• Journal of applied mathematics & informatics
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• v.27 no.1_2
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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.

• Honam Mathematical Journal
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• v.28 no.4
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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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• v.16 no.6
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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.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.10
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• pp.6647-6654
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• 2015

The purpose of this study was to analysis a Korean version of Satisfaction with Simulation Experience(SSE) Scale by paramedic students. Total number of 111 students majoring in the EMT-paramedic education area have taken part in the survey after completing the professional cardiac resuscitation simulative training, using the standardized simulation satisfaction evaluation method (SSE scale). Through the scale, one's preference, necessity, ACLS theory grade, and satisfaction rate per year regarding the training were measured. To analyze one's preference, necessity, ACLS theory grade, and satisfaction rate per year in regards to the training, one-way ANOVA was used. The result reveals that the overall satisfaction rate was generally quite high. When one's preference and necessity rate is high, the satisfaction rate also seems to increase. The result indicates that the simulation training will enhance the students' clinical skill, patient evaluation, and treatment capability as well as one's field adaptation skill at the time of an emergency occurrence. Eventually, training through the ACLS simulation will be used in the future for the benefit of encouraging students from emergency rescue to adapt to the site of an emergency. Therefore, such an education method should be maintained and further developed.