Displaying publications 1 - 20 of 532 in total

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  1. Joginder Singh S, Suhumaran LV, Skulski K, Ahmad Rusli Y
    Augment Altern Commun, 2022 Dec;38(4):236-244.
    PMID: 36573041 DOI: 10.1080/07434618.2022.2141135
    Most speech-language pathologists (SLPs) in Malaysia practice with an undergraduate degree, which provides them with limited knowledge about and training in augmentative and alternative communication (AAC). This limited knowledge and training may affect their confidence and competence when introducing and using AAC with individuals for whom it is required. This study aimed to obtain feedback, via semi-structured interviews, from a group of 11 Malaysian university students who participated in an AAC training program about their experiences participating in and the effectiveness of the training program. Three themes were derived from qualitative content analysis of the interviews: (a)Time Demands, (b) Generalizing the use of AAC, and (c) Learning Required When Introducing AAC. The participants reported that they obtained better insights into the role of SLPs and communication partners with regards to AAC, as well as the struggles they faced. Students also reported increased confidence when working with individuals who use AAC after participating in the training program, thus supporting the need for similar training programs in the future.
    Matched MeSH terms: Communication; Communication Aids for Disabled*; Communication Disorders*
  2. Gianesini S, Chi YW, Agüero C, Alqedrah D, Amore M, Barbati M, et al.
    Int Angiol, 2023 Apr;42(2):89-189.
    PMID: 36930179 DOI: 10.23736/S0392-9590.23.05044-7
    Published scientific evidence demonstrate the current spread of healthcare misinformation in the most popular social networks and unofficial communication channels. Up to 40% of the medical websites were identified reporting inappropriate information, moreover being shared more than 450,000 times in a 5-year-time frame. The phenomenon is particularly spread in infective diseases medicine, oncology and cardiovascular medicine. The present document is the result of a scientific and educational endeavor by a worldwide group of top experts who selected and analyzed the major issues and related evidence-based facts on vein and lymphatic management. A section of this work is entirely dedicated to the patients and therefore written in layman terms, with the aim of improving public vein-lymphatic awareness. The part dedicated to the medical professionals includes a revision of the current literature, summing up the statements that are fully evidence-based in venous and lymphatic disease management, and suggesting future lines of research to fulfill the still unmet needs. The document has been written following an intense digital interaction among dedicated working groups, leading to an institutional project presentation during the Universal Expo in Dubai, in the occasion of the v-WINter 2022 meeting.
    Matched MeSH terms: Communication*
  3. Ayoub Kamal M, Alam MM, Sajak AAB, Mohd Su'ud M
    Comput Intell Neurosci, 2023;2023:5183062.
    PMID: 36654727 DOI: 10.1155/2023/5183062
    LoRa is an ISM-band based LPWAN communication protocol. Despite their wide network penetration of approximately 20 kilometers or higher using lower than 14 decibels transmitting power, it has been extensively documented and used in academia and industry. Although LoRa connectivity defines a public platform and enables users to create independent low-power wireless connections while relying on external architecture, it has gained considerable interest from scholars and the market. The two fundamental components of this platform are LoRaWAN and LoRa PHY. The consumer LoRaWAN component of the technology describes the network model, connectivity procedures, ability to operate the frequency range, and the types of interlinked gadgets. In contrast, the LoRa PHY component is patentable and provides information on the modulation strategy which is being utilized and its attributes. There are now several LoRa platforms available. To create usable LoRa systems, there are presently several technical difficulties to be overcome, such as connection management, allocation of resources, consistent communications, and security. This study presents a thorough overview of LoRa networking, covering the technological difficulties in setting up LoRa infrastructures and current solutions. Several outstanding challenges of LoRa communication are presented depending on our thorough research of the available solutions. The research report aims to stimulate additional research toward enhancing the LoRa Network capacity and allowing more realistic installations.
    Matched MeSH terms: Communication*
  4. Joginder Singh S, Mohd Ayob N, Hassan FH
    Disabil Rehabil Assist Technol, 2023 Jan;18(1):118-126.
    PMID: 36344474 DOI: 10.1080/17483107.2022.2140850
    PURPOSE: Children with developmental disabilities who have complex communication needs (CCN) frequently need to use augmentative and alternative communication (AAC) to communicate effectively and efficiently. Speech-language pathologists (SLPs) often work closely with parents and other professionals when deciding on the best AAC system to introduce to these children. This study aimed to describe the use of AAC by children with CCN in Malaysia as reported by their parents.

    MATERIALS AND METHOD: An online survey distributed for this study was completed by 235 parents.

    RESULTS: Most of the parents of children with CCN who participated in this study reported that their children used low-tech AAC systems. A majority of respondents were satisfied with their child's AAC system. Parental satisfaction was positively associated with the frequency of use and whether the use of AAC helped parents understand the child better. Challenges reported by parents when using AAC and the reason some families abandoned the use of AAC were similar. Examples of challenges include parents having limited time and the child lacking the motivation to use the AAC system.

    CONCLUSION: The findings of this study suggest the importance of SLPs actively involving parents in the selection of their children's AAC system so they are agreeable with the system introduced and continuously supporting children and their families to encourage and sustain the use of AAC. Implications for rehabilitationSpeech-language pathologists (SLPs) can create communication opportunities for the child to use augmentative and alternative communication (AAC) and experience success, teach parents how to incorporate AAC into the family's daily routine and activities, and reduce the demands on parents by preparing the AAC materials and programming the AAC system where possible.SLPs can provide ongoing support to school teachers to equip them with the necessary knowledge and skills to support the use of AAC in the classroom.

    Matched MeSH terms: Communication; Communication Aids for Disabled*; Communication Disorders*
  5. Joginder Singh S, Loo ZL
    Disabil Rehabil Assist Technol, 2023 Nov;18(8):1281-1289.
    PMID: 37017363 DOI: 10.1080/17483107.2023.2196305
    PURPOSE: Augmentative and alternative communication (AAC) systems are often introduced to children with disabilities who demonstrate complex communication needs. As attending school is an essential part of these children's lives, it is important that they use their AAC system to communicate in the classroom. This study aimed to describe the nature of the use of AAC by students with developmental disabilities in the classroom.

    MATERIALS AND METHOD: This study was conducted in Malaysia. Six students were observed twice each in their classroom and their classroom interactions were video recorded. The video recordings were transcribed and coded for the presence of a communication event, the student's mode of communication and communication function, the communication partner involved, and access to the AAC system.

    RESULTS: Contrary to past studies, most students in this study spontaneously initiated interaction almost as many times as they responded. They primarily communicated with gestures and verbalizations/vocalizations despite having been introduced to an AAC system. When students communicated using their AAC system, they mainly interacted with the teachers, and for the function of either behavioral regulation or joint attention. It was found that for 39% of communicative events, the student's aided AAC system was not within arm's reach.

    CONCLUSION: The findings highlight the need for efforts to encourage students with complex communication needs to use AAC more frequently in their classroom to be able to communicate more effectively and for a wider range of communicative functions. Speech-language pathologists can work closely with teachers to provide the necessary support to these students.

    Matched MeSH terms: Communication; Communication Aids for Disabled*; Communication Disorders*
  6. Al-Mishmish H, Akhayyat A, Rahim HA, Hammood DA, Ahmad RB, Abbasi QH
    Sensors (Basel), 2018 Oct 28;18(11).
    PMID: 30373314 DOI: 10.3390/s18113661
    Wireless Body Area Networks (WBANs) are single-hop network systems, where sensors gather the body's vital signs and send them directly to master nodes (MNs). The sensors are distributed in or on the body. Therefore, body posture, clothing, muscle movement, body temperature, and climatic conditions generally influence the quality of the wireless link between sensors and the destination. Hence, in some cases, single hop transmission ('direct transmission') is not sufficient to deliver the signals to the destination. Therefore, we propose an emergency-based cooperative communication protocol for WBAN, named Critical Data-based Incremental Cooperative Communication (CD-ICC), based on the IEEE 802.15.6 CSMA standard but assuming a lognormal shadowing channel model. In this paper, a complete study of a system model is inspected in the terms of the channel path loss, the successful transmission probability, and the outage probability. Then a mathematical model is derived for the proposed protocol, end-to-end delay, duty cycle, and average power consumption. A new back-off time is proposed within CD-ICC, which ensures the best relays cooperate in a distributed manner. The design objective of the CD-ICC is to reduce the end-to-end delay, the duty cycle, and the average power transmission. The simulation and numerical results presented here show that, under general conditions, CD-ICC can enhance network performance compared to direct transmission mode (DTM) IEEE 802.15.6 CSMA and benchmarking. To this end, we have shown that the power saving when using CD-ICC is 37.5% with respect to DTM IEEE 802.15.6 CSMA and 10% with respect to MI-ICC.
    Matched MeSH terms: Communication*; Computer Communication Networks*
  7. Al-Kharasani NM, Zulkarnain ZA, Subramaniam S, Hanapi ZM
    Sensors (Basel), 2018 Feb 15;18(2).
    PMID: 29462884 DOI: 10.3390/s18020597
    Routing in Vehicular Ad hoc Networks (VANET) is a bit complicated because of the nature of the high dynamic mobility. The efficiency of routing protocol is influenced by a number of factors such as network density, bandwidth constraints, traffic load, and mobility patterns resulting in frequency changes in network topology. Therefore, Quality of Service (QoS) is strongly needed to enhance the capability of the routing protocol and improve the overall network performance. In this paper, we introduce a statistical framework model to address the problem of optimizing routing configuration parameters in Vehicle-to-Vehicle (V2V) communication. Our framework solution is based on the utilization of the network resources to further reflect the current state of the network and to balance the trade-off between frequent changes in network topology and the QoS requirements. It consists of three stages: simulation network stage used to execute different urban scenarios, the function stage used as a competitive approach to aggregate the weighted cost of the factors in a single value, and optimization stage used to evaluate the communication cost and to obtain the optimal configuration based on the competitive cost. The simulation results show significant performance improvement in terms of the Packet Delivery Ratio (PDR), Normalized Routing Load (NRL), Packet loss (PL), and End-to-End Delay (E2ED).
    Matched MeSH terms: Computer Communication Networks
  8. Munusamy S, Syasyila K, Shaari AAH, Pitchan MA, Kamaluddin MR, Jatnika R
    BMC Psychol, 2024 Nov 18;12(1):673.
    PMID: 39558439 DOI: 10.1186/s40359-024-02129-2
    The proliferation of fake news on social media platforms has become a significant concern, influencing public opinion, political decisions, and societal trust. While much research has focused on the technological and algorithmic factors behind the spread of misinformation, less attention has been given to the psychological drivers that contribute to the creation and dissemination of fake news. Cognitive biases, emotional appeals, and social identity motivations are believed to play a crucial role in shaping user behaviour on social media, yet there is limited systematic understanding of how these psychological factors intersect with online information sharing. Existing studies tend to focus on individual aspects of fake news consumption, such as susceptibility to misinformation or partisan biases, leaving a gap in understanding the broader psychological mechanisms behind both the creation and dissemination of fake news. This systematic review aims to fill this gap by synthesizing current research on the psychological factors that influence social media users' involvement in dissemination and creation of fake news. Twenty-three studies were identified from 2014 to 2024 following the PRISMA guidelines. We have identified five themes through critical review and synthesis of the literature which are personal factors, ignorance, social factors, biological process, and cognitive process. These themes help to explain the psychological factors contributing to the creation and dissemination of fake news among social media users. Based on the findings, it is evident that diverse psychological factors influence the dissemination and creation of fake news, which must be studied to design better strategies to minimize this issue.
    Matched MeSH terms: Communication
  9. Khan MA, Hasbullah H, Nazir B, Khan IA
    ScientificWorldJournal, 2014;2014:785305.
    PMID: 25152924 DOI: 10.1155/2014/785305
    Recently, wireless sensor network (WSN) applications have seen an increase in interest. In search and rescue, battlefield reconnaissance, and some other such applications, so that a survey of the area of interest can be made collectively, a set of mobile nodes is deployed. Keeping the network nodes connected is vital for WSNs to be effective. The provision of connectivity can be made at the time of startup and can be maintained by carefully coordinating the nodes when they move. However, if a node suddenly fails, the network could be partitioned to cause communication problems. Recently, several methods that use the relocation of nodes for connectivity restoration have been proposed. However, these methods have the tendency to not consider the potential coverage loss in some locations. This paper addresses the concerns of both connectivity and coverage in an integrated way so that this gap can be filled. A novel algorithm for simultaneous-node repositioning is introduced. In this approach, each neighbour of the failed node, one by one, moves in for a certain amount of time to take the place of the failed node, after which it returns to its original location in the network. The effectiveness of this algorithm has been verified by the simulation results.
    Matched MeSH terms: Computer Communication Networks*
  10. Homaei MH, Salwana E, Shamshirband S
    Sensors (Basel), 2019 Jul 18;19(14).
    PMID: 31323905 DOI: 10.3390/s19143173
    "Internet of Things (IoT)" has emerged as a novel concept in the world of technology and communication. In modern network technologies, the capability of transmitting data through data communication networks (such as Internet or intranet) is provided for each organism (e.g. human beings, animals, things, and so forth). Due to the limited hardware and operational communication capability as well as small dimensions, IoT undergoes several challenges. Such inherent challenges not only cause fundamental restrictions in the efficiency of aggregation, transmission, and communication between nodes; but they also degrade routing performance. To cope with the reduced availability time and unstable communications among nodes, data aggregation, and transmission approaches in such networks are designed more intelligently. In this paper, a distributed method is proposed to set child balance among nodes. In this method, the height of the network graph increased through restricting the degree; and network congestion reduced as a result. In addition, a dynamic data aggregation approach based on Learning Automata was proposed for Routing Protocol for Low-Power and Lossy Networks (LA-RPL). More specifically, each node was equipped with learning automata in order to perform data aggregation and transmissions. Simulation and experimental results indicate that the LA-RPL has better efficiency than the basic methods used in terms of energy consumption, network control overhead, end-to-end delay, loss packet and aggregation rates.
    Matched MeSH terms: Communication; Computer Communication Networks
  11. Devan PAM, Hussin FA, Ibrahim R, Bingi K, Khanday FA
    Sensors (Basel), 2021 Jul 21;21(15).
    PMID: 34372210 DOI: 10.3390/s21154951
    Industrialization has led to a huge demand for a network control system to monitor and control multi-loop processes with high effectiveness. Due to these advancements, new industrial wireless sensor network (IWSN) standards such as ZigBee, WirelessHART, ISA 100.11a wireless, and Wireless network for Industrial Automation-Process Automation (WIA-PA) have begun to emerge based on their wired conventional structure with additional developments. This advancement improved flexibility, scalability, needed fewer cables, reduced the network installation and commissioning time, increased productivity, and reduced maintenance costs compared to wired networks. On the other hand, using IWSNs for process control comes with the critical challenge of handling stochastic network delays, packet drop, and external noises which are capable of degrading the controller performance. Thus, this paper presents a detailed study focusing only on the adoption of WirelessHART in simulations and real-time applications for industrial process monitoring and control with its crucial challenges and design requirements.
    Matched MeSH terms: Computer Communication Networks*
  12. Ghaleb FA, Al-Rimy BAS, Boulila W, Saeed F, Kamat M, Foad Rohani M, et al.
    Comput Intell Neurosci, 2021;2021:2977954.
    PMID: 34413885 DOI: 10.1155/2021/2977954
    Wireless mesh networks (WMNs) have emerged as a scalable, reliable, and agile wireless network that supports many types of innovative technologies such as the Internet of Things (IoT), Wireless Sensor Networks (WSN), and Internet of Vehicles (IoV). Due to the limited number of orthogonal channels, interference between channels adversely affects the fair distribution of bandwidth among mesh clients, causing node starvation in terms of insufficient bandwidth distribution, which impedes the adoption of WMN as an efficient access technology. Therefore, a fair channel assignment is crucial for the mesh clients to utilize the available resources. However, the node starvation problem due to unfair channel distribution has been vastly overlooked during channel assignment by the extant research. Instead, existing channel assignment algorithms equally distribute the interference reduction on the links to achieve fairness which neither guarantees a fair distribution of the network bandwidth nor eliminates node starvation. In addition, the metaheuristic-based solutions such as genetic algorithm, which is commonly used for WMN, use randomness in creating initial population and selecting the new generation usually leading the search to local minima. To this end, this study proposes a Fairness-Oriented Semichaotic Genetic Algorithm-Based Channel Assignment Technique (FA-SCGA-CAA) to solve node starvation problem in wireless mesh networks. FA-SCGA-CAA maximizes link fairness while minimizing link interference using a genetic algorithm (GA) with a novel nonlinear fairness-oriented fitness function. The primary chromosome with powerful genes is created based on multicriterion links ranking channel assignment algorithm. Such a chromosome was used with a proposed semichaotic technique to create a strong population that directs the search towards the global minima effectively and efficiently. The proposed semichaotic technique was also used during the mutation and parent selection of the new genes. Extensive experiments were conducted to evaluate the proposed algorithm. A comparison with related work shows that the proposed FA-SCGA-CAA reduced the potential node starvation by 22% and improved network capacity utilization by 23%. It can be concluded that the proposed FA-SCGA-CAA is reliable to maintain high node-level fairness while maximizing the utilization of the network resources, which is the ultimate goal of many wireless networks.
    Matched MeSH terms: Computer Communication Networks*
  13. Deylami N, Hassan SA, Alareqe NA, Zainudin ZN
    PMID: 34501535 DOI: 10.3390/ijerph18178945
    Amounting evidence indicates that insufficient knowledge of marital communication skills leads to destructive interactions and poor marital adjustments in couples, especially during stressful situations. Despite the high effectiveness of Gottman's psychoeducational intervention, there is a lack of study on the online Gottman's psychoeducation intervention (O-GPI) to improve marital communication and dyadic adjustments. The aim of this study was to evaluate the effectiveness of O-GPI on the improvement of marital communication patterns among Iranian couples.

    METHOD: The study followed a single-blind parallel group in a randomized controlled trial using an experimental longitudinal design, comprising 72 heterosexual couples living in Shiraz, Iran, with a 1-7-year marital age and no severe marital problems. The experimental group received eight consecutive O-GPIs via the Zoom platform, while the control group received information related to parenting skills via email. The outcome measures were the three patterns of communication: (i) constructive communication; (ii) demand-withdraw communication; and (iii) mutual avoidance communication-the screening measure was the dyadic adjustment scale.

    RESULTS: The findings indicated that O-GPI could improve couples' constructive communication significantly (45% for husbands and 40% wives) and decrease their total demand-withdrawal (51% for husbands and 65% wives) and mutual avoidance communication (60% for husbands and 62% wives).

    LIMITATIONS: Due to the homogenous nature of the sample, generalizations should be made with caution.

    CONCLUSIONS: This study demonstrates the feasibility and effectiveness of the online Gottman's psychoeducational intervention to improve couples' communication patterns.

    Matched MeSH terms: Communication*
  14. Lawrence RJ, Gatzweiler FW
    J Urban Health, 2017 08;94(4):592-596.
    PMID: 28695402 DOI: 10.1007/s11524-017-0182-x
    The current disconnection between access to increasing amounts of data about urbanization, health, and other global changes and the conflicting meanings and values of that data has created uncertainty and reduced the ability of people to act upon available information which they do not necessarily understand. We see a disconnection between increasing data availability and data processing capability and capacity. In response to this disconnection, modeling has been attributed an important role in international and national research programs in order to predict the future based on past and recent trends. Predictive models are often data heavy and founded on assumptions which are difficult to verify, especially regarding urban health issues in specific contexts. Producing large volumes of data warrants debate about what data are prerequisites for better understanding human health in changing urban environments. Another concern is how data and information can be used to apply knowledge. Making sense of empirical knowledge requires a new transdisciplinary knowledge domain created by a commitment to convergence between researchers in multiple academic disciplines and other actors and institutions in cities. Disciplinary-based researchers are no longer the sole producers of empirical knowledge. Today, diverse kinds of knowledge are becoming an emergent product of multiple societal stakeholders acting collectively to address challenges that impact on their habitat, their livelihood, and their health. Insights from complexity science also require a fundamental rethinking of the role and responsibility of human agency while admitting rather than denying complexity and radical uncertainty.
    Matched MeSH terms: Interdisciplinary Communication*
  15. Yong SW, Law SH, Ibrahim S, Mohamad WNW
    Environ Sci Pollut Res Int, 2023 Feb;30(8):20849-20861.
    PMID: 36260231 DOI: 10.1007/s11356-022-23615-3
    ICTs (information and communication technologies) have emerged as a potent new force. Digitalization, modernization, and automation of the manufacturing process are expected to facilitate ICT adoption, resulting in increased genuine environmental concerns. This research aims to examine the impact of ICTs on environmental quality and the relationship between ICTs, environmental quality, and economic growth. Dynamic panel threshold regression was employed, and the sample countries comprised 69 developing countries from 2010 to 2019. The threshold technique will identify the precise threshold value of ICTs and highlights the impacts of ICTs on the environmental quality nexus when above and below the threshold value in developing countries. Empirical evidence suggests that ICTs positively impact environmental quality (CO2) when above the ICTs threshold value. However, ICTs provide a positive but insignificant impact on environmental quality when below the ICTs threshold value of 4.699. Additionally, ICTs affect the economic growth and environmental quality nexus, with increasing economic growth resulting in a decrease in CO2 emissions in developing countries when ICTs are below the threshold value. Thus, the ICTs threshold value should be used to ensure that ICTs adoption promotes sustainable economic growth and resolves environmental degradation issues in developing nations.
    Matched MeSH terms: Communication*
  16. Thuraisingham C, Abd Razak SS, Nadarajah VD, Mamat NH
    Educ Prim Care, 2023 May;34(3):123-130.
    PMID: 37194600 DOI: 10.1080/14739879.2023.2210097
    INTRODUCTION: Effective communication is essential for patient-centred relationships. Although medical graduates acquire communication skills during undergraduate training, these have been shown to be inadequate in early practice. Both students' and patients' perspectives are required to improve readiness for the workplace, patient satisfaction, and health outcomes. Our research question was: to what extent are medical students prepared with patient-centred communication skills in primary care settings?

    METHODS: A qualitative descriptive research study using in-depth semi-structured interviews was conducted with Year 3 medical students and patients to study their experiences at a primary care clinic, over two weeks. Data were transcribed verbatim and analysed using Braun and Clark's thematic analysis. Both students' and patients' views on communication skills were obtained.

    RESULTS: Three themes were established based on student-patient communication in primary care settings: socio-cultural elements in student-patient communication; cognitive and emotional challenges for effective communication; and enablers for effective student-patient communication. The themes and sub-themes describe both students and patients valuing each other as individuals with socio-cultural beliefs and needs.

    CONCLUSION: The findings can be used to structure new approaches to communication skills education that is patient-centred, culturally sensitive, and informed by patients. Communication skills training should encourage students to prioritise and reflect more on patient perspectives while educators should engage patients to inform and assess the outcomes.

    Matched MeSH terms: Communication*
  17. Yahya MS, Soeung S, Singh NSS, Yunusa Z, Chinda FE, Rahim SKA, et al.
    Sensors (Basel), 2023 Jun 06;23(12).
    PMID: 37420526 DOI: 10.3390/s23125359
    In this study, a novel reconfigurable triple-band monopole antenna for LoRa IoT applications is fabricated on an FR-4 substrate. The proposed antenna is designed to function at three distinct LoRa frequency bands: 433 MHz, 868 MHz, and 915 MHz covering the LoRa bands in Europe, America, and Asia. The antenna is reconfigurable by using a PIN diode switching mechanism, which allows for the selection of the desired operating frequency band based on the state of the diodes. The antenna is designed using CST MWS® software 2019 and optimized for maximum gain, good radiation pattern and efficiency. The antenna with a total dimension of 80 mm × 50 mm × 0.6 mm (0.12λ0×0.07λ0 × 0.001λ0 at 433 MHz) has a gain of 2 dBi, 1.9 dBi, and 1.9 dBi at 433 MHz, 868 MHz, and 915 MHz, respectively, with an omnidirectional H-plane radiation pattern and a radiation efficiency above 90% across the three frequency bands. The fabrication and measurement of the antenna have been carried out, and the results of simulation and measurements are compared. The agreement among the simulation and measurement results confirms the design's accuracy and the antenna's suitability for LoRa IoT applications, particularly in providing a compact, flexible, and energy efficient communication solution for different LoRa frequency bands.
    Matched MeSH terms: Communication*
  18. Tarofder AK, Haque A, Nawaz N, Raisal I, Musah AA, M D Kassim AA
    PLoS One, 2023;18(11):e0289168.
    PMID: 37939130 DOI: 10.1371/journal.pone.0289168
    Computer-mediated communication has dramatically transformed the human communication landscape by enhancing speed, content and social presence. The world has been experiencing a sharp decline in using email and phone calls due to organizations' rapid adoption of instant messenger (IM) for their day-to-day communication with their stakeholders. Moreover, the world has been experiencing a sharp decline in using email and phone calls since the beginning of the IM era. Hence, the aim of this study is to comprehend the IM adoption process through the lens of three theories. A structured questionnaire was developed to collect data from the organizations and test hypotheses using consistent PLS-SEM (PLSc) in SMART PLS combined with bootstrapping. The results indicated that parallelism is the most dominating factor explaining IM adoption in organizations followed by transmission velocity, rehearsability and symbol set. The findings of this study also confirmed that team performance is not influenced by communication but by the quality of the communication and the level of knowledge within the group that can create using instant messenger. Indeed, this empirical study is one of the limited investigations that combine three theories to explain the IM adoption process and its effect on team performance. Moreover, this study contributes both theoretically and practically to comprehending the adoption process of IM. Lastly, this study reconfirmed the importance of Media Synchronicity Theory (MST) and Social Presence Theory (SPT) in predicting IM adoption; and the findings of this research extended the applications of the Adaptive Structuration Theory (AST) from the IM perspective, which is, indeed, rare. Finally, this study provides a great foundation for managers to understand the importance of IM in their day-to-day communication systems.
    Matched MeSH terms: Communication*
  19. Bonny T, Al Nassan W, Sambas A
    PLoS One, 2024;19(1):e0291714.
    PMID: 38261569 DOI: 10.1371/journal.pone.0291714
    Synchronization of the chaotic systems has attracted much attention in recent years due to its vital applications in secured communication systems. In this paper, an implementation and comparative analysis of two different control approaches for synchronization between two identical four-dimensional hyperchaotic systems is presented. The two control approaches are the Adaptive nonlinear controller and the linear optimal quadratic regulator LQR. To demonstrate the effectiveness of each controller, the numerical simulation is presented using Matlab/Simulink and the control law is derived. The performance of the proposed controllers is compared based on four factors; response time, squared error integration, energy applied from the controller, and cost function. To measure the robustness of the control approaches, the performance factors are compared when there is a change in system parameters and a variation in the initial conditions. Then the proposed synchronization methods are implemented on the FPGA platform to demonstrate the utilized resources on Field Programmable Gate Array (FPGA) hardware platform and the operation speed. Finally, to generalize the results of the comparison, the study is implemented for the synchronization of another secured communication system consisting of two identical three-dimensional chaotic. The experimental results show that the LQR method is more effective than the Adaptive controller based on the performance factors we propose. Moreover, the LQR is much simpler to implement on hardware and requires fewer resources on the FPGA.
    Matched MeSH terms: Communication*
  20. Abdul Razak SF, Yogarayan S, Azman A, Abdullah MFA, Muhamad Amin AH, Salleh M
    F1000Res, 2021;10:1265.
    PMID: 36852011 DOI: 10.12688/f1000research.73398.2
    Background: V2V (Vehicle-to-Vehicle) is a booming research field with a diverse set of services and applications. Most researchers rely on vehicular simulation tools to model traffic and road conditions and evaluate the performance of network protocols. We conducted a scoping review to consider simulators that have been reported in the literature based on successful implementation of V2V systems, tutorials, documentation, examples, and/or discussion groups. Methods: Simulators that have limited information were not included. The selected simulators are described individually and compared based on their requirements and features, i.e., origin, traffic model, scalability, and traffic features. This scoping review was reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR). The review considered only research published in English (in journals and conference papers) completed after 2015. Further, three reviewers initiated the data extraction phase to retrieve information from the published papers. Results: Most simulators can simulate system behaviour by modelling the events according to pre-defined scenarios. However, the main challenge faced is integrating the three components to simulate a road environment in either microscopic, macroscopic or mesoscopic models. These components include mobility generators, VANET simulators and network simulators. These simulators require the integration and synchronisation of the transportation domain and the communication domain. Simulation modelling can be run using a different types of simulators that are cost-effective and scalable for evaluating the performance of V2V systems in urban environments. In addition, we also considered the ability of the vehicular simulation tools to support wireless sensors. Conclusions: The outcome of this study may reduce the time required for other researchers to work on other applications involving V2V systems and as a reference for the study and development of new traffic simulators.
    Matched MeSH terms: Communication*
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