• Journal of Korea Game Society
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• v.18 no.1
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• pp.83-94
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• 2018

This study is to analyze the difference of satisfaction according to the usage motivation of Live video streaming and characteristics of the adopter(early adopters, late adopters). For this purpose, we conducted a survey of 283 people in the age of 10~30 using AfreecaTV. As a result of the study, users spending daily hours on watching Afreeca TV showed a positive effect on the usage motivation. It shows only one difference in education level between the demographic characteristics, based on the adopter characteristics. Also the differences in the satisfaction factors were found to be habits, communication, entertainment accessibility in the early adopters and accessibility, credibility, habits, accessibility were significant influences on the late adopters.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.306-308
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• 2018

본 연구에서는 체중 감량을 위해 무분별한 다이어트 식품의 남용을 막고, 다이어트 보조 식품에 대한 정보를 제공하기 위해서 감성 분석을 활용하여 다이어트 보조 식품에 대한 온라인 후기를 분석하였다. 먼저, 다이어트 보조 식품을 그 특성에 따라 네 가지 종류로 분류하고 각 카테고리 별로 긍정 및 부정 점수를 계산하였다. 이를 위해 체중 감량에 대한 감성 사전을 다이어트 식품에 대한 후기를 텍스트 마이닝하여 구축하였다. 특히 부작용이 있는 식품에 대한 부정 점수에 가중치를 두기 위해서 WHO-ART 에서 정의한 부작용 용어에는 가중치를 두어 처리하였다. 분석 결과 단백질 보충 식품군이 긍정 점수가 가장 높게 나타났고, 이는 다이어트를 위한 목적 이외에도 운동을 전문적으로 하는 사람들에게 오랜기간 사용되어 왔기 때문인 것으로 해석된다. 또한 식욕 억제제 식품군이 긍정점수는 가장 낮고 부정 점수는 가장 높게 나타났는데, 이는 식욕억제제의 주성분인 펜타민에 의한 가능성이 클 것이라고 예측된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1184-1187
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• 2011

스마트폰 시장이 커지면서, 사람들이 하루에 업로드하고 다운로드하는 어플리케이션의 수 또한 급격히 증가하고 있다. 앱스토어와 안드로이드마켓에 등록된 어플리케이션의 종류는 어마어마하며, 사람들은 자신의 생활을 편리하게 해줄 어플리케이션 혹은 재미를 위한 어플리케이션을 다운로드하고자 한다. 하지만 현재 어플리케이션에 대한 평가는 점수로만 이루어져있기 때문에 어느 부분에서 뛰어난지, 어떤 부분의 기능이 떨어지는지는 사용자가 알 수 없고, 특정 기능을 중요시하는 사용자일 경우 별점이 높아도 해당기능이 만족스럽지 않으면 만족감의 정도는 대단히 떨어지게 된다. 그러면 다른 어플리케이션을 받아 같은 작업을 반복해야하는데, 이 경우가 반복될 경우 비용적인 문제뿐만 아니라 사용자에게 매우 번거로운 일이다. 따라서 본 논문에서는 기존 사용자들이 자신이 사용한 어플리케이션에 대해 작성한 후기를 오피니언 마이닝 기술을 적용시켜 각 키워드별, 즉 속성별로 평가하고 긍정/부정 여부를 데이터베이스에 저장하여, 해당 어플리케이션을 검색한 미래의 어플리케이션 사용자에게 시각적으로 정보를 알려주어 사용자의 수고를 덜어주고자 한다. 어플리케이션 다운로드가 매우 단순한 작업이지만, 다운로드 수가 많기 때문에 본 논문의 제안을 적용한다면 비용을 절감시켜 줄 뿐만 아니라 매우 효율적인 작업이 될 것이라 기대한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.273-274
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• 2012

요즘 사람들은 대부분 스마트폰을 사용하고 있다. 이것은 간편하고 약간의 시간을 투자하여 구인구직 정보를 쉽게 만들 수 있는 어플리케이션으로 이 프로그램은 스마트폰에 어플리케이션을 설치 후, 사용자가 시간과 장소에 구애 받지 않고 손쉽게 구인구직 정보를 작성하거나 그에 해당하는 자료를 검색하고 면접후기와 같은 정보를 공유하는데 목표를 두고 있다.

• Korean Journal of Heritage: History & Science
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• v.54 no.4
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• pp.4-21
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• 2021

The purpose of this study is to examine the names and types of walls constructed in the late Joseon Dynasty in YeonggeonUigwe, a record of construction works of the Joseon Dynasty, and to examine the current status and name of walls constructed in the main hall and the Yeongnyeongjeon Hall of Jongmyo Shrine. The results of the study are as follows. First, the name of the wall can be divided into four types depending on the characteristics, including direction, location, shape, function, material, and complexity, and was used as a compound word in front of the wall. Second, some of the wall types related to the material were found to have differences in the timing of theypes of walls. Since the 18th century, the use of earthen walls has been reduced, and the use of wooden walls and paper walls are often used. Third, the walls of the Jongmyo Shrine were composed of a mud wall and a fireproof wall. A fireproof wall was installed in the main hall, including a pillar, while the Yeongnyeongjeon Hall was installed only between the pillar and the pillar. Fourth, the Gap Wall can be defined as the "wall constructed at the upper part of the chamber used in the construction of the building in Jongmyo." This study is meaningful in that it attempted to clarify the definition of a wall in the late Joseon Dynasty by examining the names and examples of walls used in the late Joseon Dynasty, focusing on walls that lacked research in familiarity.

• Journal of Bio-Environment Control
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• v.30 no.3
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• pp.196-205
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• 2021

This research was conducted in order to analyze the difference in yield through the changes in growth and measuring the photosynthesis efficiency in cherry tomatoes. Seedlings of cherry tomato 'Nonari' were used as scion and non-grafted control, while 4 different grafted tomatoes 'Powerguard', 'T1', 'L1', and 'B.blocking' were used as rootstocks. Plants grafted onto 'B.blocking' produced the highest fruit yield (417.5 g plant^-1), whereas non-grafted plant 'Nonari' had the lowest fruit yield, (354.2 g plant^-1) at the latter period of cherry tomatoes in May. The flowering position in May, plant grafted onto 'B.blocking', showed 14-17 cm, whereas non-grafted plant 'Nonari' showed 10-14 cm. The growth strength on May 15, non-grafted plant 'Nonari', showed 8.43 mm which was the lowest value among the treatments. Grafted plants kept the growth balance until the end of the harvest that led to an increase in fruit yield, while non-grafted plant weakened the vigor earlier that led to a decrease in fruit yield. Grafted plants showed higher values of chlorophyll fluorescence variables than the values of non-grafted plant. These results indicate that grafting influenced fruit yield which was observed as maintaining growth balance for longer and an increase in photosynthesis efficiency compared to non-grafting.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.273-274
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• 2020

본 시스템은 도서관 이용을 목적으로 만들었다. 초.중.고등학교에서 사용 가능하며 학생의 경우 대출, 반납, 도서연장, 희망도서 등록 등을 바코드를 이용하여 안전하고 편리하게 사용 할 수 있다. 앱을 통해 대출한 도서의 대출기간 확인과 대출 기간 연장 기능을 추가하여 연체로 인한 문제를 감소하도록 하였다. 학교 측에서 도서 후기 작성으로 독후감 대회를 주최할 수 있고 학생들이 어떠한 도서를 희망하는지 알 수 있다. 이런 다양한 활동을 컴퓨터뿐만 아니라 앱을 통해 스마트폰에서도 사용가능하도록 하였다.

• The Journal of the Korea Contents Association
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• v.20 no.7
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• pp.127-138
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• 2020

This study aims to analyze influences of self-perceived health, participation in social activities on life satisfaction and mediating effect of participation in social activities of the elderly by age group. For this, Structural Equation Model(SEM) was implemented by using data of the 6th wave of KLoSA with 2,106 young-olds and 2,219 old-olds. The results are as follows: The young-old elderly had higher level of self-perceived health, higher participation in social activities, and higher life satisfaction than the old-old elderly, and the mediating effect of participation in social activities was founded only in the young-old elderly. As a result of multi-group analysis, the influence of self-perceived health on life satisfaction was confirmed by no difference between both groups and the influence of self-perceived health on the participation in social activities was relatively higher in the old-old elderly. In the path of participation in social activities on the life satisfaction, the young-old elderly were found to have a significant effect. Through above results, the intervention plan considering the differences between groups was discussed in order to improve the elderly's life satisfaction.

• Journal of the Korea Society of Computer and Information
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• v.20 no.4
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• pp.131-138
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• 2015

One of the most conspicuous characteristics of a business model that pursues expanding customer relationship is that it tries to lock in customers by encouraging them to repeat purchase in the long-term with the help of "Follow" function in Social Networking Service (SNS), which enables producers to automatically register the customers as potentially important ones and to offer them customized marketing services. In the value chain of the agriculture sector, producers of agricultural products can use SNS functions to provide loyal customers with valuable information and experiences such as the real-time information of their farm and products, hidden stories about the whole process from seeding to harvesting, and the storage and cooking methods of their products. These activities help the producers invoke customers' desire to live in the farm and to grow the products themselves. They also raise the accessibility of the producers' websites as customers are able to share a variety of news and knowledge such as the release of new products. This means that the producers's websites are now functioning to enable the producers to perform sales and promotion related activities. It is a big leap from the traditional e-commerce business model where sales and promotion of a product were separated and could be connected only through outside links. This two-way, viral characteristics of marketing services using SNS facilitate customers to share product information and their purchase experience with each other, which leads to more effective and efficient communication within the customer community.

• Geophysics and Geophysical Exploration
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• v.12 no.1
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• pp.105-113
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• 2009

The interpretation of observed waveform characteristics identified in refraction and wide-angle reflection data increases confidence in the crustal structure model obtained. When calculating traveltimes and raypaths, wavefront methods on a regular grid based on graph theory are robust even with complicated structures, but basically compute only first arrivals. In this paper, we develop new algorithms to compute traveltimes and raypaths not only for first arrivals, but also for fast and later reflection arrivals, later refraction arrivals, and converted waves between P and S, using the modified wavefront method based on slowness network nodes mapped on a multi-layer model. Using the new algorithm, we can interpret reflected arrivals, Pg-later arrivals, strong arrivals appearing behind Pn, triplicated Moho reflected arrivals (PmP) to obtain the shape of the Moho, and phases involving conversion between P and S. Using two models of an ocean-continent transition zone and an oceanic ridge or seamount, we show the usefulness of this algorithm, which is confirmed by synthetic seismograms using the 2D Finite Difference Method (2D-FDM). Characteristics of arrivals and raypaths of the two models differ from each other in that using only first-arrival traveltime data for crustal structure analysis involves risk of erroneous interpretation in the ocean-continent transition zone, or the region around a ridge or seamount.