• Proceedings of the Korean Society for Information Management Conference
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• 2013.08a
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• pp.83-87
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• 2013

본 연구는 국내 D-Space 기반의 11개 리포지터리에 구축된 콘텐츠 현황을 두가지 관점에서 조사하고 분석하였다. 각 리포지터리에 구축된 콘텐츠의 더블린코어(DC) Type 유형을 추출하여 그 현황을 조사하였으며, 2,500여 콘텐츠들을 무작위 샘플링하여 원문 구축현황 및 유형을 살펴보았다. 그 결과 각 리포지터리에는 표준화되지 않은 다양한 Type 유형을 자체적으로 사용하고 있었으며, 원문을 제공하는 방식 또한 다양하게 나타났다. 이에 본 연구에서는 각 기관별로 사용하는 39가지의 Type 유형을 9개 유형으로 병합한 기준을 제시하고, 향후 리포지터리 콘텐츠를 수집하는 측면에서 품질관리 정책 수립을 위한 제언과 시스템 구축을 위한 워크플로우를 제시하였다.

• Journal of the Korean Society of Radiology
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• v.83 no.4
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• pp.776-782
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• 2022

Burnout among radiologists has recently emerged as an issue that poses a threat to patient safety. Burnout adversely effects the quality of patient care and may lead to health problems in physicians. Approximately 84% of board-certified radiologists working in large hospitals in Korea responded that they had experienced burnout at least once. To overcome this, the standardization of physicians' workloads, as well as improvements in the professional workflow are necessary to ensure a healthy lifestyle balance.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.3
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• pp.22-33
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• 2014

As a standard of WMNs, IEEE 802.11s supports two kinds of MAC algorithm: a mandatory EDCA used by IEEE 802.11e and an optional MCCA. While EDCA classifies traffic according to four Access Categories (AC) and offer differentiated service using a classified priority, MCCA can guarantee the specific bandwidth of users with a TDMA-style bandwidth reservation scheme between mesh routers. In case that a flow is VBR traffic of a multimedia application, MCCA has disadvantage that the reserved bandwidth does not be used entirely, though it guarantees required bandwidth of users and fairness using bandwidth reservation with neighbors' node. In this paper, we showed a problem that is wastes the reserved bandwidth when MCCA is enabled and proposed a new scheduling algorithm to prevent waste of bandwidth and to improve network utilization effectively, named Resource Sharing Round Robin (RSRR) scheduling. Finally we showed simulation results that performance of a proposed RSRR is better than the legacy MCCA through NS-2 simulation.

• Korean Journal of Construction Engineering and Management
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• v.9 no.6
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• pp.194-203
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• 2008

Construction companies require management system to increase efficiency and profit because of receiving competition and globalizing business environment. Since 1990s, construction companies have made various attempts to innovate business structure both internally and externally by means of BPR, 6 Sigma, PI, and Workflow. Some improvements were made, but most of them were temporary, and insufficient to provide the much-needed promptness of business process in responding to the changes. Furthermore, the recent methods of applying BPM and practical using are limited to the theory and method of other industries, and also the attempts of applying BPM in construction industry are at the stage of theoretical approaching and examining in a few construction companies. Accordingly, this study deduces the necessity of adopting BPM based on change of business paradigm for construction companies and limits of current researches, failure causes and problems of application attempts of BPM and process management. And also, we analyze Advance of BPM and suggest the application method of business process management model for construction companies.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06d
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• pp.149-152
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• 2011

본 논문에서는 무선 메쉬 네트워크에서 H.264 비디오 코딩을 이용한 대화형 멀티미디어 전송시 서비스 품질을 향상시키기 위한 Early Drop 기법을 제안한다. Early Drop 기법은 비디오 프레임의 재생시간과 H.264로 부호화된 비디오 프레임의 중요도를 고려하여 네트워크 혼잡 시 발생하는 큐잉 지연과 큐 오버플로우로 인한 비디오 서비스 품질 저하를 효과적으로 개선하기 위해 개발되었다. 계층간 최적화(Cross-Layer)기법을 사용하여 각 비디오 패킷 별로 재생시간까지 남은 시간을 의미하는 delay budget을 할당하고 전송 중 재생시간 초과로 인해 목적지 노드에서 재생되지 못하는 비디오 패킷을 전송 초기 손실 시켜 무선대역폭 낭비와 전송 지연을 최소화 한다. 또한, H.264 비디오 프레임 종류별 중요도를 고려하여 차별화 된 delay budget을 할당해 중요도가 높은 비디오 프레임의 전송을 보장하여 비디오 전송 품질을 높인다. 성능 검증을 통해 네트워크 혼잡 시 Early Drop 기법은 기존에 제안된 IEEE 802.11e 기반의 H.264 비디오 전송기법과 비교하여 전송지연과 프레임 손실률을 최소화해 향상된 비디오 품질을 보였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.641-643
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• 2021

The Internet of Things (IoT) connects all markets and industries, enabling new business models for a variety of services and service providers. The Internet of Medical Things (IoMT) not only accelerates medical advances, but also enables treatment with a more human approach. In addition, it improves treatment methods and quality of precision medical care through data, enables timely treatment, and improves operational productivity of medical institutions through a simplified workflow. However, since the medical field directly affects human health and life, securing security has become an issue above all else, and is a target for hackers trying to exploit it. Therefore, in this study, IoMT technology and security threats and countermeasures in the medical field are analyzed.

• KNOM Review
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• v.15 no.1
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• pp.31-39
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• 2012

오늘날 네트워크 환경은 다양한 응용의 등장으로 트래픽이 복잡 다양해지고 있다. 이러한 상황 속에서 정확한 네트워크의 상태 파악을 위한 트래픽의 응용 별 분류에 대한 중요성은 더욱더 증가하고 있다. 최근 트래픽 플로우의 통계 정보를 이용한 트래픽의 응용 별 분류 방법론에 대한 연구가 활발히 진행되고 있다. 하지만 대부분의 연구들은 TCP 세션의 이상 동작에 대한 고려가 없어 분류결과의 오분류 및 미분류가 발생할 수 있다. 따라서 본 논문에서는 TCP 세션의 이상동작의 문제점을 지적하고 이를 개선하는 방법론을 제안한다. 제안된 방법론을 통계적 응용 트래픽 분류방법에 적용함으로써 그 타당성을 증명한다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.23 no.3
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• pp.48-66
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• 2024

According to the three amended Laws of the Data Economy and the Data Industry Act of Korea, systems for pseudonymous data integration and Data Safe Zones have been operated separately by selected agencies, eventually causing a burden of use in SMEs, startups, and general users because of complicated and ineffective procedures. An over-stringent pseudonymization policy to prevent data breaches has also compromised data quality. Such trials should be improved to ensure the convenience of use and data quality. This paper proposes a prototype system of the Integrated Data Safe Zone based on redesigned and optimized pseudonymization workflows. Conventional workflows of pseudonymization were redesigned by applying the amended guidelines and selectively revising existing guidelines for business process redesign. The proposed prototype has been shown quantitatively to outperform the conventional one: 6-fold increase in time efficiency, 1.28-fold in cost reduction, and 1.3-fold improvement in data quality.

• Journal of the Korean Society of Radiology
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• v.17 no.6
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• pp.939-945
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• 2023

This study analyzes the 'performance efficiency' of AI-based reading assistance systems in the field of radiology by measuring their 'time behavior' properties. Due to the increase in medical images and the limited number of radiologists, the adoption of AI-based solutions is escalating, stimulating a multitude of studies in this area. Contrary to the majority of past research which centered on AI's diagnostic precision, this study underlines the significance of time behavior. Using 50 chest X-ray PA images, the system processed images in an average of 15.24 seconds, demonstrating high consistency and reliability, which is on par with leading global AI platforms, suggesting the potential for significant improvements in radiology workflow efficiency. We expect AI technology to play a large role in the field of radiology and help improve overall healthcare quality and efficiency.

• Journal of KIISE:Information Networking
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• v.31 no.5
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• pp.469-481
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• 2004

Previous works for the AF(Assured Forwarding) service in the Diffserv network have no sufficient consideration on the fairness of bandwidth share based on RTTs, the target rates, and the impact of UDP against TCP. In this paper, in order to solve these problems, we propose a FDSA(Fair Differentiated Service Architecture) composed of TRA3CM(Target rate and RTT Aware 3 Color Marking) and TRBD(Target Rate Based Dropping) mechanisms. The TRA3CM and TRBD mechanisms provide three color marking and fair transmission rates among aggregate flows by considering RTT, target rate, and UDP flows simultaneously. In the results of comparing the performance among existing mechanisms and the TRA3CM-TRBD, the TRA3CM-TRBD mechanism was able to mitigate the RTT and UDP effect better than the former. The TRA3CM-TRBD is shown to provide good performance for transmission rates proportional to various target rates.