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Designing robust sampling frameworks for mixed methods research: challenges and practical guidelines
(IGI Global Scientific Publishing, 2026-03-18) Lyaka, Martha; Mukungu, Isaac; Rugambwa, Nina Olivia; Ngulube, Patrick
In recent years, research in mixed methods has received considerable attention in a wide range of fields, including computer science and informatics. This methodology encourages the integration of both qualitative and quantitative data to provide a comprehensive picture of complex phenomena. However, one of the main problems faced by researchers participating in mixed method projects is that of sampling. Sampling, as a cornerstone of methodological rigour, has an impact on the validity and application of research findings. The aim of this chapter is to analyse the nuances of sampling in the context of mixed-method research, specifically to address the complexity involved and to provide practical suggestions for computational and informatics researchers.
Designing robust sampling frameworks for mixed methods research : Challenges and practical guidelines
(IGI Global Scientific Publishing, 2026-03-17) Lyaka, Martha; Mukungu Isaac; Rugambwa Nina Olivia; Ngulube Patrick
In recent years, research in mixed methods has received considerable attention in a wide range of fields, including computer science and informatics. This methodology encourages the integration of both qualitative and quantitative data to provide a comprehensive picture of complex phenomena. However, one of the main problems faced by researchers participating in mixed method projects is that of sampling. Sampling, as a cornerstone of methodological rigour, has an impact on the validity and application of research findings. The aim of this chapter is to analyse the nuances of sampling in the context of mixed-method research, specifically to address the complexity involved and to provide practical suggestions for computational and informatics researchers.
Examining the potential of mobile money-based health insurance for people living with HIV and hypertension or diabetes in Uganda
(Frontiers in Health Services, 2026-03-17) Zakumumpa, Henry; Ssempala Richard; Jepchirchir Kiplagat; Japheth Kwiringira; Wilm Quentin; Verena Struckmann
Background: Digital technologies are increasingly promoted as alternative pathways for financing universal health coverage (UHC) in sub-Saharan Africa,
yet evidence on their acceptability among informal-sector populations remains limited. This study explored the acceptability of mobile money–based
private health insurance among people living with HIV (PWH) with comorbid hypertension or diabetes in Uganda.
Methods: We conducted an exploratory qualitative study in Fort Portal City, midwestern Uganda. Data were collected through four focus group discussions with
PWH (n = 48) and 18 key informant interviews with representatives of telecom companies, private health insurers, regulators, and health providers. Data were
analyzed thematically using an established analytical framework on facilitators and barriers to mobile health technologies.
Results: PWH reported rising out-of-pocket expenditures for managing hypertension and diabetes compared to HIV care, which remains largely
donor-funded. Facilitators to uptake included high mobile phone ownership, widespread use of mobile money, perceived affordability of monthly
premiums (USD 1.35–8.20), prior experience with mobile money insurance, and convenience of digital payments. Barriers included limited understanding
of insurance principles, mistrust of private insurers, fears of mobile money fraud, high internet data costs, intermittent electricity supply, and
widespread poverty.
Conclusion: Mobile money–based health insurance was perceived as affordable and acceptable among PWH with NCD comorbidities. However, low insurance
literacy and mistrust of insurers remain major obstacles. Mobile money–based health insurance warrants further research as a complementary pathway for expanding health insurance coverage in Uganda and similar settings.
Advanced graphene–MXene–black phosphorus multilayered metasurface sensor for high-sensitivity terahertz brain tumor detection
(AIP Advances, 2026-03-11) Wekalao, Jacob; Elsayed, Hussein A.; Alqhtani, Haifa A.; Almawgani, Abdulkarem H. M; Gumaih, Hussein S.; Adam, Yousif S.; Mehaney, Ahmed; Ochen, William
In this research, we present a multilayer metasurface sensor design integrating graphene, MXene, black phosphorus, and gold for the ultrasensitive detection of brain tumor biomarkers in liquid biopsy samples. The hierarchical structure consists of a MXene-coated rectangular resonator, a black phosphorus-coated square resonator, a gold-coated circular ring, and a graphene-based circular substrate. This architecture was systematically optimized through comprehensive numerical simulations using COMSOL Multiphysics 6.3, integrated with machine learning frameworks. The proposed sensor demonstrates an outstanding sensitivity of 2308 GHz/RIU across a physiologically relevant refractive index range (1.3333–1.4833), significantly outperforming current state-of-the-art devices. Performance analysis identifies an optimal sensing regime at RI = 1.3425, achieving a figure of merit of 20.79 RIU−1 and a detection limit as low as 0.079 RIU. Detailed investigations of the transmission spectra under varying graphene chemical potentials (0.1–0.9 eV), incident angles (0○ –80○ ), and geometric modifications of the resonators reveal highly tunable sensing behavior. Furthermore, Random Forest Regression models achieve predictive accuracies of 85%–100%, enabling reliable estimation of sensor performance across diverse operating conditions. Collectively, these results establish a solid foundation for employing advanced 2D material–based metasurfaces in minimally invasive and early-stage brain tumor diagnostics, thereby advancing the capabilities of next-generation liquid biopsy technologies.
Production of typeface using the long-horns of Ankole cattle: a case of Mbarara municipality
(Kyambogo University (Unpublished work), 2024-08) Himbisa, Nimrod
The purpose of this study was to develop typeface from the long-horns of Ankole cattle with the aim of preserving the Ankole heritage through their creations. The objectives of the study were to; examine the long-horned Ankole cattle of Mbarara, explore ideas for creating long-horned Ankole typeface and develop typeface from long-horned Ankole cattle. The study had a population of 13 respondents who provided information through interviews and analysing documents in the possession. The study was qualitative and used descriptive approach. The findings indicate that long-horned Ankole cattle had numerous characteristics suitable for the creation of typeface, providing wide range of options to fully develop and create typefaces. The use of manual and digital process was essential in the refinement of the final characters. The findings could impact graphic designers by introducing a unique, culturally enriched typeface that can be used in various design applications. The study highlights how integrating cultural elements into typeface design using an exploratory research design can enhance the visual identity and storytelling aspects of graphic design projects. By creating typeface that embody the distinct features of the Ankole long-horned cattle, designers can add a layer of cultural significance and authenticity to their work. The study also recommends exploring other characteristics of the long-horned Ankole cattle for typeface creation, further expanding the variety of culturally inspired typeface available for use in the graphic design industry