• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.77-78
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• 2008

With advent of 3G mobile communication services, video telephony becomes one of the major services. However, due to a narrow channel bandwidth, the current video telephony services have not yet reached a satisfied level. In this paper, we propose an ROI (Region-Of-Interest) based improvement of visual quality for video telephony services with the H.264|MPEG-4 Part 10 (AVC: Advanced Video Coding) codec. To this end, we propose a face detection and tracking method to define ROI for the AVC codec based video telephony. Experiment results show that our proposed ROI based method allowed for improved visual quality in both objective and subjective perspectives.

• 가정과삶의질연구
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• 제33권6호
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• pp.51-63
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• 2015

This study explored the effects of after-school services on whether they reduced the possibility of self-care of children. In terms of characteristics of the use of after-school services, it focused on the 1) types, 2) diversity, and 3) use patterns of the after-school services. For the analysis, it used data of the cohort of elementary-school children from the Korean Children and Youth Panel Survey. The main findings are as follows. First, private mentoring and after-school services provided by welfare centers reduced the possibility of self-care. Second, when the total amount of educational time was controlled, the diversity of participating after-school services did not explain the possibility of self-care. Third, when the total amount of educational time was controlled, the use patterns of after-school services did not explain the possibility of self-care. Based on these findings, it suggested policy implications and future research.

• 한국도서관정보학회지
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• 제50권1호
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• pp.357-380
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• 2019

본 연구의 목적은 2015년 '모든 학생 성공법'에 의해 재인증된 미국의 초중등교육법을 문헌정보 서비스의 관점에서 법률의 내용을 분석하고 이를 통해 문헌정보 서비스 개선 등에 관한 시사점을 도출하는 데 있다. 분석결과, 이 법에는 최초로 '효과적인 학교도서관 프로그램'과 '학교 사서'가 명시되어 있으며 '학교도서관 프로그램'과 '학교 사서'를 리터러시와 디지털 리터러시, 도서, 자원, 최신 자료, 기술, 도서관 서비스 및 교육 서비스와 연계시키고 있어 미국의 초중등학교에서 문헌정보 서비스가 보다 적극적으로 수행될 수 있는 재정적 제도적 기반을 제공하고 있다. 또한, 이 법에는 학교 사서가 개인화된 학습 경험, 증거 기반 평가, 전문성 개발에 참여해야 한다고 명시하고 있으며 학생들의 학업성취도와 리터러시 및 디지털 리터러시 향상을 위하여 학생, 교직원, 학부모에게 문헌정보 서비스를 제공해야 함을 규정하고 있다. 이러한 분석 내용을 바탕으로 본 연구는 학교도서관 접근성 강화, 사서교사 등의 문헌정보 서비스 업무 구체화, 학교 구성원과의 협력 강화, 증거 기반에 따른 교육 활동, 교육적 효과의 공유, 문헌정보 교육과정 개발을 논의하였다.

• International Journal of Contents
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• 제13권1호
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• pp.22-30
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• 2017

The diffusion of advanced mobile technology has introduced new types of personal information or 'location data'. These new data mean new opportunities for businesses, such as location-based services (LBS), but have resulted in new consumer anxieties regarding disclosure of personal information. This study examines the effects of the consumers' perceived control over "time-andplace" information in location-aware services on their perceived privacy risk. A total of 270 respondents participated in this study. Conditions of perceived privacy control were operationalized over time-and-place information, in a $2{\times}2$ factorial design. Results indicate that the perceived control over time-and-place personal information is a significant predictor of perceived risk, and control assurances over time-and-place information enhances the perception of control, thus alleviating the perceived risk. In addition, the effect is much more significant when time and place were combined.

• 대한간호학회지
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• 제42권7호
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• pp.984-991
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• 2012

Purpose: The purpose of this study was to evaluate the effects of a school-based intervention program for middle school adolescent girls with depression. Methods: The study was a pretest-posttest repeated-measure design with a nonequivalent control group. Fifty eight students with depressive symptoms were recruited from two middle schools in Seoul, Korea. The data were collected from the intervention (n=30) and the comparison group (n=28). The research instrument was Reynolds Adolescent Depression Scale. Results: The intervention group greatly improved from baseline to 10 weeks and then saw a slight positive change between 10 and 13 weeks. Conclusion: The results of this research show that depression intervention programs are effective for young female adolescents. Thus the investigation has important school-based treatment implications, and should be integrated into school curriculums by school health nurses for early intervention of depressive symptoms in middle school adolescent girls.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권3호
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• pp.1091-1110
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• 2016

Hybrid deployment under current cloud data centers is a combination of online and offline services, which improves the utilization of the cluster resources. However, the performance of the cluster is often affected by the online services in the hybrid deployment environment. To improve the response time of online service (e.g. search engine), an effective scheduling algorithm based on Storm is proposed. At the component level, the algorithm dispatches the component with more influence to the optimal performance node. Inside the component, a reasonable resource allocation strategy is used. By searching the compressed index first and then filtering the complete index, the execution speed of the component is improved with similar accuracy. Experiments show that our algorithm can guarantee search accuracy of 95.94%, while increasing the response speed by 68.03%.

• 한국병원경영학회지
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• 제23권1호
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• pp.1-15
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• 2018

Recently, the importance of emergency medical services has emerged, as rapid advances in urbanization and industrial development. Accordingly, the need for effective emergency medical services is increasing, and the evaluation of an emergengy medical services centers is conducted to meet these policy needs. The purpose of this study was to analyse the relationship between the structure and the process domain of the evaluation of an emergency medical services center based on the Donabedian's model and to verify the validity as an index of quality evaluation through the results. As a result of the analysis, there were some indicators that showed a different direction than expected, but generally there was a significant correlation between the structure and process domains of the evaluation of an emergency medical services center. This suggests that the process can be improved by improving the structure. In conclusion, as structure and process indicators in evaluation of an emergency medical services center show significant relationship, it can be evaluated as validity as a tool to measure the quality of emergency medical services.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.663-664
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• 2008

With advent of IPTV services and availability of various web contents, users can enjoy various contents via internet. In order to effectively provide a large amount of web contents to users, personalized IPTV services are required to the user's sides. In this paper, we extend the current ATOM schema for personalized IPTV services and propose a IPTV service framework based on IPTV personalization.

• Asia pacific journal of information systems
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• 제27권3호
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• pp.156-175
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• 2017

The proposed conceptual framework is based in the relationships among knowledge of personal information security, trust on the personal information security policies of parcel delivery service companies, privacy concern, trust in and risk of parcel delivery services, and user satisfaction with parcel delivery services. Drawing upon both cognitive theory of emotion and cognitive emotion theory that complement each other, we propose a research model and examine the relationships between cognitive and emotional factors and the usage of parcel delivery services. The proposed model is validated using data from customers who have previously used parcel delivery services. The results show a significant relationship between the cognitive and affective factors and the usage of parcel delivery services. This study enhances our understanding of parcel delivery services based on the consumers' psychological processes and presents useful implications on the importance of privacy and security in these services.

• 정보화연구
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• 제10권2호
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• pp.159-167
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• 2013

Web Services offer many benefits over other types of middleware in distributed computing. However, usage of Web Services results in large network bandwidth since Web Services use XML-based protocol which is heavier than binary protocols. Even though there have been many researches to minimize the network traffic and bandwidth usages of Web Services messages, none of them are solving problem clearly yet. In this paper, we propose a transparent proxy with cache to avoid transfer of repeated SOAP data, sent by Web Service to an application. To maintain the cache consistency, we introduce publish/subscribe paradigm using WS-Eventing between the proxy and Web Service. The implemented system based on our proposed architecture will not compromise the standards of Web Service. The evaluation of our system shows that caching SOAP messages not only reduces the network traffic but also decreases the request delays.