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salari--alinaghi
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Organizational Learning Measurement in Organizational Processes: A Case Study in Assessing Learning in New Product Development in System Group Co.
,
M.Sc. Thesis
Sharif University of Technology
;
Mashayekhi, Alinaghi
(Supervisor)
Abstract
Organizational learning is essential for organizations to grow and survive. Organizations can gain competitive advantage through proper organizational learning. Number of studies in this field in recent years shows the importance of this issue among practioners and academics. The first step in managing organzaitonal learning is its measurement. Organizations can be provided with solutions if an appropriate measurement tool is designed. The main question of this research is whether this tool can be designed or not so that organizational learning in organizational processes can be measured. Despite the significance of organizational learning measurement, the current studies in this field lack...
The Use of Social Marketing Approach to Motivate Schools to Teach Students Systematic Thinking
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor)
Abstract
One of Iran’s most important priorities at present is the development of the human resources and one of the most important skills of this human resource is decision making and problem solving. During the past few years, there have been numerous criticisms about the educational system in Iran without a substantial solution being offered to replace the existing approach. Aseman Group has been trying to promote system thinking in children. In Aseman, they believe that system thinking is one probable solution in order to develop thinking, decision making and problem solving skills in our human resource at early age. However, one of the many problems facing this group, is the resistance shown by...
A System Dynamics Approach to Understanding the Dynamics of the Increase of Health Expenditures Share of GDP in Germany
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor)
Abstract
The main question of this research is this: what mechanisms drive the increase of the share of health costs in GDP in Germany? Answering this question not only improves our understanding about health systems in general, but also is specifically useful for the health system of Iran, since it is experiencing similar trends as the health system of Germany does. Since these mechanisms are complex and the ability of human brain to process several interacting variables simultaneously is low, we need a strong methodology and a tool to overcome this limitation. System thinking as a methodology and system dynamics as its tool help us do so. Using system dynamics, we will develop a computer model...
Determining the Challenges to change the Project-based Strategy into Product-Based Strategy and the Solutions to Confront them in Iranian Companies
,
M.Sc. Thesis
Sharif University of Technology
;
Mashayekhi, Alinaghi
(Supervisor)
An ACO algorithm for the graph coloring problem [electronic resource]
, Article Computational Intelligence Methods and Applications, ICSC Congress on ; 2005 ; Eshghi, Kourosh ; Sharif University of Technology
Abstract
Ant colony optimization (ACO) is a well-known metaheuristic in which a colony of artificial ants cooperate in exploring good solutions to a combinatorial optimization problem. In this paper, an ACO algorithm is presented for the graph coloring problem. This ACO algorithm conforms to max-min ant system structure and exploits a local search heuristic to improve its performance. Experimental results on DIMACS test instances show improvements over existing ACO algorithms of the graph coloring problem
A Study of Frameworks Leading to Organizational Learning in High Schools of Mofid Educational Center in the last Decade
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor)
Abstract
The purpose of this research is to determine and measure the mechanisms which cause an increase in pace, scope and intensity of organizational learning at schoolsand four levels are defined in it for learning concept at a high school: beginner, struggling, developed and learning. Having learning capacity increased, the school upgrades to another level. The features of organizational learning are different at each one of the above cited levels. At the beginner level, learning takes place little by little and at a very low pace, and its effect is observable as professional transformation of the organization members. At higher levels, it occurs at a higher rate and enjoys a wider scope and...
The Impact of Corporate Governance on the Survival of the Organizations
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor)
Abstract
This study examines the impact of Corporate Governance on the survival of firms. The main goal in this research is to find the most important factors of Corporate Governance affecting the survival of a firm. Research method is qualitative. Survival is binary. It means whether a firm is alive or bankrupt. All samples used in this research are alive, but they are different in the extent they hope to be alive. So, first of all the criteria that estimate the hope of survival of a firm are defined using the literature of survival. In the next step, some firms are selected that are different in the extent they hope to survive. Next, these firms are compared in their quality of Corporate...
Exploring Administrative Mechanisms in Headquarter-Subsidiary Relationship based on Subsidiary’s Business Context – Study of an Iranian Corporation
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor)
Abstract
Recently, the number of multi business companies in Iran has increased. Nevertheless, they are challenged with several management and control issues, due to an unstable business and political environment in Iran as well as a lack of comprehensive knowledge in related fields. Thus conducting studies to address these issues in Iran’s special context would have a suitable impact on the successful management of these multi business companies. The main objective of this study is to determine suitable management mechanisms for regulating subsidiary-parent relationship. These mechanisms should be selected in a way to be aligned with subsidiary’s business context, which would lead to create benefit...
Measuring the Extent of Usage of Different Levers of Control in Three Iranian Companies with Different Value Creation Logics
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor)
Abstract
The purpose of this research has been measuring how much studied companies use different levers of controls. Management control system has been described as the system which ensures the organization about implementing its strategy (Antony, 2004; Simons, 1995). In this research we chose Levers of Control framework (Simons, 1995) as the proper model to describe management control systems in organizations. Using related literatures, we developed a questionnaire to measure how much different organizations use each levers of control. The proposed questionnaire was distributed in three businesses with different Value Creation Logics (Stabell & Fjeldstad, 1998), to provide a ...
Review and Critique of the Philosophical Foundations of Enactment Environmemt Theory from the Perspective Islamic Thought with Emphasis on the Motahari View
, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi (Supervisor) ; Gaeeini, Abolfazl (Co-Advisor)
Abstract
There are six core concepts in the organization theories that theorists rely on. These six concepts are: environment , social structure, technology, culture, physical structure, power and control. the insights of theorists about each of these concepts lead to different theory in case, they argue. The enactment environment theory by carl weik, is one way of conceptualizing the organizational environment within the interpretive paradigm and offer an approach about the organization and its environment. The logic of the enactment environment theory based on the belief that organizational realities parallel to people interact and negotiate and make sense of their experiences are socially...
Fabrication of sintered porous polymeric materials: effect of chain interdiffusion time on mechanical properties
, Article Polymer International ; Volume 67, Issue 4 , 2018 , Pages 422-430 ; 09598103 (ISSN) ; Pircheraghi, G ; Sharif University of Technology
John Wiley and Sons Ltd
2018
Abstract
In this study, sintered porous polymeric materials made of high density polyethylene (HDPE) were fabricated through controlling the chain interdiffusion time at the transition temperature of semicrystalline and melt states. At this intermediate state, where both crystalline and amorphous phases coexist, the interfacial welding of HDPE particles is facilitated thanks to interdiffusion caused by chain relaxation phenomena. Then, by assuming a spherical shape and a cubic packing configuration of particles, a geometrical model was developed to predict porosity variations as sintering progresses. Moreover, the HDPE used, as a broad molecular weight distributed polymer, has different family chains...
Interdiffusion versus crystallization at semicrystalline interfaces of sintered porous materials
, Article Polymer ; Volume 156 , 2018 , Pages 54-65 ; 00323861 (ISSN) ; Pircheraghi, G ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
Sintering process at temperature intervals close to the melting point of polymers is greatly important due to its role in synthesizing porous materials. During sintering, particles of polymeric materials coalesce throughout a process called interdiffusion. On the contrary, crystallization strongly affects the interdiffusion process at temperature intervals below and close to the melting point. Apparently, the outcome of the contention between these two factors would determine the interfacial width. Therefore, the current study presents a model, which takes both crystallization and interdiffusion into account, to predict sintering kinetic. Consequently, interfacial strength was assessed with...
Facile template-free synthesis of new α-MnO2 nanorod/silver iodide p-n junction nanocomposites with high photocatalytic performance
, Article New Journal of Chemistry ; Volume 44, Issue 18 , 2020 , Pages 7401-7411 ; Kohantorabi, M ; Sharif University of Technology
Royal Society of Chemistry
2020
Abstract
In the present study, a novel α-MnO2/AgI photocatalyst was successfully fabricated by using hydrothermal/precipitation methods, and its photocatalytic performance was evaluated from the degradation of Acid blue 92 (AB92) dye under visible light irradiation. The surface and crystalline structure, morphology, and electro-chemical properties of the as-made photocatalyst were investigated by BET, XRD, XPS, SEM-EDS, TEM, DRS, PL, PC, and Raman analysis. The optimized nanocomposite (α-MnO2/AgI) with a weight ratio of 1:15 showed the best photocatalytic activity in the decomposition of AB92 with a removal efficiency of 100% in 40 min which was better than that of pure α-MnO2 (48%) and AgI (61%),...
Fabrication of novel Fe2O3/MoO3/AgBr nanocomposites with enhanced photocatalytic activity under visible light irradiation for organic pollutant degradation
, Article Advanced Powder Technology ; Volume 31, Issue 1 , 2020 , Pages 493-503 ; Kohantorabi, M ; Sharif University of Technology
Elsevier B.V
2020
Abstract
In the present work, the novel ternary Fe2O3/MoO3/AgBr photocatalyst with different dosages of AgBr was successfully synthesized via a facile method. The physicochemical properties of the resultant catalyst were characterized by using various techniques such as XRD, SEM, EDX, BET, XPS, DRS, and VSM. The photocatalytic performance of as-prepared samples was evaluated by degradation of organic dye acid blue 92 (AB92) under visible light irradiation, and in dark. The impact of different operating parameters namely calcination temperature, amount of photocatalyst, dye concentration, and pH of solution were investigated in degradation reaction. Ternary nanocomposite exhibited the best...
Effect of microstructural inhomogeneities on texture evolution in 90-10 Brass sheets
, Article Journal of Materials Processing Technology ; Volume 182, Issue 1-3 , 2007 , Pages 440-444 ; 09240136 (ISSN) ; Akbarzadeh, A ; Sharif University of Technology
2007
Abstract
The control of texture and microstructure can be achieved by an appropriate thermomechanical treatment in industrial production. The effects of finish rolling temperature, cold reduction and annealing temperature on texture development and microstructure in Brass sheet were investigated. The role of deformation inhomogeneities on texture evolution has been considered. The formation of transition bands during hot rolling enforced the intensity of cube components. Shear bands increased the intensities of S and Cu components after cold rolling and at higher cold reductions. Transition from Cu to Y and Y to Bs was completed better because of mechanical twinning. Thermal twins annihilated the...
Heterogeneous photocatalytic degradation of organic pollutant in aqueous solutions by S-scheme heterojunction in nickel molybdate nanocomposites
, Article Journal of Environmental Chemical Engineering ; Volume 9, Issue 5 , 2021 ; 22133437 (ISSN) ; Kohantorabi, M ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
A novel ɑ-NiMoO4/ɑ-MoO3 binary nanocomposite was fabricated by using facile method. The fabricated nanocomposite was characterized by various techniques, and the photocatalytic activity was evaluated in degradation of Acid blue 92 dye. Among of as-made photocatalysts with various weight ratios of ɑ-MoO3, ɑ-NiMoO4/ɑ-MoO3 (1:5%w/w) exhibited the best photocatalytic performance, and selected as optimum photocatalyst. Under optimum reaction conditions ([dye] = 10 mg L−1, [catalyst] = 200 mg L−1, and pH = 7.0), complete removal efficiency was obtained within 100 min. Also, the first-order rate constant value of reaction in the presence of ɑ-NiMoO4/ɑ-MoO3 was calculated to be 0.032 min−1 that was...
An ACO algorithm for graph coloring problem
, Article 2005 ICSC Congress on Computational Intelligence Methods and Applications, Istanbul, 15 December 2005 through 17 December 2005 ; Volume 2005 , 2005 ; 1424400201 (ISBN); 9781424400201 (ISBN) ; Eshghi, K ; Sharif University of Technology
2005
Abstract
Ant Colony Optimization (ACO) is a well-known metaheuristic in which a colony of artificial ants cooperate in exploring good solutions to a combinatorial optimization problem. In this paper, an ACO algorithm is presented for the graph coloring problem. This ACO algorithm conforms to Max-Min Ant System structure and exploits a local search heuristic to improve its performance. Experimental results on DIMACS test instances show improvements over existing ACO algorithms of the graph coloring problem
Experimental Study of Microbubbles Generation as a Contrast Agent in Blood, to Determine the Blood Flow by Echo-PIV Method
, M.Sc. Thesis Sharif University of Technology ; Shafiee, Behshad (Supervisor)
Abstract
Today microbubbles are broadly used as ultrasound contrast agents. These bubbles enhance the image resolution of B-mode pictures. Flow focusing in microchannels could provide us the goal of one-size bubbles generation. Microbubbles could use as tracers in Echo_PIV method to determine the velocity profile in main body vessels such as carotid. In this paper we introduce a new production method to fabricate a low-cost microchannel for preparing Microbubble contrast agents (less than 50 microns) by using some surface active agents and a viscosity enhancing material to obtain appropriate Microbubbles with desired life time and stability for any in vitro infusion for velocity measurement. By...
, M.Sc. Thesis Sharif University of Technology ; Farhanieh, Bijan (Supervisor)
Abstract
Centrifugal Fans are widely used in industrial and commercial applications, from shop ventilation to material handling to boiler applications. They consume extremely high amount of energy each year. Because of this high consumption, even a small efficiency improvement could led to high amount of energy saving. Many projects have been done with this goal up to now, and present work is one of them, with aim to optimize a industrial centrifugal BI fan performance, with wheel diameter about 400 mm. The research has been done based on 3D numerical methods, done by commercial code Fluent 6.3, in steady state. MRF and k-E models have been used to simulate flow around blades, and turbulence...
A Risk based Project value Model to Obtain the Optimum Value of Activities’ Costs
, M.Sc. Thesis Sharif University of Technology ; Kianfar, Farhad (Supervisor)
Abstract
In the proposed model, it is attempted to obtain the optimum cost of activities concerning their relevant risks. I n doing so, the concept of risk based project value (RPV) has been employed to measure the expected earn of each individual activity in the presence of risks. Generally, in the model, the risks are divided into critical and non-critical risks. Critical risks cause termination of activities and non-critical risks that are not as severe as critical risks and lead to monetary lost. In the next step, the risk response plans are utilized to reduce the possible adverse effects of risks. These plans, also known as action plans, are the preventive or adaptive actions that aim to reduce...