• Book : 47(1)
• Pub. Date : 2025
• Page : pp.288-304
• Keyword :

• Book : 22()
• Pub. Date : 2025
• Page : pp.1-5
• Keyword :

Abstract

Husbands' labour migration has ramifications for significant family members, particularly wives left behind. However, limited studies have been conducted to examine the impacts of husbands' migration on women left behind married to international and internal migrants. Drawing on a purposive sampling survey of 298 Ghanaian women (international = 129 and internal = 169) in the Volta Region, we assessed their subjective wellbeing using three dimensions: self‐reported health, self‐reported satisfaction with life, and self‐reported happiness. The results from t‐tests show that on average, international women left behind have higher perceived health (3.72), perceived happiness (3.82) and satisfaction with life (3.19). Results from the multivariable binary logistic regression analyses reveal that while no variables predict self‐reported health for international women left behind, high frequency of communication is statistically associated with internal women left behind self‐assessed health. International women left behind who lived in nuclear households and internal women left behind who reported high wealth quintiles were both statistically associated with satisfaction with life, respectively. While demographic factors (age and duration of marriage) were significant predictors of happiness for international women left behind, neighbourhood type and frequency of communication predicted happiness for internal women left behind. The differences in variables predicting each of the subjective wellbeing dimensions demonstrate the concept's multidimensionality. It also highlights factors influencing subjective wellbeing outcomes of women left behind are not solely due to their husbands' migration. The policy implications of this study are highlighted.

• Book : 31(1)
• Pub. Date : 2025
• Page : pp.e2858
• Keyword :

The manipulation of particles by acoustic radiation force (ARF) has the advantages of non-invasiveness, high biocompatibility, and wide applicability. The study of acoustic radiation force is an important foundation for improving the accuracy and effectiveness of particle manipulation technology. Based on the acoustic wave theory, a theoretical model for the ARF of a free spherical particle in a bounded viscous fluid is established. The ARF for the case of a normal incident plane wave is derived by applying the translation addition theorem for spherical function. The dynamic equation of the free sphere is required as a correction term for calculating the ARF. The effects of the fluid viscosity, particle material, particle distance from boundary, and the boundary on the ARF are analyzed by numerical simulation. The results show that the resonance peak of the ARF curve is broadened with increase of the viscosity of the fluid. Comparing the values of the ARFs of a PE sphere in a viscous and an ideal fluid, it is found that the influence of fluid viscosity is small and the viscosity effect can be ignored when kR is much less than 1; However, for cases where kR is greater than or equal to 1, the amplitude of the ARF experienced by a particle in a viscous fluid is much greater than that in an ideal fluid. The influence of fluid viscosity on the ARF is significant and cannot be ignored. Moreover, compared to a liquid material sphere, the oscillation of ARF in an elastic material sphere is more pronounced. This is because the momentum transfer between sound waves and elastic materials is greater than that between sound waves and liquid materials. In addition, the amplitude of the ARF increases as increasing the reflection coefficient of the impedance boundary, but its resonance frequency is not affected. Finally, the position of the sphere mainly affects the oscillation phenomenon of its ARF. The peaks and dips of the ARF become more densely packed with the growth of distance-to-radius. It is worth noting that the reflection coefficient mainly affects the amplitude of the ARF, while the position of the sphere affects the period of the ARF function. The results indicate that more efficient manipulation of particles can be achieved through appropriate parameter selection. This study provides a theoretical basis for the acoustic manipulation of a free particle in a bounded viscous fluid and contributes to the better utilization of ARF for particle manipulation in biomedical and other fields.

• Book : 74(1)
• Pub. Date : 2025
• Page : pp.0
• Keyword :

In recent years, magnetic particle imaging (MPI) has emerged as a promising imaging technique depicting high sensitivity and spatial resolution. It originated in the early 2000s where it proposed a new approach to challenge the low spatial resolution achieved by using relaxometry in order to measure the magnetic fields. MPI presents 2D and 3D images with high temporal resolution, non‐ionizing radiation, and optimal visual contrast due to its lack of background tissue signal. Traditionally, the images were reconstructed by the conversion of signal from the induced voltage by generating system matrix and X‐space based methods. Because image reconstruction and analyses play an integral role in obtaining precise information from MPI signals, newer artificial intelligence‐based methods are continuously being researched and developed upon. In this work, we summarize and review the significance and employment of machine learning and deep learning models for applications with MPI and the potential they hold for the future.

Level of Evidence

5

Technical Efficacy

Stage 1

• Book : 61(1)
• Pub. Date : 2025
• Page : pp.42-51
• Keyword :

Abstract

The current paper investigates the magnetohydrodynamic pulsating flow of micropolar nanofluid in a vertical porous channel by using Buongiornos nanofluid approach and utilizing entropy generation. The effects of thermal radiation, viscous dissipation, Brownian motion, and thermophoresis are considered. This finding holds implications for the fields of biomedical engineering, food processing systems, cancer treatment, pressure spikes, and nano-drug delivery in arteries. In this case, the governing partial differential equations (PDEs) are converted into ordinary differential equations (ODEs) using the perturbation approach and we used Runge-Kutta fourth order method for the numerical approach. Graphical representations illustrate the effects of nanoparticle concentration, velocity, temperature, and micro-rotation across various standard physical parameters. Furthermore, analysis and tabular presentation of the heat and mass transfer rates are provided. The data obtained indicate that while raising the Hartmann number and coupling parameter decreases velocity profiles then increasing the Grashof number enhances velocity. The temperature of a micropolar nanofluid rises with increased Brownian motion and thermophoresis, and falls with increased magnetic field and thermal radiation. The concentration of micropolar nanofluid is reducing by enhancing the thermophoresis and chemical reaction parameter. The rate of heat transfer is increasing as a result of increases in thermal radiation, viscous dissipation, thermophoresis, and Brownian motion values. The heat transfer rate rises with increase values of the viscous dissipation, thermal radiation, the Brownian motion, and the thermophoresis parameters. This study is useful for various real life applications like biological systems, biotechnology, pharmaceutical medicine, nano-drug development, and engineering industries.

• Book : 100(1)
• Pub. Date : 2025
• Page : pp.015205
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110956
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110931
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110951
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110933
• Keyword :