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    ?Euthanasia, Yes or No

    , M.Sc. Thesis Sharif University of Technology Hoseini, Safieh Sadat (Author) ; Hoseini, Hasan (Supervisor)
    Abstract
    Euthanasia is one of the most controversial topics in medical ethics and in the areas of religion, law and ethics are studied .Different approaches to the authorities in case of euthanasia on the ballot, specifically rooted in the philosophical approach, to their beliefs and culture. According to the above description. The main objective of this paper is to study the philosophical approach of euthanasia. Therefore, this text answer three main questions. The first question will be discussed in the first chapter is that "How general philosophical issues applied to specific cases such as euthanasia?" The second question is about the definition and types of euthanasia .This question will be... 

    Controlling longitudinal safe distance between vehicles

    , Article Promet - Traffic - Traffico ; Volume 21, Issue 5 , 2009 , Pages 303-310 ; 03535320 (ISSN) Sadat Hoseini, S. M ; Fathi, M ; Vaziri, M ; Sharif University of Technology
    2009
    Abstract
    Controlling the safe distances between vehicles on freeways can be used to prevent many accidents. In this research, image-processing techniques have been used to develop an online system that calculates the longitudinal distances between vehicles. This system facilitates controlling safe distances between vehicles without the need for high technology devices. Our approach is real-time and simple, but efficient operations have been used to reduce the image occlusion problem. The main concept of this system is using simple, quick, and effective algorithms for calculating the position of each vehicle in each image. In this way, traffic parameters like speed and distances between vehicles can... 

    Payment Cost Minimization-Based Short-Term Unit Commitment Considering Incentive-Based Demand

    , M.Sc. Thesis Sharif University of Technology Azizi, Ali (Author) ; Hoseini, Hamid (Supervisor)
    Abstract
    After restructuring in power systems, Independent System Operators (ISO's) are looked for an appropriate auction mechanism to find the market operation point. In deregulated electricity markets, Offer Cost Minimization (OCM) auction is used to minimize the total bid cost for selecting offer and demand bids. But a uniform market clearing price (MCP) or Locational Marginal Price (LMP) is used for consumer payments. Hence, the minimized bid cost is different from settlement cost. The used mechanisms are for manufactures offer and their cost functions optimization. The Payment Cost Minimization (PCM) is one of the mechanims that affect directly on the consumers payment and lead to reduction of... 

    Optimum design process of vibration absorber via imperialist competitive algorithm

    , Article International Journal of Structural Stability and Dynamics ; Volume 12, Issue 3 , 2012 ; 02194554 (ISSN) Hoseini, R ; Salehipoor, H ; Sharif University of Technology
    2012
    Abstract
    This paper deals with the optimum design of vibration absorbers utilized to reduce undesirable random vibrational effects that are originated in linear structures. Analytical expressions, for the case of nonstationary white-noise accelerations, are derived. The criterion is different from most conventional optimum design criteria, since it is based on minimizing the displacement or the acceleration variance of the main structure responses, without considering performances required against failure. In this study, in order to control the structural vibrations induced on a mechanical structure excited by nonstationary based acceleration random process, the MOO (multi-objective optimum) design... 

    Assessing and Fragility Analysis of Collapse of R.C Buildings

    , Ph.D. Dissertation Sharif University of Technology Hoseini, Abbas (Author) ; Ghaemian, Mohsen (Supervisor)
    Abstract
    Global collapse in earthquake engineering refers to the inability of a structural system to sustain gravity loads when subjected to seismic excitation. Dynamic instability phenomena in exist buildings have a key position and for this reason strict criteria in structural seismic assessing codes presented for avoiding this phenomena. At this study, dynamic instability of five designed concrete buildings with moment frame system, mixed up 3, 6, 9, 12 and 15 story building, are investigated. P-delta effects, deterioration in strength and stiffness and cyclic deterioration in structural components considered in this investigation. For modeling nonlinear behavior of elements, experimental results... 

    Cluster-based adaptive SVM: a latent subdomains discovery method for domain adaptation problems

    , Article Computer Vision and Image Understanding ; Volume 162 , 2017 , Pages 116-134 ; 10773142 (ISSN) Sadat Mozafari, A ; Jamzad, M ; Sharif University of Technology
    2017
    Abstract
    Machine learning algorithms often suffer from good generalization in testing domains especially when the training (source) and test (target) domains do not have similar distributions. To address this problem, several domain adaptation techniques have been proposed to improve the performance of the learning algorithms when they face accuracy degradation caused by the domain shift problem. In this paper, we focus on the non-homogeneous distributed target domains and propose a new latent subdomain discovery model to divide the target domain into subdomains while adapting them. It is expected that applying adaptation on subdomains increase the rate of detection in comparing with the situation... 

    Efficient contrast enhancement of images using hybrid ant colony optimisation, genetic algorithm, and simulated annealing

    , Article Digital Signal Processing: A Review Journal ; Volume 23, Issue 3 , 2013 , Pages 879-893 ; 10512004 (ISSN) Hoseini, P ; Shayesteh, M. G ; Sharif University of Technology
    2013
    Abstract
    In this paper, we propose a hybrid algorithm including Genetic Algorithm (GA), Ant Colony Optimisation (ACO), and Simulated Annealing (SA) metaheuristics for increasing the contrast of images. In this way, contrast enhancement is obtained by global transformation of the input intensities. Ant colony optimisation is used to generate the transfer functions which map the input intensities to the output intensities. Simulated annealing as a local search method is utilised to modify the transfer functions generated by ant colony optimisation. And genetic algorithm has the responsibility of evolutionary process of antsE characteristics. The employed fitness function operates automatically and... 

    Hybrid ant colony optimization, genetic algorithm, and simulated annealing for image contrast enhancement

    , Article 2010 IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 IEEE Congress on Evolutionary Computation, CEC 2010, 18 July 2010 through 23 July 2010, Barcelona ; 2010 ; 9781424469109 (ISBN) Hoseini, P ; Shayesteh, M. G ; Sharif University of Technology
    2010
    Abstract
    In this paper, we propose a hybrid algorithm including Genetic Algorithm (GA), Ant Colony Optimization (ACO), and Simulated Annealing (SA) metaheuristics for increasing the contrast of images. In this way, the contrast enhancement is obtained by globally transformation of the input intensities. ACO is used to generate the transfer functions which map the input intensities to the output intensities. SA as a local search method is utilized to modify the transfer functions generated by ACO. GA has the responsibility of evolutionary process of ants' characteristics. The results indicate that the new method performs better than the previously presented methods from the subjective and objective... 

    Reducing wind tunnel data for flowfield study over the wing-canard configuration using neural network

    , Article 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 5 January 2004 through 8 January 2004 ; 2004 , Pages 8371-8377 Hoseini, A. A ; Masdari, M ; Sharif University of Technology
    2004
    Abstract
    The objective of this paper is study of flowfield over the wing of a coplanar and close-coupled wing-canard configuration model using neural network, in order to reduce measurement points and experiment time. The results are based on flowfield pressure and wing surface pressure measurements at difference angles of attack, no sideslip and difference angles of canard. A GRNN (General Regression Neural Network) algorithm is developed to determine the shape and trajectory of vortices over this model. This network uses the total pressure coefficients of flowfield over the wing of this model that are obtained by total pressure probe as its input. The data presented to the network are processed to... 

    The Effect of Travel Time Reliability on Morning Peak Travellers route choice in Large Metropolitan Area

    , M.Sc. Thesis Sharif University of Technology Sadat Mirjafari, Parisa (Author) ; Poorzahedy, Hossein (Supervisor)
    Abstract
    Data collected from street networks show that travel time in urban street networks is a stochastic variable, whose range of variation increases with the congestion level. Work and school trips comprise the major part of morning peak volumes, whose common characteristic is that they need to be made on time. For this reason, these travelers are pessimistic in their route choice, and try to choose routes which are more reliable. Travel time standard deviation is one of the common measures for estimating travel time reliability that is related to properties of day-to-day travel time distribution on a particular route. Based on the empirical data collected from Tehran street network, this paper... 

    Indoor Noise Pollution Modeling: A Case Study on Resalat Tunnel

    , M.Sc. Thesis Sharif University of Technology Sadat Mortazavi, Mandana (Author) ; Vaziri, Manouchehr (Supervisor)
    Abstract
    Noise or noise pollution, is defined as an unwanted sound, produced mostly by motor vehicles in urban areas. If the noise exceeds its limit, adverse effects on users and citizens are expected. Thus the assessment of the noise level and its comparison with allowable values is mandatory. Traffic induced noise depends upon different factors such as traffic, weather, and, sound barriers. Noise pollution study has a long history all over the world. Many studies, mostly representing the outdoor noise pollution models, have been done in recent years. This paper presents an assessment of traffic-induced noise in a heavily traveled tunnel, locally referred to as Resalat tunnel, which is located in... 

    Using Information Beyond Text to Generate Language Embedding Vectors

    , M.Sc. Thesis Sharif University of Technology Zeinab Sadat Taghavi (Author) ; Sameti, Hossein (Supervisor)
    Abstract
    In this thesis, we introduce a novel Artificial Intelligence (AI) system inspired by the philosophical and psychoanalytical concept of imagination as a ``Re-construction of Experiences". Our AI system is equipped with an imagination-inspired module that bridges the gap between textual inputs and other modalities, enriching the derived information based on previously learned experiences. A unique feature of our system is its ability to formulate independent perceptions of inputs. This leads to unique interpretations of a concept that may differ from human interpretations but are equally valid, a phenomenon we term as ``Interpretable Misunderstanding". We employ large-scale models,... 

    Hierarchical Fat-tree Topology for an Optical Network-on-Chip

    , M.Sc. Thesis Sharif University of Technology Hoseini, Fateme Sadat (Author) ; Hessabi, Shahin (Supervisor)
    Abstract
    With increasing number of processors on a chip, the role of interconnections becomes more important in both power consumption and bandwidth. As a result, in MultiProcessor System-on-Chip architectures, the design constraints will shift from "Computational Constraints" to "Communicational Constraints". Nowadays, optical information transfer is introduced as a suitable substitution for electrical interconnections in chips, which can eliminate their problems. Many different optical networks have been presented so far. These networks can be divided into two subcategories. Networks of the first category use an electrical infrastructure as well as optical one. Hence, the scalability of scheme is... 

    Deconstruction of Media Hegemony Based on Ideas of Jacques Derrida

    , M.Sc. Thesis Sharif University of Technology Honarvar, Mohammad Amin (Author) ; Hoseini, Hassan (Supervisor)
    Abstract
    In the first description if we describe technology as a tool, Communication technologies or media should be consider as the most important element of today's technological world. This research is going to cover reconsidering and recreating the mean of media based on the Ideas of JacquesDerrida. In this regard, two major dichotomy is evident in the public understanding of media. meanwhile "media versus message" and on the other hand opposition between "media and audience". So deconstruction in the face of these binary oppositions, want to read out the notion that message is superior to media, and on the other hand to deconstruction of the hegemony of the media on the audience  

    Modelling drivers' behaviour as a crash risk reduction process

    , Article Promet - Traffic - Traffico ; Volume 20, Issue 3 , Volume 20, Issue 3 , 2008 , Pages 139-146 ; 03535320 (ISSN) Hoseini, S. M. S ; Vaziri, M ; Sharif University of Technology
    Faculty of Transport and Traffic Engineering  2008
    Abstract
    The evermore widespread use of microscopic traffic simulation in the analysis of road systems has refocused attention on sub models, including car-following and lane-changing models. In this research a microscopic model is developed which combines car-following and lane-changing models and describes driver behaviour as a crash risk reduction process of drivers. This model has been simulated by a cellular automata simulator and compared with the real data. It has been shown that there is no reason to consider the model invalid for drivers' behaviour in the basic segments of freeways in Iran, during not-congested conditions. Considering that uncertainty of position of vehicles is caused by... 

    Deformation and Annealing Behavior of an Austenitic Stainless Steel

    , M.Sc. Thesis Sharif University of Technology Sadat Alavi, Parisa (Author) ; Serajzadeh, Siamak (Supervisor)
    Abstract
    In this research, non-isothermal annealing process at temperatures ranging between 400°C to 830 °C was investigated in warm and cold-rolled austenitic stainless steel 304L. First, the wide variety of austenitic to martensitic structure was produced by the multi-pass rolling process at room temperature -8 °C, 200 °C, and 280°C. The n exponent in Olson-Cohen equation was governed 2.83 after non-linear curve fitting to assess the fraction of deformation-induced martensite as a function of strain. Afterward, Abaqus/Explicit method was utilized to achieve the stored energy and plastic strains distribution through the thickness. Then, Cellular automata and Galerkin-finite element models were... 

    Microemulsion Synthesize of Fe3O4/TiO2 Core-Shell Nanoparticles

    , M.Sc. Thesis Sharif University of Technology Sonbolestan, Hosein (Author) ; Madaah Hoseini, Hamid Reza (Supervisor)
    Abstract
    In this study magnetite nanoparticles were synthesized by microemulsion and were coated with TiO2 by a precipitation technique. The synthesize process were done under fixed molar ratio of various constituents of microemulsion and molar ratio of water to oil. Results of X-ray diffraction spectroscopy (XRD) showed that the uncoated nanoparticles were consisted of magnetite as the major phase and no other detectable phases such as pure iron or hematite were found. Field emission scanning electron microscopy (FE-SEM) results showed that the synthesized nanoparticles small size and narrow particle size distribution. For TiO2 coating process the effect of TBOT concentration, water concentration,... 

    A small signal circuit model of two mode InAs/GaAs quantum dot laser

    , Article IEICE Electronics Express ; Volume 8, Issue 4 , 2011 , Pages 245-251 ; 13492543 (ISSN) Horri, A ; Faez, R ; Hoseini, H. R ; Sharif University of Technology
    2011
    Abstract
    In this paper, for the first time, we present a small signal circuit model of quantum dot laser considering two photon modes, i.e., ground and first excited states lasing. By using the presented model, effect of temperature variations on modulation response of quantum dot laser is investigated. Simulation results of modulation response are in agreement with the numerical and experimental results reported by other researchers  

    Investigation of breakdown voltage in InAIAs/InGaAs/InP HEMTs with different structures

    , Article IEICE Electronics Express ; Volume 7, Issue 19 , 2010 , Pages 1447-1452 ; 13492543 (ISSN) Ohadi, S ; Faez, R ; Hoseini, H. R ; Sharif University of Technology
    2010
    Abstract
    InAlAs/InGaAs/InP high electron mobility transistors have higher mobility comparing to structures without indium. But existence of indium causes smaller Eg and as a result smaller breakdown voltage. However, increasing percentage of indium results in higher mobility and as a result higher current and transconductance. Therefore decreasing percentage of indium causes higher breakdown voltage at the sometime lower transconductance. One of the most important parameters that limit maximum output power of transistor is breakdown voltage. In this paper, InAIAs/InGaAs/InP HEMTs with different structures are simulated and a structure with a good transconductance and breakdown voltage is introduced  

    A Progressive Multiscale Model to Predict the Fatigue life of Laminated Composite Reinforced with Nanoparticles

    , Ph.D. Dissertation Sharif University of Technology Toozandehjani, Hossein (Author) ; Hoseini Kordkhili, Ali (Supervisor)
    Abstract
    The increasing growth of composite materials in various industries and the use of these materials in the production of the main structures, recognized study and simulation of accurate behavior of these materials at different scales. On the other hand, the appearance of Nano-scale materials with amazing physical and mechanical properties and the use of these nanoparticles as reinforcement in the structure of polymer composites, further highlights the importance of simulating the behavior of polymer nanoparticles at different scales. One of the issues that is considered in various industries, especially in the airspace industry, is the phenomenon of fatigue. The complexity of the fatigue...