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    Enhanced efficiency in fog computing: a fuzzy data-driven machine selection strategy

    , Article International Journal of Fuzzy Systems ; Volume 26, Issue 1 , 2024 , Pages 368-389 ; 15622479 (ISSN) Zavieh, H ; Javadpour, A ; Jafari, F ; Sangaiah, A. K ; Słowik, A
    Springer  2024
    Abstract
    With the rapid proliferation of IoT and Cloud networks and the corresponding number of devices, handling incoming requests has become a significant challenge. Task scheduling problems have emerged as a common concern, necessitating the exploration of new methods for request management. This paper proposes a novel approach called the Fuzzy Inverse Markov Data Envelopment Analysis Process (FIMDEAP). Our method combines the strengths of the Fuzzy Inverse Data Envelopment Analysis (FIDEA) and Fuzzy Markov Decision Process (FMDP) techniques to enable the efficient selection of physical and virtual machines while operating in a fuzzy mode. We represent data as triangular fuzzy numbers and employ... 

    Setting up SLAs using a dynamic pricing model and behavior analytics in business and marketing strategies in cloud computing

    , Article Personal and Ubiquitous Computing ; Volume 27, Issue 6 , 2023 , Pages 2225-2241 ; 16174909 (ISSN) Gorjian Mehlabani, E ; Javadpour, A ; Zhang, C ; Ja’fari, F ; Sangaiah, A. K ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2023
    Abstract
    Increasing amounts of data are being generated every year. Sustainable computing systems have become capable of extracting and learning information from the underlying data. Edge and AI (artificial intelligence) are expanding into industrial systems requiring new computing and networking infrastructure. Due to this, SLA computing is becoming increasingly challenging to handle in these emerging cloud environments. The cloud is a service that provides virtual resources to users. Qualitative and quantitative findings in market-oriented approaches are one of the most common methods for managing virtual and physical machines in a network. When allocating services, price is an important factor to... 

    An intelligent energy-efficient approach for managing IoE tasks in cloud platforms

    , Article Journal of Ambient Intelligence and Humanized Computing ; Volume 14, Issue 4 , 2023 , Pages 3963-3979 ; 18685137 (ISSN) Javadpour, A ; Nafei, A. H ; Ja’fari, F ; Pinto, P ; Zhang, W ; Sangaiah, A. K ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2023
    Abstract
    Today, cloud platforms for Internet of Everything (IoE) are facilitating organizational and industrial growth, and have different requirements based on their different purposes. Usual task scheduling algorithms for distributed environments such as group of clusters, networks, and clouds, focus only on the shortest execution time, regardless of the power consumption. Network energy can be optimized if tasks are properly scheduled to be implemented in virtual machines, thus achieving green computing. In this research, Dynamic Voltage Frequency Dcaling (DVFS) is used in two different ways, to select a suitable candidate for scheduling the tasks with the help of an Artificial Intelligence (AI)... 

    Traffic flow control using multi-agent reinforcement learning

    , Article Journal of Network and Computer Applications ; Volume 207 , 2022 ; 10848045 (ISSN) Zeynivand, A ; Javadpour, A ; Bolouki, S ; Sangaiah, A. K ; Ja'fari, F ; Pinto, P ; Zhang, W ; Sharif University of Technology
    Academic Press  2022
    Abstract
    One of the technologies based on information technology used today is the VANET network used for inter-road communication. Today, many developed countries use this technology to optimize travel times, queue lengths, number of vehicle stops, and overall traffic network efficiency. In this research, we investigate the critical and necessary factors to increase the quality of VANET networks. This paper focuses on increasing the quality of service using multi-agent learning methods. The innovation of this study is using artificial intelligence to improve the network's quality of service, which uses a mechanism and algorithm to find the optimal behavior of agents in the VANET. The result... 

    Retracted: Using Markov predictions for handling and allocating task to virtual machines in clouds data centres

    , Article IET Communications ; Volume 17, Issue 13 , 2023 , Pages 1562-1576 ; 17518628 (ISSN) Zavieh, H ; Javadpour, A ; Li, Y ; Ja'fari, F ; Sangaiah, A. K ; Zhang, W ; Nasseri, H ; Sharif University of Technology
    John Wiley and Sons Inc  2023
    Abstract
    The above article from IET Communications, published online on 16 December 2022 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the Interim Editor-in-Chief, Jian Ren, the Institution of Engineering and Technology (the IET) and John Wiley and Sons Ltd. This article was published as part of a Guest Edited special issue. Following an investigation, the IET and the journal have determined that the article was not reviewed in line with the journal's peer review standards and there is evidence that the peer review process of the special issue underwent systematic manipulation. Accordingly, we cannot vouch for the integrity or reliability of the content. As... 

    Improving quality of service in 5G resilient communication with the cellular structure of smartphones

    , Article ACM Transactions on Sensor Networks ; Volume 18, Issue 3 , 2022 ; 15504859 (ISSN) Sangaiah, A. K ; Javadpour, A ; Pinto, P ; Ja'Fari, F ; Zhang, W ; Sharif University of Technology
    Association for Computing Machinery  2022
    Abstract
    Recent studies in information computation technology (ICT) are focusing on Next-generation networks, SDN (Software-defined networking), 5G, and 6G. Optimal working mode for device-to-device (D2D) communication is aimed at improving the quality of service with the frequency spectrum structure is of research areas in 5G. D2D communication working modes are selected to meet both the predefined system conditions and provide maximum throughput for the network. Due to the complexity of the direct solutions, we formulated the problem as an optimization problem and found the optimal working modes under different parameters of the system through extensive simulations. After determining the links'... 

    Hierarchical Clustering Based on Dendrogram in Sustainable Transportation Systems

    , Article IEEE Transactions on Intelligent Transportation Systems ; Volume 24, Issue 12 , 2023 , Pages 15724-15739 ; 15249050 (ISSN) Sangaiah, A. K ; Javadpour, A ; Ja'fari, F ; Zhang, W ; Khaniabadi, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2023
    Abstract
    Each group in a data-driven automobile network has its cluster head. A group can communicate with each other and members of other groups once it has been founded. Vehicles belonging to each group near the other group allow intergroup communication. Because nodes in automotive networks move so quickly, routing in these networks is a complex problem to solve. Each cluster in hierarchical clustering can be partitioned into multiple sub-clusters. Put another way, and the data is stored in a cluster, which is then divided into more clusters. The data is stored directly in separate clusters in non-hierarchical approaches. A dendrogram is a type of hierarchical tree. We anticipate increasing... 

    Privacy-aware and ai techniques for healthcare based on k-anonymity model in internet of things

    , Article IEEE Transactions on Engineering Management ; 2023 , Pages 1-15 ; 00189391 (ISSN) Sangaiah, A. K ; Javadpour, A ; Jafari, F ; Pinto, P ; Chuang, H ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2023
    Abstract
    The government and industry have given the recent development of the Internet of Things in the healthcare sector significant respect. Health service providers retain data gathered from many sources and are useful for patient diagnostics and research for pivotal analysis. However, sensitive personal information about a person is contained in healthcare data, which must be protected. Individual privacy protection is a crucial concern for both people and organizations, particularly when those firms must send user data to data centers due to data mining. This article investigated two general states of increasing entropy by changing the entropy of the class set of characteristics based on... 

    Enhancing energy efficiency in IoT networks through fuzzy clustering and optimization

    , Article Mobile Networks and Applications ; Volume 29, Issue 5 , 2024 , Pages 1594-1617 ; 1383469X (ISSN) Javadpour, A ; Kumar Sangaiah, A ; Zaviyeh, H ; Ja’fari, F ; Sharif University of Technology
    2024
    Abstract
    Wireless Sensor and Internet of Things (WSIoT) networks are characterized by nodes scattered throughout the environment, posing a significant challenge when it comes to battery replacement. The task of developing an algorithm that effectively reduces energy consumption in IoT networks through the utilization of artificial intelligence and fuzzy logic is a formidable one. Heuristic algorithms emerge as valuable tools in this context, capable of swiftly addressing non-deterministic polynomial problems or approximating optimal solutions with remarkable accuracy. Conversely, mathematical optimization approaches often falter due to their sluggishness or inefficiency, rendering them less suited... 

    Enhancing energy efficiency in iot networks through fuzzy clustering and optimization

    , Article Mobile Networks and Applications ; Volume 29, Issue 5 , 2024 , Pages 1594-1617 ; 1383469X (ISSN) Javadpour, A ; Kumar Sangaiah, A ; Zaviyeh, H ; Ja’fari, F ; Sharif University of Technology
    2024
    Abstract
    Wireless Sensor and Internet of Things (WSIoT) networks are characterized by nodes scattered throughout the environment, posing a significant challenge when it comes to battery replacement. The task of developing an algorithm that effectively reduces energy consumption in IoT networks through the utilization of artificial intelligence and fuzzy logic is a formidable one. Heuristic algorithms emerge as valuable tools in this context, capable of swiftly addressing non-deterministic polynomial problems or approximating optimal solutions with remarkable accuracy. Conversely, mathematical optimization approaches often falter due to their sluggishness or inefficiency, rendering them less suited... 

    SALA-IoT: self-reduced internet of things with learning automaton sleep scheduling algorithm

    , Article IEEE Sensors Journal ; Volume 23, Issue 18 , 2023 , Pages 20737-20744 ; 1530437X (ISSN) Sangaiah, A. K ; Javadpour, A ; Ja'fari, F ; Zavieh, H ; Mahmoodi Khaniabadi, S ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2023
    Abstract
    The extensive development of wireless communications has led to the popularity of self-powered Internet-of-Things (SPIoT) networks. Even though significant advances made in keeping energy consumption at a low level, making such networks live longer is still one of the biggest challenges. In particular, a significant question is how to cover the maximum range of the environment by the sensor nodes with the lowest amount of energy. In this research, we have proposed a sleep scheduling algorithm based on learning automaton for IoT (SALA-IoT), utilizing machine-learning approaches to find the optimal set of sensor nodes that can cover a wide range of the environment. This algorithm consists of... 

    Privacy-Aware and AI Techniques for Healthcare Based on K-Anonymity Model in Internet of Things

    , Article IEEE Transactions on Engineering Management ; Volume 71 , 2024 , Pages 12448-12462 ; 00189391 (ISSN) Sangaiah, A. K ; Javadpour, A ; Ja'fari, F ; Pinto, P ; Chuang, H. M ; Sharif University of Technology
    2024
    Abstract
    The government and industry have given the recent development of the Internet of Things in the healthcare sector significant respect. Health service providers retain data gathered from many sources and are useful for patient diagnostics and research for pivotal analysis. However, sensitive personal information about a person is contained in healthcare data, which must be protected. Individual privacy protection is a crucial concern for both people and organizations, particularly when those firms must send user data to data centers due to data mining. This article investigated two general states of increasing entropy by changing the entropy of the class set of characteristics based on... 

    CL-MLSP: The design of a detection mechanism for sinkhole attacks in smart cities

    , Article Microprocessors and Microsystems ; Volume 90 , 2022 ; 01419331 (ISSN) Sangaiah, A. K ; Javadpour, A ; Ja'fari, F ; Pinto, P ; Ahmadi, H ; Zhang, W ; Sharif University of Technology
    Elsevier B.V  2022
    Abstract
    This research aims to represent a novel approach to detect malicious nodes in Ad-hoc On-demand Distance Vector (AODV) within the next-generation smart cities. Smart city applications have a critical role in improving public services quality, and security is their main weakness. Hence, a systematic multidimensional approach is required for data storage and security. Routing attacks, especially sinkholes, can direct the network data to an attacker and can also disrupt the network equipment. Communications need to be with integrity, confidentiality, and authentication. So, the smart city and urban Internet of Things (IoT) network, must be secure, and the data exchanged across the network must... 

    A hybrid heuristics artificial intelligence feature selection for intrusion detection classifiers in cloud of things

    , Article Cluster Computing ; 2022 ; 13867857 (ISSN) Sangaiah, A. K ; Javadpour, A ; Ja’fari, F ; Pinto, P ; Zhang, W ; Balasubramanian, S ; Sharif University of Technology
    Springer  2022
    Abstract
    Cloud computing environments provide users with Internet-based services and one of their main challenges is security issues. Hence, using Intrusion Detection Systems (IDSs) as a defensive strategy in such environments is essential. Multiple parameters are used to evaluate the IDSs, the most important aspect of which is the feature selection method used for classifying the malicious and legitimate activities. We have organized this research to determine an effective feature selection method to increase the accuracy of the classifiers in detecting intrusion. A Hybrid Ant-Bee Colony Optimization (HABCO) method is proposed to convert the feature selection problem into an optimization problem. We... 

    A hybrid heuristics artificial intelligence feature selection for intrusion detection classifiers in cloud of things

    , Article Cluster Computing ; Volume 26, Issue 1 , 2023 , Pages 599-612 ; 13867857 (ISSN) Sangaiah, A. K ; Javadpour, A ; Ja’fari, F ; Pinto, P ; Zhang, W ; Balasubramanian, S ; Sharif University of Technology
    Springer  2023
    Abstract
    Cloud computing environments provide users with Internet-based services and one of their main challenges is security issues. Hence, using Intrusion Detection Systems (IDSs) as a defensive strategy in such environments is essential. Multiple parameters are used to evaluate the IDSs, the most important aspect of which is the feature selection method used for classifying the malicious and legitimate activities. We have organized this research to determine an effective feature selection method to increase the accuracy of the classifiers in detecting intrusion. A Hybrid Ant-Bee Colony Optimization (HABCO) method is proposed to convert the feature selection problem into an optimization problem. We... 

    Recent advances in ageing of 7xxx series aluminum alloys: A physical metallurgy perspective

    , Article Journal of Alloys and Compounds ; Volume 781 , 2019 , Pages 945-983 ; 09258388 (ISSN) Azarniya, A ; Taheri, A. K ; Taheri, K. K ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Al-Zn-Mg-Cu alloys (7xxx series Al alloys) are extensively used for their superior mechanical and corrosion performance. These properties are microstructure-sensitive and highly dependent on the formation, growth and coarsening of precipitates. To date, a wide variety of ageing procedures have been developed to tailor the evolved microstructures so as to yield a good combination of mechanical capacity and corrosion resistance of 7xxx series Al alloys. Among these methods, isothermal ageing, multi-stage ageing, non-isothermal ageing, retrogression and re-ageing (RRA), and stress ageing (i.e. creep ageing) are the most significant. In the present review, all of these approaches are... 

    Faster Algorithms for Quantitative Analysis of MCs and MDPs with Small Treewidth

    , Article 18th International Symposium on Automated Technology for Verification and Analysis, ATVA 2020, 19 October 2020 through 23 October 2020 ; Volume 12302 LNCS , 2020 , Pages 253-270 Asadi, A ; Chatterjee, K ; Kafshdar Goharshady, A ; Mohammadi, K ; Pavlogiannis, A ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2020
    Abstract
    Discrete-time Markov Chains (MCs) and Markov Decision Processes (MDPs) are two standard formalisms in system analysis. Their main associated quantitative objectives are hitting probabilities, discounted sum, and mean payoff. Although there are many techniques for computing these objectives in general MCs/MDPs, they have not been thoroughly studied in terms of parameterized algorithms, particularly when treewidth is used as the parameter. This is in sharp contrast to qualitative objectives for MCs, MDPs and graph games, for which treewidth-based algorithms yield significant complexity improvements. In this work, we show that treewidth can also be used to obtain faster algorithms for the... 

    A self-organizing multi-model ensemble for identification of nonlinear time-varying dynamics of aerial vehicles

    , Article Proceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering ; Volume 235, Issue 7 , 2021 , Pages 1164-1178 ; 09596518 (ISSN) Emami, S. A ; Ahmadi, K. K. A ; Sharif University of Technology
    SAGE Publications Ltd  2021
    Abstract
    This article presents a novel identification approach which can deal with nonlinear and time-varying characteristics of complex dynamic systems, especially an aerial vehicle in the entire flight envelope. A set of local sub-models are first developed at different operating points of the system, and subsequently a self-organizing multi-model ensemble is introduced to aggregate the outputs of the local models as a single model. The number of employed local models in the proposed multi-model ensemble is optimized using a novel self-organizing approach. Also, wavelet neural networks, which combine both the universal approximation property of neural networks and the wavelet decomposition... 

    Influence of heat treatment and aging on microstructure and mechanical properties of Mg-1.8Zn-0.7Si-0.4Ca alloy

    , Article Materialwissenschaft und Werkstofftechnik ; Volume 50, Issue 2 , 2019 , Pages 187-196 ; 09335137 (ISSN) Shaeri, M ; Taheri, K. K ; Taheri, A. K ; Shaeri, M. H ; Sharif University of Technology
    Wiley-VCH Verlag  2019
    Abstract
    In order to optimize the aging treatment of Mg-1.8Zn-0.7Si-0.4Ca alloy, different times and temperatures of solid solution and age hardening were applied to the alloy specimens. Microstructures and mechanical properties of the specimens were investigated using the optical microscopy, field emission scanning electron microscopy equipped with an energy dispersive x-ray spectrometer, x-ray diffraction, hardness, and shear punch tests. The lowest hardness and strength were achieved by solution treating of the alloy at 500 °C for 8 h, presenting the optimal condition for solution treatment of the alloy. The microstructural examinations revealed three different precipitates consisting of CaMgSi,... 

    Solute redistribution during transient liquid phase bonding of IN738LC with BNi-3 interlayer

    , Article Materials Science and Technology ; Volume 24, Issue 4 , 2008 , Pages 449-456 ; 02670836 (ISSN) Mosallaee, M ; Ekrami, A ; Ohsasa, K ; Matsuura, K ; Sharif University of Technology
    2008
    Abstract
    Redistribution of alloying elements in the transient liquid phase (TLP) bonding zone of IN738LC/ BNi-3/IN738LC was studied to investigate microstructural evolution in this area. Wavelength dispersive spectrometry and electron probe microanalysis revealed that, during non-isothermal solidification in the TLP bonding zone, enrichment of residual liquid phase with the positive segregating elements caused formation of intermetallic in the bonding zone. Scanning electron microscopy observation Indicated that the redistribution of alloying elements, between TLP bonding zone and base alloy, resulted In formation of a γ′ boundary layer, containing high density of fine γ′, around the bonding zone....