Hydrokinetic turbine is typically used to drive power production in rural communities, which are not connected to national grid electricity services. The interaction of the rotor and water determines the power generation of the hydrokinetic turbine. A suitable choice of the rotor in terms of its geometry has to be in placed to extract the most kinetic energy possible from the water and transform it into useful energy. The procedures in this study involved using ANSYS Fluent to perform Computational Fluid Dynamics [CFD] simulation to numerically simulate a newly designed [modified] small hydrokinetic turbine rotor. Estimation of the performance of the blade design, such as, looking at its maximum power coefficient and tip speed ratio, as well as other related fluid dynamic analysis, such as flow field analysis and pressure distributions will be presented and discussed. According to the research findings, the newly designed (modified version] small hydrokinetic turbine can generate approximately 170W of power at the optimal tip speed ratio when it is operated in a current with a flow velocity of 1m/s. This is sufficient for operating LED lighting and ceiling fans, among other applications. This simulation results highlights the practicality and efficiency of hydrokinetic energy in real-world scenarios. Keywords: Hydrokinetic Turbine, New Design, CFD, ANSYS, power coefficient, tip speed ratio, flow analysis ,pressure distribution, blade pitch angle, torque & power generation

The objective of this research is to examine the thermophysical features of magnetic parameter (Ha) and time step (τ) in a lid-driven cavity using a water-based Al2O3 nanofluid and the efficacy of ANN models in accurately predicting the average heat transfer rate. The Galerkin weighted residual approach is used to solve a set of dimensionless nonlinear governing equations. The Levenberg-Marquardt back propagation technique is used for training ANN using sparse simulated data. The findings of the investigation about the flow and thermal fields are shown. Furthermore, a comparative study and prediction have been conducted on the impact of manipulating factors on the average Nusselt number derived from the numerical heat transfer analysis. The findings of the research indicate that, in the absence of magnetohydrodynamics, a rise in the Hartmann number resulted in a drop in both the fluid velocity profile and magnitude. Conversely, it was observed that the temperature and Nusselt number exhibited an increase under these conditions. The mean temperature of the fluid rises as the Hartmann number drops, reaching a peak value of 0.114 when Ha = 0. The scenario where Ha = 0, representing the lack of magnetohydrodynamics, shows the highest average Nusselt number, whereas the instance with Ha = 45 presents the lowest Nusselt number. The ANN model has a high level of accuracy, as seen by an MSE value of 0.00069 and a MAE value of 0.0175, resulting in a 99% accuracy rate.

Research conducted on the poetry of Muda Omar Ali Saifuddien has indeed received attention from local and international researchers. There are many issues that can be discussed and summarized by looking at various aspects such as religion, history, medicine, economics, and education. Accordingly, this study looks at the educational aspect in the works of Muda Omar Ali Saifuddien and the implementations that have been achieved during the era of His Majesty's reign. This study also touches on the thoughts in three poems by Muda Omar Ali Saifuddien, namely Syair Perinstitution of the Brunei State, Syair Asli Rajang Hari, and Syair Nasihat. The thoughts in Muda Omar Ali Saifuddien's work and its implementation focuses on three important elements, namely the moral, the infrastructure development, and the welfare. Thoughts on the educational aspect discuss several verses of Muda Omar Ali Saifuddien's poetry related to education aspect. This thinking has resulted in implementations such as the development of primary schools, secondary schools, and vocational technical schools in the country of Brunei Darussalam. Apart from evidence in terms of elements of infrastructure development, elements of morals and elements of virtue such as the application of pure values, the application of Islamic education, the holding of the MIB philosophy, the provision of financial allocations, scholarship offers and the structure organization of the education sector during the reign of Muda Omar Ali Saifuddien were also discussed. In fact to strengthening the research argument, this research uses qualitative methods based on previous research studies, books, articles and journals and newspapers related to the topic of this study. Apart from that, close reading methods and internet sources are also used to support evidence in the study.

The daily energy demand in public buildings has been on the rise, partly due to the intensive use of building energy-comfort technologies. Hot water production, space heating and air-conditioning are the major consumers of energy in public buildings; if their energy demand can be addressed holistically through the integration of solar collectors with public buildings, it will bring about a reduction in energy costs. Fossil fuels, such as coal, oil and gas, are the most significant contributor to global climate change, accounting for over 75% of global greenhouse gas emissions and nearly 90% of all carbon dioxide emissions. Environmental experts are clear, that to avoid the worst impacts of climate change, emissions need to be reduced by almost half by 2030 and reach netzero by 2050. To meet the global energy demand and minimise environmental hazards, the world needs to reduce its over-reliance on fossil fuels for public building energy consumption and invest in alternative sources of energy that are clean, accessible, affordable, sustainable, and reliable. Our review aims to provide a comprehensive analysis on the various uses of solar thermal collectors in public buildings as a source of green energy supply. The benefits of a potential developed nano-coated absorber surface for solar collectors were studied, and its possible effect on minimising corrosion in heat pipes, absorber surfaces and thermal storage tanks was considered. The merits of using solar collectors, as well as the knowledge gap, limitations, trends and future research prospects are discussed elaborately. Critical attention was paid to recent and past developments in this regard, a technical outlook of various studies is highlighted, and the link between them in addressing the world’s over-dependence on fossil fuels is studied.

The prevalence and impact of antibiotic-resistant pathogens transmitted through food, particularly street-vended foods, is becoming a major public health concern. Although a significant proportion of the urban population in developing countries consumes street-vended foods, the role of these foods in spreading antibiotic resistance has been rarely investigated. In this study, 50 bacterial isolates were obtained from 25 samples representing five categories of street-vended foods: Phuchka, Chatpati, Sausage, Bun, and Salad. The IMVIC test revealed a notably high occurrence of Escherichia coli (n=32) within the collected samples. Three representative isolates were selected for molecular identification using DNA sequencing of 16S rDNA. They were identified as Klebsiella oxytoca, Burkholderia fungorum, and Serratia nematodiphila. The antibiotic susceptibility of the identified isolates (n=35) was investigated using twelve antibiotics following the Kirby-Bauer disk diffusion method. Around 65.63% of the E. coli isolates (n=21) exhibited multidrug resistance. Double Disc Synergy Test (DDST) and Phenotypic Confirmatory Disk Diffusion Test (PCDDT) confirmed ESBL production of Eight multidrug-resistant E. coli isolates (38.09%). The multiple antibiotic resistance (MAR) index showed that 22 E. coli isolates had MAR above 0.2, with resistance mostly against oxacillin, ampicillin, and cefuroxime. The Klebsiella oxytoca isolate showed multidrug resistance viz., ampicillin, oxacillin, cefuroxime, and kanamycin. The Burkholderia fungorum isolate showed no distinct inhibition zone against ampicillin and chloramphenicol. Additionally, the Serratia nematodiphila isolate showed no distinct inhibition zone against three antibiotics, including ampicillin, oxacillin, and cefuroxime. These findings might contribute to the knowledge of emerging antibiotic-resistant foodborne pathogens and raise concerns about the safety of street-vended foods in Bangladesh.