• 한국통신학회논문지
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• 제41권11호
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• pp.1481-1489
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• 2016

유무선 통신 기술 및 Internet Protocol (IP) 기술의 발전 및 보편화에 따라 최근 다양한 데이터 서비스가 등장하게 되었다. 이에 따라 1:1 데이터 전송을 주된 형태로 하는 전통적인 서비스와는 다르게, 1:N 데이터 전송을 활용하는 다양한 서비스가 등장하고 있으며, 이 서비스들은 1:N 전송의 효율성 및 성능 향상을 요구하고 있다. 특히 최근 많은 관심을 받고 있는 국가재난안전통신망에서 가장 중요한 서비스인 Push-To-Talk (PTT) 서비스의 경우 서비스 서버가 다수의 그룹 수신자에게 동일한 음성 데이터를 실시간 및 최소 지연 시간으로 전달해야 한다. 본 논문에서는 이런 서비스 요구 경향에 따라, 동일 데이터를 다수의 수신자에게 전달하기 위한 효율을 높이는 방법을 제시한다. 또한, 실제 유무선 통신망이 구축된 필드 환경에서 1:N 전송 성능을 어느 정도까지 높일 수 있는지 그 가능성에 대해 PTT 서비스 핵심 성능 지표 관점에서 분석해보고자 한다.

• 한국콘텐츠학회논문지
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• 제14권8호
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• pp.40-49
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• 2014

전지구화는 국제사회의 인구 이동을 더욱 가속화시켰으며, 한국도 이러한 변화로부터 예외가 될 수는 없었다. 한국은 국가의 경제 성장 및 발전을 위해 역사적으로 해외에 노동력을 수출한 경험이 있다. 그러나 1990년대 말부터 이러한 사회적 흐름이 바뀌었고, 국내에 거주하는 이주민의 수가 급증하였으며, 단일민족국가로서의 특징이 점차 변화하였다. 그러나 대중 매체를 통해 비춰지는 소수민족집단의 모습이 한국사회에 어떠한 문화적 및 정치적인 영향력을 행사하고 있는지 살펴볼 필요가 있음에도 불구하고 이에 대한 연구는 현저히 적은 것으로 나타났다. 따라서 본 연구는 한국공영방송에 비춰지는 소수민족집단에 초점을 맞추어 실증적 분석을 통해 한국사회의 시대적 변화 속에서 공영방송이 인종적 소수자들을 구체적으로 어떻게 보도하는가를 밝히고자 한다.

• 대한본초학회지
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• 제36권5호
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• pp.1-14
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• 2021

Objectives : From January 2020, when the first confirmed case of COVID-19 in Korea, the use of health information using the Internet is expected to increase. It is expected that there will be a significant change in the general public's interest in Korean herbal medicines for health care. Therefore, in this study, we tried to confirm the change in the search trend of Korean herbal medicines after the COVID-19 epidemic. Methods : Using the "Naver DataLab (http://datalab.naver.com)" service of a Korean portal site Naver, search volume was investigated with 606 Korean herbal medicines as keywords. The search period was from January 2020, right after the onset of COVID-19, to June 2021. The search results were sorted by the peak search volume and the total search volume. Results : 'Cheonsangap (천산갑, 穿山甲, Manitis Squama)' was the most searched Korean herbal medicine in the peak search volume and total search volume with least bias. Conclusions : The problem of supply and demand of Korean herbal medicines of high public interest was identified. Broadcasting and media exposure were the factors that had a big impact on the search volume for Korean herbal medicines. As it was confirmed that the search volume for Korean herbal medicines increased rapidly due to media exposure, it is necessary to provide correct information about Korean herbal medicines, improve public awareness, and manage stable supply and demand based on continuous search trend monitoring.

• International Journal of Contents
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• 제15권4호
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• pp.50-58
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• 2019

Baotu Spring Park, a must-visit place in Jinan, China, has been rated as the country's highest-level scenic spot by the Chinese government. However, social media that highly reflects public opinions tends to express a lower evaluation of Baotu Spring Park. Thus, this paper employs service design thinking methods to identify the problems of Baotu Spring Park and provide solutions from the perspective of visitors. Based on desk research, tourist behavior tracking, contextual interviews, and a customer journey map, it was found that the service gap of Baotu Spring Park lacks a unified and effective instruction system. Also, the activities, parking, and high-quality tourist souvenirs are deficient, and there is no online information delivery platform. Finally, five suggestions are made,-respectively:,- redesign the sign system, enhance the participation of tourists, redesign the tourist souvenirs and display space, offer parking areas and shuttle buses, as well as set up a dedicated application.

• 전자통신동향분석
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• 제34권3호
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• pp.1-12
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• 2019

In the digital era, broadcasting plays a very large role as a means of communication, as it no longer merely provides information or entertainment media. Particularly in the case of the visually and hearing-impaired, broadcasting is the primary means of acquiring information, so its role as a public service needs to be expanded. The development of digital technology enables the quantitative expansion of traditional methods of disability broadcasting, i.e., closed caption, sign language, and descriptive video service, with an acceptable level of quality. In this study, we review the current trends of, and concerns related to, broadcasting services for disabled people, as well as technological trends, and proposals for increasing visibility and accessibility to broadcasting for hearing-impaired people.

• 디지털콘텐츠학회 논문지
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• 제19권3호
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• pp.425-433
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• 2018

최근 공공데이터 개방율이 증가 하였고 관련 개발 역시 증가 하고 있다. 최근 정부의 정책 역시 공공데이터의 개방에 초점을 맞추게 되면서, OECD 회원국 중 공공데이터 지수는 2년 연속 1위를 하게 되었다. 하지만, 정부의 관심과 적극적인 지원에도 불구하고 창업 후 생존율은 OECD 회원국 가운데 최하위로 나타났다. 생존율의 낮은 원인은 소비자가 원하지 않는 제품을 선보이 것이 가장 큰 실패요인으로 파악되었다. 이에 본 연구에서는 창업시 부족한 소비자가 원하는 부분을 분석하여 창업 위치 분석 서비스를 제시한다. 이 과정에서 정부가 지원하는 다양한 공공데이터 중 창업 관련 데이터를 활용한다.

• International Journal of Knowledge Content Development & Technology
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• 제12권4호
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• pp.41-65
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• 2022

This study would understand the overall perception of our society about public libraries, analyzing the texts related to public libraries, utilizing the semantic connection network & sentiment analysis. For this purpose, this study collected data from the last five years with keywords, 'Library' and 'Lifelong Learning Center' from January 1, 2016 through November 30, 2020 through the blogs and cafés of major domestic portal sites. With the collected data, text mining, centrality of keywords, network structure, structural equipotentiality, and sensitivity analyses were conducted. As a result of the analysis, First, 'reading' and 'book' were identified as representative keywords that form the social perception of public libraries. Second, it turned out that there were keywords related to the use of the library and the untact service due to the recent spread of COVID-19. Third, in seeking a plan for the development of public libraries through the keywords drawn to have positive meanings, it is necessary to create continuous services that can form a new image of the library, breaking away from the existing fixed role and image of the library and increase the convenience of use. Fourth, facilities and facilities for library services were recognized from a neutral point of view. Fifth, the spread of infectious diseases, social distancing, and temporary closure and closure of libraries are negatively related to public libraries, and awareness of librarians has been identified as negative keywords.

• 스마트미디어저널
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• 제9권4호
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• pp.118-125
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• 2020

본 논문은 방대한 정보가 있는 자치단체 및 공공기관 웹 사이트에서 사용자가 원하는 정보서비스를 자동으로 추천하는 시스템을 제공하며, 본 시스템은 데이터를 수집하고 전처리하는 SiiRU 콘텐츠관리시스템을 기반으로 데이터 수집 방법을 정의하고, 수집된 데이터를 기계학습기반의 협업 필터링 알고리즘을 통해 사용자에게 큐레이션서비스(콘텐츠 및 메뉴)를 제공한다, 또한 본 논문에 사용된 데이터는 2019년에 수집된 약 1백만 건의 데이터를 바탕으로 구현하였다. 이렇게 분석된 데이터는 사용자들이 편리하게 볼 수 있도록 클라우드 태그 서비스나 추천메뉴를 제공하여 쉽게 접근할 수 없는 중요한 정보를 제공할 수 있으며, 자치단체 및 공공기관에 본 서비스를 실현할 수 있는 환경 구성도 제공한다.

• 한국동물위생학회지
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• 제30권3호
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• pp.353-362
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• 2007

A total of 1,354 samples was collected from bovine and porcine carcass from January 2005 to December 2006 in a slaughter house. Twenty five strains(1.8%) of Listeria monocytogenes were isolated from 1,354 samples using selective media. Ten(1.4%) L monocytogenes were isolated from the 677 of bovine carcasses, and 15(2.2%) were isolated from the 677 of porcine carcasses. Among 15 L mono-cytogenes from porcine, 11 siolates were serovars 1/2c, followed by 1/2b (3 strains, 20.0%) and 1/2a(1 strain) Out of 10 bovine samples, positive cases in 1/2a were 9 strains (90.0%), 1/2b were 1 strains(10.0%). PCR primers were selected to amplify a 520-base pair(bp) DNA fragment from the listeolysin O gene (hlyA) of L mono-cytogenes. A 520-bp product was detected in PCR with DNA from L monocytogenes, but not from the other Listeria species tested. A total of 25 L monocytogenes strains were analysed by PFGE after digestion with Apa I. PFGE analysis of genomic DNA showed the $14{\sim}18$ fragments ranging in size from 30 to 550 kb, resulting in 14 patterns.

• 한국환경보건학회지
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• 제41권6호
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• pp.397-404
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• 2015

Objectives: The aim of this study is to investigate microbial contamination in the school food service environment for the assessment of microbial food safety. Methods: We collected both swab samples from tables and desks and airborne bacterial samples from an elementary school (School A) and a high school (School B). Heterotrophic plate count, total coliform, Staphylococcus aureus, and Bacillus cereus were measured with selective media to quantify microbial concentration. PCR assay targeting 16S rRNA genes was performed to identify the strains of S. aureus and B. cereus isolated. In addition, we made a food service checklist for the locations to evaluate the food service environment. A Wilcoxon test was employed to examine the differences in microbial concentration between before lunchtime and afterwards. Results: Heterotrophic plate counts showed higher levels after-lunch compared to before-lunch at School B. However, levels of S. aureus were higher in the after-lunch period (p<0.05) in both classrooms and in the cafeteria in School A. B. cereus was only sparsely detected in School B. Several samples from food dining carts were found to be contaminated with bacteria, and facilities associated with food delivery were found to be vulnerable to bacterial contamination. Although microbial concentrations in the air showed little difference between before- and after-lunchtime in the cafeteria in School A, those in classrooms were greater after-lunchtime at both schools. Conclusion: Our results suggested that the microbial safety in schools after lunchtime of concern. Necessary preventive measures such as hygiene education for students and food handlers should be required to minimize microbial contamination during food service processes in schools.