• Journal of Information Technology Applications and Management
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• 제21권3호
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• pp.19-33
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• 2014

Crowdsourcing is a popular tool for firms to harness external knowledge and resources. One variation of crowdsourcing entails the use of corporate channels in social network services (SNS) such as Twitter to hold public idea competitions. This study examined the role of feedback interaction between participants of idea competitions. More specifically, the study examined the impact of incentives to provide feedback on other participants' ideas. We found that idea competitions where explicit incentives were introduced to elicit crowdsourced feedback in the form of qualitative comments resulted in improved idea generation performance-with more ideas generated overall, and more ideas generated through participant collaborations, through increased comment-posting activities. Based on the findings, implications for theory and practice are discussed.

• 지능정보연구
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• 제28권4호
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• pp.119-133
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• 2022

음식 문화 및 산업과 관련한 대표적 특징들 중에는 음식 배달 주문 산업이 성장하고 있다는 것과 유튜브와 같은 1인 미디어에서의 소위 '먹는 방송' (먹방)이 최고의 인기 콘텐츠로 자리 잡았다는 사실 등을 거론할 수 있다. 본 연구는 이러한 배경에 근거하여 두가지 초점을 두어 연구하고자 하였다. 먼저, 유튜브 먹방과 먹방 댓글에서 확인되는 대중들의 감성이 관련 음식의 배달 이용 건수에 영향을 미치는지를 회귀분석 모형을 통하여 확인하고자 하였다. 다음으로, 대한민국에서 대표적인 주문 음식인 치킨의 배달 이용 건수 데이터와 유튜브 먹방 댓글 데이터와 날씨 데이터를 활용하여, 머신 러닝을 통한 치킨 배달 주문 예측 모형을 구현하였다. 2015년 6월 3일부터 2019년 9월 30일까지 총 1,580개의 데이터를 활용하였고, 날씨 변수로서의 온도, 습도, 강수량과 유튜브 먹방 변수로의 영상에 달린 댓글 수, 댓글의 긍정어 수, 중립어 수, 부정어 수 등을 수집하였다. 본 연구에 활용된 데이터의 유튜브 먹방과 먹방 댓글의 감성이 배달 이용 건수에 영향 미침을 확인하기위해 선형 회귀 방법론을 사용하였으며, 예측모델을 위해 사용된 머신 러닝은 Linear Regression, Ridge, Lasso, Random Forest, Gradient Boost이다. 본 연구를 통해 유튜브 먹방과 댓글의 감성이 배달 이용 건수에 영향 미침을 확인하였고 예측 모형 또한 기존 모델보다 성능이 좋아짐을 Root Mean Square Error 값을 통하여 확인하였다. 본 연구는 먹방의 광고 효과를 확인하였으며, 배달 업종에서의 경영에 활용할 수 있는 함의를 제공하고자 하였다.

• 서비스연구
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• 제13권3호
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• pp.1-19
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• 2023

여행 마케팅 분야에서 브이로그와 같은 동영상 기반 소셜미디어 컨텐츠의 중요성이 높아지고 있다. 그럼에도 불구하고 시청자 반응 및 참여 행동을 향상시키는 콘텐츠 특징에 대한 연구는 제한적이다. 본 연구는 유튜브 여행 콘텐츠의 나타난 감정이 시청자 참여 행동, 특히 "좋아요"와 "댓글" 작성에 미치는 영향을 연구하였다. 본 논문에서는 방문자 수가 높은 세계 8개 관광도시에 관한 여행 관련 유튜브 동영상 4,619개의 나래이션을 머신러닝으로 추출하여 텍스트화 한 후 음이항 회귀분석을 통해 분석하였다. 그 결과 긍정 감정 및 부정의 감정 모두 "좋아요" 수에 유의한 영향을 미쳤다. 즉, 동영상에서 나타난 긍정적인 감정과 부정적인 감정이 각각 높을수록 더 많은 시청자들이 "좋아요"를 클릭하는 것으로 나타났다. 댓글 수에 측면에서는 부정적인 감정만 유의한 영향을 보인 반면 긍정적인 감정은 유의한 영향을 미치지 않는 것으로 나타났다. 본 연구는 경험재인 여행 상품의 고유한 특성을 고려할 때 유튜브에서 시청자 참여를 높이고자 하는 마케터들에게 어떠한 동영상 특징이 "좋아요"와 댓글등의 참여 행동을 유도할 수 있는지를 이해하고 전략 수립에 도움을 준다는 면에서 시사하는 바가 크다. 또한 소셜 미디어, 특히 유튜브의 맥락에서 시청자 참여도에 미치는 감정의 영향력을 검증하였다. 향후에는 감정에 대한 긍정-부정의 분류를 넘어 특정 감정이 참여도에 미치는 영향에 대한 고찰을 통해 소셜 미디어 동영상에 나타난 감정의 역할에 대한 이해를 깊이 할 수 있을 것이다.

• 천문학회지
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• 제54권6호
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• pp.171-182
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• 2021

The lack of short baselines, referred to as the short-spacing problem (SSP), is a well-known limitation of the performance of radio interferometers, causing a reduction of the flux detected from source structure on large angular scales. The very large number of antennas operated in the Atacama Large Millimeter/sub-millimeter Array (ALMA) generates situations for which the impact of the SSP takes a complex form, not simply measurable by a single number, such as the maximal recoverable scale. In particular, extended antenna configurations, complemented by a small group of closeby antennas at the centre of the array, may result in a double-humped baseline distribution with a significant gap between the two groups. In such cases one should adopt as the effective maximal recoverable scale the one associated with the extended array and use only the central array to recover missing flux, as one would do with single dish or ACA (Atacama Compact Array) observations. The impact of the missing baselines can be very important and may easily be underestimated, or even overlooked. The present study uses ALMA archival data of the ²⁹SiO(8-7) line emission of the AGB star W Hydrae for a demonstration. A critical discussion of the reliability of the observations away from the star is presented together with comments of a broader scope. Properties of the circumstellar envelope of W Hya within ~15 au from the star, many of which are not mentioned in the published literature, are briefly described and compared with R Doradus, an AGB star having properties very similar to W Hya.

• 환경영향평가
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• 제26권1호
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• pp.78-92
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• 2017

화력발전소 건설사업의 환경영향평가는 해당 사업으로 인해 주변 해양환경에 미치는 영향을 명확히 파악하고, 환경영향을 최소화함으로써 연안의 지속가능한 발전의 순기능을 담당하는데 있다. 이에 본 연구에서는 화력발전소 건설사업으로 인한 해양환경에 미치는 영향을 정확히 평가하고 이에 근거한 저감방안을 마련하기 위하여 화력발전소에 특화된 환경영향평가 가이드라인(안)을 마련하고자 하였다. 환경부, 산업통상자원부, 화력발전소 공기업 5사 담당자 및 해양물리, 해양동 식물 관련 전문가로 구성된 포럼을 통해 과학적이고 효율적인 해양환경 환경영향평가 가이드라인을 제시하였으며, 최근 7년간(2009년~2015년) 접수된 화력발전소 환경영향평가서 15개를 분석하여 해양환경 항목의 문제점을 도출하고, 환경영향평가서 작성규정, 국내 및 국외 환경조사 가이드라인, 화력발전소 환경영향평가 검토의견 등 광범위한 정보 수집을 시행하였다. 이 내용을 토대로 해양물리, 해양동 식물 관련 환경영향평가 가이드라인(안)을 마련하였다.

• Journal of Mechanical Science and Technology
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• 제19권8호
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• pp.1582-1596
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• 2005

Groundwater flow and behavior have to be investigated based on heterogeneous subsurface formation since the homogeneity assumption of this formation is not valid. Over the past twenty years, stochastic approach and Monte Carlo technique have been utilized very efficiently to understand the groundwater flow behavior. However, these techniques require lots of computational and numerical efforts according to the various researchers' comments. Therefore, utilizing new techniques with much less computational efforts such as Artificial Neural Network (ANN) in the prediction of the stochastic behavior for the groundwater based on heterogeneous subsurface formation is highly appreciated. The current paper introduces the ANN technique to investigate and predict the stochastic behavior of a well draw down in a confined aquifer based on subsurface heterogeneous hydraulic conductivity. Several ANN models are developed in this research to predict the unsteady two dimensional well draw down and its stochastic characteristics in a confined aquifer. The results of this study showed that ANN method with less computational efforts was very efficiently capable of simulating and predicting the stochastic behavior of the well draw down resulted from the continuous constant pumping in the middle of a confined aquifer with subsurface heterogeneous hydraulic conductivity.

• 전기학회논문지
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• 제58권3호
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• pp.467-477
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• 2009

Renewable Portfolio Standard (RPS) is a regulatory policy that requires the generation companies to increase the proportion of renewable energy sources such as wind, solar, LFG, fuel cell, and small hydro. Recently, Korean government decided to increase the portion of renewable energy to 3% to total electricity generation by 2012 from the current level of 0.13%. To achieve this goal, an innovative plan for market competitiveness would be required in addition to the present Feed-In-Tariff (FIT). That is Korean government has taken it into consideration to introduce a Renewable Portfolio Standard (RPS) as an alternative to FIT. This paper reviews the impact of RPS on the long-term fuel mix in 2020. The studies have been carried out with the GATE-PRO (Generation And Transmission Expansion PROgram) program, a mixed-integer non-linear program developed by Hongik university and Korea Energy Economics Institute. Detailed studies on long-term fuel mix in Korea have been carried out with four RPS scenarios of 3%, 5%, 10% and 20%. The important findings and comments on the results are given to provide an insight on future regulatory policies.

• 한국의류학회지
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• 제47권6호
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• pp.996-1011
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• 2023

This study introduces an effective marketing strategy for fashion SMEs and small designer brands utilizing Instagram as a social networking platform. The research compared the impact of two information delivery types (native advertisements vs. live streaming after native ads) and two types of promotional messages (scarcity vs. price discount) on SNS consumption value, and product attitude toward fashion designer brands. The study involved surveying 251 Korean women aged 25-55 with experience in buying designer products and using SNS. Data analysis was conducted using SPSS 26.0 and Process Macro v3.5. Results indicated that both native advertisements and live streaming enhance economic and social values in SNS consumption. Live streaming with price discount messages generates higher perceived SNS consumption values compared to scarcity messages. Consumers showed a more favorable attitude toward designer brand products when watching the live streaming of price discount messages rather than scarcity messages. The findings emphasize that the broadcast host actively induced participation to reveal viewers' social presence through comments or emphasized discount messages such as ultra-special prices during live streaming on Instagram.

• 한국IT서비스학회지
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• 제21권2호
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• pp.43-59
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• 2022

This study investigates an association among Facebook users' upward comparison (e.g., envy), social support (e.g., favorable comments and like), and life satisfaction, putting their self-esteem as a mediating variable. For this analysis, 1,332 female and male Facebook users in Seoul and other four cities in South Korea were surveyed. Structural equation modeling including confirmative factor analysis were employed as quantitative analysis methods. Results show that Facebook users' upward comparison with other users and social support significantly impact their satisfaction mediated by their self-esteem. Specifically, when users feel envious of other users, this emotion lowers their self-esteem, and subsequently, the self-esteem reduces their satisfaction. On the other hand, sufficient social support for users positively affects their self-esteem, which leads to the increase of their satisfaction. The present study is differentiated from previous studies in that it focuses on Facebook users' emotional changes in the process of sharing massive amounts of posts and finds a stepwise relationship among their feelings, including self-esteem as a mediating variable. Additionally, this study is the first to verify a situation when Facebook users' envy of other users' posts affects the decline in their satisfaction through the mediation of their self-esteem.

• Asian Journal for Public Opinion Research
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• 제10권2호
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• pp.102-122
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• 2022

From 2018 to 2020, the United States has repeatedly imposed sanctions on the Chinese company Huawei, which has triggered strong nationalist sentiments on the Chinese Internet. This paper is a qualitative content analysis of Zhihu netizens' views on US sanctions against Huawei to explore how anti-Western centrism influences young people's narratives. The results showed that they believe the Huawei matter is a deliberate hegemonic act by the United States because it fears the decline of its own technological status. Moreover, it is direct evidence that the United States is deliberately destroying China's economic development environment to slow down China's rise, as well as a typical manifestation of the injustice of the liberal international order. A further analysis revealed that their narrative logic is obviously influenced by the following aspects: 1) The mentality of national glory derived from comprehensive national strength leads them to believe that U.S. sanctions against Huawei are an obstacle to China's rise. 2) National humiliation leads them to view U.S. sanctions as a constant insult to China. 3) China's superiority created by China's comprehensive national strength and its scientific and technological achievements in recent years has boosted its confidence to challenge the West's absolute progress. This study examines the impact of anti-Western centrism on Chinese nationalist sentiment and offers a bottom-level perspective on the debate over the crisis of the liberal order.