• 한국산업정보학회논문지
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• 제18권2호
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• pp.59-69
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• 2013

2012년말 기준으로 우리나라는 모바일 통신가입자가 5,500여만명에 이르고 이 중 97.3%의 가입자가 휴대폰 특히 스마트폰을 이용하여 모바일 통신을 이용하는 것으로 조사되었다. 2010년 150만명 수준의 스마트폰 가입자가 3년 만에 무려 20배이상 증가하는 급격한 시장의 변화가 나타난 것이다. 이와 같은 통신환경 변화의 구체적인 모습을 사회기술적 관점에서 살펴보기 위하여 본 논문은 2010년부터 2012년까지 3개년 간의 전자신문기사를 분석하였다. 발췌된 기사는 모두 11,156건으로, 이 기사에 등장하는 모바일 통신환경과 관련된 핵심 단어는 모두 5,119개 였다. 이렇게 추출한 핵심단어가 발췌된 기사에 등장하는 빈도분석 결과를 바탕으로 살펴본 우리나라 모바일 통신환경은 기술중심적 양적팽창에만 집중되는 것으로 분석되었다. 따라서 사회적 관점의 변화와 그로 인한 부정적 결과가 많은 문제점을 발생시키는 것으로 조사되었다. 보다 건전한 통신환경 구축을 위한 정책 및 기업들의 전략 변화가 요구되는 시점이며, 이를 위해서는 성숙기에 접어든 우리나라 통신환경을 사회기술적 관점에서 접근해야 할 필요성이 있다.

• Safety and Health at Work
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• 제10권3호
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• pp.305-313
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• 2019

Background: The oil and gas industry is one of the riskiest industries for confined space injuries. This study aimed to understand an overall picture of the causal factors of confined space accidents through analyzing accident reports and the use of a qualitative approach. Methods: Twenty-one fatal occupational accidents were analyzed according to the Human Factors Analysis and Classification System approach. Furthermore, thirty-three semistructured interviews were conducted with employees in different roles to capture their experiences regarding the contributory factors. The content analyses of the interview transcripts were conducted using MAXQDA software. Results: Based on accident reports, the largest proportions of causal factors (77%) were attributed to the organizational and supervisory levels, with the predominant influence of the organizational process. We identified 25 contributory factors in confined space accidents that were causal factors outside of the original Human Factors Analysis and Classification System framework. Therefore, modifications were made to deal with factors outside the organization and newly explored causal factors at the organizational level. External Influences as the fifth level considered contributory factors beyond the organization including Laws, Regulations and Standards, Government Policies, Political Influences, and Economic Status categories. Moreover, Contracting/Contract Management and Emergency Management were two extra categories identified at the organizational level. Conclusions: Preventing confined space accidents requires addressing issues from the organizational to operator level and external influences beyond the organization. The recommended modifications provide a basis for accident investigation and risk analysis, which may be applicable across a broad range of industries and accident types.

• 한국실내디자인학회논문집
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• 제38호
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• pp.21-29
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• 2003

This study began to classify the studies on 'culture' in the field of environmental design overall. The classifying process adopted not the approach to preselect the criteria but the phenomenological inductive approach and content analysis method focusing on environmental design in order to understand which place the environmental design had taken. As a result, following aspects were reviewed: what is the area in which the studies on culture is made under the environmental design; what is the trend of using the word 'culture' in terms of logical connection; what is the level of approach to culture from the viewpoint of search, correspondence or application stage. On the whole, followings were drawn as conclusions. First, the interest of the studies on culture has been increased with time especially in the field of interior design. Second, the word 'culture' has become to be used a lot as 'cultural', and was used together with traditional, enterprise and material. Lastly, culture was studied at a starting point by and large. Although the papers, the objects of this study, are confined to five kinds of journals, the analysis of them is helpful to preestimate the trend of studies on culture because they have propensity to lead the international professional academic world.

• 정보처리학회논문지B
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• 제11B권5호
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• pp.587-596
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• 2004

최근들어 오디오, 비디오와 이미지 같은 다양한 디지털 멀티미디어 데이터의 인덱싱, 브라우징과 질의를 위한 새로운 형태의 시스템이 개발되었다. 이러한 시스템은 각 미디어 스트림을 실제 물리적 이벤트에 따라서 작은 유닛단위로 나누고, 물리적 이벤트들을 검색을 위해서 효율적으로 인덱스화 시킨다. 본 논문에서는 오디오-비주얼 데이터의 분석과 세그멘테이션을 위해서 각 데이터가 가지고 있는 오디오, 이미지, 비디오 특징을 이용하는 새로운 방법을 사용한다. 이것은 이미지나 비디오만을 분석했던 이전의 방법들을 문제점을 해결 할 수 있다. 본 논문에서는 이와 같은 방법을 이용하여 XCRAB이라고 불리는 웹 기반 멀티미디어 검색 시스템을 구현하였고, 성능평가를 위해서 여러가지 질의의 조합을 이용하여 실험을 하였다.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.3111-3111
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• 2001

The implementation of NIR and chemometrics in the Pharmaceutical industries is still in strong progress, both regarding qualitative and quantitative applications and beneficial results are seen. Looking at the development so far, NIR will change the pharmaceutical industry even more in the future. This presentation will address the experiences and progress achieved regarding the application and implementation of quantitative methods for determination of content uniformity and assay of tablets with less than 10% w/w of active, using Near Infrared transmittance spectroscopy in combination with PLS. Also qualitative methods for identification of the same tablets by Near Infrared reflectance spectroscopy will be discussed. Four commercial tablet strengths are formulated and produced from two different compositions by direct compression. Three different strengths are dose proportional, i.e. fixed concentration by varying in size. The aim was to replace the conventional primary methods for analysing content uniformity, assay and identification by NIR. Studies were performed on comparing transmittance versus reflectance spectroscopy for both applications on the dose proportional tablets. The model for determination of content uniformity and assay was developed to cover both coated and uncoated tablets, whereas the qualitative model was developed to identify coated tablets only. The impact of the tablet formulation, tablet size and coating, resulted in individual models far each composition The best calibration was achieved using diffuse reflectance for the identification purposes and diffuse transmittance for the quantitative determination of the active content within the tablets. As NIR in combination with other techniques opens up the possibility of total quality management within the production, the transfer of the above-mentioned models from a laboratory based approach to an at-line approach at H.Lundbeck will be addressed too.

• 정보화정책
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• 제29권3호
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• pp.48-60
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• 2022

이 연구는 미국 연방통신품위법 230조의 개정 논의를 신제도주의의 관점에서 분석하였다. 지금까지 내구력을 유지하며 미국 인터넷 내용규제의 기본틀을 구성해왔던 연방통신품위법 230조의 면책 조항은 오늘날 중대한 전환에 직면해 있다. 이 조항을 개폐하려는 정치적 시도들이 초당적인 협력으로 진행되고 있기 때문이다. 역사적 제도주의의 관점으로 연방통신품위법 230조의 개폐 논의를 분석한 결과, 미국 인터넷 내용규제 레짐의 변동은 가짜뉴스나 개인 정보 유출과 같은 외생적 사건과 함께, 행위자 간의 경쟁과 갈등이라는 내생적 요인이 복합적으로 작용해 발생한 것으로 여겨진다. 이상의 분석은 한국의 인터넷 내용규제 거버넌스의 제도개선과 방향성에 대해서도 함의를 지닐 수 있다.

• 대한수학교육학회지:수학교육학연구
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• 제10권1호
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• pp.35-55
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• 2000

There seems to be a public consensus that the content of Korean mathematics textbooks is extensive and of a high level of difficulty. However, such judgment is the result of a generalization based on individual experience or on the results from comparisons of the international levels of achievement. Therefore, a more objective and stricter approach to the determination of the quantity and level of difficulty of mathematics content is necessary. For this purpose, this study has compared the content of Koreas 6th and 7th junior high school curriculums, and the Korean mathematics curriculum to textbooks of the United States, which has a considerable influence on the making of Korean mathematics textbooks. First of all, a comparison of Koreas 6th and 7th junior high school mathematics curriculums showed a slight reduction in the total quantity of content, as more content was deleted than was added in the 7th curriculum. However, given the fact that the number of hours of mathematics classes has been reduced, the reduction in content cannot be regarded as anything more than a simple reflection of the reduction in hours, proving that the 7th curriculum has not met its revision objective of reducing the content by 30%. Meanwhile, the comparison of the United States junior high school mathematics textbooks to Korea's 7th curriculum showed that the 7th grade content in the United States was much broader, encompassing content which in Korea ranged from the 2nd grade of elementary school to the 2nd year of junior high school. Therefore, on the surface, it may appear that the overall level of content in the American mathematics textbook is lower than that of the Korean. However, there are several cafes, such as statistics and probability, where certain content was more difficult and introduced at an earlier grade in the United States than in Korea. In fact, it can be said that Korea students tend to find content of the mathematics textbooks to be harder than they actually are because they are delivered as a mere aggregate of algorithms, with little consideration to its application in their everyday lives. In this respect, there is much room for improvement on the mathematics textbooks of Korea.

• 대한간호학회지
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• 제53권6호
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• pp.584-596
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• 2023

Purpose: This study aimed to explore the perspectives of frontline nurses working during the novel coronavirus disease 2019 (COVID-19) pandemic. Methods: An online qualitative study was conducted using a pragmatic approach. The data were collected in August 2021. Registered Korean nurses who provided direct nursing care to patients with confirmed COVID-19 were eligible for this study. An online survey was used to gather free-text data, which were then analyzed using machine-based network analysis and summative content analysis. Results: The analysis examined the responses of 126 participants and led to the identification of six prominent themes. These themes were further classified into three distinct levels: personal, task, and organizational. The identified themes are as follows: "collapse of personal life," "being overwhelmed by the numerous roles required," "personal protective equipment was sufficiently provided, but that is not enough," "changes in interprofessional collaboration," "inappropriate workforce management," and "diverted allocation of healthcare services and resources." Conclusion: Our findings highlight areas for improvement in resources, systems, and policies to enhance preparedness for future pandemics.

• 한국게임학회 논문지
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• 제20권2호
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• pp.113-122
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• 2020

2016년~2019년까지 지능정보기술 관련 콘텐츠 연구를 메타분석한 결과, 관련 기술이 사회적 화두로 부상한 이후 연구가 유의미하게 증가하였으며, 세부 기술과 관련해서는 가상현실 및 증강현실 기술에 대한 관심이 가장 높았다. 특정한 하나의 기술을 넘어 여러 지능정보기술이 콘텐츠와 어떻게 관련되는지가 탐구되는 경향이었다. 게임의 경우 VR 및 AR기술과 관련하여 연구가 많이 이루어졌고, 빅데이터 기술의 경우 영화 콘텐츠 연구에서 주목하는 경향이었다. 지능정보기술에 대한 기술적 접근을 시도한 연구가 많은 편이었으나, 인공지능 기술과 관련해서는 법적, 제도적으로 주로 조망되는 등 기술별, 콘텐츠 분야별로 차이가 나타났다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권8호
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• pp.3856-3872
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• 2018

HTTP-based adaptive streaming (HAS) has recently been widely deployed on the Internet. In the HAS system, a video content is encoded at multiple bitrates and the encoded video content is segmented into small parts of fixed durations. The HAS client requests a video segment and stores it in the playout buffer. The rate adaptation algorithm employed in HAS clients dynamically determines the video bitrate depending on the time-varying bandwidth. Many studies have shown that an efficient rate adaptation algorithm is critical to ensuring quality-of-experience in HAS systems. However, existing algorithms have problems estimating the network bandwidth because bandwidth estimation is performed on the client-side application stack. Without the help of transport layer protocols, it is difficult to achieve accurate bandwidth estimation due to the inherent segment-based transmission of the HAS. In this paper, we propose an alternative approach that utilizes the playout buffer occupancy rather than using bandwidth estimates obtained from the application layer. We start with a queueing analysis of the playout buffer. Then, we present a buffer-aware rate adaptation algorithm that is solely based on the mean buffer occupancy. Our simulation results show that compared to conventional algorithms, the proposed algorithm achieves very smooth video quality while delivering a similar average video bitrate.