• 한국인터넷방송통신학회논문지
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• 제23권6호
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• pp.119-124
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• 2023

본 논문은 시간 지역성과 인기 편향성을 가진 데이터 참조를 나타낼 수 있는 새로운 참조 모델을 제안한다. 기존의 참조 모델 중 대표적인 LRU 스택 모델은 시간 지역성, 즉 최근에 참조된 데이터가 다시 참조될 가능성이 높은 성질을 나타낼 수 있으나, 데이터의 서로 다른 인기도를 고려할 수 없는 약점이 있다. 이와 반대로 데이터의 서로 다른 인기도를 반영할 수 있는 모델로 독립 참조 모델이 있으나, 시간에 따른 데이터 참조 성향의 변화를 모델링할 수 없는 한계가 있다. 본 논문이 제시하는 참조 모델은 이 두 모델의 한계를 극복하여 서로 다른 데이터의 인기도와 시간에 따른 참조 성향의 변화를 모두 반영할 수 있는 특징이 있다. 또한, 본 논문에서는 캐쉬 교체 알고리즘과 참조 모델의 연관성에 대해 살펴보고 제안한 모델의 최적성에 대해 보인다.

• Asia pacific journal of information systems
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• 제24권2호
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• pp.191-210
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• 2014

As mobile devices that can be connected to the Internet have spread and networking has become possible whenever/wherever, the Internet has become central in the dissemination and consumption of news. Accordingly, the ways news is gathered, disseminated, and consumed have changed greatly. In the traditional news media such as magazines and newspapers, expert editors determined what events were worthy of deploying their staffs or freelancers to cover and what stories from newswires or other sources would be printed. Furthermore, they determined how these stories would be displayed in their publications in terms of page placement, space allocation, type sizes, photographs, and other graphic elements. In turn, readers-news consumers-judged the importance of news not only by its subject and content, but also through subsidiary information such as its location and how it was displayed. Their judgments reflected their acceptance of an assumption that these expert editors had the knowledge and ability not only to serve as gatekeepers in determining what news was valuable and important but also how to rank its value and importance. As such, news assembled, dispensed, and consumed in this manner can be said to be expert-based recommended news. However, in the era of Internet news, the role of expert editors as gatekeepers has been greatly diminished. Many Internet news sites offer a huge volume of news on diverse topics from many media companies, thereby eliminating in many cases the gatekeeper role of expert editors. One result has been to turn news users from passive receptacles into activists who search for news that reflects their interests or tastes. To solve the problem of an overload of information and enhance the efficiency of news users' searches, Internet news sites have introduced numerous recommendation techniques. Recommendations based on popularity constitute one of the most frequently used of these techniques. This popularity-based approach shows a list of those news items that have been read and shared by many people, based on users' behavior such as clicks, evaluations, and sharing. "most-viewed list," "most-replied list," and "real-time issue" found on news sites belong to this system. Given that collective intelligence serves as the premise of these popularity-based recommendations, popularity-based news recommendations would be considered highly important because stories that have been read and shared by many people are presumably more likely to be better than those preferred by only a few people. However, these recommendations may reflect a popularity bias because stories judged likely to be more popular have been placed where they will be most noticeable. As a result, such stories are more likely to be continuously exposed and included in popularity-based recommended news lists. Popular news stories cannot be said to be necessarily those that are most important to readers. Given that many people use popularity-based recommended news and that the popularity-based recommendation approach greatly affects patterns of news use, a review of whether popularity-based news recommendations actually reflect important news can be said to be an indispensable procedure. Therefore, in this study, popularity-based news recommendations of an Internet news portal was compared with top placements of news in printed newspapers, and news users' judgments of which stories were personally and socially important were analyzed. The study was conducted in two stages. In the first stage, content analyses were used to compare the content of the popularity-based news recommendations of an Internet news site with those of the expert-based news recommendations of printed newspapers. Five days of news stories were collected. "most-viewed list" of the Naver portal site were used as the popularity-based recommendations; the expert-based recommendations were represented by the top pieces of news from five major daily newspapers-the Chosun Ilbo, the JoongAng Ilbo, the Dong-A Daily News, the Hankyoreh Shinmun, and the Kyunghyang Shinmun. In the second stage, along with the news stories collected in the first stage, some Internet news stories and some news stories from printed newspapers that the Internet and the newspapers did not have in common were randomly extracted and used in online questionnaire surveys that asked the importance of these selected news stories. According to our analysis, only 10.81% of the popularity-based news recommendations were similar in content with the expert-based news judgments. Therefore, the content of popularity-based news recommendations appears to be quite different from the content of expert-based recommendations. The differences in importance between these two groups of news stories were analyzed, and the results indicated that whereas the two groups did not differ significantly in their recommendations of stories of personal importance, the expert-based recommendations ranked higher in social importance. This study has importance for theory in its examination of popularity-based news recommendations from the two theoretical viewpoints of collective intelligence and popularity bias and by its use of both qualitative (content analysis) and quantitative methods (questionnaires). It also sheds light on the differences in the role of media channels that fulfill an agenda-setting function and Internet news sites that treat news from the viewpoint of markets.

• Journal of Computing Science and Engineering
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• 제7권1호
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• pp.21-29
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• 2013

The introduction of recommender systems to existing online services is now practically inevitable, with the increasing number of items and users on online services. Popular recommender systems have successfully implemented satisfactory systems, which are usually based on collaborative filtering. However, collaborative filtering-based recommenders suffer from well-known problems, such as popularity bias, and the cold-start problem. In this paper, we propose an innovative collaborative-filtering based recommender system, which uses the concepts of Experts and Novices to create fine-grained recommendations that focus on being novel, while being kept relevant. Experts and Novices are defined using pre-made clusters of similar items, and the distribution of users' ratings among these clusters. Thus, in order to generate recommendations, the experts are found dynamically depending on the seed items of the novice. The proposed recommender system was built using the MovieLens 1 M dataset, and evaluated with novelty metrics. Results show that the proposed system outperforms matrix factorization methods according to discovery-based novelty metrics, and can be a solution to popularity bias and the cold-start problem, while still retaining collaborative filtering.

• 한국컴퓨터정보학회논문지
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• 제27권10호
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• pp.223-233
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• 2022

본 연구는 SNS에서 정보 프라이버시 염려와 신뢰 그리고 그와 관련된 요인들을 분석하였다. 특히, 정교화 모델을 바탕으로 정보품질, 프라이버시 정책, 지각된 SNS 앱 명성, 낙관주의를 추출하였으며, 정보 프라이버시 염려, SNS 플랫폼에 대한 신뢰, 사용의도 간의 관계를 분석하였다. 마지막으로 신뢰전이 이론을 적용하여 SNS 사용자들에 대한 신뢰와 SNS 플랫폼에 대한 신뢰와의 관계를 분석하였다. 연구 결과에 따르면 정보품질과 프라이버시 정책, 낙관주의는 정보 프라이버시 염려에 유의한 영향을 미치는 것으로 나타났으나, 지각된 SNS앱 명성은 정보 프라이버시 염려에 유의한 영향을 미치지 못하는 것으로 나타났다. 또한, 정보 프라이버시 염려는 SNS 플랫폼에 대한 신뢰에 유의한 영향을 미치며 SNS 사용자들에 대한 신뢰는 사용의도에 유의한 영향을 미치나 SNS 플랫폼에 대한 신뢰는 사용의도에 유의한 영향을 미치지 못하는 것으로 나타났다. 마지막으로, 신뢰전이 이론에 따라 SNS 사용자들에 대한 신뢰가 SNS 플랫폼에 대한 신뢰로 전이가 되는 것을 확인하였다. 본 연구의 결과는 SNS 기업들이 고객의 정보 프라이버시 보호 행동과 신뢰에 대한 이해와 서비스 향상에 도움을 줄 것으로 본다.

• 한국엔터테인먼트산업학회논문지
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• 제15권8호
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• pp.1-18
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• 2021

1990년대 중반부터 국내 음악시장에서 큰 인기를 끌기 시작한 아이돌 음악은 현재 K-POP의 전 세계적 인기에 힘입어 주요한 글로벌 콘텐츠의 하나로 자리 잡았다. 이로 인해 한국의 음악시장은 전 세계 6위 규모의 음악시장을 형성하는 등 성장을 거듭하고 있으며, 국내의 음반 기획사들은 아이돌 그룹 육성과 아이돌 음악 제작에 더욱 집중하고 있다. 아이돌 음악의 세계적인 성공은 놀라운 것이지만, 이는 국내 음악시장이 아이돌 음악 위주로 편중되는 결과를 낳았다. 연구 결과 유사한 형태의 음악인과 음악 콘텐츠로 편중되는 현상은 몇 가지 문제점이 있는 것을 확인할 수 있었다. 첫째, 유행에 치우친 문화콘텐츠가 줄곧 수명에 관한 문제에 직면하듯, '한류' 또한 정체성과 지속성 측면에서 고민하지 않을 수 없다. 둘째, 특정 연령의 소비자만을 대상으로 하여 다른 연령층의 문화적 소외 현상을 초래할 수 있다는 점, 세 번째로 아이돌 그룹 제작에 필요한 비용의 규모로 인한 창작 경로의 위축 현상 및 아이돌 음악인의 예술 활동 수명 문제 등 다양한 문제점이 발생하고 있음이 관측되었다. 본 논문은 대중음악 역사에 있어 글로벌 음악시장에 지대한 영향을 끼쳐온 영·미권 음악시장과 국내 음악시장의 비교 분석을 통해 국내 아이돌 편중 현상의 실태를 도출하였으며, 리커트 척도를 활용한 전문가 설문조사를 통해 이론과 결과를 검증하였다. 또한 아이돌 편중 현상으로 인해 발생하는 문제점들을 문화 다양성 이론에 입각하여 고찰해보았으며, 이를 해결하기 위한 개선 방향도 제언하였다.

• 한국콘텐츠학회논문지
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• 제17권4호
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• pp.12-24
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• 2017

본 연구는 이주민의 미디어 재현 변화를 분석하기 위하여, KBS <이웃집 찰스>에 나타난 새로운 이주민의 재현을 내용분석하였다. <이웃집 찰스>는 지상파 프라임타임 시간대에 편성되어, 안정된 시청률을 보이면서 방송되고 있다. 기존 이주민 프로그램과 비교, <이웃집 찰스>가 재현에서 보이는 차이점은 크게 인구사회학적으로 다양한 속성의 이주민 출연과 결혼이주남성의 주인공 등장을 들 수가 있다. 차이의 원인을 보면, 최근 이주의 형태가 동남아 결혼여성과 노동자 중심에서 지역적으로 서구 사회를 포함하고 결혼남성이 증가하는 형태로 다양화하고 있다. 이런 변화가 미디어 재현을 부분적으로 견인하고 있다고 본 연구는 발견하였다. <이웃집 찰스>에서 이주민 재현 대상자는 다양해졌지만, 이주민을 한국 전통 문화에 통합되어야 하는 대상으로 간주했던 민족주의적인 특징도 잔존했다. 이주민의 활동을 공적 영역으로 확장시키고, 사회적 차이와 편견에 대한 의견 개진, 한국 전통문화에 대한 비판 등은 이주민의 재현을 긍정적으로 확장시킨다. 동시에, 젠더적인 관점에서 보면, 이주민 가족에서 일어나는 다양한 형태의 문제들이 재현되었지만, 전통적인 가족주의 담론이 문제 해결 수단으로 제시되었다. 정리하면, 본 연구는 이주민과 관련한 사회적 변화와 함께 나타나는 이주민 재현 변화를 분석, 기존 이주민 연구를 보강하고자 한다.

• 대한융합한의학회지
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• 제3권1호
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• pp.5-13
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• 2022

Objectives: Smoking had a long negative impact on public health. The ingredients of a cigarette are major risk factors for several diseases. Owing to the problems about economic and quality of life, we need to ensure smoking cessation (SC). There are several approaches for SC including pharmacological therapy, nicotine replacement therapy, education, and behavioral intervention. However, due to some limitations, other alternative approaches are gaining popularity. Acupuncture has been reported to have few side effects and be more effective than some conventional treatments in several articles. However, there are no systematic reviews on the comparison of acupuncture combination treatment with other conventional monotherapies. Methods: Randomized controlled trials that used acupuncture as an adjunct treatment for SC will be searched and data will be summarized according to the predefined criteria. The primary outcome will be the abstinence rate, and secondary outcomes will be adverse events and biochemical indicators. We will use Review Manager to perform a meta-analysis, Cochrane Collaboration Risk of Bias tool for the risk of bias assessment, and the Grades of Recommendation, Assessment, Development and Evaluation approach to determine the quality of evidence. We will investigate the efficacy and safety of acupuncture combination treatment for SC with this study. Ethics and dissemination: This study will provide reliable clinical evidence on additional effect of acupuncture on smoking cessation. We will publish our results in a peer-review journal.

• Journal of Ecology and Environment
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• 제41권2호
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• pp.34-44
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• 2017

Background: Monitoring terrestrial vegetation cover condition is important to evaluate its current condition and to identify potential vulnerabilities. Due to simplicity and low cost, point intercept method has been widely used in evaluating grassland surface and quantifying cover conditions. Field-based digital photography method is gaining popularity for the purpose of cover estimate, as it can reduce field time and enable additional analysis in the future. However, the caveats and uncertainty among field-based vegetation cover estimation methods is not well known, especially across a wide range of cover conditions. We compared cover estimates from point intercept and digital photography methods with varying sampling intensities (25, 49, and 100 points within an image), across 61 transects in typical steppe, forest steppe, and desert steppe in central Mongolia. We classified three photosynthetic groups of cover important to grassland ecosystem functioning: photosynthetic vegetation, non-photosynthetic vegetation, and bare soil. We also acquired normalized difference vegetation index from satellite image comparison with the field-based cover. Results: Photosynthetic vegetation estimates by point intercept method were correlated with normalized difference vegetation index, with improvement when non-photosynthetic vegetation was combined. For digital photography method, photosynthetic and non-photosynthetic vegetation estimates showed no correlation with normalized difference vegetation index, but combining of both showed moderate and significant correlation, which slightly increased with greater sampling intensity. Conclusions: Results imply that varying greenness is playing an important role in classification accuracy confusion. We suggest adopting measures to reduce observer bias and better distinguishing greenness levels in combination with multispectral indices to improve estimates on dry matter.

• 패션비즈니스
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• 제24권3호
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• pp.121-137
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• 2020

This thesis makes it an aim to develop designs of Shinhanbok coats interpreting and applying the formative structure of the lattice window pattern in Huijeongdang of the Changdeokgung palace, one of the best architecture in Chosun dynasty. Literature review about the history and characteristics of the window of Huijeongdang of the Changdeokgung palace was performed on the basis of the internet resources and papers, and the examples of the fashion design applying the lattice window patterns were analyzed. Then, three style Shinhanbok coats were designed and presented with making use of 6 kind of lattice window patterns as its motif. The coats were designed in flexible size, attempting to clad any kind of body size and shapes. Design 1 drawn from Wanjasal, Tisal, Design 2 drawn from Ajasal, Yongjasal, Tisal, design 3 drawn from Bitsal, Jungjasal. In conclusion, lattice window patterns of the traditional beauty highlighted in view of modern times might be suggested as the motif for expressing the proportion with balance and rhythm with stability. The division of the space with the line was tried with the technique of the bias cutting, stitching and taping with the design of simplicity signified in the aesthetics of the vacant space in addition to its ornamental effects. Thus, this study would like to contribute to the popularity of the Shinhanbok outlined in modern application and unique taste through the study and applications of the traditional lattice window pattern of Korea.