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bahrami--yeganeh
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A Semi-Automated Software Test Case Generation for Test-driven Development
, M.Sc. Thesis Sharif University of Technology ; Mirian Hosseinabadi, Hassan (Supervisor)
Abstract
Test driven software development is one of the most important practices in agile software production. In this practice, the programmer must write appropriate test cases before implementing the desired program. That is, at first, he should know what the function of his desired program is, and then considering them, the test cases are implemented. The problem with this method is that the programmer may not have much experience in this work, and good test cases may not be produced, and at the same time, this work is very time-consuming. As a result, this method may be abandoned.In this thesis, an attempt is made to provide a systematic method to make the production of test cases for the program...
Perylene diimide-POSS network for semi selective solid-phase microextraction of lung cancer biomarkers in exhaled breath
, Article Analytica Chimica Acta ; Volume 1198 , 2022 ; 00032670 (ISSN) ; Bagheri, H ; Yeganeh Rad, L ; Minaeian, S ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Lung cancer (LC) is the leading cause of cancer mortality so, the analysis of exhaled human breath has great significance for early non-invasive diagnosis. Poor selectivity and strong humidity are two bottlenecks for the application of gas sensors to exhaled breath analysis. The development of novel extractive phases for the analysis of exhaled breath by chromatography is therefore a lucrative object. Polyhedral oligomeric silsesquioxanes (POSS) are among the 3D porous materials whose unique properties make them promising coatings for solid-phase microextraction (SPME). Selective enrichment of polar or nonpolar targets depends on the pore size and functional groups on the POSSs. Herein, we...
Dependency of barrier height and ideality factor on identically produced small Au/p-Si Schottky barrier diodes
, Article Physica B: Condensed Matter ; Volume 405, Issue 16 , 2010 , Pages 3253-3258 ; 09214526 (ISSN) ; Rahmatollahpur, S ; Sadighi-Bonabi, R ; Mamedov, R ; Sharif University of Technology
2010
Abstract
Small high-quality Au/p-Si Schottky barrier diodes (SBDs) with extremely low reverse leakage current using wet lithography were produced. Their effective barrier heights (BHs) and ideality factors from currentvoltage (IV) characteristics were measured by a conducting probe atomic force microscope (C-AFM). In spite of identical preparation of the diodes there was a diode-to-diode variation in ideality factor and barrier height parameters. By extrapolating the plots the built-in potential of the Au/p-Si contact was obtained as Vbi=0.5425 V and the barrier height value (ΦB(C-V)) was calculated to be ΦB(C-V)=0.7145 V for Au/p-Si for a typical 100 μm diode diameters. In the present work the...
A patient specific finite element simulation of intramedullary nailing to predict the displacement of the distal locking hole
, Article Medical Engineering and Physics ; Volume 55 , May , 2018 , Pages 34-42 ; 13504533 (ISSN) ; Farahmand, F ; Behzadipour, S ; Yeganeh, A ; Aghighi, M ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
Distal locking is a challenging subtask of intramedullary nailing fracture fixation due to the nail deformation that makes the proximally mounted targeting systems ineffective. A patient specific finite element model was developed, based on the QCT data of a cadaveric femur, to predict the position of the distal hole of the nail postoperatively. The mechanical interactions of femur and nail (of two sizes) during nail insertion was simulated using ABAQUS in two steps of dynamic pushing and static equilibrium, for the intact and distally fractured bone. Experiments were also performed on the same specimen to validate the simulation results. A good agreement was found between the model...
Development of simple and efficient Lab-on-a-Disc platforms for automated chemical cell lysis
, Article Scientific Reports ; Volume 10, Issue 1 , 6 July , 2020 ; Saadatmand, M ; Eghbal, M ; Parsa Yeganeh, L ; Sharif University of Technology
Nature Research
2020
Abstract
Cell lysis is the most important first step for molecular biology and diagnostic testing. Recently, microfluidic systems have attracted considerable attention due to advantages associated with automation, integration and miniaturization, especially in resource-limited settings. In this work, novel centrifugal microfluidic platforms with new configurations for chemical cell lysis are presented. The developed systems employ passive form of pneumatic and inertial forces for effective mixing of lysis reagents and cell samples as well as precise fluidic control. Characterizations of the developed Lab-on-a-Discs (LoaDs) have been conducted with dyed deionized (DI) waters and white blood cells...
Numerical Analysis and Optimization of Waterjet System
, M.Sc. Thesis Sharif University of Technology ; Abbaspour, Madjid (Supervisor) ; Behzad, Mehdi (Supervisor)
Abstract
The inlet duct is one of the most important components of the waterjet propulsion system, whose hydrodynamic performance is directly related to the capabilities and efficiency of the waterjet propulsion system. In this study, a procedure was proposed to improve the hydrodynamic performance of an inlet duct. According to this proposed procedure, first the basic intake duct geometry of the waterjet propulsion system was prepared using visual programming to simplify the repetition of the design in Rhino design software, and then the numerical analysis of the designed geometry in Star CCM+ commercial software was performed. The simulation results were validated with the results of an...
Approximation algorithms for software component selection problem
, Article 14th Asia Pacific Software Engineering Conference, ASPCE 2007, Nagoya, 4 December 2007 through 7 December 2007 ; January , 2007 , Pages 159-166 ; 15301362 (ISSN); 0769530575 (ISBN); 9780769530574 (ISBN) ; Habibi, J ; Moaven, S ; Kargar, M ; Yeganeh, H ; Sharif University of Technology
2007
Abstract
Today's software systems are more frequently composed from preexisting commercial or non-commercial components and connectors. These components provide complex and independent functionality and are engaged in complex interactions. Component-Based Software Engineering (CBSE) is concerned with composing, selecting and designing such components. As the popularity of this approach and hence number of commercially available software components grows, selecting a set of components to satisfy a set of requirements while minimizing cost is becoming more difficult. This problem necessitates the design of efficient algorithms to automate component selection for software developing organizations. We...
A novel clustering algorithm based on circlusters to find arbitrary shaped clusters
, Article 2008 International Conference on Computer and Electrical Engineering, ICCEE 2008, Phuket, 20 December 2008 through 22 December 2008 ; January , 2008 , Pages 619-624 ; 9780769535043 (ISBN) ; Habibi, J ; Abolhassani, H ; Shirali Shahreza, S ; Sharif University of Technology
2008
Abstract
Clustering is the problem of partitioning a (large) set of data using unsupervised techniques. Today, there exist many clustering techniques. The most important characteristic of a clustering technique is the shape of the cluster it can find. In this paper, we propose a method that is capable to find arbitrary shaped clusters and uses simple geometric constructs, Circlusters. Circlusters are different radius sectored circles. Circlusters can be used to create many hybrid approaches in mixture with density based or partitioning based methods. We also proposed two new clustering methods that are capable to find complex clusters in O(n), where n is the size of the data set. Both of the methods...
Circluster: storing cluster shapes for clustering
, Article 2008 4th International IEEE Conference Intelligent Systems, IS 2008, Varna, 6 September 2008 through 8 September 2008 ; Volume 3 , 2008 , Pages 1114-1119 ; 9781424417391 (ISBN) ; Hassas Yeganeh, S ; Abolhassani, H ; Habibi, J ; Sharif University of Technology
2008
Abstract
One of the important problems in knowledge discovery from data is clustering. Clustering is the problem of partitioning a set of data using unsupervised techniques. An important characteristic of a clustering technique is the shape of the cluster it can find. Clustering methods which are capable to find simple cluster shapes are usually fast but inaccurate for complex data sets. Ones capable to find complex cluster shapes are usually not fast but accurate. In this paper, we propose a simple clustering technique named circlusters. Circlusters are circles partitioned into different radius sectors. Circlusters can be used to create hybrid approaches with density based or partitioning based...
Security and Configuration Improvement in TETRA Systems
, M.Sc. Thesis Sharif University of Technology ; Haj Sadeghi, Khosrow (Supervisor)
Abstract
TETRA (TErrestrial Trunked RAdio) is one of the mobile telecommunication standards which has improved in several aspects (voice, data, video, coverage, etc.), especially the security section during the last two decades. Although communication could be quite secure in TETRA when the encryption is used, however, attackers create new ways to bypass the encryption without the knowledge of the legitimate user. Security is performed in different levels and forms to create reliable operation and to protect information through the transmission path from interception and tampering. Since most of the TETRA users require the highest possible level of security, in this thesis we introduce a new...
Analysis of Secret Key Agreement in The Channel Model with Side Information
, M.Sc. Thesis Sharif University of Technology ; Aref, Mohammad Reza (Supervisor)
Abstract
In this thesis, the problem of secret key agreement in the channel model with side information is studiedx. In order to investigate the problem, we consider three models according to the different ways of side information availability which are the state-dependent broadcast channel; the state-dependent broadcast channel in presence of public channel and the state-dependent wiretap channel with degraded versions of the channel state information.For the problem of secret key agreement in broadcast channels, two models, the state-dependent wiretap channel and state-dependent three receivers broadcast channel, are considered. We obtain inner and outer bounds of the secret key capacity region for...
Optimal Deployment of Electric Vehicle Charging Stations
, M.Sc. Thesis Sharif University of Technology ; Zakaei Ashtiani, Hedayat (Supervisor)
Abstract
Limited oil resources, increasing rate of oil consumption, and environmental concerns related to burning fossil fuels promote the use of alternative fuel vehicles. Electric vehicles are common among alternative fuel vehicles which decrease greenhouse gases emission and fossil fuel dependence. To increase electric vehicle market share, some challenges need to be overcome including range anxiety. Limited driving range is one of the main challenges for battery-powered electric vehicles. The distance limit inevitably changes electric vehicle drivers’ travel behavior. Given the scarcity of charging stations, consumers perceive this driving range limit to be a potential worry. Therefore,...
Design of a Pyroshock Simulator with Ability of Generating Specified SRS
, M.Sc. Thesis Sharif University of Technology ; Saadat Foumani, Mahmoud (Supervisor)
Abstract
Pyroshock Test is one of important environment tests in satellite design process.pyroshock or pyrotechnic shock is one of loads that exerted on spacecraft and it's subsystems during launch process. pyroshock can cause failure in some subsystems like sensitive electronic parts, solar cells and so on. For this reason it's necessary to make sure about strength of component under pyroshock which can be done by pyroshock simulator.The purpose of this research is to design a pyroshock simulator that can simulate a pyroshock with given SRS (Shock Response Spectrum) for satellite components.Requirements and constraints for design have been defined such as test item dimensions,weight range and also...
A modified approach for residential load scheduling using smart meters
, Article IEEE PES Innovative Smart Grid Technologies Conference Europe ; 2012 ; 9781467325974 (ISBN) ; Parniani, M ; Vafaeimehr, A ; Sharif University of Technology
2012
Abstract
Implementation of various incentive-based demand response strategies has great potential to decrease peak load growth and customer electricity bill cost. Using advanced metering and automatic demand management makes it possible to optimize energy consumption, to reduce grid loss, and to release generation capacities for the sake of providing sustainable electricity supply. Executing an incentive-based program is a simple way for customers to monitor and manage their energy consumption, and therefore, to reduce their electricity bill. With these objectives, this paper examines the previously suggested load scheduling programs and proposes a new practical one for residential energy management....
Attitude control of satellites with delay in attitude measurement
, Article 2013 IEEE International Conference on Robotics and Automation, ICRA 2013 ; 2013 , Pages 947-952 ; 10504729 (ISSN); 9781467356411 (ISBN) ; Namvar, M ; Aghili, F ; Sharif University of Technology
2013
Abstract
Time delay in attitude sensors is one of the performance limiting factors in controlling the satellite attitude. In this paper, we investigate attitude control of a fully actuated satellite in presence of constant and known delay in attitude measurement. The proposed controller consists of a matrix gain which is computed by solving a time varying matrix differential equation depending on the time delay. We assume that the moment-of-inertia matrix of the satellite is unknown. The controller guarantees asymptotic convergence of the satellite attitude and angular velocity to their desired values in presence of delay. Finally, a simulation example is presented that illustrates performance of the...
Modeling of the Performance of Some Redox Flow Batteries (RFB)
, M.Sc. Thesis Sharif University of Technology ; Gobal, Fereydoon (Supervisor)
Abstract
We tried to collect electrode kinetics, transport separator and structural data about the existing RFB, mainly all V-based and try to simulate the behavior of these batteries under various load and different fluid injection conditions. The behavior of the potential-current, power-current and potential-time at different levels of concentration, flow, pH, .... were studied . The results between the two modes with the membrane and without the membrane in the batch battery were compared. Batch battery with membrane shows improved performance. Increasing the concentration of vanadium and reduceing the current at the flow battery decreases the gap between the charge and discharge state
DACA: Data-aware clustering and aggregation in query-driven wireless sensor networks
, Article 2012 21st International Conference on Computer Communications and Networks, ICCCN 2012 - Proceedings ; 2012 ; 9781467315449 (ISBN) ; Yousefi, H ; Movaghar, A ; Sharif University of Technology
2012
Abstract
Data aggregation is an effective technique which is introduced to conserve energy by reducing packet transmissions in wireless sensor networks (WSNs). In addition, it is possible to consume less energy by using the spatial correlation and redundancy of data in dense networks to form clusters of nodes sensing similar values and, in turn, transmit one data packet per cluster. In this paper, we propose a Data-Aware Clustering and Aggregation scheme (DACA) to manage the energy constraint in a query-driven WSN. The DACA selects cluster head nodes by forming a new factor as a function of three parameters including the residual energy, the data value, and the number of neighbors at each node....
Decoherence effects on superpositions of chiral states in a chiral molecule
, Article Physical Chemistry Chemical Physics ; Volume 14, Issue 25 , Apr , 2012 , Pages 9214-9218 ; 14639076 (ISSN) ; Shafiee, A ; Bassi, A ; Sharif University of Technology
2012
Abstract
The superposition of chiral states of chiral molecules, as delocalized quantum states of a many-particle system, can be used for the experimental investigations of decoherence theory. In this regard, a great challenge is the precise quantification of the robustness of these superpositions against environmental effects. The methods so far proposed need the detailed specification of the internal states of the molecule, usually requiring heavy numerical calculations. Here, by using the linearized quantum Boltzmann equation and by borrowing ideas employed for analyzing other quantum systems, we present a general and simple approach, of wide applicability, which can be used to compute the...
Vesicle deformations by clusters of transmembrane proteins
, Article Journal of Chemical Physics ; Volume 134, Issue 8 , 2011 ; 00219606 (ISSN) ; Jalali, M. A ; Sharif University of Technology
2011
Abstract
We carry out a coarse-grained molecular dynamics simulation of phospholipid vesicles with transmembrane proteins. We measure the mean and Gaussian curvatures of our protein-embedded vesicles and quantitatively show how protein clusters change the shapes of their host vesicles. The effects of depletion force and vesiculation on protein clustering are also investigated. By increasing the protein concentration, clusters are fragmented to smaller bundles, which are then redistributed to form more symmetric structures corresponding to lower bending energies. Big clusters and highly aspherical vesicles cannot be formed when the fraction of protein to lipid molecules is large
Nanoscopic spontaneous motion of liquid trains: Nonequilibrium molecular dynamics simulation
, Article Journal of Chemical Physics ; Volume 132, Issue 2 , 2010 ; 00219606 (ISSN) ; Jalali, M. A ; Sharif University of Technology
2010
Abstract
Macroscale experiments show that a train of two immiscible liquid drops, a bislug, can spontaneously move in a capillary tube because of surface tension asymmetries. We use molecular dynamics simulation of Lennard-Jones fluids to demonstrate this phenomenon for NVT ensembles in submicron tubes. We deliberately tune the strength of intermolecular forces and control the velocity of bislug in different wetting and viscosity conditions. We compute the velocity profile of particles across the tube and explain the origin of deviations from the classical parabolae. We show that the self-generated molecular flow resembles the Poiseuille law when the ratio of the tube radius to its length is less...