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    “Xylotism”: A tablet-based application to teach music to children with autism

    , Article 9th International Conference on Social Robotics, ICSR 2017, 22 November 2017 through 24 November 2017 ; Volume 10652 LNAI , 2017 , Pages 728-738 ; 03029743 (ISSN); 9783319700212 (ISBN) Tavakol Elahi, M ; Habibnejad Korayem, A ; Shariati, A ; Meghdari, A ; Alemi, M ; Ahmadi, E ; Taheri, A ; Heidari, R ; Sharif University of Technology
    Springer Verlag  2017
    Abstract
    Technology is inevitable, and its role for clinical therapists and specialists cannot be ignored. The promising movement towards computer-based interventions, specifically the use of tablets as an effective and newly developed learning device for children with autism spectral disorder (ASD) highlights the role of technology in addressing the shortcomings of conventional therapy methods. In this paper, we present a new application, named as Xylotism, which is an interactive game to improve learning and teach music to children with autism spectrum disorder. The game can be played with/without parents/therapists’ involvement, which increases its usefulness and effectiveness. We have... 

    “It from Bit” and quantum mechanics

    , Article Foundations of Science ; Volume 25, Issue 2 , 2020 , Pages 375-384 Barzegar, A ; Shafiee, A ; Taqavi, M ; Sharif University of Technology
    Springer  2020
    Abstract
    John Archibald Wheeler is one of the staunchest advocates of the idea that information is more fundamental than anything else in physics. In this paper, we examine the status of this idea summarized in Wheeler’s slogan ‘it from bit’ in the context of Bohmian Mechanics and spontaneous collapse models. We will argue that any question about the status of ‘it from bit’ crucially depends on the particular interpretation of these theories one favors. © 2019, Springer Nature B.V  

    “It from Bit” and Quantum Mechanics

    , Article Foundations of Science ; 2019 ; 12331821 (ISSN) Barzegar, A ; Shafiee, A ; Taqavi, M ; Sharif University of Technology
    Springer  2019
    Abstract
    John Archibald Wheeler is one of the staunchest advocates of the idea that information is more fundamental than anything else in physics. In this paper, we examine the status of this idea summarized in Wheeler’s slogan ‘it from bit’ in the context of Bohmian Mechanics and spontaneous collapse models. We will argue that any question about the status of ‘it from bit’ crucially depends on the particular interpretation of these theories one favors. © 2019, Springer Nature B.V  

    “It from Bit” and Quantum Mechanics

    , Article Foundations of Science ; 2019 ; 12331821 (ISSN) Barzegar, A ; Shafiee, A ; Taqavi, M ; Sharif University of Technology
    Springer  2019
    Abstract
    John Archibald Wheeler is one of the staunchest advocates of the idea that information is more fundamental than anything else in physics. In this paper, we examine the status of this idea summarized in Wheeler’s slogan ‘it from bit’ in the context of Bohmian Mechanics and spontaneous collapse models. We will argue that any question about the status of ‘it from bit’ crucially depends on the particular interpretation of these theories one favors. © 2019, Springer Nature B.V  

    Data-Driven Control for a Building Heating System

    , M.Sc. Thesis Sharif University of Technology Afshar Ardakani, Fatemeh (Author) ; Rezaeizadeh, Amin (Supervisor)
    Abstract
    One of the crucial ways to reduce the energy costs of buildings is to improve the energy efficiency of HVAC systems. Heating, Ventilation, and Air Conditioning (HVAC) refer to the systems used to adjust the heating and cooling within a building. Control of these systems has great importance due to their excessive energy usage. Various control methods have shown a potential for considerable savings in building operation costs. In this research, a Model Predictive Controller (MPC) is applied to perform optimal control actions. MPC opens up numerous opportunities to improve energy efficiency in the operation of HVAC systems because of their capability to consider constraints, prediction of... 

    Energy Optimization of an Arm with Seven Degrees of Freedom Using Imperialistic Competitive Algorithm (ICA) and Designing an Artificial Neural Network

    , M.Sc. Thesis Sharif University of Technology Abedini, Amin (Author) ; Ahmadian, M.T (Supervisor) ; Asghari, M (Supervisor)
    Abstract
    In recent years, great attention has been devoted to the design of artificial arms. The most crucial problem in such a design is the trajectory of movement. In this paper, a seven degree of freedom arm is modeled and simulated. Also, the optimization method named “Imperialistic Competitive Algorithm” has been modified and better performance of the new version is presented. Energy optimization is performed based on trajectory of the arm with angular velocity, angular acceleration and joint angles using modified imperialistic competitive algorithm (ICA). Considering ICA as a fast optimization algorithm, it would be reasonable to use this algorithm for robotic purposes for online answering. The... 

    کلیدواژه های تکراریCurcumin loading potentiates the neuroprotective efficacy of Fe3O4 magnetic nanoparticles in cerebellum cells of schizophrenic rats

    , Article Biomedicine and Pharmacotherapy ; Volume 108 , 2018 , Pages 1244-1252 ; 07533322 (ISSN) Naserzadeh, P ; Ashrafi Hafez, A ; Abdorahim, M ; Abdollahifar, M. A ; Shabani, R ; Peirovi, H ; Simchi, A ; Ashtari, K ; Sharif University of Technology
    2018
    Abstract
    Background: The aim of this study was to investigate the neurotoxic effects of Fe3O4 magnetic- CurNPs on isolated schizophrenia mitochondria of rats as an in vivo model. Methods: We designed CMN loaded superparamagnetic iron oxide nanoparticles (SPIONs) (Fe3O4 magnetic- CurNPs) to achieve an enhanced therapeutic effect. The physicochemical properties of Fe3O4 magnetic- CurNPs were characterized using X-ray diffraction (XRD), and dynamic laser light scattering (DLS) and zeta potential. Further, to prove Fe3O4 magnetic- CurNPs results in superior therapeutic effects, and also, the mitochondrial membrane potential collapse, mitochondrial complex II activity, reactive oxygen species generation,... 

    Sparse Representation and its Application in Image Super-resolution

    , M.Sc. Thesis Sharif University of Technology Sahraee-Ardakani, Mojtaba (Author) ; Babaie-Zadeh, Massoud (Supervisor)
    Abstract
    Sparse signal representations and its applications has been a hot topic of research in recent years. It has been demonstrated that sparsity prior can be effectively used as a regularization term to solve many of the inverse problems. One of these problems in which sparse representations have been used is image super-resolution (SR). SR is the problem of finding a high resolution (HR) image from one or several low resolution (LR) images. In this dissertation, we have focused on the problem of finding a HR image from only one LR image which is known as example-based SR. There are two kinds of methods for example-based SR: the methods which use neighborhood embedding and the methods which use... 

    Efficient Implementation of Machine Learning Methods for Resource-Constrained Devices

    , Ph.D. Dissertation Sharif University of Technology Taheri Ardakani, Farhad (Author) ; Bayat Sarmadi, Siavash (Supervisor)
    Abstract
    Nowadays, Machine learning algorithms are used to perform different tasks. Due to the high computational complexity of machine learning methods especially deep learning methods, running these methods efficiently on resource-constrained applications such as the Internet of Things (IoT) is challenging. To address the mentioned limitation, many devices send the raw data to the edge or cloud for classification due to limited computational power. This brings security and privacy issues and increases computational latency and network traffic. Hardware accelerators can be used to overcome this challenge by improving the computational power of the end nodes. Power and energy consumption with... 

    Light Duty Vehicles' Emission Reduction Potentials in Megacities
    Using New Powertrain Technologies (Case Study: Tehran)

    , M.Sc. Thesis Sharif University of Technology Askariyeh, Mohammad Hashem (Author) ; Erhami, M. (Mohammad) (Supervisor) ; Pourzahedi, H. (Hossein) (Supervisor)
    Abstract
    Tehran is one of the most polluted megacities in the world, and based on different studies, vehicular sources are responsible for most of the criteria pollutant emissions in this city. The number of vehicles on the streets has been increased drastically leading to growing amount of emission and this trend is continuing. In order to reduce the amount of vehicular emission, it is vital to investigate the factors affecting vehicles emission in this city. This could help to find efficient solutions to improve the situation. Hence, a low-cost methodology to estimate the vehicular emissions is developed. In this... 

    , M.Sc. Thesis Sharif University of Technology (Author) ; Golshani, M (Supervisor)
    Abstract
    Most of local thinkers ,who were influenced by Western philosophers of science, and have spoken about religious knowledge, have selected experimental science as standard science and Have tried to find a way trough cultural and other non-scientific channels of science to influence the field of human knowledge by religious teaching's .This expert's are generally opposed to positivist’s models of science, but because of the nature of the Western atmosphere that they breathe, consider the experimental science as the main model of knowledge and the experience as the main method of Acquisition of knowledge. Paya is also one of this thinkers who is influenced by Karl Popper's ideas about the... 

    The Role of Driver Distraction in Traffic Accidents

    , M.Sc. Thesis Sharif University of Technology Razi Ardakani, Hesamoddin (Author) ; Kermanshah, Mohammad (Supervisor)
    Abstract
    Traffic accidents are one of the leading causes of death in the world. During the last decade driver distraction played a significant role in occurrence of road crashes. Since the issue is becoming a widespread concern in many countries, the main objective of the present study was to investigate the influence of driver distraction on the various aspects of traffic accidents. In this regard, the data source of reported crashes of the United States of America in year 2010 is used. Three main property of crashes including severity, type, and avoidance maneuver are studied. Analysis of accidents severity by generalized ordered logit model indicated that phone usage and in-vehicle distraction... 

    Influence of Microstructure on Mechanical Properties and Fracture Behavior of Hybrid PP/GF/CaCO3 Composites

    , M.Sc. Thesis Sharif University of Technology Tabatabaei Ardakani, Ramin (Author) ; Ekrami, Ali Akbar (Supervisor) ; Bagheri, Reza (Supervisor)
    Abstract
    Homo-polymer of Polypropylene is a commodity thermoplastic with good physical and mechanical properties along with fair recyclability and cost. However, its application is limited in some cases, especially in automotive industry, due to a lack of toughness. One of the approaches for PP toughening is the copolymerization of PP with some ethylene co-monomers. However, existence of elastomers in this kind of polymers causes a decrease in tensile properties. Besides, glass fibers improve tensile properties of homo-and co-PP and decrease toughness of co-polymers but result in an increase for homo-polymers. A rise in expenditure of energy due to increasing the processing temperature and... 

    Axisymmetric Contact of a Rigid Inclusion Embedded at the Interface of a Piezoelectric Bimaterial

    , M.Sc. Thesis Sharif University of Technology Moeini Ardakani, Sina (Author) ; Mohammadi Shodja, Hossain (Supervisor)
    Abstract
    The axisymmetric contact problem of a rigid inclusion embedded in the piezoelectric biomaterial frictionless interface subjected to simultaneous far-field compression and electric displacement is addressed. With the aid of a robust technique, the coupled governing integral equations of this mixed boundary-value problem are reduced to decoupled Fredholm integral equations with a constraint equation. A useful limiting case for the contact problem of transversely isotropic bimaterials is addressed. The present solution is analytically in agreement with the existing solution for an isotropic bimaterial. Selected numerical results of interest to engineering applications including the radius of... 

    Behavioral Modeling and Homogenizing of Materials Containing Rough Crack

    , M.Sc. Thesis Sharif University of Technology Shaker Ardakani, Kamal (Author) ; Mofid, Masoud (Supervisor) ; Khezrzadeh, Hamed (Co-Advisor)
    Abstract
    The present paper proposes a micromechanical damage model for two and three dimensional Representative Volume Element (RVE) with randomly distributed cohesive rough slit-like and penny-shaped micro cracks (Barenblatt-Dugdale type). First, the influence of crack roughness on the crack opening under macro hydrostatic stress state is studied and then the energy release contribution to material damage process is estimated. Considering the fractality of the crack trajectories yields to lower values of the volume crack opening. This will result in lower energy release rate in RVE and higher levels of material resistance. Based on the energy release rate of RVE, the effective material properties... 

    Overhead Line Dynamic Thermal Rating Using Fuzzy Method and its Effect on Power System Reliability

    , M.Sc. Thesis Sharif University of Technology Shaker Ardakani, Hamid (Author) ; Fotuhi Firuzabad, Mahmoud (Supervisor)
    Abstract
    In recent years, because of power system restructuring and load growth, much of transmission lines are reaching to their maximum capacity. Therefore, it is so essential to upgrade existing transmission system. However, constructing new lines is a very expensive and time consuming method. Dynamic thermal rating of overhead line is an alternative solution for upgrading transmission system capacity. In this method, allowable current capability of line in the next duration is calculated according to the environmental conditions. A method should be developed to perfectly model these environmental changes. Fuzzy method is a powerful tool that models uncertainties and measurement errors in a simple... 

    A Critical Reading of Russel on Causation

    , M.Sc. Thesis Sharif University of Technology Moulavi Ardakani, Reza (Author) ; Taghavi, Mostafa (Supervisor)
    Abstract
    Causation is one of the most old and difficult problems of Metaphysics which is also important in Science and Philosophy of Science. There are three different views in the Ontology of Causation—Eliminativism, Fundamentalism and Reductionism. Also we know that the Ontology of Causation can be equated with the question of the difference between Causal and Non-Causal series of events, such that the answers to this question are correspondent to the mentioned views: 1)Eliminativism: There is not any difference between those two series and the concept of Causation does not have any objective or external being. 2)Primitivism: There is a difference between them but it can not be explained in any... 

    Numerical Simulation, Tunability and Experimental Investigation of Random Lasers and Using ZnO Nanosheets in these Lasers and UV Photodetectors

    , Ph.D. Dissertation Sharif University of Technology Ghasempour Ardakani, Abbas (Author) ; Mahdavi, Mohammad (Supervisor) ; Bahrampour, Ali Reza (Supervisor) ; Taghavinia, Nima (Co-Advisor)
    Abstract
    In this thesis, first, random lasing in a three dimensional disordered medium has been simulated using FDTD method and some properties of random lasers which were observed by others in the previous experiments have theoretically been shown. Our simulation results show that when the density of particles increases to an upper limit, the intensity of lasing modes is enhanced. Also, the effects of pumping rate and particle size on the number of lasing modes and their intensity are studied. Lasing threshold of laser modes in different disordered systems is calculated and it is shown that by an appropriate selection of the central frequency of gain line-shape, the output power intensity of random... 

    Computational Simulation of the Effect of Breathing Particle Mass and Breathing Frequency on a Human Respiratory System

    , M.Sc. Thesis Sharif University of Technology Goodarzi Ardakani, Vahid (Author) ; Tayyebi Rahni, Mohammad (Supervisor)
    Abstract
    Our surrounding environment is full of particles with different sizes. These suspended particles enter our body through respiration process, which of course has some negative effects. Therefore, it is very important to comprehend the mechanisms and the effective parameters on these particles motion and their deposition inside the human airway. This work numerically investigates the effects of particles mass and breathing frequency on the deposition of particles in human respiratory system. To this end, a realistic 3-D model of human respiratory system geometry, including nostrils, vestibule, nasal cavity, human sinuses, nasopharynx, oropharynx, larynx, trachea, and main bronchus has been... 

    Fabrication of Al Based Nanocomposite with Al2O3 and Al3Ti Reinforcements by Mechanical Milling and Press and Sintering (In situ method) and Investigation of Its Wear Behavior

    , M.Sc. Thesis Sharif University of Technology Shabani Nezhad, Parisa (Author) ; Seyed Reihani, M (Supervisor)
    Abstract
    In this study, Aluminium based nanocomposite with Al3Ti and Al2O3 nanoparticles have been elaborated by mechanical alloying. For this purpose, Al and TiO2 powders have been blended with weight ratios of 10, 20 and 30 percents and were milled using a planetary mill. Morphological variations in different timing periods of mechanical milling process was investigated by Scaning Electron Microscopy (SEM) and The optimal times for alloying were determined for each combination. The pure Aluminium and the powder with 10, 20 and 30%wt reinforcement had coax morphology after respectively for 44, 30, 24 and 14 hours. after studing phase transformations by XRD analysis, the final powders were cold...