International Journal of Wireless and Microwave Technologies (IJWMT)

ISSN: 2076-1449 (Print)

ISSN: 2076-9539 (Online)

DOI: https://doi.org/10.5815/ijwmt

Website: https://www.mecs-press.org/ijwmt

Published By: MECS Press

Frequency: 6 issues per year

Number(s) Available: 75

(IJWMT) in Google Scholar Citations / h5-index

IJWMT is committed to bridge the theory and practice of wireless and microwave technologies. From innovative ideas to specific algorithms and full system implementations, IJWMT publishes original, peer-reviewed, and high quality articles in the areas of wireless and microwave technologies. IJWMT is a well-indexed scholarly journal and is indispensable reading and references for people working at the cutting edge of wireless and microwave technology applications.

 

IJWMT has been abstracted or indexed by several world class databases: Google Scholar, Microsoft Academic Search, Baidu Wenku, Open Access Articles, CNKI, GetInfo, WorldCat, OneSearch, ZB MED, CrossRef, JournalTOCs, etc..

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IJWMT Vol. 14, No. 4, Aug. 2024

REGULAR PAPERS

Enterprise Private Cloud Platforms: A Systematic Review of Key Vendors

By Mykhailo Khomchak

DOI: https://doi.org/10.5815/ijwmt.2024.04.01, Pub. Date: 8 Aug. 2024

Cloud computing has revolutionized the way organizations manage and deploy their Information Technology infrastructure. With an increasing emphasis on data security and residency, regulatory compliance, and the need for customization, private cloud platforms have emerged as a pivotal solution in the enterprise Information Technology landscape. This paper presents a comprehensive review of private cloud technologies, delineating their key features, advantages, and capabilities. Through an exhaustive research methodology, we explore various private cloud solutions, ranging from open-source offerings to proprietary systems. A reference architecture is formulated to provide a holistic understanding of the essential components and interactions inherent to a private cloud platform. Furthermore, 18 categories and 43 subcategories of features and capabilities for the 13 most popular private cloud solutions are identified to assist organizations in evaluating and selecting the most suitable platform based on their specific requirements. This study aims to offer valuable insights to enterprises navigating their cloud adoption journey, emphasizing the significance of making informed decisions in the rapidly evolving cloud computing domain.

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An Energy-Efficient Wireless Sensor Network (EE-WSN) for Hazard and Crack Detection in Coal Mines

By Kakelli Anil Kumar Saurav Ranjan Gudla Mohan Sathwik Tanmay Agrawal Riiju Jagetiya

DOI: https://doi.org/10.5815/ijwmt.2024.04.02, Pub. Date: 8 Aug. 2024

This paper presents a detailed study focused on the utilization of energy-efficient wireless sensor networks (WSNs) specifically designed for hazard and crack detection in coal mines. The primary objective of this research is to develop a WSN system that operates on low power consumption, enabling real-time monitoring of hazardous conditions and cracks within coal mines. The proposed system incorporates energy-efficient methods and protocols to minimize power usage and prolong the lifespan of sensor nodes. The study encompasses the complete design and implementation of a prototype WSN system, followed by a thorough evaluation of its performance within a simulated environment. The obtained results demonstrate the effectiveness of the proposed system in detecting hazards and cracks in real-time while consuming minimal power. Consequently, this research underscores the potential of energy-efficient WSNs to enhance the safety and efficiency of coal mining operations. Moreover, the findings of this study have broader implications, as they can serve as a foundation for the development of similar systems applicable to other hazardous environments, including oil rigs, nuclear power plants, and forest fires. By adopting the energy-efficient WSN approach outlined in this research, these industries can benefit from improved safety measures and enhanced operational efficiency.

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Smart Factory based on IIoT: Applications, Communication Networks and Cybersecurity

By Yazen S. Sheet Mohammed Younis Thanoun Firas S. Alsharbaty

DOI: https://doi.org/10.5815/ijwmt.2024.04.03, Pub. Date: 8 Aug. 2024

Smart factory represents one of the main Industrial Internet of Things applications that contribute in the industrial activities in the smart cities. This field acquires a special attention with the age of industry 4 from upgrading the passive machine into cyber physical system point of view. However, the process of developing the traditional factory into smart factory faces some issues regarding to handle smart and safe management such as handling the requirements of smart factory applications and the communication networks that should transfer the data among different parts. The current review paper highlights the up-to-date related works in the field of industry 4 in terms of industrial internet of things (IIoT) to filling the gap between the operational technologies and information technologies. Hence, the different architectures of IIoT are taken into consideration of research paper scope in terms of investigation and analysis. This work concentrates on the smart factory application and aims to connect between applications requirements and communication networks in the field of the smart factory in order to hold the optimum management to this aspect. Moreover, the expected cyberthreats and cyberattacks in the smart factory are captured in this work to explain the suitable countermeasures against such cyberattacks.

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A Survey on the impact of Connection-Aware Congestion Identification in RLNC-Based Networks on Quality of Service

By Syed Abid Husain Baswaraj Gadgay Shubhangi D. C.

DOI: https://doi.org/10.5815/ijwmt.2024.04.04, Pub. Date: 8 Aug. 2024

Wireless multicast networks, especially in the domains of IoT, 5G, and e-health, are experiencing a growing adoption of random linear network coding (RLNC). Nevertheless, the exponential growth of data can lead to congestion problems. This paper presents a review on novel technique called singular value decomposition (SVD) for the identification of network congestion. When SVD combines with statistical concepts like linear regression can to effectively handle large datasets and conduct comprehensive data analytics. The svd improves network performance and reliability by proactively identifying and mitigating congestion. Additionally, it improves the efficiency of data transmission and delivery in different application scenarios.

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Scheduling and Queuing Strategies for Energy Efficient Routings in WMSNs

By Ashok K Chikaraddi Meena S Maralappanavar Suvarna G Kanakaraddi Vishwanath Chikkareddi

DOI: https://doi.org/10.5815/ijwmt.2024.04.05, Pub. Date: 8 Aug. 2024

The single-path transmission protocols, cause throughput degradation for multimedia applications, considering the limited bandwidth and energy constraint of multimedia sensor nodes. Congestion on the network is a result of the issue of transferring a large amount of data. For multimedia data with low reliability, single path routing necessitates real-time Quality of Service (QoS) parameters and large bandwidth congestions that arise in intermediate nodes due to low memory. Consequently, leading to queuing delays and packet loss. Each chosen path must independently fulfill the corresponding QoS criteria while building the multiple paths for a multimedia application. Finding multiple paths with low path costs and high reliability while achieving application-specific QoS parameters is the aim of the effort.

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Smart Locker: IOT based Intelligent Locker with Password Protection and Face Detection Approach

By Niaz Mostakim Ratna R Sarkar Md. Anowar Hossain

DOI: https://doi.org/10.5815/ijwmt.2019.03.01, Pub. Date: 8 May 2019

In today’s world, security becomes a very important issue. We are always concerned about the security of our valuables. In this paper, we propose an IOT based intelligent smart locker with OTP and face detection approach, which provides security, authenticity and user-friendly mechanism. This smart locker will be organized at banks, offices, homes and other places to ensure security. In order to use this locker firstly the user have to login. User has to send an unlock request code (OTP) and after getting a feedback Email with OTP, he/she will be able to unlock the locker to access his/her valuables. We also introduce face detection approach to our proposed smart locker to ensure security and authenticity.

[...] Read more.
Performance Evaluation of Slotted Star-Shaped Dual-band Patch Antenna for Satellite Communication and 5G Services

By Md. Najmul Hossain Al Amin Islam Jungpil Shin Md. Abdur Rahim Md. Humaun Kabir

DOI: https://doi.org/10.5815/ijwmt.2023.03.05, Pub. Date: 8 Jun. 2023

The advancement of wireless communication technology is growing very fast. For next-generation communication systems (like 5G mobile services), wider bandwidth, high gain, and small-size antennas are very much needed. Moreover, it is expected that the next-generation mobile system will also support satellite technology. Therefore, this paper proposes a slotted star-shaped dual-band patch antenna that can be used for the integrated services of satellite communication and 5G mobile services whose overall dimension is 15×14×1.6 mm3. The proposed antenna operates from 18.764 GHz to 19.775 GHz for K-band satellite communication and 27.122 GHz to 29.283 GHz for 5G (mmWave) mobile services. The resonance frequencies of the proposed antenna are 19.28 GHz and 28.07 GHz having bandwidths of 1.011 GHz and 2.161 GHz, respectively. Moreover, the proposed dual-band patch antenna has a maximum radiation efficiency of 76.178% and a maximum gain of 7.596 dB.

[...] Read more.
Quantum Computers’ threat on Current Cryptographic Measures and Possible Solutions

By Tohfa Niraula Aditi Pokharel Ashmita Phuyal Pratistha Palikhel Manish Pokharel

DOI: https://doi.org/10.5815/ijwmt.2022.05.02, Pub. Date: 8 Oct. 2022

Cryptography is a requirement for confidentiality and authentic communication, and it is an indispensable technology used to protect data security. Quantum computing is a hypothetical model, still in tentative analysis but is rapidly gaining traction among scientific communities. Quantum computers have the potential to become a pre-eminent threat to all secure communication because their performance exceeds that of conventional computers. Consequently, quantum computers are capable of iterating through a large number of keys to search for secret keys or quickly calculate cryptographic keys, thereby endangering cloud security measures. This paper’s main target is to summarize the vulnerability of current cryptographic measures in front of a quantum computer. The paper also aims to cover the fundamental concept of potential quantum-resilient cryptographic techniques and explain how they can be a solution to complete secure key distribution in a post-quantum future.

[...] Read more.
Design of Dual Band Microstrip Patch Antenna for 5G Communication Operating at 28 GHz and 46 GHz

By Anurag Nayak Shreya Dutta Sudip Mandal

DOI: https://doi.org/10.5815/ijwmt.2023.02.05, Pub. Date: 8 Apr. 2023

The design of suitable compact antenna for 5G applications with superior return loss and bandwidth is still a fascinating task to the researchers. In this paper, the authors have designed a dual band microstrip patch antenna for 5G communications at 28 GHz and 46 GHz using CST studio. Rectangular patch antenna with double slots is considered to serve the purpose. The performance of the proposed patch antenna is very satisfactory in terms of return loss, VSWR, bandwidth and directivity. The values of S11 are well below -39dB and values of VSWR are very close to 1 for both resonance frequencies. The bandwidths for both cases are greater than 1.8 GHz which is an essential characteristic of 5G patch antennas for high speed connectivity and efficiency. Directivities are above 6 dB which are very suitable for the present problem. The simulation results are also compared with existing dual band 5G patch antennas and it has been observed that proposed antenna has outperformed the existing patch antennas that worked in 28GHz and 46GHz frequency range. The main advantage of this patch antenna is that it’s simple structure and good return loss, bandwidth and gain.

[...] Read more.
A Compact, Tri-Band and 9-Shape Reconfigurable Antenna for WiFi, WiMAX and WLAN Applications

By Izaz Ali Shah Shahzeb Hayat Ihtesham Khan Imtiaz. Alam Sadiq Ullah Adeel Afridi

DOI: https://doi.org/10.5815/ijwmt.2016.05.05, Pub. Date: 8 Sep. 2016

This paper introduces a novel 9-shaped multiband frequency reconfigurable monopole antenna for wireless applications, using 1.6 mm thicker FR4 substrate and a truncated metallic ground surface. The designed antenna performs in single and dual frequency modes depending on switching states. The antenna works in a single band (WiMAX at 3.5 GHz) when the switch is in the OFF state. The dual band frequency mode (Wi-Fi at 2.45 GHz and WLAN at 5.2 GHz) is obtained when the switch is turned ON. The directivities are: 2.13 dBi, 2.77 dBi and 3.99 dBi and efficiencies: 86%, 93.5% and 84.4% are attained at frequencies 2.45 GHz, 3.5 GHz and 5.2 GHz respectively. The proposed antenna has VSWR< 1.5 for all the three frequencies. The scattering and far-field parameters of the designed antenna are analyzed using computer simulation technology CST 2014. The performance of the proposed antenna is analyzed on the basis of VSWR, efficiency, gain, radiation pattern and return loss.

[...] Read more.
Adversarial Machine Learning Attacks and Defenses in Network Intrusion Detection Systems

By Amir F. Mukeri Dwarkoba P. Gaikwad

DOI: https://doi.org/10.5815/ijwmt.2022.01.02, Pub. Date: 8 Feb. 2022

Machine learning is now being used for applications ranging from healthcare to network security. However, machine learning models can be easily fooled into making mistakes using adversarial machine learning attacks. In this article, we focus on the evasion attacks against Network Intrusion Detection System (NIDS) and specifically on designing novel adversarial attacks and defenses using adversarial training. We propose white box attacks against intrusion detection systems. Under these attacks, the detection accuracy of model suffered significantly. Also, we propose a defense mechanism against adversarial attacks using adversarial sample augmented training. The biggest advantage of proposed defense is that it doesn’t require any modification to deep neural network architecture or any additional hyperparameter tuning. The gain in accuracy using very small adversarial samples for training deep neural network was however found to be significant.

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SDN Interfaces: Protocols, Taxonomy and Challenges

By Suhail Ahmad Ajaz Hussain Mir

DOI: https://doi.org/10.5815/ijwmt.2022.02.02, Pub. Date: 8 Apr. 2022

The ever-increasing demands of Internet services like video on demand, big data applications, IoE and multi-tenant data centers have compelled the network industry to change its conventional non-evolving network architecture. Software Defined Network (SDN) has emerged as a promising network architecture which provides necessary abstractions and novel APIs to facilitate network innovations and simplifies network resource management by breaking the conventional network into multiple planes. All these SDN planes interact through open interfaces or APIs which are commonly categorized into southbound, northbound and west/eastbound interfaces. In this manuscript, we have identified and emphasized various communication protocols used at south and northbound interfaces. We have provided a taxonomy of south and northbound communication protocols based on their dependence, capabilities and properties. The pros and cons associated with each communication mechanism are highlighted and the numerous research challenges and open issues involved at these two interfaces are elucidated. In addition to it, we have proposed the necessary abstractions and extensions required in communication protocols at these two interfaces to simplify real-time monitoring and virtualization in next generation networks.

[...] Read more.
Smart Home Security Using Facial Authentication and Mobile Application

By Khandaker Mohammad Mohi Uddin Shohelee Afrin Shahela Naimur Rahman Rafid Mostafiz Md. Mahbubur Rahman

DOI: https://doi.org/10.5815/ijwmt.2022.02.04, Pub. Date: 8 Apr. 2022

In this fast-paced technological world, individuals want to access all their electronic equipment remotely, which requires devices to connect over a network via the Internet. However, it raises quite a lot of critical security concerns. This paper presented a home automation security system that employs the Internet of Things (IoT) for remote access to one's home through an Android application, as well as Artificial Intelligence (AI) to ensure the home's security. Face recognition is utilized to control door entry in a highly efficient security system. In the event of a technical failure, an additional security PIN is set up that is only accessible by the owner. Although a home automation system may be used for various tasks, the cost is prohibitive for many customers. Hence, the objective of this paper is to provide a budget and user-friendly system, ensuring access to the application and home attributes by using multi-modal security. Using Haar Cascade and LBPH the system achieved 92.86% accuracy while recognizing face.

[...] Read more.
Methodologies, Requirements and Challenges of Cybersecurity Frameworks: A Review

By Alaa Dhahi Khaleefah Haider M. Al-Mashhadi

DOI: https://doi.org/10.5815/ijwmt.2023.01.01, Pub. Date: 8 Feb. 2023

As a result of the emergence of new business paradigms and the development of the digital economy, the interaction between operations, services, things, and software through numerous fields and communities may now be processed through value chains networks. Despite the integration of all data networks, computing models, and distributed software that offers a broader cloud computing, the security solution is have a serious important impact and missing or weak, and more work is needed to strengthen security requirements such as mutual entity trustworthiness, Access controls and identity management, as well as data protection, are all aspects of detecting and preventing attacks or threats. Various international organizations, academic universities and institutions, and organizations have been working diligently to establish cybersecurity frameworks (CSF) in order to combat cybersecurity threats by (CSFs). This paper describes CSFs from the perspectives of standard organizations such as ISO CSF and NIST CSF, as well as several proposed frameworks from researchers, and discusses briefly their characteristics and features. The common ideas described in this study could be helpful for creating a CSF model in general.

[...] Read more.
Investigating Coupling Interactions in Split-Ring Resonator Dimers

By Akaa Agbaeze Eteng Ngozi Peggy Udeze

DOI: https://doi.org/10.5815/ijwmt.2023.02.01, Pub. Date: 8 Apr. 2023

Topological wireless power transfer (TWPT) arrays provide directional power transfer, which are robust to external disturbances. Often realized as a chains of dimers, the ability to adjust the coupling between constituent resonator elements is an important means of establishing necessary conditions for power transfer. This paper explores the coupling interactions that are possible within dimers consisting of paired split-ring resonators (SRRs) in close proximity. Transfer efficiencies and through impedances are computationally studied for various rotational orientations of edge-and broadside-coupled SRRs. The obtained results reveal that relative rotational orientation can be employed as a sensitive design parameter to provide a variety of high- and low-coupling options within and between SRR dimers, with different power transfer efficiency implications.

[...] Read more.
Full-Wave Numerical Analysis of Dual-Band E-Patch Antenna and Reactive Loading Technique to Ascertain the Impedance Driving Point Function

By Fubara Edmund Alfred-Abam Pam Paul Gyang Fiyinfoluwa P. Olubodun

DOI: https://doi.org/10.5815/ijwmt.2023.03.03, Pub. Date: 8 Jun. 2023

This paper encompasses the numerical analysis involved with the Electromagnetic (EM) full-wave simulation tool Advanced Design System (ADS) which uses the Method of Moment (MOM) and Finite Element Method (FEM). MOM is utilized to solve Maxwell’s equations which are transformed into integral equations before discretization and boundary conditions are applied while FEM computes the electrical behavior of the high frequency EM wave distribution, and then analyze the antenna parameters. The main objective is to investigate the effect of reactive loading on the microstrip patch surface which is used to control the behavior of the impedance bandwidth and obtain dual-band frequency operation. The study further examines how the perturbed patch antenna design targets the operating frequencies of 2.4 GHz and 5.8 GHz for possible range and speed. The proposed method provides insight into the analysis of the mathematical model employed in attaining the Driving Point Impedance Function (DPF) of the E-patch microstrip patch antenna. This approach was done to quantify the reduction in reflections for improved Radio Frequency (RF) network output.

[...] Read more.
Quantum Computers’ threat on Current Cryptographic Measures and Possible Solutions

By Tohfa Niraula Aditi Pokharel Ashmita Phuyal Pratistha Palikhel Manish Pokharel

DOI: https://doi.org/10.5815/ijwmt.2022.05.02, Pub. Date: 8 Oct. 2022

Cryptography is a requirement for confidentiality and authentic communication, and it is an indispensable technology used to protect data security. Quantum computing is a hypothetical model, still in tentative analysis but is rapidly gaining traction among scientific communities. Quantum computers have the potential to become a pre-eminent threat to all secure communication because their performance exceeds that of conventional computers. Consequently, quantum computers are capable of iterating through a large number of keys to search for secret keys or quickly calculate cryptographic keys, thereby endangering cloud security measures. This paper’s main target is to summarize the vulnerability of current cryptographic measures in front of a quantum computer. The paper also aims to cover the fundamental concept of potential quantum-resilient cryptographic techniques and explain how they can be a solution to complete secure key distribution in a post-quantum future.

[...] Read more.
Design of Microstrip Patch Antenna Array

By Mohd Asaduddin Shaik Seif Shah Mohd Asim Siddiqui

DOI: https://doi.org/10.5815/ijwmt.2023.03.04, Pub. Date: 8 Jun. 2023

Throughout the years there has been a crisis for low gain and efficiency in Microstrip patch antennas. Therefore, the microstrip patch antenna was designed for better gain, directivity and efficiency using array configuration of microstrip patch antenna with low dielectric constant at 10.3GHZ resonant frequency. The proposed design is of a triangular shaped patch array and a substrate RT duroid-5880 of dielectric constant 2.2. The results after simulation shows a good return loss, bandwidth around 950Mhz-1Ghz, directivity of 11.4db in a particular direction, gain of 11.4 dB with 99% radiation effect. The design proposed is helpful for applications like military defence and communication purposes.

[...] Read more.
A Systematic Review of Privacy Preservation Models in Wireless Networks

By Namrata J. Patel Ashish Jadhav

DOI: https://doi.org/10.5815/ijwmt.2023.02.02, Pub. Date: 8 Apr. 2023

Privacy preservation in wireless networks is a multidomain task, including encryption, hashing, secure routing, obfuscation, and third-party data sharing. To design a privacy preservation model for wireless networks, it is recommended that data privacy, location privacy, temporal privacy, node privacy, and route privacy be incorporated. However, incorporating these models into any wireless network is computationally complex. Moreover, it affects the quality of services (QoS) parameters like end-to-end delay, throughput, energy consumption, and packet delivery ratio. Therefore, network designers are expected to use the most optimum privacy models that should minimally affect these QoS metrics. To do this, designers opt for standard privacy models for securing wireless networks without considering their interconnectivity and interface-ability constraints. Due to this, network security increases, but overall, network QoS is reduced. To reduce the probability of such scenarios, this text analyses and reviews various state-of-the-art models for incorporating privacy preservation in wireless networks without compromising their QoS performance. These models are compared on privacy strength, end-to-end delay, energy consumption, and network throughput. The comparison will assist network designers and researchers to select the best models for their given deployments, thereby assisting in privacy improvement while maintaining high QoS performance.Moreover, this text also recommends various methods to work together to improve their performance. This text also recommends various proven machine learning architectures that can be contemplated & explored by networks to enhance their privacy performance. The paper intends to provide a brief survey of different types of Privacy models and their comparison, which can benefit the readers in choosing a privacy model for their use.

[...] Read more.
Design of Dual Band Microstrip Patch Antenna for 5G Communication Operating at 28 GHz and 46 GHz

By Anurag Nayak Shreya Dutta Sudip Mandal

DOI: https://doi.org/10.5815/ijwmt.2023.02.05, Pub. Date: 8 Apr. 2023

The design of suitable compact antenna for 5G applications with superior return loss and bandwidth is still a fascinating task to the researchers. In this paper, the authors have designed a dual band microstrip patch antenna for 5G communications at 28 GHz and 46 GHz using CST studio. Rectangular patch antenna with double slots is considered to serve the purpose. The performance of the proposed patch antenna is very satisfactory in terms of return loss, VSWR, bandwidth and directivity. The values of S11 are well below -39dB and values of VSWR are very close to 1 for both resonance frequencies. The bandwidths for both cases are greater than 1.8 GHz which is an essential characteristic of 5G patch antennas for high speed connectivity and efficiency. Directivities are above 6 dB which are very suitable for the present problem. The simulation results are also compared with existing dual band 5G patch antennas and it has been observed that proposed antenna has outperformed the existing patch antennas that worked in 28GHz and 46GHz frequency range. The main advantage of this patch antenna is that it’s simple structure and good return loss, bandwidth and gain.

[...] Read more.
Performance Evaluation of Slotted Star-Shaped Dual-band Patch Antenna for Satellite Communication and 5G Services

By Md. Najmul Hossain Al Amin Islam Jungpil Shin Md. Abdur Rahim Md. Humaun Kabir

DOI: https://doi.org/10.5815/ijwmt.2023.03.05, Pub. Date: 8 Jun. 2023

The advancement of wireless communication technology is growing very fast. For next-generation communication systems (like 5G mobile services), wider bandwidth, high gain, and small-size antennas are very much needed. Moreover, it is expected that the next-generation mobile system will also support satellite technology. Therefore, this paper proposes a slotted star-shaped dual-band patch antenna that can be used for the integrated services of satellite communication and 5G mobile services whose overall dimension is 15×14×1.6 mm3. The proposed antenna operates from 18.764 GHz to 19.775 GHz for K-band satellite communication and 27.122 GHz to 29.283 GHz for 5G (mmWave) mobile services. The resonance frequencies of the proposed antenna are 19.28 GHz and 28.07 GHz having bandwidths of 1.011 GHz and 2.161 GHz, respectively. Moreover, the proposed dual-band patch antenna has a maximum radiation efficiency of 76.178% and a maximum gain of 7.596 dB.

[...] Read more.
Design of an IoT-Enabled Solar Tracking System For Smart Farms

By JD Motha M.W.P Maduranga NT Jayatilaka

DOI: https://doi.org/10.5815/ijwmt.2022.06.01, Pub. Date: 8 Dec. 2022

This paper presents a novel IoT system to eliminate the need for human intervention for solar panel maintenance purposes in smart farms. For the convenience of the consumer, a wireless sensing system could be implemented to automate these functions. This would eliminate the cost of any additional labor charges for panel maintenance as the system implemented would automatically calculate the position as per the current time of the day and adjust the panel's position accordingly to harvest the most amount of sun rays into the PV panel. Unlike the conventional tracking method where the panel is rotated hourly, we propose a fixed set of Sun Altitude and Azimuth angle ranges that are hardcoded to each panel position so that throughout the year whenever these angles fall out of range it jumps to the next position. The system results in a straightforward method by retrieving the current date/time from the RTC module and calculating the respective Sun Altitude and Azimuth angle to determine the position to adjust the position of the panel accordingly, thus producing effective power outputs and strong sun tracking results.

[...] Read more.
Design of the E-Patch Dual-Band Microstrip Antenna with Low Reflections for WLAN Application

By Fubara Edmund Alfred-Abam Pam Paul Gyang

DOI: https://doi.org/10.5815/ijwmt.2023.01.02, Pub. Date: 8 Feb. 2023

Antennas are either massive or miniaturized structures useful for the transmission and reception of signals associated with Electromagnetic (EM) radiation. Although Microstrip Patch Antennas (MSA) are advantageous they exhibit several drawbacks which may impair a faster communication throughput. They mostly display narrow impedance bandwidth amidst other grave issues. This study presents some approaches such as transmission line analysis and modeling for investigating the complexities associated with the MSA configurations given the shortcomings of narrow impedance bandwidth. in other to achieve the associated input impedance for the dual-band E-patch microstrip antenna. It also investigated the fabrication of the E-patch MSA which targeted the operating frequencies of 2.4 GHz and 5.8 GHz for possible range and speed. The fabricated prototype was tested using a high-frequency communication instrument known as the Vector Network Analyzer (VNA) to obtain the return loss and Voltage Standing Wave Ratio (VSWR). This method was done to quantify the reduction of reflections for enhanced Radio Frequency (RF) network output. This work helps to mitigate the challenges encountered when designing and developing microstrip patch antennas having a relatively small size in different configurations. 

[...] Read more.
Privacy Enhancing for Fog Computing based - IoT

By Samaa Y. Tarabay Ibrahim Yasser Ahmed S. Samrah Abeer T. Khalil

DOI: https://doi.org/10.5815/ijwmt.2023.03.01, Pub. Date: 8 Jun. 2023

With the massive inflation of newly developed technologies, recourse to data has become a necessity in light of the current inflation and excessive need dominating the world and developed societies. According to the control of millions of smart devices and sensors connected to an interconnected and controlled automated system within installed scales due to the services provided by IOT devices through the created fog layer that connects the cloud centers and those devices, in addition, very large amounts of that data including public and private are passed through the connection of Internet of Things devices to each other. Smart and advanced networks as one of the fog computing applications play a prominent and accurate role in the infrastructure for reliable and sound data transmission. Accordingly, the process of data aggregation is an important and common matter in the world of fog-enhancing Internet of Things, so preserving the privacy of that data is a matter of concern, and based on this principle, we propose in this paper a model for data aggregation that maintains privacy using a foggy computing environment called PPFDA (privacy preserving based- fog computing data aggregation). We use in our scheme DF homomorphic cryptosystem as it consider one of the aggregation models that ensures the privacy purpose. The theoretical results and analyzes show that our design is ensuring the privacy of data during collection using an algorithm of DF. The results confirm that the proposed scheme achieves security and privacy purposes in modern network systems for the Internet of things based in fog computing. In addition, it contributes significantly to the efficient performance of storage operations.

[...] Read more.
Methodologies, Requirements and Challenges of Cybersecurity Frameworks: A Review

By Alaa Dhahi Khaleefah Haider M. Al-Mashhadi

DOI: https://doi.org/10.5815/ijwmt.2023.01.01, Pub. Date: 8 Feb. 2023

As a result of the emergence of new business paradigms and the development of the digital economy, the interaction between operations, services, things, and software through numerous fields and communities may now be processed through value chains networks. Despite the integration of all data networks, computing models, and distributed software that offers a broader cloud computing, the security solution is have a serious important impact and missing or weak, and more work is needed to strengthen security requirements such as mutual entity trustworthiness, Access controls and identity management, as well as data protection, are all aspects of detecting and preventing attacks or threats. Various international organizations, academic universities and institutions, and organizations have been working diligently to establish cybersecurity frameworks (CSF) in order to combat cybersecurity threats by (CSFs). This paper describes CSFs from the perspectives of standard organizations such as ISO CSF and NIST CSF, as well as several proposed frameworks from researchers, and discusses briefly their characteristics and features. The common ideas described in this study could be helpful for creating a CSF model in general.

[...] Read more.