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    Experts against precaution: Analyzing the process of biosafety regulation in Iran

    , Article New Genetics and Society ; Volume 35, Issue 1 , 2016 , Pages 29-48 ; 14636778 (ISSN) Souzanchi Kashani, E ; Millstone, E ; Sharif University of Technology
    Routledge  2016
    Abstract
    The process of preparing and enacting a bio1safety law in Iran lasted more than a decade. This paper examines the process of biosafety policy-making in Iran in relation to the Cartagena Protocol on Biosafety (CPB) and to domestic Iranian factors. While some scholars argued that the CPB would be influential in developing countries, our findings indicate that it was not particularly important in Iranian biosafety legislation. This paper outlines the internal Iranian political processes, which initially envisaged a very precautionary approach, but which concluded with a biosafety law designed to promote the adoption of these technologies. Reference will be made to the changing influence of... 

    Innovation in regulated electricity networks: Incentivising tasks with highly uncertain outcomes

    , Article Competition and Regulation in Network Industries ; Volume 21, Issue 2 , 2020 , Pages 166-192 Poudineh, R ; Peng, D ; Mirnezami, S. R ; Sharif University of Technology
    SAGE Publications Ltd  2020
    Abstract
    Traditional regulatory models of natural monopoly network utilities are designed to incentivise cost-efficiency, subject to the firm achieving a certain level of reliability. With the rise of decarbonisation as a key policy goal, facilitating innovation in electricity networks has become of vital importance. Innovation and cost-efficiency may overlap and exhibit the same risk profile. However, we show that when there is a difference in their risk profile, incentivising these two tasks using the same incentive scheme is ineffective. This means incentive regulations need to be enhanced with additional modules that take into account the level of risk to which companies are exposed to for their... 

    A low loss linear voltage regulator for high voltage dc power supplies based on adjustable inductors

    , Article 11th Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2020, 4 February 2020 through 6 February 2020 ; 2020 Osanlo, M ; Pouresmaeil, K ; Kaboli, S ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2020
    Abstract
    High voltage power supplies are widely used in telecommunication systems. To better utilize these power supplies, voltage should be stabilized at a certain level. In this application, in case of changing voltage, the desired output parameters will change, such as RF output power quality. Various methods have been proposed to stabilize the voltage at acceptable levels. One of the most commonly used methods is use of switching regulators that are considered for high efficiency in comparison with linear regulators. But the use of these regulators also has problems. One of these problems is electromagnetic interference which is very important in telecommunication systems. Therefore, the need for... 

    On the temperature control in self-controlling hyperthermia therapy

    , Article Journal of Magnetism and Magnetic Materials ; Volume 416 , 2016 , Pages 134-140 ; 03048853 (ISSN) Ebrahimi, M ; Sharif University of Technology
    Elsevier 
    Abstract
    In self-controlling hyperthermia therapy, once the desired temperature is reached, the heat generation ceases and overheating is prevented. In order to design a system that generates sufficient heat without thermal ablation of surrounding healthy tissue, a good understanding of temperature distribution and its change with time is imperative. This study is conducted to extend our understanding about the heat generation and transfer, temperature distribution and temperature rise pattern in the tumor and surrounding tissue during self-controlling magnetic hyperthermia. A model consisting of two concentric spheres that represents the tumor and its surrounding tissue is considered and temperature... 

    Development of H ∞ -Robust control strategy for drying process in fluidized food bed dryers

    , Article Iranian Journal of Science and Technology - Transactions of Mechanical Engineering ; Volume 43, Issue 1 , 2019 , Pages 87-101 ; 22286187 (ISSN) Moradi, H ; Ghabraei, S ; Vossoughi, G ; Sharif University of Technology
    Springer International Publishing  2019
    Abstract
    Moisture control of food products is of great importance in drying processes. Improving the dryer control system results in consistent production and reduction in energy consumption. In this paper, a state observer is used to estimate the moisture content and other state variables online. Estimated states are used in a control system including the regulator for disturbance rejection and robust controller for tracking objective. Since the bed dryer mechanism is a multivariable complex system associated with various uncertainties, a realistic uncertain model is considered. Moisture content and temperature of tea leaves (or other food products) are controlled at desired set points by... 

    The promotion of innovation in regulated network industries

    , Article International Review of Environmental and Resource Economics ; Volume 15, Issue 1-2 , 2021 , Pages 137-174 ; 19321465 (ISSN) Mirnezami, S. R ; Sharif University of Technology
    Now Publishers Inc  2021
    Abstract
    The capital intensive network industries such as electricity and gas delivery infrastructures exhibit natural monopoly characteristics because of their high economy of scale relative to the size of the market. Due to the absence of direct competition in these regulated industries, infrastructure providers hardly undertake the appropriate level of innovation activities to optimise the operation and continuity of their services; a review is provided to show how different countries support innovation in the network industries. As innovation activities are costly and risky undertakings, a relevant query is how to incentivise innovation through economic regulations. This paper models three... 

    Optimal contract design for purchasing from frequency regulation service providers with private information

    , Article IEEE Transactions on Power Systems ; Volume 34, Issue 3 , 2019 , Pages 2445-2448 ; 08858950 (ISSN) Rayati, M ; Sheikhi, A ; Ranjbar, A. M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2019
    Abstract
    In this letter, an incentive compatible contract is designed for purchasing energy and ancillary service (AS) simultaneously from strategic frequency regulation service providers (FRSPs) by considering information asymmetries between independent system operator and FRSPs. Here, AS is confined to frequency reserve (FR) for arresting nadir frequency following possible contingencies of the electrical grid. An FRSP has a multi-dimensional private information vector, which determines its operational cost and limitations. Moreover, there is a gaming opportunity for an FRSP that is arisen between energy and AS payments manifesting by manipulation of its bids. Thus, in this letter, a multi-object... 

    Modeling the Endothelial Function in the Brachial Artery Using Photoplethysmography

    , M.Sc. Thesis Sharif University of Technology Mashayekhi, Ghoncheh (Author) ; Zahedi, Edmond (Supervisor) ; Jahed, Mehran (Supervisor)
    Abstract
    Flow Mediated Dilation (FMD) is a non-invasive method for endothelial function assessment providing an index extracted from ultrasonic B-mode images. Although utilized in the research community, the difficulty of its application and high cost of ultrasonic device prevent it from being widely used in clinical settings. In this study we show that substituting the ultrasonic device with more easily handled and low cost photoplethysmography and electrocardiography is possible. We introduce new indices based on the photoplethysmogram (PPG) and electrocardiogram (ECG) and show that they are correlated with the ultrasound-based FMD index. To this end, conventional ultrasound FMD test was carried... 

    Good Governance Structure for Securing the Supply of Oil Products at Iran's Transportation Sector

    , M.Sc. Thesis Sharif University of Technology Ghorbani, Ali (Author) ; Maleki, Abbas (Supervisor)
    Abstract
    The oil refining industry, as the first oil supply chain, is of great importance. By examining the issue of the Iranian Oil Refining Industry, using the game theory, one can find an accurate analysis of the barriers to the development of this industry. For this purpose, the main factors affecting the oil refining industry, the government and the refinery's owner, are modeled and their benefits are considered. By examining the relationship between these actors and their actions, the following strategies are proposed to improve the administration and regulate the Iranian oil refining industry:
    1- Refining feed prices, according to the quality of crude oil (sulfur content and API... 

    What drives mergers and acquisitions waves in developing countries? Evidences from Iranian banking industry

    , Article Iranian Economic Review ; Volume 19, Issue 2 , 2015 , Pages 123-137 ; 10266542 (ISSN) Zarei, M ; Alambeigi, A ; Karimi, P ; Zarei, B ; Sharif University of Technology
    Abstract
    Many Middle-East countries, like Iran, have dynamic banking industries and have observed merger and acquisitions (M&A) waves. M&A waves are usually defined in the developed world context and some of their main drivers were identified as: market timing, environment's shocks, merger manias, government regulation and regulatory, and technological changes. It has been discussed that merger waves and their reasons are among the ten most important unsolved mysteries in the field of finance (Brealey and Myers, 1991, p. 923), and as a result of this, it was not possible to completely clarify the reasons behind emerging M&A waves, especially in developing countries; for this reason in these... 

    Application of z-source inverter in improving cross regulation of multiple output full-bridge based DC-DC converter

    , Article IECON Proceedings (Industrial Electronics Conference), 24 October 2016 through 27 October 2016 ; 2016 , Pages 3265-3269 ; 9781509034741 (ISBN) Kaboli, S ; Karimi, Y ; Sharif University of Technology
    IEEE Computer Society  2016
    Abstract
    This paper investigates the multiple output full bridge based DC-DC converter and derives the analytical expression for its cross regulation. The effect of input voltage is studied and a topology is proposed that boosts the input voltage by a single stage structure. The proposed converter is based on Z-Source Inverter. In addition, the modulation scheme of the converter is presented. Simulation and experimental results are presented to verify the analytical study  

    Development of an esco risk assessment model as a decision-making tool for the energy savings certificates market regulator: a case study

    , Article Applied Sciences (Switzerland) ; Volume 10, Issue 7 , 2020 Ahmadi, M ; Hatami, M ; Rahgozar, P ; Shirkhanloo, S ; Abed, S ; Kamalzadeh, H ; Flood, I ; Sharif University of Technology
    MDPI AG  2020
    Abstract
    This article is focused on developing an Energy Service Company (ESCO) risk assessment model for use by energy savings certificates (ESC) market regulators. This model enables market regulators to determine the appropriate point in time for ESCOs to sell their certificates with the aim of minimizing risk as well as maximizing economic gain yet remain motivated for reducing the cost of energy efficiency technologies. To this end, the interactions between an ESCO and other parties (such as suppliers) in the market in addition to the principles of the energy efficiency performance contract are taken into consideration. Then, appropriate probability distributions have been fitted to the... 

    Modeling of Static Series Voltage Regulator (SSVR) in distribution systems for voltage improvement and loss reduction

    , Article Leonardo Electronic Journal of Practices and Technologies ; Volume 7, Issue 12 , 2008 , Pages 61-82 ; 15831078 (ISSN) Hosseini, M ; Shayanfar, H. A ; Fotuhi Firuzabad, M ; Sharif University of Technology
    2008
    Abstract
    This paper introduces the modeling of Static Series Voltage Regulator (SSVR) in the load flow calculations for steady-state voltage compensation and loss reduction. For this approach, an accurate model for SSVR is derived to use in load flow calculations. The rating of this device as well as direction of required reactive power injection to compensate voltage to the desired value (1p.u.) is derived, discussed analytically, and mathematically using phasor diagram method. Since performance of SSVR varies when it reaches to its maximum capacity, modeling of SSVR in its maximum rating of reactive power injection is derived. The validity of the proposed model is examined using two standard... 

    Energy and contingency reserves markets under restructured electricity environment

    , Article 2006 IEEE GCC Conference, GCC 2006, Manama, 20 March 2006 through 22 March 2006 ; 2006 ; 9780780395909 (ISBN) Rashidinejad, M ; Gharaveisi, A. A ; Fotuhi Firoozabad, M ; Shojaee, M ; Sharif University of Technology
    2006
    Abstract
    Electricity industry is ongoing towards reregulation worldwide. Some new market issues that experienced in other commodities markets are suggested to be exercised in electricity markets. Electricity and ancillary services pricing under different schemes are such issues. Pricing mechanism can be applied via several sequential markets. A day-ahead market associated with joint energy and ancillary services dispatch is used as a benchmark for contingency reserves option pricing. This paper proposed a new methodology aimed to derive the option pricing for contingency reserves as a major part of ancillary services in restructured power systems  

    Modeling and analysis of the dynamic response of an off-grid synchronous generator driven micro hydro power system

    , Article International Journal of Renewable Energy Development ; Volume 10, Issue 2 , 2021 , Pages 373-384 ; 22524940 (ISSN) Ali, W ; Farooq, H ; Rasool, A ; Sajjad, I. A ; Zhenhua, C ; Ning, L ; Sharif University of Technology
    Diponegoro university Indonesia - Center of Biomass and Renewable Energy (CBIORE)  2021
    Abstract
    This paper models and analyses the dynamic response of a synchronous generator driven off-grid micro hydro power system using Simulink tool of MATLAB software. The results are assessed from various perspectives including regulation through no load to full load and overload scenarios under normal and abnormal operating conditions. The investigation under the normal conditions of no load, linearly changing load and full load divulges that the system operates in a satisfactory manner as generator voltage and frequency remain approximately constant at 1 pu. However, at full load generator voltage and frequency drop 3% and 0.5% respectively from its nominal values but remain within prescribed... 

    Modeling and analysis of the dynamic response of an off-grid synchronous generator driven micro hydro power system

    , Article International Journal of Renewable Energy Development ; Volume 10, Issue 2 , 2021 , Pages 373-384 ; 22524940 (ISSN) Ali, W ; Farooq, H ; Rasool, A ; Sajjad, I. A ; Zhenhua, C ; Ning, L ; Sharif University of Technology
    Diponegoro university Indonesia - Center of Biomass and Renewable Energy (CBIORE)  2021
    Abstract
    This paper models and analyses the dynamic response of a synchronous generator driven off-grid micro hydro power system using Simulink tool of MATLAB software. The results are assessed from various perspectives including regulation through no load to full load and overload scenarios under normal and abnormal operating conditions. The investigation under the normal conditions of no load, linearly changing load and full load divulges that the system operates in a satisfactory manner as generator voltage and frequency remain approximately constant at 1 pu. However, at full load generator voltage and frequency drop 3% and 0.5% respectively from its nominal values but remain within prescribed... 

    Designing a Reward-Penalty Scheme to Improve Technical Performance of Distribution System Employing Distributed Generation (DG) Resources

    , M.Sc. Thesis Sharif University of Technology Jooshaki, Mohammad (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotuhi Firuzabad, Mahmud (Supervisor)
    Abstract
    Reward-penalty schemes are known as the most effective tools to regulate the service quality. This thesis tries to design a comprehensive reward-penalty scheme to properly motivate electricity distribution companies (DisCos) to improve the reliability and reduce the energy losses in their networks using Distributed Generation (DG) Resources. So, as the first step, the designing methods of reward-penalty scheme (RPS) and their advantage and disadvantages are introduced, and also a method based on concept of the Yaredestic theory is proposed. The proposed method uses the Fuzzy clustering and is able to set the parameters of RPS in a fair and efficient way. The proposed RPS is implemented on... 

    A new t-type direct AC/AC converter

    , Article 6th Annual International Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2015, 3 February 2015 through 4 February 2015 ; February , 2015 , Pages 247-252 ; 9781479976539 (ISBN) Khodabandeh, M ; Zolghadri, M. R ; Noroozi, N ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2015
    Abstract
    In this paper a novel T type scheme for 1-phase direct ac/ac converters is proposed. In this topology, frequency changing takes place directly (without common DC voltage bus) through three converters that are connected in a T structure. Unity power factor and precise output voltage regulation is achieved through appropriate control of these three converters. H-bridge converters are implemented, as the basic unit, in each branches of T to make the proposed converter. The converter is controlled such that the average active power of each H-bridges remains zero. So capacitors are implemented in DC links of H-bridges. In comparison to conventional back-to-back converters, life time of each... 

    A new reward-penalty mechanism for distribution companies based on concept of competition

    , Article IEEE PES Innovative Smart Grid Technologies Conference Europe, 12 October 2014 through 15 October 2014 ; Volume 2015-January, Issue January , October , 2015 Jooshaki, M ; Abbaspour, A ; Fotuhi Firuzabad, M ; Moeini Aghtaie, M ; Ozdemir, A ; Sharif University of Technology
    IEEE Computer Society  2015
    Abstract
    In this paper, a new method for designing procedure of Reward-Penalty Scheme (RPS) in distribution system is proposed. Being fair and adoptable in viewpoint of distribution companies (DisCos) are main superiorities of the proposed RPS. Established based on concept of the Yardstick theory, its application can ensure regulators that a perfect competition will be created between DisCos to improve the service reliability. Also, such a regulation scheme can be a key for power system decision makers in order to prevent the DisCos from decreasing service reliability. Aimed to reach a fair mechanism, the proposed RPS rewards/penalizes the DisCos only compared with the other ones owning similar... 

    Immune-based selection of pilot nodes for secondary voltage control

    , Article European Transactions on Electrical Power ; Volume 20, Issue 7 , 2010 , Pages 938-951 ; 1430144X (ISSN) Amraee, T ; Ranjbar, A. M ; Feuillet, R ; Sharif University of Technology
    2010
    Abstract
    Secondary voltage control is used to re-adjust the reference values of automatic voltage regulators of generators. The performance of the secondary voltage control strongly depends on pilot node selection. In this paper the two proposed control laws for secondary voltage control are discussed and then an immune based algorithm is proposed to solve the optimal pilot node selection problem. The proposed algorithm is based on the clonal selection theory. The merit of immune algorithm lies in pattern recognition and memorization capabilities. Also, to provide independency of electrical zones a decoupling factor based on electrical distance concept is proposed. To verify the network observability...