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List of Articles
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Open Access Article
1 - On the Applications and Techniques of Vehicular Ad-Hoc Networks
mohsen Norouzi ali arshaghi navid Razmjooy Mohsen ashourianVehicular Ad-Hoc Networks (VANET) models are derived from Mobile Ad-Hoc Networks that possess an impressive role in the intelligent transportation system today and also in the future. So scientists are always looking for the best theories in hope of grasping the fastest MoreVehicular Ad-Hoc Networks (VANET) models are derived from Mobile Ad-Hoc Networks that possess an impressive role in the intelligent transportation system today and also in the future. So scientists are always looking for the best theories in hope of grasping the fastest and safest connections between vehicles, to provide traffic and accident news in real time. The high number of nodes is one of the significant features of this network that results in an increase of the number of transmitted packets in the network. Distributed system and high mobility of the nodes are the other most important attributes of Vehicular Ad-Hoc networks. In this paper, we aim to review the studies and improvements of vehicular Ad-Hoc network in the fields of safety and traffic management. In addition, we introduce the most common challenges of this network and gather latest methods for resolving those problems. Multi agent systems will be one of the newest and suitable tools in this system. The main purpose is arranging safe connection between agents. Fixing agreements and removing the disputes are not detachable from functional system. It is like group associations and societies which require human collaborations and cooperation. Development of science resulted in utilization of these systems in various aspects like VANET. Nowadays scientists and researchers are interested to make use of these methods for improving the role of vehicle networks in the field of traffic management, safety and entertainment, we will review them in the following paragraphs. Manuscript profile -
Open Access Article
2 - Internet of Things in Smart Grid: A Brief Overview
nadia khiadaniTwo important technologies for smart city development are Smart Grid (SG) and Internet of Things (IoT). A smart grid is a data communication network that is on top of power grids and contributes to its efficiency by collecting and analyzing data from different parts of MoreTwo important technologies for smart city development are Smart Grid (SG) and Internet of Things (IoT). A smart grid is a data communication network that is on top of power grids and contributes to its efficiency by collecting and analyzing data from different parts of the grid. The Internet of Things, by connecting things and people to the Internet, provides access to them at any time and any place. The smart grid controls, monitors, and analyzes the power grid by using many devices that are located throughout the power grid. The smart grid, using the Internet of Things, can connect these devices and automate them and track their performance. In this article, a brief review of the architectures, technologies, applications and challenges of using IoT in SG is discussed. Manuscript profile -
Open Access Article
3 - Improving the Mean Time to Failure of the System with the New Architecture of the Main Node with the Replacement Node of Industrial Wireless Sensor Networks for Monitoring and Control using Markov Model
Ahmadreza Zamani Mohammad Ali Pourmina Ramin Shaghaghi KandovanIndustrial and physical site information is sent to the monitoring center by sensors in wireless sensor networks so that they can easily control the process of a company in order to improve the optimal performance of the system until the failure occurs to monitor and co MoreIndustrial and physical site information is sent to the monitoring center by sensors in wireless sensor networks so that they can easily control the process of a company in order to improve the optimal performance of the system until the failure occurs to monitor and control in wireless sensor networks. Sensors are exposed to a wide range of failures, possible hardware and software problems in normal conditions, extreme weather conditions or other conditions caused by harsh physical environment in the field of sensors. Therefore, there is a possibility of unpredictable failure for all types of sensors and with Industrial process monitoring, preventive status monitoring, prevented error and fault and failures. The focus of this article is to present a new architecture in improving the correct performance of the system, the replacement rate of more damaged nodes and timely replacement, at the time of the starting point of the failure, the main sensor with spare ones or healthy sensors with faulty ones. The proposed network structure is such that the spare node is placed in parallel with the main node; this method makes it possible for the spare node to be replaced in case of failure of the main node, and the failed node can be quickly repaired and put in a standby mode. Our proposed model is analyzed in terms of the average time of correct system operation until failure known as mean time to failure. In this article is presented and studied and evaluated, a new architecture to improve network performance against failure using Markov model and state probability, and mean failure rate for node fault tolerance, before failure with timely replacement in wireless sensor network. In the proposed architecture, the results show a better improvement of the system's correct performance in order to reduce the adverse effects of errors and failures and improve fault tolerance. The simulation results show that the advantage of using this method reduces the adverse effects of errors and failures and improves the optimal performance of the system in the industrial site. Manuscript profile -
Open Access Article
4 - A Honeypot-assisted Industrial Control System to Detect Replication Attacks on Wireless Sensor Networks
Abbasgholi Pashaei Mohammad Esmaeil Akbari Mina Zolfy Lighvan Asghar CharminIndustrial Control Systems (ICSs), which work based on Wireless Sensor Networks (WSNs), are prone to hacking and attacks. In node simulation attacks against ICS networks, the enemy may capture a sensor node and then make multiple copies with the same identifier (ID), co MoreIndustrial Control Systems (ICSs), which work based on Wireless Sensor Networks (WSNs), are prone to hacking and attacks. In node simulation attacks against ICS networks, the enemy may capture a sensor node and then make multiple copies with the same identifier (ID), code, and encryption of the recorded node. Unfortunately, many Intrusion Detection Systems (IDSs) are not efficient to detect clone attacks in ICSs. An alternative solution to improve the performance of early detection is a honeypot. This paper proposes a centralized architecture for detecting copy or clone nodes using a local multicast intrusion detection system. We divide the WSN into sections and give each one an inspector node. Each inspector node monitors its region and uses the node ID to identify clone nodes. We offer solutions for situations where the cluster-head is endangered. We also provide solutions for other cases where the natural node is compromised. Our evaluations show that the proposed system maximizes the detection probability and, at the same time, has a low connection overhead. Manuscript profile -
Open Access Article
5 - An Iterative Method for ASC Hybrid Precoding Structure for mmWave Ma-MIMO Systems
Amirreza Moradi Kamal Mohamed-pour Nasim Jafari FarsaniThe use of millimeter wave (mmWave) massive multiple input multiple output (Ma-MIMO) systems makes it possible to meet the essential needs of future generation wireless systems and solve the impending wireless network crisis. The mmWave Ma-MIMO Technique offers higher n MoreThe use of millimeter wave (mmWave) massive multiple input multiple output (Ma-MIMO) systems makes it possible to meet the essential needs of future generation wireless systems and solve the impending wireless network crisis. The mmWave Ma-MIMO Technique offers higher numbers of antennas and carrier frequencies. Hybrid precoding is considered as a key technique for the practical deployment of mmWave Ma-MIMO systems, since it significantly decreases the implementation costs, energy consumption, and hardware complexity. The large using of mmWave Ma-MIMO technologies in future generation wireless systems, causes imperative develop cost-effective hybrid precoding solutions that match the various application cases of these systems. The fully-connected structure can offer spectral efficiency (SE) close to the fully-digital precoding but, unfortunately with high energy consumption. Furthermore, the sub-connected structure with reduced power consumption, provides poor SE. Therefore, the trade-off between SE and energy efficiency (EE), can be made, and in this paper, we consider an adaptive sub-connected (ASC) hybrid precoding structure, where a switch network is able to provide dynamic connections from phase shifters to radio frequency (RF)chains. The simulation results indicate that in terms of SE, the proposed algorithm with ASC structure obtains higher performance than the sub-connected structure. As a result, since the ASC structure reduces the number of phase shifters, it can offer a better EE compared to the sub-connected structure. Manuscript profile -
Open Access Article
6 - Comparison of the Effect of Copper Cable Corrosion in Soil, Water and Atmospheric Environments on Telecommunication Data Transmission Speed
Zahra Mirian Hamid Nazemi Mehrdad MollanorooziCopper cables are widely used in telecommunication equipment as data transmitters. One of the problems related to the use of these cables is the corrosion of the cable surface caused by the environmental conditions of the place of use. Corrosion of cable surface leads t MoreCopper cables are widely used in telecommunication equipment as data transmitters. One of the problems related to the use of these cables is the corrosion of the cable surface caused by the environmental conditions of the place of use. Corrosion of cable surface leads to change of surface condition and formation of corrosion products on it. In this article, samples of copper cable with a diameter of 0.4 mm have been tested as a telecommunication platform for information transmission. Some parts of this cable that have already been used in the environmental conditions of soil, atmosphere and water environment were prepared. The chemical composition of the corrosion product on the cable surface was identified using X-ray diffraction analysis. On the other hand, the electrical resistance of the investigated cable and a piece of healthy and uncorroded cable were measured using an ohmmeter. Also, to determine the data transfer speed, the desired cable was placed in the path of a modem and the noise and data transfer speed measurement software of ADSL service provider companies was used. The results showed that the corrosion products formed on the surface of the cable are different in different environments. The electrical resistance of the corroded cable in the aqueous environment was the highest value and the lowest value was obtained in the ambient atmosphere. The data transmission speed was the highest in the healthy cable without corrosion and the lowest in the corroded underground cable. It was also proved that the corrosion products on the surface of the corroded cable in the soil are of CuO type and have greatly increased the electrical resistance of the cable and led to an increase in noise and a significant decrease in transmission speed. Manuscript profile -
Open Access Article
7 - Review on Recommender System and Architecture
Mehrdad MollaNorooziToday, global information societies are increasingly producing a mass of information, which makes it difficult to access relevant and useful information at the moment. In the meantime, there are many services and products that need to be filtered and presented based on MoreToday, global information societies are increasingly producing a mass of information, which makes it difficult to access relevant and useful information at the moment. In the meantime, there are many services and products that need to be filtered and presented based on the priorities of users. Recommender systems emerged as a tool to deal with the mass of data to respond to the existing need. These systems collect user information or information that helps users to provide a list of items explicitly or implicitly to suggest to users. With the flourishing of electronic commerce, the use of recommender systems in various aspects of online business has revolutionized electronic commerce Manuscript profile
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