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"DATA TRANSMISSION"
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A Review of Monitoring Technologies for Solar PV Systems Using Data Processing Modules and Transmission Protocols: Progress, Challenges and Prospects
Solar photovoltaic (PV) is one of the prominent sustainable energy sources which shares a greater percentage of the energy generated from renewable resources. As the need for solar energy has risen tremendously in the last few decades, monitoring technologies have received considerable attention in relation to performance enhancement. Recently, the solar PV monitoring system has been integrated with a wireless platform that comprises data acquisition from various sensors and nodes through wireless data transmission. However, several issues could affect the performance of solar PV monitoring, such as large data management, signal interference, long-range data transmission, and security. Therefore, this paper comprehensively reviews the progress of several solar PV-based monitoring technologies focusing on various data processing modules and data transmission protocols. Each module and transmission protocol-based monitoring technology is investigated with regard to type, design, implementations, specifications, and limitations. The critical discussion and analysis are carried out with respect to configurations, parameters monitored, software, platform, achievements, and suggestions. Moreover, various key issues and challenges are explored to identify the existing research gaps. Finally, this review delivers selective proposals for future research works. All the highlighted insights of this review will hopefully lead to increased efforts toward the enhancement of the monitoring technologies in future sustainable solar PV applications.
Journal Article
Performance Modeling and Design of Computer Systems
Tackling the questions that systems designers care about, this book brings queueing theory decisively back to computer science. The book is written with computer scientists and engineers in mind and is full of examples from computer systems, as well as manufacturing and operations research. Fun and readable, the book is highly approachable, even for undergraduates, while still being thoroughly rigorous and also covering a much wider span of topics than many queueing books. Readers benefit from a lively mix of motivation and intuition, with illustrations, examples and more than 300 exercises – all while acquiring the skills needed to model, analyze and design large-scale systems with good performance and low cost. The exercises are an important feature, teaching research-level counterintuitive lessons in the design of computer systems. The goal is to train readers not only to customize existing analyses but also to invent their own.
eBook
Energy-efficient priority encoding strategies using machine learning based hybrid MAC protocol for wireless sensor networks
In the present work, a Priority-Aware Periodic Hybrid MAC protocol ($$Pa^2HMAC$$) is proposed to achieve intelligent, energy-efficient, and priority-based data transmission in Wireless Sensor Networks (WSNs). WSNs frequently encounter challenges in efficiently managing heterogeneous traffic—such as event-driven, periodic, and emergency data—while maintaining low latency and reduced energy consumption. Traditional MAC protocols rely on static scheduling, lacking the adaptability needed to handle critical or time-sensitive data under varying network conditions, leading to packet delays, energy wastage, and reduced responsiveness. The proposed$$Pa^2HMAC$$protocol integrates a machine learning-based priority encoding mechanism that evaluates data transmission priorities based on three key factors: data priority, emergency data, and buffer overflow. It operates in two distinct modes—Normal and Priority—to dynamically adapt to changing network requirements. In Normal mode, sensor nodes transmit data using either TDMA or BMA schemes depending on traffic type, while the central controller optimally determines sampling rates for periodic data. When emergency or high-priority conditions occur, the system switches to Priority mode to ensure timely and reliable data delivery. Simulation results demonstrate that the proposed$$Pa^2HMAC$$outperforms existing TDMA, EA-TDMA, EBMA, and ASHMAC protocols in terms of energy efficiency, and latency reduction, thereby offering a robust framework for priority-aware, energy-efficient communication in WSNs.
Journal Article
A Secure, Energy- and SLA-Efficient (SESE) E-Healthcare Framework for Quickest Data Transmission Using Cyber-Physical System
Due to advances in technology, research in healthcare using a cyber-physical system (CPS) opens innovative dimensions of services. In this paper, the authors propose an energy- and service-level agreement (SLA)-efficient cyber physical system for E-healthcare during data transmission services. Furthermore, the proposed phenomenon will be enhanced to ensure the security by detecting and eliminating the malicious devices/nodes involved during the communication process through advances in the ad hoc on-demand distance vector (AODV) protocol. The proposed framework addresses the two security threats, such as grey and black holes, that severely affect network services. Furthermore, the proposed framework used to find the different network metrics such as average qualifying service set (QSS) paths, mean hop and energy efficiency of the quickest path. The framework is simulated by calculating the above metrics in mutual cases i.e., without the contribution of malevolent nodes and with the contribution of malevolent nodes over service time, hop count and energy constraints. Further, variation of SLA and energy shows their expediency in the selection of efficient network metrics.
Journal Article
Security of Cryptocurrencies: A View on the State-of-the-Art Research and Current Developments
[Context] The goal of security is to protect digital assets, devices, and services from being disrupted, exploited or stolen by unauthorized users. It is also about having reliable information available at the right time. [Motivation] Since the inception in 2009 of the first cryptocurrency, few studies have been undertaken to analyze and review the state-of-the-art research and current developments with respect to the security of cryptocurrencies. [Purpose] We aim to provide both theoretical and empirical insights into the security landscape, in particular focusing on both technical solutions and human-related facets. [Methodology] We used an integrative review which could help in building science and scholarly research, the basis for conceptual and empirical models. [Results] Successful defense against cyberattacks depends on technical measures on the one hand, as well as on self-education and training with the aim to develop competence, knowledge, skills and social abilities, on the other. [Contribution] Our findings provide a comprehensive review for the major achievements and developments of the recent progress on the security of cryptocurrencies. [Future research] Since there is increasing interest in adoption of the current solutions within the central bank digital currencies, the future research should explore the development and inception of effective measures against social engineering attacks, which still remain the main concern.
Journal Article