scholarly journals Network-Coding-based Jamming With Triple Transmission Time Slots: A Method To Secure Transmission In An Extreme Case of Source-Wiretapping and Unshared Jamming Signal

2021 ◽  
Vol 8 (27) ◽  
pp. 170242
Author(s):  
Truc Tran
Keyword(s):  
Network Coding ◽  
Extreme Case ◽  
Transmission Time ◽  
Secure Transmission

A Generic Secure Transmission Scheme Based on Random Linear Network Coding

2021 ◽  
pp. 1-12
Author(s):  
Renyong Wu ◽  
Jieming Ma ◽  
Zhixiang Tang ◽  
Xiehua Li ◽  
Kim-Kwang Raymond Choo
Keyword(s):  
Network Coding ◽  
Transmission Scheme ◽  
Linear Network ◽  
Linear Network Coding ◽  
Random Linear Network Coding ◽  
Secure Transmission

Network Coding Assisted Secure Transmission in Full-Duplex Relay Networks

2020 ◽  
Vol 69 (8) ◽  
pp. 9196-9200
Author(s):  
Hongliang He ◽  
Shanxiang Lyu ◽  
Qinghao He ◽  
Dongyang Xu
Keyword(s):  
Network Coding ◽  
Relay Networks ◽  
Full Duplex ◽  
Secure Transmission ◽  
Full Duplex Relay

scholarly journals Investigation of error performance in OFDM with network coding techniques in multiple relay networks

2020 ◽  
Vol 71 (3) ◽  
pp. 185-194
Author(s):  
Ngu War Hlaing ◽  
Ali Farzamnia ◽  
Manas Kumar Haldar ◽  
Liau Chung Fan
Keyword(s):  
Network Coding ◽  
Error Rate ◽  
Turbo Codes ◽  
Transmission Time ◽  
Rate Performance ◽  
Ofdm System ◽  
Error Performance ◽  
Simulation Results ◽  
Multiple Relay ◽  
Ber Performance

AbstractThe aim of this paper proposes an orthogonal frequency-division multiplexing (OFDM) with network coding to improve the error performance of the system when the messages are transmitted from user to receiver. Two-way relay (TWR) networks are applied to reduce the transmission time slots. The exclusive-OR (XOR) coding is used for network coding in which source nodes exchange their information via TWR nodes. The XOR coded bits provides redundancy to achieve the transmit diversity gain which improves the error performance of the TWR network. OFDM is exploited for TWR to obtain the frequency selective fading nature of wireless channels. The different modulation schemes such as Quadrature Phase Shift Keying (QPSK), 16-Quadrature Amplitude Modulation (QAM) and 64-QAM with OFDM system are simulated and QPSK is selected as it gives the lowest bit error rate (BER). The multiple relaying schemes with different numbers of the information packets are also considered in this paper. Simulation results show that multiple relay schemes provide faster transmission time and better error rate performance. Moreover, different kinds of channel coding schemes such as Convolutional, Reed-Solomon (RS) and turbo codes are applied in OFDM system with network coding to compare and evaluate the BER performance of the proposed system. From the simulation results, network coded OFDM scheme with turbo codes give better BER performance for given Signal-to-Noise Ratio (SNR) in relaying scheme with different numbers of information packets compared to those of convolutional and RS codes. It shows that, the error rate performance and transmission time is reduced 10 percent than the conventional scheme at even at low SNR value.

Quality of Governance at the Communal Level in Poland: an Exploratory Study of the Worst Performer Case From the Opolskie Province

2020 ◽  
Vol 21 (1) ◽  
pp. 22-55
Author(s):  
Bartosz Czepil
Keyword(s):  
Exploratory Study ◽  
Quality Index ◽  
Extreme Case ◽  
Quality Level ◽  
Case Method ◽  
Major Conclusion ◽  
Second Stage ◽  
Quality Of Governance ◽  
Governance Quality

The objective of this paper is an attempt to explain the determinants of the lowest governance quality level in one of the communes of the Opolskie Province, Poland. The first stage of the research consisted in developing a commune-level governance quality index in order to measure the quality of governance in the 60 communes of the Opolskie Province. Subsequently, the commune with the lowest score in the index was qualified for the second stage of the research which was based on the extreme case method. The major conclusion from the research is that the commune leader's governance style which allowed him to hold on to power for many terms of office was responsible for generating low governance quality. Furthermore, the low quality of governance was not only the effect of the governance style but also the strategy aimed at remaining in the commune leader office for many terms.

Accounts of consent: Orienting to self-other relations regarding motivations to participate in cancer bio-banking

2015 ◽  
Vol 11 (1) ◽  
pp. 69-84 ◽  
Author(s):  
Hannah Shipman ◽  
Srikant Sarangi ◽  
Angus J. Clarke
Keyword(s):  
Reflective Practice ◽  
Extreme Case ◽  
The Self ◽  
Case Formulation ◽  
Contrast Structure ◽  
Self And Other ◽  
Clinical Encounters ◽  
Rhetorical Discourse ◽  
Motivation To Participate ◽  
Significant Factors

The motivations of those who give consent to bio-banking research have received a great deal of attention in recent years. Previous work draws upon the notion of altruism, though the self and/or family have been proposed as significant factors. Drawing on 11 interviews with staff responsible for seeking consent to cancer bio-banking and 13 observations of staff asking people to consent in routine clinical encounters, we investigate how potential participants are oriented to, and constructed as oriented to, self and other related concerns (Author 2007). We adopt a rhetorical discourse analytic approach to the data and our perspective can be labelled as ‘ethics-in-interaction’. Using analytic concepts such as repetition, extreme case formulation, typical case formulation and contrast structure, our observations are three-fold. Firstly, we demonstrate that orientation to ‘general others’ in altruistic accounts and to ‘self’ in minimising burden are foregrounded in constructions of motivation to participate in cancer bio-banking across the data corpus. Secondly, we identify complex relational accounts which involve the self as being more prominent in the consent encounter data where the staff have a nursing background whereas ‘general others’ feature more when the staff have a scientific background. Finally, we suggest implications based on the disparities between how participants are oriented in interviews and consent encounters which may have relevance for developing staff’s reflective practice.

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