Research Papers/Topics in Physics

Construction of X/S Band for Nigeriasat-2 Mission Control Centre and Validation of Data from the Satellite

ABSTRACT A fully automated X/S band Mission Control Centre (MCC) for the Nigeriasat-2 (N2) and Nigeriasat X (NX) satellites was constructed in Abuja. The construction of the MCC consisted of the installation of the appropriate size of antenna and computer systems used for the control of the entire satellite mission. The MCC of N2/NX consists of three main segments: the ground station (GS) used for direct communication link with the satellite, the mission control suit (MCS) used for mission co...

Fabrication and Capacitive Characteristics of Conjugated Polymer Composite (P-Polyaniline/N-Wo3) Heterojunction

Abstract A nanocrystalline and porous p-Polyaniline/n-WO3 dissimilar heterojunction at ambient temperature is reported. The high-quality and well-reproducible conjugated polymer composite films have been fabricated by oxidative polymerization of anilinium ion on predeposited WO3 thin film by chemical bath deposition (CBD). X-ray diffraction analysis of the deposited WO3 films revealed that as-deposited film was amorphous; however, an amorphous-to-crystalline phase transition was observed by r...

Investigation of Magnetic Anomalies of Chibok and Damboa Areas in North Eastern Nigeria, Using High Resolution Aeromagnetic Data

ABSTRACT The aeromagnetic data of Chibok (sheet 134) and Damboa (sheet 112) areas, southern Chad basin were interpreted qualitatively and quantitatively. Spectral Analysis, Source Parameter Imaging (SPI), Standard Euler deconvolution, Forward and Inverse modelling methods were used in the quantitative interpretation with the aim of determining depth to the magnetic source bodies, magnetic susceptibilities and the possible mineralization in the area. Oasis Montaj 6.4.2, WinGlink 1.62.08, Surfe...

Optical, Solid State and Structural Characterization of Optimized Grown Thin Films and Their Possible Applications in Solar Energy

ABSTRACT Solution growth technique was used to deposit thin films of Manganese Suphide (MnS), Calcium Sulphide (CaS), Magnesium Sulphide (MgS), Barium Sulphide (Bas), Zinc Fluoride (ZnFz) and Calcium Oxide (CaO) on micro-slides (Substrates) at different bath parameters which include temperature, molarity of solution, Volume of solution and water, time of d.eposition and pH. The absorbance, A was measured using spectrophotometer ranging from ultraviolet to visible regions. The Transmittance, T...

Phenomenology and Dynamical Evolution of Compact Steep Spectrum Sources

ABSTRACT Statistical, analytical and numerical methods have been used to develop a model for phenomenology and dynamical evolution of Compact Steep Spectrum (CSS) sources through the ambient medium of density, e n , within a characteristic time, T . Results show that the empirical relation between spectral turnover, n p , and D implies that 0.34 n p e ~ n , suggesting that the spectral turnover constitutes a characteristic signature of dense gases around CSS sources. However, since the charac...

Galactic Cosmic Ray Variability in the High and Mid Latitudes During Solar Cycles 22 and 23

ABSTRACT Galactic cosmic rays are modulated in the heliosphere primarily due to the global merged interaction regions with intense magnetic field which leads to a decrease in the galactic cosmic rays throughout the heliosphere. Using long term averages of solar wind (SW) component parameters in addition to cosmic ray count rates of two high latitude Neutron monitor stations (Apatity and Thule) and two mid latitude stations (Newark and Tbilisi) with different rigidity cut-offs, we analyzed the...

Baseline Radiation Survey of Osun State

ABSTRACT The radionuclides present in soil, water and selected foodstuffs taken from all the thirty local government areas of Osun State have been identified and their activity concentrations measured in order to calculate, the absorbed dose, collective effective dose equivalent and committed effective dose for the estimation of the potential biological risk/damage of naturally occurring radionuclides in the State. One hundred and twenty six samples each of soil, water, yam flour, cassava flo...

Synthesis and Characterization of Nanostructured Zinc Oxide Thin Films Using Aqueous Chemical Method

ABSTRACT In this work, we report on the synthesis of Zinc Oxide (ZnO), by a cost effective and low temperature aqueous chemical method on conducting glass substrates. The grown nanostructures have been characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), optical absorption techniques and Raman spectroscopy. Resistivity of the films was studied with I-V data for the ZnO samples. SEM images show the formation of flower, bud, star,...

Investigation of Magnetic Anomalies of Ubiaja and Illushi Areas in Northern Anambra Basin Using Aeromagnetic Data

ABSTRACT The aeromagnetic data of Ubiaja and illushi area that fall within latitude to and longitude to were interpreted qualitatively and quantitatively. The qualitative interpretation revealed that the area is intensely faulted with major anomalies (faults) trending in the northeast and southwest directions. Standard Euler deconvolution, source parameter imaging (SPI), spectral analysis and modelling (forward and inverse) methods were employed in the quantitative interpretation aimed at det...

Microwave Assisted Synthesis of Zno and Tio2 Photo-Electrode for Dye Sensitized Solar Cell

ABSTRACT Dye sensitized solar cells (DSSCs) have been under extensive research. Since the color of the device can be easily varied by choosing different dyes and cells on flexible substrates, DSSCs are especially attractive for Building Integrated Photovoltaics (BIPV). The cell concept is believed to reduce the production costs and energy payback time to a large extent compared to standard silicon cells or other thin film cells. Dye sensitizer absorbs the incident sunlight and exploits the li...

Synthesis and Characterization of Some Halides and Chalcogenide Crystals Using Sol-Gel Method.

Abstract In this research work, sol-gel technique was used to grow some crystals of halide and chalcogenide compounds. These grown crystals were doped with locally produced dopants from bamboo, raffia and potash to see how they can affect the optical and structural properties of the crystals. Dopants were produced from local materials using top down approach where bulk materials (bamboo, potash and raffia) were whittled down through burning into carbon dioxide, water and residual ashes contai...

Comparison Between Calculated and Measured Entrance Skin Dose of Common Radiographic Procedures in Benue State University Teaching Hospital, Makurdi

ABSTRACT The Entrance Skin Dose (ESD) for common radiographic examinations of forty (40) patients was measured prospectively at the Benue State University Teaching Hospital, Makurdi using LiF thermo-luminescent dosimeter (TLD) chips. The examination comprised ten (10) patient’s each of chest, abdomen, pelvic and lumbar sacral regions.The mean ESDs obtained by LiF TLD for Chest X-ray (PA), Plain Abdomen, Lumbar Spine (AP) and Pelvic (AP) were 0.50 mGy, 0.20 mGy, 0.80 mGy, 0.70 mGy respective...

Determining Global Solar Radiation Incident on Tilted Surfaces with Different Tilt Angles at the Department of Physics Makerere University

ABSTRACT Solar radiation data at horizontal level, tilted surfaces and in the atmosphere is an important feature in solar energy applications such as photovoltaic systems for electricity generation, solar collectors for heating and passive solar devices. This study presents an investigation of the dependence of global solar radiation incident on a tilted surface on some meteorological parameters for different tilt angles based on measured meteorological data of sunshine, relative humidity and...

Electricity and Magnetism

A detailed study about Electricity and Magnetism Electric charges and induction, Electric Field and Electric Field Lines, Electric Flux etc.

Determining Global Solar Radiation Incident on Tilted Surfaces with Different Tilt Angles at the Department Of Physics Makerere University

ABSTRACT Solar radiation data at horizontal level, tilted surfaces and in the atmosphere is an important feature in solar energy applications such as photovoltaic systems for electricity generation, solar collectors for heating and passive solar devices. This study presents an investigation of the dependence of global solar radiation incident on a tilted surface on some meteorological parameters for different tilt angles based on measured meteorological data of sunshine, relative humidity and...


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