Comparative Studies on Adduct Compounds of Schiff-Base Donors and Some Organic and Inorganic Acceptors

, M.Sc. Thesis Sharif University of Technology Hendinejad, Niloofar (Author) ; Mohammadi Boghaei, Davar (Supervisor)

Abstract

The charge transfer interaction of two Schiff-bases Bis- (2-thiophene methylene)-1,4- Benzene Di amine and Bis (2-thiophene methylene)-1,3- Benzene Di amine as donors with iodine and tetracyano ethylene as Electron acceptors have been studied spectrophotometrically. The formation constants and extinction coefficients of charge transfer complexes have been determined by graphical as well as iterative methods. From measurements at different temperatures the thermodynamic functions of the charge transfer complex formation have been studied. The temperature dependence of the K can be used for the determination of the thermodynamic reaction quantities (ΔG˚, ΔS˚, ΔH˚) for linear regression fits...

Flow Simulation to Assess Effects of Various Parameters on Performance of a Gas Ultrasonic Flowmeter

, M.Sc. Thesis Sharif University of Technology Hosseini, Niloofar Sadat (Author) ; Mazaheri, Karim (Supervisor)

Abstract

In this thesis we are going to improve an ultrasonic flowmeter accuracy by considering the influence of different parameters like temperature, pressure, etc. Firstl of all different cases of flow condition in which ultrasonic flowmeter may work are specified, then velocity and temperature profile of pipe flow are determined using Fluent software. In thr next step ultrasonic pulses transmitted are simulated by the use of code written in Matlab to find wave travel time in the flow. Evetually an accurate relation of calibration for flowmeter is determined by the use of travel time and all other flow properties to evaluate the accuracy of flowmeter in diffent cases. Relation extracted can be...

Instagram and its Relation to Moral Values

, M.Sc. Thesis Sharif University of Technology Hosseini Renani, Niloofar Sadat (Author) ; Hosseini, Hassan (Supervisor)

Abstract

In this thesis, the value-ladenness or value-neutrality of technology, new social media and as a result Instagram is investigated. It is also discussed whether values can be taken into account during the design process of technical artefacts, including new social media and Instagram, and methods are developed for this purpose. Several methods have been developed for this purpose, some of them and their compatibility with modern social media are explained; including the Value-Sensitive-Design method and the disclosive computer ethics design method. The frameworks of ethical philosophy such as virtue ethics are reviewed and the appropriate ethical framework for the analysis of new social media...