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seidy-esfahlan--mina
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Core-Scale Modeling and Experimental Study of Surfactant Flooding due to Enhanced Oil Recovery in Carbonate Rocks
, M.Sc. Thesis Sharif University of Technology ; Ghazanfari, Mohammad Hossein (Supervisor) ; Jamshidi, Saeed (Co-Advisor)
Abstract
Chemical flooding such as surfactant flooding in oil reservoirs can change the wettability and interfacial tension between oil and water and so reduce the residual oil saturation in the reservoir. Some of these materials can be adsorbed a lot on the surface of carbonate rocks, so it is difficult to predict the oil recovery factor in such process. Therefore it is necessary to survey the adsorption amount of surfactants in chemical EOR injections.In this thesis, the adsorption of a nonionic surfactant on the surface of carbonate rock is experimented and the proper model is obtained. Then the surfactant is injected in a core saturated with oil to observe the efficiency of this surfactant in...
Layer Production of Orthosis in Cloud Manufacturing Environment: Focusing on Boston Brace
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
The purpose of this research is to optimize the design and manufacture of medical orthoses. In this regard, the business model canvas was used in order to define a general framework for the orthosis system in the cloud. In the cloud, patients are provided with services such as personalized orthoses with lower cost and high speed of sending orthoses (while not having to go back to the lab), as well as providing service for doctors such as information sourcing and full expectations of treatment plan and representing cost effectiveness for laboratory. These values were determined through the business model canvas in the value proposition section. Other important services and requirements in...
A Knowledge Oriented Framework to Enable New Service Development Using Axiomatic Design Theory: Focusing on Hotel Business Models
, M.Sc. Thesis Sharif University of Technology ; Fattahi Valilai, Omid (Supervisor)
Abstract
In this research, the concept of new service development for Hotel industry is considered. As the concept of new service development encounters both business model structures and the required analysis for validation, the thesis has used the axiomatic design theory to evaluate the required service elements. Axiomatic Design framework as a scientific base for every type of design consists of 4 domains. The first domain named customer domain is the starting point at this research. In order to be prepared for applying in a real case study, customer domain is investigated and analyzed through a business model Canvas with nine building blocks covering all necessary and effective domains in a...
Green supply chain network design considering inventory-location-routing problem: A fuzzy solution approach
, Article International Journal of Logistics Systems and Management ; Volume 35, Issue 4 , 2020 , Pages 436-452 ; Ashoftehfard, A ; Mina, H ; Sharif University of Technology
Inderscience Publishers
2020
Abstract
The growing rate of population and technological advancement have led to an increase in natural resource consumption, which has caused irreparable damage to the environment. The implementation of green supply chain management is one of the most effective ways to deal with environmental degradation. Therefore, in this paper, a bi-objective mixed integer linear programming model is developed to design a green supply chain network. In the proposed model, the possibility of customer storage, being faced with shortage, locating of distribution centres, green vehicle routing problem, split delivery, multi-depot vehicle routing problem (VRP), capacitated VRP, and uncertainty in demands will be...
A dynamic decision support system for sustainable supplier selection in circular economy
, Article Sustainable Production and Consumption ; Volume 27 , 2021 , Pages 905-920 ; 23525509 (ISSN) ; Tavana, M ; Mina, H ; Sharif University of Technology
Elsevier B.V
2021
Abstract
Supplier selection is an important and challenging problem in sustainable supply chain management. We propose a dynamic decision support system (DSS) for sustainable supplier selection in circular supply chains. Unlike the linear take-make-waste-dispose production systems, circular supply chains are nonlinear make-waste-recycle production systems with zero-waste vision. The proposed DSS allows users to customize and weight their economic, social, and circular criteria with a fuzzy best-worst method (BWM) and select the most suitable supplier with the fuzzy inference system (FIS). Machine learning is used to maintain and synthesize the criteria scores for the suppliers after each supplier...
A dynamic decision support system for sustainable supplier selection in circular economy
, Article Sustainable Production and Consumption ; Volume 27 , 2021 , Pages 905-920 ; 23525509 (ISSN) ; Tavana, M ; Mina, H ; Sharif University of Technology
Elsevier B.V
2021
Abstract
Supplier selection is an important and challenging problem in sustainable supply chain management. We propose a dynamic decision support system (DSS) for sustainable supplier selection in circular supply chains. Unlike the linear take-make-waste-dispose production systems, circular supply chains are nonlinear make-waste-recycle production systems with zero-waste vision. The proposed DSS allows users to customize and weight their economic, social, and circular criteria with a fuzzy best-worst method (BWM) and select the most suitable supplier with the fuzzy inference system (FIS). Machine learning is used to maintain and synthesize the criteria scores for the suppliers after each supplier...
All-Carbon negative differential resistance nanodevice using a single flake of nanoporous graphene
, Article ACS Applied Electronic Materials ; Volume 3, Issue 8 , 2021 , Pages 3418-3427 ; 26376113 (ISSN) ; Akhavan, O ; Shayesteh Zeraati, A ; Sattari Esfahlan, S. M ; Sharif University of Technology
American Chemical Society
2021
Abstract
A temperature-induced degenerate p-type graphene nanopore/reduced graphene oxide (GNP/rGO) heterojunction-based nanodevice was prepared and studied for the first time, showing a robust negative differential resistance (NDR) feature. In this regard, cellulose-based perforated graphene foams (PGFs), containing numerous nanopores (with an average size of ∼2 nm surrounded by nearly six-layer rGO walls) were synthesized using bagasse as a green starting material. The PGFs with an essential p-type semiconducting property showed a band gap energy of ∼1.8 eV. The observed two-terminal NDR peak could present stable and reversible features at high temperatures of 586-592 K. It was demonstrated that...
A fuzzy solution approach to supplier selection and order allocation in green supply chain considering the location-routing problem
, Article Scientia Iranica ; Volume 28, Issue 1 E , 2021 , Pages 446-464 ; 10263098 (ISSN) ; Haji, A ; Mina, H ; Sharif University of Technology
Sharif University of Technology
2021
Abstract
In the eld of supply chain, selecting a suitable green supplier could signi cantly help us decrease the cost and risks of the operations and increase the quality of green supply. This paper develops an integrated two-stage approach based on Fuzzy Analytic Hierarchy Process (FAHP) and multi-objective mixed-integer linear programming to select suppliers and allocate order in the green supply chain. In the rst stage, suppliers are evaluated using FAHP method and in the second stage, a multi-product multi-period supply chain is developed considering green location-routing problem, discounting, and time window under uncertainty. Then, a fuzzy solution approach is applied to solve the proposed...
Using Supported Ionic Liquid Membranes (SILMs) for Selective Separation of CO2/CH4
, M.Sc. Thesis Sharif University of Technology ; Rashtchian ,Davood (Supervisor) ; Adibi, Mina (Supervisor)
Abstract
Supported Ionic Liquid Membranes (SILMs) are fabricated by saturating the pores of a porous support with ionic liquids. To assess the performance of SILMS, it is necessary to obtain data about the properties of ionic liquids such as diffusivity, solubility, and etc. To accomplish this task, in this project the permeability and diffusivity of CO2 and CH4 through three immidazolium-based ionic liquids: [bmim][PF6], [hmim][Tf2N], and "1-methyl-3-(3- tri methoxi silil propyl) imidazolium bis (tri fluoro methyl solphonyl)" , in the temperature range between 27-45 ℃ and pressures within 10-50 kPa, are measured. It is shown in data validation section that the results of this study are in good...
Optimization of Production of Biodiesel
,
M.Sc. Thesis
Sharif University of Technology
;
Rashtchian, Davood
(Supervisor)
;
Adibi, Mina
(Supervisor)
Abstract
Reduction in the oil reserves level and the increasing of fossil fuel prices and GHG has led to growing value of attention to biodiesel. Reserves of fossil fuels are running out and should have proper alternative for them. Environmental benign and renewable properties of biodiesel make it consider suitable candidate to replace fossil fuels.
In this study, continuous production of biodiesel and optimization of important and influential parameters have been investigated. The method is concluded of trans esterification of soya oil with methanol as feed in presence of homogeneous catalyst of NaOH. The reactor was simple with high efficiency and low operational and investment cost. The...
In this study, continuous production of biodiesel and optimization of important and influential parameters have been investigated. The method is concluded of trans esterification of soya oil with methanol as feed in presence of homogeneous catalyst of NaOH. The reactor was simple with high efficiency and low operational and investment cost. The...
The Study of Antioxidant Mechanism of some Flavonoids without and in Presence of Cyclodextrins: Theoretical Point of View
, Ph.D. Dissertation Sharif University of Technology ; Tafazzoli, Mohsen (Supervisor) ; Ghiasi, Mina (Co-Supervisor)
Abstract
Antioxidants are compounds with anti-cancer, anti-bacterial, anti-viral, anti-aging and anti-allergic properties. In the present study, a quantum mechanical approach has been used to shed light on the presence effect of glycoside group on the antioxidant ability of chrysin as one of the most important consumable flavonoids and two glycoside derivatives, chrysin-6-C-fucopyranoside and chrysin-3-malonyl-6-C-fucopyranoside which has electron-withdrawing group (EWG) in its C3 of glycoside group. Density functional theory (DFT) using B3LYP and UB3LYP functional and split-valance 6-311++G ** basis set were used to optimize chrysin, its different derivatives, and their radicals. Analysis of...
Process Design of Ionic Liquid-Based CO2 Capture with Consideration of Economic and Environmental Issues
, M.Sc. Thesis Sharif University of Technology ; Rashtchian, Davood (Supervisor) ; Adibi, Mina (Co-Supervisor)
Abstract
Concerns have increased about global warming caused by CO2 emissions in the atmosphere. At the moment, carbon capture and storage is the best available solution. Among the current technologies for CCS, amine-based chemical absorption appears to be the most common method. Amines show several inherent drawbacks such as high vapor pressure, high energy consumption in regeneration, corrosivity and degradability. So, researchers have developed new solvents with the foresight of being superior to amines. Ionic liquids (ILs) are among the most suitable alternatives. The most prominent feature of ILs is their tunable thermophysical properties. In this work, physical absorption by ILs is chosen as...
A green closed-loop supply chain network: A bi-objective mixed integer linear programming model
, Article International Journal of Operational Research ; Volume 41, Issue 4 , 2021 , Pages 492-513 ; 17457645 (ISSN) ; Salehian, F ; Lamouchi, H ; Mina, H ; Sharif University of Technology
Inderscience Publishers
2021
Abstract
The increasing level of customer awareness and application of environmental laws by governments, on the one hand, and the increasing number of competitors, on the other hand, has obliged industry owners to include green activities in the design of the supply chain network. Green activities include any type of action that reduces environmental degradation. Hence, this study seeks to develop a bi-objective, mixed integer linear programming (MILP) model for designing a green supply chain network. In the proposed model, the minimisation of costs and detrimental environmental effects are discussed. LP metric method is used to solve the bi-objective model and the proposed model is run by using...
Automated Code Reviewer Recommendation for Pull Requests
, M.Sc. Thesis Sharif University of Technology ; Heydarnoori, Abbas (Supervisor)
Abstract
Nowadays, by distributed software development growth based on pull-requests, it is possible to review code changes before integrating into the master program by a third-party, informally and tool-based which is called Modern Code Review (MCR). Effectively performing MCR can facilitate the software evolution phase through reducing post-release defects. In MCR, after sending the pull request, the developer invites appropriate reviewers to inspect his code. Due to the high volume of requests and potential reviewers in many projects, selecting the appropriate reviewer is difficult and time consuming. Previously, a variety of recommender systems have been proposed that use methods based on...
A novel fuzzy multi-objective circular supplier selection and order allocation model for sustainable closed-loop supply chains
, Article Journal of Cleaner Production ; 10 March , 2020 ; Tavana, M ; Alavi, B ; Mina, H ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
Maximizing the value of resources and producing less waste are strategic decisions affecting sustainability and competitive advantage. Sustainable closed-loop supply chains (CLSCs) are designed to minimize waste by circling back (repairing, reselling, or dismantling for parts) previously discarded products into the value chain. This study presents a novel two-stage fuzzy supplier selection and order allocation model in a CLSC. In Stage 1, we use the fuzzy best-worst method (BWM) to select the most suitable suppliers according to economic, environmental, social, and circular criteria. In Stage 2, we use a multi-objective mixed-integer linear programming (MOMILP) model to design a...
Studying the Effect of Motor Learning on Muscle Synergies During Balance
, M.Sc. Thesis Sharif University of Technology ; Farahmand, Farzam (Supervisor) ; Baniasad, Mina (Co-Supervisor)
Abstract
Our body makes use of many degrees of freedom in muscle space. As a result, there are many solutions for activating muscles when performing a specific task. “how our central nervous system (CNS) controls abundant degrees of freedom?” has been a popular question for researchers in the field of motor control since Bernstein. The existence of muscle synergies is one of the proposed hypothesis, and there is experimental evidence that they are encoded in our CNS as building blocks. The aim of this study is to study the effect of training on the number, structures, and activation profiles of muscle synergies that are used for maintaining balance. For this purpose, electromyography data from 28...
Medical waste management during coronavirus disease 2019 (COVID-19) outbreak: A mathematical programming model
, Article Computers and Industrial Engineering ; Volume 162 , December , 2021 ; 03608352 (ISSN) ; Khalili Nasr, A ; Mostafazadeh, P ; Mina, H ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Municipal solid waste (MSW) directly impacts community health and environmental degradation; therefore, the management of MSW is crucial. Medical waste is a specific type of MSW which is generally divided into two categories: infectious and non-infectious. Wastes generated by coronavirus disease 2019 (COVID-19) are classified among infectious medical wastes; moreover, these wastes are hazardous because they threaten the environment and living organisms if they are not appropriately managed. This paper develops a bi-objective mixed-integer linear programming model for medical waste management during the COVID-19 outbreak. The proposed model minimizes the total costs and risks, simultaneously,...
Studying the Effect of Motor Learning on Joint Motion Coordination during Balance Control
, M.Sc. Thesis Sharif University of Technology ; Farahmand, Farzam (Supervisor) ; Baniasad, Mina (Co-Supervisor)
Abstract
The problem of degrees of freedom states that there are several ways to take advantage of the multiple joints of the body to perform a motor skill. This issue was first raised by Nikolai Bernstein. In previous studies on the Bernstein hypothesis, movement coordination has often been evaluated by calculating variance changes in joint movements and using statistical indicators, and synergy analysis has not been used.In this study, the effect of exercise on balance skills in healthy individuals was investigated using synergy analysis. For this purpose, movement data of 8 healthy individuals were recorded in two sessions before and after exercise while maintaining their balance on the balance...
A novel fuzzy multi-objective circular supplier selection and order allocation model for sustainable closed-loop supply chains
, Article Journal of Cleaner Production ; Volume 287 , 2021 ; 09596526 (ISSN) ; Tavana, M ; Alavi, B ; Mina, H ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Maximizing the value of resources and producing less waste are strategic decisions affecting sustainability and competitive advantage. Sustainable closed-loop supply chains (CLSCs) are designed to minimize waste by circling back (repairing, reselling, or dismantling for parts) previously discarded products into the value chain. This study presents a novel two-stage fuzzy supplier selection and order allocation model in a CLSC. In Stage 1, we use the fuzzy best-worst method (BWM) to select the most suitable suppliers according to economic, environmental, social, and circular criteria. In Stage 2, we use a multi-objective mixed-integer linear programming (MOMILP) model to design a...
A private sustainable partner selection model for green public-private partnerships and regional economic development
, Article Socio-Economic Planning Sciences ; Volume 83 , 2022 ; 00380121 (ISSN) ; Khalili Nasr, A ; Mina, H ; Michnik, J ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Many cities are struggling to keep pace with limited budgets and rapid growth. Economic development models involving public-private partnerships (P3s) can help drive economic revitalization. The choice of partners plays a vital role in the success or failure of sustainable P3 initiatives. In this study, we propose a novel integrated sustainable private partner selection framework in P3s. The proposed model is composed of the best-worst method (BWM), the weighted influence non-linear gauge system (WINGS), and the technique of order preference similarity to the ideal solution (TOPSIS). The BWM is used to identify the importance weights of the economic, environmental, social, and technological...