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    Social Networks, Collaboration Graphs and Random Graphs

    , M.Sc. Thesis Sharif University of Technology Rasekhi KHorrami, Vista (Author) ; Mahmoodian, Ebadollah (Supervisor)

    Modeling and Design of CCHP System for Sharif Energy Research Institute

    , M.Sc. Thesis Sharif University of Technology Rasekhi Kazerooni, Hussein (Author) ; Sabbohi, Yadollah (Supervisor)
    Abstract
    The aim of the present research project has been techno-economical analysis of using a CCHP (Combined Cooling Heating and Power) technology at the building of Sharif Energy Research Institute (SERI). The CCHP at SERI is supposed to supply energy required at the building. Useful energy demand at the building include heating in winter, cooling and air conditioning in summer, lighting and power requirement of electric appliance and equipments. Since there are many technologies that could be utilized as CCHP, an optimal model of energy supply system of the building has been developed in order to identify the most appropriate technology. The application of model has enabled techno logical... 

    A new slew rate enhancement technique for operational transconductance amplifiers

    , Article International Journal of Circuit Theory and Applications ; 2021 ; 00989886 (ISSN) Ebrahimi, E ; Roozbakhsh, A ; Rasekhi, M ; Sharif University of Technology
    John Wiley and Sons Ltd  2021
    Abstract
    This paper presents a new symmetric slew rate enhancement (SRE) circuit suitable for operational transconductance amplifiers (OTAs). The proposed SRE circuit is composed of two auxiliary circuits which are automatically activated during fast signal transitions (slewing) by comparing the input and output signals. The auxiliary circuits pump required current in/out the load capacitance. In this way, the slew rate of the amplifier is significantly improved without any extra static power dissipation. The proposed technique can be applied to a variety of operational amplifiers. However, incorporating the proposed SRE circuit into a folded-cascode amplifier (FCA) results in 7× slew rate... 

    A new slew rate enhancement technique for operational transconductance amplifiers

    , Article International Journal of Circuit Theory and Applications ; Volume 50, Issue 3 , 2022 , Pages 997-1014 ; 00989886 (ISSN) Ebrahimi, E ; Roozbakhsh, A ; Rasekhi, M ; Sharif University of Technology
    John Wiley and Sons Ltd  2022
    Abstract
    This paper presents a new symmetric slew rate enhancement (SRE) circuit suitable for operational transconductance amplifiers (OTAs). The proposed SRE circuit is composed of two auxiliary circuits which are automatically activated during fast signal transitions (slewing) by comparing the input and output signals. The auxiliary circuits pump required current in/out the load capacitance. In this way, the slew rate of the amplifier is significantly improved without any extra static power dissipation. The proposed technique can be applied to a variety of operational amplifiers. However, incorporating the proposed SRE circuit into a folded-cascode amplifier (FCA) results in 7× slew rate... 

    Test based Software Repair Recommendation

    , M.Sc. Thesis Sharif University of Technology Rasekhi, Mahnaz (Author) ; Mirian Hosseinabadi, Hassan (Supervisor)
    Abstract
    Debugging programs is a time-consuming and error-prone activity. So far, much research has tried to repair the programs automatically. Many of them try to change the location of the fault for a faulty program that fails at least one of its test cases so that all cases in the test suite pass. However, in real projects, the test suite is usually not enough, and the methods that aim to pass the test suite, often lead to the production of incorrect repairs, which is known as overfitting or weak test suite. In this regard, attention to methods based on program specification and the use of static code analysis have shown promising results. In this thesis, a method is presented that recommends... 

    Production of drug Loaded Microgels Using Microfluidic

    , M.Sc. Thesis Sharif University of Technology Mehraji, Sima (Author) ; Saadatmand, Maryam (Supervisor) ; Eskandari, Mahnaz (Supervisor)
    Abstract
    Microfluidic systems have the ability to produce microgels with uniform size distribution and spherical shape due to the laminar flow and better control of the flow rates. Spherical microgels with same size can be used as high-potential carriers for drug release. An important challenge in the production of these drug-carrying microgels is the simultaneous process of drug loading into microgels and their production. The overall goal of this project was to produce drug-carrying microgels with uniform size distribution that show controlled drug release. To achieve this goal, various factors such as the type of polymer, the type of drug, the volume ratio of the polymer and the drug and the... 

    Design and Fabrication of Microfluidic System to Produce Microgel for Drug Delivery Application

    , M.Sc. Thesis Sharif University of Technology Shieh, Hamed (Author) ; Bastani, Dariush (Supervisor) ; Saadatmand, Maryam (Supervisor) ; Eskandari, Mahnaz (Supervisor)
    Abstract
    Due to the increasing need of use of drugs and insufficient efficiency of conventional methods, drug delivery systems has gathered a lot of interests. There are different systems existing for controlled drug delivery, among which is implementation of hydrogel microparticles (microgels) as carriers with high potential. The most important factor in these systems is size distribution of drug-carrying microgels and a narrow size distribution leads to a controlled and suitable release. Due to unique characteristics of microfluidic systems, significant focus has been placed on them nowadays for production of microgels with suitable morphology and narrow size distribution. Therefore, in this study...