An electrochemical deposition technique was employed to synthesize FeS material. The Iron nitrate nonahydrate (Fe(NO3)2.9H2O) and sodium sulphate (NaSO4) are part of the electrochemical bath system. The films synthesized have a polycrystalline structure with diffraction peaks and a preferred orientation along the (111) diffraction plane. The significance of high peaks lies in their ability to provide a spacious surface area for efficient photovoltaic activities. By increasing the deposition time of FeS, the film thickness decreased from 108.98 to 100.87 nm. The FeS absorbance decreases as the wavelength approaches the VIS-IR region. The FeS material had the highest absorbance value at 30 s across the entire spectrum, averaging a maximum of 0.072 in the ultraviolet region. The films deposited had energy band gaps ranging from 2.12 to 1.58 eV. The energy band gap also decreased as the deposition time and film thickness decreased. The bandgap energy range found in this study is perfect for absorbing solar energy radiation above 1.58 eV, making it ideal for solar cell absorber layers.

In this study, we use electrochemical deposition on FTO to grow BaTiS thin films. By varying the temperature of the precursors, we conducted thorough growth studies to understand how these process parameters affected the structure of BaTiS films. The diffraction peaks in the XRD pattern match the cubic barium sulfide structural phase. The observed peaks, 39.994 ° and 65.742 ° at 35 °C; 39.982 ° and 65.717 ° at 45 °C, and 39.995 °, 63.920 °, and 65.856 ° at 55 °C. The film deposited at 55 °C had a surface morphology with uniformly distributed spherical-shaped particles that formed agglomerations. The film's surface was smooth, providing a clearer look at the grain boundaries, suggesting a polycrystalline composition. The films deposited at temperatures of 35 °C, 40 °C, 45 °C, 50 °C, and 55 °C yielded energy band gaps of 2.98 eV, 2.90 eV, 2.69 eV, 2.68 eV, and 2.30 eV, respectively. The result showed that the films' energy band gap decreased as the deposition temperature increased. The varied energy bandgap of the films confirmed the effects of deposition temperature on the films.

This study assesses the activity concentration of Radon in underground water around Bagwai and Shanono artisan gold mining Sites in Kano State, Northwestern Nigeria. A total of (39) underground water samples, including sixteen (16) from boreholes and twenty-three (23) from hand-dug wells, were randomly collected. The activity concentration of Radon was analyzed using a portable radon detector, Rad7, from DURRIDGE Company. The results show that the radon concentration in all the water samples ranges from 4.13 to 45.24 Bq/l, with an average value of 20.13 Bq/l. The calculated total annual effective dose due to both ingestion and inhalation for different age groups ranges from 42.40, 57.60 and 65.30 (µSv/y) to 457.10, 622.06 and 704.60 (µSv/y), with an average value of 203.32, 276.70 and 313.51 (µSv/y) for adults, children, and infants respectively. The total excess lifetime cancer risk for different age groups varies from 0.00149, 0.00202 and 0.0247 to 0.0160, 0.0220 and 0.0247 with mean values of 0.00703, 0.00956 and 0.0109 for adults, children, and infants. The obtained results are higher than the internationally recommended limits set by USEPA of 4 to 40Bq/l and the International Commission on Radiological Protection (ICRP) value of 0.1mS/y; thus, the water in the study area is not suitable for drinking and other domestic purposes. Hence, remedial action needs to be taken by the authorities to ensure the continuous utilization of water within the study area.

Wearable stitched transmission lines made from stripped RG174 and textile materials are introduced for broadband operations. The stitched transmission lines which are 150 mm long consists of an inner conductor surrounded by a tubular insulating layer. For shielding purposes, the structures are stitched into a denim material with conductive threads. The performances of the stitched transmission lines with three different stitch patterns, Double Overlock, Flatlock stitch and Ric-Rac stitch were investigated and results obtained confirm that Ric-Rac stitched transmission line has fewer DC losses than the three stitched transmission lines for frequencies up to 1 ???. However, beyond that up to 2.4 ??? and above, it was observed that the Flatlock stitched transmission line and the Double Overlock stitched transmission line have fewer radiation losses compared to the Ric-Rac stitched transmission line. Similarly, the performance of the stitched transmission line when bent through curved angles of 90° and 180° was considered, and a much better ??? was observed with a curved angle of 180° for frequencies below 2.1 ???, with radiation loss increasing afterwards. Finally, the sensitivity of the design to manufacturing tolerances, with changes in cross-sectional dimensions of the stitched transmission line and the transmission characteristics with different textile substrates were both considered. While simulated results showed that the stitched transmission line is sensitive to small variations in its circular dimensions, measured results conversely showed that Denim and Felt materials can be used as a substrate without any significant effect on its propagation characteristics.