• Journal of applied mathematics & informatics
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• 제27권1_2호
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• pp.375-384
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• 2009

Characterizations of simulative WFI-algebras are provided. The notion of commutators, doubly simulative parts, doubly simulative WFI-algebras, and WFI-morphisms are introduced. Using the notion of commutators, the conditions for a WFI-algebra to be simulative are given. Characterizations of doubly simulative WFI-algebras are discussed. Using the notion of doubly simulative WFI-algebras, a commutative pomonoid is established.

• 호남수학학술지
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• 제28권4호
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• pp.471-484
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• 2006

The notion of ideals in WFI-algebras is introduced, and several properties are investigated. Relations between a filter and an ideal are given, and characterizations of an ideal are provided. An extension property for an ideal is established.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권6호
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• pp.2094-2114
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• 2022

Due to the wide application of fifth generation communication, wireless sensor networks have become an indispensable part in our daily life. In this paper, we analyze physical layer security for two-way relay with energy harvesting (EH), where power splitter is considered at relay. And two kinds of combined methods, i.e., selection combining (SC) and maximum ratio combining (MRC) schemes, are employed at eavesdropper. What's more, the closed-form expressions for security performance are derived. For comparison purposes, this security behaviors for orthogonal multiple access (OMA) networks are also investigated. To gain deeper insights, the end-to-end throughput and approximate derivations of secrecy outage probability (SOP) under the high signal-to-noise ratio (SNR) regime are studied. Practical Monte-Carlo simulative results verify the numerical analysis and indicate that: i) The secure performance of SC scheme is superior to MRC scheme because of being applied on eavesdropper; ii) The secure behaviors can be affected by various parameters like power allocation coefficients, transmission rate, etc; iii) In the low and medium SNR region, the security and channel capacity are higher for cooperative non-orthogonal multiple access (NOMA) systems in contrast with OMA systems; iv) The systematic throughput can be improved by changing the energy conversion efficiency and power splitting factor. The purpose of this study is to provide theoretical direction and design of secure communication.

• 한국산학기술학회논문지
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• 제16권10호
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• pp.6647-6654
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• 2015

본 연구는 응급구조학과 학생대상 한국판 시뮬레이션 경험 만족도 측정도구 분석을 목적으로 응급구조학과 학생 총 111명을 대상으로 ACLS시뮬레이션 실습교육 후 학생들이 느끼는 만족도를 측정 후 분석하였다. 또한 시뮬레이션 교육에 대한 호감도, 필요성, 전문심장소생술 이론 성적이 시뮬레이션 실습교육 만족도에 미치는 영향 및 상관관계를 확인하고자 한다. 측정된 만족도는 일원배치분산분석을 통하여 분석하였으며, 그 결과 대부분의 학생들이 높은 만족도를 나타냈다. 시뮬레이션 교육에 대한 호감도 및 필요도가 높을수록 만족도 측정도구의 세 가지 요인 모두에서 높게 나타났으나, ACLS이론 성적과 만족도의 상관관계는 성립되지 않았다. 향후 ACSL 시뮬레이션을 통한 교육법은 유지되어야 하며 지속적으로 발전해야 한다.