@article{ author = {Bahadorani, Ami}, title = {Multicast computer network routing using genetic algorithm and ant colony}, abstract ={Due to the growth and development of computer networks, the importance of the routing topic has been increased. The importance of the use of multicast networks is not negligible nowadays. Many of multimedia programs need to use a communication link to send a packet from a sender to several receivers. To support such programs, there is a need to make an optimal multicast tree to indicate the optimal routes from the sending source to the corresponding sinks.  Providing an optimal tree for routing is a complicated problem. In this paper, we are looking forward a method for routing of multicast networks with considering some parameters such as the cost and delay. Also, this paper has emphasized the issue that every parameter in routing problem has different value for different packets. And in accordance to these parameters optimal routing multicast trees are proposed. To gain this end, the genetic algorithm and ant colony optimization approaches are adopted. The simulation results show that the presented algorithms are able to produce optimal multicast trees subject to the packets.}, Keywords = {genetic algorithm, ant colony, routing, computer networks}, volume = {9}, Number = {31}, pages = {1-12}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-959-en.html}, eprint = {http://jor.iranaict.ir/article-1-959-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {hajimohseni, sadegh and doostari, mohammadali and ghaznavighoushchi, mohammadbagher}, title = {Hardwar Trojan classification and implementation and offer a new detection approach}, abstract ={A hardware attack that enables the attacker to alter the main circuit with malicious hardware during either design or the fabrication process is studied and analyzed. This attack, known as the hardware Trojan, has different objectives such as destroying hardware, changing circuit characteristics or extracting sensitive information. So hardware Trojan detection and hardware security are critical issues. First, we categorize the Trojans and Trojan detection methods and then implement four types of Trojan on DES algorithm. Then a hardware approach to the detection of hardware Trojans based on the characteristics of circuit delay is proposed. In this approach, ring oscillator frequencies are inputs of the circuit under test, and output is a string of bits corresponding to challenges. The proposed hardware is designed to address any changes in the main circuit that would affect the frequency of the ring oscillator factors, such as temperature, voltage, and process variations that influence the frequency of the ring oscillator are analyzed, and a suitable ring oscillator is recommended for embedding into the circuit. As a result, the frequency variation will be reduced dramatically, and it can be determined with higher certainty whether changes in frequency are result of a possible Trojan.As a result the output bit string, which is now unaffected by frequency changes due to process variation, can be used as a measure to detect hardware Trojans.}, Keywords = {Hardware Trojan,Trojan detection,Ring oscillator,maliciouse changes}, volume = {9}, Number = {31}, pages = {13-32}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-176-en.html}, eprint = {http://jor.iranaict.ir/article-1-176-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {rezaei-malek, narges and rezaei_malek, mohamad and tavakoli-moghadam, rez}, title = {Model to improve banking by Using customer knowledge management and Mobile Banking and Its Impact on Customer Loyalty}, abstract ={With progress of communication technology in the past two decades, use of ICT has become a success factor in the world of competition. To increase competition in the banking industry of Iran, many banks are willing to offer a unique service to their customers. Investment of private banks has concentrated on the presenting special services. That has led to more successful in attracting and retaining customers. To evaluate the influencing factors on banking services improvement, information technology and knowledge management as key factors were identified. This paper is to identify the most effective indicators to assess the impact of knowledge management and information technology for improving customer service of bank on customer satisfaction.180 experts of Bank Mellat is selected as population. Sample size was calculated by using a random sampling method. 130 samples were obtained but 120 questionnaires Were returned. Data were collected through questionnaires. In order to analyze the data from the structural equation modeling and LISREL software was used. In order to ensure the accuracy of the results and sensitivity analysis, regression analysis were applied. Finally, the results show that the customer knowledge management and mobile banking have positive effect on performance of banking service, and improving this kind of services have positive effects on customer satisfaction.}, Keywords = {service management, customer knowledge management, mobile banking, structure equation model, Mellat Bank.}, volume = {9}, Number = {31}, pages = {33-44}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-328-en.html}, eprint = {http://jor.iranaict.ir/article-1-328-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Beheshtinejad, Raheleh and Samie, Mohammad Ebrahim and Hamzeh, Ali}, title = {IMPROVE THE RECOMMENDER SYSTEM USING SEMANTIC WEB}, abstract ={To buy his/her necessities such as books, movies, CD, music, etc., one always trusts others’ oral and written consultations and offers and include them in his/her decisions. Nowadays, regarding the progress of technologies and development of e-business in websites, a new age of digital life has been commenced with the Recommender systems. The most important objectives of these systems include attracting the customers and their confidences by detecting their interests and tastes and recommending them the most appropriate offer. Using the relationships between entities in the DBpedia ontology, this study tries to investigate the application of and extracting the information in the movie area. In the next step, the structure of Recommender System is designed and its performance is evaluated using information extracted from "MovieLens" database. This study’s endeavor is to present a comprehensive overview of Recommender systems and a proposed method based on the benefits of semantic web databases, along with the implementation compared to existing methods. Our results indicate that the proposed method outperforms in terms of efficiency and performance.}, Keywords = {Recommender System, Ontology, Semantic web, DBpedia}, volume = {9}, Number = {31}, pages = {45-56}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-452-en.html}, eprint = {http://jor.iranaict.ir/article-1-452-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Mahjour, Ali and shahsavari, mehr}, title = {Present an Initial Estimation Method for Logical Transaction-based Software Projects}, abstract ={The first and most basic requirement for successful entry of a project, is have a realistic and reasonable estimation. In this paper, in order to increase accuracy of software projects estimation and reduce complexity of estimation process, we introduce a method called the "Logical Transaction Point (LTP)". Our method is most appropriate for transactional software. By use of this method can estimate the total size of use-case's and size of the whole software. In this paper we will prove the more accurate the same technique as UCP method and Due to more transparency and simplicity, its deployment is easier. We provide the main basis for this method, the degree of functional point analysis (FPA) and estimation the degree of use case point (UCP).}, Keywords = {Software Project Estimation, Usecase Point, Function Point, Constructive Cost Model, Transaction Point}, volume = {9}, Number = {31}, pages = {57-66}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-367-en.html}, eprint = {http://jor.iranaict.ir/article-1-367-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Khunjush, Farshad and Aashori, Mi}, title = {Investigating the Effects of Hardware Parameters on Power Consumptions in SPMV Algorithms on Graphics Processing Units (GPUs)}, abstract ={Although Sparse matrix-vector multiplication (SPMVs) algorithms are simple, they include important parts of Linear Algebra algorithms in Mathematics and Physics areas. As these algorithms can be run in parallel, Graphics Processing Units (GPUs) has been considered as one of the best candidates to run these algorithms. In the recent years, power consumption has been considered as one of the metrics that should be taken into consideration in addition to performance.  In spite of this importance, to the best of our knowledge, studies on power consumptions in SPMVs algorithms on GPUs are scarce.  In this paper, we investigate the effects of hardware parameters on power consumptions in SPMV algorithms on GPUs. For this, we leverage the possibility of setting the GPU’s parameters to investigate the effects of these parameters on power consumptions. These configurations have been applied to different formats of Sparse Matrices, and the best parameters are selected for having the best performance per power metric. Therefore, as the results of this study the settings can be applied in running different Linear Algebra algorithms on GPUs to obtain the best performance per power.}, Keywords = {SPMV, Power Consumptions, Performance, GPUs, Hardware Parameters}, volume = {9}, Number = {31}, pages = {67-78}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1289-en.html}, eprint = {http://jor.iranaict.ir/article-1-1289-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Omrani, Mahdi and Shafiee, Masoud and Khorsandi, Siavash}, title = {Cyber Threats Foresight Against Iran Based on Attack Vector}, abstract ={Cyber ​​threats have been extraordinary increased in recent years. Cyber ​​attackers, including government agencies or hackers, have made significant advances in the use of various tools for attacking target systems in some countries particularly on Islamic republic of Iran. The complexity of cyber threats and the devastating effects of them on critical systems highlights necessity of cyber threats Foresight. This research can prepare the country for countering cyber threats based on existing and potential attack Vectors. First of all, 18 major cyber threats drivers base on attack Vectors through reviewing resources and interviewing with seven experts were identified. We use cross-impact analysis Future studies method to indicate main drivers of future cyber threats such as social engineering, Denial of service, ransomwares, spoofing and fraud and non-state actors. Mic Mac software will be used for this step. Finally, future scenarios for cyber threats were identified by using scenario-based approach. Scenario Wizard software will be used. The results of the research include two strong scenarios and 18 possible scenarios, based on the strongest scenario, ransomware, spoofing, fraud, social engineering and Denial of service are the most likely cyber threats by non-state actors through in a limited level}, Keywords = {Foresight, cyber threats, attack Vector, cross-impact analysis,senario}, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1448-en.html}, eprint = {http://jor.iranaict.ir/article-1-1448-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Tajeddini, Shima and Danyali, Habibollah and Helfroush, Mohammad Sadegh and Fatemi, Yaghoub}, title = {The Participation of Three Brain Tissues in Alzheimer’s disease Diagnosis from Structural MRI}, abstract ={Alzheimer’s disease (AD) is a progressive and irreversible disease which gradually makes patients unable to do their daily routines. Although the present treatments can not cure the disease completely, its early detection can reduce symptoms and enhance the patients’ life quality. In the current literature, using the grey matter (GM) tissue which is known as an appropriate biomarker is highly common in AD diagnosis. However, two other brain tissues known as cerebrospinal fluid (CSF) and white matter (WM) seem to reveal beneficial information about the patients’ brain changes. The aim of the present study is to develop an automatic system for the early diagnosis of Alzheimer’s disease from structural MRI by simultaneously considering suitable features of all GM, CSF and WM tissues. A SVM-RBF classifier is trained and evaluated on the OASIS database to separate AD from healthy control (HC) subjects. The obtained results represent higher accuracy and sensitivity of the proposed algorithm in comparison with similar method.}, Keywords = {Alzheimer’s disease, Biomarker, Classification, Feature extraction, Magnetic resonance imaging}, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1449-en.html}, eprint = {http://jor.iranaict.ir/article-1-1449-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {noroozy, Hamed and Jam, Shahrokh}, title = {Parametric analysis of a broadband Archimedean spiral antenna with cavity}, abstract ={In this article an Archimedean spiral antenna is designed and analyzed that has good operation in broadband application. By analyzing this design, the effects that different parameters have on antenna operation will be studied and ways of optimization will be found.  Influences of cavity height and number of turns to obtain good matching and gain in a frequency interval of 4 to 18 GHz will be discussed. In addition, using cavity wall around the antenna, side lobes are decreased or deleted. By tapering the arms at feeding center, better matching will be attained. For making S11 bandwidth better, increasing the cavity height or reducing the number of turns can be used. Changing number of turns does not have a significant effect on the gain. To improve the antenna gain, the cavity height needs to be adjusted such that the reflected wave from cavity and radiated wave from spiral arms are constructing.}, Keywords = {Archimedean spiral antenna, cavity, broadband antenna, gain, babinet principle}, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1450-en.html}, eprint = {http://jor.iranaict.ir/article-1-1450-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Sharifi, Masumeh and Nozhat, Najmeh}, title = {Improving the directivity of the plasmonic sectoral horn nanoantenna using lens in its aperture}, abstract ={Horn antennas can result in good impedance matching between the waveguide and free space due to the gradual increase in the aperture size. In this paper, a novel plasmonic sectoral horn nanoantenna based on using lens in the aperture is proposed. It is investigated that in addition to improvement of the directivity, the reflection coefficient is also reduced using the proper lens structure. The maximum directivity improvement is about 2 dBi compared to the structure without lens. Also, it is shown that the radiation pattern can be controlled by utilizing electro-optical material as the lens}, Keywords = {Directivity, Electro-optic effect, Plasmonic Horn Nanoantenna, Reflection Coefficient.}, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1451-en.html}, eprint = {http://jor.iranaict.ir/article-1-1451-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Amiri, Samira and Nozhat, Najmeh}, title = {Improvement of the bulk sensitivity and FoM of the plasmonic nanodipole antenna array}, abstract ={In this paper, the sensitivity of a plasmonic nanodipole antenna array for different materials of the metal nanodipole and substrate is calculated by changing the refractive index of the surrounding medium. The performance of our proposed array is studied at two wavelengths of 1310 and 1550 nm, the wavelengths of the second and third telecommunications windows. It is shown that by using the silver (Ag) nanodipole instead of the gold (Au) one, the bulk sensitivity of the nanostructure is improved. By replacing the substrate material from Si to SiO2, the sensitivity increases up to 1220 and 1150 nm/RIU at the wavelengths of 1310 and 1550 nm, respectively, that is very suitable for sensing applications. Moreover, the figure of merit (FoM) of the plasmonic sensor is calculated for both substrates and nanodipole materials. The maximum value of the FoM is obtained for the nanoantenna array with SiO2 substrate and Ag nanodipole and it is equal to 14.35. Furthermore, it is shown that by increasing the thickness of the nanodipole, the nanostructure sensitivity and FoM are enhanced}, Keywords = {Figure of Merit (FoM), Nanoantenna, Optical Response, Sensitivity, Sensor. }, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1452-en.html}, eprint = {http://jor.iranaict.ir/article-1-1452-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Ghavami, Hossein and ShirvaniMoghaddam, Shahriar}, title = {Performance Analysis of Device to Device Communications Overlaying/Underlaying Cellular Network}, abstract ={Minimizing the outage probability and maximizing throughput are two important aspects in device to device (D2D) communications, which are greatly related to each other. In this paper, first, the exact formulas of the outage probability for D2D communications underlaying or overlaying cellular network are derived which jointly experience Additive White Gaussian Noise (AWGN) and Rayleigh multipath fading. Then, simulation results of the exact formulas and previously respected approximate formulas are compared in MATLAB for both underlay and overlay scenarios. It is shown that the approximate formula in underlay scenario is a good estimate for exact one while approximate formula for overlaying scenario is a good approximation when the average distance between the transmit/receive nodes of D2D pair is less than half of the maximum distance between these nodes or variance of multipath fading is greater than 1.5. In addition, the probability density functions of Signal to Interference plus Noise Ratio (SINR) for underlay and overlay scenarios are found. Moreover, a new scenario is proposed which jointly considers overlay and underlay scenarios. Furthermore, exact and approximate formulas for outage probability and throughput of D2D users in the proposed scenario are derived. Finally, these formulas are compared to underlay and overlay scenarios in three special cases, low, moderate and high traffic loads}, Keywords = {Device to Device Communications, Overlay, Underlay, Outage probability, Throughput.}, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1453-en.html}, eprint = {http://jor.iranaict.ir/article-1-1453-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} } @article{ author = {Niroomand, Hamed and Chabok, Hossein and Pakniyat, Samane}, title = {A design of Rectangular Waveguide TM11 to TE10 Mode Converter for S-band Applications}, abstract ={A design of a compact, easy to fabricate and applicable structure rectangular waveguide TM11 to TE10 mode converter is presented in this paper. The design procedure of the proposed structure can be divided into two parts in sequence. The beginning one is dedicated to the transformation from TM11 to TEM mode using a central conductor, while the second part is the transformation from TEM to TE10 mode using a dielectric loaded waveguide carrying out 180o phase shift. The proposed structure has the advantage of high efficiency of above 90 %, which are demonstrated in simulation results}, Keywords = {Mode converter, S-band applications, TM11 to TE10 mode conveter,high power microwave (HPM) applications}, volume = {9}, Number = {33}, pages = {0-0}, publisher = {): Association of Information & Communication Technology of Iran}, url = {http://jor.iranaict.ir/article-1-1454-en.html}, eprint = {http://jor.iranaict.ir/article-1-1454-en.pdf}, journal = {}, issn = {}, eissn = {}, year = {2019} }