Abstract: Finding faults and partial shadow conditions are the key challenges for photovoltaic (PV) system. Furthermore, by being aware of how many broken modules and strings there are, the power loss can be averted. Some studies are conducted in this project to address these issues in order to distinguish between faults and partially shaded conditions as well as the quantity of mismatched modules and strings for a dynamic change in irradiation. Based on a straightforward observation ...
Abstract The evaluation of research and indeed any aspect of science and engineering is a complex process. Engineering research encompasses a wide range of creative, theoretical and practical activities involving many communities within a country and beyond. Such diversity, both in the communities of interest that science and engineering serves, and in the character of the research itself, poses a number of challenges to the assessment of excellence. All those responsible for the funding of ...
Abstract: The presence of harmonics in solar Photo Voltaic (PV) energy conversion system results in deterioration of power quality. To address such issue, this paper aims to investigate the elimination of harmonics in a solar fed cascaded fifteen level inverter with aid of Proportional Integral (PI), Artificial Neural Network (ANN) and Fuzzy Logic (FL) based controllers. Unlike other techniques, the proposed FLC based approach helps in obtaining reduced harmonic distortions that intend to an...
This paper presents a comprehensive analysis of power flow and fault scenarios in a complex power system configuration consisting of generators, transformers, transmission lines, buses, and loads. Utilizing MATLAB's Power System Analysis Toolbox (PSAT) and employing the Newton-Rhapson Method, power flow calculations were conducted to assess system performance under normal operating conditions. Subsequently, fault analyses, including Double Line-To-Ground Fault (DLG) and Three-Phase Fault (3φ...
This seminar paper delves into the realm of ion thrusters, which have become pivotal in driving forward space exploration amidst the growing space industry and humanity's wish to traverse the vast expanse of the solar system. It traces the evolution of ion thrusters from its beginnings to becoming the backbone of propulsion systems for deep-space missions. The paper focuses extensively on the working principles of ion thrusters, particularly the electromagnetic principles that govern their op...
Abstract: An ion sensitive field effect transistor can outperform conventional ion-selective electrodes. Thus, a zinc oxide (ZnO) nanowire field effect transistor (NWFET) pH sensor was fabricated and measured. The sensor contained a channel with 1.7×1018 cm-3 donor concentration and 100 ZnO nanowires in parallel, each with the following dimensions: 10 μm×120 nm×20 nm. The active channel is passivated with an 18 nm Al2O3 layer. The device was measured under a controlled environment with a...
ABSTRACT An intercom is a stand-alone voice communications system for use within a building or small collection of buildings, functioning independently of the public telephone network. Intercoms are generally mounted permanently in buildings and vehicles. Intercoms can incorporate connections to public address loudspeaker systems, walkie talkies, telephones. Four-way intercommunication system is nothing but the communication within four persons not close to one another. This does not mean w...
ABSTRACT An innovative approach to achieving autonomous vehicle navigation through the integration of image processing techniques and the Raspberry Pi platform. The aim is to develop a self-driving system that can analyze real-time images captured by onboard cameras and make informed decisions based on the detected objects and road conditions. By employing advanced computer vision algorithms, such as object detection and lane detection, the system can identify and tracking obstacles, recogniz...
This research reviews the effects of a standard deviation on time response and frequency response of Gaussian filter. In the research, standard deviations of 0.5, 1, 1.5, 2, 2.5 and 3 were applied to normalized Gaussian filter in time domain and frequency domain. From the result of the simulation, it was observed that in the time domain, the peak amplitude of the filter increased with a decrease in the standard deviation and the execution time decreased with a decrease in standard deviation. ...
This review paper comprehensively detailed the methodologies involved in data analysis and theevaluation steps. It showed that steps and phases are the two main methodological parameters to be considered during data assessment for data of high qualities to be obtained.It is reviewed from this research that poor data quality is always caused by incompleteness, inconsistency, integrity and time-related dimensions and the four major factors that causes error in a dataset are duplication, commuta...
Qualitative research is concerned with feelings, ideas, or experiences. Finding insights that can result in testable hypotheses is the main goal of the data collection, which is frequently done in narrative form. During the exploratory phases of a study, educators use qualitative research to find patterns or fresh perspectives. A methodology called qualitative research is created to gather non-numerical data to produce insights. It is not statistical and is either semi-structured or unstructu...
The study investigated principals’ administrative strategies as correlates of teachers’ job performance in public secondary schools in Obollo-Afor Education Zone of Enugu State. Four research questions and four null hypotheses guided the study. The study adopted a correlational survey design. The population of the study was 1,854 principals and teachers in 48 secondary schools in the Zone. A sample of 605 teachers was drawn using proportionate stratified random sampling technique. Qu...
Different path loss models have been predicted for different locations. Nevertheless, none of these models can be regarded as a superior model, because environmental factors play a vital role in the path loss of every environment. In this paper, signal attenuation prediction models for Global System for Mobile Communication (GSM) networks in the University of Nigeria, Nsukka for four different networks namely Airtel, Globacom, Mobile Telecommunication Network (MTN), and 9mobile networks w...
The use of magnetron sputtering for deposition of the metal electrode in perovskite solar cells has been limited because of the damage to the organic hole transport layer by high kinetic energy particles during the sputtering process. In this paper, a systematic investigation into the effect of sputtering power, argon flow rate, sputtering duration, and argon pressure on the performance of the perovskite cells was conducted. The results of this work show that high power conversion efficie...
In this paper, models for negative and positive clamper circuits were developed. The models developed were simulated and data collected. Simulation results obtained showed that series capacitance needed to design negative clamper circuit was directly proportional to the duty cycle and period of the input signal. Considering the positive clamper circuit, the series capacitance is inversely proportional to the duty cycle and directly proportional to the period of the input signal. Looking at th...