The recent discovery of superconductivity above 200 K in hydrides sulfur and lanthanum under high pressure marked a significant advance toward the realization room-temperature superconductivity. While binary have almost been completely studied theoretically, experimental evidence suggests that next breakthrough finding high-temperature low-pressure limits is likely connected with ternary higher hydrides. Unlike traditional synthesis-test-repeat approach, superhydrides often follows prior...

Abstract The recent discovery of type-VII boron–carbon clathrates with calculated superconducting transition temperatures approaching ~100 K has sparked interest in exploring new conventional superconductors that may be stabilized at ambient pressure. electronic structure the clathrate is highly tunable based on ability to substitute different metal atoms within cages, which also large enough host small molecules. Here we introduce molecular hydrogen (H 2 ) cages and investigate its impact...

Abstract The risk of natural terrestrial radioactivity on human health is often underestimated, and environmental safety awareness necessary. Hence, this study aims to assess sources gamma radiation emitter in coastal urban-environment using the radiometric technique. dosage from a parent radionuclide such as Uranium-238 ( 238 U), Thorium-232 232 Th) Potassium-40 40 K) were measured portable spectroscopy. result showed that value U activity was between 10.81 $$\pm$$ <mml:math...

Radon monitoring is essential in determining the actual level of exposure buildings. Of all reviewed works on indoor radon level, little to none was done comparative concentration study different building structures area. A types; such as glass house, bricks and basement house were evaluate sustainable using detector (RAD7) machine. The mean for brick are 14.96, 10.74 144.61 Bqm−3, respectively. Glass range from 11.03 17.46 Bqm−3. measured ranged 6.62 20.85 Bqm−3 structure. Basement...

Awareness of the dangers associated with exposure to high radiation in environment is necessary avoid its health impact, especially when staying in-door. Assessment gamma dose rate and radionuclides urban settings Ota has been carried out using a hand-held detector determine hotspot concentration study area. In this study, eighteen (18) stations were covered, radio-nuclides (Uranium-238, Thorium-232, Potassium-40) emitting from subsurface measured. The result showed that mean value for...

Abstract Investigating reconstructive phase transitions in large‐sized systems requires a highly efficient computational framework with cost proportional to the system size. Traditionally, widely used frameworks such as density functional theory (DFT) have been prohibitively expensive for extensive simulations on large that require long‐time scales. To address this challenge, study employed well‐trained machine learning potential simulate large‐size system. This work integrates metadynamics...

Solar energy is one of the primary sources replacing fossil fuels due to its abundance. Its versatility and environmental friendliness has made it most promising renewable energy. cells convert solar into Electrical Energy. The effort improve efficiency these reduction their costs been a major concern for long time. Modeling various structures provides an insight physics involved in operation better understanding ways efficiency. This work modeled Poisson Equation 2D abrupt linearly graded...

Elevated background ionizing radiation has its health effects on people who reside in such areas, this necessitate the need for constant monitoring. The activity concentrations of K-40, Th-232 and U-238 were measured three different selected study areas Ota using RS-230 gamma spectrometer. highest radionuclides recorded Industrial Estate. mean dose rate was 45.37 nGyh-1, 37.12 nGyh-1 33.33 Estate, Obasanjo Estate Atan respectively. outdoor annual equivalent estimated 0.056 mSvy-1, 0.045...

The elemental composition analysis and its concentration levels in percentage were done on several wood samples using Rutherford Backscattering Spectrometry (RBS) of Ion Beam Analytical (IBA) methods. A total twenty seven (15) tropical hardwoods from south western Nigerian environment analyzed six (6) major elements (C, O, N, Na, S, Cl) identified. Carbon has the highest constituents, ranging 58.30% to 73.46%, all with sample 4 (Albizia gummifera) having carbon as 73.46% 7 (Anadelphia...

Abstract In recent years, perovskite materials have been the focus in solar cell fabrication industry. Herein, an investigation was conducted on effect of ion-solid interactions factors are responsible for differences properties these by using a Monte Carlo simulations ion beam surface sputtering. A connection established between experimental efficiencies cells and both projected yield sputter structurally alike materials.

Abstract Copper cadmium sulphide thin film was deposited onto glass (soda-lime) substrates using chemical bath deposition (CBD) technique at room temperature. Chemical, optical, structural, and microstructural features were examined via the Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), UV-Vis Spectroscopy, High-resolution Transmission Electron Microscopy (HRTEM). FTIR revealed that associated bond below 900 cm-1 marks. The optical band-gap of 2.36 eV estimated from...

Abstract Natural radionuclides content of 238 U, 232 Th and 40 K for water sediment samples collected from Asa-dam Ilonn. Nigeria weremeasured using Nal( TI ) detector. The mean activity concentration in the were 6.05, 3.23 9.65 Bql −1 respectively. measured 7.57, 8.19 73.48 Theactivity was higher than that U samples. All estimated radiological parameters below world permissible limit values. Therefore, there may be no serious immediate health burden on environment people dam.

The poor access to water quality for Nigerians has pushed the designing of new trend silver nitrate impregnated locally made Point-Of-Use (POU) ceramic filters enhance purification efficiency household use. This study utilized nitrate-molded prepared with Kaolin from Owode, silt soil, sodium silicate, sawdust, and distilled in three varying proportions ascertain pollution removal efficiencies. Heating was carried out by firing at 900 °C further preheating 400 after dipping solution. Silver...

Metallic uranium-based alloys, with d-transition metals such as Nb, Mo, and Zr, are promising candidates for actinide fuel. For this purpose, their behaviors under changing physical stimuli need to be understood. Here, we systematically investigate U–Nb intermetallic compounds predict new compound formations different pressures using the first-principles swarm-intelligence structure searching method. Two (U1Nb6 U2Nb1) were identified thermodynamically stable at ambient high pressures. U1Nb6...

Building maintenance projects have been characterized by poor quality delivery, which leads to client dissatisfaction. The contractor’s personnel evolve around the uncertainties that surrounds decisions, makes success of a project dicey. Hence, this study seeks identify critical factors determine performance outcome building in Lagos State, Nigeria. A quantitative research approach was adopted for using questionnaires and interviews data collection. Mean score, ANOVA, factor analysis...

Metal halide perovskites have been the subject of intense theoretical and experimental research in recent years due to their huge potential over silicon based counterparts for tunable optoelectronic applications high-tech device innovation. The current best perovskite solar cell applications, with a power conversion efficiency 22%, methyl ammonium lead iodide (CH3NH3PbI3), is toxic presence therefore harmful despite its low concentration cells. Hence, exploits are geared towards without...

Several accessible power supply equipment with different difficulty levels and complexity mostly give a singular DC output that does not provide same use when an Output AC Power is quite low to great extent preferred. In this work, stabilize, fixed varying device has voltage of 0.5 V 18.15 variable DC, current range from 0 - 0.88 A short circuit protection was constructed by using inexpensive materials, fuse used as breaker . Likewise, we examined the regulation attributes units just been...

The concentrations of lead (Pb), Cadmium (Cd), Chromium (Cr), Nickel (Ni), B and Fe in twenty (20) different brands bottled water samples were investigated to ascertain the risk exposure consumers using Atomic Absorption Spectrometry (AAS). heavy metals analyzed varied from samples. BE sample was found contain least concentration Pb with a value 0.0232 mg/l. chronic daily intake (CDI) determined based on United State Environmental Protection Agency (USEPA) model for health risk. It observed...