• International Journal of Contents
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• 제18권1호
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• pp.65-75
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• 2022

This study aims to reveal the various differences within the factors that influence use satisfaction, continuous use intention, and media substitution intention, specifically in regard to the use motives and use behaviors of Netflix viewers. This study's results demonstrate that the following various factors affected use satisfaction, continuous use intention, and media substitution intention in differential ways. Firstly, the diversity of content influenced use satisfaction to a greater degree than social relations; and the diversity of content, social relations, and active participation all positively influenced continuous use intention. In other words, the more positively users appreciated the diversity of content, and the more strongly they had social relations, and the more actively they participated within communities, the greater degree to which they increased their continuous use intention for Netflix. However, the diversity of content and the convenience of use also had a negative effect on the media substitution intention for Netflix, which means that the more diverse the content and the more convenient the use of Netflix, the fewer the number of users who intended to cancel Netflix and subscribe to another OTT service or resubscribe to traditional media sources.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2007년도 추계학술대회
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• pp.602-609
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• 2007

Combining collaborative filtering with some other technique is most common in hybrid recommender systems. As many recommended items from collaborative filtering seem to be similar with respect to content, the collaborative-content hybrid system suffers in terms of quality recommendation and recommending new items as well. To alleviate such problem, we have developed a novel method that uses a diversity metric to select the dissimilar items among the recommended items from collaborative filtering, which together with the input when fed into content space let us improve and include new items in the recommendation. We present experimental results on movielens dataset that shows how our approach performs better than simple content-based system and naive hybrid system

• 한국콘텐츠학회논문지
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• 제16권2호
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• pp.762-771
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• 2016

본 연구는 20대 문화 예술 소비 다양성 결정 요인을 다양한 변수들을 바탕으로 살펴보기 위한 것이다. 주요 연구 결과는 다음과 같다. 첫째, 20대 문화 소비 다양성을 결정하는 요인을 살펴본 결과, 현재 문화 예술 경험 및 관심 요인을 포함해 방송 콘텐츠 이용 특성(정보 및 오락 장르) 요인이 정적으로 20대 문화 소비 다양성에 유의미한 영향을 미치는 것으로 나타났다. 반면, 소득 요인은 부적으로 20대 문화 소비 다양성에 영향을 미치는 것으로 나타났다. 둘째, 순수 및 대중 문화 소비 다양성 결정 요인을 살펴본 결과, 현재 문화 예술 경험 및 관심 요인 및 방송 콘텐츠 이용 특성(정보 및 오락) 요인은 정적으로, 소득 요인은 부적으로 순수 문화 소비 다양성에 유의미한 영향을 미치는 것으로 나타났다. 대중 문화 소비 다양성의 경우, 현재 문화 예술 경험 및 관심 요인을 포함해 방송 콘텐츠 이용 특성 요인은 정적으로, 성악-합창 등에 대한 교육 기간이 부적으로 다양성에 영향을 미치는 것으로 나타났다.

• Ocean and Polar Research
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• 제31권4호
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• pp.319-326
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• 2009

Analysis of four microsatellite markers from Mud Crab Scylla serrata revealed that there is high level of genetic diversity within this species. Genetic diversity of S. serrata was calculated using allele diversity, observed heterozygosity, expected heterozygosity (Het-exp), polymorphic information content, gene differentiation and Nei's $D_{A}$ distance. Mean polymorphic information content value was 0.797, which reflected high level of polymorphism across the loci of S. serrata. The Palau population has the highest genetic diversity (Het-exp=0.871), while the Kosrae population has the lowest genetic diversity (Hetexp=0.806). However, the geographical genetic distance among S. serrata populations from Yab, Chuuk, Pohnpei, Kosrae, and Palau were low (0.2009${\sim}$0.3350). These results suggest that despite their wide distribution, S. serrata are no different in geographical genetic diversity within the five sampled locations.

• Journal of Information Processing Systems
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• 제18권6호
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• pp.803-812
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• 2022

With the increasing number of mobile device users worldwide, utilizing mobile edge computing (MEC) devices close to users for content caching can reduce transmission latency than receiving content from a server or cloud. However, because MEC has limited storage capacity, it is necessary to determine the content types and sizes to be cached. In this study, we investigate a caching strategy that increases the hit ratio from small base stations (SBSs) for mobile users in a heterogeneous network consisting of one macro base station (MBS) and multiple SBSs. If there are several SBSs that users can access, the hit ratio can be improved by reducing duplicate content and increasing the diversity of content in SBSs. We propose a Deep Q-Network (DQN)-based caching strategy that considers time-varying content popularity and content redundancy in multiple SBSs. Content is stored in the SBS in a divided form using maximum distance separable (MDS) codes to enhance the diversity of the content. Experiments in various environments show that the proposed caching strategy outperforms the other methods in terms of hit ratio.

• 지능정보연구
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• 제14권1호
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• pp.101-115
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• 2008

일반적으로 혼합 추천 시스템(hybrid recommender system)이란 협업적 여과 방법(collaborative filtering)을 다른 기술들과 결합하여 사용하여 사용자가 원하는 정보를 손쉽게 찾을 수 있도록 도와주는 시스템이다. 협업적 여과 방법과 결합된 혼합 시스템은 대체로 내용이 유사한 아이템들이 추천 되어 전반적인 아이템 추천 성능 및 새로이 추가된 아이템에 대한 추천의 질이 떨어지는 문제가 있다. 이러한 문제를 해결하기 위해, 본 논문에서는 다양성(diversity)을 고려한 새로운 혼합 추천 시스템을 제안한다. 제안된 시스템에서는 첫 번째 단계로 협업적 여과 방법으로부터 추천된 아이템들 간의 비유사도를 측정한다. 두 번째 단계로는 첫 번째 단계에선 추천된 비유사도가 높은 아이템들을 내용 기반의 여과 방법(content-based filtering)에 적용하여 새로운 아이템에 대한 추천 성능을 향상 시킨다. 제안된 방법의 성능 평가를 위해 movielens 데이터를 이용하여 기존의 내용기반 추천 시스템 및 단순 혼합 시스템과 비교 평가하였다. 실험 결과 제안된 방법이 내용기반 추천 시스템 및 단순 혼합시스템보다 높은 추천 성능을 보였다.

• 한국학교수학회논문집
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• 제25권1호
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• pp.61-77
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• 2022

본 연구는 고등학교 기하 교과서에 수록된 이차곡선 성질 관련 세부 학습 내용을 중심으로 교과서별 편차에 대하여 살펴보았다. 고등학교 기하 교과서에서 다루어지고 있는 내용 요소의 다양성에 대하여 비판하고 이에 대한 대안을 제시하고자 하는 것보다 내용 요소의 다양성의 실태분석에 초점을 두었다. 교육과정에서는 이차곡선의 실생활 활용적 측면을 강조하여 그 유용성과 가치를 인식하게 하도록 할 것을 명시하고 있다. 그러나 분석 결과 교육과정의 취지와 교과서의 구성이 다소 부합하지 못하고 있었으며, 교과서별 내용 요소의 편차가 상당히 큼을 확인할 수 있었다. 교수·학습의 다양성을 인정하는 측면에서 이차곡선의 도입 방식과 성질의 교과서별 다양성은 충분히 인정될 수 있는 부분이다. 그러나 대학수학능력시험과 같은 전국단위 평가를 통한 대학입시 체제를 지향하고 있는 우리의 교육 현실에서 그 결과는 사회 전반적으로 매우 민감하기 때문에 수학 교과서의 내용적 다양성은 평가적 측면에서 유불리로 해석되기도 한다. 교과서 교수 학습·내용 요소의 다양성을 인정하는 동시에 평가의 평등성 측면을 반영할 수 있는 교과서 구성에 대하여 재고가 필요한 시점이다.

• Journal of Forest and Environmental Science
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• 제38권1호
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• pp.21-37
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• 2022

The present study was carried out to evaluate the chemical properties of soil in relation to forest structure and composition at different altitudes (900-2,600 m asl) in a part of Western Himalaya. The composite soil samples were taken from three (viz. upper, middle and lower) depths. The soils of the whole study area were acidic in nature (pH=4.90-5.51). Contents of Nitrogen (N), Phosphorus (P), Potassium (K), Carbon (C) and soil organic matter (SOM) showed much fluctuation during different seasons of year. Nitrogen content showed significant positive correlations with altitude (r=0.924, p<0.05) and different community parameters like species diversity (r=0.892, p<0.01) and species richness (r=0.941, p<0.05). Phosphorus exhibited direct correlations with carbon (r=0.637) while weak negative correlations with different community parameters like species richness & diversity, total basal cover (TBC), density and canopy cover. Carbon content and hence SOM showed direct correlations with Nitrogen (r=0.821, p<0.01); Phosphorus (r=0.637, ns) and Potassium (r=0.540, ns). But no significant relationship was observed between K content and species richness (p=0.30, r=-0.504); between K content and species diversity (p=0.14, r=-0.672); between P content and species diversity (p=0.29, r=-0.513) and species richness (p=0.23, r=-0.575). Among the different soil nutrients, only N showed a significant positive correlation with altitude while all others exhibited negative (but non-significant) correlation with it. The study revealed that the chemical properties affect and are reciprocally affected by forest structure and composition and that N rich soils of higher altitudes are best for the growth and development of forests.

• 아태비즈니스연구
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• 제14권2호
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• pp.141-151
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• 2023

Purpose - This study aims to determine whether four characteristics of tourism content on YouTube (i.e., entertainment; credibility; diversity; and informativeness) influence tourists' destination choices. Design/methodology/approach - A total of 201 Koreans and Mongolians who use YouTube were surveyed in the research. Validity and reliability, correlation, and regression analyze were performed in SPSS 29.0. Findings - As a result of the study, it was found that the features of YouTube tourism content, such as entertainment, credibility, and diversity, have a positive effect on tourists' choice of destination. Also, it was found that there is no difference in the perception of tourism content features between Korean and Mongolian YouTube users and it is not statistically significant. Research implications or Originality - Tourists' YouTube content shows that YouTube features such as entertainment, variety, and trustworthiness, influencing tourists' travel destination choices. The limitations of this study and suggestions for future research were discussed.

• 한국언어정보학회:학술대회논문집
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• 한국언어정보학회 2007년도 정기학술대회
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• pp.459-470
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• 2007

This study explores the textual characteristics, more precisely the quantity and diversity of nouns, of Japanese prime ministers' Diet addresses. In the field of stylistics, textual characteristics independent of the content have been examined with the aim on detecting the authors, genres, and chronological variations of texts. This study focuses instead on textual characteristics related to the content of texts, namely the quantity and diversity of nouns, because our aim is to analyze texts to better understand two political phenomena: (a) the difference between the two types of Diet addresses delivered by Japanese prime ministers, and (b) the perceived changes made to these addresses by two powerful prime ministers. It is a case study of the microscopic characterization of texts, which has become more and more important with the expansion in the scope of stylistics and the production of a wide variety of new types of texts following the advent of the Web.