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Critique of Kuhns Histirical Perspective from Gadamerian Perspective
, M.Sc. Thesis Sharif University of Technology ; Moeinzadeh, Mahdi (Supervisor) ; Taghavi, Mostafa (Supervisor)
Abstract
Truth and Method is one of the two or three most important works of this century on the philosophy of humanistic studies. The book is powerful, exciting, but undeniably difficult. Published when Gadamer was sixty, it gathers the ripe fruit of a lifetime's reading, teaching, and thinking. Because it is immersed in German philosophy and scholarship, the book is even more challenging for an American reader. An emerging body of commentary in English as well as the many shorter essays Gadamer has, happily, lived to write and which are increasingly available in translation provide additional means of access to his thought. Truth and Method, however, remains his magnum opus, the comprehensive and...
Applying of Hax Model in Development of Sectoral Technology Strategy
Iran Fuel Cell Technology Strategy Case Study
,
M.Sc. Thesis
Sharif University of Technology
;
Arasti, Mohammad Reza
(Supervisor)
Abstract
This thesis is a part of national studies of “attractiveness analysis and strategy formulation of fuel cell technology in Iran" that was done during more than two years with the guidance of fuel cell steering committee. In this thesis, first of all the possibility of applying the technology strategy model of Arnold Hax in national level was investigated. For this purpose, with regard to the fuel cell technology specifications and status in the country, from the perspectives of national need to the technology, capabilities of technology in the country and new applications of technology, the technology strategy models of positioning school were studied and from the models of this approach,...
Chemical Reaction Systems with Toric Steady States
, M.Sc. Thesis Sharif University of Technology ; Pournaki, Mohammad Reza (Supervisor)
Abstract
Mass-action chemical reaction systems are frequently used in computational biology. The corresponding polynomial dynamical systems are often large (consisting of tens or even hundreds of ordinary differential equations) and poorly parameterized (due to noisy measurement data and a small number of data points and repetitions). Therefore, it is often difficult to establish the existence of (positive) steady states or to determine whether more complicated phenomena such as multi-stationarity exist. If, however, the steady state ideal of the system is a binomial ideal, then we show that these questions can be answered easily. The focus of this work is on systems with this property, and we say...
Numerical Investigation of Laminar Premixed Flame Response to Acoustic Excitation
, M.Sc. Thesis Sharif University of Technology ; Farshchi, Mohammad (Supervisor)
Abstract
Flame Response to acoustic excitation which plays an important role in combustion chamber stability state may be found through numerical simulation. A finite volume code of higher order accuracy developed for compressible flows was adopted. Species equations along with a single-step irreversible reaction model were added to this non-reacting program. Changes were also made to the energy equation. Premixed methane/air flame in tubes was studied and the same problem was solved with FLUENT software. It was found that whether the Lewis number is considered constant or temperature dependent has a strong effect on flame structure and shape and that using mean values for gas properties yields out...
The synthesis of multiphasic ionic liquid-coated Pt/Al2O3 catalysts: the selective synchronous hydrogenation of C=C and C=O bonds and the modeling of the ionic liquid and solvent effects
, Article Catalysis Science & Technology ; Issue 2, 2014 , Oct , 2013 , pages 447-455 ; Tasviri, M. (Mahboubeh) ; Khodadadi-moghaddam, M. (Mohammad) ; Gholami, M. R. (Mohammad Reza) ; Sharif University of Technology
2013
Abstract
Various ionic liquids (ILs) and their mixtures were coated on the Pt/Al2O3 catalyst and the resulting IL-coated catalysts were used in the synchronous hydrogenation of cyclohexene and acetone. The rate constant (k) and selectivity (S) toward CO hydrogenation were determined for several catalysts in various solvents. The solvatochromic parameters (ETN, normalized polarity parameter; π*, dipolarity-polarizability; β, hydrogen-bond acceptor basicity; α, hydrogen-bond donor acidity) were determined for the used ILs and solvents and the obtained selectivities were modeled based on the solvatochromic parameters of the IL layer and bulk solvent while using the Multiparameter Linear Regression (MLR)...
Optimization in Vehicle Routing Problem (VRP)in Servicing Customers, by Considering the Customer's Physical Location is not Fixed
, M.Sc. Thesis Sharif University of Technology ; Akbari Jokar, Mohammad Reza (Supervisor)
Abstract
Due to the expansion and development of traffic routes, expecting customers to stay at a place for a long time would rise dissatisfaction and so on in this present study we are going to consider classical vehicle routing problem with simultaneous pick-up and delivery. Vehicles are allowed to have multiple trips and to improve customer’s flexibility and improving service level, different potential locations for each customer are considered. This type of problems in the literature are called vehicle routing problem with roaming deliveries and we expand it with some strong assumption to make the problem more real.In the proposed model there is an objective function that minimizes both variable...
Synthesis of tetrahydrothiopyrano[2,3-b]indole [60]fullerene derivatives via hetero-diels–alder reaction of c60 and α,β-unsaturated indole-2-thiones
, Article Journal of Heterocyclic Chemistry ; Volume 54, Issue 2 , 2017 , Pages 911-915 ; 0022152X (ISSN) ; Ghanbari, B ; Behzadi, M ; Baghersad, M. H ; Sharif University of Technology
HeteroCorporation
2017
Abstract
Hetero-Diels–Alder reactions of [60]fullerene with α,β-unsaturated thio-oxindoles (3a, 3b, 3c), prepared from thio-oxindole 1 and heteroaromatic aldehydes (2a, 2b, 2c), to generate tetrahydrothiopyrano[2,3-b]indole [60]fullerene cycloadducts (5a, 5b, 5c) under thermal or microwave irradiation were described. The yields were improved, and the reaction time was decreased by conducting the reaction under microwave irradiation. © 2016 Wiley Periodicals, Inc
Experimental Investigation of Using Phase Change Material Effect on Heat Transfer in Pool Boiling Process
, M.Sc. Thesis Sharif University of Technology ; Shafii, Mohammad Behshad (Supervisor)
Abstract
One of the different methods of heat transfer, is pool boiling process. In this method, the operating fluid starts to boil on a hot surface whose temperature is more than boiling point of the fluid. Based on difference between between surface temperature and fluid boiling point, amount of heat flux from hot surface to fluid and fluid behavior will be different. In recent years, many researchers have tried to improve the amount of heat transfer in the boiling process by using various methods such as nanoparticle addition or using magnetic field.Latent heat is thermal energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process, usually a first-order...
Preferential solvation and behavior of solvatochromic indicators in mixtures of an ionic liquid with some molecular solvents
, Article The Journal of Physical Chemistry B ; vol.114 (29) , July , 2010 , pp 9586–9593 ; Khodadadi-Moghaddam, M.(Mohammad) ; Harifi-Mood, A. R. (Ali Reza) ; Gholami, M. R. (Mohammad Reza) ; Sharif University of Technology
2010
Abstract
Structural and intermolecular interactions of solvatochromic probes 4-nitroaniline, 4-nitroanisole, and Reichardt’s dye were investigated in the binary mixtures of 2-hydroxy ethylammonium formate as an ionic liquid with N,N-dimethyl formamide, dimethyl amine, and dimethyl sulfoxide. Solvatochromic parameters (ETN, normalized polarity parameter; π*, dipolarity/polarizability; β, hydrogen-bond acceptor basicity; α, hydrogen -bond donor acidity) were determined in ionic liquid mixtures at 25 °C using UV−vis spectroscopy. ETN parameters obtained from absorbance of Reichardt’s dye within various mixtures of ionic liquid were observed to be higher than predicted values from ideal additive...
Numerical Investigation of a Wind Turbine Blade Dynamic Stall in a Dusty Flow
, M.Sc. Thesis Sharif University of Technology ; Taeibi Rahni, Mohammad (Supervisor) ; Salimi, Mohammad Reza (Supervisor)
Abstract
Interaction of vortices with particles is one of the complex and fascinating phenomena in fluid dynamics, which is often observed in wind turbines operating in dusty environments. In these turbines, dynamic stall occurs where vortices continuously form and dissipate. In this study, the impact of the presence of dust particles on dynamic stall, which can noticeably affect the aerodynamic efficiency of wind turbines, has been examined and analyzed; We focus on three airfoil models of the horizontal-axis wind turbines. namely S809, S822, and SD7062 at a Reynolds number of 10^6. These were examined using numerical simulation, with k-ω SST turbulence model and discrete phase model (DPM). The...
The Influence Of E-shopping on Shopping Trips Case Study of Students of Tehran
, M.Sc. Thesis Sharif University of Technology ; Kermanshah, Mohammad (Supervisor)
Abstract
Online searching for product information or buying some certain goods online has become increasingly popular during the last few years. Despite this fact there is still little empirical evidence about the relationship between in-store shopping and e-shopping. The substitution effect between these two types of shopping can have significant outcomes in urban transportation. Hence Analyzing different aspects of this new phenomenon and using its potential substitution effect on in-store shopping to decrease the amount of mobility in transportation system can be an attractive subject for urban transportation planners. The main purpose of this study is to reveal the relationship between the...
Combination of Two-Stage Optimized Active Control of Edgewise vibrations of Wind Turbine Blades by using Robotic Arms
, M.Sc. Thesis Sharif University of Technology ; Moradi, Hamed (Supervisor)
Abstract
Renewable energies and their various types have been recognized as sustainable solutions to address the challenges arising from increasing energy consumption and environmental issues. The use of wind energy as one of the renewable energy sources has particular advantages, considering it as one of the most sustainable energy sources. One of the key factors in wind turbine development is the diversity and multiplicity in their structural designs. Therefore, the design of wind turbine structures with characteristics such as suitable strength, high energy efficiency, optimal cost, and high reliability is of great importance. By employing various sciences such as vibrations and optimization in...
Effect of TiO2-based Nanocomposite Scattering Layer on Photovoltaic Characteristics of Dye Sensitized Solar Cell
, M.Sc. Thesis Sharif University of Technology ; Seyyed Reihani, Morteza (Supervisor) ; Mohammadi, Mohammad Reza (Supervisor)
Abstract
Many efforts have been put into increasing the efficiency of dye-sensitized solar cells that part of it has been devoted to structure and chemical composition of photoanode electrode. In this thesis, the effect of changes in the composition and its influence on light scattering ability in photoanode of dye sensitized solar cells was studied.First, the nanoparticles of titanium dioxide powder through solvothermal method as well as spherical particle and barium titanate powder by sol-gel method were synthesized. XRD and FE-SEM analyses indicated that synthesized powders are in good size and morphology regarding the intended chemical composition. Optical properties of TiO2 particles were...
Genome Engineering of Bacillus Subtilis Using CRISPR Technology to Overproduce Protease Production
, M.Sc. Thesis Sharif University of Technology ; Roostaazad, Reza (Supervisor) ; Banaei Moghaddam, Ali Mohammad (Supervisor)
Abstract
Enzymes are an important part of detergents, they reduce the activation energy of the reaction and thus increase the efficiency of the process. Protease enzyme is one of the most common enzymes in detergents. Bacillus strain is the most important strain in the production of this enzyme and among the species of Bacillus, Bacillus subtilis is the most used. Bacillus subtilis is a gram-positive, rod-shaped bacterium. This bacterium is considered a non-pathogenic cell that has the ability to form spores and prevent death and damage in harsh conditions. In this study, CRISPR system was used to modify the genome of Bacillus subtilis ATCC 6633 in order to increase alkaline protease. To increase the...
A misbehavior‐tolerant multipath routing protocol for wireless Ad hoc networks [electronic resource]
, Article International Journal of Research in Wireless Systems (IJRWS) ; Vol. 2, Issue 9, pp. , Sep. 2013 ; Pakravan, Mohammad Reza ; Aref, Mohammad Reza ; Sharif University of Technology
Abstract
Secure routing is a major key to service maintenance in ad hoc networks. Ad hoc nature exposes the network to several types of node misbehavior or attacks. As a result of the resource limitations in such networks nodes may have a tendency to behave selfishly. Selfish behavior can have drastic impacts on network performance. We have proposed a Misbehavior-Tolerant Multipath Routing protocol (MTMR) which detects and punishes all types of misbehavior such as selfish behavior, wormhole, sinkhole and grey-hole attacks. The protocol utilizes a proactive approach to enforce cooperation. In addition, it uses a novel data redirection method to mitigate the impact of node misbehavior on network...
Solvent effects on the reaction rate and selectivity of synchronous heterogeneous hydrogenation of cyclohexene and acetone in ionic liquid/alcohols mixtures
, Article Journal of Molecular Catalysis A: Chemical ; Volume 306, Issues 1–2 , July , 2009 , Pages 11–16 ; Habibi-Yangjeh, A. (Aziz) ; Gholamia, M. R. (Mohamad Reza) ; Sharif University of Tecnology
2009
Abstract
Synchronous heterogeneous catalytic hydrogenation of cyclohexene and acetone, catalyzed by Pt/Al2O3, was carried out in solutions of 2-hydroxy ethylammonium formate (a room temperature ionic liquid, RTIL) with ethanol and propan-1-ol at 25 °C. Rate constants and selectivity of the reaction (relative to cyclohexene hydrogenation) increase with mole fraction of the ionic liquid (IL). The reactants tendency to the catalyst surface increases by addition of the ionic liquid and thus the reaction rate increases, especially for cyclohexene hydrogenation. Consequently the selectivity to cyclohexene hydrogenation was increased. Single-parameter correlations of log kvs.π* (dipolarity/polarizibility)...
Increase Production of the Enzyme by Cell Genetic Modification
, M.Sc. Thesis Sharif University of Technology ; Roosta Azad, Reza (Supervisor) ; Banaei Moghaddam, Ali Mohammad (Supervisor)
Abstract
Genetic engineering of cells has been one of the most effective ways to increase protein production in wild strains. Among the various genetic engineering techniques, the CRISPR/Cas9 system that directly edits the cell chromosome, yielding greater efficiency and easier operation. In this study, we used this system to modify the genome of Bacillus subtilis ATCC 6633 to increase the production of extracellular alkaline protease enzyme. Alkaline protease enzyme has many applications in different industries, but in this study, the application of this enzyme in the detergent industry has been considered. To increase the production of this enzyme, we disrupted and prevented the gene responsible...
Application of Adversarial Training in Medical Signals
, M.Sc. Thesis Sharif University of Technology ; Rabiee, Hamid Reza (Supervisor) ; Rohban, Mohammad Hossein (Supervisor)
Abstract
Recent success of Deep Learning models, resulted in their evergrowing application in many fields. However these models usually require huge datasets, which can sometimes be hard to collect. One of the challenges related to medical data, is the Batch Effect; Medical data is usually gathered through multiple experiments. Each experiment might have a slightly different conditions than the other, resulting a shift in the data related to that batch. Batch effects can have more severe impact during testing time, as the shift in the data distribution could be bigger. Many methods have been proposed to reduce or remove the effect of external conditions on data distribution.Deep Learning models have...
Synthesis and Biocompatibility Evaluation of TiO2/Pyrolytic Carbon Core/Shell
, M.Sc. Thesis Sharif University of Technology ; Simchi, Abdolreza (Supervisor) ; Imani, Mohammad (Supervisor)
Abstract
Carbon-based thin films possess low friction coefficient, low surface roughness, chemical inertness and outstanding biocompatibility. In the present work, TiO2 nanoparticles were covered by a thin film of pyrolytic carbon (PyC) to provide a core-shell morphology. The PyC film was deposited by dehydrogenation of methane in a fluidized bed chemical vapour deposition (FBCVD) reactor at 1100 °C. The prepared specimens were characterized by various analytical methods including XRD, SEM, TEM, AFM, TGA and contact angle measurement techniques. Biocompatibility profiles of the resulting materials were evaluated using MTT and cell cycle assay. The results showed that the thin carbon film strongly...
Improving Subtilisin Production by Engineering the Regulatory Regions of aprE in Bacillus Subtilis
, M.Sc. Thesis Sharif University of Technology ; Banaei Moghaddam, Ali Mohammad (Supervisor) ; Yaghmaei, Soheyla (Supervisor) ; Roosta Azad, Reza (Supervisor)
Abstract
Industrial enzymes can generally be classified into three groups: carbohydrases, proteases and lipases, which account for a major part of the global enzyme trade. Proteases, in particular, have always been extensively studied and investigated due to their widespread use in various industries, such as food, pharmaceutical, chemical, and agricultural sectors. Proteases are a group of proteolytic enzymes that break down proteins and peptides into their constituent amino acids by hydrolyzing peptide bonds. Among the family of proteases, alkaline serine proteases have special biocatalytic abilities in both aqueous and organic environments. Their suitable resistance in alkaline environments and...