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Kim Jaiyong,김동욱,김광일,Kim Hong Bin,Kim Jong-Hun,Lee Yong-Gab,변경향,정해관,Korean Society of Hypertension 대한의학회 2020 Journal of Korean medical science Vol.35 No.25
Background: There is a controversy whether it is safe to continue renin-angiotensin system blockers in patients with coronavirus disease 2019 (COVID-19). We analyzed big data to investigate whether angiotensin-converting enzyme inhibitors and/or angiotensin II receptor blockers have any significant effect on the risk of COVID-19. Population-based cohort study was conducted based on the prescription data from nationwide health insurance records. Methods: We investigated the 1,374,381 residents aged ≥ 40 years living in Daegu, the epicenter of the COVID-19 outbreak, between February and March 2020. Prescriptions of antihypertensive medication during the year before the outbreak were extracted from the National Health Insurance Service registry. Medications were categorized by types and stratified by the medication possession ratios (MPRs) of antihypertensive medications after controlling for the potential confounders. The risk of COVID-19 was estimated using a difference in difference analysis. Results: Females, older individuals, low-income earners, and recently hospitalized patients had a higher risk of infection. Patients with higher MPRs of antihypertensive medications had a consistently lower risk of COVID-19 than those with lower MPRs of antihypertensive medications and non-users. Among patients who showed complete compliance, there was a significantly lower risk of COVID-19 for those prescribed angiotensin II receptor blockers (relative risk [RR], 0.751; 95% confidence interval [CI], 0.587–0.960) or calcium channel blockers (RR, 0.768; 95% CI, 0.601–0.980). Conclusion: Renin-angiotensin system blockers or other antihypertensive medications do not increase the risk of COVID-19. Patients should not stop antihypertensive medications, including renin-angiotensin system blockers, because of concerns of COVID-19.
개인 건강정보의 일차적 활용과 이차적 활용 : 사회적 맥락과 거버넌스 확립 문제
김재용(Jaiyong Kim) 이화여자대학교 생명의료법연구소 2020 Asia Pacific Journal of Health Law & Ethics Vol.13 No.2
지난 2020년 1월 9일 국회 본회의에서 개인정보 3법이 통과되었다. 하지만 용어 정의와 해석에 서 많은 오해와 오보가 나타나고 있다. 가명정보는 분명 개인정보보호의 대상이며 설사 가명화가 되 었다 하더라도 통계작성, 과학적 연구, 공익적 기록보존 등의 목적을 위해서만 정보주체의 동의 없이 처리·활용할 수 있다. 상업적 활용을 엄격히 규제하는 최근의 국제적 추세와 반대로, 개정된 법은 과 학적 방법을 쓰기만 하면 민간투자 연구도 과학적 연구라고 규정함으로써 오히려 사회적 논란과 불확 실성을 높이고 신뢰 기반을 약화하는 심각한 문제를 발생시키고 있다. 특히 민감정보인 개인 건강정 보 활용의 대전제는 개인의 권리와 이익이며 이를 보장할 수 있는 안전한 사회적 시스템을 구축해야 한다. 이를 위해서는 우선 개인 건강정보의 사용 목적과 범위에 대한 공론의 장을 열어야 한다. 국민 의 안전과 서비스 질 문제 해결이라는 일차적 목적 및 이에 종속된 이차적 목적을 추구할 수 있는 투 명한 시스템이 필요하다. 또한 건강 빅데이터가 운영되는 정보통신기술 환경을 실질적으로 관리할 수 있는 안전한 감독체계를 만들어야 한다. The Personal Information 3 Acts was passed at a plenary session of the National Assembly on January 9, 2020. However, there are many misunderstandings and incorrect reports in terms of definition and interpretation. Pseudonymized data are definitely subject to personal information protection, and, they can be processed and used without consent from the information subjects only for the purposes of statistical writing, scientific research, and preservation of public records. Contrary to the recent international trend of strictly regulating commercial use, the revised law has defined private investment research as scientific research as long as scientific methods are used. This rather raises social controversy and uncertainty and creates serious problems that weaken the credibility base. In particular, the premise of utilizing personal health information, which is sensitive information, is individual rights and interests. A safe social system should be established to ensure this. To this end, we must first open a forum for public debate on the purpose and scope of the use of personal health information. A transparent system is needed to pursue the primary purpose of addressing the safety and quality of service issues of the people and the secondary purpose subordinate to it. We should also create a secure supervisory system that can practically manage the information and communication technology environment in which health big data is run.
End to End ZigBee Home Network Security Solutions
Changguk Lee,Jaiyong Lee,Woochool Park,Mynghyun Yoon,Sunghyun Yang 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
ZigBee home network service is expected to fill every aspect of our lives and play increasingly important roles. ZigBee is designed to support low cost and battery powered applications. So ZigBee nodes have small memory and insufficient computation capability to support heavy data handling. In this paper, we presents a systematic analysis of the threats faced by IEEE 802.15.4 and the ZigBee Alliance. Attack scenarios are models and their impacts are evaluated. Some security problems within the current ZigBee security architecture are identified and remedies are suggests. And countermeasures of various attacks are also given. Most of the solutions are implemented in the Security Server. And ZigBee nodes have a few security handling capability.
Fault Tolerant Lightweight flooding algorithm in Wireless Sensor Networks
Changguk Lee,Jaiyong Lee 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
In the large scale wirless networks each node has heavy route error state. To improve ene to end successful transferred packet rates, we propose fault tolerant lightweight flooding algorithm(LWF). LWF reduces energy consumption using Region Master(RM) compared with general flooding scheme. And LWF also improves end to end delay compared with on-demand routing schemes.
Interference-Aware Downlink Resource Management for OFDMA Femtocell Networks
( Hyunduk Jung ),( Jaiyong Lee ) 한국인터넷정보학회 2011 KSII Transactions on Internet and Information Syst Vol.5 No.3
Femtocell is an economical solution to provide high speed indoor communication instead of the conventional macro-cellular networks. Especially, OFDMA femtocell is considered in the next generation cellular network such as 3GPP LTE and mobile WiMAX system. Although the femtocell has great advantages to accommodate indoor users, interference management problem is a critical issue to operate femtocell network. Existing OFDMA resource management algorithms only consider optimizing system-centric metric, and cannot manage the co-channel interference. Moreover, it is hard to cooperate with other femtocells to control the interference, since the self-configurable characteristics of femtocell. This paper proposes a novel interference-aware resource allocation algorithm for OFDMA femtocell networks. The proposed algorithm allocates resources according to a new objective function which reflects the effect of interference, and the heuristic algorithm is also introduced to reduce the complexity of the original problem. The Monte-Carlo simulation is performed to evaluate the performance of the proposed algorithm compared to the existing solutions.
Comparison of symmetric and asymmetric routing for fixed two-hop cellular relaying network
Eunhyun Kwon,Jaiyong Lee,Mi-Sun Do,Kyunghun Jung IEEE 2007 IEEE communications letters Vol.11 No.5
<P>In this paper, routing strategies for fixed two-hop cellular relaying networks are discussed in terms of area spectral efficiency. We consider symmetric and asymmetric routing in uplink and downlink. Simulation results show that relaying increases the average throughput in comparison with conventional cellular networks and the area spectral efficiency of asymmetric routing is slightly better than that of the symmetric</P>
Analysis Model for the Transport Delay of NAK-based SR-ARQ with a Finite Retransmission
Jechan Han,Jaiyong Lee 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, we propose a simple analysis model for the transport delay of the negative acknowledgment (NAK)-based selective repeat automatic repeat request (SR-ARQ). We define the transport delay as the time from a packet’s first transmission until its successful arrival at the receiver. By analyzing the transport delay, we can evaluate the efficiency of SR-ARQ’s loss recovery procedures as well as its delay performance. Particularly, the model considers the traffic condition and a finite retransmission persistence of SR-ARQ as well as the packet loss rate over a wireless link. Finally, the analysis model’s accuracy is verified by the simulation results.