Loading...
Search for:
amiri--m
0.007 seconds
Total 28 records
Project buffer sizing and dynamic buffer consumption algorithm in power generation construction
, Article Engineering, Construction and Architectural Management ; Volume 29, Issue 2 , 2022 , Pages 716-738 ; 09699988 (ISSN) ; Khalilzadeh, M ; Amiri, M ; Shadrokh, S ; Sharif University of Technology
Emerald Group Holdings Ltd
2022
Abstract
Purpose: The aim of this research is to propose a buffer sizing and buffer controlling algorithm (BSCA) as a heuristic algorithm for calculating project buffer and feeding buffers as well as dynamic controlling of buffer consumption in different phases of a wind power plant project in order to achieve a more realistic project duration. Design/methodology/approach: The BSCA algorithm has two main phases of planning and buffer sizing and construction and buffer consumption. Project buffer and feeding buffers are determined in the planning and buffer sizing phase, and their consumption is controlled in the construction and buffer consumption phase. The heuristic algorithm was coded and run in...
Markhor: malware detection using fuzzy similarity of system call dependency sequences
, Article Journal of Computer Virology and Hacking Techniques ; Volume 18, Issue 2 , 2022 , Pages 81-90 ; 22638733 (ISSN) ; Parsa, S ; Amiri, M. J ; Sharif University of Technology
Springer-Verlag Italia s.r.l
2022
Abstract
Static malware detection approaches are time-consuming and cannot deal with code obfuscation techniques. Dynamic malware detection approaches, on the other hand, address these two challenges, however, suffer from behavioral ambiguity, such as the system calls obfuscation. In this paper, we introduce Markhor, a dynamic and behavior-based malware detection approach. Markhor uses system call data dependency and system call control dependency sequences to create a weighted list of malicious patterns. The list is then used to determine the malicious processes. Next, the similarity of a file system call sequences to a malicious pattern is extracted based on a fuzzy algorithm and the file nature is...
A fuzzy project buffer management algorithm: a case study in the construction of a renewable project
, Article International Journal of Construction Management ; 2022 ; 15623599 (ISSN) ; Vanhoucke, M ; Khalilzadeh, M ; Amiri, M ; Shadrokh, S ; Sharif University of Technology
Taylor and Francis Ltd
2022
Abstract
One of the major problems with projects is that they are not completed according to schedule. Uncertainty always exists at the heart of real-world project scheduling problems. This paper introduces a fuzzy project buffer management (FPBM) algorithm which is a combination of the adaptive procedure with resource tightness (APRT) and fuzzy failure mode and effects analysis (FFMEA) methods. This paper aims to present an efficient model for project buffer sizing by taking FFMEA into account to reach a more realistic schedule. In this research, for increasing the efficiency of the APRT method, the FFMEA technique is simultaneously applied with them. This research was carried out as a case study in...
Modified joint channel-and-data estimation for one-bit massive MIMO
, Article 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021, 22 May 2021 through 28 May 2021 ; Volume 2021-May , 2021 ; 02714310 (ISSN); 9781728192017 (ISBN) ; Rasoulinezhad, Ramin ; Amiri, M ; Gilani, F ; Saadatnejad, S ; Nezamalhosseini, A. R ; Shabany, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
Centralized and cloud computing-based network architectures are the promising tracks of future communication systems where a large scale compute power can be virtualized for various algorithms. These architectures rely on high-performance communication links between the base stations and the central computing systems. On the other hand, massive Multiple-Input Multiple-Output (MIMO) technology is a promising solution for base stations toward higher spectral efficiency. To reduce system complexity and energy consumption, 1-bit analog-to-digital converters (ADCs) are leveraged with the cost of lowering the signal quality. To recover the lost information, more sophisticated algorithms, like...
Markhor: malware detection using fuzzy similarity of system call dependency sequences
, Article Journal of Computer Virology and Hacking Techniques ; 2021 ; 22638733 (ISSN) ; Parsa, S ; Amiri, M. J ; Sharif University of Technology
Springer-Verlag Italia s.r.l
2021
Abstract
Static malware detection approaches are time-consuming and cannot deal with code obfuscation techniques. Dynamic malware detection approaches, on the other hand, address these two challenges, however, suffer from behavioral ambiguity, such as the system calls obfuscation. In this paper, we introduce Markhor, a dynamic and behavior-based malware detection approach. Markhor uses system call data dependency and system call control dependency sequences to create a weighted list of malicious patterns. The list is then used to determine the malicious processes. Next, the similarity of a file system call sequences to a malicious pattern is extracted based on a fuzzy algorithm and the file nature is...
Temperature-responsive smart nanocarriers for delivery of therapeutic agents: applications and recent advances
, Article ACS Applied Materials and Interfaces ; Volume 8, Issue 33 , 2016 , Pages 21107-21133 ; 19448244 (ISSN) ; Sahandi Zangabad, P ; Ghasemi, A ; Amiri, M ; Bahrami, M ; Malekzad, H ; Ghahramanzadeh Asl, H ; Mahdieh, Z ; Bozorgomid, M ; Ghasemi, A ; Rahmani Taji Boyuk, M. R ; Hamblin, M. R ; Sharif University of Technology
American Chemical Society
2016
Abstract
Smart drug delivery systems (DDSs) have attracted the attention of many scientists, as carriers that can be stimulated by changes in environmental parameters such as temperature, pH, light, electromagnetic fields, mechanical forces, etc. These smart nanocarriers can release their cargo on demand when their target is reached and the stimulus is applied. Using the techniques of nanotechnology, these nanocarriers can be tailored to be target-specific, and exhibit delayed or controlled release of drugs. Temperature-responsive nanocarriers are one of most important groups of smart nanoparticles (NPs) that have been investigated during the past decades. Temperature can either act as an external...
Towards a goal-driven method for web service choreography validation
, Article 2016 2nd International Conference on Web Research, ICWR 2016, 27 April 2016 through 28 April 2016 ; 2016 , Pages 66-71 ; 9781509021666 (ISBN) ; Ebrahimifard, A ; Amiri, M. J ; Khoramabadi Arani, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2016
Abstract
Nowadays web services composition that presents capabilities in response to customers' complex requirements has a special importance in real businesses. However, service choreography as a form of service composition, still faces many challenges. One of the most important challenges of the choreography domain is how to validate the model based on the corresponding requirements. To this end, in this paper processes choreographies are modeled using the interaction view of BPMN 2.0 standard. Then, goal modeling is suggested to extract the requirements. For each requirement all possible valid scenarios are considered and finally using Savara tool, the requirements' scenarios are modeled and the...
Smart micro/nanoparticles in stimulus-responsive drug/gene delivery systems
, Article Chemical Society Reviews ; Volume 45, Issue 5 , 2016 , Pages 1457-1501 ; 03060012 (ISSN) ; Ghasemi, A ; Sahandi Zangabad, P ; Rahighi, R ; Moosavi Basri, S. M ; Mirshekari, H ; Amiri, M ; Shafaei Pishabad, Z ; Aslani, A ; Bozorgomid, M ; Ghosh, D ; Beyzavi, A ; Vaseghi, A ; Aref, A. R ; Haghani, L ; Bahrami, S ; Hamblin, M. R ; Sharif University of Technology
Royal Society of Chemistry
2016
Abstract
New achievements in the realm of nanoscience and innovative techniques of nanomedicine have moved micro/nanoparticles (MNPs) to the point of becoming actually useful for practical applications in the near future. Various differences between the extracellular and intracellular environments of cancerous and normal cells and the particular characteristics of tumors such as physicochemical properties, neovasculature, elasticity, surface electrical charge, and pH have motivated the design and fabrication of inventive "smart" MNPs for stimulus-responsive controlled drug release. These novel MNPs can be tailored to be responsive to pH variations, redox potential, enzymatic activation, thermal...
Carbon nanotubes part I: Preparation of a novel and versatile drug-delivery vehicle
, Article Expert Opinion on Drug Delivery ; Volume 12, Issue 7 , 2015 , Pages 1071-1087 ; 17425247 (ISSN) ; Solati, N ; Amiri, M ; Mirshekari, H ; Mohamed, E ; Taheri, M ; Hashemkhani, M ; Saeidi, A ; Estiar, M. A ; Kiani, P ; Ghasemi, A ; Basri, S. M. M ; Aref, A. R ; Hamblin, M. R ; Sharif University of Technology
Informa Healthcare
2015
Abstract
Introduction: It is 23 years since carbon allotrope known as carbon nanotubes (CNT) was discovered by Iijima, who described them as "rolled graphite sheets inserted into each other". Since then, CNTs have been studied in nanoelectronic devices. However, CNTs also possess the versatility to act as drug- and gene-delivery vehicles.Areas covered: This review covers the synthesis, purification and functionalization of CNTs. Arc discharge, laser ablation and chemical vapor deposition are the principle synthesis methods. Non-covalent functionalization relies on attachment of biomolecules by coating the CNT with surfactants, synthetic polymers and biopolymers. Covalent functionalization often...
Carbon nanotubes part II: A remarkable carrier for drug and gene delivery
, Article Expert Opinion on Drug Delivery ; Volume 12, Issue 7 , 2015 , Pages 1089-1105 ; 17425247 (ISSN) ; Solati, N ; Ghasemi, A ; Estiar, M. A ; Hashemkhani, M ; Kiani, P ; Mohamed, E ; Saeidi, A ; Taheri, M ; Avci, P ; Aref, A. R ; Amiri, M ; Baniasadi, F ; Hamblin, M. R ; Sharif University of Technology
Informa Healthcare
2015
Abstract
Introduction: Carbon nanotubes (CNT) have recently been studied as novel and versatile drug and gene delivery vehicles. When CNT are suitably functionalized, they can interact with various cell types and are taken up by endocytosis.Areas covered: Anti-cancer drugs cisplatin and doxorubicin have been delivered by CNT, as well as methotrexate, taxol and gemcitabine. The delivery of the antifungal compound amphotericin B and the oral administration of erythropoietin have both been assisted using CNT. Frequently, targeting moieties such as folic acid, epidermal growth factor or various antibodies are attached to the CNT-drug nanovehicle. Different kinds of functionalization (e.g., polycations)...
Analysis and characterization of microstructural evolutions, mechanical response and fracture mechanism of laser welded Fe-Co-V ultra-thin foils
, Article Optics and Laser Technology ; Volume 68 , 2015 , Pages 211-219 ; 00303992 (ISSN) ; Shamanian, M ; Monirvaghefi, S. M ; Behjati, P ; Hasani, S ; Fathi Moghaddam, M ; Amiri, M ; Szpunar, J. A ; Sharif University of Technology
Elsevier Ltd
2015
Abstract
The welding behavior of the Fe-Co-7 wt% V ultra-thin foils was examined using the Nd:YAG laser welding method. Scanning electron microscopy and electron backscattered diffraction were used to investigate microstructural changes and fracture mechanism of the weld joints. Tensile test and microhardness measurement were employed in order to study the mechanical behaviors of the welds. Microstructural observations indicated that a bimodal grain size distribution is seen in the fusion zone. It was found that the fracture surfaces of the welds consist of both cleavage sites and dimples. It was also revealed that the cleavage sites are mainly located in the coarse grain zone while numerous dimples...
Structure, texture and magnetic properties of laser-welded ultrathin Fe-Co-V foils
, Article Acta Metallurgica Sinica (English Letters) ; Volume 28, Issue 3 , March , 2015 , Pages 338-347 ; 10067191 (ISSN) ; Shamanian, M ; Monirvaghefi, S. M ; Behjati, P ; Szpunar, J. A ; Amiri, M ; Fathi Moghadam, M ; Sharif University of Technology
Chinese Society for Metals
2015
Abstract
This research aims to investigate the effect of pulsed Nd:YAG laser micro-welding on the microstructure, texture and magnetic properties of ultra-thin Fe-Co-7.15 wt% V magnetic alloy. Optical microscopy, scanning electron microscopy and electron backscattered diffraction techniques were used to study the microstructural evolutions. Also, vibrating sample magnetometry was used to characterize the magnetic properties. The results showed that the fractions of low Σ coincidence site lattice boundaries in the fusion zone are higher than those of the base metal. The welded samples experience a significant decrease in their magnetic properties. It was found that the formation of new fiber texture...
Effects of diverging angle and fuel molecular weight on NOx emissions in converging and diverging ducts
, Article Journal of Engineering Research ; Volume 1, Issue 3 , 2013 , Pages 161-179 ; 23071885 (ISSN) ; Amiri, M ; Amiri, A ; Sharif University of Technology
2013
Abstract
The present paper developed and validated a numerical procedure for the calculation of turbulent combustive flows in converging and diverging ducts. Through simulation of the heat transfer processes, the amounts of production and spread of NOx pollutants were measured. Also, this paper reported the results of a numerical investigation of the effects of the fuel Molecular Weight on NOx emissions in converging and diverging ducts. The fuels which were examined were methane, naphtha, and kerosene. The differential equations in the Von-Misses coordinate system were transformed to a cross-stream coordinate system in order to concentrate more grid lines near wall boundaries. A marching integration...
Effect of annealing temperature on growth of Ce-ZnO nanocomposite thin films: X-ray photoelectron spectroscopy study
, Article Thin Solid Films ; Volume 520, Issue 2 , November , 2011 , Pages 721-725 ; 00406090 (ISSN) ; Azimirad, R ; Amiri, M ; Moshfegh, A. Z ; Sharif University of Technology
2011
Abstract
Ce-doped ZnO nanocomposite thin films with Ce/Zn ratio fixed at optimum value (10 at.%) have been prepared via sol-gel method at different annealing temperatures varied from 180 to 500 °C. The synthesized samples were characterized employing atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) techniques. According to AFM analysis, the average grain size increased from about 70 nm to 150 nm by increasing the annealing temperature from 300 to 500 °C. Moreover, based on the XPS data analysis, it was found that three major metal ions namely Ce 3+, Ce4+, and Zn2+ coexist on the surface of the nanocomposite films. XPS data analysis also revealed that...
Enhanced electrochemical hydrogen storage by catalytic Fe-doped multi-walled carbon nanotubes synthesized by thermal chemical vapor deposition
, Article Journal of Power Sources ; Volume 188, Issue 2 , 2009 , Pages 404-410 ; 03787753 (ISSN) ; Mortazavi, S.Z ; Moshfegh, A.Z ; Golikand, A.N ; Amiri, M ; Sharif University of Technology
2009
Abstract
Hydrogen storage capacities of raw, oxidized, purified and Fe-doped multi-walled carbon nanotubes (MWCNTs) were studied by electrochemical method. Based on transmission electron microscopy and Raman spectroscopic data, thermal oxidation removed defective graphite shells at the outer walls of MWCNTs. The analysis results indicated that the acid treatment dissolved most of the catalysts and opened some tips of the MWCNTs. Thermal gravimetric analysis and differential scanning calorimetry results illustrated that by oxidation and purification of MWCNTs, the weight loss peak shifts toward a higher temperature. N2 adsorption isotherms of the purified and oxidized MWCNTs showed an increase in N2...
A low overhead fault detection and recovery method for the faults in clock generators
, Article 2009 IEEE Circuits and Systems International Conference on Testing and Diagnosis, ICTD'09, Chengdu, 28 April 2009 through 29 April 2009 ; 2009 ; 9781424425877 (ISBN) ; Amiri, M. A ; Ejlali, A ; Sharif University of Technology
2009
Abstract
In many synchronous digital systems especially those used in mobile applications, the system is exposed to sever shaking that may lead to a failure in the clock generator. In this paper we present an effective method to tolerate the faults on the clock signal that are due to defects in external oscillators. Our technique utilizes no Phase-Lock Loops (PLL), no Delay-Locked Loops (DLL) and no high frequency oscillators because of their drawbacks so that it needs neither more effort to meet Electro-Magnetic Compatibility (EMC) and requirements nor extra hardware to implement DLLs. We have formally evaluated the meta-stability of our technique. This evaluation shows that our technique reliably...
Voltammetric determination of thiocytosine based on its electrocatalytic oxidation on the surface of carbon-paste electrode modified with cobalt schiff base complexes
, Article Journal of Solid State Electrochemistry ; Volume 11, Issue 8 , 2007 , Pages 1133-1138 ; 14328488 (ISSN) ; Amiri, M ; Sharif University of Technology
2007
Abstract
The electrochemical oxidation of thiocytosine on the surface of carbon-paste electrode modified with Schiff base (salophen derivatives) complexes of cobalt is studied. The effect of the substituents in the structure of salophen on the catalytic property of the modified electrode is investigated by using cyclic and differential pulse voltammetry. Cobalt (II)-5-nitrosalophen, because of its electrophilic functional groups, leads to a considerable enhancement in the catalytic activity, sensitivity (peak current), and a marked increase in the anodic potential of the modified electrode. The differential pulse voltammetry is applied as a very sensitive method for the detection of thiocytosine. The...
Multi-walled carbon nanotube paste electrode for selective voltammetric detection of isoniazid
, Article Microchimica Acta ; Volume 157, Issue 3-4 , 2007 , Pages 149-158 ; 00263672 (ISSN) ; Amiri, M ; Sharif University of Technology
2007
Abstract
A multi-walled carbon nanotube paste electrode (MWCPE) is prepared as an electrochemical sensor with high sensitivity and selectivity in responding to isoniazid. The electrochemical oxidation of isoniazid is investigated in buffered solution by cyclic and differential pulse voltammetry. The electrode is shown to be very effective for the detection of isoniazid in the presence of other biological reductant compounds. The electrochemical oxidation of cysteine, due to the high overvoltage, is completely stopped at the surface of MWCPE. The electrode exhibits a very good resolution between the voltammetric peak of isoniazid and the peaks of ascorbic acid (AA) and dopamine (DA). A resolution of...
Evaluation of babbling idiot failures in FlexRay-based networkes
, Article IFAC Proceedings Volumes (IFAC-PapersOnline) ; Volume 7, Issue PART 1 , 2007 , Pages 399-406 ; 14746670 (ISSN); 9783902661340 (ISBN) ; Dehbashi, M ; Miremadi, S. G ; Amiri, M ; Sharif University of Technology
IFAC Secretariat
2007
Abstract
This paper evaluates the error propagation and its effects in babbling idiot failure in a FlexRay-based network. The evaluation is based on about 35680 bit-flip fault injections inside different parts of the FlexRay communication controller. To do this, a FlexRay communication controller is modeled by Verilog HDL at the behavioral level. Then, this controller is exploited to setup a FlexRay-based network composed of four nodes. Nodes in this experiment are considered in two forms: 1) node without bus guardian, 2) node with bus guardian. The results of fault injection show that in first form about 4.57% of faults lead to the babbling idiot failures. Also in second form about 0.75% faults lead...
Mapping activity diagram to Petri Net: Application of Markov theory for analyzing non-functional parameters
, Article International Journal of Engineering, Transactions B: Applications ; Volume 20, Issue 1 , 2007 , Pages 65-76 ; 1728-144X (ISSN) ; Movaghar, A ; Fadavi Amiri, M ; Sharif University of Technology
Materials and Energy Research Center
2007
Abstract
The quality of an architectural design of a software system has a great influence on achieving non-functional requirements of a system. A regular software development project is often influenced by non-functional factors such as the customers' expectations about the performance and reliability of the software as well as the reduction of underlying risks. The evaluation of non- functional parameters of a software system at the early stages of design and its development process are often considered as major factors in dealing with these issues. Because these evaluations can help us to choose the most proper model which is the securest and the most reliable.In this paper, a method is presented...