Amid the COVID-19 pandemic, while the world sought solutions, few scholars exploited the situation for personal gains through deceptive studies and manipulated data. This paper presents the extent of 400 retracted COVID-19 papers listed by the RetractionWatch database until the month of February 2024. The primary purpose of the research was to analyze journal quality and retractions trends.
View Article and Find Full Text PDFIn this paper, we carried out a numerical analysis of the fluid dynamics and heat transfer occurring between two parallel disks. The study accounts for the impact of temperature-dependent fluid viscosity and thermal conductivity. We systematically investigated various parameters, including viscosity, thermal conductivity, rotational behavior (rotation or counter-rotation), and the presence of stretching, aiming to comprehend their effects on fluid velocity, temperature profiles, and pressure distributions.
View Article and Find Full Text PDFIn this study, the applicability of physics informed neural networks using wavelets as an activation function is discussed to solve non-linear differential equations. One of the prominent equations arising in fluid dynamics namely Blasius viscous flow problem is solved. A linear coupled differential equation, a non-linear coupled differential equation, and partial differential equations are also solved in order to demonstrate the method's versatility.
View Article and Find Full Text PDFIn this paper, the numerical solution for heat transfer through a rotating heat pipe is studied and a sensitivity analysis is presented by using statistical experimental design technique. Graphene oxide-molybdenum disulfide (GO-MoS) hybrid nanofluid is taken as working fluid inside the pipe. The impact of the heat pipe parameters (rotation speed, initial mass, temperature difference) on the heat transfer and liquid film thickness is investigated.
View Article and Find Full Text PDFBreast cancer (BC) is the second leading cause of death in developed and developing nations, accounting for 8% of deaths after lung cancer. Gene mutation, constant pain, size fluctuations, colour (roughness), and breast skin texture are all characteristics of BC. The University of Wisconsin Hospital donated the WDBC dataset, which was created via fine-needle aspiration (biopsies) of the breast.
View Article and Find Full Text PDFChildren are particularly vulnerable to the consequences of HIV/AIDS. This paper reports on the challenges faced by children due to their or their parents' HIV/AIDS status and the role of HIV-sensitive social protection in mitigating these challenges. We conducted 32 semi-structured in-depth interviews - 15 with children affected by HIV/AIDS (aged 13-18 years) and 17 with parents of children aged 10-12 years.
View Article and Find Full Text PDFIntroduction: The study described the effectiveness of a voucher scheme to access sexual and reproductive health and HIV services among young MSM and transgender people aged 15-24 years in Dhaka, Bangladesh, a country with HIV prevalence of less than 0.1%.
Methods: Descriptive and analytical methods were used to assess the net effects of biodemographic factors of the respondents on the voucher scheme.
Background: Serum-based rapid HIV testing algorithm in Bangladesh constitutes operational challenge to scaleup HIV testing and counselling (HTC) in the country. This study explored the operational feasibility of using whole blood as alternative to serum for rapid HIV testing in Bangladesh.
Methods: Whole blood specimens were collected from two study groups.
Nanoscale Res Lett
February 2013
The unsteady natural convection heat transfer of nanofluid along a vertical plate embedded in porous medium is investigated. The Darcy-Forchheimer model is used to formulate the problem. Thermal conductivity and viscosity models based on a wide range of experimental data of nanofluids and incorporating the velocity-slip effect of the nanoparticle with respect to the base fluid, i.
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