• 한국언론정보학보
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• 제63권
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• pp.76-100
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• 2013

이 연구는 디지털 융합 미디어 발전에 따라 변화하는 문화 환경을 조명함으로써 문화다양성을 개념을 재정립하고 분석프레임을 제시하는 것이 목적이다. 지금까지의 많은 연구들은 미디어다양성과 문화다양성이 매우 혼란스럽게 사용하고 있으며, 이로 인하여 문화다양성에 대한 개념이 제대로 정립되지 못하고 있는 실정이다. 커뮤니케이션학 분야에서는 미디어다양성에 대한 분석이 경제적 계량과 콘텐츠의 수량 측정을 크게 벗어나지 못함으로써 콘텐츠의 실질적인 내용인 문화의 다양성을 측정하는 데는 한계가 있다. 따라서 이 연구는 문화다양성 분석을 위해서 디지털 융합 미디어 이용문화를 메타문화로 정의하였다. 그리고 이 메타문화에 기반하여 나타나는 문화다양성을 미디어 활동의 다원성, 문화적 표현의 다양성, 문화 확산의 다양성 그리고 문화적 인지의 다양성으로 분류하여 분석하였다. 네 가지 범주가 각각 포함하고 있는 측정변인들은 디지털 융합 미디어 환경에서 문화다양성의 양태들을 밝혀낼 수 있는 요인들이다. 이 요인들에 대한 분석은 문화다양성을 보호하기 위한 정책 방향을 수립하기 위한 기준들이다. 문화다양성 정책의 궁극적인 목적은 메타문화 환경에서 문화공유지를 구축하는 것이다.

• 한국비블리아학회지
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• 제27권3호
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• pp.201-233
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• 2016

본 연구는 초등학교 3~6학년 다문화가정 어린이와 일반가정 어린이를 대상으로 문화다양성교육을 제공함으로써 세계의 여러 다른 문화와 다양한 가치, 삶의 방식을 존중하고 문화다양성에 대한 인식을 개선하고자 하였다. 이를 위해 공공도서관에서의 문화다양성교육 프로그램을 개발하여 적용하고 문화다양성교육 프로그램에 대한 사전-사후 인식 차이, 실험집단-비교집단의 인식 차이, 도서관 서비스와 이용률 및 서비스 활성화 방법에 대해 분석하였다. 그 결과, 문화다양성교육 프로그램 인식조사를 통해 문화다양성에 대한 이해, 수용, 배려, 존중 등이 높아진 것으로 나타났다.

• ETRI Journal
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• 제36권2호
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• pp.188-196
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• 2014

This paper describes a simple delay diversity technique for terrestrial digital multimedia broadcasting (T-DMB) and digital audio broadcasting in a single-frequency network (SFN). For the diversity technique, a delay diversity scheme is adopted. In the delay diversity scheme, a non-delayed signal is transmitted in the first antenna, and delayed versions of the signal are transmitted in each additional antenna. For an SFN environment with multiple transmitters, delay diversity can be executed by controlling the emission times of the transmitters. This SFN delay diversity scheme does not require any hardware changes in either the transmitter or receiver, and perfect backward compatibility can be acquired. To evaluate the performance improvement, laboratory tests are executed with various types of commercial T-DMB receivers as well as a measurement receiver. The improvement in the bit error rate performance is evaluated using a measurement receiver, and an improvement of the threshold of visibility value is evaluated for commercial receivers. Test results show that the T-DMB system can obtain diversity gain using the described technique.

• 한국전자파학회논문지
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• 제10권5호
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• pp.766-776
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• 1999

본 논문에서는 실내 전파 환경에서의 편파 다이버시티와 공간 다이버시티의 성능을 분석하기 위하여 영상 법을 기본으로 한 3차원 광선 추적법을 이용하였다. 본 모텔링은 선호강도 뿐만 아니라 채널의 페이딩 특성 을 예측할 수 있기 때문에 편파 및 공간 다이버시티 기법의 성능을 분석하는데 이용될 수 있다. 측정과 시율 레이션 결과로부터 편파 및 공간 다이버시티가 실내 무선 통선 채널의 성능을 향상시킬 수 있음을 확인하였 고, 특히 지향성 안테나를 이용한 편파 다이버시티를 제안하여 기존의 다이폴 안테나를 이용하는 다이버시티 기볍보다 우수한 성능을 가짐을 보였다.

• 한국전자파학회논문지
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• 제9권3호
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• pp.369-377
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• 1998

본 논문에서는 편파 다이버시티에 대한 전파전파 특성 분석과 상용의 이동전화 기지국 시스템에 적용하기 위 한 가능성을 검증하였다. 이를 위하여 교외지역 및 주거지역을 대상으로 $\pm45^{\circ}$ 선형 편파특성을 가진 이중편파 안테나를 이용하였고, 다이버시티 이득(Diversity gain)과 상호상관계수(Cross correlation coefficients)의 관 점에서 기존의 공간 다이벼시티의 성능과 비교 분석하였다. 분석 결과 공간 다아버시티가 편파 다이버시티보다 1~2 dB 정도의 다이버시티 이득은 높게 나타났으며, 휴대용 이동전화 환경에서는 편파다이버시티와 공간다이 버시티 각각에 대한 상호 상관 계수는 그 차이가 $\pm0.1$ 이내로 큰 차이가 없음올 CDF(Cummulative Distrib bution Function) 분석을 통하여 확인할 수 있었다.

• Journal of Microbiology and Biotechnology
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• 제27권12호
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• pp.2089-2093
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• 2017

The past decades have been a golden era during which great tasks were accomplished in the field of microbiology, including food microbiology. In the past, culture-dependent methods have been the primary choice to investigate bacterial diversity. However, using culturein-dependent high-throughput sequencing of 16S rRNA genes has greatly facilitated studies exploring the microbial compositions and dynamics associated with health and diseases. These culture-independent DNA-based studies generate large-scale data sets that describe the microbial composition of a certain niche. Consequently, understanding microbial diversity becomes of greater importance when investigating the composition, function, and dynamics of the microbiota associated with health and diseases. Even though there is no general agreement on which diversity index is the best to use, diversity indices have been used to compare the diversity among samples and between treatments with controls. Tools such as the Shannon-Weaver index and Simpson index can be used to describe population diversity in samples. The purpose of this review is to explain the principles of diversity indices, such as Shannon-Weaver and Simpson, to aid general microbiologists in better understanding bacterial communities. In this review, important questions concerning microbial diversity are addressed. Information from this review should facilitate evidence-based strategies to explore microbial communities.

• The Korean Journal of Ecology
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• 제27권2호
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• pp.79-86
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• 2004

An extensive study of the vegetation characteristics of the Hamersley Ranges, a mountainous desert area of north-west Australia, facilitated the comparison of plant species diversity measures with mountainous deserts of other parts of the world. Alpha diversity was defined as the number of species co-existing at local scales and was found to average 18 species per 0.1 ha for the Hamersley Ranges. This was found to be similar to seven other mountainous deserts in North and South America, and southern Africa. Variation in alpha diversity between these deserts was found to considerably lower than within deserts, suggesting that local processes control species richness at local scales. Beta diversity, defined here as turnover in species composition at various spatial scales, can be measured in many ways. For the Hamersley Ranges, Wilson's β ranged from 1.2 to 1.6 for five sites along a topographic gradient, whereas Whittaker's β between different plant communities was found to average 0.93. Comparable data was not found for other desert areas, but comparisons to non-desert areas suggest beta diversity within landscapes is relatively high and is likely to reflect the considerable landform heterogeneity of the Hamersley Ranges. 55∼70% of species were shared between different landscapes of the Hamersley Ranges; comparisons to other regions suggest beta diversity at this scale is relatively low. Gamma diversity, the number of species over large spatial extents, was successfully compared using regression analysis of the log-log species - area relationship. This revealed that the northern Sonoran desert has significantly less species than the Nama (inland) Karoo and Hamersley Ranges over medium spatial extents, but species numbers were similar at a regional scale. Several constraints to the valid comparison of species diversity were identified, including lack of standardisation of sampling techniques, the wide range of measures employed, general lack of published data, and the influence of the various components of spatial scale on most diversity measures. Recommendations on how to improve future comparative work are provided.

• Human Ecology Research
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• 제58권1호
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• pp.31-41
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• 2020

This study examined human rights perception, cultural diversity perception, level of character perception, and influencing factors for university students in order to prepare basic data on integrated education methods of character, human rights and cultural diversity and education program models. The research questions are as follows. 1. What are university students' perceptions of character, cultural diversity and human rights? 2. What is the status of the experience of family life education on character, cultural diversity, and human rights, and is it related to the level of perception? 3. What variables affect character perception, cultural diversity perception, and human rights perception? The survey targeted 407 students at two universities in Seoul and used IBM PASW Statistics as a tool to analyze data. The study results are as follows. First, university students' character, cultural diversity and human rights perception were above average; however, empirical education is still required because they had low scores in the area of action. Second, male university students have less experience in family life education on character, cultural diversity and human rights compared to female university students. Third, it is necessary to integrate education for character, cultural diversity and human rights because the most influential factors in character perception, cultural diversity perception and human rights perception were character education. The role of family life education should be considered important because personality education in the home showed a relatively high correlation.

• 한국전자파학회논문지
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• 제9권5호
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• pp.578-588
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• 1998

본 논문에서는 대표적인 고밀집 도심지역인 서울의 광화문 지역을 대상으로 이중 편파 안테나를 이용한 편파 다이버시티의 전파 전파 성능을 다이버시티 이득과 상호상관계수, 수신 채널의 평균 수신 신호 레벨에 대한 분석 을 통하여 수행하였고 이의 결과를 공간 다이버시티 구조와 비교 분석하였다. 분석 결과, 가시 거리 지역에서는 공간 다이버시티 이득이 편파 다이버시티 이득보다 2 dB 이상 증가하며 전 계를 지면에 대해 $45^{\circ}$로 송신하는 경우보다는 $^90{\circ}$로 송신하는 경우가 다이버시티 이득이 1 dB 큼올 알 수 있었 다. 이와는 대조적으로 비가시 지역에서는 편파다이버시티의 경우가 공간 다이버시티와 대동하거나 운용 환경에 따라서는 오히려 다이버시티 이득이 증가함을 알 수 있었다. 또한 $45^{\circ}$로 송신하는 경우가 $90^{\circ}$로 송신하는 경우보 다는 다이버시티 이득이 최소 1 dB 이상은 커짐을 확인할 수 있었다.

• Journal of Korea Trade
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• 제24권8호
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• pp.121-132
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• 2020

Purpose - The principle aim of this study is to further investigate the relationship between market diversity and export performance. We examine the benefits and costs of geographic market diversity regarding the number of countries exported to by firms on their export performance. Based on the financial risk reduction model and the entry costs model, we propose a way to incorporate the costs and benefits aspects of market diversity. Design/methodology - To empirically investigate our research question, the curvilinear relationship between market diversity and export performance, we built a secondary panel data set between 2015 and 2019, containing 17,863 observations of Korean exporting companies. A generalized least squares panel estimator with fixed effects was employed to test the hypothesis, and the statistical package, Stata 14, was used. Findings - Our main findings are as follows: As market diversity increases, export performance increases because exporters can diversify and reduce financial risks in export markets. However, the relationship between the two does not grow. As it peaks, the entry costs increase due to the high market diversity, thereby outweighing the benefits, leading, eventually to decrease in the export performance. Consequently, there is an inverted U-shaped relationship between market diversity and export performance. Originality/value - In the export and trade literature, the impact of market diversity on export performance has not been addressed yet, despite the importance of this subject. Many scholars have assumed a positive linear relationship between the two, considering only the decrease in market risks as the number of overseas markets increases, without examining the increase in the entry and management costs. Therefore, our study contributes by providing a new perspective for analyzing the characteristics and outcomes of market diversity.