• 보건교육건강증진학회지
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• 제33권3호
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• pp.83-93
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• 2016

Objectives: This study aimed (1) to share findings from the U.S. on customer use of social media for information seeking and sharing about food recall risks, and (2) to discuss the implications of the findings for the context of food safety and risk communication in Korea. Methods: A cross-sectional survey was conducted with 1,026 social media users aged 18 years or older in the U.S., recruited from the Knowledge Network's nationally representative panel. Results: About 26 percent of respondents used social media either to seek or share food recall information in the past year, with social networking sites being the most popular tool. With respect to social media use for information seeking, being married, perceived risk of getting foodborne diseases, and trust in Internet were significant, positive predictors; being Whites and trust in health professionals were negative predictors. Social media use for information sharing was positively associated with education, being married, foodborne disease history, and perceived risk of foodborne diseases; Whites, income, and trust in health professionals were negative predictors. Conclusions: The study gives theoretical, methodological, and practical implications for the context of food safety and risks in Korea.

• Asia pacific journal of information systems
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• 제29권3호
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• pp.382-406
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• 2019

We study the antecedents to tie formation on an (Facebook-like) enterprise social media platform implemented to support cross-boundary connections. Research has produced mixed findings regarding the role of social media in cultivating bridging vs. closed networks. We examine the tie formation patterns of 1,386 enterprise social media users over a two-year period. Specifically, we observe who became (or chose not s become) "friends" with whom at the dyadic level and relate the decisions to various mechanisms that affect one's network to expand, constrain, or bridge. Using logistic and OLS regressions, we find that users tend to form ties via reciprocity and transitivity (with friends of friends), both of which help expand one's network. We also find strong networking tendency toward functional and hierarchical homophily (same business unit and same rank, respectively), which is likely to constrain one's network (closed network structure). We find that one's participation in various online interest groups is likely to open one's network (bridging network structure) while no evidence found for preferential attachment. Overall, we find that enterprise social media offers features, some of which are likely to foster bridging while others foster closed networks via different mechanisms.

• 비교문화연구
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• 제44권
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• pp.59-85
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• 2016

최근 들어 라틴아메리카에서의 한류의 인기는 폭발적이다. 본 연구는 멕시코와 페루에서의 한류 현상을 2012년부터 2014년까지 3년간의 한류 현황과 미디어 분석을 통해서 살펴보았다. 멕시코는 한류가 처음으로 중남미에 진출한 나라로 중남미 한류의 연구에서 중요한 의미를 가지고 있으며 현재까지도 한류의 영향이 중남미 지역에서 큰 지역이다. 또한 페루는 2014년 이후 한류의 인기가 급증한 국가로 페루에서의 한류 현상과 미디어 분석은 향후 한류의 중남미 진출을 전망할 수 있는 좋은 기회가 될 것이다. 그리고 한류의 확장은 한국의 브랜드 이미지 제고에도 좋은 결과를 초래할 것이다.

• 방송공학회논문지
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• 제10권3호
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• pp.357-371
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• 2005

본 논문에서는 CDS(Cross-Diamond Search algorithm) 및 CDHSs(Cross-Diamond-Hexagonal Search algorithms)의 성능을 향상시키기 위하여 탐색 영역의 위치에 따라 최적의 탐색 형태를 적용하는 CDTS(Cross-Diamond-Triangle Search algorithm)를 제안한다. CDTS에서 탐색 영역의 위치에 따라 최적의 탐색 형태를 적용하기 위하여 다양한 실험 영상들의 움직임 분포를 먼저 분석하였다. 분석된 움직임 분포에 근거하여 CDTS 구현 시 탐색 영역 중심부에서는 십자 탐색 형태와 다이아몬드 탐색 형태를 적용하고, 나머지 탐색 영역에서는 삼각 탐색 형태와 다이아몬드 탐색 형태를 적용한다. CDTS에서 제안하는 삼각 탐색 형태는 기존 탐색 알고리즘에서 사용하는 대칭형 구조와는 다르게 비대칭형 구조를 가지고 탐색점을 더욱 감소시키는 효과를 제공하면서도 화질을 유지할 수 있다. CDTS를 CDS 및 CDHSs와 비교하였을 때 화질 열화 없이 각각 평균 16.22$\%$ 및 3.09$\%$ 정도의 탐색점 감소 효과가 나타났다.

• Journal of Information Processing Systems
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• 제10권1호
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• pp.1-22
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• 2014

Recent technological advances provide the opportunity to use large amounts of multimedia data from a multitude of sensors with different modalities (e.g., video, text) for the detection and characterization of criminal activity. Their integration can compensate for sensor and modality deficiencies by using data from other available sensors and modalities. However, building such an integrated system at the scale of neighborhood and cities is challenging due to the large amount of data to be considered and the need to ensure a short response time to potential criminal activity. In this paper, we present a system that enables multi-modal data collection at scale and automates the detection of events of interest for the surveillance and reconnaissance of criminal activity. The proposed system showcases novel analytical tools that fuse multimedia data streams to automatically detect and identify specific criminal events and activities. More specifically, the system detects and analyzes series of incidents (an incident is an occurrence or artifact relevant to a criminal activity extracted from a single media stream) in the spatiotemporal domain to extract events (actual instances of criminal events) while cross-referencing multimodal media streams and incidents in time and space to provide a comprehensive view to a human operator while avoiding information overload. We present several case studies that demonstrate how the proposed system can provide law enforcement personnel with forensic and real time tools to identify and track potential criminal activity.

• Human Ecology Research
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• 제60권1호
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• pp.115-130
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• 2022

This study aimed to understand what factors the mothers of infants consider to be important when choosing screen media programs for their children, and to investigate whether those features differ according to maternal socio-demographic characteristics (i.e., age, education level, employment status, and family income). The study participants comprised 948 mothers who were the primary caregivers and had at least one child aged 4-6. They were asked to select three of the following aspects as critical criteria for determining if a given screen media program is appropriate for infants: (a) contents suitable to the child's developmental level, (b) behaviors of characters, (c) appearance of characters, (d) visual aspects of program, (e) duration of screen media program, (f) whether the screen media program includes instructive contents, and (g) whether the program leads to opportunities for conversations among family members and activities with children. Multiple response frequency analysis and multiple response cross-analysis were used to analyze the mothers' responses. The results revealed that the majority of the mothers reported that 'contents suitable to the child's developmental level' represented the first-ranked criterion for selecting screen media programs for their child, which was followed by 'behaviors of characters,' and 'whether the screen media program includes instructive contents.' However, such criteria for screen media programs for infants differed according to maternal age, education level, employment status, and family income. These outcomes suggest that different information needs to be provided based on maternal characteristics in order to help mothers determine the quality of screen media programs for their infants.

• 식물조직배양학회지
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• 제24권5호
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• pp.257-262
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• 1997

Brassica와 Raphanus 간에 속간 교잡종을 육성하기 위해서 34개의 교배 조합을 설정한 다음 수분 12일이 경과된 배주를 BA와 GA 1.0 ㎎/L가 첨가된 MS배지에 접종하고 배의 발아율을 조사하였다. BA나 GA 첨가는 배의 발아에 큰 영향을 미치지 않았다. 무 속의 '내병총태'와 '중국청피'를 부계로 교잡한 조합에서 배의 발아율이 낮았으나 갓(Brassica juncea)을 부계로 교잡한 조합에서는 비교적 배의 발아율이 높았다. 이러한 결과는 배주배양시 배지에 첨가한 casein hydrolysate, malt extract, BA, kinetin 및 glutamine이 배의 발아에 미치는 영향보다는 부계나 모계의 교잡조합에 따라 배의 발아율에 상당한 차이가 있다는 것을 의미한다.

• 융합경영연구
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• 제10권6호
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• pp.47-57
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• 2022

Purpose: This study explored the relationship between product characteristics and customer purchase intention in cross-border online shopping. Research design, data, and methodology: Through literature review, the research model of product characteristics and consumers' purchase intention is constructed, and trust is taken as a medium variable. Based on the survey data of Chinese consumers, empirical analysis and hypothesis verification are conducted. This study used SPSS version 21 to confirm the reliability and validity of the research model. To confirm the media effect of the model in this study, the Sobel Test was used. Results: The results of hypothesis identification of this research model showed that 8 of the 11 hypotheses were adopted and 3 were rejected. Results confirmed the relationship between product characteristics (specification, diversity, reputation, novelty, quality) and customer purchase intention. Conclusions: The result from this study had particular theoretical significance for improving the research on cross-border online shopping systems to improve the safety and satisfaction of customers in cross-border online shopping.

• 자원환경지질
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• 제33권1호
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• pp.41-50
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• 2000

Geo-radar survey which has the advantage of high-resolution and relatively fast survey has been widely used for engineering and environmental problems. Three-dimensional effects have to be considered in the interpretation of geo-radar for high-resolution. However, there exists a trouble on the analysis of the three dimensional effects. To solve this problem an efficient three dimension numerical modeling algorithm is needed. Numerical radar modeling in three dimensional case requires large memory and long calculating time. In this paper, a finite difference method time domain solution to Maxwell's equations for simulating electromagnetic wave propagation in three dimensional media was developed to make economic algorithm which requires smaller memory and shorter calculating time. And in using boundary condition Liao absorption boundary. The numerical result of cross-hole radar survey for tunnel is compared with real data. The two results are well matched. To prove application to three dimensional analysis, the results with variation of tunnel's incident angle to survey cross-section and the result when the tunnel is parallel to the cross-section were examined. This algorithm is useful in various geo-radar survey and can give basic data to develop dat processing and inversion program.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2012년도 추계학술대회
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• pp.122-124
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• 2012

잡음이 존재하는 환경에서의 신호의 분산을 측정하는 것은 잡음 제거에 중요한 요소를 맡고 있다. 잡음을 제거하는 방법 중에 가장 보편적으로 사용하는 방법에는 위너 필터가 존재한다. 웨이블릿 기반의 위너 필터링은 저복잡성을 지닌 이미지 잡음 제거에 탁월한 효과를 보인다. 신호의 분산을 측정할 경우 어떤 모양의 필터를 적용하여 측정하느냐에 따라 분산이 달라지게 되므로 이미지의 잡음 제거에 영향을 미치게 된다. 이에 본 논문은 위너 필터에 적용되는 필터를 기존의 정사각형 모양(square-shaped)과 제안하는 십자가 모양(cross-shaped)을 각각 적용하여 이미지의 잡음을 제거하였다.