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Scaling inertia properties of a manipulator payload for 0-g emulation of spacecraft
, Article International Journal of Robotics Research ; Volume 28, Issue 7 , 2009 , Pages 883-894 ; 02783649 (ISSN) ; Namvar, M ; Sharif University of Technology
2009
Abstract
This paper presents a method to control a manipulator system grasping a rigid-body payload so that the motion of the combined system as a consequence of external applied forces is the same as any other free-floating rigid-body (with different inertial properties). This allows 0-g emulation of a scaled spacecraft prototype under the test in a 1-g laboratory environment. The controller consisting of motion feedback and force/moment feedback adjusts the motion of the test spacecraft so as to match that of the flight spacecraft, even if the latter has flexible appendages (such as solar panels) and the former is rigid. The stability of the overall system is analytically investigated, and the...
Stability Analysis of High Rise Structures Using the IDA Method
, M.Sc. Thesis Sharif University of Technology ; Khaloo, Alireza (Supervisor)
Abstract
The increased height of high-rise structures has made the effects of reduced stability a crucial factor in structural analysis and design. There are a variety of methods for analyzing the stability of high-rise structures. This thesis discusses nonlinear finite element method for analyzing the stability of a three-dimensional 50-storey concrete structure with a height of 150 meter using increment dynamic analysis (IDA). The IDA was first proposed by Bertero.v and it has been adopted in a variety of manners by researchers. In recent years, this method has been confirmed by EEMA. Moreover, FEMA350, FEMA351 and FEMA P695 guidelines have paid special attention to this method for determining...
Design of Novel Drugs Based on Tyrosine and Phenylalanine Amino Acids to Inhibit Cyclin-Dependent Kinases 2 (CDK2) Proteins Modeled on Flavopiridol Drug
, M.Sc. Thesis Sharif University of Technology ; Fattahi, Alireza (Supervisor)
Abstract
Cyclin-dependent kinases 2 (CDK2) are one of the important proteins in cell cycle regulation and progression. In many human cancer cells, the activity of CDK2 kinases and their related subunits are deregulated, leading to tumor formation. Therefore, inhibition of this enzyme as an attractive therapeutic target can cause cancer cell death in glioblastoma and diffuse large B-cell lymphoma. Using new pharmaceutical structures based on sugar and amino acids is a new approach due to its greater efficacy and fewer side effects than old drugs. In this research, according to the structure of Flavopiridol as one of the CDK2 inhibitors, the active site of CDK2, and the structure of ATP molecule, 50...
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...
Design, Synthesis and Use of Transition Metal Oxide Spinels (Cobalt and Iron) as Catalysts in Organic Reactions
, M.Sc. Thesis Sharif University of Technology ; Matloubi Moghadam, Firouz (Supervisor)
Abstract
Bread scraps with transition metals oxides spinels have been utilized to synthesize¬ magnetic nanocatalyst. The heterogeneous catalyst was characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The reaction was performed for tandem Knoevenagel-Micheal reaction in the presence of synthesized nanocatalyst as a heterogeneous, environmentally benign, cost-effective catalyst with high catalytic activity using EtOH as a green solvent. The magnetic nanocatalyst was applied to synthesize tetraketones and pyranopyrazoles...
Analysing the Effects of Monetizing Energy Carriers Subsidy on Expenditures and Welfare Criteria of Iranian Households
, M.Sc. Thesis Sharif University of Technology ; Fatemi, Farshad (Supervisor)
Abstract
In this thesis, with a review on policy simulation and economic reform analysis literature, we design a suitable method to analyze the effects of monetizing energy carriers subsidy on welfare criteria of Iranian households. The selected method is limited general equilibrium that needs demand estimates of goods, services and energy. In firs step,based on 13 years of data on “Iranian Households’ Expenditures and Income” surveys, data are provided as a pseudo-panel. Demand equations are estimated using “Seemingly Unrelated Regressions” for panel data, and elasticities are calculated. In the next step, we evaluated the equivalent variation and equivalent gain measures in each price scenarios....
Adverse Selection in Iranian Life Insurance Market
, M.Sc. Thesis Sharif University of Technology ; Fatemi, Farshad (Supervisor)
Abstract
This thesis finds evidence for the presence of adverse selection in the Iranian life insurance market. We use a unique dataset including more than one million policyholders’ profile information alongside their chosen life insurance coverage from the largest Iranian insurance company. Our results not only find evidence in support of adverse selection in this market, but also consider the magnitude of adverse selection relatively notable. Moreover, we found that in addition to the coverage, the other dimensions of contract could be the potential source of adverse selection. Particularly, we focused on the insurance duration and the payment method (monthly, annually, all-in-advance)....
Hubert Dreyfus on the Impossibility of Artificial Intelligence: Consequences and Implications
, M.Sc. Thesis Sharif University of Technology ; Sefidkhosh, Maysam (Supervisor) ; Taqavi, Mostafa ($item.subfieldsMap.e)
Abstract
Hubert Dreyfus other than being a prominent philosopher is amongst early critics of classical artificial intelligence project which was initialized during 1955-1960. Challenging the rationalist presuppositions of this paradigm, he foresaw various situations where mechanical artificial intelligence based upon modeling the world through symbolic representation and mimicking reason by formalized rules would fail to deliver even remotely similar outputs in digital computers as in human though process and problem solving ability.Twenty years later it became obvious for AI researchers that obstacles like frame problem or lack of common sense would follow their projects no matter what computing...
Distributed Publisher-Subscriber Pattern for Content-Based Routing in Software Defined Networks
, M.Sc. Thesis Sharif University of Technology ; Hemmat Yar, Ali Mohammad Afshin (Supervisor)
Abstract
Content-based routing, as provided by publisher/subscriber systems,has evolved as a key paradigm for interactions between loosely coupled application components (content publishers and subscribers). Content-based routing aims to increase the efficiency of forwarding by utilizing the diversity of information exchanged between application components. Using content-based forwarding rules (also called content filters) installed on content-based routers (also termed brokers), bandwidth-efficiency is increased by only forwarding content to the subset of subscribers who are actually interested in the published content. Many middle-ware implementations for content-based publish/subscribe have been...
Dynamic mutual manufacturing and transportation routing service selection for cloud manufacturing with multi-period service-demand matching
, Article PeerJ Computer Science ; Volume 7 , 2021 , Pages 1-30 ; 23765992 (ISSN) ; Valilai, O.F ; Haji, A ; Khalilzadeh, M ; Sharif University of Technology
PeerJ Inc
2021
Abstract
Recently, manufacturing firms and logistics service providers have been encouraged to deploy the most recent features of Information Technology (IT) to prevail in the competitive circumstances of manufacturing industries. Industry 4.0 and Cloud manufacturing (CMfg), accompanied by a service-oriented architecture model, have been regarded as renowned approaches to enable and facilitate the transition of conventional manufacturing business models into more efficient and productive ones. Furthermore, there is an aptness among the manufacturing and logistics businesses as service providers to synergize and cut down the investment and operational costs via sharing logistics fleet and production...
Analyses of Effect of Bank Branching on Deposit Market Share and Market Size in Iran Banking Industry
, M.Sc. Thesis Sharif University of Technology ; Fatemi, Farshad (Supervisor)
Abstract
This thesis aim to the study of the effect of bank’s branching decisions on deposit market. Using panel data banks from Iran, we study effect of branching on market share and market size. In theoretical part, we assume that banks maximize discounted flow of the profits. We also assume that the banks take into account the reaction from rival banks in setting number of branches. Banks are assumed to expect the rival banks react by a lag of one period. In empirical part, in order to distinguish between aggregate market size effect and market share effect, we rewrite quantity of deposit in banks as the product of aggregate deposit and market share. We specify deposit market share function with...
Investigation of Hamrahe-Aval Demand Services
, M.Sc. Thesis Sharif University of Technology ; Fatemi, Farshad (Supervisor)
Abstract
In the past few years mobile usage is increasing in Iran. Since mobile industry is growing and new innovations are presented, the competition between operators is rising. Although this competition has a great influence on the mobile demand for each operator, lack of the data of the all operators made us to use the data of one of the operators to investigate the demand. Based on the subscriber’s data of Hamrahe-Aval company, it has been introduced an estimation of a demand system for customers of this company by using AIDS model in this essay. This model includes three groups of services: sending short messages, calling to mobile numbers and calling to fixed numbers.
This study has two...
This study has two...
The Static and Dynamic Relationship between Monetary and Multidimensional Poverty Approaches
, M.Sc. Thesis Sharif University of Technology ; Fatemi Ardestani, Farshad (Supervisor)
Abstract
The identification of the poor and the elimination of their poverty always has been the subject of discussion among researchers and policymakers. Today, most researchers consider poverty as a multidimensional phenomenon, and in addition to income indicator, it has indicators related to the level of knowledge, awareness, well-being and the health of individuals. The study of multidimensional poverty and the search for the discovery of its static and dynamic relationship with income-based poverty is the subject of this research. The analysis shows that both statically and dynamically, there is a substantial mismatch in the identification of the poor households according to these two...
Does Childbearing Behavior of the Parents Confirm the Existence of Gender Preference in Iran?
, M.Sc. Thesis Sharif University of Technology ; Fatemi, Farshad (Supervisor)
Abstract
Since the mid-twentieth century, the issue of gender preference has always been of interest to economists. This preference is demonstrated by sex-selection methods such as differential stopping behavior and sex-selective abortion. While it is almost impossible to look directly into abortion behavior in Iran, due to religious beliefs and illegality, we can investigate gender preference by calculating to what extent parents adapt their fertility behavior to ensure the birth of preferred sex. For this purpose, we use “Households Income and Expenditure Survey of 2019” data from the Statistical Center of Iran. Our results indicate that when Iranian parents are deciding to have second child, they...
Dynamic mutual manufacturing and transportation routing service selection for cloud manufacturing with multi-period service-demand matching
, Article PeerJ Computer Science ; Volume 7 , 2021 , Pages 1-30 ; 23765992 (ISSN) ; Fatahi Valilai, O ; Haji, A ; Khalilzadeh, M ; Sharif University of Technology
PeerJ Inc
2021
Abstract
Recently, manufacturing firms and logistics service providers have been encouraged to deploy the most recent features of Information Technology (IT) to prevail in the competitive circumstances of manufacturing industries. Industry 4.0 and Cloud manufacturing (CMfg), accompanied by a service-oriented architecture model, have been regarded as renowned approaches to enable and facilitate the transition of conventional manufacturing business models into more efficient and productive ones. Furthermore, there is an aptness among the manufacturing and logistics businesses as service providers to synergize and cut down the investment and operational costs via sharing logistics fleet and production...
Investigating Sex Preferences in Iran
, M.Sc. Thesis Sharif University of Technology ; Fatemi, Farshad (Supervisor)
Abstract
The question of whether sex preferences are present in a certain country has long been of interest for economists and demographers. This study first investigates the existence of these preferences among Iranian parents. Next, if any preference are present, it turns to the task of inferring the quality of the observed preferences. There are two widely used methods for addressing these issues in the literature. The first method is to estimate a Logit model which relates the probability of a mother giving birth to a new child, to the sexes of her previous children. The second one is to estimate a Proportional Hazard model in order to investigate the relationship of the time interval between...
Physician Induced Demand Case Study of Caesarean Section in Iran
, M.Sc. Thesis Sharif University of Technology ; Fatemi Ardestani, Farshad (Supervisor)
Abstract
In standard models, the demand function is considered to be independent from the supply function and the intersection of these curves is considered to determine the price and quantity in the market. The alternative model, called “inducement hypothesis”, describes how the supply side can persuade consumers through particular advices, induce demand for the provided services and though shift the demand curve; i.e. demand is not independent from supply. For the case of physicians, this hypothesis is known as “physician induced demand”. In fact, this theory describes the supply-side moral hazard in the production market. This hypothesis may have vast applications which are different from...
Investigating Effective Determinants of Driving Offences in Iran
, M.Sc. Thesis Sharif University of Technology ; Fatemi Ardestani, Farshad (Supervisor)
Abstract
In Economic literature, investigating effective determinants of driving offences is discussed in Economics of Crime. In this field the effect of economic and sometimes non-economic parameters on offences are investigated. Economics of Crime was introduced as a branch of economics after Becker (1968). Since then different studies have been done and many theories have been made to discuss the relation between economic Variables and crimes in the society. In this study we use a cross-province panel data of driving offences to investigate the Effective Determinants of these offences. The most important result is the deterring effect of the penalty. For example in the regression for the seventeen...
Evaluation of Gender Discrimination in the Allocation of Educational Expenditure in the Iranian’s Household
,
M.Sc. Thesis
Sharif University of Technology
;
Fatemi Ardestani, Farshad
(Supervisor)
Abstract
In the past few decades a range of human capital theories were developed by economists. In all these, education and training are considered as a prominent aspect of the human capital. Among all influential factors on the education, the role of the family in the allocation of educational expenditure is one of the most important factors. In this research, we investigate whether in gendr discrimination among sibiling is observed in Iranian households. Based on household budget data, we estimate the Engel curve in order to investigate the gender discrimination in the allocation of educational expenditure. Families divided into 6 clusters based on the composition of their children and the tests...
Investing Parent’s Preferences on Quality and Quantity of Their Children: a Case Study of Iranian Society, from 1385 to 1390
, M.Sc. Thesis Sharif University of Technology ; Fatemi Ardestani, Farshad (Supervisor)
Abstract
This thesis aims to the study of quality-quantity trade off in the family through investigating the effects of family size and birth order on their educational attainment. The latter has been chosen as a criteria for measuring the quality; to measure the effects of quantity we have used the twins for the instrumental variable as an endogenous shock in the family size to reduce bias that happens as a result of omitted variables bias and to measure the effect of family size on it’s quality more accurately. We have also used censored regression to eliminate the bias of student children in the sample.In addition to concentrating on the differences between children of different family sizes we...