Browsing by Author "Moges, Kidist"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Modeling of Silicon Nanowire Field Effect Transistors
    (Addis Ababa University, 2011-07) Moges, Kidist; Adeyabeba, Abera (PhD)
    Modeling and simulation of Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) is very essential in order to understand the device physics, electrostatics and other important phenomena occurring in this device. Therefore, in this thesis the modeling and simulation of Silicon Nano Wire field Effect Transistors (SiNW FETs) is done. The modeling is done assuming both ballistic transport and transport in the presence of scattering. The modeling of SiNW FETs assuming ballistic transport is an extension of the Natori’s theory of ballistic MOSFETs. The second part of the modeling, which is developed on the assumption of scattering transport, is based on McKelvey’s flux method. When the scattering effects are assumed to be absent, the scattering model reduces to the ballistic model. Therefore, the main novelty introduced in this thesis is the extension of the previous models and the incorporation of these two models together. After the derivation of the model, its benchmarking is also done. This is accomplished by comparing the simulation results of the developed model, which is implemented using MATLAB programming, with that of the experimental and numerical simulation results. Various important parameters are extracted and used for comparison, the main ones being the On-state current (Ion), the Off-state current (Ioff), the Subthreshold Slope (SS) and drain induced barrier lowering (DIBL). The comparison shows that there is a good agreement between the simulation results of the developed model and the experimental and numerical simulation results, which indicates the validity of the model. Finally, the effect of scaling of the physical parameters on the device performance is investigated. The main parameters chosen for this investigation are the diameter of the Nano Wire (NW) and the gate oxide thickness. When a simulation is done by varying these parameters, Ion and Ioff currents are found to be affected greatly.
  • No Thumbnail Available
    Item
    Study of CBE’s Mobile Banking Usage
    (A.A.U, 2021-01) Moges, Kidist; Kebede, Gashaw(Dr.)
    Now days, banks all over the world are changing their traditional or window based service to branchless. Ethiopian banks are also introducing different E-banking products but it is at infancy level and cash is still the dominant medium of exchange. Mobile banking is one type of E-banking product which is used to make financial transactions. But customers of Commercial Bank of Ethiopia are not satisfied with it. So understanding its success factors of is important for both customers and the bank itself. In this research, the researcher extended the Delone and McLean IS success model to the mobile banking by adding self-efficacy and trust as a success variable. This study aims to analyze the relationship between system quality, information quality, service quality, trust and self-efficacy to user satisfaction and use. In addition, the study aims to analyze the relationship between user satisfaction and use to a net impact. The model was tested by using partial least square structural equation modeling approach. It is both quantitative and qualitative study that was conducted in the form of a survey of 286 mobile banking users of Commercial Bank of Ethiopia and interview questions for some employees of Commercial Bank of Ethiopia. Both purposive and convenience sampling were applied to select bank branches and respondents respectively. Both SPSS V.20 and Smart PLS V2.0M3 were applied to analyze the demographic data and test the proposed model respectively. The findings revealed that information quality, system quality, self-efficacy has positive and significant effect on system use and user satisfaction. And service quality and trust have positive and significant effect on user satisfaction but negative and insignificant effect on system use. Finally, user satisfaction and system use have positive and significant effect on net impact. Based on the finding and conclusion, the study recommended that the bank should work on information quality, system quality and service quality of mobile banking to increase the usage of mobile banking service and its customer satisfaction. Beside this, the Bank should build its customer trust on mobile banking so as to boost its customer satisfaction and mobile banking usage.