Sharif Digital Repository

In the first work, a stable composite film of silver nanoparticles decorated on reduced graphene oxide is easily prepared. The surface morphology of the modified electrode is characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. The electrochemical behavior of TNZ on the surface of the modified electrode is investigated by using linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). The prepared modified electrode acts as a highly sensitive platform for the voltammetric determination of tinidazole (TNZ). Voltammetric investigations demonstrated that, in comparison to the glassy carbon electrode individually coated with... 

Photocatalysts are compounds that can perform oxidation and reductions in the presence of light. One of the most known applications for photocatalyst is degrading organic contaminants in wastewater and making them harmless to the environment.In this project, a magnetic photocatalyst based on Fe3O4@ZnO/N-RGO has been synthesized and characterized with FT-IR, FE-SEM and EDS, XRD, and TGA. Moreover, photocatalytic dye degradation reactions for Rhodamine B, Methylene Blue, and Methyl Orange have been investigated and compared in the presence of Fe3O4@ZnO/N-RGO, Fe3O4@ZnO/RGO, Fe3O4@ZnO, and ZnO. Furthermore, the performance of the photocatalyst has been studied for 5 consecutive reactions and... 

The motion of gas bubbles in the bulk of a fluid can be one of the most widely used industrial phenomena. Various factors such as the size and shape of the bubbles, the physical properties of the liquid phase such as density and viscosity, method of gas injection, the presence of impurities, etc. affect this phenomenon. Some of the most important industrial processes that include the motion of bubbles in the liquid phase bulk are gas adsorption, distillation and froth flotation. According to the results of previous studies, the hydrodynamics of bubble motion in the bulk of a liquid fluid depends on the presence of impurities such as surfactants, proteins and colloidal particles. In many... 

Increasing in size and complexity of digital designs has made manufacturing process more complex and enforces more complexity in verification of designs. This makes it essential to address critical verification issues at the early stages of design cycle. Such a complicated designs needs to be tested for fabrication faults as well as functional faults. Several attempts have been made to raise the quality of testing methods with automatic test pattern generation (ATPG) and design for testability (DFT) methods in logic and lower levels. Although these techniques try to increase the testability of a circuit considerably, but there are always some overheads in area, power and performance.... 

Acceptance of new technologies in an industrial field generally takes a long time, and needs accelerators and facilitators to be thoroughly and truly understood, accepted, and then implemented. One of the most useful accelerators is Feasibility Study, which help the specialists to be confident that the whole technical and economic aspects of the issue are considered in an overall view and the technology is totally feasible and beneficial.Managed Pressure Drilling which was introduced as a new technology to drilling industry internationally in 2003 and developed rapidly till now, is one of the most useful technologies in the oil and gas wells drilling industry, and helps the Operator... 

Due to the development of electronics, technology has entered new levels of integration on a single chip, called the System-on-Chip (SoC) design. Currently a SoC may contain various Intellectual Property (IP) cores with different interface protocols. For typical SoC communication, designers implement numerous standards such as Avalon from Altera and AMBA from ARM. These standards have different topologies with their own properties and are suitable for specific applications, But the challengeable problem is testing interconnects between cores. In testing process, important elements of a bus that should be tested are interconnections between cores (wires), multiplexers, arbiters, decoders, and...