ABSTRACT Geophysical method was used to investigate the effects of Aba-Eku public refuse dumpsite in Ibadan on groundwater quality.
ABSTRACT Background: Health-Related Quality of Life is a multidimensional construct referring to patient’s perception of the impact of disease and treatment on their physical, psychological, social function and wellbeing. HIV and Tuberculosis are two diseases of public health importance and there is paucity of data on the quality of life of patients who suffer from these diseases in Nigeria. This study was carried out to measure, compare and identify factors affecting health-related quality...
ABSTRACT The aim of the study was to measure the entrance surface dose for selected diagnostic Xray examinations using calibrated thermoluminescent dosimeters on an anthropomorphic phantom. Dose measurement obtained with PCXMC software calculations were used to estimate the stochastic radiation risks and age-dependent mortality rates for subsequent assessment of lifetime cancer risk. Entrance surface dose per examination was estimated from X-ray tube output parameters in two digital X-ray uni...
Abstract. We briefly present the motivation, architecture and usage experience as well as proof statistics for a new Rodin Platform proof back-end based on the Why3 umbrella prover. Why3 offers a simple and versatile notation as a common interface to a large number of automated provers including all the leading SMT-LIB and TPTP compliant tools. The plug-in can function either in a local mode when all the provers are installed locally, or remotely as a cloud service. We discuss the experience ...
ABSTRACT According to the Radiotherapy Risk Profile report by the World Health Organization (WHO), the major causes of severe radiotherapy incidents are due to human errors. The real danger is when the error in administration goes undetected during cancer treatments. This may lead to radiation damage to normal tissues, and may be lethal to the patient. The aim of this work was to develop a transit dosimetry calculation model using C++ and vb.net codes for verifying patient radiation doses us...
Abstract An entry length is always observed before laminar flow is achieved in fluid flowing in a conduit. This depends on the Reynolds number of the flow and the degree of smoothness of the conduit. This work examined this region and the point where laminar flow commences in the context of flow through conduit packed with porous material like beads, of known porosity. Using some theoretical assumptions, it is demonstrated that permeability varies from zero at wall–fluid boundary to maximu...
ABSTRACT Many practical seepage and drainage problems can be studied by constructing flow nets for section with a single permeability, however many natural soil deposits are more or less stratified often with horizontal bedding that make horizontal permeability much greater than the vertical.
ABSTRACT This work presents the adsorption capacities of some heavy metals in clay soil and its application in medical field. Nitrate of lead solution of different concentrations were prepared (400ppm, 800ppm… 6400ppm). Each concentration of lead nitrate solutions was mixed with a known volume of clay. Slabs of regular dimensions were formed from the residue after it had gone through filtration. Each slab (dried) was irradiated with x-ray radiation at different energies; 40kev, 60kev, 80kev...
ABSTRACT Climate variability is indicated as anomalies in weather parameters such as rainfall and temperature. These are being influenced by greenhouse gas emissions such as carbon dioxide (CO2) and methane (CH4), amongst others. This variability is usually studied using General Circulation Models (GCMs) and empirical models obtained from analyses of data at synoptic weather stations. The GCMs give different predictions from model to model due to parameterisations of microprocesses embedded ...
ABSTRACT Quality control tests have been undertaken on thirteen mammography systems with the aim of optimizing procedures and patient radiation protection, establishing diagnostic reference levels (DRLs) and establishing quality control (QC) baseline data for the diagnostic mammography practice in Ghana. Quantitative image quality analysis was performed with “ImageJ” software using the “Rose Model” while all other tests were performed using internationally accepted protocols. Results...
ABSTRACT Two diode lasers with optical spectroscopic properties for absorption and emission spectroscopy have been used as sources in the study of economically important biological materials. In the emission spectroscopy a fluorosensor with a diode lasing at 396 nm was used to conduct in-vivo and invitro water-stressed study on the leaves of male and female plants by recording their chlorophyll fluorescence induction kinetics at the red and far-red bands as well as their ratios. Using the c...
ABSTRACT Almost two thirds of the world's population lives within 400 km of the ocean shoreline; just over half live within 200 km, an area only taking up 10% of the earth's surface. As the world's population continues to grow at an alarming rate, fresh water supplies are constantly being depleted, bringing with it issues such as saltwater intrusion and increasing the importance of groundwater monitoring, management, and conservation. Constant monitoring of the fresh/salt water interface is n...
ABSTRACT The occupational exposure due to RF radiation leaks inside the base station cabin, when working on the Base station Transceiver (BTS) Radios and TX cables and during active radio communication was measured. A total of number 30 base stations Cabins were studied in the eastern part of Nigeria, using a Broad band TES-90 Electrosmog meter. The maximum instantaneous electric field strength obtained from GSM 1800 radio was 3.72 V/m, 16.56 V/m for GSM 900 radio and 11.29 V/m for the Tx ca...
ABSTRACT The total investment cost of a pipeline network to transport carbon dioxide (CO2) from power plants for enhanced-oil-recovery (EOR) in oil fields in Texas Gulf Coast as CO2 mitigation has been estimated. The impact of the CO2 capture and transport on power generation cost, including the benefits of atmospheric CO2 mitigation has also been determined. 14 power plants comprising 55.7% of installed capacity in Texas Gulf Coast were selected. Geographical-informationsystem was used to op...
ABSTRACT The ionospheric phase refractive index is a complex function that determines the attenuation and the trajectory of radio signals through the ionosphere. This complex refractive index model has been obtained using the Maxwell's equations, the tensorial conductivity equation, electron collision models, and the geomagnetic field model. The model has been used to study and investigate the phase refractive index on radio wave propagation for high latitude, low latitude and equatorial regi...