Titanium dioxide is hard to coat on glass or boehmite at low pH. In this study, a method to coat titanium dioxide functionalized by Ag on the glass surfaces using a Cu-containing solution is proposed. This method facilitated the coating of titanium dioxide functionalized by Ag on...
Open access
Research Article10.9734/ajopacs/2023/v11i1195
An external background ionization radiation was carried out in Our Lady Health of the sick hospital, Colworth Medical and Olive Tree Medical Diagnostics Port Harcourt. The background radiation reading was taken using the radiation alert meter (Digilert 200). The estimated value f...
Open access
Research Article10.9734/ajopacs/2023/v11i1194
In this study iron oxide (Fe2O3) nanoparticle samples was prepared using mechanical grinding method. The optical properties were studied using UV-Vis spectrophotometer within a range of 200-1100nm. The micro and crystalline size of the nanoparticle were studied using x-ray diffra...
Open access
Research Article10.9734/ajopacs/2023/v11i1193
We have examined film condensation in a channel whose walls are covered with porous media numerically. The transfers in the porous medium and the liquid film are respectively described by the Darcy-Brinkman-Forchheimer model and the equations of the hydrodynamic and thermal bound...
Open access
Research Article10.9734/ajopacs/2023/v11i1192
In this work, we present a numerical study of the thermal behavior of a hollow block with or without phase change material (PCM) in the Sahelian zone. The PCMs used in this study are RT27 paraffin and hydrated salt with a melting temperature of 27°C and 29.9°C respectively and a...
Open access
Research Article10.9734/ajopacs/2023/v11i1191
Aim: A subsurface geotechnical investigation was carried out for the purpose of establishing the depth of competent soil for foundation design and construction of a one-storey building. Study Design: The study was aimed at assessing the subsoil competence for a foundation design...
Open access
Research Article10.9734/ajopacs/2022/v10i4188
In the current energy context, geothermal systems are highly developed in the building field. Among these interesting systems on the energy plan, one finds in particular the earth-to-air heat exchanger commonly called ‘Canadian or Provençal well’. It consists of tubes buried in...
Open access
Research Article10.9734/ajopacs/2022/v10i4189
A numerical study of the natural heat and mass transfer in a cavity with a straight isoscele cross-section containing air is made in this paper. The two inclined side walls are kept in natural convection with the surrounding environment. The upper horizontal wall is subjected to...
Open access
Research Article10.9734/ajopacs/2022/v10i4190
This study seeks to propose a new model of hearth for the consumption of biogas produced by a biodigester of 4 m-3. The cylindrical furnace is used to heat an empty pot for 3 hours. To do this, the system is subdivided into two sub-systems, the first is the flame, which heats the...
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Research Article10.9734/ajopacs/2022/v10i4187
The accumulation of dust on solar panels affects the transmittance of solar panel glazing which leads to the degradation of its efficiency due to low levels of irradiance reaching the cells. In this work, the response of polycrystalline silicon solar panels toward dust in a natur...
Open access
Research Article10.9734/ajopacs/2022/v10i4186
Aims: To evaluate the radiological impact parameters on mine workers. Study Design: The research work was carried out by using a gamma–ray spectrometer with a NaI (TI) detector. Place and Duration of Study: Centre for Energy and Research Development (CERD), Obafemi Awolowo Univer...
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Research Article10.9734/ajopacs/2022/v10i3185
The present study aims at determining the level of contamination of the jawfish (Chrysichthys nigrodigitatus) by organophosphate residues in the hydroelectric dams of Faé, Kossou and Taabo. Ninety (90) fish were collected from these three dams during eight sampling campaigns. Com...
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Research Article10.9734/ajopacs/2022/v10i3184
Every radio frequency (RF) design, after its implantation, should be regularly evaluated. The kernel of this article is to evaluate the performance of four GSM networks, taking its received signal quality (RxQual) into consideration. A total of 10501, 10140, 10415 and 10690 RxQua...
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Research Article10.9734/ajopacs/2022/v10i3183
The substantial damage induced by major earthquakes requires the preparation of prevention methods before serious shocks occur. For a half-century, researchers have tried to develop an efficient method for earthquake prediction using modern scientific methods without practical re...
Open access
Research Article10.9734/ajopacs/2022/v10i3182
Aims: To analyse the radiological hazard indices from mining sites in Adamawa State, Nigeria. Study Design: Experimental study design using Gamma ray spectroscopy with a well calibrated Sodium Iodide (NaI) detector. Place and Duration of Study: Adamawa State, Nigeria and Departme...
Open access
Research Article10.9734/ajopacs/2022/v10i3181