The aim of this paper is to assess and develop path loss propagation model for terrestial radio broadcasting station in Ikire, Nigeria. In carrying out the study, the reception quality of Osun State Corporation (OSBC) broadcast signal strength within Ikire metropolis in Irewole Local Government Area of Osun State, Nigeria was assessed using BC1173 Field Strength meter. The data obtained from the signal strength measurements around the metropolis were subsequently analysed and used for the development of an ideal propagation path loss model for the metropolis. The developed path loss model for the metropolis was evaluated and found to outperform the COST-231 Hata model in literature. The comparative performance evaluation result of the developed model and the COST-231 Hata model buttresses the need for developing different path loss models for different radio signals in different locations under different environmental factors. In addition, the finding of the study establishes a standard propagation path model that can be used for planning and designing efficient wireless communication link for terrestrial radio broadcasting station in the metropolis and any other environments with similar environmental factors.

The purpose of this work is to investigate and quantify x-ray fluorescence, its production and its spectroscopy. Characteristic x-ray with different energies were obtained from six various elements using Am-241 source with 59.5 keV. It was found that x-ray energy and intensity increase with increasing atomic number of material. X-ray spectroscopy was studied for such elements in respect to their atomic number and intensity of Kα characteristic x-ray using proportional counter. Furthermore, x-ray fluorescence was produced from different thickness of copper foil using different energies. It was found that there is no substantial different in x-ray fluorescence yield with higher thickness of the target.

In this study, MAG welding method was used. 2 mm thick TRIP 800 steel sheets are used in different welding parameters. Microstructures of welded joints were analyzed by taking OM (optical microscope) images from the main metal areas of the welding zone, HAZ (the region under the influence of heat). Depending on the welding parameters, (welding current: 40-50-60 Ampere, and welding speed: 5-7.5 mm/sn), ferritic, HAZ and martensitic phase regions were determined in microstructures in the main metal, HAZ and welding regions, respectively. The strengths of the welded connections were measured using the tensile test. Welding wire speed is chosen to obtain high penetration and ideal width welding seams. The strength of the welded bond using these parameters is determined as 1266 MPa as the highest value. It was determined that grain growth and martensitic phase transformations occur in fusion regions and result in brittle fracture. The Fusion zone and other regions were analyzed with finite elements.

In this study, Penning ion trap, which traps ions using electric field and magnetic field, is investigated. Penning traps are used in many laboratories around the world. Penning trap is used for mass determination as a mass spectrometer in basic physics research, for controlling quantum states and for ion trapping. Simbuca simulation program was used for other quantities of single ion or multiple ions such as ion dynamics and ion temperature. Simbuca is a modular Penning (ion) trap simulation program written in C++ programming language. Ideal Trap was used for ions. It is also used as a simulation of ion movement in a Penning trap with realistic Buffer gas collisions and Coulomb interaction using the A Graphics Card. However, Coulomb is a program applicable to other applications requiring charged particle tracking under the influence of electric and magnetic fields, with or without interaction. Buffer Gas method was used to cool the trapped ions. Helium gas, one of the noble gas atoms, was used as buffer gas. Ion dynamics of ions before and after the use of buffer gas were investigated. The data from the trap is set to 1 ms. In addition, using the same trap parameters and initial values for ions, the temperature values before and after the application of buffer gas for 100 units of 7 Li and 11 B ions were calculated separately. In addition, temperature changes for different ions were investigated using Coulomb effect for 100 ions.

Groundwater is widely used for both potable water and agricultural purposes in Turkey. In this study, groundwater quality and the factors of contamination with their impact areas has been assessed using geographical information systems and geostatistical techniques at Seyfe Lake, east of Kırşehir province. For this purpose, the samples from groundwater has been chemically analyzed depending on TS 266-2005 and WHO-2006 standards and contamination maps has been prepared using Inverse Distance Weighting (IDW) interpolation techniques. It has been thought that the contaminations at the study area is related with lithology and NO3, SO4, As, F and U increase depending on unconscious use of fertilizers and pesticides in agriculture. The groundwater that can be used as potable water has been determined around Bozçaldağ formation (marble). Therefore, it has been foreseen that Bozçaldağ formation areas can primarily be preferred for groundwater that will be used as potable water.