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Production Study of Protease Enzyme by Immobilized Cells
,
M.Sc. Thesis
Sharif University of Technology
;
Yaghmaei, Soheila
(Supervisor)
;
Kazemi, Akhtarelmolook
(Supervisor)
Abstract
Microbial proteases are among the most important hydrolytic enzymes and havebeen studied extensively since the advent of enzymology. They are essentialconstituents of all forms of life on earth, including prokaryotes, fungi, plants andanimals.In recent years there has been a phenomenal increase in the use of alkaline protease asindustrial catalysts. Alkaline proteases (EC.3.4.21–24, 99) are defined as thoseproteases which are active in a neutral to alkaline pH range. Cell immobilization is a technique that restricts the free movements of microorganisms in the process and it has a lot of advantages including this fact that biotechnologists’ dream for using continuous system in fermentation...
Mint Flavor Immobilization and Properties Determination
, M.Sc. Thesis Sharif University of Technology ; Alemzadeh, Iran (Supervisor) ; Kazemi, Akhtarelmolook (Supervisor)
Abstract
Peppermint oil is one of the most often used food ingredients and it is volatile. Many common procedures such as microencapsulation have been used for protecting volatile food ingredients. For this research, L-menthol was chosen as the core material to be encapsulated. L-menthol is responsible for the minty flavor and cooling sensation of food and pharmaceutical products. The encapsulation of L-menthol was prepared by complex coacervation, using gum Arabic and gelatin as wall material and tannic acid as cross-linking agent. The effect of various processing parameters, including wall material, core material, tannic acid and tween¬80 concentrations, on particle size and efficiency was...
Ant colony algorithm for the shortest loop design problem [electronic resource]
, Article Computers and Industrial Engineering, Elsevier ; Volume 50, Issue 4, August 2006, Pages 358–366 ; Kazemi, Morteza ; Sharif University of Technology
Abstract
In this paper, a new algorithm for solving the shortest loop design problem is presented. The shortest loop design problem is to find the shortest loop for an automated guided vehicle covering at least one edge of each department of a block layout. In this paper, first it is shown that this problem can be represented as a graph model. The properties of the presented model enable us to design a meta-heuristic based on ant colony system algorithm for solving the shortest loop design problem. Computational results show the efficiency of our algorithm in compare to the other techniques
Propositional attitudes as commitments: unleashing some constraints
, Article Dialogue-Canadian Philosophical Review ; Volume 59, Issue 3 , 2020 , Pages 437-457 ; Sharif University of Technology
Cambridge University Press
2020
Abstract
In a series of articles, Asbjorn Steglich-Petersen and Nick Zangwill argue that, since propositional attitude (PA) ascription judgements do not behave like normative judgements in being subject to a priori normative supervenience and the Because Constraint, PAs cannot be constitutively normative.1 I argue that, for a specific version of normativism, according to which PAs are normative commitments, these arguments fail. To this end, I argue that commitments and obligations should be distinguished. Then, I show that the intuitions allegedly governing all normative judgements do not even purport to hold for commitment-attributing judgements. Copyright © Canadian Philosophical Association 2020
Commitment, norm-governedness and guidance
, Article Acta Analytica ; 2020 ; Sharif University of Technology
Springer
2020
Abstract
A number of philosophers have argued that there is a basic problem in the no-guidance argument against content normativism. The problem is that the argument restricts the essential normativity of intentional states to the formation of these states being guided by certain norms. But it is suggested that the essential norm-governedness of intentional states can be equally plausibly construed as the assessability of these states by norms, which does not imply complying with them. Although I concur with the problem diagnosed in the no-guidance argument, I take issue with the alternative conception of normativity which is put forward. In its stead, I argue that considering intentional states as...
Commitment, norm-governedness and guidance
, Article Acta Analytica ; Volume 36, Issue 2 , 2021 , Pages 213-228 ; 03535150 (ISSN) ; Sharif University of Technology
Springer Science and Business Media B.V
2021
Abstract
A number of philosophers have argued that there is a basic problem in the no-guidance argument against content normativism. The problem is that the argument restricts the essential normativity of intentional states to the formation of these states being guided by certain norms. But it is suggested that the essential norm-governedness of intentional states can be equally plausibly construed as the assessability of these states by norms, which does not imply complying with them. Although I concur with the problem diagnosed in the no-guidance argument, I take issue with the alternative conception of normativity which is put forward. In its stead, I argue that considering intentional states as...
Causal relations and abraham’s dilemma: a Qur’anic perspective
, Article Sophia ; 2021 ; 00381527 (ISSN) ; Sharif University of Technology
Springer Science and Business Media B.V
2021
Abstract
Abraham’s Dilemma is the conjunction of three jointly inconsistent propositions: (i) God’s commands are never morally wrong, (ii) God has commanded Abraham to kill his innocent son, and (iii) killing innocent people is morally wrong. Drawing on an overlooked point from the Qur’an regarding the content of the command as well as a conceptual analysis of intentional action, this paper proposes a novel solution to the dilemma by discarding proposition (ii) in a new way. Current approaches to rejecting proposition (ii) tend to appeal to epistemic failure on the side of Abraham. In my approach, which draws on the so-called accordion effect in intentional action, God’s command is interpreted in...
Still committed to the normativity of folk psychology
, Article Philosophical Explorations ; 2021 ; 13869795 (ISSN) ; Sharif University of Technology
Routledge
2021
Abstract
In what sense can one claim that intentional explanations are essentially normative, given that people’s actions and thinking are replete with various irrationalities, yet are still pretty well explained by this explanatory framework? This article provides a novel response to this enduring objection. First, following Brandom, it is suggested that, to understand the normativity of intentional states, we should countenance and distinguish between two normative categories of commitment and entitlement, only the former of which is argued to be essential for intentional explanations. Conflating these two normative dimensions is noted to be one of the main sources of the objections leveled against...
Causal relations and abraham’s dilemma: a Qur’anic perspective
, Article Sophia ; Volume 61, Issue 2 , 2022 , Pages 309-318 ; 00381527 (ISSN) ; Sharif University of Technology
Springer Science and Business Media B.V
2022
Abstract
Abraham’s Dilemma is the conjunction of three jointly inconsistent propositions: (i) God’s commands are never morally wrong, (ii) God has commanded Abraham to kill his innocent son, and (iii) killing innocent people is morally wrong. Drawing on an overlooked point from the Qur’an regarding the content of the command as well as a conceptual analysis of intentional action, this paper proposes a novel solution to the dilemma by discarding proposition (ii) in a new way. Current approaches to rejecting proposition (ii) tend to appeal to epistemic failure on the side of Abraham. In my approach, which draws on the so-called accordion effect in intentional action, God’s command is interpreted in...
Still committed to the normativity of folk psychology
, Article Philosophical Explorations ; Volume 25, Issue 1 , 2022 , Pages 58-74 ; 13869795 (ISSN) ; Sharif University of Technology
Routledge
2022
Abstract
In what sense can one claim that intentional explanations are essentially normative, given that people’s actions and thinking are replete with various irrationalities, yet are still pretty well explained by this explanatory framework? This article provides a novel response to this enduring objection. First, following Brandom, it is suggested that, to understand the normativity of intentional states, we should countenance and distinguish between two normative categories of commitment and entitlement, only the former of which is argued to be essential for intentional explanations. Conflating these two normative dimensions is noted to be one of the main sources of the objections leveled against...
Innovative Team Climate, Teamwork Quality and Team Performance in Software Development Teams
, M.Sc. Thesis Sharif University of Technology ; Kermanshah, Ali (Supervisor)
Abstract
In this dissertation, our aim is to evaluate a model linking “Teamwork Quality” and “Innovative Team Climate”. Teamwork Quality is defined as the quality of interactions among team members that includes six dimensions: “Communication”, “Coordination”, “Balance of Contribution”, “Mutual Support”, “Effort”, and “Cohesion”. Innovative Team Climate refers to shared perceptions of team policies, practices and procedures in support of innovation. This construct is composed of four dimensions: “Vision”, “Participation Safety”, “Task Orientation”, and “Support of Innovation”. Firstly, we hypothesized that there are positive relations between Innovative Team Climate and Teamwork Quality itself and...
Comparison Between Methods Of Synchronization In A Queue With Finite Customer Population
, M.Sc. Thesis Sharif University of Technology ; Mahlooji, Hashem (Supervisor)
Abstract
One technique to reduce variance of output in comparing two or more systems via simulation is random number synchronization. the primary technique for achieving synchronization is to assign an independent seed to each random process and then use the same collection of seeds across all systems . Another way of synchronization in systems with limited customer population is to assign different seed to each customer (transaction) and then use the same collection of seeds across all systems. The main Question to be considered here is which of these methods of synchronization can better reduce variance of output in a queue with finite customer population
Genco's Bidding Strategy in Day-Ahead Energy Market Considering Demand Response
, M.Sc. Thesis Sharif University of Technology ; Ehsan, Mehdi (Supervisor)
Abstract
Since 1980s the electricity market has been gradually evolving from a monopoly market into a liberalized one for encouraging competition and improving efficiency. This brings the opportunity for generation companies (Gencos) to make more profits while embracing more risks of not being dispatched. Therefore, it has become a core interest for the Gencos to develop optimal bidding strategies to maximize the profits and minimize the risks while participating in such a competitive market. Error of determining day-ahead electricity price is one of the sources of the risk. Energy price has a high impact on bidding strategy optimization process. So it should be determined with low error which is not...
Adaptive Compensation of Effect of Slow Dynamic Actuators in Robots Without Output Torque Measurement
, M.Sc. Thesis Sharif University of Technology ; Namvar, Mehrzad (Supervisor)
Abstract
A motion tracking control design of an n-DOF rigid robot by taking into account its actuator dynamics is proposed in this paper using backstepping technique. neglecting actuator dynamics in control of rigid robot manipulators can degrade the performance and loss of stability. However,consideration of actuator dynamics entails joint torque or armature currents measurement. In this study, torque measurement has been avoided using an torque estimator.. Finally, Semi-global convergence for motion tracking error are proven. In addition, A simulation example of a two-link robotic manipulator is also given to clarify the effectiveness of proposed design method. Considering actuator dynamics entails...
Scouring Contol by Submerged Vanes at 90° Open-Channel Junctions
, M.Sc. Thesis Sharif University of Technology ; Borghei, Mahmoud (Supervisor)
Abstract
In this study, the effect of submerged vanes on the bed scouring and deposition pattern at a 90̊ open-channel junction was investigated. First, the bed formation without submerged vanes were studied under the effect of hydraulic variables like the discharge ratio of tributary to main channel and the ratio of mean approach velocity to the threshold velocity. The results show that scour holes enlarge with time while they move towards the downstream and the outer wall in the main channel. Also, by increasing the ratio of mean approach velocity to the threshold velocity about 0.5, the maximum scour depth occurred at the downstream junction corner with time. In the second stage, the proper vane...
Optimum Highway Alignment Using Parallel Processing
, M.Sc. Thesis Sharif University of Technology ; Shafahi, Yusof (Supervisor)
Abstract
Optimum highway alignment problem is among the most substantial but large and complicated topics in transportation area. Infinite number of feasible solutions, numerous local optima and the constrained feature of the problem, associated with complex and mainly non-linear constrains, has put an extra effort into the problem-solving process. Moreover, the problem has a sensitive objective function to input variables. Due to the nature of the problem, conventional methods fail to find any exact solution, and so, using heuristic methods during the solving procedure is inevitable. Large-scale, complexity and sensitivity of the problem leads to a solution which is time-consuming and...
Model Checking of Real-time Coordination Systems
, M.Sc. Thesis Sharif University of Technology ; Izadi, Mohammad (Supervisor)
Abstract
The main goal of this thesis is to verify real-time properties of timed coordinated systems specified by timed-Reo circuits using the model checking techniqe. We use Timed Buchi Automata of Records (TBAR) as the semantics of timed-Reo. The model checking is done by converting Timed Buchi Automata of Records to an extension of Timed Automata that are usingas input of UPPAAL tool. We introduce a writer-automaton, which is synchronous with the desired Timed Automata, for initializing input ports. A tool that transforms Timed Buchi Automata of Records to UPPAAL Timed Automata has been implemented. Finally, two model checking case studies are examined by usingof our implemented tool over UPPAAL
Wilfrid Sellars on Science and Reality
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
Wilfrid Stalker Sellars (1912-1989) is an analytic philosopher whose philosophy is famous for being deep, systematic and extremely influential and notorious for being difficult to read. Although he has many original and interconnected ideas in different branches of philosophy- including metaphysics, epistemology, philosophy of mind, ethics, philosophy of language and meta-philosophy- the place of science in his system is completely indispensable. In his meta-philosophy, Sellars defines his philosophical project as an attempt to reconcile two distinct world-views of humanity in the modern word; scientific image and manifest image. Approaching Sellars’ philosophy by placing science at the...
Adaptive compensation of actuator dynamics in manipulators without joint torque measurement
, Article Proceedings of the IEEE Conference on Decision and Contro ; December , 2013 , Pages 2294-2299 ; 01912216 (ISSN) ; 9781467357173 (ISBN) ; Namvar, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2013
Abstract
Neglecting actuator dynamics in control of rigid manipulators can degrade performance and stability of the system. However, consideration of actuator dynamics usually requires measurement of joint torque or armature currents. In this paper, we present an adaptive controller for motion tracking of an n-DOF manipulator without using joint torque measurement. Semi-global convergence of motion and torque tracking errors to zero is proven. We show that the use of non-minimal representation of manipulator dynamics significantly simplifies its linear parametrization. Simulation example shows that avoiding joint torque measurement reduces system sensitivity to sensor failure and noise
Synthesis of Azacrown Macrocyclic Ligand with Pendant Arms and Study of Their Complexation with [60] Fullerene and Cu(II) Cation
, M.Sc. Thesis Sharif University of Technology ; Ghanbari, Bahram (Supervisor)
Abstract
In this research, four N2O2–azacrown macrocyclic ligands with naphthalene pendant arms (L1-L4) were synthesized using direct synthesis. The products were characterized applying 1H and 13C {1H} NMR spectroscopy, IR and Mass spectrometry. Interaction of these ligands with [60]fullerene and Cu(II) were monitored respectively by fluorescent as well as UV-vis spectroscopy and applying Benesi-Hildebrand equation. These intercations were compared with N2O2 macrocyclic ligands in previous experiments in terms of their calculated association constants (Ka). According to our results, the presence of naphthalene pendant arm groups led to increase the interaction with [60]fullerene compared to the...