Dark energy is an intrinsic property of the space-time. At astronomical distances, it is the energy strongly believed to be driving the observed accelerated expansion of the space-time or the universe as whole. Analytical and statistical methods have been used in this work to fin...
Open access
Research Article10.9734/ajr2p/2025/v9i2193
The performance and efficiency of photovoltaic (PV) modules are affected by various environmental factors, including solar radiation, temperature, humidity, and magnetic fields. In this study, one PV module was installed with an applied magnetic field, while another module, insta...
Open access
Research Article10.9734/ajr2p/2025/v9i2192
We have used both analytical methods and statistical methods to find if there is any possible effect of observed space-time expansion on some extragalactic sources – the radio-loud quasars. This is done by carrying out linear regression analysis on larger radio-loud quasars and o...
Open access
Research Article10.9734/ajr2p/2025/v9i2191
The study presents the development of an Arduino-based photoelectrochemical (PEC) cell instrument for determining semiconductor conductivity types. Integrating nine functional units, including sensing, storage, and display modules, the device automates data collection under light...
Open access
Research Article10.9734/ajr2p/2025/v9i2190
Aerosol optical depth is a key parameter and important factor for understanding climatic change and environmental pollution. This study presents long term (2004-2023) investigation of spatial and temporal variation and trends in AOD over Nigeria retrieved from Moderate Resolution...
Open access
Research Article10.9734/ajr2p/2025/v9i2189
The seasonal and annual variation of the solar quiet of the horizontal magnetic field along the African geomagnetic equator during the ascending phase of solar cycle 24 has been investigated. This has been done using magnetic field measurements obtained from International Real-ti...
Open access
Research Article10.9734/ajr2p/2025/v9i2188
This study examines the physico-mechanical properties of briquettes produced from Neem (Azadirachta indica) and Tropical Almond (Terminalia catappa) branch residues, processed in both raw and torrefied forms, using cassava starch flour and African locust bean (Parkia biglobosa) p...
Open access
Research Article10.9734/ajr2p/2025/v9i2187
A voltmeter capable of accurately measuring and providing remote monitoring for both AC and DC voltage is crucial in modern application, especially with the growing demand for IoT based devices. Real-time voltage measurement poses challenges, particularly in ensuring reliability...
Open access
Research Article10.9734/ajr2p/2025/v9i2186
In this mini review article, it has been discussed on progressive development of Indian Space Research Organisation (ISRO) as a premier space agency in international space arena for executing tasks related to space-based applications, space exploration and the expansion of relate...
Open access
Research Article10.9734/ajr2p/2025/v9i2185
In order to determine the depths of magnetic sources in the study area, this study offers a thorough evaluation of high-resolution aeromagnetic data using quantitative and qualitative methodologies, including spectral depth analysis, filtering techniques, and statistical analysis...
Open access
Research Article10.9734/ajr2p/2025/v9i1184
This study centered on determining the optical characteristics of Rutile nanoparticles and synthesizing them using a ball milling process. A top-down approach was utilized to obtain nanoparticles from the bulk materials utilizing high intensity ball milling technique. The crystal...
Open access
Research Article10.9734/ajr2p/2025/v9i1183
Solar drying is a very old but continuously explored technology so that everyone can use to dry food products from meat, vegetables, cereals and the dairy products. However, over the time with increased pollution to both the air and water, the sun drying has been deteriorating. S...
Open access
Research Article10.9734/ajr2p/2025/v9i1181
The magnetic field will attract ferrous materials like iron or nickel. It also attracts or repels other magnets depending, on the polarity of the other magnets Permanent magnets are made from materials that will remain magnetized and are hence able to maintain the magnetic field...
Open access
Research Article10.9734/ajr2p/2025/v9i1182
The use of the reduced mass concept as opposed to the rest mass seems to give conflicting results. The objectives were to derive variants of the equation of the Rydberg constant (R∞), fine structure constant, and wave number that relate with the Rydberg constant. The derived R∞ e...
Open access
Research Article10.9734/ajr2p/2025/v9i1180
In-situ measurement of background ionizing radiation level of the Faculty of Engineering Technology (FET) in Federal Polytechnic Nekede, Owerri, Imo State has been carried out, with the use Radiation meters (Digilert-200). The Global Positioning System (Garmin 765) was utilized i...
Open access
Research Article10.9734/ajr2p/2025/v9i1179