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    Dosimetric evaluation of a newly developed radiochromic film for radiation processing

    , Article Iranian Journal of Science and Technology, Transaction A: Science ; Volume 31, Issue 4 , 2007 , Pages 397-401 ; 10286276 (ISSN) Akhavan, A ; Sohrabpour, M ; Sharifzadeh, M ; Sharif University of Technology
    Shiraz University  2007
    In order to improve the performance of a newly developed radiochromic film, GIC-79, some dosimetric characteristics of this film have been studied based on relevant standard practice. The present study describes some parameters that may affect the dosimeter response before, during, and after irradiation. The effect of absorbed dose rate on dosimeter response was determined by irradiating dosimeters at low absorbed dose rates with gamma rays. Calibration irradiations of dosimeters were performed with both gamma rays and also electrons to determine the effect of large difference absorbed dose rates on dosimeter response. In addition, post irradiation stability was obtained and also the... 

    Multi-objective design and operation of Solid Oxide Fuel Cell (SOFC) Triple Combined-cycle Power Generation systems: Integrating energy efficiency and operational safety

    , Article Applied Energy ; Volume 185 , 2017 , Pages 345-361 ; 03062619 (ISSN) Sharifzadeh, M ; Meghdari, M ; Rashtchian, D ; Sharif University of Technology
    Elsevier Ltd  2017
    Energy efficiency is one of the main pathways for energy security and environmental protection. In fact, the International Energy Agency asserts that without energy efficiency, 70% of targeted emission reductions are not achievable. Despite this clarity, enhancing the energy efficiency introduce significant challenge toward process operation. The reason is that the methods applied for energy-saving pose the process operation at the intersection of safety constraints. The present research aims at uncovering the trade-off between safe operation and energy efficiency; an optimization framework is developed that ensures process safety and simultaneously optimizes energy-efficiency, quantified in... 

    Bi-level planning of distributed energy resources into existing transmission grids: Pathway to sustainable energy systems

    , Article IET Generation, Transmission and Distribution ; Volume 16, Issue 24 , 2022 , Pages 4963-4979 ; 17518687 (ISSN) Ranjbar, H ; Saber, H ; Sharifzadeh, M ; Sharif University of Technology
    John Wiley and Sons Inc  2022
    This paper presents a novel stochastic planning framework for the integration of renewable distributed energy resources (DERs) into existing power systems without relying on new investments in the transmission networks. The upper-level problem of the proposed model aims at minimizing the total expected social cost of supplying demand that includes the expected cost of getting energy from conventional generating units and DERs, the congestion cost of transmission networks, and the greenhouse gas (GHG) emission cost, while each of the privately invested DER satisfies a specified rate of return. The lower-level problem clears the electricity market to find locational marginal prices (LMPs) and... 

    Adsorption behavior of a Gd-Based metal-organic framework toward the quercetin drug: effect of the activation condition

    , Article ACS Omega ; Volume 7, Issue 45 , 2022 , Pages 41177-41188 ; 24701343 (ISSN) Tajahmadi, S ; Shamloo, A ; Shojaei, A ; Sharifzadeh, M ; Sharif University of Technology
    American Chemical Society  2022
    A carboxylate gadolinium-based metal-organic framework (Gd-MOF) is an exceptional candidate for magnetic resonance imaging agents, but its low drug adsorption capacity hinders this MOF from being used as a theragnostic agent. In this work, the Gd-MOF was synthesized by a simple solvothermal method. Then, different activation situations, including various solvents over different time periods, were applied to enhance the specific surface area of the synthesized MOF. Different characterization analyses such as X-ray diffraction and Brunauer-Emmett-Teller along with experimental quercetin adsorption tests were done to study the crystalline and physical properties of various activated MOFs. In... 

    Inherently safe and economically optimal design using multi-objective optimization: The case of a refrigeration cycle

    , Article Process Safety and Environmental Protection ; Volume 104 , 2016 , Pages 254-267 ; 09575820 (ISSN) Eini, S ; Shahhosseini, H. R ; Javidi, M ; Sharifzadeh, M ; Rashtchian, D ; Sharif University of Technology
    Institution of Chemical Engineers  2016
    The economic viability of industrial processes strongly depends on their safe and reliable operation. The method of inherent safe process design enables systematic consideration of safety measures in order to ensure process safe operation at the early stages of process design. The challenge is that the economic measures that are often considered for the design of industrial processes are often incommensurable with the safety measures. In the present research, a novel framework is proposed in which the safety criteria are quantified based on consequence modeling and aggregated with the economic performance using multi-objective optimization programming. The developed methodology was applied... 

    Developing group contribution models for the estimation of Atmospheric Lifetime and Minimum Ignition Energy

    , Article Chemical Engineering Science ; Volume 226 , 2020 Eini, S ; Jhamb, S ; Sharifzadeh, M ; Rashtchian, D ; Kontogeorgis, G. M ; Sharif University of Technology
    Elsevier Ltd  2020
    The Atmospheric Lifetime (ALT) of a compound represents the potential for the atmospheric accumulation of chemicals. Chemicals with a long lifetime are more resistant to natural decomposition and remain in the environment for a longer period. Minimum Ignition Energy (MIE) is one of the most important properties when evaluating hazardous chemicals. Despite the significance of these environment and safety-related properties, currently, there are no group contribution (GC) models that enable their predictive modeling. The present research aims at filling this gap. To this end, experimental data were collected from literature and the GC model parameters were estimated using the weighted... 

    Energy induced separation network synthesis of an olefin compression section: A case study

    , Article Industrial and Engineering Chemistry Research ; Volume 50, Issue 3 , December , 2011 , Pages 1610-1623 ; 08885885 (ISSN) Sharifzadeh, M ; Rashtchian, D ; Pishvaie, M. R ; Thornhill, N. F ; Sharif University of Technology
    When latent heat is transferred in a heat exchanger network, the formation of the second phase creates an opportunity for separation. This network is known as a Heat Induced Separation Network (HISEN). HISENs have been extended to include pressure adjusting devices for improving the thermodynamic feasibility of the network. This extended network is termed an Energy Induced Separation Network (EISEN). Most examples of EISENs in the literature are environmental pollution treatment case studies which do not require liquid phase mass integration or shaft power integration. They assume a predetermined extent of separation and mostly are based on conceptual methods of design. This paper explains... 

    Studying the Problems Related to Latin Bitrades and 2-Simultaneous Coloring

    , M.Sc. Thesis Sharif University of Technology Sharifzadeh, Maryam (Author) ; Mahmoodian, Ebadollah (Supervisor)
    In the year 1997, at 16th British Combinatorial Conference Cameron introduced a new concept called 2-simultaneous coloring. He used this concept to reformulate a conjecture of Keedwell on the existence of critical partial Latin squares of a given type. After that, other people studied special cases of this conjecture. They also studied the relation between this conjecture and other well-known conjectures in Combinatorics, such as Cycle Double Cover Conjecture (CDC). Finally, in 2004 the general case of this conjecture was proven. In first two sections, in addition to defining some fundamental concepts, we represent the relation between Latin trade and 2-simultaneous coloring. Afterwards, by... 

    , M.Sc. Thesis Sharif University of Technology Sharifzadeh, Abdorrahman (Author) ; Behnia, Fereidoon (Supervisor)
    In this thesis, Particle Filter Methods are investigated in the context of moving targets tracking and the associated performance analysis. The application scope of this algorithm which is a particular case of Sequential Monte Carlo Method is far broader than tracking of moving targets. This algorithm can be used for mathematical calculations such as estimation of mathematical expectations, integrals, surface area of curves and many other mathematical calculations. In addition, it has applications in other branches of science like genetics. This algorithm is based on random sampling of a probability density function and resampling from the extracted samples. We change this algorithm in... 

    Design of peptide-based inhibitor agent against amyloid-β aggregation: Molecular docking, synthesis and in vitro evaluation

    , Article Bioorganic Chemistry ; Volume 102 , September , 2020 Jokar, S ; Erfani, M ; Bavi, O ; Khazaei, S ; Sharifzadeh, M ; Hajiramezanali, M ; Beiki, D ; Shamloo, A ; Sharif University of Technology
    Academic Press Inc  2020
    Formation of the amyloid beta (Aβ) peptide aggregations represents an indispensable role in appearing and progression of Alzheimer disease. β-sheet breaker peptides can be designed and modified with different amino acids in order to improve biological properties and binding affinity to the amyloid beta peptide. In the present study, three peptide sequences were designed based on the hopeful results of LIAIMA peptide and molecular docking studies were carried out onto the monomer and fibril structure of amyloid beta peptide using AutoDock Vina software. According to the obtained interactions and binding energy from docking, the best-designed peptide (D-GABA-FPLIAIMA) was chosen and... 

    Quantification of technological progress in greenhouse gas (GHG) capture and mitigation using patent data

    , Article Energy and Environmental Science ; Volume 12, Issue 9 , 2019 , Pages 2789-2805 ; 17545692 (ISSN) Sharifzadeh, M ; Triulzi, G ; Magee, C. L ; Sharif University of Technology
    Royal Society of Chemistry  2019
    Greenhouse gas emissions from anthropogenic sources are believed to be the main cause of global warming and climate change. Furthermore, fossil fuels are forecasted to remain the dominant source of energy in the near future. Therefore, capture and sequestration of greenhouse gases and in particular carbon dioxide is likely to be a major pathway toward environmental protection and energy sustainability. Such clarity has stimulated an intense and diverse range of research into various capture and mitigation technologies, which race with global warming in real-time. Quantification of the performance improvement rates of these technologies can inform decision-makers' long-term investment... 

    An Empirical Exploration of Social-business Tensions, and their Implications for its Sustainability: An Empirical Study from the Emerging Market of Iran

    , M.Sc. Thesis Sharif University of Technology Sharifzadeh Asli, Maryam (Author) ; Tasavori, Misagh (Supervisor)
    Social business is a type of business whose first priority is to influence and solve a social problem, and unlike commercial businesses, the second priority is to maximize profits. This type of business sees earning money as a means to sustain itself and increase social impact. According to this definition, the mission of social businesses has a dual nature that these businesses are trying to achieve a balanced balance between both social and economic aspects of their mission. Leading research seeks to focus on social businesses within Iran to address how these businesses manage the tensions that arise from their dual mission. This research has tried to use the communication network approach... 

    Integrated Safe Design of Industrial Processes under Uncertainty

    , M.Sc. Thesis Sharif University of Technology Meghdari, Mojtaba (Author) ; Rashtchian, Davood (Supervisor) ; Sharifzadeh, Monireh (Supervisor)
    Chemical industries are associated with hazardous chemicals and extreme operating conditions. Unsafe events can incur dramatic costs in terms of the loss of life, financial penalties and damages to the environment. Therefore, design of industrial processes which can be operated safely over a wide range of operating conditions is vital. Nevertheless, operation of industrial processes is a strong function of their design. If the process is initially poorly designed, ensuring its safe operation, if not impossible, would require costly modifications at the operational phases. This observation is due to the fact that process design decisions (e.g. design of process equipment) often have a... 

    Economically Optimal and Inherently Safe Design and Operation of Microreactor for Hydrogen Production in Portable Power Generation Devices Such as PEM Fuel Cell

    , M.Sc. Thesis Sharif University of Technology Ghodba, Ali (Author) ; Rashtchian, Davood (Supervisor) ; Sharifzadeh, Mehdi (Supervisor)
    Due to high efficiency and modular production ability of fuel cells, they have been used extensively in the power plants, especially in portable devices such as fuel cell vehicles. The commercialization of the equipment is dependent on ensuring the safety of their operations. Many of these platforms employ steam reforming reactions at very high temperature in order to produce the hydrogen, which is implemented as the fuel in the PEM fuel cell. The technique of miniaturization is a promising approach to design a chemical process in which the rate of transport phenomena such as the mass and heat transfer are intensified by reducing the size of the reactor and allowing the process to be run... 

    Optimal Grid Expansion Planning of Iran’s Interconnected Water-Energy Networks with Renewable Energy Technologies Using a Mixed-Integer Linear Programming (MILP) Approach

    , M.Sc. Thesis Sharif University of Technology Pooladsanj, Milad (Author) ; Nobakhti, Amin (Supervisor) ; Sharifzadeh, Mahdi (Supervisor)
    Energy and water are valuable resources that underpin human prosperity and are to a large extent, interdependent. Water is used in multiple phases of energy production and electricity generation, from fossil-fuel extraction, transport and processing,irrigating crops for biofuels, to providing cooling water for thermoelectric power plants. On the other hand, all such processes, alongside with other industrial and municipal water uses, require sufficient energy required to extract, treat, and deliver water.The key objective of this project is to maximize both water and energy economic potentials while considering the environmental impacts associated with their consumption. In this regard,... 

    Integrated and Multi-Scale Design of the Value Chain of Liquefied Natural Gas (Lng) Production from Associated Gas Considering Economic, Safety, and Environmental Objectives

    , Ph.D. Dissertation Sharif University of Technology Eini, Saeed (Author) ; Davood Rashtchian (Supervisor) ; Mahdi Sharifzadeh (Co-Supervisor)
    Natural gas liquefaction is an enabling technology which could make natural gas resources globally accessible. Nonetheless, the design and operation of LNG processes is highly complex, and is subject to multiple criteria including energetic, environmental and safety performance. Moreover, such processes must be flexible enough to operate under different feed conditions. The present research applies integrated process and product design framework to enhance simultaneously energy efficiency, environmental benignness, and inherent safety of a small-scale LNG process. The challenge is that the current group contribution methods applied for the estimation of the thermophysical properties, suffer... 

    Monitoring of Petrochemical Refinary Process

    , M.Sc. Thesis Sharif University of Technology Saeedi, Majid (Author) ; Rashtchian, Davoud (Supervisor) ; Sharifzadeh, Mahdi (Supervisor)
    Due to the replacement of fossil fuel with cleaner products, the reduction of fuel consumption in transportation until 2045, the excessive production of fuel oil in refineries and the growth of feed demand from downstream chemical units, have made countries to upgrade their refineries or construct Petro-refineries. The Petro-refinery is a new generation of refinery and its main purpose is to supply chemicals to downstream units. The products of these units will have more valuable than fuel refineries. Steam cracking unit, aromatic unit and propane dehydrogenation unit are important units that are in Petro-refineries. In this research, all refinery units were technically and economically... 

    Estimation of Genetically Significant Dose to the Iranian Population from Diagnostic Radiology Procedures

    , M.Sc. Thesis Sharif University of Technology Esmati, Ghasem (Author) ; Sohrabpour, Mostafa (Supervisor) ; Sharifzadeh, Monireh (Co-Advisor)
    Genetic significant dose to the Iranian population from diagnostic radiology procedures has been measured. A survey of 26500 radiology patients has radiological tests, age and sex distribution. A second survey has produced the radiological operational parameters, including kV, mAs, FTD, field size, filtration, film number & body orientation. Statistical demographic data have been obtained and from which child expectancy number have been calculated. A Rando phantom has been used for dosimetry phase of the gonad doses using TLD. Combining all of the above data a new GSD of 10.5 mrem/year has been calculated which is 14% higher than the previous number measured in 1980  

    Estimation of trunk muscle forces using a bio-inspired control strategy implemented in a neuro-osteo-ligamentous finite element model of the lumbar spine

    , Article Frontiers in Bioengineering and Biotechnology ; Volume 8 , 2020 Sharifzadeh Kermani, A ; Arjmand, N ; Vossoughi, G ; Shirazi Adl, A ; Patwardhan, A. G ; Parnianpour, M ; Khalaf, K ; Sharif University of Technology
    Frontiers Media S.A  2020
    Low back pain (LBP), the leading cause of disability worldwide, remains one of the most common and challenging problems in occupational musculoskeletal disorders. The effective assessment of LBP injury risk, and the design of appropriate treatment modalities and rehabilitation protocols, require accurate estimation of the mechanical spinal loads during different activities. This study aimed to: (1) develop a novel 2D beam-column finite element control-based model of the lumbar spine and compare its predictions for muscle forces and spinal loads to those resulting from a geometrically matched equilibrium-based model; (2) test, using the foregoing control-based finite element model, the... 

    Simulation, Integration, Optimization of Conversion of Natural Gas to Olefins by Methanol Production Process with ASPEN PLUS and GAMS Softwares

    , M.Sc. Thesis Sharif University of Technology Foroughi Doust, Mohsen (Author) ; Rashtchian, Davoud (Supervisor) ; Sharifzadeh, Mahdi (Supervisor)
    Considering the supply and demand market of natural gas, methanol, propylene and ethylene and the propylene value chain, it is expected that the design of the propylene production process from methanol produced from natural gas and its implementation in Iran country can significantly flourish the production of polypropylene, acrylonitrile and Etc. On the other hand, with the industrialization of this process, the uncontrolled export of methanol from Iran to countries such as China and the devaluation of methanol will be prevented. In this report, the process of producing synthetic gas from natural gas using autothermal reactor and heat exchange reforming, separation and storage of carbon...