao Talk and Facebook generated larger number of messages, read, replies, clicks of "good" than the groups used only Facebook. These results strongly support the statistical significance.

• Journal of the Korea Computer Graphics Society
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• v.25 no.3
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• pp.115-122
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• 2019

We In this study, We tested for artificial intelligence-based virtual space story books were planned. The proposed virtual space concept, a story book with the characteristics of Augmented Virtuality, was implemented Several steps are needed to proceed with the virtual space storybook's story. First, a user brings a real object in to virtual space and recognizes the real object with an artificial intelligence-based object-recognition software. Second, when object recognition progresses, the virtual 3D model is augmented in the virtual space, which is then inserted into the virtual space and rendered. Finally, software projected a virtual space storybook on the desk in which users can touch and select real-objects. This virtual space storybook was implemented using the new story-making technology by applying the virtual space concept. the Augmented Virtuality concept is to augment real objects based on virtual space. To confirm this we tested a user test using the virtual space storybook. the user seemed as if can the distinction between real objects and virtual images. Also very well and that understood the process of putting the real objects in virtual space.

• Journal of Korean Society on Water Environment
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• v.38 no.6
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• pp.316-326
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• 2022

This study aimed to investigate the causes of the increasing Total Phosphate(TP) in the mainstream of Mangyeong river over the past 10 years, and suggested a reduction plan of about 3 points. First, the high TP concentration was continuously released in the discharge outlet of the Haepo bridge stormwater pipeline. The average TP concentration was 5.066 mg/L and values as high as 29.470 mg/L were measured. The highest pollution contribution rate to the Mangyeong river was more than 70 %. The cause of the pollution was expected to take place somewhere in Wanju Industrial Complex. Second, the average TP concentration of wastewater-treated effluent in the H factory was 0.405 mg/L. If a TP reduction facility is additionally installed in the H factory, it will help reduce TP uptake by Lake Saemangeum. Third, the TP concentration of untreated non-point source point flowing into the Samrae stream was very high with an average of 2.828 mg/L. Also, the pollution contribution rate of Samraecheon 2 to Mangyeong river was 21.8 % on average and up to 58 %. The pollution contribution rate was also high during the agricultural season and the winter, during which the flow rate is decreased. Investigation of these three points may be continuously needed, and analysis results and policy proposals presented to Jeollabukdo and Wanjugun to manage pollution sources.

• 프린팅코리아
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• v.13 no.11
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• pp.116-116
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• 2014

제9회 파주북시티 국제출판포럼이 '2014 파주북소리' 축제 행사의 일환으로 지난 10월 6일과 7일 양일간에 거쳐 아시아출판문화정보센터 1층 대회의실에서 열렸다. 국제출판포럼에는 한국, 중국, 일본, 대만의 출판인, 편집자, 번역자, 교수 등이 한자리에 모여 상호 번역 현황을 점검하고 이를 통해 아시아의 지식공동체 기반 구축을 모색했다.

• 프린팅코리아
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• v.13 no.11
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• pp.48-49
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• 2014

'파주북소리 2014'가 지난 10월 3일부터 12일까지 열흘 동안 파주출판도시에서 열렸다. 올해로 4회를 맞은 파주북소리는 문화체육관광부가 선정한 대한민국 대표축제의 하나로 문화체육관광부와 파주시 후원으로 진행됐다. 올해 행사는 주말외에도 개천절, 한글날 등 공휴일이 포함돼 있어 어느 해보다 않은 사람들이 행사장을 찾았다.