• 대한의용생체공학회:의공학회지
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• 제30권6호
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• pp.510-515
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• 2009

In this paper, variable characteristic ratio algorithm based on oscillometric method is proposed to enhance the accuracy of blood pressure measurement. We combined the slope-based approach and fuzzy inference technique to change the characteristic ratios of height-based method. The proposed algorithm was assessed on 255 measurements from 85 subjects and compared with the conventional height-based algorithm. The testing results showed that the developed algorithm achieved an overall grade A for both systolic and diastolic blood pressures according to the BHS protocol. And, mean standard deviation between the observers and the developed algorithm were 5.71mmHg and 6.29mmHg for systolic and diastolic pressures respectively, which also fulfilled the AAMI criteria. In conclusion, this algorithm was successfully developed and recommended for further clinical trials with the wider adult population.

• BMB Reports
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• 제46권7호
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• pp.335-337
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• 2013

Scientists planning research that involves the use of animals are required by international and/or national law to examine the possibilities for the implementation of Replacement, Reduction and/or Refinement (the Three Rs principles of Russell and Burch) in experiments for research, testing, and education. There are two Korean laws legislating humane use of animals and ethical review prior to animal experiments. This report reviews current practice of the literature search by the researchers and protocol review by the Institutional Animal Care and Use Committees on the Replacement, Reduction and Refinement alternatives in Korea. The promotion and protection of the laboratory animals are one of the core competencies of investigators exploring the ethical conduct of research and good science.

• Structural Monitoring and Maintenance
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• 제6권4호
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• pp.269-289
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• 2019

This study investigated experimentally the response of thick reinforced concrete specimens having hollow cores with critical parameters. The investigation includes testing of twelve specimens that are solid and hollow-core slab models. Each specimen consists of two pieces, the piece dimensions are (1.2 m) length, (0.3 m) width and (20 cm) thickness tested under both monotonic and repeated loading. The test program is carried out to study the effects of load type, core diameters, core shape, number of cores, and steel fiber existence. Load versus deflection at mid span, failure modes, and crack patterns were obtained during the test. The test results showed that core shape and core number has remarkable influenced on cracking pattern, ultimate load, and failure mode. Also, when considering repeated loading protocol, the ultimate load capacity, load at yielding, and ductility is reduced.

• Industrial Engineering and Management Systems
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• 제10권4호
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• pp.264-271
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• 2011

It is necessary for humans who have been facing environmental problems to build a sustainable society in which economic activities coexist with nature. To realize such goals, it is essential to promote and enhance environmental education, and to raise global awareness of environmental issues. As a preceding study, a board game "Ecopoly" based on the Kyoto protocol and the estate dealings game, was developed and the validity of environmental education was verified. This study further aims to develop a computer game "Ecopoly", based on the board game which enables us to learn the relationship between environmental problems and economic activities, and to learn more about environmental problems. This computer game enables to concentrate on it by automatic complicated calculations, and to get a higher visual effect compared with the board game. Experimental testing of the game was conducted with 13 college student subjects, and the validity of the game was verified.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2663-2665
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• 2003

본 논문에서는 전력선 환경이 CSMA/CA MAC 프로토콜의 성능에 미치는 영향을 분석한다. 이를 위해 전력선 환경의 특징이 분석되고, 이를 반영할 수 있는 테스트 베드를 구축한다. 테스트 베드를 통해 전력선 환경의 특성을 나타내는 패킷에러율을 구하고, 이를 이용해 CSMA/CA MAC 프로토콜의 성능을 분석한다. CSMA/CA MAC 프로토콜의 성능 분석을 위해 본 논문에서는, 시스템 모델을 제안하고, 시스템 모델로부터 성능 평가 요소인 패킷전송률과 패킷지연시간을 구한다. 마지막으로 수학적 결과를 통해 CSMA/CA MAC 프로토콜의 성능에 전력선 환경이 미치는 특징을 알아보고, 이를 개선할 수 있는 방법들이 논의된다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2002년도 춘계학술발표논문집 (하)
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• pp.1587-1590
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• 2002

차세대 네트워크 및 서비스를 위한 프로토콜로 IETF (Internet Engineering Task Force)의 SIP (Session Initiation Protocol)가 각광을 받고 있다. SIP는 PC, PDA, IP Phone과 같은 VoIP (Voice over IP) 단말간에 호 설정 프로토콜로 사용된다. SIP는 기본적으로는 양 단말간 호설정 프로토콜이지만 응용, 인터넷 단말기, 네트워크 장치에 구성요소로 구성할 수 있어 쉽게 적용 가능하기 때문에 모든 응용의 호설정 프로토콜로서 넓게 채택되어지고 있다. 그러나 SIP는 텍스트 기반 프로토콜로서 구현은 쉬우나 실제 표준에 맞게 구현하였는지는 판단하기가 어렵다. 따라서 구현된 SIP 프로토콜이 표준에 맞게 구현하였는지를 시험할 필요가 있다. 이를 해결하기 위해서, 본 논문에서는 SIP 시뮬레이터를 구현하였다. SIP 시뮬레이터는 구현된 SIP 제품을 인터넷상에서 시험할 수 있을 뿐만 아니라 시험 시나리오를 선택할 수 있고, 시험 과정을 그래픽하게 볼 수 있으며, 시험 결과를 확인할 수 있다. SIP 시뮬레이터는 사용자 인터페이스인 Testing User Agent와, 테스트 시나리오를 수행하는 Test Server로 구성된다. 사용자 인터페이스는 모든 플랫폼에 적용 가능한 Java를 사용하였으며, Test Server는 Linux 환경하에서 C++을 사용하여 구현하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
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• pp.540-543
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• 2003

This paper presents design and manufacture of RF type non-contact radiological dosage measuring device. It also concerns on the broad out-line and the ways of improvement about RF type non-contact radiation measuring device. Measuring radiological dosage with non-contact RF, the stability and efficiency of the measure have been improved by reforming constant current circuit. Furthermore, applying communication protocol in process makes it possible to achieve faster and more accurate communication than old circuit. On the base of those, RF type non-contact radiological dosage measuring device which consists of radiological dosage measuring module and Reader module has been designed and manufactured. While testing communication against embodied device, the possibility of the field application could be confirmed.

• 수면정신생리
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• 제28권1호
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• pp.2-5
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• 2021

Hyperarousal or increased brain excitability is thought to play a key role in the pathophysiology of insomnia. Neuromodulation techniques are emergent complementary therapies for insomnia and can improve sleep by modulating cortical excitability. A growing body of literature support the idea that neuromodulation can be effective in improving sleep or treating insomnia. Recent evidence has revealed that neuromodulation methods can improve objective and subjective sleep measures in individuals with insomnia, although effects vary according to protocol. Different mechanisms of action might explain the relative efficacy of neuromodulation techniques on sleep outcomes. Further research testing different stimulation parameters, replicating existing protocols, and adding standardized sleep-related outcomes could provide further evidence on the clinical utility of neuromodulation techniques.

• 4차산업연구
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• 제2권2호
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• pp.25-37
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• 2022

Purpose - The purposes of this research are: (1) Building and testing a research model that integrates Theory of Reasoned Action (TRA) with fear, perceived risk, and health protocols; (2) Examining the impact of compliance with health protocols on consumer behavior when offline shopping. Research design, data, and methodology - The data collection uses the self-administered survey method, and the questionnaire is distributed online. A total of 504 Indonesian population aged 18 years old or more participate in this research. Data are analyzed using factor analysis, multiple regression, and multiple regression with interaction. Result - This study reveals several findings: (1) Attitude and subjective norm have a significant effect on offline shopping behavior; (2) fear has a direct and indirect effect on offline shopping behavior; (3) the effect of perceived risk on the intensity of offline shopping is determined by compliance with health protocols. Conclusion - This paper discusses the direct influence of attitudes and subjective norms on behavior. This research also integrates fear, perceived risk, and health protocol factors in TRA, which may not have been done much, especially in the COVID-19 pandemic context.

• International Journal of Computer Science & Network Security
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• 제24권4호
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• pp.170-178
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• 2024

Through the growth of the fifth-generation networks and artificial intelligence technologies, new threats and challenges have appeared to wireless communication system, especially in cybersecurity. And IoT networks are gradually attractive stages for introduction of DDoS attacks due to integral frailer security and resource-constrained nature of IoT devices. This paper emphases on detecting DDoS attack in wireless networks by categorizing inward network packets on the transport layer as either "abnormal" or "normal" using the integration of machine learning algorithms knowledge-based system. In this paper, deep learning algorithms and CNN were autonomously trained for mitigating DDoS attacks. This paper lays importance on misuse based DDOS attacks which comprise TCP SYN-Flood and ICMP flood. The researcher uses CICIDS2017 and NSL-KDD dataset in training and testing the algorithms (model) while the experimentation phase. accuracy score is used to measure the classification performance of the four algorithms. the results display that the 99.93 performance is recorded.