Displaying publications 61 - 80 of 522 in total

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  1. Nerve communication model by bio-cells and optical dipole coupling effects
    Zainol FD, Thammawongsa N, Mitatha S, Ali J, Yupapin P
    Artif Cells Nanomed Biotechnol, 2013 Dec;41(6):368-75.
    PMID: 23305176 DOI: 10.3109/21691401.2012.759124
    A novel design of nerve communications and networks using the coupling effects between bio-cells and optical dipoles is proposed. The electrical signals are coupled to the dipoles and cells which propagate within the optical networks for long distance without any electromagnetic interference. Results have shown that the use of optical spins in the spin networks, referred as Spinnet, can be formed. This technique can be used to improve the nerve communication performance. It is fabricated as a nano-biotic circuit system, and has great potential for future disability applications and diagnosis of the links of nerves across the dead cells.
    Matched MeSH terms: Cell Communication*
  2. Fulltext Cryptanalysis and Improvement of "A Secure Password Authentication Mechanism for Seamless Handover in Proxy Mobile IPv6 Networks"
    Alizadeh M, Zamani M, Baharun S, Abdul Manaf A, Sakurai K, Anada H, et al.
    PLoS One, 2015;10(11):e0142716.
    PMID: 26580963 DOI: 10.1371/journal.pone.0142716
    Proxy Mobile IPv6 is a network-based localized mobility management protocol that supports mobility without mobile nodes' participation in mobility signaling. The details of user authentication procedure are not specified in this standard, hence, many authentication schemes have been proposed for this standard. In 2013, Chuang et al., proposed an authentication method for PMIPv6, called SPAM. However, Chuang et al.'s Scheme protects the network against some security attacks, but it is still vulnerable to impersonation and password guessing attacks. In addition, we discuss other security drawbacks such as lack of revocation procedure in case of loss or stolen device, and anonymity issues of the Chuang et al.'s scheme. We further propose an enhanced authentication method to mitigate the security issues of SPAM method and evaluate our scheme using BAN logic.
    Matched MeSH terms: Computer Communication Networks*
  3. Fulltext Receiver-Based Ad Hoc On Demand Multipath Routing Protocol for Mobile Ad Hoc Networks
    Al-Nahari A, Mohamad MM
    PLoS One, 2016;11(6):e0156670.
    PMID: 27258013 DOI: 10.1371/journal.pone.0156670
    Decreasing the route rediscovery time process in reactive routing protocols is challenging in mobile ad hoc networks. Links between nodes are continuously established and broken because of the characteristics of the network. Finding multiple routes to increase the reliability is also important but requires a fast update, especially in high traffic load and high mobility where paths can be broken as well. The sender node keeps re-establishing path discovery to find new paths, which makes for long time delay. In this paper we propose an improved multipath routing protocol, called Receiver-based ad hoc on demand multipath routing protocol (RB-AOMDV), which takes advantage of the reliability of the state of the art ad hoc on demand multipath distance vector (AOMDV) protocol with less re-established discovery time. The receiver node assumes the role of discovering paths when finding data packets that have not been received after a period of time. Simulation results show the delay and delivery ratio performances are improved compared with AOMDV.
    Matched MeSH terms: Computer Communication Networks*
  4. Fulltext Pliable Cognitive MAC for Heterogeneous Adaptive Cognitive Radio Sensor Networks
    Al-Medhwahi M, Hashim F, Ali BM, Sali A
    PLoS One, 2016;11(6):e0156880.
    PMID: 27257964 DOI: 10.1371/journal.pone.0156880
    The rapid expansion of wireless monitoring and surveillance applications in several domains reinforces the trend of exploiting emerging technologies such as the cognitive radio. However, these technologies have to adjust their working concepts to consider the common characteristics of conventional wireless sensor networks (WSNs). The cognitive radio sensor network (CRSN), still an immature technology, has to deal with new networks that might have different types of data, traffic patterns, or quality of service (QoS) requirements. In this paper, we design and model a new cognitive radio-based medium access control (MAC) algorithm dealing with the heterogeneous nature of the developed networks in terms of either the traffic pattern or the required QoS for the node applications. The proposed algorithm decreases the consumed power on several fronts, provides satisfactory levels of latency and spectrum utilization with efficient scheduling, and manages the radio resources for various traffic conditions. An intensive performance evaluation is conducted to study the impact of key parameters such as the channel idle time length, node density, and the number of available channels. The performance evaluation of the proposed algorithm shows a better performance than the comparable protocols. Moreover, the results manifest that the proposed algorithm is suitable for real time monitoring applications.
    Matched MeSH terms: Computer Communication Networks*
  5. Fulltext Effective communication barriers in clinical teaching among Malaysian medical students in Zagazig Faculty of Medicine (Egypt)
    Abass MA, Said NS, Zahed ES, Hussein WF, Hamid OI
    Electron Physician, 2015 Dec;7(8):1638-43.
    PMID: 26816591 DOI: 10.19082/1638
    INTRODUCTION: Effective communication in a clinical environment plays a vital role in patient assessment and treatment. The aim of this study was to understand the experiences of Malaysian medical students concerning communication barriers during clinical practice. The goal was to provide answers for three important research questions, i.e., 1) Are communication barriers an impediment to Malaysian students during clinical teaching? 2) What is the nature of the language barriers that the students encounter? and 3) What are the best ways of reducing these barriers during clinical teaching?
    METHODS: The qualitative method was used to conduct the research, and open-ended questionnaires were used to collect the data. The study was conducted on 95 fourth-, fifth-, and sixth-year students, 80% of whom completed the study.
    RESULTS: Medical students from Malaysia who have limited knowledge of the Arabic language experience some difficulties in communicating with staff members, patients, and nurses during their clinical practices.
    CONCLUSION: Successful orientation of students to the language used in the clinical environment will help the students overcome the communication barriers they encounter during their clinical practices.
    KEYWORDS: Arabic language; Malaysia; clinical environment; communication barriers; medical students
    Matched MeSH terms: Communication*
  6. Fulltext Peers as recruiters: family planning communications of West Malaysian acceptors
    Verbrugge LM
    J Health Soc Behav, 1978 Mar;19(1):51-68.
    PMID: 649939 DOI: 10.2307/2136322
    Matched MeSH terms: Communication*
  7. The correlation between frequency of playing online games and teen communication on nursing students in STIKes Muhammadiyah Palembang
    Aristoteles, Rini PS, Poddar S
    Enferm Clin, 2020 06;30 Suppl 5:1-5.
    PMID: 32713543 DOI: 10.1016/j.enfcli.2019.11.014
    BACKGROUND: Communication in adolesencest is an interpersonal interaction that use symbolic linguistic system, such as a system of verbal and non-verbal symbols. Factors that influence adolescent communication include environmental factors, education, and online games.

    RESEARCH OBJECTIVES: To find out the correlation between frequency of playing online games and teen communication on students' Level I & II of STIKes Muhammadiyah Palembang.

    RESEARCH METHOD: the research method use was quantitative descriptive research with Cross Sectional approach using Purposive Sampling as the technique of collecting data with a simple of 262 out of 760 populations. The instrument used in the form of a questionnaire about the frequency of playing online games and teen communication made by the researcher and has been tested for validity and reliability. This research was conducted in March-April 2019.

    RESULT: From the results of the study, most of the respondents with 116 respondents (82.3%) had passive communication with the frequency of playing online games often, and a small number of respondents with 2 respondents (2.9%) had aggressive communication with the frequency of playing online games sometimes. The result test of Chi Square was obtained a value P value=0.000 (<0.05) CONCLUSION: There was a correlation between frequency of playing online games and teen communication on students' level I & II STIKes Muhammadiyah Palembang.

    Matched MeSH terms: Communication*
  8. Fulltext Non-verbal cues: an inevitable assessing skills in doctor-patient relationship
    Khalib, A.L., Madihah, A.B.
    Malaysian Journal of Community Health, 2010;16(1):33-37.
    MyJurnal
    Introduction: Non-verbal cues are untold words that carry a significant meaning. As a doctor, this remark needs to be perceived correctly. It is an inevitable communication knowledge and skills ought to be mastered in any doctorpatient relationship, particularly when making patient’s assessment.
    Methodology: This was a systematic communication assessment of a real observations on doctor-patient relationship in various setting. It was supported by feedbacks from many scholars who were involved in research and teaching and also reviews, papers and studies on the said subject.
    Results: It has been realized that non-verbal communication was equally important and necessary to complement the verbal one. From all non-verbal cues we have recognized and listed, we have identified at least ten to be the most vital areas to be observed while counseling or consulting a patient.
    Conclusion: Non-verbal cues were always present to support doctor in making a final conclusion about his/her patient’s state. If doctor was patience enough, he or she could has a complete profile of his/her patient and this would lead to the improvement in a person’s life. Having an observant attitude and being able to nose around appropriately were skills that have to be learnt, experienced and applied as these might make an effective doctor-patient communication.
    Matched MeSH terms: Communication; Nonverbal Communication
  9. Fulltext Breaking bad news workshop as peer-assisted learning project in primary care clerkship
    Abdul Rahman NF, Ibrahim Azmi M
    Education in Medicine Journal, 2016;8(1):75-77.
    MyJurnal
    Breaking bad news is a crucial communication delivered by healthcare professionals. This skill was
    taught in Management and Science University, Malaysia using lecture previously. Realising the
    instructional delivery gap, breaking bad news workshops was introduced involving not only the theory
    of the skills but the hands on experience as well. This workshop incorporated peer-assisted learning
    method in providing a friendly and conducive environment for the best learning experience for the
    students. Five workshops were conducted with a total of 204 students. Students (n = 38–42 per
    session) were given materials a week prior to the session to familiarise themselves with the workshop.
    Trained peer-assisted tutors (n = 8) guided role-playing sessions as well as giving feedbacks. Students
    found that the workshop to be useful adjunct to learning communication skills, specifically in breaking
    bad news. Students considered peer-assisted learning method provided them with a safe environment
    where mistakes were allowed, corrected and proper skills reiterated. In conclusion, learning breaking
    bad news is feasible with peer-assistance.
    Matched MeSH terms: Communication*
  10. Fulltext Distributed controller clustering in software defined networks
    Abdelaziz A, Fong AT, Gani A, Garba U, Khan S, Akhunzada A, et al.
    PLoS One, 2017;12(4):e0174715.
    PMID: 28384312 DOI: 10.1371/journal.pone.0174715
    Software Defined Networking (SDN) is an emerging promising paradigm for network management because of its centralized network intelligence. However, the centralized control architecture of the software-defined networks (SDNs) brings novel challenges of reliability, scalability, fault tolerance and interoperability. In this paper, we proposed a novel clustered distributed controller architecture in the real setting of SDNs. The distributed cluster implementation comprises of multiple popular SDN controllers. The proposed mechanism is evaluated using a real world network topology running on top of an emulated SDN environment. The result shows that the proposed distributed controller clustering mechanism is able to significantly reduce the average latency from 8.1% to 1.6%, the packet loss from 5.22% to 4.15%, compared to distributed controller without clustering running on HP Virtual Application Network (VAN) SDN and Open Network Operating System (ONOS) controllers respectively. Moreover, proposed method also shows reasonable CPU utilization results. Furthermore, the proposed mechanism makes possible to handle unexpected load fluctuations while maintaining a continuous network operation, even when there is a controller failure. The paper is a potential contribution stepping towards addressing the issues of reliability, scalability, fault tolerance, and inter-operability.
    Matched MeSH terms: Computer Communication Networks*
  11. Asia educates to brake the population juggernaut
    Friedman B
    Soc Welfare (India), 1974 Dec 5;21(9):3.
    PMID: 12257917
    Matched MeSH terms: Communication*
  12. Cardiologist-Dentist Interaction in the Dental Management of Immunocompromised Cardiac Patient
    Chidambaram R
    J Coll Physicians Surg Pak, 2017 Apr;27(4):261.
    PMID: 28492161 DOI: 2604
    Matched MeSH terms: Communication*
  13. Fulltext Optimization of Planar Monopole Wideband Antenna for Wireless Communication System
    Shakib MN, Moghavvemi M, Mahadi WN
    PLoS One, 2016;11(12):e0168013.
    PMID: 27992466 DOI: 10.1371/journal.pone.0168013
    In this paper, a new compact wideband monopole antenna is presented for wireless communication applications. This antenna comprises of a new radiating patch, a new arc-shaped strip, microstrip feed line, and a notched ground plane. The proposed radiating patch is combined with a rectangular and semi-circular patch and is integrated with a partial ground plane to provide a wide impedance bandwidth. The new arc-shaped strip between the radiating patch and microstrip feed line creates an extra surface on the patch, which helps further widen the bandwidth. Inserting one step notch on the ground plane further enhances the bandwidth. The antenna has a compact size of 16×20×1.6mm3. The measured result indicated that the antenna achieves a 127% bandwidth at VSWR≤2, ranging from 4.9GHz to 22.1GHz. Stable radiation patterns with acceptable gain are achieved. Also, a measured bandwidth of 107.7% at VSWR≤1.5 (5.1-17GHz) is obtained, which is suitable for UWB outdoor propagation. This antenna is compatible with a good number of wireless standards, including UWB band, Wimax 5.4 GHz band, MVDDS (12.2-12.7GHz), and close range radar and satellite communication in the X-band (8-12GHz), and Ku band (12-18GHz).
    Matched MeSH terms: Communication*
  14. Fulltext A New Random Walk for Replica Detection in WSNs
    Aalsalem MY, Khan WZ, Saad NM, Hossain MS, Atiquzzaman M, Khan MK
    PLoS One, 2016;11(7):e0158072.
    PMID: 27409082 DOI: 10.1371/journal.pone.0158072
    Wireless Sensor Networks (WSNs) are vulnerable to Node Replication attacks or Clone attacks. Among all the existing clone detection protocols in WSNs, RAWL shows the most promising results by employing Simple Random Walk (SRW). More recently, RAND outperforms RAWL by incorporating Network Division with SRW. Both RAND and RAWL have used SRW for random selection of witness nodes which is problematic because of frequently revisiting the previously passed nodes that leads to longer delays, high expenditures of energy with lower probability that witness nodes intersect. To circumvent this problem, we propose to employ a new kind of constrained random walk, namely Single Stage Memory Random Walk and present a distributed technique called SSRWND (Single Stage Memory Random Walk with Network Division). In SSRWND, single stage memory random walk is combined with network division aiming to decrease the communication and memory costs while keeping the detection probability higher. Through intensive simulations it is verified that SSRWND guarantees higher witness node security with moderate communication and memory overheads. SSRWND is expedient for security oriented application fields of WSNs like military and medical.
    Matched MeSH terms: Computer Communication Networks*
  15. Fulltext Enhanced handover mechanism using mobility prediction in wireless networks
    Yap KL, Chong YW, Liu W
    PLoS One, 2020;15(1):e0227982.
    PMID: 31978101 DOI: 10.1371/journal.pone.0227982
    The rapid increase in the usage of the mobile internet has led to a great expansion of cellular data networks in order to provide better quality of service. However, the cost to expand the cellular network is high. One of the solutions to provide affordable wireless connectivity is the deployment of a WiFi access point to offload users' data usage. Nevertheless, the frequent and inefficient handover process between the WiFi AP and cellular network, especially when the mobile device is on the go, may degrade the network performance. Mobile devices do not have the intelligence to select the optimal network to enhance the quality of service (QoS). This paper presents an enhanced handover mechanism using mobility prediction (eHMP) to assist mobile devices in the handover process so that users can experience seamless connectivity. eHMP is tested in two wireless architectures, homogeneous and heterogeneous networks. The network performance significantly improved when eHMP is used in a homogeneous network, where the network throughput increases by 106% and the rate of retransmission decreases by 85%. When eHMP is used in a heterogeneous network, the network throughput increases by 55% and the retransmission rate decreases by 75%. The findings presented in this paper reveal that mobility prediction coupled with the multipath protocol can improve the QoS for mobile devices. These results will contribute to a better understanding of how the network service provider can offload traffic to the WiFi network without experiencing performance degradation.
    Matched MeSH terms: Computer Communication Networks*
  16. Fulltext Reinforcement learning for routing in cognitive radio ad hoc networks
    Al-Rawi HA, Yau KL, Mohamad H, Ramli N, Hashim W
    ScientificWorldJournal, 2014;2014:960584.
    PMID: 25140350 DOI: 10.1155/2014/960584
    Cognitive radio (CR) enables unlicensed users (or secondary users, SUs) to sense for and exploit underutilized licensed spectrum owned by the licensed users (or primary users, PUs). Reinforcement learning (RL) is an artificial intelligence approach that enables a node to observe, learn, and make appropriate decisions on action selection in order to maximize network performance. Routing enables a source node to search for a least-cost route to its destination node. While there have been increasing efforts to enhance the traditional RL approach for routing in wireless networks, this research area remains largely unexplored in the domain of routing in CR networks. This paper applies RL in routing and investigates the effects of various features of RL (i.e., reward function, exploitation, and exploration, as well as learning rate) through simulation. New approaches and recommendations are proposed to enhance the features in order to improve the network performance brought about by RL to routing. Simulation results show that the RL parameters of the reward function, exploitation, and exploration, as well as learning rate, must be well regulated, and the new approaches proposed in this paper improves SUs' network performance without significantly jeopardizing PUs' network performance, specifically SUs' interference to PUs.
    Matched MeSH terms: Computer Communication Networks*
  17. Fulltext Quality and safety issue: language barriers in healthcare, a qualitative study of non-Arab healthcare practitioners caring for Arabic patients in the UAE
    Al-Yateem N, Hijazi H, Saifan AR, Ahmad A, Masa'Deh R, Alrimawi I, et al.
    BMJ Open, 2023 Dec 22;13(12):e076326.
    PMID: 38135338 DOI: 10.1136/bmjopen-2023-076326
    OBJECTIVES: To identify language-related communication barriers that expatriate (non-Arabic) healthcare practitioners in the UAE encounter in their daily practice.

    DESIGN: Qualitative study utilising semi-structured in-depth interviews. The interviews were conducted in English language.

    SETTING: Different healthcare facilities across the UAE. These facilities were accessed for data collection over a period of 3 months from January 2023 to March 2023.

    PARTICIPANTS: 14 purposively selected healthcare practitioners.

    INTERVENTION: No specific intervention was implemented; this study primarily aimed at gaining insights through interviews.

    PRIMARY AND SECONDARY OUTCOMES: To understand the implications of language barriers on service quality, patient safety, and healthcare providers' well-being.

    RESULTS: Three main themes emerged from our analysis of participants' narratives: Feeling left alone, Trying to come closer to their patients and Feeling guilty, scared and dissatisfied.

    CONCLUSIONS: Based on the perspectives and experiences of participating healthcare professionals, language barriers have notably influenced the delivery of healthcare services, patient safety and the well-being of both patients and practitioners in the UAE. There is a pressing need, as highlighted by these professionals, for the inclusion of professional interpreters and the provision of training to healthcare providers to enhance effective collaboration with these interpreters.

    Matched MeSH terms: Communication; Communication Barriers
  18. The application of communication accommodation theory to understand receiver reactions in healthcare speaking up interactions
    Barlow M, Watson B, Jones E, Morse C, Maccallum F
    J Interprof Care, 2024 Jan 02;38(1):42-51.
    PMID: 37702325 DOI: 10.1080/13561820.2023.2249939
    Speaking up for patient safety is a well-documented, complex communication interaction, which is challenging both to teach and to implement into practice. In this study we used Communication Accommodation Theory to explore receivers' perceptions and their self-reported behaviors during an actual speaking up interaction in a health context. Intergroup dynamics were evident across interactions. Where seniority of the participants was salient, the within-profession interactions had more influence on the receiver's initial reactions and overall evaluation of the message, compared to the between profession interactions. Most of the seniority salient interactions occurred down the hierarchy, where a more senior professional ingroup member delivered the speaking up message to a more junior receiver. These senior speaker interactions elicited fear and impeded the receiver's voice. We found that nurses/midwives and allied health clinicians reported using different communication behaviors in speaking up interactions. We propose that the term "speaking up" be changed, to emphasize receivers' reactions when they are spoken up to, to help receivers engage in more mutually beneficial communication strategies.
    Matched MeSH terms: Communication*
  19. Fulltext Optimizing energy efficiency in heterogeneous networks: An integrated stochastic geometry approach with novel sleep mode strategies and QoS framework
    Shabbir A, Rizvi S, Alam MM, Shirazi F, Su'ud MM
    PLoS One, 2024;19(2):e0296392.
    PMID: 38408070 DOI: 10.1371/journal.pone.0296392
    The quest for energy efficiency (EE) in multi-tier Heterogeneous Networks (HetNets) is observed within the context of surging high-speed data demands and the rapid proliferation of wireless devices. The analysis of existing literature underscores the need for more comprehensive strategies to realize genuinely energy-efficient HetNets. This research work contributes significantly by employing a systematic methodology, utilizing This model facilitates the assessment of network performance by considering the spatial distribution of network elements. The stochastic nature of the PPP allows for a realistic representation of the random spatial deployment of base stations and users in multi-tier HetNets. Additionally, an analytical framework for Quality of Service (QoS) provision based on D-DOSS simplifies the understanding of user-base station relationships and offers essential performance metrics. Moreover, an optimization problem formulation, considering coverage, energy maximization, and delay minimization constraints, aims to strike a balance between key network attributes. This research not only addresses crucial challenges in creating EE HetNets but also lays a foundation for future advancements in wireless network design, operation, and management, ultimately benefiting network operators and end-users alike amidst the growing demand for high-speed data and the increasing prevalence of wireless devices. The proposed D-DOSS approach not only offers insights for the systematic design and analysis of EE HetNets but also systematically outperforms other state-of-the-art techniques presented. The improvement in energy efficiency systematically ranges from 67% (min side) to 98% (max side), systematically demonstrating the effectiveness of the proposed strategy in achieving higher energy efficiency compared to existing strategies. This systematic research work establishes a strong foundation for the systematic evolution of energy-efficient HetNets. The systematic methodology employed ensures a comprehensive understanding of the complex interplay of network dynamics and user requirements in a multi-tiered environment.
    Matched MeSH terms: Computer Communication Networks*
  20. Lexical Alignment is Pervasive Across Contexts in Non-WEIRD Adult-Child Interactions
    Chieng ACJ, Wynn CJ, Wong TP, Barrett TS, Borrie SA
    Cogn Sci, 2024 Mar;48(3):e13417.
    PMID: 38478742 DOI: 10.1111/cogs.13417
    Lexical alignment, a communication phenomenon where conversational partners adapt their word choices to become more similar, plays an important role in the development of language and social communication skills. While this has been studied extensively in the conversations of preschool-aged children and their parents in Western, Educated, Industrialized, Rich, and Democratic (WEIRD) communities, research in other pediatric populations is sparse. This study makes significant expansions on the existing literature by focusing on alignment in naturalistic conversations of school-aged children from a non-WEIRD population across multiple conversational tasks and with different types of adult partners. Typically developing children aged 5 to 8 years (n = 45) engaged in four semi-structured conversations that differed by task (problem-solving vs. play-based) and by partner (parent vs. university student), resulting in a corpus of 180 conversations. Lexical alignment scores were calculated and compared to sham conversations, representing alignment occurring at the level of chance. Both children and adults coordinated their conversational utterances by re-using or aligning each other's word choices. This alignment behavior persisted across conversational tasks and partners, although the degree of alignment was moderated by the conversational context. These findings suggest that lexical alignment is a robust phenomenon in conversations between school-age children and adults. Furthermore, this study extends lexical alignment findings to a non-WEIRD culture, suggesting that alignment may be a coordination strategy employed by adults and children across diverse linguistic and cultural backgrounds.
    Matched MeSH terms: Communication*
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