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rezaei-babadi--ebrahim
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Campbell on Naïve Ralism
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
The debate over the nature of perceptual states has been a significant part of the literature of philosophy of the mind during the past two decades. John Campbell's philosophical works on metaphysics and epistemology of sensory perception, according to many of his followers and critics, are among the most coherent contemporary philosophical works with recent advances in cognitive science. His research on the relationship between attention, reference, knowledge and spatial representations is to a large extent supported by scientific ideas in empirical psychology, and it can be said that most of his work is devoted to analyzing and solving the theoretical complexities deriving from empirical...
Development of a Kinetic Model for Thermal Cracking of Aromatic Hydrocarbon Feeds
, M.Sc. Thesis Sharif University of Technology ; Khorasheh, Farhad (Supervisor) ; Ivakpour, Javad (Supervisor)
Abstract
Most refineries are looking for a process in order to remove heavy compounds and convert them into lighter, more valuable materials. Among the various remaining upgrade processes, non-catalytic heating processes are very attractive and have gotten a wider scope worldwide because the feed used for the upgrade process is high in metal and sulfur, which causes the catalyst surface to become toxic and inactive. Due to that, the thermal cracking process is more suitable for such feeds than the catalytic cracking process. Due to the reduction of sweet crude oil resources and the heavier refinery feeds and increase in amount of global fuel needs, refineries must process a larger share of feed in...
Characteristics of heat and mass transfer in vapor absorption of falling film flow on a horizontal tube
, Article International Communications in Heat and Mass Transfer ; Volume 32, Issue 9 , 2005 , Pages 1253-1265 ; 07351933 (ISSN) ; Farhanieh, B ; Sharif University of Technology
2005
Abstract
The absorber is an important component in absorption machines and its characteristics have significant effects on the overall efficiency of absorption machines. This article reports on the results of numerical studies on the characteristics of falling film LiBr-H2O solution on a completely wetted horizontal tube and the associated vapor absorption in the Reynolds number range of 5 < Re < 100. The boundary layer assumptions are used for the transport of mass, momentum and energy equations and the finite difference method is employed to solve the governing equations in the film flow. The heat and mass transfer coefficients are expressed in the forms of Reynolds number, Prandtl number and...
An exact treatment of ellipsoid-substrate interactions
, Article EPL ; Volume 77, Issue 2 , 2007 ; 02955075 (ISSN) ; Ejtehadi, M. R ; Sharif University of Technology
2007
Abstract
We present an exact treatment of the pairwise surface interactions of biaxial ellipsoidal bodies and derive the exact explicit expressions for the attractive-repulsive Lennard-Jones(6-12) ellipsoid-substrate interactions. The applicability of the results at nanoscale as a coarse-grained description of molecule-substrate interactions has been studied through presenting parameterizations for a number of small biaxial molecules. The study concludes that the anisotropic coarse-grained potential reproduces the atomistic interactions of ellipsoid-like rigid molecules perfectly, with a negligible error of less than 3%. Copyright © EPLA, 2007
Partial Order Planning using Machine Learning Techniques
, M.Sc. Thesis Sharif University of Technology ; Ghassem-Sani, Gholamreza (Supervisor)
Abstract
Automated planning is a branch of artificial intelligence that studies intelligent agents’ decision making process.In planning, we can design agents that can decide on their own, about how to perform tasksthat are assigned to them. In classical planning, there is a restrictive assumption that actions in plans are totally ordered. By relaxing this restrictive assumption, partial order planninghas been created.Partial order planning uses a general principle, called the least commitment principle that results in a better performance than other classical planning methods. Yet, this branch of planning cannot compete with newer planning methods like heuristic search planning.That is why there has...
Analytical first derivatives of the RE-squared interaction potential
, Article Journal of Computational Physics ; Volume 219, Issue 2 , 2006 , Pages 770-779 ; 00219991 (ISSN) ; Ejtehadi, M. R ; Everaers, R ; Sharif University of Technology
Academic Press Inc
2006
Abstract
We derive exact expressions for the forces and torques between biaxial molecules interacting via the RE-squared potential, a recent variant of the Gay-Berne potential. Moreover, efficient routines have been provided for rigid body MD simulations, resulting in 1.6 times speedup compared to the two-point finite difference approach. It has also been shown that the time cost of a MD simulation will be almost equal to a similar MC simulation, making use of the provided routines. © 2006 Elsevier Inc. All rights reserved
Coarse-grained interaction potentials for anisotropic molecules
, Article Journal of Chemical Physics ; Volume 124, Issue 17 , 2006 ; 00219606 (ISSN) ; Everaers, R ; Ejtehadi, M. R ; Sharif University of Technology
2006
Abstract
We have proposed an efficient parametrization method for a recent variant of the Gay Berne potential for dissimilar and biaxial particles [Phys. Rev. E 67, 041710 (2003)] and demonstrated it for a set of small organic molecules. Compared with the previously proposed coarse-grained models, the new potential exhibits a superior performance in close contact and large distant interactions. The repercussions of thermal vibrations and elasticity have been studied through a statistical method. The study justifies that the potential of mean force is representable with the same functional form, extending the application of this coarse-grained description to a broader range of molecules. Moreover, the...
An adaptive feedback bit allocation method for wireless systems with transmit diversity
, Article 2005 1st International Conference on Computers, Communications and Signal Processing with Special Track on Biomedical Engineering, CCSP 2005, Kuala Lumpur, 14 November 2005 through 16 November 2005 ; 2005 , Pages 181-184 ; 1424400112 (ISBN); 9781424400119 (ISBN) ; Shariatpanahi, P ; Hossein Khalaj, B ; Sharif University of Technology
2005
Abstract
Using multiple antenna transmitters and/or receivers is becoming a common method for improving spectral efficiency of wireless channels. The physical layer of the next generation of WLAN systems (802.11n) is based on a Multiple Input Multiple Output (MIMO) system which seems to be an efficient solution for defects which could occur in wireless channels. In this paper, we investigate an adaptive bit allocation method to feed the quantized channel state data back to the transmitting antennas, depending on the channel condition in a Multiple Input Single Output (MISO) scheme. We have proposed an adaptive bit allocation scheme with a significant performance improvement over the fixed bit...
Model Predictive Control Based on Hybrid Neural Networks of a Fedbatch Yeast Production Fermenter
, M.Sc. Thesis Sharif University of Technology ; Pishvaie, Mahmood Reza (Supervisor)
Abstract
Due to underlying dynamic factors, many bioprocesses operate in semi-batch or batch processes without fixed points of operation. As a result, linear model-based control is not straightforward for these processes. Additionally, optimal policy design and successful control of constrained systems depend on having an appropriate dynamic model within the process scope. In bioprocessing, synthesizing and controlling such dynamic models presents numerous challenges, as most relationships are quasi-monod and involve parameter estimation from nonlinear reactor data. One approach to addressing this issue is using black box models like neural networks. However, employing purely artificial neural...
Investigating the Modal Status and the Epistemological Status of Identity Propositions of Proper Names According to the Kripke’s Doctrines
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
In Naming and Necessity and Identity and Necessity, Kripke convinced many that there are necessary propositions which are knowable only a posteriori. Kripke’s examples of these propositions can be placed into three categories: 1) Some mathematical propositions like Goldbach’s conjecture (the conjecture that every even integer greater than 2 can be expressed as the sum of two primes) 2) Scientific truths like “Water is H2O”, “Gold has the atomic number 79”, etc. 3) Identity statements flanked on both sides with proper names; like “Hesperus is Phosphorus”, “Cicero is Tully” and the like (in the rest of this article, these three categories will be called, respectively, the first, the second and...
Mind-Body Problem From Swinburne’s Point of View
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
In his Mind, Brain and Free Will, Swinburne introduces a new argument for substance dualism based on the synchronic unity of humans’ conscious experiences. He argues that the human body cannot be the substance of such a synchronic unity, and that this coexperiencing property, which is a mental property, is the essential property of the human substance: hence our substance is a mental substance. After providing a careful explanation of Swinburne’s subtle argument, I first try to demonstrate that it is metaphysically possible that the brain itself could instantiate such a synchronic unity without the need to presume another substance. Then I shall argue that it is unclear how to infer the...
Scientific and Philosophical Challenges of Theory of Evolution
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
This dissertation consists of three chapters. In the first chapter, a description of formation of Darwin's theory of Evolution is expressed. After that, the process of formation of modern theory of Evolution, along with an explanation of the theory of evolution and the evidence for it was mentioned. In the second season, which is responsible for the scientific study of the theory, at some point the evidence of this theory has been reviewed. After that, some of the challenges raised against this theory have been studied. The major scientific challenges described in this chapter is based on recent advances made in biology, based on that, the mechanism of theory can’t explain the complex...
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...
Living with Uncertainty
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
Michael Zimmerman in his book Living with Uncertainty has objected to two views of moral obligation, namely objective and subjective view. Two overcome these problems he suggests a third view which he calls prospective view and tells us that our moral obligation is determined by the prospection that each of our choices give us. In this thesis first I review Zimmerman’s objections to objective and subjective view. Then I try to suggest a solution for the objective view
Deep analysis of Growth’s Pattern of Technological Capabilities in Knowledge-based Companies: Case Studies in Four Different Sectors
, M.Sc. Thesis Sharif University of Technology ; Souzanchi, Ebrahim (Supervisor)
Abstract
Technological capabilities as one of the growth’s aspects in developing countries have gained focus for research in last years. This study attempt to analyze the pattern of technological capabilities in four different sectors including Optic, Aerospace, Pharmaceutical and Biotechnology. In each sectors four Iranian companies as the case studies are selected. After deep interviews with key people in each company, required data is gathered. Data in each company is analyzed. The results of analysis for companies in one sector are gathered for analyzing each sector. In order to evaluate technological capabilities, the time required to improve, lead-lag relationship for gaining higher levels of...
Philosophy of Literature: Post-Structuralists and Aristotelians on Literature and its Moral Implications in the Contemporary Times
,
M.Sc. Thesis
Sharif University of Technology
;
Azadegan, Ebrahim
(Supervisor)
Abstract
The relationship between art and philosophy has been disputed for a long time and its history goes back to the ancient Greece. The dominant literary form at that time was poetry or tragedy, which are the first side of this relationship. On the other side was philosophical ethics. Plato and Aristotle are the main protagonists in this quarrel, which is known as the "Ancient Quarrel". I will first examine this quarrel and follow its different forms in the modern era, in which Hegel plays a prominent role by proposing the "end of art" thesis. By examining the criticisms made to this thesis, I will make clear the context in which the contemporary defenses that I explained in the following...
Intentionality and Mental Models
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
One of the important issues in the philosophy of mind is the challange about the content of mental states, how the mind can refer to the world. To explain this special relationship that is not observed in the physical world, various mental models have been implemented, one of which is the connectionism model. Connectionist networks are based on the idea of biological neural networks, and the main concern of connectionism is modeling the brain and implementing human mind characteristics. The connectionist model was proposed by emphasizing the necessity of linking symbols with their original content and meaning. In this model, data representation is done in a holistic way and based on network...
?How Perceptions Coud be Theory-laden
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
One of the important problems in the history of philosophy of Mind &Science is to respond this question: whether our observations which are the basics of our experiences are theory laden or not? theory-ladenness of observation thesis has been endorsed by Duhem and hansen and thomas kuhn,generally theory-ladensess of observation devide in two concepts, firstly it means the affection of on the observable terms secondly it relates to the affection of theories on our perception and phenomenology of experience. fodor claims that theories has nothing to do with our observation and churchland claims vice versa, both of these philosophers mention their own reasons and in this thesis we are looking...
Probability and Causation: Based on Epistemological Approach
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
After Hume’s skeptical argument on the concept of causality and establishing the regularity theory of causation by him, it seemed that the regularity theory might not respond to irrelevance problems and spurious regularities. In the second half of the twentieth century, attempts were made, e.g. Hans Reichenbach's proposal of the “common cause principle,” for solving the problems of regularity theory which resulted in probabilistic approach to causal relationships. The importance of the common cause principle is that it has inspired the “Causal Markov Condition” which is the most fundamental condition for causal networks. The causal Markov condition states that a variable X is...
Nature of Normativity of Action
, M.Sc. Thesis Sharif University of Technology ; Azadegan, Ebrahim (Supervisor)
Abstract
When we talk about something being normative, it means that there are do’s and don’ts specific to that thing. When we say that language is normative, it means that it is governed by do's and don'ts and we cannot use linguistic structures arbitrarily. In other words, we have justifiable modes of linguistic use that failing to accord with them will distort the meaning of the propositions in the language. In the field of ethics, it may be easier to comprehend the concept of normativity. We all are in touch with ethics and ethical propositions in our daily lives. Beyond this bond, it seems that there is a kind of necessity for us. It seems that because of this necessity, acting in accordance...