A5087826753- Conducting polymers and applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Extraction and Separation Processes
- Metal Extraction and Bioleaching
- Minerals Flotation and Separation Techniques
- Metal Alloys Wear and Properties
- Polymer Surface Interaction Studies
- Advanced Photocatalysis Techniques
- biodegradable polymer synthesis and properties
- Manufacturing Process and Optimization
- Mining Techniques and Economics
- Copper-based nanomaterials and applications
- Bone Tissue Engineering Materials
- Structural Load-Bearing Analysis
- Lightning and Electromagnetic Phenomena
- TiO2 Photocatalysis and Solar Cells
- Metal Forming Simulation Techniques
- Mining and Resource Management
- Global Energy and Sustainability Research
- Private Equity and Venture Capital
- Aerosol Filtration and Electrostatic Precipitation
- Metallurgy and Material Forming
- Advanced Battery Technologies Research
- Materials Engineering and Processing
University of Namibia
2019-2025
The production performance of two hoisting systems operating in series at an underground gold mine was evaluated based on several key indicators (KPIs). All the KPIs were lower than mining industry benchmarks, mainly due to lengthy and recurrent machine downtimes. Frequent breakdowns, power cuts, poor maintainability, shaft flooding some factors affecting overall these systems, as captured developed Fishbone Diagram. average cycle times much longer expected, rates significantly a 5%...
Lead-free, bismuth-based perovskite solar cells (PSCs) are promising, non-toxic, and stable alternatives to lead-based PSCs, which environmentally harmful highly unstable under deprived air conditions. However, PSCs still suffer from low-power-conversion efficiency (PCE) due their large bandgap poor film morphology. Their film-forming ability is the greatest obstacle Cs₃Bi₂I₉ progress in thin-film cell technology. This study synthesizes novel, lead-free perovskites with a small bandgap,...
AA6082 is a relatively new structural alloy in the 6000 aluminium series. This study evaluated deep drawability of AA6082-O sheet metal. Uniaxial Tensile tests were conducted on specimens prepared according to DIN 50125-E standard, for three angular orienta-tions (0â°, 45â°, and 90â°) relative rolling direction. Erichsen Cupping 60 mm × blanks two gauge thicknesses (1.0 2.0 mm) also segmented blanks. A WP 300 Universal Material Tester, with loading capacity 20 kN, was used all tests. The...
Nanoparticle production and functionalization for various biomedical uses are still challenging. Polymer composites constituted of poly(amidoamine) (PAMAM), polyallylamine hydrochloride (PAH), calcium carbonate (CaCO3) nanoparticles have good biocompatibility with physiological tissue fluids, making them excellent candidates applications. This study investigated the characteristics polymeric/nano-CaCO3 composite films based on a PAH/PAMAM matrix, which were fabricated through layer-by-layer...
This paper discusses the coal-fired power plants (CFPPs) in Southern African Development Community (SADC), context of net-zero by 2050 initiative. It describes recent global climate change responses impacting operation CFPPs, and medium-to-long term prospects for coal power. The then motivators strategies sustaining operations CFPPs SADC, why international community has to let countries region other small developing nations, transition renewable energies at a more measured pace. also offers...
Coal-fired power plants utilising fluidised bed technologies emit copious amounts of fly-ash, which is harmful to people owing its particulate nature. A planned 300 MW plant will have an electrostatic precipitator (ESP) for fly-ash emissions control, in line with generation industry best practices. This ESP should meet a emission limit value ≤ 50 mg/Nm3. paper details the design process and resultant technical specifications cold-side, single-stage, plate-wire dry designed plant. The consist...
Abstract Bismuth-based lead-free perovskite solar cells (PSCs) are a non-toxic alternative to lead-based organic-inorganic hybrid PSCs. However, bismuth-based halides PSCs exhibit low power conversion efficiency (PCE) due the grain boundaries and interfacial defects in crystalline film. This discouragingly poor PCE has limited continued development of Herein, for first time on record, this work fabricated blended, heterojunction, all-inorganic consisting Cs 3 Bi 2 I 9 Ag BiI 5 absorber layer...
The study evaluated the curing properties of natural silica sand moulded with 1% by weight Furotec 132 resin binder catalysed Furocure CH Fast acid and Slow acid.Physical this included an AFS number 47.35, 4.40 % clay, 0 magnetic components, 0.13 moisture, 64.5 size distribution spread over three consecutive sieves (150 -600 µm).The was washed repeatedly to remove all clay oven dried. 2 kg samples were mulled pre-determined weights either catalyst give 30 %, 50 70 20 g which added...
This study examined the feasibility of recovering copper from a sulphuric acid leach solution chalcopyrite flotation plant tailings assaying 0.18 % and 0.19 zinc using DOWTM XUS 43578.00 ion exchange resin. Zn2+cations are counter ionsto Cu2+cations during process. Adsorption desorption tests were conducted on resin with containing26 mg Cu/L 225 Zn/L,under various conditions pH, 43578.00resin dosage, agitation time eluant(ammonium hydroxide solution) concentration. The...