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system-approach
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A Novel Framework for Change Management Leadership with Focus on Human Resource (HR) Factors
, M.Sc. Thesis Sharif University of Technology ;
Abstract
The world around us changes almost every second, so the economy in this world feels it more by every single minute. When we look at the organizational structures, they experience lots of things for keeping the companies competitive and the human resources have the main role among the other stimulating factors.The human resource management and its improvements have done a lot in this century to organize and manage the human problems in organizations. After that those companies that had more effective strategies become on top of this important management system. By changing fast the work models companies experience more and immediate changes that may not happen even through the years. In this...
Indigenous Approach to Value Conflicts of Technology: Social Networks as a Case Study
, M.Sc. Thesis Sharif University of Technology ; Taqavi, Mostafa (Supervisor)
Abstract
In this thesis, we will take a more profound study about what technology is and the relationship between technology development and society. We will discuss various theories such as the social construction of technology, the heterogeneous engineerings approach, the system approach, and the co-construction of society and technology. In this way, the relationship between economic and social systems and technological products is explained and based on this, an approach is proposed in relation to the ethical challenges in technology with a focus on social networks. The discussion is about the fact that due to the continuous use of technologies, a challenge may be raised in the technology...
Indigenous Approach to Value Conflicts of Technology: Social Networks as a Case Study
, Ph.D. Dissertation Sharif University of Technology ; Taqavi, Mostafa (Supervisor)
Abstract
In this thesis, we will take a more profound study about what technology is and the relationship between technology development and society. We will discuss various theories such as the social construction of technology, the heterogeneous engineerings approach, the system approach, and the co-construction of society and technology. In this way, the relationship between economic and social systems and technological products is explained and based on this, an approach is proposed in relation to the ethical challenges in technology with a focus on social networks. The discussion is about the fact that due to the continuous use of technologies, a challenge may be raised in the technology...
A Critical Review of the Social Construction of Technology Thesis: Do Society Constructs Technology?
, M.Sc. Thesis Sharif University of Technology ; Taqavi, Mostafa (Supervisor)
Abstract
However “The Social Construction of Technology (SCOT)” is the title of a thesis in the domain of Science and Technology Studies (STS), it has an important effect on the philosophy of technology. In this paper I try to elaborate and criticize SCOT’s approach. For this purpose we need to answer the question “what is Technology exactly?”. So in the first chapter, I defined Technology. After reviewing some of it’s famous definitions, I defined the joint of technologies based on the “Dual nature of technical artefacts” thesis. Because of the wide range of technologies, I have concentrated on “Technical Artefacts”, although I was not inattentive to other meanings of technology, especially...
Proposing a Method for Forecasting Interrupted Time Series based on Fuzzy Logic: a System Dynamics Approach
, M.Sc. Thesis Sharif University of Technology ; Khedmati, Majid (Supervisor)
Abstract
Performing analysis and forecasting is crucial. Better forecasting will lead to better decisions. One method for predicting the future is time series analysis. In reality, it is common for an intervention to occur and alter the characteristics of a time series. In recent years, interrupted time series analysis has been receiving a lot of attention. A new forecasting method for interrupted time series has been developed in this study. This is a system dynamics-based approach. At every stage of the approach, system thinking is incorporated. In order to model the effects of a given intervention, common modes of behavior in dynamic systems are used. Furthermore, control theory has been used to...
Modeling a Healthcare System Using Simulation-based Queuing Theory
, M.Sc. Thesis Sharif University of Technology ; Eshraghniaye Jahromi, Abdolhamid (Supervisor)
Abstract
Healthcare industry, in terms of gross national product, is one of the largest and fastest growing sectors of almost all countries. It is not surprising that a large amount of research has been focused on advancing medical practices and improving management methods in healthcare systems. One of the most important areas for improvement is patient flow management. Patient flow indicates the capability of a health care system in providing fast, reliable, and efficient services. Although capacity of health care system has grown, patients still have been facing long delays before getting into the system due to ineffective management. Queuing models can offer appropriate methods for analyzing and...
Synthetic Model Based in Viable System Model and System Dynamics for Analysis and Design of Systems
, M.Sc. Thesis Sharif University of Technology ; Shadrokh, Shahram (Supervisor)
Abstract
This is common for organizations to don't move in their specified mission statement direction, because of pressures for saving themselves in reaction to environment changes. This problem can be addressed as conflict between survival and identity. In this thesis we approach this problem by synthesizing "Viable System Model" and "System Dynamics". Basic of this model shaped on viable system model structure and system dynamics modeling. In literature there is only two such models. But they are not detailed enough for providing mathematical analysis. In this research, law of requisite variety (one of the key principles in cybernetics) has been quantified. In this synthetic model, appropriate...
Study, Analysis & Optimizing The Process Of Approval, Design & Implementation Of Projects In The Iranian Oil Terminal Company(IOTC)
, M.Sc. Thesis Sharif University of Technology ; Mostafavi, Mostafa (Supervisor)
Abstract
Since the Iranian oil terminals company(I.O.T.C.) has been the main and strategic gateway of exporting petroleum in the country and plays an important role in the optimum continuity of national, regional and international energy supply chain and also conducting the needed projects whit a desirable quality and minimum time and cost has a prominent influence on steady continuity of manufacturing, importing and exporting of petroleum and gas production. The main purpose of doing this thesis is diagnosing the process of approval, design and implementation of projects in the I.O.T.C., Thus, whit regarding to the modern needs of implementing projects and the necessity of reviewing the structure...
Stabilizing fractional-order PI and PD controllers: An integer-order implemented system approach
, Article Proceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering ; Volume 224, Issue 8 , 2010 , Pages 893-903 ; 09596518 (ISSN) ; Tavazoei, M. S ; Sharif University of Technology
2010
Abstract
This paper proposes a scheme for computing the stable regions from which the parameters of fractional-order proportional-integral (PI) and proportional-derivative (PD) controllers can be selected. In particular, a previously investigated method for plotting the stability regions of PI λ and PDμ controllers is extended to their integer-order approximations. Next, the two stability regions are compared and their overlapping sections, referred to as the implementable stability region, are derived. In order for the final closed-loop system to be stable, the designer must choose the controller parameters from the overlapping section of the two stability regions. Simulation results for two example...
Pre-mission activities for the space higher education
, Article 61st International Astronautical Congress 2010, IAC 2010, 27 September 2010 through 1 October 2010, Prague ; Volume 3 , 2010 , Pages 2360-2366 ; 9781617823688 (ISBN) ; Malaek, M. B ; Jazebizadeh, H ; Sharif University of Technology
2010
Abstract
Based on general "System Theory", a system when it comes to its intended operational life; must exhibits three distinguished phases of (1) Pre-mission, (2) Mission, and (3) Post-mission. During Pre-mission one evaluates the system elements readiness to conduct the mission; their proper configurations in addition to their support roles to conduct their organizational role. During Post-mission, we check whether our evaluations were in fact, correct to the levels expected. Both pre and post mission phases are necessary for a successful mission. An education system; especially designed for space applications which aims to deliver the necessary workforce for the relevant industries and other...
Rational approximations in the simulation and implementation of fractional-order dynamics: A descriptor system approach
, Article Automatica ; Volume 46, Issue 1 , 2010 , Pages 94-100 ; 00051098 (ISSN) ; Haeri, M ; Sharif University of Technology
2010
Abstract
This paper deals with issues related to the use of rational approximations in the simulation of fractional-order systems and practical implementations of fractional-order dynamics and controllers. Based on the mathematical formulation of the problem, a descriptor model is found to describe the rational approximating model. This model is analyzed and compared with the original fractional-order system under the aspects which are important in their simulation and implementation. From the results achieved, one can determine in what applications the use of rational approximations would be unproblematic and in what applications it would lead to fallacious results. In order to clarify this point,...
Feature selection and intrusion detection in cloud environment based on machine learning algorithms
, Article Proceedings - 15th IEEE International Symposium on Parallel and Distributed Processing with Applications and 16th IEEE International Conference on Ubiquitous Computing and Communications, ISPA/IUCC 2017 ; 25 May , 2018 , Pages 1417-1421 ; 9781538637906 (ISBN) ; Kazemi Abharian, S ; Wang, G ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2018
Abstract
Characteristics and way of behavior of attacks and infiltrators on computer networks are usually very difficult and need an expert. In addition; the advancement of computer networks, the number of attacks and infiltrations is also increasing. In fact, the knowledge coming from expert will lose its value over time and must be updated and made available to the system and this makes the need for expert person always felt. In machine learning techniques, knowledge is extracted from the data itself which has diminished the role of the expert. Various methods used to detect intrusions, such as statistical models, safe system approach, neural networks, etc., all weaken the fact that it uses all the...
E-policy making: A system approach based on evaluting ICT's impacts
, Article 2006 IEEE International Conference on Service Operations and Logistics, and Informatics, SOLI 2006, Shanghai, 21 June 2006 through 23 June 2006 ; 2006 , Pages 34-39 ; 1424403189 (ISBN); 9781424403189 (ISBN) ; Elahi, S ; Ghasemzadeh, F ; Sharif University of Technology
2006
Abstract
Information and Communication Technologies (ICTs) are now widely accepted by developing countries as a critical tool in their efforts, so policy makers should develop ICT policies or e-policies in order to monitor and evaluate political, socio-economic and cultural impacts of ICT and also measure progress in the use of ICTs to achieve the development strategies and policies. The paper focuses on the ICT's impacts as an important part in developing e-policies, including a comprehensive model based on system approach, appropriate frameworks for determining affecting and affected elements of ICT and a conceptual framework for analyzing and prioritizing different dimensions of the society. The...
A hybrid systems approach to determine effective factors on the growth of marine industries in developing countries
, Article International Journal of Business and Systems Research ; Volume 15, Issue 1 , 2021 , Pages 124-142 ; 1751200X (ISSN) ; Hosseini, S. H ; Aghaei, S. A ; Seif, M. S ; Sharif University of Technology
Inderscience Publishers
2021
Abstract
Marine industries have always been provided power and development for countries both militarily and economically. Due to the lack of essential economic, industrial, and technological infrastructure in developing countries, the development of marine industries has been facing serious obstacles. As a developing country, Iran has been tackling similar barriers. This paper aims at developing a conceptual model, to examine this complex problem, using a systems approach by which subsystems and casual loop diagrams have been created. Afterward, DEMATEL technique has been used, revealing the most effective variables. The research can remarkably help practitioners in appropriate recognition and...
Predictive analytics for fault reasoning in gas flow control facility: A hybrid fuzzy theory and expert system approach
, Article Journal of Loss Prevention in the Process Industries ; Volume 77 , 2022 ; 09504230 (ISSN) ; Nourian, R ; Mousavi, S. M ; Seyed Alizadeh, S. M ; Memarpour, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Gas pressure reduction stations are essential in energy distribution networks because even a minor failure of these systems causes disruptive consumer problems. This study aims to introduce and implement a new knowledge-based platform that uses the synthesized expert's opinions to improve gas pressure control facilities. Given the record of failure of gas transmission system components and the data's uncertain nature, a new fuzzy expert system is developed that takes advantage of the object-oriented programming paradigm to analyze failure modes and conditions. The artificial intelligent model is designed in C# programming language, and a user-friendly interface is developed for ease of...